Vehicle shock absorber capable of achieving high-precision hardness adjustment

Abstract

The utility model aims to provide a vehicle shock absorber capable of realizing high-precision soft and hard adjustment, which is optimized on the basis of the existing adjustable shock absorber, realizes adaptive adjustment of rebound effect in different working scenes, and further optimizes the driving experience of passengers when a vehicle is driven in complex and special scenes. The shock absorber comprises a cylinder body and a piston rod which are matched with each other and connected in a nested and inserted mode, and the piston rod can ascend and descend relative to the cylinder body in the vertical direction. An external thread face is formed on the outer surface of the cylinder body, an adjustable connecting sleeve is installed on the outer side of the cylinder body, an internal thread face correspondingly matched with the external thread face is formed on the inner side of the adjustable connecting sleeve, and the adjustable connecting sleeve can adjust the relative height position of the adjustable connecting sleeve relative to the cylinder body through rotating motion. An upper supporting and abutting face is formed at the upper end of the piston rod, a lower supporting and abutting face is formed on the adjustable connecting sleeve, and a reset supporting and abutting spring is arranged between the upper supporting and abutting face and the lower supporting and abutting face.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of shock absorber device products for vehicle, concretely is a shock absorber for vehicle can realize high accuracy soft and hard adjustment. BACKGROUND

[0002] The working principle of shock absorber for vehicle is mainly to use damping force to reduce the vibration and impact caused by uneven road surface or other factors during vehicle driving. In the vehicle suspension system, the shock absorber is usually used with elastic elements (such as springs) to jointly bear the tasks of shock absorption and damping. Specifically, the shock absorber is filled with oil inside, when the vehicle body is subjected to vibration, the piston inside the shock absorber will move up and down. During the movement of the piston, the oil will flow through a series of small holes, thereby generating damping force. This damping force can absorb and dissipate vibration energy, thereby reducing the jolt and sway of the vehicle body. The damping force of the shock absorber depends on multiple factors, including the viscosity of the oil, the size and number of small holes, and the moving speed of the piston, etc. Through reasonable design and adjustment, the shock absorber can provide appropriate damping force under different road conditions and driving speeds to ensure the stability of the vehicle body and the comfort of the ride. Although modern vehicle shock absorbers use many advanced technologies and materials, such as adjustable damping shock absorbers, electromagnetic shock absorbers, etc., the size of the damping force can be adjusted in real time according to the road conditions and driving state to better adapt to different driving conditions, to further improve the shock absorption effect and ride comfort. However, for some shock absorbers for vehicle used in wild environments, which require extremely high reliability, traditional mechanical structure type is still used to achieve the damping and rebound effect.

[0003] For example, in the Chinese utility model patent application file with application number CN202221191760.1, a soft and hard adjustable automobile shock absorber is disclosed, which relates to the technical field of shock absorber. The outer surface of the cylinder body is rectangular and has four groups of evenly distributed positioning holes. The surface of the cylinder body is slidably provided with a lower limiting piece. Four screw holes are formed in the side surface of the lower limiting piece in a rectangular shape and are adapted to the four groups of positioning holes. A screw is arranged in each screw hole and aligned with the positioning hole. The size of the screw is adapted to the positioning hole and the screw hole. The four screws are screwed into the four equal height positioning holes of other height to change the position of the lower limiting piece, thereby changing the distance between the upper and lower limiting pieces. The device can install springs of various lengths, increasing the practicality of the device. The upper limiting piece is connected with the piston rod through the external thread and the threaded hole. The lower limiting piece is installed on the cylinder body through the four screws, so that the upper and lower limiting pieces can be removed, facilitating the replacement of the two limiting pieces.

[0004] However, the applicant finds that in such a mechanical shock absorber product, the spring part for achieving the rebound effect is usually arranged in a fixed structure between the cylinder and the piston rod, so that the rebound effect and the riding experience provided to the passengers are difficult to adjust after the shock absorber product is delivered.

[0005] To solve the above problems, the utility model provides a kind of in the existing softness adjustable automobile shock absorber structure is based on, can adaptively adjust its rebound effect under different working mode Vehicle shock absorber product, to further optimize the passenger's driving experience when vehicle drives in complex special scene. Utility model content

[0006] The utility model provides a kind of in the existing softness adjustable automobile shock absorber structure is based on, can adaptively adjust its rebound effect under different working mode Vehicle shock absorber product, to further optimize the passenger's driving experience when vehicle drives in complex special scene.

[0007] The above technical purpose of the utility model is realized by the following technical scheme:

[0008] A kind of can realize high-precision softness adjustable vehicle shock absorber, it is characterized by: containing the nested plug-in of mutual cooperation cylinder and piston rod, the piston rod can be lifted relative to the cylinder in vertical direction;Formed with outer thread surface on the outer surface of the cylinder, and adjustable connecting sleeve is installed on the outside of the cylinder, the inside of the adjustable connecting sleeve is formed with the inner thread surface corresponding with the outer thread surface, the adjustable connecting sleeve can be adjusted relative height position of itself relative to the cylinder by rotating motion;Formed with upper abutment surface on the upper end of the piston rod, formed with lower abutment surface on the adjustable connecting sleeve, reset abutment spring is arranged between the upper abutment surface and lower abutment surface.

[0009] As preferred to the utility model, the anti-loose connecting sleeve is further arranged on the outside of the cylinder below the adjustable connecting sleeve, the inside of the anti-loose connecting sleeve is formed with the inner thread opposite in rotation direction with the adjustable connecting sleeve.

[0010] As preferred to the utility model, the adjustable connecting sleeve contains screwing connecting part for being connected with the cylinder, abutment annular part for being connected with the reset abutment spring, and locking bolt for connecting the screwing connecting part with the abutment annular part;Mounting hole is opened on the abutment annular part and extends along horizontal direction, and mounting slot is also opened on the abutment annular part and extends along horizontal direction, and the inside part segment of the locking bolt can be inserted into the mounting slot after passing through the mounting hole from outside to inside and connecting the screwing connecting part with the abutment annular part as a whole.

[0011] As the preferred of the utility model, the installation groove is arranged on the screw connection part from top to bottom.

[0012] As the preferred of the utility model, the material of the plug lock stop plug piece is selected to be hard alloy material.

[0013] As the preferred of the utility model, the inner limiting annular surface for limiting the end portion lateral sliding of the reset supporting spring is further formed on the supporting annular portion and the upper end portion of the piston rod.

[0014] As the preferred of the utility model, the inner supporting protection spring is further sleeved and arranged on the outer side.

[0015] In summary, the utility model can realize the following beneficial effects:

[0016] 1. The vehicle shock absorber with high-precision soft and hard adjustment function provided in the utility model is further optimized and improved on the basis of the existing vehicle shock absorber structure, compared with the original spring reset force which can only be adjusted in a certain interval and in a jumping mode, the adjustment structure is designed to change the reset supporting spring compression stroke and supporting force by rotating the screw thread. The structure can realize stepless adjustment of the rebound force of the shock absorber under simple mechanical structure design, even in harsh external working conditions such as mud, high dust impurities or electromagnetic interference, and further improve the stability of vehicle operation and the driving comfort of members.

[0017] 2. The vehicle shock absorber with high-precision soft and hard adjustment function provided in the utility model adopts a structure form in which the threaded screw structure and the multi-layer installation hole plug-in cooperation are matched, so that the actual use working state of the shock absorber product can be inserted and positioned in a generally appropriate reference reset force interval, and the threaded screw structure is rotated to adjust and control more carefully, further improving the accuracy of the rebound force control ability of the shock absorber. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic view of the vehicle shock absorber with high-precision soft and hard adjustment function provided in the utility model.

[0019] Figure 2 It is the schematic view of the vehicle shock absorber with high-precision soft and hard adjustment function adjusted to a low position and low hardness state.

[0020] Figure 3 It is the schematic view of the vehicle shock absorber with high-precision soft and hard adjustment function adjusted to a high position and high hardness state.

[0021] Figure 4 Fig. 1 is a schematic view of the connection relationship between the adjustable connecting sleeve and the cylinder body;

[0022] Figure 5 Fig. 2 is a schematic view of the connection relationship between the upper and lower ends of the reset abutment spring and the adjustable connecting sleeve and the piston rod respectively;

[0023] Figure 6 Fig. 3 is a schematic view of the installation relationship of the additionally added inner abutment protection spring.

[0024] In the drawings:

[0025] 1 - cylinder body, 101 - external threaded surface;

[0026] 2 - piston rod, 201 - upper abutment surface;

[0027] 3 - adjustable connecting sleeve, 301 - internal threaded surface, 302 - lower abutment surface, 303 - screw connection part, 304 - abutment annular part, 305 - locking bolt, 306 - mounting hole, 307 - mounting groove;

[0028] 4 - reset abutment spring;

[0029] 5 - anti-loose connecting sleeve;

[0030] 6 - inner limiting annular surface;

[0031] 7 - inner abutment protection spring. DETAILED DESCRIPTION

[0032] The following specific embodiments are only an explanation of the utility model, and are not a limitation of the utility model. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

[0033] The present scheme is realized through the following technical means:

[0034] Embodiment: In the present embodiment, a kind of compared to existing shock absorber device is given, which can adaptively adjust its rebound effect under different working modes on the basis of existing softness adjustable automobile shock absorber structure, to further optimize the passenger's driving experience when vehicle is driven in complex special scene.

[0035] Specifically, referring to the drawings attached in the specification Figure 1The structure shown, the vehicle shock absorber device is similar to the common conventional structure shock absorber, containing each other matching nested plug-in cylinder 1 and piston rod 2 two parts, the piston rod 2 can be lifted relative to the cylinder 1 in the vertical direction. The space formed by the cylinder 1 and the piston rod 2 is provided with buffer oil, which can provide corresponding damping buffer when the piston rod 2 is instantaneously subjected to strong impact extrusion, reduce the impact from the wheel to the body, improve the safety while optimizing the riding experience of the passengers. For this part of the buffer structure, not the main content of this embodiment to be expanded, so not to expand.

[0036] When the vehicle passes through the pit point, the shock absorber is compressed instantaneously, and the shock absorber itself also needs to have a certain rebound force to make the piston rod 2 move upward to a stretched state to cope with the impact from the road next time. In this structure, the reset spring part between the cylinder 1 and the piston rod 2 is used, the two ends of the reset spring part are respectively abutted with the abutting surface 201 on the piston rod 2 and the lower abutting surface 302 on the adjustable connecting sleeve 3 to provide the shock absorber with an outward force in the vertical direction to realize the reset action, and the reset action depending on the state of the top reset spring part will greatly affect the driving experience of the vehicle passengers.

[0037] In this embodiment, a further optimized connecting structure is designed compared with the traditional adjusting structure. First of all, it needs to be pointed out that in the traditional vehicle shock absorber product, different plug-in installation positions are adopted to realize multi-stage gradient adjustment, which will cause the working stroke of the spring to be adjusted to a state between two certain preset working positions. Obviously, at this time, under certain road conditions, the hardness of the shock absorber cannot be adjusted to the best suitable state, which affects the riding comfort.

[0038] Considering the above problems, therefore, in this application, the structure of the above-mentioned vehicle shock absorber product is optimized. A threaded structure is directly cut on the outside of the cylinder 1, or a sleeve part with external threads is fixed on the outside of the oil cylinder, and an adjustable connecting sleeve 3 with an internal threaded surface 301 is installed on the outside of the cylinder 1 through a threaded structure. At this time, the adjustable connecting sleeve 3 can adjust its relative height position relative to the cylinder 1 through rotational motion, and the adjusting method can realize the lifting of the lower end of the spring part to any height position within the preset range in a stepless adjustment manner, so that the hardness of the shock absorber device can meet the use requirements.

[0039] Further, in the embodiment, the structure of the adjustable connecting sleeve 3 is further decomposed and optimized. Specifically, the structure can refer to the structure shown in the drawings Figure 5 The adjustable connecting sleeve 3 comprises a screw connection part 303 for connecting with the cylinder body 1, an abutting annular part 304 for abutting with the reset abutting spring 4, and a locking bolt 305 for connecting the screw connection part 303 with the abutting annular part 304. The abutting annular part 304 is provided with a mounting hole 306 extending in the horizontal direction, and the abutting annular part 304 is also provided with a mounting groove 307 extending in the horizontal direction. The inner part of the locking bolt 305 can be inserted into the mounting groove 307 through the mounting hole 306 from the outside to the inside, and the screw connection part 303 and the abutting annular part 304 are connected as a whole. Such a structure design can facilitate the repair of the local parts when the local parts are deformed due to metal fatigue or broken. Further, a plurality of mounting grooves 307 can be arranged on the screw connection part 303 from top to bottom. In different driving scenarios, the locking bolt 305 can be inserted into the mounting groove 307 at different heights to adjust the spring preload to the appropriate range, and then the screw thread cooperation structure is rotated to adjust accurately, which greatly reduces the operation burden in the adjustment process and is efficient and convenient.

[0040] It should be noted that the locking bolt 305 for locking and connecting the screw connection part 303 and the abutting annular part 304 needs to have sufficient structural strength, so the material should be made of hard alloy material, such as tungsten-cobalt hard alloy, titanium carbide-based hard alloy, etc.

[0041] The inventor considers that the thread screwing structure is prone to cause the adjustable connecting sleeve 3 to loosen and move downward during long-time high-load repeated compression and elongation of the shock absorber, which causes the stroke of the spring in the vehicle shock absorber to change, affects the ride comfort, and even affects the safety of the vehicle. Therefore, as a preferred structure, the anti-loosening connecting sleeve 5 is arranged below the adjustable connecting sleeve 3 on the outer side of the cylinder body 1, and the inner side of the anti-loosening connecting sleeve 5 is formed with an inner thread opposite in rotation direction to the adjustable connecting sleeve 3. At this time, the anti-loosening connecting sleeve 5 is opposite in rotation direction to the adjustable connecting sleeve 3, so that when the adjustable connecting sleeve 3 loosens and moves downward, the anti-loosening connecting sleeve 5 effectively prevents the adjustable connecting sleeve 3 from loosening and moving downward by the abutting effect of the top surface, thereby avoiding the loosening failure. Further, in order to avoid the end of the reset abutting spring 4 from being laterally offset during the continuous and repeated working process of the vehicle shock absorber, the abutting annular portion 304 and the upper end of the piston rod 2 are respectively provided with an inner limiting annular surface 6 for limiting the lateral sliding of the end of the reset abutting spring 4. In addition, in order to prevent the piston rod 2 from descending too much or the cylinder body 1 from being impacted too much due to the instantaneous pressure of the shock absorber, the inner abutting protection spring 7 is arranged on the outer side of the anti-loosening connecting sleeve 5. Figure 6

[0042] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.​

Claims

1. A vehicle shock absorber capable of high-precision soft / hard adjustment, characterized in that: The application relates to a cylinder (1) and a piston rod (2) which are connected through nesting and mutual cooperation, the piston rod (2) can be lifted and lowered relative to the cylinder (1) in a vertical direction; an outer threaded surface (101) is formed on the outer surface of the cylinder (1), an adjustable connecting sleeve (3) is arranged outside the cylinder (1), an inner threaded surface (301) corresponding to the outer threaded surface (101) is formed on the inner side of the adjustable connecting sleeve (3), the adjustable connecting sleeve (3) can be adjusted relative to the cylinder (1) through rotating movement; an upper abutting surface (201) is formed on the upper end of the piston rod (2), a lower abutting surface (302) is formed on the adjustable connecting sleeve (3), and a reset abutting spring (4) is arranged between the upper abutting surface (201) and the lower abutting surface (302).

2. The shock absorber capable of high-precision soft and hard adjustment for vehicle according to claim 1, characterized in that: A lock connecting sleeve (5) is further arranged below the adjustable connecting sleeve (3) outside the cylinder (1), and an inner thread of the lock connecting sleeve (5) is opposite to that of the adjustable connecting sleeve (3).

3. The shock absorber capable of high-precision soft and hard adjustment for vehicle according to claim 2, characterized in that: The adjustable connecting sleeve (3) comprises a screwing connecting part (303) for connecting with the cylinder (1), an abutting annular part (304) for abutting with the reset abutting spring (4), and a locking bolt (305) for connecting the screwing connecting part (303) with the abutting annular part (304); an installation hole (306) extending in a horizontal direction is formed in the abutting annular part (304), and an installation groove (307) extending in a horizontal direction is also formed in the abutting annular part (304), and the inner side of the locking bolt (305) can be inserted into the installation groove (307) through the installation hole (306) from outside to inside, so that the screwing connecting part (303) and the abutting annular part (304) are connected as a whole.

4. The shock absorber capable of high-precision soft and hard adjustment for vehicle according to claim 3, characterized in that: A plurality of installation grooves (307) are arranged on the screwing connecting part (303) in sequence from top to bottom.

5. The shock absorber capable of high-precision soft and hard adjustment for vehicle according to claim 4, characterized in that: The locking bolt (305) is made of hard alloy material.

6. The shock absorber capable of high-precision soft and hard adjustment for vehicle according to claim 5, characterized in that: Inner limiting annular surfaces (6) for limiting the lateral sliding of the end of the reset abutting spring (4) are further formed on the abutting annular part (304) and the upper end of the piston rod (2).

7. The shock absorber capable of high-precision soft and hard adjustment for vehicle according to claim 6, characterized in that: An inner abutting protection spring (7) is further arranged outside the sleeve.

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