Compact high-precision rotary actuator

Abstract

The invention discloses a compact type high-precision rotary actuator which comprises a shell and further comprises a motor arranged in the shell, and the output end of the motor is provided with a worm; the gear transmission system is arranged in the shell, and the power input end of the gear transmission system is in driving connection with the worm; the potentiometer is arranged in the shell, a carbon brush in the potentiometer is in driving connection with the power output end of the gear transmission system, the voltage value output end of the potentiometer is connected with an external controller, and the position of the compact type high-precision rotary actuator is recognized and controlled. Compared with the prior art, the invention has the following characteristics: 1) the output torque is small, the structure is compact, the installation space is small, and the adaptability of the product is improved; (2) the output angle can be adjusted according to practical working conditions, and the mechanical adjustment angle is 360 degrees; and 3) a position identification element is integrated in the actuator and is separated from a controller end, and compared with a position reading module and a control module which exist independently, the modularization of the actuator with the position identification function is realized, and the application range is wide.

Description

Technical Field

[0001] The invention relates to the field of machinery, and in particular to a compact high-precision rotary actuator. Background Art

[0002] With the continuous improvement of automobile manufacturing level, modern automobile products are developing in the direction of intelligence. As an important part of automobile intelligence, some vehicle external equipment needs to rotate, translate and perform various motion operations in the car. In the case of relatively small space in the car, most of the external equipment currently has a single action when rotating, and the problem of occupying a large space when rotating and translating is very prominent. In addition, the existing rotary actuator has low rotation accuracy, the mechanics and control are not separated, and it is not compact enough.

[0003] Chinese utility model patent authorization announcement number CN207315094U discloses an actuator for a small door cover for an automobile, comprising an upper cover, a lower cover, a motor for driving, a worm and a gear transmission mechanism arranged on the output shaft of the motor, wherein the motor, the worm and the gear transmission mechanism are all placed in a cavity formed between the upper cover and the lower cover, and a sensing element for collecting information on the rotation change of the motor is installed on the motor, and the actuator provides a torque for opening or closing the small door cover through the output shaft of the gear transmission mechanism.

[0004] Chinese invention patent application publication number CN116658572A discloses an actuator for motor stall, a motor assembly and an output torque control method, including a worm gear mechanism, the worm gear mechanism is connected to an output shaft; the worm gear mechanism includes a worm connected to the motor shaft; the worm is connected to the output shaft through a turbine; the turbine is connected to the output shaft through an elastic mechanism. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a compact high-precision rotary actuator which separates mechanics and control and realizes modularization, in order to solve the above technical problems existing in the prior art.

[0006] In order to achieve the above-mentioned object of the invention, the compact high-precision rotary actuator of the present invention comprises a housing and further comprises:

[0007] a motor disposed in the housing, wherein the output end of the motor has a worm;

[0008] A gear transmission system is arranged in the housing, wherein a power input end of the gear transmission system is drivingly connected to the worm;

[0009] A potentiometer is arranged in the housing, a carbon brush in the potentiometer is drivingly connected to the power output end of the gear transmission system, and a voltage value output end of the potentiometer is connected to an external controller to realize the recognition and control of the position of the compact high-precision rotary actuator.

[0010] In a preferred embodiment of the present invention, it further includes a terminal component disposed in the housing, one end of the terminal component extends out of the housing to be connected to an external power source, and the other end of the terminal component is connected to a terminal of the motor coil.

[0011] In a preferred embodiment of the present invention, the gear transmission system includes a first double gear, a second double gear and an output gear, the first double gear has a coaxial first large gear and a first small gear, the second double gear has a coaxial second large gear and a second small gear, the output gear has an external gear, the first large gear is meshed with the worm gear, the first small gear is meshed with the second large gear, and the second small gear is meshed with the external gear in the output gear.

[0012] In a preferred embodiment of the present invention, the first large gear is located above the first small gear, and the second small gear is located above the second large gear.

[0013] In a preferred embodiment of the present invention, the output gear also has an internal spline and an output shaft coaxially arranged with the external gear, the internal spline is drivingly connected to the external structure, and the output shaft is drivingly connected to the carbon brush in the potentiometer.

[0014] In a preferred embodiment of the present invention, a special-shaped hole is provided on the potentiometer, and the carbon brush is arranged in the special-shaped hole; a special-shaped shaft is provided at the end of the output shaft, and the special-shaped shaft is inserted into the special-shaped hole to be connected to the carbon brush drive.

[0015] In a preferred embodiment of the present invention, a plug-in barrel and a pair of quick-plug serpentine terminals are provided at one end of the terminal component, and the plug-in barrel is plugged into the motor to achieve a stable mechanical connection between the quick-plug serpentine terminal structure and the motor; a pair of quick-plug serpentine terminals are electrically plug-connected to the terminals of the motor coil; two plug-in terminals are provided at the other end of the terminal component for connecting to an external power supply, and the two plug-in terminals extend out of the housing, and each plug-in terminal is electrically connected to a quick-plug serpentine terminal.

[0016] In a preferred embodiment of the present invention, a pair of quick-plug snake-shaped terminals are disposed on both sides of the plug-in barrel.

[0017] In a preferred embodiment of the present invention, a pair of quick-plug snake-shaped terminals are longitudinally arranged on both sides of the plug-in barrel.

[0018] In a preferred embodiment of the present invention, a plug-in sleeve and a pair of straight terminals are provided at one end of the terminal component, and the plug-in sleeve is plugged into the motor to achieve a stable mechanical connection between the terminal component and the motor; a pair of straight terminals are electrically plug-connected to the terminals of the motor coil; two plug-in terminals are provided at the other end of the terminal component for connecting to an external power supply, the two plug-in terminals extend out of the shell, each plug-in terminal is electrically connected to a straight terminal, the shell includes a box body and a box cover, a pair of rubber damping elements are embedded in the box cover, and a pair of rubber damping elements act on the straight terminals.

[0019] Due to the adoption of the above technical solution, the present invention has the following characteristics compared with the prior art:

[0020] 1) Small output torque, compact structure, small installation space, and improved product adaptability;

[0021] 2) The output angle can be adjusted according to the actual working conditions, and the mechanical adjustment angle is 360°;

[0022] 3) The position identification element is integrated in the actuator, which is separated from the controller. Compared with the position reading and control modules, it exists independently, realizing the modularization of the actuator with position identification function and has a wide range of applications;

[0023] 4) The actuator is equipped with a position identification element, which can identify the output position by reading data from an external controller;

[0024] 5) The output gear is an external gear, internal spline and output shaft in one, with multifunctional size. The electrical connector mechanical structure is designed in a contoured manner. The motor connection structure is directly designed at the output end of the actuator by utilizing the structural characteristics of the product itself, saving space. The quick-plug snake terminal structure cleverly uses the elastic structure and longitudinal layout characteristics of the metal sheet to achieve the connection of the electrical system.

[0025] 6) By utilizing the space between the box body and the box cover, a rubber damping element is added radially to the motor, and the tolerance is increased through the damping characteristics of the rubber damping element to achieve reliable connection of the terminals in a small space.

[0026] 7) The benchmark product also has a position identification module, which is a potentiometer. The present invention integrates the potentiometer at the actuator end and separates it from the controller. In this way, for products with position identification function, only one controller is needed for the benchmark product. In the present invention, the position identification component potentiometer can be added or not according to the actual use conditions.

[0027] 8) The present invention can be used for automotive parts that require rotary actuators, such as vehicle-mounted central control screens, grilles, and air-conditioning vents. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the appearance of a compact high-precision rotary actuator according to Example 1 of the present invention.

[0029] Figure 2 This is one of the cross-sectional views of the compact high-precision rotary actuator according to Embodiment 1 of the present invention.

[0030] Figure 3 This is the second cross-sectional view of the compact high-precision rotary actuator according to the first embodiment of the present invention.

[0031] Figure 4 This is one of the exploded views of the compact high-precision rotary actuator according to Example 1 of the present invention.

[0032] Figure 5 This is a schematic diagram of the terminal structure in the compact high-precision rotary actuator of Example 1 of the present invention.

[0033] Figure 6 This is a schematic diagram of the assembly between the terminals and the motor in the compact high-precision rotary actuator of Example 1 of the present invention.

[0034] Figure 7 Schematic diagram of the output gear structure in the compact high-precision rotary actuator of Example 1 of the present invention.

[0035] Figure 8 4 is a cross-sectional view of an output gear in a compact high-precision rotary actuator according to Embodiment 1 of the present invention.

[0036] Fig. 9 for Fig.10 Left view of .

[0037] Fig.10 for Fig.10 Right view of .

[0038] Fig.11 This is the second exploded view of the compact high-precision rotary actuator of Example 1 of the present invention.

[0039] Fig.12 This is an exploded view of a compact, high-precision rotary actuator according to Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] See also Figures 1 to 11 The compact high-precision rotary actuator shown in the figure includes a housing and a motor 10, a transmission gear train, a terminal component 20, and a potentiometer 30 arranged in the housing.

[0043] The shell includes a box body 41 and a box cover 42, and the box body 41 and the box cover 42 can be fixed together by fasteners or snap-fits.

[0044] The output end of the motor 10 has a worm 11, and the power input end of the gear transmission system is drivingly connected to the worm 11; specifically, the gear transmission system includes a first double gear 50, a second double gear 60 and an output gear 70, the first double gear 50 is installed in the housing through a pin 53, and has a coaxial first large gear 51 and a first small gear 52, the second double gear 60 is installed in the housing through a pin 63, and has a coaxial second large gear 61 and a second small gear 62, and the output gear 70 has an external gear 71. The first large gear 51 is located above the first small gear 52, and the second small gear 62 is located above the second large gear 61.

[0045] The first large gear 51 is meshed with the worm 11 , the first small gear 52 is meshed with the second large gear 61 , the second small gear 62 is meshed with the outer gear 71 in the output gear 70 , and finally the motor 10 drives the output gear 70 to rotate.

[0046] A plug-in sleeve 21 is provided at one end of the terminal component 20, and the plug-in sleeve 21 is plugged into the rotating shaft of the motor 10 to achieve a stable mechanical connection between the terminal component 20 and the motor 10; in addition, a pair of quick-plug-in snake terminals 22a, 22b are provided at one end of the terminal component 20, and the pair of quick-plug-in snake terminals 22a, 22b are electrically plug-connected with the coil terminals 12a, 12b in the motor 10; a pair of quick-plug-in snake terminals 22a, 22b are longitudinally arranged on both sides of the plug-in sleeve 21 to improve tolerance.

[0047] Two plug-in terminals 23a, 23b are provided at the other end of the terminal component 20 for connecting to an external power supply. The two plug-in terminals 23a, 23b extend out of the housing, and each plug-in terminal 23a, 23b is electrically connected to a quick-plug snake terminal 22a, 22b, such as a metal sheet connection. In this way, the elastic characteristics of the metal sheet can be cleverly utilized, arranged longitudinally, and the tolerance can be improved to achieve electrical connection.

[0048] The output gear 70 also has an internal spline 72 and an output shaft 73 coaxially arranged with the external gear 71. The internal spline 72 is transmission-connected to the external structure, and the output shaft 73 is drive-connected to the carbon brush in the potentiometer 30. This can realize functional output in a small space, which not only saves space but also reduces costs.

[0049] A special-shaped hole 31 is provided on the potentiometer 30, and the carbon brush is arranged in the special-shaped hole 31; a special-shaped shaft 73a is provided at the end of the output shaft 73, and the special-shaped shaft 73a is inserted into the special-shaped hole 31 to be connected with the carbon brush drive.

[0050] The compact high-precision rotary actuator of the present invention reaches the motor 10 through the terminal 20 after power is turned on. The worm 11 on the motor 10 drives the first large gear 51 in the first duplex gear 50 to rotate. The first small gear 52 in the first duplex gear 50 transmits power to the second large gear 61 in the second duplex gear 60 through meshing transmission. Then, through external tooth meshing, the movement is transmitted from the second small gear 62 in the second duplex gear 60 to the external gear 71 of the output gear 70. The special-shaped shaft 73a in the output gear 70 is positioned and connected with the potentiometer 30 through the special-shaped hole 31. When the output gear 70 moves, the carbon brush inside the potentiometer 30 is driven to move through the special-shaped hole 31. At the same time, the voltage value at the output end of the potentiometer 30 changes. It is connected to an external controller through a connector to realize the recognition and control of the position of the compact high-precision rotary actuator.

[0051] Example 2

[0052] The difference between this embodiment and embodiment 1 is: Fig.12 A plug-in sleeve 21a is provided at one end of the terminal component 20a, and the plug-in sleeve 21a is plugged into the rotating shaft of the motor 10 to achieve a stable mechanical connection between the terminal component 20a and the motor 10; in addition, a pair of straight terminals 24a and 24b are provided at one end of the terminal component 20a, and the pair of straight terminals 24a and 24b are electrically plug-connected with the coil terminals 12a and 12b in the motor 10; a pair of straight terminals 24a and 24b are longitudinally arranged on both sides of the plug-in sleeve 21 to improve tolerance.

[0053] Two plug-in terminals 25a and 25b are provided at the other end of the terminal component 20a for connecting to an external power supply. The two plug-in terminals 25a and 25b extend out of the shell, and each plug-in terminal 25a and 25b is electrically connected to a straight terminal 24a and 24b, such as a metal sheet connection. In this way, the elastic characteristics of the metal sheet can be cleverly utilized, arranged longitudinally, and the tolerance can be improved to achieve electrical connection.

[0054] A pair of rubber damping elements 81, 82 are embedded on the box cover 41, and the pair of rubber damping elements 81, 82 act on the terminal 20a. The deformation force of the pair of rubber damping elements 81, 82 ensures reliable connection between the straight terminals 24a, 24b and the motor 10, while increasing the installation tolerance.

[0055] The remaining structures of this embodiment are the same as those of embodiment 1.

Claims

1. A compact high-precision rotary actuator, comprising a housing, characterized in that: Also includes: a motor disposed in the housing, wherein the output end of the motor has a worm; A gear transmission system is arranged in the housing, wherein a power input end of the gear transmission system is drivingly connected to the worm; A potentiometer is arranged in the housing, a carbon brush in the potentiometer is drivingly connected to the power output end of the gear transmission system, and a voltage value output end of the potentiometer is connected to an external controller, so as to realize the recognition and control of the position of the compact high-precision rotary actuator.

2. The compact high-precision rotary actuator according to claim 1, characterized in that: It also includes a terminal component arranged in the shell, one end of the terminal component extends out of the shell and is connected to an external power source, and the other end of the terminal is connected to the terminal of the motor coil.

3. The compact high-precision rotary actuator according to claim 1 or 2, characterized in that: The gear transmission system includes a first double gear, a second double gear and an output gear, the first double gear has a coaxial first large gear and a first small gear, the second double gear has a coaxial second large gear and a second small gear, the output gear has an external gear, the first large gear is meshed with the worm gear, the first small gear is meshed with the second large gear, and the second small gear is meshed with the external gear in the output gear.

4. The compact high-precision rotary actuator according to claim 3, characterized in that: The first large gear is located above the first small gear, and the second small gear is located above the second large gear.

5. The compact high-precision rotary actuator according to claim 4, characterized in that: The output gear also has an internal spline and an output shaft coaxially arranged with the external gear. The internal spline is drivingly connected to the external structure, and the output shaft is drivingly connected to the carbon brush in the potentiometer.

6. The compact high-precision rotary actuator according to claim 5, characterized in that: A special-shaped hole is arranged on the potentiometer, and the carbon brush is arranged in the special-shaped hole; a special-shaped shaft is arranged at the end of the output shaft, and the special-shaped shaft is inserted into the special-shaped hole and is driven and connected with the carbon brush.

7. The compact high-precision rotary actuator according to any one of claims 2 to 6, characterized in that: A plug-in sleeve and a pair of quick-plug serpentine terminals are provided at one end of the terminal component, and the plug-in sleeve is plugged into the motor to achieve a stable mechanical connection between the quick-plug serpentine terminal structure and the motor; a pair of quick-plug serpentine terminals are electrically plug-connected to the terminals of the motor coil; two plug-in terminals are provided at the other end of the terminal component for connecting to an external power supply, and the two plug-in terminals extend out of the shell, and each plug-in terminal is electrically connected to a quick-plug serpentine terminal.

8. The compact high-precision rotary actuator according to claim 7, characterized in that: A pair of quick-insertion snake-shaped terminals are arranged on both sides of the plug-in barrel.

9. The compact high-precision rotary actuator according to claim 8, characterized in that: A pair of quick-insertion snake-shaped terminals are longitudinally arranged on both sides of the plug-in barrel.

10. The compact high-precision rotary actuator according to any one of claims 2 to 6, characterized in that: A plug-in sleeve and a pair of straight terminals are provided at one end of the terminal component, and the plug-in sleeve is plugged into the motor to achieve a stable mechanical connection between the terminal component and the motor; a pair of straight terminals are electrically plug-connected to the terminals of the motor coil; two plug-in terminals are provided at the other end of the terminal component for connecting to an external power supply, and the two plug-in terminals extend out of the shell, and each plug-in terminal is electrically connected to a quick-plug snake terminal, and the shell includes a box body and a box cover, and a pair of rubber damping elements are embedded on the box cover, and the pair of rubber damping elements act on the straight terminals.

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