A dual-adjust shock absorber

Abstract

The present application relates to a kind of double adjustment shock absorber, it mainly solves the smaller adjustment range of shock absorber applied in locomotive in prior art, cause the problem of poor convenience of use, including mounting seat, hydraulic cylinder, inner tube, air bag device, two adjusting devices, sealing cover, hydraulic rod, piston, compression spring, first support seat and second support seat, the mounting seat is located in the axial one end of hydraulic cylinder, the sealing cover is located in the axial other end of hydraulic cylinder, a cavity is formed by mounting seat, hydraulic cylinder and sealing cover, the inner tube is located in cavity, and the axial both ends of inner tube are connected with mounting seat and sealing cover respectively, a hydraulic chamber is formed by mounting seat, inner tube and sealing cover, the lower portion of the inner tube is equipped with several first through holes, which are connected with the cavity and the hydraulic chamber, each first through hole is located in the same circumference length of the inner tube, the middle part of the inner tube is equipped with at least two second through holes, which are connected with the cavity and the hydraulic cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to a double-adjustable shock absorber. BACKGROUND

[0002] A shock absorber is a commonly used machine tool, automobile parts. The demand for shock absorbers is due to the fact that springs cannot stabilize immediately, that is, after the spring is compressed and released, it will continue to compress and relax for a period of time, so the shock absorber can absorb the vibration caused by the bumps on the road, making the ride more comfortable. The existing shock absorber generally includes a compression cylinder fixed to the vehicle body, which contains high-viscosity damping oil inside, and a piston is provided. One end of the compression cylinder penetrates a connecting rod, one end of the connecting rod is fixed to the wheel frame of the vehicle wheel, and the other end is fixed to the piston inside the compression cylinder, and the outside of the connecting rod is provided with a spring. When braking, the vehicle body can drive the piston through the connecting rod to compress the damping oil inside the compression cylinder, thereby obtaining a buffering effect.

[0003] The applicant applied for a patent application No. 201920096657.0 on January 21, 2019, and the patent name is a shock absorber. It discloses a shock absorber in detail, which includes a base, a hydraulic cylinder and a gas cylinder are respectively arranged on the base, a flow channel for damping oil flow is arranged between the hydraulic cylinder and the gas cylinder, an adjusting device for adjusting the cross-sectional area of the flow channel is arranged on the flow channel, a piston rod is arranged in the hydraulic cylinder, a spring is arranged outside the hydraulic cylinder, one end of the spring is arranged on the hydraulic cylinder, and the other end is arranged on the outer end of the piston rod, a piston is arranged on the inner end of the piston rod, a buffer device for relieving the impact force of the tail end of the piston rod is arranged on one end of the piston rod close to the base, the buffer device includes a lower support fixed on the piston rod and an upper support sliding along the piston rod, the upper support and the lower support are gap-fitted with the inner surface of the hydraulic cylinder, a positioning block is arranged on the inner end of the piston rod to prevent the upper support from sliding out, a guide sleeve is arranged on the lower support, the lower support and the guide sleeve are penetratingly arranged, a guide rod is arranged on the upper support to cooperate with the guide sleeve, a buffer spring is arranged outside the guide rod between the upper support and the lower support, the length of the guide rod is greater than the length of the guide sleeve, the length of the guide rod is less than the distance between the lower support and the positioning block, and a through hole is arranged on the circumferential outer surface of the guide sleeve close to the lower support. The shock absorber adjusts the cross-sectional area of the flow channel by arranging the adjusting device, so that the speed of the damping oil in the hydraulic cylinder flowing into the gas cylinder after the piston rod is pressed, thereby adjusting the hardness of the shock absorber. When the force on the piston rod is too large, the buffer device is arranged to reduce the impact effect of the damping oil after the tail end of the piston rod moves and the damping oil is discharged into the gas cylinder, thereby improving the comfort.

[0004] In the test of the vehicle, it is found that the shock absorption of the shock absorber is through the heat consumption of the piston extruding the damping oil flow to eliminate the vibration, and due to the light weight of the motorcycle, when the number of the passengers increases from one adult to two adults, the load bearing capacity of the shock absorber increases greatly, and the flow size of the flow channel matched with one adult passenger adjusted by the adjusting device does not meet the requirements, specifically, the compression stroke of the shock absorber is large and the energy consumption of the damping oil is small when the motorcycle is in the state of not running and the passengers are riding, the shock absorber is difficult to support, so that the motorcycle shakes during driving, the operability and comfort are both decreased, and the shock absorber is easy to touch the bottom in the case of large vibration, causing the damage of the shock absorber; when the flow size of the flow channel matched with two adult passengers is adjusted by the adjusting device, the hardness of the shock absorber is large in the case of one adult passenger, and the shock absorption effect is not obvious, so repeated adjustment is needed, and the adjustment of the adjusting device needs special tools for adjustment, and the convenience of use is poor. SUMMARY

[0005] Therefore, in order to solve the above problems, the present application provides a double-adjustment shock absorber, which mainly solves the problem of small adjustment range of the shock absorber applied to the motorcycle in the prior art, causing poor convenience of use.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] The double-adjustable shock absorber comprises a mounting seat, a hydraulic cylinder, an inner cylinder, a gas bag device, two adjusting devices, a sealing cover, a hydraulic rod, a piston, a compression spring, a first support seat and a second support seat, the mounting seat is arranged at one end of the hydraulic cylinder in the axial direction, the sealing cover is arranged at the other end of the hydraulic cylinder in the axial direction, a cavity is formed by the mounting seat, the hydraulic cylinder and the sealing cover, the inner cylinder is arranged in the cavity, and the two ends of the inner cylinder in the axial direction are connected with the mounting seat and the sealing cover respectively, a hydraulic chamber is formed by the mounting seat, the inner cylinder and the sealing cover, the lower part of the inner cylinder is provided with a plurality of first through holes which communicate the cavity and the hydraulic chamber, the first through holes are located at the same circumference of the inner cylinder, the middle part of the inner cylinder is provided with at least two second through holes which communicate the cavity and the hydraulic cylinder, the hydraulic rod is arranged in the inner cylinder and extends outward through the sealing cover, the piston is arranged at the inner end of the hydraulic rod, the side wall of the piston is attached to the inner surface of the inner cylinder, the first support seat is arranged at the outer end of the piston rod, the second support seat is threadedly connected to the outer surface of the hydraulic cylinder, the compression spring is sleeved on the hydraulic cylinder, and the two ends of the compression spring are respectively abutted against the first support seat and the second support seat, the mounting seat is provided with two first mounting grooves and a second mounting groove, the hydraulic chamber and one of the first mounting grooves are provided with a first flow channel, the cavity and the other first mounting groove are provided with a second flow channel, the middle part of the two first mounting grooves is penetrated, the two first mounting grooves and the second mounting groove are provided with a third flow channel, the two adjusting devices are arranged in the two first mounting grooves respectively, the gas bag device is arranged in the second mounting groove, the included angle between the vertical line of the central axes of the two first mounting grooves and the central axis of the hydraulic cylinder is 15°-45°, and the included angle between the central axis of one of the first mounting grooves and the horizontal plane is 15°-45°.

[0008] Further, the number of the second through holes is three, which are a second through hole A, a second through hole B and a second through hole C, the second through hole A, the second through hole B and the second through hole C are sequentially distributed along the axial direction of the inner cylinder, the distance size ratio between the center of one of the first through holes and the center of the second through hole A which are located on the same straight line and the length size of the inner cylinder is 1:2.7-3.2.

[0009] Further, the distance size ratio between the center of the second through hole A and the center of the second through hole B and the distance size ratio between the center of the second through hole B and the center of the second through hole C is 1:1-2.5, and the distance size of the center of the second through hole A and the center of the second through hole B is 8mm-20mm.

[0010] Further, the diameter size of the first through hole is greater than the diameter size of the second through hole.

[0011] Further, the mounting seat is provided with a first threaded hole communicating the first flow channel with the outside, and a first bolt is threadedly connected to the first threaded hole.

[0012] Further, the mounting seat is provided with a second threaded hole communicating the second flow channel with the outside, and a second bolt is threadedly connected to the second threaded hole.

[0013] Further, the mounting seat is provided with a third threaded hole connecting the third flow channel with the outside, and a third bolt is threadedly connected to the third threaded hole.

[0014] Further, the adjusting device comprises a valve body, a valve rod, a valve sheet and a first spring, the valve body is provided with a valve hole, the valve body comprises a first part, a second part and a third part connected integrally, the diameter size of the second part is smaller than that of the first part and the third part, so that the second part forms a concave annular groove, the first part is provided with a notch communicating with the valve hole, at least two first communication holes are arranged around the circumferential outer surface of the second part, each first communication hole respectively communicates with the valve hole, a plurality of second communication holes are arranged on the third part and located at the side of the second part, each second communication hole respectively communicates with the annular groove, the valve sheet and the first spring are arranged on the lower side of the third part, the valve sheet covers each second communication hole by being pressed by the first spring, the valve rod has a threaded part provided with external threads and a tapered part having a tapered mechanism at one end, the valve rod is arranged in the valve hole, the threaded part is threadedly connected with the first part, and the tapered part extends into the second part, the up and down movement of the valve rod is driven by rotating the valve rod, so that the tapered part adjusts the flow of oil passing through the valve hole and the first flow communication hole, and a clamping groove is arranged on the end of the valve rod away from the tapered part.

[0015] Further, the bottom of the third part is inwardly concave to form a clearance groove, and the valve sheet and the spring are distributed in the clearance groove.

[0016] By adopting the aforementioned technical solution, the beneficial effects of this invention are as follows: When the shock absorber is impacted, the impact force drives the piston rod to move inward, causing the piston at the inner end of the piston rod to squeeze the damping oil in the upper part of the hydraulic chamber. In the initial stage of the piston rod's inward movement, the piston squeeze causes a portion of the damping oil to overflow from the cavity through the second through-hole, while another portion flows into the airbag device through the first and third flow channels and enters the cavity through the first and second flow channels. The damping oil in the cavity then enters the lower part of the hydraulic chamber through the first through-hole. Therefore, the piston rod... In the initial stage of compression, the damping oil in the upper part of the hydraulic chamber enters the lower part of the hydraulic chamber through an overflow channel formed by the second through hole, the cavity, and the first through hole. This reduces the flow path length of the damping oil, thereby reducing its energy loss. Furthermore, this structure increases the flow path size of the damping oil, resulting in a faster piston rod response speed. This avoids a significant impact sensation due to the high viscosity of the damping oil in the initial movement, improving comfort. As the piston rod moves further inward, the piston passes through the second through hole, ensuring that both the first and second through holes are located on the lower side of the piston. At this time, the damping oil in the upper part of the hydraulic chamber, squeezed by the piston, flows into the airbag device through the first and third flow channels, and enters the cavity through the first and second flow channels. The damping oil in the cavity then enters the lower part of the hydraulic chamber through the first through hole. In this way, the damping oil is circulated. Through multi-path flow, the energy in the damping oil is consumed, thereby eliminating the impact on the shock absorber and providing a supporting role. It is highly convenient to use. Furthermore, the angle between the vertical line connecting the central axes of the two first mounting slots and the central axis of the hydraulic cylinder is 15° to 45°. The angle between the central axis of the mounting groove and the horizontal plane is set at 15° to 45°, which facilitates the adjustment of the adjustment device. At the same time, during the compression process of the shock absorber, the damping oil in the first mounting groove, which is connected to the first flow channel, is facilitated to enter the third flow channel and then enter the airbag device. When the pressure in the airbag device increases to balance the pressure difference with the other first mounting groove 16, it enters the cavity through the second flow channel, thereby improving the damping effect of the shock absorber. In addition, the damping oil can flow well through the first and third flow channels during the initial compression process, thereby reducing the feeling of hitting the wall. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of the present invention;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of another view of Embodiment 1 of the present invention;

[0019] Figure 3 This is an exploded structural diagram of Embodiment 1 of the present invention;

[0020] Figure 4is the stereogram of the first perspective view of the mounting seat in the embodiment one of the present application;

[0021] Figure 5 is the stereogram of the second perspective view of the mounting seat in the embodiment one of the present application;

[0022] Figure 6 is the stereogram of the third perspective view of the mounting seat in the embodiment one of the present application;

[0023] Figure 7 is the stereogram of the fourth perspective view of the mounting seat in the embodiment one of the present application;

[0024] Figure 8 is the exploded view of the adjusting device in the embodiment one of the present application;

[0025] Figure 9 is the sectional view of the adjusting device in the embodiment one of the present application;

[0026] Figure 10 is the flow direction diagram of the damping oil in the initial stage of the shock absorber under impact force in the embodiment one of the present application;

[0027] Figure 11 is the flow direction diagram of the damping oil in the compression stage of the shock absorber under impact force in the embodiment one of the present application;

[0028] Figure 12 is the sectional view of the piston in the embodiment two of the present application;

[0029] Figure 13 is the flow direction diagram of the damping oil on the piston in the initial stage of the shock absorber under impact force in the embodiment two of the present application;

[0030] Figure 14 is the top view of the piston in the embodiment two of the present application. DETAILED DESCRIPTION

[0031] The present application will be further described in conjunction with the drawings and specific embodiments.

[0032] The embodiment of the present application is:

[0033] Reference Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7As shown, a double-adjustable shock absorber comprises a mounting seat 1, a hydraulic cylinder 2, an inner cylinder 3, a gas bag device 4, two adjusting devices 5, a sealing cover 6, a hydraulic rod 7, a piston 8, a compression spring 9, a first support seat 10 and a second support seat 11, the mounting seat 1 is arranged at one axial end of the hydraulic cylinder 2, the sealing cover 6 is arranged at the other axial end of the hydraulic cylinder 2, a cavity 12 is formed by the mounting seat 1, the hydraulic cylinder 2 and the sealing cover 6, the inner cylinder 3 is arranged in the cavity 12, and the two axial ends of the inner cylinder 3 are connected with the mounting seat 1 and the sealing cover 6 respectively, a hydraulic cavity 13 is formed by the mounting seat 1, the inner cylinder 3 and the sealing cover 6, the lower part of the inner cylinder 3 is provided with six first through holes 14 which communicate the cavity 12 and the hydraulic cavity 13, each of the first through holes 14 is located at the same circumference of the inner cylinder 3, the middle part of the inner cylinder 3 is provided with at least two second through holes 15 which communicate the cavity 12 and the hydraulic cavity 13, the hydraulic rod 7 is arranged in the inner cylinder 2, and the lower end of the hydraulic rod 7 extends outward through the sealing cover 6, the piston 8 is arranged at the inner end of the hydraulic rod 7, the side wall of the piston 8 is attached to the inner surface of the inner cylinder 3, the first support seat 10 is arranged at the outer end of the piston rod 7, the second support seat 11 is threadedly connected to the outer surface of the hydraulic cylinder 2, the compression spring 9 is sleeved on the hydraulic cylinder 2, and the two ends of the compression spring 9 abut against the first support seat 10 and the second support seat 11 respectively, the compression stroke of the compression spring 9 is adjusted by rotating the second support seat 11, thereby adjusting the compression damping of the shock absorber, the mounting seat 1 is provided with two first mounting grooves 16 and one second mounting groove 17, the hydraulic cavity 13 and one of the first mounting grooves 16 are provided with a first flow channel 18, the cavity 12 and the other first mounting groove 16 are provided with a second flow channel 19, the middle part of each of the first mounting grooves 16 is penetrated, the two first mounting grooves 16 and the second mounting groove 17 are provided with a third flow channel 20, the two adjusting devices 5 are arranged in the two first mounting grooves 16 respectively, the gas bag device 4 is arranged in the second mounting groove 17, the included angle between the vertical line a of the middle axes of the two first mounting grooves 16 and the middle axis b of the hydraulic cylinder 2 is 15°-45°, preferably 30°, the included angle between the middle axis c of one of the first mounting grooves 16 and the horizontal plane d is 15°-45°, preferably 15°, and the opening of the first mounting groove 16 faces downward, which is convenient for adjusting the adjusting device 5, and at the same time, is conducive to the damping oil in the first mounting groove 16 which communicates with the first flow channel 18 to enter the third flow channel 20, and then enter the gas bag device 4, when the pressure in the gas bag device 4 increases to balance the pressure difference with the other first mounting groove 16, the damping oil enters the cavity 12 through the second flow channel 19, thereby improving the damping effect of the shock absorber, and the damping oil can flow better through the first flow channel 18 and the third flow channel 20 in the initial compression process, thereby reducing the wall impact feeling.

[0034] The double-adjustable shock absorber is used for Figure 10As shown, when the shock absorber is impacted, the impact force drives the piston rod 7 to move inward, so that the piston 8 at the inner end of the piston rod 7 extrudes the damping oil in the upper part of the hydraulic chamber 13. In the initial stage of the inward movement of the piston rod 7, a part of the damping oil is extruded by the piston 8 to overflow the cavity through the second through hole 15, another part of the damping oil flows into the air bag device 4 through the first flow channel 18 and the third flow channel 20, and into the cavity 12 through the first flow channel 18 and the second flow channel 19, and the damping oil in the cavity 12 enters the lower part of the hydraulic chamber 13 through the first through hole 14. Therefore, in the initial stage of compression of the piston rod 7, the damping oil in the upper part of the hydraulic chamber 13 forms an overflow channel through the second through hole 15, the cavity 13 and the first through hole 14 to enter the lower part of the hydraulic chamber 13, which can reduce the length of the damping oil flow path, thereby reducing the energy loss of the damping oil, and the structure increases the flow size of the damping oil, so that the movement response speed of the piston rod 7 is fast, avoiding the generation of a large impact feeling due to the large viscosity of the damping oil in the initial movement state, improving the comfort, and when the piston rod 7 further moves inward, referring to Figure 9 As shown, the piston 8 passes through the second through hole 15, so that the first through hole 14 and the second through hole 15 are distributed on the lower side of the piston 8. At this time, the damping oil in the upper part of the hydraulic chamber 13 is extruded by the piston 8 to flow into the air bag device 4 through the first flow channel 18 and the third flow channel 20, and into the cavity 12 through the first flow channel 18 and the second flow channel 19, and the damping oil in the cavity 12 enters the lower part of the hydraulic chamber 13 through the first through hole 14. In this way, the circulation flow of the damping oil is realized, the energy consumption in the damping oil is caused by the multi-path flow, so as to eliminate the impact on the shock absorber and play a supporting role;

[0035] And in the initial stage of the rebound of the piston rod 7, the piston rod 7 drives the piston 8 to extrude the damping oil in the lower part of the hydraulic cavity 13, the damping oil enters the cavity 12 through the first through hole 14 and the second through hole 15, and then enters the upper part of the hydraulic cavity 13 through the first flow channel 18 and the second flow channel 19, and at the same time, the damping oil in the air bag device 4 enters the upper part of the hydraulic cavity 13 through the first flow channel 18 and the third flow channel 20, realizing multi-path backflow. When the piston rod 7 further rebounds, the piston 8 passes through the second through hole 19, so that the first through hole 14 is separated from the second through hole 15, that is, the first through hole 14 is distributed in the lower part of the hydraulic cavity 13, and the second through hole 15 is distributed in the upper part of the hydraulic cavity 13. Part of the damping oil in the cavity 12 enters the upper part of the hydraulic cavity 13 through the second through hole 15, and the other part enters the upper part of the hydraulic cavity 13 through the first flow channel 18 and the second flow channel 19. The shock absorber with the above structure realizes automatic adjustment of the size of the damping oil flowing through the initial motion state through the cooperation of the hydraulic cylinder 2, the inner cylinder 3, the first through hole 14 and the second through hole 15 arranged on the inner cylinder 3, and the adjusting device 4. Therefore, the shock absorber can realize automatic adjustment of the flow under the condition of the adjusting device 4 adjusting the flow, so that the shock absorber realizes segmented damping adjustment, improves the convenience of use, and thus adapts to the change of the large amplitude carrying capacity of the shock absorber, and maintains good comfort and support.

[0036] And, referring to Figure 3 、 Figure 10 With Figure 11As shown, the number of the second through holes 15 is three, namely the second through hole A 151, the second through hole B 152 and the second through hole C 153, which are distributed along the axial direction of the inner cylinder in sequence. The distance between the center of the second through hole A 151 and the center of the second through hole B 152 is 8mm-20mm, preferably 15mm. The diameter of the first through hole 14 is larger than that of the second through hole 15, so that the adjustment change can be kept relatively stable in the initial stage of compression of the piston rod 7 and the movement of the end stage of the rebound of the piston rod 7, avoiding the sudden feeling caused by the large flow of damping oil, improving the comfort of use, and in the design of the distance between the center of the second through hole A 151 and the center of the second through hole B 152 being 8mm-20mm, the piston 8 can be kept between the first through hole 14 and the second through hole 15 to realize automatic adjustment. At the same time, the distance between the center of the second through hole A 151 and the center of the second through hole B 152 is 8mm-20mm, which can keep relatively stable operation with the compression spring 9.

[0037] Reference Figures 4 to 7As shown, the mounting seat 1 is provided with a first threaded hole 21 communicating the first flow channel 18 with the outside, the first threaded hole 21 is threadedly connected with a first bolt 22, the mounting seat 1 is provided with a second threaded hole 23 communicating the second flow channel 19 with the outside, the second threaded hole 23 is threadedly connected with a second bolt 24, the mounting seat 1 is provided with a third threaded hole 25 connecting the third flow channel 20 with the outside, the third threaded hole 25 is threadedly connected with a third bolt 26, the central axes of the first threaded hole 21, the second threaded hole 23 and the third threaded hole 25 are parallel to the horizontal plane, the connecting position of the two first mounting grooves 16 is provided with a fourth threaded hole 27 communicating with the outside, the central axis of the fourth threaded hole 27 is perpendicular to the connecting line of the central axes of the two first mounting grooves 16, the fourth threaded hole 27 is threadedly connected with a fourth bolt 28, the first threaded hole 21, the second threaded hole 23, the third threaded hole 25 and the fourth threaded hole 27 are arranged to facilitate the replacement of damping oil, and facilitate the maintenance, dredging and maintenance of the shock absorber, and reduce the maintenance cost of the shock absorber.

[0038] In this embodiment, reference is made to Figure 8 and Figure 9As shown, the adjusting device 5 comprises a valve body 51, a valve rod 52, a valve sheet 53 and a first spring 54, the valve body 51 is provided with a valve hole 55, the valve body 51 comprises a first part 511, a second part 512 and a third part 513 which are integrally connected, the diameter size of the second part 512 is smaller than that of the first part 511 and the third part 513, so that the second part 512 forms an inner concave annular groove 56, the first part 511 is provided with a notch 57 which communicates with the valve hole 55, at least two first communication holes 58 are arranged around the circumferential outer surface of the second part 512, each of the first communication holes 58 respectively communicates with the valve hole 55, a plurality of second communication holes 59 are arranged on the third part 513 and located at the side of the second part 512, each of the second communication holes 59 respectively communicates with the annular groove 56, the valve sheet 53 and the first spring 54 are arranged on the lower side of the third part 513, the valve sheet 53 is covered on each of the second communication holes 59 by the extrusion of the first spring 54, the valve rod 52 has a threaded part 521 provided with external threads and a tapered part 522 having a tapered mechanism at one end, the valve rod 52 is arranged in the valve hole 55, the threaded part 521 is threadedly connected with the first part 511, and the tapered part 522 extends into the second part 512, the up and down movement of the valve rod 52 is driven by rotating the valve rod 52, so that the tapered part 522 adjusts the flow of oil through the valve hole 55 and the first communication hole 58, the end of the valve rod 52 away from the tapered part 522 is provided with a clamping groove 60, the bottom of the third part 513 is inwardly concave and provided with a clearance groove 61, the valve sheet 53 and the first spring 54 are distributed in the clearance groove 61, the clamping groove 60 on the valve rod is clamped by an external device such as a knob or a handle, and the up and down movement of the valve rod 52 along the axial direction of the valve hole 55 is realized by rotating the valve rod 52, and then the tapered part 522 of the valve rod 52 adjusts the flow of oil through the valve hole 55 and the first communication hole 58, this kind of mode can realize larger adjustment while the valve rod 52 travels smaller stroke, reduce the damping effect on the flow of damping oil, improve the flow rate of oil, specifically, in the compression process of the shock absorber, the damping oil enters the annular groove 56 through the valve hole 55 and the first communication hole 58, realizes the flow from one cavity to another cavity, at this time the oil is in the extrusion state, so that the valve sheet 53 abuts against the valve body 51 and covers the second communication hole 59, in the rebound process of the shock absorber, part of the oil enters the valve hole 55 through the annular groove 56 and the second communication hole 59, and the other part flows through the second communication hole 59, realizes rapid rebound, plays sufficient supporting property, and then rapidly reduces the after-shock generated by impact, improves the use effect, and the notch 57 arranged on the first part 511 facilitates the disassembly and installation of the valve rod 52, this kind of structure is simple and convenient to adjust; further, the clearance groove 60 arranged on the third part 513, the valve sheet 53 and the first spring 54 are distributed in the clearance groove 60, play the positioning and guiding role, prevent the deviation of the valve sheet 53, and improve the reliability and stability of use.

[0039] Further, in the above-mentioned embodiment, the flow size of the damping oil is automatically adjusted only by the second through hole A 151, the second through hole B 152, and the second through hole C 153, and the adjustment range is relatively small, that is, it can adapt to relatively flat road riding. However, in the case of a large impact, the piston 8 is blocked by the damping oil, and the reaction speed is relatively slow, so that the shock absorber produces a kind of wall hitting feeling, and the experience is poor. Therefore, the following design is adopted to improve the comfort of use. Specifically:

[0040] Reference Figure 12 、 Figure 14 As shown in the drawings, the piston 8 includes a piston seat 81 fixed on the upper end of the piston rod 7, a sliding seat 82 sleeved on the piston seat 81, a fixed plate 83, a locking nut 84 and a second spring 85. The piston seat 81 includes a sleeve body 811 sleeved on the piston rod 7 and locked and connected with the piston rod 7, and a closed body 812 arranged at the lower end of the sleeve body 811. The sleeve body 811 is integrally connected with the closed body 812. A first curved surface structure 86 is arranged at the connection between the sleeve body 811 and the closed body 812. The outer surface of the sleeve body 811 is provided with convex strips 87 distributed along the axial direction thereof. The middle part of the sliding seat 82 is provided with a mounting hole, and the surface of the mounting hole is provided with a sliding groove 88. The depth size of the sliding groove 88 is smaller than the height size of the convex strips 87, so that when the sliding seat 82 is arranged on the sleeve body 811, a connecting flow channel 89 is formed between the sliding seat 82 and the sleeve body 811. A second curved surface structure 90 cooperating with the first curved surface structure 86 is arranged on the sliding seat 82 and located at the lower part of the mounting hole. The fixed plate 83 is fixed on the piston rod 7 and located at the lower side of the piston seat 81. The second spring 85 is sleeved on the piston rod 7, and the two ends of the second spring 85 abut against the upper surface of the fixed plate 83 and the lower surface of the sliding seat 82, respectively. The locking nut 84 is threadedly connected to the upper end of the piston rod 7. The upper end of the sliding seat 82 abuts against the locking nut 84 through the second spring 85, and the locking nut 84 covers the connecting flow channel 89. At least one annular groove 91 is arranged on the outer surface of the sliding seat 82, and preferably two annular grooves 91 are arranged. A sealing ring 92 is embedded in each annular groove 91.

[0041] Reference Figure 13When the piston rod is impacted by a large impact, the slide block of the piston is blocked by the damping oil, and the reaction speed is relatively slow. Thus, the piston extrudes the second spring to move inward, so that the slide block moves relative to the piston rod, thereby separating the slide block from the locking nut, and further opening the connecting flow channel, so that the upper part of the hydraulic cylinder is communicated with the lower part. Thus, the size of the damping oil flowing through is increased, and the flow efficiency of the damping oil is further improved. When the impact force decreases, the upper end of the slide block is pushed against the locking nut under the action of the second spring, and the locking nut cover is arranged on the connecting flow channel, so that the connecting flow channel is closed. Thus, the damping oil is adjusted by the second through hole and the adjusting device, the adjusting path of the initial stage of the shock absorber is increased, and the comfort of the shock absorber is further improved.

[0042] Although the present application has been specifically shown and described with respect to the preferred embodiments, it should be understood that various changes in form and detail can be made without departing from the spirit and scope of the application as defined in the appended claims.

Claims

1. A dual-adjustable shock absorber, characterized in that: The device includes a mounting base, a hydraulic cylinder, an inner cylinder, an airbag device, two adjusting devices, a sealing cap, a hydraulic rod, a piston, a compression spring, a first support base, and a second support base. The mounting base is located at one axial end of the hydraulic cylinder, and the sealing cap is located at the other axial end of the hydraulic cylinder. The mounting base, hydraulic cylinder, and sealing cap form a cavity. The inner cylinder is located within the cavity, and its two axial ends are connected to the mounting base and the sealing cap, respectively. The mounting base, inner cylinder, and sealing cap form a hydraulic chamber. The lower part of the inner cylinder has several first through holes connecting the cavity and the hydraulic chamber, each first through hole located on the same circumference of the inner cylinder. The middle part of the inner cylinder has at least two second through holes connecting the cavity and the hydraulic cylinder. The hydraulic rod passes through the inner cylinder, with its lower end extending outward through the sealing cap. The piston is located at the inner end of the hydraulic rod, and the sidewall of the piston is attached to the inner surface of the inner cylinder. A support seat is located at the outer end of the piston rod, and a second support seat is threadedly connected to the outer surface of the hydraulic cylinder. The compression spring is sleeved on the hydraulic cylinder, and its two ends abut against the first support seat and the second support seat, respectively. The mounting seat is provided with two first mounting slots and one second mounting slot. The hydraulic chamber is connected to one of the first mounting slots and has a first flow channel. The cavity is connected to the other first mounting slot and has a second flow channel. The middle of the two first mounting slots is through-connected. The two first mounting slots and the second mounting slot are connected by a third flow channel. The two adjustment devices are respectively located in the two first mounting slots. The airbag device is located in the second mounting slot. The angle between the vertical line connecting the central axes of the two first mounting slots and the central axis of the hydraulic cylinder is 15° to 45°. The angle between the central axis of one of the first mounting slots and the horizontal plane is 15° to 45°.

2. The dual-adjustable shock absorber according to claim 1, characterized in that: There are three second through holes, namely second through hole A, second through hole B and second through hole C. The second through holes A, B and C are distributed along the axial direction of the inner cylinder. The ratio of the distance between the center of the first through hole and the center of the second through hole A, which are on the same straight line as the second through hole A, B and C, and the length of the inner cylinder is 1:2.7 to 3.

2.

3. The dual-adjustable shock absorber according to claim 2, characterized in that: The ratio of the distance between the center of the second through hole A and the center of the second through hole B to the distance between the center of the second through hole B and the center of the second through hole C is 1:1 to 2.5, and the distance between the center of the second through hole A and the center of the second through hole B is 8mm to 20mm.

4. The dual-adjustable shock absorber according to claim 3, characterized in that: The diameter of the first through hole is larger than the diameter of the second through hole.

5. The dual-adjustable shock absorber according to claim 1, characterized in that: The mounting base is provided with a first threaded hole that connects the first flow channel to the outside, and a first bolt is threadedly connected to the first threaded hole.

6. The dual-adjustable shock absorber according to claim 1, characterized in that: The mounting base is provided with a second threaded hole that connects the second flow channel to the outside, and a second bolt is threadedly connected to the second threaded hole.

7. The dual-adjustable shock absorber according to claim 1, characterized in that: The mounting base is provided with a third threaded hole that connects the third flow channel to the outside, and a third bolt is threadedly connected to the third threaded hole.

8. The dual-adjustable shock absorber according to any one of claims 1 to 7, characterized in that: The regulating device includes a valve body, a valve stem, a valve plate, and a first spring. The valve body has a valve hole and includes a first part, a second part, and a third part integrally connected. The diameter of the second part is smaller than the diameters of the first part and the third part, forming a concave annular groove. The first part has a notch communicating with the valve hole. At least two first connecting holes are provided around the outer circumference of the second part, each communicating with the valve hole. The third part has several second connecting holes on its periphery of the second part, each communicating with the annular groove. The valve plate and the first spring are located on the lower side of the third part. The valve plate covers each of the second connecting holes by compression from the first spring. The valve stem has a threaded part with external threads and a tapered part with a tapered mechanism at one end. The valve stem passes through the valve hole, with its threaded part threaded to the first part and the tapered part extending into the second part. Rotating the valve stem causes it to move up and down, allowing the tapered part to regulate the flow rate of oil through the valve hole and the first flow hole. The end of the valve stem away from the tapered part has a retaining groove.

9. The dual-adjustable shock absorber according to claim 8, characterized in that: The bottom of the third part is recessed inward with a relief groove, and the valve plate and spring are distributed in the relief groove.

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