Return integrated automotive wiper motor

Abstract

The utility model relates to a return integrated windscreen wiper motor for a vehicle, which is characterized in that a connecting column, a connecting hole and a fastener are additionally arranged on the basis of retaining the existing connecting mode that a return sheet and a return plastic part are integrally formed, and an elastic back-off positioning pin is abandoned. The connecting column and the gear positioning hole are fixed through a screw, so that connection is convenient, and the return assembly is protected. The design ensures that the contact surface of the return sheet and the return plastic part has no step gap, reduces abnormal reset caused by poor circuit contact, improves the stability, is convenient to disassemble and assemble, protects the integrity of components, avoids disassembly difficulty caused by a reverse buckling problem, and also can ensure that the circuit is reliably connected and disconnected when the windscreen wiper is reset.

Description

TECHNICAL FIELD

[0001] The utility model relates to a return integrated motor for vehicle wiper. BACKGROUND

[0002] The function of the motor for vehicle wiper is to drive the wiper arm to reciprocate, so as to remove the impurities such as rain, snow, dust and the like on the windshield, and ensure the clear vision of the driver.

[0003] The motor gear assembly for vehicle wiper disclosed in the Chinese patent application file with the publication number "CN117189847A" mainly comprises a reed assembly, a return sheet, a return sheet plastic part integrally injection molded with the return sheet, and a gear. The lower end surface of the return sheet plastic part is provided with a positioning foot (a middle part is provided with a notch) capable of being elastically opened and closed. The outer periphery of the positioning foot is provided with a reverse buckle thorn-shaped block capable of being inserted into a positioning hole of the gear, so as to realize the fixed connection of the return assembly (the return sheet and the return sheet plastic part) and the gear.

[0004] The motor gear assembly for vehicle wiper has the following technical problems:

[0005] Firstly, when the return assembly and the gear are assembled, due to the positioning foot, it is necessary to use strong pressure to insert the positioning foot into the positioning hole. If the force is not appropriate, the return sheet is likely to be deformed, so that the reed assembly cannot be in smooth contact with the return sheet, which leads to abnormal circuit connection and affects the working performance of the motor for vehicle wiper. At the same time, when disassembled, a large external force and certain skill are required to remove the reverse buckle from the positioning hole, so that the disassembly of the return assembly and the gear is difficult.

[0006] Secondly, when the return sheet and the return plastic part are integrally injection molded, the metal material return sheet needs to be fixed in the mold in advance, and then the return plastic part is formed by injecting plastic. If the positioning of the return sheet is not accurate, the plastic will be unevenly wrapped, the bonding strength will be insufficient, or the structure will be deviated, which directly affects the flatness of the conductive surface on the return sheet. INVENTION CONTENTS

[0007] The utility model solves the technical problems in the prior art, provides a return integrated motor for vehicle wiper, adopts a connection mode of "integrally forming the return sheet and the return plastic part", reduces the abnormal reset of the vehicle wiper caused by poor circuit contact. At the same time, the connection of the return assembly of the vehicle wiper is optimized, the reverse buckle is replaced by a connecting column and a connecting hole, so as to ensure the stable circuit contact and facilitate the disassembly and installation.

[0008] In order to achieve the above object, the utility model provides the following technical scheme: Return integral type rain -proof wiper motor for vehicle, including shell and installing on the rotor assembly, gear of shell, the output end of rotor assembly is linked with worm, the end of worm far from rotor assembly is hinged to shell, and gear and worm mesh drive, the brush grip assembly is arranged between worm and the output end of rotor assembly, the spring piece assembly is connected to brush grip assembly, the end surface of gear is detachably connected with return assembly, the return assembly includes the return sheet of electrically conductive and the return plastic piece of integrative injection moulding with return sheet, the end of spring piece assembly and the end surface of return assembly are contacted, it is characterized in that: the lower end surface of return plastic piece is provided with a plurality of groups of connecting columns, the screw hole is penetrated in the connecting column, the upper end surface of gear is provided with a group of connecting holes corresponding to each group of connecting columns, the fastener is arranged between return plastic piece and gear, and the return plastic piece and the gear are detachably connected through connecting hole, screw hole.

[0009] Adopt the above technical scheme, keep the "return sheet and return plastic piece integrative forming" connection mode in prior art, ensure that the contact surface of return sheet and return plastic piece (the contact surface is different from prior art, the contact surface refers to the annular conductive surface that is always kept in contact with spring piece assembly during the rotation of return assembly driven by gear, and is not the whole surface) has no step or gap, the contact plane of spring and return sheet is always flat, reduces the abnormal reset of rain -proof wiper caused by poor circuit contact, compared with prior art, add "connecting column (built-in screw hole), connecting hole, fastener (screw and other standard parts)", abandon the existing "elastic inverted clamping positioning foot", the positioning hole of connecting column and gear is fixed through screw, convenient connection, no need for large pressing action, return sheet will not be deformed, protect return assembly, improve the contact stability between return assembly and spring piece assembly. At the same time, only need to loosen the screw to separate return assembly and gear, without destructive operation, protect the integrity of components. Avoid the difficulty of disassembly caused by inverted clamping deviation. Whether in the process of disassembly or installation, the screw is uniformly stressed, and the conductive surface of return sheet and the contact plane of spring will not be deformed or scratched due to external force, to ensure the reliability of circuit on-off when the rain -proof wiper resets.

[0010] The reset integrated motor for vehicle wiper can be further provided with: the middle part of the reset sheet is provided with an inner hollow ring, the inner wall of the inner hollow ring is provided with a protruding block which is integrally formed with the reset sheet and protrudes towards the center of the inner hollow ring, the reset plastic part is provided with an annular step which is matched with the inner hollow ring, the outer circumferential surface of the protruding block is provided with a first positioning groove, and the outer circumferential surface of the annular step is provided with a first positioning block which is matched with the first positioning groove; the outer periphery of the reset sheet is provided with a groove which is recessed towards the center of the inner hollow ring, and the reset plastic part is provided with a sector step which is matched with the groove; the end surface of the annular step, the end surface of the sector step and the end surface of the reset sheet all keep the same plane; the outer periphery of the reset sheet is provided with a second positioning groove, and the reset plastic part is provided with a second positioning block which is matched with the second positioning groove.

[0011] By adopting the technical scheme, the protruding block on the inner wall of the inner hollow ring and the annular step of the reset plastic part are matched through the first positioning groove / first positioning block to form an axial locking and anti-rotation structure, so that it is ensured that the reset sheet will not be displaced or deflected due to the plastic flow pressure during the injection molding process. The second positioning groove on the outer periphery is used for assisting in visual inspection of the burr surface direction. When the spring sheet assembly passes the position of the groove, the reset sheet is not in communication with the spring circuit in the spring sheet assembly; when the spring sheet assembly passes the position of the protruding block, the reset sheet is in communication with the spring circuit in the spring sheet assembly.

[0012] The reset integrated motor for vehicle wiper can be further provided with: the outer edge of the annular step is integrally formed with an annular protruding strip, and the outer edge of the reset plastic part is integrally formed with a circular protruding strip; and the annular protruding strip and the circular protruding strip are both pressed against the reset sheet.

[0013] By adopting the technical scheme, the annular protruding strip (located at the outer edge of the annular step) and the circular protruding strip (located at the outer edge of the reset plastic part) are pressed against the reset sheet to prevent the reset sheet from being separated due to the warping after the injection molding.

[0014] The reset integrated motor for vehicle wiper can be further provided with: the shell comprises a rotor assembly shell for mounting the rotor assembly body, a base fixedly connected with the rotor assembly shell, and an upper cover distributed above the base; a plurality of connecting sheets are arranged in sequence and at intervals along the outer periphery of the upper cover between the upper cover and the base; the upper cover is provided with two groups of symmetrically arranged hook bodies corresponding to each group of connecting sheets, and the two groups of hook bodies are respectively pressed against the two sides of the connecting sheet; the base is provided with a lower stop block corresponding to each group of connecting sheets; the end part of the lower stop block close to the upper cover is provided with an inclined surface; the middle part of the connecting sheet is provided with a clamping hole; and the lower stop block is arranged in the clamping hole and abuts against the end part of the clamping hole.

[0015] The shell is designed as a split structure, facilitating separate disassembly of the rotor assembly or the gear assembly without the need to disassemble the shell as a whole.

[0016] The reset integrated motor for vehicle wiper can be further provided with an arc-shaped actuating body on the upper portion of the connecting piece.

[0017] The arc-shaped actuating body facilitates disassembly of the connecting piece, and the connecting piece can be pulled out after the arc-shaped actuating body is actuated and the connecting piece is pushed down until the lower block does not abut against the end of the clamping hole.

[0018] The utility model will be further explained in detail in combination with the drawings and embodiments. DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the utility model;

[0020] Figure 2 It is an exploded schematic diagram of the embodiment of the utility model;

[0021] Figure 3 It is an exploded schematic diagram of the reset assembly and the gear of the embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the reset plastic piece of the embodiment of the utility model;

[0023] Figure 5 It is a schematic diagram of the connecting piece of the embodiment of the utility model;

[0024] Figure 6 It is Figure 1 It is a local enlarged schematic diagram of position A.

[0025] Label annotation: rotor assembly 1, gear 2, worm 3, brush holder assembly 4, reed assembly 5, return piece 6, return plastic piece 7, connecting column 8, threaded hole 9, connecting hole 10, fastener 11, inner empty ring 12, protrusion 13, annular step 14, first positioning groove 15, first positioning block 16, groove 17, fan-shaped step 18, second positioning groove 19, second positioning block 20, annular convex strip 21, circular convex strip 22, rotor assembly shell 23, base 24, upper cover 25, connecting piece 26, hook body 27, lower stop block 31, inclined surface 28, clamping hole 29, arc-shaped knob 30. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] As Figures 1 to 6The shown return integral type motor for vehicle wiper 1, including shell and rotor assembly 1 installed on the shell, gear 2, the output end of rotor assembly 1 is linked with worm 3, the end of worm 3 away from rotor assembly 1 is hinged on the shell, and gear 2 and worm 3 are engaged transmission, brush holder assembly 4 is arranged between worm 3 and the output end of rotor assembly 1, spring leaf assembly 5 is connected with brush holder assembly 4, return assembly is detachably connected on the end face of gear 2, return assembly includes electrically conductive return sheet 6 and return plastic part 7 integrally injection molded with return sheet 6, the end of spring leaf assembly 5 contacts the end face of return assembly, the lower end face of return plastic part 7 is provided with three groups of connecting columns 8, the inside of connecting column 8 is penetrated by threaded hole 9, the upper end face of gear 2 is provided with a group of connecting holes 10 corresponding to each group of connecting columns 8, fastener 11 is arranged between return plastic part 7 and gear 2, return plastic part 7 and gear 2 are detachably connected through connecting hole 10 and threaded hole 9. The connection mode of "return sheet 6 and return plastic part 7 integrally formed" in the prior art is retained, it is ensured that the contact surface (the contact surface is different from the prior art, which refers to the annular conductive surface that always keeps contact with spring leaf assembly 5 during the rotation of return assembly driven by gear 2, not the whole surface) of return sheet 6 and return plastic part 7 has no step or gap, the contact plane of spring leaf and return sheet 6 is always flat, and the abnormal reset of wiper caused by poor circuit contact is reduced. Compared with the prior art, "connecting column 8 (with built-in threaded hole 9), connecting hole 10 and fastener 11 (screw and other standard parts)" are added, the existing "elastic inverted clamping positioning foot" is abandoned, connecting column 8 and the positioning hole of gear 2 are fixed by screw, the connection is convenient, no large downward action is needed, return sheet 6 will not be deformed, the return assembly is protected, and the contact stability between return assembly and spring leaf assembly 5 is improved. At the same time, the return assembly and gear 2 can be separated by loosening the screw, without destructive operation, the integrity of the components is protected. The difficulty of disassembly caused by the deviation of inverted clamping positioning is avoided. During the disassembly or installation process, the screw is uniformly stressed, the conductive surface of return sheet 6 and the spring leaf contact plane will not be deformed or scratched by external force, and the reliability of the circuit on-off during the reset of the wiper is ensured.

[0028] The middle part of the reset sheet 6 is provided with an inner hollow ring 12, the inner wall of the inner hollow ring 12 is provided with a protruding block 13 which is integrally formed with the reset sheet 6 and protrudes towards the center of the inner hollow ring 12, the reset plastic part 7 is provided with an annular step 14 which is matched with the inner hollow ring 12, the outer circumferential surface of the protruding block 13 is provided with a first positioning groove 15, and the outer circumferential surface of the annular step 14 is provided with a first positioning block 16 which is matched with the first positioning groove 15; the outer circumference of the reset sheet 6 is provided with a recess 17 which is recessed towards the center of the inner hollow ring 12, the reset plastic part 7 is provided with a sector step 18 which is matched with the recess 17, the end surface of the annular step 14, the end surface of the sector step 18 and the end surface of the reset sheet 6 all keep the same plane; the outer circumference of the reset sheet 6 is provided with a second positioning groove 19, and the reset plastic part 7 is provided with a second positioning block 20 which is matched with the second positioning groove 19. The protruding block 13 on the inner wall of the inner hollow ring 12 and the annular step 14 of the reset plastic part 7 are matched through the first positioning groove 15 / first positioning block 16, forming an axial locking and anti-rotation structure, which ensures that the reset sheet 6 will not be displaced or deflected due to the plastic flow pressure during the injection molding process. The second positioning groove 19 on the outer circumference is used for visualizing the direction of burr surface and assisting. When the reed assembly 5 passes the position of the recess 17, the reset sheet 6 is not connected with the reed circuit in the reed assembly 5, and when the reed assembly 5 passes the position of the protruding block 13, the reset sheet 6 is connected with the reed circuit in the reed assembly 5.

[0029] The annular step 14 is integrally formed with an annular protruding strip 21 at the outer edge thereof, and the reset plastic part 7 is integrally formed with a circular protruding strip 22 at the outer edge thereof, and part of the annular protruding strip 21 and part of the circular protruding strip 22 are pressed on the reset sheet 6. The annular protruding strip 21 (located at the outer edge of the annular step 14) and the circular protruding strip 22 (located at the outer edge of the reset plastic part 7) are pressed on the reset sheet 6. This prevents the reset sheet from being separated after injection molding.

[0030] The shell comprises a rotor assembly shell 23 for mounting the rotor assembly 1 body, a base 24 fixedly connected with the rotor assembly shell 23, and an upper cover 25 distributed above the base 24. The upper cover 25 and the base 24 are provided with six groups of connecting pieces 26 arranged along the outer periphery of the upper cover 25 in sequence. The upper cover 25 is provided with two groups of symmetrically arranged hook bodies 27 corresponding to each group of connecting pieces 26. The two groups of hook bodies 27 respectively abut against the two sides of the connecting pieces 26. The base 24 is provided with a lower block 31 corresponding to each group of connecting pieces 26. The end of the lower block 31 close to the upper cover 25 is provided with an inclined surface 28. The middle part of the connecting piece 26 is provided with a clamping hole 29. The lower block 31 is arranged in the clamping hole 29, and the end of the lower block 31 abuts against the clamping hole 29. The shell is designed as a split structure, which facilitates separate disassembly of the rotor assembly 1 or the gear 2 assembly without the need to disassemble the shell as a whole. A plurality of groups of connecting pieces 26 are arranged between the upper cover 25 and the base 24 and are arranged along the outer periphery in sequence to achieve multi-point uniform stress distribution. The two groups of hook bodies 27 are symmetrically arranged to form a plug-in space, and the connecting piece 26 is inserted into the plug-in space. The two groups of hook bodies 27 abut against and fix the connecting piece 26 to form bidirectional limiting and prevent the connecting piece 26 from being displaced laterally in vibration. At the same time, the clamping hole 29 of the connecting piece 26 is sleeved on the outer periphery of the lower block 31 until the end of the clamping hole 29 is blocked by the lower block 31 to complete the fixed connection of the connecting piece 26, the upper cover 25 and the base 24, which is not easy to loosen. The inclined surface 28 arranged on the lower block 31 facilitates the assembly of the connecting piece 26 and avoids interference.

[0031] The upper part of the connecting piece 26 is provided with an arc-shaped actuating body 30. The arc-shaped actuating body 30 facilitates the disassembly of the connecting piece 26. By pulling the arc-shaped actuating body 30, the connecting piece 26 can be pushed downward until the end of the clamping hole 29 is not blocked by the lower block 31, and then the connecting piece 26 can be pulled out. At the same time, when assembling the connecting piece 26, due to the processing error, if the clamping hole 29 and the lower block 31 are not completely connected, the connecting piece 26 can be pressed, and the arc-shaped actuating body 30 will be deformed to lengthen the length of the connecting piece 26 until the clamping hole 29 and the lower block 31 are completely connected and assembled in place.

Claims

1. A return-integrated automotive wiper motor, comprising a housing and a rotor assembly and gear mounted on the housing, wherein a worm gear is driven through the output end of the rotor assembly, the end of the worm gear away from the rotor assembly is hinged to the housing, and the gear meshes with the worm gear for transmission; a brush holder assembly is disposed between the worm gear and the output end of the rotor assembly; a spring assembly is connected to the brush holder assembly; a return assembly is detachably connected to the end face of the gear; the return assembly includes a conductive return plate and a return plastic part integrally injection molded with the return plate; the end of the spring assembly contacts the end face of the return assembly, characterized in that: The lower end face of the reset plastic piece is provided with a plurality of groups of connecting columns, the connecting columns are internally penetrated by threaded holes, the upper end face of the gear is provided with a group of connecting holes corresponding to each group of connecting columns, a fastener is arranged between the reset plastic piece and the gear, and the fastener detachably connects the reset plastic piece and the gear through the connecting holes and the threaded holes.

2. The back- integrated motor for a wiper of a vehicle according to claim 1, wherein: The middle part of the reset piece is provided with an inner hollow ring, the inner wall of the inner hollow ring is provided with a protruding block integrally formed with the reset piece and protruding towards the center of the inner hollow ring, the reset plastic piece is provided with an annular step matched with the inner hollow ring, the outer circumferential surface of the protruding block is provided with a first positioning groove, and the outer circumferential surface of the annular step is provided with a first positioning block matched with the first positioning groove; the outer periphery of the reset piece is provided with a groove recessed towards the center of the inner hollow ring, the reset plastic piece is provided with a fan-shaped step matched with the groove, and the end surface of the annular step, the end surface of the fan-shaped step and the end surface of the reset piece are kept in the same plane; the outer periphery of the reset piece is provided with a second positioning groove, and the reset plastic piece is provided with a second positioning block matched with the second positioning groove.

3. The back- integrated motor for a wiper of a vehicle according to claim 2, wherein: The outer edge of the annular step is integrally formed with an annular protruding strip, the outer edge of the reset plastic piece is integrally formed with a circular protruding strip, and part of the annular protruding strip and part of the circular protruding strip are pressed against the reset piece.

4. The back-EMF integrated motor for a wiper of a vehicle according to any one of claims 1 to 3, characterized in that: The shell comprises a rotor assembly shell for mounting a rotor assembly body, a base fixedly connected with the rotor assembly shell, and an upper cover distributed above the base, a plurality of groups of connecting pieces are arranged between the upper cover and the base and are sequentially and spacedly arranged along the outer periphery of the upper cover, the upper cover is provided with two groups of symmetrically arranged hook bodies corresponding to each group of connecting pieces, the two groups of hook bodies respectively press against both sides of the connecting piece, the base is provided with a lower stopper corresponding to each group of connecting pieces, the end portion of the lower stopper close to the upper cover is provided with an inclined surface, the middle part of the connecting piece is penetrated by a clamping hole, and the lower stopper is arranged in the clamping hole and abuts against the end portion of the clamping hole.

5. The back- integrated motor for a wiper of a vehicle according to claim 4, wherein: The upper part of the connecting piece is provided with an arc-shaped pushing body.

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