CN112498320A - Double-piston electronic parking actuating mechanism for vehicle and vehicle - Google Patents

Abstract

The application discloses two piston electron parking actuating mechanism and vehicle for vehicle, two piston electron parking actuating mechanism include: a power source; the differential mechanism is provided with a differential mechanism input end and two differential mechanism output ends, the differential mechanism input end is in power connection with the power source, and the differential mechanism output ends are in power connection with two parking pistons of the vehicle; wherein the differential is configured to differentially distribute power from the power source to the two differential outputs when the two parking pistons are not stressed simultaneously. According to the application, the double-piston electronic parking actuating mechanism is simplified, two independent power transmission systems are developed into one power transmission system, and two parking pistons of a brake are controlled simultaneously.

Description

Double-piston electronic parking actuating mechanism for vehicle and vehicle

Technical Field

The application relates to the technical field of vehicles, in particular to a double-piston electronic parking actuating mechanism for a vehicle and the vehicle.

Background

In the prior art, the power transmission mechanism of the double-piston brake caliper is two independent power output transmission mechanisms, namely two power output motors and two independent power transmission mechanisms, which respectively drive two pistons of a brake to provide braking force. The disadvantages of the prior art are as follows:

1 the electric control system has complex structure, great control difficulty and high cost. Because two sets of power transmission systems need to be controlled simultaneously and two pistons need to achieve the same clamping force, the control logic is complex, the requirement on control precision is high, and more precise electrical elements are needed;

2 the mechanical structure is complicated and the number of parts is large. Because two independent power transmission systems are needed, compared with a power transmission mechanism of a single-piston brake, the number and the cost of parts are increased, and the two power transmission systems are required to have higher part precision and consistency, so that the efficiency of the two power transmission systems is ensured to be always high, and the two pistons reach the same clamping force.

3 parts are high in manufacturing cost. Because two motors, two sets of wiring harness plug connectors, two sets of speed reducing and torque increasing mechanisms, two sets of shells and sealing mechanisms are needed, the cost is obviously increased.

4 the weight is large, the occupied volume is large, the space arrangement is limited, the two sets of power transmission systems are separately arranged and independently installed, the occupied space is large, and the two brakes with the pistons at a short distance cannot be arranged.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art. To this end, an object of the present application is to provide a dual-piston electronic parking actuator for a vehicle, which is simplified and developed from two separate power transmission systems into one power transmission system while controlling two parking pistons of a brake.

The application also provides a vehicle with the double-piston electronic parking actuating mechanism.

The double-piston electronic parking actuator for a vehicle according to the present application includes: a power source; the differential mechanism is provided with a differential mechanism input end and two differential mechanism output ends, the differential mechanism input end is in power connection with the power source, and the differential mechanism output ends are in power connection with two parking pistons of the vehicle; wherein the differential is configured to differentially distribute power from the power source to the two differential outputs when the two parking pistons are not stressed simultaneously.

According to the double-piston electronic parking executing mechanism for the vehicle, only one power source is adopted, the power of the power source is distributed to two parking pistons through the differential mechanism, the power transmission mechanism of the double-piston brake of the vehicle is simplified, two sets of independent power transmission systems are developed into one set of power transmission system, two parking pistons of the brake are controlled simultaneously, the differential function is achieved, the same clamping force can be achieved when the power transmission mechanism is tightened, compared with other double-piston brake power transmission mechanisms, the manufacturing cost is lower, and the occupied space is smaller.

According to an embodiment of the present application, the dual-piston electronic parking actuator further includes: the first-stage transmission mechanism is provided with a first input end and a first output end, the first input end is connected with the power source, and the first output end is connected with the input end of the differential mechanism.

According to an embodiment of the present application, the dual-piston electronic parking actuator further includes: and two second-stage transmission mechanisms are provided, each second-stage transmission mechanism is provided with a second input end and a second output end, each second input end is connected with the corresponding differential output end, and each second output end is connected with the corresponding parking piston.

According to one embodiment of the application, the first stage transmission comprises: the first worm is connected with the power source; and the first worm wheel is meshed with the first worm and is connected with the input end of the differential.

According to one embodiment of the application, the differential comprises: a planet carrier fixed to the first worm gear; first and second planet gears each rotatably disposed on the planet carrier; the number of the sun gears is two, each sun gear is meshed with the first planetary gear and the second planetary gear respectively, and each sun gear is connected with the corresponding second input end respectively.

According to an embodiment of the present application, the dual-piston electronic parking actuator further includes: two locking mechanisms, wherein each locking mechanism is arranged between the differential mechanism and the corresponding parking piston, and the locking mechanisms are configured to output power to the parking pistons through the first planetary gears and the second planetary gears when the parking piston cylinders perform clamping actions and output power to the planetary gear carrier through the parking pistons when the parking piston cylinders perform releasing actions.

According to an embodiment of the application, the first planet gear, the second planet gear, and both sun gears are bevel gears.

According to one embodiment of the application, a first mounting surface and a second mounting surface which are opposite to each other are arranged on the inner circumferential surface of the first worm wheel, a first mounting hole is formed in the first mounting surface, and a second mounting hole is formed in the second mounting surface; the planet gear carrier is provided with a first mounting shaft and a second mounting shaft, the first mounting shaft is matched with the first mounting hole, and the second mounting shaft is matched with the second mounting hole.

According to one embodiment of the application, the second stage transmission comprises: the sun gear is arranged at one end of the second worm; and the second worm wheel is meshed with the first worm, and the second worm wheel is connected with the corresponding parking piston.

According to an embodiment of the application, the locking mechanism is configured as a one-way bearing provided between the one end corresponding to the second worm and the planet carrier, the one-way bearing being configured to rotate one way when the parking piston cylinder performs a clamping action and to lock when the parking piston cylinder performs a releasing action.

According to one embodiment of the application, the planet gear carrier is provided with a positioning hole, and one end of the second worm is provided with a positioning pin matched with the positioning hole.

According to an embodiment of the application, the central axis of the positioning hole coincides with the central axis of the first worm wheel.

According to one embodiment of the application, the second worm wheel is connected with the corresponding parking piston through a thread rolling screw.

According to an embodiment of the present application, the dual-piston electronic parking actuator further includes: the first transmission mechanism, the second transmission mechanism and the differential mechanism are arranged in the shell, and a bearing is arranged between the other end of the second worm and the shell.

The vehicle according to the application comprises the double-piston electronic parking actuating mechanism, and the vehicle is provided with the double-piston electronic parking actuating mechanism, so that the vehicle is simple in control logic, low in requirement on electrical elements and simple in structure, the production efficiency of the vehicle is greatly improved, and the manufacturing cost of the vehicle is reduced.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of a dual piston electronic parking actuator according to an embodiment of the present application;

FIG. 2 is a schematic illustration of a power source, a primary drive mechanism, a differential, and a secondary drive mechanism according to an embodiment of the present application;

FIG. 3 is a schematic view of a planet carrier according to an embodiment of the present application;

FIG. 4 is a schematic view of a first worm gear according to an embodiment of the present application;

fig. 5 is a diagram of a second worm in cooperation with a sun gear according to an embodiment of the present application.

Reference numerals: a dual-piston electronic parking actuator 100,

the differential 110, the planet carrier 111, the first mounting shaft 111a, the first planet gears 112, the second planet gears 113, the sun gear 114, the positioning hole 103,

a first-stage transmission mechanism 120, a first worm 121, a first worm wheel 122, a first mounting surface 101, a first mounting hole 102,

a second-stage transmission 130, a second worm 131, a second worm wheel 132, a positioning pin 131a,

a housing 140, a power source 150, and a one-way bearing 160.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

A dual piston electronic parking actuator 100 for a vehicle according to an embodiment of the present application is described below with reference to fig. 1 to 5.

The dual-piston electronic parking actuator 100 for a vehicle according to an embodiment of the present application includes: a power source 150 and a differential 110.

The power source 150 of the present application is only one, the power source 150 may provide power to two parking pistons at the same time, and the power source 150 may be a driving motor, although the power source 150 of the present application is not limited thereto.

Differential 110 has a differential input that is in power connection with power source 150 and two differential outputs that are in power connection with two parking pistons of the vehicle. Differential 110 may distribute power from power source 150 to both parking pistons, with differential 110 configured to distribute power from power source 150 differently to both differential outputs when the two parking pistons are not stressed simultaneously.

According to the double-piston electronic parking executing mechanism 100 for the vehicle, only one power source 150 is adopted, and the power of the power source 150 is distributed to two parking pistons through the differential 110, so that the power transmission mechanism of the double-piston brake of the vehicle is simplified, two independent power transmission systems are developed into one power transmission system, the two parking pistons of the brake are controlled simultaneously, the differential function is achieved, the same clamping force can be achieved when the double-piston electronic parking executing mechanism is tightened, and compared with other double-piston brake power transmission mechanisms, the double-piston electronic parking executing mechanism 100 is lower in manufacturing cost and smaller in occupied space.

In addition, the control center of the vehicle of the present application controls only one power source 150 (e.g., motor), the control logic is simple, and the requirements for electrical components are low. This application uses a motor to provide power for two parking pistons, and mechanical structure is simple, and part quantity is few. The corresponding power source 150, the wire harness plug connector, the speed reducing mechanism and the shell mechanism are all only one set. In addition, the double-piston electronic parking actuating mechanism 100 is compact in structure and convenient to spatial arrangement and application and popularization.

In an embodiment of the present application, as shown in fig. 2, the dual-piston electronic parking actuator 100 further includes: a first stage drive 120, the first stage drive 120 having a first input connected to the power source 150 and a first output connected to the differential input.

Further, the dual-piston electronic parking actuator 100 further includes: two second stage gear mechanisms 130, each second stage gear mechanism 130 having a second input and a second output, each second input being connected to a corresponding differential output.

First stage 120 may transfer power from power source 150 to differential 110, while second stage 130 may transfer power distributed by differential 110 to the corresponding parking piston.

Each first stage gear 120 comprises a first worm 121 and a first worm wheel 122, the first worm 121 being connected to the power source 150, the first worm wheel 122 being in mesh with the first worm 121 and the first worm wheel 122 being connected to the differential input. The first worm 121 is a first input and the first worm gear 122 is a second input. The differential input end may be a driving gear on the differential housing, and in the embodiment of the present application, the first worm gear 122 and the driving gear on the differential housing are the same component, so as to further simplify the structure of the dual-piston electronic parking actuator 100, so that the dual-piston electronic parking actuator 100 has a simple mechanical structure and a small number of parts.

Further, the helix angle of the first worm 121 or the first worm wheel 122 is smaller than the friction angle. Thus, the first stage transmission 120 can be made a self-locking mechanism.

In some embodiments of the present application, as shown in FIG. 2, differential 110 includes: a planet carrier 111, first planet gears 112, second planet gears 113, and a sun gear 114.

The planet carrier 111 is fixed on the first worm gear 122, the planet carrier 111 can rotate along with the rotation of the first worm gear 122, and the first planet gear 112 and the second planet gear 113 are both rotatably arranged on the planet carrier 111; the number of the sun gears 114 is two, each sun gear 114 is meshed with the first planetary gear 112 and the second planetary gear 113, and each sun gear 114 is connected with the corresponding second input end, and the sun gear 114 is the differential output end.

When the two parking pistons are equally stressed, the first and second planetary gears 112 and 113 do not rotate, and the planetary gear carrier 111 rotates as the first worm gear 122 rotates, thereby uniformly distributing the power output from the power source 150 to the two parking pistons. When the two parking pistons are stressed differently, the first planetary gear 112 and the second planetary gear 113 rotate, so that the power output by the power source 150 can be distributed differently to the two differential outputs.

Specifically, the differential 110 includes a carrier 111 and first and second planetary gears 112 and 113 rotatably disposed on the carrier 111, the carrier 111 being in power connection with the power source 150, and the first and second planetary gears 112 and 113 being in power connection with two parking pistons of the vehicle.

The double-piston electronic parking actuator 100 further includes two lock mechanisms each provided between the differential and the corresponding parking piston, the lock mechanisms being configured to output power from the first and second planetary gears 112 and 113 to the parking piston when the parking piston cylinder performs a clamping action, and to output power from the parking piston to the carrier 111 when the parking piston cylinder performs a releasing action.

That is, the power transmission when the piston cylinder performs the clamping action and the power transmission when the parking piston cylinder performs the releasing action are not completely opposite. When the parking piston cylinder performs a clamping action, the power source 150 needs to provide power for the parking piston, and at the moment, the power can be transmitted to the parking piston through the first planetary gear 112 and the second planetary gear 113, so that the power of the power source 150 is distributed to the two parking pistons in a differential manner when the two parking pistons are stressed differently, and finally the two parking pistons can reach almost the same clamping force; when the parking piston cylinder performs a release action, the power of the two parking pistons is not transmitted to the planet carrier 111 differently, but the two parking pistons are synchronized and transmit the same power to the planet carrier 111, and the displacement of the two parking pistons is also the same.

Further, the first planetary gears 112, the second planetary gears 113, and the two sun gears 114 are all bevel gears. Therefore, the overall size of the double-piston electronic parking actuator 100 can be reduced, and the power can change directions in the power transmission process.

As shown in fig. 3, the inner peripheral surface of the first worm wheel 122 is provided with a first mounting surface 101 and a second mounting surface (not shown) which are opposite to each other, the first mounting surface 101 is provided with a first mounting hole 102, and the second mounting surface is provided with a second mounting hole (not shown); the planet carrier 111 is provided with a first mounting shaft 111a and a second mounting shaft, the first mounting shaft 111a is fitted to the first mounting hole 102, and the second mounting shaft is fitted to the second mounting hole. Thus, the carrier 111 can be firmly attached to the first worm wheel 122, ensuring that the carrier 111 rotates with the rotation of the first worm wheel 122. Preferably, the center of the planet carrier 111 coincides with the center of the first worm gear 122.

In some embodiments of the present application, the second stage gear 130 includes a second worm 131 and a second worm wheel 132, one end of the second worm 131 is provided with the sun gear 114, the second worm wheel 132 is engaged with the first worm 121, and the second worm 131 is connected with the corresponding parking piston. The second stage transmission mechanism 130 can transmit the power distributed by the differential 110 to the corresponding parking piston, and meanwhile, the second stage transmission mechanism 130 can achieve the effects of reducing the speed and increasing the torque, so that the braking force of the parking piston is improved. It should be noted that the second worm 131 is a second input end, and the second worm wheel 132 is a second output end.

The lock mechanism is configured as a one-way bearing 160, the one-way bearing 160 being provided between one end of the corresponding second worm and the carrier 111, the one-way bearing 160 being configured to rotate in one direction when the parking piston cylinder performs a clamping action and to be locked when the parking piston cylinder performs a releasing action.

That is, when the parking piston cylinder performs a clamping action, the power source 150 needs to provide power to the parking piston, and the one-way bearing 160 can rotate, so that the power of the planet carrier 111 is not directly transmitted to the two second worms 131, and at this time, the power can be transmitted to the corresponding second worm 131 through the first planet gear 112 and the second planet gear 113 and the corresponding sun gear, so that the power of the power source 150 is differentially distributed to the two sun gears when the two parking pistons are stressed differently, and finally, the two parking pistons can reach almost the same clamping force; when the parking piston cylinder performs a releasing action, the one-way bearing 160 is locked, the power of the two parking pistons is not transmitted to the first planetary gear 112 and the second planetary gear 113 through the second worm 131 and the sun gear 114, but is directly transmitted to the planet carrier 111 through the second worm 131, the two parking pistons are synchronous and transmit the same power to the planet carrier, and the displacement of the two parking pistons is also the same.

According to some embodiments of the present application, as shown in fig. 3, the planet carrier 111 is provided with a positioning hole 103, and one end of the second worm 131 is provided with a positioning pin 131a that is engaged with the positioning hole 103. Accordingly, the second worm 131 can be positioned with respect to the carrier 111 first when mounted, and the overall mounting efficiency of the dual-piston electronic parking actuator 100 is improved.

Further, the center axis of the positioning hole 103 coincides with the center axis of the first worm wheel 122, whereby it can be ensured that the power transmitted to the first worm wheel 122 can be stably distributed to the two second worms 131 through the planetary gear, the carrier, and the sun gear 114.

According to some embodiments of the present application, the second worm gear 132 is connected to the corresponding parking piston through a thread rolling screw, thereby ensuring that the parking piston can reciprocate in the axial direction, and achieving the parking action and the contact parking action.

It should be noted that, in the embodiment of the present application, if the dual-piston electronic parking actuator employs the one-way bearing 60, the thread rolling screw is configured to be a self-locking structure, so that the parking piston does not retract when performing a clamping operation, thereby improving the parking stability.

The double-piston electronic parking actuator 100 of the embodiment of the application further comprises a housing 140, the first-stage transmission mechanism 120, the second-stage transmission mechanism 130 and the differential 110 are all arranged in the housing 140, and a bearing is arranged between the other end of the second worm 131 and the housing. Thereby ensuring that the second worm 131 can smoothly rotate with respect to the housing.

The vehicle of the embodiment of the present application is briefly described below.

The vehicle according to the embodiment of the application comprises the double-piston electronic parking actuating mechanism 100 according to the embodiment, and the vehicle according to the application is provided with the double-piston electronic parking actuating mechanism 100, so that the vehicle is simple in control logic, low in requirement on electrical components and simple in structure, the production efficiency of the vehicle is greatly improved, and the manufacturing cost of the vehicle is reduced.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (15)

1. A dual piston electronic parking actuator (100) for a vehicle, comprising:

a power source (150);

a differential (110), said differential (110) having a differential input and two differential outputs, said differential input being in power connection with said power source (150), said differential output being in power connection with two parking pistons of said vehicle; wherein

The differential (110) is configured to differentially distribute power from the power source (150) to the two differential outputs when the two parking pistons are not stressed simultaneously.

2. The dual-piston electronic parking actuator (100) for a vehicle according to claim 1, further comprising: a first stage drive (120), the first stage drive (120) having a first input and a first output, the first input coupled to the power source (150), the first output coupled to the differential input.

3. The dual-piston electronic parking actuator (100) for a vehicle according to claim 2, further comprising: two second-stage transmission mechanisms (130), wherein each second-stage transmission mechanism (130) is provided with a second input end and a second output end, each second input end is connected with the corresponding differential output end, and each second output end is connected with the corresponding parking piston.

4. The dual-piston electronic parking actuator (100) for a vehicle according to claim 3, wherein the first stage transmission mechanism (120) comprises:

a first worm (121), said first worm (121) being connected to said power source (150);

a first worm wheel (122), the first worm wheel (122) being in mesh with the first worm (121) and the first worm wheel (122) being connected to the differential input.

5. The dual-piston electronic parking actuator (100) for a vehicle according to claim 4, wherein the differential (110) comprises:

a planet carrier (111), wherein the planet carrier (111) is fixed on the first worm gear (122);

a first planetary gear (112) and a second planetary gear (113), the first planetary gear (112) and the second planetary gear (113) each being rotatably provided on the planetary carrier (111);

the number of the sun gears (114) is two, each sun gear (114) is meshed with the first planetary gear (112) and the second planetary gear (113), and each sun gear (114) is connected with the corresponding second input end.

6. The dual-piston electronic parking actuator (100) for a vehicle according to claim 5, further comprising: two and each disposed between the differential and the corresponding parking piston, the lock mechanism being configured to output power from the first and second planetary gears (112, 113) to the parking piston when the parking piston cylinder performs a clamping action, and to output power from the parking piston to the carrier (111) when the parking piston cylinder performs a releasing action.

7. The dual-piston electronic parking actuator (100) for a vehicle according to claim 5, wherein the first planetary gear (112), the second planetary gear (113), and both of the sun gears (114) are bevel gears.

8. The double-piston electronic parking actuator (100) for a vehicle according to claim 5, wherein a first mounting surface (101) and a second mounting surface facing each other are provided on an inner peripheral surface of the first worm wheel (122), the first mounting surface (101) is provided with a first mounting hole (102), and the second mounting surface is provided with a second mounting hole;

the planet gear carrier (111) is provided with a first mounting shaft (111a) and a second mounting shaft, the first mounting shaft (111a) is matched with the first mounting hole (102), and the second mounting shaft is matched with the second mounting hole.

9. The dual-piston electronic parking actuator (100) for a vehicle according to claim 6, wherein the second stage transmission mechanism (130) comprises:

a second worm (131), one end of the second worm (131) being provided with the sun gear (114);

a second worm gear (132), the second worm gear (132) being engaged with the first worm (121), the second worm gear (132) being connected to the corresponding parking piston.

10. The dual-piston electronic parking actuator (100) for a vehicle according to claim 9, wherein the lock mechanism is configured as a one-way bearing (160), the one-way bearing (160) being provided between the one end corresponding to the second worm and the planetary carrier (111), the one-way bearing (160) being configured to rotate unidirectionally when the parking piston cylinder performs the clamping action and to be locked when the parking piston cylinder performs the releasing action.

11. The double-piston electronic parking actuator (100) for a vehicle according to claim 9, wherein a positioning hole (103) is provided on the planet carrier (111), and a positioning pin (131a) engaged with the positioning hole (103) is provided at one end of the second worm (131).

12. The dual piston electronic parking actuator (100) for a vehicle according to claim 9, wherein a central axis of the positioning hole (103) coincides with a central axis of the first worm gear (122).

13. The dual-piston electronic parking actuator (100) for a vehicle according to claim 9, wherein the second worm gear (132) is connected to the corresponding parking piston through a thread rolling screw.

14. The dual-piston electronic parking actuator (100) for a vehicle according to claim 9, further comprising: the first transmission mechanism, the second transmission mechanism and the differential (110) are arranged in the shell (140), and a bearing is arranged between the other end of the second worm (131) and the shell (140).

15. A vehicle, characterized by comprising a dual-piston electronic parking actuator (100) according to any of claims 1-14.

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