Lever assembly for bogie foundation braking device, bogie foundation braking device and bogie

Abstract

The utility model discloses a lever assembly for a bogie foundation braking device, the bogie foundation braking device and a bogie. The lever assembly comprises a movable lever assembly and a fixed lever assembly; the moving lever assembly comprises a moving lever and a first bushing; three first holes are formed in the floating lever at intervals; each first bushing comprises two first flange bushings, and the two first flange bushings are symmetrically embedded into the corresponding first holes; each first bushing is in interference fit with the corresponding first hole; the fixed lever assembly comprises a fixed lever and a second bushing; three second holes are formed in the fixed lever at intervals; each second bushing comprises two second flange bushings, and the two second flange bushings are symmetrically embedded into the corresponding second holes; each second bushing is in interference fit with the corresponding second hole; the moving lever assembly is connected with one end of the middle pull rod, and the fixed lever assembly is connected with the other end of the middle pull rod. The lever assembly can reduce frictional resistance.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lever composition for bogie foundation brake device, bogie foundation brake device and bogie. BACKGROUND

[0002] The lever is widely used in mechanical transmission and plays an important role in force transmission. The swing lever composition and the fixed lever composition are used in the bogie of the railway freight car, and the two are mechanical lever components, which play a role in force transmission and amplification in the brake device of the railway freight car. In the braking process, the thrust generated by the brake cylinder in the vehicle is transmitted to the brake shoe through the brake push rod, so that the brake shoe is in close contact with the tread of the wheel, friction force is generated, so that the wheel slows down or stops rotating. The fixed lever plays a supporting and guiding role in the whole process, ensuring that the swing lever can rotate in the predetermined direction and accurately transmitting the force to each brake component.

[0003] At present, the bushings in the swing and fixed levers used in the bogie are all ADI bushings for locomotive vehicles, without flanges, and the one end of the bushing is flush with the lever, and the other end is 0-2mm lower than the lever plane. In the vehicle braking process, the swing and fixed levers have a large contact surface with the brake beam support and the center pull rod, generating a large friction force, which is prone to problems of poor brake release and insufficient braking force. SUMMARY

[0004] Therefore, one purpose of the utility model is to provide a lever composition for bogie foundation brake device, which can reduce the friction resistance between parts and effectively solve the problems of insufficient braking force and poor brake release. Another purpose of the utility model is to provide a bogie foundation brake device. Another purpose of the utility model is to provide a bogie.

[0005] The utility model adopts the following technical scheme to achieve the above purpose.

[0006] On the one hand, the utility model provides a lever composition for bogie foundation brake device, which comprises a swing lever composition and a fixed lever composition.

[0007] The swing lever composition comprises a swing lever and a first bushing. The swing lever is provided with three first holes along its length direction. The first bushing is provided with three. Each first bushing comprises two first flange bushings, which are symmetrically embedded in the corresponding first hole, and the first outer extension edge of the first flange bushing is located outside the first hole. Each first bushing and the corresponding first hole are in interference fit.

[0008] The fixed lever assembly comprises a fixed lever and second bushings; the fixed lever is provided with three second holes along the length direction thereof; the second bushings are provided in three; each of the second bushings comprises two second flange bushings which are symmetrically embedded into the corresponding second hole, and the second flange bushing is provided with a second outer extension which is located outside the second hole; the second bushing and the corresponding second hole are in interference fit;

[0009] The movable lever assembly is connected with one end of the middle pull rod through a first pull rivet which penetrates the first bushing located in the middle; the fixed lever assembly is connected with the other end of the middle pull rod through a third pull rivet which penetrates the second bushing located in the middle. Such lever assembly can reduce the frictional resistance between the lever and the middle pull rod, the brake beam support and other components, and effectively solve the problems of insufficient braking force and poor braking release.

[0010] The inventor finds that the two first flange bushings are symmetrically embedded into the corresponding first hole of the movable lever to form the interference fit, and the outer extension of the first flange bushing is located outside the first hole, so that the frictional resistance between the movable lever and the components connected therewith (such as the middle pull rod, the pull rod and the like) can be reduced. Similarly, the two second flange bushings are symmetrically embedded into the corresponding second hole of the fixed lever to form the interference fit, and the outer extension of the second flange bushing is located outside the second hole, so that the frictional resistance between the fixed lever and the components connected therewith (such as the middle pull rod, the chain ring and the like) can be reduced.

[0011] The first flange bushing and the second flange bushing can be steel flange bushings, for example, can be formed of 45# steel.

[0012] Specifically, the first flange bushing has a first bushing body connected therewith and a first outer extension, the first bushing body is in a cylindrical structure, the first outer extension is in a circular ring structure, and the outer diameter of the first outer extension is greater than the outer diameter of the first bushing body. The second flange bushing has the same shape as the first flange bushing.

[0013] According to the lever assembly for the bogie foundation brake device, preferably, the sum of the axial lengths of the two first flange bushings is less than the axial length of the first hole; and the sum of the axial lengths of the two second flange bushings is less than the axial length of the second hole. In this way, the friction between the two flange bushings can be avoided.

[0014] According to the lever assembly for the bogie foundation brake device, preferably, the three first holes are a first hole A, a first hole B and a first hole C respectively; the first hole A is located at one end of the movable lever, the first hole C is located at the other end of the movable lever, the first hole B is located between the first hole A and the first hole C, and the first hole B is close to the first hole A.

[0015] In the utility model, two first flange bushings of interference fit with first hole A are two first flange bushings A. Two first flange bushings of interference fit with first hole B are two first flange bushings B. Two first flange bushings of interference fit with first hole C are two first flange bushings C.

[0016] According to the utility model discloses a lever composition for bogie foundation brake device, preferably, the central axis of first hole B and the central axis of first hole C are parallel, the central axis of first hole A and the central axis of first hole B are not parallel, and have intersection between both.

[0017] In certain embodiments, the central axis of first hole A, the central axis of first hole B and the central axis of first hole C are parallel, that is, the floating lever is flat plate structure. In other embodiments, the central axis of first hole B and the central axis of first hole C are parallel, the central axis of first hole A and the central axis of first hole B are not parallel, and have intersection between both, that is, the floating lever is the structure with certain bending angle.

[0018] According to the utility model discloses a lever composition for bogie foundation brake device, preferably, the diameter of first hole B is greater than or equal to the diameter of first hole A, and the diameter of first hole B is greater than the diameter of first hole C.

[0019] According to the utility model discloses a lever composition for bogie foundation brake device, preferably, three second holes are second hole E, second hole F and second hole G respectively, wherein, second hole E is located at one end of fixed lever, second hole G is located at the other end of fixed lever, second hole F is located between second hole E and second hole G, and second hole F is close to second hole E.

[0020] According to the utility model discloses a lever composition for bogie foundation brake device, preferably, the central axis of second hole F and the central axis of second hole G are parallel, the central axis of second hole E and the central axis of second hole F are not parallel, and have intersection between both.

[0021] In certain embodiments, the central axis of second hole E, the central axis of second hole F and the central axis of second hole G are parallel, that is, the fixed lever is flat plate structure. In other embodiments, the central axis of second hole F and the central axis of second hole G are parallel, the central axis of second hole E and the central axis of second hole F are not parallel, and have intersection between both, that is, the fixed lever is the structure with certain bending angle.

[0022] According to the utility model discloses a lever composition for bogie foundation brake device, preferably, the diameter of second hole F is greater than or equal to the diameter of second hole E, and the diameter of second hole F is greater than the diameter of second hole G.

[0023] In another aspect, the application also provides a bogie foundation brake device, comprising a middle pull rod, a first brake beam support, a second brake beam support, a pull rod, a chain ring, a pull rivet pin, a round pin and a lever assembly for the bogie foundation brake device as described above;

[0024] The round pin comprises a first round pin and a second round pin;

[0025] The first round pin is arranged to pass through a first bushing at one end and an end of the pull rod, so that the pull rod is connected with the movable lever assembly through the first round pin;

[0026] The pull rivet pin comprises a first pull rivet pin, a second pull rivet pin, a third pull rivet pin and a fourth pull rivet pin; the first pull rivet pin is arranged to pass through a first bushing at the middle and an end of the middle pull rod, so that the middle pull rod is connected with the movable lever assembly; the second pull rivet pin is arranged to pass through a first bushing at the other end and the first brake beam support, so that the movable lever assembly is connected with the first brake beam support;

[0027] The second round pin is arranged to pass through a second bushing at one end and an end of the chain ring, so that the chain ring is connected with the fixed lever assembly through the second round pin;

[0028] The third pull rivet pin is arranged to pass through a second bushing at the middle and the other end of the middle pull rod, so that the middle pull rod is connected with the fixed lever assembly; the fourth pull rivet pin is arranged to pass through a second bushing at the other end and the second brake beam support, so that the fixed lever assembly is connected with the second brake beam support.

[0029] In the bogie foundation brake device, the lever assembly of the application is adopted, so that the friction between the lever assembly and the parts connected with the lever assembly is reduced. The other detailed structure of the bogie foundation brake device can refer to the prior art, and will not be described here.

[0030] In another aspect, the application also provides a bogie, comprising the bogie foundation brake device as described above.

[0031] The lever assembly for the bogie foundation brake device of the application can reduce the frictional resistance between the lever and the middle pull rod, the brake beam support and other parts, and effectively solve the problems of insufficient braking force and poor braking and releasing. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a side view schematic diagram of the movable lever assembly of the application.

[0033] Figure 2 It is a top view schematic diagram of the movable lever of the application.

[0034] Figure 3 It is the side view schematic diagram of the first flange bushing of the utility model.

[0035] Figure 4 It is the partial structure schematic diagram of the bogie foundation brake device.

[0036] Figure 5 It is the structure schematic diagram of the bogie.

[0037] The sign of the reference numeral is explained as follows:

[0038] 10-floating lever assembly, 11-floating lever, 111-first hole A, 112-first hole B, 113-first hole C, 12-first bushing, 121-first flange bushing.

[0039] 21-fixed lever; 31-middle pull rod, 32-pull rod, 33-first brake beam support, 34-link, 35-second brake beam support;

[0040] 41-wheel axle, 42-side frame, 43-spring and damping device, 44-swing bolster. DETAILED DESCRIPTION

[0041] The utility model will be further explained in combination with specific embodiment, but the protection scope of the utility model is not limited to this.

[0042] Example 1

[0043] Figure 1 It is the side view schematic diagram of the floating lever assembly of the utility model. Figure 2 It is the top view schematic diagram of the floating lever of the utility model. Figure 3 It is the side view schematic diagram of the first flange bushing of the utility model. Figure 4 It is the partial structure schematic diagram of the bogie foundation brake device.

[0044] The embodiment provides a lever assembly for bogie foundation brake device, including floating lever assembly 10 and fixed lever assembly.

[0045] As shown in Figure 1 , Figure 2 and Figure 3 , floating lever assembly 10 includes floating lever 11 and first bushing 12.The both ends of floating lever 11 are arc-shaped.Three first holes are arranged on the length direction of floating lever 11.Three first bushings 12 are arranged.The first bushing 12 includes two first flange bushings 121, and the two first flange bushings 121 are symmetrically embedded in the corresponding first hole.The first extension edge of first flange bushing 121 is located outside the first hole.The first bushing 12 and the corresponding first hole are in interference fit.

[0046] Specifically, as shown in Figure 3 The first flange bushing 121 has a first bushing body and a first extended edge connected thereto, and the outer diameter of the first extended edge is greater than the outer diameter of the first bushing body. Most of the first bushing body is embedded in the corresponding first hole, the first extended edge is located outside the first hole, and the outer diameter of the first extended edge is greater than the diameter of the first hole.

[0047] The sum of the axial lengths of the two first flange bushings 121 is less than the axial length of the corresponding first hole.

[0048] In this embodiment, as shown in Figure 2 The three first holes are first hole A 111, first hole B 112, and first hole C 113, respectively. Among them, the first hole A 111 is located at one end of the floating lever 11, the first hole C 113 is located at the other end of the floating lever 11, the first hole B 112 is located between the first hole A 111 and the first hole C 113, and the first hole B 112 is close to the first hole A 111. The diameter of the first hole B 112 is greater than or equal to the diameter of the first hole A 111. The diameter of the first hole B 112 is greater than the diameter of the first hole C 113. As shown in Figure 1 The center axis of the first hole B 112 and the center axis of the first hole C 113 are parallel. The center axis of the first hole A 111 and the center axis of the first hole B 112 are not parallel, and have an intersection point therebetween.

[0049] In this embodiment, specifically, the two first flange bushings 121 that are interference-fitted with the first hole A 111 are two first flange bushings A. The two first flange bushings 121 that are interference-fitted with the first hole B 112 are two first flange bushings B. The two first flange bushings 121 that are interference-fitted with the first hole C 113 are two first flange bushings C.

[0050] As shown in Figure 4 The fixed lever assembly includes a fixed lever 21 and second bushings. The shape of the fixed lever 21 is substantially the same as that of the floating lever 11, and the length and width of the fixed lever 21 are slightly smaller than those of the floating lever 11. The fixed lever 21 is provided with three second holes in the length direction thereof. The second bushings are provided in three. Each second bushing includes two second flange bushings, and the two second flange bushings are symmetrically embedded in the corresponding second hole. The second extended edge of the second flange bushing is located outside the second hole. Each second bushing and the corresponding second hole are interference-fitted.

[0051] Specifically, the second flange bushing and the first flange bushing 121 are identical in shape. The second flange bushing has a second bushing body and a second extended edge connected thereto, and the outer diameter of the second extended edge is greater than the outer diameter of the second bushing body. Most of the second bushing body is embedded in the corresponding second hole, and the second extended edge is located outside the second hole, and the outer diameter of the second extended edge is greater than the diameter of the second hole.

[0052] The sum of the axial lengths of the two second flange bushings is less than the axial length of the second hole.

[0053] In this embodiment, the three second holes are respectively the second hole E, the second hole F and the second hole G. Among them, the second hole E is located at one end of the fixed lever 21, the second hole G is located at the other end of the fixed lever 21, and the second hole F is located between the second hole E and the second hole G, and the second hole F is close to the second hole E. The diameter of the second hole F is greater than or equal to the diameter of the second hole E. The diameter of the second hole F is greater than the diameter of the second hole G. The central axis of the second hole F and the central axis of the second hole G are parallel. The central axis of the second hole E and the central axis of the second hole F are not parallel, and have an intersection therebetween.

[0054] The movable lever assembly and the fixed lever assembly are connected by the middle pull rod 31. Specifically, the first pull rivet pin penetrates the middle first bushing 12 and one end of the middle pull rod 31, so that the middle pull rod 31 is connected with the movable lever assembly 10. The third pull rivet pin penetrates the middle second bushing and the other end of the middle pull rod 31, so that the middle pull rod 31 is connected with the fixed lever assembly.

[0055] More specifically, both ends of the middle pull rod 31 have a clamping plate opening part, the clamping plate opening part has an opening space, the clamping plate opening part is U-shaped, and the clamping plate opening part has upper and lower clamping plates, and the upper and lower clamping plates are respectively provided with holes. The hole of one end of the middle pull rod 31 can be used for the first pull rivet pin to pass through, and the hole of the other end can be used for the third pull rivet pin to pass through. The movable lever 11 and the fixed lever 21 both horizontally pass through the opening space of the clamping plate opening part and are located between the upper and lower clamping plates respectively.

[0056] In this embodiment, the material of the first flange bushing 121 and the second flange bushing is 45# steel.

[0057] The lever assembly of the present embodiment is beneficial to reduce the contact area between the movable lever 11, the fixed lever 21 and the middle pull rod 31, and reduce the frictional resistance therebetween. It is also beneficial to reduce the contact area between the movable lever 11 and the first brake beam support 33 and the pull rod 32, and reduce the frictional resistance therebetween. It is also beneficial to reduce the contact area between the fixed lever 21 and the second brake beam support 35 and the chain ring 34, and reduce the frictional resistance therebetween.

[0058] Example 2

[0059] Figure 4 Figure 1 is a schematic view of a part structure of a bogie foundation brake device. Figure 5 Figure 2 is a schematic view of a bogie structure.

[0060] As shown in Figure 4 Figure 1, the embodiment provides a bogie foundation brake device, which comprises a middle pull rod 31, a pull rod 32, a first brake beam support 33, a chain ring 34, a second brake beam support 35, a pull rivet pin, a round pin, and the lever assembly for the bogie foundation brake device described in the embodiment 1.

[0061] The round pin comprises a first round pin and a second round pin. The first round pin is arranged to pass through the first bushing 12 at one end of the floating lever assembly 10 (i.e. the first bushing 12 in the first hole C 113) and the end of the pull rod 32, so that the pull rod 32 is connected to the floating lever assembly 10 through the first round pin. Specifically, the end of the pull rod 32 connected to the floating lever assembly 10 has a clamp opening part, the clamp opening part has an opening space, the clamp opening part is in a U shape, and the clamp opening part has upper and lower clamps, and the upper and lower clamps are respectively provided with holes. The one end of the floating lever assembly 10 is located between the clamp opening parts of the pull rod 32, and the first round pin passes through the upper clamp of the pull rod 32, the first bushing 12, and the lower clamp of the pull rod 32 in sequence. The other end of the pull rod 32 is connected to the first brake beam (also referred to as the left brake beam).

[0062] The pull rivet pin comprises a first pull rivet pin, a second pull rivet pin, a third pull rivet pin, and a fourth pull rivet pin.

[0063] The first pull rivet pin is arranged to pass through the first bushing 12 at the middle (i.e. the first bushing 12 in the first hole B 112) and one end of the middle pull rod 31, so that the middle pull rod 31 is connected to the floating lever assembly 10. The second pull rivet pin is arranged to pass through the first bushing 12 at the other end (i.e. the first bushing 12 in the first hole A 111) and the first brake beam support 33, so that the floating lever assembly 10 is connected to the first brake beam support 33.

[0064] The second round pin is arranged to pass through the second bushing at one end and the end of the chain ring 34, so that the chain ring 34 is connected to the fixed lever assembly through the second round pin. As shown in Figure 5 , the other end of the chain ring 34 is connected to the bolster 44 through a fulcrum.

[0065] The third pull rivet pin is arranged to pass through the second bushing at the middle and the other end of the middle pull rod 31, so that the middle pull rod 31 is connected to the fixed lever assembly.

[0066] The fourth pull rivet pin is arranged to pass through the second bushing at the other end and the second brake beam support 35, so that the fixed lever assembly is connected to the second brake beam support 35.

[0067] The bogie foundation brake device of the embodiment can reduce the friction between the lever assembly and the parts connected thereto, and other detailed structures of the bogie foundation brake device can refer to the prior art, and only part of the description is given herein.

[0068] Example 3

[0069] As shown in Figure 5 The embodiment provides a bogie which comprises the bogie foundation brake device of the embodiment 2 and further comprises an axle 41, a side frame 42, a spring and damping device 43, a bolster 44, an elastic side bearing (not shown), an axle box rubber pad (not shown), a load bearing saddle (not shown) and a nylon core disc wear plate (not shown). The two ends of the side frame 42 are supported on the two axles 41 by means of the axle box rubber pads and the load bearing saddles, the bolster 44 is placed on the central square spring support of the side frame 42 by the spring and damping device 43, and a series of axle box rubber pads are arranged between the side frame 42 and the load bearing saddles. The bogie foundation brake device is supported on the sliding groove wear plate of the side frame 42 by the left and right brake beams, two elastic side bearings are arranged in the side bearing box of the bolster 44, and the nylon core disc wear plate is placed in the lower core disc of the bolster 44. The detailed structure of the bogie can refer to the prior art, and only the description of part of the components is given herein.

[0070] The utility model is not limited to the above-mentioned embodiment, any deformation, improvement, replacement that the person skilled in the art can think of without departing from the essential content of the utility model falls into the range of the utility model.

Claims

1. A lever assembly for a truck foundation brake device, characterized by, The movable lever assembly comprises a movable lever and a first bushing; the movable lever is provided with three first holes along its length direction; the first bushing is provided with three first bushings; each first bushing comprises two first flange bushings which are symmetrically embedded in the corresponding first hole, and the first outer extension edge of the first flange bushing is located outside the first hole; each first bushing and the corresponding first hole are in interference fit; The fixed lever assembly comprises a fixed lever and a second bushing; the fixed lever is provided with three second holes along its length direction; the second bushing is provided with three second bushings; each second bushing comprises two second flange bushings which are symmetrically embedded in the corresponding second hole, and the second outer extension edge of the second flange bushing is located outside the second hole; each second bushing and the corresponding second hole are in interference fit; The movable lever assembly is connected to one end of the middle pull rod through a first pull rivet penetrating the first bushing in the middle, and the fixed lever assembly is connected to the other end of the middle pull rod through a third pull rivet penetrating the second bushing in the middle. The sum of the axial lengths of the two first flange bushings is less than the axial length of the first hole; the sum of the axial lengths of the two second flange bushings is less than the axial length of the second hole.

2. The lever assembly for a truck foundation brake assembly of claim 1 wherein, The three first holes are first hole A, first hole B and first hole C respectively; the first hole A is located at one end of the movable lever, the first hole C is located at the other end of the movable lever, and the first hole B is located between the first hole A and the first hole C and close to the first hole A.

3. The lever assembly for a truck foundation brake assembly of claim 1 wherein, The central axis of the first hole B and the central axis of the first hole C are parallel; the central axis of the first hole A and the central axis of the first hole B are not parallel, and have an intersection therebetween.

4. The lever assembly for a truck foundation brake assembly of claim 3 wherein, The diameter of the first hole B is greater than or equal to the diameter of the first hole A; the diameter of the first hole B is greater than the diameter of the first hole C.

5. The lever assembly for a truck foundation brake assembly of claim 3 wherein, The three second holes are second hole E, second hole F and second hole G respectively; the second hole E is located at one end of the fixed lever, the second hole G is located at the other end of the fixed lever, and the second hole F is located between the second hole E and the second hole G and close to the second hole E.

6. The lever assembly for a truck foundation brake assembly of claim 1 wherein, The central axis of the second hole F and the central axis of the second hole G are parallel; the central axis of the second hole E and the central axis of the second hole F are not parallel, and have an intersection therebetween.

7. The lever assembly for a truck foundation brake assembly of claim 6 wherein, The diameter of the second hole F is greater than or equal to the diameter of the second hole E; the diameter of the second hole F is greater than the diameter of the second hole G.

8. The lever assembly for a truck foundation brake assembly of claim 6 wherein, The movable lever assembly comprises a movable lever and a first bushing; the movable lever is provided with three first holes along its length direction; the first bushing is provided with three first bushings; each first bushing comprises two first flange bushings which are symmetrically embedded in the corresponding first hole, and the first outer extension edge of the first flange bushing is located outside the first hole; each first bushing and the corresponding first hole are in interference fit; 9. A bogie foundation brake apparatus characterized by, The fixed lever assembly comprises a fixed lever and a second bushing; the fixed lever is provided with three second holes along its length direction; the second bushing is provided with three second bushings; each second bushing comprises two second flange bushings which are symmetrically embedded in the corresponding second hole, and the second outer extension edge of the second flange bushing is located outside the second hole; each second bushing and the corresponding second hole are in interference fit; The movable lever assembly is connected to one end of the middle pull rod through a first pull rivet penetrating the first bushing in the middle, and the fixed lever assembly is connected to the other end of the middle pull rod through a third pull rivet penetrating the second bushing in the middle. The sum of the axial lengths of the two first flange bushings is less than the axial length of the first hole; the sum of the axial lengths of the two second flange bushings is less than the axial length of the second hole. The three first holes are first hole A, first hole B and first hole C respectively; the first hole A is located at one end of the movable lever, the first hole C is located at the other end of the movable lever, and the first hole B is located between the first hole A and the first hole C and close to the first hole A. The central axis of the first hole B and the central axis of the first hole C are parallel; the central axis of the first hole A and the central axis of the first hole B are not parallel, and have an intersection therebetween. The diameter of the first hole B is greater than or equal to the diameter of the first hole A; the diameter of the first hole B is greater than the diameter of the first hole C. The three second holes are second hole E, second hole F and second hole G respectively; the second hole E is located at one end of the fixed lever, the second hole G is located at the other end of the fixed lever, and the second hole F is located between the second hole E and the second hole G and close to the second hole E. The central axis of the second hole F and the central axis of the second hole G are parallel; the central axis of the second hole E and the central axis of the second hole F are not parallel, and have an intersection therebetween. The diameter of the second hole F is greater than or equal to the diameter of the second hole E; the diameter of the second hole F is greater than the diameter of the second hole G. The movable lever assembly comprises a movable lever and a first bushing; the movable lever is provided with three first holes along its length direction; the first bushing is provided with three first bushings; each first bushing comprises two first flange bushings which are symmetrically embedded in the corresponding first hole, and the first outer extension edge of the first flange bushing is located outside the first hole; each first bushing and the corresponding first hole are in interference fit; The fixed lever assembly comprises a fixed lever and a second bushing; the fixed lever is provided with three second holes along its length direction; the second bushing is provided with three second bushings; each second bushing comprises two second flange bushings which are symmetrically embedded in the corresponding second hole, and the second outer extension edge of the second flange bushing is located outside the second hole; each second bushing and the corresponding second hole are in interference fit; The movable lever assembly is connected to one end of the middle pull rod through a first pull rivet penetrating the first bushing in the middle, and the fixed lever assembly is connected to the other end of the middle pull rod through a third pull rivet penetrating the second bushing in the middle. The pull rivet includes a first pull rivet, a second pull rivet, a third pull rivet and a fourth pull rivet; the first pull rivet is arranged to penetrate a first bushing at the middle and one end of the middle pull rod, so that the middle pull rod is connected with the swing lever assembly; the second pull rivet is arranged to penetrate the first bushing at the other end and the first brake beam support, so that the swing lever assembly is connected with the first brake beam support; The second round pin is arranged to penetrate a second bushing at one end and the end of the chain ring, so that the chain ring is connected with the fixed lever assembly through the second round pin; The third pull rivet is arranged to penetrate a second bushing at the middle and the other end of the middle pull rod, so that the middle pull rod is connected with the fixed lever assembly; the fourth pull rivet is arranged to penetrate the second bushing at the other end and the second brake beam support, so that the fixed lever assembly is connected with the second brake beam support.

10. A bogie, characterized by It comprises the bogie foundation brake device of claim 9. It comprises the bogie foundation brake device of claim 9.

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