Bidirectional damping shock absorber and unicycle

Abstract

and a tube connecting the dischar e side of the pump with a plug in the forward end of the crank case, said tube having a check valve in it at the pump end, and said former tube which connects the pump to the oil drain plug, which has a check valve in it at the pump end, and said former tube which connects the pump to the oil drain plug, which has a check valve in it at the pump end.

Description

Technical Field

[0001] The present invention relates to the technical field of electric unicycles, and in particular to a bidirectional damping shock absorber and a unicycle. Background Art

[0002] Shock absorbers are a commonly used motorcycle spare part. The need for shock absorbers is due to the fact that springs cannot stabilize immediately after deformation and will continue to be compressed and relaxed for a period of time. Therefore, shock absorbers can absorb the vibrations caused by the wheels encountering uneven roads, making the ride comfortable. Existing shock absorbers generally include a pressure cylinder fixed to the vehicle body, which contains high-viscosity damping oil and is provided with a piston. A connecting rod is passed through one end of the pressure cylinder, one end of the connecting rod is fixed to the wheel rim, and the other end is fixed to the piston in the pressure cylinder, and a spring is provided on the outside of the connecting rod. When encountering uneven roads or braking, the vehicle body can drive the piston through the connecting rod to compress the damping oil inside the pressure cylinder, thereby achieving a cushioning effect.

[0003] Common shock absorbers on the market are usually equipped with a hydraulic cylinder and a pneumatic cylinder, and use the damping force generated by the back-and-forth flow of damping oil in the hydraulic cylinder and the pneumatic cylinder to absorb vibrations. However, the number of adjustment devices and internal pipelines of the shock absorber is usually small, resulting in insufficient flow path of the damping oil, causing the damping effect to be blocked and difficulty in adjusting the shock absorption force; on the other hand, since the flow path of the damping oil is usually a one-way circulation flow, when encountering severely bumpy roads, the degree of buffering is insufficient, resulting in poor shock absorption effect, which brings a poor user experience. Summary of the Invention

[0004] In order to overcome at least one of the defects of the prior art described above, the present invention provides a bidirectional damping shock absorber and a unicycle that are easy to adjust the shock absorption force and have better shock absorption effect.

[0005] The technical solution adopted by the present invention to solve the problem is:

[0006] In a first aspect, the present invention provides a bidirectional damping shock absorber, comprising:

[0007] A hydraulic cylinder, wherein damping oil is provided in the hydraulic cylinder;

[0008] A pneumatic cylinder, the pneumatic cylinder being slidably connected to the oil pressure cylinder;

[0009] A pneumatic cylinder cover, the pneumatic cylinder cover is detachably connected to the pneumatic cylinder;

[0010] A connecting piece is provided in the pneumatic cylinder, one end of which is fixedly connected to the pneumatic cylinder cover, and the other end of which is passed through the oil-pressure cylinder, and an oil-pressure piston is sleeved on the connecting piece at one end of the oil-pressure cylinder, and the oil-pressure piston and the oil-pressure cylinder are arranged to slide relative to each other;

[0011] An oil pressure cylinder cover is provided at one end of the oil pressure cylinder barrel close to the air pressure cylinder barrel. The oil pressure cylinder cover is detachably connected to the oil pressure cylinder barrel. The connecting piece is passed through and slidably connected to the oil pressure cylinder cover.

[0012] The hydraulic piston divides the hydraulic cylinder into a first oil chamber and a second oil chamber, and the damping oil flows from one of the first oil chamber and the second oil chamber into the other through the connecting member.

[0013] Through such a setting, the damping oil cannot flow directly from one of the first oil chamber and the second oil chamber to the other. It needs to pass through a connecting piece to realize the change of the position of the damping oil in the first oil chamber and the second oil chamber. That is, when the damping oil is squeezed by the hydraulic piston, two-way circulation between the first oil chamber and the second oil chamber is realized, thereby increasing the buffering capacity and making the shock absorption effect better, thereby enhancing the user experience.

[0014] According to a preferred embodiment, the connecting piece includes a first oil pipe and a second oil pipe, the first oil pipe and the second oil pipe are both configured to be through, and one of the first oil pipe and the second oil pipe is sleeved on the other.

[0015] According to a preferred embodiment, the internal through-hole portion of the inner one of the first oil pipe and the second oil pipe is defined as the second oil channel, the internal through-hole portion of the outer one and the outer wall of the inner one form the first oil channel, and the first oil channel and the second oil channel are not directly connected.

[0016] Through such a setting, without increasing the space occupied by the overall structure, the space utilization rate of the connecting pipe is increased, so that it includes two oil channels that are not directly connected, which increases the flow path of the damping oil, prevents the damping effect from being obstructed, and also enables more convenient adjustment of the shock absorber force.

[0017] According to a preferred embodiment, a first oil guide hole and a second oil guide hole are provided in the air pressure cylinder cover, and one of the first oil channel and the second oil channel is connected to the first oil guide hole, and the other is connected to the second oil guide hole.

[0018] According to a preferred embodiment, it further includes an adjusting device for adjusting the flow rate of the damping oil, the adjusting device includes a first adjusting button and a second adjusting button, and the first adjusting button and the second adjusting button are respectively movably connected to the air pressure cylinder cover.

[0019] With such an arrangement, the first adjusting knob and the second adjusting knob can be rotated respectively to adjust the shock absorbing force of the oil pressure cylinder barrel in compression and expansion relative to the air pressure cylinder barrel.

[0020] According to a preferred embodiment, the first regulating button and the second regulating button have the same structure, and either the first regulating button or the second regulating button comprises an regulating member, and the regulating member at least partially protrudes from the air pressure cylinder cover.

[0021] This arrangement makes it easier for users to adjust the adjustment knob, reducing the difficulty of adjustment.

[0022] According to a preferred embodiment, either the first regulating button or the second regulating button further includes a return spring and a movable ball, one end of the return spring abuts against the regulating member, and the other end abuts against the regulating member or the inside of the air pressure cylinder cover.

[0023] According to a preferred embodiment, it further includes a floating oil cylinder, which is detachably connected to the air pressure cylinder cover and communicates with the oil pressure cylinder.

[0024] With this arrangement, when the hydraulic cylinder moves relative to the pneumatic cylinder, the floating oil cylinder can accommodate or supply damping oil to the hydraulic cylinder.

[0025] In a second aspect, the present invention further provides a unicycle comprising the bidirectional damping shock absorber as described above.

[0026] According to a preferred embodiment, the wheelbarrow includes a wheel assembly and a frame assembly, one end of the bidirectional damping shock absorber is directly or indirectly connected to the wheel assembly, and the other end is directly or indirectly connected to the frame assembly.

[0027] In summary, the bidirectional damping shock absorber and unicycle provided by the present invention have at least the following technical effects:

[0028] The wheelbarrow of the present invention includes a two-way damping shock absorber, the two ends of which are directly or indirectly connected to the wheel assembly and the frame assembly respectively, the two-way damping shock absorber includes a hydraulic cylinder, a pneumatic cylinder and a pneumatic cylinder cover, damping oil is provided in the hydraulic cylinder, the pneumatic cylinder is slidably connected to the hydraulic cylinder, the pneumatic cylinder and the pneumatic cylinder cover are detachably connected, a connecting piece is provided in the pneumatic cylinder, one end of the connecting piece is fixedly connected to the pneumatic cylinder cover, and the other end is passed through the hydraulic cylinder, and a hydraulic piston is sleeved on the connecting piece at one end of the hydraulic cylinder, and the hydraulic piston is connected to the hydraulic cylinder The cylinders are arranged to slide relatively to each other, and a hydraulic cylinder cover is provided at one end of the hydraulic cylinder close to the pneumatic cylinder. The hydraulic cylinder cover is detachably connected to the hydraulic cylinder, and a connecting piece is passed through and slidably connected to the hydraulic cylinder cover. The hydraulic piston divides the hydraulic cylinder into a first oil chamber and a second oil chamber. The damping oil cannot flow directly between the first oil chamber and the second oil chamber, and can only flow from one of the first oil chamber and the second oil chamber into the other through the connecting piece, thereby realizing two-way circulation of the damping oil between the first oil chamber and the second oil chamber, increasing the buffering capacity, making the shock absorption effect better, and thus improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a three-dimensional structural diagram of the first embodiment of the present invention;

[0030] Figure 2 For example 1, it is different from Figure 1 Angle three-dimensional structure diagram;

[0031] Figure 3 For the Figure 1 Cross-section view in the AA direction;

[0032] Figure 4 For the Figure 2 Cross-section in the mid-CC direction;

[0033] Figure 5 for Figure 4 A magnified structural diagram of some components in the middle;

[0034] Figure 6 for Figure 3 Schematic diagram of the shock absorber transitioning to a compressed state;

[0035] Figure 7 For the Figure 1 Cross-section in the middle BB direction;

[0036] Figure 8 This is a three-dimensional structural diagram of the second embodiment of the present invention;

[0037] Figure 9 For the Figure 8 Cross-section in the middle DD direction;

[0038] Figure 10 for Figure 9 A magnified structural diagram of some components in the middle;

[0039] Figure 11 2 is a three-dimensional structural diagram of a unicycle according to an embodiment of the present invention.

[0040] The meanings of the reference numerals are as follows:

[0041] 1-Hydraulic cylinder; 11-Hydraulic cylinder cover; 111-First oil chamber; 112-Second oil chamber; 2-Hydraulic cylinder; 21-Connecting piece; 211-First oil pipe; 212-Second oil pipe; 213-First oil passage; 214-Second oil passage; 22-Hydraulic piston; 221-First oil chamber; 23-Fixing screw; 3-Hydraulic cylinder cover; 31-First oil guide hole; 32-Second oil guide hole; 33-Accommodation chamber; 34-Limiting block; 35 -oil unloading hole; 36-abutment block; 4-oil floating cylinder; 41-second air nozzle; 42-oil floating plug; 43-second air chamber; 44-third oil chamber; 5-adjusting device; 51-first adjusting button; 52-second adjusting button; 521-adjusting member; 5211-limiting protrusion; 5212-through hole; 5213-limiting groove; 522-reset spring; 523-movable ball; 524-adjusting screw; 6-first air nozzle; 7-limiting member.

[0042] 100-frame assembly; 200-wheel assembly. DETAILED DESCRIPTION

[0043] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0045] In the description of the present invention, unless otherwise expressly specified or limited, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more; and the term "and / or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" or "an" object is also intended to mean one of a possible plurality of such objects.

[0046] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0047] Furthermore, in the description of the present invention, it should be understood that the directional words such as "upper", "lower", "inner", and "outer" mentioned are described based on the angles shown in the accompanying drawings and should not be understood as limiting the specific embodiments. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", or "inner", "outer", but also indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0048] Example 1

[0049] See Figure 1 and Figure 2 An embodiment of the present invention discloses a bidirectional damping shock absorber, comprising a hydraulic cylinder 1, a pneumatic cylinder 2 and a pneumatic cylinder cover 3, wherein the hydraulic cylinder 1 and the pneumatic cylinder cover 3 are respectively arranged on both sides of the pneumatic cylinder 2, damping oil is provided in the hydraulic cylinder 1, the pneumatic cylinder 2 is slidingly connected to the hydraulic cylinder 1, and the pneumatic cylinder 2 and the pneumatic cylinder cover 3 are detachably connected. The shock absorber in this embodiment also includes a floating oil cylinder 4, which is fixedly connected to the pneumatic cylinder cover 3. During the movement of the hydraulic cylinder 1 relative to the pneumatic cylinder 2, the floating oil cylinder 4 can accommodate or supply damping oil to the hydraulic cylinder 1, and the angle formed by the axis of the floating oil cylinder 4 and the sliding direction of the hydraulic cylinder 1 relative to the pneumatic cylinder 2 is greater than 90°.

[0050] For details, please refer to Figure 3 and Figure 6 The oil pump 22 is connected with the oil pump 21 in the oil pumping station 1, and the oil pump 22 is connected with the oil pump 21 in the oil pumping station 1.

[0051] In this embodiment, the area formed by the hydraulic cylinder 1 and the upper part of the hydraulic piston 22 is defined as the first oil chamber 221, the area formed by the lower part of the hydraulic cylinder 1 and the hydraulic piston 22, and the upper part of the hydraulic cylinder cover 11 is defined as the second oil chamber 112, and the connecting piece 21 includes a first oil pipe 211 and a second oil pipe 212. The first oil pipe 211 and the second oil pipe 212 are both configured to be through, and one of the first oil pipe 211 and the second oil pipe 212 is sleeved on the other. In this way, the space utilization rate of the connecting pipe is increased without increasing the space occupied by the overall structure, so that the interior of the connecting pipe includes two oil passages that are not directly connected. , increasing the flow path of the damping oil, preventing the damping effect from being obstructed, and also realizing more convenient adjustment of the shock absorption force; in this embodiment, the one located on the outside is defined as the first oil pipe 211, and the one located on the inside is defined as the second oil pipe 212, the internal through-hole portion of the first oil pipe 211 and the outer wall of the second oil pipe 212 form a first oil channel 213, the internal through-hole portion of the second oil pipe 212 is the second oil channel 214, the first oil chamber 221 is connected to the second oil channel 214, and the second oil chamber 112 is connected to the first oil channel 213, and the damping oil realizes the switching between the first oil channel 213 and the second oil channel 214 in the air pressure cylinder cover 3.

[0052] As a preferred embodiment, Figure 3 In the figure, a fixing screw 23 is provided on the upper side of the hydraulic piston 22, and the fixing screw 23 is used to locate the position of the first oil pipe 211 and the second oil pipe 212 to prevent the hydraulic cylinder cover 11 from driving the connecting piece 21 to move when the hydraulic cylinder 1 moves relative to the pneumatic cylinder 2, thereby causing the position of the first oil pipe 211 and the second oil pipe 212 to be offset.

[0053] Furthermore, a first air nozzle 6 is provided on the pneumatic cylinder cover 3, and the first air nozzle 6 connects the atmosphere and the pneumatic cylinder 2. The inner wall of the pneumatic cylinder 2 and the lower part of the oil pressure cylinder cover 11 form a first air chamber 111. The air pressure of the first air chamber 111 can make the damping oil flow smoothly in the first oil chamber 221 and the second oil chamber 112 and maintain a relatively stable state.

[0054] Please also refer to Figure 4 、 Figure 5 and Figure 7 , an adjusting device 5 is provided on the air pressure cylinder cover 3 for adjusting the flow of the damping oil in the air pressure cylinder cover 3. The change in the flow rate causes the magnitude of the damping force to change, thereby changing the shock absorption effect to meet the needs of different terrains or different users. The adjusting device 5 includes two adjusting buttons with the same structure, one of which is defined as a first adjusting button 51 and the other as a second adjusting button 52. The first adjusting button 51 and the second adjusting button 52 are respectively movably connected to the air pressure cylinder cover 3, as shown in FIG. Figure 7As shown, the air pressure cylinder cover 3 is provided with a first oil guide hole 31 and a second oil guide hole 32. One of the first oil passage 213 and the second oil passage 214 is connected to the first oil guide hole 31, and the other is connected to the second oil guide hole 32. In this embodiment, the first oil passage 213 is connected to the first oil guide hole 31, and the second oil passage 214 is connected to the second oil guide hole 32. Figure 4 and Figure 5 As shown, the air cylinder cover 3 is provided with two accommodating cavities 33, and the first adjusting button 51 and the second adjusting button 52 are movably arranged in one accommodating cavity 33 respectively. The first adjusting button 51 and the second adjusting button 52 are installed in the same manner in the accommodating cavity 33. To more clearly illustrate the structure of the adjusting button, Figure 4 The first adjusting button 51 is hidden in the middle, and the second adjusting button 52 includes an adjusting member 521, an adjusting screw 524, a return spring 522 and a movable ball 523. A limiting groove 5213 is provided on the radial upper ring of the adjusting member 521. A limiting member 7 is provided in the air pressure cylinder cover 3. The limiting member 7 abuts against the limiting groove 5213 and is used to limit the position of the second adjusting button 52 in the accommodating cavity 33 to prevent it from falling off the air pressure cylinder cover 3. The adjusting screw 524 is threadedly connected to the adjusting member 521. The return spring 522 is arranged inside the limiting member 7, one end of which is fixedly connected to the adjusting screw 524, and the other end is fixedly connected to the movable ball 523. The return spring 522 is in a compressed state, and the movable ball 523 is also arranged inside the limiting member 7. A limiting protrusion 5211 is provided on the limiting member 7. The movable ball 523 is pushed to the limiting protrusion 5211 by the return spring 522, and the movable ball 523 is at least partially The limit member 521 is protruded from the limit member 7, and the limit member 7 is also provided with a through hole 5212. When the damping oil flows from the second oil channel 214 to the first oil channel 213, the damping oil first flows from the second oil channel 214 into the second oil guide hole 32, and then enters the interior of the second adjusting button 52 through the through hole 5212. Since the air pressure cylinder cover 3 is provided with an abutment block 36, the position of the adjusting member 521 in the accommodating chamber 33 is changed by rotating the adjusting member 521, but the range of movement will not exceed the limit position positioned by the limit groove 5213 and the limit protrusion 5211. The movable ball 523 abuts against the abutment block 36, so that a gap is formed between the limit protrusion 5211 and the movable ball 523. The damping oil in the adjusting member 521 flows through the gap into the oil unloading hole 35, and then partially flows into the first adjusting button 51 through the oil unloading hole 35, and partially flows into the floating oil cylinder 4, and finally flows into the first oil channel 213.

[0055] It can be understood that when the adjusting screw 524 is rotated, the force applied by the adjusting screw 524 to the return spring 522 changes, and the force applied by the return spring 522 to the movable ball 523 also changes, so that when the movable ball 523 is pushed by the abutment block 36, the size of the gap between the limiting protrusion 5211 and the movable ball 523 changes, that is, the flow rate changes, and the flow rate of the damping oil also changes, thereby realizing the adjustment of the damping size. The first adjusting button 51 and the second adjusting button 52 have the same structure and function, that is, they can respectively adjust the damping rate of the damping oil flowing from one of the first oil chamber 221 and the second oil chamber 112 to the other, thereby realizing the separate adjustment of the compression and extension forces. Since there are more passages in the air pressure cylinder cover 3 and the connecting piece 21, there are more circulation paths for the damping oil, which prevents the damping effect from being blocked and can also better adjust the shock absorption force of the adjusting button.

[0056] More specifically, when the bidirectional damping shock absorber in this embodiment is Figure 3 Towards Figure 6 When the state of the hydraulic cylinder 1 changes, that is, when it changes from relaxation to compression, the hydraulic cylinder 1 moves downward relative to the pneumatic cylinder 2, and the damping oil in the first oil chamber 221 enters the second oil guide hole 32 through the second oil channel 214 (second oil pipe 212), and then passes through the second adjusting button 52 and the first adjusting button 51, flows into the first oil guide hole 31 and the first oil channel 213, and enters the second oil chamber 112. The pressure of the hydraulic cylinder 1 gradually balances with the pressure of the first air chamber 111, and then the two-way damping shock absorber changes from the compression state to the relaxation state, and the flow direction of the damping oil flows in the opposite direction to the above. During the state change process, the floating oil cylinder 4 can accommodate or supply damping oil to the hydraulic cylinder 1.

[0057] The oil float cylinder 4 includes a second air nozzle 41 and an oil float plug 42. The second air nozzle 41 is connected to the atmosphere. A second air chamber 43 is formed between the second air nozzle 41 and the oil float plug 42. The other side of the oil float plug 42 is a third oil chamber 44. The state changes between the second air chamber 43 and the third oil chamber 44 are similar to the state changes of the above-mentioned first air chamber 111 and the first oil chamber 221 and the second oil chamber 112, and no additional details are given here.

[0058] When passing through bumpy roads or braking, the shock absorber in this embodiment will continue to compress and relax repeatedly for a period of time, which can absorb vibration energy. Since the damping oil can flow in both directions between the first oil chamber 221 and the second oil chamber 112, the buffering capacity is further increased, making the shock absorption effect better, thereby enhancing the user experience.

[0059] Example 2

[0060] This embodiment is another implementation based on the first embodiment, which is an improvement of the first embodiment, and the repeated parts will not be further described.

[0061] Please also refer to Figure 8 and Figure 9 In this embodiment, the axis of the floating oil cylinder 4 is parallel to the direction in which the oil cylinder 1 slides relative to the pneumatic cylinder 2. With this arrangement, when the bidirectional damping shock absorber provided in this embodiment is installed on a unicycle, bicycle or other means of transport, and passes through a bumpy road or brakes, the oil cylinder 1 and the pneumatic cylinder 2 are repeatedly stretched and compressed, and the floating oil cylinder 4 will not move in a direction deviating from the axis, thereby preventing the floating oil cylinder 4 from colliding with other components of the vehicle body and enhancing movement stability.

[0062] Further, please also refer to Figure 10 Since the structures and working principles of the first adjusting button 51 and the second adjusting button 52 are the same, in this embodiment, the second adjusting button 52 is taken as an example to explain its structure and the damping oil circulation sequence. In this embodiment, the second adjusting button 52 includes an adjusting member 521, a return spring 522 and a movable ball 523. The movable ball 523 is arranged on the outside of the adjusting member 521, and the return spring 522 is arranged in the accommodating cavity 33 of the air pressure cylinder cover 3. One end of the return spring 522 is fixedly connected to the inner wall of the air pressure cylinder cover 3, and the other end abuts against the movable ball 523. A limiting protrusion 5211 is provided on the adjusting member 521. The maximum diameter of the opening of the limiting protrusion 5211 is smaller than the diameter of the movable ball 523. The accommodating cavity 33 A limit block 34 is provided. When the adjusting button is located in the accommodating chamber 33, the flow direction of the damping oil is the same as the pressure of the return spring 522 on the movable ball 523, and the damping oil cannot bypass the movable ball 523 and enter the opening of the limit protrusion 5211. However, there is a gap between the limit block 34 and the limit protrusion 5211, through which the damping oil can flow into the through hole 5212 and then into the oil unloading hole 35. When it flows into the other adjusting button, when the oil pressure of the damping oil is greater than the elastic force of the return spring 522, the movable ball 523 can be pushed open. The structure and working principle of the first adjusting button 51 are the same, and the damping oil is switched between the first oil passage 213 and the second oil passage 214. That is, the adjusting button acts as a one-way valve.

[0063] It can be understood that when the user adjusts the adjustment button to adjust the shock absorption force of the shock absorber, the first adjustment button 51 and / or the second adjustment button 52 are directly turned, and the length of the first adjustment button 51 and the second adjustment button 52 protruding from the accommodating cavity 33 changes, resulting in a change in the size of the gap between the limit block 34 and the limit protrusion 5211, and adjusting the flow rate of the damping oil in the air cylinder cover 3. The change in the flow rate causes the magnitude of the damping force to change, thereby changing the shock absorption effect to meet the needs of different terrains or different users.

[0064] Compared with Example 1, Figure 9As shown, in this embodiment, the axes of the damping oil flow channels in the pneumatic cylinder cover 3 are all in the same plane, which is convenient for punching, the required process is simple, and it is convenient for mass production; and the first adjusting button 51 and the second adjusting button 52 are protruding from the pneumatic cylinder cover 3, facing away from the oil hydraulic cylinder 1 and the floating oil cylinder 4, and the adjustment method is simpler, without the need for a screwdriver, and the user only needs to manually tighten to adjust the damping force, which is convenient to operate and improves the user experience.

[0065] On the other hand, the present invention also provides a wheelbarrow, such as Figure 11 As shown, the unicycle includes a wheel assembly 200 and a frame assembly 100. One end of the bidirectional damping shock absorber of embodiment 1 or embodiment 2 is directly or indirectly connected to the wheel assembly 200, and the other end is directly or indirectly connected to the frame assembly 100, so that the unicycle has a good shock absorption effect and can be adjusted in both directions.

[0066] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A bidirectional damping shock absorber, characterized in that: include: A hydraulic cylinder (1), wherein damping oil is provided in the hydraulic cylinder (1); A pneumatic cylinder (2), wherein the pneumatic cylinder (2) is slidably connected to the oil pressure cylinder (1); A pneumatic cylinder cover (3), wherein the pneumatic cylinder cover (3) is detachably connected to the pneumatic cylinder (2); A connecting piece (21) is provided in the pneumatic cylinder (2), one end of the connecting piece (21) is fixedly connected to the pneumatic cylinder cover (3), and the other end is passed through the oil-pressure cylinder (1), and an oil-pressure piston (22) is sleeved on the connecting piece (21) at one end in the oil-pressure cylinder (1), and the oil-pressure piston (22) and the oil-pressure cylinder (1) are arranged to slide relative to each other; The hydraulic cylinder (1) is provided with a hydraulic cylinder cover (11) at one end close to the pneumatic cylinder (2), and the hydraulic cylinder cover (11) is detachably connected to the hydraulic cylinder (1), and the connecting piece (21) is passed through and slidably connected to the hydraulic cylinder cover (11); The oil pressure piston (22) divides the oil pressure cylinder (1) into a first oil chamber (221) and a second oil chamber (112), and the damping oil flows from one of the first oil chamber (221) and the second oil chamber (112) into the other through the connecting piece (21); The connecting member (21) includes a first oil pipe (211) and a second oil pipe (212), wherein the first oil pipe (211) and the second oil pipe (212) are both configured to be through-connected, and one of the first oil pipe (211) and the second oil pipe (212) is sleeved on the other. The inner through-hole portion of one of the first oil pipe (211) and the second oil pipe (212) located on the inner side is defined as a second oil passage (214), the inner through-hole portion of the one located on the outer side and the outer wall of the one located on the inner side form a first oil passage (213), and the first oil passage (213) and the second oil passage (214) are not directly connected; A first oil guide hole (31) and a second oil guide hole (32) are provided in the air pressure cylinder cover (3); one of the first oil passage (213) and the second oil passage (214) is connected to the first oil guide hole (31), and the other is connected to the second oil guide hole (32); The pneumatic cylinder cover (3) is provided with an adjusting device (5), and the adjusting device (5) is used to adjust the flow rate of the damping oil; when the bidirectional damping shock absorber changes from relaxation to compression, the oil pressure cylinder (1) moves downward relative to the pneumatic cylinder (2), and the damping oil in the first oil chamber (221) enters the second oil guide hole (32) through the second oil passage (214), and then passes through the adjusting device (5), flows into the first oil guide hole (31), the first oil passage (213), and enters the second oil chamber (112).

2. A bidirectional damping shock absorber according to claim 1, characterized in that: It also includes an adjusting device (5) for adjusting the flow of the damping oil, wherein the adjusting device (5) includes a first adjusting button (51) and a second adjusting button (52), and the first adjusting button (51) and the second adjusting button (52) are respectively movably connected to the air pressure cylinder cover (3).

3. The bidirectional damping shock absorber according to claim 2, characterized in that: The first regulating button (51) and the second regulating button (52) have the same structure. Either the first regulating button (51) or the second regulating button (52) comprises an regulating member (521), and the regulating member (521) at least partially protrudes from the air pressure cylinder cover (3).

4. A bidirectional damping shock absorber according to claim 3, characterized in that: Either the first regulating button (51) or the second regulating button (52) further comprises a return spring (522) and a movable ball (523), one end of the return spring (522) abuts against the regulating member (521), and the other end abuts against the regulating member (521) or the inside of the air cylinder cover (3).

5. The bidirectional damping shock absorber according to claim 1, characterized in that: It also includes a floating oil cylinder (4), which is detachably connected to the air pressure cylinder cover (3) and communicates with the oil pressure cylinder (1).

6. A wheelbarrow, characterized in that: It comprises a bidirectional damping shock absorber as described in any one of claims 1 to 5.

7. A wheelbarrow according to claim 6, characterized in that: The wheelbarrow comprises a wheel assembly (200) and a frame assembly (100); one end of the bidirectional damping shock absorber is directly or indirectly connected to the wheel assembly (200), and the other end is directly or indirectly connected to the frame assembly (100).

Images