Automatic return mechanism of wiper motor

Abstract

The utility model provides an automatic return mechanism of a wiper motor, which relates to the technical field of wipers and comprises a mounting rack, a return wiper mechanism is arranged on the mounting rack, and a linkage component is arranged on the return wiper mechanism. According to the automatic return mechanism of the wiper motor, rotation of a push rod can push a sliding block to move along a limiting plate through a fixing rod, the sliding block can push a push block to move through a sliding rod, the push block can push a first driving rod and a second driving rod to move, and the second driving rod can drive a first driving gear to rotate through a first rotating rod; a first rotating rod can drive a second rotating rod and a third driving rod to rotate through meshing of a first driving gear and a first driven gear, so that a windscreen wiper blade can be driven to wipe a windscreen, meanwhile, a spring is extruded through movement of a sliding block to generate elastic force, and when a push rod does not make contact with a fixed rod, the push rod is driven to rotate. And the sliding block can be restored under the elastic action of the spring, so that the wiper blade is driven to automatically return to the bottom of the windshield.

Description

Technical Field

[0001] The utility model relates to a return mechanism, in particular to an automatic return mechanism for a wiper motor, belonging to the technical field of windshield wipers. Background Art

[0002] The windshield wiper is driven by a wiper motor and generally consists of a wiper arm, a wiper blade assembly, a rubber wiper blade, a wiper blade support, a wiper blade holder, a wiper arm spindle, a windshield wiper base plate, a motor, a reduction mechanism, a drive rod system, a drive rod hinge, a windshield wiper switch, and a windshield wiper switch knob, etc.

[0003] In the Chinese Patent Application Publication Specification CN212447432U, a windshield wiper device, a cab, and a work vehicle are disclosed. By connecting a telescopic rod to a coupling assembly and an output shaft assembly, the connection between the output shaft assembly and the coupling assembly can be ensured, which can not only improve the reliability of the connection between the drive mechanism and the output shaft assembly, but also transmit torque quickly, and effectively improve the versatility and use stability of the windshield wiper device.

[0004] In the above patent solutions, the windshield is wiped by driving the wiper through a drive mechanism. However, over time, the link system or gears of the windshield wiper may wear or become loose, resulting in a change in the movement trajectory of the windshield wiper. This may cause the windshield wiper not to stop accurately at the bottom of the windshield, but may stop within the driver's line of sight, affecting the vision.

[0005] Therefore, an automatic return mechanism for a wiper motor is proposed here. Summary of the Utility Model

[0006] The utility model provides an automatic return mechanism for a wiper motor, which can automatically return the wiper to the bottom of the windshield and avoid stopping within the driver's line of sight.

[0007] The utility model is realized through the following technical solutions: an automatic return mechanism for a wiper motor, including a mounting bracket, on which a return wiper mechanism is provided, and a linkage assembly is provided on the return wiper mechanism.

[0008] The return wiper mechanism includes a fixed block, a limit block fixed on the front of the mounting bracket, a first rotating rod and a second rotating rod rotatably connected to the front of the mounting bracket. A sliding rod is slidably connected to the inner wall of the hole of the limit block. One end of the sliding rod away from the limit block is fixed with a slider, and a fixed rod is fixed on the front of the slider. A push rod is fixed on the outer surface of the fixed block. One end of the sliding rod away from the push rod is fixed with a push block.

[0009] One side of the pushing block away from the limiting block is hinged with a first driving rod. One side of the first driving rod away from the mounting bracket is fixed with a second driving rod, and one end of the second driving rod close to the mounting bracket is fixed to one end of a first rotating rod. A first driving gear is fixed on the outer surface of the first rotating rod. A first driven gear is fixed on the outer surface of the second rotating rod, and the first driven gear meshes with the first driving gear. One end of the second rotating rod away from the first driven gear is fixed with a third driving rod.

[0010] Furthermore, a wiper motor body is fixed on the front surface of the mounting bracket, and the output end of the wiper motor body is fixed to one side of the fixed block.

[0011] Furthermore, the linkage assembly includes a fourth rotating rod and a third rotating rod rotatably connected to the front surface of the mounting bracket. One end of the third rotating rod away from the mounting bracket is fixed with a first connecting rod. One end of the first connecting rod away from the third rotating rod is connected to one end of a third connecting rod through a rotating shaft, and one end of the third connecting rod away from the first connecting rod is connected to one end of the first driving rod through a rotating shaft.

[0012] Furthermore, a second driven gear is fixed on the outer surface of the fourth rotating rod. A second driving gear is fixed on the outer surface of the third rotating rod, and the second driving gear meshes with the second driven gear. One end of the fourth rotating rod away from the mounting bracket is fixed with a second connecting rod. Wiper blades are fixed on one side of both the third driving rod and the second connecting rod close to the mounting bracket.

[0013] Furthermore, two limiting plates are fixed on the front surface of the mounting bracket, and the upper and lower sides of the slider are respectively in sliding contact with the closer sides of the two limiting plates.

[0014] Furthermore, a limiting groove is formed inside the limiting plate. A moving block is fixed on one side of the slider close to the limiting groove, and the outer surface of the moving block is in sliding connection with the inner wall of the limiting groove.

[0015] The present utility model provides a wiper motor automatic return mechanism, and the beneficial effects thereof are as follows:

[0016] 1. The automatic return mechanism of the windshield wiper motor drives the fixed block and the push rod to rotate by starting the windshield wiper motor body. The rotation of the push rod can push the slider to move along the limit plate through the fixed rod. The slider can push the push block to move through the sliding rod. The push block can push the first driving rod and the second driving rod to move. The second driving rod can drive the first driving gear to rotate through the first rotating rod. The first rotating rod can drive the second rotating rod and the third driving rod to rotate through the meshing of the first driving gear and the first driven gear, so as to drive the windshield wiper to wipe the windshield. At the same time, the movement of the slider will compress the spring to generate elastic force. When the push rod is not in contact with the fixed rod, the slider will return under the elastic force of the spring, so as to drive the windshield wiper to automatically return to the bottom of the windshield and avoid stopping within the driver's line of sight.

[0017] 2. The automatic return mechanism of the windshield wiper motor can drive the third connecting rod to move while the first driving rod moves. The third connecting rod can drive the first connecting rod to move. The first connecting rod can drive the third rotating rod to rotate. The second driving gear can drive the fourth rotating rod to rotate through the meshing with the second driven gear. The fourth rotating rod can drive the second connecting rod to rotate, so as to drive the windshield wiper to wipe the windshield and realize the synchronous wiping of two windshield wipers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 of the present utility model Figure 1 is an enlarged schematic diagram of the structure at A in

[0020] Figure 3 of the present utility model Figure 1 is an enlarged schematic diagram of the structure at B in

[0021] Figure 4 of the present utility model Figure 1 is an enlarged schematic diagram of the structure at C in

[0022] DESCRIPTION OF THE REFERENCE NUMERALS

[0023] 1. Mounting bracket;

[0024] 2. Return and wiper mechanism; 201. Limit block; 202. Sliding rod; 203. Slider; 204. Fixed rod; 205. Spring; 206. Fixed block; 207. Push rod; 208. Push block; 209. First driving rod; 210. Second driving rod; 211. First rotating rod; 212. First driving gear; 213. Second rotating rod; 214. First driven gear; 215. Third driving rod;

[0025] 3. Linkage component; 301. First connecting rod; 302. Third rotating rod; 303. Second driving gear; 304. Fourth rotating rod; 305. Second driven gear; 306. Second connecting rod; 307. Third connecting rod;

[0026] 4. Windshield wiper; 5. Moving block; 6. Limiting plate; 7. Limiting groove; 8. Windshield wiper motor body. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1 to 4 , an automatic return mechanism for a windshield wiper motor is provided in an embodiment of the present utility model, including a mounting bracket 1. A return windshield wiper mechanism 2 is provided on the mounting bracket 1, and a linkage component 3 is provided on the return windshield wiper mechanism 2.

[0029] Please pay special attention to Figure 1 and Figure 2 , the return windshield wiper mechanism 2 includes a fixed block 206, a limiting block 201 fixed to the front of the mounting bracket 1, a first rotating rod 211 and a second rotating rod 213 rotatably connected to the front of the mounting bracket 1. A sliding rod 202 is slidably connected to the inner wall of the hole of the limiting block 201. One end of the sliding rod 202 away from the limiting block 201 is fixed with a slider 203, and a fixed rod 204 is fixed to the front of the slider 203. A push rod 207 is fixed to the outer surface of the fixed block 206, and a push block 208 is fixed to the end of the sliding rod 202 away from the push rod 207.

[0030] One side of the push block 208 away from the limiting block 201 is hinged with a first driving rod 209. One side of the first driving rod 209 away from the mounting bracket 1 is fixed with a second driving rod 210, and the side of the second driving rod 210 close to the mounting bracket 1 is fixed to one end of the first rotating rod 211. A first driving gear 212 is fixed to the outer surface of the first rotating rod 211. A first driven gear 214 is fixed to the outer surface of the second rotating rod 213, and the first driven gear 214 meshes with the first driving gear 212. One end of the second rotating rod 213 away from the first driven gear 214 is fixed with a third driving rod 215.

[0031] A windshield wiper motor body 8 is fixed to the front of the mounting bracket 1, and the output end of the windshield wiper motor body 8 is fixed to one side of the fixed block 206.

[0032] By starting the wiper motor body 8, the fixed block 206 and the push rod 207 are driven to rotate. The rotation of the push rod 207 can push the slider 203 to move along the limit plate 6 through the fixed rod 204. The slider 203 can push the push block 208 to move through the slide rod 202. The push block 208 can push the first driving rod 209 and the second driving rod 210 to move. The second driving rod 210 can drive the first driving gear 212 to rotate through the first rotating rod 211. The first rotating rod 211 can drive the second rotating rod 213 and the third driving rod 215 to rotate through the meshing of the first driving gear 212 and the first driven gear 214, so as to drive the wiper blade 4 to wipe the windshield. At the same time, the movement of the slider 203 will squeeze the spring 205 to generate elastic force. When the push rod 207 is not in contact with the fixed rod 204, the slider 203 will be restored under the elastic force of the spring 205, so as to drive the wiper blade 4 to automatically return to the bottom of the windshield and avoid stopping within the driver's line of sight.

[0033] Please refer particularly to Figure 1 and Figure 4 The linkage assembly 3 includes a fourth rotating rod 304 and a third rotating rod 302 rotatably connected to the front of the mounting bracket 1. A first connecting rod 301 is fixed to one end of the third rotating rod 302 away from the mounting bracket 1. One end of the first connecting rod 301 away from the third rotating rod 302 is connected to one end of the third connecting rod 307 through a rotating shaft, and one end of the third connecting rod 307 away from the first connecting rod 301 is connected to one end of the first driving rod 209 through a rotating shaft.

[0034] A second driven gear 305 is fixed to the outer surface of the fourth rotating rod 304. A second driving gear 303 is fixed to the outer surface of the third rotating rod 302, and the second driving gear 303 meshes with the second driven gear 305. A second connecting rod 306 is fixed to one end of the fourth rotating rod 304 away from the mounting bracket 1. Wiper blades 4 are fixed to one sides of the third driving rod 215 and the second connecting rod 306 close to the mounting bracket 1.

[0035] The movement of the first driving rod 209 can drive the third connecting rod 307 to move at the same time. The third connecting rod 307 can drive the first connecting rod 301 to move. The first connecting rod 301 can drive the third rotating rod 302 to rotate. The second driving gear 303 can drive the fourth rotating rod 304 to rotate through the meshing with the second driven gear 305. The fourth rotating rod 304 can drive the second connecting rod 306 to rotate, so as to drive the wiper blade 4 to wipe the windshield and realize the synchronous wiping of the two wiper blades 4.

[0036] Please refer particularly to Figure 1 and Figure 2, two limit plates 6 are fixed on the front surface of the mounting bracket 1, and the upper and lower sides of the slider 203 are respectively in sliding contact with the closer sides of the two limit plates 6. A limit groove 7 is formed inside the limit plate 6. A moving block 5 is fixed on the side of the slider 203 close to the limit groove 7, and the outer surface of the moving block 5 is slidably connected to the inner wall of the limit groove 7.

[0037] When the present utility model is in use: By starting the wiper motor body 8 to drive the fixed block 206 and the push rod 207 to rotate, the rotation of the push rod 207 can push the slider 203 to move along the limit plate 6 through the fixed rod 204. The slider 203 can push the push block 208 to move through the slide rod 202. The push block 208 can push the first driving rod 209 and the second driving rod 210 to move. The second driving rod 210 can drive the first driving gear 212 to rotate through the first rotating rod 211. The first rotating rod 211 can drive the second rotating rod 213 and the third driving rod 215 to rotate through the meshing of the first driving gear 212 and the first driven gear 214, so as to drive the wiper blade 4 to wipe the windshield. At the same time, the movement of the slider 203 will squeeze the spring 205 to generate elastic force;

[0038] When the push rod 207 is not in contact with the fixed rod 204, the slider 203 will be restored under the elastic force of the spring 205, so as to drive the wiper blade 4 to automatically return to the bottom of the windshield, avoiding staying within the driver's line of sight. At the same time, the movement of the first driving rod 209 can drive the third connecting rod 307 to move. The third connecting rod 307 can drive the first connecting rod 301 to move. The first connecting rod 301 can drive the third rotating rod 302 to rotate. The second driving gear 303 can drive the fourth rotating rod 304 to rotate through the meshing with the second driven gear 305. The fourth rotating rod 304 can drive the second connecting rod 306 to rotate, so as to drive the wiper blade 4 to wipe the windshield and realize the synchronous wiping of the two wiper blades 4.

[0039] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic return mechanism for a windshield wiper motor, comprising a mounting bracket (1), characterized in that: A return rain scraping mechanism (2) is provided on the mounting bracket (1), and a linkage assembly (3) is provided on the return rain scraping mechanism (2); The return rain scraping mechanism (2) includes a fixed block (206), a limit block (201) fixed to the front of the mounting bracket (1), a first rotating rod (211) and a second rotating rod (213) rotatably connected to the front of the mounting bracket (1). A sliding rod (202) is slidably connected to the inner wall of the hole of the limit block (201). One end of the sliding rod (202) away from the limit block (201) is fixed with a slider (203). A fixed rod (204) is fixed to the front of the slider (203). A push rod (207) is fixed to the outer surface of the fixed block (206). A push block (208) is fixed to the end of the sliding rod (202) away from the push rod (207); One side of the push block (208) away from the limit block (201) is hinged with a first driving rod (209). A second driving rod (210) is fixed to the side of the first driving rod (209) away from the mounting bracket (1). And one end of the second driving rod (210) close to the mounting bracket (1) is fixed to one end of the first rotating rod (211). A first driving gear (212) is fixed to the outer surface of the first rotating rod (211). A first driven gear (214) is fixed to the outer surface of the second rotating rod (213). And the first driven gear (214) meshes with the first driving gear (212). A third driving rod (215) is fixed to the end of the second rotating rod (213) away from the first driven gear (214).

2. The automatic return mechanism of a windshield wiper motor according to claim 1, characterized in that: A rain scraping motor body (8) is fixed to the front of the mounting bracket (1). The output end of the rain scraping motor body (8) is fixed to one side of the fixed block (206).

3. The automatic return mechanism of a windshield wiper motor according to claim 1, wherein: The linkage assembly (3) includes a fourth rotating rod (304) and a third rotating rod (302) rotatably connected to the front of the mounting bracket (1). A first connecting rod (301) is fixed to the end of the third rotating rod (302) away from the mounting bracket (1). One end of the first connecting rod (301) away from the third rotating rod (302) is connected to one end of a third connecting rod (307) through a rotating shaft. And one end of the third connecting rod (307) away from the first connecting rod (301) is connected to one end of the first driving rod (209) through a rotating shaft.

4. The automatic return mechanism of a windshield wiper motor according to claim 3, characterized in that: A second driven gear (305) is fixed to the outer surface of the fourth rotating rod (304). A second driving gear (303) is fixed to the outer surface of the third rotating rod (302). And the second driving gear (303) meshes with the second driven gear (305). A second connecting rod (306) is fixed to the end of the fourth rotating rod (304) away from the mounting bracket (1). Rain scrapers (4) are fixed to the sides of the third driving rod (215) and the second connecting rod (306) close to the mounting bracket (1).

5. The automatic return mechanism of a windshield wiper motor according to claim 1, characterized in that: Two limit plates (6) are fixed to the front of the mounting bracket (1). And the upper and lower sides of the slider (203) are respectively in sliding contact with the sides of the two limit plates (6) close to each other.

6. The automatic return mechanism of a windshield wiper motor according to claim 5, characterized in that: A limiting groove (7) is formed inside the limiting plate (6). A moving block (5) is fixed to one side of the sliding block (203) close to the limiting groove (7), and the outer surface of the moving block (5) is slidably connected to the inner wall of the limiting groove (7).

Images