CN212804130U

CN212804130U - Wiper motor gear and wiper drive assembly with response structure resets

Info

Publication number: CN212804130U
Application number: CN202021323602.8U
Authority: CN
Inventors: 范成志; 张家海; 李发友; 刘锷; 瞿金强; 杨旭东
Original assignee: Sichuan Fuji Electric Motor Co ltd
Current assignee: Sichuan Fuji Electric Motor Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2021-03-26
Anticipated expiration: 2030-07-08

Abstract

The wiper motor gear with the reset induction structure and the wiper driving assembly comprise a gear and a transmission shaft arranged on the axis of the gear, wherein one surface of the gear is provided with a section of arc-shaped contact piece, a ring where the arc-shaped contact piece is located is concentric with the gear, the coverage area of the arc-shaped contact piece on the ring where the arc-shaped contact piece is located is smaller than the uncovered area, the total area of the coverage area and the total area of the ring where the arc-shaped contact piece is located is in a preset proportion, and the arc-shaped contact piece is used for realizing reset when rotating to; the arc-shaped contact piece comprises a pair of pin legs, the pin legs penetrate through one surface of the gear to the other surface of the gear and are exposed, and the exposed parts of the pin legs at the other surface of the gear are bent to be in contact with the other surface of the gear so as to fix the arc-shaped contact piece on the gear. The gear further comprises a protection part for protecting the gear teeth. Not only can realize reseing, the quantity to the contact has only original 1/12~1/5 about moreover, has greatly saved the material, and carries out institutional advancement to the gear front, has improved operating stability.

Description

Wiper motor gear and wiper drive assembly with response structure resets

Technical Field

The utility model relates to a wiper motor especially is relevant with a wiper motor gear and wiper drive assembly structure with response structure resets.

Background

The wiper motor assembly or wiper drive assembly generally includes a motor, worm, gear, etc. In order to realize the reciprocating motion of the wiper, the motor needs to be reset and reversed. In order to achieve the reciprocating effect, generally, a contact piece is arranged on the gear, the contact piece is generally arranged in a circular ring shape, and a small section of the contact piece is broken, so that in the rotating process of the gear, as the contact piece is in the shape of a ring, the contact with a contact part of the shell can be kept for most of the stroke, and the contact with the contact part is broken when the contact piece rotates to the broken part, so that the reset is realized. This structure requires a large number of contact pieces and requires a plurality of gear teeth to be inserted from a plurality of points for mounting and positioning, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

Not enough and defect to above-mentioned relevant prior art, the utility model provides a wiper motor gear and wiper drive assembly with response structure resets not only can realize resetting, and to the quantity of contact piece only about original 1/12~1/5, greatly saved the material moreover, and openly carry out institutional advancement to the gear, improved operating stability.

In order to achieve the above purpose, the utility model adopts the following technology:

wiper motor gear with response structure resets includes the gear to and locate the transmission shaft in gear axle center, its characterized in that:

one side of the gear is provided with a section of arc-shaped contact piece, a ring where the arc-shaped contact piece is located is concentric with the gear, the coverage area of the arc-shaped contact piece on the ring where the arc-shaped contact piece is located is smaller than the uncovered area, the coverage area and the total area of the ring where the arc-shaped contact piece is located are in a preset proportion, and the arc-shaped contact piece is used for realizing resetting when the arc-shaped contact piece rotates to be in contact with a;

the arc-shaped contact piece comprises a pair of pin legs, the pin legs penetrate through one surface of the gear to the other surface of the gear and are exposed, and the exposed parts of the pin legs at the other surface of the gear are bent to be in contact with the other surface of the gear so as to fix the arc-shaped contact piece on the gear.

Further, the gear further includes:

a protection unit for protecting a tooth portion of the gear;

the protection part is positioned on the edge of one surface of the gear where the arc-shaped contact piece is positioned and is positioned between the adjacent tooth parts in a clearance matching manner;

the protective part has a preset thickness and is integrally formed with the gear so as to form a complete circle on one side edge of the gear;

the tooth portion extends from the guard portion toward one face of the tooth portion to the other face of the gear.

Furthermore, one surface of the gear is provided with a plurality of arc grooves along the circumferential array, and the arc grooves are positioned between the arc contact piece and the tooth part along the radial direction.

Further, the arc-shaped contact piece starts from the part of the transmission shaft which penetrates through one surface of the gear and is exposed in the radial direction, and extends to the peripheral side to be terminated at 1/4-2/3 of the radius of one surface of the gear. The part of the transmission shaft penetrating one side of the gear and exposed out is wrapped by the material with the same material as the gear.

Furthermore, the preset proportion of the coverage area of the arc-shaped contact piece to the ring where the arc-shaped contact piece is located to the total area of the ring where the arc-shaped contact piece is located is set according to the interval of the required reset time. The predetermined ratio may be 1/12-1/5.

Further, the gear is used for assembling casing under the wiper motor, and the last casing of wiper motor is used for assembling casing under the wiper motor in order to wrap up the gear between last casing and lower casing, and the last casing of assembly back wiper motor has predetermined distance with the gear, and the last casing of wiper motor is equipped with contact portion for switch on when contacting with the arc contact piece and trigger the reset.

Furthermore, the other surface of the gear is provided with a plurality of grooves separated by annular and radial spacers, the pins are all positioned in one groove or respectively positioned in one groove, and the exposed parts of the pins are in a state of being bent to be in contact with the bottom surface of the groove.

A wiper driving assembly is characterized by comprising a motor, a worm connected with the motor and a wiper motor gear with a reset induction structure, wherein the worm is meshed with the gear tooth.

The utility model has the advantages that:

1. the reset can be realized, the consumption of the butt contact piece is only about 1/12-1/5 of the original consumption, the material is greatly saved, the front surface of the gear is structurally improved, and the operation stability is improved;

2. the gear one side is complete circle, has the guard shield, protects tooth portion and meshing department, has the circular arc groove simultaneously, to not matching adjusting owing to set up the two sides weight that the guard shield arouses, makes under the condition that has this protective structure, does not change original two sides weight matching condition.

Drawings

Fig. 1 is a first structural view of a wiper reset sensing gear according to the prior art.

Fig. 2 is a second structure diagram of a wiper reset sensing gear of the prior art.

Fig. 3 is a first structural view of a gear structure of a wiper motor having a reset sensing structure according to an embodiment of the present application.

Fig. 4 is a second structure diagram of a wiper motor gear structure having a reset sensing structure according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-2, it is a structure of a reset sensing gear of a wiper in the prior art.

It can be seen that, in the reset structure of the prior art, the contact sheet usage is large, the reset is performed by long-time contact and short-time disconnection at the blank position in the rotation, and the installation of the annular contact sheet needs multiple points, generally 4 points.

As shown in fig. 3 to 4, the wiper motor gear with a reset induction structure provided in the embodiment of the present application includes a gear 1 and a transmission shaft 12 disposed at an axis of the gear 1.

One side of the gear 1 is provided with a section of arc-shaped contact piece 2 which is used for realizing reset when the gear rotates to be in contact with a contact part of a shell on a wiper motor. The ring where the arc-shaped contact piece 2 is located is concentric with the gear 1, the coverage area of the arc-shaped contact piece 2 to the ring where the arc-shaped contact piece is located is smaller than the uncovered area, the total area of the coverage area and the ring where the arc-shaped contact piece is located is a preset proportion, and the preset proportion can be 1/12-1/5 according to the interval of required reset time. The contact piece is the metal material for carry out electric conduction, compare with prior art, the quantity of contact piece has greatly been saved to the mode of this embodiment.

The arc contact piece 2 includes a pair of pin 21, and the pin 21 passes through one surface of the gear 1 to the other surface of the gear 1 and is exposed. The other side of the gear 1 is provided with a plurality of grooves 13 separated by annular and radial spacers 14, and the pins 21 are located in one groove 13 or in each groove 13. The exposed portion of the pin 21 at the other surface of the gear 1 is in a state of being bent to contact the bottom surface of the groove 13 to fix the arc-shaped contact piece 2 to the gear 1. Compare with prior art, the contact piece of this embodiment, the installation is simple and easy relatively, because the contact piece area is little, only needs 2 dot bit to fix.

Gear 1 is used for assembling casing under the wiper motor, and the last casing of wiper motor is used for assembling casing under the wiper motor in order to wrap up gear 1 between last casing and lower casing, and assembly back wiper motor goes up the casing and has predetermined distance with gear 1, and the last casing of wiper motor is equipped with contact portion for switch on when contacting with arc contact piece 2 and trigger the reset. By adopting the gear structure of the embodiment, only the electric conduction adjustment of the targeted adjustment reset is needed, for example, the long-time conduction and short-time non-conduction reset with the prior art is changed into the long-time non-conduction and short-time conduction reset.

The preset proportion of the coverage area of the arc-shaped contact piece 2 to the ring where the arc-shaped contact piece is located to the total area of the ring where the arc-shaped contact piece is located is set according to the interval of the required reset time. The predetermined ratio may be 1/12-1/5.

The arc-shaped contact piece 2 is in a shape starting from a part of the transmission shaft 12 penetrating and exposing on one surface of the gear 1 in the radial direction and ending at 1/4-2/3 extending on the radial side of one surface of the gear 1. In particular, the matching with the relative position of the contact portion of the upper case should be considered, so as to be able to achieve the desired reset rhythm. The transmission shaft 12 penetrates through one surface of the gear 1 and the exposed part of the transmission shaft is wrapped by the material made of the same material as the gear 1, and the transmission shaft 12 is used for protecting and avoiding being communicated with the contact piece.

As a preference of this example, the gear 1 further includes: the guard 3 protects the tooth portion 11 of the gear 1.

The protection part 3 is positioned on the edge of one surface of the gear 1 where the arc-shaped contact piece 2 is positioned, and is positioned between the adjacent tooth parts 11 in a clearance matching mode; the protective part 3 has a preset thickness and is integrally formed with the gear 1 so as to form a complete circle on one edge of the gear 1; the tooth portion 11 extends from one surface of the guard portion 3 facing the tooth portion 11 to the other surface of the gear 1. By arranging the protection part 3, one surface of the gear 1 is a complete circle, and the tooth part 11 is covered from one surface, so that the protection of the tooth part 11 and a meshing part is formed. Further, on the basis, one side of the gear 1 is provided with a plurality of arc grooves 31 along the circumferential array, and the radial positions of the arc grooves 31 are positioned between the arc contact pieces 2 and the tooth parts 11, so that the problem of weight mismatch of the two sides caused by the arrangement of the protection parts 3 is solved.

The present application also provides an embodiment of a wiper drive assembly that includes a motor, a worm coupled to the motor, and a gear engaged with the worm. Specifically, the gears used in the examples shown in fig. 3 to 4.

Claims

1. Wiper motor gear with response structure resets includes gear (1) to and locate transmission shaft (12) in gear (1) axle center, its characterized in that:

one side of the gear (1) is provided with a section of arc-shaped contact piece (2), a ring where the arc-shaped contact piece (2) is located is concentric with the gear (1), the coverage area of the arc-shaped contact piece (2) on the ring where the arc-shaped contact piece is located is smaller than the uncovered area, the coverage area and the total area of the ring where the arc-shaped contact piece is located are in a preset proportion, and the arc-shaped contact piece (2) is used for resetting when rotating to be in contact with a contact part of an upper shell of a;

the arc-shaped contact piece (2) comprises a pair of pin (21), the pin (21) penetrates through one surface of the gear (1) to the other surface of the gear (1) and is exposed, and the exposed part of the pin (21) on the other surface of the gear (1) is in a state of being bent to be in contact with the other surface of the gear (1) so as to fix the arc-shaped contact piece (2) on the gear (1).

2. The wiper motor gear having a reset sensing structure according to claim 1, wherein the gear (1) further comprises: a guard section (3) for protecting a tooth section (11) of the gear (1);

the protection part (3) is positioned on one side edge of the gear (1) where the arc-shaped contact piece (2) is positioned, and is positioned between the adjacent tooth parts (11) in a clearance matching manner;

the protective part (3) has a preset thickness and is integrally formed with the gear (1) so as to form a complete circle on one side edge of the gear (1);

the tooth part (11) extends from one surface of the guard part (3) facing the tooth part (11) to the other surface of the gear (1).

3. The wiper motor gear with the reset induction structure according to claim 1, wherein one face of the gear (1) is provided with a plurality of circular arc grooves (31) along a circumferential array, and the circular arc grooves (31) are located at radial positions between the arc contact piece (2) and the tooth portion (11).

4. The wiper motor gear having a reset induction structure according to claim 1, wherein the arc contact piece (2) has a shape that is terminated by extending circumferentially at 1/4-2/3 of a radius of one surface of the gear (1) from a portion of the drive shaft (12) passing through and exposed from the one surface of the gear (1) in a radial direction.

5. The wiper motor gear with the reset induction structure according to claim 3, wherein the exposed part of the transmission shaft (12) penetrating one side of the gear (1) is wrapped by a material with the same material as the gear (1).

6. The wiper motor gear with reset induction structure according to claim 1, characterized in that the predetermined ratio of the coverage area of the arc contact piece (2) to the ring where the arc contact piece is located to the total area of the ring where the arc contact piece is located is set according to the interval of the reset time required.

7. The wiper motor gear having a reset sensing structure according to claim 5, wherein the predetermined ratio is 1/12-1/5.

8. The wiper motor gear with the reset induction structure according to claim 1, wherein the gear (1) is configured to be assembled to a lower housing of a wiper motor, the upper housing of the wiper motor is configured to be assembled to the lower housing of the wiper motor to wrap the gear (1) between the upper housing and the lower housing, and the upper housing of the wiper motor has a predetermined distance from the gear (1) after assembly, and the upper housing of the wiper motor is provided with a contact portion configured to be turned on to trigger reset when contacting with the arc-shaped contact piece (2).

9. The wiper motor gear with the reset induction structure according to claim 1, wherein the other surface of the gear (1) is provided with a plurality of grooves (13) separated by annular and radial spacers (14), the pins (21) are all located in one groove (13) or respectively located in one groove (13), and the exposed parts of the pins (21) are in a state of being bent to be in contact with the bottom surfaces of the grooves (13).

10. A wiper drive assembly comprising a motor, a worm connected to the motor, and a wiper motor gear having a reset sensing structure according to any one of claims 1 to 9, wherein the worm is engaged with a tooth portion (11) of the gear (1).