Connecting structure of wiping arm and wiping blade of automobile windscreen wiper and mounting mode
By combining insert injection molding process and guide positioning structure, the problems of multiple parts, heavy weight and corrosion in the existing connection structure of automobile wiper arm and wiper blade are solved, realizing convenient disassembly and assembly and vehicle weight reduction, and improving the fatigue strength and service life of the connection parts.
Patent Information
- Application Number
- CN202610219140.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-24
- Publication Date
- 2026-04-10
AI Technical Summary
The existing connection structure between the wiper arm and the wiper blade of a car has a large number of parts, is heavy, has a complex manufacturing process, and suffers from problems such as paint damage and corrosion on the wiper arm connector, making it difficult to achieve overall vehicle lightweighting and reduce maintenance costs.
The spring and scraper connector are integrated into a single structure using an insert injection molding process. The scraper arm and scraper are fixed by plugging and unplugging through a guide structure and a locking mechanism, eliminating the need for a separate scraper arm connector and reducing the number of parts and riveting processes.
It enables convenient disassembly and assembly of the scraper arm and scraper blade, reduces maintenance costs and operational difficulty, improves the fatigue resistance of the connection parts and the overall vehicle lightweighting effect, and extends service life.
Smart Images
Figure CN121822364A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of automobiles, and particularly relates to a connecting structure and mounting mode of a wiper arm and a wiper blade of an automobile wiper. BACKGROUND
[0002] At present, a common connecting structure of a wiper arm and a wiper blade in the industry is that the wiper arm is split into a wiper rod and a wiper arm connecting piece, the wiper rod and the wiper arm connecting piece are fixedly connected through riveting, the wiper arm connecting piece forms a cavity, a wiper blade connector is inserted into the cavity of the wiper arm connecting piece, and is fixed through multiple structure clamping, the number of parts is large, the weight is heavy, the manufacturing process is complex, the manufacturing precision of the parts is high, and the on-site management requirements are high and the cost is high.
[0003] In the prior art, the wiper arm connecting piece must be a metal piece with a black paint coating, but it is an exposed structure, and there are problems such as damage and rust of the paint surface of the wiper arm connecting piece in the life cycle of the automobile, high cost of overall replacement of the wiper arm, and difficulty in replacement, and meanwhile, the number of mounting parts is large, the weight is heavy, the processing technology is complex, the manufacturing precision of the parts is high, and it is not conducive to the lightweight design of the vehicle with fewer parts.
[0004] Therefore, the application provides a connecting structure and mounting mode of a wiper arm and a wiper blade of an automobile wiper. SUMMARY
[0005] To solve the above problems, the application provides a connecting structure and mounting mode of a wiper arm and a wiper blade of an automobile wiper, which can solve the problems of damage and rust of the paint surface of the wiper arm during use of the automobile, avoid high cost of overall replacement of the wiper arm and difficulty in replacement, reduce the number of parts, simplify the manufacturing process, reduce the cost of each link, and improve the lightweight of the vehicle.
[0006] A connecting structure of a wiper arm and a wiper blade of an automobile wiper, comprising a wiper arm and a wiper blade; the wiper arm comprises a main arm rod and a secondary arm rod; the secondary arm rod is arranged on the end portion of the main arm rod; the wiper blade comprises a wiper blade seat and a wiper blade connector; the wiper blade connector is mounted on the wiper blade seat through a mounting structure; the wiper blade connector is in the shape of an inverted U, one end of the wiper blade connector is in an open state, the other end of the wiper blade connector is in a closed state, a pair of elastic pieces are arranged on the inner walls of the two sides of the wiper blade connector, and the elastic pieces are fixedly combined with the wiper blade connector through injection molding; the end portion of the secondary arm rod is inserted between the inner wall surface of the wiper blade connector and the elastic pieces through a guide structure, and is fixed through a clamping structure.
[0007] Preferably, the mounting structure comprises a wiper blade seat rotating shaft and a rotating shaft assembly hole; the wiper blade seat rotating shaft is fixedly connected to the two sides of the wiper blade seat; the rotating shaft assembly hole is arranged on the side wall of the wiper blade connector; and the wiper blade seat rotating shaft is assembled in the rotating shaft assembly hole.
[0008] Preferably, the elastic pieces are made of metal material; and the wiper blade connector is made of weather-resistant plastic material.
[0009] Preferably, the elastic sheet is embedded into the plastic base of the wiper connector as an insert to form an integrated structure.
[0010] The elastic sheet is fixed by injection molding with the wiper connector, the wiper seat shaft of the wiper seat is assembled into the shaft assembly hole of the wiper connector, and the assembly of the wiper is completed. The "insert injection molding process" is adopted, that is, the elastic sheet is directly embedded into the wiper connector during the injection molding process as a prefabricated insert, so that the elastic sheet and the plastic base of the wiper connector form an integrated structure, rather than subsequent assembly and fixation. The elastic sheet is made of metal material and needs to be pre-processed into a shape suitable for the cavity of the wiper connector. The surface can be treated to prevent rust to ensure the stability of the combination with the plastic base. A special positioning structure (such as a clamping groove or a boss) is arranged in the injection mold of the wiper connector to accurately fix the pre-processed elastic sheet at the preset position of the mold cavity, preventing the elastic sheet from shifting during injection molding. The above injection molding is a prior art and will not be described in detail.
[0011] The integrated structure reduces the subsequent assembly process (replaces the riveting and clamping of the prior art), reduces the number of parts, and meets the design goal of "fewer parts and lighter weight". The elastic sheet is wrapped by the plastic base of the wiper connector, which can avoid the rust problem caused by direct exposure of the metal elastic sheet.
[0012] Preferably, the clamping structure includes a limiting boss and a limiting hole; the wiper connector has a limiting hole at the top end; and the sub-arm rod has a limiting boss fixed on the top surface.
[0013] Preferably, the limiting boss is a right triangle in cross section, and the right angle of the limiting boss is inclined towards the front end of the sub-arm rod; and the top view of the limiting hole is a square.
[0014] Preferably, the guide structure includes an inclined guide surface; and the end of the sub-arm rod is provided with an inclined guide surface on both sides.
[0015] Preferably, the elastic sheet is composed of a pair of fixed ends and an elastic cantilever end, the elastic cantilever end is provided with a fixed end on both sides; a pair of fixed ends are injection molded with the inner walls of the wiper connector; the elastic cantilever end is a wedge-shaped clamping platform, and the elastic cantilever end is bent as a whole with a small arc; and the horizontal plane of the elastic cantilever end and the inner wall surface of the wiper connector form an insertion channel of the end of the sub-arm rod.
[0016] Preferably, the sub-arm rod and the limiting boss are integrally injection molded.
[0017] The hand-held auxiliary arm rod is aligned with the opening of the wiper blade connector, and the front end of the auxiliary arm rod is smoothly pushed into the cavity of the wiper blade connector along the inclined guide surface of the guide structure; the wiper blade is continuously pushed until the limiting boss is attached to the inner wall surface of the wiper blade connector, at this time the elastic cantilever end of the elastic sheet is deformed by being extruded by the auxiliary arm rod, when the limiting boss reaches the limiting hole, the elastic sheet is elastically reset, and the limiting boss is clamped into the limiting hole; the inner wall surface of the wiper blade connector limits the Y-direction and Z-direction movement of the auxiliary arm rod, the clamping of the limiting boss and the limiting hole limits the X-direction (insertion and extraction direction) displacement, and the installation is completed; the inclined guide surface can avoid deviation when the auxiliary arm rod is inserted, and ensures that the limiting hole is accurately aligned with the position of the elastic cantilever end of the elastic sheet; the auxiliary arm rod cannot be easily pulled out, that is, the installation is in place, by gently pulling the auxiliary arm rod, and confirming that there is no looseness or shaking; the whole process does not need additional fixing parts such as bolts and buckles, and can be completed by one person with bare hands, and the time consumption is ≤30 seconds.
[0018] The wiper blade is held fixed, the limiting boss is pressed inward by fingers or a simple tool such as a fingernail or a plastic pry sheet to make the elastic sheet elastically deform, the X-direction limiting lock of the auxiliary arm rod is released, the pressing force only needs to overcome the elasticity of the elastic sheet, without violent operation, the elastic pressing device of the elastic sheet is maintained, the wiper blade is pulled in the opposite direction, the auxiliary arm rod gradually exits the cavity of the wiper blade connector along the inclined guide surface of the wiper blade, at this time the elastic sheet is automatically reset to the initial state, and the disassembly is completed.
[0019] Without professional tools and complex steps, the user can complete the disassembly and assembly by himself, solving the problem of difficult replacement in the prior art; the disassembly and assembly process only relies on the elastic deformation of the elastic sheet, and the components are not worn or consumed, and can be repeatedly used; one person can operate with bare hands, and the total time consumption is ≤1 minute, which is much better than the complex process of disassembling the riveted parts and replacing the whole in the prior art.
[0020] The elastic sheet is embedded in the wiper blade connector made of plastic material by injection molding, and the exposed part is only weather-resistant plastic without metal exposure, which eliminates the risk of rust and paint peeling from the structure, and is suitable for a use cycle of more than 5 years; the wiper arm and the wiper blade are fixed by plug-in clamping, which is convenient to disassemble and assemble, and if subsequent maintenance is required, only the wiper blade or the wiper arm needs to be replaced, without the need to replace the whole, which greatly reduces the user maintenance cost and operation difficulty; the application cancels the independent wiper arm connector, directly connects through the integrated structure of the elastic sheet and the wiper blade connector, reduces the number of parts and one riveting process, reduces the part management cost and assembly complexity in the production process, and eliminates the wiper arm connector made of metal material, and the elastic sheet adopts a thin metal base material (embedded in plastic without additional protection structure), the overall weight is significantly reduced compared with the prior art, which meets the lightweight design goal of the whole vehicle, and helps to improve the fuel economy of the vehicle or the cruising range of the new energy vehicle; The guiding structure and the clamping mechanism of the application cooperate to realize limiting, the structure is simple, the fault tolerance is higher, the requirement for part machining precision is reduced, and the waste rate in the production process is reduced; the elastic sheet is embedded in the wiper connector through injection molding to form an integrated force structure, compared with the multi-part clamping of the prior art, the force transmission is more direct and uniform, the fatigue resistance of the connection part is improved, and abnormal wiping problems caused by structure loosening during long-term use are avoided.
[0021] Preferably, an installation method of a wiper arm and a wiper blade of an automobile wiper, the installation method adopts the wiper arm and wiper blade connecting structure, and the installation method steps are as follows: S1: the elastic sheet is embedded as an insert, combined and fixed with the wiper connector through an injection molding process to form an integrated structure; S2: the wiper blade seat shaft of the wiper blade seat is assembled into the shaft assembly hole of the wiper connector to complete assembly of the wiper blade; S3: the front end of the sub-arm rod is inserted between the inner wall surface of the wiper connector and the horizontal surface of the elastic cantilever end of the elastic sheet through the guiding structure of the sub-arm rod, then the limiting boss is clamped into the limiting hole to realize limiting and fixing of the sub-arm rod in X, Y and Z directions, and installation of the wiper arm and the wiper blade is completed.
[0022] Compared with the prior art, the application has the following advantages: The elastic sheet is embedded in the wiper connector made of plastic material through injection molding, and only weather-resistant plastic is exposed, without metal exposure, which eliminates the risk of rust and paint peeling from the structure, and adapts to a use cycle of more than 10 years of the automobile; the wiper arm and the wiper blade are fixed through plug-in clamping, which is convenient to disassemble and assemble, and if subsequent maintenance is needed, only the wiper blade or the wiper arm needs to be replaced, without the need for overall replacement, which greatly reduces user maintenance cost and operation difficulty; the application cancels the independent wiper arm connecting piece, directly realizes connection through the integrated structure of the elastic sheet and the wiper connector, reduces the number of parts and a riveting process, reduces the part management cost and assembly complexity in the production process, and removes the wiper arm connecting piece made of metal material, and the elastic sheet adopts a thin metal base material (embedded in plastic without additional protection structure), the overall weight is significantly reduced compared with the prior art, which meets the lightweight design goal of the whole vehicle and helps to improve the fuel economy of the vehicle or the cruising range of the new energy vehicle; The guiding structure and the clamping mechanism of the application cooperate to realize limiting, the structure is simple, the fault tolerance is higher, the requirement for part machining precision is reduced, and the waste rate in the production process is reduced; the elastic sheet is embedded in the wiper connector through injection molding to form an integrated force structure, compared with the multi-part clamping of the prior art, the force transmission is more direct and uniform, the fatigue resistance of the connection part is improved, and abnormal wiping problems caused by structure loosening during long-term use are avoided.
[0023] Other features and advantages of the present application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the application. The purposes and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0025] Figure 1 A schematic view of a connection structure of a wiper arm and a wiper blade of a car wiper is shown; Figure 2 A schematic view of a wiper arm is shown; Figure 3 A schematic view of a wiper blade is shown; Figure 4 A sectional view of a wiper blade is shown; Figure 5 A schematic view of a wiper blade connector is shown; Figure 6 An exploded view of a wiper blade is shown; Figure 7 A bottom view of a wiper blade connector is shown; Figure 8 A schematic view of a spring plate is shown; Figure 9 A schematic view of a sub-arm rod is shown; Figure 10 A schematic view of a sub-arm rod without installation is shown; Figure 11 A schematic view of a sub-arm rod installation process is shown; Figure 12 A schematic view of a sub-arm rod after installation is shown.
[0026] Legend: 1, wiper arm; 2, main arm rod; 3, sub-arm rod; 4, wiper blade; 5, wiper blade seat; 6, wiper blade seat rotating shaft; 7, wiper blade connector; 8, rotating shaft assembly hole; 9, spring plate; 10, fixed end; 11, elastic cantilever end; 12, limiting boss; 13, limiting hole; 14, inclined guide surface. DETAILED DESCRIPTION
[0027] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.
[0028] A connecting structure of a wiper arm and a wiper blade of an automobile wiper, comprising a wiper arm 1 and a wiper blade 4; the wiper arm 1 comprises a main arm rod 2 and a sub-arm rod 3; the sub-arm rod 3 is arranged on the end of the main arm rod 2; the wiper blade 4 comprises a wiper blade seat 5 and a wiper blade connector 7; the wiper blade connector 7 is mounted on the wiper blade seat 5 through a mounting structure; the wiper blade connector 7 is in the shape of an inverted U, one end of the wiper blade connector 7 is in an open state, the other end of the wiper blade connector 7 is in a closed state, and a pair of elastic pieces 9 are arranged on the inner walls of the two sides of the wiper blade connector 7, and the elastic pieces 9 are fixed with the wiper blade connector 7 through injection molding; the end of the sub-arm rod 3 is inserted between the inner wall surface of the wiper blade connector 7 and the elastic pieces 9 through a guide structure, and is fixed through a clamping structure; The mounting structure comprises a wiper blade seat rotating shaft 6 and a rotating shaft assembly hole 8; the wiper blade seat 5 is fixed with the wiper blade seat rotating shaft 6 on both sides; the rotating shaft assembly hole 8 is arranged on the side wall of the wiper blade connector 7 on both sides; and the wiper blade seat rotating shaft 6 is assembled in the rotating shaft assembly hole 8; The elastic pieces 9 are made of metal; and the wiper blade connector 7 is made of weather-resistant plastic; The elastic pieces 9 are embedded in the plastic matrix of the wiper blade connector 7 as inserts to form an integrated structure; As shown in the drawings, Figures 1-8 the elastic pieces 9 are fixed with the wiper blade connector 7 through injection molding as inserts, the wiper blade seat rotating shaft 6 of the wiper blade seat 5 is assembled into the rotating shaft assembly hole 8 of the wiper blade connector 7, and the assembly of the wiper blade 4 is completed; The "insert injection molding process" is adopted, that is, the elastic pieces 9 are directly embedded in the inside of the wiper blade connector 7 as prefabricated inserts in the injection molding process of the wiper blade connector 7, so that the elastic pieces 9 and the plastic matrix of the wiper blade connector 7 form an integrated structure, instead of subsequent assembly and fixation; The elastic pieces 9 are made of metal and need to be pre-processed into a shape suitable for the cavity of the wiper blade connector 7, and the surface can be treated to prevent rust to ensure the stability of the combination with the plastic matrix; a special positioning structure (such as a clamping groove or a boss) is arranged in the injection mold of the wiper blade connector 7 to accurately fix the pre-processed elastic pieces 9 at the preset position of the mold cavity to prevent the elastic pieces 9 from shifting during the injection molding process. The above injection molding is a prior art and will not be described in detail.
[0029] The integrated structure reduces subsequent assembly process (instead of riveting and clamping in the prior art), reduces the number of parts, and meets the design goal of "fewer parts and lighter weight"; The elastic sheet 9 is wrapped by the plastic base of the wiper connector 7, which can avoid rust caused by direct exposure of the metal elastic sheet 9.
[0030] The clamping structure includes a limiting boss 12 and a limiting hole 13; the wiper connector 7 has a limiting hole 13 at the top end; the limiting boss 12 is fixed to the top surface of the auxiliary arm rod 3; The limiting boss 12 is a right triangle in cross section, and the right angle of the limiting boss 12 is directed to the front end of the auxiliary arm rod 3; the top view of the limiting hole 13 is a square; The guide structure includes an inclined guide surface 14; the end of the auxiliary arm rod 3 has an inclined guide surface 14 on both sides; The elastic sheet 9 is composed of a pair of fixed ends 10 and an elastic cantilever end 11; the elastic cantilever end 11 has a fixed end 10 on both sides; a pair of fixed ends 10 are injection molded with the inner walls of the wiper connector 7 on both sides; the elastic cantilever end 11 is a wedge-shaped clamping platform, and the whole elastic cantilever end 11 is bent at a small arc; the horizontal plane of the elastic cantilever end 11 and the inner wall surface of the wiper connector 7 form an insertion channel for the end of the auxiliary arm rod 3; The auxiliary arm rod 3 and the limiting boss 12 are integrally injection molded; As shown in Figures 1-5 and Figures 9-12 hold the auxiliary arm rod 3, align the opening of the wiper connector 7, and smoothly push the front end of the auxiliary arm rod 3 into the cavity inside the wiper connector 7 along the inclined guide surface 14 of the guide structure; continue to push the wiper 4 until the limiting boss 12 is in close contact with the inner wall surface of the wiper connector 7; at this time, the elastic cantilever end 11 of the elastic sheet 9 is deformed under the extrusion of the auxiliary arm rod 3; when the limiting boss 12 reaches the limiting hole 13, the elastic sheet 9 returns to its original shape, allowing the limiting boss 12 to be clamped into the limiting hole 13; the inner wall surface of the wiper connector 7 restricts the Y and Z direction movement of the auxiliary arm rod 3, and the clamping of the limiting boss 12 and the limiting hole 13 restricts the X direction (insertion and extraction direction) displacement, completing the installation, as shown in Figure 1 The inclined guide surface 14 can prevent the auxiliary arm rod 3 from deviating during insertion, ensuring that the limiting hole 13 is accurately aligned with the position of the elastic cantilever end 11 of the elastic sheet 9; gently pull the auxiliary arm rod 3 to confirm that there is no looseness or shaking, and the auxiliary arm rod 3 cannot be easily pulled out, indicating that the installation is complete; the whole process does not require additional fixing parts such as bolts and buckles, and can be completed by one person with bare hands in ≤30 seconds.
[0031] The handheld blade 4 is kept fixed, and the limiting boss 12 is pressed by fingers or a simple tool such as a fingernail or a plastic pick to press the spring piece 9 inward, so that the spring piece 9 is elastically deformed to release the locking of the auxiliary arm 3X, and the pressing force only needs to overcome the elasticity of the spring piece 9, without violent operation. The elastic pressing device of the spring piece 9 is kept, and the blade 4 is pulled in the opposite direction to make the auxiliary arm 3 gradually exit the cavity of the blade connector 7 along the inclined guide surface 14 of the blade, at this time the spring piece 9 is automatically reset to the initial state, and the disassembly is completed.
[0032] Without professional tools and complex steps, the user can complete the disassembly and assembly by himself, solving the problem of difficult replacement in the prior art; the disassembly and assembly process only relies on the elastic deformation of the spring piece 9, and the components are not worn and consumed, and can be repeatedly used; single-handed operation, the total time of disassembly and assembly is ≤1 minute, which is much better than the complex process of disassembling the riveted parts and replacing the whole in the prior art.
[0033] The spring piece 9 is embedded in the blade connector 7 made of plastic material by injection molding, and the exposed part is only weather-resistant plastic without metal exposure, which eliminates the risk of rust and paint peeling from the structure, and is suitable for a use cycle of more than 10 years of a car; the blade arm 1 and the blade 4 are fixed by plug-in clamping, which is convenient to disassemble and assemble, and if subsequent maintenance is required, only the blade 4 or the blade arm 1 needs to be replaced without the need for overall replacement, which greatly reduces the user's maintenance cost and operation difficulty; the application cancels the independent blade arm 1 connector, and directly realizes connection through the integrated structure of the spring piece 9 and the blade connector 7, reduces the number of parts and a riveting process, reduces the part management cost and assembly complexity in the production process, and eliminates the metal blade arm 1 connector, and the spring piece 9 adopts a thin metal base material (embedded in plastic without additional protection structure), which significantly reduces the overall weight compared with the prior art, meets the lightweight design goal of the whole vehicle, and helps to improve the fuel economy of the vehicle or the cruising range of the new energy vehicle; The guiding structure and the clamping mechanism of the application cooperate to realize limiting, which is simple in structure and has a higher fault tolerance, reduces the requirement for the machining precision of the parts, and reduces the waste rate in the production process; the spring piece 9 is embedded in the blade connector 7 by injection molding to form an integrated force structure, which is more direct and uniform in force transmission compared with the multi-part clamping of the prior art, improves the fatigue resistance of the connection part, and avoids the problem of abnormal wiping caused by structural loosening during long-term use.
[0034] An installation method of a blade arm and a blade of an automobile wiper, which adopts the above-mentioned connecting structure of the blade arm and the blade of the automobile wiper, and the steps of the installation method are as follows: S1: The spring piece 9 is embedded as an insert, combined and fixed with the blade connector 7 by an injection molding process to form an integrated structure; S2: The blade seat shaft 6 of the blade seat 5 is assembled into the shaft assembly hole 8 of the blade connector 7 to complete the assembly of the blade 4. S3: through the guide structure of the auxiliary arm rod 3, the front end of the auxiliary arm rod 3 is inserted between the inner wall surface of the wiper connector 7 and the horizontal surface of the elastic cantilever end 11 of the elastic sheet 9, and then the limiting boss 12 is clamped into the limiting hole 13, so as to realize the limiting and fixing of the auxiliary arm rod 3 in the X direction, the Y direction and the Z direction, and complete the installation of the wiper arm 1 and the wiper 4.
[0035] Working principle: the elastic sheet 9 is combined and fixed with the wiper connector 7 through injection molding, the wiper seat shaft 6 of the wiper seat 5 is assembled into the shaft assembly hole 8 of the wiper connector 7, and the assembly of the wiper 4 is completed; holding the auxiliary arm rod 3, aligning the opening of the wiper connector 7, along the inclined guide surface 14 of the guide structure, the front end of the auxiliary arm rod 3 is smoothly pushed into the cavity inside the wiper connector 7; continue to push the wiper 4 until the limiting boss 12 is in close contact with the inner wall surface of the wiper connector 7, at this time the elastic cantilever end 11 of the elastic sheet 9 is deformed by being extruded by the auxiliary arm rod 3, when the limiting boss 12 reaches the limiting hole 13, the elastic sheet 9 is elastically reset, and the limiting boss 12 is clamped into the limiting hole 13; the inner wall surface of the wiper connector 7 limits the Y direction and Z direction movement of the auxiliary arm rod 3, the clamping of the limiting boss 12 and the limiting hole 13 limits the X direction (insertion and extraction direction) displacement, and the installation is completed, as shown in Figure 1 The inclined guide surface 14 can avoid deviation when the auxiliary arm rod 3 is inserted, and ensure that the limiting hole 13 is accurately aligned with the position of the elastic cantilever end 11 of the elastic sheet 9; gently pull the auxiliary arm rod 3 to confirm that there is no looseness and shaking, and the auxiliary arm rod 3 cannot be easily pulled out, that is, the installation is in place; the whole process does not need additional fixing parts such as bolts and buckles, and a single person can complete it by hand, and the time consumption is ≤30 seconds; holding the wiper 4 fixed, press the limiting boss 12 with fingers or simple tools (such as nails and plastic prying sheets, to avoid scratching the parts) to press the elastic sheet 9 inward, so that it is elastically deformed, the X direction limiting lock of the auxiliary arm rod 3 is released, the pressing force only needs to overcome the elastic sheet 9, and violent operation is not needed, the elastic pressure device of the elastic sheet 9 is maintained, and the wiper 4 is pulled in the opposite direction, so that the auxiliary arm rod 3 gradually exits the cavity of the wiper connector 7 along the inclined guide surface 14 of the wiper rod, at this time the elastic sheet 9 will automatically reset to the initial state, and the disassembly is completed.
[0036] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A wiper arm and blade connection structure for an automotive wiper, characterized by: The utility model provides a kind of installation mode of squeegee, including squeegee arm (1) and squeegee blade (4);The squeegee arm (1) includes main arm rod (2) and auxiliary arm rod (3);The auxiliary arm rod (3) is arranged on the end of main arm rod (2);The squeegee blade (4) includes squeegee seat (5) and squeegee connector (7);The squeegee connector (7) is mounted on squeegee seat (5) by mounting structure;The squeegee connector (7) is inverted U shape, and squeegee connector (7) one end is open state, and squeegee connector (7) other end is closed state, and squeegee connector (7) both sides inner wall is equipped with a pair of elastic sheet (9), and elastic sheet (9) is combined and fixed with squeegee connector (7) by injection molding;The end of auxiliary arm rod (3) is inserted between the inner wall surface of squeegee connector (7) and elastic sheet (9) by guide structure, and is fixed by clamping structure.
2. The connecting structure of the wiper arm and the wiper blade of the automobile wiper according to claim 1, characterized in that: The mounting structure includes squeegee seat pivot (6) and pivot assembly hole (8);Squeegee seat (5) both sides are fixed with squeegee seat pivot (6);Squeegee connector (7) both sides side wall is equipped with pivot assembly hole (8);Squeegee seat pivot (6) is assembled in pivot assembly hole (8).
3. The wiper arm and blade coupling structure of claim 2, wherein: The elastic sheet (9) is of metal material;The squeegee connector (7) is of weather-resistant plastic material.
4. The wiper arm and blade coupling structure of claim 2, wherein: The elastic sheet (9) is embedded in the plastic matrix of the squeegee connector (7) as an insert, forming an integrated structure.
5. The wiper arm and blade coupling structure of claim 1, wherein: The clamping structure includes limiting boss (12) and limiting hole (13);The top end of squeegee connector (7) is provided with limiting hole (13);The top surface of auxiliary arm rod (3) is fixed with limiting boss (12).
6. The wiper arm and blade coupling structure of claim 5, wherein: The limiting boss (12) is a right triangle in cross section, and the right angle of the limiting boss (12) is inclined towards the front end of the auxiliary arm rod (3);The top view of the limiting hole (13) is square.
7. The wiper arm and blade coupling structure of claim 6, wherein: The guide structure includes an inclined guide surface (14);The end of the auxiliary arm rod (3) is provided with an inclined guide surface (14) on both sides.
8. The wiper arm and blade coupling structure of claim 3, wherein: The elastic sheet (9) is composed of a pair of fixed ends (10) and elastic cantilever ends (11), and the elastic cantilever ends (11) are provided with fixed ends (10) on both sides;A pair of fixed ends (10) are injection molded with the inner walls of the squeegee connector (7) on both sides, and the elastic cantilever ends (11) are wedge-shaped clamping platforms, and the elastic cantilever ends (11) are bent by a small arc as a whole;The horizontal plane of the elastic cantilever ends (11) and the inner wall surface of the squeegee connector (7) form an insertion channel for the end of the auxiliary arm rod (3).
9. The wiper arm and blade coupling structure of claim 5, wherein: The auxiliary arm rod (3) and the limiting boss (12) are integrally injection molded.
10. A mounting arrangement for a wiper arm and wiper blade for a motor vehicle wiper, the mounting arrangement employing a wiper arm and wiper blade connection arrangement as claimed in any one of claims 1 to 9, characterised in that: The installation method comprises the following steps: S1: the elastic sheet (9) is combined and fixed with the squeegee connector (7) as an insert by the injection molding process, forming an integrated structure; S2: the squeegee seat pivot (6) of the squeegee seat (5) is assembled into the pivot assembly hole (8) of the squeegee connector (7), and the assembly of the squeegee blade (4) is completed. S3: through the guide structure of the auxiliary arm rod (3), the front end of the auxiliary arm rod (3) is inserted between the inner wall surface of the wiper connector (7) and the horizontal surface of the elastic cantilever end (11) of the elastic sheet (9), and then the limiting boss (12) is clamped into the limiting hole (13), the limiting and fixing of the auxiliary arm rod (3) in X direction, Y direction and Z direction are realized, and the installation of the wiper arm (1) and the wiper sheet (4) is completed.