Windscreen wiper connecting rod assembly

Abstract

The utility model discloses a windscreen wiper connecting rod assembly which comprises a metal plate, a swing arm shaft installed on the metal plate and a shaft sleeve arranged on the periphery of the swing arm shaft in a sleeved mode, an upper installation groove and a lower installation groove are formed in the inner side of the shaft sleeve, and an upper lining and a lower lining are embedded in the upper installation groove and the lower installation groove respectively. An upper sealing assembly is further included, and the upper sealing assembly comprises a sealing ring, a first wear-resisting fixed gasket, a wave-shaped elastic check ring, a first wear-resisting flat gasket, a waterproof cover and a wear-resisting flat gasket. The first wear-resisting fixed gasket is connected to the shaft sleeve and presses the sealing ring to the position, corresponding to the upper end of the upper lining, of the upper installation groove. The abrasion-resistant flat gasket, the waterproof cover, the first abrasion-resistant flat washer and the wave-shaped elastic check ring are sequentially arranged on the periphery of the swing arm shaft in a sleeving mode from top to bottom, the abrasion-resistant flat gasket is tightly attached to the lower end of the metal plate, and the wave-shaped elastic check ring is tightly attached to the upper end of the first abrasion-resistant flat washer. According to the utility model, the service life of the windscreen wiper can be effectively prolonged, and the working durability of each mechanism can reach more than 2 million times.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a wiper connecting rod assembly which increases the working life based on isolation and double sealing methods. Background Art

[0002] In the existing wiper linkage assembly, the swing arm shaft assembly and the shaft sleeve assembly are fixed by ordinary wear-resistant flat washers, shaft elastic retaining rings and corrugated elastic retaining rings, and the swing arm shaft assembly is waterproofed by a waterproof cover. It can meet the normal working requirements of the automotive industry after working in a cycle for 1.5 million times.

[0003] With the rapid development of the automobile industry, automobile manufacturers have put forward higher requirements on the service life of vehicle parts, especially large commercial vehicles, which are required to meet 2 million times, and some even require that they can still work normally after 2.5 million times.

[0004] The existing technology is no longer able to meet the requirements of the above-mentioned large commercial vehicles. As described above, the existing technology uses ordinary wear-resistant flat washers, shaft elastic retaining rings and corrugated elastic retaining rings to fix the swing arm assembly and the sleeve assembly. After more than 1.5 million times, the ordinary wear-resistant flat washer rubs against the bottom of the sleeve, which will cause a movement gap between the swing arm shaft and the sleeve, resulting in an excessive gap between the shaft and the sleeve, causing the swing arm assembly and the sleeve assembly to fail. The corrugated elastic retaining ring, the swing arm, and the sleeve wear at the same time to produce a movement gap, which also causes the arm assembly and the sleeve assembly to fail. Due to the large gap between the components, the waterproof cover cannot prevent the leakage of rainwater, resulting in water ingress hazards. Utility Model Content

[0005] The utility model aims to provide a wiper connecting rod assembly, which can effectively improve the service life of the wiper and make each mechanism work for more than 2 million times.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wiper connecting rod assembly, including a sheet metal, a swing arm shaft installed on the sheet metal, and a sleeve sleeved on the outer periphery of the swing arm shaft, wherein the inner side of the sleeve is respectively provided with an upper mounting groove and a lower mounting groove coaxial with the swing arm shaft at positions corresponding to the upper and lower ends, and an upper bushing and a lower bushing are respectively embedded in the upper mounting groove and the lower mounting groove; it also includes an upper sealing assembly, the upper sealing assembly includes a sealing ring, a first wear-resistant fixed washer, a corrugated elastic retaining ring, a first wear-resistant flat washer, a waterproof cover and a wear-resistant flat gasket, the first wear-resistant fixed washer is connected to the sleeve and presses the sealing ring to the position of the upper mounting groove corresponding to the upper end of the upper bushing, the wear-resistant flat gasket, the waterproof cover, the first wear-resistant flat washer and the corrugated elastic retaining ring are sequentially sleeved on the outer periphery of the swing arm shaft from top to bottom, and the wear-resistant flat gasket is arranged close to the lower end of the sheet metal, and the corrugated elastic retaining ring is arranged close to the upper end of the first wear-resistant fixed washer.

[0007] By adopting the above technical solution, a sealing ring is added in the gap between the shaft sleeve and the swing arm shaft, the waterproof ability is improved, and the service life is extended. The first wear-resistant fixed washer separates the direct movement friction between the corrugated elastic retaining ring and the shaft sleeve, and the first wear-resistant flat washer separates the movement friction and abnormal noise of the two parts of the corrugated elastic retaining ring and the waterproof cover and the swing arm shaft. The wear-resistant flat washer separates the movement friction of the swing arm shaft and the waterproof cover, preventing the three important parts of the swing arm shaft, the shaft sleeve, and the corrugated elastic retaining ring from direct contact. In this way, the movement gap between the swing arm shaft and the shaft sleeve and the fixed parts due to long-term wear and water ingress is avoided. It can be applied to various wiper linkage mechanism assemblies, so that the working durability of each mechanism can reach more than 2 million times.

[0008] The utility model is further configured such that a plurality of positioning grooves are provided at the upper end of the shaft sleeve, and a plurality of first positioning bends are provided at the outer periphery of the first wear-resistant fixed washer, the number of which is equal to the positioning grooves and extending downward, and the first positioning bends are inserted into the corresponding positioning grooves.

[0009] By adopting the above technical solution, the positioning installation of the first wear-resistant fixed washer can be achieved, the structure is simple and reliable, and the disassembly and assembly are very convenient.

[0010] The utility model is further configured such that an annular groove is provided at the upper end of the sleeve, the upper end of the waterproof cover is tightly abutted against the lower end of the wear-resistant flat gasket, and the inner edge of the upper end of the waterproof cover is fitted with the outer edge surface of the first wear-resistant flat gasket, the lower end of the waterproof cover is tightly abutted against the lower end of the annular groove, and an annular flange protruding inward is provided on the inner circular surface of the lower end of the waterproof cover, and the annular flange is tightly abutted against the outer circular surface of the sleeve.

[0011] By adopting the above technical solution, the waterproof cover can be positioned and installed. The waterproof cover covers the first wear-resistant fixed washer, the corrugated elastic retaining ring, the first wear-resistant flat washer and the wear-resistant flat gasket inside, thereby achieving dustproof and waterproof effects.

[0012] The utility model is further configured that the waterproof cover is made of PUR wear-resistant material.

[0013] By adopting the above technical solution, the waterproof cover of PUR material has its own lubrication effect, making the overall movement durability more stable and reliable.

[0014] The utility model is further configured to also include a lower limit assembly, which includes a second wear-resistant fixed washer, a second wear-resistant flat washer and an elastic retaining ring for the shaft, the second wear-resistant fixed washer is installed at the lower end of the sleeve, and the upper end of the second wear-resistant fixed washer is fit with the lower end of the lower sleeve, the second wear-resistant flat washer and the elastic retaining ring for the shaft are arranged in sequence from top to bottom at the lower end of the second wear-resistant fixed washer, and the outer periphery of the swing arm shaft is provided with an annular groove for the inner edge of the elastic retaining ring for the shaft to be clamped.

[0015] By adopting the above technical solution, the entire swing arm shaft and the shaft sleeve can be clamped and fixed, so as to prevent the important swing arm shaft and the shaft sleeve from rubbing against each other to produce movement gap and abnormal noise when they move against each other.

[0016] The utility model is further configured such that the outer periphery of the second wear-resistant fixed washer is provided with a plurality of second positioning bends extending upward, and the outer periphery of the sleeve is provided with a plurality of positioning planes for fitting with the corresponding second positioning bends to form circumferential limiting.

[0017] By adopting the above technical solution, the positioning installation of the second wear-resistant fixed washer can be achieved, the structure is simple and reliable, and the disassembly and assembly are very convenient.

[0018] The utility model is further configured such that the inner side of the first positioning bend is provided with a plurality of first anti-slip protrusions for pressing against the inner circular surface of the positioning groove, and the inner side of the second positioning bend is provided with a plurality of second anti-slip protrusions for pressing against the positioning plane.

[0019] By adopting the above technical solution, the installation firmness of the first wear-resistant fixing washer and the second wear-resistant fixing washer can be further improved.

[0020] The utility model is further configured such that the first wear-resistant fixed washer, the second wear-resistant fixed washer, the first wear-resistant flat washer, the second wear-resistant flat washer and the wear-resistant flat washer are all made of stainless steel.

[0021] By adopting the above technical solution, stainless steel is used, which has the advantage of being more wear-resistant and can increase the service life of various components.

[0022] The utility model is further configured that the upper bushing and the lower bushing are both copper-based bushings.

[0023] By adopting the above technical solution, the copper-based bushing is not easy to rust and is more wear-resistant, which can prevent water from entering the sleeve and causing rust and jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 A cross-sectional view of the utility model as a whole;

[0026] Figure 3 This is a schematic diagram of the disassembly structure of the first wear-resistant fixed washer of the utility model;

[0027] Figure 4 It is a schematic diagram of the disassembly structure of the second wear-resistant fixed washer of the utility model.

[0028] In the figure: 1, sheet metal; 2, swing arm shaft; 3, bushing; 4, upper mounting groove; 5, lower mounting groove; 6, upper bushing; 7, lower bushing; 8, sealing ring; 9, first wear-resistant fixed washer; 10, corrugated elastic retaining ring; 11, first wear-resistant flat washer; 12, waterproof cover; 13, wear-resistant flat gasket; 14, positioning groove; 15, first positioning bend; 16, annular groove; 17, annular flange; 18, second wear-resistant fixed washer; 19, second wear-resistant flat washer; 20, shaft elastic retaining ring; 21, annular groove; 22, second positioning bend; 23, positioning plane; 24, first anti-skid protrusion; 25, second anti-skid protrusion. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Example: As attached Figures 1 to 4The wiper connecting rod assembly shown in the figure includes a sheet metal 1, a swing arm shaft 2 installed on the sheet metal 1, and a sleeve 3 sleeved on the outer periphery of the swing arm shaft 2, wherein the inner side of the sleeve 3 is provided with an upper mounting groove 4 and a lower mounting groove 5 coaxial with the swing arm shaft 2 at positions corresponding to the upper and lower ends, and an upper bushing 6 and a lower bushing 7 are respectively embedded in the upper mounting groove 4 and the lower mounting groove 5; it also includes an upper sealing component, and the upper sealing component includes a sealing ring 8, a first wear-resistant fixed washer 9, a corrugated elastic retaining ring 10, a first wear-resistant flat washer 11, a waterproof cover 12 and a wear-resistant flat gasket 13, wherein the wear-resistant flat gasket The sheet 13 can be 0.3mm thick, the first wear-resistant flat washer 11 is 2mm thick, the first wear-resistant fixed washer 9 is connected to the shaft sleeve 3 and presses the sealing ring 8 to the position of the upper mounting groove 4 corresponding to the upper end of the upper bushing 6, the sealing ring 8 is an O-ring, the wear-resistant flat washer 13, the waterproof cover 12, the first wear-resistant flat washer 11 and the corrugated elastic retaining ring 10 are sequentially sleeved on the outer periphery of the swing arm shaft 2 from top to bottom, and the wear-resistant flat washer 13 is set close to the lower end of the sheet metal 1, and the corrugated elastic retaining ring 10 is set close to the upper end of the first wear-resistant fixed washer 9. Adding the sealing ring 8 in the gap between the shaft sleeve 3 and the swing arm shaft 2 improves the waterproof ability and prolongs the service life. The first wear-resistant fixed washer 9 separates the direct movement friction between the corrugated elastic circlip 10 and the shaft sleeve 3, and the first wear-resistant flat washer 11 separates the movement friction noise between the corrugated elastic circlip 10 and the two parts of the waterproof cover 12 and the swing arm shaft 2. The wear-resistant flat washer 13 separates the movement friction between the swing arm shaft 2 and the waterproof cover 12, preventing the three important parts of the swing arm shaft 2, the shaft sleeve 3, and the corrugated elastic circlip 10 from direct contact. In this way, the swing arm shaft 2 and the shaft sleeve 3 are prevented from having too large a movement gap with the fixed parts due to long-term wear and water ingress during operation, and can be applied to various wiper linkage mechanism assemblies, so that the working durability of each mechanism can reach more than 2 million times.

[0031] The upper end of the shaft sleeve 3 is provided with a plurality of positioning grooves 14, and the outer periphery of the first wear-resistant fixed washer 9 is provided with a plurality of first positioning bends 15 which are equal in number to the positioning grooves 14 and extend downward, and the first positioning bends 15 are inserted into the corresponding positioning grooves 14. This design can realize the positioning installation of the first wear-resistant fixed washer 9, and the structure is simple and reliable, and the disassembly and assembly are very convenient.

[0032] More specifically, the upper end of the shaft sleeve 3 is provided with an annular groove 16, the upper end of the waterproof cover 12 is tightly against the lower end of the wear-resistant flat gasket 13, and the inner edge of the upper end of the waterproof cover 12 is in contact with the outer edge of the first wear-resistant flat gasket 11, the lower end of the waterproof cover 12 is tightly against the lower end of the annular groove 16, and the inner circumferential surface of the lower end of the waterproof cover 12 is provided with an annular flange 17 protruding inward, and the annular flange 17 is tightly against the outer circumferential surface of the shaft sleeve 3. This design can realize the positioning and installation of the waterproof cover 12. The waterproof cover 12 covers the first wear-resistant fixed gasket 9, the corrugated elastic retaining ring 10, the first wear-resistant flat gasket 11 and the wear-resistant flat gasket 13 inside, which plays a role in dustproof and waterproof. In addition, the O-ring arranged below prevents the risk of accidental water seepage in the shaft sleeve 3, and the two form a double sealing structure.

[0033] As attached Figure 3 As shown, the waterproof cover 12 is made of PUR wear-resistant material, and the middle section of the waterproof cover 12 is in a C-shaped shape that bulges outward. An appropriate amount of lithium-based grease is added between the swing arm shaft 2 and the sleeve 3. The waterproof cover 12 made of PUR material has a self-lubricating effect, making the overall movement durability more stable and reliable.

[0034] It also includes a lower limit assembly, which includes a second wear-resistant fixed washer 18, a second wear-resistant flat washer 19 and a shaft elastic circlip 20. The second wear-resistant fixed washer 18 is installed at the lower end of the sleeve 3, and the upper end of the second wear-resistant fixed washer 18 fits with the lower end of the lower bushing 7. The second wear-resistant flat washer 19 and the shaft elastic circlip 20 are arranged at the lower end of the second wear-resistant fixed washer 18 from top to bottom, and the outer periphery of the swing arm shaft 2 is provided with an annular groove 21 for the inner edge of the shaft elastic circlip 20 to be clamped. This design can clamp and fix the entire swing arm shaft 2 and the sleeve 3 to prevent the important swing arm shaft 2 and the sleeve 3 from rubbing against each other to produce movement gap and abnormal sound. In addition, the second wear-resistant fixed washer 18 separates the direct movement friction between the second wear-resistant flat washer 19 and the sleeve 3.

[0035] The outer periphery of the second wear-resistant fixed washer 18 is provided with a plurality of second positioning bends 22 extending upward, and the outer periphery of the sleeve 3 is provided with a plurality of positioning planes 23 for forming circumferential limit by fitting with the corresponding second positioning bends 22. This design can realize the positioning installation of the second wear-resistant fixed washer 18, has a simple and reliable structure, and is very convenient for disassembly and assembly.

[0036] In addition, the inner side of the first positioning bend 15 is provided with a plurality of first anti-skid protrusions 24 for pressing against the inner circular surface of the positioning groove 14, and the inner side of the second positioning bend 22 is provided with a plurality of second anti-skid protrusions 25 for pressing against the positioning plane 23. The first anti-skid protrusions 24 and the second anti-skid protrusions 25 can be designed to be conical. This design can further enhance the firmness of the installation of the first wear-resistant fixing washer 9 and the second wear-resistant fixing washer 18.

[0037] The first wear-resistant fixed washer 9, the second wear-resistant fixed washer 18, the first wear-resistant flat washer 11, the second wear-resistant flat washer 19 and the wear-resistant flat washer 13 are all made of stainless steel, which has the advantage of being more wear-resistant and can increase the service life of each component.

[0038] The upper bushing 6 and the lower bushing 7 are both copper-based bushings, which are not easy to rust and are more wear-resistant, and can prevent the shaft sleeve 3 from getting rusted and stuck due to water ingress.

Claims

1. A wiper connecting rod assembly, comprising a sheet metal (1), a swing arm shaft (2) mounted on the sheet metal (1), and a sleeve (3) sleeved on the outer periphery of the swing arm shaft (2), wherein an upper mounting groove (4) and a lower mounting groove (5) coaxial with the swing arm shaft (2) are respectively provided at positions corresponding to upper and lower ends of the inner side of the sleeve (3), and an upper bushing (6) and a lower bushing (7) are respectively embedded in the upper mounting groove (4) and the lower mounting groove (5); the characteristics are: The invention also comprises an upper sealing assembly, which comprises a sealing ring (8), a first wear-resistant fixed gasket (9), a corrugated elastic retaining ring (10), a first wear-resistant flat gasket (11), a waterproof cover (12) and a wear-resistant flat gasket (13). The first wear-resistant fixed gasket (9) is connected to the shaft sleeve (3) and presses the sealing ring (8) to a position of the upper mounting groove (4) corresponding to the upper end of the upper bushing (6). The wear-resistant flat gasket (13), the waterproof cover (12), the first wear-resistant flat gasket (11) and the corrugated elastic retaining ring (10) are sequentially sleeved on the outer periphery of the swing arm shaft (2) from top to bottom, and the wear-resistant flat gasket (13) is arranged in close contact with the lower end of the sheet metal (1), and the corrugated elastic retaining ring (10) is arranged in close contact with the upper end of the first wear-resistant fixed gasket (9).

2. A wiper linkage assembly according to claim 1, characterized in that: The upper end of the shaft sleeve (3) is provided with a plurality of positioning grooves (14), and the outer periphery of the first wear-resistant fixed washer (9) is provided with a plurality of first positioning bends (15) whose number is equal to the positioning grooves (14) and which extend downward, and the first positioning bends (15) are inserted into the corresponding positioning grooves (14).

3. The wiper linkage assembly according to claim 1, characterized in that: The upper end of the shaft sleeve (3) is provided with an annular groove (16), the upper end of the waterproof cover (12) is tightly abutted against the lower end of the wear-resistant flat gasket (13), and the inner edge of the upper end of the waterproof cover (12) is in contact with the outer edge of the first wear-resistant flat gasket (11), the lower end of the waterproof cover (12) is tightly abutted against the lower end of the annular groove (16), and an annular flange (17) protruding inwardly is provided on the inner circumferential surface of the lower end of the waterproof cover (12), and the annular flange (17) is tightly abutted against the outer circumferential surface of the shaft sleeve (3).

4. A wiper linkage assembly according to claim 3, characterized in that: The waterproof cover (12) is made of PUR wear-resistant material.

5. The wiper linkage assembly according to claim 2, characterized in that: The invention also comprises a lower limit assembly, which comprises a second wear-resistant fixed washer (18), a second wear-resistant flat washer (19) and a shaft elastic retaining ring (20), wherein the second wear-resistant fixed washer (18) is mounted on the lower end of the shaft sleeve (3), and the upper end of the second wear-resistant fixed washer (18) is in contact with the lower end of the lower bushing (7), the second wear-resistant flat washer (19) and the shaft elastic retaining ring (20) are arranged in sequence from top to bottom on the lower end of the second wear-resistant fixed washer (18), and the outer periphery of the swing arm shaft (2) is provided with an annular groove (21) for the inner edge of the shaft elastic retaining ring (20) to be clamped.

6. A wiper linkage assembly according to claim 5, characterized in that: The outer periphery of the second wear-resistant fixed washer (18) is provided with a plurality of second positioning bends (22) extending upward, and the outer periphery of the shaft sleeve (3) is provided with a plurality of positioning planes (23) for fitting with the corresponding second positioning bends (22) to form circumferential limiting.

7. A wiper linkage assembly according to claim 6, characterized in that: The inner side of the first positioning bend (15) is provided with a plurality of first anti-slip protrusions (24) for pressing against the inner circular surface of the positioning groove (14), and the inner side of the second positioning bend (22) is provided with a plurality of second anti-slip protrusions (25) for pressing against the positioning plane (23).

8. The wiper linkage assembly according to claim 5, characterized in that: The first wear-resistant fixed washer (9), the second wear-resistant fixed washer (18), the first wear-resistant flat washer (11), the second wear-resistant flat washer (19) and the wear-resistant flat washer (13) are all made of stainless steel.

9. The wiper linkage assembly according to claim 1, characterized in that: The upper bushing (6) and the lower bushing (7) are both copper-based bushings.

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