Air controlled disc brake with control slider

FIELD: transport.

SUBSTANCE: invention relates to machine building, particularly, to disc brakes. Air controlled disc brake comprises support, brake cylinder and self-booster. Brake support comprises brake shoes arranged on clamp side and counteraction side. Brake cylinder can be loaded with compressed air to generate braking force and to act on clamp for clamping the brake shoe. Said clamp comprises rotary brake lever. Brake shoe on clamp side can displace both parallel with brake disc rotational axis and with brake disc friction surface. Self-booster features boost factor selected so that brake automatically releases after braking. Said factor is smaller than or equals 2.2.

EFFECT: higher reliability, safe and faultless design.

13 cl, 5 dwg

 

The invention relates to a pneumatically controlled disk brake mechanism in accordance with the restrictive part of paragraph 1 of the claims.

Pneumatically operated brake mechanisms are known, for example, from DE 4032885 A1 or WO 97/22814. Desirable is less space and weight loss such brake mechanisms and, in particular, reduction of the area occupied by the relevant Executive control - cylinder of the brake mechanism. The brake mechanism must, however, be operational characteristics controlled by compressed air brake mechanism, such as reliable automatic vacation and accurate dosing of the braking effect. Must remain unchanged simplicity and reliability, and low cost of production controlled by means of compressed air disk brake mechanism.

The solution to this problem is the task of the invention.

The problem is solved by the characteristics of paragraph 1 of the claims.

The drum brakes use the self is systematically determined. Driven by compressed air drum brakes for heavy trucks have samoushirenie, which, however, depending on structurally what about the performance used with different intensity.

Managed by V-brakes drum brake mechanisms with two expander devices double-acting implemented a high degree of the self. Such brake mechanisms have been used as controlled by compressed air brake mechanisms in heavy trucks, however, did not find the further spread because of the high degree of the self, along with a limited breakdown on stage, had the consequence of unequal braking effect, as well as varying the parameters of wear.

Drum brakes Simplex with control by the Cam S-shaped profile before the introduction of the drum brake with control by means of compressed air was practically the only option brake heavy-duty trucks. A special advantage of this design drum brakes is that due to the hard clip by Cam S-shaped profile, the impact of the self is reduced and, above all, wear loaded and unloaded brake pads inside the brake mechanism becomes more uniform. However, in the first S-shaped form has a relatively strong differences in braking forces associated with uneven braking effect and n is a very convenient mode of actuation of the brake mechanism.

In Western Europe, drum brakes with Cams S-shaped profile have been replaced by managed by compressed air disc brake mechanisms, and their special advantage is seen, in essence, that in them there is no effect of the self, accompanied by the associated disadvantages.

Fundamentally different is the case with managed by means of the motor disc brake mechanisms, in which through the use of the self is an interesting attempt to reduce the otherwise very high energy of this structural type brake mechanisms. Moreover, driven by electric motor brake mechanisms can operate with regulation in place, resulting in the exposure of the self to the mode of operation of the brake mechanism remain more manageable (see, for example, DE 10156348, DE 10139913.8 or DE 102005030618.7 and DE 102006036279.9 or WO 2007/082658).

Managed by compressed air disk brake mechanisms, based on experiments with drum brakes with samozrejme, just wanted to use the self as the energy source for actuation is not, in fact, any significant problem. The invention departs from this trend, since in the future the end of the operations of vehicles and concepts axis necessary for the control cylinders constructive space is a problem. In particular, needed to implement the function of the Parking brake spring energoakkumulyator significantly complicates the installation of the brake mechanism. The solution of this problem provides, in particular, the disc brake mechanism in accordance with the invention, in which the clamping device, along with a rotating lever is in the preferred embodiment, the device of the self and located on the side of the clip brake pad can each time be displaced both in the direction parallel to the axis of rotation of the brake disc and parallel to the friction surface of the brake disc. In a preferred embodiment of the device of the self are connected in parallel push-on device.

Net power brake cylinder through the use of the effects of the self is reduced so that the result is a reduction of the design space. However, the preferred operating mode of the brake mechanism is maintained, in particular, when the brake mechanism is implemented in accordance with evidence, paragraph 2, of the claims. In accordance with paragraphs 2 and 3 of the claims, the idea of the self in pneumatically controlled disk brake mechanism particularly preferred way is supplemented, as already at relatively small from the cylinder the customers of the self is possible a significant reduction of structural dimensions of the brake cylinder and the spring energoakkumulyator. Samoushirenie is selected using the corresponding parameters of the angle of the wedge or angle so that the maximum possible coefficient of friction of the brake linings is reliable auto release the brake mechanism. Differently than driven by electromotor of disk brake mechanisms, a motor for clamping the brake mechanism should not, thus, be used for vacation of the brake mechanism. Through implementation of this option it is possible to obtain the coefficient of the self is approximately equal to 2.

This is explained in greater detail based on the example.

With an estimated coefficient of friction 0,375 arising during operation of the friction coefficient under the assumption of the range of dispersion of +/- 20% can be from 0.3 to 0.45. Based on the frictional properties of the lining can be made reliable regenerating mode is still quite powerful opposing efforts for rapid automatic vacation, if the angle α of the taper or slope is chosen so that tan(α) taking into account the mechanical losses corresponds to the value t·µ=0,65 (eta=mechanical efficiency, µ - coefficient of friction pads).

With this embodiment, the double decreases not only a design space and power consumption operating brake cylinder, what about the and energy, necessary to adjust the spring energoakkumulyator when the Parking brake, as when stopping the vehicle on the rise because of the current on the bias drive force, samoushirenie applies the Parking brake.

In particular, the refusal of the transfer high return tension to the cost of support can be reduced. Possible simple concept supports with bearings in the form of poluchasa, as currently in mass production of disc brakes constructive type "Knorr-Bremse SN6 oder SN7" or "sliding supports in the form of beads, as described in WO 2007/082658.

The rational seems to be attaching the pressure plate to the control plunger with the possibility of reverse discharge. Thus, the internal force of the return spring is used to reset the brake pads after the braking process, and also saved the preload between the rolling elements and the surfaces of the bias on the amplifier the plungers. Because only a small amount of effort of abstraction, it is also possible simplified and adaptable to mounting solution in the form of a recorded clip of the bolt or ball bearings.

A particular advantage of the described concept of the brake mechanism are:

- reduced t rosnay cylinder and spring energoakkumulyator,

- reduced the size of the compressor and other components of air supply, due to reduced demand for compressed air from brake system,

- reduced energy demand from the system of air supply brake installation

- no disruption in control technology brake setting: brake mechanism behaves in the process of braking control as usual driven by compressed air brake,

- fully equipped brake system with the use of the self.

Preferred options for implementation are:

- construction of the brake mechanism located in the middle of the controllable brake cylinder via a lever of the brake mechanism, the managing plunger and with two parallel positioned reinforced plungers,

- guide plate, which transmits circumferential force from the amplifier plugs directly fixed on the axis of the structural element of the brake mechanism,

- made with the possibility of cross-rotation bearing of the control plunger,

the choice of the self so that becomes the system of wedge-effective opposing tangential force at the maximum possible coefficient of friction of the brake pads and taking into account mehanicheskij loss is still so strong, as in the case of ABS-adjustment takes place quite fast automatic vacation. To determine the maximum possible coefficient of friction pads in accordance with the invention, the basis can be laid the range of dispersion of the friction coefficient +/- 20% of the calculated coefficient of friction.

At least, the required tangential opposing force is defined with a value of approximately 10% of the total clamping force of the brake mechanism. The amount depends on the level of resistance to friction and dynamical masses. This value seems at first small, as usual, managed by compressed air disk brake mechanism without the self total clamping force of the brake mechanism is available for quick release. The analysis of the process of holiday shows, however, that vacation time is largely determined by the aerodynamic resistance when removing the air from the brake cylinder. As in brake mechanism samozrejme should blow a much smaller volume of air, the effect of decreased opposing efforts offset.

The gear ratio of the lever of the brake mechanism with the accounting resulting from the self component of the clamping force of approximately 50%, as well as possible maxima is lnyh working surfaces of the brake or of the combined brake cylinder, is chosen so that the length of the stroke, and thus, the required structural length of the cylinder is minimized.

Alternatively, it is possible to perform, in which the diameter of the cylinder should be reduced. Then its final drive ratio is minimized, respectively, in another way.

As the preferred option should be mentioned also recorded a clip with the possibility of reverse discharge of the pivot bearing push plate.

When using pneumatically driven disk brake mechanism with samozrejme also no need for costly adjustment with the aim of getting on the vehicle, despite proposed in the respective coefficients of the self deviation coefficient of friction, a satisfactory braking mode.

When specified in paragraphs 2 and 3 of the claims ratio of the self mode braking of heavy vehicles remains unexpected and without electronic control, or possible only on the basis of available today, as a rule, modern vehicles with pneumatically controlled brakes, control systems or adjustment, such as the ABS system or EBS system, and, moreover, without the possibility of maintaining vacation disk brake mechanism is a exploits the use of additional control to clamp the brake mechanism.

Particularly preferred is the use of the device control lever rotary lever with the axis of rotation orthogonal to the axis of rotation of the disk brake mechanism for clamping the disc brake mechanism samozrejme with pneumatic actuators control.

In a preferred embodiment of the control slider is mounted on the rotary lever of the brake mechanism and the push plate and on the side of the clip brake pad with - preferably intersecting the axis of rotation to perform a rotary motion, which makes the concept of the torque control lever suitable for disc brakes with samozrejme.

Next, the control slider to perform a rotary motion is preferably mounted on the rotating lever of the brake mechanism and the push plate and on the side of the clip brake pad so that can transmit tensile and compressive force between the brake pad and the driving mechanism (for example, an electric motor and screw-drive mechanism).

The concept of the control slider or control plunger should not be understood in too narrow meaning. It includes, in particular, and changing the length to structurae nodes of several elements.

In a particularly preferred embodiment, the control slider is installed and fixed on the axis of rotation of the eccentric rotating lever of the brake mechanism and the push plate and on the side of the clip brake pad so that the rotary movement of the rotary lever of the brake mechanism, and movement offset on the periphery of the brake pads and, under certain conditions, the push plate can be compensated by turning in both perpendicular to each other, and directions.

Thus, at small the required structural space is as necessary to achieve the effect of the self moving on the periphery of the pressure plate, and trim the tipping movement of the control slide because its in Cam rotating lever of the brake mechanism exclusively, to perform a rotary movement.

In a preferred embodiment, the node Manager of the slide on both installation ends has a rotary supports, for example, spherical sliding bearings.

In addition, in accordance with a particularly preferred implementation of the invention, also provides for the possibility of introducing the adjusting rotary movement performed with a chance to view the Yu rotary movement in two directions, the control slider.

For this purpose, the control slide made primarily as axially varying in length, in particular, the telescopic structural node, which makes it possible to change the length of the plunger of the brake mechanism, to compensate for wear of the linings and/or disk.

In a preferred embodiment, the structural site Manager of the slide consists of a control slider and the threaded spindle, and through the clock drive is connected with an adjusting device.

In a particularly preferred embodiment, the node Manager of the slide, consisting of the Manager of the slide and threaded spindle for adjusting transmission of rotational motion, structurally simply connected with the toothed wheel.

The construction of the gears in the preferred embodiment is such that when not powered brake mechanism, that is, in the rest position of the control slider, there is a narrow clearance between the impeller and the following attached gears.

When powered brake mechanism gears by means of the adjusting movement of the control slider appear, however, from the mesh so that it becomes possible subsequent rotary movement of the control slider.

For pivot bearings on the axis of rotation of the eccentric torque the I lever of the brake mechanism, and in the place of connection of the pressure plate to the control slide, possible alternative ways of execution.

In a preferred embodiment, the stationary structural element of the device of the self is connected with an adjusting device thus installed with a minimum clearance parallel to the axis of rotation of the brake disc between the guide surfaces fixed on the axis of the structural element of the brake mechanism, when the braking emerging regional efforts directly from this stationary structural element of the device of the self based on rigidly fixed on the axis of the structural element of the brake mechanism.

The invention is illustrated by drawings, which presents the following:

figure 1 - the first section of the disk brake with a sliding caliper, with the housing of the brake cylinder;

figure 2 - the disc brake mechanism of figure 1 with a schematically an image of two different dimensions that are installed on the disc brake mechanism of the brake cylinder;

figure 3 is perpendicular with respect to the section of figure 1 slit disk brake mechanism of figure 1;

4 is a perspective view of the disc brake mechanism of figure 1;

5 is a fragment of the brake mechanism to clear the German versions of the design execution of the brake mechanisms in accordance with figure 1-4.

Figure 1 shows a disk brake with a sliding caliper (with short plate) located on both sides of the brake disk 1 brake pads 2 and 3.

An embodiment in the form of a disk brake with a sliding caliper is possible constructive form. Embodiments of the in the form of a disk brake mechanism with the rotating caliper or in the form of a disk brake mechanism with a fixed caliper, or mixed variants of structural types is possible here, however, is not shown.

Disk brake with a sliding caliper has overlapping the brake disc 1 in the area of the peripheral edges, one-piece or in this case, the composite support plate 32 of the disc brake mechanism (here with lid caliper disk brake mechanism), which contains the clamping device. The support plate 32 of the disc brake mechanism through the guide 46 to bias the caliper with shift held rigidly mounted on the axis of the shield 31 of the brake mechanism (Fig 3).

The brake cylinder 27 as a motor, which is mounted or formed on the caliper disk brake mechanism (figure 1), through the piston rod 26 acts on preferably an eccentric mounted in the support plate 32 of the disc brake mechanism rotating richg brake mechanism, who as a result of actuation by the brake cylinder can be rotated around an axis of rotation oriented perpendicular to the schematic outline of the axis of rotation D of the brake disk.

The rotating lever 15 of the brake mechanism through at least one of the plunger 11 of the brake mechanism operates further, directly or through a pressure plate on the location of the clamp on the brake pad 3.

When the plunger 11 of the brake mechanism and the rotating lever 15 of the brake mechanism and the plunger 11 of the brake mechanism and the push plate 4 articulated to each other so that the plunger 11 of the brake mechanism when the clamp disk brake mechanism is fully or at least mostly able to follow the movement of the brake pads 3, located on the side of the clamp in the direction of the periphery of the brake disc 1.

Clamping device designed this so that the brake pad 3 may influence compressive force.

Brake pad 3 located on the side of the government, placed in a pressure plate 4, which can also be executed as a single unit with the brake cylinder.

Push plate 4 made with the possibility of displacement parallel to the friction surface of the brake disc and pose the CTV set of rolling bodies, in this case, the balls 5 and 6, is in active connection with a wedge-shaped slope 7 and 8 axially varying along the length of the pressure plungers or the adjusting piston 9 and 10, which are mounted at an acute angle from 0° to 90° to the friction surface of the brake disc. Grades 7, 8 could be also, or in addition also performed in the pressure plate 4. The balls or other rolling elements) are in this case carried out in spherical recesses of the pressure plunger, which, however, would be part of the device of the self in accordance with paragraph 1 of the claims.

With the push plate 4 - as mentioned previously - articulated managing the slider 11 to transmit force in the direction of the brake disc compressive and tensile forces.

This articulation is effected in this case by means of a bolt 33 and a head 34 of the fork.

This articulated connection with the offset on the periphery of the pressure plate 4 makes it possible rotary movement of the slide guide 11 around the center 12 of the bulb (located on the axis of rotation of the eccentric spherical bearing 13.

The spherical bearing 13 on the axis 14 of the eccentric rotating lever 15 of the brake mechanism for transmitting driving effort is installed on the control slide 11.

The control slide 11 swinfen screw-RAM 16, the rich screw the slider 16, in turn, is firmly connected with the housing 17 of the hinged support.

The control slide 11 forms a screw-RAM 16, to adjust wear, varying along the length of the slider or the adjusting piston.

Similarly, both of the pressure plunger 9 and 10 swiney with threaded spindles 18 and 19, which transmit the reference force of the pressure plungers 9, 10 on the housing of the brake mechanism or the support plate 32 of the brake mechanism.

Threaded spindles 18, 19 are connected with the screw-RAM 16 by the clock drive. Due to this rotational movement of the adjusting drive only simultaneously affects both push plunger 9 and 10, and the control slide 11.

The rotating lever 15 of the brake mechanism by means of two bearings 23, 24 rolling, with small friction losses, installed in two of the support bracket 21, 22.

The support brackets 21, 22 are firmly connected to the housing, respectively, the support plate 32 of the brake mechanism.

On the shoulder of the rotating lever 15 of the brake mechanism mounted or pivotally attached to the piston rod 26, for transmitting compressive/actuation forces.

Push the plungers 9, 10 on its facing the brake disc 1 installed in the end of the guide plate 28 or designed in such a way that acting on the slope, 7, 8 in parallel is poverhnosti friction brake disc support efforts are introduced into the guide plate 28 and discharged from it, depending on the direction of rotation of the brake disc, the guide surfaces 29 or 30 on the shield 31 of the brake mechanism.

Management of pressure plungers 9, 10, and managing slider 11 is carried out on them facing the brake disc 1 only through the end of the guide plate 28 and the shield 31 of the brake mechanism.

On the support plate 32 of the brake mechanism and the actuator 35, 36, 37 of the adjusting device, and the device offset caliper does not affect the district's efforts.

When this pressure plungers 9, 10 in the preferred embodiment, the simply screwed or pressed directly on the Cam plate 28.

Further, as an example describes the process of braking with disc brake mechanism:

In recognition of the intended braking by actuating the brake pedal and thereby connected with the brake pedal setting device of the brake mechanism, the brake cylinder 27 is supplied compressed air, so that the piston rod 26 moves.

The rotating lever 15 of the brake mechanism is rotated in its bearings 23, 24 rolling and moves thereby, and the axis of the eccentric 14, and thereby, the spherical bearing 13, in accordance with the transmission ratio of the lever, in the direction of the brake disc. Moving spherical od the market via the control slide or chain structural elements 12→13→17→16→11→33→34 passed on a pressure plate 4.

Push plate 4 at first to overcome the air gap by means of the brake pads 3 at right angles to its surface friction is moved to the brake disk 1. At the contact of the brake pads 3 with the friction surface of the brake disk 1 brake pad 3 and connected to it a push plate 4 due to the resulting friction fond of the brake disc 1 in the direction of its rotation.

The balls 5, 6 are held along the slopes 7, 8 and act on a pressure plate 4 in addition to its movement on the periphery as the device of the self, causing a more intense movement to the brake disk 1.

Entered by the Manager of the slide 11 force application increases and consequently increased brakes caliper 32 of the brake mechanism. Due to the offset on the periphery of the pressure plate 4, the control slide 11 carries out a rotary movement around the spherical bearing 13 and the bolt 33.

Located by the actuation of the brake pad 2, as typically occurs in brake mechanisms with sliding caliper, due to displacement of the brake caliper is attached to the brake disk 3. There should not be provided by any device of the self.

The brake cylinder 27 is made in this case as combined Tormos the second cylinder, with section 40 of the working brake and section 41 of the Parking brake.

Figure 2 explains on the basis of a comparison of the two housings 42 and 42' of the brake cylinders, the design of the clamping device 10 of the disc brake mechanism in the form samozrejme makes possible the use of the brake cylinder 42 of a smaller size than would be possible without the execution samozrejme (see brake cylinder 42').

The working section 40 of the brake cylinder is made as a membrane cylinder, having performed with the possibility of loading the compressed air space 43, and the loading of compressed air helps to ensure that through the membrane 44 and the plate 45 by the movement of the piston rod 26 acting on the end of the eccentric set of rotating lever 15 of the clamping device.

Further, in addition, on the basis of figol explained embodiment of a pneumatically driven disk brake mechanism with samozrejme.

As conditions of equilibrium in the x and y directions follow:

Fx=0=-FR+FLsin(α±γ)-ΔF(I )

Fy=0=FN+FLsin(α±γ)-FSp(II)

The angle γ is the angle of friction in a wedge-shaped slope (here in slope 7 or 8) and can be expressed by the ratio γarctan(µL) 1. In depending on the direction of motion of the brake linings of the friction angle has a different impact on the actual angle of the wedge. When moving the brake pads in the clamping device in a wedge-shaped friction slope counteracts this movement. Thus, the actual wedge angle compared to the angle γ of friction increases (the ability of the opposition of the wedge increases). In the direction of vacation this interaction has the opposite vector, i.e. the actual wedge angle compared to the angle of friction decreases the ability of the opposition of the wedge decreases).

For clamping the device is really, therefore, the following relationship:

αeff=α+γ,

and in the direction of leave

αeff=α-γ.

From condition (I) is ravnovesie follows:

FL+1sin(α±γ)(μFN+ΔF),

when filling in (II) we have:

ΔFFN=tan(α±γ)-μ-FSpFNtan(α±γ)(III).

During normal braking, the ratio ofΔFFN=0as Executive control (not shown here) fully justifies the difference of effort:

FN·(tan(α±γ)-µ).

Executive control can be performed so that can transfer efforts in the tangential (x)and perpendicular (y) direction.

When ABS-braking issue as quickly as possible reducing saimn is the first effort (F Nto prevent locking of the wheel. When considering the brake pads in pure form equation (III) can be rewritten as follows:

ΔFFN=tan(α-γ)-μ(IV)

The force Executive control is first ignored (i.e. FSp=0).

Final counteracting force of the wedge should quickly bring the pad to the free position, and quickly overcome the remaining force of Executive control (the resistance of the cylinder with the release of the air flow, the efficiency of the mechanics of the Executive control and inertia). On the basis of past experience we have the following relationship:

ΔFFN0,1

1. The disc brake mechanism is configured to pneumatic control that contains:
caliper (32) of the disc brake mechanism, at least one property of the clamp and one located on the side of the counter brake the loser is the second (2, 3) and the brake disc (1), and
at least one made with the possibility of loading the compressed air cylinder (27) as a power generator braking, which is intended to influence the clamping device to clamp the brake pads, which has a rotating lever (15) of the brake mechanism,
moreover, at least located on the side of the clip brake pad in the direction parallel to the axis of rotation of the brake disc and parallel to the friction surface of the brake disc, is arranged to move,
this is provided by the device of the self with the coefficient of the self, which is selected so that the brake mechanism after the brakes are automatically released, characterized in that the ratio of the self is less than or equal to 2.2.

2. The brake mechanism according to claim 1, characterized in that the device of the self is the coefficient of the self, which is chosen in such a way that the braking mechanism and the maximum possible coefficient of friction after the brakes are automatically released.

3. The brake mechanism according to claim 1, characterized in that the ratio of the self is less than or equal to 2.0.

4. The brake mechanism according to claim 1 or 2, characterized in that the rotating lever (15) of the brake mechanism is arranged to effect eposredstvenno or through an intermediate structural element, at least one integral or composite control slider (11), which directly or through a pressure plate (4) effect on the location of the clamp on the brake pad.

5. The brake mechanism according to claim 1 or 2, characterized in that the device of the self are connected in parallel to the control slider.

6. The brake mechanism according to claim 1 or 2, characterized in that it contains at least one adjusting device (18, 9; 19,10) to adjust the pad wear and/or disk.

7. The brake mechanism according to claim 1 or 2, characterized in that the control slide (11) can be rotated is mounted on the rotary lever (15) of the brake mechanism and a pressure plate (4) and on the side of the clip brake pad.

8. The brake mechanism according to claim 1 or 2, characterized in that the control slide (11) can be rotated is mounted on the rotary lever (15) of the brake mechanism and a pressure plate (4) and on the side of the clip brake pad with preferably intersecting the axis of rotation.

9. The brake mechanism according to claim 1 or 2, characterized in that the control slide (11) is installed and fixed on the axis (E) of rotation of the eccentric rotating the lever (15) of the brake mechanism and a pressure plate (4) or on the property of the clamp brake nakedc the (3) to align the rotary motion of the rotating lever (15) of the brake mechanism and movement offset on the periphery of the brake pads (3) and under certain conditions, a pressure plate (4) by turning in both perpendicular to each other, directions.

10. The brake mechanism according to claim 1 or 2, characterized in that the control slide (11) on both installation ends provided with a rotary support, in particular spherical sliding bearings, and power transmission as on the side of the rotating lever of the brake mechanism, and on the side of the pressure plate through the hinge pins and the hinge bolt of the rotating lever of the brake mechanism with respect to the hinge bolt pressure plate (4) is intersecting with the rotation axis.

11. The brake mechanism according to claim 1 or 2, characterized in that the control slide (10) is made axially varying in length, in particular in the form of a telescopic construction unit to compensate for wear of the linings and/or disk.

12. The brake mechanism according to claim 1 or 2, characterized in that the constructive node on the control slider for adjusting transmission of rotary motion through the clock drive is connected with an adjusting device (9, 18 10, 19).

13. The brake mechanism according to claim 1 or 2, characterized in that at least one rotary bearing on the axis of the eccentric rotating lever of the brake mechanism is in the form of a spherical bearing with boskoop the EIT rollers.



 

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The invention relates to the automotive industry and can be used in drum brake systems of vehicles

FIELD: transport.

SUBSTANCE: invention relates to disc brake. Propose brake comprises brake external clamp (1), brake shoe linings (2) to be pressed against brake disc, one being driven by brake lever (5) that turns about clamp cam pin. Brake rod (6) abuts on the clamp from end side, said rod being connected from opposite side to lining (2) from clamp side or to guide plate (9) connected therewith. It comprises two spaced apart pressure rods (4) located in one direction connected to clamp (1) and lining (2) or to guide plate (9), and self-booster. Clamp (1) has hemisphere-shaped bearing seats (13, 15) accommodating plain bearing elements (14, 16) fitted therein for brake lever (5) and pressure rod (4) to thrust by their side bent off lining (2) against clamp (1). Brake rod (6) is coupled with lining (2) and latch.

EFFECT: perfected simple design, lower costs, longer life and higher reliability.

7 cl, 4 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Proposed mechanism comprises support surrounding brake disc and brake linings abutting on brake disc on both sides. One of said linings on clap side can be actuated by clamp rotary lever. Disc brake support flange accommodates brake cylinder secured thereto to receive compressed air. Said cylinder can act on said rotary lever by cylinder rod and has return spring. Cylinder rod is displaced by spring back into free state to abut on the flange or on bottom resting on cover flange. Said flange makes the return spring support. Cover is made of thin-wall sheet of stable-shape metal foil. Concentric hole is made in said cover. In compliance with first version, brake mechanism cylinder has said cover makes form the preassembled assy without cylinder rod. In compliance with second version, brake mechanism cylinder return spring abut on thin-wall cover abuts on brake mechanism disc flange to made its support.

EFFECT: longer life.

17 cl, 5 dwg

Crank press brake // 2504474

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and may be used in crank press brakes. Said brakes serve to absorb energy of press clutch drive part after clutch is disengaged and to retain actuator jointly with drive part in position that corresponds to press slider to position. Brake comprises bearing, drive and pressure plates, pressure plate drive and cover. Drive is composed of modules. Every module comprises slider and end motor with inner and outer ring-like stators. Stators are mounted at press bed to get in magnetic contact with disc rotor. Rotor shaft is engaged via planetary reduction fear and torque converter with slider.

EFFECT: simplified design, accelerated operation.

2 dwg

Clamp brake // 2492373

FIELD: transport.

SUBSTANCE: clamp brake is mounted at vehicle comprising body and wheel with brake surface to braking force to be applied to said wheel. Clamp brake comprises brake shoe, brake shoe holder, main clamping body, two support pins and drive. Support pins hold said holder at main clamp body to allow its displacement toward brake surface and therefrom. Drive allows pressing brake shoe to wheel brake surface by aforesaid holder. Said drive comprises diaphragm, drive pressure chamber, piston and connected gear. The latter comprises screws and screw bores made in said piston to receive screws to be screwed in through holder to attach the piston thereto.

EFFECT: efficient conversion of fluid pressure into brake shoe pressing force, stable braking force.

10 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: annular disc brake includes a rotating disc and at least one disc shoe installed on each side of the rotating disc. Brake shoe or shoes on one side are connected to an axially guided load-carrying element of the brake shoe. The brake has a force transfer mechanism creating enhancement of increase in force between the axially driven element and load-carrying element. The method for increasing gripping force of brake shoe in annular disc brake consists in the fact that the first force is generated synchronously with the brake drive; at that, the first force has the direction that is parallel to rotation axis of the rotating disc. Also, rotating torque is generated using the first force; at that, rotating torque has the rotation centre that coincides with rotation axis of the rotating disc. Besides, the second force is generated using rotating torque; at that, the second force has the direction that is essentially identical to the direction of the first force and is higher than the first force. The second force is used for gripping of brake shoes on opposite sides of the rotating disc.

EFFECT: increasing brake compactness and providing uniform distribution of braking force in a circumferential direction of the rotating disc.

20 cl, 12 dwg

FIELD: mechanical engineering.

SUBSTANCE: modular brake mechanism mounted in the support provided with the port at least in its front side comprises braking lever, front rack that is connected with the braking lever when the brake operates, and at least one stop plate which is mounted on the transverse rack and overlaps the plate for closing the port in the front side of the support. The transverse rack moves by the lever in the plane virtually perpendicular to the plane of the brake disk. The brake mechanism is modular and comprises two or more units. At least one of the units has at least two members. Each of the units can be dismounted through the port in the support.

EFFECT: facilitated dismounting of out-worn units.

6 cl, 7 dwg

FIELD: mechanical engineering; disk brakes.

SUBSTANCE: proposed disk brake contains caliper enclosing brake disk and provided with cavity for mounting brake mechanism. Brake mechanism has support bracket installed inside in port in caliper wall furthest from brake disk. Brake mechanism is provided with adjuster, adjusting shaft and shaft for restoring initial position. Device is used to transmit motion between shafts to adjust and restore initial position. Adjuster is set into operation by pin of lever arranged on brake mechanism lever and is installed in support bracket at assembling.

EFFECT: improved synchronization of adjusting motion between two thrust units of brake mechanism, provision of compactness, facilitated servicing of brake mechanism.

10 cl, 8 dwg

FIELD: mechanical engineering; disk brakes.

SUBSTANCE: proposed disk brake contains caliper enclosing brake disk and provided with cavity for mounting brake mechanism. Brake mechanism has support bracket installed inside in port in caliper wall furthest from brake disk. Brake mechanism is provided with adjuster, adjusting shaft and shaft for restoring initial position. Device is used to transmit motion between shafts to adjust and restore initial position. Adjuster is set into operation by pin of lever arranged on brake mechanism lever and is installed in support bracket at assembling.

EFFECT: improved synchronization of adjusting motion between two thrust units of brake mechanism, provision of compactness, facilitated servicing of brake mechanism.

10 cl, 8 dwg

FIELD: mechanical engineering.

SUBSTANCE: modular brake mechanism mounted in the support provided with the port at least in its front side comprises braking lever, front rack that is connected with the braking lever when the brake operates, and at least one stop plate which is mounted on the transverse rack and overlaps the plate for closing the port in the front side of the support. The transverse rack moves by the lever in the plane virtually perpendicular to the plane of the brake disk. The brake mechanism is modular and comprises two or more units. At least one of the units has at least two members. Each of the units can be dismounted through the port in the support.

EFFECT: facilitated dismounting of out-worn units.

6 cl, 7 dwg

FIELD: machine building.

SUBSTANCE: annular disc brake includes a rotating disc and at least one disc shoe installed on each side of the rotating disc. Brake shoe or shoes on one side are connected to an axially guided load-carrying element of the brake shoe. The brake has a force transfer mechanism creating enhancement of increase in force between the axially driven element and load-carrying element. The method for increasing gripping force of brake shoe in annular disc brake consists in the fact that the first force is generated synchronously with the brake drive; at that, the first force has the direction that is parallel to rotation axis of the rotating disc. Also, rotating torque is generated using the first force; at that, rotating torque has the rotation centre that coincides with rotation axis of the rotating disc. Besides, the second force is generated using rotating torque; at that, the second force has the direction that is essentially identical to the direction of the first force and is higher than the first force. The second force is used for gripping of brake shoes on opposite sides of the rotating disc.

EFFECT: increasing brake compactness and providing uniform distribution of braking force in a circumferential direction of the rotating disc.

20 cl, 12 dwg

Clamp brake // 2492373

FIELD: transport.

SUBSTANCE: clamp brake is mounted at vehicle comprising body and wheel with brake surface to braking force to be applied to said wheel. Clamp brake comprises brake shoe, brake shoe holder, main clamping body, two support pins and drive. Support pins hold said holder at main clamp body to allow its displacement toward brake surface and therefrom. Drive allows pressing brake shoe to wheel brake surface by aforesaid holder. Said drive comprises diaphragm, drive pressure chamber, piston and connected gear. The latter comprises screws and screw bores made in said piston to receive screws to be screwed in through holder to attach the piston thereto.

EFFECT: efficient conversion of fluid pressure into brake shoe pressing force, stable braking force.

10 cl, 5 dwg

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