Handle fine positioning assembly tool and assembly method thereof

Abstract

The present application relates to a handle precision positioning assembly tool and its assembly method, which is used for assembling the handle and the front fork assembly, the front fork assembly comprising a front fork stand, a front fork left shock absorber and a front fork right shock absorber; the handle precision positioning assembly tool comprises an upper positioning seat and a positioning base, the upper positioning seat is provided with a handle positioning groove for placing the handle, the positioning base is provided with a main positioning groove one, a main positioning groove two and an auxiliary positioning groove, the main positioning groove one is used for positioning the front fork left shock absorber, the main positioning groove two is used for positioning the front fork right shock absorber, and the auxiliary positioning groove is used for positioning the front fork stand; the spacing between the handle positioning groove and the main positioning groove one, the main positioning groove two and the auxiliary positioning groove is fixedly arranged; the precision positioning assembly between the handle and the front fork assembly is realized through the handle positioning groove, the main positioning groove one, the main positioning groove two and the auxiliary positioning groove. The positioning assembly tool directly realizes the precision positioning of the handle and the front fork stand by adopting the size chain shortening structure matching mode, and greatly reduces the fluctuation of the left and right sides of the handle.

Description

Technical Field

[0001] This invention relates to the field of motorcycle assembly technology, specifically a handlebar precision positioning assembly fixture and its assembly method. Background Technology

[0002] The handlebar assembly of an electric motorcycle (hereinafter referred to as "electric motorcycle") is a core control component that is directly connected to the front fork column. As the only control component that controls the vehicle to turn left and right and maintain driving balance, its function plays a decisive role in the driving safety of electric motorcycles. Therefore, the assembly precision of the handlebars is directly related to the personal safety of the rider and is one of the core safety components of electric motorcycles.

[0003] Currently, the mainstream connection method between the handlebars and the fork uprights in the electric motorcycle industry is as follows: Figure 8 As shown, the handle 1 is first fitted onto the outside of the fork column 2-1, and then the two are locked and fixed by a vertically set bolt 3 (with a limiting pad 4 clamped in), so as to achieve relative fixation between the handle 1 and the fork column 2. However, since the actual usable length of the handle 1 is about 650mm, while its connection and mating length with the fork column 2-1 is only about 30mm, the mating length is less than 5% of the overall length of the handle. The lever arm and support size are mismatched. Under the above-mentioned structural conditions of short mating length, there is still a mating gap of 0.01 to 0.05mm between the handle 1 and the fork column 2-1. Under the above structural ratio, the left and right sides of the handle 1 are prone to obvious positional deviations after assembly. The maximum deviation in the front-to-back direction can reach 20mm (i.e., the left side of the handle 1 is 10mm forward and the right side is 10mm backward), and the maximum deviation in the vertical direction can reach 10mm (i.e., the left side of the handle 1 is 5mm upward and the right side is 5mm downward). The aforementioned positional deviation directly causes the actual direction of the electric motorcycle to deviate from the direction controlled by the rider through the handlebars during operation, thereby interfering with the rider's driving judgment, increasing the probability of operational errors, and posing a direct threat to the rider's personal safety. Therefore, it is urgent to improve the existing connection structure between the handlebars and the fork column of electric motorcycles to solve the safety hazards caused by the aforementioned precision defects.

[0004] More importantly, the electric motorcycle industry currently lacks effective control measures to address the precision defects caused by the connection structure, making it impossible to fundamentally avoid this safety hazard. Therefore, it is urgent to improve the connection method between the existing electric motorcycle handlebars and the fork column to eliminate the aforementioned precision defects and enhance the safety and reliability of the core control system of electric motorcycles. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the first objective of this invention is to provide a handlebar precision positioning assembly fixture. This fixture has an ingenious structure and achieves precise positioning between the handlebar and the fork column by shortening the structural proportions in the dimensional chain. This significantly reduces the left-right fluctuation of the handlebar, controlling it precisely within 1mm. Compared to the maximum 20mm fluctuation of the handlebar in the prior art, this invention makes the deviation between the actual driving direction of the vehicle and the direction controlled by the rider through the handlebar negligible. This allows the rider to make accurate driving judgments, effectively reducing the probability of operational errors, significantly improving rider safety, and enhancing the riding experience. This facilitates the promotion and application of the aforementioned handlebar precision positioning assembly fixture in the field of motorcycle assembly technology. The second objective of this invention is to provide an assembly method for the handlebar precision positioning assembly fixture. By applying the aforementioned handlebar precision positioning assembly fixture, the invention also ensures vehicle assembly accuracy, allows the rider to make accurate driving judgments, effectively reduces the probability of operational errors, and significantly improves rider safety.

[0006] The aforementioned handle precision positioning assembly fixture and its assembly method are technically related and belong to the same inventive concept.

[0007] To achieve the first objective mentioned above, the present invention adopts the following technical solution: a handlebar precision positioning assembly fixture for assembling a handlebar and a fork assembly, the fork assembly including a fork column, a left fork shock absorber, and a right fork shock absorber; the handlebar precision positioning assembly fixture includes an upper positioning seat and a positioning base, the upper positioning seat having a handlebar positioning groove for placing the handlebar, the positioning base having a main positioning groove one, a main positioning groove two, and an auxiliary positioning groove, the main positioning groove one being used for positioning the left fork shock absorber, the main positioning groove two being used for positioning the right fork shock absorber, and the auxiliary positioning groove being used for positioning the fork column, the distance between the handlebar positioning groove and the main positioning groove one, the main positioning groove two, and the auxiliary positioning groove being fixedly set, and the precision positioning assembly between the handlebar and the fork assembly is achieved through the handlebar positioning groove, the main positioning groove one, the main positioning groove two, and the auxiliary positioning groove.

[0008] As a preferred embodiment of the present invention, the upper positioning seat includes an upper positioning platform, an upper receiving frame, and an upper positioning plate. The upper positioning platform is fixedly connected to the top of the positioning base. The upper receiving frame is connected between the upper positioning platform and the upper positioning plate. The upper positioning plate is located on the side of the upper receiving frame. A hooking portion is formed on the side of the upper positioning plate, and the handle positioning groove is formed in the hooking portion.

[0009] As a preferred embodiment of the present invention, there are two handle positioning slots, which are symmetrically arranged along the central axis of the upper positioning plate and are both located close to the edge of the upper positioning plate.

[0010] In a preferred embodiment of the present invention, the upper receiving frame is arranged perpendicularly to the upper positioning platform.

[0011] In a preferred embodiment of the present invention, the upper positioning platform is flat; the positioning base has a base support, a base receiving, and a base abutting. The top of the base support is planar and is used to fit against the upper positioning platform. Two base receiving portions are formed at a distance between the base support and the base abutting. The first main positioning groove and the second main positioning groove are respectively formed on the sides of the two base abutting portions, and the auxiliary positioning groove is formed on the side of the base support.

[0012] As a preferred embodiment of the present invention, the width of the first main positioning groove and the second main positioning groove is 0.2 mm larger than the diameter of the shock absorber that it is matched with; the width tolerance of the first main positioning groove and the second main positioning groove is mm.

[0013] As a preferred embodiment of the present invention, the depth of the first main positioning groove and the second main positioning groove is 10 mm greater than the diameter of the shock absorber that it is matched with.

[0014] As a preferred embodiment of the present invention, the positioning base is integrally molded from nylon material and a weight-reducing groove is formed at the base receiving part.

[0015] As a preferred embodiment of the present invention, a height adjustment component is assembled between the upper positioning seat and the positioning base. The height adjustment component is an integrally formed sheet component. By selecting different specifications of the height adjustment component, the handle precision positioning assembly tooling can be adapted to the assembly of different vehicle models.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The handle precision positioning assembly fixture of the present invention is ingenious and is used to assemble the handle and the front fork assembly. It is achieved by setting an upper positioning seat and a positioning base, forming a handle positioning groove adapted to the handle on the upper positioning seat, and forming a main positioning groove one, a main positioning groove two, and an auxiliary positioning groove on the positioning base. The main positioning groove one is used to adapt to and position the left shock absorber of the front fork, the main positioning groove two is used to adapt to and position the right shock absorber of the front fork, and the auxiliary positioning groove is used to adapt to and position the front fork upright. Through the handle positioning groove, the main positioning groove one, and the main positioning groove two, the assembly fixture is designed to assemble the handle and the fork assembly assembly. The main positioning groove and the auxiliary positioning groove, by shortening the structural ratio in the dimensional chain, directly achieve precise positioning of the handlebar and the fork column, significantly reducing the left and right side fluctuation of the handlebar. It can be precisely controlled within 1mm. Compared with the maximum 20mm fluctuation of the handlebar in the prior art, the present invention can make the deviation between the actual driving direction of the vehicle and the direction controlled by the rider through the handlebar negligible. This allows the rider to make accurate driving judgments, effectively reducing the probability of operational errors, significantly improving the rider's driving safety, and improving the riding experience. This is conducive to the promotion and application of the aforementioned handlebar precision positioning assembly tooling in the field of motorcycle assembly technology.

[0017] To achieve the second objective mentioned above, the present invention adopts the following technical solution: an assembly method for a handle precision positioning assembly fixture, comprising the following steps:

[0018] S1. Align the handle with the fork stem and slip it onto the outside of the fork stem.

[0019] S2. After inserting the glove into place, rotate the handle to the preset assembly angle;

[0020] S3. Place the toothed limiting pad into the gap between the handlebar and the fork column to achieve initial positioning of the handlebar and the fork column.

[0021] S4. Pass the bolts through the mounting holes of the aligned limit pads, the mounting holes of the fork column and the mounting holes of the handle in sequence, and then install the nuts on the other end of the bolts to complete the initial assembly of pre-installation and tightening. Do not tighten the nuts to leave room for operation for subsequent precise adjustment and final tightening.

[0022] S5. Insert the handle positioning groove of the upper positioning seat into the handle and ensure that the handle is in contact with the bottom of the handle positioning groove. At the same time, rotate the positioning base so that the main positioning groove one is engaged with the left shock absorber of the front fork, the main positioning groove two is engaged with the right shock absorber of the front fork, and the auxiliary positioning groove is engaged with the front fork column. Ensure that the handle positioning groove is engaged with the handle, the main positioning groove one is engaged with the left shock absorber of the front fork, the main positioning groove two is engaged with the right shock absorber of the front fork, and the auxiliary positioning groove is engaged with the front fork column, thus completing the fine positioning of the handle.

[0023] Compared with the prior art, the beneficial effects of the present invention are: the assembly method of the handlebar precision positioning assembly fixture of the present invention, by applying the above-mentioned handlebar precision positioning assembly fixture, also has the advantages of ensuring vehicle assembly accuracy, enabling riders to make accurate driving judgments on the vehicle, effectively reducing the probability of operational errors, and significantly improving the rider's driving safety. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a handle precision positioning assembly fixture in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the upper positioning seat in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the positioning base in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the height adjustment component in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the vehicle frame assembly in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the initial use state of a handle precision positioning assembly fixture according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the final use state of a handle precision positioning assembly fixture according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the assembly of the handlebars and fork column in the existing technology.

[0032] Reference numerals in the attached diagram: 1. Handlebar; 2. Front fork assembly; 2-1. Front fork column; 2-2. Left front fork shock absorber; 2-3. Right front fork shock absorber; 3. Bolt; 4. Limiting pad; 5. Frame; 6. Upper positioning seat; 6-1. Handlebar positioning groove; 6-2. Upper positioning platform; 6-3. Upper support frame; 6-4. Upper positioning plate; 7. Positioning base; 7-1. Main positioning groove one; 7-2. Main positioning groove two; 7-3. Auxiliary positioning groove; 7-4. Base support part; 7-5. Base support part; 7-6. Base abutment part; 7-7. Weight reduction groove; 8. Height adjustment component; 8-1. Connecting hole. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present invention.

[0034] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0036] Example: To solve the above-mentioned technical problems, such as Figures 1 to 7 As shown, a handlebar precision positioning assembly fixture is mainly used to achieve precise positioning of the handlebar 1 and the front fork assembly 2, improving assembly speed while ensuring assembly accuracy. The aforementioned front fork assembly 2 mainly consists of a front fork column 2-1, a left front fork shock absorber 2-2, and a right front fork shock absorber 2-3. The front fork column 2-1 connects to the handlebar 1 and the frame 5, responsible for accurately transmitting the rider's steering torque to the front wheel, determining the vehicle's directional characteristics. The left and right front fork shock absorbers 2-2 and 2-3 are symmetrically arranged on both sides of the front wheel, directly bearing the axle and absorbing the impact from uneven road surfaces, thereby ensuring smoothness and tire contact with the ground during riding. Figure 8As shown, in the prior art, the handle 1 is usually first fitted onto the outside of the fork column 2-1, and then the two are locked and fixed by a vertically set bolt 3 (with a limiting pad 4 clamped in), so as to achieve relative fixation between the handle 1 and the fork column 2. However, since the actual usable length of the handle 1 is about 650mm, while its connection and mating length with the fork column 2-1 is only about 30mm, the mating length is less than 5% of the overall length of the handle. The lever arm and support size are mismatched. Under the above-mentioned structural conditions of short mating length, there is still a mating gap of 0.01 to 0.05mm between the handle 1 and the fork column 2-1. Under the above structural ratio, after assembly, the left and right sides of the handle 1 are prone to obvious positional deviations. The maximum deviation in the front-to-back direction can reach 20mm (i.e., the left side of the handle 1 is 10mm forward and the right side is 10mm backward), and the maximum deviation in the vertical direction can reach 10mm (i.e., the left side of the handle is 5mm upward and the right side is 5mm downward). The aforementioned positional deviation directly causes a discrepancy between the actual direction of the electric motorcycle and the direction controlled by the rider through the handlebars during operation. This interferes with the rider's driving judgment, increases the probability of operational errors, and poses a direct threat to the rider's personal safety. To solve the above technical problems, the handlebar precision positioning assembly fixture in this embodiment mainly consists of an upper positioning seat 6 and a positioning base 7. The upper positioning seat 6 has a handlebar positioning groove 6-1, which is used to support and position the handlebar 1. There are two handlebar positioning grooves 6-1, which are respectively located at both ends of the upper positioning seat 6 and symmetrically arranged along the central axis of the upper positioning seat 6. The actual usable length of the handlebar 1 is approximately 650mm, and the control force points are mainly concentrated in the grip areas at both ends. If only a single support point is set in the middle of the handle 1, the long cantilever structure is prone to deflection deformation under its own weight and clamping force, resulting in uncertainty in the actual spatial position of both ends. In this embodiment, by symmetrically setting handle positioning grooves 6-1 at both ends of the upper positioning seat 6, a span support can be formed for the handle 1 within the entire 650mm length range, so that the control areas at both ends are directly positioned and constrained, avoiding the impact of the long rod's overhang deformation on the assembly accuracy.

[0037] In this embodiment, the positioning base 7 has a main positioning groove 7-1, a main positioning groove 7-2, and an auxiliary positioning groove 7-3. The main positioning groove 7-1 is used for positioning the left shock absorber 2-2 of the front fork, the main positioning groove 7-2 is used for positioning the right shock absorber 2-3 of the front fork, and the auxiliary positioning groove 7-3 is used for positioning the front fork column 2-1. The distance between the handlebar positioning groove 6-1 and the main positioning groove 7-1, the main positioning groove 7-2, and the auxiliary positioning groove 7-3 is fixed. By combining the main and auxiliary positioning, the handlebar positioning groove 6-1, the main positioning groove 7-1, the main positioning groove 7-2, and the auxiliary positioning groove 7-3 are used to achieve precise positioning and assembly between the handlebar 1 and the front fork assembly 2, ensuring the accuracy of the tooling positioning. Specifically, the main positioning groove 7-1 and the main positioning groove 7-2, which cooperate with the left shock absorber 2-2 and the right shock absorber 2-3 of the front fork respectively, serve as the main positioning structure of the assembly fixture, primarily used to control the XY direction of the fixture. The auxiliary positioning groove 7-3, which cooperates with the front fork column 2-1, serves as the auxiliary positioning structure, also used to control the XY direction of the fixture. The main and auxiliary positioning work together to improve the stability and accuracy of the fixture positioning. The assembly fixture structure in this embodiment can significantly reduce the fluctuation of the handlebar 1 on the left and right sides, precisely controlling it to within 1mm. Compared to the maximum fluctuation of 20mm in the prior art, the assembly fixture in this embodiment makes the deviation between the actual driving direction of the vehicle and the direction controlled by the rider through the handlebar negligible, thereby allowing the rider to make accurate driving judgments, effectively reducing the probability of operational errors, significantly improving the rider's driving safety, and enhancing the riding experience.

[0038] In this embodiment, both the upper positioning seat 6 and the positioning base 7 are made of nylon. The handle 1 and the fork assembly 2 are typically made of aluminum alloy or carbon steel, with surfaces treated by anodizing, electroplating, or spraying. Nylon has a much lower hardness than metal and is self-lubricating. During positioning and clamping, it can effectively prevent the positioning groove from causing scratches, indentations, or plating damage to the workpiece mating surfaces and appearance surfaces, ensuring that the surface quality of the assembled workpiece meets factory requirements. Compared to metal tooling materials such as cast iron and aluminum alloy, nylon has a lower density and lighter weight. The upper positioning seat 6 needs to be opened and closed frequently to pick up and put down workpieces. The lightweight design can significantly reduce the operator's labor intensity, increase the assembly cycle time of a single station, and facilitate the handling, replacement, and storage of tooling on the production line.

[0039] Specifically, in this embodiment, the upper positioning seat 6 mainly consists of an upper positioning platform 6-2, an upper receiving frame 6-3, and an upper positioning plate 6-4. The upper positioning platform 6-2 is used to be fixedly connected to the top of the positioning base 7. The upper receiving frame 6-3 is connected between the upper positioning platform 6-2 and the upper positioning plate 6-4. The upper positioning plate 6-4 is located on the side of the upper receiving frame 6-3. A hooking part 6-5 is formed on the side of the upper positioning plate 6-4. The handle positioning groove 6-1 is formed in the hooking part 6-5. That is, the handle positioning groove 6-1 is formed in the shape of a hooking groove on the side of the upper positioning plate 6-4 so as to fix the handle 1 in the handle positioning groove 6-1. At the same time, it is necessary to ensure that the entire assembly fixture can rotate around the handle 1 so as to realize the assembly of other parts of the assembly fixture. To prevent the upper support frame 6-3 from bending or tipping during assembly, in this embodiment, the upper support frame 6-3 is vertically arranged with the upper positioning platform 6-2. The upper positioning platform 6-2 is flat, and the positioning base 7 has a base support portion 7-4, a base receiving portion 7-5, and a base abutment portion 7-6. The top of the base support portion 7-4 is flat and is used to fit against the upper positioning platform 6-2. Two base receiving portions 7-5 are spaced apart between the base support portion 7-4 and the base abutment portion 7-6. The first main positioning groove 7-1 and the second main positioning groove 7-2 are respectively formed on the sides of the two base abutment portions 7-6, and the auxiliary positioning groove 7-3 is formed on the side of the base support portion 7-4. The upper positioning plate 6-4 serves as the direct bearing surface of the handle 1. The handle positioning groove 6-1 on it needs to be kept horizontal or at a specific angle to match the natural placement posture of the handle 1. That is, the upper positioning plate 6-4 is perpendicular to the upper support frame 6-3 or at an angle to the upper support frame 6-3, depending on the setting angle between the handle 1 and the fork upright 2-1.

[0040] To enable the assembly fixture in this embodiment to be adaptable to different models of motorcycles, a height adjustment component 8 is also installed between the upper positioning seat 6 and the positioning base 7. The height adjustment component 8 is an integrally formed sheet-like component. By selecting different specifications of the height adjustment component 8, the handle precision positioning assembly fixture can be adapted to the assembly of different vehicle models. Specifically, the height adjustment component 8 has a connecting hole 8-1. Correspondingly, the upper positioning platform 6-2 and the base support 7-4 have mounting through holes corresponding to the connecting hole 8-1. A detachable connection between the upper positioning seat 6, the positioning base 7, and the height adjustment component 8 is achieved by inserting bolts or other detachable connectors through the mounting through holes and the connecting hole 8-1, allowing for the replacement of the height adjustment component 8 and broadening the application range of the assembly work. The theoretical preset value of the height adjustment component 8 is 5-10mm, ensuring that the assembly fixture meets the requirements of multi-vehicle universality and adjustable assembly dimensions.

[0041] In this embodiment, the width of the main positioning groove 7-1 and the main positioning groove 7-2 is 0.2mm larger than the diameter of the shock absorber they mate with. This clearance ensures that the shock absorber can be smoothly inserted into and removed from the main positioning grooves 7-1 and 7-2, avoiding jamming or surface scratches caused by interference fits. It also keeps the clearance within a small range to prevent excessive radial swaying of the shock absorber within the grooves, thus ensuring the spatial positioning accuracy of the left / right front fork shock absorbers. The width tolerance of the main positioning grooves 7-1 and 7-2 in this embodiment is (0, +0.1mm). Even when machined to the lower tolerance limit, the groove width is still 0.2mm larger than the shock absorber diameter, ensuring that the groove width will never be smaller than the shock absorber diameter. This fundamentally eliminates the risk of workpieces being unable to fit or being forcibly pressed in, leading to surface scratches and plating damage to the shock absorber. To further ensure the reliability of the positioning process, in this embodiment, the depth of the main positioning groove 7-1 and the main positioning groove 7-2 is 10mm larger than the diameter of the shock absorber that they are matched with, so as to ensure the effective matching length between the groove and the shock absorber.

[0042] To further reduce the weight of the assembly tooling itself, the positioning base 7 in this embodiment has multiple weight-reducing grooves 7-7, and the upper positioning seat 6 has weight-reducing holes. Without affecting the overall positioning accuracy, structural strength and performance of the positioning tooling, the goal of lightweighting is achieved, the overall weight of the tooling is reduced, and the convenience of the tooling in use is improved.

[0043] In this embodiment, the upper positioning seat 6 is integrally molded. Its core function is to position the left and right ends of the handle 1, specifically controlling the positioning accuracy of the left and right ends of the handle 1 in the XZ direction, ensuring the accuracy and stability of the handle 1 assembly. The upper positioning seat 6 also adopts a symmetrical design to accommodate the assembly requirements of the left and right ends of the handle 1. The dimensional parameters of the handle positioning groove 6-1 strictly adhere to the following requirements: the theoretical value of the groove width in the X direction is set to the diameter of the mating handle + 0.2 mm, and the groove width tolerance is (0, +0.1) mm, ensuring the precise fit between the handle positioning groove 6-1 and the handle 1, and avoiding excessive or insufficient assembly gaps that could affect the positioning effect. The theoretical value of the depth of the handle positioning groove 6-1 is set to the diameter of the mating shock absorber + 10 mm, ensuring the effective contact length between the handle positioning groove 6-1 and the handle 1, further improving positioning reliability.

[0044] The handle precision positioning assembly fixture in this embodiment is mainly composed of the upper positioning seat 6, the positioning base 7, and the height adjustment component 8. During the assembly process, a combination of positioning and fastening is used to ensure the stability and accuracy of the three-component assembly. Specifically, the upper positioning seat 6, the positioning base 7, and the height adjustment component 8 are precisely positioned by two symmetrically arranged positioning pins to ensure that the relative positions of the three components meet the design requirements. After positioning, two fastening bolts are used to fix and lock them, further improving the overall rigidity of the three components after assembly, preventing loosening or displacement after assembly, and ensuring the overall stability of the fixture in use. To ensure that the tooling positioning accuracy meets the usage requirements, the positional accuracy of each key component is strictly controlled. The specific accuracy requirements are as follows: Taking the three slots on the positioning base 7, namely the main positioning slot 1 7-1, the main positioning slot 2 7-2, and the auxiliary positioning slot 7-3, as the core reference, the relative positional accuracy of these three slots is controlled at φ0.1mm to ensure the accuracy of the reference positioning; taking these three slots as the reference, the positional accuracy of the two slots on the upper positioning seat 6, namely the two handle positioning slots 6-1, is controlled at φ0.2mm to ensure the positioning coordination between the upper positioning seat 6 and the positioning base 7, thereby ensuring the positioning accuracy of the tooling for components such as the handle 1 and the front fork column 2-1, and meeting the accuracy requirements of subsequent assembly operations.

[0045] The assembly method of the handle precision positioning assembly fixture in this embodiment includes the following steps:

[0046] S1. First, align handle 1 with the fork column 2-1 and smoothly slip it onto the outside of the fork column 2-1. During the operation, ensure that handle 1 is properly slipped in to avoid affecting the subsequent assembly accuracy due to insufficient slipping.

[0047] S2. After the handle 1 is put into place, rotate the handle 1 to the preset assembly angle to ensure that the handle position meets the design assembly requirements.

[0048] S3. After the handlebar 1 angle is adjusted, the toothed limiting pad 4 is placed in the gap between the handlebar 1 and the fork column 2-1 to achieve the initial positioning of the handlebar 1 and the fork column 2-1.

[0049] S4. Pass the bolt 3 through the mounting holes of the aligned limit pad 4, the mounting holes of the fork column 2-1 and the mounting holes of the handle 1 in sequence. Then install the nut on the other end of the bolt 3 to complete the initial assembly of the pre-installation and tightening. Do not tighten the nut to leave room for operation for subsequent precise adjustment and final tightening.

[0050] S5. After completing the pre-installation of handle 1, perform tooling positioning operation. Insert the handle positioning groove 6-1 of the upper positioning seat 6 into handle 1 and ensure that handle 1 is in contact with the bottom of handle positioning groove 6-1. At the same time, rotate the positioning base 7 so that the main positioning groove 1 7-1 is engaged with the left shock absorber 2-2 of the front fork, the main positioning groove 2 7-2 is engaged with the right shock absorber 2-3 of the front fork, and the auxiliary positioning groove 7-3 is engaged with the front fork column 2-1. Ensure that handle positioning groove 6-1 is engaged with handle 1, main positioning groove 1 7-1 is engaged with the left shock absorber 2-2 of the front fork, main positioning groove 2 7-2 is engaged with the right shock absorber 2-3 of the front fork, and auxiliary positioning groove 7-3 is engaged with the front fork column 2-1. This completes the fine positioning of the handle. To ensure ease of quick disassembly after installation and to meet production line cycle requirements, this fixture is not designed with a fixing mechanism. Therefore, after the handle 1 is precisely positioned, the operator needs to assist in stabilizing the fixture upwards to prevent displacement from affecting assembly accuracy. Then, tighten the bolts according to the specified torque to finally complete the precision positioning and assembly of the handle.

[0051] This embodiment presents a handle precision positioning assembly fixture. This fixture is ingeniously designed for assembling the handle 1 and the front fork assembly 2. It comprises an upper positioning seat 6 and a positioning base 7. The upper positioning seat 6 has a handle positioning groove 6-1 adapted to the handle 1. The positioning base 7 has a first main positioning groove 7-1, a second main positioning groove 7-2, and an auxiliary positioning groove 7-3. The first main positioning groove 7-1 is adapted to and positions the left front fork shock absorber 2-2. The second main positioning groove 7-2 is adapted to and positions the right front fork shock absorber 2-3. The auxiliary positioning groove 7-3 is adapted to and positions the front fork upright 2-1. The handle positioning groove 6-1... The main positioning groove 7-1, main positioning groove 7-2, and auxiliary positioning groove 7-3, by shortening the structural ratio in the dimensional chain, directly achieve precise positioning of the handlebar 1 and the fork column 2-1, significantly reducing the left and right side fluctuation of the handlebar 1. This can be precisely controlled within 1mm. Compared with the maximum 20mm fluctuation of the handlebar in the prior art, the assembly fixture in this embodiment can make the deviation between the actual driving direction of the vehicle and the direction controlled by the rider through the handlebar negligible. This allows the rider to make accurate driving judgments, effectively reducing the probability of operational errors, significantly improving the rider's driving safety, and improving the riding experience. This is conducive to the promotion and application of the aforementioned handlebar precision positioning assembly fixture in the field of motorcycle assembly technology.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0053] Although this document frequently uses reference numerals from the accompanying drawings: 1. Handlebar; 2. Fork assembly; 2-1. Fork column; 2-2. Left fork shock absorber; 2-3. Right fork shock absorber; 3. Bolt; 4. Limiting pad; 5. Frame; 6. Upper positioning seat; 6-1. Handlebar positioning groove; 6-2. Upper positioning platform; 6-3. Upper support frame; 6-4. Upper positioning plate; 7. Positioning base; 7-1. Main positioning groove one; 7-2. Main positioning groove two; 7-3. Auxiliary positioning groove; 7-4. Base support part; 7-5. Base support part; 7-6. Base abutment part; 7-7. Weight reduction groove; 8. Height adjustment component; 8-1. Connecting hole, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A handle precision positioning assembly fixture, characterized in that: The tooling is used to assemble a handlebar (1) and a fork assembly (2), the fork assembly (2) including a fork column (2-1), a left fork shock absorber (2-2), and a right fork shock absorber (2-3); the handlebar precision positioning assembly tooling includes an upper positioning seat (6) and a positioning base (7), the upper positioning seat (6) having a handlebar positioning groove (6-1) for placing the handlebar (1), the positioning base (7) having a main positioning groove one (7-1), a main positioning groove two (7-2), and an auxiliary positioning groove (7-3), the main positioning groove one (7-1) being used for positioning the left fork shock absorber (2-2), and so on. The second main positioning groove (7-2) is used for positioning the right shock absorber (2-3) of the fork, and the auxiliary positioning groove (7-3) is used for positioning the fork column (2-1). The distance between the handlebar positioning groove (6-1) and the first main positioning groove (7-1), the second main positioning groove (7-2) and the auxiliary positioning groove (7-3) is fixed. The handlebar positioning groove (6-1), the first main positioning groove (7-1), the second main positioning groove (7-2) and the auxiliary positioning groove (7-3) are used to achieve precise positioning and assembly between the handlebar (1) and the fork assembly (2).

2. The handle precision positioning assembly fixture according to claim 1, characterized in that: The upper positioning base (6) includes an upper positioning platform (6-2), an upper receiving frame (6-3), and an upper positioning plate (6-4). The upper positioning platform (6-2) is used to be fixedly connected to the top of the positioning base (7). The upper receiving frame (6-3) is connected between the upper positioning platform (6-2) and the upper positioning plate (6-4). The upper positioning plate (6-4) is located on the side of the upper receiving frame (6-3). A hooking part (6-5) is formed on the side of the upper positioning plate (6-4). The handle positioning groove (6-1) is formed in the hooking part (6-5).

3. The handle precision positioning assembly fixture according to claim 2, characterized in that: There are two handle positioning slots (6-1). The two handle positioning slots (6-1) are symmetrically arranged along the central axis of the upper positioning plate (6-4) and are both located close to the edge of the upper positioning plate (6-4).

4. The handle precision positioning assembly fixture according to claim 2, characterized in that: The upper support frame (6-3) is perpendicular to the upper positioning platform (6-2).

5. The handle precision positioning assembly fixture according to claim 2, characterized in that: The upper positioning platform (6-2) is flat; the positioning base (7) has a base support (7-4), a base receiving part (7-5) and a base abutment part (7-6). The top of the base support (7-4) is flat and is used to fit against the upper positioning platform (6-2). Two base receiving parts (7-5) are formed at a distance between the base support (7-4) and the base abutment part (7-6). The first main positioning groove (7-1) and the second main positioning groove (7-2) are respectively formed on the sides of the two base abutment parts (7-6). The auxiliary positioning groove (7-3) is formed on the side of the base support (7-4).

6. The handle precision positioning assembly fixture according to claim 1, characterized in that: The width of the first main positioning groove (7-1) and the second main positioning groove (7-2) is 0.2 mm larger than the diameter of the shock absorber they are matched with; the width tolerance of the first main positioning groove (7-1) and the second main positioning groove (7-2) is (0, +0.1) mm.

7. The handle precision positioning assembly fixture according to claim 6, characterized in that: The depth of the first main positioning groove (7-1) and the second main positioning groove (7-2) is 10mm greater than the diameter of the shock absorber that they are matched with.

8. The handle precision positioning assembly fixture according to claim 5, characterized in that: The positioning base (7) is made of nylon material in one piece and a weight-reducing groove (7-7) is formed at the base receiving part (7-5).

9. The handle precision positioning assembly fixture according to claim 1, characterized in that: A height adjustment component (8) is assembled between the upper positioning seat (6) and the positioning base (7). The height adjustment component (8) is an integrally formed sheet component. By selecting different specifications of the height adjustment component (8), the handle precision positioning assembly tooling can be adapted to the assembly of different vehicle models.

10. An assembly method for a handle precision positioning assembly fixture, comprising using a handle precision positioning assembly fixture as described in any one of claims 1 to 9; characterized in that: Includes the following steps: S1. Align the handle (1) with the fork column (2-1) and slip it onto the outside of the fork column (2-1); S2. After the handle (1) is in place, rotate the handle (1) to the preset assembly angle; S3. Place the toothed limiting pad (4) into the gap between the handle (1) and the fork column (2-1) to achieve the initial positioning of the handle (1) and the fork column (2-1); S4. Pass the bolt (3) through the mounting holes of the aligned limiting pad (4), the mounting holes of the fork column (2-1), and the mounting holes of the handle (1) in sequence, and then install the nut on the other end of the bolt (3) to complete the initial assembly of the pre-installation and tightening. Do not tighten the nut to leave room for operation for subsequent precise adjustment and final tightening; S5. Place the upper part The handle positioning groove (6-1) of the positioning seat (6) is engaged with the handle (1) and ensures that the handle (1) is in contact with the bottom of the handle positioning groove (6-1). At the same time, the positioning base (7) is rotated so that the main positioning groove one (7-1) is engaged with the left shock absorber (2-2) of the front fork, the main positioning groove two (7-2) is engaged with the right shock absorber (2-3) of the front fork, and the auxiliary positioning groove (7-3) is engaged with the front fork column (2-1). It is also ensured that the handle positioning groove (6-1) is engaged with the handle (1), the main positioning groove one (7-1) is engaged with the left shock absorber (2-2) of the front fork, the main positioning groove two (7-2) is engaged with the right shock absorber (2-3) of the front fork, and the auxiliary positioning groove (7-3) is engaged with the front fork column (2-1), thus completing the fine positioning of the handle.

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