A wiper system connecting piece

Abstract

The utility model discloses a wiper system connecting piece, including three metal sheets that are integrally connected in proper order and are straight plate, three the metal sheet includes two metal end sheets of length direction parallel and the metal intermediate sheet of arc transition connection between two the metal end sheet, the one end of metal end sheet is provided with the assembly through -hole of extending along the thickness direction of itself away from the metal intermediate sheet, still integrally connected with reinforcing member between two the metal end sheet and two the metal end sheet of the both ends of metal intermediate sheet. The wiper system connecting piece connects metal intermediate sheet and metal end sheet through reinforcing member, has increased the overall structural strength of connecting piece, has improved the stress bearing capacity at the bending, avoided the damage cracking at the bending after long -term use, thus improved the durability of connecting piece, thereby prolonged the service life.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to a wiper system connecting piece. Background Technology

[0002] In a car's windshield wiper system, the wiper motor transmits power through a transmission mechanism. The wiper system connecting plate plays a crucial role in connecting and transmitting power, ensuring that the power from the wiper motor is stably transmitted to the wiper arm. This allows the wiper arm to drive the wiper blade along a predetermined trajectory and in a specific manner, thereby achieving the function of cleaning the car's windshield and ensuring that the driver has a good driving experience in rainy or other inclement weather.

[0003] like Figure 1 As shown, this is a common type of wiper system connector in the prior art. It is made of three metal plates integrally connected and formed into a bent plate structure. The three metal plates are connected by a rounded transition at the bend. Compared with flat plate-shaped wiper system connectors, this type of connector can better adapt to the curvature of the windshield of different car models and the spatial layout of the wiper system through bending at specific angles and shapes. It can also change the direction of force transmission and amplify or reduce the force according to actual needs to meet the force requirements of the wipers in different working states. In addition, it can also cleverly avoid other components around the wiper system, such as the edge of the car hood and the water spray nozzle, to avoid interference during the wiper movement and ensure the reliability and safety of the wiper system.

[0004] However, the aforementioned wiper system connecting plates are prone to stress concentration at bends, especially under long-term alternating loads, which can lead to premature fatigue damage, thereby reducing durability and service life.

[0005] Therefore, it is necessary to improve the bent wiper system connecting piece in the existing technology. Utility Model Content

[0006] The purpose of this invention is to overcome the defects in the existing technology and provide a wiper system connecting piece that enhances durability and extends service life.

[0007] To achieve the above technical effects, the technical solution of this utility model is as follows: a wiper system connecting piece, comprising three metal plates that are integrally connected in sequence and are in the shape of straight plates. The three metal plates include two metal end plates that are parallel in the length direction and a metal middle plate that is connected between the two metal end plates by an arc transition. The end of the metal end plate away from the metal middle plate is provided with an assembly through hole extending along its own thickness direction. The two ends of the metal intermediate plate and the two metal end plates are also integrally connected with reinforcing members.

[0008] A further improvement is that, in order to enhance the structural strength at the bend and improve the stress resistance, the reinforcing member includes reinforcing sheets spaced apart along the width direction of the two metal end plates.

[0009] Preferably, in order to further enhance the structural strength at the bend, the reinforcing sheet includes an inner sheet and an outer sheet respectively disposed on both sides of the metal intermediate plate.

[0010] Preferably, in order to ensure a firm connection between the reinforcing piece and the metal end plate and the metal intermediate plate, and to improve the durability of the connecting piece, the circumferential outer edge of the reinforcing piece includes an intermediate wall integrally connected to the metal intermediate plate, an end wall integrally connected to the corresponding metal end plate, and an arc wall integrally connected to the arc connection between the corresponding metal end plate and the metal intermediate plate.

[0011] Preferably, in order to reduce weight and avoid the connecting piece being too heavy, which would increase the complexity of the wiper motor operation and the vehicle's operating load, the two metal end plates are also provided with weight-reducing recesses or weight-reducing through holes that are spaced apart from the assembly through holes.

[0012] Preferably, in order to ensure the weight reduction effect, the weight reduction through holes are densely distributed on the corresponding metal end plates.

[0013] Preferably, in order to avoid causing excessive structural damage to the connecting piece, the weight-reducing recess is a weight-reducing groove provided on the corresponding metal end plate.

[0014] Preferably, in order to simultaneously consider the structural strength and weight of the connecting piece, the weight-reducing groove includes a first groove that is distributed side by side along the width direction of the corresponding metal end plate and extends along the length direction of the corresponding metal end plate. The first groove includes a constant depth section and a variable depth section that connects the two ends of the constant depth section. Both the constant depth section and the variable depth section extend along the length direction of the first groove. The groove depth of the constant depth section is fixed, and the groove depth of the variable depth section is negatively correlated with the distance between itself and the constant depth section.

[0015] Preferably, in order to simultaneously consider the structural strength and weight of the connecting piece, the weight reduction groove further includes a second groove distributed in a ring array on the outside of the assembly through hole and extending radially along the assembly through hole, wherein the groove depth of the second groove is positively correlated with the distance between itself and the center line of the assembly through hole.

[0016] Preferably, in order to ensure that the structural strength of both sides of the connecting piece is uniform in the thickness direction and to avoid one side being too weak, the weight-reducing grooves are distributed on both sides of the corresponding metal end plate.

[0017] In summary, the wiper system connecting piece of this utility model increases the overall structural strength of the connecting piece by connecting the metal middle plate and the metal end plate with a reinforcing member, improves the stress resistance at the bending point, and avoids damage and cracking at the bending point after long-term use. This improves the durability of the connecting piece and extends its service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the connecting piece in an existing windshield wiper system; Figure 2 This is a schematic diagram of the structure of the first embodiment; Figure 3 yes Figure 1 Side view; Figure 4 This is a schematic diagram of the structure of the second embodiment; Figure 5 yes Figure 4 Top view; Figure 6 This is a structural schematic diagram of the third embodiment; Figure 7 yes Figure 6 Perspective view; Figure 8 yes Figure 6 A schematic diagram of the cross-sectional structure; Figure 9 This is a structural schematic diagram of the fourth embodiment; In the figure: 1. Metal end plate; 11. Assembly through hole; 2. Metal intermediate plate; 3. Reinforcing plate; 31. Inner plate; 32. Outer plate; 33. Intermediate wall; 34. End wall; 35. Arc wall; 4. Weight reduction through hole; 5. First groove; 51. Constant depth section; 52. Variable depth section; 6. Second groove. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0020] First Embodiment

[0021] like Figure 2 and Figure 3 As shown, a wiper system connecting piece according to the first embodiment of the present invention includes three metal plates that are integrally connected in sequence and are in the shape of straight plates. The three metal plates include two metal end plates 1 that are parallel in the length direction and a metal intermediate plate 2 that is connected between the two metal end plates 1 by an arc transition. The end of the metal end plate 1 away from the metal intermediate plate 2 is provided with an assembly through hole 11 extending in its own thickness direction. The two ends of the metal intermediate plate 2 and the two metal end plates 1 are also integrally connected with reinforcing members.

[0022] In this embodiment, the two metal end plates 1 and the metal intermediate plate 2 are made of the same material and can be formed by die casting. The width of the metal end plates 1 and the metal intermediate plate 2 is the same. The three are connected in sequence and the connection is designed with a rounded transition. This can alleviate the influence of geometric change, avoid stress concentration points, and assist in stress transmission. It is convenient to evenly distribute stress to adapt to material deformation. The two metal end plates 1 are provided with mounting through holes 11 at the position away from the metal intermediate plate 2, which can facilitate the assembly and connection with the output end of the wiper motor and the wiper arm. The force of the wiper motor is transmitted to the wiper arm through the connecting piece of this embodiment, so as to drive the wiper arm to move and clean the windshield.

[0023] Nevertheless, due to the bent shape at the connection between the metal end plate 1 and the metal intermediate plate 2, the geometry of the material undergoes abrupt changes. The outer material is stretched and the inner material is compressed, resulting in uneven material distribution after deformation. When the wiper system is working, the connecting piece will be subjected to alternating loads generated by the power transmitted from the wiper motor and the friction between the wiper blade and the windshield. During the cyclical change of the alternating load, microscopic damage will occur to the internal crystal structure of the material, forming microcracks, which will eventually lead to fatigue fracture.

[0024] To avoid the above phenomenon, in this embodiment, a reinforcing member is provided at the bend. The reinforcing member is connected to the metal end plate 1 and the metal intermediate plate 2, which increases the structural strength of the wiper system connecting piece, strengthens the weak parts of the connecting piece, improves the bending resistance and fatigue resistance, thereby improving durability and extending service life.

[0025] A further improvement is that the reinforcing member includes reinforcing pieces 3 spaced apart along the width direction of the two metal end plates 1; the reinforcing pieces 3 include an inner piece 31 and an outer piece 32 respectively disposed on both sides of the metal intermediate plate 2; the circumferential outer edge of the reinforcing pieces 3 includes an intermediate wall 33 integrally connected to the metal intermediate plate 2, an end wall 34 integrally connected to the corresponding metal end plate 1, and an arc wall 35 integrally connected to the arc connection between the corresponding metal end plate 1 and the metal intermediate plate 2.

[0026] With the above design, the reinforcing plate 3 is divided into two types: an inner plate 31, distributed on the inner side of the arc transition connection, and an outer plate 32, distributed on the outer side of the arc transition connection. This ensures that the inner plate 31 and outer plate 32 are distributed on the inner and outer sides of the arc transition connection between the metal end plate 1 and the metal intermediate plate 2, and that both are evenly spaced along the width direction of the metal end plate 1. This strengthens the inner and outer sides of the bend, increasing structural strength, enhancing durability, extending service life, and preventing cracking damage due to stress changes after long-term use. The reinforcing plate 3, metal end plate 1, and metal intermediate plate 2 are all die-cast from the same material, giving the reinforcing plate 3 an end wall 34, an intermediate wall 33, and an arc wall 35 on its circumferential outer edge. The intermediate wall 33, end wall 34, and arc wall 35 are integrally connected to the metal intermediate plate 2, metal end plate 1, and arc transition connection, respectively, ensuring the structural strength of the connection between the reinforcing plate 3 and the metal intermediate plate 2 and metal end plate 1.

[0027] Second Embodiment

[0028] like Figure 4 and Figure 5 As shown, the second embodiment of the present invention provides a wiper system connecting piece, which is based on the first embodiment, but differs in that the two metal end plates 1 are also provided with weight-reducing through holes 4 that are spaced apart from the assembly through holes 11, and the weight-reducing through holes 4 are densely distributed on the corresponding metal end plates 1.

[0029] By providing densely packed weight-reducing through holes 4 on the two metal end plates 1, the overall weight of the wiper system connecting piece in this embodiment is reduced, thereby avoiding an increase in the load on the wiper motor. Furthermore, the reduced weight offsets the increased weight of the reinforcing member, thus ensuring the vehicle's fuel economy. The weight-reducing through holes 4 are spaced apart from the mounting through holes 11, thereby avoiding interference with the connection between the connecting piece and the wiper motor and wiper arm.

[0030] The weight reduction through hole 4 is set on the metal end plate 1 because the flat areas at both ends of the wiper connecting piece, that is, the flat areas connected to the wiper arm and wiper motor, are relatively uniform in force and have low stress. These areas are the most suitable ideal positions for weight reduction in the entire connecting piece. By removing the redundant material on the metal end plate 1, the overall weight can be reduced to offset the weight increase brought by the reinforcing member, while not affecting the basic function of the metal end plate 1.

[0031] Third Embodiment

[0032] like Figures 6-8 As shown, the third embodiment of the present invention provides a wiper system connecting piece, which is based on the second embodiment, but differs in that the two metal end plates 1 are also provided with weight-reducing recesses that are separated from the assembly through holes 11.

[0033] By setting a weight-reducing recess on the metal end plate 1, the same technical effect of setting a weight-reducing through hole 4 on the metal end plate 1 can be achieved, which reduces weight, decreases the complexity of the wiper motor, and ensures the fuel economy of the vehicle.

[0034] A further improvement is that the weight reduction recess is a weight reduction groove provided on the corresponding metal end plate 1.

[0035] Compared to the design using a weight-reducing through-hole 4, the weight-reducing recess in this embodiment is a weight-reducing groove. The groove opening is located on one side of the metal end plate 1, and there is a gap between the groove bottom and the other side of the metal end plate 1. In this way, it avoids causing significant damage to the overall structure of the metal end plate 1 in the thickness direction, allowing a portion of the metal end plate 1 to be retained. While ensuring the weight-reducing effect of the metal end plate 1, it also ensures that it has a certain structural strength, preventing the structural strength from decreasing too much due to the remaining portion of the metal end plate 1, which would make it easy to be damaged.

[0036] A further improvement is that the weight reduction groove includes a first groove 5 arranged side by side along the width direction of the corresponding metal end plate 1 and extending along the length direction of the corresponding metal end plate 1. The first groove 5 includes a constant depth section 51 and a variable depth section 52 connected to both ends of the constant depth section 51. Both the constant depth section 51 and the variable depth section 52 extend along the length direction of the first groove 5. The groove depth of the constant depth section 51 is fixed, and the groove depth of the variable depth section 52 is negatively correlated with the distance between itself and the constant depth section 51.

[0037] The first groove 5 is divided into three sections. The groove depth of the middle section is fixed, while the groove depth of the two ends is negatively correlated with the distance between themselves and the middle section. That is, the farther away from the equal-depth section 51, the smaller the corresponding groove depth. For ease of explanation, the metal end plate 1 is divided into three areas connected in sequence. The first area is the area where the through hole 11 is located, the third area is the area connected to the metal intermediate plate 2, and the second area is between the first area and the third area. For the first groove 5, the equal-depth section 51 is set in the second area, and the two variable-depth sections 52 are set in the first area and the third area respectively.

[0038] First, for the first area, due to the existence of the mounting through hole 11, it needs to be connected to the wiper arm or wiper motor. Usually, when using fasteners such as bolts to fix the connection, local stress will be generated, and the force will spread from the mounting through hole 11 to the surrounding area. Therefore, it is necessary to ensure the deformation resistance around the mounting through hole 11. Secondly, for the third region, the arc transition connection is itself a stress concentration area, and the third region is adjacent to it and will bear the stress transmitted by the arc transition connection. Therefore, it is necessary to avoid the weight reduction depression being too deep, which would lead to a sudden drop in local strength. Finally, for the second region, which is almost unaffected by direct stress (only bearing its own weight and slight vibration), it is the main area for weight reduction. The groove depth of the equal depth section 51 can be appropriately increased so that the groove depth of the equal depth section 51 is greater than the groove depth at both ends of the first groove 5. This is to reduce the weight of the metal end plate 1 as much as possible while ensuring the structural strength of the connecting piece, thus achieving lightweighting. In this way, the balance between structural strength and lightweighting of the wiper system connecting piece in this embodiment is achieved.

[0039] A further improvement is that the first groove 5 is distributed on both sides of the corresponding metal end plate 1. The first groove 5 on both sides is staggered along the width direction of the metal end plate 1. In this way, the thickness dimension of each part is basically the same along the width direction of the metal end plate 1, so that the structural strength of each part is basically the same. This avoids the local groove depth being too large, which would affect the structural strength and make the parts with less remaining material easy to deform or be damaged.

[0040] Fourth embodiment

[0041] like Figure 9 As shown, the fourth embodiment of the present invention provides a wiper system connecting piece based on the third embodiment, the difference being that the weight reduction groove further includes a second groove 6 distributed in a ring array on the outside of the mounting through hole 11 and extending radially along the mounting through hole 11. The groove depth of the second groove 6 is positively correlated with the distance between itself and the axis of the mounting through hole 11. The second groove 6 is distributed on both sides of the metal end plate 1.

[0042] By adopting this design and adding a second groove 6, the weight can be further reduced, achieving lightweighting. The depth of the second groove 6 increases with the distance between itself and the axis of the mounting through hole 11. This is mainly because the closer to the mounting through hole 11, the greater the corresponding stress. Therefore, the above design is chosen so that the thickness of the circumferential area of ​​the mounting through hole 11 can match the stress to be borne, thereby ensuring the durability of the wiper system connecting piece, extending its service life, and further reducing weight to reduce the load on the wiper motor.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A wiper system connecting piece, comprising three metal plates integrally connected in sequence and being straight, the three metal plates including two metal end plates parallel in the length direction and a metal intermediate plate with an arc transition connecting the two metal end plates, wherein the end of each metal end plate away from the metal intermediate plate is provided with a mounting through hole extending along its own thickness direction, characterized in that: The two ends of the metal intermediate plate and the two metal end plates are also integrally connected with reinforcing members.

2. The wiper system connecting piece according to claim 1, characterized in that: The reinforcing member includes reinforcing sheets spaced apart along the width direction of the two metal end plates.

3. The wiper system connecting piece according to claim 2, characterized in that: The reinforcing sheet includes an inner sheet and an outer sheet disposed on both sides of the metal intermediate plate.

4. The wiper system connecting piece according to claim 2 or 3, characterized in that: The outer circumferential edge of the reinforcing plate includes an intermediate wall integrally connected to the metal intermediate plate, an end wall integrally connected to the corresponding metal end plate, and an arc wall integrally connected to the arc connection between the corresponding metal end plate and the metal intermediate plate.

5. The wiper system connecting piece according to claim 1, characterized in that: The two metal end plates are also provided with weight-reducing recesses or weight-reducing through holes that are separated from the assembly through holes.

6. The wiper system connecting piece according to claim 5, characterized in that: The weight-reducing through holes are densely distributed on the corresponding metal end plates.

7. The wiper system connecting piece according to claim 5, characterized in that: The weight-reducing recess is a weight-reducing groove provided on the corresponding metal end plate.

8. The wiper system connecting piece according to claim 7, characterized in that: The weight reduction groove includes a first groove that is arranged side by side along the width direction of the corresponding metal end plate and extends along the length direction of the corresponding metal end plate. The first groove includes a constant depth section and a variable depth section that connects the two ends of the constant depth section. Both the constant depth section and the variable depth section extend along the length direction of the first groove. The groove depth of the constant depth section is fixed, and the groove depth of the variable depth section is negatively correlated with the distance between itself and the constant depth section.

9. The wiper system connecting piece according to claim 8, characterized in that: The weight reduction groove also includes a second groove arranged in a ring array on the outside of the assembly through hole and extending radially along the assembly through hole. The depth of the second groove is positively correlated with the distance between itself and the center line of the assembly through hole.

10. The wiper system connecting piece according to any one of claims 7-9, characterized in that: The weight-reducing grooves are distributed on both sides of the corresponding metal end plate.

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