Hydraulic cylinder and vehicle

Abstract

The utility model provides a hydraulic cylinder and a vehicle. The hydraulic cylinder is applied to a vehicle and comprises a cylinder body and a vibration reduction assembly installed at one end of the cylinder body. The end, away from the damping assembly, of the cylinder body is connected with a frame of the vehicle. The damping assembly is provided with a connecting hole used for being connected with a cab of the vehicle. The vibration reduction assembly comprises a vibration reduction piece. The vibration reduction piece is arranged around the connecting hole. The vibration damper is provided with a deformation recess. By arranging the deformation concave part on the vibration reduction part, the rigidity of the vibration reduction part is reduced, so that the vibration reduction part is easy to deform, the impact absorption capability of the vibration reduction assembly is enhanced, and the vibration reduction effect is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a hydraulic cylinder and a vehicle. Background Art

[0002] In medium- and heavy-duty trucks, a hydraulic cylinder is connected between the frame and the cab. The extension and retraction of the hydraulic cylinder allows the cab to tilt, facilitating maintenance access to the powertrain area beneath the cab. While the vehicle is in motion, the hydraulic cylinder must be able to maneuver within a certain range when the cab and frame are in relative motion. During this maneuvering process, the cylinder's volume changes, causing hydraulic oil to move between the cylinder block and the pump body.

[0003] Due to factors such as oil throttling, friction between the piston and cylinder barrel, and friction between the oil seal and piston rod, hydraulic cylinders exert a damping force on the cab, causing structural vibration. Currently, hydraulic cylinders have poor vibration damping effects, making it difficult to eliminate this structural vibration. This results in high cab noise and a negative impact on the driving experience. Utility Model Content

[0004] The present application provides a hydraulic cylinder and a vehicle to solve related technical problems.

[0005] The present application provides a hydraulic cylinder for use in vehicles, comprising a cylinder body and a shock-absorbing assembly mounted to one end of the cylinder body; the end of the cylinder body facing away from the shock-absorbing assembly is used to connect to the vehicle frame; the shock-absorbing assembly is provided with a connecting hole for connecting to the vehicle cab; the shock-absorbing assembly includes a shock-absorbing member, which is arranged around the connecting hole; the shock-absorbing member is provided with a deformation recess.

[0006] By arranging the deformation recess on the vibration damping member, the rigidity of the vibration damping member is reduced, the vibration damping member is easily deformed, the shock absorbing ability of the vibration damping assembly is enhanced, and the vibration damping effect of the hydraulic cylinder is improved.

[0007] Furthermore, the axis direction of the deformable recess is parallel to the axis direction of the connecting hole and perpendicular to the main impact direction, making the vibration damping member more easily deformable and enhancing the vibration damping capability of the hydraulic cylinder.

[0008] Furthermore, the number of the deformation recesses is multiple and the multiple deformation recesses are evenly distributed along the circumference of the connecting hole. By providing multiple connecting holes, the deformation capacity of the vibration damping member is enhanced, and the vibration reduction effect of the hydraulic cylinder is improved.

[0009] Furthermore, the deformation recesses include a pair of first deformation recesses and a pair of second deformation recesses; the first deformation recesses are symmetrically arranged along the axis of the cylinder body, and the second deformation recesses are symmetrically arranged in a direction perpendicular to the axis of the cylinder body; and the first deformation recesses are larger than the second deformation recesses in the circumferential direction of the connecting hole. By increasing the size of the deformation recesses in the primary impact direction, the degree of deformation of the vibration damper after impact is increased, thereby improving the vibration reduction effect of the hydraulic cylinder.

[0010] Furthermore, the deformation recess is formed extending along the circumference of the connecting hole to further improve the deformation capacity of the vibration damping member and further improve the vibration damping effect of the hydraulic cylinder.

[0011] Furthermore, in the axial direction of the connecting hole, the projection of the deformed recess is symmetrical with respect to the axial direction of the cylinder body, so that the deformation of the vibration damping member is more uniform, thereby enhancing the vibration damping capability of the hydraulic cylinder.

[0012] Furthermore, the vibration damping assembly includes an outer sleeve and an inner sleeve mounted within the outer sleeve, the vibration damping member abuts the outer sleeve and the inner sleeve, and the connecting hole is provided in the inner sleeve. The provision of the inner sleeve and the outer sleeve improves the structural strength of the vibration damping assembly and ensures stability.

[0013] Furthermore, the vibration damping member covers the outer side surface of the inner sleeve to enhance the energy absorption effect of the vibration damping assembly and improve the vibration damping capability of the hydraulic cylinder.

[0014] Furthermore, one end of the cylinder body protrudes to form a lifting ear, and the lifting ear is provided with an assembly hole, and the vibration damping assembly is fixed to the assembly hole, which can improve the installation strength of the vibration damping assembly.

[0015] This application also provides a vehicle comprising a cab, a frame, and the aforementioned hydraulic cylinder. The cab is connected to the connection hole, and the frame is connected to the end of the cylinder body facing away from the vibration damping assembly. Due to the hydraulic cylinder's strong vibration damping capability and low noise levels within the cab, the driving experience of the vehicle is improved.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0018] Figure 1 is a structural diagram of a hydraulic cylinder in an exemplary embodiment of the present application;

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 yes Figure 1 Structural diagram of the vibration damping assembly;

[0021] Figure 4 yes Figure 3 The structural diagram of the middle vibration damping assembly from a side view;

[0022] Figure 5 yes Figure 4 Cross-sectional view of the middle vibration damping assembly at the BB;

[0023] Figure 6 is a schematic diagram of a vehicle in an exemplary embodiment of the present application.

[0024] Explanation of the accompanying drawings: cylinder body, 10; cab assembly end, 101; frame assembly end, 102; mounting hole, 103; lifting ear, 11; assembly hole, 12; shock absorber assembly, 20; connecting hole, 200; shock absorber, 21; main part, 211; side part, 212; deformation recess, 22; first deformation recess, 221; second deformation recess, 222; outer sleeve, 23; inner sleeve, 24; cab, 30; frame, 40. DETAILED DESCRIPTION

[0025] Here, the technical solutions in the embodiments (or "implementations") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0026] If there are terms related to directional indications or positional relationships in the embodiments of this application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of this application are only used for the purpose of convenience of description and should not be understood as indicating or implying relative importance.

[0027] Trucks are often equipped with hydraulic cylinders to tilt the cab, facilitating maintenance of the powertrain underneath. Currently, hydraulic cylinders have poor vibration damping capabilities and are unable to absorb the vehicle's structural vibrations, resulting in high noise levels inside the cab. This application provides a hydraulic cylinder and vehicle to address this issue.

[0028] like Figure 1 and Figure 2 As shown, the present application provides a hydraulic cylinder for use in a vehicle. The cylinder includes a cylinder body 10 and a vibration damping assembly 20 mounted to one end of the cylinder body 10. The end of the cylinder body 10 facing away from the vibration damping assembly 20 is used to connect to the vehicle frame. The vibration damping assembly 20 is provided with a connection hole 200 for connecting to the vehicle's cab. The vibration damping assembly 20 includes a vibration damping member 21 disposed around the connection hole 200. The vibration damping member 21 is provided with a deformation recess 22.

[0029] By providing the deformation recess 22 on the vibration damper 21, the stiffness of the vibration damper 21 is reduced, making it easier to deform. The vibration damping assembly 20 can absorb more impact, improve the vibration damping effect of the hydraulic cylinder, and thus reduce the noise inside the cab.

[0030] like Figure 1 As shown, the cylinder body 10 includes a cab assembly end 101 and a frame assembly end 102. The vibration damping assembly 20 is secured to the cab assembly end 101. The frame assembly end 102 is provided with mounting holes 103 and is connected to the vehicle frame. The connecting hole 200 connects to the cab. The cylinder body 10 is retractable to cause the cab to flip.

[0031] The cylinder body 10 is elongated, with its axis extending along the direction L1. In one embodiment, the cylinder body 10 may be provided with a lifting lug 11. The lifting lug 11 extends from one end of the cylinder body 10. The lifting lug 11 is provided with an assembly hole 12, into which the vibration damping assembly 20 is secured. The lifting lug 11 may be annular and secured to the cab assembly end 101. The provision of the lifting lug 11 to secure the vibration damping assembly 20 enhances its mounting strength and improves the stability of the hydraulic cylinder.

[0032] like Figure 2 and Figure 3 As shown, the vibration damper 21 can be cylindrical and made of an elastic material, specifically rubber. The axis of the connecting hole 200 is arranged along the direction L2. The directions L1 and L2 are perpendicular to each other to ensure that the cylinder body 10 can smoothly drive the cab to flip during extension and retraction.

[0033] In one embodiment, the axis direction of the deformed concave portion 22 is parallel to the axis of the connecting hole 200. The impact received by the vibration damping assembly 20 is mainly along the axis direction of the cylinder body 10, that is, Figure 2 The direction L1 shown in FIG is also along the radial direction of the connecting hole 200. When the deformable recess 22 is parallel to the connecting hole 200, the axial direction of the deformable recess 22 is perpendicular to the main impact direction, making it easier for the vibration damping member 21 to deform in the radial direction, thereby improving the shock absorption capability of the vibration damping assembly 20 and further enhancing the vibration reduction effect of the hydraulic cylinder.

[0034] In one embodiment, the deformable recess 22 extends along the circumference of the connecting hole 200. The deformable recess 22 is arc-shaped. By increasing the circumferential size of the deformable recess 22, the vibration damper 21's ability to absorb radial impact can be further improved, thereby enhancing the hydraulic cylinder's vibration damping capability. In other embodiments, the specific structural form of the deformable recess 22 is not limited and may also be a circular hole.

[0035] In one embodiment, the number of deformable recesses 22 can be multiple, evenly distributed along the circumference of the connecting hole 200. That is, the geometric centers of the connecting holes 200 are equally spaced circumferentially. Providing multiple deformable recesses 22 can further reduce the stiffness of the vibration damper 21, thereby improving the vibration damping effect of the hydraulic cylinder. In other embodiments, the specific number of deformable recesses 22 is not limited and can be just one.

[0036] In one embodiment, if Figure 2 and Figure 3 As shown in FIG. 2 , in the axial direction of the connecting hole 200 , the projection of the deformed recess 22 is symmetrical with respect to the axial direction of the cylinder body 10 . Figure 3 In the projection of the L2 direction shown in FIG, the deformed concave portion 22 is relative to Figure 2 Since the shock absorber 20 is mainly impacted along the axis of the cylinder body 10, arranging the deformation recesses 22 symmetrically relative to the axis of the cylinder body 10 can make the deformation of the shock absorber 21 after the impact more uniform, thereby improving the vibration reduction effect of the hydraulic cylinder.

[0037] Specifically, when there is only one deformable recess 22, the single deformable recess 22 is symmetrical with respect to L1. When there are multiple deformable recesses 22, the overall projection pattern formed by the projections of the multiple deformable recesses 22 in the direction of L2 is symmetrical with respect to L1. That is, among the multiple deformable recesses 22, if any deformable recess 22 passes through L1, then these deformable recesses 22 are symmetrical with respect to L1. If any deformable recess 22 does not pass through L1, then these deformable recesses 22 are distributed on both sides with L1 as the axis of symmetry.

[0038] like Figure 2 and Figure 4 As shown, in the embodiment where the number of the deformation recesses 22 is multiple, the deformation recesses 22 may include a pair of first deformation recesses 221 and a pair of second deformation recesses 222. In the axial direction of the cylinder body 10, the pair of first deformation recesses 221 are symmetrically arranged. In the direction perpendicular to the axis of the cylinder body 10, the pair of second deformation recesses 222 are symmetrically arranged. Specifically, the pair of first deformation recesses 221 are arranged along the axis of the cylinder body 10. Figure 2 The direction of L1 shown in FIG. 2 is set, and a pair of second deformation recesses 222 are arranged along Figure 4The direction setting of L3 is shown.

[0039] Around the connection hole 200, the first deforming recess 221 is larger than the second deforming recess 222. Because the shock absorber assembly 20 is primarily impacted along the axis of the cylinder body 10, the pair of first deforming recesses 221 are symmetrically positioned along the axis of the cylinder body 10, and the size of the first deforming recesses 221 is increased. This increases the degree of deformation of the shock absorber 21 after an impact, allowing the shock absorber 20 to absorb more impact energy and enhance the hydraulic cylinder's vibration damping effect. In other embodiments, the deforming recesses 22 may have the same shape and size to reduce the difficulty of manufacturing the shock absorber 21.

[0040] The deformed concave portion 22 may be a hole structure passing through the vibration damper 21, or a groove structure not passing through the vibration damper 21. In the embodiment where the deformed concave portion 22 is a groove structure, the axial direction of the deformed concave portion 22 refers to the concave direction of the groove structure.

[0041] In this embodiment, the deformation recess 22 can be provided on the side surface or the end surface of the vibration damper 21. Specifically, there can be multiple deformation recesses 22, with multiple deformation recesses 22 located on the side surface of the vibration damper 21 and distributed on both sides of the vibration damper 21 along the radial direction of the connecting hole 200. Alternatively, multiple deformation recesses 22 can be located on the end surface of the vibration damper 21 and distributed on both sides of the vibration damper 21 along the axial direction of the connecting hole 200.

[0042] like Figure 3 As shown, in one embodiment, the vibration damping assembly 20 may further include an outer sleeve 23 and an inner sleeve 24. The inner sleeve 24 is sleeved and installed in the outer sleeve 23. The vibration damping member 21 abuts against the outer sleeve 23 and the inner sleeve 24. The connecting hole 200 is provided in the inner sleeve 24.

[0043] The outer sleeve 23 and the inner sleeve 24 increase the overall strength of the vibration damping assembly 20 and improve the stability of the hydraulic cylinder. In addition, since the vibration damper 21 is abutted between the outer sleeve 23 and the inner sleeve 24, the vibration damper 21 does not need to directly contact external parts, which can reduce damage.

[0044] like Figure 2 and Figure 3 As shown, in an embodiment where the cylinder body 10 is provided with a lifting lug 11, the outer sidewall of the outer sleeve 23 can abut against the assembly hole 12 to secure the vibration damping assembly 20 to the cylinder body 10. During manufacturing, the vibration damping member 21, outer sleeve 23, and inner sleeve 24 can be assembled into one piece before the entire assembly is secured to the cab assembly end 101, resulting in highly efficient installation.

[0045] Specifically, in the embodiment where the vibration damping member 21 is made of rubber material, the vibration damping member 21, the outer sleeve 23 and the inner sleeve 24 are vulcanized and bonded together. The molding method of the vibration damping assembly 20 is not limited.

[0046] In other embodiments, the cylinder body 10 may not have the lug 11 at the cab assembly end 101, and the outer sleeve 23 may be directly fixedly connected to the cylinder body 10. In embodiments where the cylinder body 10 includes the lug 11, the vibration damping assembly 20 may not include the outer sleeve 23, and the outer wall of the vibration damper 21 may abut and be fixed against the inner wall of the assembly hole 12. The vibration damping assembly 20 may also not include the inner sleeve 24, and the connection hole 200 may be provided in the vibration damper 21, and the vibration damper 21 may be directly connected to the cab. The specific structure of the vibration damping assembly 20 is not limited.

[0047] In one embodiment, the vibration damping member 21 may cover the outer side of the inner sleeve 24, which can further improve the vibration damping capability of the vibration damping assembly 20. Figure 5 As shown, the vibration damper 21 includes a main portion 211 and side portions 212. The main portion 211 is mounted in the middle of the inner sleeve 24, while the side portions 212 extend from the main portion 211 to both ends of the inner sleeve 24 to cover the outer side of the inner sleeve 24. In other embodiments, the specific structure of the vibration damper 21 is not limited.

[0048] like Figure 6 As shown, the present application also provides a vehicle comprising a cab 30, a frame 40, and the aforementioned hydraulic cylinder. The cab 30 is connected to the connection hole 200. The frame 40 is connected to the end of the cylinder body 10 facing away from the vibration damping assembly 20. Due to the hydraulic cylinder's excellent vibration damping effect, the vehicle of the present application is quieter, improving the driving experience. Furthermore, the cab 30's stability during a rollover is enhanced.

[0049] Specifically, combined Figure 1 and Figure 6 As shown, the cab 30 may be provided with a corresponding support structure (not shown), and the cab assembly end 101 may be connected to the support structure of the cab 30 via the connection hole 200. The frame assembly end 102 may be connected to the frame 40 via the mounting hole 103. The frame 40 may be a chassis. The vehicle of the present application may be an electric medium-duty truck, an electric heavy-duty truck, a fuel medium-duty truck, a fuel heavy-duty truck, etc., without limitation to the specific type.

[0050] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A hydraulic cylinder, used in a vehicle, characterized in that: include: A cylinder body and a vibration damping assembly mounted to one end of the cylinder body; an end of the cylinder body facing away from the vibration damping assembly is used to connect to a vehicle frame; The vibration damping assembly is provided with a connection hole for connecting to a cab of a vehicle; the vibration damping assembly comprises a vibration damping member, which is arranged around the connection hole; and the vibration damping member is provided with a deformation recess.

2. The hydraulic cylinder according to claim 1, characterized in that The axial direction of the deformed recess is parallel to the axial direction of the connecting hole.

3. The hydraulic cylinder according to claim 2, characterized in that There are multiple deformation recesses, and the multiple deformation recesses are evenly distributed along the circumference of the connecting hole.

4. The hydraulic cylinder according to claim 3, characterized in that The deformation recesses include a pair of first deformation recesses and a pair of second deformation recesses; A pair of the first deformation recesses are symmetrically arranged in the axial direction of the cylinder body; a pair of the second deformation recesses are symmetrically arranged in the direction perpendicular to the axis of the cylinder body; In the circumferential direction of the connecting hole, the size of the first deformation recess is larger than that of the second deformation recess.

5. The hydraulic cylinder according to claim 2, characterized in that: The deformed recess is formed and extended along the circumference of the connecting hole.

6. The hydraulic cylinder according to claim 2, characterized in that: In the axial direction of the connecting hole, the projection of the deformed recess is symmetrical with respect to the axial direction of the cylinder body.

7. The hydraulic cylinder according to claim 1, characterized in that The vibration damping assembly further includes an outer sleeve and an inner sleeve installed in the outer sleeve, the vibration damping member abuts against the outer sleeve and the inner sleeve; the connecting hole is provided in the inner sleeve.

8. The hydraulic cylinder according to claim 7, characterized in that: The vibration damper covers the outer side surface of the inner sleeve.

9. The hydraulic cylinder according to claim 1, wherein: One end of the cylinder body protrudes to form a lifting ear, and the lifting ear is provided with an assembly hole, and the vibration reduction assembly is fixed to the assembly hole.

10. A vehicle, characterized in that: include: A cab, a frame, and a hydraulic cylinder according to any one of claims 1 to 9; The cab is connected to the connecting hole, and the vehicle frame is connected to an end of the cylinder body facing away from the shock absorbing assembly.

Images