A damping-adjustable vibration energy recovery device based on helical planetary gear transmission

Abstract

The application discloses a damping-adjustable vibration energy recovery device based on a spiral planetary gear transmission, which comprises a damper, a motor cover, an output shaft and a planetary gear mechanism. The damper comprises a damper cylinder, a piston and a piston rod. The piston is arranged in the damper cylinder and can move axially along the damper cylinder. The piston rod is fixedly connected to the piston. The motor cover is fixedly sleeved on the damper cylinder. The output shaft is rotatably arranged in the motor cover and is connected to the piston rod. The output shaft can be driven to rotate when the piston rod moves axially along the damper cylinder. The planetary gear mechanism comprises a sun gear, a plurality of planetary gears, a planet carrier and a ring gear. The sun gear is fixedly connected to the output shaft. A first motor is fixedly arranged in the motor cover. A motor shaft of the first motor is fixedly connected to the planet carrier. A plurality of motor shaft gears are respectively engaged with the ring gear. A plurality of second motors are fixedly arranged in the motor cover and are arranged in one-to-one correspondence with the motor shaft gears. Motor shafts of the second motors are fixedly connected to the motor shaft gears.

Description

Technical Field

[0001] The present invention belongs to the technical field of vibration absorber energy recovery, and in particular relates to a vibration energy recovery device with adjustable damping based on helical planetary gear transmission. Background Art

[0002] Shock absorbers are used to dampen oscillations caused by spring rebound after absorbing vibrations, as well as road impacts. They are widely used in automobiles to accelerate the attenuation of frame and body vibrations, thereby improving the vehicle's ride smoothness. Both the compression and extension strokes of the shock absorber are accompanied by the up-and-down motion of the piston rod, generating energy. Traditional shock absorbers generally lack energy recovery devices, with only a few equipped with them. However, existing energy recovery devices require extensive mechanical structures external to the shock absorber, taking up considerable space and making installation difficult. Summary of the Invention

[0003] The purpose of the present invention is to provide a vibration energy recovery device with adjustable damping based on a helical planetary gear transmission, which is arranged along the axial direction of the shock absorber, occupies a small space, and is easy to install; it can utilize the speed ratio characteristics of the planetary gear mechanism to fully recover all the energy in the compression stroke and extension stroke of the shock absorber.

[0004] The technical solution provided by the present invention is:

[0005] A vibration energy recovery device with adjustable damping based on a helical planetary gear transmission, comprising:

[0006] a shock absorber comprising a shock absorber cylinder, a piston, and a piston rod;

[0007] Wherein, the piston is arranged in the shock absorber cylinder and can move axially along the shock absorber cylinder; the piston rod is coaxially fixedly connected to the piston;

[0008] A motor cover, which is fixedly sleeved on the shock absorber cylinder;

[0009] an output shaft rotatably disposed in the motor cover and connected to the piston rod; when the piston rod moves along the axial direction of the shock absorber cylinder, the output shaft can be driven to rotate;

[0010] A planetary gear mechanism comprising: a sun gear, a plurality of planetary gears, a planet carrier and a ring gear;

[0011] Wherein, the sun gear is fixedly connected to the output shaft;

[0012] a first motor, which is fixedly disposed in the motor cover, and a motor shaft of the first motor is fixedly connected to the planet carrier;

[0013] a plurality of motor shaft gears, which are respectively engaged with the ring gear;

[0014] A plurality of second motors are fixedly arranged in the motor cover and are arranged in one-to-one correspondence with the motor shaft gears; the motor shaft of the second motor is fixedly connected with the motor shaft gear.

[0015] Preferably, a threaded hole is coaxially arranged at one end of the piston rod; an external thread is arranged at one end of the output shaft and is matched and connected in the threaded hole.

[0016] Preferably, an output shaft bearing is arranged on the output shaft and is axially fixed in the motor cover through the output shaft bearing.

[0017] Preferably, a limiting boss is arranged on the output shaft, and the limiting boss is located between the output shaft bearing and the sun gear.

[0018] Preferably, a ring gear bearing is arranged on the ring gear and is axially fixed in the motor cover through the ring gear bearing.

[0019] Preferably, the output shaft bearing is a cylindrical roller bearing; and the ring gear bearing is a sliding bearing.

[0020] Preferably, the plurality of motor shaft gears are arranged on the inner side of the ring gear and are uniformly spaced along the inner circumference of the ring gear.

[0021] Preferably, the motor cover comprises a first cover body, a second cover body and a motor cover cover.

[0022] The first cover body and the second cover body are arranged along the axial direction of the output shaft and are oppositely arranged on both sides of the output shaft; the first cover body is detachably fixedly connected with the second cover body; and the motor cover cover is detachably connected with one end of the first cover body and the second cover body.

[0023] Preferably, the first cover body and the second cover body are connected through bolts.

[0024] Preferably, one end of the piston rod, on which a threaded hole is arranged, is located in the shock absorber cylinder, and one end of the output shaft is inserted into the shock absorber cylinder and connected with the piston rod.

[0025] Preferably, the other end of the piston rod extends to the outside of the shock absorber cylinder and is sleeved with a dust cover; and the dust cover is fixedly connected with the piston rod.

[0026] The present application has the following beneficial effects:

[0027] The application provides a damping-adjustable vibration energy recovery device based on helical planetary gear transmission, which focuses on energy recovery of a suspension system, is improved on the basis of a traditional cylinder shock absorber, converts up and down movement of a shock absorber piston and a piston rod into rotary movement of a motor shaft through a screw pair, and realizes efficient use of energy, so that the energy-saving, emission-reducing and green environmental protection goals are achieved.

[0028] The damping-adjustable vibration energy recovery device based on helical planetary gear transmission provided by the application recovers energy through multiple motors; in the working process, the planetary gear mechanism can realize the self-provided characteristics of reverse transmission, the working conditions of the first motor and the second motor are controlled, the damping produced when the motor generates electricity is fully utilized to realize the damping adjustability of the shock absorber, and the comfort of the vehicle is improved.

[0029] The damping-adjustable vibration energy recovery device based on helical planetary gear transmission provided by the application is arranged along the axial direction of the shock absorber, occupies a small space, and is convenient to install. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is an internal structure diagram of the damping-adjustable vibration energy recovery device based on helical planetary gear transmission.

[0031] Figure 2 It is a structure diagram of the shock absorber cylinder and the output shaft.

[0032] Figure 3 It is a structure diagram of the piston rod and the output shaft.

[0033] Figure 4 It is a structure diagram of the planet carrier and the first motor.

[0034] Figure 5 It is a structure diagram of one end of the shock absorber cylinder.

[0035] Figure 6 It is a structure diagram of the other end of the shock absorber cylinder.

[0036] Figure 7 It is a structure diagram of the motor cover and the shock absorber cylinder.

[0037] Figure 8 It is an external structure diagram of the damping-adjustable vibration energy recovery device based on helical planetary gear transmission. DETAILED DESCRIPTION

[0038] The application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement the application according to the description.

[0039] As shown in the drawings, the application provides a damping-adjustable vibration energy recovery device based on helical planetary gear transmission, mainly comprising a shock absorber, a motor cover 110, an output shaft 120, a planetary gear mechanism, a first motor 140, a motor shaft gear 150 and a second motor 160. The planetary gear mechanism comprises a sun gear 131, a plurality of planetary gears 132, a planet carrier 133 and a ring gear 134. Figures 1-8 The shock absorber mainly comprises a shock absorber cylinder 210, a piston 220 and a piston rod 230. The piston 220 is arranged in the shock absorber cylinder 210 and can move axially along the shock absorber cylinder 210; the piston rod 230 is coaxially fixedly connected to the piston 220. The shock absorber cylinder 210 is coaxially provided with a first through hole 210a and a second through hole 210b at two ends thereof, respectively; one end of the piston rod 230 is located in the shock absorber cylinder 210 and the other end extends to the outside of the shock absorber cylinder 210 through the first through hole 210a. The shock absorber cylinder 210 is provided with a circular annular shoulder 211 at one end thereof, and the shoulder 211 is arranged at the same end of the shock absorber cylinder 210 as the second through hole 210b. The motor cover 110 is sleeved on the end of the shock absorber cylinder 210 provided with the shoulder 211, and the shock absorber cylinder 210 is fixed in the motor cover 110 through the shoulder 211. As a preferred, the shock absorber is further provided with a dust cover 240, which is sleeved on the end of the piston rod 230 extending to the outside of the shock absorber cylinder 210; and the dust cover 240 is fixedly connected to the end of the piston rod 230. The dust cover 240 is also sleeved on the end of the shock absorber cylinder 210 provided with the first through hole 210a and can move axially relative to the shock absorber cylinder 210. By arranging the dust cover 240, the components of the shock absorber can be protected, and the connection of the shock absorber with the vehicle is facilitated. The shock absorber used in the application has the same principle as the hydraulic shock absorber commonly used in the prior art, which will not be described here.

[0040]

[0041] ​The output shaft 120 is rotatably arranged in the motor cover 110 and connected with the piston rod 230; the output shaft 120 can be driven to rotate when the piston rod 230 moves along the axial direction of the shock absorber cylinder 210. The sun gear 131 is coaxially fixedly connected on the output shaft 120. A plurality of planetary gears 132 are arranged around the sun gear 131 and respectively mesh with the sun gear 131. The first motor 140 is fixedly arranged in the motor cover 110, and the motor shaft of the first motor 140 is fixedly connected with the planet carrier 133. A plurality of motor shaft gears 150 are arranged on the inner side of the ring gear 134 and respectively mesh with the ring gear 134. A plurality of second motors 160 are fixedly arranged in the motor cover 110 and correspondingly arranged with the motor shaft gears 150; the motor shaft of the second motor 160 is fixedly connected with the motor shaft gear 110. Among them, the motor shaft of the first motor 140 is provided with a first motor shaft bearing, and is axially fixed in the motor cover 110 through the first motor shaft bearing; the motor shaft of the second motor 160 is provided with a second motor shaft bearing, and is axially fixed in the motor cover 110 through the second motor shaft bearing. A ring gear brake mechanism and a planet carrier brake mechanism are respectively arranged in the motor cover 110, the ring gear brake mechanism is used to brake the ring gear 134, and the planet carrier brake is used to brake the planet carrier 133. Among them, the ring gear brake mechanism and the planet carrier brake mechanism can all adopt clutches. When the ring gear brake mechanism is separated from the ring gear 134, the ring gear 134 rotates with the planetary gear 132; when the ring gear brake mechanism is engaged with the ring gear 134, the ring gear 134 stops rotating. When the planet carrier brake mechanism is separated from the planet carrier 133, the planet carrier 133 rotates under the drive of the planetary gear 132; when the planet carrier brake mechanism is engaged with the planet carrier 133, the planet carrier 133 stops rotating.

[0042] In the embodiment, the motor shaft gears 150 are arranged as three, and the three motor shaft gears 150 are uniformly spaced along the inner circumference of the ring gear 134. As a further preferred, the ring gear 134 is provided with a ring gear bearing 135 and is axially fixed in the motor cover through the ring gear bearing 135. Among them, the ring gear bearing 135 adopts a sliding bearing.

[0043] In the embodiment, one end of the piston rod 230 (the end located in the damper cylinder 210) is coaxially provided with an internally threaded hole; one end of the output shaft 120 is provided with an externally threaded portion 121 and extends into the damper cylinder 210 through the second through hole 210b of the damper cylinder 210; the output shaft 120 is connected to the internally threaded hole through the externally threaded portion 121. The output shaft 120 is provided with an output shaft bearing 122, and the outer ring of the output shaft bearing 122 is fixed in the motor cover 110, so as to realize axial fixation of the output shaft 120; the piston rod 230 and the output shaft 120 form a screw pair structure. When the piston rod 230 moves axially, the output shaft 120 can only rotate in the output shaft bearing 122 because it is axially fixed by the output shaft bearing 122. The output shaft 120 is further provided with a limiting boss 123, which is a circular ring and coaxially fixed on the output shaft 120. The limiting boss 123 is located between the output shaft bearing 122 and the sun gear 131, and can fix the sun gear 131 and the output shaft bearing 122 axially by arranging the limiting boss 123. The output shaft bearing 122 is a cylindrical roller bearing.

[0044] In another embodiment, one end of the piston rod 230 (the end located in the damper cylinder 210) is provided with an externally threaded portion; one end of the output shaft 120 is coaxially provided with an internally threaded hole, and the piston rod 230 is connected to the internally threaded hole of the output shaft 120 through the externally threaded portion. The output shaft 120 is provided with an output shaft bearing, so as to realize axial fixation of the output shaft 120; the piston rod 230 and the output shaft 120 form a screw pair structure. When the piston rod 230 moves axially, the output shaft 120 is driven to rotate.

[0045] As a further preferred, the motor cover 110 comprises a first cover body 110a, a second cover body 110b and a motor cover cover 110c. The first cover body 110a and the second cover body 110b are arranged along the axial direction of the output shaft 120 and oppositely arranged on both sides of the output shaft 120; the first cover body 110a is detachably fixedly connected to the second cover body 110b; and the motor cover cover 110c is detachably connected to one end of the first cover body 110a and the second cover body 110b. By arranging the detachable motor cover structure, the installation of the mechanism in the motor cover 110 and the maintenance during use can be facilitated.

[0046] In the embodiment, the first cover body 110a and the second cover body 110b are connected through bolts, and the motor cover cover 110c is connected to the first cover body 110a and the second cover body 110b through bolts, respectively. This makes it more convenient to disassemble and assemble the components of the motor cover 110.

[0047] As preferred, in another embodiment, the second motor 160 adopts a direct current planetary gear reduction motor, which combines a planetary gear set with a motor, and has the following advantages:

[0048] (1) The multi-stage speed regulation is realized by using the planetary gear set, so that the multi-stage adjustment of the damping is realized, and the complex working conditions of the shock absorber are adapted.

[0049] (2) The planetary gear structure is more compact, the stress is more uniform, and the carrying capacity is strong, so that the device has the advantages of stability and reliability, high working efficiency and the like.

[0050] Under normal working conditions, the energy recovery device provided by the application uses the resistance torque generated when the motor generates electricity to provide damping, and the damping can be changed by controlling the number of working second motors 160 and changing the motor torque.

[0051] The energy recovery device has different working characteristics in compression and extension strokes. The damping is reduced in the compression stroke to improve the comfort of the vehicle, and the damping is increased in the extension stroke to quickly absorb vibration. When driving on flat roads, a small planetary gear mechanism transmission ratio or a reduced number of working second motors 160 is selected to reduce the damping and improve the comfort; on bumpy roads, a large planetary gear mechanism transmission ratio or an increased number of working second motors 160 is selected to increase the damping.

[0052] The working process of the damping-adjustable vibration energy recovery device based on the helical planetary gear transmission provided by the application is as follows:

[0053] In the compression stroke of the shock absorber, the piston 220 and the piston rod 230 move towards the direction close to the sun gear 131, driving the output shaft 120 to rotate. At this time, the ring gear 134 is fixed by the ring gear brake mechanism, and the planet carrier 133 can rotate. The power transmission path is: output shaft 120→sun gear 131→planetary gear 132→planet carrier 133, thereby driving the motor shaft of the first motor 140 fixedly connected with the planet carrier 133 to rotate, generating electric energy and storing it in the first motor 140, so as to achieve the purpose of energy recovery.

[0054] In the extension stroke of the shock absorber, the piston 220 and the piston rod 230 move away from the sun gear 131, driving the output shaft 120 to rotate. At this time, the planet carrier 133 is fixed by the planet carrier brake mechanism, and the ring gear 134 can rotate. The power transmission path is: output shaft 120→sun gear 131→planetary gear 132→ring gear 134, thereby driving the motor shaft gear 150 meshing with the ring gear 134 to rotate, and further driving the motor shaft of the second motor 160 to rotate, generating electric energy and storing it in the second motor 160, so as to achieve the purpose of energy recovery.

[0055] Meanwhile, in the working process, the working conditions of the first motor 140 and the second motor 160 can be controlled through the reversible transmission property of the planetary gear system, the damping of the motor during power generation is fully utilized to realize the damping adjustability of the shock absorber, and the comfort of the vehicle is improved.

[0056] The application is a damping-adjustable vibration energy recovery device based on helical planetary gear transmission on the basis of traditional hydraulic cylinder shock absorber, adopts double-piston rod structure (both sides of the piston have a part of piston rod), the energy recovery mechanism is vertically arranged, the motor cover is connected with the axle, one end of the piston rod is connected with the frame through the dust cover, the other end and the output shaft form a helical pair structure, the linear motion of the piston rod is converted into the rotary motion of the output shaft through the helical pair structure, the output shaft is connected with the planetary gear mechanism, and the compression stroke and the extension stroke of the shock absorber are fully recovered by skillfully utilizing the speed ratio characteristics of the planetary gear mechanism. Meanwhile, in the working process, the working conditions and the working quantity of the motor are controlled, the damping of the motor during power generation is fully utilized to realize the damping adjustability of the shock absorber, and the comfort of the vehicle is improved.

[0057] Although the embodiments of the application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the application, and other modifications can be easily realized by those skilled in the art, therefore, the application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A damper-adjustable vibration energy recovery device based on a helical planetary gear transmission, characterized by, The shock absorber comprises a shock absorber cylinder, a piston and a piston rod. The piston is arranged in the shock absorber cylinder and can move axially along the shock absorber cylinder; the piston rod is coaxially fixedly connected to the piston; A motor cover is fixedly sleeved on the shock absorber cylinder; An output shaft is rotatably arranged in the motor cover and connected to the piston rod; when the piston rod moves axially along the shock absorber cylinder, the output shaft can be driven to rotate; A planetary gear mechanism comprises a sun gear, a plurality of planet gears, a planet carrier and a ring gear; The sun gear is fixedly connected to the output shaft; A first motor is fixedly arranged in the motor cover, and a motor shaft of the first motor is fixedly connected to the planet carrier; A plurality of motor shaft gears are respectively engaged with the ring gear; A plurality of second motors are fixedly arranged in the motor cover and correspondingly arranged with the motor shaft gears; a motor shaft of the second motor is fixedly connected to the motor shaft gear; A ring gear brake mechanism and a planet carrier brake mechanism are respectively arranged in the motor cover; During the compression stroke of the shock absorber, the ring gear is fixed by the ring gear brake mechanism; During the extension stroke of the shock absorber, the planet carrier is fixed by the planet carrier brake mechanism. One end of the piston rod is coaxially provided with an internal thread hole; one end of the output shaft is provided with an external thread and is matched and connected in the internal thread hole through the external thread.

2. The vibration energy harvesting device according to claim 1, wherein The output shaft is provided with an output shaft bearing and is axially fixed in the motor cover through the output shaft bearing.

3. The vibration energy harvester with adjustable damping based on a spiral planetary gear transmission according to claim 2, characterized in that The output shaft is provided with a limiting boss between the output shaft bearing and the sun gear.

4. The vibration energy harvesting device according to claim 3, wherein The ring gear is provided with a ring gear bearing and is axially fixed in the motor cover through the ring gear bearing.

5. The damper-adjustable vibration energy harvesting device based on a helical planetary gear transmission according to claim 3 or 4, characterized in that, The output shaft bearing adopts a cylindrical roller bearing; the ring gear bearing adopts a sliding bearing.

6. The damper-adjustable vibration energy harvesting device based on a helical planetary gear set according to claim 5, wherein The plurality of motor shaft gears are arranged on the inner side of the ring gear and are uniformly spaced along the inner circumference of the ring gear.

7. The damper-adjustable vibration energy harvesting device based on a helical planetary gear transmission according to claim 6, characterized in that, The motor cover comprises a first cover body, a second cover body and a motor cover cover; 8. The damper-adjustable vibration energy harvesting device based on a helical planetary gear transmission according to claim 7, characterized in that, The first cover body and the second cover body are arranged on both sides of the output shaft in the axial direction of the output shaft; the first cover body is detachably fixedly connected to the second cover body; and the motor cover cover is detachably connected to one end of the first cover body and the second cover body. One end of the piston rod provided with the internal thread hole is arranged in the shock absorber cylinder, and one end of the output shaft is inserted into the shock absorber cylinder and connected to the piston rod.

9. The damper-adjustable vibration energy harvesting device based on a helical planetary gear transmission according to claim 8, characterized in that, The other end of the piston rod extends to the outside of the shock absorber cylinder and is sleeved with a dust cover; the dust cover is fixedly connected to the piston rod.

10. The damping adjustable vibration energy recovery device based on helical planetary gear transmission according to claim 9, characterized in that: ​

Images