High-power brushless wiper motor for passenger car

Abstract

The utility model relates to a high-power brushless wiper motor for a passenger car, which comprises a speed reducer and a brushless motor body, the brushless motor body comprises a barrel shell with a barrel-shaped part and a bottom, the barrel-shaped part and the bottom on the barrel shell are integrally formed, a pair of mounting lugs is welded on the outer circumferential surface of the barrel-shaped part of the barrel shell, and the mounting lugs are welded on the outer circumferential surface of the barrel-shaped part of the barrel shell. The speed reducer comprises a reduction gearbox shell covering the end opening of the barrel shell, an annular groove is formed in the end face of the reduction gearbox shell, the insertion front edge of the barrel shell is inserted into the annular groove, and a sealing mechanism is arranged between the insertion front edge and the reduction gearbox shell. Mounting lug positioning pits protruding inwards are formed in the outer circumferential face of the cylindrical part in a stamping mode, at least two positioning pits are distributed in the circumferential direction of the cylindrical part at intervals, and at least two positioning protruding points are arranged on the face, attached to the cylindrical part, of each mounting lug. And the positioning convex points on the mounting lugs are matched with the positioning concave pits in a one-to-one correspondence manner so as to realize pre-positioning of the mounting lugs on the outer circumferential surface of the cylindrical part. And the mounting lug pre-positioning function is achieved.

Description

Technical Field

[0001] The utility model relates to a windshield wiper motor, in particular to a high-power brushless windshield wiper motor for a bus. Background Art

[0002] The traditional windshield wiper motor for passenger cars adopts carbon brush motor, which has the defects of large size and large space occupation. In addition, due to the large size of the motor barrel shell of the carbon brush motor, it is difficult to form the whole body. Therefore, the existing motor barrel shell is assembled with a tail cover and a barrel shell, which causes certain inconvenience and increases the difficulty of waterproof sealing. Since the brushless motor has no carbon brush, the height of the motor barrel shell is shortened, which is convenient for one-piece molding. The mounting ears are welded on both sides of the one-piece motor barrel shell. The fixed position of the mounting ears is a certain distance from the mouth of the motor barrel shell to form the front end barrel edge of the ring groove of the reduction box shell. However, the outer wall of the existing one-piece motor barrel shell is a flat curved surface. The welding position of the mounting ears is completely guaranteed by the external equipment through data setting, so that the welding position of the mounting ears on the motor barrel shell cannot be conveniently and reliably guaranteed. In addition, the existing motor barrel shell and the reduction box shell are sealed by the cooperation of the sealing ring in the ring groove. There is a situation where the motor barrel shell port and the bottom of the ring groove are offset, and there is still a gap between the mounting ears and the reduction box shell. In this way, the welding force of the mounting ears increases, which affects the service life. Summary of the invention

[0003] The utility model invention aims to overcome the defects of the prior art, and provides a small-volume high-power brushless wiper motor for buses, which has a function of pre-positioning the mounting ears.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A high-power brushless wiper motor for buses comprises a reducer and a brushless motor body, wherein the brushless motor body comprises a barrel shell having a cylindrical portion and a bottom, wherein the cylindrical portion and the bottom on the barrel shell are integrally formed, and a pair of mounting ears are welded on the outer circumferential surface of the cylindrical portion of the barrel shell, wherein the mounting ears are at a certain distance from the end port of the cylindrical portion of the barrel shell so that the cylindrical portion forms a plug-in front, and the reducer comprises a reduction box shell covering the end port of the barrel shell, wherein the end surface of the reduction box shell has an annular groove, wherein the plug-in front edge of the barrel shell is inserted into the annular groove, and a sealing mechanism is provided between the plug-in front edge and the reduction box shell, wherein the reduction box shell is characterized in that: an inwardly convex mounting ear positioning pit is stamped to form an inwardly convex mounting ear positioning pit on the outer circumferential surface of the cylindrical portion, wherein at least two positioning pits are arranged at intervals along the circumference of the cylindrical portion, and at least two positioning protrusions are provided on the surface of the mounting ear that is in contact with the cylindrical portion, and the positioning protrusions on the mounting ear correspond to the positioning pits one by one to constitute a pre-positioning of the mounting ear on the outer circumferential surface of the cylindrical portion.

[0006] Preferably, the sealing mechanism includes a rubber sealing sleeve, which includes a sleeve ring with a U-shaped cross-section. The sleeve ring is sleeved on the plug-in front edge and inserted into the annular groove along the plug-in front edge. The bottom of the annular groove is stepped, and a lower groove is formed on the inner ring side at the bottom of the annular groove. The sleeve ring has a convex rib extending into the lower groove.

[0007] Preferably, the outer ring of the sleeve ring is provided with a flange, a rubber gasket portion is formed on the flange, the rubber gasket portion is padded on the mounting ear, and the rubber gasket portion is provided in an avoidance hole corresponding to the screw hole on the mounting ear.

[0008] Preferably, the outer edge of the mouth of the annular groove has an arc chamfered surface.

[0009] By adopting the above technical scheme, pits are formed by stamping on the outer wall of the integrally formed barrel shell, so that the positioning point can be established through processing precision control, and the convex point and the pit on the mounting ear cooperate to realize the pre-positioning of the mounting ear on the barrel shell, which is convenient for subsequent welding operations; in addition, the convex point and the pit form a fulcrum, which improves the reliability of the welding position; at the same time, the U-shaped sleeve ring of the rubber sealing sleeve realizes a good seal between the end of the barrel shell and the reduction box shell, the bottom of the annular groove adopts a step shape, and the sleeve ring has a low-positioned rib embedded in the sleeve ring to achieve a good seal; more importantly, the sleeve ring has a flange to facilitate the formation of a rubber gasket part, and the rubber gasket part forms an elastic deformation between the mounting ear and the end face of the reduction box shell to better adapt to the fitting clearance between the mounting ear and the reduction box shell, and to ensure reliable locking.

[0010] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of a high-power brushless wiper motor for a passenger car of the utility model;

[0012] Figure 2 This is an exploded view of the barrel shell of the utility model in the unwelded state;

[0013] Figure 3 This is a schematic diagram of the structure of the reducer housing of the utility model;

[0014] Figure 4 This is an exploded view of a high-power brushless wiper motor for a passenger car of the utility model;

[0015] Figure 5 It is a structural schematic diagram of the rubber sealing sleeve of the utility model. DETAILED DESCRIPTION

[0016] See attached Figures 1 to 5The utility model discloses a high-power brushless wiper motor for a bus, comprising a reducer 1 and a brushless motor body 2, wherein the brushless motor body 2 comprises a barrel shell 21 having a cylindrical portion 211 and a bottom 212, wherein the cylindrical portion 211 and the bottom 212 on the barrel shell 21 are integrally formed, and a pair of mounting ears 213 are welded on the outer circumferential surface of the cylindrical portion 211 of the barrel shell 21, wherein the mounting ears 213 are at a certain distance from the end of the cylindrical portion 211 of the barrel shell 21 so that the cylindrical portion forms a plug-in front 2111, and the reducer 1 comprises a reduction box shell 11 covering the end of the barrel shell 21, and the end surface of the reduction box shell 11 has an annular groove 111, The plug-in front edge 2111 of the barrel shell 21 is inserted into the annular groove 111, and a sealing mechanism is provided between the plug-in front edge 2111 and the reduction gear box shell 11. An inwardly convex mounting ear positioning pit 2112 is stamped on the outer circumferential surface of the cylindrical portion 211, and at least two positioning pits 2112 are arranged at intervals along the circumference of the cylindrical portion 211. At least two positioning protrusions 2131 are provided on the surface of the mounting ear 213 that is in contact with the cylindrical portion 211. The positioning protrusions 2131 on the mounting ear 213 correspond to the positioning pits 2112 one by one to constitute a pre-positioning of the mounting ear on the outer circumferential surface of the cylindrical portion 211.

[0017] The sealing mechanism includes a rubber sealing sleeve 3, which includes a sleeve ring 31 with a U-shaped cross-section. The sleeve ring 31 is sleeved on the plug-in front edge 2111 and inserted into the annular groove 111 along with the plug-in front edge 2111. The bottom of the annular groove 111 is stepped, and a lower groove 1111 located on the inner ring side is formed at the bottom of the annular groove 111. The sleeve ring 31 has a convex rib 311 extending into the lower groove 1111. The U-shaped sleeve ring 31 directly sleeved to the front end of the barrel shell 21 is embedded in the annular groove 111 to achieve sealing, and the bottom of the annular groove 111 is designed in a stepped shape, and the convex rib 311 is embedded in the lower groove, so as to achieve better sealing and waterproof performance.

[0018] Under the above-mentioned rubber sealing sleeve design, the outer ring of the sleeve ring 31 is further provided with a flange 32, and a rubber gasket portion 321 is formed on the flange 32. The rubber gasket portion 321 is padded on the mounting ear 213, and the rubber gasket portion 321 is arranged in the avoidance hole corresponding to the screw hole on the mounting ear 213. The rubber is matched between the locking surfaces of the reducer housing and the cylinder shell, which not only improves the sealing performance, but more importantly, the rubber has elastic deformation ability to adapt to the matching gap between the reducer housing and the mounting ear on the cylinder shell, so as to ensure reliable locking while avoiding the formation of torsional stress on the mounting ear and avoid damage to the mounting ear. And the outer edge of the mouth of the annular groove 111 has a circular chamfered surface 1112. To avoid unnecessary damage to the rubber.

[0019] The utility model has the following advantages: 1. A pit is formed by stamping on the outer wall of the integrally formed barrel shell, so that the positioning point can be established through processing precision control, and the convex point and the pit on the mounting ear cooperate to realize the pre-positioning of the mounting ear on the barrel shell, which is convenient for subsequent welding operations and ensures that the two mounting ears are on the same circumference.

[0020] 2. The protrusions and pits form fulcrums, which improves the reliability of the welding position.

[0021] 3. The U-shaped sleeve and flange of the rubber sealing sleeve form a good seal between the end of the barrel shell and the reducer shell. The bottom of the annular groove adopts a step shape, and the sleeve has a low-position convex rib embedded in it to achieve good sealing.

[0022] 4. The sleeve ring has a flange to form a rubber gasket portion. The rubber gasket portion forms elastic deformation between the mounting ear and the end face of the reduction box housing to better adapt to the matching clearance between the mounting ear and the reduction box housing and ensure reliable locking.

Claims

1. A high-power brushless wiper motor for a bus, comprising a reducer and a brushless motor body, wherein the brushless motor body comprises a barrel shell having a cylindrical portion and a bottom, wherein the cylindrical portion and the bottom on the barrel shell are integrally formed, wherein a pair of mounting ears are welded on the outer circumferential surface of the cylindrical portion of the barrel shell, wherein the mounting ears are at a certain distance from the end of the cylindrical portion of the barrel shell so that the cylindrical portion forms a plug-in front edge, wherein the reducer comprises a reduction box shell covering the end of the barrel shell, wherein the end surface of the reduction box shell has an annular groove, wherein the plug-in front edge of the barrel shell is inserted into the annular groove, and a sealing mechanism is provided between the plug-in front edge and the reduction box shell, wherein the reduction box shell has an annular groove, wherein the plug-in front edge and the reduction box shell have an annular groove, wherein the plug-in front edge and the reduction box shell have a sealing mechanism, wherein the reduction box shell has an annular groove, wherein the plug-in front edge and the reduction box shell have a sealing mechanism, wherein the reduction box shell has an annular groove, wherein the plug-in front edge and the reduction box shell have a sealing mechanism, and ... An inwardly convex mounting ear positioning pit is punched on the outer circumferential surface of the cylindrical portion, and at least two of the positioning pits are arranged at intervals along the circumference of the cylindrical portion. At least two positioning protrusions are provided on the surface of the mounting ear that is in contact with the cylindrical portion. The positioning protrusions on the mounting ear correspond to the positioning pits one by one to pre-position the mounting ear on the outer circumferential surface of the cylindrical portion.

2. The high-power brushless wiper motor for a passenger car according to claim 1, characterized in that: The sealing mechanism includes a rubber sealing sleeve, which includes a sleeve ring with a U-shaped cross-section. The sleeve ring is sleeved on the plug-in front edge and inserted into the annular groove along the plug-in front edge. The bottom of the annular groove is stepped, and a lower groove is formed on the inner ring side at the bottom of the annular groove. The sleeve ring has a convex rib extending into the lower groove.

3. The high-power brushless wiper motor for a passenger car according to claim 2, characterized in that: The outer ring of the sleeve ring is provided with a flange, and a rubber gasket portion is formed on the flange. The rubber gasket portion is padded on the mounting ear, and the rubber gasket portion is arranged in an avoidance hole corresponding to the screw hole on the mounting ear.

4. The high-power brushless wiper motor for a passenger car according to claim 3, characterized in that: The outer edge of the mouth of the annular groove has an arc chamfered surface.

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