Inverted front shock absorber compression side damping lifting mechanism

Abstract

The invention discloses a compression side damping lifting mechanism of an inverted front shock absorber. The compression side damping lifting mechanism comprises a compression side fixed rod, a stretching side movable rod, a connecting base, a compression side damping lifting assembly and a movable side damping lifting assembly. The damping device has the beneficial effects that in the process that the stretching side movable rod is compressed downwards for damping, hydraulic oil in the supporting inner pipe can flow out of the pipe through the valve plate assembly arranged between the compression side valve seat and the compression side damping piston, hydraulic damping on the compression side is generated, and then most of vibration and impact force can be absorbed; a softer and more comfortable riding feeling is brought to a rider; when the stretching side movable rod moves upwards to restore to the original shape after being compressed downwards for damping, hydraulic oil outside the supporting inner pipe flows into the pipe through a valve plate assembly arranged between the movable side valve seat and the movable side damping piston, hydraulic damping on the movable side can be generated, the stretching side movable rod is prevented from restoring to the original shape rapidly, and the service life of the stretching side movable rod is prolonged. And the effect of absorbing most impact force can also be achieved.

Description

Technical Field

[0001] The invention relates to a shock absorber damping lifting mechanism, in particular to an inverted front shock absorber compression side damping lifting mechanism, belonging to the technical field of shock absorbers. Background Art

[0002] A shock absorber is a device used to suppress the vibration caused by the rebound of a spring after absorbing shock and the impact from the road surface. By installing shock absorbers on a vehicle, the attenuation of the vibration of the frame and body can be accelerated to improve the vehicle's driving smoothness and comfort. Hydraulic shock absorbers are the most commonly used shock absorbers on motorcycles. They produce better damping effect through hydraulics and achieve the purpose of shock reduction.

[0003] In the prior art, there is an inverted hydraulic damping shock absorber disclosed in announcement number CN209083886U, which includes an outer sleeve, an inner sleeve inserted in the outer sleeve, an oil seal arranged between the outer sleeve and the inner sleeve, a piston tube inserted in the inner sleeve is arranged in the outer sleeve, a damping head abutting against the outer wall of the piston tube and the inner wall of the outer sleeve is arranged at one end of the inner sleeve, a sealing assembly located in the inner sleeve is arranged at one end of the piston tube, the sealing assembly divides the interior of the inner sleeve into a damping chamber and a telescopic chamber which are not connected to each other, and a plurality of guide holes connected to the interior of the outer sleeve and a plurality of damping holes connected to the damping chamber are arranged on the piston tube; through the triple sealing of the damping head, the sealing assembly and the oil seal, the leakage of the hydraulic oil is limited, thereby ensuring the pressure difference environment inside the shock absorber, ensuring The shock absorbing effect of the shock absorber reduces the amplitude and energy of the wheel vibration transmitted to the vehicle body, and improves the driving stability and comfort. However, although the existing shock absorber can play the role of hydraulic damping shock absorption, it adopts the change of the damping chamber volume to form a local vacuum to generate compression resistance. This method can only play a certain role in shock absorption, but it cannot use damping to replace a part of the spring rigidity value for support, and it is impossible to reduce the rigidity value of the shock absorber spring to make it softer, that is, the rigidity value of the large spring needs to be made relatively high, that is, the spring is relatively hard in layman's terms. In this case, the rider will feel very uncomfortable, and in actual use, the compression degree of the spring cannot be adjusted accordingly according to the usage situation, and thus cannot better meet different usage requirements. Summary of the invention

[0004] The purpose of the present invention is to provide an inverted front shock absorber compression side damping lifting mechanism in order to solve at least one of the above technical problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions: an inverted front shock absorber compression side damping lifting mechanism, comprising a compression side fixed rod, a tension side movable rod and a connecting base, the tension side movable rod is movably connected to the upper end rod body of the compression side fixed rod, the connecting base is fixedly connected to the bottom end of the compression side fixed rod, a compression side damping lifting assembly is fixedly connected in the cavity opened by the compression side fixed rod, a shock-absorbing inner rod is fixedly connected in the tension side movable rod, the bottom end of the shock-absorbing inner rod is connected to the movable side damping lifting assembly, the cavity opened by the compression side fixed rod is filled with hydraulic oil, and a supporting inner tube is connected between the compression side damping lifting assembly and the movable side damping lifting assembly; The compression side damping lifting assembly includes a compression side hydraulic damping base, a compression side damping piston, a compression side valve seat and a compression side self-locking nut. The compression side hydraulic damping base is fixedly connected to the bottom end of the cavity opened by the compression side fixed rod by bolts. The compression side valve seat and the compression side damping piston are sequentially sleeved on the compression side hydraulic damping base from top to bottom. The compression side self-locking nut is threadedly locked and fixed to the upper end of the compression side hydraulic damping base. A valve plate assembly is arranged between the compression side valve seat and the compression side damping piston. The movable side damping lifting assembly includes a movable side valve seat, a movable side damping piston and a movable side self-locking nut. The movable side valve seat and the movable side damping piston are sequentially mounted on the bottom rod body of the shock-absorbing inner rod from top to bottom. The movable side self-locking nut is threadedly locked and fixed on the bottom end of the shock-absorbing inner rod. A valve plate assembly is arranged between the movable side valve seat and the movable side damping piston.

[0006] As a further solution of the present invention: the valve plate assembly includes a butterfly spring, a main valve plate, a large valve plate and a small valve plate. The butterfly spring, the main valve plate, the large valve plate and the small valve plate are stacked in sequence from top to bottom. A plurality of valve holes are opened on the main valve plate. The large valve plate and the small valve plate are arranged in a stepped shape, and the body of the large valve plate is tightly attached to the bottom of the valve hole.

[0007] As a further solution of the present invention: the compression side damping piston is provided with a compression side liquid guide channel, the lower end tube body of the supporting inner tube is provided with a hydraulic oil outlet hole, and the hydraulic oil outlet hole is connected with the compression side liquid guide channel.

[0008] As a further solution of the present invention: the movable side damping piston is provided with a movable side liquid guide channel, the upper end tube body of the supporting inner tube is provided with a hydraulic oil introduction hole, and the hydraulic oil introduction hole is connected with the movable side liquid guide channel.

[0009] As a further solution of the present invention: the upper end of the stretching side movable rod is fixedly connected to the top fixing seat, the upper end of the shock-absorbing inner rod is fixedly connected to the top fixing seat, the movable sleeve on the rod body of the shock-absorbing inner rod is provided with a shock-absorbing compression spring and a movable clamping seat, and the movable clamping seat is clamped between the shock-absorbing compression spring and the supporting inner tube.

[0010] As a further solution of the present invention: an upper limit seat and a lower limit seat are fixedly connected to the rod body of the shock-absorbing inner rod, and a limit sleeve is sleeved on the rod body of the shock-absorbing inner rod, and two ends of the limit sleeve are respectively abutted between the upper limit seat and the lower limit seat, and the upper end of the shock-absorbing compression spring is abutted under the lower limit seat.

[0011] As a further solution of the present invention: a positioning block and an anti-loosening spring are also sleeved on the rod body of the shock-absorbing inner rod, the positioning block is fixed to the upper end of the supporting inner tube through a concave-convex groove, and the anti-loosening spring is abutted between the positioning block and the movable side valve seat.

[0012] As a further solution of the present invention: the open bottom end of the tension side movable rod is connected with a movable side end clamping ring, an outer sealing ring is arranged between the tension side movable rod and the compression side fixed rod, and the movable side end clamping ring is tightly attached to the rod wall of the compression side fixed rod.

[0013] The beneficial effects of the present invention are as follows: the present invention is provided with a compression side damping lifting assembly, which includes a compression side hydraulic damping base, a compression side damping piston, a compression side valve seat and a compression side self-locking nut, and a valve plate assembly is arranged between the compression side valve seat and the compression side damping piston, so that during the process of downward compression of the stretch side movable rod for shock absorption, the hydraulic oil in the supporting inner tube can flow to the outside of the tube through the valve plate assembly arranged between the compression side valve seat and the compression side damping piston, thereby generating hydraulic damping on the compression side, and then absorbing most of the vibration and impact force, thereby providing the rider with a softer and more comfortable riding feeling; The present invention is provided with a movable side damping lifting component, which includes a movable side valve seat, a movable side damping piston and a movable side self-locking nut. A valve plate assembly is arranged between the movable side valve seat and the movable side damping piston. When the movable rod on the stretching side moves upward to restore its original state after being compressed and shock-absorbed downward, the hydraulic oil outside the supporting inner tube can flow into the tube through the valve plate assembly arranged between the movable side valve seat and the movable side damping piston, thereby generating hydraulic damping on the movable side to prevent the movable rod on the stretching side from quickly returning to its original state, and also absorbing most of the impact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the bottom end of the compression side fixing rod of the present invention; Figure 4 It is a schematic diagram of the structure of the compression side damping lifting assembly of the present invention; Figure 5 It is a schematic diagram of the structure of the compression side damping lifting assembly of the present invention in a disassembled state; Figure 6 It is a schematic diagram of the cross-sectional structure of the compression side damping piston of the present invention; Figure 7 This is a schematic diagram of the structure of the main valve plate of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the upper end of the stretching side movable rod of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the lower end of the stretching side movable rod of the present invention.

[0015] In the figure: 1, compression side fixed rod, 11, support inner tube, 12, compression side hydraulic damping base, 13, compression side damping piston, 131, compression side liquid guide channel, 14, compression side valve seat, 15, compression side self-locking nut, 16, hydraulic oil outlet hole, 2, tension side movable rod, 21, top fixed seat, 22, shock-absorbing inner rod, 23, shock-absorbing compression spring, 24, upper limit seat, 25, limit sleeve, 26, lower limit Card seat, 27, movable card seat, 28, positioning block, 29, anti-loosening spring, 210, movable side valve seat, 211, movable side damping piston, 2111, movable side liquid guide channel, 212, movable side self-locking nut, 213, outer sealing ring, 214, movable side end clamping ring, 215, hydraulic oil inlet hole, 3, connecting base, 4, butterfly spring, 5, main valve plate, 51, valve hole, 6, large valve plate, 7, small valve plate. DETAILED DESCRIPTION

[0016] 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. Embodiment 1

[0017] like Figures 1 to 9 As shown, an inverted front shock absorber compression side damping lifting mechanism comprises a compression side fixed rod 1, a tension side movable rod 2 and a connecting base 3, the tension side movable rod 2 is movably connected to the upper end rod body of the compression side fixed rod 1, the connecting base 3 is fixedly connected to the bottom end of the compression side fixed rod 1, a compression side damping lifting assembly is fixedly connected in the cavity opened by the compression side fixed rod 1, a shock absorbing inner rod 22 is fixedly connected in the tension side movable rod 2, a movable side damping lifting assembly is connected to the bottom end of the shock absorbing inner rod 22, the cavity opened by the compression side fixed rod 1 is filled with hydraulic oil, and a supporting inner tube 11 is connected between the compression side damping lifting assembly and the movable side damping lifting assembly; The compression side damping lifting assembly includes a compression side hydraulic damping base 12, a compression side damping piston 13, a compression side valve seat 14 and a compression side self-locking nut 15. The compression side hydraulic damping base 12 is fixedly connected to the bottom end of the cavity opened by the compression side fixed rod 1 by bolts. The compression side valve seat 14 and the compression side damping piston 13 are sequentially sleeved on the compression side hydraulic damping base 12 from top to bottom. The compression side self-locking nut 15 is threadedly locked and fixed to the upper end of the compression side hydraulic damping base 12. A valve plate assembly is arranged between the compression side valve seat 14 and the compression side damping piston 13. When the tension side movable rod 2 is compressed downward for shock absorption, the hydraulic oil in the supporting inner tube 11 can flow to the outside of the tube through the valve plate assembly arranged between the compression side valve seat 14 and the compression side damping piston 13, thereby generating hydraulic damping on the compression side, which can then absorb most of the vibration and impact force, giving the rider a softer and more comfortable riding feeling. The movable side damping lifting assembly includes a movable side valve seat 210, a movable side damping piston 211 and a movable side self-locking nut 212. The movable side valve seat 210 and the movable side damping piston 211 are sequentially sleeved on the bottom rod body of the shock-absorbing inner rod 22 from top to bottom. The movable side self-locking nut 212 is threadedly locked and fixed on the bottom end of the shock-absorbing inner rod 22. A valve plate assembly is arranged between the movable side valve seat 210 and the movable side damping piston 211. When the tensile side movable rod 2 moves upward to restore its original state after downward compression and shock absorption, the hydraulic oil outside the supporting inner tube 11 can flow into the tube through the valve plate assembly arranged between the movable side valve seat 210 and the movable side damping piston 211, which can generate hydraulic damping on the movable side to prevent the tensile side movable rod 2 from quickly returning to its original state, and can also absorb most of the impact force. Embodiment 2

[0018] In addition to all the technical features of the first embodiment, this embodiment also includes: The valve plate assembly includes a butterfly spring 4, a main valve plate 5, a large valve plate 6 and a small valve plate 7. The butterfly spring 4, the main valve plate 5, the large valve plate 6 and the small valve plate 7 are stacked in sequence from top to bottom. A plurality of valve holes 51 are opened on the main valve plate 5. The large valve plate 6 and the small valve plate 7 are arranged in a stepped manner. The body of the large valve plate 6 is tightly attached to the bottom of the valve hole 51, so that the main valve plate 5, the large valve plate 6 and the small valve plate 7 can be tightly attached together through the butterfly spring 4, so that the valve plate assembly can be firmly installed in the corresponding damping lifting assembly. Since the large valve plate 6 can form a blockage under the valve hole 51, and the small valve plate 7 can form a support for the large valve plate 6, the valve plate assembly can constitute a structure similar to a one-way valve, so that the hydraulic oil can only flow along a preset path.

[0019] The compression side damping piston 13 is provided with a compression side liquid guide channel 131, and the lower end tube body of the support inner tube 11 is provided with a hydraulic oil outlet hole 16, and the hydraulic oil outlet hole 16 is connected with the compression side liquid guide channel 131, so that when the hydraulic oil in the support inner tube 11 flows to the outside of the tube through the valve plate assembly, it can be discharged through the channel formed by the compression side liquid guide channel 131 and the hydraulic oil outlet hole 16, thereby generating hydraulic damping on the compression side.

[0020] The movable side damping piston 211 is provided with a movable side liquid guiding channel 2111, and the upper end tube body of the supporting inner tube 11 is provided with a hydraulic oil inlet hole 215, and the hydraulic oil inlet hole 215 is communicated with the movable side liquid guiding channel 2111, so that when the hydraulic oil outside the supporting inner tube 11 flows into the tube through the valve plate assembly, it can be introduced through the channel formed by the movable side liquid guiding channel 2111 and the hydraulic oil inlet hole 215, thereby generating hydraulic damping on the movable side. Embodiment 3

[0021] In addition to all the technical features of the first embodiment, this embodiment also includes: The upper end of the stretching-side movable rod 2 is fixedly connected with a top fixing seat 21, and the upper end of the shock-absorbing inner rod 22 is fixedly connected to the top fixing seat 21. A shock-absorbing compression spring 23 and a movable clamping seat 27 are movably sleeved on the rod body of the shock-absorbing inner rod 22. The movable clamping seat 27 is clamped between the shock-absorbing compression spring 23 and the supporting inner tube 11, and the stretching-side movable rod 2 and the shock-absorbing inner rod 22 can be firmly combined together through the top fixing seat 21, and the shock-absorbing compression spring 23 can be compressed during the downward movement of the stretching-side movable rod 2, so that it can have a certain shock-absorbing effect, and cooperate with the compression-side damping lifting component to play a joint shock-absorbing role, without relying entirely on the rigid force value of the spring for shock-absorbing support. Through the coordinated shock-absorbing of the compression-side damping lifting component, the rigid force value of the spring can be reduced and made softer, and the compression-side damping lifting component can be used to replace a part of the rigid force value of the spring for shock-absorbing support, thereby bringing a softer and more comfortable riding feeling to the rider.

[0022] An upper limit seat 24 and a lower limit seat 26 are also fixedly connected to the rod body of the shock-absorbing inner rod 22. A limit sleeve 25 is provided on the rod body of the shock-absorbing inner rod 22. The two ends of the limit sleeve 25 are respectively abutted between the upper limit seat 24 and the lower limit seat 26. The upper end of the shock-absorbing compression spring 23 is abutted under the lower limit seat 26. A limit tube body with a certain length can be formed on the rod body of the shock-absorbing inner rod 22 through the upper limit seat 24, the limit sleeve 25 and the lower limit seat 26, so that the shock-absorbing compression spring 23 can always be in a compressed state, so as to achieve a better shock-absorbing effect. In addition, the installation positions of the upper limit seat 24 and the lower limit seat 26 on the rod body of the shock-absorbing inner rod 22 can be adjusted, so as to adjust the compression condition of the shock-absorbing compression spring 23 to meet different shock-absorbing requirements.

[0023] A positioning block 28 and an anti-loosening spring 29 are also sleeved on the rod body of the shock-absorbing inner rod 22. The positioning block 28 is fixed to the upper end of the support inner tube 11 through a concave-convex groove. The anti-loosening spring 29 is abutted between the positioning block 28 and the movable side valve seat 210, so that the support inner tube 11 and the shock-absorbing inner rod 22 are combined and connected together through the positioning block 28. The anti-loosening spring 29 can ensure that the movable side damping lifting assembly is more firmly connected to the shock-absorbing inner rod 22.

[0024] The open bottom end of the tension side movable rod 2 is connected with a movable side end clamping ring 214 , an outer sealing ring 213 is arranged between the tension side movable rod 2 and the compression side fixed rod 1 , and the movable side end clamping ring 214 is tightly attached to the rod wall of the compression side fixed rod 1 .

[0025] Working principle: When the active rod 2 on the stretching side is compressed downward for shock absorption, the hydraulic oil in the supporting inner tube 11 can flow to the outside of the tube through the valve plate assembly arranged between the compression side valve seat 14 and the compression side damping piston 13, thereby generating hydraulic damping on the compression side, which can then absorb most of the vibration and impact force, giving the rider a softer and more comfortable riding experience; when the active rod 2 on the stretching side is compressed downward for shock absorption and moves upward to restore its original state, the hydraulic oil outside the supporting inner tube 11 can flow to the inside of the tube through the valve plate assembly arranged between the movable side valve seat 210 and the movable side damping piston 211, thereby generating hydraulic damping on the movable side, so as to prevent the active rod 2 on the stretching side from quickly returning to its original state, and also absorbing most of the impact force.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An inverted front shock absorber compression side damping lifting mechanism, comprising a compression side fixed rod (1), a tension side movable rod (2) and a connecting base (3), characterized in that: The tension side movable rod (2) is movably connected to the upper end of the compression side fixed rod (1); the connection base (3) is fixedly connected to the bottom end of the compression side fixed rod (1); a compression side damping lifting assembly is fixedly connected to the cavity opened by the compression side fixed rod (1); a shock absorbing inner rod (22) is fixedly connected to the tension side movable rod (2); the bottom end of the shock absorbing inner rod (22) is connected to the movable side damping lifting assembly; the cavity opened by the compression side fixed rod (1) is filled with hydraulic oil; and a support inner tube (11) is connected between the compression side damping lifting assembly and the movable side damping lifting assembly; The compression side damping lifting assembly comprises a compression side hydraulic damping base (12), a compression side damping piston (13), a compression side valve seat (14) and a compression side self-locking nut (15); the compression side hydraulic damping base (12) is fixedly connected to the bottom end of a cavity opened by a compression side fixing rod (1) by means of bolts; the compression side valve seat (14) and the compression side damping piston (13) are sequentially sleeved on the compression side hydraulic damping base (12) from top to bottom; the compression side self-locking nut (15) is thread-locked and fixed to the upper end of the compression side hydraulic damping base (12); and a valve plate assembly is provided between the compression side valve seat (14) and the compression side damping piston (13); The movable side damping lifting assembly comprises a movable side valve seat (210), a movable side damping piston (211) and a movable side self-locking nut (212); the movable side valve seat (210) and the movable side damping piston (211) are sequentially sleeved on the bottom end of the shock-absorbing inner rod (22) from top to bottom; the movable side self-locking nut (212) is threadedly locked and fixed on the bottom end of the shock-absorbing inner rod (22); and a valve plate assembly is arranged between the movable side valve seat (210) and the movable side damping piston (211).

2. The inverted front shock absorber compression side damping lifting mechanism according to claim 1, characterized in that: The valve plate assembly comprises a butterfly spring (4), a main valve plate (5), a large valve plate (6) and a small valve plate (7); the butterfly spring (4), the main valve plate (5), the large valve plate (6) and the small valve plate (7) are stacked in sequence from top to bottom; a plurality of valve holes (51) are provided on the main valve plate (5); the large valve plate (6) and the small valve plate (7) are arranged in a stepped manner; the body of the large valve plate (6) is closely attached to the bottom of the valve hole (51).

3. The inverted front shock absorber compression side damping lifting mechanism according to claim 2, characterized in that: The compression side damping piston (13) is provided with a compression side liquid guide channel (131), and the lower end tube body of the support inner tube (11) is provided with a hydraulic oil outlet hole (16), and the hydraulic oil outlet hole (16) is connected to the compression side liquid guide channel (131).

4. The inverted front shock absorber compression side damping lifting mechanism according to claim 3, characterized in that: The movable side damping piston (211) is provided with a movable side liquid guide channel (2111), and the upper end tube body of the supporting inner tube (11) is provided with a hydraulic oil introduction hole (215), and the hydraulic oil introduction hole (215) is connected to the movable side liquid guide channel (2111).

5. The inverted front shock absorber compression side damping lifting mechanism according to claim 1, characterized in that: The upper end of the stretching side movable rod (2) is fixedly connected to a top fixing seat (21), the upper end of the shock-absorbing inner rod (22) is fixedly connected to the top fixing seat (21), and a shock-absorbing compression spring (23) and a movable clamping seat (27) are movably sleeved on the rod body of the shock-absorbing inner rod (22), and the movable clamping seat (27) is clamped between the shock-absorbing compression spring (23) and the supporting inner tube (11).

6. The inverted front shock absorber compression side damping lifting mechanism according to claim 5, characterized in that: An upper limit clamping seat (24) and a lower limit clamping seat (26) are fixedly connected to the rod body of the shock-absorbing inner rod (22); a limit sleeve (25) is sleeved on the rod body of the shock-absorbing inner rod (22); two ends of the limit sleeve (25) respectively abut between the upper limit clamping seat (24) and the lower limit clamping seat (26); and the upper end of the shock-absorbing compression spring (23) abuts below the lower limit clamping seat (26).

7. The inverted front shock absorber compression side damping lifting mechanism according to claim 6, characterized in that: A positioning block (28) and an anti-loosening spring (29) are also sleeved on the rod body of the shock-absorbing inner rod (22); the positioning block (28) and the upper end of the supporting inner tube (11) are clamped together via a concave-convex groove; and the anti-loosening spring (29) is abutted between the positioning block (28) and the movable side valve seat (210).

8. The inverted front shock absorber compression side damping lifting mechanism according to claim 7, characterized in that: The open bottom end of the stretching side movable rod (2) is connected to a movable side end clamping ring (214), an outer sealing ring (213) is provided between the stretching side movable rod (2) and the compression side fixed rod (1), and the movable side end clamping ring (214) is tightly attached to the rod wall of the compression side fixed rod (1).

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