Low friction shock absorber

Abstract

The application provides a low-friction shock absorber, which comprises a shock absorber cylinder, a shock absorber rod body slidingly arranged on the upper end of the shock absorber cylinder, and a shock absorber piston fixedly arranged on the lower end of the shock absorber rod body; the upper end of the shock absorber cylinder is provided with a lubricating seat; a connecting hole is formed through the center of the lubricating seat; the shock absorber rod body is slidingly arranged on the inner side of the connecting hole; a ring-shaped lubricating groove is formed on the inner side of the connecting hole; a lubricating channel is formed on the upper end of the lubricating seat; a lubricating grease injection device is detachably arranged on the upper end of the lubricating seat; and the grease outlet of the lubricating grease injection device is in communication with the upper end opening of the lubricating channel. During use, the lubricating grease injection device is used to inject lubricating grease into the lubricating channel, and then the lubricating grease in the lubricating channel can enter the ring-shaped lubricating groove under the action of pressure. When the shock absorber rod body slides on the inner side of the connecting hole, the lubricating grease in the ring-shaped lubricating groove can be coated on the outer wall of the shock absorber rod body, so as to reduce the friction between the shock absorber rod body and the shock absorber cylinder, and the shock absorber has the advantage of faster response speed.

Description

TECHNICAL FIELD

[0001] The present application relates to a shock absorber, in particular, to a low-friction shock absorber. BACKGROUND

[0002] At present, a motorcycle rear shock absorber is disclosed in Chinese Patent No. CN114183492A, which comprises a shock absorber cylinder, an outer spring and an upper joint. A piston rod is installed in the shock absorber cylinder. A lower valve seat, an upper valve seat and a buffer spring are installed on the outer side of the lower part of the piston rod from bottom to top. A piston is sleeved on the outer side of the lower valve seat and the upper valve seat. The piston is sleeved on the inner side of the shock absorber cylinder. A composite bushing is installed on the outer side of the piston. A valve piece group and an abutting flat pad are installed on the top and bottom of the piston. A first flat pad, an oil seal ring and a second flat pad are installed in the inner hole of the top of the shock absorber cylinder from bottom to top. The bottom end of the buffer spring abuts against the top of the upper valve seat. The top end of the buffer spring abuts against the bottom of the first flat pad. The piston rod is installed in the inner side of the first flat pad, the oil seal ring and the second flat pad. The upper joint is screwed on the top of the piston rod. The outer spring is installed on the outer diameter of the shock absorber cylinder. An adjuster is installed on the outer diameter of the lower part of the shock absorber cylinder. The top end of the outer spring abuts against the bottom of the upper joint. The bottom end of the outer spring abuts against the top of the adjuster. However, the friction between the piston rod and the shock absorber cylinder will affect the response speed of the motorcycle rear shock absorber during use. SUMMARY

[0003] Therefore, the present application aims to provide a low-friction shock absorber with the advantage of faster response speed.

[0004] In order to solve the above technical problems, the technical scheme of the present application is as follows: a low-friction shock absorber, comprising a shock absorber cylinder, a shock absorber rod body slidingly arranged on the upper end of the shock absorber cylinder, and a shock absorber piston fixedly arranged on the lower end of the shock absorber rod body. The shock absorber piston is slidingly arranged on the inner side of the shock absorber cylinder. The upper end of the shock absorber cylinder is provided with a lubricating seat. A connecting hole is formed in the center of the lubricating seat. The shock absorber rod body is slidingly arranged on the inner side of the connecting hole. An annular lubricating groove is formed in the inner side of the connecting hole. A lubricating channel is formed in the upper end of the lubricating seat and communicates with the annular lubricating groove. A lubricating grease injection device is detachably arranged on the upper end of the lubricating seat. The grease outlet hole of the lubricating grease injection device communicates with the upper end opening of the lubricating channel, so as to inject lubricating grease into the lubricating channel.

[0005] By the technical scheme, the lubricating grease can be injected into the lubricating channel through the lubricating grease injection device, and then the lubricating grease in the lubricating channel can enter the annular lubricating groove under the pressure. When the shock rod body slides on the inner side of the connecting hole, the lubricating grease in the annular lubricating groove can be coated on the outer wall of the shock rod body, so as to reduce the friction between the shock rod body and the shock cylinder body, and the shock absorber has the advantage of faster response speed. The lubricating grease injection device is detachably connected with the lubricating seat, so that when the lubricating grease in the lubricating grease injection device is exhausted, the shock rod body can be continuously lubricated by only detaching and replacing the lubricating grease injection device.

[0006] Preferably, the lubricating grease injection device comprises a lubricating grease injection cylinder, a lubricating grease injection piston slidingly arranged on the inner side of the lubricating grease injection cylinder, and a driving mechanism for driving the lubricating grease injection piston to slide downward, and the lower end of the lubricating grease injection cylinder is provided with a connecting pipe which is threadedly connected to the upper end opening of the lubricating channel.

[0007] By the technical scheme, the lubricating grease injection piston can be driven to move downward by the driving mechanism, and the lubricating grease on the inner side of the lubricating grease injection cylinder is pressed into the lubricating channel from the connecting pipe during the downward movement of the lubricating grease injection piston.

[0008] Preferably, the driving mechanism comprises a driving outer sleeve and a driving inner rod arranged on the inner side of the driving outer sleeve, the driving outer sleeve is threadedly connected to the outer side of the upper end of the lubricating grease injection cylinder, and the lower end of the driving inner rod abuts against the upper end of the lubricating grease injection piston.

[0009] By the technical scheme, since the driving outer sleeve is threadedly connected to the upper end of the lubricating grease injection cylinder, the driving inner rod can only press the lubricating grease injection piston downward by driving the driving outer sleeve to rotate circumferentially.

[0010] Preferably, the lower end of the driving outer sleeve is flush with the lower end of the driving inner rod.

[0011] By the technical scheme, the lower end of the driving outer sleeve is flush with the lower end of the driving inner rod, so that whether there is sufficient lubricating grease on the inner side of the lubricating grease injection cylinder can be directly observed by only observing the position of the lower end of the driving outer sleeve.

[0012] Preferably, the threads on the outer side of the lubricating grease injection cylinder are right-handed threads, a plurality of driving grooves are formed on the outer side of the upper end of the driving outer sleeve and are uniformly distributed along the circumference of the driving outer sleeve, a driving sleeve ring is arranged on the outer side of the upper end of the driving outer sleeve, a mounting groove is formed on the inner side of the driving sleeve ring, an outward pushing spring and a driving protrusion are sequentially arranged in the mounting groove, the outward pushing spring drives the driving protrusion to slide outwardly of the mounting groove by elastic force, a guide inclined surface is formed on the end of the driving protrusion which protrudes out of the mounting groove, and when the driving sleeve ring is counterclockwise rotated, the slot of the driving groove extrudes the guide inclined surface and drives the driving protrusion to slide inwardly of the mounting groove.

[0013] Through the technical scheme, when grease needs to be injected into the lubricating channel, the drive sleeve ring is first rotated clockwise, at this time the drive protrusion extends into the drive recess, the outer wall of the drive protrusion abuts tightly against the inner wall of the drive recess, the drive sleeve ring drives the drive outer sleeve to rotate clockwise through the drive protrusion, so that the screwing length between the drive outer sleeve and the grease injection cylinder increases, and thus the drive outer sleeve can press down the grease injection piston through the drive inner rod, after the drive sleeve ring is rotated clockwise by a certain angle, the drive sleeve ring is rotated counterclockwise, at this time the notch of the drive recess extrudes the guide inclined surface and drives the drive protrusion to slide to the inner side of the mounting groove, so that the position of the drive outer sleeve remains fixed, and then only the clockwise and counterclockwise rotation of the drive sleeve ring needs to be controlled. Through the addition of the one-way mechanism between the drive sleeve ring and the drive outer sleeve, only a small angle of the drive sleeve ring needs to be controlled each time, so that the use of the above-mentioned drive mechanism becomes more convenient.

[0014] Preferably, the drive mechanism further comprises a drive cable and a reset member, the drive cable is connected with the drive sleeve ring and is used to drive the drive sleeve ring to rotate clockwise, and the reset member is arranged between the damping cylinder body and the drive sleeve ring and is used to drive the drive sleeve ring to rotate counterclockwise.

[0015] Through the technical scheme, when in use, the end of the drive cable away from the drive sleeve ring is connected with an additional handle on the motorcycle frame, so that the user only needs to control the clockwise rotation of the drive sleeve ring by pressing the handle, and when the user releases the handle, the reset member can control the counterclockwise rotation of the drive sleeve ring to complete the reset. When a large amount of grease needs to be injected into the lubricating channel, the user only needs to press the handle several times in a short time.

[0016] Preferably, the reset member comprises a mounting bracket and an elastic rib, the mounting bracket is arranged at the upper end of the damping cylinder body, and the two ends of the elastic rib are connected with the mounting bracket and the drive sleeve ring respectively.

[0017] Through the technical scheme, when the drive sleeve ring rotates clockwise under the action of the drive cable, the elastic rib is elongated and accumulates elastic force. When the user releases the handle, the elastic rib will drive the drive sleeve ring to rotate counterclockwise through the elastic force to complete the reset. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of an embodiment;

[0019] Figure 2 It is an enlarged view of A part of Figure 1

[0020] ​1, damping cylinder; 2, damping rod body; 3, damping piston; 4, lubricating seat; 5, connecting hole; 6, annular lubricating groove; 7, lubricating channel; 8, grease injection device; 81, grease injection cylinder; 82, grease injection piston; 83, driving mechanism; 831, driving outer sleeve; 832, driving inner rod; 833, driving cable; 834, reset member; 8341, mounting bracket; 8342, elastic rib; 9, connecting pipe; 10, driving groove; 11, driving sleeve ring; 12, mounting groove; 13, outer push spring; 14, driving protrusion; 15, guide slope. Embodiment

[0021] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings, so that the technical scheme of the present application is easier to understand and master.

[0022] A low-friction shock absorber, as shown in Figure 1 , Figure 2 , comprises a damping cylinder 1, a damping rod body 2 slidingly arranged at the upper end of the damping cylinder 1, and a damping piston 3 fixedly arranged at the lower end of the damping rod body 2, the damping piston 3 being slidingly arranged inside the damping cylinder 1. In use, the damping rod body 2 can drive the damping piston 3 to slide up and down in the damping cylinder 1 in the axial direction.

[0023] The upper end of the damping cylinder 1 is provided with a lubricating seat 4, a connecting hole 5 is formed through the center of the lubricating seat 4, and the damping rod body 2 is slidingly arranged inside the connecting hole 5. An annular lubricating groove 6 is formed in the inner side of the connecting hole 5 in the circumferential direction, and a lubricating channel 7 is formed in the upper end of the lubricating seat 4 and communicates with the annular lubricating groove 6. A grease injection device 8 is detachably arranged at the upper end of the lubricating seat 4, and the grease outlet of the grease injection device 8 communicates with the upper end opening of the lubricating channel 7. In use, the lubricating grease is injected into the annular lubricating groove 6 through the grease injection device 8, so as to reduce the friction between the damping rod body 2 and the damping cylinder 1, and make the above-mentioned shock absorber have a faster response speed.

[0024] The grease injection device 8 comprises a grease injection cylinder 81, a grease injection piston 82 slidingly arranged inside the grease injection cylinder 81, and a driving mechanism 83 for driving the grease injection piston 82 to slide downward. The lower end of the grease injection cylinder 81 is provided with a connecting pipe 9, which is threadedly connected to the upper end opening of the lubricating channel 7. The driving mechanism 83 comprises a driving outer sleeve 831 and a driving inner rod 832 arranged inside the driving outer sleeve 831. The driving outer sleeve 831 is threadedly connected to the upper end outside of the grease injection cylinder 81, the lower end of the driving inner rod 832 abuts against the upper end of the grease injection piston 82, and the lower end of the driving outer sleeve 831 is flush with the lower end of the driving inner rod 832.

[0025] The thread outside the grease injection cylinder 81 is right-handed thread, a plurality of drive grooves 10 are arranged on the upper end outside of the drive sleeve 831, and the drive grooves 10 are evenly distributed along the circumference of the drive sleeve 831, a drive collar 11 is sleeved on the upper end outside of the drive sleeve 831, a mounting groove 12 is arranged on the inside of the drive collar 11, an outer push spring 13 and a drive protrusion 14 are sequentially arranged in the mounting groove 12, the outer push spring 13 drives the drive protrusion 14 to slide to the outside of the mounting groove 12 through elastic force, the end of the drive protrusion 14 protruding from the mounting groove 12 is provided with a guide inclined surface 15, when the drive collar 11 rotates counterclockwise, the slot of the drive groove 10 extrudes the guide inclined surface 15 and drives the drive protrusion 14 to slide to the inside of the mounting groove 12.

[0026] The drive mechanism 83 further comprises a drive cable 833 and a reset member 834. The drive cable 833 is connected with the drive collar 11, so as to drive the drive collar 11 to rotate clockwise. The reset member 834 is arranged between the damping cylinder body 1 and the drive collar 11, so as to drive the drive collar 11 to rotate counterclockwise. The reset member 834 comprises a mounting bracket 8341 and an elastic rib 8342, the mounting bracket 8341 is arranged on the upper end of the damping cylinder body 1, and the two ends of the elastic rib 8342 are connected with the mounting bracket 8341 and the drive collar 11 respectively.

[0027] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific embodiments, any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A low-friction shock absorber comprising a shock absorber cylinder (1), a shock absorber rod (2) slidingly arranged on the upper end of the shock absorber cylinder (1), a shock absorber piston (3) fixedly arranged on the lower end of the shock absorber rod (2), the shock absorber piston (3) slidingly arranged on the inner side of the shock absorber cylinder (1), characterized in that: The upper end of the damping cylinder (1) is provided with a lubricating seat (4), a connecting hole (5) is arranged at the center of the lubricating seat (4), the damping rod (2) is arranged on the inner side of the connecting hole (5), the inner side of the connecting hole (5) is provided with an annular lubricating groove (6), the upper end of the lubricating seat (4) is provided with a lubricating channel (7) communicating with the annular lubricating groove (6), and the upper end of the lubricating seat (4) is detachably provided with a lubricating device (8), the grease outlet hole of the lubricating device (8) is in communication with the upper end opening of the lubricating channel (7), and the lubricating channel (7) is used for injecting lubricating grease into the lubricating channel (7); The lubricating device (8) comprises a lubricating cylinder (81), a lubricating piston (82) arranged on the inner side of the lubricating cylinder (81), and a driving mechanism (83) used for driving the lubricating piston (82) to slide downward. The driving mechanism (83) comprises a driving outer sleeve (831) and a driving inner rod (832) arranged on the inner side of the driving outer sleeve (831), the driving outer sleeve (831) is threadedly connected to the outer side of the upper end of the lubricating cylinder (81), and the lower end of the driving inner rod (832) abuts against the upper end of the lubricating piston (82). The threads on the outer side of the lubricating cylinder (81) are right-handed threads, a plurality of driving grooves (10) are arranged on the outer side of the upper end of the driving outer sleeve (831), the driving grooves (10) are uniformly distributed along the circumference of the driving outer sleeve (831), a driving sleeve ring (11) is arranged on the outer side of the upper end of the driving outer sleeve (831), an installation groove (12) is arranged on the inner side of the driving sleeve ring (11), an outward pushing spring (13) and a driving protruding block (14) are sequentially arranged in the installation groove (12), the outward pushing spring (13) drives the driving protruding block (14) to slide outwardly of the installation groove (12) through elastic force, a guide inclined surface (15) is arranged on the end portion of the driving protruding block (14) protruding from the installation groove (12), when the driving sleeve ring (11) rotates counterclockwise, the groove opening of the driving groove (10) extrudes the guide inclined surface (15) and drives the driving protruding block (14) to slide inwardly of the installation groove (12). The driving mechanism (83) further comprises a driving cable (833) and a reset member (834), the driving cable (833) is connected with the driving sleeve ring (11) and is used for driving the driving sleeve ring (11) to rotate clockwise. The end portion of the driving cable (833) away from the driving sleeve ring (11) is connected with an additional handle on the motorcycle frame.

2. A low-friction shock absorber according to claim 1, characterized in that: The lower end of the lubricating cylinder (81) is provided with a connecting pipe (9), and the connecting pipe (9) is threadedly connected to the upper end opening of the lubricating channel (7).

3. A low friction shock absorber according to claim 1 wherein: The lower end of the driving outer sleeve (831) is flush with the lower end of the driving inner rod (832).

4. A low-friction shock absorber according to claim 1, characterized in that: The reset member (834) is arranged between the damping cylinder (1) and the driving sleeve ring (11) and is used for driving the driving sleeve ring (11) to rotate counterclockwise.

5. A low friction shock absorber according to claim 4, characterized in that: The reset member (834) comprises a mounting bracket (8341) and an elastic rib (8342), the mounting bracket (8341) is arranged at the upper end of the damping cylinder (1), and two ends of the elastic rib (8342) are connected with the mounting bracket (8341) and the driving sleeve ring (11) respectively.

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