Motorcycle oil tank tail block welding tool

Abstract

The utility model relates to motorcycle assembly frock technical field discloses motorcycle oil tank tail block welding frock, including bottom plate, the bottom plate is equipped with the front support block, middle support block and rear support block for supporting oil tank in proper order, the front support block, middle support block and rear support block top all are equipped with the profiling structure matched with oil tank contour, the front support block top is equipped with the locating post for fixing front bearing piece, the locating post both ends are fixed on the bottom plate through the support plate, the opposite side of two support plates is equipped with the limiting piece for limiting the movement of front bearing piece, the rear support block detachably is equipped with rear pressing plate for oil tank tail end. The utility model aims at ensuring the accuracy of oil tank and tail block welding position.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle assembly tooling technology, specifically to a welding tooling for the tail block of a motorcycle fuel tank. Background Technology

[0002] In motorcycle manufacturing, the tail block at the rear of the fuel tank needs to be fixedly connected to the fuel tank body by welding, and the front support component is a type of tail block. This front support component is a key component connecting the frame and the fuel tank, and the accuracy of its welding position and angle directly affects the overall assembly quality of the fuel tank and the stability of the vehicle. Therefore, before welding, the irregularly shaped fuel tank and the front support component to be welded must be accurately and reliably positioned and fixed to ensure that their relative positions fully meet the design requirements, thereby guaranteeing the final welding quality.

[0003] Currently, for this type of welding operation, common tooling designs often employ a step-by-step positioning method. First, a frame structure is used to position the oil tank. Multiple positioning elements, such as positioning pins and blocks, are installed on the frame. These elements engage with specific holes or surfaces on the oil tank to achieve positioning. Next, the operator manually adjusts the position of the front support component based on experience, ensuring it aligns with the area to be welded on the oil tank. Temporary fixation is then achieved through spot welding or the use of auxiliary clamps, before the final welding operation can proceed.

[0004] The aforementioned welding fixture scheme can accomplish basic welding tasks to a certain extent. However, the front support component relies mainly on manual alignment by the operator, lacking an effective dedicated positioning and locking mechanism. This makes it prone to displacement or deformation during welding, affecting welding accuracy and resulting in poor product consistency. Secondly, the step-by-step positioning and manual adjustment method increases clamping time and is highly dependent on the operator's skills and experience, making it difficult to meet the needs of mass production. Furthermore, the fuel tank itself may not be fully restrained due to its complex curved surface or protruding structure, or the front support component may not fit tightly against the fuel tank, affecting welding quality. Utility Model Content

[0005] The present invention aims to provide a welding fixture for the tail section of a motorcycle fuel tank to ensure the accuracy of the welding position between the fuel tank and the tail section.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A welding fixture for the tail section of a motorcycle fuel tank includes a base plate. The base plate is provided with a front support block, a middle support block, and a rear support block for supporting the fuel tank. The top of each of the front, middle, and rear support blocks is provided with a contoured structure that matches the outline of the fuel tank. A positioning post for fixing the front support component is provided above the front support block. The two ends of the positioning post are fixed to the base plate by support plates. Limiting components for restricting the movement of the front support component are provided on the opposite sides of the two support plates. The rear support block is detachably provided with a rear pressure plate for the tail end of the fuel tank.

[0007] The principles and advantages of this scheme are: 1. The fuel tank and the front support component are independently positioned and limited. By precisely fitting the contoured structure at the top of the front support block, middle support block, and rear support block with the fuel tank shell, accurate support and positioning of the irregularly shaped curved fuel tank are achieved, effectively restricting the movement of multiple degrees of freedom and ensuring the stability of the fuel tank position during welding. The positioning pins and limiting components restrict the vertical and horizontal displacement of the front support component. The multi-dimensional positioning method ensures the accuracy of the welding position of the front support component and the relative position of the front support component and the fuel tank, significantly improving the welding quality.

[0008] 2. While the front support is being positioned, its bottom will press against the front end of the oil tank. By installing the front support, the relative positioning of the front support and the oil tank and the vertical pressing of the oil tank are achieved with just one operation.

[0009] 3. The positioning column, limit rod, and rear pressure plate are all independent and not installed before actual use. They can be installed sequentially according to the operation sequence during welding. They are also easy to disassemble after welding, which facilitates the reuse of tooling and the replacement of welding with different workpieces, thereby improving work efficiency. Moreover, the entire welding operation process is clear: first, place the oil tank and make it fit the contour structure, then install the rear pressure plate to press the tail end of the oil tank, then install the positioning column and adjust the position of the front support, and finally install the limit rod to fix the front support. The operator can easily master and execute the operation, reducing operational errors.

[0010] Preferably, as an improvement, the front support block is provided with a front support block clearance groove for avoiding the fuel tank filler neck.

[0011] Technical effect: The above-mentioned configuration solves the problem of physical interference between the fuel tank filler neck and the front support block, ensuring that the fuel tank can be placed completely and flat on the contoured structure of the front support block.

[0012] Preferably, as an improvement, the middle support block is provided with a middle support block avoidance groove for avoiding the oil tank protrusion.

[0013] Technical effect: The above-mentioned configuration solves the interference problem between the protruding parts on the surface of the fuel tank and the central support block, ensuring that the fuel tank can be placed completely and flat on the contoured structure of the central support block.

[0014] Preferably, as an improvement, the positioning post includes a handle and a mounting rod arranged coaxially. The diameter of the handle is larger than the diameter of the mounting rod. The two ends of the mounting rod pass through through holes in the support plate for fixing. The two rings of the front support member pass through the mounting rod for fixing and are located between the two support plates. The bottom of the front support member abuts against the oil tank.

[0015] Technical benefits: The above-mentioned configuration facilitates the direct mounting of the front support component onto the mounting rod for fixation and allows for precise positioning of the front support component's vertical position. The handle's diameter is larger than that of the mounting rod, which facilitates manual operation and also serves as a limit and visual indicator. When the handle touches the support plate, it indicates that the mounting rod is properly installed, preventing it from being installed too deeply or too shallowly.

[0016] Preferably, as an improvement, the through hole of the support plate is provided with a sleeve that mates with the mounting rod.

[0017] Technical benefits: The above-mentioned configuration avoids direct friction and wear between the mounting rod and the through hole of the support plate. The sleeve can provide a tighter fit, reducing the slight shaking that may occur during the welding process of the positioning post, which helps to improve the positioning rigidity and welding accuracy.

[0018] Preferably, as an improvement, the sleeve is provided with an extension section, which is located on one side opposite to the two support plates.

[0019] Technical benefits: This solution uses the above-mentioned setup, with the extended section serving as an axial positioning reference. When installing the front support component, one of its rings can be manually pressed against the extended section, thus quickly determining the approximate correct position of the front support component in the left and right directions before installing the limit rod. Subsequent installation of the limit rod only requires fine-tuning or direct tightening, simplifying the operation steps and improving clamping efficiency.

[0020] Preferably, as an improvement, the limiting member includes a fixed seat and a limiting rod. The fixed seat is fixedly connected to the support plate, and the limiting rod is detachably mounted on the top of the fixed seat. The upper part of the limiting rod bends forward to the front support member and abuts against the front support member.

[0021] Technical benefits: The above-mentioned setup in this solution restricts the left and right movement and rotation of the workpiece, forming a complete degree of freedom constraint with the positioning column; and the limit rod is detachable, ensuring that there are no obstacles when placing the workpiece and installing the positioning column, maximizing the operating space.

[0022] Preferably, as an improvement, the rear pressure plate is a U-shaped structure with both ends inclined outward, and the two ends of the rear pressure plate are detachably connected to the rear support seat by pins.

[0023] Technical benefits: The above-mentioned design allows for better adaptation to the contours of the fuel tank's tail end. The hollowed-out section in the middle avoids interference with the mounting plate at the tail end of the fuel tank, ensuring a stable clamping effect. Furthermore, the two ends of the rear pressure plate are detachably connected to the rear support base via pins, facilitating installation and disassembly and making it easier to place and remove the fuel tank, thus improving work efficiency.

[0024] Preferably, as an improvement, the rear pressure plate is provided with a contour plate, which is connected to the concave shape at the tail end of the fuel tank.

[0025] Technical effect: With the above settings, the contour plate can fit tightly against the concave part of the tail end of the fuel tank, making the pressing force of the rear pressure plate on the tail end of the fuel tank more uniform, effectively preventing the fuel tank from moving or deforming during the welding process, and ensuring the welding quality. Attached Figure Description

[0026] Figure 1 This is an assembly diagram of an embodiment of the present utility model.

[0027] Figure 2 This is a structural schematic diagram of an embodiment of the present utility model.

[0028] Figure 3 This is a schematic diagram of the installation of the front support component of this utility model.

[0029] Figure 4 This is a schematic diagram of the structure of the rear support block of this utility model.

[0030] Figure 5 This is a structural schematic diagram of the rear support block of this utility model from another perspective.

[0031] The reference numerals in the accompanying drawings include: oil tank 1, front support 2, base plate 3, front support block 4, front support block clearance groove 41, middle support block 5, middle support block clearance groove 51, rear support block 6, rear pressure plate 61, contour plate 62, pin 63, positioning post 7, handle 71, mounting rod 72, support plate 8, sleeve 81, limiting component 9, fixing seat 91, and limiting rod 92. Detailed Implementation

[0032] The following detailed description illustrates the specific implementation method: Example The basics are as follows: Figures 1-5 As shown: like Figure 1As shown, a welding fixture for the tail section of a motorcycle fuel tank 1 is used to fix and limit the front support 2 to the fuel tank 1, facilitating welding between the two. It includes a base plate 3, on which a front support block 4, a middle support block 5, and a rear support block 6 are sequentially mounted to support the fuel tank 1. The tops of the front support block 4, middle support block 5, and rear support block 6 each have a contour-following structure matching the outline of the fuel tank 1. The fuel tank 1 is placed upside down on the front support block 4, middle support block 5, and rear support block 6. The contour-following structures on these blocks fit snugly against the fuel tank 1, positioning it and restricting its movement. The front support block 4 has a front support block clearance groove 41 to avoid the fuel tank 1's filler neck, and the middle support block 5 has a middle support block clearance groove 51 to avoid protrusions from the fuel tank 1. A detachable rear pressure plate 61 for the fuel tank 1 is mounted on the rear support block 6, pressing the tail end of the fuel tank 1 tightly against the rear support block 6.

[0033] like Figure 3 As shown, a positioning post 7 for fixing the front support member 2 is provided above the front support block 4. The two ends of the positioning post 7 are fixed to the base plate 3 by the support plate 8. The positioning post 7 includes a handle 71 and a mounting rod 72 arranged coaxially. The diameter of the handle 71 is larger than the diameter of the mounting rod 72. The two ends of the mounting rod 72 pass through the through holes on the support plate 8 for fixing. When the handle 71 abuts against the support plate 8, it indicates that the positioning post 7 is installed in place.

[0034] The two rings of the front support member 2 are fixed by passing through the mounting rod 72, which positions the front support member 2 vertically. The front support member 2 is located between two support plates 8. The opposite sides of the two support plates 8 are provided with limiting members 9 to restrict the movement of the front support member 2 and to restrict the left and right position of the front support member. The limiting member 9 includes a fixed base 91 and a limiting rod 92. The fixed base 91 is fixedly connected to the support plate 8. The limiting rod 92 is detachably mounted on the top of the fixed base 91. The upper part of the limiting rod 92 bends forward and abuts against the front support member 2. After the front support member 2 is fixed, its bottom abuts against the oil tank 1, pressing the front end of the oil tank 1 against the front support block 4.

[0035] like Figure 3 As shown, a sleeve 81 is provided in the through hole of the support plate 8 to connect with the mounting rod 72. The sleeve 81 is made of rubber and has an interference fit with the mounting rod 72. Furthermore, the sleeve 81 has an extension section located on one side opposite to the two support plates 8. In this embodiment, only one sleeve 81 has an extension section, which contacts one of the rings of the front support member 2, thus enabling the pre-positioning of the left and right positions of the front support member.

[0036] like Figure 4As shown, the rear pressure plate 61 is a U-shaped structure with both ends inclined outwards. The opening in the middle is used to avoid the mounting plate at the tail end of the oil tank 1 that is attached to the rear support block 6. The two ends of the rear pressure plate 61 are detachably connected to the rear support base by pins 63. Figure 5 As shown, a contour plate 62 is provided on the inner side of the rear pressure plate 61 (i.e. the side that fits the oil tank 1), and the contour plate 62 is connected to the concave shape at the tail end of the oil tank 1.

[0037] Before actual use, the positioning post 7, the limiting rod 92, and the rear pressure plate 61 are all independent and not installed. During welding, the fuel tank 1 is placed upside down on the front support block 4, the middle support block 5, and the rear support block 6, so that the fuel tank 1 simultaneously conforms to the contoured structure of these blocks. At this time, the fuel filler neck of the fuel tank 1 is located within the clearance groove 41 of the front support block, and the protrusion of the fuel tank 1 is located within the clearance groove 51 of the middle support block. Then, the contoured plate 62 on the rear pressure plate 61 is aligned with the recess at the tail end of the fuel tank 1 and inserted. The rear pressure plate 61 is then fixed to the rear support block 6 using pins 63. At this point, the rear pressure plate 61 presses the tail end of the fuel tank 1 firmly against the rear support block 6. Figure 3 As shown, the mounting rod 72 of the positioning column 7 is passed through the left support plate 8, the ring of the front support member 2 and the right support plate 8 in sequence and fixed. Then, the front support member 2 is manually moved so that the ring on its right side is close to the extended section of the right sleeve 81. Finally, the limiting rod 92 is installed on the fixed seat 91 so that its end abuts against the front support member 2. At this time, the position of the front support member is fixed. At the same time, the bottom of the front support member is attached to the welding position on the oil tank 1 and the front end of the oil tank 1 is pressed against the front support block 4 to ensure the stability of the oil tank 1. Then welding can be performed.

[0038] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A welding fixture for the tail section of a motorcycle fuel tank, including a base plate, characterized in that: The base plate is provided with a front support block, a middle support block and a rear support block for supporting the fuel tank in sequence. The top of the front support block, the middle support block and the rear support block are provided with a contour structure that matches the outline of the fuel tank. The front support block is provided with a positioning post for fixing the front support component. The two ends of the positioning post are fixed to the base plate by support plates. The opposite sides of the two support plates are provided with limiting components for restricting the movement of the front support component. The rear support block is detachably provided with a rear pressure plate for the tail end of the fuel tank.

2. The welding fixture for the motorcycle fuel tank tail block according to claim 1, characterized in that: The front support block is provided with a front support block avoidance groove for avoiding the fuel tank filler port.

3. The welding fixture for the motorcycle fuel tank tail block according to claim 1, characterized in that: The middle support block is provided with a middle support block avoidance groove for avoiding the protruding part of the oil tank.

4. The welding fixture for the tail section of a motorcycle fuel tank according to claim 1, characterized in that: The positioning post includes a handle and a mounting rod arranged coaxially. The diameter of the handle is larger than the diameter of the mounting rod. The two ends of the mounting rod pass through through holes in the support plate for fixing. The two rings of the front support member pass through the mounting rod for fixing and are located between the two support plates. The bottom of the front support member abuts against the oil tank.

5. The welding fixture for the motorcycle fuel tank tail block according to claim 4, characterized in that: The support plate has a sleeve inside the through hole that is connected to the mounting rod.

6. The welding fixture for the motorcycle fuel tank tail block according to claim 5, characterized in that: The sleeve is provided with an extension section, which is located on one side opposite to the two support plates.

7. The welding fixture for the tail section of a motorcycle fuel tank according to claim 1, characterized in that: The limiting component includes a fixed base and a limiting rod. The fixed base is fixedly connected to the support plate, and the limiting rod is detachably mounted on the top of the fixed base. The upper part of the limiting rod bends forward to the front support and abuts against the front support.

8. The welding fixture for the tail section of a motorcycle fuel tank according to claim 1, characterized in that: The rear pressure plate is a U-shaped structure with both ends inclined outwards, and the two ends of the rear pressure plate are detachably connected to the rear support seat by pins.

9. The welding fixture for the tail section of a motorcycle fuel tank according to claim 8, characterized in that: The rear pressure plate is provided with a contour plate, which is connected to the concave shape at the tail end of the fuel tank.

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