Belt-driven MGU actuator

Abstract

The utility model relates to the field of parking brake actuators, and discloses a belt-driven MGU actuator which is characterized in that a motor mounting seat is fixedly arranged at the upper end of a first shell, a first clamping seat is arranged on the front side of the motor mounting seat, and a second clamping seat is arranged on the rear side of the motor mounting seat; a first mounting groove is formed in the first clamping seat, a second mounting groove is formed in the second clamping seat, and the cross section of the second mounting groove is T-shaped; a mounting framework is further included, the mounting framework is fixedly inserted into the first mounting groove and the second mounting groove through an integrally-arranged mounting part, one part of the mounting framework extends into the upper side of the first shell, the other part of the mounting framework extends into the upper side of the second shell, and a mounting shaft of the transmission part is fixedly mounted on the mounting framework. The actuator has the advantages of reliable operation, low failure rate and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of parking brake, especially a MGU actuator with transmission. BACKGROUND

[0002] Chinese patent application CN202211122565.8 discloses an electronic parking brake, which is generally designed in a manner that the actuator and the jaw body part are separate, the actuator is driven by a motor to transmit torque through a speed reducer, and the output torque acts on the driving part of the jaw body part to drive the brake block to brake or release the brake.

[0003] Among them, the MGU actuator motor of the existing electronic parking brake transmits torque through a worm gear structure which is relatively complex, and the use of belt transmission has the shortcomings of large axial size of the transmission part, large transmission distance, and poor stability of the belt wheel. UTILITY MODEL CONTENTS

[0004] The utility model provides a MGU actuator with transmission in view of the shortcomings in the prior art.

[0005] In order to solve the above technical problems, the utility model solves them through the following technical schemes:

[0006] A MGU actuator with transmission, comprising a lower shell and an upper shell;

[0007] The lower shell comprises a first shell as a motor shell part and a second shell for installing a transmission part;

[0008] The upper end of the first shell is fixedly provided with a motor mounting seat, the front side of the motor mounting seat is provided with a first clamping seat, and the rear side is provided with a second clamping seat; a first mounting groove is formed in the first clamping seat, and a second mounting groove is formed in the second clamping seat, the cross-sectional shape of the second mounting groove is T-shaped;

[0009] Further, the transmission part comprises a synchronous belt, a first pulley and a second pulley connected with the synchronous belt, the second pulley is connected with the motor output shaft, the first pulley is in transmission connection with the planetary reduction mechanism, the planetary reduction mechanism is a planetary reduction mechanism, and the planetary reduction mechanism and the first pulley are both installed on the mounting shaft.

[0010] Further, the transmission part comprises a synchronous belt, a first pulley and a second pulley connected with the synchronous belt, the second pulley is connected with the motor output shaft, the first pulley is in transmission connection with the planetary reduction mechanism, the planetary reduction mechanism is a planetary reduction mechanism, and the planetary reduction mechanism and the first pulley are both installed on the mounting shaft.

[0011] Further, the planetary deceleration mechanism comprises a third shell on the upper part and a fourth shell on the lower part, the third shell and the fourth shell are engaged with each other to form a shell structure, the inner wall of the second shell is provided with a positioning groove, and the edge of the shell structure formed by the third shell and the fourth shell is provided with a positioning block, and the positioning block is installed in the positioning groove.

[0012] Further, the shell structure formed by the third shell and the fourth shell is circular in cross section, the first pulley is a circular barrel structure with an opening downward, the first pulley is sleeved on the shell structure, the middle part of the top surface of the first pulley is equipped with a transmission part, and the transmission part extends into the shell structure and is engaged with the internal planetary gear assembly for transmission.

[0013] Further, the upper part of the mounting skeleton is provided with an embedding groove, a damping member is installed in the mounting part and the embedding groove, a spline structure is arranged on the mounting part, one end of the damping member is sleeved on the mounting column, and the main body part is installed in the embedding groove, the damping member is a rubber member, the damping member comprises a limiting block arranged protruding, and the limiting block is located on the upper side of the first shell and is pressed on the limiting block when the upper shell is closed.

[0014] Further, the mounting skeleton located above the first pulley is a positioning ring, the first pulley is located on the inner side of the positioning ring, the first clamping seat is located at the outer end of the positioning ring and is at least partially inserted into the first mounting groove, a ring-shaped groove is arranged on the positioning groove and used as part of the embedding groove, a positioning hole is formed in the positioning groove, the damping member is matched with the positioning groove and the positioning hole in shape, the damping member is provided with a limiting block on the front end, the middle part and the upper part of the positioning ring, and the tail end of the damping member is covered outside the first clamping seat.

[0015] Further, the part of the upper shell located above the mounting column is provided with a placing cavity, and the part of the damping member on the outer side of the mounting column is tightly attached to the placing cavity.

[0016] Compared with the prior art, the belt type MGU executor designed in the scheme has the advantages of reliable execution, stable limiting of the entire transmission mechanism, vibration absorption, convenient mounting of the skeleton, and the transmission. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the device.

[0018] Figure 2 It is a schematic diagram of the overall structure of the device.

[0019] Figure 3 It is a schematic diagram of the structure of the upper shell.

[0020] Figure 4 It is a schematic diagram of the structure of the third shell and the fourth shell.

[0021] Figure 5Figure 1 is a structural schematic diagram of the mounting frame, damping member and mounting seat.

[0022] Figure 6 Figure 2 is a schematic diagram of the wiring structure.

[0023] The serial numbers shown in the figure: 1 - upper housing, 2 - lower housing, 3 - first housing, 4 - second housing, 5 - first card seat, 6 - second card seat, 7 - first mounting slot, 8 - second mounting slot, 9 - mounting frame, 10 - mounting shaft, 11 - synchronous belt, 12 - first pulley, 13 - second pulley, 18 - positioning block, 20 - embedding groove, 21 - damping member, 22 - limiting block, 23 - positioning ring, 24 - positioning hole, 25 - mounting part, 26 - wiring terminal, 27 - bonding sheet, 28 - pressing sheet, 29 - contact protrusion. DETAILED DESCRIPTION

[0024] The utility model will be described in further detail below in combination with the drawings and embodiments.

[0025] The utility model will be described in further detail below in combination with the drawings and embodiments.

[0026] Embodiment 1

[0027] A belt drive MGU actuator, comprising a lower housing 2 and an upper housing 1; the upper housing 1 and the lower housing 2 form a cavity inside for mounting a motor and a transmission mechanism;

[0028] The lower housing 2 comprises a first housing 3 as a motor housing part and a second housing 4 for mounting a transmission part; the lower end of the second housing 4 is the output end of the transmission mechanism for transmitting the output torque of the motor to the brake part;

[0029] The upper end of the first shell 3 is fixedly provided with a motor mounting seat 40, the front side of the motor mounting seat 40 is provided with a first clamping seat 5, and the rear side is provided with a second clamping seat 6; a first mounting groove 7 is formed in the first clamping seat 5, and a second mounting groove 8 is formed in the second clamping seat 6; the cross-sectional shape of the second mounting groove 8 is T-shaped.

[0030] Further comprising a mounting skeleton 9, the mounting skeleton 9 is fixedly inserted into the first mounting groove 7 and the second mounting groove 8 through an integrally arranged mounting portion 25, a part of the mounting skeleton 9 extends into the upper side of the first shell 3, and another part extends into the upper side of the second shell 4; a mounting shaft 10 of a transmission part is fixedly mounted on the mounting skeleton 9. The mounting skeleton 9 comprises a plate surface portion on the upper side and a mounting portion 25 on the lower side. The part of the mounting skeleton 9 on the upper side of the first shell 3 is in a circular ring shape, and the part on the upper side of the second shell 4 is in a plate structure; the mounting skeleton 9 is fixedly connected to the first mounting groove 7 and the second mounting groove 8 through the mounting portion 25, and the T-shaped connecting structure cooperates with the end plate structure, so as to ensure the stability of the mounting skeleton 9.

[0031] The transmission part comprises a synchronous belt 11, a first pulley 12 and a second pulley 13 connected with the synchronous belt 11, the second pulley 13 is connected with a motor output shaft, the first pulley 12 is in transmission connection with a planetary reduction mechanism, the planetary reduction mechanism is a planetary reduction mechanism, and the planetary reduction mechanism and the first pulley 12 are both mounted on the mounting shaft 10. A transmission wheel one is mounted in the middle of the first pulley 12, the first pulley 12 drives the transmission wheel one to rotate when rotating, the transmission wheel one is in meshing transmission with a planetary gear for speed reduction, and the planetary gear is not limited in particular.

[0032] In the scheme, the planetary reduction mechanism comprises a third shell on the upper part and a fourth shell on the lower part, the third shell and the fourth shell are mutually clamped to form a shell structure, the inner wall of the second shell 4 is provided with a positioning groove, the edge of the shell structure formed by the third shell and the fourth shell is provided with a positioning block 18, and the positioning block 18 is mounted in the positioning groove. The specific clamping structure of the third shell and the fourth shell is that a clamping groove is arranged on the positioning block 18 of one shell, and a clamping hook is arranged on the positioning block 18 of the other shell, the clamping hook is inserted into the clamping groove, and three positioning blocks 18 are arranged on each of the third shell and the fourth shell.

[0033] The shell structure formed by the third shell and the fourth shell is circular in cross section, the first pulley 12 is in a circular barrel structure with an opening facing downward, the first pulley 12 is sleeved on the shell structure, a transmission component is assembled on the top surface of the first pulley 12, and the transmission component extends into the shell structure and is in meshing transmission with an internal planetary gear assembly. The circular barrel structure has the advantages of compact structure, small space occupation, and convenient shape matching with the first pulley 12. Obviously, a gear ring structure is arranged in the third shell and the fourth shell for meshing transmission with the planetary gear.

[0034] In order to ensure the stability of the installation skeleton 9, the installation shaft 10 of the installation skeleton 9 is ensured to be stable, so that the first pulley 12 and the planetary reduction mechanism installed on the installation shaft 10 are stable during operation, and the phenomenon of eccentric wear is avoided.

[0035] The upper part of the installation skeleton 9 is provided with an embedding groove 20 and an installation part 25, and a damping member 21 is installed in the embedding groove 20, the installation part 25 is provided with a spline structure, one end of the damping member 21 is sleeved on the installation column, the main body part is installed in the embedding groove 20, the damping member 21 is a rubber member, the damping member 21 includes a limiting block 22 protrudingly arranged, the limiting block 22 is located on the upper side of the first shell 3, and the upper shell 1 is pressed on the limiting block 22 when the upper shell 1 is closed. The damping member 21 is made of rubber material, and a plurality of limiting blocks 22 are arranged thereon for limiting the axial vibration of the installation skeleton 9.

[0036] Specifically, the installation skeleton 9 located above the first pulley 12 is a positioning ring 23, the first pulley 12 is located inside the positioning ring 23, the first clamping seat 5 is at least partially inserted into the first installation groove 7 at the outer end of the positioning ring 23, a ring-shaped groove is arranged on the positioning groove as part of the embedding groove 20, a positioning hole 24 is formed in the positioning groove, the damping member 21 is matched with the shape of the positioning groove and the positioning hole 24, the damping member 21 is provided with the limiting block 22 at the front end, the middle part and above the positioning ring 23 of the skeleton, and the tail end of the damping member 21 is covered outside the first clamping seat 5.

[0037] The part of the upper shell 1 located above the installation column is provided with a placing cavity, and the part of the damping member 21 outside the installation column is tightly attached to the placing cavity.

[0038] Compared with the prior art, the belt type MGU executor designed in the scheme has the advantages of reliable execution, stable limiting of the entire transmission mechanism, vibration absorption, convenient skeleton installation, and the transmission mechanism.

[0039] Embodiment 2

[0040] The difference between the embodiment and the embodiment 1 is that the motor includes a coil terminal 26, and further includes a terminal assembly, the terminal assembly includes a plug and a wire connected to the plug, the number of the plug is two, one plug is inserted into the terminal 26 of the motor coil, and the other plug is inserted into the terminal 26 of the plug. The terminal 26 of the plug and the terminal 26 of the motor coil are both in a sheet structure, the plug includes a bonding sheet 27 and a pressing sheet 28 bent from the edge of the bonding sheet 27, the bonding sheet 27 is provided with a contact protrusion 29, the contact protrusion 29 and the edge of the pressing sheet 28 form a groove structure for inserting the terminal 26, and the two are welded and fixed or adhesively fixed after assembly.

[0041] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A belt driven MGU actuator characterized by: The lower shell (2) and the upper shell (1) are included. The lower shell (2) includes a first shell (3) as a motor shell part and a second shell (4) for mounting a transmission part. The upper end of the first shell (3) is fixedly provided with a motor mounting seat (40), the front side of the motor mounting seat (40) is provided with a first clamping seat (5), and the rear side is provided with a second clamping seat (6); a first mounting groove (7) is formed in the first clamping seat (5), and a second mounting groove (8) is formed in the second clamping seat (6), and the cross-sectional shape of the second mounting groove (8) is T-shaped. The mounting skeleton (9) is fixedly inserted into the first mounting groove (7) and the second mounting groove (8) through an integrally arranged mounting portion (25), a part of the mounting skeleton (9) extends into the upper side of the first shell (3), and a part of the mounting skeleton (9) extends into the upper side of the second shell (4), and the mounting shaft (10) of the transmission part is fixedly mounted on the mounting skeleton (9).

2. A belt-driven MGU actuator according to claim 1, characterized in that: The transmission part includes a synchronous belt (11), a first pulley (12) and a second pulley (13) connected with the synchronous belt (11), the second pulley (13) is connected with the motor output shaft, the first pulley (12) is in transmission connection with a planetary reduction mechanism, the planetary reduction mechanism is a planetary reduction mechanism, and the planetary reduction mechanism and the first pulley (12) are both mounted on the mounting shaft (10).

3. A belt-driven MGU actuator according to claim 2, characterized in that: The planetary reduction mechanism includes a third shell at the upper part and a fourth shell at the lower part, the third shell and the fourth shell are clamped with each other to form a shell structure, the inner wall of the second shell (4) is provided with a positioning groove, and the edge part of the shell structure formed by the third shell and the fourth shell is provided with a positioning block (18) mounted in the positioning groove.

4. A belt-driven MGU actuator according to claim 3, wherein: The shell structure formed by the third shell and the fourth shell has a circular cross section, the first pulley (12) has a circular barrel structure with an opening downward, the first pulley (12) is sleeved on the shell structure, a transmission component is arranged on the top surface of the first pulley (12), and the transmission component extends into the shell structure and is in meshing transmission with an internal planetary gear assembly.

5. A belt-driven MGU actuator according to claim 3, characterized in that: The upper part of the mounting skeleton (9) is provided with an embedding groove (20), a damping member (21) is mounted in the mounting portion (25) and the embedding groove (20), a spline structure is arranged on the mounting portion (25), one end of the damping member (21) is sleeved on a mounting column, the main body part is mounted in the embedding groove (20), the damping member (21) is a rubber member, the damping member (21) includes a limiting block (22) protrusively arranged, the limiting block (22) is located on the upper side of the first shell (3), and the limiting block (22) is pressed when the upper shell (1) is covered.

6. A belt-driven MGU actuator according to claim 5, wherein: The positioning ring (23) is located above the first pulley (12), the first pulley (12) is located inside the positioning ring (23), the first clamping seat (5) is at least partially inserted into the first mounting groove (7) at the outer end of the positioning ring (23), the positioning groove is provided with an annular groove as part of the embedding groove (20), the positioning groove is provided with a positioning hole (24), the damping member (21) is matched with the shape of the positioning groove and the positioning hole (24), the damping member (21) is provided with a limiting block (22) at the front end, the middle part and above the positioning ring (23), and the tail end of the damping member (21) is wrapped outside the first clamping seat (5).

7. A belt-driven MGU actuator according to claim 5, characterized in that: The part of the upper shell (1) above the mounting column is provided with a placing cavity, and the part of the damping member (21) outside the mounting column is tightly attached to the placing cavity.

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