A connection structure between a sheet metal stamping arm seat and an arm plate of a wiper system

Abstract

A connection structure between a sheet metal stamping arm seat and an arm plate of a wiper system, comprising an arm seat component (100) and an arm plate (300), characterized in that: the arm seat component (100) comprises an arm seat body (110), the head of the arm seat body (110) is provided with an upward structure (112), the upward structure (112) is used to limit the arm plate (300) against the front end sharp edge of the arm seat body (110), that is, the surface contact of the two parts is changed into line contact; the tail of the arm seat body (110) is provided with a sink groove (112) 1), the locking nut (200) is sunk into the sinking groove (111); the small rivet (120) is riveted or punched on the front end of the arm base body (110), and the small rivet (120) is bent into an arc shape; the arm plate (300) is connected with the arm base component (100) through the hook (400) and the rivet (500), the arm plate (300) and the arm base component (100) rotate relative to each other around the rivet (500), and the hook (400) is hung in the middle of the small rivet (120) of the arm base component (100).

Description

Technical Field

[0001] The invention relates to a connection structure between a sheet metal stamping arm seat and an arm plate of a wiper system, and the structure can be applied to an arm seat component of a wiper system. Background Art

[0002] There are two processing methods for the wiper system arm base: ① aluminum alloy or zinc alloy die-casting, ② galvanized steel plate stamping.

[0003] The performance, processing method and contour modeling of stamped arm seats compared with die-cast arm seats are as follows: ① Most of the existing wiper arm seats are die-cast parts, and die-cast arm seats have porosity. Porosity will reduce the strength of the die-cast arm seat, and in severe cases will cause the parts to break and fail. The sheet metal stamping arm seat is made by plastic deformation of steel plates, and will not produce porosity. When the arm seat is locked on the drive shaft of the wiper system, the arm seat will not break. ② After die-casting, the flash burrs produced by the die-casting arm seat need to be removed through the deburring process. Due to manual operation, the die-casting arm seat is prone to obvious bruises, lack of meat and other appearance defects. The sheet metal stamping arm seat only has a stamping process, and the processing process is completed by the equipment, and there will be no state difference. ③ The die-casting arm seat has more processes than the sheet metal stamping arm seat, and the tolerance accumulation and scrap rate will increase geometrically. ④ The sheet metal stamping arm seat has a simple and elegant appearance and a simple and beautiful internal structure.

[0004] The existing stamped arm seats in the automotive market still have a lot of room for improvement, such as: ① The existing sheet metal stamped arm seats are simple in shape, and require more space in the vehicle body than the die-cast arm seats, which does not meet the requirements of compact internal structure of the vehicle body. ② The existing sheet metal stamped arm seats have a large contact area when they cooperate with the arm plate parts. As a result, after the arm seat and the arm plate steel plate are sprayed as a whole, there is a large unsprayed area, and the wiper system faces a huge corrosion risk. ③ In the wiper system, the hook part is hung on the small rivet of the arm seat component. Due to the structural limitations of the sheet metal stamped arm seat component, the small rivet of the arm seat component needs to limit the hook part to its middle position. The existing small rivet processing method is to turn an annular groove in the middle of the small rivet to fix the hook in the position of the annular groove. This turning process is expensive, and the annular groove in the middle of the small rivet is prone to stress concentration, resulting in the risk of fracture, causing the wiper system to fail.

[0005] In order to improve the above problems, the inventors have improved the arm base component. Summary of the invention

[0006] The purpose of the present invention is to provide a connection structure between a sheet metal stamping arm seat and an arm plate of a wiper system, which structure adds a sheet metal stamping arm seat groove so that a locking nut that cooperates with the arm seat component is hidden in the arm seat, thereby reducing the demand of the arm seat component for vehicle body space; by improving the coordination mode between the arm seat component and other parts in the wiper system, the corrosion resistance of the wiper system product is improved; by changing the part shape of the arm seat component, the processing cost of the arm seat component is reduced while realizing the same product function.

[0007] The technical solution of the present invention is:

[0008] A connection structure of a sheet metal stamping arm base and an arm plate of a wiper system, comprising an arm base component 100 and an arm plate 300, wherein the arm base component 100 comprises an arm base body 110, wherein an upward structure 112 is provided at the head of the arm base body 110, and the upward structure 112 is used to limit the arm plate 300 by the front end sharp edge of the arm base body 110, that is, the surface contact of the two parts is changed into line contact; a sinking groove 111 is provided at the rear of the arm base body 110, and a locking nut 200 is sunk into the sinking groove 111; a small rivet 120 is riveted or punched on the front end of the arm base body 110, and the small rivet 120 is bent into an arc;

[0009] The arm plate 300 is connected to the arm base component 100 through a hook 400 and a rivet 500. The arm plate 300 and the arm base component 100 rotate relatively around the rivet 500. The hook 400 is hung in the middle of the small rivet 120 of the arm base component 100.

[0010] The arm base body 110 has a smooth transition in appearance.

[0011] Features of the present invention:

[0012] 1. A sink groove is provided at the tail of the arm seat body, and the locking nut is sunk into the arm seat body, reducing the exposed height of the locking nut and reducing the product size. Although the sink groove structure increases the difficulty of mold design, it reduces the arm seat's requirements for the surrounding space environment, which is conducive to improving the density of body parts.

[0013] 2. An upward structure is designed at the front end of the arm seat body so that the arm plate is limited by the front end sharp edge of the arm seat, thereby eliminating the process of punching convex points at the front end of the sheet metal stamping arm seat body, eliminating the defects of punching small convex points and mold loss.

[0014] 3. The coordination between the arm base and the arm plate is as follows: the arm plate and the arm base rotate relative to each other around the rivet, and the arm plate is limited by the structural shape of the arm base, which ensures that the arm plate is limited accurately and reliably. When the arm base is limited to the arm plate, the surface contact of the two parts becomes line contact, and the key dimensions of the arm base structure are stable and easy to detect.

[0015] 4. Considering the working requirements of the product, the hook needs to be fixed in the center on the small rivet of the sheet metal stamping arm seat component. The existing solution is to machine an annular groove in the middle of the small rivet, and use the annular groove of the small rivet to limit the axial movement of the hook. This patent rolls or punches the small rivet on the arm seat body, and then uses a bending tool to bend the small rivet into an arc, so that the hook is always hung in the middle of the small rivet of the arm seat component. This processing method has high economic efficiency, stable dimensions, and is easy to detect.

[0016] 5. The main body of the arm base has a smooth transition, which is beneficial to improving the appearance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the arm base component 100;

[0018] Figure 2 It is a schematic diagram of parts that cooperate with the arm base component 100;

[0019] Figure 3 is an outline view of the arm base body 110;

[0020] Figure 4 is a partial cross-sectional view of the sink 111;

[0021] Figure 5 It is a schematic diagram of the cooperation between the arm base body 110 and the locking nut 200;

[0022] Figure 6 It is a schematic diagram of the cooperation between the arm base component 100 and the arm plate 300;

[0023] Figure 7 is a schematic diagram of the upward structure 112 of the arm base body 110;

[0024] Figure 8 It is a schematic diagram of the cooperation between the small rivet 120 of the arm base component 100 and the hook 400.

[0025] In the figure: an arm base component 100; an arm base body 110; a sink 111; an upward structure 112; a small rivet 120; an arm plate 300; a hook 400, and a rivet 500. DETAILED DESCRIPTION

[0026] The specific implementation methods, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0027] See also Figure 1-8A connection structure of a sheet metal stamping arm base and an arm plate of a wiper system, comprising an arm base component 100 and an arm plate 300, wherein the arm base component 100 comprises an arm base body 110, and a lifting structure 112 is provided at the head of the arm base body 110, and the lifting structure 112 is used to limit the arm plate 300 by the front end sharp edge of the arm base body 110, that is, the surface contact of the two parts is changed into line contact; a sinking groove 111 is provided at the rear of the arm base body 110, and a locking nut 200 is sunk into the sinking groove 111; a small rivet 120 is riveted or punched on the front end of the arm base body 110, and the small rivet 120 is bent into an arc;

[0028] The arm plate 300 is connected to the arm base component 100 through a hook 400 and a rivet 500. The arm plate 300 and the arm base component 100 rotate relatively around the rivet 500. The hook 400 is hung in the middle of the small rivet 120 of the arm base component 100.

[0029] The arm base body 110 has a smooth transition in appearance.

[0030] Features of the present invention:

[0031] 1. A sink groove is provided at the tail of the arm seat body, and the locking nut is sunk into the arm seat body, reducing the exposed height of the locking nut and reducing the product size. Although the sink groove structure increases the difficulty of mold design, it reduces the arm seat's requirements for the surrounding space environment, which is conducive to improving the density of body parts.

[0032] 2. An upward structure is designed at the front end of the arm seat body so that the arm plate is limited by the front end sharp edge of the arm seat, thereby eliminating the process of punching convex points at the front end of the sheet metal stamping arm seat body, eliminating the defects of punching small convex points and mold loss.

[0033] 3. The coordination between the arm base and the arm plate is as follows: the arm plate and the arm base rotate relative to each other around the rivet, and the arm plate is limited by the structural shape of the arm base, which ensures that the arm plate is limited accurately and reliably. When the arm base is limited to the arm plate, the surface contact of the two parts becomes line contact, and the key dimensions of the arm base structure are stable and easy to detect.

[0034] 4. Considering the working requirements of the product, the hook needs to be fixed in the center on the small rivet of the sheet metal stamping arm seat component. The existing solution is to machine an annular groove in the middle of the small rivet, and use the annular groove of the small rivet to limit the axial movement of the hook. This patent rolls or punches the small rivet on the arm seat body, and then uses a bending tool to bend the small rivet into an arc, so that the hook is always hung in the middle of the small rivet of the arm seat component. This processing method has high economic efficiency, stable dimensions, and is easy to detect.

[0035] 5. The main body of the arm base has a smooth transition, which is beneficial to improving the appearance of the product.

[0036] It should be clear to those skilled in the art that there are many other specific forms to modify the present invention without departing from the spirit and scope of the present invention. Therefore, these examples and embodiments in this patent are only illustrative and not restrictive, and the present invention is not limited to the details given herein, but can be modified within the scope of the appended claims and their equivalents.

Claims

1. A connection structure between a sheet metal stamping arm seat and an arm plate of a wiper system, comprising an arm seat component (100) and an arm plate (300), characterized in that: The arm base component (100) comprises an arm base body (110), the head of the arm base body (110) is provided with an upward structure (112), the upward structure (112) is used to limit the arm plate (300) against the front end sharp edge of the arm base body (110), that is, the surface contact of the two parts is changed into line contact; the rear of the arm base body (110) is provided with a sinking groove (111), and the locking nut (200) is sunk into the sinking groove (111); the small rivet (120) is riveted or punched on the front end of the arm base body (110), and the small rivet (120) is bent into an arc shape; The arm plate (300) is connected with the arm base component (100) through a hook (400) and a rivet (500); the arm plate (300) and the arm base component (100) rotate relative to each other around the rivet (500); and the hook (400) is hung in the middle of the small rivet (120) of the arm base component (100).

2. The connection structure of the sheet metal stamping arm seat and the arm plate of the wiper system according to claim 1, characterized in that: The arm seat body (110) has a smooth transition in appearance.

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