A detection mechanism and method for an output shaft of a car wiper

Abstract

The application discloses a kind of automobile wiper output shaft detection mechanism and detection method, detection mechanism includes locating plate, and the side of the top of locating plate is fixedly installed with first locating disc, and the top of first locating disc is fixedly installed with second locating disc, and the inside of locating plate is fixedly installed with fixed bushing, and the middle of the top of second locating disc is fixedly installed with sleeve outside motion detection sleeve, a kind of automobile wiper output shaft detection mechanism of the present application, part is circular part, only need to grind the gap of outer circle, and it is guaranteed to be bright and to slide flexibly by flat grinding and sliding surface, and it is not necessary to be ground by bench worker when assembling, whole processing technology is very simple, and cost is low;Closed ring is formed between locating disc, can be added lubricating oil and will not flow out, guarantee that part will not rust, guarantee smooth sliding;The detection mechanism of the machine is strong in applicability, low in cost, has been used to production site, and has great reference value in the detection of other front and rear wiper product output shaft and promotion.

Description

Technical Field

[0001] This invention relates to the field of automotive windshield wiper technology, specifically to a windshield wiper output shaft detection mechanism and detection method. Background Technology

[0002] The main function of car windshield wipers is to clear rain, snow, and dust from the windshield to ensure driving safety. Windshield wipers are one of the main safety devices in a car, capable of removing raindrops and snowflakes from the windows in snowy or rainy weather, ensuring clear visibility for the driver. The wiper motor drives the output shaft via a worm gear on the armature shaft, which in turn drives the output gear through an idler gear and idler gear shaft. Ultimately, the output shaft operates the output arm connected to the wiper linkage. When the motor rotates, the output arm and linkage are driven to move back and forth, thus achieving the cleaning function of the wipers. The main function of the output shaft on the car windshield wiper is to drive the wiper linkage to achieve back and forth movement. The output shaft of the car windshield wiper needs to be inspected by a testing agency before use.

[0003] However, traditional testing institutions have the following drawbacks:

[0004] (1) The traditional testing mechanism uses 7 square slider parts to form a gap of 1.5mm in the X and Y directions. It is limited to movement in the X and Y directions and cannot move in other directions. The position tolerance is 4mm in the cylinder and all ranges are qualified. However, the traditional testing mechanism has design defects.

[0005] (2) Most of the parts are square, and the processing requires multiple flat grinding, tool roughing, and fine grinding to match the clearance. When the fitter assembles them, he needs to grind each mating surface to ensure smooth sliding. The processing technology is complex and the cost is high.

[0006] (3) The sliding surfaces of traditional testing mechanisms are exposed and prone to rust. They cannot slide during use and cannot be used, causing on-site work stoppage. A fitter needs to go to the site to disassemble and grind them again for repair, which seriously affects the normal operation of production.

[0007] (4) The springs in traditional testing mechanisms are purchased tension springs. The hook parts are not easy to bend and machine. The springs are exposed and are prone to rust. After a long period of use, they are easily broken and need to be replaced, which increases the maintenance cost of the testing mechanism. Summary of the Invention

[0008] The purpose of this invention is to provide a testing mechanism and method for the output shaft of an automotive windshield wiper, addressing the problems mentioned in the background art. Traditional testing mechanisms use seven square slider parts to form a 1.5mm gap in the X and Y directions, limiting movement to these directions only. The positional tolerance is 4mm on a cylinder, which is acceptable. However, traditional mechanisms have design flaws: the parts are mostly square, requiring multiple grinding operations, rough and fine grinding to match the gaps; during assembly, the mating surfaces need grinding to ensure smooth sliding, resulting in complex and costly processes; the exposed mating surfaces of the sliders in traditional mechanisms are prone to rust, causing them to become immobile and requiring on-site disassembly, grinding, and repair, severely impacting production; and the springs in traditional mechanisms are purchased tension springs, which are difficult to bend and machine, leaving them exposed and prone to rust and breakage over time, increasing maintenance costs.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A detection mechanism for the output shaft of an automotive windshield wiper includes a positioning plate. A first positioning disc is fixedly installed on one side of the top of the positioning plate, and a second positioning disc is fixedly installed on the top of the first positioning disc. A fixing bushing is fixedly installed inside the positioning plate. A motion detection sleeve that passes through the second positioning disc is slidably connected inside the fixing bushing. A sleeve located outside the motion detection sleeve is fixedly installed at the middle of the top of the second positioning disc. A pressing groove is formed on one side of the sleeve. A connecting component is slidably connected inside the pressing groove. A handle assembly is fixedly installed on one side of the connecting component. A detection sleeve is fixedly installed at the bottom of the fixing bushing.

[0011] Preferably, a spring located outside the motion detection sleeve is fixedly installed at the bottom end of the connecting component. The bottom end of the spring is fixedly connected to the side of the sleeve facing the sleeve. The bottom end of the connecting component is in contact with the side of the motion detection sleeve facing the sleeve. During the process of the connecting component pressing the motion detection sleeve to slide, the connecting component squeezes the spring from the top. The spring is elastic, and the elastic deformation of the spring buffers the squeezing force.

[0012] Preferably, the connecting assembly includes a baffle and a pressing rod. One end of the baffle is fixedly connected to one end of the pressing rod, and a connecting post is fixedly installed at the other end of the baffle. The middle part of the connecting post is connected to the handle assembly. The connecting post drives the pressing rod to move synchronously through the baffle. The pressing rod squeezes the motion detection sleeve from the top, causing the motion detection sleeve to slide relative to the sleeve.

[0013] Preferably, the handle assembly includes a first handle rod and a second handle rod. One end of the first handle rod is fixedly connected to one end of the second handle rod. A connecting hole is provided in the middle of the first handle rod. The first handle rod is connected to a connecting post through the connecting hole. When the user presses the second handle rod, the second handle rod drives the connecting post through the first handle rod.

[0014] Preferably, the top end of the sleeve is threaded with a nut. When the user rotates the nut, the threads on the inner wall of the nut match the threads on the surface of the sleeve. The nut rotates and rises relative to the sleeve, and the nut adjusts the sliding distance of the motion detection sleeve from the top of the sleeve.

[0015] Preferably, the top of the first positioning disc and the top of the second positioning disc are provided with four positioning holes arranged in a rectangle. The user can screw the screws through the positioning holes to complete the fixing and assembly of the first positioning disc and the second positioning disc.

[0016] Preferably, a fixing hole is provided on the side of the top of the positioning plate away from the first positioning disc, and two limiting holes are provided on the positioning plate respectively on both sides of the fixing hole. The user uses screws to pass through the fixing holes to fix the positioning plate at the place of use.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. It adopts a sleeve-type structure, which is composed of 4 circular parts. The single-sided gap on the circumference is 1.5mm. Position tolerance requirements can be checked in any direction. The design is ingenious and the structure is reasonable.

[0019] 2. The parts are round, so only the outer cylindrical grinding is needed to fit the gap, and the sliding surface needs to be ground to ensure the smoothness and smooth sliding. No fitter grinding is required during final assembly. The entire processing technology is very simple and the cost is low.

[0020] 3. A closed ring is formed between the positioning discs, which allows for the addition of lubricating oil without leakage, ensuring that the parts do not rust and that the sliding is smooth;

[0021] 4. The spring is replaced with a compression spring, which is installed inside the sleeve. It is aesthetically pleasing, practical, and has a long service life. It also enables the spring to be manufactured in-house, reducing the processing cycle and lowering the processing cost.

[0022] 5. The machine's testing mechanism is reasonably designed, ingeniously conceived, highly applicable, and low in cost. It has already been used in production sites and has great reference value for the promotion of testing on the output shafts of other front and rear scraping products. Attached Figure Description

[0023] Figure 1 This is a perspective view of the present invention;

[0024] Figure 2 This is a cross-sectional view of the present invention;

[0025] Figure 3 This is a perspective view of the connecting component of the present invention;

[0026] Figure 4 This is a perspective view of the handle assembly of the present invention.

[0027] In the diagram: 1. Detection sleeve; 2. Motion detection sleeve; 3. Positioning plate; 4. First positioning disc; 5. Second positioning disc; 6. Sleeve; 7. Spring; 8. Connecting assembly; 81. Pressing rod; 82. Baffle; 83. Connecting post; 9. Handle assembly; 91. First handle rod; 92. Second handle; 93. Connecting hole; 10. Nut; 11. Fixing bushing; 12. Fixing hole; 13. Limiting hole; 14. Positioning hole; 15. Pressing groove. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] Please see Figure 1-4 This invention provides a detection mechanism for the output shaft of an automotive windshield wiper, comprising a positioning plate 3, a first positioning disc 4 fixedly mounted on one side of the top of the positioning plate 3, a second positioning disc 5 fixedly mounted on the top of the first positioning disc 4, a fixing bushing 11 fixedly mounted inside the positioning plate 3, a motion detection sleeve 2 slidably connected inside the fixing bushing 11 and passing through the second positioning disc 5, a sleeve 6 located outside the motion detection sleeve 2 fixedly mounted at the middle of the top of the second positioning disc 5, a pressing groove 15 opened on one side of the sleeve 6, a connecting component 8 slidably connected inside the pressing groove 15, a handle component 9 fixedly mounted on one side of the connecting component 8, and a detection sleeve 1 fixedly mounted at the bottom of the fixing bushing 11.

[0030] A spring 7 located on the outside of the motion detection sleeve 2 is fixedly installed at the bottom end of the connecting component 8. The bottom end of the spring 7 is fixedly connected to the side of the sleeve 6 facing the sleeve. The bottom end of the connecting component 8 is in contact with the side of the motion detection sleeve 2 facing the sleeve. During the process of the connecting component 8 pressing the motion detection sleeve 2 to slide, the connecting component 8 squeezes the spring 7 from the top. The spring 7 is elastic and undergoes elastic deformation to buffer the squeezing force.

[0031] The connecting assembly 8 includes a baffle 82 and a pressing rod 81. One end of the baffle 82 is fixedly connected to one end of the pressing rod 81, and a connecting post 83 is fixedly installed on the other end of the baffle 82. The middle part of the connecting post 83 is connected to the handle assembly 9. The connecting post 83 drives the pressing rod 81 to move synchronously through the baffle 82. The pressing rod 81 squeezes the motion detection sleeve 2 from the top, causing the motion detection sleeve 2 to slide relative to the sleeve 6.

[0032] The handle assembly 9 includes a first handle rod 91 and a second handle rod 92. One end of the first handle rod 91 is fixedly connected to one end of the second handle rod 92. A connecting hole 93 is provided in the middle of the first handle rod 91. The first handle rod 91 is connected to the connecting post 83 through the connecting hole 93. When the user presses the second handle rod 92, the second handle rod 91 drives the connecting post 83 through the first handle rod 91.

[0033] The top of the sleeve 6 is threaded with a nut 10. When the user rotates the nut 10, the thread on the inner wall of the nut 10 matches the thread on the surface of the sleeve 6. The nut 10 rotates and rises relative to the sleeve 6, and the nut 10 adjusts the sliding distance of the motion detection sleeve 2 from the top of the sleeve 6.

[0034] The top of the first positioning disc 4 and the top of the second positioning disc 5 are each provided with four positioning holes 14 arranged in a rectangle. The user can screw the screws through the positioning holes 14 to complete the fixing and assembly of the first positioning disc 4 and the second positioning disc 5.

[0035] A fixing hole 12 is provided on the top of the positioning plate 3 away from the first positioning disc 4. Two limiting holes 13 are provided on the positioning plate 3, which are located on both sides of the fixing hole 12. The user uses screws to pass through the fixing holes 12 to fix the positioning plate 3 at the place of use.

[0036] In this embodiment, during use: the single-sided clearance of the detection sleeve 1 is 0.005mm to ensure vertical sliding; the single-sided clearance of the fixed bushing 11 is 1.5mm to ensure a positional accuracy of 3mm; the sliding clearance of the second positioning disc 5 is 0.02mm, ensuring smooth circumferential sliding; the verticality of the first positioning disc 4 is 0.02mm; the first positioning disc 4 contains oil to prevent rust; the verticality of the internal thread of the sleeve 6 is 0.05mm to ensure high verticality of the spring 7 during vertical movement; the spring 7 has dimensions of 1.2x15.8x200mm to ensure the return of the motion detection sleeve 2; and the handle assembly... 9 provides downward pressure, and nut 10 acts as a limit. The user presses the second handle rod 92, and the second handle rod 91 drives the connecting column 83 through the first handle rod 91. The connecting column 93 drives the pressing rod 81 to move synchronously through the baffle 82. The pressing rod 81 squeezes the motion detection sleeve 2 from the top, causing the motion detection sleeve 2 to slide relative to the sleeve 6. The handle assembly 9 presses down and moves in a circular motion to put the sleeve 6 into the output shaft. When it cannot be pressed down, observe whether the through and stop ends of the notch of the detection sleeve 1 are within the range. If they are within the range, the part is judged to be qualified; otherwise, it is unqualified. After the test is completed, it returns to its original position under the action of spring 7, the product is removed, and the measurement is completed.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A detection mechanism for the output shaft of an automotive windshield wiper, comprising a positioning plate (3), characterized in that: A first positioning disc (4) is fixedly installed on one side of the top of the positioning plate (3), a second positioning disc (5) is fixedly installed on the top of the first positioning disc (4), a fixed bushing (11) is fixedly installed inside the positioning plate (3), a motion detection sleeve (2) that passes through the second positioning disc (5) is slidably connected inside the fixed bushing (11), a sleeve (6) located outside the motion detection sleeve (2) is fixedly installed in the middle of the top of the second positioning disc (5), a pressing groove (15) is opened on one side of the sleeve (6), a connecting component (8) is slidably connected inside the pressing groove (15), a handle component (9) is fixedly installed on one side of the connecting component (8), and a detection sleeve (1) is fixedly installed at the bottom of the fixed bushing (11). The bottom end of the connecting assembly (8) is fixedly installed with a spring (7) located outside the motion detection sleeve (2). The bottom end of the spring (7) is fixedly connected to the side of the sleeve (6) facing the sleeve. The bottom end of the connecting assembly (8) is in contact with the side of the motion detection sleeve (2) facing the sleeve. The connecting assembly (8) includes a baffle (82) and a pressing rod (81). One end of the baffle (82) is fixedly connected to one end of the pressing rod (81), and a connecting post (83) is fixedly installed on the other end of the baffle (82). The middle part of the connecting post (83) is connected to the handle assembly (9). During use, the single-sided clearance of the detection sleeve (1) is 0.005mm to ensure vertical sliding, the single-sided clearance of the fixed bushing (11) is 1.5mm to ensure a positional accuracy of 3mm, the sliding clearance of the second positioning disc (5) is 0.02mm, and the installation of the second positioning disc (5) ensures smooth circumferential sliding. The verticality of the first positioning disc (4) is 0.02mm, and the first positioning disc (4) contains oil to prevent rust. The verticality of the internal thread of the sleeve (6) is 0.05mm to ensure high verticality when the spring (7) moves up and down. The specifications of the spring (7) are 1.2x15.8x200 to ensure the return of the moving detection sleeve (2). The handle assembly (9) provides a downward pressing action. The nut (10) serves as a limit. The user presses the second handle rod (92) with his hand. The second handle rod (91) drives the connecting column (83) through the first handle rod (91). The connecting column (93) drives the pressing rod (81) to move synchronously through the baffle (82). The pressing rod (81) squeezes the motion detection sleeve (2) from the top, causing the motion detection sleeve (2) to slide relative to the sleeve (6). The handle assembly (9) presses down and moves in a circular motion to put the sleeve (6) into the output shaft. When it cannot be pressed down, observe whether the notch of the detection sleeve (1) is within the range. If it is within the range, it is judged as qualified. Otherwise, it is unqualified. After the test is completed, it returns to its original position under the action of the spring (7). The product is removed and the measurement is completed.

2. The automotive wiper output shaft detection mechanism according to claim 1, characterized in that: The handle assembly (9) includes a first handle rod (91) and a second handle rod (92). One end of the first handle rod (91) is fixedly connected to one end of the second handle rod (92). A connecting hole (93) is provided in the middle of the first handle rod (91). The first handle rod (91) is connected to the connecting post (83) through the connecting hole (93).

3. The automotive wiper output shaft detection mechanism according to claim 1, characterized in that: The top end of the sleeve (6) is threaded with a nut (10).

4. The automotive wiper output shaft detection mechanism according to claim 1, characterized in that: The top of the first positioning disk (4) and the top of the second positioning disk (5) are provided with four positioning holes (14) arranged in a rectangular shape.

5. The automotive wiper output shaft detection mechanism according to claim 1, characterized in that: The top of the positioning plate (3) is provided with a fixing hole (12) on the side away from the first positioning disc (4), and the positioning plate (3) is provided with two limiting holes (13) located on both sides of the fixing hole (12).

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