Anti-roll torsion bar device and rail vehicle

Abstract

This disclosure provides an anti-roll torsion bar device and a vehicle, relating to the field of rail transit vehicle technology. The anti-roll torsion bar device includes: a torsion bar shaft; two swing arm assemblies, each swing arm assembly including: a mounting sleeve; and a mounting arm, a first end of which is connected to the mounting sleeve, and a second end of which is adapted for rotatable connection with a connecting seat; two expansion sleeves, respectively installed between the two ends of the torsion bar shaft and the inner walls of the two mounting sleeves, the expansion sleeves being configured to fix the torsion bar shaft and the mounting sleeves by radial expansion; and two support seats, respectively rotatably connected to the two ends of the torsion bar shaft and adapted for fixed connection with the vehicle body underframe. By generating radial expansion through the expansion sleeves to fix the mounting sleeves and the torsion bar shaft, when the vehicle undergoes roll motion, the anti-roll strength of the vehicle is increased, the roll angle of the vehicle is limited, and the lateral stability and anti-roll capability of the vehicle are enhanced.

Description

Technical Field

[0001] This disclosure relates to the field of rail transit vehicle technology, and more specifically, to an anti-roll torsion bar device and a rail vehicle. Background Technology

[0002] With the rapid development of quasi-high-speed, high-speed railways, and urban rail vehicles, drivers and passengers have increasingly higher requirements for vehicle comfort and safety. Currently, air springs are widely used in the suspension systems of rail vehicles. Due to their adjustable stiffness and relatively constant low natural vibration frequency, they can improve the ride smoothness of rail vehicles during operation. However, because of the differential pressure valves at both ends of the air spring, the roll angle of the rail vehicle can easily increase when passing through curves (such as sections of the track that form curves). Therefore, this problem can be overcome by configuring anti-roll torsion bar devices.

[0003] Anti-roll torsion bar devices are mainly installed between the car body and bogie of rail vehicles. When the vehicle rolls, the torsion bar shaft of the anti-roll torsion bar device undergoes torsional deformation, generating a torque through connecting rods and other components to resist the vehicle's roll motion. This increases the vehicle's anti-roll stiffness, limits the vehicle's roll angle, restricts the vehicle's operation within a specified clearance range, and ensures safe vehicle operation.

[0004] Among them, the anti-roll torsion bar device mainly includes a torsion bar shaft and a torsion arm. The existing torsion bar shaft and torsion arm cannot be effectively connected and cannot effectively resist the rolling motion of the vehicle. Summary of the Invention

[0005] In view of this, the present disclosure provides an anti-roll torsion bar device and a vehicle to enhance the lateral stability and anti-roll capability of the vehicle.

[0006] One aspect of this disclosure provides an anti-roll torsion bar device, comprising: a torsion bar shaft; two swing arm assemblies, each swing arm assembly including: a mounting sleeve; and a mounting arm, a first end of the mounting arm being connected to the mounting sleeve, and a second end of the mounting arm being adapted for rotatable connection with a connecting seat; two expansion sleeves respectively mounted between the two ends of the torsion bar shaft and the inner walls of the two mounting sleeves, the expansion sleeves being configured to fix the torsion bar shaft to the mounting sleeves by radial expansion; and two support seats respectively rotatably connected to the two ends of the torsion bar shaft and adapted for fixed connection with a vehicle body underframe.

[0007] According to embodiments of this disclosure, each of the expansion sleeves includes: an outer ring, the axial section of the sidewall of the outer ring being a tapered inclined surface; at least two inner rings, the axial section of the sidewall of the inner ring being a mating tapered inclined surface that mates with the tapered inclined surface of the outer ring, each inner ring having a plurality of threaded holes extending in the axial direction and evenly spaced in the circumferential direction; and a plurality of fastening bolts, which pass through the threaded holes and are threadedly connected to the inner rings, so that by rotating the fastening bolts, two adjacent inner rings are brought closer together in the axial direction, thereby expanding the torsion bar shaft and the mounting sleeve.

[0008] According to an embodiment of this disclosure, an isolation ring is provided inside the outer ring, the isolation ring protruding radially inward from the middle of the inner wall of the outer ring, the tapered slope includes two sub-tapered tapered slopes that gradually thicken from both ends of the outer ring toward the isolation ring, each of the expansion sleeves includes two inner rings, the mating tapered slopes of the inner rings mating with the sub-tapered tapered slopes.

[0009] According to embodiments of the present disclosure, each of the mounting arms includes: a rotating arm extending radially integrally from the outer wall of the mounting sleeve; and a connecting rod, a first end of the connecting rod being adapted for rotatable connection with the connecting seat, and a second end of the connecting rod being rotatably connected to the free end of the rotating arm.

[0010] According to an embodiment of this disclosure, a limiting ring is provided on the inner wall of the inner side of the mounting sleeve, and the limiting ring is configured to restrict the expansion sleeve from disengaging from the mounting sleeve in an axially inward direction.

[0011] According to an embodiment of this disclosure, the swing arm assembly further includes an end cap disposed on the outside of the mounting sleeve and configured to close the outside of the mounting sleeve. Preferably, at least a portion of the end cap is made of a transparent material.

[0012] According to an embodiment of this disclosure, the support seat is located on the inner side of the swing arm assembly on the torsion bar shaft, and the torsion bar shaft has an inner concave annular groove at the position between the support seat and the swing arm assembly.

[0013] According to an embodiment of this disclosure, the support base is rotatably connected to the torsion bar shaft via a bearing.

[0014] According to an embodiment of this disclosure, the anti-roll torsion bar device further includes a sealing ring, the two ends of which are respectively tightly fitted to the end of the support base and the mounting sleeve.

[0015] Another aspect of this disclosure provides a vehicle including: a connecting seat; a vehicle chassis; and an anti-roll torsion bar device as described in any of the above embodiments, wherein the swing arm assembly connects the torsion bar shaft and the connecting seat, and the support seat connects the torsion bar shaft and the vehicle chassis.

[0016] According to embodiments of this disclosure, a shrink sleeve is installed between the two ends of the torsion bar shaft and the inner walls of two mounting sleeves, causing the shrink sleeve to expand radially to fix the mounting sleeves and the torsion bar shaft in place. When the vehicle rolls, the torsion bar shaft undergoes torsional deformation, generating a torque through the swing arm assembly to resist the vehicle's roll motion. This increases the vehicle's roll resistance, limits the vehicle's roll angle, enhances the vehicle's lateral stability and roll resistance, ensures vehicle operation safety, and improves driving safety and comfort. Attached Figure Description

[0017] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 A side view of an anti-roll torsion bar device according to an embodiment of the present disclosure is shown schematically;

[0019] Figure 2 Schematic illustration Figure 1 Cross-sectional view at point AA of a partial structure of the anti-roll torsion bar device;

[0020] Figure 3 Schematic illustration Figure 1 Exploded view of part of the structure of the anti-roll torsion bar device;

[0021] Figure 4 A perspective view of an anti-roll torsion bar device according to an embodiment of the present disclosure is shown schematically.

[0022] Figure 5 A perspective view illustrating the connection between the mounting sleeve and the swing arm of the anti-roll torsion bar device according to an embodiment of the present disclosure is shown.

[0023] Figure 6 Schematic illustration Figure 5 A sectional view of the sleeve being installed in the middle;

[0024] Figure 7 A perspective view of the expansion sleeve of the anti-roll torsion bar device according to an embodiment of the present disclosure is shown schematically;

[0025] Figure 8 An exploded view of the expansion sleeve of the anti-roll torsion bar device according to an embodiment of the present disclosure is shown schematically; and

[0026] Figure 9 Schematic illustration Figure 8 The cross-sectional view of the expansion sleeve shown;

[0027] Figure 10 An exploded view schematically illustrates another expansion sleeve of the anti-roll torsion bar device according to an embodiment of the present disclosure;

[0028] Figure 11 Schematic illustration Figure 10 The cross-sectional view of the expansion sleeve shown;

[0029] Figure 12 An exploded view schematically illustrates another expansion sleeve of the anti-roll torsion bar device according to an embodiment of the present disclosure;

[0030] Figure 13 Schematic illustration Figure 12 The cross-sectional view of the expansion sleeve shown;

[0031] Figure 14 An exploded view schematically illustrates another expansion sleeve of the anti-roll torsion bar device according to an embodiment of the present disclosure;

[0032] Figure 15 Schematic illustration Figure 14 The cross-sectional view of the expansion sleeve is shown.

[0033] Figure label:

[0034] 1. Torsion bar shaft;

[0035] 11. Concave annular groove;

[0036] 2. Swing arm assembly;

[0037] 21. Install the sleeve;

[0038] 211. Limiting ring;

[0039] 22. Install the arm;

[0040] 221. Rotary arm;

[0041] 222. Connecting rod;

[0042] 3. Expansion sleeve;

[0043] 31. Outer ring road;

[0044] 311. Isolation ring;

[0045] 32. Inner Ring Road;

[0046] 321. Threaded hole;

[0047] 322, First Inner Ring;

[0048] 323, Second Inner Ring Road;

[0049] 33. Tighten the bolts;

[0050] 4. Support base;

[0051] 5. End caps;

[0052] 6. Bearings;

[0053] 7. Sealing ring. Detailed Implementation

[0054] The embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0055] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0056] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0057] When expressions such as "at least one of A, B, and C, etc." are used, they should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0058] During the operation of rail vehicles, the vehicle body mainly has six degrees of freedom: extension and contraction vibration along the X-axis (length), yaw vibration along the Y-axis (width), heave vibration along the Z-axis (height), roll vibration around the X-axis, pitching vibration around the Y-axis, and yaw vibration around the Z-axis. To meet the comfort and safety requirements of the driver and passengers, air springs are often installed on the rail vehicle body. Due to their high flexibility coefficient in the Z-axis, they can significantly absorb high-frequency vibrations of the rail vehicle in the Z-axis, and the noise generated during vibration absorption is also very low. However, due to the differential pressure valves at both ends of the air springs, the roll angle increases when the rail vehicle passes through curves (such as the curved sections of the track). Therefore, anti-roll torsion bar devices can be installed to increase the vehicle's anti-roll stiffness, limit the vehicle's roll angle, restrict the vehicle's operation within a specified range, and ensure vehicle operation safety.

[0059] Anti-roll torsion bar devices mainly include a torsion bar shaft, torsion arms, connecting rods, and rubber pads. During the operation of a rail vehicle, when the left and right air springs undergo opposite vertical displacements (i.e., the vehicle body rolls), the two torsion arms at both ends of the torsion bar shaft apply opposing forces and torques to the torsion bar shaft. This causes the torsion bearing to undergo torsional elastic deformation under torque, acting as a torsion bar spring. The counter-torsion torque of the torsion bar spring is always opposite to the direction of the roll angle displacement of the vehicle body, thus restraining the roll motion of the vehicle body. Existing torsion bar shafts and torsion arms cannot achieve an effective connection and cannot effectively resist the roll motion of the vehicle.

[0060] Figure 1 A side view of an anti-roll torsion bar device according to an embodiment of the present disclosure is shown schematically; Figure 2 Schematic illustration Figure 1 Cross-sectional view at point AA of a partial structure of the anti-roll torsion bar device; Figure 3 Schematic illustration Figure 1 Exploded view of part of the structure of the anti-roll torsion bar device; Figure 4 A perspective view of an anti-roll torsion bar device according to an embodiment of the present disclosure is shown schematically.

[0061] See Figures 1 to 4The present disclosure provides an anti-roll torsion bar device, comprising: a torsion bar shaft 1, two swing arm assemblies 2, a tensioning sleeve 3, and two support seats 4. Each swing arm assembly 2 includes a mounting sleeve 21 and a mounting arm 22, the first end of the mounting arm 22 being connected to the mounting sleeve 21, and the second end of the mounting arm 22 being adapted to be rotatably connected to a connecting seat; the two tensioning sleeves 3 are respectively installed between the two ends of the torsion bar shaft 1 and the inner walls of the two mounting sleeves 21, and the tensioning sleeves 3 are configured to fix the torsion bar shaft 1 to the mounting sleeves 21 by radial tension; the two support seats 4 are respectively rotatably connected to the two ends of the torsion bar shaft 1 and are adapted to be fixedly connected to the vehicle chassis frame.

[0062] According to embodiments of this disclosure, the torsion bar 1 is capable of withstanding torque generated during vehicle roll and transmitting it to the swing arm assemblies 2 on both sides. The torsion bar 1 can be supported by a high-strength, high-rigidity material to ensure that the torsion bar 1 is not easily deformed or broken when subjected to large torques.

[0063] According to embodiments of this disclosure, the support base 4 stably supports the torsion bar shaft 1 on the vehicle chassis and allows it to rotate about its axis. The support base 4 can be fixedly connected to the vehicle chassis by bolts.

[0064] According to embodiments of this disclosure, the expansion sleeve 3 generates pressure and friction between the contact surfaces in the connection between the torsion bar shaft 1 and the mounting sleeve 21, thereby achieving the connection for load transmission.

[0065] According to the embodiments of this disclosure, the expansion sleeve 3 is installed between the two ends of the torsion bar shaft 1 and the inner walls of the two mounting sleeves 21, and the expansion sleeve 3 expands radially to fix the mounting sleeves 21 and the torsion bar shaft 1. When the vehicle rolls, the torsion bar shaft 1 undergoes torsional deformation, and generates a torque to resist the vehicle's roll through the swing arm assembly 2, thereby increasing the vehicle's anti-roll strength, limiting the vehicle's roll angle, enhancing the vehicle's lateral stability and anti-roll capability, ensuring vehicle operation safety, and improving driving safety and comfort.

[0066] Currently, the torsion bar shaft and torsion arm of the anti-roll torsion bar device are mainly assembled using an interference fit.

[0067] For example, the torsion bar shaft is set to a cylindrical shape, and the torsion arm is provided with a corresponding cylindrical hole. The torsion bar shaft and the torsion arm are connected by an interference fit (cold fitting and hot fitting, etc.).

[0068] Alternatively, an external spline can be provided at the end of the torsion bar shaft, and an internal spline can be provided on the torsion arm, with the external and internal splines interfering with each other.

[0069] For example, a conical surface can be provided at the end of the torsion bar shaft, and a conical hole can be provided in the torsion arm. The torsion bar shaft and the torsion arm can then be connected by axial force.

[0070] However, all of the above assembly methods have their own problems. The interference fit connection method requires special equipment, the installation process is complicated, and the performance of the connection structure may change because the temperature of the connection structure needs to be changed. The spline connection method has a more complicated processing technology for splines and is more expensive. The method of using conical surface and conical hole requires hydraulic installation, which also requires special equipment, and the process is also more complicated.

[0071] In view of this, the present disclosure provides the following structural design for an anti-roll torsion bar device, in order to partially solve the problems of difficult processing, high cost and complex process of current anti-roll torsion bar devices.

[0072] Figure 7 A perspective view of the expansion sleeve of the anti-roll torsion bar device according to an embodiment of the present disclosure is shown schematically; Figure 8 An exploded view of the expansion sleeve of the anti-roll torsion bar device according to an embodiment of the present disclosure is shown schematically. Figure 9 Schematic illustration Figure 8 The cross-sectional view of the expansion sleeve is shown.

[0073] See Figures 7 to 9 According to embodiments of this disclosure, each expansion sleeve 3 includes an outer ring 31, at least two inner rings 32, and a plurality of fastening bolts 33. The axial section of the sidewall of the outer ring 31 is a tapered inclined surface. In some embodiments, the outer wall surface of the outer ring 31 is formed as a cylindrical surface with a substantially constant outer diameter, and the inner wall surface is formed as a tapered inclined surface. The axial section of the sidewall of the inner ring 32 is a mating tapered inclined surface that mates with the tapered inclined surface of the outer ring 31. In some embodiments, the outer wall surface of the inner ring 32 is formed as a tapered inclined surface, and the inner wall surface is formed as a cylindrical surface with a substantially constant inner diameter, which mates with the cylindrical structure with a substantially constant outer diameter at both ends of the torsion bar shaft 1. Each inner ring 32 is provided with a plurality of threaded holes 321 extending in the axial direction and evenly opened in the circumferential direction. The plurality of fastening bolts 33 pass through the threaded holes 321 and are threadedly connected to the inner ring 32, so that by rotating the fastening bolts 33, two adjacent inner rings 32 are brought closer together in the axial direction, thereby expanding and tightening the torsion bar shaft 1 and the mounting sleeve 21.

[0074] According to embodiments of this disclosure, the expansion sleeve 3 may include two inner rings 32, the threaded holes 321 of the two inner rings 32 having opposite thread directions, so that under the action of the fastening bolt 33, the two inner rings 32 can move closer to each other (fastened state) or move further apart from each other (released state).

[0075] According to the embodiments of this disclosure, since the sidewalls of both the outer ring 31 and the inner ring 32 are designed as tapered slopes, axial force is generated by rotating the fastening bolt 33. As the two adjacent inner rings 32 approach each other along the axial direction, the tapered slope of the outer ring 31 and the matching tapered slope of the inner ring 32 squeeze each other, generating radial expansion force. This causes the outer ring 31 to expand outward to tighten the mounting sleeve 21, and the inner ring 32 to contract inward to tighten the torsion bar shaft 1, thus achieving a fixed connection between the mounting sleeve 21 and the torsion bar shaft 1. This improves the assembly efficiency of the anti-roll torsion bar device and reduces costs. The expansion sleeve 3 achieves a highly efficient and reliable connection between the torsion bar shaft 1 and the mounting sleeve 21 through precise mechanical fit and bolt fastening.

[0076] See Figure 8 and Figure 9 According to an embodiment of the present disclosure, an isolation ring 311 is provided inside the outer ring 31. The isolation ring 311 protrudes radially inward from the middle of the inner wall of the outer ring 31. The tapered slope includes two sub-tapered tapered slopes that gradually thicken from both ends of the outer ring 31 toward the isolation ring 311. Each expansion sleeve 3 includes two inner rings 32. The mating tapered slope of the inner ring 32 mates with the sub-tapered tapered slope.

[0077] According to an embodiment of this disclosure, the isolation ring 311 forms a central barrier area within the outer ring 31, which not only increases the rigidity of the outer ring 31 but also serves as a separator and support, making the connection between the outer ring 31 and the inner ring 32 more secure. The tensioning force is distributed on the sub-conical inclined surfaces on both sides of the isolation ring 311, enhancing the tensioning effect. The two sub-conical inclined surfaces gradually thicken from both ends of the outer ring 31 towards the isolation ring 311, facilitating the installation of the inner ring 32 within the outer ring 31. According to another embodiment of this disclosure, the tensioning sleeve 3 may further include a cooperating inner conical sleeve and an outer conical sleeve, and a bolt fitted onto the inner conical sleeve. The inner conical sleeve has a contraction-tensioning slot on its wall and threads that mate with the bolt, while the outer conical sleeve has an expansion-tensioning slot on its wall. During installation, the inner tapered sleeve is fitted onto the torsion bar shaft 1, and the mounting sleeve 21 is fitted onto the outer tapered sleeve. The bolts are tightened, and the inner and outer tapered sleeves, which are in a tapered fit with each other, are displaced axially and move closer to each other. The outer tapered sleeve, which has an expansion and tightening slot, is tightened and connected to the mounting sleeve 21, while the inner tapered sleeve, which has a contraction and tightening sleeve, is squeezed and deformed radially, and is fixedly connected to the torsion bar shaft 1.

[0078] Figure 10 An exploded view schematically illustrates another expansion sleeve of the anti-roll torsion bar device according to an embodiment of the present disclosure. Figure 11 Schematic illustration Figure 10 The cross-sectional view of the expansion sleeve is shown.

[0079] Reference Figure 10 and Figure 11As shown, the expansion sleeve 3 includes an outer ring 31 and an inner ring 32. Specifically, one end of the inner ring 32 is fitted inside the outer ring 31, and the inner edge of the outer ring 31 has an inner conical surface. The portion of the inner ring 32 fitted inside the outer ring 31 has an outer conical surface. During installation, the outer ring 31 and the inner ring 32 are sequentially fitted along the axial direction of the torsion bar shaft 1, with the outer conical surface of the inner ring 32 abutting against the inner conical surface of the outer ring. The bolts are tightened, and the inner ring 32 is compressed and deformed radially under the action of the outer conical surface, thus fixing it to the torsion bar shaft 1.

[0080] Figure 12 An exploded view schematically illustrates another expansion sleeve of the anti-roll torsion bar device according to an embodiment of the present disclosure. Figure 13 Schematic illustration Figure 12 The cross-sectional view of the expansion sleeve is shown.

[0081] Reference Figure 12 and Figure 13 As shown, the tightening sleeve 3 includes an outer ring 31, a first inner ring 322, a second inner ring 323, and a separating ring 311. Specifically, one end of the first inner ring 322 and the second inner ring 323 are respectively fitted onto the two axial ends of the outer ring 31. The inner edge of the outer ring 31 is provided with an inner conical surface, and the portions of the first inner ring 322 and the second inner ring 323 fitted inside the outer ring 31 are provided with outer conical surfaces. The first inner ring 322 and the second inner ring 323 are arranged opposite each other, and when a bolt is screwed into the first inner ring 322 and the second inner ring 323, the first inner ring 322 and the second inner ring 323 are brought closer together. Furthermore, the inner edges of the first inner ring 322 and the second inner ring 323 also have inner conical surfaces, and the outer edge of the separating ring 311 has an outer conical surface. During installation, when the bolts are screwed in, the first inner ring 322 and the second inner ring 323 approach each other along the axial direction of the outer ring 31. Then, under the squeezing action of the inner conical surface of the outer ring 31 on the outer conical surface of the first inner ring 322 and the second inner ring 323, the first inner ring 322 and the second inner ring 323 squeeze the isolation ring 311 synchronously through the inner conical surface, so that the inner diameter of the isolation ring 311 shrinks and is fixedly connected to the torsion bar shaft 1.

[0082] Figure 14 An exploded view schematically illustrates another expansion sleeve of the anti-roll torsion bar device according to an embodiment of the present disclosure. Figure 15 Schematic illustration Figure 14 The cross-sectional view of the expansion sleeve is shown.

[0083] Reference Figure 14 and Figure 15As shown, the expansion sleeve 3 includes two outer rings 31, two inner rings 32, and an isolation ring 311. The two outer rings 31 and two inner rings 32 are symmetrically arranged along the axial direction of the isolation ring 311. Specifically, the inner edges of the two outer rings 31 are provided with inner conical surfaces, and the portions of the two inner rings 32 fitted inside the outer rings 31 are provided with outer conical surfaces. Furthermore, the inner edges of the inner rings 32 also have inner conical surfaces, and both axial ends of the outer edge of the isolation ring 311 have outer conical surfaces. During installation, when the bolt is screwed in, the bolt passes sequentially through one inner ring 32, one outer ring 31, the isolation ring 311, another outer ring, and another inner ring. The two inner rings 32 approach each other along the axial direction of the outer ring 31. Under the squeezing action of the inner conical surface of the outer ring 31 against the outer conical surface of the inner ring 32, the two inner rings 32 simultaneously squeeze the isolation ring 311 through their inner conical surfaces, causing the inner diameters at both axial ends of the isolation ring 311 to shrink and be fixedly connected to the torsion bar shaft 1.

[0084] Figure 5 A schematic side view of the connection between the mounting sleeve and the swing arm of the anti-roll torsion bar device according to an embodiment of the present disclosure is shown.

[0085] See Figure 4 and Figure 5 According to embodiments of the present disclosure, each mounting arm 22 includes: a rotating arm 221 extending radially integrally from the outer wall of the mounting sleeve 21; and a connecting rod 222, a first end of which is adapted to be rotatably connected to a connecting seat, and a second end of which is rotatably connected to the free end of the rotating arm 221.

[0086] According to embodiments of this disclosure, the swing arm 221 and the mounting sleeve 21 can be integrally formed, thereby improving the strength and stability of the swing arm 221 and the mounting sleeve 21.

[0087] According to the embodiments of this disclosure, the rotational connection between the swing arm 221, the connecting rod 222 and the connecting seat enables the connecting rod 222 to transmit force and motion between the swing arm 221 and the vehicle body. When the vehicle body undergoes a roll motion, the lateral tilting force generated by the torsion bar shaft 1 is transmitted to the connecting rod 222 through the swing arm 221, and then to the vehicle body, so as to suppress the roll motion of the vehicle body and enhance the lateral stability and anti-roll capability of the vehicle.

[0088] Figure 6 Schematic illustration Figure 5 A sectional view of the sleeve being installed.

[0089] See Figure 2 and Figure 6 According to an embodiment of the present disclosure, a limiting ring 211 is provided on the inner wall of the inner side of the mounting sleeve 21. The limiting ring 211 is configured to restrict the expansion sleeve 3 from disengaging from the mounting sleeve 21 in the axial inward direction.

[0090] According to embodiments of this disclosure, the limiting ring 211 can be annular, semi-annular, or other suitable shapes. The limiting ring 211 and the mounting sleeve 21 can be integrally formed.

[0091] According to the embodiments of this disclosure, the limiting ring 211 ensures that the expansion sleeve 3 is stably held in the mounting sleeve 21, and will not be dislodged from the mounting sleeve 21 due to the axial force of the torsion bar shaft 1, nor will it be accidentally dislodged due to other external factors, thereby achieving the fixation of the expansion sleeve 3.

[0092] See Figure 3 and Figure 4 According to an embodiment of the present disclosure, the swing arm assembly 2 further includes an end cap 5, which is disposed on the outside of the mounting sleeve 21 and configured to close the outside of the mounting sleeve 21. Preferably, at least a portion of the end cap 5 is made of a transparent material.

[0093] According to embodiments of this disclosure, the end cap 5 is connected to the mounting sleeve 21 by bolts or other means.

[0094] According to embodiments of this disclosure, the end cap 5 can be made entirely of transparent material; alternatively, it can be made only of transparent material in the middle of the end cap 5, so that operators can observe the inside of the mounting sleeve 21 without disassembling the end cap 5, thereby improving the convenience and efficiency of maintenance.

[0095] According to embodiments of this disclosure, the transparent material can be a material with good light transmittance and weather resistance. For example, it can be polypropylene or polymethyl methacrylate (i.e., plexiglass).

[0096] According to embodiments of this disclosure, the end cap 5 can prevent dust, moisture or other impurities from entering the interior of the mounting sleeve 21 through the outside of the mounting sleeve 21, protecting the parts inside the mounting sleeve 21 from contamination and damage, thereby improving the durability and reliability of the parts.

[0097] According to an embodiment of the present disclosure, the support base 4 is located inside the swing arm assembly 2 on the torsion bar shaft 1, and the torsion bar shaft 1 has an inner concave annular groove 11 at the position between the support base 4 and the swing arm assembly 2.

[0098] According to embodiments of this disclosure, the concave annular groove 11 serves as a stress dispersion area, which can reduce the degree of local stress concentration and reduce the generation of interference stress.

[0099] According to an embodiment of this disclosure, the support base 4 is rotatably connected to the torsion bar shaft 1 via a bearing 6.

[0100] According to embodiments of this disclosure, the arrangement of bearing 6 ensures that torsion bar shaft 1 rotates smoothly and reliably.

[0101] See Figure 2According to an embodiment of the present disclosure, the anti-roll torsion bar device further includes a sealing ring 7, the two ends of which are tightly fitted with the end of the support base 4 and the mounting sleeve 21, respectively.

[0102] According to an embodiment of this disclosure, the inner wall of the end of the support base 4 is provided with a groove, one end of the sealing ring 7 abuts against the groove at the end of the support base 4, and the other end of the sealing ring 7 abuts against the inner wall of the mounting sleeve 21 and the limiting ring 211, thereby achieving effective fixation of the sealing ring 7.

[0103] According to the embodiments of this disclosure, the sealing ring 7 can prevent external impurities from entering the expansion sleeve 3, ensuring the sealing performance of the anti-roll torsion bar device and improving the reliability and durability of the anti-roll torsion bar device.

[0104] According to the embodiments of this disclosure, the way the tightening sleeve 3 connects the mounting sleeve 21 and the torsion bar shaft 1 simplifies the installation process, simplifies the connection structure between the torsion bar shaft 1 and the swing arm assembly 2, and improves the reliability and durability of the connection, while reducing processing costs.

[0105] Another aspect of this disclosure provides a vehicle including: a connecting seat; a vehicle chassis; and an anti-roll torsion bar device of any of the above embodiments, wherein a swing arm assembly 2 connects the torsion bar shaft 1 and the connecting seat, and a support seat 4 connects the torsion bar shaft 1 and the vehicle chassis.

[0106] According to embodiments of this disclosure, the swing arm assembly 2 can realize the transmission of force and torque between the torsion bar shaft 1 and the vehicle body; the vehicle body chassis effectively supports the torsion bar shaft 1 through the support seat 4. The synergistic effect between the torsion bar shaft 1, the swing arm assembly 2 and the support seat 4 provides the vehicle body with effective anti-roll capability. When the vehicle tends to roll, the torsion bar shaft 1 is subjected to torsional torque, thereby transmitting the force to the vehicle body through the swing arm assembly 2 and the support seat 4, resisting the vehicle's roll tendency and improving the vehicle's stability.

[0107] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. An anti-roll torsion bar device, characterized in that, include: Torsion bar shaft (1); Two swing arm assemblies (2), each of the swing arm assemblies (2) comprising: Install sleeve (21); as well as Mounting arm (22), the first end of which is connected to the mounting sleeve (21), and the second end of which is adapted to be rotatably connected to the connecting seat; Two expansion sleeves (3) are respectively installed between the two ends of the torsion bar shaft (1) and the inner walls of the two mounting sleeves (21). The expansion sleeves (3) are configured to fix the torsion bar shaft (1) and the mounting sleeves (21) by radial expansion; and Two support seats (4) are rotatably connected to both ends of the torsion bar shaft (1) and are suitable for fixed connection with the vehicle body frame.

2. The anti-roll torsion bar device according to claim 1, characterized in that, Each of the aforementioned expansion sleeves (3) includes: Outer ring (31), the axial section of the sidewall of the outer ring (31) is a tapered inclined surface; At least two inner rings (32), the axial section of the sidewall of the inner ring (32) being a mating tapered inclined surface that mates with the tapered inclined surface of the outer ring (31), each inner ring (32) having a plurality of threaded holes (321) extending in the axial direction and evenly opened in the circumferential direction; and Several fastening bolts (33) are threaded through the threaded holes (321) and connected to the inner rings (32) respectively, so that by rotating the fastening bolts (33), the two adjacent inner rings (32) are brought closer together along the axial direction, thereby tightening the torsion bar shaft (1) and the mounting sleeve (21).

3. The anti-roll torsion bar device according to claim 2, characterized in that, The outer ring (31) is provided with an isolation ring (311), which protrudes radially inward from the middle of the inner wall of the outer ring (31). The conical slope includes two sub-conical slopes that gradually thicken from both ends of the outer ring (31) toward the isolation ring (311). Each expansion sleeve (3) includes two inner rings (32), and the mating conical slope of the inner ring (32) mates with the sub-conical slope.

4. The anti-roll torsion bar device according to any one of claims 1-3, characterized in that, Each of the mounting arms (22) includes: The rotating arm (221) extends radially integrally from the outer wall of the mounting sleeve (21); and A connecting rod (222), the first end of which is adapted to be rotatably connected to the connecting seat, and the second end of which is rotatably connected to the free end of the rotating arm (221).

5. The anti-roll torsion bar device according to claim 4, characterized in that, A limiting ring (211) is provided on the inner wall of the inner side of the mounting sleeve (21). The limiting ring (211) is configured to restrict the expansion sleeve (3) from disengaging from the mounting sleeve (21) in the axial inward direction.

6. The anti-roll torsion bar device according to claim 4, characterized in that, The swing arm assembly (2) also includes an end cap (5), which is disposed on the outside of the mounting sleeve (21) and configured to close the outside of the mounting sleeve (21); At least a portion of the end cap (5) is made of a transparent material.

7. The anti-roll torsion bar device according to any one of claims 1-3, characterized in that, The support base (4) is located on the inside of the swing arm assembly (2) on the torsion bar shaft (1), and the torsion bar shaft (1) has an inner concave annular groove (11) between the support base (4) and the swing arm assembly (2).

8. The anti-roll torsion bar device according to claim 7, characterized in that, The support base (4) is rotatably connected to the torsion bar shaft (1) via a bearing (6).

9. The anti-roll torsion bar device according to claim 7, characterized in that, The anti-roll torsion bar device also includes a sealing ring (7), the two ends of which are tightly fitted to the end of the support base (4) and the mounting sleeve (21), respectively.

10. A rail vehicle, characterized in that, include: The vehicle body is equipped with a connecting seat and a vehicle body frame; as well as According to any one of claims 1-9, the anti-roll torsion bar device, the swing arm assembly (2) connects the torsion bar shaft (1) and the connecting seat, and the support seat (4) connects the torsion bar shaft (1) and the vehicle body chassis.

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