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

Abstract

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

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 gear transmission. Background Art

[0002] Shock absorbers are used to dampen spring oscillations and road impacts after absorbing vibrations. They are widely used in automobiles to accelerate the attenuation of frame and body vibrations, thereby improving ride comfort. 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. The few 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 helical gear transmission, which is arranged along the axial direction of the shock absorber, occupies a small space and is easy to install; it can not only fully recover the energy of the compression stroke and extension stroke of the shock absorber, but also control the amount of motor operation through a one-way clutch, and make full use of the damping generated when the motor generates electricity to achieve the damping adjustability of the shock absorber, thereby improving the comfort of the vehicle.

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

[0005] A vibration energy recovery device with adjustable damping based on helical 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 driving gear fixedly connected to the output shaft;

[0011] a plurality of first driven gears, which are respectively engaged with the driving gears;

[0012] a plurality of first motors fixedly disposed in the motor cover; the first motors are disposed in one-to-one correspondence with the first driven gears and are selectively connected to the first driven gears via motor shafts;

[0013] a plurality of second driven gears, which are respectively engaged with the driving gear;

[0014] a plurality of second motors, which are fixedly arranged in the motor cover; the second motors are arranged in one-to-one correspondence with the second driven gears, and selectively connect the second driven gears through motor shafts.

[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 the output shaft is connected in the threaded hole through the external thread.

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

[0017] Preferably, the output shaft bearing is two, and the two output shaft bearings are symmetrically arranged on both sides of the driving gear.

[0018] Preferably, a one-way clutch is arranged between the motor shaft of the first motor and the first driven gear; a one-way clutch is arranged between the motor shaft of the second motor and the second driven gear.

[0019] Preferably, the output shaft bearing is a cylindrical roller bearing.

[0020] Preferably, the motor cover comprises a first cover body and a second cover body, the first cover body and the second cover body are detachably fixedly connected; the first cover body and the second cover body are arranged along the axial direction of the output shaft, and are symmetrically arranged on both sides of the output shaft.

[0021] Preferably, the first cover body and the second cover body are connected through bolts.

[0022] Preferably, the end of the piston rod, in which the 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.

[0023] Preferably, 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 with the piston rod.

[0024] The beneficial effects of the present application are:

[0025] The application provides a damping-adjustable vibration energy recovery device based on helical 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, realizes efficient utilization of energy, and achieves the goal of energy saving, emission reduction and green environmental protection.

[0026] The damping-adjustable vibration energy recovery device based on helical gear transmission provided by the application recovers energy through multiple motors; during operation, the number of working motors can be controlled through the first one-way clutch and the second one-way clutch, the damper adjustability of the shock absorber is realized by fully utilizing the generated damping when the motor generates electricity, and the comfort of a vehicle is improved.

[0027] The damping-adjustable vibration energy recovery device based on helical 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

[0028] Fig. 1 FIG. 1 is an internal structure diagram of the damping-adjustable vibration energy recovery device based on helical gear transmission.

[0029] Fig. 2 FIG. 4 is a structure diagram of cooperation between a shock absorber cylinder and an output shaft.

[0030] Fig. 3 FIG. 6 is a structure diagram of cooperation between a piston rod and an output shaft.

[0031] Fig. 4 FIG. 8 is a structure diagram of one end of a shock absorber cylinder.

[0032] Fig. 5 FIG. 10 is a structure diagram of the other end of the shock absorber cylinder.

[0033] Fig. 6 FIG. 12 is a structure diagram of cooperation between a motor cover and a shock absorber cylinder.

[0034] Fig. 7 FIG. 14 is an external structure diagram of the damping-adjustable vibration energy recovery device based on helical gear transmission. DETAILED DESCRIPTION

[0035] The application will be further described in detail below with reference to the drawings, so that those skilled in the art can implement the application according to the description and drawings.

[0036] As Figs. 1-7 shown, the application provides a damping adjustable vibration energy recovery device based on helical gear transmission, mainly comprising: shock absorber, motor cover 110, output shaft 120, driving gear 130, first driven gear 140, second driven gear 150, first motor 160, second motor 170.

[0037] 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 two ends of the shock absorber cylinder 210 are coaxially provided with a first through hole 210a and a second through hole 210b, 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. One end of the shock absorber cylinder 210 is provided with a circular annular shoulder 211, 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, the dust cover 240 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 with 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 providing 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 cylinder shock absorber used in the application and the hydraulic shock absorber commonly used in the prior art have basically the same principle, which will not be repeated here.

[0038] The output shaft 120 is rotatably arranged in the motor cover 110 and connected with the piston rod 230; when the piston rod 230 moves along the axial direction of the damper cylinder 210, the output shaft 120 can be driven to rotate. The driving gear 130 is coaxially fixedly connected on the output shaft 120. A plurality of first driven gears 140 are respectively engaged with the driving gear 130; a plurality of first motors 160 are fixedly arranged in the motor cover 110; the first motors 160 are arranged in one-to-one correspondence with the first driven gears 140, and the first motors 160 selectively connect the first driven gears 140 through motor shafts. A plurality of second driven gears 150 are respectively engaged with the driving gear 130; a plurality of second motors 170 are fixedly arranged in the motor cover 110; the second motors 170 are arranged in one-to-one correspondence with the second driven gears 150, and the second motors 170 selectively connect the second driven gears 150 through motor shafts. In the embodiment, the first driven gears 140 and the second driven gears 150 are respectively provided as two, and the two first driven gears 140 are symmetrically arranged about the center of the driving gear 130, and the two second driven gears 150 are symmetrically arranged about the center of the driving gear 130.

[0039] In the embodiment, one end (the end located in the damper cylinder 210) of the piston rod 230 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 on the damper cylinder 210; the output shaft 120 is connected in 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 the 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. At the same time, the axial fixation of the driving gear 130 is realized through the output shaft bearing 122.

[0040] In another embodiment, one end (the end located in the damper cylinder 210) of the piston rod 230 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 in 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 the 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.

[0041] As preferred, the output shaft bearing 122 is provided in two, and the two output shaft bearings 122 are symmetrically arranged on both sides of the driving gear 130. The provision of two output shaft bearings 122 can better ensure the fixing effect of the output shaft 120 and the driving gear 130. Among them, the output shaft bearing 122 adopts a cylindrical roller bearing.

[0042] In the embodiment, a first one-way clutch 141 is arranged between the motor shaft of the first motor 160 and the first driven gear 140, and the motor shaft of the first motor 160 is connected or disconnected with the first driven gear 140 through the first one-way clutch 141. A second one-way clutch 151 is arranged between the motor shaft of the second motor 170 and the second driven gear 150, and the motor shaft of the second motor 170 is connected or disconnected with the second driven gear 150 through the second one-way clutch 151. The motor shaft of the first motor 160 and the motor shaft of the second motor 170 are respectively provided with motor shaft bearings, and are axially fixed in the motor cover 110 through the motor shaft bearings. Among them, the motor shaft bearing shaft adopts a cylindrical roller bearing.

[0043] As preferred, the motor cover 110 comprises: a first cover body 110a and a second cover body 110b, which are detachably fixedly connected; the first cover body 110a and the second cover body 110b are arranged along the axial direction of the output shaft 120 and symmetrically arranged on both sides of the output shaft 120. By setting the detachable motor cover structure, the installation of the mechanism in the motor cover 110 can be facilitated, and the maintenance during use can be facilitated.

[0044] As further preferred, the first motor 160 and the second motor 170 both adopt a direct-current planetary gear reduction motor, which combines a planetary gear set with a motor, and has the following advantages:

[0045] (1) The planetary gear set is used to realize multi-stage speed regulation, thereby realizing large-scale adjustment of damping and adapting to complex working conditions of the shock absorber.

[0046] (2) The planetary gear structure is more compact, the stress is more uniform, and the bearing capacity is strong, so that the device has the advantages of stability and reliability, high working efficiency, etc.

[0047] Under normal working conditions, the energy recovery device provided by the application utilizes the resistance torque generated when the motor generates electricity to provide damping, and the damping can be changed by controlling the working quantity of the first motor 160 and the second motor 170 and changing the motor output torque.

[0048] In the embodiment, the first cover 110a and the second cover 110b are connected by bolts, and the motor cover 110c is connected with the first cover 110a and the second cover 110b by bolts respectively, so that the disassembly and assembly of the components of the motor cover 110 are more convenient.

[0049] The working process of the damping-adjustable vibration energy recovery device based on the helical gear transmission provided by the application is as follows:

[0050] During the compression stroke of the shock absorber, the piston 220 and the piston rod 230 move towards the direction close to the driving gear 130, and drive the output shaft 120 to rotate, at this time, the first one-way clutch 141 is engaged, and the second one-way clutch 151 is disconnected; the power transmission path is: the output shaft 120→the driving gear 130→the first driven gear 140→the first one-way clutch 141→the motor shaft of the first motor 160, so as to drive the motor shaft of the first motor 160 to rotate, generate electric energy and store it in the first motor 160, so as to achieve the purpose of energy recovery.

[0051] During the extension stroke of the shock absorber, the piston 220 and the piston rod 230 move towards the direction away from the driving gear 130, and drive the output shaft 120 to rotate, at this time, the first one-way clutch 141 is disconnected, and the second one-way clutch 151 is engaged; the power transmission path is: the output shaft 120→the driving gear 130→the second driven gear 150→the second one-way clutch 151→the motor shaft of the second motor 170, so as to drive the motor shaft of the second motor 170 to rotate, generate electric energy and store it in the second motor 170, so as to achieve the purpose of energy recovery.

[0052] Meanwhile, during the working process, the number of working of the first motor 160 and the second motor 170 can be controlled through the first one-way clutch 141 and the second one-way clutch 151, the damping generated 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.

[0053] The application is an adjustable damping vibration energy recovery device based on helical gear transmission on the basis of traditional hydraulic cylinder shock absorber, which 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 screw pair structure, the linear motion of the piston rod is converted into the rotary motion of the output shaft through the screw pair structure, the output shaft is fixedly connected with the gear, the speed ratio is changed through the gear transmission, the full energy recovery of the compression stroke and the extension stroke of the shock absorber is realized through the one-way clutch, meanwhile, the number of the motor working can be controlled through the one-way clutch in the working process, the damping generated when the motor generates electricity is fully utilized to realize the adjustable damping of the shock absorber and improve the comfort of the vehicle.

[0054] 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 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 driving gear is fixedly connected to the output shaft; A plurality of first driven gears are respectively engaged with the driving gear; A plurality of first motors are fixedly arranged in the motor cover; the first motors are arranged in one-to-one correspondence with the first driven gears and selectively connected to the first driven gears through motor shafts; A plurality of second driven gears are respectively engaged with the driving gear; A plurality of second motors are fixedly arranged in the motor cover; the second motors are arranged in one-to-one correspondence with the second driven gears and selectively connected to the second driven gears through motor shafts; A first one-way clutch is arranged between the motor shaft of the first motor and the first driven gear; a second one-way clutch is arranged between the motor shaft of the second motor and the second driven gear; The number of the first motors and the second motors in operation is controlled through the first one-way clutch and the second one-way clutch. One end of the piston rod is coaxially provided with an internally threaded hole; one end of the output shaft is provided with an externally threaded hole and is connected to the internally threaded hole through the externally threaded hole.

2. The damper-adjustable vibration energy harvesting device based on a spiral gear transmission according to claim 1, wherein An output shaft bearing is arranged on the output shaft and axially fixed in the motor cover through the output shaft bearing.

3. The damper-adjustable vibration energy harvesting device based on a spiral gear transmission according to claim 2, characterized in that, The output shaft bearing is two, and the two output shaft bearings are symmetrically arranged on both sides of the driving gear.

4. The damper-adjustable vibration energy harvesting device based on a spiral gear transmission according to claim 3, wherein The output shaft bearing is a cylindrical roller bearing.

5. The damper-adjustable vibration energy harvesting device based on a spiral gear transmission according to claim 3 or 4, characterized in that, The motor cover comprises a first cover body and a second cover body, which are detachably fixedly connected; the first cover body and the second cover body are arranged along the axial direction of the output shaft and symmetrically arranged on both sides of the output shaft.

6. The damper-adjustable vibration energy harvesting device based on a spiral gear transmission according to claim 5, wherein The first cover body and the second cover body are connected through bolts.

7. The helical gear transmission based damped and tunable vibration energy harvester according to claim 6, wherein, The end of the piston rod provided with the internally threaded hole is located 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.

8. The damper-adjustable vibration energy harvesting device based on a spiral gear transmission according to claim 7, wherein 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.

9. The damper-adjustable vibration energy harvesting device based on a spiral gear transmission according to claim 8, wherein ​

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