Waterproof wiper motor

Abstract

The utility model discloses a waterproof wiper motor, including motor body, transmission case, pin subassembly, motor body is fixed on transmission case, and the output end is equipped with worm gear, and transmission case is equipped with containing chamber, and containing chamber is equipped with worm wheel in, and worm wheel links with worm gear, and containing chamber is opened with transmission hole, and transmission hole is equipped with transmission shaft in, and pin subassembly includes input pin group, first circuit board, output pin group, reset pin, input pin group is connected with first circuit board, and input pin group is equipped with elastic input reset contact piece, and first circuit board is equipped with elastic output reset contact piece, and worm wheel is equipped with the electrically conductive sheet for the intercommunication of input reset contact piece and output reset contact piece, and the reset signal of input reset contact piece and output reset contact piece intercommunication will pass through first circuit board processing, and then on transmission to motor body, and reset signal is more stable, and pin and contact piece all adopt copper sheet or other material that can conduct electricity, need not wire and tin solder, and the line is safer.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a waterproof wiper motor. Background Technology

[0002] Windshield wipers are an essential component of automobiles, used to remove dust, leaves, and other deposits from the front and rear windshields. The wiper motor is the driving unit of the entire wiper system, and its position is usually fixed below the windshield of the vehicle.

[0003] Chinese utility model patent publication number "CN214823144U" discloses an integrated waterproof wiper motor, including a motor body, a gearbox assembly, a gearbox cover assembly, and a motor end connector assembly. The gearbox cover assembly includes a cover plate and a worm gear shaft end limit cap. The cover plate and the worm gear shaft end limit cap are joined together without gaps, and the worm gear shaft end limit cap covers the joint between the cover plate and the worm gear shaft. The motor end connector assembly includes a sheath, a pin group, and a wire receiving box. The pin group is assembled in the sheath and connects to the wires in the wire receiving box. A wiring cover is installed on the wire receiving box. The pin group includes a high-speed pin, a low-speed pin, a positive pin, a reset pin, and a negative pin. Both the high-speed pin and the low-speed pin have pin holes, and the inner ends of the high-speed pin and the low-speed pin have arc-shaped opening grooves.

[0004] However, the aforementioned integrated waterproof wiper motor still has the following drawbacks: First, the waterproof wiper motor controls the speed and direction of rotation of the motor body through multiple pins. The positive, negative and reset pins must always be in contact with the conductive plate on the turbine end face. If any pin is disengaged from the conductive plate, the wiper motor will fail and the wiper will not work properly.

[0005] Secondly, the pins of the pin assembly are connected to the motor body through the wires in the wire holder box. The stability of the wire connection is poor. At the same time, the wires are curled and piled up in the wire holder box. The wires are prone to wear and tear, and the connection between the two ends of the wires is prone to poor contact due to shaking, which affects the use of the wipers.

[0006] Therefore, it is necessary to improve upon the aforementioned shortcomings. Utility Model Content

[0007] The purpose of this invention is to provide a waterproof wiper motor with safer circuitry, more compact structure, more enclosed motor, and higher waterproof and noise levels, in order to solve the above-mentioned problems existing in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a waterproof wiper motor, comprising a motor body, a transmission box, and a pin assembly. The motor body is fixed on the transmission box and has a worm gear at the output end. The transmission box has a receiving cavity, and a turbine is provided inside the receiving cavity. The turbine is linked with the worm gear. The receiving cavity has a transmission hole, and a transmission shaft is provided inside the transmission hole. The transmission shaft is linked with the turbine. The pin assembly comprises an input pin group, a first circuit board, an output pin group, and a reset pin. The input pin group is connected to the first circuit board. One end of the output pin group is connected to the first circuit board, and the other end is connected to the motor body. The input pin group has a flexible input reset contact. The first circuit board has a flexible output reset contact. The turbine has a conductive sheet for connecting the input reset contact and the output reset contact.

[0009] By adopting the above technical solution: the power supply is connected to the first circuit board through the input pin group and the reset pin. When the input reset contact and the output reset contact are not connected by the conductive plate, the current is transmitted from the output pin group to the motor body through the first circuit board, controlling the normal operation of the motor body. The turbine is driven to rotate through the worm gear, causing the wiper to rotate. When both the input reset contact and the output reset contact are in contact with the conductive plate, the input pin group transmits an additional current signal to the first circuit board. The first circuit board is equipped with relays, inductors, capacitors, resistors, and diodes, which can receive the current signal and process it before transmitting it to the motor body through the output pin group, controlling the motor body to reset and realizing the rapid reset of the wiper motor. Compared with the traditional wiper motor that uses positive contact, negative contact, and reset contact, the reset signal connected by the input reset contact and the output reset contact is processed by the first circuit board before being transmitted to the motor body. The reset signal is more stable, and the pins and contacts are made of copper or other conductive materials, eliminating the need for wires and soldering, making the circuit safer.

[0010] The aforementioned waterproof wiper motor can be further configured as follows: the transmission box includes a housing, a connecting shell, and an end cover; the connecting shell includes a mounting part and a connecting part; the connecting part is provided with a connecting terminal and a mounting groove; the input pin group and the reset pin are linked through an insulating component; the insulating component passes through the connecting terminal; the mounting groove is provided with a plurality of first positioning posts; the first circuit board is provided with first positioning holes corresponding to the first positioning posts; the connecting part can cover the receiving cavity; the end cover has an opening for the connecting part to pass through; the end cover is located on the side of the connecting shell opposite to the housing; the end cover and the connecting shell are detachably connected to the housing by connecting bolts.

[0011] By adopting the above technical solution: the gearbox housing, connecting shell, and end cover are fastened together by connecting bolts. The opening of the end cover allows the connecting part to pass through smoothly and maintains the overall structure. It can cover and seal the receiving cavity, preventing external pollutants from entering the receiving cavity and affecting the rotation of the turbine and worm gear, effectively improving the waterproof and dustproof performance of the wiper motor. In addition, the input pin group and reset pin are fixed by insulating parts and passed through the connecting terminal. The connecting terminal allows the input pin group and reset pin to be stably connected to the power supply while shielding and protecting the pins, preventing pollutants from corroding the pins and avoiding the risk of electrical short circuits. At the same time, the first circuit board is installed in the mounting groove. The first positioning post in the mounting groove cooperates with the first positioning hole of the first circuit board to ensure that the first circuit board is installed accurately and firmly, preventing the first circuit board from vibrating, and improving the reliability and service life of the motor.

[0012] The aforementioned waterproof wiper motor can be further configured as follows: a plurality of first connecting posts are provided on the end face of the housing, a plurality of second connecting posts are provided on the side of the connecting shell near the end cover, the end cover is provided with a first connecting hole and a second connecting hole, the first connecting posts are inserted into the first connecting hole, the second connecting posts are inserted into the second connecting hole, a sealing protrusion is provided circumferentially on the connecting part that can contact the end cover, and a gasket is also provided between the end cover and the connecting shell.

[0013] By adopting the above technical solution: the first connecting post on the housing cooperates with the first connecting hole of the end cover, and the second connecting post on the connecting shell cooperates with the second connecting hole of the end cover, the housing, connecting shell, and end cover can be quickly positioned and installed and limited, which enhances the overall structural stability and vibration resistance of the transmission box. The sealing protrusion set around the connection part is tightly pressed with the end cover, which can cover the gap between the connection part and the opening. A gasket is set between the end cover and the connecting shell, which improves the connection stability between the end cover and the transmission box and greatly enhances the waterproof and dustproof capabilities of the wiper motor, ensuring that the motor can operate stably in harsh environments.

[0014] The aforementioned waterproof wiper motor can be further configured such that: the housing also includes a motor mounting bracket, the motor mounting bracket is connected to the receiving cavity and has a shaft hole, the motor body is detachably connected to the motor mounting bracket, the worm gear passes through the shaft hole and meshes with the turbine in the receiving cavity, the housing is coaxially provided with a limit hole in the shaft hole, and a limit bolt is threaded in the limit hole, the limit bolt can abut against the end of the worm gear.

[0015] By adopting the above technical solution: the motor body is detachably fixed to the motor mounting bracket, which facilitates installation and maintenance. The worm gear passes through the shaft hole and precisely meshes with the turbine in the receiving cavity, ensuring efficient and stable power transmission. The limiting hole and the limiting bolt threaded to it on the housing can be adjusted by turning to adjust the degree of contact with the end of the worm gear, thereby precisely controlling the axial clearance of the worm gear, effectively preventing axial movement of the worm gear during operation, reducing abnormal wear and operating noise, and improving the stability and service life of the motor.

[0016] The aforementioned waterproof wiper motor can be further configured as follows: the mounting part is provided with a snap-fit ​​component, the end of the reset pin passes through the middle of the snap-fit ​​component, the end of the input reset contact is located inside the snap-fit ​​component and connected to the reset pin, the mounting part is provided with a limiting groove, the output pin group passes through the limiting groove at one end relative to the first circuit board, the side wall of the receiving cavity is connected to the motor mounting bracket and has a connection port, a conductive component passes through the connection port, one end of the conductive component is connected to the output pin group and the other end is connected to the motor body.

[0017] By adopting the above technical solution, the snap-fit ​​component can limit and fix the input reset contact, enabling the input reset contact to be stably connected to the reset pin. At the same time, the mounting part is installed in the limiting groove at the output pin group, and the conductive component passes through the connection port on the side wall of the receiving cavity to connect to the motor body. This allows the output pin assembly to be covered by the transmission box, replacing the easily damaged wire connection method, significantly improving the durability and waterproof sealing performance of the electrical connection, and further improving the conductivity stability and service life of the pin assembly.

[0018] The aforementioned waterproof wiper motor can be further configured such that: the conductive component includes a conductive pin group, one end of which is bent to form a bent portion, and the other end is provided with an abutment block that can abut against the motor body; a V-shaped conductive plate passes through the limiting groove; one end of the conductive plate is provided with a snap-fit ​​hole, and the other end abuts against the bent portion; and the end of the output pin group passes through the snap-fit ​​hole.

[0019] By adopting the above technical solution: the middle part of the conductive plate is inserted into the limiting groove, the bent part can support one side of the conductive plate and the other side can be engaged with the output pin group, so that the conductive plate can be stably installed in the limiting groove. At the same time, the end of the output pin group is directly inserted into the engaging hole of the conductive plate, avoiding the problem of wire wear or poor contact caused by vibration, making the entire current transmission path more stable and reliable.

[0020] The aforementioned waterproof wiper motor can be further configured as follows: the motor body includes a motor cylinder, a motor shaft, a commutator, a second circuit board, and a rotor; the output pin group is electrically connected to the second circuit board; the rotor and the commutator are distributed along the axial direction of the motor shaft; the second circuit board is detachably connected to the transmission box; a carbon brush holder is provided on the second circuit board; carbon brushes are provided inside the carbon brush holder; and the commutator abuts against the carbon brushes.

[0021] By adopting the above technical solution: the second circuit board is installed in the motor mounting bracket on the side of the transmission box. The second circuit board integrates capacitors, inductors, and overheat and overcurrent protectors. It can receive electrical signals output by the output pin group. The output pin group and the second circuit board achieve a stable electrical connection, ensuring that the control signal is efficiently transmitted to the second circuit board. The second circuit board recognizes the electrical signals transmitted by the input pin group and controls the direction of the commutator. The carbon brush holder fixes the carbon brush and maintains constant pressure contact with the commutator, ensuring the continuity and stability of the current input. Furthermore, the motor barrel is detachably connected to the transmission box, which can seal and cover the second circuit board, rotor, commutator, etc., facilitating the installation and maintenance of the motor body and effectively isolating the motor body from the influence of external moisture and dust.

[0022] The aforementioned waterproof wiper motor can be further configured as follows: a mounting cylinder extends outward from the transmission hole of the transmission box, the transmission shaft passes through the mounting cylinder, a support cylinder is sleeved on the transmission shaft, a positioning boss extends from the opening of the mounting cylinder relative to the turbine end towards the center, one end of the support cylinder abuts against the turbine and the other end abuts against the positioning boss, an annular limiting groove is opened on the side of the transmission shaft relative to the positioning boss and the support cylinder, the limiting groove is connected to an elastic clamp, and a washer is provided between the clamp and the mounting cylinder.

[0023] By adopting the above technical solution: the mounting cylinder provides stable radial support for the drive shaft, and the support cylinder sleeved on the drive shaft abuts against the turbine and positioning boss at both ends, effectively limiting the axial movement of the drive shaft, ensuring the smoothness of power transmission and reducing operating noise. The annular limiting groove at the end of the drive shaft cooperates with the elastic clamp to firmly lock the drive shaft and prevent it from coming out of the mounting cylinder. The washer set between the clamp and the mounting cylinder can reduce the wear of the clamp when it rotates relative to the mounting cylinder, and can shield the gap between the drive shaft and the transmission hole, effectively preventing water vapor and pollutants from entering the transmission box, improving the waterproof rating of the entire wiper motor and extending the service life of the wiper motor.

[0024] The aforementioned waterproof wiper motor can be further configured as follows: a number of mounting ears extend outward from the side of the transmission box, the mounting ears are provided with a first mounting post, a number of second mounting posts are provided below the transmission box, and a number of reinforcing ribs extend outward from the circumference of the mounting cylinder.

[0025] By adopting the above technical solution, the multiple mounting ears extending from the side of the transmission box and the first mounting post thereon, together with the second mounting post set below the transmission box, constitute a multi-point mounting and fixing system. This allows the motor to adapt to the installation space of different vehicle models with higher stability and vibration resistance. The several reinforcing ribs extending circumferentially from the mounting cylinder significantly enhance the structural rigidity and impact resistance of the transmission shaft output area, effectively disperse the stress during operation, prevent the box from deforming, and improve the reliability of the wiper motor.

[0026] The beneficial effects of this utility model are as follows: First, the pin assembly is distributed within the connecting part of the connecting shell. The connecting shell can protect the pin assembly, reduce the corrosion of the pin assembly by the external environment, and improve the stability and service life of the pin assembly. Compared with the traditional method of using three contact pieces, when the input reset contact piece on the reset pin and the output reset pin on the first circuit board are both in contact with the conductive piece, the reset electrical signal will be transmitted to the first circuit board. Then, the first circuit board will transmit the signal to the motor body through the output pin group, control the rotation of the motor body, and realize the wiper reset. At the same time, the output pin group is connected to the motor body. The pin assembly uses copper sheet as the connector, eliminating the need to set wires or solder inside the wiper motor. Furthermore, the conductive piece only needs to be distributed in a small area on the turbine, eliminating the need to set an annular conductive piece on the turbine, resulting in better circuit stability and safety.

[0027] Secondly, by setting a connecting shell and an end cap above the receiving cavity of the transmission box, and placing the pin assembly inside the connecting shell, the connecting shell shields the receiving cavity through the mounting part, while the end cap further shields the gap between the connecting part and the receiving cavity. A sealing protrusion that contacts the end cap is set around the connecting part to further cover the connection gap. Compared with the traditional method of using a single-layer end cap connection, the connecting shell and end cap can provide multiple seals for the box, significantly improving the waterproof performance of the wiper motor. In addition, the opening on the end cap allows the connecting part of the connecting shell to pass through the end cap, making the overall structure of the transmission box more compact and closed, effectively reducing the operating noise of the wiper motor.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the waterproof wiper motor of this utility model; Figure 2 This is an exploded schematic diagram of the waterproof wiper motor of this utility model; Figure 3 For the present utility model Figure 4 This is a schematic diagram of the structure of the box body of this utility model; Figure 5 This is a schematic diagram of the box body from another perspective; Figure 6 This is a schematic diagram of the connecting shell of this utility model; Figure 7 This is a schematic diagram of the end cap structure of this utility model; Figure 8 This is a schematic diagram showing the disassembled pin assembly of this utility model; Figure 9This is a disassembled schematic diagram of the motor body of this utility model; Figure 10 This is a schematic diagram of the structure of the transmission shaft of this utility model; Label annotations: Motor body 1, worm gear 11, motor cylinder 12, commutator 13, second circuit board 14, carbon brush holder 141, rotor 15. Transmission box 2, receiving cavity 21, transmission hole 211, box body 22, first connecting post 221, motor mounting bracket 222, shaft hole 2221, limiting hole 223, limiting bolt 2231, connecting port 224, connecting shell 23, mounting part 231, snap-fit ​​part 2311, limiting groove 2312, connecting part 232, connecting terminal 2321, mounting groove 2322, first positioning post 2323, second connecting post 233, sealing protrusion 234, end cover 24, opening 241, first connecting hole 242, second connecting hole 243, connecting bolt 25, gasket 26, mounting cylinder 27, positioning boss 271, reinforcing rib 272, mounting ear 28, first mounting post 281, second mounting post 29. Pin assembly 3, input pin group 31, first circuit board 32, first positioning hole 321, output pin group 33, reset pin 34, input reset contact 35, output reset contact 36, insulating component 37, conductive component 38, conductive pin group 381, bending part 3811, abutment block 3812, V-shaped conductive plate 382, ​​snap-fit ​​hole 3821. 4. Turbine, 41. Conductive plate, 5. Drive shaft, 51. Support cylinder, 52. Limiting groove, 53. Clamp, 54. Washer. Detailed Implementation

[0030] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] A waterproof wiper motor, such as Figures 1 to 10As shown, the device includes a motor body 1, a transmission housing 2, and a pin assembly 3. The motor body 1 is fixed on the transmission housing 2 and has a worm gear 11 at its output end. The transmission housing 2 has a receiving cavity 21, within which a turbine 4 is installed. The turbine 4 is linked to the worm gear 11. The receiving cavity 21 has a transmission hole 211, within which a transmission shaft 5 is installed. The transmission shaft 5 is linked to the turbine 4. The pin assembly 3 includes an input pin group 31, a first circuit board 32, an output pin group 33, and a reset pin 34. The input pin group 31 is connected to the first circuit board 32. One end of the output pin group 33 is connected to the first circuit board 32 and the other end is connected to the motor body 1. The input pin group 31 is provided with a flexible input reset contact 35. The first circuit board 32 is provided with a flexible output reset contact 36. The turbine 4 is provided with a conductive sheet 41 for connecting the input reset contact 35 and the output reset contact 36. The first circuit board 32 is provided with a relay, inductor, capacitor, resistor and diode, which can receive current signals and process the current signals and transmit them to the motor body 1 through the output pin group 33 to control the motor body 1 to reset.

[0032] like Figures 2 to 7 As shown, the transmission box 2 includes a box body 22, a connecting shell 23, and an end cover 24. The connecting shell 23 includes a mounting part 231 and a connecting part 232. The connecting part 232 is provided with a connecting terminal 2321 and a mounting groove 2322. The input pin group 31 and the reset pin 34 are linked by an insulating member 37. The insulating member 37 passes through the connecting terminal 2321. The mounting groove 2322 is provided with a plurality of first positioning posts 2323. The first circuit board 32 is provided with first positioning holes 321 corresponding to the first positioning posts 2323. The connecting part 232 can cover the receiving cavity 21. The end cover 24 has an opening 241 for the connecting part 232 to pass through. The end cover 24 is located on the side of the connecting shell 23 opposite to the box body 22. The end cover 24 and the connecting shell 23 are detachably connected to the box body 22 by connecting bolts 25. The housing 22, connecting shell 23, and end cover 24 of the transmission box 2 are fastened together by connecting bolts 25. The opening 241 of the end cover 24 allows the connecting part 232 to pass through smoothly and maintain the overall structure. It can cover and seal the receiving cavity 21 to prevent external pollutants from entering the receiving cavity 21 and affecting the rotation of the turbine 4 and the worm gear 11, effectively improving the waterproof and dustproof performance of the wiper motor. The input pin group 31 and the reset pin 34 are fixed by the insulating part 37 and pass through the connecting terminal 2321. The connecting terminal 2321 allows the input pin group 31 and the reset pin 34 to be stably connected to the power supply while shielding and protecting the pins to prevent pollutants from corroding the pins and avoid the risk of electrical short circuit. At the same time, the first circuit board 32 is installed in the mounting groove 2322. The first positioning post 2323 in the mounting groove 2322 cooperates with the first positioning hole 321 of the first circuit board 32 to ensure that the first circuit board 32 is installed accurately and firmly, prevent the first circuit board 32 from vibrating, and improve the reliability and service life of the motor.

[0033] The housing 22 includes a motor mounting bracket 222. The motor mounting bracket 222 is connected to the receiving cavity 21 and has a shaft hole 2221. The motor body 1 is detachably connected to the motor mounting bracket 222. The worm gear 11 passes through the shaft hole 2221 and meshes with the turbine 4 in the receiving cavity 21. The housing 22 has a limit hole 223 coaxially formed in the shaft hole 2221. A limit bolt 2231 is threadedly connected in the limit hole 223. The limit bolt 2231 can abut against the end of the worm gear 11. The motor body 1 is detachably fixed to the motor mounting bracket 222 for easy installation and maintenance. The worm gear 11 passes through the shaft hole 2221 and precisely meshes with the turbine 4 in the receiving cavity 21, ensuring efficient and stable power transmission. The limiting hole 223 and the limiting bolt 2231 threadedly connected to it on the housing 22 can be adjusted by turning to adjust the degree of contact with the end of the worm gear 11, thereby precisely controlling the axial clearance of the worm gear 11, effectively preventing axial movement of the worm gear 11 during operation, reducing abnormal wear and operating noise, and improving the stability and service life of the motor.

[0034] The end face of the housing 22 is provided with a number of first connecting posts 221, and the side of the connecting shell 23 near the end cover 24 is provided with a number of second connecting posts 233. The end cover 24 is provided with a first connecting hole 242 and a second connecting hole 243. The first connecting posts 221 pass through the first connecting hole 242, and the second connecting posts 233 pass through the second connecting hole 243. The connecting part 232 is provided with a sealing protrusion 234 that can contact the end cover 24 in the circumferential direction. A gasket 26 is also provided between the end cover 24 and the connecting shell 23. The first connecting post 221 on the housing 22 mates with the first connecting hole 242 on the end cover 24, and the second connecting post 233 on the connecting shell 23 mates with the second connecting hole 243 on the end cover 24. This allows for quick positioning and installation of the housing 22, the connecting shell 23, and the end cover 24, enhancing the overall structural stability and vibration resistance of the transmission box 2. The sealing protrusion 234 circumferentially provided on the connecting part 232 is tightly pressed against the end cover 24, covering the gap between the connecting part 232 and the opening 241. A gasket 26 is provided between the end cover 24 and the connecting shell 23, improving the connection stability between the end cover 24 and the transmission box 2 while greatly enhancing the waterproof and dustproof capabilities of the wiper motor, ensuring stable operation of the motor even in harsh environments.

[0035] The mounting part 231 is provided with a snap-fit ​​component 2311. The end of the reset pin 34 passes through the middle of the snap-fit ​​component 2311. The end of the input reset contact 35 is located inside the snap-fit ​​component 2311 and connected to the reset pin 34. The mounting part 231 is provided with a limiting groove 2312. One end of the output pin group 33 passes through the limiting groove 2312 relative to the first circuit board 32. The side wall of the receiving cavity 21 is connected to the motor mounting bracket 222 and has a connection port 224. A conductive component 38 passes through the connection port 224. One end of the conductive component 38 is connected to the output pin group 33 and the other end is connected to the motor body 1. The snap-fit ​​component 2311 can limit and fix the input reset contact 35, so that the input reset contact 35 can be stably connected to the reset pin 34. At the same time, the mounting part 231 has a limiting groove 2312 at the output pin group 33, and the conductive component 38 passes through the connection port 224 on the side wall of the receiving cavity 21 to connect to the motor body 1. This makes the output pin group 33 covered by the transmission box 2, replacing the easily damaged wire connection method, significantly improving the durability and waterproof sealing performance of the electrical connection, and further improving the conductivity stability and service life of the pin assembly 3.

[0036] like Figure 2 , Figure 3 , Figure 8 As shown, the conductive component 38 includes a conductive pin group 381. One end of the conductive pin group 381 is bent to form a bent portion 3811, and the other end is provided with an abutment block 3812 that can abut against the motor body 1. A V-shaped conductive plate 382 passes through the limiting groove 2312. One end of the V-shaped conductive plate 382 has a snap-fit ​​hole 3821, and the other end abuts against the bent portion 3811. The end of the output pin group 33 passes through the snap-fit ​​hole 3821. The middle part of the V-shaped conductive plate 382 passes through the limiting groove 2312. The bent portion 3811 can support one side of the V-shaped conductive plate 382 and snap-fit ​​the other side with the output pin group 33, so that the V-shaped conductive plate 382 can be stably installed in the limiting groove 2312. At the same time, the end of the output pin group 33 directly passes through the snap-fit ​​hole 3821 of the V-shaped conductive plate 382, ​​avoiding wire wear or poor contact caused by vibration, making the entire current transmission path more stable and reliable.

[0037] like Figure 2 , Figure 3 , Figure 9As shown, the motor body 1 includes a motor barrel 12, a commutator 13, a second circuit board 14, and a rotor 15. The output pin group 33 is electrically connected to the second circuit board 14. The rotor 15 and the commutator 13 are distributed along the axial direction of the worm gear 11. The second circuit board 14 is detachably connected to the transmission box 2. A carbon brush holder 141 is provided on the second circuit board 14, and a carbon brush is provided inside the carbon brush holder 141. The commutator 13 abuts against the carbon brush. The second circuit board 14 is installed in the motor mounting bracket 222 on the side of the transmission box 2. The second circuit board 14 integrates capacitors, inductors and overheat and overcurrent protectors. It can receive electrical signals output by the output pin group 33. The output pin group 33 and the second circuit board 14 are stably connected to ensure that the control signal is efficiently transmitted to the second circuit board 14. The second circuit board 14 recognizes the electrical signals transmitted by the input pin group 31 and controls the direction of the commutator 13. The carbon brush holder 141 fixes the carbon brush and maintains constant pressure contact with the commutator 13, ensuring the continuity and stability of the current input. The motor barrel 12 is detachably connected to the transmission box 2, which can seal and cover the second circuit board 14, rotor 15, commutator 13, etc., which facilitates the installation and maintenance of the motor body 1 and effectively isolates the influence of external moisture and dust on the motor body 1.

[0038] like Figure 5 , Figure 10 As shown, the transmission box 2 has an installation cylinder 27 extending outward from the transmission hole 211. The transmission shaft 5 passes through the installation cylinder 27 and is fitted with a support cylinder 51. The opening of the installation cylinder 27 at one end relative to the turbine 4 extends towards the center with a positioning boss 271. One end of the support cylinder 51 abuts against the turbine 4 and the other end abuts against the positioning boss 271. The transmission shaft 5 has an annular limiting groove 52 on the side of the positioning boss 271 relative to the support cylinder 51. The limiting groove 52 is connected to an elastic clamp 53. A washer 54 is provided between the clamp 53 and the installation cylinder 27. Mounting cylinder 27 provides stable radial support for drive shaft 5. Support cylinder 51, sleeved on drive shaft 5, abuts against turbine 4 and positioning boss 271 at both ends, effectively limiting axial movement of drive shaft 5, ensuring smooth power transmission and reducing operating noise. The annular limiting groove 52 at the end of drive shaft 5 cooperates with elastic clamp 53 to firmly lock drive shaft 5, preventing it from coming out of mounting cylinder 27. The washer 54 between clamp 53 and mounting cylinder 27 reduces wear when clamp 53 rotates relative to mounting cylinder 27 and can shield the gap between drive shaft 5 and transmission hole 211, effectively preventing water vapor and pollutants from entering the transmission box 2, improving the waterproof rating of the entire wiper motor and extending the service life of wiper motor.

[0039] The transmission housing 2 has several mounting ears 28 extending outward from its side. Each mounting ear 28 has a first mounting post 281. The transmission housing 2 has several second mounting posts 29 located below it. The mounting cylinder 27 has several reinforcing ribs 272 extending outward circumferentially. The multiple mounting ears 28 extending outward from the side of the transmission housing 2 and the first mounting posts 281 thereon, together with the second mounting posts 29 located below the transmission housing 2, constitute a multi-point mounting and fixing system. This allows the motor to adapt to the installation space of different vehicle models with higher stability and vibration resistance. The reinforcing ribs 272 extending outward circumferentially from the mounting cylinder 27 significantly enhance the structural rigidity and impact resistance of the output area of ​​the drive shaft 5, effectively disperse the stress during operation, prevent deformation of the housing 22, and improve the reliability of the wiper motor.

[0040] The working principle of this embodiment is as follows: The second circuit board 14 is mounted on the motor mounting bracket 222 by fixing bolts. At the same time, the worm gear 11 passes through the second circuit board 14, the commutator 13 and the rotor 15 are mounted on the worm gear 11, the carbon brushes in the carbon brush holder 141 contact the commutator 13, and then the motor barrel 12 is connected to the motor mounting bracket 222, and the motor body 1 is mounted on the transmission box 2.

[0041] The support cylinder 51 is then inserted onto the drive shaft 5, and the drive shaft 5 is inserted through the drive hole 211. The turbine 4 and the drive shaft 5 are installed synchronously in the receiving cavity 21 and mesh with the worm gear 11. At this time, one end of the support cylinder 51 abuts against the turbine 4, and the other end abuts against the end face of the positioning boss 271 of the mounting cylinder 27. Then, the washer 54 is inserted into the drive shaft 5, the clamp 53 is inserted into the limiting groove 52, and the conductive sheet 41 is installed on the end face of the turbine 4.

[0042] Simultaneously, the input pin group 31 and the reset pin 34 are fixed at intervals by insulating parts 37. One end of the input pin group 31 passes through the connecting terminal 2321, and the other end is located in the mounting groove 2322. One end of the reset pin 34 passes through the connecting terminal 2321, and the other end passes through the mounting part 231 and is located in the snap-fit ​​part 2311. The output pin group 33 is connected to the first circuit board 32. The first positioning hole 321 of the first circuit board 32 corresponds to the first positioning post 2323 in the mounting groove 2322. The first circuit board 32 is installed in the mounting groove 2322, and the input pins are simultaneously... Pin group 31 and output pin group 33 are both connected to the first circuit board 32. Then, the input reset contact 35 is installed into the snap-fit ​​piece 2311 and snap-fitted with the reset pin 34. The output reset contact 36 is inserted into the first circuit board 32. One end of the conductive pin group 381 is located at the limiting groove 2312, and the other end passes through the connection port 224 and snap-fitted with the second circuit board 14. The abutment block 3812 abuts against the end face of the second circuit board 14. The V-shaped conductive plate 382 is inserted into the limiting groove 2312 and snap-fitted with the output pin group 33 through the snap-fit ​​hole 3821.

[0043] Then, the mounting part 231 of the connecting shell 23 is covered in the receiving cavity 21. The V-shaped conductive plate 382 abuts against the conductive pin group 381 on the side opposite to the output pin group 33. The end cover 24 passes through the connecting part 232 through the opening 241. The first connecting post 221 is inserted into the first connecting hole 242, and the second connecting post 233 is inserted into the second connecting hole 243. Then, the connecting bolt 25 is inserted into the end cover 24, the connecting shell 23 and the housing 22 to complete the assembly of the wiper motor.

[0044] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A waterproof wiper motor, comprising a motor body, a transmission box, and a pin assembly, wherein the motor body is fixed on the transmission box and has a worm gear at its output end; the transmission box has a receiving cavity, and a turbine is disposed within the receiving cavity; the turbine is linked to the worm gear; the receiving cavity has a transmission hole, and a transmission shaft is disposed within the transmission hole; the transmission shaft is linked to the turbine, characterized in that: The pin assembly includes an input pin group, a first circuit board, an output pin group, and a reset pin. The input pin group is connected to the first circuit board, and one end of the output pin group is connected to the first circuit board and the other end is connected to the motor body. The input pin group is provided with a flexible input reset contact, the first circuit board is provided with a flexible output reset contact, and the turbine is provided with a conductive sheet for connecting the input reset contact and the output reset contact.

2. A waterproof wiper motor according to claim 1, characterized in that: The transmission box includes a housing, a connecting shell, and an end cover. The connecting shell includes a mounting part and a connecting part. The connecting part is provided with a connecting terminal and a mounting groove. The input pin group and the reset pin are linked through an insulating component. The insulating component passes through the connecting terminal. The mounting groove is provided with a plurality of first positioning posts. The circuit board is provided with first positioning holes corresponding to the first positioning posts. The connecting part can cover the receiving cavity. The end cover has an opening for the connecting part to pass through. The end cover is located on the side of the connecting shell opposite to the housing. The end cover and the connecting shell are detachably connected to the housing by connecting bolts.

3. A waterproof wiper motor according to claim 2, characterized in that: The end face of the housing is provided with a plurality of first connecting posts, and the connecting shell is provided with a plurality of second connecting posts on the side near the end cover. The end cover is provided with a first connecting hole and a second connecting hole. The first connecting posts pass through the first connecting holes, and the second connecting posts pass through the second connecting holes. The connecting part is provided with a sealing protrusion that can contact the end cover in the circumferential direction. A gasket is also provided between the end cover and the connecting shell.

4. A waterproof wiper motor according to claim 3, characterized in that: The housing also includes a motor mounting bracket, which has a shaft hole connected to the receiving cavity. The motor body is detachably connected to the motor mounting bracket. The worm gear passes through the shaft hole and meshes with the turbine in the receiving cavity. The housing has a limit hole coaxially formed with the shaft hole. A limit bolt is threaded into the limit hole and can abut against the end of the worm gear.

5. A waterproof wiper motor according to claim 4, characterized in that: The mounting part is provided with a snap-fit ​​component. The end of the reset pin passes through the middle of the snap-fit ​​component. The end of the input reset contact is located inside the snap-fit ​​component and connected to the reset pin. The mounting part is provided with a limiting groove. The end of the output pin group relative to the first circuit board passes through the limiting groove. The side wall of the receiving cavity is connected to the motor mounting bracket and has a connection port. A conductive component passes through the connection port. One end of the conductive component is connected to the output pin group and the other end is connected to the motor body.

6. A waterproof wiper motor according to claim 5, characterized in that: The conductive component includes a conductive pin group, one end of which is bent to form a bent portion and the other end is provided with an abutment block that can abut against the motor body. A V-shaped conductive plate passes through the limiting groove. One end of the conductive plate is provided with a snap-fit ​​hole and the other end abuts against the bent portion. The end of the output pin group passes through the snap-fit ​​hole.

7. A waterproof wiper motor according to any one of claims 1 to 6, characterized in that: The motor body includes a motor cylinder, a motor shaft, a commutator, a second circuit board, and a rotor. The output pin group is electrically connected to the second circuit board. The rotor and the commutator are distributed along the axial direction of the motor shaft. The second circuit board is detachably connected to the transmission box. A carbon brush holder is provided on the second circuit board, and carbon brushes are provided inside the carbon brush holder. The commutator abuts against the carbon brushes.

8. A waterproof wiper motor according to claim 7, characterized in that: The transmission box has an installation cylinder extending outward from the transmission hole. The transmission shaft passes through the installation cylinder and is fitted with a support cylinder. The installation cylinder has a positioning boss extending from the opening at one end opposite to the turbine. One end of the support cylinder abuts against the turbine and the other end abuts against the positioning boss. The transmission shaft has an annular limiting groove on the side of the positioning boss opposite to the support cylinder. The limiting groove is connected to an elastic clamp, and a washer is provided between the clamp and the installation cylinder.

9. A waterproof wiper motor according to claim 8, characterized in that: The transmission box has several mounting ears extending outward from its side, each mounting ear having a first mounting post, and several second mounting posts being provided below the transmission box. The mounting cylinder has several reinforcing ribs extending outward in the circumferential direction.

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