A wiper motor

Abstract

This invention relates to a windshield wiper motor, comprising a motor housing and a motor shaft disposed within the motor housing. A reduction gearbox is disposed at one end of the motor housing, the reduction gearbox including a gear mechanism driven by the motor shaft. An output shaft is disposed at the power output end of the gear mechanism, the output shaft being used to drive the windshield wiper arm to reciprocate. One end of the output shaft extends out of the housing of the reduction gearbox, this end being an outer extension end. The output shaft is a hollow shaft. A spray bar is disposed on the outer extension end of the output shaft, the spray bar including a nozzle and a connecting pipe. The nozzle is fixed to one end of the connecting pipe, and the nozzle is fixedly connected to the end of the outer extension end of the output shaft, so that the nozzle rotates synchronously with the output shaft. The connecting pipe of the spray bar is located in the shaft hole of the output shaft. A water supply pipe is inserted into the shaft hole of the output shaft from the other end of the output shaft, and is sealed to the connecting pipe, so that the connecting pipe and the water supply pipe are connected.

Description

Technical Field

[0001] This invention relates to the technical field of automotive windshield wipers, and particularly to a windshield wiper motor. Background Technology

[0002] Car windshield wipers are devices used to remove raindrops and dust adhering to the windshield of a vehicle, improving the driver's visibility and increasing driving safety. When there is no rain on the windshield but cleaning it with wipers is still necessary, it is usually necessary to spray water on the windshield to reduce friction during wiping, reduce noise, and enhance cleaning effectiveness.

[0003] Currently, windshield wiper arms are driven by wiper motors to reciprocate. The washer fluid system is typically driven by a motor located at the bottom of the windshield. This motor rotates the blades via a motor shaft, causing liquid to flow from the outlet pipe into the mains, and then through the nozzle for spraying. The washer fluid system is independent of the wiper system, which increases the complexity of the car's interior layout. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a wiper motor with a water spray structure, which improves the integration of automotive components and facilitates the layout design of automotive space.

[0005] The technical solution of the present invention is as follows: a wiper motor, comprising a motor housing and a motor shaft disposed within the motor housing, a reduction gearbox being disposed at one end of the motor housing, the reduction gearbox including a gear mechanism driven by the motor shaft, an output shaft being disposed at the power output end of the gear mechanism, the output shaft being used to drive the wiper arm of a car to reciprocate, one end of the output shaft extending out of the housing of the reduction gearbox, this end being an outer extension end, the output shaft being a hollow shaft; a spray bar being disposed on the outer extension end of the output shaft, the spray bar including a nozzle and a connecting pipe, the nozzle being fixed to one end of the connecting pipe, and the nozzle being fixedly connected to the end of the outer extension end of the output shaft, so that the nozzle and the output shaft rotate synchronously, the connecting pipe of the spray bar being located in the shaft hole of the output shaft, and a water supply pipe being inserted into the shaft hole of the output shaft from the other end of the output shaft, and being sealed and connected to the connecting pipe, so that the connecting pipe and the water supply pipe are connected.

[0006] Furthermore, the nozzle is provided with a water spray nozzle, and the axis of the water spray nozzle is perpendicular to the axis of the output shaft.

[0007] Furthermore, the gearbox housing is provided with a support portion for the output shaft. The support portion extends away from the gearbox housing and has a through hole. The output shaft extends out of the gearbox housing from the through hole and slides in the through hole of the support portion, and is sealed with the support portion by a sealing ring.

[0008] Furthermore, the other end of the connecting pipe is inserted into the water supply pipe and is rotatably fitted into the water supply pipe. A sealing ring is provided between the other end of the connecting pipe and the water supply pipe to form a sealed connection between the water supply pipe and the connecting pipe.

[0009] Furthermore, the nozzle and the end of the output shaft are fixedly connected by an interference fit.

[0010] Furthermore, an annular groove is provided at one end of the nozzle near the output shaft, and the end of the outer extension of the output shaft is interference-fitted in the annular groove.

[0011] Furthermore, the water supply pipe is fixedly connected to the housing of the gearbox.

[0012] Furthermore, a connector is provided at one end of the water supply pipe. The connector is located outside the housing of the gearbox and is used to connect to a water source. The connector is fixedly connected to the housing of the gearbox.

[0013] Furthermore, the connector has at least one protruding clip, and a snap-fit ​​seat is fixedly installed on the housing of the gearbox. Two limiting protrusions are provided on the end face of the snap-fit ​​seat. The clip on the connector is located between the two limiting protrusions of the snap-fit ​​seat to form a circumferential fixation of the water supply pipe. The clip on the connector abuts against the end face of the snap-fit ​​seat to form an axial fixation of the water supply pipe.

[0014] Furthermore, the output shaft has a stepped bore, the connecting pipe fits into the small diameter section of the stepped bore, and the water supply pipe fits into the large diameter section of the stepped bore.

[0015] The above technical solution includes a motor housing and a motor shaft housed within the motor housing. A reduction gearbox is located at one end of the motor housing, and the reduction gearbox includes a gear mechanism driven by the motor shaft. An output shaft is located at the power output end of the gear mechanism, and the output shaft drives the windshield wiper arm to reciprocate. One end of the output shaft extends out of the housing of the reduction gearbox; this end is the outer extension end. The output shaft is a hollow shaft. A spray bar is located on the outer extension end of the output shaft. The spray bar includes a nozzle and a connecting pipe. The nozzle is fixed to one end of the connecting pipe and is fixedly connected to the end of the outer extension end of the output shaft, allowing the nozzle to rotate synchronously with the output shaft. The connecting pipe of the spray bar is located within the shaft hole of the output shaft. A water supply pipe is inserted into the shaft hole of the output shaft from the other end of the output shaft and is sealed to the connecting pipe, connecting the connecting pipe to the water supply pipe. This water spray structure on the windshield wiper motor improves the integration of automotive components and facilitates the layout design of the automotive space. Furthermore, the spray nozzles can rotate synchronously with the output shaft, allowing the nozzles to effectively spray water from any position on the wiper arm connected to the output shaft. This reduces friction between the wiper arm and the windshield, resulting in better wiping performance and saving water consumption. In addition, the connecting pipes for the spray bar and the water supply pipes are both located within the shaft hole of the output shaft, further improving the integration of automotive components and facilitating better layout design within the vehicle. The water supply pipes are also more robust and reliable, protected by the output shaft, reducing the failure rate.

[0016] Furthermore, the nozzle is provided with a spray nozzle, the axis of which is perpendicular to the axis of the output shaft. This allows the nozzle to spray water along or near the extension direction of the wiper arm, resulting in more precise water spraying.

[0017] Furthermore, the gearbox housing is provided with a support portion for the output shaft. The support portion extends away from the gearbox housing and has a through hole. The output shaft extends out of the gearbox housing through the through hole and slides within the through hole of the support portion, sealed with a sealing ring. The support portion's support of the output shaft ensures smoother and more reliable rotation. A bearing can be installed between the support portion and the output shaft to reduce friction during rotation. The sealing ring between the output shaft and the support portion prevents water sprayed from the nozzle from entering the gearbox housing and prevents water from entering the motor.

[0018] Furthermore, the other end of the connecting pipe is inserted into the water supply pipe and rotatably fitted within the water supply pipe. A sealing ring is provided between the other end of the connecting pipe and the water supply pipe, forming a sealed connection between the water supply pipe and the connecting pipe. This achieves pipe connectivity between the connecting pipe and the water supply pipe, and the circumferential rotation of the connecting pipe is not restricted by the water supply pipe, allowing the nozzle to rotate together with the output shaft. The sealing ring increases the sealing performance of the connection between the connecting pipe and the water supply pipe, preventing leakage at the connection point.

[0019] Furthermore, the nozzle and the end of the output shaft are fixedly connected by an interference fit. The interference fit connection method is simple and quick.

[0020] Furthermore, an annular groove is provided at one end of the nozzle near the output shaft, and the end of the outer extension of the output shaft is interference-fitted into the annular groove. The entire end of the output shaft is inserted into the annular groove and interference-fitted with the annular groove, which can increase the firmness of the connection between the nozzle and the output shaft.

[0021] Furthermore, the water supply pipe is fixedly connected to the housing of the gearbox. Directly fixing the water supply pipe to the gearbox housing facilitates assembly, and fixing the water supply pipe to the gearbox housing prevents circumferential rotation of the water supply pipe, making the overall structure more stable and controllable.

[0022] Furthermore, a connector is provided at one end of the water supply pipe. The connector is located outside the housing of the gearbox and is used to connect to a water source. The connector is fixedly connected to the housing of the gearbox. The connector has at least one protruding clip. A snap-fit ​​seat is fixedly provided on the housing of the gearbox. Two limiting protrusions are provided on the end face of the snap-fit ​​seat. The clip on the connector is located between the two limiting protrusions of the snap-fit ​​seat, forming a circumferential fixation of the water supply pipe. The clip on the connector abuts against the end face of the snap-fit ​​seat, forming an axial positioning of the water supply pipe. The cooperation between the connector and the snap-fit ​​seat forms a fixed connection between the water supply pipe and the gearbox housing. The assembly of the water supply pipe is simple and quick, and the connection is stable and reliable.

[0023] Furthermore, the output shaft has a stepped bore, with the connecting pipe fitted into the smaller diameter section of the stepped bore and the water supply pipe fitted into the larger diameter section of the stepped bore. This design, with the connecting pipe and water supply pipe positioned within the output shaft bore, effectively reduces circumferential movement of the two pipes.

[0024] The wiper motor in this invention incorporates a water spray structure, improving the integration of automotive components and facilitating efficient interior space design. Furthermore, the water spray effect is excellent, resulting in superior wiper cleaning and reduced water consumption. Simultaneously, the water supply pipes are more robust and reliable, protected by the output shaft, thus lowering the failure rate.

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the wiper motor structure;

[0027] Figure 2 A schematic diagram showing the structure of the output shaft in conjunction with the spray bar and water pipe;

[0028] Figure 3 for Figure 2 AA sectional view.

[0029] In the attached diagram, 1 is the motor housing, 2 is the gearbox, 3 is the output shaft, 3-1 is the shaft hole, 4 is the spray bar, 4-1 is the nozzle, 4-2 is the connecting pipe, 5 is the connector, 6 is the snap-fit ​​seat, and 7 is the water supply pipe. Detailed Implementation

[0030] See Figures 1 to 3 A windshield wiper motor includes a motor housing 1 and a motor shaft disposed within the motor housing 1. A reduction gearbox 2 is disposed at one end of the motor housing 1, and the motor housing 1 and the housing of the reduction gearbox 2 are fixedly connected. The reduction gearbox 2 includes a gear mechanism driven by the motor shaft. An output shaft 3 is disposed at the power output end of the gear mechanism, and the output shaft 3 is used to drive the windshield wiper arm to reciprocate. One end of the output shaft 3 extends out of the housing of the reduction gearbox 2, and this end is an outer extension end. The output shaft 3 is a hollow shaft. A spray bar 4 is disposed on the outer extension end of the output shaft 3. The spray bar 4 includes a nozzle 4-1 and a connecting pipe 4-2. The nozzle 4-1 is fixed to one end of the connecting pipe 4-2, and the nozzle 4-1 and the connecting pipe 4-2 can be an integral structure. The nozzle 4-1 is fixedly connected to the end of the outer extension end of the output shaft 3, so that the nozzle 4-1 and the output shaft 3 rotate synchronously. Furthermore, the nozzle 4-1 and the end of the outer extension of the output shaft 3 are fixedly connected by an interference fit, which is simple and quick. Optionally, an annular groove is provided at the end of the nozzle 4-1 near the output shaft 3, and the end of the outer extension of the output shaft 3 is interference-fitted into the annular groove. The entire end of the output shaft 3 is inserted into the annular groove and interference-fitted with it, which can increase the firmness of the connection between the nozzle 4-1 and the output shaft 3.

[0031] In this embodiment, the nozzle 4-1 is provided with a spray nozzle, the axis of which is perpendicular to the axis of the output shaft 3. This allows the spray nozzle of the nozzle 4-1 to spray water along or near the extension direction of the wiper arm, resulting in more precise water spraying. The connecting pipe 4-2 of the spray bar 4 is located inside the shaft hole 3-1 of the output shaft 3. A water supply pipe 7 is inserted into the shaft hole 3-1 of the output shaft 3 from the other end of the output shaft 3, and is sealed to the connecting pipe 4-2, thus connecting the connecting pipe 4-2 and the water supply pipe 7. Furthermore, the other end of the connecting pipe 4-2 is inserted into the water supply pipe 7 and rotatably fitted within the water supply pipe 7. A sealing ring is provided between the other end of the connecting pipe 4-2 and the water supply pipe 7, forming a sealed connection between the water supply pipe 7 and the connecting pipe 4-2. This achieves the connection between the connecting pipe 4-2 and the water supply pipe 7, and the circumferential rotation of the connecting pipe 4-2 is not restricted by the water supply pipe 7, allowing the nozzle 4-1 to rotate together with the output shaft 3. The sealing ring increases the sealing performance of the connection between the connecting pipe 4-2 and the water supply pipe 7, preventing leakage at the connection point. Furthermore, the shaft hole 3-1 of the output shaft 3 is a stepped hole, with the connecting pipe 4-2 clearance-fitted in the small-diameter section of the stepped hole, and the water supply pipe 7 clearance-fitted in the large-diameter section of the stepped hole. The restraint of the connecting pipe 4-2 and the water supply pipe 7 in the shaft hole 3-1 of the output shaft 3 also reduces the circumferential sway of the connecting pipe 4-2 and the water supply pipe 7.

[0032] In this embodiment, a support portion for the output shaft 3 is provided on the housing of the gearbox 2. The support portion extends away from the housing of the gearbox 2 and has a through hole. The output shaft 3 extends out of the housing of the gearbox 2 through the through hole and slides within the through hole of the support portion, and is sealed with the support portion by a sealing ring. The support portion supports the output shaft 3, making its rotation more stable and reliable. A bearing can be installed between the support portion and the output shaft 3 to reduce the frictional force during rotation. The sealing ring between the output shaft 3 and the support portion prevents water sprayed from the nozzle 4-1 from entering the housing of the gearbox 2, thus preventing water from entering the motor. Furthermore, the water supply pipe 7 is fixedly connected to the housing of the gearbox 2. The direct fixation of the water supply pipe 7 to the housing of the gearbox 2 facilitates assembly. Fixing the water supply pipe 7 to the housing of the gearbox 2 prevents circumferential rotation of the water supply pipe 7, making the overall structure more stable and controllable. Optionally, a connector 5 is provided at one end of the water supply pipe 7. The connector 5 is located outside the housing of the gearbox 2 and is used to connect to a water source. The connector 5 is fixedly connected to the housing of the gearbox 2. Further, the connector 5 has at least one protruding clip. A locking seat 6 is fixedly provided on the housing of the gearbox 2. Two limiting protrusions are provided on the end face of the locking seat 6. The clip on the connector 5 is located between the two limiting protrusions of the locking seat 6 to form a circumferential fixation of the water supply pipe 7. The clip on the connector 5 abuts against the end face of the locking seat 6 to form an axial positioning of the water supply pipe 7. The cooperation between the connector 5 and the locking seat 6 forms a fixed connection between the water supply pipe 7 and the housing of the gearbox 2. The assembly of the water supply pipe 7 is simple and quick, and the connection is stable and reliable. Optionally, one, two, or three protruding clips can be provided on the connector 5. Two or three protruding clips can provide circumferential adjustment space for the water supply pipe 7 during installation.

[0033] In this embodiment, a water spray structure is incorporated into the wiper motor, improving the integration of automotive components and facilitating the layout design of the vehicle space. Furthermore, the spray nozzle 4-1 can rotate synchronously with the output shaft 3, ensuring effective water spraying from the nozzle 4-1 at any position of the wiper arm connected to the output shaft 3. This reduces friction between the wiper arm and the windshield, resulting in better cleaning performance and conserving water. Additionally, the connecting pipe 4-2 of the spray bar 4 and the water supply pipe 7 are both located within the shaft hole 3-1 of the output shaft 3, further enhancing the integration of automotive components and improving the layout design of the vehicle space. The water supply pipeline is also more robust and reliable, protected by the output shaft 3, reducing the failure rate.

Claims

1. A windshield wiper motor, comprising a motor housing and a motor shaft disposed within the motor housing, wherein a reduction gearbox is disposed at one end of the motor housing, the reduction gearbox comprising a gear mechanism driven by the motor shaft, characterized in that, The gear mechanism has an output shaft at its power output end, which drives the windshield wiper arm to reciprocate. One end of the output shaft extends out of the gearbox housing; this end is the outer extension end. The output shaft is a hollow shaft. A support portion for the output shaft is provided on the gearbox housing, extending away from the gearbox housing. The support portion has a through hole, through which the output shaft extends out of the gearbox housing. The output shaft slides within the through hole of the support portion and is sealed to the support portion by a sealing ring. A spray bar is provided on the outer extension end of the output shaft, and the spray bar includes a nozzle and a... A connecting pipe is provided, with the nozzle fixed to one end and the nozzle fixedly connected to the end of the output shaft extension, allowing the nozzle to rotate synchronously with the output shaft. The connecting pipe of the spray bar is located inside the shaft hole of the output shaft. A water supply pipe is inserted into the shaft hole of the output shaft from the other end and is sealed to the connecting pipe, connecting the connecting pipe and the water supply pipe. The other end of the connecting pipe is inserted into the water supply pipe and rotatably fitted within it. A sealing ring is provided between the other end of the connecting pipe and the water supply pipe to form a sealed connection between the water supply pipe and the connecting pipe.

2. The wiper motor according to claim 1, characterized in that: The nozzle is provided with a water spray nozzle, and the axis of the water spray nozzle is perpendicular to the axis of the output shaft.

3. The wiper motor according to claim 1, characterized in that: The nozzle and the end of the output shaft are fixedly connected by an interference fit.

4. The wiper motor according to claim 3, characterized in that: An annular groove is provided at one end of the nozzle near the output shaft, and the end of the outer extension of the output shaft is interference-fitted into the annular groove.

5. The wiper motor according to claim 1, characterized in that: The water supply pipe is fixedly connected to the housing of the gearbox.

6. The wiper motor according to claim 5, characterized in that: A connector is provided at one end of the water supply pipe. The connector is located outside the housing of the gearbox and is used to connect to the water source. The connector is fixedly connected to the housing of the gearbox.

7. The wiper motor according to claim 6, characterized in that: The connector has at least one protruding clip, and a snap-fit ​​seat is fixedly installed on the housing of the gearbox. Two limiting protrusions are provided on the end face of the snap-fit ​​seat. The clip on the connector is located between the two limiting protrusions of the snap-fit ​​seat to form a circumferential fixation of the water supply pipe. The clip on the connector abuts against the end face of the snap-fit ​​seat to form an axial positioning of the water supply pipe.

8. The wiper motor according to claim 1, characterized in that: The output shaft has a stepped bore, the connecting pipe is fitted with the small diameter section of the stepped bore, and the water supply pipe is fitted with the large diameter section of the stepped bore.

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