Foundation braking device of bogie

Abstract

The invention provides a bogie foundation brake device which comprises a first brake beam assembly, a second brake beam assembly, a movable lever, a fixed lever, a first pull rod, four brake heads, four elastic suspenders and the like. The two ends of the first brake beam assembly and the two ends of the second brake beam assembly are hinged to the lower end of an elastic suspender through brake heads, and the upper end of the elastic suspender is hinged and fixed to the steering side frame. Due to the fact that the elastic joints are arranged at the two ends of the elastic suspender, when a vehicle is braked, wheel pairs and the framework are still in elastic connection, and damage to wheel rails can be reduced. Moreover, the brake head can rotate around the elastic suspender, so that the brake shoe can automatically adapt to the angle of a wheel pair tread to be tightly attached during braking, the eccentric wear of the brake shoe is reduced, the friction force generated when the vehicle is relieved can be reduced, and the relieving performance is improved.

Description

Technical Field

[0001] This invention application belongs to the field of vehicle braking technology, specifically, it relates to a bogie-based braking device. Background Technology

[0002] The bogie base braking system is the device that transmits braking force in the railway vehicle braking system. Braking force is generated by the brake cylinder and ultimately transmitted to the brake shoes of the base braking system. The brake shoes actuate, pressing against the wheelset tread, generating rotational frictional resistance against the wheelset, thus braking the train in motion. The structure and performance of the base braking system are related to the operational safety of the vehicle and the service life of some vehicle components.

[0003] Currently, most railway freight cars use a grooved basic braking device, which means that both ends of the front and rear brake beams of the basic braking device have sliders. The sliders at both ends cooperate with the guide grooves on the side frames, and the upper fulcrum of the fixed lever is hinged to the bolster.

[0004] During braking, some of the impact between the wheel and rail is transmitted directly to the bogie side frame via the brake shoes and brake beam slider, effectively making the wheelset and side frame a rigid connection. This results in significant forces acting between the wheel and rail, causing severe bogie vibration, which is detrimental to the vehicle's dynamic performance and wheel-rail lifespan. Furthermore, when the vehicle brakes are released, the brake beam moves along the guide groove under the weight of the brake beam and the force of the brake cylinder's release spring. Frictional resistance exists between the slider at the end of the brake beam and the contact surface of the groove, which not only reduces the vehicle's braking release performance but also increases the possibility of uneven brake shoe wear, adversely affecting vehicle operating safety and brake shoe lifespan. Summary of the Invention

[0005] In view of the problem of unreasonable design of braking devices in the prior art, this application of the present invention aims to provide a bogie basic braking device that can reduce wheel-rail impact during vehicle braking and improve the braking and relief performance of the vehicle.

[0006] In one aspect, this application provides a bogie-based braking device, including a first brake beam assembly, a second brake beam assembly, a floating lever, a fixed lever, a first tie rod, four brake shoe supports, and four elastic suspension rods; The first brake beam assembly includes a first brake beam, a first bow-shaped rod, and a first support rod, with both ends of the first support rod fixed between the middle of the first brake beam and the middle of the first bow-shaped rod, respectively. The second brake beam assembly includes a second brake beam, a second bow-shaped rod, and a second support rod, with both ends of the second support rod fixed between the middle of the second brake beam and the middle of the second bow-shaped rod, respectively. The brake shoe support is provided with a rotating shaft and mounting holes on both sides, and the four brake shoe supports are fixed to the two ends of the first brake beam assembly and the two ends of the second brake beam assembly through the mounting holes, and brake shoes are fixedly installed on the four brake shoe supports respectively; The four elastic rods are respectively provided with upper elastic joints and lower elastic joints at both ends. Each elastic rod is hinged to the rotating shaft on the brake shoe support through the lower elastic joint. Each elastic rod is hinged to one end of the side frame support through the upper elastic joint. The other end of the side frame support is fixed to the steering side frame. The middle part and one end of the movable lever are respectively hinged to one end of the first pull rod and the first support rod, the middle part and one end of the fixed lever are respectively hinged to the other end of the first pull rod and the second support rod, the other end of the movable lever is hinged to the second pull rod of the vehicle braking system, and the other end of the fixed lever is hinged to the fixed lever support on the bolster assembly.

[0007] In one possible implementation, one end of the movable lever is hinged to the first support rod, the middle part of the movable lever is hinged to one end of the first pull rod, one end of the fixed lever is hinged to the second support rod, and the middle part of the fixed lever is hinged to the other end of the first pull rod.

[0008] In one possible implementation, one end of the first pull rod is provided with at least two first hinge mounting holes, and the other end of the first pull rod is provided with at least two second hinge mounting holes.

[0009] In one possible implementation, each brake shoe support has a grooved arc-shaped bearing surface on its front side and a raised arc-shaped mounting surface on its rear side. The groove and the raised surface are fitted together so that the arc-shaped bearing surface and the arc-shaped mounting surface fit tightly together.

[0010] In one possible implementation, a corresponding pin hole is provided between the brake shoe support and the brake shoe, and the brake shoe is fixed on the brake shoe support by passing a brake shoe pin through the pin hole.

[0011] In one possible implementation, the two ends of the first bow-shaped rod are respectively fixed in the mounting holes of the corresponding brake shoe support, and the two ends of the first brake beam are fixed to the rear side of the corresponding brake shoe support. The two ends of the second bow-shaped rod are respectively fixed in the mounting holes of the corresponding brake shoe support, and the two ends of the second brake beam are fixed to the rear side of the corresponding brake shoe support.

[0012] In one possible implementation, the mounting hole on one side of each brake shoe is recessed to the other side to form the rotating shaft.

[0013] In one possible implementation, the elastic boom is a straight rod, and the plane of rotation of the elastic boom is parallel to the plumb plane of the travel direction.

[0014] In one possible implementation, both the upper and lower elastic joints include an annular elastic portion and an inner steel ring and an outer steel ring respectively vulcanized on the inner and outer sides of the annular elastic portion, wherein the outer steel ring is provided with at least one notch. After compression deformation, the upper and lower elastic joints are installed in the third hinge mounting holes at both ends of the elastic rod, thereby making the upper and lower elastic joints interference fit with the third hinge mounting holes.

[0015] In one possible implementation, a fixed end cap is provided on the inner side of the upper elastic joint and the outer side of the lower elastic joint.

[0016] Secondly, this application also provides a vehicle including the bogie-based braking device described in any of the above embodiments.

[0017] The bogie basic braking device provided in this invention application has the following beneficial effects: 1. Because an elastic suspender is installed in the bogie base braking device, and elastic joints are installed at both ends of the elastic suspender, the wheelset and frame remain elastically connected when the vehicle brakes. This helps to reduce the dynamic force between the wheel and rail, thereby improving the vehicle's dynamic performance and reducing wheel and rail damage.

[0018] 2. Both the first brake beam assembly and the second brake beam assembly are suspended on the steering side frame by elastic hangers. When the vehicle brakes are released, the bogie base braking device is only subjected to frictional resistance at the hinge. This frictional resistance is small and helps to improve the braking release performance.

[0019] 3. The brake shoe support can rotate around the elastic suspension rod. The fixed end cover on the outside of the shaft can prevent the first brake beam and the second brake beam from shifting laterally, so that the brake shoe can automatically adapt to the angle of the wheel tread and fit tightly with the tread, which helps to reduce brake shoe wear. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] Figure 1 A schematic diagram of the structure of a bogie base braking device provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of a first brake beam assembly provided in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a first pull rod provided in one embodiment of this application; Figure 4 for Figure 1 Enlarged view of part A; Figure 5 A schematic diagram of the flexible fulcrum and chain hoof ring; Figure 6 This is a schematic diagram of the structure of a brake shoe holder provided in one embodiment of this application; Figure 7 This is a schematic diagram of the structure of a brake shoe provided in one embodiment of this application; Figure 8 for Figure 1 Enlarged view of part B; Figure 9 This is a schematic diagram of the structure of an elastic suspension rod provided in one embodiment of this application; Figure 10 This is a schematic diagram of the structure of an upper elastic joint provided in one embodiment of this application; Figure 11 for Figure 1 Another perspective view of the bogie foundation braking device shown. Figure 12 for Figure 1 Enlarged view of part C; Figure 13 This is a schematic diagram illustrating the installation of the bogie base braking device and the frame according to one embodiment of this application.

[0022] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments.

[0023] The labels in the image are as follows: 1-First brake beam assembly, 11-First brake beam, 12-First bow-shaped rod, 13-First support rod; 2-First brake beam assembly, 21-Second brake beam, 22-Second bow-shaped rod, 23-Second support rod; 31-Floating lever, 32-Fixed lever, 33-First pull rod, 33a-First hinge mounting hole, 33b-Second hinge mounting hole, 34-Fixed lever support, 35-Flexible fulcrum, 35a-Fourth hinge mounting hole, 36-Chain hoof ring; 4-Brake shoe support, 41-Groove, 42-Arc-shaped bearing surface, 43-Rotating shaft, 44-Mounting hole; 5-Brake shoe, 51-Protrusion, 52-Arc-shaped mounting surface; 6-Elastic rod, 61-Third hinge mounting hole, 62-Upper elastic joint, 62a-Annular elastic part, 62b-Inner steel ring, 62c-Outer steel ring, 62d-Notch, 63-Lower elastic joint; 7-Side frame support, 8-Boarding side frame, 9-Fixed end cap, 10-Wheelset. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0025] In the embodiments of this application, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that the terms "first" and "second" do not necessarily imply that they are different.

[0026] It should be noted that, in the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0027] In the embodiments of this application, "at least one" means one or more, and "more than one" means two or more.

[0028] It should be noted that "at the time of..." in the embodiments of this application can be either at the instant when a certain situation occurs, or for a period of time after the occurrence of a certain situation. The embodiments of this application do not make specific limitations on this.

[0029] Currently, most railway freight cars use a grooved basic braking device, which means that both ends of the front and rear brake beams of the basic braking device have sliders. The sliders at both ends cooperate with the guide grooves on the side frames, and the upper support point of the fixing rod is hinged to the bolster.

[0030] During braking, some of the impact between the wheel and rail is transmitted directly to the bogie side frame via the brake shoes and brake beam slider, effectively making the wheelset and side frame a rigid connection. This results in significant forces acting between the wheel and rail, causing severe bogie vibration, which is detrimental to the vehicle's dynamic performance and wheel-rail lifespan. Furthermore, when the vehicle brakes are released, the brake beam moves along the guide groove under the weight of the brake beam and the force of the brake cylinder's release spring. Frictional resistance exists between the slider at the end of the brake beam and the contact surface of the groove, which not only reduces the vehicle's braking release performance but also increases the possibility of uneven brake shoe wear, adversely affecting vehicle operating safety and brake shoe lifespan.

[0031] To address the aforementioned issues, this application provides a bogie base braking device. This device uses elastic hangers with elastic joints at both ends to mount the bogie base braking device on the bogie side frame, ensuring that the wheelset and frame remain elastically connected during vehicle braking. This helps reduce the dynamic forces between the wheel and rail, thereby improving vehicle dynamics and reducing wheel and rail damage.

[0032] Figure 1 This is a schematic diagram of the structure of a bogie base braking device provided in one embodiment of this application. Figure 1 As shown, the bogie base braking device provided in this application embodiment includes: a first brake beam assembly 1, a second brake beam assembly 2, a floating lever 31, a fixed lever 32, a first tie rod 33, four brake shoe supports 4, and four elastic suspension rods 6.

[0033] The first brake beam assembly 1 and the second brake beam assembly 2 have the same structure, only their front and rear positions are different. The following will only use... Figure 2 The first brake beam assembly shown will be explained.

[0034] like Figure 2 As shown, the first brake beam assembly 1 includes a first brake beam 11, a first bow-shaped rod 12 and a first support rod 13. The two ends of the first support rod 13 are respectively fixed between the middle of the first brake beam 11 and the middle of the first bow-shaped rod 12.

[0035] Accordingly, see Figure 1 The second brake beam assembly 2 includes a second brake beam 21, a second bow-shaped rod 22, and a second support rod 23. The two ends of the second support rod 23 are respectively fixed between the middle of the second brake beam 21 and the middle of the second bow-shaped rod 22.

[0036] The brake shoe support 4 has a rotating shaft 43 and a mounting hole 44 on both sides, and the four brake shoe supports 4 are fixed to the two ends of the first brake beam assembly 1 and the two ends of the second brake beam assembly 2 through the mounting hole 44 on the inner side, and the four brake shoe supports 4 are respectively fixedly installed with brake shoes 5.

[0037] Each of the four elastic rods 6 has two elastic joints at both ends, according to Figure 1 As shown, the two elastic joints are the upper elastic joint 62 and the lower elastic joint 63. Each elastic rod 6 is hinged to the pivot 43 on the outside of the brake shoe support 4 through the lower elastic joint 63, and is hinged to one end of the side frame support 7 through the upper elastic joint 62. The other end of the side frame support 7 is fixed to the steering side frame 8.

[0038] Continue reading Figure 1 The middle and lower ends of the movable lever 31 are hinged to one end of the first pull rod 33 and the first support rod 13, respectively, and the middle and lower ends of the fixed lever 32 are hinged to the other end of the first pull rod 33 and the second support rod 23, respectively.

[0039] There are two main ways to fix the first lever 33 to the movable lever 31 and the fixed lever 32.

[0040] In one specific embodiment, the first pull rod 33 adopts a middle pull rod structure, specifically: one end of the floating lever 31 is hinged to the first support rod 13, the middle part of the floating lever 31 is hinged to one end of the first pull rod 33, one end of the fixed lever 32 is hinged to the second support rod 23 respectively, and the middle part of the fixed lever 32 is hinged to the other end of the first pull rod 33.

[0041] In another specific embodiment, the second lever can also adopt a pull rod structure, specifically: the middle part of the floating lever 31 is hinged to the first support rod 13, one bottom end of the floating lever 31 is hinged to one end of the first pull rod 33, the middle part of the fixed lever 32 is hinged to the second support rod 23, and one bottom end of the fixed lever 32 is hinged to the other end of the first pull rod 33.

[0042] In this application, a central tie rod structure is selected. The advantages of the central tie rod structure are: due to the inclined setting of the floating lever 31 and the fixed lever 32, there is a large space under the bolster, which facilitates the installation of the cross support device, resulting in high anti-diaphragm stiffness and good vehicle stability.

[0043] In one specific embodiment, the upper end of the movable lever 31 (shown in the figure with a hinge hole) is hinged to the second pull rod of the vehicle braking system, and the upper end of the fixed lever 32 is hinged to the fixed lever 32 support on the bolster assembly.

[0044] When the vehicle braking system releases the brakes, the second lever acts on one end of the floating lever 31, which in turn drives the first lever 33 and the fixed lever 32 to move, and then drives the first brake beam assembly 1, the second brake beam assembly 2, the brake shoe support 4, and the brake shoe 5 to move.

[0045] Figure 3 This is a schematic diagram of the structure of a first pull rod provided in one embodiment of this application. Figure 3 As shown, one end of the first pull rod 33 is provided with at least two first hinge mounting holes 33a, and the other end of the first pull rod 33 is provided with at least two second hinge mounting holes 33b.

[0046] By providing at least two first hinge mounting holes 33a at one end of the first pull rod 33, the hinge point between the floating lever and one end of the first pull rod 33 can be adjusted. By providing at least two second hinge mounting holes 33b at the other end of the first pull rod 33, the hinge point between the lower end of the fixed lever 32 and the other end of the first pull rod 33 can be adjusted.

[0047] In one specific embodiment, one end of the first pull rod 33 is provided with three first hinge mounting holes 33a, and the other end of the first pull rod 33 is also provided with three second hinge mounting holes 33b. In this way, the first pull rod 33 can also be used in reverse to connect the floating lever 31 and the fixed lever 32.

[0048] Figure 4 for Figure 1 The enlarged view of part B shows the connection between the support of fixed lever 32 and fixed lever 32. Figure 5 This is a schematic diagram of the flexible fulcrum and chain hoof ring. (See attached diagram.) Figure 4 and Figure 5 As shown, one end of the fixed lever 32 support is welded to the bolster, and the other end is fixed to one end of the flexible fulcrum 35 through the chain hoof ring 36. The other end of the flexible fulcrum 35 is hinged to the upper end of the fixed lever 32. At least two fourth hinge mounting holes 35a are provided at the hinge point between the flexible fulcrum 35 and the fixed lever 32. By providing at least two fourth hinge mounting holes 35a, the hinge point between the upper end of the fixed lever 32 and the flexible fulcrum 35 can be adjusted.

[0049] In one specific embodiment, three fourth hinge mounting holes 35a are provided.

[0050] Figure 6 This is a schematic diagram of the structure of a brake shoe holder provided in one embodiment of this application. Figure 7 This is a schematic diagram of the brake shoe structure provided in one embodiment of this application. Figure 6 , Figure 7 As shown, the specific structure of the brake shoe support 4 with the brake shoe 5 fixedly installed can be as follows: Each brake shoe support 4 has an arc-shaped bearing surface 42 with a groove 41 on its front side, and each brake shoe 5 has an arc-shaped mounting surface 52 with a protrusion 51 on its rear side. The groove 41 and the protrusion 51 are fitted together so that the arc-shaped bearing surface 42 and the arc-shaped mounting surface 52 fit tightly together.

[0051] A corresponding pin hole is provided between the brake shoe support 4 and the brake shoe 5. The pin hole is through which the brake shoe 5 is inserted so that the brake shoe 5 is fixed on the brake shoe support 4.

[0052] Providing a groove 41 on the brake shoe support 4 and a protrusion 51 on the brake shoe 5 that matches the groove 41 enhances the installation stability of the brake shoe support 4 and the brake shoe 5. More preferably, in addition to the cooperation of the groove 41 and the protrusion 51, some keyway structures can be added between the arc-shaped bearing surface 42 and the arc-shaped mounting surface 52 to improve stability. Of course, other suitable installation structures can also be used according to actual needs.

[0053] Continue reading Figure 6In one embodiment of this application, a mounting hole 44 is provided on the inner side of the brake shoe support 4, and a rotating shaft 43 is independently formed on the outer side of the brake shoe support 4. In another embodiment, the mounting hole 44 can be recessed to the other side to form a protruding rotating shaft 43, in which case the mounting hole 44 and the rotating shaft 43 are positioned opposite each other on both sides of the brake shoe support 4.

[0054] Figure 8 for Figure 1 The enlarged view of part B shows a schematic diagram of the connection between one end of the first brake beam assembly 1 and the brake shoe holder 4. Figure 8 As shown in the embodiment of this application, the two ends of the first bow-shaped rod 12 are respectively fixed in the mounting holes 44 on the inner side of the corresponding brake shoe support 4, while the two ends of the first brake beam 11 are fixed to the rear side of the corresponding brake shoe support 4 by bolts.

[0055] In another embodiment, a three-way pipe can be provided between the end of the first brake beam assembly 1 and the brake shoe support 4, wherein the ends of the first bow-shaped rod 12 and the first brake beam 11 on the same side are respectively inserted and fixed in two holes of the three-way pipe, and the brake shoe support 4 is sleeved with the remaining end of the three-way pipe.

[0056] Accordingly, the installation method between the end of the second brake beam assembly 2 and the brake shoe holder 4 can be referred to Figure 8 Specifically: the two ends of the second bow-shaped rod 22 are respectively fixed in the mounting holes 44 on the inner side of the corresponding brake shoe support 4, and the two ends of the second brake beam 21 are fixed on the rear side of the corresponding brake shoe support 4.

[0057] Figure 9 This is a schematic diagram of the structure of an elastic suspension rod provided in one embodiment of this application; Figure 10 This is a schematic diagram of the structure of an upper elastic joint provided in one embodiment of this application; Figure 11 for Figure 1 The diagram shows another perspective of the bogie base braking device, which is a top view of the bogie base braking device.

[0058] like Figure 9 As shown in the embodiment of this application, the elastic rod 6 is a straight rod, and a third hinge mounting hole 61 is opened at both ends of the elastic rod 6, which is used to install the upper elastic joint 62 and the lower elastic joint 63 respectively.

[0059] like Figure 10 As shown in the embodiment of this application, the upper elastic joint 62 includes an annular elastic portion 62a and an inner steel ring 62b and an outer steel ring 62c vulcanized on the inner and outer sides of the annular elastic portion 62a, respectively. The outer steel ring 62c has at least one notch 62d. The annular elastic portion 62a can be made of rubber or other suitable elastic materials.

[0060] The notch 62d allows the outer steel ring 62c to deform and reduce its outer diameter when the upper elastic joint 62 is compressed. This allows the upper elastic joint 62, after compression deformation, to be installed in the third hinge mounting hole 61 of the elastic rod 6, thus achieving an interference fit between the upper elastic joint 62 and the third hinge mounting hole 61.

[0061] In one specific embodiment, the outer steel ring 62c of the upper elastic joint 62 is provided with three annularly distributed notches 62d, so that when the outer steel ring 62c is squeezed, the outer diameter of the outer steel ring 62c can be reduced uniformly.

[0062] As for the lower elastic joint 63, since it has the same structure as the upper elastic joint 62, except that the two are located at the two ends of the elastic rod 6 respectively, it will not be described in detail here.

[0063] The elastic suspension rod 6 in the above embodiment is provided with an upper elastic joint 62 and a lower elastic joint 63 at both ends, which can be elastically connected to the steering side frame 8 and the ends of the two brake beam assemblies, respectively.

[0064] like Figure 11 As shown, the rotation plane of the elastic boom 6 is parallel to the vertical plane in the direction of travel. Assume the vertical plane in the direction of travel extends along direction D and is perpendicular to... Figure 11 As shown in the first plane of the paper, the plane of rotation of the two ends of the elastic rod 6 during rotation is an axis extending along the E direction and perpendicular to the plane of rotation. Figure 11 The second plane shown on the paper, that is, the first plane and the second plane need to be basically parallel. This limitation can prevent the two ends of the elastic rod 6 from swinging to the sides during rotation.

[0065] Of course, when the steering side frame 8 travels on the track, it may deviate to a certain extent to the left and right. Therefore, the elastic rod 6 will still swing to a certain extent to the left and right. However, the elastic rod 6 should not actively deviate to the sides during its rotation.

[0066] Figure 12 for Figure 1 An enlarged view of section C shows a schematic diagram of the hinge at one of the lower elastic joints 63. (See also...) Figure 1 and Figure 10 As shown in this embodiment, a second brake beam 21 is fixed to the rear side of the brake shoe support 4, and the outer pivot 43 is hinged to the lower elastic joint 63. A fixed end cap 9 is provided on the outer side of the hinge. Because the elastic joint contains elastic material, the second brake beam 21 will move laterally to both ends along with the fixed brake shoe support 4. This will cause uneven wear between the brake shoe support 4 and the brake shoe 5. Moreover, because the inner and outer diameters of the wheel are different, the lateral movement of the second brake beam 21 will also cause uneven wear on the two brake shoes 5.

[0067] After the fixed end cover 9 is installed in the above embodiment, the second brake beam 21 can be prevented from moving laterally with the brake shoe support 4, so that the wear between the brake shoe support 4 and the brake shoe 5 is uniform and there will be no uneven wear.

[0068] The above description only describes the case where fixed end caps 9 are provided on the outer shafts 43 of the elastic rods 6 at both ends of the second brake beam assembly 2. Those skilled in the art will understand that fixed end caps 9 can also be provided on the outer shafts 43 of the elastic rods 6 at both ends of the first brake beam assembly 1 to prevent the first brake beam 11 from shifting laterally. Fixed end caps 9 can also be provided on the outer shafts 43 of the elastic rods 6 at one end of the side frame support 7 to prevent the elastic rods 6 from shifting laterally relative to the side frame support 7.

[0069] This application also provides a vehicle that includes the bogie-based braking device mentioned in any of the above embodiments. The vehicle using the bogie-based braking device can improve braking relief performance.

[0070] Figure 13 This is a schematic diagram illustrating the installation between the bogie base braking device and the frame according to one embodiment of this application. The frame refers to the installation portion excluding the bogie base braking device, bolster, and wheelsets, such as the two side bogie frames 8 and the bottom-connected crossbars. See also... Figure 11 As shown below, the working principle and braking force transmission process of the bogie base braking device using any of the above embodiments during vehicle braking and release will be described in detail.

[0071] When the vehicle brakes, the braking force generated by the brake cylinder is transmitted to the upper end of the floating lever 31 of the bogie base braking device via the second tie rod of the vehicle brake. Part of the force of the floating lever 31 is transmitted to the first brake beam assembly 1, and part is transmitted to the middle of the fixed lever 32 via the first tie rod 33. Since the upper end of the fixed lever 32 is hinged to the fixed lever 32 support on the bolster assembly, the force transmitted by the first tie rod 33 ultimately acts on the second brake beam assembly 2. Since the two ends of the first brake beam assembly 1 and the second brake beam assembly 2 are suspended from the bogie side frame by elastic hangers 6, when the first brake beam 11 and the second brake beam 21 are subjected to force, the elastic hangers 6 at both ends of the first brake beam 11 rotate at an angle relative to the first brake beam 11 and the side frame support 7, and at the same time, the elastic hangers 6 at both ends of the second brake beam 21 rotate at the same angle relative to the second brake beam 21 and the side frame support 7, so that the brake shoe 5 can move in the direction of the wheelset until it is in close contact with the wheelset tread, thereby achieving braking.

[0072] When the brakes are released, the braking force disappears. Due to the weight of the elastic rod 6 and the force of the brake cylinder release spring, and because the rotational frictional resistance between the elastic rod 6 and the shaft 43 is small, the brake shoe 5 can quickly separate from the wheel tread.

[0073] For the aforementioned bogie basic braking device, the presence of the elastic suspender 6 ensures that the wheelset and frame remain elastically connected during vehicle braking. This reduces the dynamic forces between the wheel and rail, thereby improving the vehicle's dynamic performance and minimizing wheel-rail damage. Furthermore, the friction between the first brake beam assembly 1 and the second brake beam assembly 2 relative to the elastic suspender 6 is relatively low, allowing the brake shoes 5 to better conform to the wheelset tread during braking, reducing uneven wear on the brake shoes 5 and improving release performance during brake release.

[0074] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A bogie base braking device, characterized in that, It includes a first brake beam assembly (1), a second brake beam assembly (2), a floating lever (31), a fixed lever (32), a first pull rod (33), four brake shoe supports (4) and four elastic rods (6); The first brake beam assembly (1) includes a first brake beam (11), a first bow-shaped rod (12) and a first support rod (13), with the two ends of the first support rod (13) respectively fixed between the middle part of the first brake beam (11) and the middle part of the first bow-shaped rod (12); The second brake beam assembly (2) includes a second brake beam (21), a second bow-shaped rod (22), and a second support rod (23). The two ends of the second support rod (23) are respectively fixed between the middle part of the second brake beam (21) and the middle part of the second bow-shaped rod (22). The brake shoe support (4) is provided with a rotating shaft (43) and a mounting hole (44) on both sides respectively, and the four brake shoe supports (4) are fixed to the two ends of the first brake beam assembly (1) and the two ends of the second brake beam assembly (2) respectively through the mounting hole (44). The four brake shoe supports (4) are respectively fixedly installed with brake shoes (5). The four elastic rods (6) are respectively provided with upper elastic joints (62) and lower elastic joints (63) at both ends. Each elastic rod (6) is hinged to the rotating shaft (43) on the brake shoe support (4) through the lower elastic joint (63). Each elastic rod (6) is hinged to one end of the side frame support (7) through the upper elastic joint (62). The other end of the side frame support (7) is fixed on the steering side frame (8). The middle part and one end of the movable lever (31) are respectively hinged to one end of the first pull rod (33) and the first support rod (13), the middle part and one end of the fixed lever (32) are respectively hinged to the other end of the first pull rod (33) and the second support rod (23), the other end of the movable lever (31) is hinged to the second pull rod of the vehicle braking system, and the other end of the fixed lever (32) is hinged to the fixed lever (32) support on the bolster assembly.

2. The bogie base braking device according to claim 1, characterized in that, One end of the movable lever (31) is hinged to the first support rod (13), the middle part of the movable lever (31) is hinged to one end of the first pull rod (33), one end of the fixed lever (32) is hinged to the second support rod (23), and the middle part of the fixed lever (32) is hinged to the other end of the first pull rod (33).

3. The bogie base braking device according to claim 1 or 2, characterized in that, One end of the first pull rod (33) is provided with at least two first hinge mounting holes (33a), and the other end of the first pull rod (33) is provided with at least two second hinge mounting holes (33b).

4. The bogie base braking device according to claim 1, characterized in that, Each brake shoe support (4) has an arc-shaped bearing surface (42) with a groove (41) on its front side, and each brake shoe (5) has an arc-shaped mounting surface (52) with a protrusion (51) on its rear side. The groove (41) and the protrusion (51) are fitted together so that the arc-shaped bearing surface (42) and the arc-shaped mounting surface (52) fit tightly together.

5. The bogie base braking device according to claim 4, characterized in that, The brake shoe support (4) and the brake shoe (5) are provided with corresponding pin holes, and the brake shoe (5) is fixed on the brake shoe support (4) by inserting a pin through the pin hole.

6. The bogie base braking device according to claim 1, characterized in that, The first bow-shaped rod (12) is fixed at both ends in the mounting holes (44) of the corresponding brake shoe support (4), and the first brake beam (11) is fixed at both ends on the rear side of the corresponding brake shoe support (4); The two ends of the second bow-shaped rod (22) are respectively fixed in the mounting holes (44) of the corresponding brake shoe support (4), and the two ends of the second brake beam (21) are fixed on the rear side of the corresponding brake shoe support (4).

7. The bogie base braking device according to claim 6, characterized in that, The mounting hole (44) on one side of each brake shoe (4) is recessed to the other side to form the pivot (43).

8. The bogie base braking device according to claim 1, characterized in that, The elastic rod (6) is a straight rod, and the plane of rotation of the elastic rod (6) is parallel to the vertical plane of the travel direction.

9. The bogie base braking device according to claim 1, characterized in that, The upper elastic joint (62) and the lower elastic joint (63) each include an annular elastic portion (62a) and an inner steel ring (62b) and an outer steel ring (62c) respectively vulcanized on the inner and outer sides of the annular elastic portion (62a). The outer steel ring (62c) is provided with at least one notch (62d). After compression deformation, the upper elastic joint (62) and the lower elastic joint (63) are installed in the third hinge mounting holes (61) at both ends of the elastic rod (6), so that the upper elastic joint (62) and the lower elastic joint (63) are interference-fitted with the third hinge mounting holes (61).

10. The bogie base braking device according to claim 9, characterized in that, Fixed end caps (9) are provided on the inner side of the upper elastic joint (62) and the outer side of the lower elastic joint (63).

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