Compact disk brake block for railway vehicle

FIELD: transport.

SUBSTANCE: proposed disk brake block comprises two flanges with appropriate friction linings to allow friction against disk. Said flanges are articulated on ends of two levers driven by brake force source that comprises first piston displacing along first axis A. Brake block comprises also assembly to automatically control the gap between friction linings and said disk. First piston transmits braking force to pusher arranged inside aforesaid source to increase and transmit said force via said assembly and, along second axis B perpendicular to said first axis A, to ends of said levers perpendicular to those where said flanges are articulated with.

EFFECT: higher operating performances.

12 cl, 7 dwg

 

The present invention relates to integrated compact unit to generate the braking force, particularly intended for use on wheel pairs rail vehicle.

Known disk brake units of this type contain brake clamp containing a pair of cheeks, which are exposed to friction on the surface of the disk. In railway transport cheeks usually are driven by a pair of levers opposite the plane in which the disc, and these levers are driven by the source brake force, such as a pneumatic or hydraulic cylinder. Therefore provided a device for wear compensation or recovery of the gap, capable of maintaining a constant distance between the cheeks and the disk, tracking the change (decrease) the thickness of the brake pads due to wear, and not influenced by relative axial movement with respect to the carriage or frame which pair of wheels of the vehicle can perform while driving.

The modern trend of the main manufacturers of disc brakes of the type indicated above is to produce a very compact disk brake units that can be installed entirely on a wheeled cart or frame jelly is accessible vehicle so to be able to influence each corresponding brake disc, usually attached to the axis or to the wheel of the vehicle.

However, it is clear that as the size of the brake device is reduced, it also reduced and performance of the device, followed by the need to use complex and expensive accessories that can increase the braking force, which is sometimes separated from the pneumatic or hydraulic working cylinder.

Therefore, the aim of the present invention is to solve the problems associated with known devices, by developing compact blocks to generate the braking force, in particular for a railway transportation, able to provide high performance in normal driving conditions, in other words, during the term of the service brake, and in the stillness of the vehicle, i.e. when the unit is used as a Parking brake.

Another object of the invention is to create a compact disk brake unit for railway transport, able to autonomously perform many actions, namely the function of service brake and Parking brake, and to compensate for changes in distance between the pads and the brake disc, with reduced Chi is La detail as well as simplifying their manufacture in comparison with the known braking devices.

Another objective of the invention is to obtain a compact disk brake unit for railway vehicles, in which there is no need adding accessories to perform certain actions, such as increasing the braking force for the same volume of the working cylinder, or the prevention of unwanted actuation devices for the recovery of the gap.

Last but not least purpose of the present invention is to provide a compact disk brake unit for rail transport, which is extremely simple and cost-effective as in the manufacturing process, and when conducting its periodic maintenance.

These goals are in accordance with the present invention are achieved by providing a compact unit for creating a braking force, especially suitable for use on railway transport, which is described in paragraph 1 of the claims.

Other features of the invention are described in the following claims.

The characteristic features and advantages of the proposed compact unit to generate the braking force, in particular for a railway transportation or t is unsporty funds moving on rails, will become clearer from the following further description, given as a non limiting example with reference to the accompanying simplified drawings, in which:

Figa depicts a partial section of the proposed compact disk brake unit designed to perform the functions of both the service brake and Parking brake;

Figv depicts a partial section of the proposed compact disk brake unit, especially designed to perform the functions of only the service brake;

Figure 2 depicts a cross-section of the proposed compact disk brake unit, which illustrates a device for application of brake force to a pair of levers, one which made her cheeks and a device for recovery of the gap;

Figure 3 depicts in detail based on the first exemplary embodiment, the device for increasing the braking force, which is equipped with the proposed compact disk brake unit;

Figa depicts a partial section of a second exemplary variant of the proposed compact disk brake unit designed to perform the functions of both the service brake and Parking brake;

Figv depicts a partial section of a second variant example of implementation of the proposed comp is knogo disc brake unit, especially designed for operation as a working brake; and

Figure 5 depicts in detail based on the second variant example of implementation of a device for increasing the braking force, which is equipped with the proposed compact disk brake unit.

As shown, in particular on figa and 1B of the accompanying drawings, a preferred embodiment of a compact brake unit, generally designated by the number 10 position, is designed for disc brakes 12 of the vehicle designed to move on rails.

The unit 10 includes, firstly, a pair of cheeks 14, with corresponding friction linings 16 made with the possibility of friction on the two opposite surfaces of the disk 12, which can be installed on the axle or wheel of the vehicle. Cheeks 14 pivotally attached to the ends of the pair of levers 18, which, in turn, mounted to rotate on their respective hinges 20, permanently United with the main body unit 10, the levers are driven by the source 22 of the braking effort in this case is a pneumatic or hydraulic working cylinder.

The site, consisting of cheeks 14, the friction pads 16 and a pair of spaced opposite each other levers 18, forms a current brake clamp the proposed tormoznoy what about the block 10.

Pneumatic or hydraulic working cylinder 22 in an embodiment, which provides for the use of the proposed unit 10 as the service brake and Parking brake (Figa), is divided into two chambers separating element 24. The piston 26 for operating braking placed in one of the chambers, and the piston 28 to the Parking brake in the other, coaxially with the above-mentioned piston 26.

In accordance with a particularly preferred exemplary alternative implementation, a device that generates force for the Parking brake includes a spring 30 disposed between the piston 28 to the Parking brake and cover 32, while the node that transmits the force from the spring 30 to the piston 26 for operating braking, consists of driving a screw 34 with trapezoidal thread with a toothed cylinder, the axial bearing 36, the intermediate element 38, the locking lever 40, the cover 42 and the finger 44.

On the other hand, in the configuration, which provides only a working braking (Pigv), a working cylinder 22 is limited by the wall 46, and it is the only piston 26 for operating the brake.

In accordance with the invention, the pistons 26 and 28 act on the clamping device 48 to increase efforts created inside the working cylinder 22. Such a device, or soedinenii, illustrated on figa and 1B and, in detail, figure 3, based on his first variant example of implementation, in essence, contains the first lever 50, located perpendicular to the direction And movement of the pistons 26 and 28, on which a piston 26, leaning on him with an operating brake, and a pair of levers 52, pivotally United to their first ends 54 with the opposite ends of the lever 50.

In turn, each lever 52 is additionally pivotally connected to the second end 56 with one arm 58 of additional pairs of levers, and finally two lever 58 can be rotated around the respective finger 60 on the support plate 62 made integral with the main body of the working cylinder 22.

Therefore, a pair of levers 58 are made with the possibility of transmission of force transmitted by the piston, the piston 26 or 28, if present, on the clamping device 64, each of which is connected to the lever 58 with the corresponding finger 66.

Alternatively, the pushing lever connection 48, described above, can be used more easily by the pushing device 48', which uses a wedge with the same purpose. As shown in figa and 4B and, in more detail, figure 5, the clamping device 48' includes a wedge-shaped element 92, which runs essentially in the direction of a movement of the piston is 26, and 28, and on the base 94 which acts, resting in him, the piston 26 with an operating brake. Wedge-shaped element 92 operates in conjunction with a pair of bearings 96, located opposite each other on both sides of the axis A, pivotally connected to clamping devices 64 and in contact with the corresponding guide rails 98 made integral with the main body of the working cylinder 22.

Wedge-shaped element 92 passes and increases the force transmitted by the piston, the piston 26 or 28, if present, on bearings 96, and, successively, the clamping device 64.

The purpose of the clamping device 64 is in the transmission of the braking force generated inside the working cylinder 22, the brake clamp, in particular, on the ends of the levers 18, opposite to which is firmly attached cheeks 14.

In accordance with the invention, the node 68 to automatically adjust the clearance that is formed between the friction pads 16 and the brake disc 12, for example, due to wear of the pads 16, consists of two devices 70 for adjustment of the gap or expansion joints wear, located symmetrically relative to the longitudinal axis of the pistons 26 and 28 and has a capability to act in the direction of the axis perpendicular to the specified axis A.

Based on the illustrated exemplary embodiment, wypolnenii, in particular, figure 2 of the attached drawings, each device 70 to control the gap contains the element 76 with internal thread capable of perceiving the braking force of each of the clamping device 64, the screw 78 with trapezoidal thread, functionally connected with the element 76 and the corresponding lever 18, the axial bearing 72 and the elastic ring 74, coaxially with the clamping device 64 and element 76 and located between them, and a helical spring 80 which acts on each screw 78 with trapezoidal thread. The elements 76 with internal thread and an appropriate screw 78 with trapezoidal thread are interconnected multiple threads.

To be more precise, to change the clearance between the friction pads 16 and the brake disc 12, in accordance with particular applications, as will be explained below, each device 70 to control the gap staffed in part, reversed in direction to the Central axis A of the brake unit 10, the respective opposite each other retaining bushings 82 and 84, which are under the pressure of the coil spring 90, which is located in a compressed state between them, operate on the elements 76, resting on them.

The locking sleeve 82 and 84, moreover, connected with the adjusting screw 86 and the gear sleeve 88. Gear bushing 88 may be is used to regulate the distance M between the head of the adjusting screw 86 and the front part of one of the locking bushing 82, so this distance M may be set in accordance with the distance that it is desirable to maintain between the disk 12 and the friction pads 16 when the brake unit 10 in an unusable state.

Below with reference, in particular, exemplary embodiments of execution, shown in figa 4A and briefly described the operation of the brake unit 10, corresponding to the presented invention.

Force, resulting in the action of the service brake, is created by the influence of compressed air or, alternatively, under the pressure of the hydraulic fluid, which enters the portion of the working cylinder 22, which is designed for working braking, through the corresponding inlet opening (not shown). Air or hydraulic fluid acting on the piston 26 for operating the brake, which is moving forward within the cylinder 22 by pressing a lever 50 push connection 48 to increase the effort.

As shown in figure 3, the braking force transmitted by the piston 26 on the lever 50 is divided into two parts F, acting on the levers 52 and, consequently, with the help of two additional levers 58 this effort increases and is transmitted through the fingers 66 in the direction of the axis B (F1 figure 3)perpendicular to the axis of the above components of F, the clamping device 64.

In the exemplary embodiment depicted in figa, 4B and 5, the function of increasing the braking force, on the other hand, performs a wedge-shaped device 48'.

As shown in figa and 4B, the braking force transmitted by the piston 26 is wedge-shaped element 92, moves the latter along the axis A toward the bearings 96. Therefore, this wedge-shaped element 92 acts on the bearings 96, increasing the braking force at different times, depending on the angle of the wedge 92, ensuring its transmission through the reaction of the axial locking disk 100 bearings 96 in contact with the guides 98, made in one piece with the base plate of the working cylinder 22, the clamping device 64 in the direction of the axis (F1 figure 5), perpendicular to the direction A, along which moves the piston 26.

Then from the clamping device 64 is increased, the force is transmitted directly through the two devices 70 for the restoration and regulation of the clearance on the brake clamp and, ultimately, on the friction pads 16, which affect the disk 12.

When the unit 10 is also designed to perform the function of the Parking brake and contains the corresponding piston 28 (Figa), then he Parking brake is loaded through the inlet for compressed air or hydraulic fluid under pressure in the portion of the cylinder 22, intended for the Parking deceleration is and. Air or hydraulic fluid under pressure pushes the piston 28 to the Parking brake, which compresses the spring 30.

During this movement of the piston 28 causes the screw 34 with trapezoidal thread with a toothed cylinder, which is connected with the piston 28 through multiple threads, is driven into rotation. The screw 34 and the locking lever 40 is functionally form a unidirectional device that prevents rotation, so that when the lead screw 34 is rotated, a certain amount of his teeth kept locking lever 40.

The effort that operate the Parking brake, is created by spring 30 and occurs when the release of compressed air or pressurized hydraulic fluid through the corresponding outlet port (not shown) of the cylinder 22, intended for the Parking brake.

When the piston 28 to the brake moves from its original position, due to the unidirectional prevent rotation of the connection with the locking lever 40, the rotation of the screw 34 is prevented, so that the screw 34 and the piston 28 is functionally operate as one unit, and the screw 34 moves forward.

The screw 34 through the axial bearing 36 and the intermediate element 38 transmit the force on the piston 26 that is designed to work inhibition, leading t is thus in effect the Parking brake of the vehicle in the same way, as is the case for the above-described conventional brake.

Indeed, in this case, the braking force is also transmitted to the clamping device 48 or 48' for effort increase and it reaches the brake clamp directly through two opposite each other fixture 70 for the restoration and regulation of the gap.

In this regard, it should be noted that in both cases - and in the case of operating braking, and if the Parking brake, the braking force is always transmitted to the clamping device 48 or 48' to increase efforts exclusively through the piston 26 that is designed to work the brake.

When applying air or hydraulic fluid under pressure in the portion of the cylinder 22, intended for the Parking brake itself, the Parking brake can be fully turned off, thus bringing the vehicle to the normal movement.

Below with reference to figure 2 illustrates the operation of the node 68 to automatically adjust the gap, as in the case of a working brake and Parking brake.

The braking force, which clamping device 64 receives from the clamping device 48 or 48' to increase efforts in the direction of arrow S in figure 2. After application of force elements 76 with internal thread ka the Dogo device 70 begin to progressively move in the same direction. At the same time, under the action of the force of the spring 90 the locking sleeve 82 and 84 are also beginning to recede from one another.

At the same time, when the total distance M, which is the head of the adjusting bolt 86 is removed from the front of the locking sleeve 82 will be closed, or, in other words, when the contact between the bolt head 86 and the front part of the locking sleeve 82, then stop changing the distance between the two spaced against each other retaining bushings 82 and 84, so that when the clamping device 64 continue to move forward, the elements 76 devices 70 are rotated under the action of removal from the respective bushings 82 and 84.

Then, under the action of the effort of the springs 80, the screw 78 with trapezoidal thread protruding from the main body of the cylinder 22 in the direction of the axis (Figa), pushing levers 18 brake grip so that turn them on their hinges 20, bringing the cheeks 14 and the brake disc 12.

At that moment, when the friction pads 16 in contact with the brake disc 12, the screws 78 stop moving forward, the appropriate elements 76 again blocked and begins the actual process of braking.

The change of the gap that exists between the friction pads 16 and the brake disc 12 due to the rotation of the adjusting wines is and 86 rotates in the result, the toothed sleeve 88 during normal testing operations of the brake unit, resulting in a change in the distance of M and subsequently changes the size of the gap.

Thus, it is seen that the proposed compact unit to generate the braking force, in particular for a railway transportation, has achieved the above goals, passing itself the braking force is increased with the use of enforcement mechanisms, described above, directly to the two devices to restore the clearance connected with the brake engagement, the ends of which are friction pads that act on the disk.

An important advantage due to the use of two oppositely-located devices to restore the size of the gap is the fact that working independently, but being bound to each other by using simple elements, which create the possibility of their relative displacements in space, they are Autonomous compensate for lateral movement of the brake block is firmly connected to a pair of wheels or frame of the vehicle with respect to the brake disk mounted on the axle or on the wheel, and they do not need an additional device that is designed to prevent unwanted force application devices to restore the gap in the case of transverse movement of the truck during normal movement with what constituent of the vehicle. On the other hand, in the known brake blocks unwanted application of force by the device for recovery of the gap is prevented with the help of complex assemblies using mechanical shafts or switches.

Due to the presence of devices to increase efforts based on the use of levers or wedges, which give the possibility to reduce the effective area of the cylinder to which pressure air or hydraulic fluid can reduce the amount of cylinders themselves with obvious advantage in terms of compactness of the brake unit as a whole.

Thus, the simple and compact device that performs many functions with a reduced number of component parts, also making it easier to manufacture as compared with the known braking devices, as the internal system increase efforts consists of simple levers or wedges instead of complex mechanisms, based essentially on Cams or supported eccentrically.

Therefore, the invention aims at maintaining high performance and, at the same time, to reduce the cost of production and maintenance due to the presence of a smaller number of composite parts.

The proposed compact disk brake unit for vehicles, the motor is relating on rails designed, can be installed and connected in accordance with the requirements of the consumer, with all the devices that are commonly used in rail transport, such as manual or pneumatic disconnect Parking brake, anti-connecting valve (valve switch, which eliminates the simultaneous action of the service brake and Parking brake)sensor to indicate the status of the Parking brake and/or valve X (optional device for cylinders Parking brake, actuated by a spring, to prevent incorrect application of the Parking brake during movement of the vehicle caused by the lack of compressed the air in the chamber brake cylinder associated with a malfunction, for example, when torn pneumatic tube feeding).

The proposed compact disk brake unit for railway transport, done so in any case may have a large number of modifications and changes, all of which are within the scope of the invention.

Moreover, in practice the materials used and the dimensions of the parts and components can be any appropriate technical requirements.

1. The disc brake unit (10) for rail vehicles, sod is Rashi brake clamp, consisting of a pair of cheeks (14), which contain the respective friction pads (16), made with the possibility of friction on the two opposite surfaces of the disk (12), and are pivotally attached to the ends of a pair of levers (18)attached can be rotated on their respective hinges (20)fixedly attached to the main body of the brake block (10), the levers (18) are driven by source (22) brake force containing at least one first piston (26), which moves with the Commission reciprocating movement along the first axis (A), with the specified brake block (10) also contains a node (68) to automatically adjust the clearance between the friction lining (16) and the specified disk (12), with the specified piston (26) transmits the braking force pushing device (48; 48'), located within the specified source (22) brake force and intended to increase and transfer of the said efforts through the specified node (68) for automatic regulation of the gap and along the second axis (B)perpendicular to the specified first axis (A), the ends these levers (18), the opposite ends are hinged specified cheeks (14), characterized in that the node (68) for automatic regulation of gap contains two device (70) for reg is the regulation gap, located symmetrically with respect to the specified first axis (a) and configured to actuate in a direction specified second axis (B).

2. The brake block (10) according to claim 1, characterized in that the source (22) brake force comprises at least one second piston (28) for the Parking brake, coaxial with a first piston (26).

3. The brake block (10) according to claim 2, characterized in that the second piston (28) transmits the force providing the Parking brake, push the fixture (48; 48') through the first piston (26).

4. The brake block (10) according to claim 1, characterized in that the clamping device (48) contains the first lever (50)which is perpendicular to the specified first axis (A), and which, resting in him, acts specified piston (26), a pair of levers (52), pivotally attached by its first end (54) to the opposite ends of the lever (50)and second ends (56) - additional pair of levers (58), each of which transmits the braking force specified along the second axis (B) on the corresponding device (70) to control the gap.

5. The brake block (10) according to claim 4, characterized in that the levers (58) of the said pair of levers mounted to rotate with the respective fingers (60) on a support plate (62)is made integral with the main body of the criminal code of the connected source (22) braking effort.

6. The brake block (10) according to claim 4, characterized in that each of these levers (58) transmits the braking force to the corresponding device (70) for regulatory clearance by the clamping device (64)connected with the respective lever (58), using at least one finger (66).

7. The brake block (10) according to claim 1, characterized in that the clamping device (48') contains at least one element (92) in the form of a wedge, which runs essentially along this first axis (A)and the base (94) which, resting in him, acts specified piston (26), the element (92) in the form of a wedge interacts with at least one pair of bearings (96)located opposite each other relative to the specified first axis (a) and with corresponding axial locking discs (100)in contact with the corresponding guide rails (98), made integral with the main body of the source (22) of the braking effort to transfer the braking force specified along the second axis (B) to the appropriate device (70) to control the gap.

8. The brake block (10) according to claim 7, characterized in that each of these bearings (96) transmits the braking force to the corresponding device (70) for regulatory clearance by the clamping device (64)which can be rotated to set the len one of these bearings (96).

9. The brake block (10) according to claim 1, characterized in that each device (70) to control the gap contains an element (76) with internal thread located with the possibility of perception of the braking effort from the specified pushing device (48; 48'), screw (78) with trapezoidal thread, functionally attached to the specified element (76) with internal thread and the corresponding lever (18), and helical spring (80), which affects the specified screws (78) with trapezoidal thread.

10. The brake block (10) according to claim 9, characterized in that each device (70) for regulatory clearance in the portion facing to the said first axis (A)contains the respective opposite the locking sleeve (82, 84), which rest on these elements (76) with internal thread and which is pushed by a spring (90)located between them in a compressed state.

11. The brake block (10) of claim 10, wherein the locking sleeve (82, 84) are connected to each other by means of a regulating screw (86) and the gear sleeve (88).

12. The brake block (10) according to claim 11, characterized in that the toothed sleeve (88) is arranged to actuate for adjusting distance (M) between the head of the adjusting screw (86) and the front part of one of these locking sleeve (82), and a specified distance (M) can be set according to the accordance with the distance, which must be maintained between the specified disk (12) and a friction lining (16) when the brake block (10) at rest.



 

Same patents:

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SUBSTANCE: drive mechanism of disk brake of vehicle includes bracket consisting of case and cover, brake drive shaft and screw gear installed in bracket, and also lever mounted on external side of bracket on brake drive shaft. A mechanism of automatic control of the brake including a driving link is installed inside the lever. The driving link of automatic control of the brake is arranged coaxially to the brake drive shaft and is kinematically coupled with the bracket. A movable in circumferential direction packing is positioned between the bracket and a controller of the drive lever so, that internal cavities of the bracket and the lever form a common cavity sealed from the side opposite to the bracket.

EFFECT: simplification of design, raised maintainability and service life of mechanism of vehicle dick brake drive.

1 dwg

Modular disk brake // 2298712

FIELD: mechanical engineering, namely, disk brakes, having floating or sliding support.

SUBSTANCE: disk brake contains body for positioning braking mechanism on it and support, detachably connected to body. Disk brake is formed of various modules. Body acts as supporting means for fastening other modules. One of modules is formed by support together with at least three guiding fingers. Lid of braking mechanism is strongly connected to body. Seal is positioned and compressed during assembly between lid and body.

EFFECT: increased technical characteristics of disk brake.

18 cl, 7 dwg

Brake mechanism // 2292497

FIELD: mechanical engineering.

SUBSTANCE: brake mechanism comprises two pivotally interconnected levers and two opposite brake blocks secured to the levers for permitting periodical interaction with the rotating disk. The brake mechanism is provided with air-operated cylinder mounted at one of the ends of the lever so that its housing is secured to one of the levers and the rod is secured to the other lever. The brake blocks are mounted at the second end of the levers whose pivot joint is interposed between brake blocks and air-operated cylinder. One of the brake blocks is made of a current-carrying bus spring-loaded with respect to the lever for permitting connection with a power source. The levers are spring-loaded one with respect to the other by means of an extension springs interposed between the pivot joint of levers and air-operated cylinder. The rotating disk is made of two members whose bases are rigidly interconnected. One of the members is mounted for permitting contact with the current-carrying bus, is made of a conducting material, and is provided with a member for releasing voltage .

EFFECT: expanded functional capabilities.

2 dwg

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