Compact large-torque actuator

Abstract

The utility model discloses a compact type large torsion actuator, which relates to the field of automobile actuators, and comprises a shell, an upper cover, a motor with a gear, a transmission assembly, a bracket with a shaft and a circuit board, the shell is matched with the upper cover, and the motor with the gear, the bracket with the shaft and the circuit board are all arranged in the shell. The transmission assembly is installed on the shell through a support with a shaft, the two ends of the motor with the gear are installed on the shell and the upper cover respectively, and the motor with the gear is electrically connected with the circuit board. The support with the shaft is arranged between the upper cover and the shell, the transmission assembly is stacked up and down through the support with the shaft, the height of the transmission assembly is limited within the height range of the motor with the gear, and the horizontal length and width are further compressed under the condition that the height of the whole actuator is not increased. The overall height of the motor with the gear is fully utilized, and transmission compactness is achieved. Moreover, the transmission gear set is used for speed reduction, and finally the output gear is used for outputting rotating force, so that the execution torsion is large.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive actuators, and in particular to a compact high-torque actuator. Background Technology

[0002] The actuators for opening car fuel tank caps or electric vehicle charging caps are usually rotary actuators that push the fuel tank cap out by rotation or output torque to open the charging cap to a specific angle.

[0003] Currently available actuators have low operating torque, such as... Figure 1 and Figure 2 This is the currently common design scheme, in which, Figure 1 This is a common type of fuel tank cap lock actuator, which provides top force but has low output torque. Figure 2 For an existing trolley charging cover actuator, the volume is Figure 1 More than twice the size of its predecessor, it is enormous.

[0004] In view of this, this utility model is developed by deeply conceiving and actively researching, improving and testing the design of existing actuators to address the many shortcomings and inconveniences caused by the imperfections in the existing actuator structure design. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a compact high-torque actuator that improves performance and reduces size.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A compact high-torque actuator includes a housing, a top cover, a geared motor, a transmission assembly, a shaft bracket, and a circuit board. The housing and the top cover are mutually fitted. The geared motor, the shaft bracket, and the circuit board are all installed inside the housing. The transmission assembly is installed on the housing via the shaft bracket. The two ends of the geared motor are respectively installed on the housing and the top cover. The geared motor is electrically connected to the circuit board.

[0008] The shaft bracket includes multiple gear shafts, the shaft bracket is installed on the housing and the gear shafts are connected to the upper cover;

[0009] The transmission assembly is disposed between the housing and the top cover and is mounted on the housing via a shaft bracket. The transmission assembly includes an output gear and a transmission gear set for deceleration. The geared motor, the transmission gear set, and the output gear are rotatably connected in sequence.

[0010] Furthermore, the transmission gear set includes a first double gear, a second double gear, and a third double gear. The first and second double gears are both mounted on a gear shaft. One end of the third double gear is movably connected to the upper cover, and the other end is movably connected to the housing. One end of the output gear is mounted on the gear shaft, and the other end is movably connected to the housing.

[0011] Furthermore, both the large and small gears of the first double gear are helical gears.

[0012] Furthermore, the end of the output gear is exposed outside the housing, and the exposed end of the output gear has an irregular structure for connecting to the output shaft.

[0013] Furthermore, an external sealing ring is provided at the connection between the output gear and the housing.

[0014] Furthermore, the shaft bracket includes a downwardly extending insert plate, which is fixed to the housing.

[0015] Furthermore, the shaft bracket includes an ear plate extending above the circuit board, and a gear shaft is disposed on the ear plate.

[0016] Furthermore, the geared motor includes a motor stator and a motor rotor. The motor stator is fixed to the housing, and a motor gear is provided at the end of the motor rotor away from the motor stator. The motor gear passes through the circuit board and meshes with the transmission gear set.

[0017] Furthermore, the motor stator is provided with multiple pins, which are connected to the circuit board.

[0018] Furthermore, it also includes a rotor shaft, through which the motor rotor is rotatably mounted to the upper cover and housing.

[0019] By adopting the above structure, this invention provides a shaft-supported bracket between the upper cover and the housing. The transmission components are stacked layer by layer using this bracket, limiting the height of the transmission components to within the height range of the geared motor. Without increasing the overall height of the actuator, the horizontal length and width are further compressed, fully utilizing the overall height of the geared motor to achieve a compact transmission. Furthermore, the actuator of this invention uses a transmission gear set for speed reduction and finally outputs rotational force through an output gear, resulting in high torque. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of prior art 1.

[0021] Figure 2 This is a schematic diagram of prior art 2.

[0022] Figure 3This is an exploded view of the preferred embodiment of the present invention.

[0023] Figure 4 This is a rear view of a preferred embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of the preferred embodiment of the present invention, excluding the top cover.

[0025] Figure 6 This is a cross-sectional view of the preferred embodiment of the present invention, excluding the top cover and the shell.

[0026] Explanation of reference numerals in the attached drawings: 11. Housing; 12. Top cover; 2. Geared motor; 21. Motor stator; 22. Motor rotor; 23. Motor gear; 24. Pin; 31. First double gear; 32. Second double gear; 33. Third double gear; 34. Output gear; 4. Shaft bracket; 41. Insert plate; 42. Ear plate; 5. Circuit board; 6. External sealing ring; 7. Gear shaft; 8. Rotor shaft. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] like Figures 3 to 6 The diagram shows a preferred embodiment of a compact high-torque actuator of this utility model, comprising a housing 11, a top cover 12, a geared motor 2, a transmission assembly, a shaft bracket 4, and a circuit board 5. The housing 11 and the top cover 12 are mutually fitted. The geared motor 2, the shaft bracket 4, and the circuit board 5 are all installed inside the housing 11. The transmission assembly is installed on the housing 11 via the shaft bracket 4. The two ends of the geared motor 2 are respectively installed on the housing 11 and the top cover 12. The geared motor 2 is electrically connected to the circuit board 5. Specifically, the housing 11 and the top cover 12 can be installed together by means of snap-fit, screw locking, hinge connection, etc., which are not limited here. A receiving cavity is formed between the housing 11 and the top cover 12, and all parts other than the housing 11 and the top cover 12 can be installed in the receiving cavity.

[0030] The shaft bracket 4 includes multiple gear shafts 7, which are mounted on the housing 11 and connected to the upper cover 12. A transmission assembly is disposed between the housing 11 and the upper cover 12 and mounted on the housing 11 via the shaft bracket 4. The transmission assembly includes an output gear 34 and a transmission gear set for speed reduction. The geared motor 2, the transmission gear set, and the output gear 34 are sequentially rotatably connected. The end of the output gear 34 is exposed outside the housing 11, and an external sealing ring 6 is provided at the connection between the output gear 34 and the housing 11. The exposed end of the output gear 34 has an irregular shape and can be connected to an output shaft.

[0031] Specifically, gear shafts 7 are provided on both the upper and lower ends of the shaft bracket 4. At least one gear in the transmission gear set and the output gear 34 are respectively mounted on the corresponding gear shafts 7. The transmission gear set and the output gear 34 are stacked in layers through the shaft bracket 4. Since the two ends of the geared motor 2 are respectively mounted on the upper cover 12 and the housing 11, the height of the geared motor 2 is the distance between the upper cover 12 and the housing 11. The overall height of the stacked transmission components is less than or equal to the height of the geared motor 2.

[0032] During operation, the actuator outputs torque through the geared motor 2, the transmission gear set, and the output gear 34. The output torque is increased by decelerating through the transmission gear set.

[0033] The key feature of this invention is the installation of a shaft-supported bracket 4 between the upper cover 12 and the housing 11. This bracket allows for the stacking of transmission components, limiting their height to within the range of the geared motor 2. Without increasing the overall height of the actuator, this further compresses the horizontal length and width, fully utilizing the overall height of the geared motor 2 to achieve a compact transmission. Furthermore, the actuator of this invention uses a transmission gear set for speed reduction and finally outputs rotational force through the output gear 34, resulting in high torque.

[0034] In this embodiment, the transmission gear set includes a first double gear 31, a second double gear 32, and a third double gear 33. The first and second double gears 31 and 32 are both mounted on the gear shaft 7. One end of the third double gear 33 is movably connected to the upper cover 12, and the other end is movably connected to the housing 11. One end of the output gear 34 is mounted on the gear shaft 7, and the other end is movably connected to the housing 11. Specifically, the geared motor 2 meshes with the large gear of the first double gear 31, the small gear of the first double gear 31 meshes with the large gear of the second double gear 32, the small gear of the second double gear 32 meshes with the large gear of the third double gear 33, and the small gear of the third double gear 33 meshes with the output gear 34.

[0035] In this embodiment, the first double gear 31 and the second double gear 32 are both arranged above the shaft support 4, and the shaft support 4 forms a height difference between the first double gear 31 and the second double gear 32. The third double gear 33 is arranged on the side of the shaft support 4, and the output gear 34 is arranged below the shaft support 4, so as to realize the stacking of the transmission components in upper and lower layers.

[0036] In this embodiment, a four-stage transmission is preferred, in which the first double gear 31, the second double gear 32, the third double gear 33 and the output gear 34 are staggered to ensure that the output gear 34 is at the outermost edge and the output torque is greater than 1 Nm, while avoiding the increase in material costs caused by more than four stages of transmission.

[0037] In this embodiment, the shaft bracket 4 includes a downwardly extending insert plate 41, which is fixed to the housing 11. The insert plate 41 is a strip plate that extends longitudinally and has teeth on its edges, and is fixed to the housing 11 by insertion.

[0038] In some embodiments, the bracket 4 with shaft can also be installed on the housing 11 by setting a horizontally extending buckle plate and using screws for fastening.

[0039] In this embodiment, the shaft bracket 4 includes an ear plate 42 extending above the circuit board 5, and a gear shaft 7 is disposed on the ear plate 42. A first double gear 31 is mounted on the ear plate 42, and a second double gear 32 is mounted in the middle of the shaft bracket 4. A height difference is formed between the upper end face of the middle of the shaft bracket 4 and the upper end face of the ear plate 42. The ear plate 42 extends above the circuit board 5, and the first double gear 31 is disposed above the circuit board 5, further compressing the overall width of the transmission assembly, resulting in a more compact structure.

[0040] In this embodiment, the geared motor 2 includes a motor stator 21 and a motor rotor 22. The motor stator 21 is fixed to the housing 11, and the motor rotor 22 is rotatably housed within the motor stator 21. A motor gear 23 is provided at one end of the motor rotor 22 away from the motor stator 21. The motor gear 23 passes through the circuit board 5 and meshes with the transmission gear set.

[0041] Specifically, the motor stator 21 is provided with multiple pins 24, which are connected to the circuit board 5. The motor stator 21 is electrically connected to the circuit board 5 through the pins 24. It also includes a rotor shaft 8, and the motor rotor 22 is rotatably mounted on the upper cover 12 and the housing 11 through the rotor shaft 8.

[0042] After passing through the through hole reserved in the middle of the circuit board 5, the motor gear 23 meshes with the large gear of the first double gear 31. The ear plate 42 with shaft bracket 4 passes through the slot reserved on the edge of the circuit board 5 and extends to the top of the circuit board 5. The first double gear 31, the second double gear 32, the third double gear 33, and the output gear 34 are staggered and partially overlapped, effectively utilizing vertical space. Through reasonable gear arrangement and component distribution, the actuator is compacted.

[0043] To further achieve a compact transmission, in this embodiment, both the large and small gears of the first double gear 31 are helical gears. Correspondingly, the large gear of the motor gear 23 and the second double gear 32 are also helical gears. This design allows the driving wheel to be minimized, increasing the transmission ratio and output torque.

[0044] This specification uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A compact high-torque actuator, characterized in that: The device includes a housing, a top cover, a geared motor, a transmission assembly, a shaft bracket, and a circuit board. The housing and the top cover are mutually fitted together. The geared motor, the shaft bracket, and the circuit board are all installed inside the housing. The transmission assembly is installed on the housing via the shaft bracket. The two ends of the geared motor are respectively installed on the housing and the top cover. The geared motor is electrically connected to the circuit board. The shaft bracket includes multiple gear shafts, the shaft bracket is mounted on the housing and the gear shafts are connected to the upper cover; The transmission assembly is disposed between the housing and the top cover and is mounted on the housing via a shaft bracket. The transmission assembly includes an output gear and a transmission gear set for deceleration. The geared motor, the transmission gear set, and the output gear are rotatably connected in sequence.

2. The compact high-torque actuator according to claim 1, characterized in that: The transmission gear set includes a first double gear, a second double gear, and a third double gear. The first and second double gears are both mounted on a gear shaft. One end of the third double gear is movably connected to the upper cover, and the other end is movably connected to the housing. One end of the output gear is mounted on the gear shaft, and the other end is movably connected to the housing.

3. A compact high-torque actuator according to claim 2, characterized in that: Both the large and small gears of the first double gear are helical gears.

4. A compact high-torque actuator according to claim 2, characterized in that: The end of the output gear is exposed outside the housing, and the exposed end of the output gear has an irregular structure for connecting to the output shaft.

5. A compact high-torque actuator according to claim 2, characterized in that: An external sealing ring is provided at the connection between the output gear and the housing.

6. A compact high-torque actuator according to claim 1, characterized in that: The shaft bracket includes a downwardly extending insert plate, which is fixed to the housing.

7. A compact high-torque actuator according to claim 1, characterized in that: The shaft bracket includes an ear plate extending above the circuit board, and a gear shaft is disposed on the ear plate.

8. A compact high-torque actuator according to claim 1, characterized in that: The geared motor includes a motor stator and a motor rotor. The motor stator is fixed to the housing. The motor rotor has a motor gear at one end away from the motor stator. The motor gear passes through the circuit board and meshes with the transmission gear set.

9. A compact high-torque actuator according to claim 8, characterized in that: The motor stator is provided with multiple pins, which are connected to the circuit board.

10. A compact high-torque actuator according to claim 8, characterized in that: It also includes a rotor shaft, through which the motor rotor is rotatably mounted to the upper cover and housing.

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