Primary suspension system and railway vehicle

Abstract

The invention discloses a primary suspension system and a railway vehicle. The primary suspension system comprises a framework; the axle box body is arranged on the inner side of the side beam of the framework; the rubber node assembly is connected between the top of the axle box body and the framework and is used for providing longitudinal and transverse positioning rigidity and releasing vertical rigidity; the two steel spring assemblies are connected between the top of the axle box body and the framework, and the two steel spring assemblies are located on the two sides, in the longitudinal direction, of the rubber node assembly correspondingly and used for providing vertical rigidity; and the positioning pull rod is connected between the bottom of the axle box body and the framework and is used for providing longitudinal rigidity and releasing vertical rigidity and transverse rigidity. Decoupling of the vertical rigidity, the transverse rigidity and the longitudinal rigidity is achieved, the rigidity in the vertical direction, the rigidity in the longitudinal direction and the rigidity in the transverse direction are independently achieved, the requirement that a primary suspension system has enough wheel set axle box positioning rigidity and small vertical rigidity can be met, and the critical speed and the riding comfort of a vehicle are guaranteed; and the high-speed stability and stability requirements of the vehicle are met.

Description

Technical Field

[0001] The present invention relates to the technical field of primary suspension systems for rail vehicles, and more specifically, to a primary suspension system. In addition, the present invention also relates to a rail vehicle comprising the primary suspension system. Background Art

[0002] The primary suspension system of the bogie with built-in axle box is located on the inner side of the frame side beam and is restricted by the drive system, resulting in a particularly compact structural space for the primary suspension system.

[0003] In one related technology, the primary suspension system uses a steel coil spring + swing arm positioning structure, however, this structure occupies too much space and cannot meet the space requirements of the miniaturization of the built-in bogie. In another related technology, the primary suspension system uses a rubber spring, which can be installed in a small space. However, due to the coupling of its vertical stiffness, longitudinal stiffness and lateral stiffness, and its strong nonlinearity, it has a large stiffness under large loads.

[0004] Therefore, how to provide a suspension system that can achieve decoupling of stiffness in the three directions of droop, longitudinal and lateral directions in a small structure space is a problem that urgently needs to be solved by technical personnel in this field. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a first-order suspension system that can achieve stiffness decoupling in three directions, vertical, longitudinal and lateral, in a small structural space.

[0006] Another object of the present invention is to provide a rail vehicle comprising the above-mentioned primary suspension system, which can achieve stiffness decoupling of the primary suspension system in three directions, vertical, longitudinal and lateral, in a small structural space.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A primary suspension system, comprising:

[0009] Framework;

[0010] an axle box body, arranged on the inner side of the side beam of the frame;

[0011] A rubber node assembly, connected between the top of the axle box and the frame, for providing longitudinal and transverse positioning stiffness and releasing vertical stiffness;

[0012] Two steel spring assemblies are connected between the top of the axle box and the frame, and the two steel spring assemblies are respectively located on both sides of the rubber node assembly along the longitudinal direction to provide vertical stiffness;

[0013] The positioning rod is connected between the bottom of the axle box and the frame, and is used to provide longitudinal rigidity and release vertical rigidity and lateral rigidity.

[0014] Optionally, an adjustment pad is provided between the steel spring assembly and the top of the axle box body;

[0015] The steel spring assembly includes an upper clamping plate, a lower clamping plate and a steel spring connected between the upper clamping plate and the lower clamping plate. The upper clamping plate is connected to the frame and is provided with a through hole. The upper end of the lower clamping plate is provided with a first threaded hole. The first threaded hole is used for screwing in a process bolt so as to increase, decrease or replace the adjustment pad by changing the vertical position of the lower clamping plate.

[0016] Optionally, the frame is provided with a cavity, the steel spring assembly is provided in the cavity, a box-type structure is formed at the top of the cavity, the top of the steel spring assembly is provided in the box-type structure and abuts against the top inner wall of the box-type structure.

[0017] Optionally, the rubber node assembly includes:

[0018] A rubber node, comprising a core shaft and a rubber portion arranged on the outer periphery of the core shaft, wherein the upper end of the core shaft has a tapered guide column;

[0019] A frame side mounting seat connected to the frame and provided with an inner conical hole, wherein the inner conical hole is cooperatively connected with the conical guide column;

[0020] The axle box side mounting seat is connected to the axle box body and the outer periphery of the rubber part, and is provided with a positioning hole. The axle box body is provided with a positioning boss that cooperates with the positioning hole for positioning.

[0021] Optionally, the frame side mounting seat is provided with a first process withdrawal hole communicating with the inner conical hole, the top of the conical guide column is provided with a second threaded hole, and the rubber node assembly further includes:

[0022] A first mounting bolt passes through the first process withdrawal hole and is connected to the second threaded hole, and a head of the first mounting bolt is pressed onto the frame through a gland;

[0023] The first process withdrawal hole is used for allowing the first process withdrawal part to pass through during disassembly, so as to apply a vertical downward force to the top end of the mandrel to separate the mandrel from the frame side mounting seat.

[0024] Optionally, there is a preset distance between the bottom of the core shaft and the top of the axle box body, so that when the vertical displacement of the primary suspension system exceeds a preset value, the core shaft and the axle box body are in contact and limited position.

[0025] Optionally, the frame is provided with a first lifting lug, and the outer periphery of the rubber node assembly is provided with a second lifting lug, further comprising:

[0026] A lifting rod is used to be connected to the first lifting lug and the second lifting lug respectively so as to lift the axle box.

[0027] Optionally, the suspension rod comprises a first suspension rod and a second suspension rod symmetrically arranged about the rubber node assembly, one of the first suspension rod and the second suspension rod is a fixed-length suspension rod, and the other is a length-adjustable suspension rod.

[0028] Optionally, the positioning rod has a bending portion.

[0029] A rail vehicle comprises any one of the above-mentioned primary suspension systems.

[0030] The first-stage suspension system provided by the present invention has the following beneficial effects:

[0031] The steel spring assembly provides vertical stiffness and releases lateral stiffness and longitudinal stiffness, and the rubber node assembly provides lateral stiffness and longitudinal stiffness and releases vertical stiffness. It can be seen that by setting the steel spring assembly and the rubber node assembly, the vertical stiffness is decoupled from the lateral stiffness and longitudinal stiffness respectively. In addition, the positioning rod provides longitudinal stiffness and releases vertical stiffness and lateral stiffness, that is, the lateral stiffness of the primary suspension system is provided by the rubber node assembly, and the longitudinal stiffness of the primary suspension system is provided by the rubber node assembly and the positioning rod. The positioning rod can supplement the lack of longitudinal stiffness without participating in the lateral positioning constraint. That is, the primary suspension system realizes the decoupling of vertical stiffness, lateral stiffness and longitudinal stiffness, and can make the stiffness in the three directions of vertical, longitudinal and lateral be realized independently, thereby satisfying the primary suspension system with smaller vertical stiffness, larger longitudinal stiffness and more moderate lateral stiffness between the vertical stiffness and the longitudinal stiffness, so as to ensure sufficient wheelset axle box positioning stiffness and smaller vertical stiffness, ensure the critical speed and ride comfort of the vehicle, and meet the vehicle's high-speed stability and smoothness requirements.

[0032] In addition, the first-stage suspension system sets the rubber node assembly and the two steel spring assemblies on the top of the axle box body, so that the rubber node assembly becomes an axle box top-mounted rubber node assembly, and the steel spring assembly becomes an axle box top-mounted steel spring assembly. This arrangement has a compact structure and occupies a small space. In addition, the axle box top-mounted rubber node assembly and the axle box top-mounted steel spring assembly are also conducive to operating the rubber node assembly and the steel spring assembly from the top of the frame, which is particularly suitable for the axle box built-in bogie and the installation of the first-stage suspension system is limited by the drive system, thereby facilitating the improvement of process convenience. Moreover, the number of steel spring assemblies is two, and the two steel spring assemblies are respectively arranged on both sides of the rubber node assembly along the longitudinal direction, which can achieve a larger vertical load-bearing capacity in a small lateral space. And the steel spring assembly has linear vertical stiffness.

[0033] The rail vehicle provided by the present invention comprises the above-mentioned primary suspension system and has the same beneficial effects as the primary suspension system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0035] Figure 1 A cross-sectional view of a suspension system provided by a specific embodiment of the present invention;

[0036] Figure 2 for Figure 1 The cross-sectional view of the first-order suspension system when adjusting the adjustment pad is shown;

[0037] Figure 3 for Figure 1 A top view of

[0038] Figure 4 This is a cross-sectional view of the assembled rubber node assembly and adjustable length hanger rod.

[0039] Reference numerals:

[0040] 1-frame; 11-cavity; 111-box-type structure; 12-first lifting ear; 2-axle box; 21-positioning boss; 3-rubber node assembly; 31-rubber node; 311-core shaft; 3111-conical guide column; 312-rubber part; 32-frame side mounting seat; 321-first process withdrawal hole; 33-axle box side mounting seat; 331-second process withdrawal hole; 34-first mounting bolt; 35-pressure cover; 36-second lifting ear; 37-fastener; 4-steel spring assembly; 41-clamp; 411-through hole; 42-lower clamp; 421-first threaded hole; 43-steel spring; 44-process bolt; 5-positioning pull rod; 51-bending part; 6-adjusting pad; 7-anti-vibration rubber; 8-suspender rod; 9-primary vertical shock absorber. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The core of the present invention is to provide a primary suspension system, which can achieve the decoupling of stiffness in three directions, vertical, longitudinal and lateral, in a small structural space. Another core of the present invention is to provide a rail vehicle including the primary suspension system, which can achieve the decoupling of stiffness in three directions, vertical, longitudinal and lateral, in a small structural space.

[0043] Please refer to Figure 1 An embodiment of the present invention provides a first-order suspension system, including a frame 1, an axle box body 2, a rubber node assembly 3, two steel spring assemblies 4 and a positioning rod 5. The axle box body 2 is arranged on the inner side of the side beam of the frame 1; the rubber node assembly 3 and the two steel spring assemblies 4 are both connected between the top of the axle box body 2 and the frame 1, and the rubber node assembly 3 is used to provide longitudinal and lateral positioning stiffness and release vertical stiffness; the two steel spring assemblies 4 are respectively located on both sides of the rubber node assembly 3, and are used to provide vertical stiffness; the positioning rod 5 is connected between the bottom of the axle box body 2 and the frame 1, and the positioning rod 5 is used to provide longitudinal stiffness and release vertical stiffness and lateral stiffness.

[0044] It can be understood that the steel spring assembly 4 provides vertical stiffness and releases lateral stiffness and longitudinal stiffness, and the rubber node assembly 3 provides lateral stiffness and longitudinal stiffness and releases vertical stiffness. It can be seen that by setting the steel spring assembly 4 and the rubber node assembly 3, the vertical stiffness is decoupled from the lateral stiffness and longitudinal stiffness respectively. In addition, the positioning rod 5 provides longitudinal stiffness and releases vertical stiffness and lateral stiffness, that is, the lateral stiffness of the primary suspension system is provided by the rubber node assembly 3, and the longitudinal stiffness of the primary suspension system is provided by the rubber node assembly 3 and the positioning rod 5. The positioning rod 5 can make up for the lack of longitudinal stiffness without participating in the lateral positioning constraint, that is, the primary suspension system realizes the decoupling of vertical stiffness, lateral stiffness and longitudinal stiffness, and can make the stiffness in the three directions of vertical, longitudinal and lateral be realized independently, thereby satisfying the primary suspension system with smaller vertical stiffness, larger longitudinal stiffness and more moderate lateral stiffness between the vertical stiffness and the longitudinal stiffness, so as to ensure sufficient wheelset axle box positioning stiffness and smaller vertical stiffness, ensure the critical speed and ride comfort of the vehicle, and meet the high-speed stability and smoothness requirements of the vehicle.

[0045] In addition, in the embodiment of the present invention, the rubber node assembly 3 and the two steel spring assemblies 4 are both arranged on the top of the axle box body 2, so that the rubber node assembly 3 becomes an axle box top rubber node assembly 3, and the steel spring assembly 4 becomes an axle box top steel spring assembly 4. This arrangement has a compact structure and occupies a small space. In addition, the axle box top rubber node assembly 3 and the axle box top steel spring assembly 4 are also conducive to operating the rubber node assembly 3 and the steel spring assembly 4 from the top of the frame 1, which is particularly suitable for the axle box built-in bogie and the installation of the first-line suspension system is limited by the drive system, thereby facilitating the improvement of process convenience. Moreover, the number of steel spring assemblies 4 is two, and the two steel spring assemblies 4 are respectively arranged on both sides of the rubber node assembly 3 along the longitudinal direction, which can achieve a larger vertical bearing capacity in a small lateral space. And the steel spring assembly 4 has a linear vertical stiffness.

[0046] Also, please refer to Figure 1 and Figure 2In order to adapt to the difference in working height of the steel spring assembly 4 under different loads, in some embodiments, an adjustment pad 6 is provided between the steel spring assembly 4 and the top of the shaft box body 2; the steel spring assembly 4 includes an upper clamping plate 41, a lower clamping plate 42 and a steel spring 43 connected between the upper clamping plate 41 and the lower clamping plate 42, the upper clamping plate 41 is connected to the frame 1, and the upper clamping plate 41 is provided with a through hole 411, and the upper end of the lower clamping plate 42 is provided with a first threaded hole 421, and the first threaded hole 421 is used for screwing in the process bolt 44, so as to increase, decrease or replace the adjustment pad 6 by changing the vertical position of the lower clamping plate 42. That is to say, by arranging different thicknesses or different numbers of adjustment pads 6 between the steel spring assembly 4 and the top of the shaft box body 2, the steel spring assembly 4 can adapt to different loads and have different working heights. Specifically, when the adjustment pad 6 needs to be adjusted, the process bolt 44 is passed through the through hole 411 of the upper clamping plate 41 and screwed into the first threaded hole 421 at the upper end of the lower clamping plate 42. The process bolt 44 cooperates with the first threaded hole 421, so that when the knob process bolt 44 is turned, the lower clamping plate 42 is lifted up, thereby increasing, decreasing or replacing the adjustment pad 6 in the small space. This structure allows the adjustment of the adjustment pad 6 to be achieved by operating from above the frame 1, making the adjustment operation of the adjustment pad 6 in a small space convenient.

[0047] For further information, please refer to Figure 1 and Figure 2 In some embodiments, an anti-vibration rubber 7 is provided between the adjustment pad 6 and the lower clamping plate 42. That is, in this embodiment, the anti-vibration rubber 7 is used to reduce vibration of the steel spring assembly 4, so as to improve the vertical vibration reduction effect.

[0048] Please continue to refer to Figure 1 and Figure 2 In order to further improve the vertical vibration reduction effect, in some embodiments, a vertical vibration damper 9 is provided between the frame 1 and the axle box 2.

[0049] In addition, the above embodiment does not limit the specific connection method between the steel spring assembly 4 and the axle box body 2, as long as the connection between the steel spring assembly 4 and the axle box body 2 can be achieved. In some embodiments, a limiting hole is provided at the lower part of the lower clamping plate 42, and a limiting protrusion is provided at the top of the axle box body 2, and the limiting protrusion is matched and connected with the limiting hole. That is, during installation, the limiting hole and the limiting protrusion are matched and plugged to achieve the connection between the steel spring assembly 4 and the axle box body 2. This connection method is simple and convenient, and the installation is convenient.

[0050] In addition, the above embodiment does not limit the specific connection method between the steel spring assembly 4 and the frame 1, as long as the connection between the steel spring assembly 4 and the frame 1 can be achieved.

[0051] Please refer to Figure 1In some embodiments, the frame 1 is provided with a cavity 11, the steel spring assembly 4 is provided in the cavity 11, a box-type structure 111 is formed at the top of the cavity 11, and the top of the steel spring assembly 4 is provided in the box-type structure 111 and abuts against the top inner wall of the box-type structure 111. That is to say, in this embodiment, the steel spring assembly 4 is provided in the cavity 11 of the frame 1, which is beneficial to space utilization; and by forming the box-type structure 111 at the top of the cavity 11, the top of the steel spring assembly 4 is constrained and limited by the box-type structure 111. At the same time, the top of the steel spring assembly 4 abuts against the top inner wall of the box-type structure 111, avoiding the top of the steel spring assembly 4 from directly contacting the upper cover plate of the frame 1, thereby avoiding the vertical force of the steel spring assembly 4 from directly acting on the upper cover plate, thereby improving the structural strength of the frame 1.

[0052] In addition, the above embodiment does not limit the specific structure of the rubber node assembly 3, as long as the rubber node assembly 3 can be connected to the frame 1 and the axle box 2 respectively.

[0053] Please refer to Figure 1 , Figure 2 and Figure 4 In some embodiments, the rubber node assembly 3 includes a rubber node 31, a frame side mounting seat 32 and an axle box side mounting seat 33, the rubber node 31 includes a core shaft 311 and a rubber part 312 arranged on the outer periphery of the core shaft 311, and the upper end of the core shaft 311 has a tapered guide column 3111; the frame side mounting seat 32 is connected to the frame 1, and the frame side mounting seat 32 is provided with an inner conical hole, and the inner conical hole is matched with the tapered guide column 3111; the axle box side mounting seat 33 is connected to the axle box body 2 and is connected to the outer periphery of the rubber part 312, the axle box side mounting seat 33 is provided with a positioning hole, and the axle box body 2 is provided with a positioning boss 21 that cooperates with the positioning hole for positioning. That is to say, in this embodiment, the rubber node assembly 3 is connected to the frame 1 through the frame side mounting seat 32, and is connected to the axle box body 2 through the axle box side mounting seat 33; at the same time, the frame side mounting seat 32 is connected to the tapered guide column 3111 through the inner tapered hole to achieve the connection between the frame side mounting seat 32 and the rubber node 31; the axle box side mounting seat 33 is connected to the outer periphery of the rubber part 312; in addition, during installation, the axle box side mounting seat 33 and the axle box body 2 can be quickly installed and positioned by the cooperation between the positioning hole and the positioning boss 21, and at the same time, the positioning and anti-shearing functions are achieved by the cooperation between the positioning boss 21 and the positioning hole.

[0054] In order to improve the reliability of the connection, in some embodiments, the axle box side mounting seat 33 is connected to the outer periphery of the rubber part 312 by interference fit; the inner tapered hole is connected to the tapered guide column 3111 by interference fit.

[0055] Also, please refer to Figure 1 and Figure 4In order to further improve the reliability of connection and the convenience of disassembly, in some embodiments, the frame side mounting seat 32 is provided with a first process withdrawal hole 321 connected to the inner conical hole, and the top of the conical guide column 3111 is provided with a second threaded hole. The rubber node assembly 3 also includes a first mounting bolt 34, which passes through the first process withdrawal hole 321 and is connected to the second threaded hole. The head of the first mounting bolt 34 is pressed on the frame 1 through a pressure cap 35. The first process withdrawal hole 321 is used for the first process withdrawal part to pass through during disassembly, so as to apply a vertical downward force to the top of the core shaft 311, so that the core shaft 311 is separated from the frame side mounting seat 32. That is, in this embodiment, the first mounting bolt 34 is connected to the second threaded hole, and the head of the first mounting bolt 34 is pressed on the frame 1 through the pressure cap 35, so as to improve the tightness of the conical guide column 3111 and the inner conical hole, thereby improving the reliability of the connection between the rubber node assembly 3 and the frame 1. In addition, in order to facilitate the disassembly of the rubber node assembly 3, the present embodiment is provided with a first process withdrawal hole 321 on the frame side mounting seat 32. During disassembly, the first process withdrawal piece is passed through the first process withdrawal hole 321, so that the first process withdrawal hole 321 abuts against the top of the mandrel 311 and applies a vertical downward force to the top of the mandrel 311, so that the mandrel 311 is separated from the inner conical hole. It should be noted that the present embodiment does not limit the specific structure of the first process withdrawal hole 321 and the first process withdrawal piece. In some embodiments, the first process withdrawal hole 321 is a threaded hole, and the first process withdrawal piece is a process withdrawal bolt. By screwing the process withdrawal bolt into the threaded hole, the end of the process withdrawal bolt pushes downward against the top of the mandrel 311, so as to achieve the separation of the mandrel 311 from the inner conical hole.

[0056] In addition, the above embodiment does not limit the connection method between the axle box side mounting seat 33 and the axle box body 2, as long as the connection between the two can be achieved. Figure 3 In some embodiments, the axle box side mounting seat 33 is connected to the axle box body 2 via a fastener 37, for example, via a second mounting bolt.

[0057] In addition, in order to facilitate the removal of the axle box side mounting seat 33 and the axle box body 2, please continue to refer to Figure 3 In some embodiments, the axle box side mounting seat 33 is provided with a second process withdrawal hole 331, which is used for the second process withdrawal part to pass through to push the axle box body 2 during disassembly. Further, in some embodiments, the second process withdrawal hole 331 is a threaded hole, and the second process withdrawal part is a process withdrawal bolt. It should be noted that the specific number of the second process withdrawal holes 331 is not limited in this embodiment, and the number of the second process withdrawal holes 331 can be one or at least two.

[0058] In some embodiments, there is a preset distance between the bottom of the mandrel 311 and the top of the shaft box 2, so that when the vertical displacement of the primary suspension system exceeds the preset value, the mandrel 311 and the shaft box 2 are in contact and limited. That is to say, in this embodiment, the vertical displacement of the primary suspension system is limited by the preset distance between the bottom of the mandrel 311 and the top of the shaft box 2. When the vertical displacement of the primary suspension system is less than the preset value, it indicates that the vertical displacement is a normal displacement of the primary suspension system. At this time, the preset distance between the bottom of the mandrel 311 and the top of the shaft box 2 allows the primary suspension system to generate the required vertical displacement. When the vertical displacement of the primary suspension system exceeds the preset value, it indicates that the primary suspension system has an abnormal vertical displacement. The bottom of the mandrel 311 contacts the shaft box 2, and the two stop and limit to prevent the primary suspension system from continuing to generate vertical displacement and abnormality. That is, the space with a preset distance between the bottom of the mandrel 311 and the top of the shaft box 2 constitutes the vertical displacement travel space of the primary suspension system.

[0059] Also, please refer to Figure 4 In order to realize the lifting function of the wheelset, in some embodiments, the frame 1 is provided with a first lifting lug 12, the outer periphery of the rubber node assembly 3 is provided with a second lifting lug 36, and the first suspension system further includes a suspension rod 8, which is used to connect with the first lifting lug 12 and the second lifting lug 36 respectively to lift the axle box 2. That is to say, this embodiment proposes to set the second lifting lug 36 on the outer periphery of the rubber node assembly 3, and indirectly realize the lifting function of the axle box 2 and the wheelset arranged in the axle box 2 by lifting the rubber node assembly 3 by the suspension rod 8. For the axle box built-in bogie in which the axle box 2 is arranged on the inner side of the frame 1, it is convenient to lift the axle box 2 in a small space, making the structure compact. Moreover, the rubber node assembly 3 and the two steel spring assemblies 4 are arranged between the top of the axle box 2 and the frame 1, which improves the connection strength between the axle box 2 and the frame 1. Therefore, setting the second lifting lug 36 on the outer periphery of the rubber node assembly 3 can also meet the lifting strength requirements.

[0060] Further, in some embodiments, the suspension rod 8 includes a first suspension rod and a second suspension rod symmetrically arranged about the rubber node assembly 3, one of the first suspension rod and the second suspension rod is a fixed-length suspension rod, and the other is a length-adjustable suspension rod. For example, the first suspension rod is a fixed-length suspension rod, and the second suspension rod is a length-adjustable suspension rod, that is, in this embodiment, the length of the adjustable suspension rod can be adjusted so that the length-adjustable suspension rod can be adapted to the fixed-length suspension rod, thereby ensuring the smoothness during the lifting and installation, and avoiding the first suspension rod and the second suspension rod from being unable to be installed smoothly due to installation errors, etc. It should be noted that this embodiment does not specifically limit the length adjustment method of the length-adjustable suspension rod, as long as its length is adjustable. For example, in some embodiments, the length-adjustable suspension rod includes a first connecting rod, a second connecting rod, and a double-headed threaded rod threadedly connected to the first connecting rod and the second connecting rod, respectively, the first connecting rod is used to connect to the first lifting ear 12, and the second connecting rod is used to connect to the second lifting ear 36, and the length of the length-adjustable suspension rod is adjusted by adjusting the length of the double-headed threaded rod threadedly engaged with the first connecting rod and the second connecting rod, respectively. The structure is simple and easy to implement.

[0061] Also, please refer to Figure 3 In some embodiments, the positioning rod 5 has a bending portion 51. That is, in this embodiment, the positioning rod 5 has a bending portion 51, and the bending portion 51 is used to avoid the installation space of other components, thereby avoiding interference between the positioning rod 5 and other components.

[0062] In addition to the above-mentioned primary suspension system, the present invention also provides a rail vehicle including the primary suspension system disclosed in the above-mentioned embodiment. For the structures of other parts of the rail vehicle, please refer to the relevant technology and will not be described in detail herein.

[0063] The key point of this embodiment is that the primary suspension system disclosed in any one of the above embodiments has the same beneficial effects as the above primary suspension system, which will not be repeated here.

[0064] It should also be noted that, in this specification, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0065] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0066] The above is a detailed introduction to the first-stage suspension system and rail vehicle provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A primary suspension system, characterized in that: include: Framework (1); An axle box body (2) is arranged on the inner side of the side beam of the frame (1); A rubber node assembly (3) connected between the top of the axle box (2) and the frame (1) and used to provide longitudinal and transverse positioning stiffness and release vertical stiffness; Two steel spring assemblies (4) are connected between the top of the axle box (2) and the frame (1), and the two steel spring assemblies (4) are respectively located on both sides of the rubber node assembly (3) in the longitudinal direction, for providing vertical stiffness; A positioning rod (5) is connected between the bottom of the axle box (2) and the frame (1) and is used to provide longitudinal rigidity and release vertical rigidity and lateral rigidity.

2. The primary suspension system according to claim 1, characterized in that: An adjustment pad (6) is provided between the steel spring assembly (4) and the top of the axle box body (2); The steel spring assembly (4) comprises an upper clamping plate (41), a lower clamping plate (42) and a steel spring (43) connected between the upper clamping plate (41) and the lower clamping plate (42), wherein the upper clamping plate (41) is connected to the frame (1), and the upper clamping plate (41) is provided with a through hole (411), and the upper end of the lower clamping plate (42) is provided with a first threaded hole (421), and the first threaded hole (421) is used for screwing in a process bolt (44) so ​​as to increase, decrease or replace the adjustment pad (6) by changing the vertical position of the lower clamping plate (42).

3. The primary suspension system according to claim 1, characterized in that: The frame (1) is provided with a cavity (11), the steel spring assembly (4) is arranged in the cavity (11), the top of the cavity (11) forms a box-shaped structure (111), the top of the steel spring assembly (4) is arranged in the box-shaped structure (111) and abuts against the top inner wall of the box-shaped structure (111).

4. The primary suspension system according to any one of claims 1 to 3, characterized in that: The rubber node assembly (3) comprises: A rubber node (31) comprises a core shaft (311) and a rubber portion (312) arranged on the outer periphery of the core shaft (311), wherein the upper end of the core shaft (311) has a tapered guide column (3111); A frame side mounting seat (32) connected to the frame (1) and provided with an inner conical hole, wherein the inner conical hole is cooperatively connected to the conical guide column (3111); The axle box side mounting seat (33) is connected to the axle box body (2) and to the outer periphery of the rubber part (312), and is provided with a positioning hole, and the axle box body (2) is provided with a positioning boss (21) that cooperates with the positioning hole for positioning.

5. The primary suspension system according to claim 4, characterized in that: The frame side mounting seat (32) is provided with a first process withdrawal hole (321) communicating with the inner conical hole, and the top of the conical guide column (3111) is provided with a second threaded hole. The rubber node assembly (3) further comprises: A first mounting bolt (34) passes through the first process withdrawal hole (321) and is connected to the second threaded hole, and the head of the first mounting bolt (34) is pressed onto the frame (1) through a pressure cover (35); The first process withdrawal hole (321) is used to allow the first process withdrawal part to pass through during disassembly, so as to apply a vertical downward force to the top end of the core shaft (311) to separate the core shaft (311) from the frame side mounting seat (32).

6. The primary suspension system according to claim 4, characterized in that: There is a preset distance between the bottom of the core shaft (311) and the top of the axle box (2), so that when the vertical displacement of the primary suspension system exceeds a preset value, the core shaft (311) and the axle box (2) are brought into contact and limited position.

7. The primary suspension system according to any one of claims 1 to 3, characterized in that: The frame (1) is provided with a first lifting lug (12), the outer periphery of the rubber node assembly (3) is provided with a second lifting lug (36), and further comprises: A lifting rod (8) is used to be connected to the first lifting eye (12) and the second lifting eye (36) respectively, so as to lift the axle box (2).

8. The primary suspension system according to claim 7, characterized in that: The suspension rod (8) comprises a first suspension rod and a second suspension rod which are symmetrically arranged with respect to the rubber node assembly (3); one of the first suspension rod and the second suspension rod is a fixed-length suspension rod, and the other is a length-adjustable suspension rod.

9. The primary suspension system according to any one of claims 1 to 3, characterized in that: The positioning pull rod (5) has a bending portion (51).

10. A rail vehicle, characterized in that: A primary suspension system comprising any one of claims 1-9.

Images