CN101985965A - Automobile energy renewable vibration absorber - Google Patents

Abstract

The invention discloses an automobile energy regenerative shock absorber, which comprises an upper working cylinder and a lower working cylinder, the lower working cylinder is slidably connected to the upper working cylinder, and a return cylinder is arranged in the upper working cylinder. Energy motor and a transmission mechanism; a motion conversion mechanism is provided in the lower working cylinder. The motion conversion mechanism is a ball screw pair, which converts the linear motion caused by the vibration of the car wheel into rotary motion and converts the up and down motion into the same direction through the overrunning clutch with opposite clutch directions in the transmission mechanism The rotary motion of the motor is converted into electrical energy by the regenerative motor for utilization.

Description

A kind of automobile energy regenerative shock absorber

technical field

The invention relates to an energy recovery technology, in particular to an automobile shock absorber used for recovering the vibration energy generated during the running of the automobile.

Background technique

The automobile suspension is a vibrating nonlinear system containing elastic and damping elements, which will generate random vibrations under the excitation of road irregularities and engine vibration sources. Usually, this part of vibration mechanical energy is converted into heat energy by the automobile suspension shock absorber and dissipated in vain. Especially in heavy trucks, this part of energy is still quite large and should be recycled.

According to retrieval, at present there is a device for recovering the vibration energy of the automobile suspension, such as the Chinese patent application whose publication number is CN1562652A discloses a kind of energy-feeding suspension for vehicles, which is composed of springs, energy-feeding suspensions Oil cylinder, feed power regulator, check valve, accumulator, hydraulic energy consumption components (hydraulic power brake, hydraulic power steering, etc.), hydraulic oil tank and oil pipe. The energy consumed by the damping elements in the traditional passive suspension system can be converted into hydraulic energy and stored in the accumulator, and the hydraulic energy obtained by feedback can be used by the hydraulic energy-consuming components on the vehicle, so that the vehicle can obtain good economic performance. sex.

Another example is that the Chinese patent application whose publication number is CN101550979A discloses a car shock absorber for recovering vibration energy, which includes a shock absorber body and a mounting bush, and is characterized in that it also includes an outer sleeve, a shock absorber core, a connecting Rod and return spring; the return spring is arranged in the outer sleeve, and the two ends of the return spring are respectively connected with the outer sleeve and the upper end of the shock absorber body; the shock absorber body is provided with a cavity, and the shock absorber The core can move up and down relative to the shock absorber body and is arranged in the cavity of the shock absorber body. The upper end of the shock absorber core is connected with the outer sleeve through a connecting rod; the shock absorber core is provided with magnetic poles, and the shock absorber core The body is a magnetic conductor with windings on it. The invention uses a linear generator to absorb the energy generated by the up and down vibration of the vehicle, and directly outputs electric energy for utilization.

There is also a Chinese patent with the notification number CN2811056Y disclosing a permanent-magnet type energy-feeding suspension, which is composed of a spring, an energy conversion magnetic circuit and an energy-feeding circuit; The energy feeding circuit is composed of the energy feeding coil, the rectifier assembly and the storage battery, which are sequentially connected by electromagnetic wires to form a loop; the spring, the excitation permanent magnet and the energy feeding coil form the energy feeding device, which is mechanically connected in parallel between the sprung mass and the axle. The invention can convert the energy consumed by the damping elements in the traditional passive suspension system into electric energy and store it in the storage battery, and the electric energy obtained by feedback can be used by other electrical appliances on the automobile, so that the automobile can obtain good economy.

Among the above three technical schemes for recycling the vibration energy of automobiles, there are energy recovery in the form of hydraulic energy storage, some use linear motors as energy recovery devices, and some use electromagnetic induction coils as recovery devices, but hydraulic energy storage exists The shortcomings of energy utilization are inconvenient, the linear motor has the disadvantages of high cost and complicated control, and the electromagnetic induction coil recovery device has the disadvantages of large volume and low efficiency.

Contents of the invention

The purpose of the present invention is to solve the problems of complex structure, high cost and large volume of the existing energy recovery shock absorber, and to provide a compact, simple and high-efficiency automotive energy regeneration shock absorber, with a simple electromechanical means Convert suspension vibration mechanical energy recovery into electrical energy.

The technical solution of the present invention is: an automobile energy regenerative shock absorber, including an upper working cylinder, a lower working cylinder, an energy recovery motor, a motion conversion mechanism and a transmission mechanism; the lower working cylinder is slidably connected to the upper working cylinder ; The motion conversion mechanism converts the linear motion caused by the vibration of the car wheel into a rotary motion; the transmission mechanism transmits the rotary motion to the energy recovery motor, and generates electric energy through the energy recovery motor; it is characterized in that : the motion conversion mechanism is installed in the lower working cylinder, which is a ball screw pair, including a ball screw and a screw nut; the screw nut is connected to the lower working cylinder, and the ball screw is installed on the upper The working cylinder is also provided with an upper main shaft connected to the transmission mechanism; the transmission mechanism includes a first overrunning clutch and a second overrunning clutch, which are respectively connected to the ball screw, and the clutch direction of the two overrunning clutches opposite to each other. Through the motion conversion of the ball screw pair, the structure of the shock absorber is more compact, and at the same time, the reliability and conversion efficiency of its conversion can be improved; the two overrunning clutches with opposite clutch directions can move the upper working cylinder The upward movement and downward movement of the motor are converted into rotational movement in the same direction, which improves the efficiency of the energy recovery motor to generate electric energy, and recycles the vibrating part of the vehicle.

Preferably, the transmission mechanism is installed in the upper working cylinder, and further includes a first driving gear, a second driving gear, a first ring gear, a second ring gear, a third ring gear and two planetary gears; The inner rings of the first overrunning clutch and the second overrunning clutch are connected to the main shaft at the upper end of the screw mandrel, and the outer rings of the first overrunning clutch and the second overrunning clutch are respectively connected with the first driving gear and the second driving gear; The first ring gear, the second ring gear and the third ring gear are solidified as one, and the first driving gear selectively meshes with the first ring gear through the two planetary gears; the second driving gear A gear selectively meshes with the second ring gear. Through the setting of three solidified ring gears, the structure of the transmission mechanism is very compact, and can be completely arranged in the upper working cylinder, so that the whole shock absorber is more concise and reliable.

As a preference, a meshing gear is further provided on the input shaft of the recuperation motor, which meshes with the third ring gear on the transmission mechanism, and the rotation motion of the first ring gear and the second ring gear passes through the first ring gear and the second ring gear. Three ring gears and meshing gears are transmitted to the regenerative motor. The rotation movement of the first ring gear and the second ring gear is transmitted to the energy recovery motor by setting meshing gears on the energy recovery motor, which facilitates the connection and installation of the energy recovery motor and the transmission mechanism.

Preferably, the transmission mechanism further includes a transmission main shaft and a coupling, and the main shaft at the upper end of the screw rod is connected to the transmission main shaft through the coupling. The transmission mechanism is provided with an independent transmission main shaft, and is connected with the main shaft at the upper end of the screw rod through a coupling, so as to facilitate the connection and installation of the ball screw and the transmission mechanism.

As a preference, a energy recovery motor mounting bracket and a transmission bracket are provided in the upper working cylinder; the energy recovery motor mounting bracket is arranged near the upper end of the upper working cylinder; the transmission bracket is arranged near the upper end of the upper working cylinder The lower end: on the installation bracket of the energy recovery motor installed on the energy recovery motor, a thrust bearing is provided on the transmission support, and the ball screw is rotatably connected to the transmission support through the thrust bearing. The setting of this structure can better meet the connection and installation among the energy recovery motor, the transmission mechanism and the ball screw, making the overall shock absorber more compact and simple.

As a preference, a buffer block is also provided at the bottom of the upper working cylinder and the lower end of the ball screw to reduce the contact between the bottom of the upper working cylinder and the upper end of the lower working cylinder and the lower end of the ball screw. The impact of the lower working cylinder increases the service life of the shock absorber.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is an enlarged view of part A of Fig. 1 .

Number description

1 upper working cylinder

2 lower working cylinder

3 ball screw

3a Spindle at the upper end of the screw

3b Screw buffer block

4 screw nut

5 energy recovery motor

6 The first ring gear

7 Second ring gear

8 third ring gear

9 The first driving gear

10 Second driving gear

11 planetary gear

12 The first overrunning clutch

13 Second overrunning clutch

14 meshing gear

15 drive shaft

16 coupling

17 Rolling bearings

18 Transmission bracket

19 thrust bearing

20 energy recovery motor mounting bracket

21 Buffer block bracket

22 compressed buffer blocks

23 Hanging ring

24 lower ring

25 Bearing retainer ring.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1 and Fig. 2, an automobile energy regenerative shock absorber includes an upper working cylinder 1, a lower working cylinder 2, an energy recovery motor 5, a ball screw 3, a screw nut 4, a first driving gear 9, a second Drive gear 10 , first overrunning clutch 12 , second overrunning clutch 13 , first ring gear 6 , second ring gear 7 , third ring gear 8 , planetary gear 11 , transmission main shaft 15 and meshing gear 14 .

An opening is provided at the upper end of the lower working cylinder 2, and the screw nut 4 is connected to the opening at the upper end of the lower working cylinder 2; the upper end of the ball screw 3 is provided with a main shaft 3a at the upper end of the screw, The lower end is provided with a screw buffer block 3b, and the ball screw 3 and the screw nut 4 form a motion conversion mechanism.

The first ring gear 6, the second ring gear 7 and the third ring gear 8 are solidified into one body, and the outer ring is provided with a rolling bearing 17 connected to the inner wall of the upper working cylinder 1; the planetary gear 11 is connected by a pin On a transmission bracket 18; the first driving gear 9, the second driving gear 10, the first overrunning clutch 12, the second overrunning clutch 13, the first ring gear 6, the second ring gear 7, the third ring gear 8 , planetary gear 11, transmission main shaft 15 and meshing gear 14 form a transmission mechanism. In this transmission mechanism, the first driving gear 9 and the second driving gear 10 are respectively fixed on the outer rings of the first overrunning clutch 12 and the second overrunning clutch 13; The inner ring of the overrunning clutch 13 is fixed on the transmission main shaft 15; the first driving gear 9 meshes with the two planetary gears 11, and the two planetary gears 11 mesh with the first ring gear 6; The second driving gear 10 meshes with the second ring gear 7; the third ring gear 8 meshes with the meshing gear 14; the clutch directions of the first overrunning clutch 12 and the second overrunning clutch 13 are mutually On the contrary, the first overrunning clutch 12 is engaged counterclockwise and disengaged clockwise; the second overrunning clutch 13 is engaged clockwise and disengaged counterclockwise.

Also be provided with energy recovery motor installation bracket 20 in described upper working cylinder 1, described energy recovery motor 5 is installed on this energy recovery motor installation bracket 20; The bottom of the above-mentioned working cylinder 1 is also provided with a shaft hole, and two thrust bearings 19 are arranged in the shaft hole, and a bearing retaining ring 25 is arranged on the top thereof, and the main shaft 3a at the upper end of the screw rod is connected by the thrust bearing 19. On the shaft hole, the part extending into the upper working cylinder 1 is connected with the transmission main shaft 15 protruding from the through hole provided by the transmission bracket 18 through a coupling 16 .

A buffer block bracket 21 is also provided under the bottom of the upper working cylinder 1, and a compression buffer block 22 is connected to the buffer block bracket 21, and the compression buffer block 22 is sleeved on the ball screw 3 Stretch out the 2 parts of the lower working cylinder. An upper lifting ring 23 and a lower lifting ring 24 are respectively connected to the upper end of the upper working cylinder 1 and the bottom of the lower working cylinder 2 .

The energy regenerative shock absorber converts the linear motion of the vibration generated when the car is running into a rotary motion through a motion conversion mechanism, and transmits the rotary motion to the regenerative motor through the transmission mechanism, and the regenerative motor generates electric energy. When the energy regenerative shock absorber is working, the lower working cylinder 2 moves upward relatively under the push of the vibration force (determined according to the position shown in the figure, the same below), since the screw nut 4 is fixed on the lower working cylinder 2 , the relative upward movement of the lower working cylinder 2 causes the ball screw 3 to rotate counterclockwise, since the first overrunning clutch 12 is engaged counterclockwise, disengages clockwise, and the second overrunning clutch 13 is engaged clockwise , disengaged counterclockwise, so the transmission main shaft 15 rotating counterclockwise at this time drives the first driving gear 9 to rotate counterclockwise through the first overrunning clutch 12, and through the planetary gear 8 meshing with it, the first ring gear 6, the second The three ring gear 8 and the meshing gear 14 drive the energy recovery motor 5 to rotate counterclockwise; the current working cylinder 2 rebounds under the promotion of the vibration force, moves downward relatively and drives the ball screw 3 to rotate clockwise, due to the The first overrunning clutch 12 engages counterclockwise and disengages clockwise, and the second overrunning clutch 13 engages clockwise and disengages counterclockwise. Therefore, the transmission main shaft 15 rotating clockwise drives the second overrunning clutch 13 through the second overrunning clutch 13. The second driving gear 9 rotates clockwise, and then drives the second ring gear 7, the third ring gear 8 and the meshing gear 14 to drive the energy recovery motor 5 to rotate counterclockwise, thereby ensuring that no matter whether the lower working cylinder 2 is relatively upward Motion or relative downward motion, all can make energy recovery motor 5 rotate in the same direction.

The above-described embodiment is only a preferred solution of the present invention, and does not limit the present invention in any form. There are other variations and modifications under the premise of not exceeding the technical solution described in the claims.

Claims (8)

1. An automobile energy regenerative shock absorber, comprising an upper working cylinder, a lower working cylinder, a recuperation motor, a motion conversion mechanism and a transmission mechanism; the lower working cylinder is slidably connected to the upper working cylinder; the moving The conversion mechanism converts the linear motion caused by the vibration of the car wheel into a rotary motion; the transmission mechanism transmits the rotary motion to the energy recovery motor, and generates electric energy through the energy recovery motor; it is characterized in that: the motion The conversion mechanism is installed in the lower working cylinder, which is a ball screw pair, including a ball screw and a screw nut; the screw nut is connected to the lower working cylinder, and the ball screw is installed on the upper working cylinder and An upper main shaft is provided to be connected to the transmission mechanism; the transmission mechanism includes a first overrunning clutch and a second overrunning clutch, which are respectively connected to the ball screw, and the clutching directions of the two overrunning clutches are opposite to each other. 2. A kind of automobile energy regenerative shock absorber according to claim 1, characterized in that: the transmission mechanism is installed in the upper working cylinder, and also includes a first driving gear, a second driving gear, a first tooth ring, the second ring gear, the third ring gear and two planetary gears; the inner rings of the first overrunning clutch and the second overrunning clutch are connected with the main shaft at the upper end of the ball screw, and the first overrunning clutch and the second overrunning clutch The outer ring of the overrunning clutch is respectively connected with the first driving gear and the second driving gear; the first ring gear, the second ring gear and the third ring gear are solidified into one, and the first driving gear selectively passes through The two planetary gears mesh with the first ring gear; the second driving gear selectively meshes with the second ring gear. 3. A kind of automobile energy regenerative shock absorber according to claim 1 or 2, characterized in that: a meshing gear is also provided on the input shaft of the regenerative motor, and the third tooth on the transmission mechanism The rings mesh, and the rotational motion of the first ring gear and the second ring gear is transmitted to the regenerative motor through the third ring gear and the meshing gear. 4. The automobile energy regenerative shock absorber according to claim 1 or 2, characterized in that: the transmission mechanism also includes a transmission main shaft and a shaft coupling, and the main shaft at the upper end of the screw rod passes through the coupling The shaft device is connected on the transmission main shaft. 5. A kind of automobile energy regenerative shock absorber according to claim 1 or 2, characterized in that: an energy recovery motor mounting bracket and a transmission bracket are arranged in the upper working cylinder; the energy recovery motor is installed The bracket is arranged near the upper end of the upper working cylinder; the transmission bracket is arranged near the lower end of the upper working cylinder; the energy recovery motor is installed on the energy recovery motor mounting bracket, and a thrust bearing is provided on the transmission bracket. The ball screw is rotatably connected to the transmission bracket through the thrust bearing. 6. The automobile energy regenerative shock absorber according to claim 1 or 2, characterized in that: a buffer block is provided at the bottom of the upper working cylinder and the lower end of the ball screw. 7. The automobile energy regenerative shock absorber according to claim 3, wherein the transmission mechanism further comprises a transmission main shaft and a shaft coupling, and the main shaft at the upper end of the screw rod passes through the coupling connected to the drive shaft. 8. The automobile energy regenerative shock absorber according to claim 5, characterized in that: a buffer block is provided at the bottom of the upper working cylinder and the lower end of the ball screw.

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