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Railway disc brake with electrically isolated brake-shoe lining holder. RU patent 2505441.

IPC classes for russian patent Railway disc brake with electrically isolated brake-shoe lining holder. RU patent 2505441. (RU 2505441):

F16D65/095 -

F16D55/224 -

B61H5/00 - Applications or arrangements of brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes (self-applying brakes B61H0011020000; combinations of different types of brakes B61H0011140000)

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FIELD: transport.

SUBSTANCE: disc brake comprises disc and support. When actuated by brake lever, said support thrusts brake-shoe lining arranged at holder against brake disc. Brake lever and brake-shoe lining are articulated by hinge. Brake lever and brake-shoe lining are electrically isolated.

EFFECT: ruled out feed of inverse current from rail to car body.

16 cl, 7 dwg

This invention relates to a disk brake for the rail vehicle, containing the brake disc, and covering the disc brake caliper disk brake mechanism, which in the case of management by brake lever presses a button on the cradle brake lining brake pad to brake disc, brake lever and holder of the brake pads are connected using a swivel.

In rail vehicles with electric-driven phenomenon, known as «wandering currents», which consists in that the electric currents ground and mass flow through the almost unpredictable ways passage between the electrical constructive blocks or between parts of the car body. Often such «circulating currents» you can cope with work, even using sophisticated ground.

One possible cause for these «stray currents can be electric reverse currents, which in a moving train in the case of actuation of the disk brake can leak out of the rail to the wheel, and from there through the support of disk brake mechanism and the cart in front of the car.

In a standing motionless track vehicle also observed «wandering currents» in parallel road passed by another train.

«Wandering currents can create interference for those on Board, the rail vehicle electronic devices, so that they can issue error messages or even work properly. Due to this may deteriorate the security of the rail vehicle.

Especially large interference causing this phenomenon, in particular, the high-speed train. On the one hand, their car body is made of metal and is particularly well electrically conductive. On the other hand, the brake pads in a high-speed train in most cases are made of carbide, which is also a good conductor.

To prevent the spread of «stray currents» are trying to exclude in advance all possible for rail vehicle entry points and sources of interference.

To prevent electrical input reverse current of rail carriage moved on to the electric insulation caliper mounting disk brake mechanism on the trolley. However caliper disk brake mechanism of a greater mass, so that the isolation when driving subjected to high mechanical loads. This makes the execution of electrical insulation complex.

Efforts were also attempts to exclude path of current flow due to isolation of the brake pads. For this brake pad fixed on the holder brake lining using an electrically insulating adhesive bonding. However, because the adhesive during the braking process must withstand high temperature load, glued connection is complex.

The basis of this invention is to provide a disk brake for railway vehicles, which is maybe a more simple way is prevented from entering the electric reverse current with the rail car body.

Solution of this task is carried out by a disk brake with signs of paragraph 1 of the claims. Preferred embodiments of the invention defined in dependent claims.

Disc brake, according to the invention, characterized by the fact that between the brake lever and the holder of the brake lining formed electrical insulation. This has the advantage that the weight to be isolated structural element is relatively small. Regardless, the disc brake in the form of a compact disk caliper brake or in the form of a disk caliper brake with a pendant earrings, a holder of the brake linings, the weight of which is approximately 5 kg, it is easy compared with a caliper of disk brake mechanism, which has a mass of about 150-200 kg As subject to isolation constructive element has a relatively small mass, electrical insulation can be made cheaper. This is facilitated also by the fact that the electrical insulation removed from the friction surfaces of brake pads so that it is in the process of braking is less heating action. Due to this, the insulating material of the impact a lower temperature. Due to the insulating effect can be achieved with less cost. Another advantage of the invention consists in the fact that when the brake plate completely worn out and brake pad holder has the metal contact with the disk brake, remains stored insulating effect. The same applies to the loss of brake lining.

In a preferred embodiment of the invention swivel has one or more insulating parts, which are isolated from each other brake lever and holder of the brake pads. The isolation execution swivel for specialists in a given field of technology in principle there are various design possibilities.

In the simplest form, you can perform in such an arrangement to apply, for example, having a form of sleeve insulating parts.

Structurally, the preferred variant of execution in which swivel made in the form of rojalnoj loops.

Music loop can be made of the following structural elements:

- first articulated part, which is the first of the tabs, which are formed on the holder of the brake pads on the opposite brake lining side;

- the second hinge part, which has the second ledges, which are formed on the end-side brake lever;

- the first and the second ledge by each of the holes, which in the collected condition are located coaxially with each other, and in the holes of the first and/or second projections of the corresponding fixed bushing, which form the bearing sleeve for passing through her swivel rod.

To save a track vehicle isolation actions for a long time work, preferably, when separate parts of the hinge are located at a distance from each other. A simple way, this is due to the fact that on the front end of each sleeve is formed shoulder, which acts as a spacer between the hinge parts.

When this is the preferred layout, lying adjacent to one another sleeve facing each other his shoulder. Due to this opposition is insulation products abrasion disk brake. Electrical isolation between the brake lever and the holder of the brake pad is retained after a long time of work. This is of particular advantage, in particular, the high-speed train, which abrasion product can be electrically conductive.

Mounting sleeve in this ledge can be done in a simple way, with the help of press fits.

As a material for sleeve or insulating washers can serve polymer materials and/or ceramic materials.

Preferable for production is, in particular, resistant to temperature plastic. This material can be, for example, polyamide or PTFE. Such materials are known under the brand name Kapton® and PTFE DuPont. They are able to withstand a temperature of 280 degrees C, respectively, to 350 degrees C.

The preferred embodiment of the invention, in which the holder of the brake pad is suspended on a cart rail vehicle through the second swivel with the help of a construction with hanging earrings, characterized by the fact that also the second swivel performed electrically insulating. This provides that also at this construction with pendant earrings interrupted path of current flow between the rail and the body of the car. Such a disk caliper brake with a pendant earrings has the advantage that the braking force is transmitted almost exclusively through pendant earrings in the bogie frame. Due to this decrease the load on the brake lever. According to the invention, in this design the holder brake pads should also electrically separated from the truck. Thus, the way of passing current input reverse current is interrupted in this case.

Preferred relative to manufacturing execution disk caliper brake with a pendant earrings may be such that for swivel between the brake pad and structure with pendant earrings again apply insulating sleeve, respectively, insulating washers.

Regardless of whether the disc brake construction in the form of a compact disk caliper brake or in the form of a disk caliper brake with a pendant earrings, a significant advantage of the invention consists in that the brake lining and/or holder of the brake pads can easily be replaced without the need of exposure to the entire disk brakes acceptance with security. Such a departmental admission is always challenging. Another significant advantage is that you can easily outfit already in operation of disc brake.

For further explanation of the invention is described below, from which follows the preferred embodiments, the details and modification of the invention with reference to the accompanying drawings, which shows:

figure 1 - the first example of the execution of the invention, the disc brake is designed as a compact disk caliper brake, and electrical insulation is made between made in the form of a hinge hinge parts that connect the brake pad holder with the brake lever;

figure 2 - the holder of the brake lining with located, according to invention, insulating sleeves, the top view;

figure 3 - partial incision holder brake lining according to figure 2, on the side;

figure 4 - the incision swivel between the brake pad and brake lever on a larger scale;

figure 5 - another example of the execution of the invention, the disc brake is in the form of disk caliper brake with a hanging earrings, and the holder brake pad is connected with a cart with H-shaped pendant design;

6 is another option to perform disk caliper brake with a pendant earrings, a holder of the brake pad is connected with the cart using I-shaped pendant design;

Fig.7 - another option to perform disk caliper brake with a hanging earrings, the holder brake pad is connected with a cart with a Y-shaped pendant design.

Figure 1 shows the isometric projection disc brake 1, according to the invention, for rail vehicle. Caliper 9 disk brake mechanism is fixed with screws on the chassis frame. Caliper 9 disk brake mechanism has tensioner 10, which in the case of actuate the brake disk 1 with brake lever 11 affects the holder 4 brake lining and pulls due to this, brake pad 3 to brake disc 5. The connection between the brake lever 11 and the holder of 4 brake lining is done using a swivel 7. This swivel 7 is in the form of rojalnoj loops. As follows from the description given below in relation to the figure 4, the music loop 7 essentially consists of a hinged rod 6, which goes through the hole in ledges 12, respectively, 13 and is based in them. The tabs 12 formed on the cradle 4 brake lining and the bulge 13 - on the brake lever 11.

In the example, run each of the projections of 12 forms a mounting bracket for the sleeve 2. Sleeve 2 made from plastic. This isolation between the brake lever 11 and the holder of 4 brake pad is relatively simple, since the mass of the brake pad 3 and holder 4 brake linings (about 4 kg) is much less than the mass of the caliper 9 disk brake mechanism (approximately 150 kg).

Mount bushings 2 in the hole hanging 12 is carried out by means of press fit (however, it is also possible that the insulating sleeve 2 press fit in the holes prominences 13).

Figure 4 shows separately holder 4 brake pads on top, figure 3 holder 4 brake pad is shown on the side. According to the invention, between articulate the core of 6 (see figure 4) and the holder of 4 brake lining is made insulation in the form of sleeves 2. Each Bush 2 has shoulder 14 (see figure 3). Sleeve 2 held a press fit in the hole in the ledge of 12. The holes are aligned along the axis 8. Every ledge 12 forms a mounting bracket for the sleeve 2. The location of the selected so that in lying adjacent to each other bushings 2 proper sleeves 2 are opposite to each other by their 14.

Figure 4 shows in the context of scaled-swivel between the brake lever 11 and the holder of 4 brake lining. Joint 7 is, as mentioned above, on the merits of the rod 6, which is installed in the insulating sleeves 2 in bulges 12 holder 4 brake lining. Between adjacent ribs 12 is appropriate ledge 13 brake lever 11. Between the lip 13 and tabs 12 is in the axial direction gap 15, whose width is determined by the shoulder 14 sleeve 12. This ensures that even after a long operation time deposits products abrasion not lead to electrical insulation in the gap of 15.

In figure 5, 6, 7 shows the options for the execution of the invention, in which the holder 4 brake lining further blended with the help of a construction 24, 25, 26 with pendant earrings with a cart 28. The disc brake such a design of the braking force is almost entirely directed through the design of 24, 25, 26 with pendant earrings in the bogie frame 28. Mount the disc brake caliper mechanism must accept essentially only own weight and residual brake moments efforts.

In shown in figure 5 the embodiment of the pendant earrings are adjacent to the holder of brake linings from the outside, so that the electrical insulation can be done in a simple way, with the sleeves 22 with the shoulder.

In shown in Fig.6 variant of execution on the basis of the screws on the outer end of the lying horizontally pin swivel 27 requires outside corresponding insulating washer 23.

In shown in Fig.7 Y-shaped design 26 with pendant earrings also provides lying outside insulating washer 23.

Insulating effect between the holder of 4 brake lining and corresponding construction of 24, 25, 26 with drop earrings can be made, of course, also by the insulating sleeves and insulating washers.

With disc brakes, according to the invention, in a compact design caliper disk brake mechanism and construction caliper disk brake mechanism with pendant earrings effectively prevent the entrance of the reverse currents, so that «stray currents» can spread less strongly.

Another great advantage of the invention is that you can simply reequipment of operating disc brakes. Complicated acceptance confirmation of safety is not required, since there are already committed brake linings.

An additional advantage is that even with a strong suppression of brake lining remains an insulating effect even when the brake lining wear out below the admissible amount of wear and tear.

List of positions

1 Disc brake

2 Bush, isolating a part of the

3 Brake lining

4 brake pad Holder

5 disk Brake

6 Pivot rod finger

7 Swivel 8 Axis

9 disk Caliper brake

10 tensioner

11 Brake lever

12 Ledge on 4

13 Ledge on 11

14 Shoulder

15 Gap

22 Sleeve design with pendant earrings

23 Insulating washer

24 H-shaped design with pendant earrings

25 I-shaped design with pendant earrings

26 Y-shaped design with pendant earrings

27 Second swivel

28-Cart.

1. Disk brake for the rail vehicle, containing: - brake disc (5), - covering brake disc (5) the support (9) of disk brake mechanism, which in the case of actuation using the brake lever (11) pushes the button on the cradle (4) brake lining brake pad (3) to the brake disc (5), the brake lever (11) and holder (4) brake pads are connected using a swivel (7), wherein the brake lever (11) and holder (4) brake pads are made of electrically isolated from each other.

2. Disc brake according to claim 1, wherein the swivel (7) has at least one isolating part, which is electrically parts brake lever (11) and holder (4) brake lining.

3. Disc brake according to claim 2, characterized in that at least one insulating part is made in the form of sleeve (2).

4. Disc brake of claim 3, wherein the swivel (7) is in the form of rojalnoj loops.

5. Disc brake according to claim 4, wherein the music loop contains: - the first part of the hinge, which is the first tabs (12), which are formed on the holder (4) brake pads facing the brake linings (3) the party; - the second part of the hinge, which has the second tabs (13), which are formed on the terminal side of the brake lever (11); - the first and the second shoulder (12, 13) has holes, which in the collected condition are located coaxially with each other, and in the holes of the first and/or second projections (12, 13) belongs to the corresponding Bush (2), which form the bearing sleeve for passing through her swivel rod (6).

6. Disc brake according to claim 5, wherein each sleeve (2) on the front end has a shoulder (14).

7. Disc brake of claim 6, wherein the sleeve (2) in lying adjacent to one another ledges (12) are located opposite each other their shoulder (14).

8. Disc brake on item 4 or 6, wherein the mounting sleeve (2) in the hole of the first or second ledge (12, 13) by using the press fit.

9. Disc brake of claim 3, wherein each sleeve (2) is made of a polymeric material.

10. Disc brake of claim 3, wherein each sleeve (2) is made of ceramic material.

11. Disc brake of claim 9, or 10, wherein each sleeve (2) has a wall thickness of more than 2 mm

12. Disc brake of claim 6, wherein the shoulder (14) sleeve (2) has an axial larger width 2 mm

13. Disc brake of claim 9, wherein the Bush (2) is made of polyamide or PTFE.

14. Disc brake according to claim 1, wherein the holder (4) brake pad is mounted on the truck (28) the rail vehicle using a second swivel (27) and construction (24, 25, 26) with hanging earrings, between the holder (4) brake lining and design (24, 25, 26) with drop earrings executed electrical insulation.

15. Disc brake on paragraph 14, wherein the electrical insulation between the holder (4) brake lining and design (24, 25, 26) with drop earrings formed by the Bush (22), which is made of an insulating material.

16. Disc brake on item 15, wherein the second swivel (27) is in the form of rojalnoj loops.