Wire motor device

Abstract

The utility model discloses a stay wire motor device, which comprises a driving motor, a transmission gear set, a driving shaft, a potentiometer and a shell, the shell comprises a bottom shell and a top cover, the bottom shell and the top cover are mutually installed so as to form an accommodating cavity of the shell between the bottom shell and the top cover, the top cover is provided with a top cover through hole, the top cover through hole is communicated with the accommodating cavity, and the potentiometer is arranged in the top cover through hole. Wherein the driving motor, the transmission gear set and the potentiometer are contained in the containing cavity of the shell respectively, the driven end of the driving shaft is located in the containing cavity of the shell, the traction end of the driving shaft extends out of the shell through the top cover penetrating hole of the top cover, and the transmission gear set is connected with the driving motor and the driven end of the driving shaft. The rotating part of the potentiometer is connected to the driven end of the driving shaft in a drivable mode, and when the driving motor drives the driving shaft to rotate around the central axis of the driving shaft through the transmission gear set, the driving shaft drives the rotating part of the potentiometer to rotate relative to the fixed part.

Description

Technical Field

[0001] The utility model relates to a motor device, in particular to a wire-pulling motor device. Background Art

[0002] In the utility model patent with announcement number CN212588223U, the inventor disclosed a wire-pulling motor device, which includes a motor, a worm, a carbon film plate and a spring sheet, the motor is connected to the worm, the carbon film plate includes a first output pin, a second output pin, a third output pin, a plate, a metal layer and a carbon film layer, the first output pin, the second output pin and the third output pin are fastened to the plate, the metal layer is in contact with the first output pin, the second output pin, the third output pin and the carbon film layer, the carbon film layer and the metal layer are printed and sprayed on the plate, and the spring sheet is in contact with the carbon film layer and the metal layer. During operation, the spring sheet contacts the carbon film layer and the metal layer, and the sheet is fixed. When the spring sheet rotates, the voltage between the first output pin and the second output pin and the voltage between the second output pin and the third output pin change with the position of the spring sheet relative to the carbon film layer. The voltage change has a definite and unique correspondence with the rotation angle of the output wheel. The voltage change of the carbon film plate is connected to the corresponding pins of the socket through the lead wires on the PCB board through the first output pin, the second output pin, and the third output pin, and is output to the external controller by the connector. In this way, the external controller drives the output torque of the output wheel through the socket, and at the same time, the rotation angle of the output wheel is sensed by the feedback voltage of the connector. Although the existing wire-pulling motor device can sense the rotation angle of the output wheel according to the feedback voltage, the spring sheet and the carbon film layer of the existing wire-pulling motor device are independent of each other and the spring sheet can rotate relative to the carbon film layer. Therefore, the existing wire-pulling motor device has the problems of high assembly difficulty, low efficiency, and easy wear of the spring sheet and the carbon film layer. Utility Model Content

[0003] One purpose of the utility model is to provide a wire-drawing motor device, wherein the wire-drawing motor device of the utility model uses a potentiometer to replace the spring sheet and the carbon film layer of the prior art. When assembling the wire-drawing motor device, the potentiometer is assembled as a whole to reduce the assembly difficulty of the wire-drawing motor device and improve the assembly efficiency of the wire-drawing motor device.

[0004] One purpose of the utility model is to provide a wire-drawing motor device, wherein compared with the components for detecting voltage composed of spring sheets and carbon film layers in the prior art, the potentiometer used in the utility model has higher reliability, so as to help improve the reliability of the wire-drawing motor device.

[0005] One object of the present utility model is to provide a wire-drawing motor device, wherein the potentiometer and the driving shaft are not coaxial, so that when the driving shaft is subjected to a force perpendicular to the central axis of the driving shaft, the wire-drawing motor device can avoid the force being transmitted to the potentiometer, so as to avoid the rotating part of the potentiometer being laterally offset relative to the fixed part and damaging the potentiometer.

[0006] One purpose of the utility model is to provide a wire-pulling motor device, wherein the circuit board of the wire-pulling motor device and the motor pins of the driving motor and the potentiometer pins of the potentiometer are directly connected. In this way, not only can the connection structure between the circuit board and the driving motor and the potentiometer be simplified, but also the reliability of the connection relationship between the circuit board and the driving motor and the potentiometer can be ensured.

[0007] One purpose of the utility model is to provide a wire pulling motor device, wherein the worm of the driving motor is arranged in a worm cavity, and the worm cavity is filled with grease. In this way, not only can the driving motor be ensured to smoothly drive the driving shaft to rotate around its own central axis through the transmission gear set, but also the noise can be reduced.

[0008] One purpose of the utility model is to provide a wire-drawing motor device, wherein the housing of the wire-drawing motor device can limit the maximum rotation angle of the driving shaft to avoid damage to the potentiometer when an external device controlled by the wire-drawing motor device fails.

[0009] According to one aspect of the present invention, the present invention provides a wire-pulling motor device, comprising:

[0010] Drive motor;

[0011] Transmission gear set;

[0012] a drive shaft, wherein the drive shaft has opposing driven and pulling ends;

[0013] A potentiometer, wherein the potentiometer comprises a fixed portion and a rotating portion rotatably disposed on the fixed portion; and

[0014] A shell, wherein the shell includes a bottom shell and a top cover, the bottom shell and the top cover are installed with each other to form a receiving chamber of the shell between the bottom shell and the top cover, the top cover has a top cover through-hole, and the top cover through-hole is connected to the receiving chamber, wherein the drive motor, the transmission gear set and the potentiometer are respectively received in the receiving chamber of the shell, the driven end of the drive shaft is located in the receiving chamber of the shell, the pulling end of the drive shaft extends to the outside of the shell through the top cover through-hole of the top cover, the transmission gear set connects the rotor of the drive motor and the driven end of the drive shaft, the rotating part of the potentiometer is drivably connected to the driven end of the drive shaft, wherein when the drive motor drives the drive shaft to rotate around its own central axis through the transmission gear set, the drive shaft drives the rotating part of the potentiometer to rotate relative to the fixed part.

[0015] According to one embodiment of the utility model, the wire pulling motor device further includes a potentiometer gear, which is installed on the rotating part of the potentiometer, and the potentiometer gear is engaged with the driven end of the drive shaft to allow the drive shaft to drive the rotating part of the potentiometer to rotate relative to the fixed part through the potentiometer gear.

[0016] According to an embodiment of the utility model, the wire-drawing motor device further includes a circuit board, and the driving motor and the potentiometer are respectively connected to the circuit board.

[0017] According to one embodiment of the utility model, the outer shell includes a hatch cover and a board compartment, the board compartment is formed between the bottom shell and the top cover, the circuit board is arranged in the board compartment of the outer shell, the hatch cover is installed on the bottom shell and the top cover, and the hatch cover is used to close the opening of the board compartment of the outer shell.

[0018] According to one embodiment of the utility model, the extension direction of the motor pin of the driving motor is consistent with the extension direction of the potentiometer pin of the potentiometer, and the extension direction of the motor pin of the driving motor and the extension direction of the circuit board are perpendicular to each other. The motor pin of the driving motor and the potentiometer pin of the potentiometer are welded to the circuit board after passing through the pin holes of the circuit board respectively, so as to respectively connect the driving motor and the potentiometer to the circuit board.

[0019] According to one embodiment of the utility model, the circuit board has an insertion hole, the bottom shell has an insertion arm, the insertion arm extends to the board compartment of the outer shell, and the free end of the insertion arm has a hook platform, wherein the free end of the insertion arm of the bottom shell allows the hook platform of the insertion arm to hook the circuit board after passing through the insertion hole of the circuit board, so as to set the circuit board in the board compartment of the outer shell.

[0020] According to one embodiment of the utility model, the distance that the motor pin of the driving motor protrudes into the board compartment of the outer shell is greater than the distance that the plug-in arm of the bottom shell protrudes into the board compartment of the outer shell, and the distance that the potentiometer pin of the potentiometer protrudes into the board compartment of the outer shell is greater than the distance that the plug-in arm of the bottom shell protrudes into the board compartment of the outer shell.

[0021] According to one embodiment of the utility model, the number of the plug-in arms of the bottom shell is two, and one plug-in arm is respectively arranged on the opposite sides of the potentiometer pin of the potentiometer. Correspondingly, the circuit board has two plug-in holes, and the positions of the two plug-in holes of the circuit board correspond to the positions of the two plug-in arms of the bottom shell, so that each plug-in arm of the bottom shell is respectively plugged into each plug-in hole of the circuit board.

[0022] According to one embodiment of the utility model, one end of the hatch cover has a blocking arm, and the other end has a clamping arm. After the blocking arm of the hatch cover is blocked by the bottom shell or the top cover, the clamping arm of the hatch cover is clamped to the bottom shell or the top cover.

[0023] According to one embodiment of the utility model, one end of the hatch cover has two blocking arms, and the other end has two clamping arms, wherein one of the two blocking arms of the hatch cover is blocked by the bottom shell, and the other blocking arm is blocked by the top cover, and one of the two clamping arms of the hatch cover is clamped by the bottom shell, and the other clamping arm is clamped with the top cover.

[0024] According to one embodiment of the utility model, the transmission gear set includes a first gear, a second gear and the third gear, the first gear is respectively meshed with the worm of the drive motor and the second gear, the third gear is respectively meshed with the second gear and the driven end of the drive shaft, the worm is installed on the rotor of the drive motor, wherein the second gear is located in the lower layer so that the second gear is adjacent to the bottom shell, and the first gear and the third gear are located in the upper layer so that the first gear and the third gear are adjacent to the top cover.

[0025] According to one embodiment of the utility model, the transmission gear set includes a first gear, a second gear and the third gear, the first gear has a first large gear and a first small gear, the first large gear is located above the first small gear, the second gear has a second large gear and a second small gear, the second large gear is located below the second small gear, the third gear has a third large gear and a third small gear, the third large gear is located below the third small gear, the driven end of the drive shaft has a fourth large gear and a fourth small gear, the fourth large gear is located above the fourth small gear, wherein the first large gear of the first gear is meshed with the worm of the drive motor, the first small gear of the first gear is meshed with the second large gear of the second gear, the second small gear of the second gear is meshed with the third large gear of the third gear, the fourth small gear at the driven end of the drive shaft is meshed with the potentiometer gear, and the fourth large gear at the driven end of the drive shaft is meshed with the third small gear of the third gear.

[0026] According to one embodiment of the utility model, the accommodating cavity of the housing is divided into a gear cavity and a motor cavity, the motor cavity having a motor mounting cavity and a worm cavity connected to the motor mounting cavity, the housing having a gear channel, the gear channel connecting the gear cavity and the worm cavity, wherein the drive motor is installed in the motor mounting cavity, the worm of the drive motor is rotatably retained in the worm cavity, the transmission gear set is arranged in the gear cavity, and a part of one of the gears in the transmission gear set extends to the worm cavity through the gear channel to engage with the worm of the drive motor, wherein the worm cavity is filled with grease.

[0027] According to one embodiment of the utility model, the accommodating cavity of the housing is divided into a gear cavity and a motor cavity, the motor cavity having a motor mounting cavity and a worm cavity connected to the motor mounting cavity, the housing having a gear channel, the gear channel connecting the gear cavity and the worm cavity, wherein the drive motor is installed in the motor mounting cavity, the worm of the drive motor is rotatably retained in the worm cavity, the transmission gear set is arranged in the gear cavity, and a portion of the first gear extends to the worm cavity through the gear channel to engage with the worm of the drive motor, wherein the worm cavity is filled with grease.

[0028] According to one embodiment of the utility model, a first limiting portion is provided on the side of the driving shaft, and a second limiting portion is provided on the edge of the perforation of the top cover. When the driving shaft rotates around its own central axis, the second limiting portion of the top cover blocks the first limiting portion of the driving shaft to limit the maximum rotation angle.

[0029] According to an embodiment of the utility model, the first limiting portion of the driving shaft is a first protrusion protruding from the side of the driving shaft, and the second limiting portion of the top cover is a second protrusion protruding from the inner wall of the top cover.

[0030] According to another aspect of the present invention, the present invention further provides a wire-pulling motor device, comprising:

[0031] Drive motor;

[0032] a drive shaft, wherein the drive shaft has opposing driven and pulling ends;

[0033] a transmission gear set, wherein the transmission gear set comprises a first gear, a second gear and a third gear; and

[0034] The outer shell comprises a bottom shell and a top cover, the bottom shell and the top cover are installed with each other to form a receiving chamber of the outer shell between the bottom shell and the top cover, the top cover has a top cover through-hole, the top cover through-hole is connected to the receiving chamber, wherein the driving motor, the transmission gear set and the potentiometer are respectively received in the receiving chamber of the outer shell, the driven end of the driving shaft is located in the receiving chamber of the outer shell, the pulling end of the driving shaft extends to the outside of the outer shell through the top cover through-hole of the top cover, the first gear is respectively engaged with the worm of the driving motor and the second gear, the third gear is respectively engaged with the second gear and the driven end of the driving shaft, wherein the second gear is located in the lower layer so that the second gear is adjacent to the bottom shell, and the first gear and the third gear are located in the upper layer so that the first gear and the third gear are adjacent to the top cover.

[0035] According to one embodiment of the utility model, the accommodating cavity of the housing is divided into a gear cavity and a motor cavity, the motor cavity having a motor mounting cavity and a worm cavity connected to the motor mounting cavity, the housing having a gear channel, the gear channel connecting the gear cavity and the worm cavity, wherein the drive motor is installed in the motor mounting cavity, the worm of the drive motor is rotatably retained in the worm cavity, the transmission gear set is arranged in the gear cavity, and a portion of the first gear extends to the worm cavity through the gear channel to engage with the worm of the drive motor, wherein the worm cavity is filled with grease.

[0036] According to one embodiment of the utility model, a first limiting portion is provided on the side of the driving shaft, and a second limiting portion is provided on the edge of the perforation of the top cover. When the driving shaft rotates around its own central axis, the second limiting portion of the top cover blocks the first limiting portion of the driving shaft to limit the maximum rotation angle of the driving shaft.

[0037] According to one embodiment of the utility model, the assembly order of the first gear, the second gear, the third gear and the drive shaft is: first, assemble the second gear; second, assemble the first gear and the third gear, at which time the first gear is respectively engaged with the worm gear and the second gear of the drive motor, and the third gear is engaged with the second gear; third, assemble the drive shaft, at which time the drive shaft is engaged with the third gear.

[0038] According to one embodiment of the utility model, the first gear has a first large gear and a first small gear, the first large gear is located above the first small gear, the second gear has a second large gear and a second small gear, the second large gear is located below the second small gear, the third gear has a third large gear and a third small gear, and the third large gear is located below the third small gear, wherein the first large gear of the first gear meshes with the worm of the drive motor, the second large gear of the second gear meshes with the first small gear of the first gear, the third large gear of the third gear meshes with the second small gear of the second gear, and the driven end of the drive shaft meshes with the third small gear of the third gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a three-dimensional schematic diagram of one of the assembly steps of a wire-pulling motor device according to a preferred embodiment of the utility model.

[0040] Figure 2 It is a three-dimensional schematic diagram of the second assembly step of the wire-pulling motor device according to the above preferred embodiment of the present utility model.

[0041] Figure 3 It is a three-dimensional schematic diagram of the third assembly step of the wire-pulling motor device according to the above preferred embodiment of the present utility model.

[0042] Figure 4 It is a three-dimensional schematic diagram of the fourth assembly step of the wire-pulling motor device according to the above preferred embodiment of the present utility model.

[0043] Figure 5 It is a three-dimensional schematic diagram of the fifth assembly step of the wire-pulling motor device according to the above preferred embodiment of the present utility model.

[0044] Figure 6 It is a three-dimensional schematic diagram of the sixth assembly step of the wire-pulling motor device according to the above preferred embodiment of the present utility model.

[0045] Figure 7It is a three-dimensional schematic diagram of the seventh assembly step of the wire-pulling motor device according to the above preferred embodiment of the utility model, which shows the three-dimensional state of the wire-pulling motor device.

[0046] Figure 8 It is the first exploded schematic diagram of the wire-pulling motor device according to the above preferred embodiment of the utility model.

[0047] Fig. 9 It is a second exploded schematic diagram of the wire-pulling motor device according to the above preferred embodiment of the utility model.

[0048] Fig.10 It is a third exploded schematic diagram of the wire-pulling motor device according to the above preferred embodiment of the utility model.

[0049] Fig.11 It is a fourth exploded schematic diagram of the wire-pulling motor device according to the above preferred embodiment of the utility model.

[0050] Fig.12 It is the fifth exploded schematic diagram of the wire-pulling motor device according to the above preferred embodiment of the utility model.

[0051] Fig.13 It is a cross-sectional schematic diagram of a first position of the wire-pulling motor device according to the above preferred embodiment of the utility model from a viewing angle.

[0052] Fig.14 yes Fig.13 A magnified schematic diagram of the local location.

[0053] Fig.15 It is a cross-sectional schematic diagram of the wire-pulling motor device at the above position from another perspective according to the above preferred embodiment of the utility model.

[0054] Fig.16 It is a cross-sectional schematic diagram from a perspective of the second position of the wire-pulling motor device according to the above preferred embodiment of the utility model.

[0055] Fig.17 It is a cross-sectional schematic diagram of the wire-pulling motor device at the above position from another perspective according to the above preferred embodiment of the utility model.

[0056] Fig.18 It is a cross-sectional schematic diagram of the third position of the wire-pulling motor device according to the above preferred embodiment of the utility model. DETAILED DESCRIPTION

[0057] Before describing in detail any embodiment of the utility model, it should be understood that the utility model is not limited to the construction and arrangement details of the components described below or illustrated in the following figures in its application. The utility model can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for the purpose of description and should not be considered as restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.

[0058] Furthermore, on the first aspect, in the disclosure of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0059] Refer to the attached drawings of the specification of this utility model Figures 1 to 18 A wire-pulling motor device according to a preferred embodiment of the utility model will be disclosed and explained in the following description, wherein the wire-pulling motor device includes a housing 10 and a driving motor 20, a driving shaft 30, a transmission gear set 40 and a potentiometer 50 respectively arranged on the housing 10.

[0060] Specifically, the housing 10 includes a bottom housing 11 and a top cover 12, and the housing 10 has a receiving cavity 101, the bottom housing 11 and the top cover 12 are mounted on each other to form the receiving cavity 101 of the housing 10 between the bottom housing 11 and the top cover 12, wherein the top cover 12 has a top cover through hole 121, and the top cover through hole 121 of the top cover 12 is in communication with the receiving cavity 101 of the housing 10. The driving motor 20 is received in the receiving cavity 101 of the housing 10. The drive shaft 30 has a driven end 31 and a pulling end 32 relative to the driven end 31. The driven end 31 of the drive shaft 30 is received in the receiving cavity 101 of the housing 10. The pulling end 32 of the drive shaft 30 extends to the outside of the housing 10 through the top cover through hole 121 of the top cover 12. The pulling end 32 of the drive shaft 30 is configured to be connected to a pull wire. The transmission gear set 40 is received in the receiving cavity 101 of the housing 10, and the transmission gear set 40 connects the rotor 21 of the drive motor 20 and the driven end 31 of the drive shaft 30. The potentiometer 50 is received in the receiving cavity 101 of the housing 10, and the potentiometer 50 includes a fixed portion 51 and a rotating portion 52 rotatably disposed on the fixed portion 51. The rotating portion 52 of the potentiometer 50 is drivably connected to the driven end 31 of the drive shaft 30.

[0061] When the rotor 21 of the drive motor 20 rotates to allow the drive motor 20 to output power, the rotor 21 of the drive motor 20 drives the driven end 31 of the drive shaft 30 through the transmission gear set 40, so that the drive shaft 30 rotates around its own central axis to pull or release the pull wire. At the same time, the driven end 31 of the drive shaft 30 drives the rotating part 52 of the potentiometer 50 to rotate relative to the fixed part 51 to change the resistance value of the potentiometer 50. Since there is a one-to-one correspondence between the resistance value of the potentiometer 50 and the rotation angle of the drive shaft 30, the rotation angle of the drive shaft 30 can be obtained by obtaining the resistance value of the potentiometer 50.

[0062] Compared with the prior art wire drawing motor device that obtains the voltage change value by allowing the spring sheet to rotate relative to the carbon film layer, when assembling the wire drawing motor device of the utility model, the potentiometer 50 can be assembled as a whole to reduce the assembly difficulty of the wire drawing motor device and improve the assembly efficiency of the wire drawing motor device. At the same time, compared with the prior art wire drawing motor device, the potentiometer 50 used in the wire drawing motor device of the utility model has higher reliability, which is conducive to improving the reliability of the wire drawing motor device.

[0063] Reference Figure 4 , Fig.13 and Fig.15 , the drive shaft 30 and the potentiometer 50 are not coaxial, so when the drive shaft 30 is subjected to a force perpendicular to the central axis direction of the drive shaft 30, for example, when the drive shaft 30 pulls an external device (the external device can be an internal magnetic control device or an external magnetic control device applied to fitness equipment such as a spinning bike) through a pull wire in a rotational manner, the drive shaft 30 will be subjected to a force perpendicular to the central axis direction of the drive shaft 30, and the pull wire motor device can prevent the force from being transmitted to the potentiometer 50, so as to prevent the rotating part 52 of the potentiometer 50 from being laterally offset relative to the fixed part 51 and damaging the potentiometer 50, so as to protect the potentiometer 50, thereby improving the reliability of the pull wire motor device.

[0064] Specifically, the wire pulling motor device further includes a potentiometer gear 60, the potentiometer gear 60 is installed on the rotating part 52 of the potentiometer 50, and the potentiometer gear 60 is meshed with the driven end 31 of the drive shaft 30. When the rotor 21 of the drive motor 20 drives the driven end 31 of the drive shaft 30 through the transmission gear set 40 to rotate the drive shaft 30 around its own central axis, the driven end 31 of the drive shaft 30 drives the potentiometer gear 60 to rotate, so that the potentiometer gear 60 drives the rotating part 52 of the potentiometer 50 to rotate relative to the driven end 31 of the drive shaft 30. The fixed part 51 rotates to change the resistance of the potentiometer 50, so that the drive shaft 30 and the potentiometer 50 may not be coaxial. Therefore, when the drive shaft 30 pulls the external device by pulling the wire in a rotational manner and causes the drive shaft 30 to be subjected to a force perpendicular to the central axis of the drive shaft 30, the wire-pulling motor device can prevent the force from being transmitted to the potentiometer 50, so as to prevent the rotating part 52 of the potentiometer 50 from being laterally offset relative to the fixed part 51 and damaging the potentiometer 50, thereby protecting the potentiometer 50 and improving the reliability of the wire-pulling motor device.

[0065] It is worth mentioning that the specific manner in which the potentiometer gear 60 is mounted on the rotating portion 52 of the potentiometer 50 is not limited in the wire-drawing motor device of the present invention. Fig.18, one end of the mounting shaft of the potentiometer gear 60 is inserted into the mounting hole 521 of the rotating part 52 to mount the potentiometer gear 60 on the rotating part 52. Optionally, in other examples of the wire-pulling motor device of the present invention, the potentiometer gear 60 can also be sleeved on the rotating part 52 to mount the potentiometer gear 60 on the rotating part 52.

[0066] Reference Figure 8 , Fig. 9 , Fig.11 and Fig.12 The wire drawing motor device further includes a circuit board 70, the drive motor 20 and the potentiometer 50 are respectively connected to the circuit board 70, wherein the circuit board 70 can control the working state of the drive motor 20 according to the resistance value fed back by the potentiometer 50, for example, the circuit board 70 can be integrated with an MCU to allow the circuit board 70 to control the working state of the drive motor 20 according to the resistance value fed back by the potentiometer 50. It can be understood that the circuit board 70 can control the rotation angle of the drive shaft 30 by controlling the working state of the drive motor 20 according to the resistance value fed back by the potentiometer 50, thereby controlling the state of the external device.

[0067] Reference Figures 7 to 13 , Figures 15 to 18 The housing 10 further comprises a board compartment 102, the board compartment 102 is formed between the bottom housing 11 and the top cover 12, and the circuit board 70 is arranged in the board compartment 102 of the housing 10. The housing 10 further comprises a compartment cover 13, the compartment cover 13 is mounted on the bottom housing 11 and the top cover 12, and the compartment cover 13 is used to close the opening of the board compartment 102 of the housing 10, so that the circuit board 70 can be hidden to protect the circuit board 70.

[0068] It is worth mentioning that the specific manner in which the hatch 13 is mounted on the bottom shell 11 and the top cover 12 is not limited in the wire-pulling motor device of the present invention. Figures 1 to 18In this specific example of the wire-pulling motor device of the utility model shown, one end of the hatch cover 13 has two blocking arms 131, and the other end has two clamping arms 132. After one of the two blocking arms 131 of the hatch cover 13 is blocked by the bottom shell 11 and the other blocking arm 131 is blocked by the top cover 12, one of the two clamping arms 132 of the hatch cover 13 is clamped to the bottom shell 11 and the other clamping arm 132 is clamped to the top cover 12, so that the hatch cover 13 is installed on the bottom shell 11 and the top cover 12. Optionally, in other examples of the wire-pulling motor device of the present invention, the number of the blocking arm 131 and the clamping arm 132 of the hatch cover 13 can be one respectively, wherein after the blocking arm 131 of the hatch cover 13 is blocked by the bottom shell 11 or the top cover 12, the clamping arm 132 of the hatch cover 13 is clamped to the bottom shell 11 or the top cover 12 to install the hatch cover 13 on the bottom shell 11 and the top cover 12.

[0069] Preferably, the hatch cover 13 has at least one hatch cover through-hole 133, and the position of the hatch cover through-hole 133 of the hatch cover 13 corresponds to the position of the wiring port 71 of the circuit board 70, so that the wiring terminal can be inserted into the wiring port 71 of the circuit board 70 through the hatch cover through-hole 133 of the hatch cover 13. It can be understood that the number of the hatch cover through-holes 133 of the hatch cover 13 corresponds to the number of the wiring ports 71 of the circuit board 70. For example, in the attached Figures 1 to 18 In the specific example of the wire-drawing motor device of the present invention shown, the number of the wiring ports 71 of the circuit board 70 and the number of the hatch through-holes 131 of the hatch 13 are both two.

[0070] Reference Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Figures 11 to 15The extension direction of the motor pin 22 of the driving motor 20 is consistent with the extension direction of the potentiometer pin 53 of the potentiometer 50. The extension direction of the motor pin 22 of the driving motor 20 and the extension direction of the potentiometer pin 53 of the potentiometer 50 are both perpendicular to the extension direction of the circuit board 70. The circuit board 70 has a plurality of pin through holes 72. The motor pin 22 of the driving motor 20 and the potentiometer pin 53 of the potentiometer 50 are respectively passed through the pin through holes 72 of the circuit board 70 and then soldered to the circuit board 70 to respectively connect the driving motor 20 and the potentiometer pin 53. The motor 20 and the potentiometer 50 are on the circuit board 70. Through the above-mentioned structure, no connecting wire is required whether when connecting the motor pin 22 of the driving motor 20 and the circuit board 70 or when connecting the potentiometer pin 53 of the potentiometer 50 and the circuit board 70. In this way, not only can the connection structure between the driving motor 20 and the circuit board 70 and between the potentiometer 50 and the circuit board 70 be simplified, but also the reliability of the connection relationship between the driving motor 20 and the circuit board 70 and between the potentiometer 50 and the circuit board 70 can be ensured.

[0071] That is, the motor pin 22 of the driving motor 20 and the circuit board 70 may be directly welded, and the potentiometer pin 53 of the potentiometer 50 and the circuit board 70 may be directly welded.

[0072] Furthermore, the circuit board 70 has at least one insertion hole 73, the bottom shell 11 has at least one insertion arm 111, the insertion arm 111 extends to the board compartment 102 of the outer shell 10, and the free end of the insertion arm 111 has a hook platform 1111. When installing the circuit board 70 in the board compartment 102 of the outer shell 10, after the free end of the insertion arm 111 of the bottom shell 11 passes through the insertion hole 73 of the circuit board 70, the hook platform 1111 of the insertion arm 111 hooks the circuit board 70 to set the circuit board 70 in the board compartment 102 of the outer shell 10 to prevent the circuit board 70 from shaking in the board compartment 102 of the outer shell 10.

[0073] Preferably, the number of the plug-in arms 111 of the bottom shell 11 is two, and one plug-in arm 111 is respectively provided on the opposite sides of the potentiometer pin 53 of the potentiometer 50. Correspondingly, the number of the plug-in holes 73 of the circuit board 70 is two, and the positions of the two plug-in holes 73 of the circuit board 70 correspond to the positions of the two plug-in arms 111 of the bottom shell 11. In this way, each of the plug-in arms 111 of the bottom shell 11 is respectively plugged into each of the plug-in holes 73 of the circuit board 70, so as to reliably set the circuit board 70 in the board compartment 102 of the outer shell 10.

[0074] Preferably, the distance that the motor pin 22 of the driving motor 20 protrudes into the board compartment 102 of the housing 10 and the distance that the potentiometer pin 53 of the potentiometer 50 protrudes into the board compartment 102 of the housing 10 are both greater than the distance that the insertion arm 111 of the bottom shell 11 protrudes into the board compartment 102 of the housing 10, so that when the circuit board 70 is set in the board compartment 102 of the housing 10, firstly, the motor pin 22 of the driving motor 20 and the potentiometer pin 53 of the potentiometer 50 penetrate the pin through-hole 72 of the circuit board 70, and secondly, the insertion arm 111 of the bottom shell 11 is inserted into the circuit board 70. The insertion hole 73, and finally, the motor pin 22 of the drive motor 20 and the potentiometer pin 53 of the potentiometer 50 are welded to the circuit board 70. In the above manner, during the process of setting the circuit board 70 in the board compartment 102 of the housing 10, the motor pin 22 of the drive motor 20 and the potentiometer pin 53 of the potentiometer 50 are driven to penetrate the pin through-hole 72 of the circuit board 70. After the circuit board 70 is set in the board compartment 102 of the housing 10, it is convenient to weld the motor pin 22 of the drive motor 20 and the potentiometer pin 53 of the circuit board 50 to the circuit board 70.

[0075] That is to say, by allowing the motor pin 22 of the driving motor 20 to protrude into the board compartment 102 of the outer shell 10 and the potentiometer pin 53 of the potentiometer 50 to protrude into the board compartment 102 of the outer shell 10 to be greater than the distance that the plug-in arm 111 of the bottom shell 11 protrudes into the board compartment 102 of the outer shell 10, during the process of installing the circuit board 70 in the board compartment 102 of the outer shell 10, it can be ensured that the motor pin 22 of the driving motor 20 and the potentiometer pin 53 of the potentiometer 50 are inserted into the pin through-hole 72 of the circuit board 70.

[0076] Reference Fig.13 , Figures 15 to 17The transmission gear set 40 includes a first gear 41, a second gear 42 and a third gear 43, the first gear 41 is respectively meshed with the worm 23 and the second gear 42 of the drive motor 20, the worm 23 of the drive motor 20 is installed on the rotor 21, and the third gear 43 is respectively meshed with the second gear 42 and the driven end 31 of the drive shaft 30, wherein when the rotor 21 and the worm 23 of the drive motor 20 rotate to allow the drive motor 20 to output power, the first gear 41, the second gear 42 and the third gear 43 of the transmission gear set 40 rotate in sequence to drive the driven end 31 of the drive shaft 30, so that the drive shaft 30 rotates around its own central axis to pull or release the pull wire, thereby operating an external device. In the wire-pulling motor device of the present invention, the second gear 42 is located in the lower layer, that is, the second gear 42 is adjacent to the bottom shell 11, and the first gear 41 and the third gear 43 are located in the upper layer, that is, the first gear 41 and the third gear 43 are adjacent to the top cover 12. In this way, when assembling the wire-pulling motor device, first, the second gear 42 is assembled, and then, the first gear 41 and the third gear 43 are assembled, which is conducive to the automated assembly of the wire-pulling motor device.

[0077] Specifically, the first gear 41 has a first large gear 411 and a first small gear 412, and the first large gear 411 is located above the first small gear 412. The second gear 42 has a second large gear 421 and a second small gear 422, and the second large gear 421 is located below the second small gear 422. The third gear 43 has a third large gear 431 and a third small gear 432, and the third large gear 431 is located below the third small gear 432. The first large gear 411 of the first gear 41 is meshed with the worm 23 of the driving motor 20, the first small gear 412 of the first gear 41 is meshed with the second large gear 421 of the second gear 42, and the third large gear 431 of the second gear 42 is meshed with the third small gear 432. The second small gear 422 is meshed with the third large gear 431 of the third gear 43, the driven end 31 of the drive shaft 30 has a fourth large gear 311 and a fourth small gear 312, the fourth large gear 311 is located above the fourth small gear 312, the fourth large gear 311 of the driven end 31 of the drive shaft 30 is meshed with the third small gear 432 of the third gear 43, the fourth small gear 312 is meshed with the potentiometer gear 60, so that when assembling the wire-pulling motor device, the second gear 42, the potentiometer gear 60, the first gear 41, the third gear 43 and the drive shaft 30 can be assembled in sequence without interference with each other, which is conducive to the automated assembly of the wire-pulling motor device.

[0078] It is worth mentioning that in order to ensure the relative position stability of the driving shaft 30 and the first gear 41, the second gear 42 and the third gear 43 of the transmission gear set 40, the driven end 31 of the driving shaft 30 is rotatably mounted on the bottom shell 11. Since the pulling end 32 of the driving shaft 30 extends to the outside of the outer shell 10 through the top cover through hole 121 of the top cover 12, the driving shaft 30 can only rotate around its own center axis. The opposite sides of the first gear 41, the opposite sides of the second gear 42 and the opposite sides of the third gear 43 are all rotatably mounted on the bottom shell 11 and the top cover 12, so the first gear 41, the second gear 42 and the third gear 43 can also only rotate around their own center axis.

[0079] Furthermore, the receiving chamber 101 of the housing 10 is divided into a gear chamber 1011 and a motor chamber 1012, the motor chamber 1012 has a motor mounting chamber 10121 and a worm chamber 10122 connected to the motor mounting chamber 10121, the housing 10 has a gear channel 103, the gear channel 103 connects the gear chamber 1011 and the worm chamber 10122, wherein the drive motor 20 is installed in the motor mounting chamber 10121, and the worm 23 can be The first gear 41 is rotatably retained in the worm cavity 10122, the transmission gear set 40 is arranged in the gear cavity 1011, a portion of the first gear 41 extends to the worm cavity 10122 through the gear channel 103 to engage with the worm 23 of the drive motor 20, and the worm cavity 10122 is filled with grease, so that it can not only ensure that the drive motor 20 can smoothly drive the drive shaft 30 to rotate around its own central axis through the transmission gear set 40, but also reduce noise.

[0080] Specifically, the bottom shell 11 has a bottom shell gear groove 112, a bottom shell motor groove 113, and a bottom shell notch 114 connecting the bottom shell gear groove 112 and the bottom shell motor groove 113, and the top cover 12 has a top cover gear groove 122, a top cover motor groove 123, and a top cover notch 124 connecting the top cover gear groove 122 and the top cover motor groove 123, which are independent of each other. After the bottom shell 11 and the top cover 12 are mounted on each other, the position of the bottom shell gear groove 112 corresponds to the position of the top cover gear groove 122 to form the gear cavity 1011, the position of the bottom shell motor groove 113 corresponds to the position of the top cover motor groove 123 to form the motor cavity 1012, and the position of the bottom shell notch 114 corresponds to the position of the top cover notch 124 to form the gear channel 103.

[0081] Furthermore, the bottom shell 11 has a potentiometer groove 115, and the side notch of the potentiometer groove 115 faces the board compartment 102 of the outer shell 10. The two plug-in arms 111 of the bottom shell 11 are respectively located on opposite sides of the side notch of the potentiometer groove 115. After the potentiometer 50 is installed in the potentiometer groove 115, the potentiometer pin 53 of the potentiometer 50 protrudes into the board compartment 102 of the outer shell 10 through the side notch of the potentiometer groove 115, so that when the circuit board 70 is set in the board compartment 102 of the outer shell 10, the potentiometer pin 53 of the potentiometer 50 can penetrate the pin through-hole 73 of the circuit board 70.

[0082] Reference Fig.11 and Fig.12, a first limiting portion 33 is provided on the side of the driving shaft 30, and a second limiting portion 125 is provided on the edge of the top cover through hole 121 of the top cover. The second limiting portion 125 of the top cover 12 is located on the rotation path of the first limiting portion 33 of the driving shaft 30, so that when the driving shaft 30 is driven to rotate around its own central axis, the second limiting portion 125 of the top cover 12 blocks the first limiting portion 33 of the driving shaft 30 to limit the maximum rotation angle of the driving shaft 30, thereby avoiding damage to the potentiometer 50 when the external device controlled by the wire drawing motor device fails. Preferably, the first limiting portion 33 of the driving shaft 30 is a first protrusion protruding from the side of the driving shaft 30, and the second limiting portion 125 of the top cover 12 is a second protrusion protruding from the inner wall of the top cover 12.

[0083] Attached Figures 1 to 7 The assembly process of the wire-pulling motor device of the present invention is shown, and the specific steps are as follows.

[0084] First, refer to the attached Figure 1 and Figure 2 The driving motor 20, the second gear 42 and the potentiometer 50 are respectively installed in the bottom shell motor groove 113, the bottom shell gear groove 112 and the potentiometer groove 115 of the bottom shell 11, wherein the second large gear 421 of the second gear 42 is located below the second small gear 422, and the rotating part 52 of the potentiometer 50 is installed with the potentiometer gear 60.

[0085] Secondly, refer to the attached Figure 3 The first gear 41 is installed in the bottom shell gear groove 412 of the bottom shell 11 in such a way that the first large gear 411 of the first gear 41 is located above the first small gear 412, and the first large gear 411 of the first gear 41 is meshed with the worm 23 of the drive motor 20, and the first small gear 412 is meshed with the second large gear 421 of the second gear 42, so that the first gear 41, the second gear 42 and the worm 23 of the drive motor 20 can be avoided from interfering, and the first gear 41 can be automated. The third gear 43 is installed in the bottom shell gear groove 413 of the bottom shell 11 in such a way that the third large gear 431 of the third gear 43 is located below the third small gear 432, and the third large gear 431 of the third gear 43 is meshed with the second small gear 422 of the second gear 42, so that the second gear 42 and the third gear 43 can be avoided from interfering, and the automated assembly of the third gear 43 can be realized.

[0086] Again, refer to the attached Figure 4 , install the driving shaft 30 in the bottom shell gear groove 112 of the bottom shell 11, wherein the fourth small gear 312 of the driven end 31 of the driving shaft 30 is meshed with the potentiometer gear 60, and the fourth large gear 311 is meshed with the third small gear 432 of the third gear 43, so that interference between the driving shaft 30, the third gear 43 and the potentiometer gear 60 can be avoided, and the automatic assembly of the driving shaft 30 can be realized.

[0087] Fourth, refer to the attached Figure 5 , the top cover 12 is mounted on the bottom shell 11 , wherein the pulling end 32 of the driving shaft 30 extends to the outside of the outer shell 10 through the top cover through hole 121 of the top cover 12 .

[0088] Fifth, refer to the attached Figure 6 The circuit board 70 is disposed in the board compartment 102 of the housing 10 , and the motor pin 21 of the driving motor 20 and the potentiometer pin 53 of the potentiometer 50 are respectively soldered to the circuit board 70 .

[0089] Sixth, refer to the attached Figure 7 The hatch cover 13 is installed on the bottom shell 11 and the top cover 12 so that the hatch cover 13 closes the opening of the board compartment 102 of the outer shell 10 to hide the circuit board 70. At this time, the assembly of the wire pulling motor device is completed.

[0090] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A wire-pulling motor device, characterized in that: include: Drive motor; Transmission gear set; a drive shaft, wherein the drive shaft has opposing driven and pulling ends; A potentiometer, wherein the potentiometer comprises a fixed portion and a rotating portion rotatably disposed on the fixed portion; as well as A shell, wherein the shell includes a bottom shell and a top cover, the bottom shell and the top cover are installed with each other to form a receiving chamber of the shell between the bottom shell and the top cover, the top cover has a top cover through-hole, and the top cover through-hole is connected to the receiving chamber, wherein the drive motor, the transmission gear set and the potentiometer are respectively received in the receiving chamber of the shell, the driven end of the drive shaft is located in the receiving chamber of the shell, the pulling end of the drive shaft extends to the outside of the shell through the top cover through-hole of the top cover, the transmission gear set connects the rotor of the drive motor and the driven end of the drive shaft, the rotating part of the potentiometer is drivably connected to the driven end of the drive shaft, wherein when the drive motor drives the drive shaft to rotate around its own central axis through the transmission gear set, the drive shaft drives the rotating part of the potentiometer to rotate relative to the fixed part.

2. A wire-pulling motor device according to claim 1, wherein the wire-pulling motor device further includes a potentiometer gear, which is installed on the rotating part of the potentiometer, and the potentiometer gear is engaged with the driven end of the drive shaft to allow the drive shaft to drive the rotating part of the potentiometer to rotate relative to the fixed part through the potentiometer gear. 3 . The wire-drawing motor device according to claim 1 , wherein the wire-drawing motor device further comprises a circuit board, and the driving motor and the potentiometer are respectively connected to the circuit board.

4. A wire pulling motor device according to claim 3, wherein the outer shell includes a hatch cover and a board cabin, the board cabin is formed between the bottom shell and the top cover, the circuit board is arranged in the board cabin of the outer shell, the hatch cover is installed on the bottom shell and the top cover, and the hatch cover is used to close the opening of the board cabin of the outer shell.

5. A wire-pulling motor device according to claim 4, wherein the extension direction of the motor pin of the driving motor is consistent with the extension direction of the potentiometer pin of the potentiometer, the extension direction of the motor pin of the driving motor and the extension direction of the circuit board are perpendicular to each other, and the motor pin of the driving motor and the potentiometer pin of the potentiometer are soldered to the circuit board after passing through the pin holes of the circuit board respectively, so as to respectively connect the driving motor and the potentiometer to the circuit board.

6. A wire-pulling motor device according to claim 5, wherein the circuit board has an insertion hole, the bottom shell has an insertion arm, the insertion arm extends to the board compartment of the outer shell, and the free end of the insertion arm has a hook platform, wherein the free end of the insertion arm of the bottom shell allows the hook platform of the insertion arm to hook the circuit board after passing through the insertion hole of the circuit board, so as to set the circuit board in the board compartment of the outer shell.

7. The wire-pulling motor device according to claim 6, wherein the number of the plug-in arms of the bottom shell is two, and one of the plug-in arms is respectively arranged on the opposite sides of the potentiometer pin of the potentiometer. Correspondingly, the circuit board has two plug-in holes, and the positions of the two plug-in holes of the circuit board correspond to the positions of the two plug-in arms of the bottom shell, so that each plug-in arm of the bottom shell is respectively plugged into each plug-in hole of the circuit board.

8. A wire-pulling motor device according to claim 6, wherein a distance that the motor pin of the driving motor protrudes into the board compartment of the outer shell is greater than a distance that the plug-in arm of the bottom shell protrudes into the board compartment of the outer shell, and a distance that the potentiometer pin of the potentiometer protrudes into the board compartment of the outer shell is greater than a distance that the plug-in arm of the bottom shell protrudes into the board compartment of the outer shell.

9. The wire pulling motor device according to claim 4, wherein one end of the hatch cover has a blocking arm, and the other end has a clamping arm, and after the blocking arm of the hatch cover is blocked by the bottom shell or the top cover, the clamping arm of the hatch cover is clamped to the bottom shell or the top cover.

10. The wire-pulling motor device according to claim 9, wherein one end of the hatch cover has two blocking arms, and the other end has two clamping arms, wherein one of the two blocking arms of the hatch cover is blocked by the bottom shell, and the other blocking arm is blocked by the top cover, and one of the two clamping arms of the hatch cover is clamped by the bottom shell, and the other clamping arm is clamped with the top cover.

11. A wire-pulling motor device according to any one of claims 1 to 10, wherein the transmission gear set includes a first gear, a second gear and a third gear, the first gear is respectively meshed with the worm of the drive motor and the second gear, the third gear is respectively meshed with the second gear and the driven end of the drive shaft, the worm is installed on the rotor of the drive motor, wherein the second gear is located at the lower layer so that the second gear is adjacent to the bottom shell, and the first gear and the third gear are located at the upper layer so that the first gear and the third gear are adjacent to the top cover.

12. A wire pulling motor device according to any one of claims 2 to 10, wherein the transmission gear group includes a first gear, a second gear and a third gear, the first gear has a first large gear and a first small gear, the first large gear is located above the first small gear, the second gear has a second large gear and a second small gear, the second large gear is located below the second small gear, the third gear has a third large gear and a third small gear, the third large gear is located below the third small gear, the driven end of the drive shaft has a fourth large gear and a fourth small gear, the fourth large gear is located above the fourth small gear, wherein the first large gear of the first gear is meshed with the worm of the drive motor, the first small gear of the first gear is meshed with the second large gear of the second gear, the second small gear of the second gear is meshed with the third large gear of the third gear, the fourth small gear at the driven end of the drive shaft is meshed with the potentiometer gear, and the fourth large gear at the driven end of the drive shaft is meshed with the third small gear of the third gear.

13. A wire pulling motor device according to any one of claims 1 to 10, wherein the accommodating cavity of the housing is divided into a gear cavity and a motor cavity, the motor cavity having a motor mounting cavity and a worm cavity connected to the motor mounting cavity, the housing having a gear channel, the gear channel connecting the gear cavity and the worm cavity, wherein the drive motor is installed in the motor mounting cavity, the worm of the drive motor is rotatably retained in the worm cavity, the transmission gear set is arranged in the gear cavity, and a portion of a gear in the transmission gear set extends to the worm cavity through the gear channel to engage with the worm of the drive motor, wherein the worm cavity is filled with grease.

14. A wire-pulling motor device according to claim 11, wherein the accommodating cavity of the housing is divided into a gear cavity and a motor cavity, the motor cavity having a motor mounting cavity and a worm cavity connected to the motor mounting cavity, the housing having a gear channel, the gear channel connecting the gear cavity and the worm cavity, wherein the drive motor is installed in the motor mounting cavity, the worm of the drive motor is rotatably retained in the worm cavity, the transmission gear set is arranged in the gear cavity, and a portion of the first gear extends to the worm cavity through the gear channel to engage with the worm of the drive motor, wherein the worm cavity is filled with grease.

15. A wire-pulling motor device according to any one of claims 1 to 10, wherein a first limiting portion is provided on the side of the driving shaft, and a second limiting portion is provided on the edge of the perforation of the top cover, and when the driving shaft rotates around its own central axis, the second limiting portion of the top cover blocks the first limiting portion of the driving shaft to limit the maximum rotation angle of the driving shaft.

16. The wire-pulling motor device according to claim 15, wherein the first limit portion of the driving shaft is a first protrusion protruding from the side of the driving shaft, and the second limit portion of the top cover is a second protrusion protruding from the inner wall of the top cover.

17. A wire-pulling motor device, characterized in that: include: Potentiometer; Drive motor; a drive shaft, wherein the drive shaft has opposing driven and pulling ends; a transmission gear set, wherein the transmission gear set comprises a first gear, a second gear and a third gear; and The outer shell comprises a bottom shell and a top cover, the bottom shell and the top cover are installed with each other to form a receiving chamber of the outer shell between the bottom shell and the top cover, the top cover has a top cover through-hole, the top cover through-hole is connected to the receiving chamber, wherein the driving motor, the transmission gear set and the potentiometer are respectively received in the receiving chamber of the outer shell, the driven end of the driving shaft is located in the receiving chamber of the outer shell, the pulling end of the driving shaft extends to the outside of the outer shell through the top cover through-hole of the top cover, the first gear is respectively engaged with the worm of the driving motor and the second gear, the third gear is respectively engaged with the second gear and the driven end of the driving shaft, wherein the second gear is located in the lower layer so that the second gear is adjacent to the bottom shell, and the first gear and the third gear are located in the upper layer so that the first gear and the third gear are adjacent to the top cover.

18. A wire-pulling motor device according to claim 17, wherein the accommodating cavity of the housing is divided into a gear cavity and a motor cavity, the motor cavity having a motor mounting cavity and a worm cavity connected to the motor mounting cavity, the housing having a gear channel, the gear channel connecting the gear cavity and the worm cavity, wherein the drive motor is installed in the motor mounting cavity, the worm of the drive motor is rotatably retained in the worm cavity, the transmission gear set is arranged in the gear cavity, and a portion of the first gear extends to the worm cavity through the gear channel to engage with the worm of the drive motor, wherein the worm cavity is filled with grease.

19. A wire-pulling motor device according to claim 17 or 18, wherein a first limiting portion is provided on the side of the driving shaft, and a second limiting portion is provided on the edge of the perforation of the top cover, and when the driving shaft rotates around its own central axis, the second limiting portion of the top cover blocks the first limiting portion of the driving shaft to limit the maximum rotation angle of the driving shaft.

20. A wire-pulling motor device according to claim 17 or 18, wherein the assembly order of the first gear, the second gear, the third gear and the drive shaft is: first, assemble the second gear; second, assemble the first gear and the third gear, at which time the first gear is respectively engaged with the worm and the second gear of the drive motor, and the third gear is engaged with the second gear; third, assemble the drive shaft, at which time the drive shaft is engaged with the third gear.

21. A wire-pulling motor device according to claim 20, wherein the first gear has a first large gear and a first small gear, the first large gear is located above the first small gear, the second gear has a second large gear and a second small gear, the second large gear is located below the second small gear, the third gear has a third large gear and a third small gear, and the third large gear is located below the third small gear, wherein the first large gear of the first gear meshes with the worm of the drive motor, the second large gear of the second gear meshes with the first small gear of the first gear, the third large gear of the third gear meshes with the second small gear of the second gear, and the driven end of the drive shaft meshes with the third small gear of the third gear.

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