Bidirectional shock absorber and monocycle

Abstract

The utility model relates to a bidirectional shock absorber and a monocycle. The bidirectional shock absorber comprises a main body pipe, a piston rod and a first elastic piece, wherein a first guide seat and a second guide seat are arranged at the two ends of the main body pipe respectively; the piston rod is arranged in the main body pipe in a sliding manner; the first elastic piece is arranged in the main body pipe, a limiting block is arranged at the end, facing the first guide seat, of the piston rod, one end of the first elastic piece abuts against the limiting block, and the other end of the first elastic piece abuts against the bottom of the main body pipe; or the first elastic piece is located outside the main body pipe, a limiting block is arranged at the upper end of the piston rod, and the first elastic piece is arranged between the top of the first guide seat and the bottom of the limiting block in an abutting mode; according to the shock absorber, the shock absorption effect of the shock absorber is effectively improved, it is ensured that a user has good use experience on a bumpy road surface, the structure of the shock absorber is more compact, the overall rigidity of the shock absorption module is higher, and the swing amount is smaller.

Description

Technical Field

[0001] The utility model belongs to the technical field of shock absorbers, and particularly relates to a two-way shock absorber and a unicycle. Background Art

[0002] A damping shock absorber is a kind of shock absorber with better shock absorption effect, which is used to suppress the oscillation when the spring rebounds after absorbing shock and the impact from the road surface. The existing damping shock absorber generally includes a piston rod and a piston cylinder. The piston rod is slidably inserted into the piston cylinder. Damping oil is accommodated between the bottom end of the piston rod and the inside of the piston cylinder, so that the piston rod slides in the piston cylinder for buffering during shock absorption.

[0003] However, for the existing shock absorber, the bottom end of the piston rod is located inside the piston cylinder, and the shock absorption stroke is short. When encountering a road surface with large bumps, the shock absorption effect of the shock absorber is limited, and it is easy to cause discomfort and bumps to the user. In addition, when the shock absorber is applied to a unicycle, the spring supporting the existing shock absorber is sleeved outside the shock absorber. The spring is easy to attach with dirt, which affects its deformation performance. And the external spring makes the overall space occupied by the shock absorber larger, which is not conducive to optimizing the layout design of the unicycle. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a two-way shock absorber and a unicycle to solve the problems that the existing shock absorber has a short shock absorption stroke, and when encountering a road surface with large bumps, the shock absorption effect of the shock absorber is limited, which is easy to cause discomfort and bumps to the user; and the external spring is not conducive to optimizing the layout design of the unicycle.

[0005] One solution of the utility model provides a two-way shock absorber, which includes a main body tube, a piston rod and a first elastic member:

[0006] The two ends of the main body tube are respectively provided with a first guide seat and a second guide seat;

[0007] The piston rod is slidably arranged in the main body tube, and the two ends of the piston rod respectively penetrate through the first guide seat and the second guide seat;

[0008] The first elastic member is arranged in the main body tube. A limiting block is arranged at one end of the piston rod facing the first guide seat. One end of the first elastic member abuts against the limiting block, and the other end of the first elastic member abuts against the bottom of the main body tube;

[0009] Alternatively, the first elastic member is located outside the main body tube. A limiting block is arranged at the upper end of the piston rod. The first elastic member abuts between the top of the first guide seat and the bottom of the limiting block.

[0010] In this solution, the piston rod is slidably arranged inside the main pipe, and both ends of the piston rod penetrate through the first guide seat and the second guide seat respectively, so that the shock absorption stroke of the piston rod is longer than that of the existing solution, improving the shock absorption effect of the shock absorber. On bumpy roads, it can also ensure a good user experience for the user. Moreover, the structure of the shock absorber is more compact, the overall rigidity of the shock absorption module is stronger, and the swing amount is smaller;

[0011] In addition, by arranging the first elastic member inside the main pipe and sleeving the main pipe and the piston rod, both ends of the first elastic member respectively abut against the limit block on the piston rod and the bottom of the main pipe, making the structure of the shock absorber more compact, which is beneficial to the layout design of the unicycle, making the appearance of the vehicle more tidy and improving the overall aesthetic degree of the vehicle; and the way of arranging the elastic member inside reduces the direct action of external factors on the first elastic member, such as sediment, moisture, etc., which helps to extend the service life of the elastic member. At the same time, due to the close combination of the shock absorber and the elastic member, it can respond to road surface changes faster.

[0012] In one of the solutions, the two-way shock absorber further includes a working cylinder and a piston. The working cylinder is arranged at the bottom of the main pipe, and the piston is connected to the piston rod. The piston forms a first piston chamber and a second piston chamber inside the working cylinder;

[0013] A third guide seat is arranged at the top of the working cylinder, and the piston rod penetrates through the third guide seat.

[0014] In this solution, by arranging a third guide seat at the top of the working cylinder, the piston rod and the working cylinder are kept coaxial. When a vehicle equipped with the shock absorber of this solution encounters a bumpy section, the piston rod drives the piston inside the working cylinder to move upward. The space of the first piston chamber is compressed, and the space of the second piston chamber expands, so that the hydraulic oil in the first piston chamber flows to the second piston chamber. At the same time, the first elastic member generates a compressive deformation, accumulating part of the impact force inside the first elastic member. It can be understood that during the process of the piston rod being impacted and moving, part of the impact force is converted into heat energy during the process of the hydraulic oil flowing from the first piston chamber to the second piston chamber, and the remaining impact force is absorbed and accumulated by the first elastic member; and when the first elastic member relaxes and releases the accumulated impact force, the space of the first piston chamber expands and the space of the second piston chamber is compressed. During the process of the hydraulic oil flowing from the second piston chamber to the first piston chamber, part of the impact force released by the first elastic member is also converted into heat energy and is transferred to the outside through the working cylinder and the main pipe, thereby reducing the uncomfortable bumpy feeling caused to the user by the bumpy section.

[0015] In one solution, the bi-directional shock absorber further includes an oil storage cylinder barrel, which is arranged at the bottom of the main pipe, and the oil storage cylinder barrel is sleeved outside the working cylinder barrel; a plurality of first through holes are arranged at the bottom of the second piston chamber and communicated with the oil storage cylinder barrel;

[0016] A first stop block is arranged at the top of the oil storage cylinder barrel, and the first elastic member is abutted and arranged on the first stop block;

[0017] And / or, a second elastic member is further arranged in the first piston chamber, one end of the second elastic member abuts against the piston, and the other end of the second elastic member abuts against the third guide seat.

[0018] In this solution, by arranging the oil storage cylinder barrel outside the working cylinder barrel, when the piston rod moves downward, the hydraulic oil in the second piston chamber not only flows into the first piston chamber, but also flows into the oil storage cylinder barrel through a plurality of first through holes. It can be understood that when the hydraulic oil circulates between the second piston chamber and the oil storage cylinder barrel, the impact force will be converted into heat energy, thereby improving the shock absorption effect of the shock absorber;

[0019] Moreover, by arranging the second elastic member in the first piston chamber, when the piston moves up and down, the process of absorbing and releasing the impact force by the second elastic member is synchronized with the first elastic member, further improving the absorption effect on the impact force.

[0020] In one solution, a second through hole is arranged on the outer wall of the oil storage cylinder barrel, and the oil storage cylinder barrel is communicated with the main pipe through the second through hole;

[0021] And / or, a first damping valve is arranged on the outer wall of the oil storage cylinder barrel, and the oil storage cylinder barrel is communicated with the main pipe through the first damping valve.

[0022] In one solution, the piston rod includes a first piston shaft, a second piston shaft and a connecting block arranged coaxially. The first piston shaft is fixedly connected with the second piston shaft through the connecting block, and the connecting block is located in the first piston chamber;

[0023] A hydraulic oil pipeline is formed by internal communication among the first piston shaft, the connecting block and the second piston shaft, and the hydraulic oil pipeline communicates the first piston chamber and the second piston chamber;

[0024] A second damping valve is arranged on the pipeline formed by the second piston shaft and the connecting block.

[0025] In this solution, the first damping valve and the second damping valve form the damping force of the shock absorber. By restricting the flow rate of the hydraulic oil passing through them, the first damping valve and the second damping valve cause the hydraulic oil molecules to rub against each other or the hydraulic oil to rub against the damping valve, converting the heat energy carried by the flowing hydraulic oil into heat energy, reducing the impact and vibration caused by uneven road surfaces of the shock absorber, thereby providing a smoother driving experience for the vehicle equipped with the shock absorber and improving driving safety.

[0026] In one of the solutions, the first piston shaft is provided with a second stop block, and the second stop block is located between the third guide seat and the connecting block for limiting the moving stroke of the first piston shaft.

[0027] And / or, a third through hole is provided at the end of the second piston shaft close to the piston, and the third through hole communicates with the hydraulic oil pipeline.

[0028] In one of the solutions, a main shaft valve core is arranged inside the first piston shaft, and the main shaft valve, the first piston shaft and the connecting block form a third damping valve. The main shaft valve core is used to adjust the damping effect of the third damping valve.

[0029] A third elastic member is arranged between the main shaft valve core and the connecting block, and the third elastic member is used to reset the main shaft valve core.

[0030] In this solution, an adjustable-position main shaft valve core is arranged inside the first piston shaft. The tapered end of the main shaft valve core corresponds to the channel opening at the top of the connecting block. When the relative position of the main shaft valve core is adjusted by the adjusting member, the tapered end is moved away from or closer to the channel opening at the top of the connecting block to adjust the damping force of the third damping valve. It can be understood that in this solution, the damping force of the third damping valve can be adjusted according to the driver's selection or automatically to adapt to different driving conditions and road surface conditions. And by providing the third elastic member, the main shaft valve core can return to its original position without external force.

[0031] In one of the solutions, at least one annular inner groove is provided on the inner circumferential surfaces of the first guide seat and the second guide seat, and a dynamic sealing element is arranged in the annular inner groove and abuts against the piston rod.

[0032] And / or, at least one annular outer groove is provided on the outer circumferential surfaces of the first guide seat and the second guide seat, and a static sealing element is arranged in the annular outer groove and abuts against the main body pipe.

[0033] In one of the solutions, first mounting blocks are respectively arranged at both ends of the main body pipe, and the first mounting blocks are symmetrically arranged along the central axis of the main body pipe.

[0034] Both ends of the piston rod are respectively provided with second mounting blocks, and the second mounting blocks are symmetrically arranged along the central axis of the piston rod.

[0035] In one of the solutions, a unicycle is further proposed, which includes a frame, a driving wheel and a bidirectional shock absorber. The bidirectional shock absorber is the bidirectional shock absorber in any one of the above-mentioned multiple solutions. Two bidirectional shock absorbers are symmetrically arranged on both sides of the driving wheel. The piston rod in the bidirectional shock absorber is connected to the frame, and the main body tube in the bidirectional shock absorber is connected to the driving wheel;

[0036] Among them, the connection of the main body tube in the bidirectional shock absorber to the driving wheel includes: the main body tube is directly connected to the driving wheel, or the main body tube is connected to the driving wheel by an intermediate member;

[0037] The unicycle further includes a battery compartment, and the battery compartment is arranged on the frame; the connection of the piston rod in the bidirectional shock absorber to the frame includes: the upper end of the piston rod is connected to the frame, the lower end of the piston rod is connected to the battery compartment, or both the upper end and the lower end of the piston rod are connected to the battery compartment.

[0038] In one of the solutions, a pedal is further included, and the pedal is arranged on the battery compartment or the frame. Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0040] Figure 1 It shows the structural schematic diagram of the bidirectional shock absorber of the present invention;

[0041] Figure 2 It shows the exploded structure schematic diagram of the bidirectional shock absorber of the present invention;

[0042] Figure 3 It shows the structural schematic diagram of the piston rod of the present invention cooperating with the first elastic member and the working cylinder;

[0043] Figure 4 It shows along Figure 3 The sectional structural schematic diagram in the A-A direction in;

[0044] Figure 5 It shows Figure 4 The enlarged structural schematic diagram at A1 in;

[0045] Figure 6 Indicates Figure 4 The enlarged structural schematic diagram at A2 in

[0046] Figure 7 The structural schematic diagram of another perspective of the piston rod, the first elastic member, and the working cylinder barrel of the present utility model;

[0047] Figure 8 Indicates along Figure 7 The sectional structural schematic diagram in the B-B direction in

[0048] Figure 9 Indicates Figure 8 The enlarged structural schematic diagram at B1 in

[0049] Figure 10 Indicates Figure 8 The enlarged structural schematic diagram at B2 in

[0050] Figure 11 The structural schematic diagram of the unicycle of Embodiment 1 of the present utility model;

[0051] Figure 12 The structural schematic diagram of the connection of the two-way shock absorber in the unicycle of the present utility model;

[0052] Figure 13 The structural schematic diagram of the two-way shock absorber of another embodiment of the present utility model;

[0053] Figure 14 The structural schematic diagram in the present utility model where the upper end of the piston rod is connected to the frame, the lower end of the piston rod is connected to the battery compartment, and the battery compartment is connected to the pedal;

[0054] Figure 15 The structural schematic diagram in the present utility model where both the upper and lower ends of the piston rod are connected to the battery compartment, and the battery compartment is connected to the pedal;

[0055] Figure 16 The structural schematic diagram of the unicycle of Embodiment 2 of the present utility model;

[0056] Figure 17 The structural schematic diagram of the unicycle of Embodiment 4 of the present utility model;

[0057] Figure 18 The structural schematic diagram of the unicycle of Embodiment 5 of the present utility model.

[0058] The description of the reference numerals is as follows:

[0059] 1 - Main body pipe; 101 - First guide seat; 102 - Second guide seat; 103 - First mounting block; 2 - Piston rod; 21 - Limit block; 201 - First piston shaft; 202 - Second piston shaft; 203 - Connecting block; 204 - Second stop block; 205 - Third through hole; 206 - Second mounting block; 207 - Damping adjustment block; 3 - First elastic member; 4 - Working cylinder barrel; 401 - First piston chamber; 402 - Second piston chamber; 403 - Third guide seat; 404 - First through hole; 405 - Second elastic member; 5 - Piston; 6 - Oil storage cylinder barrel; 601 - First stop block; 602 - Second through hole; 7 - Main shaft valve core; 701 - Third elastic member; 8 - Dynamic sealing element; 9 - Static sealing element; 10 - Frame; 11 - Driving wheel; 12 - Battery compartment; 13 - Pedal. Detailed implementation mode

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0061] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0062] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0063] The elastic member is used to reduce vibration and impact. Depending on different usage scenarios, leaf springs, springs, plastic springs, elastic supports, air springs, etc. can be adopted; in this specific embodiment, the first elastic member, the second elastic member, and the third elastic member are springs.

[0064] Embodiment 1

[0065] Please refer to Figure 1 and Figure 2 , in one of the embodiments, a two-way shock absorber is provided, which includes a main body tube 1, a piston rod 2, and a first elastic member 3:

[0066] First guide seats 101 and second guide seats 102 are respectively arranged at both ends of the main body tube 1;

[0067] The piston rod 2 is slidably arranged in the main body tube 1, and both ends of the piston rod 2 respectively penetrate through the first guide seat 101 and the second guide seat 102;

[0068] The first elastic member 3 is arranged in the main body tube 1. A limit block 21 is arranged at one end of the piston rod 2 facing the first guide seat 101. One end of the first elastic member 3 abuts against the limit block 21, and the other end of the first elastic member 3 abuts against the bottom of the main body tube 1.

[0069] In this solution, both ends of the piston rod 2 respectively penetrate through the first guide seat 101 and the second guide seat 102, and the piston rod 2 is slidably arranged in the main body tube 1, so that the shock absorption stroke of the piston rod 2 is longer than that of the existing solution, improving the shock absorption effect of the shock absorber. Even on a bumpy road surface, a better user experience can be ensured for the user. Moreover, the structure of the shock absorber is more compact, the overall rigidity of the shock absorption module is stronger, and the swing amount is smaller;

[0070] In addition, by arranging the first elastic member 3 in the main body tube 1 and sleeving the main body tube 1 and the piston rod 2, and making both ends of the first elastic member 3 respectively abut against the limit block 21 on the piston rod 2 and the bottom of the main body tube 1, the structure of the shock absorber is more compact, which is beneficial to the layout design of the unicycle, making the appearance of the vehicle more tidy and improving the overall aesthetic degree of the vehicle; and the method of arranging the elastic member inside reduces the direct action of external factors on the first elastic member 3, such as sediment, moisture, etc., which helps to extend the service life of the elastic member. At the same time, due to the close combination of the shock absorber and the elastic member, the shock absorber can respond to road surface changes faster.

[0071] It should be noted that both the first guide seat 101 and the second guide seat 102 have guide holes, and the guide holes on the first guide seat 101 and the second guide seat 102 are on the same axis, which is used to ensure that the piston rod 2 slidably arranged in the guide holes of the first guide seat 101 and the second guide seat 102 is coaxial with the main body tube 1, so that the direction of the piston rod 2 remains unchanged during the up and down sliding process.

[0072] When the two-way shock absorber passes through a bumpy road section, the piston rod 2 can slide relative to the main body tube 1 in the direction of the first guide seat 101 or the second guide seat 102. The two-way shock absorber has a larger sliding stroke compared to the one-way shock absorber with one end restricted in the piston cylinder.

[0073] Moreover, by arranging a limit block 21 on the piston rod 22, the limit block 21 will contact and limit with the first guide seat 101 arranged at the top of the main body tube 1 after the piston rod 2 moves up to the limit. This not only realizes the limitation of the maximum sliding stroke of the piston rod 2, but also can arrange a first elastic member 3 inside the main body tube 1 through the limit block 21. The first elastic member 3 is used to accumulate and delay the release of the impact force. At the same time, the first elastic member 3 directly transmits power to the piston rod 2 also inside the main body tube 1, better realizing the reset of the piston rod 2.

[0074] Please refer to Figures 3 - 6 , in one of the embodiments, the two-way shock absorber further includes a working cylinder 4 and a piston 5. The working cylinder 4 is arranged at the bottom of the main body tube 1. The piston 5 is connected to the piston rod 2. The piston 5 forms a first piston chamber 401 and a second piston chamber 402 in the working cylinder 4;

[0075] A third guide seat 403 is arranged at the top of the working cylinder 4, and the piston rod 2 passes through the third guide seat 403.

[0076] In this solution, a third guide seat is provided at the top of the working cylinder 4, so that the piston rod 2 and the working cylinder 4 are kept coaxial. When a vehicle equipped with the shock absorber of this solution encounters a bumpy road section, the piston rod 2 drives the piston inside the working cylinder 4 to move upward. The space of the first piston chamber 401 is compressed, and the space of the second piston chamber 402 expands, so that the hydraulic oil in the first piston chamber 401 flows to the second piston chamber 402. At the same time, the first elastic member 3 generates a compressive deformation, and part of the impact force is accumulated inside the first elastic member 3. It can be understood that during the process of the piston rod 2 being impacted and moving, part of the impact force is converted into heat energy during the process of the hydraulic oil flowing from the first piston chamber 401 to the second piston chamber 402, and the remaining impact force is absorbed and accumulated by the first elastic member 3; and when the first elastic member 3 relaxes and releases the accumulated impact force, the space of the first piston chamber 401 expands and the space of the second piston chamber 402 is compressed. During the process of the hydraulic oil flowing from the second piston chamber 402 to the first piston chamber 401, part of the impact force released by the first elastic member 3 is also converted into heat energy and is transmitted to the outside through the working cylinder 4 and the main pipe 1, thereby reducing the uncomfortable bump feeling caused to the user by the bumpy road section.

[0077] Please refer to Figures 3 - 6 and Figure 10 In one embodiment, the bi-directional shock absorber further includes an oil storage cylinder 6. The oil storage cylinder 6 is disposed at the bottom of the main pipe 1 and the oil storage cylinder 6 is sleeved outside the working cylinder 4; a plurality of first through holes 404 are provided at the bottom of the second piston chamber 402 and are communicated with the oil storage cylinder 6;

[0078] A first stopper 601 is provided at the top of the oil storage cylinder 6, and the first elastic member 3 is abutted and disposed on the first stopper 601;

[0079] And / or, a second elastic member 405 is further disposed in the first piston chamber 401. One end of the second elastic member 405 abuts against the piston 5, and the other end of the second elastic member 405 abuts against the third guide seat 403.

[0080] In this embodiment, the oil storage cylinder 6 is sleeved outside the working cylinder 4, and the bottom of the oil storage cylinder 6 is pressed tightly on the annular plate at the bottom of the working cylinder 4; the oil storage cylinder 6 is threadedly connected through the external thread at its bottom and the internal thread of the second guide seat 102, and the annular plate at the bottom of the working cylinder 4 is clamped between the oil storage cylinder 6 and the second guide seat 102 to realize the coaxial fixation of the working cylinder 4 and the oil storage cylinder 6.

[0081] In this solution, by arranging an oil storage cylinder 6 outside the working cylinder, when the piston rod moves downward, the hydraulic oil in the second piston chamber 402 not only flows into the first piston chamber 401, but also flows into the oil storage cylinder 6 through a number of first through holes 404. It can be understood that when the hydraulic oil circulates between the second piston chamber 402 and the oil storage cylinder 6, the impact force will be converted into heat energy, thereby improving the shock absorption effect of the shock absorber;

[0082] Moreover, by arranging a second elastic member 405 in the first piston chamber 401, when the piston moves up and down, the process of absorbing and releasing the impact force by the second elastic member 405 is synchronized with the first elastic member 3, further improving the absorption effect on the impact force.

[0083] It can be understood that in this embodiment, the piston rod 2, the piston 5, the working cylinder 4 and the oil storage cylinder 6 form a double-cylinder shock absorption structure. When the wheel of the shock absorber in this embodiment encounters an uneven road surface, the piston moves up and down in the working cylinder 4, and this movement causes the hydraulic oil to flow between the working cylinder 4 and the oil storage cylinder 6; furthermore, there are inert gas and hydraulic oil inside the oil storage cylinder 6. When the hydraulic oil in the working cylinder 4 flows into the inside of the oil storage cylinder 6, the inert gas inside the oil storage cylinder 6 forms a gas cushion for assisting in absorbing shock and vibration; and, there is always hydraulic oil reserved at the bottom of the oil storage cylinder 6 to prevent the inert gas from entering the working cylinder.

[0084] In one embodiment, the piston 5 is provided with a damping valve for further improving the shock absorption effect of the shock absorber on the impact force.

[0085] In one embodiment, a second through hole 602 is provided on the outer wall of the oil storage cylinder 6, and the oil storage cylinder 6 is communicated with the main pipe 1 through the second through hole 602;

[0086] And / or, a first damping valve is provided on the outer wall of the oil storage cylinder 6, and the oil storage cylinder 6 is communicated with the main pipe 1 through the first damping valve.

[0087] It can be understood that in this embodiment, when the oil storage cylinder 6 is communicated with the main pipe 1, the bottom of the main pipe 1 and the oil storage cylinder 6 are both immersed in the hydraulic oil, and the inert gas fills the inside of the main pipe 1; on a bumpy road section, the gas cushion formed by the inert gas inside the main pipe 1 can achieve a better buffering and absorption effect; at the same time, the oil storage cylinder 6 is immersed in the hydraulic oil, and the oil storage cylinder 6 is communicated with the main pipe 1 through the first damping valve or a number of second through holes 602, more effectively preventing the inert gas from entering the inside of the working cylinder 4.

[0088] In one embodiment, the piston rod 2 includes a first piston shaft 201, a second piston shaft 202 and a connecting block 203 which are coaxially arranged. The first piston shaft 201 is fixedly connected to the second piston shaft 202 through the connecting block 203, and the connecting block 203 is located in the first piston chamber 401;

[0089] A hydraulic oil pipeline is formed inside the first piston shaft 201, the connecting block 203 and the second piston shaft 202, and the hydraulic oil pipeline communicates the first piston chamber 401 with the second piston chamber 402;

[0090] A second damping valve is arranged on the pipeline formed by the second piston shaft 202 and the connecting block 203.

[0091] In this solution, the first damping valve and the second damping valve form the damping force of the shock absorber. By restricting the flow rate of the hydraulic oil passing through them, the first damping valve and the second damping valve cause the hydraulic oil molecules to rub against each other or the hydraulic oil to rub against the damping valve, converting the heat energy carried by the flowing hydraulic oil into heat energy, reducing the impact and vibration caused by the uneven road surface of the shock absorber, thereby providing a smoother driving experience for the vehicle equipped with the shock absorber, and thus improving driving safety.

[0092] In one embodiment, the first piston shaft 201 is provided with a second stop block 204, and the second stop block 204 is located between the third guide seat 403 and the connecting block 203 for limiting the moving stroke of the first piston shaft 201;

[0093] And / or, a third through hole 205 is arranged at the end of the second piston shaft 202 close to the piston 5, and the third through hole 205 communicates with the hydraulic oil pipeline.

[0094] Please refer to Figures 4 - 6 , in one embodiment, a main shaft valve core 7 is arranged inside the first piston shaft 201. The main shaft valve core 7, the first piston shaft 201 and the connecting block 203 form a third damping valve, and the main shaft valve core 7 is used to adjust the damping effect of the third damping valve;

[0095] A third elastic member 701 is arranged between the main shaft valve core 7 and the connecting block 203, and the third elastic member 701 is used to reset the main shaft valve core 7.

[0096] In this solution, a main shaft valve core 7 with an adjustable position is arranged inside the first piston shaft 201. The conical end of the main shaft valve core 7 corresponds to the channel opening at the top of the connecting block 203. When the relative position of the main shaft valve core 7 is adjusted by an adjusting member, the conical end is moved away from or closer to the channel opening at the top of the connecting block 203 to adjust the damping force of the third damping valve. It can be understood that the damping force of the third damping valve can be adjusted according to the driver's selection or automatically to adapt to different driving conditions and road surface conditions. And by arranging a third elastic member 701, the main shaft valve core 7 can be restored to its original position without external force.

[0097] In an embodiment, a sliding channel is arranged along the axial direction of the first piston shaft 201. The main shaft valve core 7 is slidably arranged in the sliding channel. A damping adjustment block 207 is arranged at the end of the first piston shaft 201. The damping adjustment block 207 is arranged at the opening of the sliding channel with an adjustable position through a connecting thread. And the bottom of the damping adjustment block 207 abuts against the bottom of the main shaft valve core 7. The top of the damping adjustment block 207 is provided with a structure (such as a cross hole, a hexagonal hole, etc.) convenient for adjusting its relative position. The user only needs to borrow a screwdriver or a hexagonal wrench to adjust the relative position of the damping adjustment block 207, and then adjust the relative distance between the main shaft valve core 7 and the channel opening at the top of the connecting block 203, which is convenient for the user to adjust the damping force of the third damping valve to adapt to different road surface conditions or different users' usage habits.

[0098] In an application scenario of this embodiment, at least two seals are arranged between the main shaft valve core 7 and the sliding channel to prevent hydraulic oil from leaking from the sliding gap.

[0099] Please refer to Figures 8 - 10 , in one of the embodiments, at least one annular inner groove is arranged on the inner circumferential surfaces of the first guide seat 101 and the second guide seat 102. A dynamic sealing element 8 is arranged in the annular inner groove. The dynamic sealing element 8 abuts against the piston rod 2;

[0100] And / or, at least one annular outer groove is arranged on the outer circumferential surfaces of the first guide seat 101 and the second guide seat 102. A static sealing element 9 is arranged in the annular outer groove. The static sealing element 9 abuts against the main body pipe 1.

[0101] In this solution, the dynamic sealing element 8 is used to prevent axial leakage of hydraulic oil along the piston rod and also prevent pollutants from entering the interior of the main body pipe. The dynamic sealing element 8 can be an O-ring or an oil seal. And the static sealing element 9 is used to prevent leakage of hydraulic oil or inert gas in the main body pipe along the connection between the first guide seat 101 or the second guide seat 102 and the main body pipe. The static sealing element is an O-ring.

[0102] In one embodiment, first mounting blocks 103 are respectively arranged at two ends of the main body tube 1, and the first mounting blocks 103 are symmetrically arranged along the central axis of the main body tube 1;

[0103] Second mounting blocks 206 are respectively arranged at two ends of the piston rod 2.

[0104] In an application scenario of this embodiment, the first mounting blocks 103 symmetrically arranged along the central axis of the main body tube 1 are used to fixedly connect the main body tube 1 with the wheel; the second mounting blocks 206 arranged at two ends of the piston rod are used to connect the piston rod 2 with the vehicle frame; thus, when a vehicle equipped with the two-way shock absorber of this embodiment is driving on a bumpy road condition, after the wheel connected to the main body tube 1 is impacted and moves up and down or vibrates, the piston rod 2 in the main body tube 1 moves up and down relative to the main body tube 1, and the sliding stroke of the piston rod 2 is larger, increasing the absorption and conversion of the impact force by the shock absorber, reducing the impact force directly transmitted to the vehicle frame, and achieving a better shock absorption effect.

[0105] Embodiment 2

[0106] One embodiment provides a two-way shock absorber, including a main body tube 1, a piston rod 2 and a first elastic member 3:

[0107] First guide seats 101 and second guide seats 102 are respectively arranged at two ends of the main body tube 1;

[0108] The piston rod 2 is slidably arranged in the main body tube 1, and two ends of the piston rod 2 respectively penetrate through the first guide seat 101 and the second guide seat 102;

[0109] The first elastic member 3 is located outside the main body tube 1, a limit block 21 is arranged at the upper end of the piston rod 2, and the first elastic member 3 is abutted between the top of the first guide seat 101 and the bottom of the limit block 21.

[0110] In this embodiment, two ends of the piston rod 2 respectively penetrate through the first guide seat 101 and the second guide seat 102, and the piston rod 2 is slidably arranged in the main body tube 1, so that the shock absorption stroke of the piston rod 2 is longer than that of the existing solution, improving the shock absorption effect of the shock absorber, ensuring a better user experience for the user even on a road surface with large bumps, and the structure of the shock absorber is more compact, the overall rigidity of the shock absorption module is stronger, and the swing amount is smaller.

[0111] The limit block 21 is used to limit the upward sliding stroke of the main body tube 1, and at the same time, the limit block 21 serves as a fixed end point of the first elastic member 3, realizing that the first elastic member 3 absorbs the impact force transmitted during the sliding of the main body tube 1 through elastic deformation.

[0112] Embodiment 3

[0113] Please refer toFigure 10 , Figure 12 , in one embodiment, a unicycle is provided, which includes a frame, a driving wheel and a bidirectional shock absorber. The bidirectional shock absorber is the bidirectional shock absorber described in any one of the above-mentioned embodiments. Two bidirectional shock absorbers are symmetrically arranged on both sides of the driving wheel. The piston rod 2 in the bidirectional shock absorber is connected to the frame 10, and the main body tube 1 in the bidirectional shock absorber is connected to the driving wheel 11;

[0114] Wherein, the connection between the main body tube 1 in the bidirectional shock absorber and the driving wheel 11 includes: the main body tube 1 is directly connected to the driving wheel 11, or the main body tube 1 is connected to the driving wheel 11 by an intermediate member.

[0115] In one implementation scenario of this embodiment, when the diameter of the main body tube 1 is similar to the size of the motor shaft in the driving wheel 11 (which can use a hub motor), or the diameter of the motor shaft in the driving wheel 11 is larger than the diameter of the main body tube 1, the main body tube 1 can be directly fixedly connected to the motor shaft in the driving wheel 11 by installing a connecting member (such as a fixing bolt) on the main body tube 1, so as to make the structure of the unicycle more compact (not shown in this embodiment).

[0116] In another implementation scenario of this embodiment, when the diameter of the main body tube 1 is much larger than the diameter of the motor shaft in the driving wheel 11 (which can use a hub motor) (for example, the diameter of the motor shaft is only half or smaller than the diameter of the main body tube 1), in order to ensure that the main body tube 1 and the driving wheel 11 can be effectively fixed, an intermediate member is installed on the side of the main body tube 1 facing the driving wheel or at the end of the motor shaft facing the main body tube. The size of this intermediate member is at least similar to the diameter of the main body tube 1, and then the other side of the intermediate member is fixedly connected to the motor shaft or the main body tube 1. Among them, the intermediate member can adopt a connecting plate member (such as Figure 16 the rectangular block connected by the first connecting member 103 in

[0117] Embodiment 4

[0118] On the basis of Embodiments 1 and 3, the unicycle further includes a battery compartment 12 and a pedal 13. The pedal 13 is arranged on the battery compartment 12, and the battery compartment 12 is arranged on the frame 10;

[0119] The upper end of the piston rod 2 is connected to the frame 10, and the lower end of the piston rod 2 is connected to the battery compartment 12; a fixing hole is provided on the frame 10, and the upper end of the piston rod 2 is fixedly connected in the fixing hole; the lower end of the piston rod 2 is fixedly connected to the battery compartment 12 through the second mounting block 206;

[0120] The unicycle further includes a battery compartment 12, and the battery compartment 12 is arranged on the frame 10; the connection between the piston rod 2 of the bi-directional shock absorber and the frame 10 includes: the upper end of the piston rod 2 is connected to the frame 10, the lower end of the piston rod 2 is connected to the battery compartment 12, or both the upper end and the lower end of the piston rod 2 are connected to the battery compartment 12.

[0121] In this embodiment, by the way that the upper end and the lower end of the piston rod 2 are respectively fixed to the frame 10 and the battery compartment 12, the structural strength of the connection between the frame 10 and the battery compartment 12 can be effectively improved, and the structural deformation at the connection between the frame 10 and the battery compartment 12 can be prevented.

[0122] Embodiment 5

[0123] Based on Embodiments 2 and 3, the unicycle further includes a battery compartment 12 and a pedal 13. The pedal 13 is arranged on the battery compartment 12, and the battery compartment 12 is arranged on the frame 10.

[0124] Both the upper end and the lower end of the piston rod 2 are connected to the battery compartment 12; wherein, a fixing block is arranged at the upper end of the piston rod 2, an arc groove matching the shape of the piston rod is formed on the fixing block, and the battery compartment 12 has an arc groove corresponding to the shape of the piston rod at the position corresponding to the fixing block. When the fixing block is installed on the battery compartment 12, the upper end of the piston rod 2 in the middle is pressed and fixed through the arc grooves on both sides, and the lower end of the piston rod 2 is fixedly connected to the battery compartment 12 through the second mounting block 206.

[0125] In one application scenario based on the above Embodiments 2-5, the pedal 13 is connected to the battery compartment 12, and the battery compartment 12 is fixedly connected to the upper end of the piston rod 2 in the shock absorber; it can make the pedal 13 and the battery compartment move up and down synchronously with the piston rod 2 in the shock absorber when the shock absorber is damping, avoiding the situation that the battery compartment 12 gets stuck on the feet due to the asynchronous movement of the pedal 13 and the battery compartment 12, and effectively improving the user experience.

[0126] In another application scenario based on the above Embodiments 2-5, the pedal 13 is connected to the second mounting block 206 in the shock absorber; it can make the pedal 13 and the battery compartment be independently arranged. When it is necessary to repair the pedal 13 or replace the battery in the battery compartment 12, the pedal 13 or the battery compartment 12 can be removed separately, without the need to remove both the pedal 13 and the battery compartment 12 at the same time, which is more convenient in daily use and maintenance.

[0127] The above are only the preferred embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A two-way shock absorber, characterized in that, It includes a main body pipe (1), a piston rod (2) and a first elastic member (3): At both ends of the main body pipe (1), a first guide seat (101) and a second guide seat (102) are respectively arranged; The piston rod (2) is slidably arranged in the main body pipe (1), and both ends of the piston rod (2) respectively penetrate through the first guide seat (101) and the second guide seat (102); The first elastic member (3) is arranged in the main body pipe (1). A limiting block (21) is arranged at one end of the piston rod (2) facing the first guide seat (101). One end of the first elastic member (3) abuts against the limiting block (21), and the other end of the first elastic member (3) abuts against the bottom of the main body pipe (1); Alternatively, the first elastic member (3) is located outside the main body pipe (1). A limiting block (21) is arranged at the upper end of the piston rod (2). The first elastic member (3) abuts between the top of the first guide seat (101) and the bottom of the limiting block (21).

2. The bi-directional shock absorber according to claim 1, wherein It further includes a working cylinder barrel (4) and a piston (5). The working cylinder barrel (4) is arranged at the bottom of the main body pipe (1). The piston (5) is connected to the piston rod (2). The piston (5) forms a first piston chamber (401) and a second piston chamber (402) in the working cylinder barrel (4); A third guide seat (403) is arranged at the top of the working cylinder barrel (4). The piston rod (2) penetrates through the third guide seat (403).

3. The bi-directional shock absorber according to claim 2, characterized in that, It further includes an oil storage cylinder barrel (6). The oil storage cylinder barrel (6) is arranged at the bottom of the main body pipe (1), and the oil storage cylinder barrel (6) is sleeved outside the working cylinder barrel (4); A plurality of first through holes (404) are arranged at the bottom of the second piston chamber (402) and are communicated with the oil storage cylinder barrel (6); A first stop block (601) is arranged at the top of the oil storage cylinder barrel (6). The first elastic member (3) abuts against the first stop block (601); And / or, a second elastic member (405) is further arranged in the first piston chamber (401). One end of the second elastic member (405) abuts against the piston (5), and the other end of the second elastic member (405) abuts against the third guide seat (403).

4. The bi-directional shock absorber according to claim 3, characterized in that, A second through hole (602) is arranged on the outer wall of the oil storage cylinder barrel (6). The oil storage cylinder barrel (6) is communicated with the main body pipe (1) through the second through hole (602).

5. The bi-directional shock absorber according to claim 2, characterized in that, The piston rod (2) includes a first piston shaft (201), a second piston shaft (202) and a connecting block (203) arranged coaxially. The first piston shaft (201) is fixedly connected to the second piston shaft (202) through the connecting block (203). The connecting block (203) is located in the first piston chamber (401); The first piston shaft (201), the connecting block (203) and the second piston shaft (202) are internally communicated to form a hydraulic oil pipeline, and the hydraulic oil pipeline communicates the first piston chamber (401) with the second piston chamber (402); A second damping valve is provided on the pipeline formed by the second piston shaft (202) and the connecting block (203).

6. The bi-directional shock absorber according to claim 5, wherein, The first piston shaft (201) is provided with a second stop block (204), and the second stop block (204) is located between the third guide seat (403) and the connecting block (203) for limiting the moving stroke of the first piston shaft (201); And / or, a third through hole (205) is provided at the end of the second piston shaft (202) close to the piston (5), and the third through hole (205) communicates with the hydraulic oil pipeline.

7. The bi-directional shock absorber according to claim 5, wherein, A main shaft valve core (7) is arranged inside the first piston shaft (201), and the main shaft valve core (7), the first piston shaft (201) and the connecting block (203) form a third damping valve, and the main shaft valve core (7) is used to adjust the damping effect of the third damping valve; A third elastic member (701) is arranged between the main shaft valve core (7) and the connecting block (203), and the third elastic member (701) is used to reset the main shaft valve core (7).

8. The bi-directional shock absorber according to any one of claims 1-7, characterized in that, At least one annular inner groove is provided on the inner circumferential surfaces of the first guide seat (101) and the second guide seat (102), and a dynamic sealing element (8) is arranged in the annular inner groove, and the dynamic sealing element (8) abuts against the piston rod (2); And / or, at least one annular outer groove is provided on the outer circumferential surfaces of the first guide seat (101) and the second guide seat (102), and a static sealing element (9) is arranged in the annular outer groove, and the static sealing element (9) abuts against the main body pipe (1); And / or, first mounting blocks (103) are respectively arranged at both ends of the main body pipe (1); second mounting blocks (206) are respectively arranged at both ends of the piston rod (2).

9. A unicycle, characterized in that, It includes a vehicle frame, a driving wheel and a bidirectional shock absorber. The bidirectional shock absorber is the bidirectional shock absorber according to any one of claims 1-8. Two bidirectional shock absorbers are symmetrically arranged on both sides of the driving wheel. The piston rod (2) in the bidirectional shock absorber is connected to the vehicle frame (10), and the main body pipe (1) in the bidirectional shock absorber is connected to the driving wheel (11); Wherein, the connection between the main body pipe (1) in the bidirectional shock absorber and the driving wheel (11) includes: the main body pipe (1) is directly connected to the driving wheel (11), or the main body pipe (1) is connected to the driving wheel (11) by an intermediate member; The unicycle further includes a battery compartment (12), and the battery compartment (12) is arranged on the vehicle frame (10); the connection between the piston rod (2) in the bidirectional shock absorber and the vehicle frame (10) includes: the upper end of the piston rod (2) is connected to the vehicle frame (10), the lower end of the piston rod (2) is connected to the battery compartment (12), or both the upper end and the lower end of the piston rod (2) are connected to the battery compartment (12).

10. The unicycle according to claim 9, characterized in that, It further includes a pedal (13), and the pedal (13) is arranged on the battery compartment (12) or the vehicle frame (10).

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