Gear type MGU actuator for parking braking

Abstract

The utility model relates to the field of parking brakes, and discloses a gear type MGU actuator used for parking braking, a top plate is provided with leading-out ports at two sides of a retainer ring, the gear type MGU actuator also comprises a motor, the motor comprises a motor shell and a motor cover at the end part, the motor cover is provided with a wire holder, the wire holder comprises a base, the middle part of the base is provided with a mounting hole, and the mounting hole is communicated with the motor shell. A welding piece in the middle and lug plates on the two sides of the welding piece are arranged in the mounting hole, a lead hole is formed between the lug plates and the welding piece, and a terminal of a motor coil can be led out from the lead hole to be welded and fixed with the welding piece and the lug plates; one side of the left cavity extends to form a wiring port, the wiring port faces downwards, a wiring pin is arranged in the wiring port, the wiring pin extends to the lead-out port, and the wiring pin and the welding piece are welded and fixed. The actuator has the advantages of reliable structure, low noise, stable connection, long service life and the like.

Description

Technical Field

[0001] The utility model relates to the field of parking brakes, in particular to a gear-type actuator used for parking brakes. Background Art

[0002] Chinese patent application CN202211122565.8 discloses an electronic parking brake. The existing MGU actuator motor in this system uses a complex structure to transmit torque via a worm gear. Welding the motor lead terminals and wiring terminals is inconvenient and unreliable. Furthermore, the wiring area is not separated from the drive area, which reduces the life of the wiring terminals. Utility Model Content

[0003] The utility model aims at the shortcomings of the prior art and provides a gear-type actuator for parking brake.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] A gear-type actuator for parking brakes, comprising a housing and an upper cover. The housing is an integrated structure and includes a left cavity for mounting a motor and a right cavity for mounting a transmission mechanism.

[0006] The upper end of the left cavity is a top plate, and a mounting opening is opened on the top plate in the middle of the upper end of the left cavity. A vertical edge is provided on the edge of the top plate, and a retaining ring is provided along the upper edge of the mounting opening. The height of the retaining ring is lower than the height of the edge. The edge and the retaining ring form a first reduction gear cavity.

[0007] The top plate is provided with outlets on both sides of the retaining ring, and also includes a motor, the motor includes a motor shell and a motor cover at the end, the motor cover is provided with a terminal block, the terminal block includes a base, a mounting hole is provided in the middle of the base, a welding piece in the middle and terminal pieces on both sides of the welding piece are provided in the mounting hole, a lead hole is provided between the terminal piece and the welding piece, and the terminal of the motor coil can be led out from the lead hole and welded to the welding piece and the terminal piece;

[0008] A wiring port extends from one side of the left cavity, the wiring port faces downward, a wiring pin is provided in the wiring port, the wiring pin extends to the lead-out port, and the wiring pin is fixed to the welding piece by welding;

[0009] The upper cover includes a limiting edge, which is plugged into the inner side or the outer side of the retaining ring. The space where the connection pins and the welding sheet are located is isolated from the first reduction gear cavity and the right cavity.

[0010] Preferably, the motor drive shaft is connected to the drive gear and also includes shaft one and a center shaft. Shaft one is located in the first reduction gear cavity. The upper end of shaft one is connected to the upper cover, and the lower end of shaft one is connected to the shell. Shaft one is equipped with a first reduction gear. The first reduction gear includes a large gear on the upper part that meshes with the drive gear and a small gear on the lower side. The large gear and the small gear are an integrated structure and are coaxially arranged. A second reduction mechanism is provided in the right cavity, and the second reduction mechanism is installed in the right cavity and on the center shaft.

[0011] Preferably, a ring gear structure is provided in the right cavity, and a support step is provided on the lower end face of the ring gear structure. It also includes a drive plate, on which planetary gears are mounted. The planetary gears are engaged with the sun gear mounted on the central axis in the middle, and the edge is engaged with the ring gear structure. The sun gear includes a gear 1 with a large outer diameter and a gear 2 with a small outer diameter. Gear 1 and gear 2 are fixedly connected and coaxially arranged, and gear 1 is engaged with the pinion.

[0012] Preferably, a groove is provided in the middle of the large gear, the middle of the groove is a support ring, support spokes are provided between the support ring and the annular inner side of the groove, the number of support spokes is 6 and they are evenly arranged in the circumferential direction, and arc-shaped support bars are provided between adjacent support spokes, the number of arc-shaped support bars is 3 and they are distributed alternately.

[0013] Preferably, the driving plate is located in the limiting step, an output head is installed in the middle of the driving plate, and the output head is provided with a spline structure.

[0014] Preferably, the right cavity is a double-layer structure, including an inner sleeve and an outer sleeve, the inner sleeve and the outer sleeve are coaxially arranged, a supporting vertical bar is provided between the inner sleeve and the outer sleeve, and the lower end face of the inner sleeve is located on the inner side of the lower end face of the outer sleeve.

[0015] Preferably, a mounting ear is extended from the outside of the outer sleeve, and a reinforcing structure is provided on the inside of the mounting ear. The reinforcing structure is in the shape of a "human", and the reinforcing structure is supported on the outer wall of the left cavity, the outer wall of the right cavity and the inner wall of the mounting ear. An arc-shaped reinforcing rib is also provided between the outer wall of the left cavity and the outer wall of the right cavity.

[0016] This solution offers the following advantages over existing technologies: The actuator is reliable, offers convenient and secure terminal connections, is unaffected by transmission mechanism oil, and has a longer service life. Furthermore, the transmission mechanism and housing design are more robust, and the mounting ears have greater depth, resulting in a stronger and more reliable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of the device.

[0018] Figure 2 for Figure 1 Bottom view of .

[0019] Figure 3 for Figure 2 sectional view of .

[0020] Figure 4 for Figure 3 A partial enlarged view of .

[0021] Figure 5 yes Figure 1 Schematic diagram of the structure with the top cover removed.

[0022] The numbers shown in the figure are: 1-housing, 2-upper cover, 3-left cavity, 4-right cavity, 5-motor, 6-top plate, 7-mounting port, 8-edge, 9-retaining ring, 10-first reduction gear cavity, 11-motor cover, 12-terminal block, 13-base, 14-welding piece, 15-terminal piece, 16-lead hole, 17-terminal port, 18-terminal pin, 19-driving gear, 20-large gear, 21-small gear, 22-axis 1, 23-gear ring structure, 24-driving plate, 25-planetary gear, 26-sun gear, 27-gear 1, 28-gear 2, 29-support spokes, 30-arc-shaped support bar, 31-inner sleeve, 32-outer sleeve, 33-support vertical bar, 34-mounting ear, 35-reinforcement structure, 36-reinforcement rib, 161-lead outlet, 38-center axis. DETAILED DESCRIPTION

[0023] The present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0024] The present invention will be described in detail below with reference to the accompanying drawings, and the technical solutions in the embodiments of the present invention will be described clearly and completely.

[0025] Example 1

[0026] The gear-type actuator for parking brakes comprises a housing 1 and a cover 2. The housing 1 is a one-piece structure, comprising a left chamber 3 for mounting a motor 5 and a right chamber 4 for mounting a transmission mechanism. The housing 1 is integrally formed by mold casting. Both the left chamber 3 and the right chamber 4 are cylindrical.

[0027] The upper end of the left cavity 3 is a top plate 6, which is used to provide a limit for the installation of the motor. This ensures the reliability of the installation of the motor 5. A mounting opening 7 is provided on the top plate 6 in the middle of the upper end of the left cavity 3. The edge of the top plate 6 is provided with a vertical edge 8, wherein the edge 8 is an arc-shaped edge. A retaining ring 9 is provided along the upper edge of the mounting opening 7. The height of the retaining ring 9 is lower than that of the edge 8. The retaining ring 9 is used to provide space for the installation of the first reduction gear. The edge 8 and the retaining ring 9 enclose a first reduction gear cavity 10.

[0028] The top plate 6 is provided with a lead-out port 161 on both sides of the retaining ring 9, and also includes a motor 5. The motor 5 includes a motor 5 shell and a motor cover 11 at the end. The motor cover 11 is provided with a terminal block 12. The terminal block 12 includes a base 13. A mounting hole is provided in the middle of the base 13. A welding piece 14 in the middle and terminal pieces 15 on both sides of the welding piece 14 are provided in the mounting hole. A lead-out hole 16 is provided between the terminal piece 15 and the welding piece 14. The terminal of the motor 5 coil can be led out from the lead-out hole 16 and welded to the welding piece 14 and the terminal piece 15; this connection method is very convenient. Since the motor 5 and the terminal block 13 are pre-installed, in the later installation process, it is only necessary to install the motor 5 to the left cavity 3, and the welding piece 14 of the terminal block 12 is led out from the lead-out port 161 and welded to the terminal pin 18.

[0029] A wiring port 17 extends from one side of the left cavity 3, facing downward. A wiring pin 18 is provided in the wiring port 17, extending to the lead-out port 161. The wiring pin 18 is fixed to the welding piece 14 by welding.

[0030] The upper cover 2 includes a retaining edge that is inserted into the inner or outer side of the retaining ring 9. The space where the connection pins 18 and the welding piece 14 are located is isolated from the first reduction gear cavity 10 and the right cavity 4. This structural design can ensure that the connection area is separated from the transmission area, thereby ensuring the reliability of the connection position and extending its service life.

[0031] The driving shaft of the motor 5 is connected to the driving gear 19, and also includes a shaft 22 and a center shaft 38. The shaft 22 is located in the first reduction gear cavity 10, the upper end of the shaft 22 is connected to the upper cover 2, and the lower end of the shaft 22 is connected to the shell 1. The first reduction gear is assembled on the shaft 22, and the first reduction gear includes a large gear 20 on the upper part that meshes with the driving gear 19 and a small gear 21 on the lower side. The large gear 20 and the small gear 21 are an integrated structure and are coaxially arranged; a second reduction mechanism is provided in the right cavity 4, and the second reduction mechanism is installed in the right cavity 4 and on the center shaft 38. The right chamber 4 houses a ring gear structure 23, with a support step provided on its lower end. It also includes a drive plate 24, on which planetary gears 25 are mounted. These gears mesh with a sun gear 26 mounted on a central shaft 38 at its center, and with the ring gear structure 23 at its edges. Sun gear 26 comprises a large-diameter gear 1 27 and a small-diameter gear 2 28 . Gears 1 27 and 28 are fixedly connected and coaxially arranged. Gear 1 27 meshes with pinion 21. This transmission structure achieves a two-stage reduction, providing reliable output torque. Furthermore, the gear transmission is reliable, stable, and long-lasting.

[0032] The large gear 20 has a groove in the middle, with a support ring in the middle. Six support spokes 29 are positioned between the ring and the inner annular surface of the groove. Three arcuate support bars 30 are positioned between adjacent spokes 29, alternating between them. The drive plate 24 is located within the limiting step, and a splined output connector is mounted in the middle of the drive plate 24.

[0033] In order to ensure the quietness of the transmission and increase the strength of the shell, the right cavity 4 is a double-layer structure, including an inner sleeve 31 and an outer sleeve 32. The inner sleeve 31 and the outer sleeve 32 are coaxially arranged, and a supporting vertical bar 33 is arranged between the inner sleeve 31 and the outer sleeve 32. The lower end face of the inner sleeve 31 is located on the inner side of the lower end face of the outer sleeve 32.

[0034] Extending from the exterior of the outer sleeve 32 are mounting ears 34 for secure connection to the caliper body. Inside these ears are reinforced structures 35 in the shape of a "human" (H). These structures support the outer walls of the left and right cavities 3 and 4, as well as the inner walls of the mounting ears 34. Arc-shaped reinforcing ribs 36 are also provided between the outer walls of the left and right cavities 3 and 4. The "human"-shaped structure has three supporting edges, ensuring that each edge will not deform under load.

Claims

1. A gear-type MGU actuator for parking brake, characterized by: The invention comprises a housing (1) and an upper cover (2), wherein the housing (1) is an integrated structure, and the housing (1) comprises a left cavity (3) for installing a motor (5) and a right cavity (4) for installing a transmission mechanism; The upper end of the left cavity (3) is a top plate (6), a mounting opening (7) is provided on the top plate (6) in the middle of the upper end of the left cavity (3), a vertical surrounding edge (8) is provided on the edge of the top plate (6), a retaining ring (9) is provided along the upper edge of the mounting opening (7), and the height of the retaining ring (9) is lower than the height of the surrounding edge (8); the surrounding edge (8) and the retaining ring (9) enclose a first reduction gear cavity (10); The top plate (6) is provided with outlets (161) on both sides of the retaining ring (9), and further comprises a motor (5), wherein the motor (5) comprises a motor (5) shell and a motor cover (11) at the end thereof, wherein a terminal block (12) is provided on the motor cover (11), wherein the terminal block (12) comprises a base (13), wherein a mounting hole is provided in the middle of the base (13), wherein a welding piece (14) in the middle and terminal blocks (15) on both sides of the welding piece (14) are provided in the mounting hole, wherein a lead hole (16) is provided between the terminal block (15) and the welding piece (14), and wherein the terminal of the motor (5) coil can be led out from the lead hole (16) and fixed by welding to the welding piece (14) and the terminal block (15); A wiring port (17) extends from one side of the left cavity (3), the wiring port (17) faces downward, a wiring pin (18) is provided in the wiring port (17), the wiring pin (18) extends to the lead-out port (161), and the wiring pin (18) and the welding piece (14) are welded and fixed; The upper cover (2) includes a limiting edge, which is plugged into the inner side or the outer side of the retaining ring (9). The space where the connection pins (18) and the welding plate (14) are located is isolated from the first reduction gear cavity (10) and the right cavity (4).

2. The gear-type MGU actuator for parking brake according to claim 1, characterized in that: The motor (5) driving shaft is connected to the driving gear (19) and also includes a shaft (22) and a central shaft (38). The shaft (22) is located in the first reduction gear cavity (10). The upper end of the shaft (22) is connected to the upper cover (2), and the lower end of the shaft (22) is connected to the housing (1). The shaft (22) is equipped with a first reduction gear. The first reduction gear includes a large gear (20) meshing with the driving gear (19) at the upper part and a small gear (21) at the lower side. The large gear (20) and the small gear (21) are an integrated structure and are coaxially arranged. A second reduction mechanism is arranged in the right cavity (4). The second reduction mechanism is installed in the right cavity (4) and on the central shaft (38).

3. The gear-type MGU actuator for parking brake according to claim 2, characterized in that: A ring gear structure (23) is provided in the right cavity (4), and a support step is provided on the lower end surface of the ring gear structure (23). The ring gear structure (23) also includes a driving plate (24). A planetary gear (25) is installed on the driving plate (24). The planetary gear (25) is meshed with a sun gear (26) installed on the central shaft (38) at the middle portion, and is meshed with the ring gear structure (23) at the edge portion. The sun gear (26) includes a gear 1 (27) with a large outer diameter and a gear 2 (28) with a small outer diameter. The gear 1 (27) and the gear 2 (28) are fixedly connected and coaxially arranged. The gear 1 (27) is meshed with the pinion (21).

4. The gear-type MGU actuator for parking brake according to claim 2, characterized in that: A groove is provided in the middle of the large gear (20), the middle of the groove is a support ring, support spokes (29) are provided between the support ring and the annular inner side surface of the groove, the number of the support spokes (29) is 6 and they are evenly arranged in the circumferential direction, and arc-shaped support bars (30) are provided between adjacent support spokes (29), the number of the arc-shaped support bars (30) is 3 and they are distributed alternately.

5. The gear-type MGU actuator for parking brake according to claim 3, characterized in that: The driving plate (24) is located in the limiting step, and an output head is installed in the middle of the driving plate (24), and the output head is provided with a spline structure.

6. The gear-type MGU actuator for parking brake according to claim 1, characterized in that: The right cavity (4) is a double-layer structure, comprising an inner sleeve (31) and an outer sleeve (32). The inner sleeve (31) and the outer sleeve (32) are coaxially arranged. A supporting vertical bar (33) is arranged between the inner sleeve (31) and the outer sleeve (32). The lower end surface of the inner sleeve (31) is located on the inner side of the lower end surface of the outer sleeve (32).

7. The gear-type MGU actuator for parking brake according to claim 6, characterized in that: A mounting ear (34) extends from the outside of the outer sleeve (32), and a reinforcing structure (35) is provided on the inner side of the mounting ear (34). The reinforcing structure (35) is in the shape of a "human" and is supported on the outer wall of the left cavity (3), the outer wall of the right cavity (4), and the inner wall of the mounting ear (34). An arc-shaped reinforcing rib (36) is also provided between the outer wall of the left cavity (3) and the outer wall of the right cavity (4).

Images