Shock absorber with energy recovery function

Abstract

A shock absorber with an energy recovery function comprises a main shell, a piston device, a spiral device and a power generation device, the spiral device and the power generation device are arranged in the main shell, the piston device can do linear motion in the main shell, and the spiral device can do linear motion in the main shell. The spiral device is used for converting linear motion of the piston device into rotary motion, and the power generation device is used for converting rotary motion of the spiral device into electric energy. Through the piston device and the main shell which can move relatively, the spiral device capable of converting motion forms and the power generation device capable of converting energy forms, road surface excitation kinetic energy in the running process of an automobile is converted into electric energy, the endurance of the whole automobile is effectively improved, meanwhile, energy waste during working of the shock absorber is avoided, and the service life of the shock absorber is prolonged. And the heat dissipation performance of the shock absorber is indirectly improved.

Description

Technical Field

[0001] The invention relates to the field of automobile shock absorbers, and in particular to a shock absorber with an energy recovery function. Background Art

[0002] Shock absorbers usually generate a lot of heat when working, so hydraulic shock absorbers can also be roughly regarded as an energy conversion device, which can absorb road excitation and convert it into the kinetic energy of the piston. When the piston works, it converts the kinetic energy into damping force and a lot of heat. The damping force is used to eliminate the impact force generated when the vehicle is driving on bumpy roads, improving the comfort and stability of the vehicle, while the heat will dissipate into the atmosphere. In other words, a lot of energy is wasted in this process.

[0003] On the other hand, the current traditional shock absorbers dissipate heat through direct contact with the outside air through the cylinder wall. This type of solution has limited heat dissipation and depends on the external environment. If the outside temperature is high, or the cylinder wall cannot be lowered to a temperature below the outside temperature, the shock absorber will be in a high-temperature working environment for a long time, which will lead to its performance degradation. More seriously, it will cause non-metallic components to burn, resulting in oil leakage, shock absorber failure and other problems. Summary of the invention

[0004] The present invention provides a shock absorber with energy recovery function, comprising a main housing, a piston device, a spiral device and a power generation device, wherein the spiral device and the power generation device are arranged in the main housing, the piston device can perform linear motion in the main housing, the spiral device is arranged to convert the linear motion of the piston device into rotational motion, and the power generation device is arranged to convert the rotational motion of the spiral device into electrical energy.

[0005] Furthermore, the piston device includes an upper connecting seat and a damping piston rod, wherein the upper connecting seat is arranged above the main housing and is fixedly connected to the upper part of the damping piston rod as a whole, and the lower part of the damping piston rod is arranged in the main housing and can perform linear motion in the main housing.

[0006] Furthermore, the piston device also includes a limit ring, which is circumferentially protruded on the lower part of the damping piston rod and fixedly connected to the damping piston rod as a whole. The limit ring can make linear motion in the main housing along with the damping piston rod. The limit ring can limit the upward movement stroke of the damping piston rod by abutting against the oil seal on the top of the main housing.

[0007] Furthermore, the piston device also includes a buffer block and a dust cover, the buffer block is sleeved on the upper part of the damping piston rod and is fixedly connected to the upper connecting seat as a whole, the upper end of the dust cover is connected to the upper connecting seat, and the lower end of the dust cover is connected to the main shell body, and the dust cover is used to circumferentially cover the upper part of the damping piston rod, the buffer block, and the top of the main shell body.

[0008] Furthermore, it also includes a wire portion, which is electrically connected to the piston device and is used to transmit the electric energy generated by the power generation device to the power battery and / or the electrical device.

[0009] Furthermore, the spiral device includes a torsion bar guide and a torsion bar body, the torsion bar guide is arranged on the inner wall of the damping piston rod and can make linear motion in the main housing along with the damping piston rod, the upper part of the torsion bar body is arranged in the damping piston rod, the torsion bar body is rotationally matched with the torsion bar guide, and the torsion bar body can rotate under the drive of the linear motion of the torsion bar guide.

[0010] Furthermore, the power generation device includes a magnet and a coil, the magnet is arranged on the inner wall of the main shell, the coil is arranged on the spiral device and can rotate with the spiral device, and the coil is used to cut the magnetic flux lines of the magnet to generate current.

[0011] Furthermore, the spiral device also includes a torsion bar base, which is arranged below the torsion bar body and fixedly connected to the lower part of the torsion bar body as a whole, and the coil is wound on the torsion bar base.

[0012] Furthermore, it also includes a bottom valve part and a bearing part, the bottom valve part is arranged at the bottom end of the main shell and is fixedly connected to the main shell as a whole, the bearing part is used to connect the bottom valve part and the spiral device, and the spiral device rotates relative to the bottom valve part through the bearing part.

[0013] Furthermore, it also includes a lower connecting seat, which is used to connect to the wheel, and the upper connecting seat is used to connect to the vehicle body. The lower connecting seat is arranged below the main shell and is fixedly connected to the main shell as a whole.

[0014] The shock absorber with energy recovery function provided by the present invention converts the road excitation kinetic energy during the driving process of the vehicle into electrical energy through a piston device and a main housing that can move relatively, a spiral device that can convert the motion form, and a power generation device that can convert the energy form, which effectively improves the endurance of the whole vehicle, and also avoids the energy waste of the shock absorber during operation, and indirectly improves the heat dissipation performance of the shock absorber. In addition, the power transmission route in the present invention is simplified, avoiding the need to set up additional lines in the shock absorber, and has good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a shock absorber with energy recovery function provided by the present invention.

[0016] Figure 2 It is a schematic diagram of the damping piston rod and the torsion bar body in the present invention.

[0017] Figure 3 It is a schematic diagram of the bottom valve part and the bearing part in the present invention. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the present invention is described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0019] It should be noted that the terms "first", "second", "third", "fourth", etc. in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0020] See also Figure 1The shock absorber with energy recovery function provided by the present invention is arranged between the vehicle body and the wheel, more specifically, between the vehicle body sheet metal and the steering knuckle. The shock absorber with energy recovery function provided by the present invention comprises a main housing 1, a piston device 2, a spiral device 3 and a generator 4. The main housing 1 is used to connect with the wheel, the spiral device 3 and the generator 4 are arranged in the main housing 1, the piston device 2 is used to connect with the vehicle body, and the piston device 2 can make linear motion in the main housing 1, the spiral device 3 is used to convert the linear motion of the piston device 2 into rotational motion, and the generator 4 is used to convert the rotational motion of the spiral device 3 into electrical energy. Specifically, in this embodiment, the upper part of the piston device 2 is connected to the vehicle body sheet metal, the lower part of the main housing 1 is provided with a lower connecting seat 11, the lower connecting seat 11 is fixedly connected to the main housing 1 as a whole, and the lower connecting seat 11 is provided with a lifting lug for connecting with the steering knuckle; the spiral device 3 and the generator 4 are both arranged in the main housing 1. It is easy to understand that when the car is bumpy, the wheel side and the vehicle body side will produce relative motion, so that the piston device 2 makes linear motion in the main housing 1. The closer the vehicle body side and the wheel side are, the more the piston device 2 extends into the main housing 1, the smaller the distance between the piston device 2 and the spiral device 3 and the generator 4, and the corresponding shock absorber is in a compressed state; the farther the vehicle body side and the wheel side are, the less the piston device 2 extends into the main housing 1, the larger the distance between the piston device 2 and the spiral device 3 and the generator 4, and the corresponding shock absorber is in a stretched state. In particular, the main housing 1 in the present invention is an insulating member, and the main parts of the piston device 2 and the spiral device 3 are both metal members, so the electric energy generated by the generator 4 can be transmitted to the corresponding power storage element, such as a rectifier or a power battery, with the spiral device 3 and the piston device 2 as conductors. In a preferred embodiment of the present invention, the main housing 1 and the piston device 2 are suitable for a cylinder shock absorber, so the linear motion of the piston device 2 in the main housing 1 is essentially the axial motion of the piston device 2 along the main housing 1. The shock absorber with energy recovery function in the present invention converts the road excitation kinetic energy during the driving of the car into electrical energy through a piston device 2 and a main shell 1 that can move relatively, a spiral device 3 that can convert the motion form and a power generation device 4 that can convert the energy form, thereby effectively improving the cruising range of the whole vehicle, while also avoiding energy waste when the shock absorber is working, and indirectly improving the heat dissipation performance of the shock absorber.

[0021] Please also read Figure 2Furthermore, the piston device 2 in the present invention includes an upper connecting seat 22, a buffer block 23, a dust cover 24 and a damping piston rod 21. The upper connecting seat 22 is used to connect with the vehicle body. The upper connecting seat 22 is arranged above the main housing 1 and is fixedly connected to the upper part of the damping piston rod 21 as a whole. The buffer block 23 is sleeved on the upper part of the damping piston rod 21 and is fixedly connected to the upper connecting seat 22 as a whole. The upper end of the dust cover 24 is connected to the upper connecting seat 22, and the lower end of the dust cover 24 is connected to the main housing 1. The lower part of the damping piston rod 21 is arranged in the main housing 1 and can make a linear motion in the main housing 1. Specifically, the upper connecting seat 22 is connected to the body sheet metal as a whole by bolts, and the dust cover 24 circumferentially covers the upper part of the shock-absorbing piston rod 21, the buffer block 23, and the top of the main shell 1, and can be compressed or stretched with the relative movement between the top of the main shell 1 and the shock-absorbing piston rod 21; the buffer block 23 is used to provide a certain buffering force when the shock absorber is compressed, and at the same time, it can also be against the top of the main shell 1 when the shock absorber is compressed to a certain extent, preventing the shock absorber from further compression, thereby limiting the stroke of the shock absorber when compressed; the shock-absorbing piston rod 21 can convert the movement of the body side relative to the wheel side when the road is bumpy into the linear movement of the shock-absorbing piston rod 21 itself in the main shell 1. When the body side and the wheel side are relatively close, the lower part of the shock-absorbing piston rod 21 descends in the main shell 1, and the distance between it and the spiral device 3 and the generator 4 is shortened; when the body side and the wheel side are relatively far away, the lower part of the shock-absorbing piston rod 21 ascends in the main shell 1, and the distance between it and the spiral device 3 and the generator 4 is lengthened. In this embodiment, the piston device 2 also includes a limit ring 211, which is circumferentially protruded on the lower part of the damping piston rod 21 and is fixedly connected to the damping piston rod 21 as a whole. The limit ring 211 can make a linear motion in the main housing 1 along with the damping piston rod 21. When the damper is stretched to a certain extent, the limit ring 211 can abut against the oil seal 25 on the top of the main housing 1 to prevent the damping piston rod 21 from further ascending in the main housing 1, thereby preventing the damper from further stretching.

[0022] Furthermore, the spiral device 3 in the present invention includes a torsion bar guide 31 and a torsion bar body 32. The torsion bar guide 31 is arranged on the inner wall of the damping piston rod 21 and can make linear motion in the main housing 1 with the damping piston rod 21. The upper part of the torsion bar body 32 is arranged in the damping piston rod 21. The torsion bar body 32 is rotationally coordinated with the torsion bar guide 31, and the torsion bar body 32 can rotate under the drive of the linear motion of the torsion bar guide 31. Specifically, in the present embodiment, the torsion bar guide 31 is a spiral protrusion convexly provided on the inner wall of the damping piston rod 21, and a spiral groove is concavely provided on the outer wall of the corresponding torsion bar body 32. The upper part of the torsion bar body 32 is arranged in the damping piston rod 21 and forms a spiral fit with the torsion bar guide 31 in the damping piston rod 21. The lower part of the torsion bar body 32 is fixed in the main housing 1 and can rotate relative to the main housing 1. Therefore, when the damping piston rod 21 makes a linear motion in the main housing 1, the torsion bar body 32 will rotate clockwise or counterclockwise under the drive of the torsion bar guide 31 in the damping piston rod 21. For example: when the shock absorber is compressed, the damping piston rod 21 moves downward in the main housing 1, and the torsion bar body 32 rotates clockwise under the drive of the torsion bar guide 31. When the shock absorber is stretched, the damping piston rod 21 moves upward in the main housing 1, and the torsion bar body 32 rotates counterclockwise under the drive of the torsion bar guide 31. In other preferred embodiments of the present invention, the relative concave-convex relationship between the torsion bar guide 31 and the torsion bar body 32 can be interchanged, for example: the torsion bar guide 31 can be set as a groove inside the damping piston rod 21, and the torsion bar body 32 can be correspondingly set as a screw with a protruding thread. It is easy to understand that there is no specific limitation on the thread direction between the torsion bar guide 31 and the torsion bar body 32. In other embodiments of the present invention, the thread direction between the torsion bar guide 31 and the torsion bar body 32 can be set as: when the shock absorber is compressed, the damping piston rod 21 moves downward relative to the main housing 1, and the torsion bar body 32 rotates counterclockwise driven by the torsion bar guide 31, and when the shock absorber is stretched, the torsion bar body 32 rotates clockwise accordingly.

[0023] Please also refer to Figure 3The power generation device 4 in the present invention includes a magnet 41 and a coil 42. The magnet 41 is arranged on the inner wall of the main housing 1. The coil 42 is arranged on the spiral device 3 and can rotate with the spiral device 3. The coil 42 is used to cut the magnetic flux lines of the magnet 41 to generate current. Specifically, in this embodiment, the coil 42 is wound on the torsion bar base 33 at the lower end of the torsion bar body 32. The circumferential size of the torsion bar base 33 is larger than the circumferential size of the torsion bar body 32. The magnet 41 is an annular magnet. The size of the magnet 41 in the axial direction of the main housing 1 is greater than or equal to the size of the torsion bar base 33 in the axial direction of the main housing 1. It is easy to understand that when the torsion bar body 32 rotates driven by the torsion bar guide 31, no matter whether the coil 42 rotates clockwise or counterclockwise driven by the torsion bar base 33, the coil 42 can cut the magnetic flux lines of the magnet 41 to generate current. Therefore, the spiral device 3 and the power generation device 4 in the present invention can generate current when the shock absorber is compressed or stretched.

[0024] Furthermore, the shock absorber with energy recovery function in the present invention further includes a bottom valve portion 34 and a bearing portion 35. The bottom valve portion 34 is arranged at the bottom end of the main housing 1 and is fixedly connected to the main housing 1 as a whole. The bearing portion 35 is used to connect the bottom valve portion 34 and the spiral device 3. The spiral device 3 rotates relative to the bottom valve portion 34 through the bearing portion 35. Specifically, in the present embodiment, the bearing portion 35 is divided into an inner ring and an outer ring that can rotate relatively. The inner ring of the bearing portion 35 is sleeved on the top of the bottom valve portion 34, and the outer ring of the bearing portion 35 is embedded in the bottom of the torsion bar base 33. The torsion bar base 33 is arranged below the torsion bar body 32 and is fixedly connected to the lower part of the torsion bar body 32 as a whole. Therefore, the torsion bar base 33 can rotate relative to the bottom valve portion 34 under the drive of the torsion bar body 32. The present invention fixes the spiral device 3 in the main housing 1 in the axial direction through the bottom valve portion 34 and the bearing portion 35, so that the spiral device 3 can rotate in the main housing 1 without axially moving with the stretching and compression of the shock absorber, and the structure is simple and durable.

[0025] In particular, the shock absorber with energy recovery function in the present invention also includes a wire portion 5, which is electrically connected to the piston device 2, and the wire portion 5 can be used to transmit the electric energy generated by the power generation device 4 to the power battery and / or the electrical device. Specifically, in the present embodiment, the wire portion 5 is connected to the damping piston rod 21. Since the coil 42, the torsion bar base 33, the torsion bar body 32 and the damping piston rod 21 are all metal parts, and the main shell 1 is an insulating part, the current generated by the coil 42 cutting the magnetic flux line can be transmitted along the coil 42, the torsion bar base 33, the torsion bar body 32 and the damping piston rod 21 in sequence, and finally transmitted to the wire portion 5 located in the upper connecting seat 22. The wire portion 5 can be set to be electrically connected to the power battery in the car, and can also be set to be electrically connected to the relevant electrical devices in the car. The present invention transmits the generated electric energy through the metal coil 42, the torsion bar base 33, the torsion bar body 32 and the damping piston rod 21 and the insulating main shell 1, avoiding the additional arrangement of lines in the shock absorber, and having good economic benefits.

[0026] In summary, the shock absorber with energy recovery function provided by the present invention converts the road excitation kinetic energy during the driving process of the car into electrical energy through a piston device and a main housing that can move relatively, a spiral device that can convert the motion form, and a power generation device that can convert the energy form, which effectively improves the endurance of the whole vehicle, and also avoids the energy waste of the shock absorber during operation, and indirectly improves the heat dissipation performance of the shock absorber. In addition, the power transmission route in the present invention is simplified, avoiding the need to set up additional lines in the shock absorber, and has good economic benefits.

[0027] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A shock absorber with energy recovery function, characterized in that: The invention comprises a main housing (1), a piston device (2), a screw device (3) and a power generation device (4); the screw device (3) and the power generation device (4) are arranged in the main housing (1); the piston device (2) can perform linear motion in the main housing (1); the screw device (3) is arranged to convert the linear motion of the piston device (2) into rotational motion; and the power generation device (4) is arranged to convert the rotational motion of the screw device (3) into electrical energy.

2. The shock absorber with energy recovery function according to claim 1, characterized in that: The piston device (2) comprises an upper connecting seat (22) and a damping piston rod (21); the upper connecting seat (22) is arranged above the main housing (1) and is integrally connected to the upper portion of the damping piston rod (21); the lower portion of the damping piston rod (21) is arranged in the main housing (1) and is capable of performing linear motion in the main housing (1).

3. The shock absorber with energy recovery function according to claim 2, characterized in that: The piston device (2) further comprises a limit ring (211), the limit ring (211) being convexly arranged on the lower part of the vibration-damping piston rod (21) along the circumferential direction and being fixedly connected to the vibration-damping piston rod (21) as a whole, the limit ring (211) being able to perform linear motion in the main housing (1) along with the vibration-damping piston rod (21), and the limit ring (211) being able to limit the upward movement stroke of the vibration-damping piston rod (21) by abutting against an oil seal (25) at the top of the main housing (1).

4. The shock absorber with energy recovery function according to claim 2, characterized in that: The piston device (2) further comprises a buffer block (23) and a dust cover (24); the buffer block (23) is sleeved on the upper part of the damping piston rod (21) and is integrally connected to the upper connecting seat (22); the upper end of the dust cover (24) is connected to the upper connecting seat (22); the lower end of the dust cover (24) is connected to the main housing (1); the dust cover (24) is used to circumferentially cover the upper part of the damping piston rod (21), the buffer block (23), and the top of the main housing (1).

5. The shock absorber with energy recovery function according to claim 1, characterized in that: It also comprises a wire portion (5), the wire portion (5) being electrically connected to the piston device (2), and the wire portion (5) being used to transmit the electric energy generated by the power generation device (4) to a power battery and / or an electric device.

6. The shock absorber with energy recovery function according to claim 1, characterized in that: The spiral device (3) comprises a torsion bar guide (31) and a torsion bar body (32); the torsion bar guide (31) is arranged on the inner wall of the damping piston rod (21) and can move linearly in the main housing (1) along with the damping piston rod (21); the upper part of the torsion bar body (32) is arranged in the damping piston rod (21); the torsion bar body (32) is rotationally matched with the torsion bar guide (31); the torsion bar body (32) can rotate under the drive of the linear motion of the torsion bar guide (31).

7. The shock absorber with energy recovery function according to claim 6, characterized in that: The power generation device (4) comprises a magnet (41) and a coil (42); the magnet (41) is arranged on the inner wall of the main housing (1); the coil (42) is arranged on the spiral device (3) and can rotate with the spiral device (3); the coil (42) is used to cut the magnetic flux lines of the magnet (41) to generate current.

8. The shock absorber with energy recovery function according to claim 7, characterized in that: The spiral device (3) also includes a torsion bar base (33), which is arranged below the torsion bar body (32) and is fixedly connected to the lower part of the torsion bar body (32) as a whole, and the coil (42) is wound on the torsion bar base (33).

9. The shock absorber with energy recovery function according to claim 1, characterized in that: It also includes a bottom valve portion (34) and a bearing portion (35), wherein the bottom valve portion (34) is arranged at the bottom end of the main housing (1) and is fixedly connected to the main housing (1) as a whole, and the bearing portion (35) is used to connect the bottom valve portion (34) and the spiral device (3), and the spiral device (3) rotates relative to the bottom valve portion (34) via the bearing portion (35).

10. The shock absorber with energy recovery function according to claim 1, characterized in that: It also comprises a lower connecting seat (11), the lower connecting seat (11) being used to connect to the wheel, the upper connecting seat (22) being used to connect to the vehicle body, the lower connecting seat (11) being arranged below the main housing (1) and being fixedly connected to the main housing (1) as a whole.

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