CN215244741U

CN215244741U - Wiper and electric drive

Info

Publication number: CN215244741U
Application number: CN202023212211.1U
Authority: CN
Inventors: 唐鹏程; 赵湛智; 戴宇
Original assignee: Bosch Automotive Products Changsha Co Ltd
Current assignee: Bosch Automotive Products Changsha Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-12-21
Anticipated expiration: 2030-12-28

Abstract

The application provides a wiper and an electric driver. The shell of the electric driver comprises a first shell and a second shell, an inner cavity is formed in the shell, the first shell and the second shell are fixedly bonded together through sealing glue, the first shell is provided with a ventilation channel and a fixing hole used for installing an external fixing part, and the ventilation channel is communicated with the inner cavity and the fixing hole. The armature and the speed change mechanism are arranged in the inner cavity, and the armature is in power connection with the speed change mechanism. One end of the frame plate of the wiper is fixed on the fixing part, the other end opposite to the fixing part is fixed on the fixing hole through the fastening piece, the fastening piece is fixed in the fixing hole to seal the ventilation channel, and the frame pipe is pressed by the frame plate and fixed in the frame pipe part. The technical scheme has the advantages of easy processing and low cost.

Description

Wiper and electric drive

Technical Field

The present application relates to electrically driven devices, and more particularly to an electric drive having a housing adhesively assembled from separate components. The electric drive is used, for example, for a vehicle wiper.

Background

A vehicle wiper generally uses an electric drive as an actuating component, and a housing of the electric drive includes several separately manufactured components, namely a pole housing, a transmission housing, and a transmission cover, which are assembled together to form the housing. A sealed cavity is formed in the housing, and components such as an armature and a speed change gear are mounted in the cavity. During assembly of the housing, the transmission housing and the transmission cover are bonded and sealed with a sealing adhesive. Be provided with ventilative mouthful on the derailleur lid, inside and outside the intercommunication derailleur lid, avoid the inside and outside pressure differential of casing, so at bonding derailleur casing and derailleur lid in-process, be difficult to lead to sealed glue to produce the gas pocket because of inside and outside atmospheric pressure is uneven, so can obtain good bonding and sealed effect. The derailleur lid is hot melt plastics, accomplishes the bonding back rethread local hot melt technology and seals ventilative mouthful, avoids inside dirt such as dust of external environment gets into the casing through ventilative mouthful.

SUMMERY OF THE UTILITY MODEL

The main technical problem who solves of this application is the processing degree of difficulty that reduces current electric drive.

In order to solve the above technical problem, the present application provides an electric driver, which includes:

the shell comprises a first shell and a second shell, an inner cavity is formed in the shell, the first shell and the second shell are fixedly bonded together through sealing, the first shell is provided with a ventilation channel and a fixing hole for installing an external fixing part, and the ventilation channel is communicated with the inner cavity and the fixing hole;

an armature mounted in the internal cavity; and

a speed change mechanism mounted in the internal cavity, the armature being in dynamic communication with the speed change mechanism.

In some embodiments, the fixation hole has an internal thread, and the air-permeable passage communicates with the fixation hole from a position between at least a portion of the internal thread of the fixation hole and the internal cavity.

In some embodiments, the air-permeable passage communicates with the fixing hole from the bottom of the fixing hole.

In some embodiments, the housing includes a stamped and formed armature housing, the armature housing is sealingly assembled with the first housing, the inner cavity is located between the armature housing, the first housing, and the second housing, the armature is mounted in the armature housing, the first housing is a metal piece, and the second housing is a plastic piece.

In some embodiments, the first housing is provided with a shelf tube portion and a plurality of fixation portions, the shelf tube portion being disposed between the plurality of fixation portions, at least one of the fixation portions (16) including the fixation hole.

In some embodiments, the first housing is provided with a shaft hole in which an output shaft is installed, and the rotation generated by the armature is decelerated and torque-increased by the speed change mechanism and then power is output through the output shaft, and the shaft hole is located between the fixing hole and the frame pipe portion.

In another aspect, the present application provides a wiper including a frame plate, the electric driver described above, and a frame tube for fixing to a vehicle body, both ends of the frame plate being fixed to the fixing portions, wherein at least one fastener fastening the frame plate is fixed in the fixing hole to close the air-permeable passage, and the frame tube is pressed by the frame plate to be fixed in the frame tube portion.

In some embodiments, the wiper includes a crank-link mechanism, a crank of the crank-link mechanism being fixed to the output shaft, a link of the crank-link mechanism being pivotally connected to the crank.

In some embodiments, the plurality of fixing portions include one fixing hole and two screw holes or two fastening portions.

In some embodiments, the fastener is a screw, the first housing is partially machined from a die-cast blank, and the vent passage communicates with the securing hole from a location spaced from the fastener.

According to the technical scheme of this application, the ventilative passageway intercommunication of first casing the inner chamber with the fixed orifices, when fixed electric drive, thereby can seal the fixed orifices when fixed with ventilative passageway cuts off with the external world to the realization is sealed, does not need extra process to seal. In addition, the ventilation opening does not need to be sealed by adopting a hot melting process like the prior art, expensive hot melting process equipment is not needed, and the working environment is improved.

Drawings

Specific embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein:

FIG. 1 shows a schematic diagram of an embodiment of an electric drive;

FIG. 2 is a schematic view of a portion of the wiper structure mounted with the electric drive of FIG. 1;

FIG. 3 shows a schematic view of a first housing of the electric drive of FIG. 1; and

fig. 4 shows a schematic cross-sectional view along the line a-a in fig. 3.

Detailed Description

Referring to fig. 1-4, an electric actuator (not numbered) according to one embodiment of the present application includes a housing (not numbered) having an interior cavity 19 formed therein. For example, the housing includes a first housing 1, a second housing 2, and an armature housing 3. The armature housing 3 is formed by, for example, processing using a drawing press forming process. The first housing 1 is a metal member. For example, the first housing 1 is partially machined from a diecast blank, also referred to as transmission housing. The second housing 2 is a plastic part, for example, made of a hot-melt plastic by an injection molding process, and is also referred to as a transmission cover. The cavity 19 is located between the armature housing 3, the first housing 1 and the second housing 2. That is, the inner cavity 19 is a space communicating between the armature housing 3, the first housing 1, and the second housing 2. In general, a part of the inner cavity between the armature housing 3 and the first housing 1 is referred to as an armature cavity, and the inner cavity between the first housing 1 and the second housing 2 is referred to as a transmission cavity.

The armature 30 is mounted in the armature housing 3, i.e. in the aforementioned armature chamber of the inner chamber 19. The variator 6 is mounted in a transmission cavity of the internal cavity 19, and the armature 30 is in dynamic communication with the variator 6. For example, the speed change mechanism 6 is a worm gear speed change mechanism (not shown). The worm is fixed with the armature shaft, and the worm wheel is fixed with the output shaft. Specifically, those skilled in the art will appreciate that the basic structural embodiments of the shift mechanism 6 and the armature 30 are illustrated, and the positions of the shift mechanism 6 and the armature 30 in the housing are indicated by bracketed reference numerals in fig. 1 and 2, but the housing is not disassembled in the drawings to show their details in detail.

The first casing 1 is provided with a rack pipe portion 14 and a plurality of fixing portions 16. The plurality of fixing portions 16 include at least one fixing hole 12 for mounting an external fixing part, that is, each of one or more of the plurality of fixing portions 16 includes the fixing hole 12, or all of the fixing portions 16 include the fixing hole 12. For example, the plurality of fixing portions 16 include one fixing hole 12 and two screw holes or two fastening portions. That is, the fixing portion 16 can be implemented by means of either a screw fastening in some embodiments or a snap fastening in other embodiments. The fixing hole 12 has an internal thread, and the other can be screwed into the mounting fastener 44. The frame tube portion 14 is provided between the plurality of fixing portions 16. The first housing 1 is provided with a ventilation passage 10, and the ventilation passage 10 communicates the inner cavity 19 with the fixing hole 12. The air-permeable passage 10 communicates with the fixing hole 12 from a position between at least part of the internal thread of the fixing hole 12 and the internal cavity 19. That is, the portion of the air-permeable passage 10 communicating with the fixing hole 12 is at least partially internally threaded with the outside so as to form a seal when the fastening member 44 is installed. For example, the air-permeable passage 10 communicates with the fixing hole 12 from the bottom of the fixing hole 12.

When assembling the electric actuator, after mounting internal parts such as an armature, the armature housing 3 is hermetically assembled with the first housing 1, and then the first housing 1 and the second housing 2 are fixed by bonding with a sealant. Since the fixing hole 12 is used for mounting an external fixing part (e.g., the fastener 44), it is in communication with the outside before mounting the fixing part. When the armature housing 3 is assembled with the first housing 1 in a sealing manner, the fastening piece 44 is not installed in the fixing hole 12, and the air-permeable passage 10 can communicate the inner cavity 19 with the air of the external environment of the housing through the fixing hole 12, so that the bonding and sealing effects of the sealant are not easily affected by unbalanced internal and external pressure in the assembling process. After the bonding is finished, the air vent does not need to be specially sealed by a hot melting process like the prior art. Instead, as described below, when the electric drive is fixed, the fixing hole can be closed by the fastening member at the same time as the fixing, so that the ventilation passage is blocked from the outside, thereby achieving the closing without an additional special closing process. Not only does not need expensive hot melting process equipment, but also improves the working environment.

The wiper includes a frame plate 42, an electric drive, and a frame tube 40 for fixing to the vehicle body. The holder plate 42 has opposite ends, and the holder plate 42 is fixed at both ends to the fixing portions 16 when the wiper is assembled, wherein at least one of the fixing portions 16 is fixed to the fixing hole 12 by a fastening member 44. The fastener 44 is fixed in the fixing hole 12 to close the air-permeable passage 10. For example, the fastening member 44 is a screw, and the air-permeable passage 10 communicates with the fixing hole 12 from a position spaced apart from the fastening member 44. The frame tube 40 is pressed by the middle portion between both ends of the frame plate 42 and fixed in the frame tube portion 14. The first housing 1 is provided with a shaft hole 18, and the shaft hole 18 is located between the fixing hole 12 and the frame tube portion 14. An output shaft 60 is attached to the shaft hole 18, and the rotation generated by the armature 30 is decelerated and increased in torque by the transmission mechanism 6, and then power is output through the output shaft 60. The wiper includes a crank-link mechanism having a crank 46 fixed to the output shaft 60 and a link 48 pivotally connected to the crank 46.

Notwithstanding the foregoing, the scope of protection of the present application is defined by the claims.

Description of the reference numerals

First housing 1

Air-permeable passage 10

Fixing hole 12

Frame tube part 14

Fixed part 16

Shaft hole 18

Inner cavity 19

Second housing 2

Armature housing 3

Armature 30

Rack tube 40

Frame plate 42

Fastener 44

Crank 46

Connecting rod 48

Speed change mechanism 6

Output shaft 60

Claims

1. Electric drive, characterized in that it comprises:

the shell comprises a first shell (1) and a second shell (2), an inner cavity (19) is formed in the shell, the first shell (1) and the second shell (2) are bonded and fixed together through a sealant, the first shell (1) is provided with a ventilation channel (10) and a fixing hole (12) for installing an external fixing part, and the ventilation channel (10) is communicated with the inner cavity (19) and the fixing hole (12);

an armature (30) mounted in the internal cavity (19); and

a gear shift mechanism (6) mounted in the internal cavity (19), the armature (30) being in powered connection with the gear shift mechanism (6).

2. The electric drive according to claim 1, wherein the fixation hole (12) has an internal thread, the gas-permeable passage (10) communicating with the fixation hole (12) from a position between at least part of the internal thread of the fixation hole (12) and the inner cavity (19).

3. The electric drive according to claim 1, wherein the gas-permeable passage (10) communicates with the fixing hole (12) from the bottom of the fixing hole (12).

4. The electric drive according to claim 1, wherein the housing comprises a stamped armature housing (3), the armature housing (3) being sealingly assembled with the first housing (1), the inner cavity (19) being located between the armature housing (3), the first housing (1) and the second housing (2), the armature (30) being mounted in the armature housing (3), the first housing (1) being a metal piece and the second housing (2) being a plastic piece.

5. The electric drive according to one of claims 1 to 4, wherein the first housing (1) is provided with a frame tube portion (14) and a plurality of fixing portions (16), the frame tube portion (14) being provided between the plurality of fixing portions (16), at least one of the fixing portions (16) comprising the fixing hole (12).

6. The electric drive according to claim 5, wherein the first housing (1) is provided with a shaft hole (18), an output shaft (60) is installed in the shaft hole (18), and the rotation generated by the armature (30) is decelerated and torque-increased by the speed change mechanism (6) and then power is output through the output shaft (60), and the shaft hole (18) is located between the fixing hole (12) and the frame tube portion (14).

7. Wiper blade, characterized in that it comprises a frame plate (42), an electric drive according to any one of claims 5 to 6 and a frame tube (40) for fixing to the vehicle body, said frame plate (42) being fixed at both ends to said fixing portions (16), at least one fastener (44) fastening said frame plate (42) being fixed to said fixing hole (12) to close said air-permeable passage (10), said frame tube (40) being fixed in said frame tube portion (14) by being pressed against the middle of said frame plate (42).

8. The wiper according to claim 7, wherein said plurality of fixing portions (16) include one said fixing hole (12) and two screw holes or two catching portions.

9. A wiper as claimed in claim 7, wherein said fastening element (44) is a screw, said first housing (1) is partially machined for a diecast blank, said air-permeable channel (10) communicating with said fixing hole (12) from a position spaced from said fastening element (44).

10. Wiper, characterized in that it comprises a frame plate (42), an electric drive according to claim 6 and a frame tube (40) for fixing to the vehicle body, the frame plate (42) being fixed at both ends to the fixing portions (16), at least one fastener (44) fastening the frame plate (42) being fixed to the fixing hole (12) closing the air-permeable channel (10), the frame tube (40) being fixed in the frame tube portion (14) by being pressed against the middle of the frame plate (42), wherein the wiper comprises a crank-link mechanism, the crank (46) of which is fixed to the output shaft (60), the link (48) of which is pivoted to the crank (46).