CN108468625B

CN108468625B - Suspension vibration energy driving braking system

Info

Publication number: CN108468625B
Application number: CN201810087784.4A
Authority: CN
Inventors: 陈龙; 刘昌宁; 杨晓峰; 杨艺; 刘雁玲; 沈钰杰; 李洪昌; 赵文涛
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2018-01-30
Filing date: 2018-01-30
Publication date: 2020-06-09
Anticipated expiration: 2038-01-30
Also published as: CN108468625A

Abstract

The invention provides a suspension vibration energy driving brake system which comprises an inerter assembly, a hydraulic motor coupling assembly and a driving shaft, wherein the inerter assembly comprises a first vibration damping device, a second vibration damping device and a first vibration damping device; the inerter assembly is arranged between the vehicle body and the swing arm; the hydraulic motor coupling assembly comprises a hydraulic motor and a coupler assembly, an input transmission shaft of the hydraulic motor is connected with the coupler assembly, and an output end of the coupler assembly is connected with a driving shaft and used for transmitting torque; the inerter assembly comprises a dual-piston rod cylinder and a one-way valve assembly; the one-way valve assembly comprises a one-way valve and a reversing switch, the two one-way valves are connected in parallel, and the mounting directions of the two one-way valves are opposite; the two one-way valves are connected with the reversing switch; the invention can directly convert the vibration energy of the vehicle into driving energy or braking energy, so that the energy does not need to be converted for many times, the efficiency is higher, the vibration energy can be recovered to the maximum extent, and the aims of saving energy and reducing emission of the vehicle are fulfilled.

Description

Suspension vibration energy driving braking system

Technical Field

The invention relates to the technical field of vehicle suspensions, in particular to a vibration energy driving braking system of a suspension.

Background

In recent years, energy conservation and emission reduction in various industries have become a very important issue. One useful way to limit the dissipation of energy is to recover that portion of the dissipated energy. In the driving process of a vehicle, the relative displacement of the sprung mass and the unsprung mass of the vehicle can be caused by the unevenness of the road surface, the acceleration and the deceleration of the vehicle and other reasons, so that certain vibration energy is generated, and the traditional suspension can emit the vibration energy to the atmosphere in a heat mode and then is lost due to the existence of a passive damper. At present, a common method is to convert the mechanical energy of vibration into electric energy by using a motor (a linear motor or a rotating motor) and store the electric energy in a storage battery or a super capacitor, but the generating efficiency of the current power plant can only reach 40% -60%, and compared with the efficiency of an energy recovery system arranged on a vehicle, the efficiency is only lower, more energy is dissipated, and the current prior art can not realize energy conservation well.

When the vehicle runs on a flat road, energy provided by an engine is mainly used for driving the vehicle to run, but when the road is bumpy, a large part of the energy for driving the vehicle to run can be dissipated in the shock absorber, and under the working condition of poor road conditions, over 30% of the energy can be dissipated due to bumping, and meanwhile, the temperature of the shock absorber can be sharply increased, and the vehicle speed can be sharply decreased.

In the process of braking the vehicle, the pitching motion of the vehicle can cause uneven stress on each wheel, the optimal braking state cannot be realized, and the vibration energy of the pitching motion of the vehicle body is finally absorbed by the shock absorber and is converted into heat to be dissipated into the air.

The scholars of Cambridge university SIMTH put forward the thought of the inerter-spring-type inerter in 2002, and after designing the gear rack type inerter-spring-type inerter and the ball screw type inerter-spring-type inerter, the strict correspondence between the mechanical network and the electronic network is realized, and the development of the mechanical network is promoted. After the machine and the electronic network are strictly corresponding, a large number of electronic network theories and research methods can be applied to mechanical systems, including automobile suspension systems, vehicle steering systems, train suspension systems, building vibration isolation systems, helicopter vibration isolation systems, dynamic vibration absorption devices and the like, and various forms such as rack and pinion type inertial containers, ball screw type inertial containers, hydraulic generation type inertial containers, lever mass inertial containers, torsion inertial containers, small tooth difference planetary gear torsion inertial containers, cycloid steel ball torsion inertial containers and the like are developed. The inerter can enable the vehicle suspension to have a better vibration isolation effect under low-frequency vibration. However, under the excitation of high-frequency vibration, the inerter cannot perform a vibration isolation effect on the high-frequency vibration, and energy on the flywheel is wasted, which is contrary to the energy saving and emission reduction concept advocated at present.

Compared with other types of transmission, the hydraulic transmission has small volume and light weight under the condition of the same power, so that the inertia is small, the action is sensitive, and frequent starting and reversing can be realized. And overload protection is easy to realize, and the overload can be prevented by generally arranging a safety valve. The operation is stable, and the impact and the vibration are easy to absorb. The hydraulic transmission can be used for transmission in various directions, and reciprocating transmission is easy to realize. Due to the small volume and the large transmitted power, complex motion forms can be transmitted in a small space. These features make the use of hydraulic drives very common in combination machine tools and automated lines.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a suspension vibration energy driving brake system which can directly convert the vibration energy of a vehicle into driving energy or braking energy by using the energy storage function of an inertial container, so that the energy does not need to be converted for many times, the efficiency is higher, the vibration energy can be recovered to the maximum extent, and the purposes of saving energy and reducing emission of the vehicle are achieved.

The present invention achieves the above-described object by the following technical means.

A suspension vibration energy driven brake system comprises an inerter assembly, a hydraulic motor coupling assembly and a drive shaft; the inerter assembly is arranged between the vehicle body and the swing arm; the hydraulic motor coupling assembly comprises a hydraulic motor and a coupler assembly, an input transmission shaft of the hydraulic motor is connected with the coupler assembly, and an output end of the coupler assembly is connected with a driving shaft and used for transmitting torque; the inerter assembly comprises a double-piston-rod cylinder and a plurality of one-way valve assemblies; the one-way valve assembly comprises a one-way valve and a reversing switch, the two one-way valves are connected in parallel, and the mounting directions of the two one-way valves are opposite; the two one-way valves are connected with the reversing switch; the inlet and the outlet of the double-piston rod cylinder are respectively connected with one end of a one-way valve component, and the other end of the one-way valve component is connected with the inlet of the hydraulic motor; the inlet and the outlet of the double-piston rod cylinder are respectively connected with one end of another one-way valve component, and the other end of the another one-way valve component is connected with the outlet of the hydraulic motor.

Further, the lifting device also comprises an upper lifting lug, a lower lifting lug and a cylinder barrel frame; one end of a piston rod of the double-piston rod cylinder is provided with an upper lifting lug, and the upper lifting lug is connected with a vehicle body; one end of the cylinder body of the double-piston rod cylinder is provided with a cylinder barrel frame, and the other end of the piston rod of the double-piston rod cylinder is positioned in the cylinder barrel frame; the bottom of the cylinder barrel frame is provided with a lower lifting lug, and the lower lifting lug is connected with the swing arm.

And the other end of the piston rod of the double-piston rod cylinder is provided with the anti-collision device for limiting and protecting the cylinder barrel frame from being punctured.

Further, the coupler assembly comprises an input transmission shaft, a transmission wheel A, an impeller, a transmission wheel B, an oil cavity and a transmission wheel C; one end of the input transmission shaft is connected with the output end of the hydraulic motor, and the other end of the input transmission shaft is fixedly connected with the driving wheel A; an oil cavity is arranged in the input transmission shaft and is communicated with an inlet of the hydraulic motor and an inner groove of the transmission wheel C; the driving wheel C is in clearance fit with the input transmission shaft and can slide along the axial direction; the impeller is positioned between the driving wheel C and the driving wheel B, and the impeller is in clearance fit in the driving wheel B; the driving wheel B is fixedly connected to the driving shaft.

Furthermore, the device also comprises a return elastic sheet, wherein the return elastic sheet is positioned between the input transmission shaft and the transmission wheel C and is used for resetting the input transmission shaft.

Further, still include spring element and damping element, spring element and damping element install respectively between automobile body and swing arm.

The invention has the beneficial effects that:

1. the suspension vibration energy driving brake system can directly convert the vibration energy of the vehicle into driving energy or braking energy, so that the energy does not need to be converted for many times, the efficiency is higher, the vibration energy can be recovered to the maximum extent, and the aims of saving energy and reducing emission of the vehicle are fulfilled.

2. According to the suspension vibration energy driving brake system, the inerter-tank assembly, the spring element and the damping element are arranged, so that the vehicle suspension has the elastic property, the damping property and the rigidity property at the same time, low-frequency vibration in the vehicle running process can be effectively filtered, and the riding comfort and the operation stability of a vehicle are remarkably improved compared with a traditional suspension system only comprising the rigidity property and the damping property.

Drawings

Fig. 1 is a schematic layout of a suspension vibration energy driven brake system according to the present invention.

FIG. 2 is a schematic structural diagram of an inerter assembly according to the present invention.

Fig. 3 is a block diagram of a coupler assembly according to the present invention.

In the figure:

1-a vehicle body; 2-a spring element; 3-a damping element; 4-inerter assembly; 5-swing arm, 6-hydraulic motor coupling assembly; 7-a drive shaft; 8-vehicle wheels; 9-upper lifting lugs; 10-a piston; 11-a cylinder barrel; 12-cylinder barrel frame; 13-a piston rod; 14-a collision avoidance device; 15-lower lifting lug; 16-a one-way valve; 171-a first reversing switch; 172-a second reversing switch; 173-third change-over switch; 174-a fourth reversing switch; 18-hydraulic motor, 19-driving wheel A, 20-input transmission shaft, 21-impeller, 22-driving wheel B, 23-shell, 24-return elastic sheet, 25-oil cavity and 26-driving wheel C.

Detailed Description

The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.

As shown in FIG. 1, the suspension vibration energy driven brake system comprises an inerter assembly 4, a hydraulic motor coupling assembly 6 and a driving shaft 7; the inerter assembly 4, the spring element 2 and the damping element 3 are respectively arranged between the vehicle body 1 and the swing arm 5; the hydraulic motor coupling assembly 6 comprises a hydraulic motor 18 and a coupler assembly, wherein an input transmission shaft 20 of the hydraulic motor 18 is connected with the coupler assembly, and the output end of the coupler assembly is connected with the driving shaft 7 and is used for transmitting torque; the drive shaft 7 is connected to wheels 8.

As shown in fig. 2, the inerter assembly 4 comprises a dual piston rod cylinder and a one-way valve assembly; a piston 10 is arranged in the double-piston rod cylinder, the piston 10 is connected with a piston rod 13, one end of the piston rod 13 of the double-piston rod cylinder is provided with an upper lifting lug 9, and the upper lifting lug 9 is connected with the vehicle body 1; one end of a cylinder body 11 of the double-piston rod cylinder is provided with a cylinder barrel frame 12, and the other end of a piston rod 13 of the double-piston rod cylinder is positioned in the cylinder barrel frame 12; the bottom of the cylinder barrel frame 12 is provided with a lower lifting lug 15, and the lower lifting lug 15 is connected with the swing arm 5. And the other end of the piston rod 13 of the double-piston rod cylinder is provided with an anti-collision device 14 for limiting and protecting the cylinder barrel frame 12 from being punctured.

As shown in fig. 2, the check valve assembly comprises a check valve 16 and a reversing switch, wherein the two check valves 16 are connected in parallel, and the two check valves 16 are installed in opposite directions; the two check valves 16 are connected with the reversing switch; the inlet and the outlet of the double-piston rod cylinder are respectively connected with one end of a one-way valve component, and the other end of the one-way valve component is connected with the inlet of the hydraulic motor 18; the inlet and the outlet of the double-piston rod cylinder are respectively connected with one end of another one-way valve component, and the other end of the another one-way valve component is connected with the outlet of the hydraulic motor 18. The method specifically comprises the following steps: the check valve assembly has 4 and is first check valve assembly, second check valve assembly, third check valve assembly and fourth check valve assembly respectively. The first one-way valve assembly includes a first reversing switch 171; the second one-way valve assembly includes a second reversing switch 172; the third one-way valve assembly includes a third reversing switch 173; the fourth one-way valve assembly includes a fourth reversing switch 174; the inlet and the outlet of the double-piston rod cylinder are connected in parallel, and the first way is that the first one-way valve component and the second one-way valve component are connected in series; the second way is that the third one-way valve component and the fourth one-way valve component are connected in series; the first check valve assembly and the second check valve assembly are connected with an inlet of the hydraulic motor 18 through a pipeline; the third one-way valve assembly and the fourth one-way valve assembly are connected with the outlet of the hydraulic motor 18 through pipelines.

As shown in fig. 3, the coupler assembly includes an input drive shaft 20, a drive wheel a19, an impeller 21, a drive wheel B22, an oil chamber 25, and a drive wheel C26; one end of the input transmission shaft 20 is connected with the output end of the hydraulic motor 18, and the other end of the input transmission shaft 20 is fixedly connected with a driving wheel A19; an oil cavity 25 is arranged in the input transmission shaft 20, and the oil cavity 25 is communicated with an inlet of the hydraulic motor 18 and an inner groove of the transmission wheel C26; the driving wheel C26 is in clearance fit with the input transmission shaft 20, and the driving wheel C26 can slide along the axial direction; the impeller 21 is positioned between the driving wheel C26 and the driving wheel B22, and the impeller 21 is in clearance fit with the driving wheel B22; the driving wheel B22 is fixedly connected on the driving shaft 7. The return elastic sheet 24 is positioned between the input transmission shaft 20 and the transmission wheel C26 and is used for returning the input transmission shaft 20. The working process is as follows: an oil chamber 25 is arranged in the input transmission shaft 20, when the hydraulic motor 18 works, the oil chamber 25 is filled with incompressible oil, when the internal pressure of the hydraulic motor is large enough, the oil can push the transmission wheel C26 to the impeller 21, so that the distance between the transmission wheel C26 and the impeller 21 is small, the transmission wheel C26 can drive the impeller 21 to rotate through the transmission medium tuning fluid, the input transmission shaft 20 is connected with the transmission wheel A19, when the transmission wheel A19 rotates, the transmission medium tuning fluid in the transmission wheel A19 is also driven to rotate together, under the action of centrifugal force, the tuning fluid flows from the inner edge of the transmission wheel A19 to the outer edge along the middle impeller 21, the transmission wheel B22 is driven to rotate, finally, the driving force is transmitted to the wheels through the output transmission shaft 24. When the road surface is relatively flat and the suspension has relatively small vibration, the driving wheel C26 cannot be pressed to the impeller 21 because the oil pressure is relatively small, the driving wheel C26 is far away from the impeller 21 and cannot be driven, and the return elastic sheet 24 provides return force for the driving wheel C26.

The operation of the device is further described below:

in the process of driving a vehicle on a flat road, the inerter plays a main role, the spring has a good vibration isolation effect under high-frequency vibration, the inerter has a good vibration isolation effect under low-frequency vibration, and the structure of the spring-damping-inerter ensures that the vehicle has good riding comfort and operation stability in the full frequency domain. As shown in fig. 2, the one-way valve assembly has 2 one-way valves with opposite directions, the one-way valve communicated from top to bottom is a forward one-way valve, and the one-way valve communicated from bottom to top is a reverse one-way valve;

when the road surface unevenness is large, the vehicle begins to bump, the inertial container drives the hydraulic motor coupling assembly 6 to work, the accelerator sensor detects that the vehicle is in the running process and sends a control signal to the reversing switch, so that the first reversing switch 171 is communicated with the reverse one-way valve of the first one-way valve assembly, the fourth reversing switch 174 is communicated with the reverse one-way valve of the fourth one-way valve assembly, the second reversing switch 172 is communicated with the forward one-way valve of the second one-way valve assembly, the third reversing switch 173 is communicated with the forward one-way valve of the third one-way valve assembly, and at the moment, the hydraulic motor coupling assembly 6 transmits the energy of the vibration of the vehicle body to the driving shaft to drive the wheels.

When the vehicle is braked and decelerated, the vehicle generates pitching motion, the inertial container drives the hydraulic motor coupling assembly 6 to work at the moment, the brake pedal sensor identifies that the vehicle is in a braking state and sends a control signal to the reversing switch, so that the first reversing switch 171 is communicated with the forward one-way valve of the first one-way valve assembly, the fourth reversing switch 174 is communicated with the forward one-way valve of the fourth one-way valve assembly, the second reversing switch 172 is communicated with the reverse one-way valve of the second one-way valve assembly, the third reversing switch 173 is communicated with the reverse one-way valve of the third one-way valve assembly, and at the moment, the hydraulic motor coupling assembly 6 transmits the energy of vehicle body vibration to the driving shaft to brake the wheels.

Further, the reversing switches have an interlocking structural relationship, the first reversing switch 171 and the fourth reversing switch 174 can only be simultaneously connected with the corresponding forward one-way valve or the corresponding reverse one-way valve, and the second reversing switch 171 and the third reversing switch 174 can only be simultaneously connected with the corresponding forward one-way valve or the corresponding reverse one-way valve.

The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A suspension vibration energy driven brake system is characterized by comprising an inerter assembly (4), a hydraulic motor coupling assembly (6), a spring element (2), a damping element (3) and a driving shaft (7); the inerter assembly (4) is installed between the vehicle body (1) and the swing arm (5), and the inerter assembly (4) is connected with the driving shaft (7) through the hydraulic motor coupling assembly (6); the spring element (2) and the damping element (3) are respectively arranged between the vehicle body (1) and the swing arm (5);

the hydraulic motor coupling assembly (6) comprises a hydraulic motor (18) and a coupler assembly, an input transmission shaft (20) of the hydraulic motor (18) is connected with the coupler assembly, and the output end of the coupler assembly is connected with a driving shaft (7) and used for transmitting torque;

the inerter assembly (4) comprises a double-piston-rod cylinder and a plurality of one-way valve assemblies; the check valve assembly comprises a check valve (16) and reversing switches (171, 172, 173 and 174), the two check valves (16) are connected in parallel, and the installation directions of the two check valves (16) are opposite; the two one-way valves (16) are connected with the reversing switches (171, 172, 173 and 174) and are used for realizing the switching of the vibration energy and the driving energy or the braking energy of the vehicle by selectively controlling the reversing switches (171, 172, 173 and 174); the inlet and the outlet of the double-piston rod cylinder are respectively connected with one end of a one-way valve component, and the other end of the one-way valve component is connected with the inlet of a hydraulic motor (18); the inlet and the outlet of the double-piston rod cylinder are respectively connected with one end of another one-way valve component, and the other end of the another one-way valve component is connected with the outlet of the hydraulic motor (18).

2. The suspension vibration energy driven brake system according to claim 1, further comprising an upper lifting lug (9), a lower lifting lug (15) and a cylinder frame (12); one end of a piston rod (13) of the double-piston rod cylinder is provided with an upper lifting lug (9), and the upper lifting lug (9) is connected with the vehicle body (1); one end of a cylinder body (11) of the double-piston rod cylinder is provided with a cylinder barrel frame (12), and the other end of a piston rod (13) of the double-piston rod cylinder is positioned in the cylinder barrel frame (12); the bottom of the cylinder barrel frame (12) is provided with a lower lifting lug (15), and the lower lifting lug (15) is connected with the swing arm (5).

3. The suspension vibration energy driven brake system according to claim 2, further comprising a bump guard (14), wherein the other end of the piston rod (13) of the double piston rod cylinder is provided with the bump guard (14).

4. The suspension vibration energy driven brake system of claim 1, wherein the coupler assembly comprises an input drive shaft (20), a drive wheel a (19), an impeller (21), a drive wheel B (22), an oil chamber (25), and a drive wheel C (26); one end of the input transmission shaft (20) is connected with the output end of the hydraulic motor (18), and the other end of the input transmission shaft (20) is fixedly connected with the driving wheel A (19); an oil cavity (25) is arranged in the input transmission shaft (20), and the oil cavity (25) is communicated with an inlet of the hydraulic motor (18) and an inner groove of the transmission wheel C (26); the transmission wheel C (26) is in clearance fit with the input transmission shaft (20), and the transmission wheel C (26) can slide along the axial direction; the impeller (21) is positioned between the transmission wheel C (26) and the transmission wheel B (22), and the impeller (21) is in clearance fit in the transmission wheel B (22); the driving wheel B (22) is fixedly connected to the driving shaft (7).

5. The suspension vibration energy driven brake system according to claim 4, further comprising a return spring (24), the return spring (24) being located between the input drive shaft (20) and the drive wheel C (26) for returning the input drive shaft (20).