CN209146188U - A compound electromechanical brake - Google Patents

Abstract

A composite electro-mechanical brake, comprising a caliper, a left friction plate, a right friction plate, a brake disc, a driven electro-magnetic disc, an active electro-magnetic disc, a retaining ring, a return spring assembly, a piston, a brake pedal sensor, and a wheel speed sensor , controller; the wedge surface of the U-shaped notch of the piston is in contact with the wedge surface of the wedge plate on the driven electro-disk, which has a force-enhancing effect; the brake oil can enter from the oil inlet on the caliper to push the piston to the left, Then the piston pushes the right friction plate to compress the brake disc to generate braking, which has the effect of redundant design; the utility model adopts the redundant design mode, on the one hand, the kinetic energy of the vehicle can be fully utilized, and the force is taken by the electro-magnetic disc and the wedge-shaped force increase. Structure to drive the friction plate to press the brake disc for braking, on the other hand, use hydraulic pressure for braking, with double braking function, which can effectively save costs, reduce installation space, quickly respond to braking commands, shorten braking distance and improve Brake safety.

Description

A compound electromechanical brake

technical field

The utility model relates to an automobile brake, in particular to a compound electronic mechanical brake.

Background technique

In recent years, my country's new energy vehicles have developed rapidly. However, there are still many technical problems of new energy vehicles that have not been effectively solved. The key problem is the low driving range. However, it is not possible to increase the battery capacity simply by increasing the number of batteries. In order to improve the driving range of new energy vehicles, it is often solved by sacrificing the driver's riding comfort, such as removing the air conditioner. It is also an effective technical means to improve the driving range of new energy vehicles by reducing the power consumption of accessories.

At present, the vehicle braking system mainly adopts the hydraulic braking mode. The conventional fuel vehicle braking system uses the vacuum at the engine throat to assist the brake booster to reduce the driver's brake pedal operating force; while the new energy vehicle uses an additional vacuum pump to achieve brake assist. Increase the power, which will lead to additional consumption of electric energy, which will affect the driving range. The hydraulic brake system itself has certain drawbacks, such as: 1. The long brake pipeline leads to brake lag; 2. The brake fluid needs to be replaced, which increases pollution, etc.

The automotive industry believes that the use of brake-by-wire systems to replace conventional hydraulic brake systems is an inevitable trend. Compared with conventional hydraulic brake systems, brake-by-wire systems have more advantages: 1. Fast response speed, effectively shortening braking distance, and improving vehicle braking 2. Adopt control circuit to reduce the dependence on vehicle installation space.

The existing brake-by-wire system mainly uses the motor as the braking power source, and uses the deceleration mechanism to reduce the speed, increase the torque and transmit the power. It is often in a locked-rotor state during operation, which requires extremely high performance of the motor, which leads to high prices; at the same time, it is difficult to solve the contradiction between the motor torque and the structure size, which restricts the market promotion and application.

To sum up, how to solve the technical defects of the brake motor used in the brake-by-wire system is a key problem that needs to be solved urgently at present. Therefore, it is necessary to find another way to study a new type of wire-controlled brake.

SUMMARY OF THE INVENTION

Aiming at the shortcomings of the existing braking system, the utility model provides a composite electronic mechanical brake, which adopts a redundant design mode. On the one hand, the kinetic energy of the vehicle can be fully utilized. Drive the friction plate to press the brake disc for braking, on the other hand, use hydraulic pressure to brake, with double braking function, which can effectively save cost, reduce installation space, quickly respond to braking commands, shorten braking distance and improve braking safety.

The utility model is realized through the following technical measures:

A composite electro-mechanical brake, comprising a caliper, a left friction plate, a right friction plate, a brake disc, a driven electro-magnetic disc, an active electro-magnetic disc, a retaining ring, a return spring assembly, a piston, a brake pedal sensor, and a wheel speed sensor , controller; the caliper is installed on the frame, and the left friction plate and the right friction plate are respectively installed in the corresponding slots on the caliper to limit the rotation; the brake disc is installed on the left friction plate and the right friction plate. Between the friction plates, the braking gap between the brake disc and the left and right friction plates is 0.1mm to 1mm;

The piston cylinder on the caliper is provided with a U-shaped notch, and the opening direction is consistent with the U-shaped notch in the middle of the piston;

The middle of the piston is provided with a U-shaped notch, and the surface of the notch close to the friction plate is a wedge surface; the piston is installed in the guide hole of the caliper, and the left plane end of the piston is in contact with the back steel surface of the right friction plate. The wedge surface of the U-shaped notch of the piston is in contact with the wedge surface of the wedge plate on the driven electro-magnetic disk, which has a force-enhancing effect; the right side of the piston is installed on the sealing end of the piston cylinder on the caliper through the sealing ring, and the brake fluid can be removed from the caliper. The oil inlet on the caliper enters, pushing the piston to the left, and then the piston pushes the right friction pad to press the brake disc to generate braking, which has a redundant design effect;

The end cap on the brake disc is provided with a spline slot and a retaining ring slot; the driven electro-magnetic disc is mounted on the end cap through a bearing, and a return spring is installed between the driven electro-magnetic disc and the end cap The assembly is used to reset the driven electro-magnetic disc after braking; the wedge surface of the wedge-shaped plate on the driven electro-magnetic disc is in contact with the wedge surface of the U-shaped notch of the piston. When the driven electro-magnetic disc rotates, the wedge-shaped plate can push the piston Move to the left, and then push the right friction plate to press the brake disc to generate braking force. Since the wedge surface of the wedge plate and the wedge surface of the U-shaped notch of the piston are in contact with the wedge surface, it can increase the force;

The active electro-magnetic disk is splined to the end cap, the retaining ring is installed in the retaining ring notch of the end cap, and the retaining ring is used to limit the axial movement of the active electro-magnetic disk to the right; The installation gap between them is 0.5mm ~ 2mm;

The brake pedal sensor, wheel speed sensor, driven electro-magnetic disk, and active electro-magnetic disk are all electrically connected to the controller. The brake pedal sensor and the wheel speed sensor transmit the collected signals to the controller, and the controller controls the control according to the control strategy. The driven electro-magnetic disk and the active electro-magnetic disk are pulled together to transmit torque, and the torque is controlled by the control current.

Friction plates are installed on the driven electro-magnetic disk and the active electro-magnetic disk.

The active electro-magnetic disc is machined with spline teeth for matching with the spline grooves machined on the end cap on the brake disc.

An electromagnetic coil is installed on the driven electro-magnetic disk.

An electromagnetic coil is installed on the active electro-magnetic disk.

The beneficial effects of the present utility model are:

A composite electro-mechanical brake adopts a redundant design mode. On the one hand, it can make full use of the kinetic energy of the vehicle, and drive the friction pads to press the brake disc for braking through the method of taking power from the electro-magnetic disk and the wedge-shaped force-increasing structure, and on the other hand. Using hydraulic pressure for braking, with double braking function, can effectively save costs, reduce installation space, quickly respond to braking commands, shorten braking distance and improve braking safety. Compared with the prior art, it has the following beneficial effects:

1. Make full use of the kinetic energy of the vehicle, and push the friction pads to press the brake disc for braking by means of the electro-magnetic disk and the wedge-shaped force-increasing structure, which effectively solves the problem that the existing hydraulic braking system relies on vacuum to assist the braking force. technical problems; at the same time, it also solves the dependence of existing brake-by-wire systems on high-performance motors;

2. The hydraulic braking function is still retained. Due to the fast response speed of the electromagnetic braking, it can quickly push the piston to press the friction plate, improve the response speed, and shorten the braking distance. At the same time, it has a redundant function to realize hydraulic braking and electromagnetic braking. The dual function of dynamic and dynamic greatly improves the braking reliability, solves the problem of braking lag caused by the long braking pipeline of the existing hydraulic braking system, and improves the reliability of the braking system;

3. Effectively solve the problem of energy consumption caused by the long-term work of the accessories of new energy vehicles, and improve the driving mileage;

4. The brake-by-wire mode is adopted, which is convenient for system integration with ABS, EBD, etc.

Description of drawings

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

Figure 1 is a schematic structural diagram of the utility model.

Figure 2 is a schematic structural diagram of the utility model.

Figure 3 is a front view of the utility model.

Figure 4 is a left side view of the utility model.

Figure 5 is a top view of the utility model.

FIG. 6 is a schematic diagram of a part of the structure of the utility model.

FIG. 7 is a schematic diagram of a part of the structure of the utility model.

FIG. 8 is a schematic structural diagram of the driven electro-magnetic disk of the present invention.

FIG. 9 is a schematic structural diagram of the driven electro-magnetic disk of the present invention.

FIG. 10 is a schematic structural diagram of the active electro-magnetic disk of the present invention.

Figure 11 is a schematic diagram of the structure of the piston of the present invention.

FIG. 12 is a schematic structural diagram of the caliper of the present invention.

FIG. 13 is a schematic structural diagram of the caliper of the present invention.

FIG. 14 is a schematic structural diagram of the caliper of the present invention.

FIG. 15 is a schematic structural diagram of the active electro-magnetic disk of the present invention.

FIG. 16 is a schematic diagram of the principle of the control system of the present invention.

In the picture, 1-caliper, 101-piston cylinder, 102-oil inlet, 2-left friction plate, 3-right friction plate, 4-brake disc, 401-end cap, 5-driven electric disk, 501- Wedge plate, 6-active electro-magnetic disk, 7-retaining ring, 8-return spring assembly, 9-piston, 10-brake pedal sensor, 11-wheel speed sensor, 12-controller.

Detailed ways

In order to clearly illustrate the technical features of the solution, the solution will be described below through a specific implementation manner in conjunction with the accompanying drawings.

A composite electro-mechanical brake, comprising a caliper 1, a left friction plate 2, a right friction plate 3, a brake disc 4, a driven electro-magnetic disc 5, an active electro-mechanical disc 6, a retaining ring 7, a return spring assembly 8, and a piston 9 , brake pedal sensor 10, wheel speed sensor 11, controller 12; the caliper 1 is installed on the frame, and the left friction plate 2 and the right friction plate 3 are respectively installed in the corresponding slots on the caliper 1, In order to limit the rotation; the brake disc 4 is installed between the left friction plate 2 and the right friction plate 3, and the braking gap between the brake disc 4 and the left friction plate 2 and the right friction plate 3 is 0.1mm~1mm;

The piston cylinder 101 on the caliper 1 is provided with a U-shaped notch, and the opening direction is consistent with the U-shaped notch in the middle of the piston 9;

The middle of the piston 9 is provided with a U-shaped notch, and the surface of the notch close to the friction plate 3 is a wedge surface; The back steel is in surface-to-surface contact, and the wedge surface of the U-shaped notch of the piston 9 is in contact with the wedge surface of the wedge plate 501 on the driven electro-magnetic disk 5, which has a force-enhancing effect; the right side of the piston 9 is installed on the caliper 1 through the sealing ring. At the sealing end of the piston cylinder 101, the brake oil can enter from the oil inlet 102 on the caliper 1 to push the piston 9 to the left;

The end cap 401 on the brake disc 4 is provided with a spline notch and a retaining ring notch; the driven electro-magnetic disc 5 is mounted on the end cap 401 through a bearing, and the driven electro-magnetic disc 5 and the end cap 401 are connected. A return spring assembly 8 is installed between the two sides, which is used to reset the driven electro-magnetic disk 5 when braking ends; the wedge surface of the wedge-shaped plate 501 on the driven electro-magnetic disk 5 is in contact with the wedge surface of the U-shaped notch of the piston When the electromechanical disk 5 rotates, the wedge plate 501 can push the piston 9 to the left, and then push the right friction plate 3 to press the brake disk 4 to generate braking force. The surface adopts wedge surface contact, so it can play a force-enhancing effect;

The active electro-magnetic disk 6 is splined to the end cap 401, the retaining ring 7 is installed in the retaining ring notch of the end cap 401, and the retaining ring 7 is used to limit the axial movement of the active electro-magnetic disk 6 to the right; the driven The installation gap between the electro-magnetic disk 5 and the active electro-magnetic disk 6 is 0.5mm～2mm;

The brake pedal sensor 10, the wheel speed sensor 11, the driven electro-magnetic disk 5, and the active electro-magnetic disk 6 are all electrically connected to the controller 12, and the brake pedal sensor 10 and the wheel speed sensor 11 transmit the collected signals to the controller 12. The controller 12 controls the driven electro-magnetic disk 5 and the active electro-magnetic disk 6 to pull in to transmit torque according to the control strategy, and the torque is controlled by the control current.

Friction plates are installed on the driven electro-magnetic disk 5 and the active electro-magnetic disk 6 .

The active electro-magnetic disc 6 is machined with spline teeth for matching with the spline grooves machined on the end cap 401 on the brake disc 4 .

An electromagnetic coil is installed on the driven electro-magnetic disk 5 .

An electromagnetic coil is installed on the active electro-magnetic disk 6 .

When the vehicle is braking, the brake pedal sensor 10 and the wheel speed sensor 11 transmit the collected signals to the controller 12, and the controller 12 controls the driven electro-magnetic disk 5 and the active electro-magnetic disk 6 to pull in to transmit torque according to the control strategy. Controlled by the control current; the active electro-magnetic disc 6 drives the driven electro-magnetic disc 5 to rotate, and the driven electro-magnetic disc 5 drives the wedge-shaped plate 501 on it to push the piston 9 to the left, and then the piston 9 pushes the right friction plate 3 to press the brake disc 4 Brake is generated; when a circuit failure occurs, continue to step on the brake pedal, the conventional hydraulic brake fluid will enter the oil inlet 102 on the caliper 1, and push the piston 9 to the left; the piston 9 pushes the right friction plate 3 to press the brake The disc 4 generates braking, which has the effect of redundant design;

When the braking ends, the controller 12 disconnects the control current of the driven electro-magnetic disk 5 and the active electro-magnetic disk 6, the driven electro-magnetic disk 5 and the active electro-magnetic disk 6 are separated, and the return spring group 7 makes the driven electro-magnetic disk 5 reset, and then The driven electro-magnetic disk 5 drives the wedge plate 501 to reset, and the braking force is released.

Although the preferred examples of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Under the inspiration of the present utility model, the skilled person can also make many forms without departing from the scope of the present utility model and the protection scope of the claims, and these all belong to the protection scope of the present utility model.

Claims (5)

1. a kind of composite electronic mechanical brake, including clamp (1), left friction plate (2), right friction plate (3), brake disc (4), Driven electromagnetic disc (5), active electromagnetic disc (6), retaining ring (7), return spring component (8), piston (9), brake pedal sensor (10), wheel speed sensors (11), controller (12)；It is characterized by: the clamp (1) are mounted on vehicle frame, left friction plate (2), right friction plate (3) is separately mounted in the notch being adapted to therewith on clamp (1), to carry out rotary spacing；Brake disc (4) peace Braking between left friction plate (2), right friction plate (3), between brake disc (4) and left friction plate (2), right friction plate (3) Gap is 0.1mm~1mm；

Piston cylinder (101) on the clamp (1) is provided with U type slot, the U type slot one in the middle part of opening direction and piston (9) It causes；

U type slot is provided in the middle part of the piston (9), notch is wedge surface close to the face of right friction plate (3)；Piston (9) is mounted on In the pilot hole of clamp (1), the left side plane end of piston (9) and the back steel plane-plane contact of right friction plate (3), the U of piston (9) Type groove mouth wedge surface is contacted with clapboard (501) wedge surface on driven electromagnetic disc (5), plays reinforcement effect；The right side of piston (9) is logical Piston cylinder (101) sealed end that sealing ring is mounted on clamp (1) is crossed, braking oil liquid can be from the oil inlet on clamp (1) (102) enter, piston (9) is pushed to move to left, and then piston (9) pushes right friction plate (3) to compress brake disc (4) generation braking, rises To Redundancy Design effect；

Spline notch and retaining ring notch are provided in end cap (401) on the brake disc (4)；The driven electromagnetic disc (5) is logical It crosses bearing to be mounted on end cap (401), be equipped with return spring component (8) between driven electromagnetic disc (5) and end cap (401), used It is resetted when driven electromagnetic disc (5) end of braking；The wedge surface of clapboard (501) on driven electromagnetic disc (5) and the U of piston (9) The wedge surface face contact of type groove mouth, when driven electromagnetic disc (5) rotates, clapboard (501) can push piston (9) to move to left, and then push away It moves right friction plate (3) and compresses brake disc (4) generation brake force, due to the wedge surface of clapboard (501) and the U type slot of piston (9) Wedge surface using wedge surface contact, so reinforcement effect can be played；

The active electromagnetic disc (6) is connect with end cap (401) spline, and retaining ring (7) is mounted on the retaining ring notch of end cap (401) In, retaining ring (7) moves axially to the right for limiting active electromagnetic disc (6)；The driven electromagnetic disc (5), active electromagnetic disc (6) Between installation gap be 0.5mm~2mm；

The brake pedal sensor (10), wheel speed sensors (11), driven electromagnetic disc (5), active electromagnetic disc (6) are and control The signal of acquisition is passed to controller (12) by device (12) electrical connection processed, brake pedal sensor (10), wheel speed sensors (11), Controller (12) controls driven electromagnetic disc (5) according to control strategy, active electromagnetic disc (6) is attracted to transmit torque, torque By control current control.

2. a kind of composite electronic mechanical brake as described in claim 1, it is characterised in that: the driven electromagnetic disc (5), friction plate is mounted in active electromagnetic disc (6).

3. a kind of composite electronic mechanical brake as described in claim 1, it is characterised in that: the active electromagnetic disc (6) spline tooth is machined on, for matching with the spline processed in the end cap (401) on brake disc (4).

4. a kind of composite electronic mechanical brake as described in claim 1, it is characterised in that: the driven electromagnetic disc (5) electromagnetic coil is installed on.

5. a kind of composite electronic mechanical brake as described in claim 1, it is characterised in that: the active electromagnetic disc (6) electromagnetic coil is installed on.