A distributed electromechanical brake actuator based on a gear push shaft lever

Abstract

The application provides a distributed electronic mechanical brake actuator based on a gear push shaft type lever, which mainly comprises a power transmission mechanism, a gear push shaft type lever mechanism, a mounting base and a motor arranged on a vehicle body; during braking, the motor rotates to drive the bevel gear set to rotate through the power transmission mechanism; the first lever is driven by the second bevel gear to make the first lever push block translate backward to drive the front brake caliper to make the front brake pad press against the brake disc; the second lever is driven by the second bevel gear to make the second lever push block translate forward to drive the rear brake caliper to make the rear brake pad press against the brake disc; thus, the braking force is applied, and the braking force can be adjusted by adjusting the motor torque; the scheme can effectively reduce the unsprung mass of the vehicle, improve the working environment of the motor, and improve the ride comfort, the steering stability and the driving safety of the vehicle, and provides a solution for the traditional brake system and the active brake, and provides an important support for the intelligent chassis.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile braking, and particularly relates to a distributed electronic mechanical brake actuator based on a gear push shaft type lever. BACKGROUND

[0002] Automobiles are entering the era of "new four modernizations" represented by "intelligentization, networking, sharing and electrification"; the intelligent chassis is an important support for the development of automobile intelligentization and electrification, and the brake-by-wire system is a key component of the intelligent chassis; as described in the document "Rear-Drive Full-Electric Independent Drive-Braking Electric Vehicle Yaw Stability Control" (Yang Kun, Jie Wang, etc. Rear-Drive Full-Electric Independent Drive-Braking Electric Vehicle Yaw Stability Control [J]. Journal of Xi'an Jiaotong University, 2019, 53(01): 44-51.), the electronic mechanical brake system has the characteristics of known brake force size, small hysteresis and precise control, and is convenient for integration of ABS / TCS / ESP control systems; therefore, the research on the electronic mechanical brake system can promote the development of automobile electrification and intelligentization.

[0003] Although the electronic mechanical brake system is the future trend of brake-by-wire technology, there are still some problems; for example, the scheme proposed in "A Bidirectional Force Amplification Type Electronic Mechanical Brake Actuator Based on Double-Sided Eccentric Wheels" (Yang Kun, Nie Mengwen, Wang Jie, etc. A Bidirectional Force Amplification Type Electronic Mechanical Brake Actuator Based on Double-Sided Eccentric Wheels [P]. ZL202111066943.0) reduces the size and mass of the electronic mechanical brake actuator to a certain extent, but the unsprung mass of the automobile is still relatively large, and the working environment of the motor is very poor; the increase of the unsprung mass will deteriorate the ground adhesion of the vehicle, thereby affecting the handling stability of the vehicle, and the increase of the unsprung mass will also increase the inertia, thereby affecting the driving safety of the vehicle.

[0004] In the early 21st century, China began to study the brake-by-wire system, so the research on the electronic mechanical brake system is still in the exploratory stage; the key problems at present are concentrated on how to reduce the mass of the electronic mechanical brake actuator and make the electronic mechanical brake actuator more safe and reliable; in view of the above problems, the present application proposes a new type of electronic mechanical brake actuator on the basis of the previous research, adopts a distributed structure, arranges the motor on the vehicle body, uses a power transmission mechanism to transmit the rotational torque of the motor, reduces the unsprung mass of the automobile, improves the working environment of the motor, improves the ride comfort, handling stability and driving safety of the automobile, and provides an important support for the development of the intelligent chassis. SUMMARY

[0005] The present application provides a distributed electronic mechanical brake actuator based on a gear push shaft type lever, which is characterized by a power transmission mechanism, a gear push shaft type lever mechanism, a mounting base and a motor arranged on the vehicle body.

[0006] As shown in Figure 1 , 15 , the power transmission mechanism comprises a first three-pivot universal joint (4), a transmission shaft (5) and a second three-pivot universal joint (6).

[0007] The gear push-shaft type lever mechanism comprises a first bevel gear (11), a second bevel gear (13), a first push-shaft (49), a second push-shaft (50), a first lever (12) and a second lever (20).

[0008] As shown in Figures 1-3 , the motor (1) is a rotary motor, and the motor shaft (3) is provided with external splines; the motor (1) is provided with four motor fixing holes (2), which serve to fix the motor to the vehicle body, and the number is not limited to four.

[0009] The reset spring (16) is arranged between the third side plate (42) and the front brake caliper (15), and the axis is perpendicular to the third side plate front end surface (E1), the number is not limited to two, and the type is not limited to a spiral spring.

[0010] As shown in Figures 4-14 , the mounting base comprises a first side plate (40), a second side plate (41), a bottom plate (26), a third side plate (42), a front plate (39) and an end cover (7).

[0011] As shown in Figures 4-8 , the first side plate left end surface (C1) is provided with a first rotating shaft mounting hole (32), a first lever mounting hole (33) and a third lever mounting hole (34), and the first side plate left end surface (C1) is provided with a third front brake caliper guide rail (29) and a fourth front brake caliper guide rail (30). The third front brake caliper guide rail (29) and the fourth front brake caliper guide rail (30) are both cuboid structures, and the third front brake caliper guide rail (29) and the fourth front brake caliper guide rail (30) are fixedly connected to the first side plate left end surface (C1).

[0012] As shown in Figures 4-8 , the second side plate right end surface (D3) is provided with a second rotating shaft mounting hole (44), a second lever mounting hole (45) and a fourth lever mounting hole (46).

[0013] As shown in Figures 4-8 , the third side plate (42) is a cuboid structure, the third side plate front end surface (E1) is coplanar with the bottom plate rear end surface (F5), and the third side plate lower end surface (E3) is coplanar with and fixedly connected to the bottom plate upper end surface (F2).

[0014] As shown in Figures 4-8As shown in FIG. 11, the bottom plate (26) comprises a first support rod (17), a first rear brake caliper guide rail (31) and a first front brake caliper guide rail (43), and the first rear brake caliper guide rail (31) and the first front brake caliper guide rail (43) are both cuboid structures.

[0015] As shown in FIG. 11, the front plate (39) is provided with a first brake caliper through slot (27) and a second brake caliper through slot (28), and both the first brake caliper through slot (27) and the second brake caliper through slot (28) are rectangular through slots. Figures 4-10

[0016] As shown in FIG. 11, the front plate (39) is provided with a first brake caliper through slot (27) and a second brake caliper through slot (28), and both the first brake caliper through slot (27) and the second brake caliper through slot (28) are rectangular through slots. Figures 7-14 As shown in FIG. 11, the front plate (39) is provided with a first brake caliper through slot (27) and a second brake caliper through slot (28), and both the first brake caliper through slot (27) and the second brake caliper through slot (28) are rectangular through slots.

[0017] Figure 1 、 15 As shown in FIG. 11, the first three-pivot universal joint (4) and the second three-pivot universal joint (6) are provided with inner splines and outer splines, the first bevel gear (11) is connected with the motor shaft (3) through the inner splines and connected with the inner splines on the transmission shaft (5) through the outer splines; the second three-pivot universal joint (6) is connected with the first bevel gear (11) through the inner splines and connected with the inner splines on the transmission shaft (5) through the outer splines; so that the rotary motion of the motor shaft (3) transmits power to the first bevel gear (11) through the power transmission mechanism.

[0018] As shown in FIG. 11, the front plate (39) is provided with a first brake caliper through slot (27) and a second brake caliper through slot (28), and both the first brake caliper through slot (27) and the second brake caliper through slot (28) are rectangular through slots. Figure 16 、 17 As shown in FIG. 11, the second bevel gear (13) is arranged with a first push shaft (49) and a second push shaft (50), and the first push shaft (49) and the second push shaft (50) are both cylindrical and have the same size.

[0019] As shown in FIG. 11, the front plate (39) is provided with a first brake caliper through slot (27) and a second brake caliper through slot (28), and both the first brake caliper through slot (27) and the second brake caliper through slot (28) are rectangular through slots. Figure 18 、 19 As shown in FIG. 11, the front plate (39) is provided with a first brake caliper through slot (27) and a second brake caliper through slot (28), and both the first brake caliper through slot (27) and the second brake caliper through slot (28) are rectangular through slots.

[0020] As shown in FIG. 11, the front plate (39) is provided with a first brake caliper through slot (27) and a second brake caliper through slot (28), and both the first brake caliper through slot (27) and the second brake caliper through slot (28) are rectangular through slots. Figure 18 、 19 ​​, 22, the first lever push block waist hole (52) is arranged close to the first lever through hole (53), which plays a reinforcing role; the first lever through hole (53) is matched with the first lever shaft (9), and the first lever waist hole (54) is matched with the first push shaft (49) through the needle bearing; after assembly, the central axis of the first push shaft (49) and the rotating shaft (21) is parallel. The second lever (20) is consistent with the first lever (12) in shape and size, and is provided with a second lever push block shaft through hole (73), a second lever through hole (69) and a second lever waist hole (68).

[0021] As shown in Figures 20-22 , the first lever push block (10) is composed of a first push block (56), a second push block (57) and a first lever push shaft (55); wherein the first push block (56) and the second push block (57) are consistent in size and arranged in parallel, and the first lever push shaft (55) is used for fixedly connecting the first push block (56) and the second push block (57); the second lever push block (19) is consistent with the first lever push block (10) in shape and size.

[0022] As shown in Figures 23-27 , the front brake caliper (15) is a left-right symmetrical structure; the side section is an inverted L-shaped.

[0023] The front brake caliper (15) is composed of a second front brake caliper guide rail groove (58), a first front brake caliper guide rail groove (59), a first front brake caliper support column (60), a second front brake caliper support column (61), a front brake caliper front plate (62), a first lever push block connecting groove (63) and a front brake caliper support plate (74); the front brake caliper front plate (62) is a left-right symmetrical structure, and a front brake caliper front plate U-shaped groove (64) is arranged in the middle; the front brake pad (72) is fixedly connected with the front brake caliper front plate (62) through the front brake caliper front plate U-shaped groove (64), and the connection mode can be the same as that of a traditional brake caliper.

[0024] The front brake caliper support plate (74) is fixedly connected with the front brake caliper front plate (62) through the first front brake caliper support column (60) and the second front brake caliper support column (61); the first front brake caliper support column (60) and the second front brake caliper support column (61) are both cuboid structures.

[0025] As shown in Figures 23-27 , the first lever push block connecting groove (63) is a rectangular structure, and the internal size thereof is the same as that of the first lever push block (10), and the two are fixedly connected; the first push block front end surface (G1) is fixedly connected with the first lever push block connecting groove rear end surface (H1), the first lever push block right end surface (G2) is fixedly connected with the first lever push block connecting groove right end surface (H2), and the first lever push block upper end surface (G3) is fixedly connected with the first lever push block connecting groove upper end surface (H3); so as to realize the limiting function of the first lever push block connecting groove (63) on the first lever push block (10).

[0026] As Figures 28-29 It can be known that the rear brake caliper (22) is composed of the rear brake caliper support plate (71), the second rear brake caliper guide rail groove (66), the first rear brake caliper guide rail groove (67) and the second lever push block connecting groove (65).

[0027] The second lever push block connecting groove (65) is consistent in size with the first lever push block connecting groove (63); the connection mode of the second lever push block connecting groove (65) and the second lever push block (19) is consistent with the connection mode of the first lever push block connecting groove (63) and the first lever push block (10).

[0028] As Figure 30 shown, after assembly, the center axes of the second lever shaft (18), the second lever through hole (69), the third lever mounting hole (34) and the fourth lever mounting hole (46) coincide, the second lever shaft (18) is installed between the third lever mounting hole (34) and the fourth lever mounting hole (46) through the second lever through hole (69); the second lever (20) rotates around the second lever shaft (18); the second lever waist-shaped hole (68) cooperates with the second push shaft (50) through a needle bearing; after installation, the center axes of the second push shaft (50) and the rotating shaft (21) are parallel.

[0029] After assembly, the rotating shaft (21), the first lever shaft (9) and the second lever shaft (18) are parallel and in the same plane, the first lever shaft (9) is installed between the first lever mounting hole (33) and the second lever mounting hole (45), the second lever shaft (18) is installed between the third lever mounting hole (34) and the fourth lever mounting hole (46), the first lever shaft (9) and the second lever shaft (18) are both parallel to the rotating shaft (21) and perpendicular to the right end surface (C3) of the first side plate.

[0030] Compared with the traditional brake system scheme: this scheme can realize all functions of traditional braking through the rotary motor and the related transmission system, and can realize active braking, thereby providing a solution for decoupling brake energy recovery of new energy vehicles and brake system of intelligent driving vehicles.

[0031] Compared with the existing electronic mechanical brake actuator: this scheme is a brand new mechanism, which uses a motor arranged on the vehicle body and uses a power transmission mechanism to transmit the rotary torque of the motor, effectively reducing the unsprung mass of the vehicle, improving the working environment of the motor, and improving the ride comfort, handling stability and driving safety of the vehicle; in addition, this scheme uses a rotary motor and a gear push shaft type lever mechanism as a brake actuator, which can meet the needs of multiple vehicle models, especially effectively meeting the problem of large brake force demand of large vehicles. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1Assembly view of the electromechanical brake actuator.

[0033] Figure 2 Right view of the electric motor (1).

[0034] Figure 3 Three-dimensional view of the electric motor (1).

[0035] Figure 4 Three-dimensional view of the actuator housing (14).

[0036] Figure 5 Left view of the actuator housing (14).

[0037] Figure 6 Sectional view of the actuator housing (14).

[0038] Figure 7 Exploded view of the actuator housing (14) Figure 1 .

[0039] Figure 8 Exploded view of the actuator housing (14) Figure 2 .

[0040] Figure 9 Side view of the actuator housing first side plate (40).

[0041] Figure 10 Front view of the actuator housing front plate (39).

[0042] Figure 11 Three-dimensional view of the actuator housing bottom plate (26).

[0043] Figure 12 Three-dimensional view of the end cap (7).

[0044] Figure 13 Top view of the end cap (7).

[0045] Figure 14 Sectional view of the end cap (7) in direction A-A.

[0046] Figure 15 Three-dimensional view of the first three-pivot universal joint (4), the transmission shaft (5) and the second three-pivot universal joint (6) in assembled condition.

[0047] Figure 16 Three-dimensional view of the second bevel gear (13).

[0048] Figure 17 Three-dimensional view of the first bevel gear (11), the second bevel gear (13) in assembled condition.

[0049] Figure 18 Three-dimensional view of the first lever (12).

[0050] Figure 19 is a front view of the first lever (12).

[0051] Figure 20 is a three-dimensional structural view of the first lever push block (10).

[0052] Figure 21 is a top view of the first lever push block (10).

[0053] Figure 22 is a three-dimensional structural view of the assembled first bevel gear (11), second bevel gear (13), first lever push block (10) and first lever (12).

[0054] Figure 23 is a three-dimensional structural view of the front brake caliper (15).

[0055] Figure 24 is a front view of the front brake caliper (15).

[0056] Figure 25 is a top view of the front brake caliper (15).

[0057] Figure 26 is a three-dimensional structural view of the assembled front brake caliper (15) and first lever push block (10).

[0058] Figure 27 is a side view of the assembled front brake caliper (15) and first lever push block (10).

[0059] Figure 28 is a three-dimensional structural view of the rear brake caliper (22).

[0060] Figure 29 is a front view of the rear brake caliper (22).

[0061] Figure 30 is a three-dimensional structural view of the assembled actuator housing (14), first lever shaft (9), second lever shaft (18) and rotation shaft (21).

[0062] Figure 31 is a three-dimensional structural view of the assembled actuator housing (14) and front brake caliper (15).

[0063] Figure 32 is a three-dimensional structural view of the assembled actuator housing (14), front brake caliper (15), rear brake caliper (22) and end cover (7).

[0064] Figure 33 is a sectional view of the assembled actuator housing (14), front brake caliper (15), rear brake caliper (22) and end cover (7).

[0065] Figure 34Three-dimensional structure diagram of the assembled first bevel gear (11), second bevel gear (13), first lever (12), second lever (20), first lever push block (10), second lever push block (19), front brake caliper (15) and rear brake caliper (22).

[0066] In the figure: 1, motor; 2, motor fixing hole; 3, motor shaft; 4, first three-pivot universal joint; 5, transmission shaft; 6, second three-pivot universal joint; 7, end cover; 8, first end cover fixing threaded hole; 9, first lever shaft; 10, first lever push block; 11, first bevel gear; 12, first lever; 13, second bevel gear; 14, actuator housing; 15, front brake caliper; 16, return spring; 17, first support rod; 18, second lever shaft; 19, second lever push block; 20, second lever; 21, rotating shaft; 22, rear brake caliper; 23, rear brake pad; 24, brake disc; 25, second support rod; 26, bottom plate; 27, first brake caliper through slot; 28, second brake caliper through slot; 29, third front brake caliper guide rail; 30, fourth front brake caliper guide rail; 31, first rear brake caliper guide rail; 32, first rotating shaft mounting hole; 33, first lever mounting hole; 34, third lever mounting hole; 35, second end cover fixing threaded hole; 36, first bevel gear mounting hole; 37, first support rod connecting hole; 38, second support rod connecting hole; 39, front plate; 40, first side plate; 41, second side plate; 42, third side plate; 43, first front brake caliper guide rail; 44, second rotating shaft mounting hole; 45, second lever mounting hole; 46, fourth lever mounting hole; 47, second front brake caliper guide rail; 48, second rear brake caliper guide rail; 49, first push shaft; 50, second push shaft; 51, second bevel gear mounting hole; 52, first lever push block waist-shaped hole; 53, first lever through hole; 54, first lever waist-shaped hole; 55, first lever push shaft; 56, first push block; 57, second push block; 58, second front brake caliper guide rail groove; 59, first front brake caliper guide rail groove; 60, first front brake caliper support column; 61, second front brake caliper support column; 62, front brake caliper front plate; 63, first lever push block connecting groove; 64, front brake caliper front plate U-shaped groove; 65, second lever push block connecting groove; 66, second rear brake caliper guide rail groove; 67, first rear brake caliper guide rail groove; 68, second lever waist-shaped hole; 69, second lever through hole; 70, fourth push block; 71, rear brake caliper support plate; 72, front brake pad; 73, second lever push block shaft through hole; 74, front brake caliper support plate; 75, second lever push shaft; 76, third push block.

[0067] Explanation of each end surface in the figure

[0068] Figure 7 , 8, 11, 12: A1, right end face of end cover; A2, upper end face of end cover; A3, front end face of end cover; A4, lower end face of end cover; A5, left end face of end cover; A6, rear end face of end cover; B1, rear end face of front plate; B2, lower end face of front plate; B3, left end face of front plate; B4, front end face of front plate; B5, upper end face of front plate; C1, left end face of first side plate; C2, lower end face of first side plate; C3, right end face of first side plate; D1, left end face of second side plate; D2, lower end face of second side plate; D3, right end face of second side plate;

[0069] E1, front end face of third side plate; E2, left end face of third side plate; E3, lower end face of third side plate; E4, right end face of third side plate; E5, upper end face of third side plate; E6, rear end face of third side plate; F1, left end face of bottom plate; F2, upper end face of bottom plate; F3, right end face of bottom plate; F4, front end face of bottom plate; F5, rear end face of bottom plate;

[0070] Figure 20 , 11, 12: G1, front end face of first lever push block; G2, right end face of first lever push block; G3, upper end face of first lever push block.

[0071] Figure 23 , 24 , 11, 12: H1, rear end face of first lever push block connecting groove; H2, right end face of first lever push block connecting groove; H3, upper end face of first lever push block connecting groove; I1, upper end face of front brake caliper support plate; I2, lower end face of front brake caliper support plate; I3, front end face of front brake caliper support plate; J1, upper end face of first front brake caliper support column; J2, front end face of front brake caliper front plate; J3, lower end face of second front brake caliper support column; J4, upper end face of front brake caliper front plate.

[0072] Figure 28 , 29 , 11, 12: K1, rear end face of rear brake caliper; K2, lower end face of rear brake caliper; K3, upper end face of rear brake caliper.

[0073] Figure 9 , 11, 12: L1, lower end face of third front brake caliper guide rail; L2, upper end face of fourth front brake caliper guide rail. DETAILED DESCRIPTION

[0074] The application provides a distributed electronic mechanical brake actuator based on a gear push shaft type lever. In order to make the technical scheme and effects of the application clearer and more explicit, the application is further described in detail with reference to the drawings and examples. It should be understood that the specific implementation described herein is only used to explain the application and does not limit the application.

[0075] A distributed electronic mechanical brake actuator based on a gear push shaft type lever, characterized by a power transmission mechanism, a gear push shaft type lever mechanism, a mounting base and a motor arranged in a vehicle body.

[0076] As shown in Figure 1 , 15 , the power transmission mechanism comprises a first three-pivot universal joint (4), a transmission shaft (5) and a second three-pivot universal joint (6).

[0077] The gear push-shaft type lever mechanism comprises a first bevel gear (11), a second bevel gear (13), a first push-shaft (49), a second push-shaft (50), a first lever (12) and a second lever (20).

[0078] As shown in Figures 1-3 , the motor (1) is a rotary motor, and the motor shaft (3) is provided with external splines; the motor (1) is provided with four motor fixing holes (2), which serve to fix the motor to the vehicle body, and the number is not limited to four.

[0079] The reset springs (16) are arranged between the third side plate (42) and the front brake caliper (15), and the axis is perpendicular to the front end surface (E1) of the third side plate, the number is not limited to two, and the type is not limited to a spiral spring.

[0080] As shown in Figures 4-14 , the mounting base comprises a first side plate (40), a second side plate (41), a bottom plate (26), a third side plate (42), a front plate (39) and an end cover (7).

[0081] As shown in Figures 4-8 , the first side plate lower end surface (C2) is coplanar with the bottom plate upper end surface (F2), and the first side plate left end surface (C1) is coplanar and fixedly connected with the third side plate right end surface (E4).

[0082] The first side plate left end surface (C1) is provided with a first rotating shaft mounting hole (32), a first lever mounting hole (33) and a third lever mounting hole (34), and the center lines of the first rotating shaft mounting hole (32), the first lever mounting hole (33) and the third lever mounting hole (34) are all perpendicular to the first side plate right end surface (C3).

[0083] The first side plate left end surface (C1) is provided with a third front brake caliper guide rail (29) and a fourth front brake caliper guide rail (30), and the third front brake caliper guide rail (29) and the fourth front brake caliper guide rail (30) are both cuboid structures, and the third front brake caliper guide rail (29) and the fourth front brake caliper guide rail (30) are fixedly connected to the first side plate left end surface (C1).

[0084] As shown in Figures 4-8 , the second side plate left end surface (D1) is coplanar with the bottom plate left end surface (F1), the second side plate lower end surface (D2) is coplanar and fixedly connected with the bottom plate upper end surface (F2), and the second side plate right end surface (D3) is coplanar and fixedly connected with the third side plate right end surface (E4).

[0085] The second side plate right end surface (D3) is provided with a second rotating shaft mounting hole (44), a second lever mounting hole (45) and a fourth lever mounting hole (46), and the center lines of the second rotating shaft mounting hole (44), the second lever mounting hole (45) and the fourth lever mounting hole (46) are all perpendicular to the second side plate right end surface (D3).

[0086] As shown in Figures 4-8 , the third side plate (42) is a cuboid structure, the third side plate front end surface (E1) is coplanar with the bottom plate rear end surface (F5), and the third side plate lower end surface (E3) is coplanar with and fixedly connected to the bottom plate upper end surface (F2).

[0087] As shown in Figures 4-8 , 11, the bottom plate (26) includes a first support rod (17), a first rear brake caliper guide rail (31) and a first front brake caliper guide rail (43), the first rear brake caliper guide rail (31) and the first front brake caliper guide rail (43) are both cuboid structures, and the first rear brake caliper guide rail (31) and the first front brake caliper guide rail (43) are fixedly connected to the bottom plate upper end surface (F2).

[0088] As shown in Figures 4-10 , the front plate rear end surface (B1) is coplanar with the bottom plate front end surface (F4), the front plate lower end surface (B2) is coplanar with and fixedly connected to the bottom plate upper end surface (F2), and the front plate left end surface (B3) is coplanar with the bottom plate left end surface (F1); the front plate (39) is provided with a first brake caliper through slot (27) and a second brake caliper through slot (28), and the first brake caliper through slot (27) and the second brake caliper through slot (28) are both rectangular through slots.

[0089] As shown in Figures 7-14 , the end cover (7) is provided with a first bevel gear mounting hole (36), six first end cover fixing threaded holes (8), a second support rod (25), a second front brake caliper guide rail (47) and a second rear brake caliper guide rail (48); the first end cover fixing threaded holes (8) are used for fixing the end cover (7), and the number is not limited to six, which can be increased or decreased according to the actual installation situation.

[0090] The end cover front end surface (A3) is coplanar with the front plate front end surface (B4), the end cover lower end surface (A4) is coplanar with and fixedly connected to the front plate upper end surface (B5), the end cover left end surface (A5) is coplanar with the second side plate left end surface (D1), the end cover rear end surface (A6) is coplanar with the third side plate rear end surface (E6), and the end cover lower end surface (A4) is coplanar with and fixedly connected to the third side plate upper end surface (E5).

[0091] As shown in Figure 1 , 15As shown, the first three-pivot universal joint (4) and the second three-pivot universal joint (6) are provided with internal splines and external splines. The first bevel gear (11) is connected to the motor shaft (3) through the internal spline and to the internal spline on the transmission shaft (5) through the external spline. The second three-pivot universal joint (6) is connected to the first bevel gear (11) through the internal spline and to the internal spline on the transmission shaft (5) through the external spline. The rotational motion of the motor shaft (3) is transmitted to the first bevel gear (11) through the power transmission mechanism.

[0092] like Figure 16 , 17 As shown, the second bevel gear (13) is provided with a first push shaft (49) and a second push shaft (50). The first push shaft (49) and the second push shaft (50) are cylindrical and have the same size. The central axis of the first push shaft (49) and the second push shaft (50) is parallel to the central axis of the rotating shaft (21).

[0093] like Figure 17 As shown, the central axis of the first bevel gear (11) coincides with the central axis of the first bevel gear mounting hole (36), and the first bevel gear (11) is assembled between the first bevel gear mounting hole (36) and the second bevel gear (13).

[0094] The rotating shaft (21) is provided with an external spline, which is connected to the internal spline on the mounting hole (51) of the second bevel gear, so that the second bevel gear (13) rotates with the rotating shaft (21).

[0095] like Figure 18 , 19 As shown, the first lever (12) is provided with a first lever push block waist-shaped hole (52), a first lever through hole (53) and a first lever waist-shaped hole (54); after assembly, the first lever shaft (9) passes through the first lever through hole (53) and is installed in the first lever mounting hole (33) and the second lever mounting hole (45), and the central axes of the first lever shaft (9), the first lever through hole (53), the first lever mounting hole (33) and the second lever mounting hole (45) coincide; the first lever (12) can rotate around the first lever shaft (9).

[0096] like Figure 18 , 19 As shown in Figure 22, the first lever push block waist-shaped hole (52) is arranged near the first lever through hole (53) to increase force; the first lever through hole (53) is engaged with the first lever shaft (9), and the first lever waist-shaped hole (54) is engaged with the first push shaft (49) through a needle roller bearing; after assembly, the central axes of the first push shaft (49) and the rotating shaft (21) are parallel. The second lever (20) has the same shape and size as the first lever (12), and is provided with a second lever push block shaft through hole (73), a second lever through hole (69), and a second lever waist-shaped hole (68).

[0097] As Figures 20-22 shown, the first lever push block (10) is composed of a first push block (56), a second push block (57) and a first lever push shaft (55); wherein the first push block (56) and the second push block (57) are the same size and arranged in parallel with each other, and the first lever push shaft (55) is used to fixedly connect the two; the first lever push shaft (55) is matched and installed with the first lever push block waist-shaped hole (52); the second lever push block (19) is composed of a third push block (76), a fourth push block (70) and a second lever push shaft (75); the second lever push block (19) is the same size and shape as the first lever push block (10).

[0098] As Figures 23-27 can be seen, the front brake caliper (15) is a left-right symmetrical structure; the side cross section is an inverted L type.

[0099] The front brake caliper (15) is composed of a second front brake caliper guide rail groove (58), a first front brake caliper guide rail groove (59), a first front brake caliper support column (60), a second front brake caliper support column (61), a front brake caliper front plate (62), a first lever push block connecting groove (63) and a front brake caliper support plate (74); the front brake caliper front plate (62) is a left-right symmetrical structure, and a front brake caliper front plate U-shaped groove (64) is arranged in the middle; the front brake pad (72) is fixedly connected with the front brake caliper front plate (62) through the front brake caliper front plate U-shaped groove (64), and the connection mode can be the same as that of a traditional brake caliper.

[0100] The front brake caliper support plate (74) is fixedly connected with the front brake caliper front plate (62) through the first front brake caliper support column (60) and the second front brake caliper support column (61); the first front brake caliper support column (60) and the second front brake caliper support column (61) are both cuboid structures; after installation, the upper end surface (J4) of the front brake caliper front plate is coplanar with the upper end surface (J1) of the first front brake caliper support column, and the upper end surface (J4) of the front brake caliper front plate is parallel to the lower end surface (J3) of the second front brake caliper support column; the front end surface (J2) of the front brake caliper front plate is parallel to the front end surface (I3) of the front brake caliper support plate.

[0101] As Figures 23-27 can be seen, the first lever push block connecting groove (63) is a rectangular structure, and its internal size is the same as that of the first lever push block (10), and the two are fixedly connected; the front end surface (G1) of the first push block is fixedly connected with the rear end surface (H1) of the first lever push block connecting groove, the right end surface (G2) of the first lever push block is fixedly connected with the right end surface (H2) of the first lever push block connecting groove, and the upper end surface (G3) of the first lever push block is fixedly connected with the upper end surface (H3) of the first lever push block connecting groove; so as to realize the limiting function of the first lever push block connecting groove (63) on the first lever push block (10), so that the push block can only move forward and backward.

[0102] As Figures 28-29 It can be seen that the rear brake caliper (22) is composed of a rear brake caliper support plate (71), a second rear brake caliper guide rail groove (66), a first rear brake caliper guide rail groove (67) and a second lever push block connecting groove (65).

[0103] The second lever push block connecting groove (65) is the same size as the first lever push block connecting groove (63); the connection mode of the second lever push block connecting groove (65) and the second lever push block (19) is the same as that of the first lever push block connecting groove (63) and the first lever push block (10).

[0104] As Figure 30 shown, after assembly, the center axes of the second lever shaft (18), the second lever through hole (69), the third lever mounting hole (34) and the fourth lever mounting hole (46) coincide, the second lever shaft (18) passes through the second lever through hole (69) and is installed between the third lever mounting hole (34) and the fourth lever mounting hole (46); the second lever (20) rotates around the second lever shaft (18); the second lever waist hole (68) cooperates with the second push shaft (50) through a needle bearing; after installation, the center axes of the second push shaft (50) and the rotating shaft (21) are parallel.

[0105] As Figure 30 can be seen, after assembly, the rotating shaft (21) is installed on the actuator shell (14) through the first rotating shaft mounting hole (32) and the second rotating shaft mounting hole (44), the rotating shaft center line is parallel to the upper end surface (F2) of the actuator bottom plate, and the rotating shaft center line is perpendicular to the right end surface (C3) of the first side plate.

[0106] After assembly, the axes of the rotating shaft (21), the first lever shaft (9) and the second lever shaft (18) are parallel and in the same plane, the first lever shaft (9) is installed between the first lever mounting hole (33) and the second lever mounting hole (45), the second lever shaft (18) is installed between the third lever mounting hole (34) and the fourth lever mounting hole (46), and the first lever shaft (9) and the second lever shaft (18) are both parallel to the rotating shaft (21) and perpendicular to the right end surface (C3) of the first side plate.

[0107] As Figures 31-33 can be seen, the third front brake caliper guide rail lower end surface (L1) is coplanar with the upper end surface (J1) of the first front brake caliper support column, and the fourth front brake caliper guide rail upper end surface (L2) is parallel to the lower end surface (J3) of the second front brake caliper support column; the upper end surface (I1) of the front brake caliper support plate is parallel to the lower end surface (A4) of the end cover, and the lower end surface (I2) of the front brake caliper support plate is parallel to the upper end surface (F2) of the bottom plate; the first front brake caliper support column (60) and the second front brake caliper support column (61) can translate forward and backward in the first brake caliper through groove (27) and the second brake caliper through groove (28).

[0108] The rear brake caliper upper end face (K3) is parallel to the end cap lower end face (A4), and the rear brake caliper lower end face (K2) is parallel to the bottom plate upper end face (F2); the rear brake caliper (22) moves forward and backward under the restriction of the end cap (7), the actuator housing (14), the first rear brake caliper guide rail (31), and the second rear brake caliper guide rail (48).

[0109] The working principle of the distributed electronic mechanical brake actuator based on the gear push shaft type lever according to the application is as follows: the process of applying the brake and adjusting the brake force is as follows:

[0110] When the driver steps on the brake pedal, the motor (1) is powered on, the motor shaft (3) rotates, the power transmission mechanism transmits power to the first bevel gear (11); the second bevel gear (13) rotates counterclockwise under the drive of the first bevel gear (11), and at the same time, under the limiting action of the first lever push block connecting groove (63), drives the first lever push block (10) to translate backward; under the action of the first lever push block (10), the front brake caliper (15) and the front brake pad (72) translate backward; under the limiting action of the second lever push block connecting groove (65), the second bevel gear (13) drives the second lever push block (19) to translate horizontally forward, and pushes the rear brake caliper (22) and the rear brake pad (23) to move forward; the brake pad clamps the brake disc (24) to apply the brake force to the brake disc (24).

[0111] During the process of applying the brake, the driver can control the size of the motor torque output by the motor (1) through the brake pedal opening, so as to realize the adjustment of the brake force.

[0112] The process of releasing the brake is as follows:

[0113] When the driver reduces the pedal force, the motor (1) is powered on, the motor shaft (3) rotates, the power transmission mechanism transmits power to the first bevel gear (11); the second bevel gear (13) rotates clockwise under the drive of the first bevel gear (11), and at the same time, under the limiting action of the first lever push block connecting groove (63), drives the first lever push block (10) to translate forward; under the action of the first lever push block (10), the front brake caliper (15) and the front brake pad (72) translate forward; under the limiting action of the second lever push block connecting groove (65), the second bevel gear (13) drives the second lever push block (19) to translate horizontally backward, and pushes the rear brake caliper (22) and the rear brake pad (23) to move backward; the brake pad moves away from the brake disc (24), thereby reducing or even releasing the brake force.

[0114] During the driving of the automobile, the relative positions of the actuator housing (14), the first bevel gear (11) and the motor (1) installed on the wheel part are often changed. In order to avoid the motion interference, the transmission shaft (5) is a telescopic transmission shaft, which can automatically adapt to the change of the distance between the actuator housing (14), the first bevel gear (11) and the motor (1).

Claims

1. A distributed electromechanical brake actuator based on a gear push-pull lever, characterized by: The power transmission mechanism, the gear push shaft type lever mechanism, the installation base body and the motor arranged in the automobile body are mainly composed; The motor (1) is a rotating motor, and the motor shaft (3) is provided with an external spline; The power transmission mechanism comprises a first three-pivot type universal joint (4), a transmission shaft (5) and a second three-pivot type universal joint (6); The gear push shaft type lever mechanism comprises a first bevel gear (11), a second bevel gear (13), a first push shaft (49), a second push shaft (50), a first lever (12) and a second lever (20); The first lever (12) is provided with a first lever push block waist hole (52), a first lever through hole (53) and a first lever waist hole (54); The first lever through hole (53) is matched with the first lever shaft (9), the first lever shaft (9) is fixedly installed between the first lever mounting hole (33) and the second lever mounting hole (45), the first lever waist hole (54) is matched with the first push shaft (49) through a bearing, the first lever push block waist hole (52) is matched with the first lever push shaft (55) through a bearing, the first lever push shaft (55) and the first push block (56) and the second push block (57) form the first lever push block (10), the first push block (56) and the second push block (57) are identical in size and are arranged in parallel, and the first lever push shaft (55) is used for fixedly connecting the first push block (56) and the second push block (57); the first lever push block connecting groove (63) has a rectangular structure, the internal size of the first lever push block connecting groove (63) is same as the size of the first lever push block (10), and the first lever push block connecting groove (63) is fixedly connected with the first lever push block (10); The first lever push block waist hole (52) is arranged at a position close to the first lever through hole (53) and plays a reinforcing role; The motor (1) is powered on, the motor shaft (3) rotates, the power transmission mechanism drives the first bevel gear (11) to rotate, the second bevel gear (13) rotates around the axis thereof under the driving of the first bevel gear (11), correspondingly drives the first push shaft (49) and the second push shaft (50) to rotate around the axis of the second bevel gear (13), the first push shaft (49) drives the first lever (12) to rotate around the first lever shaft (9), under the limiting action of the first lever push block connecting groove (63), the first lever push block (10) is driven by the first lever push block waist hole (52) and the first lever push shaft (55) to move forward / backward, correspondingly drives the front brake caliper (15) and the front brake pad (72) to move forward / backward, in this process, in addition to rotating around the first push shaft (49) and the first lever push shaft (55), the first push shaft (49) and the first lever push shaft (55) move forward / backward in the first lever waist hole (54) and the first lever push block waist hole (52) respectively; The structure of the second lever (20) and the connection of the second lever (20) with the rear brake caliper (22) and the second bevel gear (13) are same as those of the first lever (12); and the position after installation coincides with the position of the first lever (12) after rotating 180° around the axis of the second bevel gear (13); The installation base body comprises a first side plate (40), a second side plate (41), a bottom plate (26), a third side plate (42), a front plate (39) and an end cover (7). The end cover (7) is provided with a first bevel gear mounting hole (36), a first end cover fixing threaded hole (8), a second support rod (25), a second front brake caliper guide rail (47), and a second rear brake caliper guide rail (48); The front plate (39) is provided with a first brake caliper through slot (27) and a second brake caliper through slot (28), both of which are rectangular through slots; The first side plate left end face (C1) is provided with a first rotating shaft mounting hole (32), a first lever mounting hole (33), and a third lever mounting hole (34), and the center lines of the first rotating shaft mounting hole (32), the first lever mounting hole (33), and the third lever mounting hole (34) are all perpendicular to the first side plate right end face (C3); The first side plate left end face (C1) is provided with a third front brake caliper guide rail (29) and a fourth front brake caliper guide rail (30), both of which are cuboid structures, and the third front brake caliper guide rail (29) and the fourth front brake caliper guide rail (30) are fixedly connected to the first side plate left end face (C1); The second side plate right end face (D3) is provided with a second rotating shaft mounting hole (44), a second lever mounting hole (45), and a fourth lever mounting hole (46); The third side plate (42) is a cuboid structure, the third side plate front end face (E1) is coplanar with the bottom plate rear end face (F5), and the third side plate lower end face (E3) is coplanar and fixedly connected with the bottom plate upper end face (F2); The bottom plate (26) includes a first support rod (17), a first rear brake caliper guide rail (31), and a first front brake caliper guide rail (43), both of which are cuboid structures, and the first rear brake caliper guide rail (31) and the first front brake caliper guide rail (43) are fixedly connected to the bottom plate upper end face (F2).

2. A distributed electro-mechanical brake actuator based on gear push shaft lever according to claim 1, characterized in that: The first three-pivot universal joint (4) and the second three-pivot universal joint (6) are provided with inner and outer splines, the first bevel gear (11) is connected with the motor shaft (3) through the inner spline and connected with the inner spline on the transmission shaft (5) through the outer spline; the second three-pivot universal joint (6) is connected with the first bevel gear (11) through the inner spline and connected with the inner spline on the transmission shaft (5) through the outer spline; the rotating movement of the motor shaft (3) is transmitted to the first bevel gear (11) through the power transmission mechanism; The rotating shaft (21) is provided with an outer spline and is connected with the inner spline on the second bevel gear (13); The second bevel gear (13) is arranged with a first push shaft (49) and a second push shaft (50), both of which are cylindrical.

3. A distributed electro-mechanical brake actuator based on gear push shaft lever according to claim 1, characterized in that: The rear brake caliper (22) is composed of a rear brake caliper support plate (71), a second rear brake caliper guide rail groove (66), a first rear brake caliper guide rail groove (67), and a second lever push block connecting groove (65); The reset spring (16) is arranged between the third side plate (42) and the front brake caliper (15), the axis is perpendicular to the third side plate front end face (E1), the number is not limited to two, and the type is not limited to a spiral spring.

Images