Bidirectional damper and damping module

Abstract

The invention relates to a bidirectional shock absorber and a shock absorption module. The two-way shock absorber comprises a main body pipe, a piston rod and a first elastic piece. A first guide seat and a second guide seat are arranged at the two ends of the main body pipe correspondingly. 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 invention belongs to the technical field of shock absorbers, and in particular relates to a bidirectional shock absorber and a shock absorbing module. Background Art

[0002] A damping shock absorber is a type of shock absorber with better shock absorption effect. It is used to suppress the vibration caused by the rebound of the spring 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 in the piston cylinder, and damping oil is contained 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, in the existing shock absorber, the bottom end of the piston rod is located inside the piston cylinder, and the shock absorbing stroke is short. When encountering a bumpy road surface, the shock absorbing effect of the shock absorber is limited, which can easily cause an uncomfortable bumpy feeling to the user; and when the shock absorber is used on a wheelbarrow, the spring sleeve of the existing shock absorber is arranged on the outside of the shock absorber, and the spring is easily attached to mud and affects its deformation performance. In addition, the external placement of the spring makes the overall space of the shock absorber larger, which is not conducive to optimizing the layout design of the wheelbarrow. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a bidirectional shock absorber to solve the problems that the prior art has a short shock absorbing stroke, and when encountering a bumpy road surface, the shock absorbing effect of the shock absorber is limited, which easily causes an uncomfortable bumpy feeling to the user; and the external spring is not conducive to optimizing the layout design of the wheelbarrow.

[0005] One solution of the present invention provides a bidirectional shock absorber, comprising a main body tube, a piston rod and a first elastic member: The two ends of the main body tube are respectively provided with a first guide seat and a second guide seat; The piston rod is slidably disposed in the main body tube, and two ends of the piston rod respectively penetrate the first guide seat and the second guide seat; The first elastic member is arranged in the main body tube, a limit 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 limit block, and the other end of the first elastic member abuts against the bottom of the main body tube; Alternatively, the first elastic member is located outside the main body tube, a limiting block is provided at the upper end of the piston rod, and the first elastic member is abutted between the top of the first guide seat and the bottom of the limiting block.

[0006] In this solution, the two ends of the piston rod respectively pass through the first guide seat and the second guide seat, and the piston rod is slidably arranged in the main body tube, so that the shock absorbing stroke of the piston rod is longer than that of the existing solution, and the shock absorbing effect of the shock absorber is improved, and the user can also have a better use experience on a bumpy road. In addition, the structure of the shock absorber is more compact, the overall rigidity of the shock absorbing module is stronger, and the swing amount is smaller; Furthermore, by arranging the first elastic member in the main body tube and sleeve-mounting the main body tube and the piston rod, the two ends of the first elastic member respectively abut against the limit block on the piston rod and the bottom of the main body tube, so that the structure of the shock absorber is more compact, which is beneficial to the layout design of the wheelbarrow, makes the appearance of the vehicle more tidy, and improves the overall aesthetics of the vehicle; and the built-in elastic member reduces the direct effect of external factors on the first elastic member, such as mud, sand, 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 changes more quickly.

[0007] In one of the schemes, the two-way shock absorber further includes a working cylinder and a piston, wherein the working cylinder is arranged at the bottom of the main body tube, the piston is connected to the piston rod, and the piston forms a first piston chamber and a second piston chamber in the working cylinder; A third guide seat is arranged on the top of the working cylinder, and the piston rod passes through the third guide seat.

[0008] In the present solution, a third guide seat is provided at the top of the working cylinder barrel so that the piston rod and the working cylinder barrel are kept coaxial. When a vehicle using the shock absorber of the present solution encounters a bumpy road section, the piston rod drives the piston inside the working cylinder barrel to move upward, the space of the first piston chamber is compressed, and the space of the second piston chamber is expanded, so that the hydraulic oil in the first piston chamber flows to the second piston chamber. At the same time, the first elastic member produces compression deformation, and part of the impact force is accumulated inside the first elastic member. It can be understood that in the process of the piston rod being impacted and moved, part of the impact force is converted into heat energy in 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. In the process of the hydraulic oil flowing from the second piston chamber to the first piston chamber, the hydraulic oil also converts part of the impact force released by the first elastic member into heat energy, and transfers it to the outside through the working cylinder barrel and the main body tube, thereby reducing the uncomfortable bumpy feeling caused to the user by the bumpy road section.

[0009] In one of the schemes, the two-way shock absorber further includes an oil storage cylinder, which is arranged at the bottom of the main body tube and sleeved on the outside of the working cylinder; a plurality of first through holes are arranged at the bottom of the second piston chamber and communicated with the oil storage cylinder; A first stopper is disposed on the top of the oil storage cylinder, and the first elastic member is disposed in contact with the first stopper; And / or, a second elastic member is further provided 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.

[0010] In this solution, an oil storage cylinder is arranged on the outside of the working cylinder. When the piston rod moves downward, the hydraulic oil in the second piston chamber not only flows to the first piston chamber, but also flows to the oil storage cylinder through a plurality of first through holes. It can be understood that when the hydraulic oil flows between the second piston chamber and the oil storage cylinder, the impact force is converted into heat energy, thereby improving the shock absorption effect of the shock absorber. Furthermore, by arranging a second elastic member in the first piston chamber, when the piston moves up and down, the second elastic member absorbs and releases the impact force synchronously with the first elastic member, thereby further improving the absorption effect of the impact force.

[0011] In one of the solutions, the outer wall of the oil storage cylinder is provided with a second through hole, and the oil storage cylinder is connected with the main body pipe through the second through hole; And / or, a first damping valve is disposed on an outer wall of the oil storage cylinder, and the oil storage cylinder is connected to the main body pipe through the first damping valve.

[0012] In one of the schemes, the piston rod includes a first piston shaft, a second piston shaft and a connecting block which are coaxially arranged, the first piston shaft is fixedly connected to the second piston shaft through the connecting block, and the connecting block is located in the first piston chamber; The first piston shaft, the connecting block and the second piston shaft are internally connected to form a hydraulic oil pipeline, and the hydraulic oil pipeline is connected to the first piston chamber and the second piston chamber; A second damping valve is arranged on the pipeline formed by the second piston shaft and the connecting block.

[0013] In this solution, the first damping valve and the second damping valve form the damping force of the shock absorber. The first damping valve and the second damping valve limit the flow of hydraulic oil passing through it, so that the hydraulic oil molecules rub against each other or the hydraulic oil rubs against the damping valve, converting the heat energy carried by the hydraulic oil when it flows into heat energy, reducing the impact and vibration of the shock absorber caused by uneven road surface, thereby providing a smoother driving experience for vehicles with shock absorbers and improving driving safety.

[0014] In one of the solutions, the first piston shaft is provided with a second stopper, the second stopper is located between the third guide seat and the connecting block, and is used to limit the moving stroke of the first piston shaft; 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 is connected to the hydraulic oil pipeline.

[0015] In one of the solutions, a main shaft valve core is arranged inside the first piston shaft, the main shaft valve, the first piston shaft and the connecting block form a third damping valve, and the main shaft valve core is used to adjust the damping effect of the third damping valve; A third elastic member is provided between the main shaft valve core and the connecting block, and the third elastic member is used for resetting the main shaft valve core.

[0016] In this solution, an adjustable spindle valve core is provided inside the first piston shaft, and the tapered end of the spindle valve core corresponds to the channel opening at the top of the connecting block. When the relative position of the spindle valve core is adjusted by the adjusting member, the tapered end is moved away from or close to the channel opening at the top of the connecting block, so as 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 automatically or according to the driver's choice to adapt to different driving conditions and road conditions. And by providing the third elastic member, the spindle valve core can be restored to its original position without the action of external force.

[0017] In one embodiment, the inner ring surfaces of the first guide seat and the second guide seat are each provided with at least one annular inner groove, and the annular inner groove is provided with a dynamic sealing element, and the dynamic sealing element abuts against the piston rod; And / or, the outer ring surfaces of the first guide seat and the second guide seat are each provided with at least one annular outer groove, the annular outer groove is provided with a static sealing element, and the static sealing element abuts against the main body tube.

[0018] In one of the solutions, first mounting blocks are respectively disposed at both ends of the main body tube, and the first mounting blocks are symmetrically disposed along the central axis of the main body tube; Second mounting blocks are respectively arranged at both ends of the piston rod.

[0019] In one of the schemes, a shock absorbing module is further provided, comprising a mounting bracket, a driving wheel and two shock absorbers, wherein the shock absorber is a bidirectional shock absorber as described in any one of the above-mentioned schemes; the driving wheel is matched with a main body tube in the shock absorber, and the two shock absorbers are symmetrically arranged on both sides of the driving wheel; the mounting bracket is matched with a piston rod in the shock absorber, and a battery compartment is installed on the mounting bracket; Wherein, one end of the piston rod is connected to the mounting bracket, and the other end of the piston rod is connected to the battery compartment; or, both ends of the piston rod are connected to the battery compartment; The matching of the driving wheel and the main body tube in the shock absorber includes: the main body tube is directly connected to the driving wheel, or the main body tube is connected to the driving wheel by using a transition piece.

[0020] In one embodiment, the shock absorbing module further includes a pedal, and the pedal is connected to the battery compartment; or the pedal is connected to the shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A schematic diagram showing the structure of the bidirectional shock absorber of the present invention; Figure 2 A schematic diagram showing the explosion deployment structure of the bidirectional shock absorber of the present invention; Figure 3 A schematic diagram showing the structure of the piston rod, the first elastic member and the working cylinder barrel in cooperation with each other in the present invention; Figure 4 Indicates along Figure 3 Schematic diagram of the cross-sectional structure in the AA direction; Figure 5 express Figure 4 A schematic diagram of the enlarged structure at A1 in the middle; Figure 6 express Figure 4 A schematic diagram of the enlarged structure at A2 in the middle; Figure 7 A structural schematic diagram showing the cooperation between the piston rod, the first elastic member and the working cylinder barrel from another perspective of the present invention; Figure 8 Indicates along Figure 7 Schematic diagram of the cross-sectional structure in the middle BB direction; Fig. 9 express Figure 8 A schematic diagram of the enlarged structure at B1 in the middle; Fig.10 express Figure 8 A schematic diagram of the enlarged structure at B2 in the middle; Fig.11 A schematic structural diagram showing a bidirectional shock absorber according to another embodiment of the present invention; Fig.12 A schematic diagram showing the structure of a shock absorbing module according to one embodiment of the present invention; Fig.13 A schematic structural diagram of a shock absorbing module according to another embodiment of the present invention is shown.

[0023] The following are the descriptions of the reference numerals: 1-main tube; 101-first guide seat; 102-second guide seat; 103-first mounting block; 2-piston rod; 21-limiting block; 201-first piston shaft; 202-second piston shaft; 203-connecting block; 204-second stopper; 205-third through hole; 206-second mounting block; 207-damping adjustment block; 3-first elastic member; 4-working cylinder; 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; 601-first stopper; 602-second through hole; 7-spindle valve core; 701-third elastic member; 8-dynamic sealing element; 9-static sealing element; 10-mounting bracket; 11-battery compartment. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] 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 used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] The elastic member is used to reduce vibration and impact. According to different usage scenarios, leaf springs, springs, plastic springs, elastic supports or air springs, etc. can be used; in this specific embodiment, the first elastic member, the second elastic member and the third elastic member are springs.

[0028] Example 1 Please refer to Figure 1 and Figure 2 In one embodiment, a bidirectional shock absorber is provided, including a main body tube 1, a piston rod 2 and a first elastic member 3: The two ends of the main body tube 1 are respectively provided with a first guide seat 101 and a second guide seat 102; The piston rod 2 is slidably disposed in the main body tube 1, and two ends of the piston rod 2 respectively penetrate the first guide seat 101 and the second guide seat 102; The first elastic member 3 is arranged in the main body tube 1, and a limiting block 21 is provided 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 tube 1.

[0029] In this solution, the two ends of the piston rod 2 pass through the first guide seat 101 and the second guide seat 102 respectively, and the piston rod 2 is slidably arranged in the main body tube 1, so that the shock absorbing stroke of the piston rod 2 is longer than that of the existing solution, and the shock absorbing effect of the shock absorber is improved, and the user can also have a better use experience on a bumpy road. In addition, the structure of the shock absorber is more compact, the overall rigidity of the shock absorbing module is stronger, and the swing amount is smaller; Furthermore, by arranging the first elastic member 3 in the main body tube 1 and sleeve-mounting the main body tube 1 and the piston rod 2, the two 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, so that the structure of the shock absorber is more compact, which is beneficial to the layout design of the wheelbarrow, makes the appearance of the vehicle more tidy, and improves the overall aesthetics of the vehicle; and the built-in elastic member reduces the direct effect of external factors on the first elastic member 3, such as mud, sand, 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 changes more quickly.

[0030] 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 slidingly arranged in the guide holes of the first guide seat 101 and the second guide seat 102 remains 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.

[0031] 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 toward the first guide seat 101 or the second guide seat 102. The two-way shock absorber has a larger sliding stroke than a one-way shock absorber with one end restricted in the piston cylinder.

[0032] Furthermore, by setting a limit block 21 on the piston rod 22, the limit block 21 will contact and limit the first guide seat 101 set on the top of the main body tube 1 after the piston rod 2 moves to the limit, which not only realizes the limitation of the maximum sliding stroke of the piston rod 2, but also can set the first elastic member 3 inside the main body tube 1 through the limit block 21, and realize the accumulation and delayed release of impact force through the first elastic member 3. At the same time, the first elastic member 3 is directly transmitted to the piston rod 2 inside the main body tube 1, so as to better realize the resetting of the piston rod 2.

[0033] Please refer to Figure 3-Figure 6 In one embodiment, the bidirectional shock absorber further comprises a working cylinder 4 and a piston 5, wherein the working cylinder 4 is disposed at the bottom of the main body tube 1, the piston 5 is connected to the piston rod 2, and the piston 5 forms a first piston chamber 401 and a second piston chamber 402 in the working cylinder 4; A third guide seat 403 is disposed on the top of the working cylinder 4 , and the piston rod 2 passes through the third guide seat 403 .

[0034] In this solution, a third guide seat is provided at the top of the working cylinder 4 to keep the piston rod 2 and the working cylinder 4 coaxial. When a vehicle using the shock absorber of this solution encounters a bumpy road, the piston rod 2 drives the piston inside the working cylinder 4 to move upward, the space in the first piston chamber 401 is compressed, and the space in the second piston chamber 402 is expanded, 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 produces a compression deformation, and part of the impact force is accumulated inside the first elastic member 3. It can be understood that in the process of the piston rod 2 being impacted and moved, a part of the impact force is generated. Part of the impact force is converted into heat energy in the process of 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, and in the process of 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 transferred to the outside through the working cylinder 4 and the main body tube 1, thereby reducing the uncomfortable bumpy feeling caused to the user by the bumpy road section.

[0035] Please refer to Figure 3-Figure 6 as well as Fig.10 In one embodiment, the two-way shock absorber further comprises an oil storage cylinder 6, which is arranged at the bottom of the main body tube 1 and sleeved on the outside of the working cylinder 4; a plurality of first through holes 404 are arranged at the bottom of the second piston chamber 402 and communicated with the oil storage cylinder 6; A first stopper 601 is disposed on the top of the oil storage cylinder 6, and the first elastic member 3 is disposed in contact with the first stopper 601; 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 .

[0036] In this embodiment, the oil storage cylinder 6 is sleeved on the outside of the working cylinder 4, and the bottom of the oil storage cylinder 6 is pressed against the annular plate at the bottom of the working cylinder 4; the oil storage cylinder 6 is threadedly connected by cooperating with the internal thread of the second guide seat 102 through the external thread at the bottom of the oil storage cylinder 6, 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, so as to realize the coaxial fixation of the working cylinder 4 and the oil storage cylinder 6.

[0037] In this solution, by arranging an oil storage cylinder 6 on the outside of the working cylinder, when the piston rod moves downward, the hydraulic oil in the second piston chamber 402 not only flows to the first piston chamber 401, but also flows to the oil storage cylinder 6 through a plurality of first through holes 404. It can be understood that when the hydraulic oil flows 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; Furthermore, by arranging the 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, thereby further improving the absorption effect of the impact force.

[0038] It can be understood that in the present embodiment, the piston rod 2, the piston 5, the working cylinder 4 and the oil storage cylinder 6 form a double-tube shock absorbing structure. When the wheel of the shock absorber of the present embodiment encounters an uneven road surface, the piston moves up and down in the working cylinder 4. 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 oil storage cylinder 6, the inert gas inside the oil storage cylinder 6 forms a gas cushion to assist in absorbing shocks and vibrations. In addition, hydraulic oil is always retained at the bottom of the oil storage cylinder 6 to prevent inert gas from entering the working cylinder.

[0039] In one embodiment, the piston 5 is provided with a damping valve to further improve the shock absorber's absorption effect on impact force.

[0040] In one embodiment, the outer wall of the oil storage cylinder 6 is provided with a second through hole 602, and the oil storage cylinder 6 is connected with the main body pipe 1 through the second through hole 602; And / or, a first damping valve is disposed on an outer wall of the oil storage cylinder 6 , and the oil storage cylinder 6 is connected to the main pipe 1 through the first damping valve.

[0041] It can be understood that in the present embodiment, when the oil storage cylinder 6 is connected to the main pipe 1, the bottom of the main pipe 1 and the oil storage cylinder 6 are immersed in the hydraulic oil, and the inert gas is filled in the inside of the main pipe 1; on bumpy roads, the gas cushion formed by the inert gas inside the main pipe 1 can achieve better buffering and absorption effects; at the same time, the oil storage cylinder 6 is immersed in the hydraulic oil, and the oil storage cylinder 6 is connected to the main pipe 1 through the first damping valve or a plurality of second through holes 602, which can more effectively prevent the inert gas from entering the inside of the working cylinder 4.

[0042] 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 via the connecting block 203, and 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 connected to form a hydraulic oil pipeline, and the hydraulic oil pipeline is connected to the first piston chamber 401 and the second piston chamber 402; A second damping valve is arranged on the pipeline formed by the second piston shaft 202 and the connecting block 203 .

[0043] In this solution, the first damping valve and the second damping valve form the damping force of the shock absorber. The first damping valve and the second damping valve limit the flow of hydraulic oil passing through it, so that the hydraulic oil molecules rub against each other or the hydraulic oil rubs against the damping valve, converting the heat energy carried by the hydraulic oil when it flows into heat energy, reducing the impact and vibration of the shock absorber caused by uneven road surface, thereby providing a smoother driving experience for vehicles with shock absorbers and improving driving safety.

[0044] In one embodiment, the first piston shaft 201 is provided with a second stopper 204, and the second stopper 204 is located between the third guide seat 403 and the connecting block 203, and is used to limit the movement 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 is connected to the hydraulic oil pipeline.

[0045] Please refer to Figure 4-Figure 6 In one embodiment, a spindle valve core 7 is disposed inside the first piston shaft 201, and the spindle valve core 7, the first piston shaft 201 and the connecting block 203 form a third damping valve, and the spindle valve core 7 is used to adjust the damping effect of the third damping valve; A third elastic member 701 is disposed between the spindle valve core 7 and the connecting block 203 , and the third elastic member 701 is used to reset the spindle valve core 7 .

[0046] In this solution, the first piston shaft 201 is provided with an adjustable spindle valve core 7, and the tapered end of the spindle valve core 7 corresponds to the channel opening at the top of the connecting block 203. When the relative position of the spindle valve core 7 is adjusted by the adjusting member, the tapered end is moved away from or close to the channel opening at the top of the connecting block 203, so as 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 choice or automatically to adapt to different driving conditions and road conditions. And by providing the third elastic member 701, the spindle valve core 7 can be restored to its original position without the action of external force.

[0047] In one embodiment, a sliding channel is provided along the axial direction of the first piston shaft 201, and the main shaft valve core 7 is slidably set in the sliding channel. A damping adjustment block 207 is provided at the end of the first piston shaft 201. The damping adjustment block 207 is set at the opening of the sliding channel through a connecting threaded adjustable position, 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.) for facilitating adjustment of its relative position. The user only needs to use 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, so that the user can adjust the damping force of the third damping valve to adapt to different road conditions or the usage habits of different users.

[0048] In an application scenario of this embodiment, at least two sealing rings are arranged between the main shaft valve core 7 and the sliding channel to prevent the hydraulic oil from leaking from the sliding gap.

[0049] Please refer to Figure 8-Figure 10 In one embodiment, the inner ring surfaces of the first guide seat 101 and the second guide seat 102 are each provided with at least one annular inner groove, and the annular inner groove is provided with a dynamic sealing element 8, and the dynamic sealing element 8 abuts against the piston rod 2; And / or, the outer ring surfaces of the first guide seat 101 and the second guide seat 102 are each provided with at least one annular outer groove, and the annular outer groove is provided with a static sealing element 9, and the static sealing element 9 abuts against the main body tube 1.

[0050] In this solution, the dynamic sealing element 8 is used to prevent the hydraulic oil from leaking axially along the piston rod, and also to prevent contaminants from entering the interior of the main tube; the dynamic sealing element 8 can be an O-ring or an oil seal; and the static sealing element 9 is used to prevent the hydraulic oil or the inert gas in the main tube from leaking along the connection between the first guide seat 101 or the second guide seat 102 and the main tube, and the static sealing element is an O-ring.

[0051] In one embodiment, first mounting blocks 103 are respectively disposed at both ends of the main body tube 1, and the first mounting blocks 103 are symmetrically disposed along the central axis of the main body tube 1; Second mounting blocks 206 are respectively provided at both ends of the piston rod 2 .

[0052] In an application scenario of the present embodiment, the first mounting block 103 symmetrically arranged along the central axis of the main tube 1 is used to fix the main tube 1 to the wheel; the second mounting blocks 206 arranged at both ends of the piston rod are used to connect the piston rod 2 to the frame of the vehicle; so that when a vehicle with the two-way shock absorber of the present embodiment is driving on bumpy roads, the wheel connected to the main tube 1 moves up and down or vibrates after being impacted, and the piston rod 2 in the main tube 1 moves up and down relative to the main tube 1, and the sliding stroke of the piston rod 2 is larger, which increases the absorption and conversion of the shock absorber to the impact force, reduces the impact force directly transmitted to the frame, and can achieve a better shock absorption effect.

[0053] Example 2 Please refer to Fig.11 In one embodiment, a bidirectional shock absorber is provided, including a main body tube 1, a piston rod 2 and a first elastic member 3: The two ends of the main body tube 1 are respectively provided with a first guide seat 101 and a second guide seat 102; The piston rod 2 is slidably disposed in the main body tube 1, and two ends of the piston rod 2 respectively penetrate the first guide seat 101 and the second guide seat 102; The first elastic member 3 is located outside the main body tube 1 , a limiting block 21 is provided 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 limiting block 21 .

[0054] In this embodiment, the two ends of the piston rod 2 pass through the first guide seat 101 and the second guide seat 102 respectively, and the piston rod 2 is slidably arranged in the main body tube 1, so that the shock absorbing stroke of the piston rod 2 is longer than that of the existing scheme, thereby improving the shock absorbing effect of the shock absorber, and ensuring that the user has a better user experience even on bumpy roads. In addition, the structure of the shock absorber is more compact, the overall rigidity of the shock absorbing module is stronger, and the swing amount is smaller.

[0055] The limit block 21 is used to limit the upward sliding stroke of the main tube 1. At the same time, the limit block 21 serves as a fixed end point of the first elastic member 3, so that the first elastic member 3 absorbs the impact force transmitted when the main tube 1 slides through elastic deformation.

[0056] Example 3 In one embodiment, a shock absorbing module is provided. It comprises a mounting bracket, a driving wheel and two shock absorbers, wherein the shock absorber is a bidirectional shock absorber according to any one of claims 1 to 8; the driving wheel is matched with a main body tube 1 in the shock absorber, and the two shock absorbers are symmetrically arranged on both sides of the driving wheel; the mounting bracket 10 is matched with a piston rod 2 in the shock absorber, and a battery compartment 11 is installed on the mounting bracket 10; Please refer to Fig.12 and 13 , one end of the piston rod 2 is connected to the mounting bracket 10, and the other end of the piston rod 2 is connected to the battery compartment 11; or, both ends of the piston rod 2 are connected to the battery compartment 11; The driving wheel and the main body tube 1 in the shock absorber are matched in the following ways: the main body tube 1 is directly connected to the driving wheel, or the main body tube 1 is connected to the driving wheel by using a transition piece.

[0057] In one of the implementation scenarios of this embodiment, when the diameter of the main tube 1 is similar to the size of the motor shaft in the driving wheel (a hub motor may be used), or the diameter of the motor shaft in the driving wheel is larger than the diameter of the main tube 1, a connecting piece (such as a fixing bolt) can be installed on the main tube 1 to directly fix it to the motor shaft in the driving wheel, thereby making the structure of the shock absorbing module more compact (not shown in the figure in this embodiment).

[0058] In another implementation scenario of this embodiment, when the diameter of the main tube 1 is much larger than the diameter of the motor shaft in the driving wheel (a hub motor may be used) (for example, the diameter of the motor shaft is only half or less than the diameter of the main tube 1), in order to ensure that the main tube 1 and the driving wheel can be effectively fixed, a transition piece is installed on the side of the main tube 1 facing the driving wheel or on the end of the motor shaft facing the main tube. The size of the transition piece is at least similar to the diameter of the main tube 1, and then fixedly connected to the motor shaft or the main tube 1 through the other side of the transition piece. The transition piece can be a connecting plate piece (such as a connecting plate) having a corresponding connection structure of the above two and having a certain thickness. Fig.12 A rectangular block connected by the first connecting member 103).

[0059] In one of the embodiments, it also includes a pedal, which is connected to the battery compartment 11, and the battery compartment 11 is fixedly connected to the upper end of the piston rod 2 in the shock absorber; this embodiment can make the pedal and the battery compartment move up and down synchronously with the piston rod 2 in the shock absorber when the shock absorber is absorbing shock, thereby avoiding the battery compartment 11 being stuck due to the asynchronous movement of the pedal and the battery compartment 11, effectively improving the user experience.

[0060] In another scenario of the embodiment, the pedal is connected to the second mounting block 206 in the shock absorber; this embodiment allows the pedal and the battery compartment to be set independently of each other. When the pedal needs to be repaired or the battery in the battery compartment 11 needs to be replaced, the pedal or the battery compartment 11 can be removed separately without removing the pedal and the battery compartment 11 at the same time, which is more convenient in daily use and maintenance.

[0061] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A bidirectional shock absorber, characterized in that: It comprises a main body tube (1), a piston rod (2) and a first elastic member (3): The two ends of the main body tube (1) are respectively provided with a first guide seat (101) and a second guide seat (102); The piston rod (2) is slidably arranged in the main body tube (1), and two ends of the piston rod (2) respectively penetrate the first guide seat (101) and the second guide seat (102); 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); Alternatively, the first elastic member (3) is located outside the main body tube (1), a limit block (21) is provided at the upper end of the piston rod (2), and the abutment of the first elastic member (3) is provided between the top of the first guide seat (101) and the bottom of the limit block (21).

2. The bidirectional shock absorber according to claim 1, characterized in that: It also comprises a working cylinder (4) and a piston (5), wherein 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), and the piston (5) forms a first piston chamber (401) and a second piston chamber (402) in the working cylinder (4); A third guide seat (403) is provided at the top of the working cylinder (4), and the piston rod (2) passes through the third guide seat (403).

3. The bidirectional shock absorber according to claim 2, characterized in that: It also includes an oil storage cylinder (6), which is arranged at the bottom of the main body tube (1) and sleeved on the outside of the working cylinder (4); a plurality of first through holes (404) are arranged at the bottom of the second piston chamber (402) and communicated with the oil storage cylinder (6); A first stopper (601) is disposed at the top of the oil storage cylinder (6), and the first elastic member (3) is disposed in contact with the first stopper (601); And / or, a second elastic member (405) is further provided 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 bidirectional shock absorber according to claim 3, characterized in that: The outer wall of the oil storage cylinder (6) is provided with a second through hole (602), and the oil storage cylinder (6) is connected to the main body pipe (1) through the second through hole (602); 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 connected to the main body pipe (1) via the first damping valve.

5. The bidirectional shock absorber according to claim 2, characterized in that: The piston rod (2) comprises 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) via the connecting block (203); and 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 connected to form a hydraulic oil pipeline, and the hydraulic oil pipeline is connected to the first piston chamber (401) and the second piston chamber (402); A second damping valve is arranged on the pipeline formed by the second piston shaft (202) and the connecting block (203).

6. The bidirectional shock absorber according to claim 5, characterized in that: The first piston shaft (201) is provided with a second stopper (204), and the second stopper (204) is located between the third guide seat (403) and the connecting block (203) and is used to limit the movement 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) is connected to the hydraulic oil pipeline.

7. The bidirectional shock absorber according to claim 5, characterized in that: 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; the main shaft valve core (7) is used to adjust the damping effect of the third damping valve; A third elastic member (701) is provided between the main shaft valve core (7) and the connecting block (203), and the third elastic member (701) is used for resetting the main shaft valve core (7).

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

9. A shock absorbing module, characterized in that: The invention comprises a mounting bracket (10), a driving wheel and two shock absorbers, wherein the shock absorber is a bidirectional shock absorber according to any one of claims 1 to 8; the driving wheel is matched with a main body tube (1) in the shock absorber, and the two shock absorbers are symmetrically arranged on both sides of the driving wheel; the mounting bracket (10) is matched with a piston rod (2) in the shock absorber, and a battery compartment (11) is installed on the mounting bracket (10); Wherein, one end of the piston rod (2) is connected to the mounting bracket (10), and the other end of the piston rod (2) is connected to the battery compartment (11); or, both ends of the piston rod (2) are connected to the battery compartment (11); The driving wheel and the main body tube (1) in the shock absorber are matched in the following ways: the main body tube (1) is directly connected to the driving wheel, or the main body tube (1) is connected to the driving wheel by using a transition piece.

10. The shock absorbing module according to claim 9, characterized in that: It also comprises a pedal, which is connected to the battery compartment (11); or, the pedal is connected to the shock absorber.

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