Wiper motor assembly structure

Abstract

The application relates to a wiper motor assembly structure, which comprises a wiper motor and a mounting plate, the mounting plate is provided with a mounting through hole, the output shaft of the wiper motor is correspondingly assembled in the mounting through hole, the output shaft seat of the wiper motor is provided with an assembly part which extends along the output shaft in the axial direction, the assembly part is penetrated into the mounting through hole, the tail end of the assembly part is provided with a limiting part which is limitedly matched with the mounting plate, the part of the assembly part which extends out of the mounting through hole is matched with a locking device which limits the reverse movement of the assembly part in the axial direction of the mounting through hole, the locking device comprises a locking piece which is movably arranged on the mounting plate in the lateral direction of the mounting through hole, the extending part of the assembly part which extends out of the mounting through hole is provided with a clamping groove, the locking piece is clamped in the clamping groove, the locking piece clamped in the clamping groove limits the reverse movement of the assembly part in the axial direction of the mounting through hole, and the limiting part of the assembly part clamped in the clamping groove is pressed on the mounting plate. The wiper motor assembly structure has the advantages of compact structure, convenient operation and the ability of realizing the dismounting operation of the wiper motor without dismounting the instrument desk.

Description

TECHNICAL FIELD

[0001] The present application relates to a wiper motor assembly structure. BACKGROUND

[0002] The wiper motor is driven by a motor, and the rotation of the motor is converted into the reciprocating motion of the wiper arm through a connecting rod mechanism, thereby realizing the wiper action. The wiper motor generally comprises a driving motor and a small gear transmission. The existing wiper motor installation adopts screw holes provided on the shell and is fixed on the corresponding installation position by locking screws. However, the installation space of the wiper motor is limited, and the installation by locking screws is inconvenient. When the wiper motor is regularly maintained, the instrument desk needs to be removed for disassembly and assembly of the wiper motor, which is inconvenient. SUMMARY

[0003] The present application provides a wiper motor assembly structure which is compact in structure and convenient to operate, and the wiper motor can be disassembled and assembled without removing the instrument desk, thereby having the advantage of convenient operation.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A wiper motor assembly structure comprises a wiper motor and a mounting plate, the mounting plate has a mounting through hole, and the output shaft of the wiper motor is assembled in the mounting through hole. The output shaft seat of the wiper motor extends in the axial direction of the output shaft and has an assembly part, the assembly part is inserted into the mounting through hole, the tail end of the assembly part has a limiting part which is limited in cooperation with the mounting plate, the part of the assembly part which protrudes out of the mounting through hole is matched with a locking device which limits the reverse movement of the assembly part in the axial direction of the mounting through hole, the locking device comprises a locking piece which is movably arranged on the mounting plate in the lateral direction of the mounting through hole, the protruding part of the assembly part is provided with a clamping groove, and the locking piece is clamped in the clamping groove, thereby limiting the reverse movement of the assembly part in the axial direction of the mounting through hole, and the locking piece clamped in the clamping groove constitutes the limiting part of the assembly part which is pressed on the mounting plate.

[0006] By adopting the above technical scheme, the assembly part is formed at the output shaft installation position of the wiper motor, the mounting through hole not only allows the output shaft to pass through and be connected with other mechanisms, but also allows the assembly part to pass through, the locking piece is clamped in the clamping groove to clamp and fix the wiper motor on the mounting plate, and the limiting part is pressed on the mounting plate, thereby achieving reliable fixation. The assembly part is inserted and limited, and the locking piece is operated in the lateral direction of the mounting through hole, which can well adapt to the disassembly and assembly operation in the narrow assembly space, and has the advantages of compact structure and simple and convenient operation.

[0007] Preferably, the locking member comprises an annular body arranged circumferentially around the mounting through hole, the annular body is positioned and rotationally fitted on the mounting plate, and at least two radially extending latches are uniformly and circumferentially distributed on the inner hole wall of the annular body; the protruding portion of the assembly part passing through the mounting through hole is uniformly and circumferentially alternately distributed with recesses corresponding to the latches and side protrusions corresponding to the spacing between the latches; the recesses constitute the allowance for the latches on the locking member when the assembly part is passed through the mounting through hole; the spacing between the latches at the inner hole of the annular body constitutes the allowance for the side protrusions when the assembly part is passed through the mounting through hole; the latch groove is arranged at the end position of the side protrusion corresponding to the assembly part passed through the mounting through hole; and the latches on the annular body are rotated to be clamped into or out of the latch groove.

[0008] By adopting the above technical scheme, the locking member adopts an annular structure, and the recesses and protrusions on the assembly part are designed, which can adapt to the shape of the locking member, the latches on the locking member are matched with the protrusions of the assembly part to reliably lock and fix the assembly part in the circumferential direction, the structure is compact, and the operation is more simple and convenient; in addition, the recesses and protrusions on the circumferential direction of the assembly part are designed, and the protrusions have a reinforcing effect.

[0009] Preferably, the mounting through hole is circumferentially distributed with notches corresponding to the side protrusions, and adjacent notches have solid portions matched with the recesses; the recesses and the side protrusions of the assembly part have extension portions arranged in the mounting through hole; the extension portion of the side protrusion is arranged in the notch, and the solid portion is clamped into the extension portion of the recess, thereby constituting the circumferential limiting matching of the assembly part and the mounting through hole.

[0010] By adopting the above technical scheme, the mounting through hole is arranged in a shape structure corresponding to the circumferential contour of the assembly part, the assembly part is assembled in the mounting through hole in a circumferentially limited manner, the structure is simple and compact, the disassembly and assembly operation is simple and convenient, and the assembly part is firmly and reliably mounted.

[0011] Preferably, the latch groove extends into the mounting through hole, one axial surface of the latch groove and the mounting plate constitute a tensioning interval for clamping the latch, and the latch clamped into the tensioning interval drives the limiting portion to be pressed on the mounting plate.

[0012] By adopting the above technical scheme, the latch groove extends into the mounting through hole, the width of the latch groove is designed to be relatively wide, so that after the latch enters the latch groove, the corresponding axial surface of the latch groove is directly pushed by the mounting plate under the action of the mounting plate, thereby driving the assembly part to move, the limiting portion is pressed on the mounting plate, and the assembly part is reliably fixed; the above structure design is simple and easy to implement.

[0013] Preferably, the mounting plate is provided with a first limit position limiting part and a second limit position limiting part for limiting two positions in the rotating direction of the locking member, the first limit position limiting part constitutes a locking member unlocking limit position limiting part for the locking member to rotate to the tongue withdrawing from the card slot, the second limit position limiting part constitutes a locking member locking limit position limiting part for the locking member to rotate to the tongue being locked in the card slot, and the mounting plate is further provided with a locking position maintaining assembly for maintaining the locking member in the locking position of the locking and fixing assembly part, and the locking position maintaining assembly cooperates with the second limit position limiting part to constitute the locking member being locked in the locking position.

[0014] The above technical scheme limits the two limit positions of the locking member rotating to the unlocking and locking of the assembly part, so that the rotating operation of the locking member is more simple and convenient, and the locking position of the locking member locking the assembly part is limited and maintained by the locking position maintaining assembly, thereby ensuring reliable assembly.

[0015] Preferably, the mounting plate is provided with a locking ring positioning member, the locking ring positioning member comprises an open ring-shaped main body with a break in the circumferential direction, a stepped groove is arranged on the axial end face of the open ring-shaped main body along the inner diameter edge, the stepped groove of the open ring-shaped main body is closed by the mounting plate to constitute a locking member guide groove corresponding to the stepped opening of the open ring-shaped main body in the axial direction, the locking ring positioning member is rotatably fitted in the locking member guide groove, the break ends of the open ring-shaped main body constitute the first limit position limiting part and the second limit position limiting part, the annular main body of the locking member has a first stop tab and a second stop tab protruding from the outer circumference, the first stop tab and the second stop tab are located between the break ends of the open ring-shaped main body, the first stop tab and the first limit position limiting part stop cooperating to constitute the locking member unlocking limit position limiting part, the second stop tab and the second limit position limiting part stop cooperating to constitute the locking member locking limit position limiting part, and the locking position maintaining assembly comprises an elastic limiting part located on the rotating track of the first stop tab rotating with the annular main body, the elastic limiting part is arranged between the two limit position limiting parts, and when a certain rotating torque is applied to the locking member, the first stop tab can extrude and deform the elastic limiting part to make the first stop tab pass the elastic limiting part, the first stop tab and the elastic limiting part stop cooperating in the direction of the locking member rotating to the unlocking limit position, thereby constituting the locking position maintaining of the locking member.

[0016] The positioning rotation of the locking member is realized through a locking member guide groove formed by the locking ring positioning member and the mounting plate, the locking ring positioning member is an open ring, the two ends of the opening of the locking ring positioning member are respectively in stop cooperation with the first stop tab and the second stop tab of the locking member, the stop cooperation is achieved in two directions when the locking member rotates, the structure is simple and compact, and assembly is facilitated; meanwhile, the locking position maintaining assembly includes an elastic limiting member matched with the first stop tab, and when a certain rotating torque is applied to the locking member, the first stop tab can extrude the elastic limiting member to deform so that the first stop tab passes the elastic limiting member, and the locking position of the locking member is maintained through cooperation of the first stop tab, the second stop tab, the elastic limiting member and the second limit position limiting part, and the structure is simple and compact.

[0017] Preferably, the annular body of the locking member can be inserted into and withdrawn from the locking member guide groove along the circumferential break of the locking member guide groove and the opening on the inner diameter side.

[0018] According to the technical scheme, after the assembly part is withdrawn from the mounting through hole, the locking member can be disassembled, and the disassembly operation of the locking member is facilitated.

[0019] Preferably, the elastic limiting member includes an elastic arm extended from one end of the open ring-shaped body corresponding to the first limit position limiting part, and a stop bump is protruded on the free end of the elastic arm towards the inner diameter side of the open ring-shaped body, and the stop bump is matched with the first stop tab.

[0020] According to the technical scheme, the elastic limiting member has a simple structure, is formed on the locking ring positioning member, and is convenient to process and assemble.

[0021] Preferably, the locking position maintaining assembly includes a pin, the locking member and the mounting plate are provided with a pin hole matched with each other, the pin is inserted into the pin hole to realize locking of the locking member on the mounting plate, and the annular body of the locking member extends outwardly from the outer circumferential side to the outer diameter side. According to the technical scheme, the pin is directly used to limit the position of the locking member, the structure is simple, and the positioning is reliable; the handle is designed, the locking member is directly operated, and the handle is designed, the position of the pin hole on the locking member is facilitated to design.

[0022] Preferably, the latch has a slope guide surface for guiding the latch to be inserted into the clamping groove at one end of the circumferential direction of the annular body, and the axial surface of the clamping groove opposite to the mounting plate has a slope surface for guiding the latch to be inserted. According to the technical scheme, the latch is facilitated to be inserted into the clamping groove to achieve tight assembly of the assembly part.

[0023] The application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1It is a structural schematic diagram of the wiper motor assembly structure in a wiper motor assembly state according to a specific embodiment of the present invention;

[0025] Figure 2 This is a diagram of the wiper motor unlocked and disassembled according to a specific embodiment of the present invention;

[0026] Figure 3 This is an exploded view of a locking device according to a specific embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the locking member structure according to a specific embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of a wiper motor according to a specific embodiment of the present invention;

[0029] Figure 6 It is a schematic structural diagram of a locking ring positioning member according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0030] See attached Figures 1-6 The present invention discloses a wiper motor assembly structure, comprising a wiper motor 1 and a mounting plate 2. The mounting plate 2 has a mounting through-hole 21. The output shaft (not shown in the figure) of the wiper motor 1 is correspondingly assembled at the mounting through-hole 21. The output shaft seat of the wiper motor 2 has an assembly portion 11 extending axially along the output shaft. The assembly portion 11 is inserted into the mounting through-hole 21. The assembly portion 11 has a limiting portion 10 at its insertion end that is limited by the mounting plate 2. The portion of the assembly portion 11 extending out of the mounting through-hole 21 is The assembly part 11 is provided with a locking device for limiting the axial reverse movement of the assembly part 11 along the mounting through hole 21. The locking device includes a locking member 31 movably provided on the mounting plate 2 along the side of the mounting through hole 21. The protruding portion of the assembly part 11 extending from the mounting through hole 21 is provided with a slot 113. The locking member 31 is engaged in the slot 113, constituting a limit for the axial reverse movement of the assembly part 11 along the mounting through hole 21. The locking member 31 is engaged in the slot 113, constituting a limit for the assembly part 11 to move in the axial reverse direction along the mounting through hole 21. The locking member 31 is engaged in the slot 113, constituting a limit for the assembly part 11 to be pressed against the mounting plate 2. In addition, the assembly part 11 has an axial hole 110 for supporting the output shaft of the wiper motor. That is, the assembly part also supports the output shaft of the wiper motor, extending the support portion for the output shaft of the wiper motor, making the output shaft of the wiper motor more stable and the power output more reliable. An assembly part is formed at the installation position of the output shaft of the wiper motor. The installation through-hole is not only for the output shaft to pass through and connect to other mechanisms for transmission, but also for the assembly part to pass through. The locking part is snapped into the slot to clamp the wiper motor on the installation plate, and at the same time drives the limiting part to be pressed against the installation plate to achieve reliable fixation; relying on the assembly part to pass through and limit, and cooperating with the locking part that operates laterally along the installation through-hole, it can adapt well to the disassembly and assembly operations in a narrow assembly space, and has the advantages of compact structure and simple and convenient operation.

[0031] Further, the locking member 31 comprises an annular body 311 circumferentially arranged around the mounting through hole 21, the annular body 311 is positioned and rotationally fitted on the mounting plate 2, the inner diameter hole wall of the annular body 311 is uniformly and spacedly distributed with at least two radially extending latches 312, three latches 312 are designed in the specific embodiment, the protruding part of the assembly part 11 passing through the mounting through hole 21 is uniformly and alternately distributed with recesses 111 corresponding to the latches 312 and side protrusions 112 corresponding to the interval between the latches 312 in the circumferential direction, in the specific embodiment, the assembly part 11 comprises a tubular shaft hole seat 11-1 for positioning and supporting the output shaft of the wiper motor 1, a plurality of rib plates are distributed on the outer side of the tubular shaft hole seat 11-1 in the circumferential direction, the rib plates are the side protrusions 112, the interval between the rib plates is the recess 111, which is simple and compact in structure, the recess 111 constitutes the allowance for the latches 312 on the locking member 31 when the assembly part 11 is passed through the mounting through hole 21, the interval 313 between the latches 312 at the inner hole of the annular body 311 constitutes the allowance for the side protrusions 112 when the assembly part 11 is passed through the mounting through hole 21, the latch groove 113 is arranged at the end position of the side protrusion 112 corresponding to the assembly part 11 passing through the mounting through hole 21, the latches 312 on the annular body 31 rotate with the annular body 311 to be clamped into and out of the latch groove 113. When the assembly part 11 is passed through and removed from the mounting through hole 21, the locking member 31 is rotated to correspond the latches 312 to the recesses 111 and the interval 313 between the latches 312 to the side protrusions 112, i.e. the locking of the assembly part 11 by the locking member 31 is released, and the wiper motor can be freely disassembled and assembled; when the wiper motor is installed, the assembly part 11 is inserted into the mounting through hole 21, the locking ring 31 is rotated, the latches 312 of the locking ring 31 are clamped into the latch groove 113, i.e. the limitation and fixation of the assembly part are completed. Of course, as a feasible scheme of the present application, the locking member can also be pivotally connected to the mounting plate at one end, and the locking member can realize the locking and unlocking operation of the assembly part by laterally swinging. Of course, as a feasible scheme of the present application, the locking member can also be pivotally connected to the mounting plate at one end, and the locking member can realize the locking and unlocking operation of the assembly part by laterally swinging; or the locking member is a sliding clamping plate, which is laterally slid and clamped in the latch groove to realize the fixation of the assembly part, etc. However, the structure of the specific embodiment has the advantages of compact structure and firm and reliable fixation of the motor.

[0032] The mounting through hole 21 is circumferentially distributed with notches 21-1 corresponding to the side protrusions 112, and the notches 21-1 have solid portions 21-2 corresponding to the recesses 111. The recesses 111 and the side protrusions 112 of the assembly part 11 extend into the mounting through hole 21. The side protrusion 112 extends into the notch 21-1, and the solid portion 21-2 extends into the recess 111, thereby forming a circumferential limiting fit between the assembly part 11 and the mounting through hole 21. The mounting through hole is designed to have a shape corresponding to the circumferential contour of the assembly part, thereby achieving a circumferentially limited assembly of the assembly part in the mounting through hole. The structure is simple and compact, and the assembly and disassembly are simple and convenient. The assembly part is firmly and reliably mounted. Of course, the positioning of the wiper motor can also be achieved by using other recess and protrusion combinations, such as providing a protrusion on the limiting part and a hole on the mounting plate for cooperation. However, the structure is more compact and the assembly is more convenient by using the shape design of the mounting through hole itself.

[0033] Further, the clamping groove 113 extends into the mounting through hole 21, and one axial surface 1131 of the clamping groove 113 and the mounting plate 2 form a tensioning interval for the clamping tongue 312 to be clamped into. The clamping tongue 312 is clamped into the tensioning interval to drive the limiting part 10 to be pressed against the mounting plate 2. The clamping groove extends into the mounting through hole, and the width of the clamping groove is designed to be relatively wide, so that after the clamping tongue enters the clamping groove, the clamping groove is directly pushed by the mounting plate, thereby driving the assembly part to move and the limiting part to be pressed against the mounting plate, achieving reliable fixation of the assembly part. The above structure design is simple and easy to implement.

[0034] To make the operation more convenient, the mounting plate 2 is provided with a first limit position limiting part I and a second limit position limiting part II for limiting two positions in the rotation direction of the locking member 31. The first limit position limiting part I constitutes a locking member unlocking limit position limiting part for the locking member 31 to rotate to the position where the clamping tongue 312 exits the clamping groove 113. The second limit position limiting part II constitutes a locking member locking limit position limiting part for the locking member 31 to rotate to the position where the clamping tongue 312 is clamped into the clamping groove 113. The mounting plate 2 is also provided with a locking position retaining assembly for retaining the locking member 31 in the position of locking and fixing the assembly part 11. The locking position retaining assembly cooperates with the second limit position limiting part II to lock the locking member 31 in the locking position. The rotation of the locking member to the two limit positions for unlocking and locking the assembly part is limited, making the rotation operation of the locking member more simple and convenient. The locking position retaining assembly is provided to limit and retain the position of the locking member for locking the assembly part, ensuring reliable assembly.

[0035] The mounting plate 2 is provided with a locking ring positioning member 2-1, which comprises an open ring-shaped body with a break 220 in the circumferential direction. A stepped groove 2-10 is arranged on the inner diameter edge of the axial end face of the open ring-shaped body. The stepped groove 2-10 of the open ring-shaped body is closed by the mounting plate 2 to form a locking member guide groove 22 in the axial direction of the open ring-shaped body. The locking ring 31 is positioned and rotationally fitted in the locking member guide groove 22. The break ends of the open ring-shaped body form a first limit position limiting portion I and a second limit position limiting portion II. The outer circumference of the annular body 311 of the locking member 31 is provided with a first stop tab 314 and a second stop tab 315. The first stop tab 314 and the second stop tab 315 are located between the break ends I and II of the open ring-shaped body. The first stop tab 314 is stop-fitted with the first limit position limiting portion I to form an unlocking limit position of the locking member 31. The second stop tab 315 is stop-fitted with the second limit position limiting portion II to form a locking limit position of the locking member 31. The locking position maintaining assembly comprises an elastic limiting member 32 located on the rotation track of the first stop tab 314 along with the annular body 311. The elastic limiting member 32 is arranged between the two limit position limiting portions I and II. When a certain rotational torque is applied to the locking member 31, the first stop tab 314 can extrude and deform the elastic limiting member 32 to make the first stop tab 314 pass the elastic limiting member 32. When the locking member 31 is located at the locking limit position, the first stop tab 314 is stop-fitted with the elastic limiting member 32 in the direction of rotation of the locking member 31 to the unlocking limit position, thereby forming a locking position maintaining of the locking member 31. The positioning and rotating structure of the locking member can also be realized by the cooperation of a positioning shaft and an arc-shaped groove, but the positioning and rotating of the locking member is realized by the locking member guide groove formed by the locking ring positioning member and the mounting plate. The assembly is convenient, and the first stop tab of the locking member can be used to cooperate with the elastic limiting member to limit the position of the locking assembly. The structure is compact.

[0036] The elastic limiting member 32 comprises an elastic arm 2-11 extending from one end of the open ring-shaped body corresponding to the first limit position limiting portion I. A stop block 2-12 is protruded from the free end of the elastic arm 2-11 towards the inner diameter side of the open ring-shaped body. The stop block 2-12 is correspondingly fitted with the first stop tab 314. The elastic limiting member has a simple structure. The locking ring positioning member simultaneously forms a guide structure for the locking member and a position limiting and maintaining structure for the locking member. The structure has high integration degree, few parts, simple and compact structure, and is convenient for processing and assembly.

[0037] In addition, the annular body 311 of the locking member 31 can be inserted into and withdrawn from the locking member guide groove 22 along the circumferential break 220 and the inner diameter side opening 221 of the locking member guide groove 22. After the assembly of the locking ring positioning member and the withdrawal of the installation through hole of the assembly part, the locking member can be directly inserted into and withdrawn from the locking member guide groove 22, and the disassembly operation of the locking member is convenient. In addition, under the action of the elastic limiting member and the locking ring positioning member, the elastic limiting member blocks the locking member when the locking member is in the unlocking position, and the locking member can be disassembled only after being rotated to the locking position, thereby avoiding the problem of easy falling of the locking ring.

[0038] The locking position retaining assembly comprises a pin 33, and corresponding pin holes 316 and 23 are arranged on the locking member 31 and the mounting plate 2, the pin 33 is inserted into the pin holes to realize locking of the locking member 31 on the mounting plate 2, and the annular body 311 of the locking member 31 extends outward from the outer circumferential side to the outer diameter side. The locking member position is directly limited by the pin, the structure is simple, and the positioning is reliable; the design of the handle facilitates direct operation of the locking member, and the design of the handle facilitates the design of the pin hole position on the locking member.

[0039] In order to better enable the clamping tongue 312 to be clamped into the clamping groove 113 and press the limiting part 10 against the mounting plate 2, so as to achieve tight assembly of the assembly part, the clamping tongue 312 has a slope guide surface 3121 for guiding insertion of the clamping tongue 312 into the clamping groove 113 at one end in the circumferential direction of the annular body 311, and the clamping groove 113 has a slope surface 1131 for guiding insertion of the clamping tongue on the axial surface opposite to the mounting plate 2 to form a tensioning interval. The clamping tongue is inserted into the clamping groove to achieve tight assembly of the assembly part.

Claims

1. A wiper motor assembly structure, comprising a wiper motor and a mounting plate, wherein the mounting plate has a mounting through-hole, and the output shaft of the wiper motor is mounted correspondingly in the mounting through-hole, characterized in that: The output shaft seat of the wiper motor is provided with an assembly portion extending axially along the output shaft, the assembly portion is inserted into the mounting through-hole, and a limiting portion is provided at the insertion tail end of the assembly portion that cooperates with the mounting plate. The portion of the assembly portion extending through the mounting through-hole is cooperated with a locking device that limits the axial reverse movement of the assembly portion along the mounting through-hole, and the locking device includes a locking piece that is movably arranged on the mounting plate along the side of the mounting through-hole, and a slot is provided on the protruding portion of the assembly portion extending through the mounting through-hole, and the locking piece is clamped in the slot to limit the axial reverse movement of the assembly portion along the mounting through-hole, and the locking piece is clamped in the slot to form a limit portion of the assembly portion that is pressed against the mounting plate; the locking piece includes an annular main The annular body is positioned and rotated to fit on the mounting plate, and at least two radially extending tongues are evenly spaced circumferentially on the inner diameter hole wall of the annular body, and the protruding part of the assembly part passing through the mounting through hole is evenly and alternately distributed along the circumference with recesses corresponding to the tongues and side protrusions corresponding to the intervals between the tongues. The recesses constitute the position of the assembly part for the tongues on the locking part when it is installed in the mounting through hole, and the intervals between the tongues at the inner hole of the annular body constitute the position of the assembly part for the side protrusions when it is installed in the mounting through hole. The slot is provided at the end position of the side protrusion when the corresponding assembly part is installed in the mounting through hole, and the tongue on the annular body rotates with the annular body to engage in and exit the slot.

2. The wiper motor assembly structure according to claim 1, characterized in that: The mounting through hole is circumferentially distributed with slots corresponding to the side protrusions, and there is a solid portion adapted to the recessed portion between adjacent slots. The recessed portion and the side protrusion of the assembly portion have an extension portion placed in the mounting through hole, the extension portion of the side protrusion is placed in the slot and the solid portion is stuck in the extension portion of the recessed portion, thereby forming a circumferential limiting fit between the assembly portion and the mounting through hole.

3. The wiper motor assembly structure according to claim 1, characterized in that: The slot extends into the mounting through hole, and a tightening gap is formed between an axial surface of the slot and the mounting plate for the latch to be inserted into. The latch is inserted into the tightening gap to drive the limit portion to be pressed against the mounting plate.

4. The wiper motor assembly structure according to claim 1, characterized in that: The mounting plate is provided with a first limit position limiting portion and a second limit position limiting portion for limiting two positions in the rotation direction of the locking member. The first limit position limiting portion constitutes an unlocking limit position limiting portion of the locking member when the locking member rotates to the point where the tongue exits the slot, and the second limit position limiting portion constitutes a locking limit position limiting portion of the locking member when the locking member rotates to the point where the tongue engages in the slot. The mounting plate is also provided with a locking position retaining component for retaining the locking member in the position of the locking and fixing assembly portion. The locking position retaining component cooperates with the second limit position limiting portion to lock the locking member in the locking position.

5. The wiper motor assembly structure according to claim 4, characterized in that: The locking ring positioning piece is provided on the mounting plate, and the locking ring positioning piece includes an open annular body with a fracture in the circumferential direction, and a step-shaped groove is provided on the axial end surface of the open annular body along the inner diameter edge, and the step opening corresponding to the axial direction of the open annular body on the step groove of the open annular body is closed by the mounting plate to form a locking piece guide groove, and the locking ring is positioned and rotated to fit in the locking piece guide groove, and the two end portions of the fracture of the open annular body constitute a first limit position defining portion and a second limit position defining portion, and the outer circumference of the annular body of the locking piece is protruded with a first stop protrusion and a second stop protrusion, and the first stop protrusion and the second stop protrusion are both located between the two end portions of the fracture of the open annular body, and the first stop protrusion The piece cooperates with the stop of the first limit position limiting part to constitute the unlocking limit position limit of the locking part, and the second stop protrusion cooperates with the stop of the second limit position limiting part to constitute the locking limit position limit of the locking part. The locking position holding assembly includes an elastic limit part located on the rotation trajectory of the first stop protrusion rotating with the annular main body. The elastic limit part is arranged between the two limit position limiting parts. When a certain rotational torque is applied to the locking part, the first stop protrusion can squeeze the elastic limit part to deform so that the first stop protrusion passes the elastic limit part. When the locking part is in the locking limit position, the first stop protrusion and the elastic limit part stop and cooperate along the direction in which the locking part rotates toward the unlocking limit position, thereby constituting the locking position retention of the locking part.

6. The wiper motor assembly structure according to claim 5, characterized in that: The annular main body of the locking member can be inserted into and withdrawn from the locking member guide groove along the circumferential fracture and the inner diameter side opening of the locking member guide groove.

7. The wiper motor assembly structure according to claim 5 or 6, characterized in that: The elastic limiting member includes an open annular body with an elastic arm extending from one end corresponding to the first limit position limiting portion, and a stop protrusion protruding from the free end of the elastic arm toward the inner diameter side of the open annular body, and the stop protrusion corresponds to the first stop protrusion.

8. The wiper motor assembly structure according to claim 4, 5 or 6, characterized in that: The locking position retaining assembly includes a pin, and corresponding pin holes are provided on the locking member and the mounting plate. The pin is inserted into the pin hole to lock the locking member on the mounting plate. A handle extends from the outer circumferential side of the annular body of the locking member to the outer diameter side.

9. The wiper motor assembly structure according to claim 1, 2, 3, 4, 5 or 6, characterized in that: One end of the latch tongue along the circumference of the annular body has a slope guide surface for guiding the latch tongue into the slot, and the axial surface of the slot that forms a tensioning interval opposite to the mounting plate has a slope surface for guiding the latch tongue to be inserted.

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