Vibration damper structure capable of rotating linearly

Abstract

The shock absorber structure comprises a cylinder and a motion conversion module, the cylinder is filled with hydraulic oil, the motion conversion module comprises a mandrel inserted into the cylinder, a rotating block in threaded connection with the outer side of the mandrel and a rotating arm arranged on the outer side of the rotating block, and the rotating block is connected with external rotating torque through the rotating arm. The rotating arm is arranged in the barrel and can convert rotating motion of the rotating arm into axial linear motion of the core shaft, a piston is further arranged on the outer side of the core shaft, the piston is located in the barrel and divides the barrel into two cavities, and an anti-deflection mechanism is arranged on the piston and can limit the core shaft to move up and down only in the axial direction of the barrel. According to the shock absorber, linear motion of the shock absorber can be converted into rotary motion through the motion conversion module, the installation space of the shock absorber is greatly reduced, the use scene of the shock absorber is widened, the installation requirements under the conditions of small stroke and large torque are met, and the application range of the shock absorber is greatly widened.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorbers, and particularly to a shock absorber structure for linear-to-rotary conversion. Background Art

[0002] Traditional cylindrical shock absorbers are mostly designed for linear vibration, and the reciprocating movement of the piston rod compresses the hydraulic oil to generate damping. However, in rotary machinery (such as vehicle steering systems and industrial rotary equipment), the rotary vibration energy is difficult to be directly absorbed by traditional shock absorbers, and an additional conversion mechanism needs to be added, resulting in a complex structure and large energy loss. In the prior art, some rotary shock absorbers adopt gear meshing, worm and worm gear or link conversion structures. The clearance and durability of the gears and worm and worm gear are not easy to ensure. The link conversion structure has problems such as large volume, long installation space, excessive stroke, and too small torque, resulting in the inability to install linear shock absorbers in some vehicles with a low chassis or some shock-absorbing parts with a small space. Summary of the Invention

[0003] In view of this, the present invention provides a shock absorber structure for linear-to-rotary conversion, which can convert the linear motion of an ordinary shock absorber into rotary motion by designing a shock absorber structure for linear-to-rotary conversion, so as to meet the installation requirements in some application scenarios with insufficient installation space, small stroke, and large torque.

[0004] To solve the above technical problems, the present invention provides a shock absorber structure for linear-to-rotary conversion, which includes a cylinder body and a motion conversion module. The cylinder body is filled with hydraulic oil. The motion conversion module includes a core shaft inserted into the cylinder body, a rotary block threadedly connected to the outside of the core shaft, and a turning arm arranged on the outside of the rotary block. The rotary block is connected to an external rotary torque through the turning arm and can convert the rotary motion of the turning arm into the axial linear motion of the core shaft. A piston is further arranged on the outside of the core shaft. The piston is located in the cylinder body and divides the cylinder body into two chambers. An anti-deflection mechanism is arranged on the piston, which can limit the core shaft to move only up and down along the axis of the cylinder body. Through the anti-deflection mechanism, under the driving action of an external rotary force, while the turning arm drives the rotary block to rotate, the rotation of the core shaft can be avoided. At the same time, with the limiting effect of the anti-deflection mechanism, the rotation of the turning arm can drive the rotary block to rotate while driving the core shaft threadedly connected to it to move axially up and down, realizing the conversion of the rotary motion of the swing arm into the axial linear motion of the core shaft.

[0005] A sealing structure is further arranged on the cylinder body. The sealing structure includes a base arranged at the lower end of the cylinder body, an oil seal gland one arranged on the base of the cylinder body, a top cover arranged at the upper end of the cylinder body, and an oil seal gland two arranged on the top cover. The present invention can realize the fixed installation and limitation of the upper and lower ends of the cylinder body through the base and the top cover, and can realize the sealing of the top cover through the oil seal gland one and the sealing of the base through the oil seal gland two, greatly improving the sealing performance of the shock absorber.

[0006] The anti-deflection mechanism includes a guide hole formed in the piston. A guide shaft is inserted into the guide hole. The lower end of the guide shaft is connected to the base, and the upper end is connected to the top cover. The present invention can limit the rotation of the piston and the core shaft through the cooperation between the guide shaft and the guide hole, avoiding their rotation. Furthermore, in cooperation with the motion conversion module, the piston drives the core shaft to move up and down along the axis of the core shaft, making the operation more convenient.

[0007] At least two through holes parallel to the axis direction of the piston are formed in the piston, and a reversing valve is arranged in the through hole. The reversing valve is used for exchanging and circulating the hydraulic oil in the two storage cavities. The present invention can exchange the hydraulic oil in the chambers of the cylinders on both the upper and lower sides of the piston through the reversing valve. By converting the rotational motion into the up and down motion of the core shaft, the hydraulic oil in the upper and lower chambers of the inner cavity of the cylinder is exchanged through the one-way valve, changing the volume of the chamber, and thus generating damping, realizing the damping function of the shock absorber.

[0008] There are two through holes, and correspondingly, there are also two reversing valves. The two reversing valves are one-way valves, and the installation positions of the two one-way valves are opposite.

[0009] A trapezoidal external thread is formed on the core shaft, and a trapezoidal internal thread meshing with the trapezoidal external thread is formed on the rotating block.

[0010] A sealing ring is arranged on the outer side of the piston. The sealing ring is made of rubber or polyurethane material resistant to high temperature and high pressure.

[0011] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0012] 1. Reduce the installation space and expand the applicable range. The present invention can convert the rotational motion of the force arm into the linear motion of the core shaft through the motion conversion module, greatly reducing the installation space of the shock absorber and expanding the applicable scenarios of the shock absorber.

[0013] 2. Improve the stability of the up and down movement of the core shaft. The present invention can guide and limit the up and down movement of the core shaft through the anti-deflection mechanism, so that during the rotation of the swing arm, it can only move up and down axially and cannot rotate, greatly improving the damping ability of the shock absorber.

[0014] 3. The hydraulic oil exchange is more convenient and intelligent. The present invention can install the outlets of the two one-way valves in opposite states, realizing the efficient and convenient automatic switching operation of the hydraulic oil in the chambers at both ends of the piston, greatly improving the damping effect and damping stability of the shock absorber, and having a longer service life. Description of the Drawings

[0015] Figure 1Side view of the shock absorber structure for converting linear motion to rotary motion according to the present invention;

[0016] Figure 2 According to the present invention Figure 1 Cross-sectional view taken along line A-A in the present invention;

[0017] Figure 3 Front view of the shock absorber structure for converting linear motion to rotary motion according to the present invention;

[0018] Figure 4 According to the present invention Figure 3 Cross-sectional view taken along line B-B in the present invention.

[0019] Explanation of reference numerals: 100, cylinder body; 200, motion conversion module; 210, core shaft; 211, trapezoidal external thread; 220, rotating block; 221, trapezoidal internal thread; 230, swing arm; 240, piston; 241, sealing ring; 250, anti-deflection mechanism; 251, guide hole; 252, guide shaft; 300, sealing structure; 301, base; 302, first oil seal gland; 303, top cover; 304, second oil seal gland; 400, through hole; 500, reversing valve. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying Figures 1-4 drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention.

[0021] As Figures 1-4 shown: This embodiment provides a shock absorber structure for converting linear motion to rotary motion, including a cylinder body 100 and a motion conversion module 200. The cylinder body 100 is filled with hydraulic oil. Among them, as Figure 2As shown, the cylinder body 100 includes an inner cylinder and an outer cylinder. The motion conversion module 200 includes a mandrel 210 inserted into the cylinder body 100, a rotating block 220 threadedly connected to the outside of the mandrel 210, and a swing arm 230 arranged on the outside of the rotating block 220. A trapezoidal external thread 211 is provided on the mandrel 210, and a trapezoidal internal thread 221 meshing with the trapezoidal external thread 211 is provided on the rotating block 220. The rotating block 220 is connected to an external rotating torque through the swing arm 230, and can convert the rotational motion of the swing arm 230 into the axial linear motion of the mandrel 210. A piston 240 is further arranged on the outside of the mandrel 210, and a sealing ring 241 is arranged on the outside of the piston 240. The sealing ring 241 is made of rubber or polyurethane resistant to high temperature and high pressure. The sealing ring 241 on the outside of the piston 240 can ensure the sealing performance between the outside of the piston 240 and the inner cylinder, and it has good recovery elasticity, so that it can ensure good contact and sealing with the inner wall of the inner cylinder during the up and down movement, greatly improving the service life of the shock absorber. The piston 240 is located inside the cylinder body 100 and divides the cylinder body 100 into two chambers. An anti-deflection mechanism 250 is arranged on the piston 240. The mandrel 210, the piston 240 and the anti-deflection mechanism 250 are all located inside the inner cylinder, and can limit the mandrel 210 to move up and down only along the axis of the cylinder body 100. Through the anti-deflection mechanism 250, under the driving action of an external rotating force, when the swing arm 230 drives the rotating block 220 to rotate, the rotation of the mandrel 210 can be avoided. At the same time, with the limiting effect of the anti-deflection mechanism 250, when the swing arm 230 rotates, it can drive the rotating block 220 to rotate, and drive the mandrel 210 threadedly connected to it to move axially up and down, realizing the conversion of the rotational motion of the swing arm into the axial linear motion of the mandrel 210. The present invention can realize the conversion of the linear motion of the shock absorber into rotational motion through the motion conversion module 200, greatly reducing the installation space of the shock absorber, expanding the application scenarios of the shock absorber, meeting the installation requirements under the conditions of small stroke and large torque, and greatly improving the applicable range of the shock absorber.

[0022] According to an embodiment of the present invention, as Figure 1 and Figure 2As shown, a sealing structure 300 is further provided on the cylinder body 100. The sealing structure 300 includes a base 301 welded to the lower end of the cylinder body 100. An oil seal gland one 302 is provided on the base 301 of the cylinder body 100. The oil seal gland one 302 is used to seal the lower part of the cylinder body 100. A top cover 303 is provided at the upper end of the cylinder body 100. An oil seal gland two 304 is provided on the top cover 303. The oil seal gland two 304 is used to seal the upper part of the cylinder body 100. The present invention can realize the fixed installation and limit of the upper and lower ends of the cylinder body 100 through the base 301 and the top cover 303, and can seal the top cover 303 through the oil seal gland one 302 and seal the base 301 through the oil seal gland two 304, greatly improving the sealing performance of the shock absorber.

[0023] According to another embodiment of the present invention, as Figure 1 and Figure 4 shown, the anti-deflection mechanism 250 includes a guiding hole 251 opened on the piston 240. As Figure 4 shown, there are two guiding holes 251, and a guiding shaft 252 is inserted into each guiding hole 251. The lower end of the guiding shaft 252 is connected to the base 301, and the upper end is connected to the top cover 303. The present invention can limit the rotation of the piston 240 and the core shaft 210 through the cooperation of the guiding shaft 252 and the guiding hole 251, avoiding its rotation, and further cooperating with the motion conversion module 200 to realize the up and down movement of the piston 240 driving the core shaft 210 along the axis direction of the core shaft 210, making the operation more convenient.

[0024] According to another embodiment of the present invention, as Figure 1 and Figure 2 shown, at least two through holes 400 parallel to the axis direction of the piston 240 are opened on the piston 240, and a reversing valve 500 is arranged in the through holes 400. The reversing valve 500 is a pressure one-way control valve in the prior art. The reversing valve 500 is used to exchange and circulate the hydraulic oil in the two storage cavities. The present invention can exchange the hydraulic oil in the chambers of the cylinder body 100 on the upper and lower sides of the piston 240 through the reversing valve 500, convert the rotational motion into the up and down movement of the core shaft 210, realize the exchange of the hydraulic oil in the upper and lower two chambers of the inner cavity of the cylinder body 100 through the one-way valve, change the volume of the chamber, and thus generate damping, realizing the damping function of the shock absorber.

[0025] As Figure 2 shown, there are two through holes 400, and correspondingly there are two reversing valves 500. The two reversing valves 500 are one-way valves, and the installation positions of the two one-way valves are opposite.

[0026] The usage method of the present invention:

[0027] First of all, it should be clear that the shock absorber involved in the present invention is mainly used in various vehicles and other scenarios that require shock absorption, especially suitable for scenarios with limited installation space, low chassis and the need for shock absorption. The present invention takes the shock absorption of a sedan during movement as an example to elaborate on its usage method in detail. When shock absorption is required during the movement of a vehicle, the shock absorption principle of this shock absorber is as follows: Due to the inertial effect existing in the movement between the vehicle body and the power system during the movement of the vehicle, the swing arm of the shock absorber will be pushed to rotate. When the swing arm of the shock absorber rotates, it will drive the rotating block 220 to rotate together. Coupled with the thread fit between the trapezoidal internal thread 221 provided on the rotating block 220 and the trapezoidal external thread 211 provided on the core shaft 210, and the combined action of the guiding shaft 252 guiding and limiting the piston 240, the rotation of the rotating block 220 will be converted into the core shaft 210 pulling the piston 240 to move up and down. During this process, the hydraulic oil in the cylinder 100 will be exchanged between the upper and lower spaces in the inner cylinder chamber through the one-way valve on the piston 240, achieving a good shock absorption effect for the vehicle;

[0028] The following briefly elaborates on the realization of the shock absorption function for several different installation methods of this shock absorber: There are two installation methods for the shock absorber. The first is the horizontal installation of the swing arm. At this time, the shock absorber is mainly used to attenuate the vibration in the up and down direction, mainly for shock absorption of the bumps when the vehicle is driving on a bumpy road. The second is the vertical installation of the swing arm. At this time, the shock absorber is mainly used to attenuate the lag effect existing between the movement of the vehicle frame and the chassis due to inertia in the front and rear directions during acceleration, deceleration or braking of the vehicle, thereby achieving a good shock absorption effect. In summary, generally on a vehicle, multiple such shock absorbers will be installed, and their installation methods need to be adaptively set according to different shock absorption requirements of the vehicle. By changing the installation method, the corresponding shock absorption requirements can be achieved;

[0029] The present invention can realize the conversion of the linear motion of an ordinary shock absorber into rotational motion through the shock absorber structure of linear-to-rotational conversion, which can meet the installation requirements in various installation scenarios, especially in the case of insufficient installation space, small stroke and large torque, so as to meet the shock absorption requirements under various working conditions.

[0030] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A linear-rotating shock absorber structure, characterized in that: The invention comprises a cylinder (100) and a motion conversion module (200), wherein the cylinder (100) is filled with hydraulic oil, and the motion conversion module (200) comprises a core shaft (210) inserted into the cylinder (100), a rotating block (220) threadedly connected to the outside of the core shaft (210), and a rotating arm (230) arranged on the outside of the rotating block (220), wherein the rotating block (220) is connected to an external rotation torque through the rotating arm (230) and can convert the rotational motion of the rotating arm (230) into an axial linear motion of the core shaft (210), and a piston (240) is further arranged on the outside of the core shaft (210), wherein the piston (240) is located in the cylinder (100) and divides the cylinder (100) into two chambers, and an anti-deflection mechanism (250) is arranged on the piston (240) and can limit the core shaft (210) to move up and down only along the axial direction of the cylinder (100).

2. The linear-rotational vibration damper structure according to claim 1, characterized in that: The cylinder (100) is also provided with a sealing structure (300), the sealing structure (300) comprising a base (301) arranged at the lower end of the cylinder (100), an oil seal pressure cover (302) being arranged on the base (301) of the cylinder (100), a top cover (303) being arranged at the upper end of the cylinder (100), and an oil seal pressure cover (304) being arranged on the top cover (303).

3. The linear-rotational vibration damper structure according to claim 2, characterized in that: The anti-deflection mechanism (250) comprises a guide hole (251) formed on the piston (240), a guide shaft (252) being inserted into the guide hole (251), the lower end of the guide shaft (252) being connected to the base (301), and the upper end of the guide shaft (252) being connected to the top cover (303).

4. The linear-rotational vibration damper structure according to claim 3, characterized in that: The piston (240) is provided with at least two through holes (400) parallel to the axial direction thereof, and a reversing valve (500) is arranged in the through hole (400). The reversing valve (500) is used for exchanging and circulating the hydraulic oil in the two storage chambers.

5. The linear-rotational vibration absorber structure according to claim 4, characterized in that: There are two through holes (400), and correspondingly there are also two reversing valves (500). The two reversing valves (500) are one-way valves, and the installation positions of the two one-way valves are opposite.

6. The linear-rotational vibration damper structure according to claim 5, characterized in that: The core shaft (210) is provided with a trapezoidal external thread (211), and the rotating block (220) is provided with a trapezoidal internal thread (221) meshing with the trapezoidal external thread (211).

7. The linear-rotational vibration damper structure according to claim 1, characterized in that: A sealing ring (241) is provided on the outer side of the piston (240).

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