A welding fixture for bicycle handlebar components

Abstract

A welding fixture for bicycle handlebar components includes a base, a riser positioning and clamping mechanism, and a cross tube positioning and clamping mechanism. The base has a base plate and a connecting plate. The base plate is connected to a rotary table at the welding station via the connecting plate. A welding area clearance groove is provided on the base plate, and a cross tube limiting plate is provided at the inner edge of the welding area clearance groove. Two sets of risers are symmetrically arranged on the left and right sides of the cross tube limiting plate. The riser positioning and clamping mechanism is installed outside the welding area clearance groove on the base plate. The cross tube positioning and clamping mechanism includes a cross tube positioning component and a cross tube clamping component. The cross tube positioning component is fitted with the two sets of risers arranged on the left and right sides of the base plate, and the cross tube clamping component is installed on the base plate. This invention achieves accurate positioning and reliable fixing of the workpiece and can be matched with workpieces of different sizes and specifications, thus ensuring the quality of welded products, improving work efficiency, and enhancing the versatility of the tooling equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of bicycle manufacturing tooling equipment, specifically a welding tooling for bicycle handlebar components. Background Technology

[0002] The handlebars of a bicycle use leverage to control direction and are the core control component of the bicycle. (See attached image) Figure 1 The bicycle handlebar component 1 shown includes a cross tube 1-1 and a stem tube 1-2. The cross tube 1-1 has a bent structure in the middle. The included angle between the central axes of the left and right parts of the cross tube is θ. The cross tube 1-1 is welded to the stem tube 1-2 in the middle.

[0003] In the appendix Figure 1 When welding bicycle handlebar component 1, in order to ensure that the bicycle handlebar component 1 meets the dimensional requirements after welding and to improve the welding efficiency, it is necessary to use special welding fixtures that match the structure of the workpiece. Utility Model Content

[0004] This utility model provides a welding fixture for bicycle handlebar components. It aims to achieve accurate positioning and reliable fixing of the horizontal tube and vertical tube workpieces by cooperating with the base, the upright tube positioning and clamping mechanism and the horizontal tube positioning and clamping mechanism. It can be matched with workpieces of different sizes and specifications, so as to ensure the quality of welded products, improve work efficiency and the versatility of the tooling equipment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A welding fixture for bicycle handlebar components includes a base, a riser positioning and clamping mechanism, and a cross tube positioning and clamping mechanism. The base has a bottom plate and a connecting plate. The connecting plate is fixedly installed on the inner end of the bottom plate. The bottom plate is connected to the rotating shaft of a rotary machine at the welding station via the connecting plate. A welding part clearance groove is provided on the bottom plate. A cross tube limiting plate is provided at the inner edge of the welding part clearance groove, and two sets of upright plates are symmetrically arranged on the left and right sides of the cross tube limiting plate. The riser positioning and clamping mechanism is installed on the outer side of the welding part clearance groove on the bottom plate. The cross tube positioning and clamping mechanism includes a cross tube positioning component and a cross tube clamping component. The cross tube positioning component is fitted with the two sets of upright plates arranged on the left and right sides of the bottom plate. The cross tube positioning component and the cross tube limiting plate on the bottom plate are used to position the cross tube workpiece. The cross tube clamping component is installed on the bottom plate and is used to clamp and fix the cross tube workpiece.

[0007] The aforementioned bicycle handlebar welding fixture includes a horizontal tube positioning assembly comprising a horizontal tube positioning block and a side limiting block. The horizontal tube positioning block consists of two symmetrically arranged parts, which are respectively assembled with two sets of upright plates arranged on the left and right sides of the base plate. A horizontal tube positioning groove matching the outer wall of the horizontal tube is provided on the upper end face of the horizontal tube positioning block. The side limiting block is installed on the left or right upright plate and is located outside the horizontal tube positioning block.

[0008] The aforementioned bicycle handlebar welding fixture includes a cross tube clamping assembly comprising a cross tube clamping clamp and an adapter clamping head. The cross tube clamping clamp is mounted on a base plate, with its central axis and the central axis of the cross tube limiting plate located in the same plane perpendicular to the base plate. An adapter clamping head is fitted to its clamping end. The adapter clamping head has a U-shaped frame structure, with two vertically downward cross tube clamping heads at the open end of the U-shaped frame.

[0009] The aforementioned bicycle handlebar welding fixture includes a riser positioning and clamping mechanism comprising a riser positioning block and a riser clamping clamp. The riser positioning block is mounted on a base plate, with its central axis and the central axis of the horizontal tube limiting plate located in the same plane perpendicular to the base plate. A riser positioning groove matching the outer wall of the riser is provided on the upper end face of the riser positioning block. The riser clamping clamp is arranged on one side of the riser positioning block, and the riser workpiece placed in the riser positioning groove is clamped and fixed by the clamping head of the riser clamping clamp.

[0010] The aforementioned bicycle handlebar welding fixture has horizontal tube positioning block position adjustment holes on two sets of upright plates arranged on the left and right sides of the base plate, and a side limit stop block position adjustment hole on one set of upright plates. Correspondingly, a threaded hole is provided on the side wall of the horizontal tube positioning block. The horizontal tube positioning block position adjustment hole is a vertical elongated hole. The horizontal tube positioning block is assembled with the horizontal tube positioning block position adjustment hole on the upright plate by a bolt that mates with the threaded hole on its side wall. The side limit stop block position adjustment hole is a horizontal elongated hole.

[0011] The aforementioned bicycle handlebar welding fixture is further provided with a riser positioning block position adjustment hole, a riser clamping clamp position adjustment hole, and a cross tube clamping clamp assembly hole on the base plate; the riser positioning block position adjustment hole is a longitudinal elongated hole; the riser clamping clamp position adjustment hole is a transverse elongated hole; and the cross tube clamping clamp assembly hole consists of several sets of circular holes arranged along the central axis of the base plate.

[0012] This utility model provides a welding fixture for bicycle handlebar components. It positions the horizontal tube workpiece using a horizontal tube positioning and clamping mechanism and a horizontal tube limiting plate arranged on the base plate. The horizontal tube workpiece is then clamped and fixed using horizontal tube clamping pliers and an adapter clamping head. A vertical tube positioning and clamping mechanism arranged outside the clearance groove at the welding area of ​​the base plate positions and clamps and fixes the vertical tube workpiece. This achieves accurate positioning and reliable fixing of the welded workpiece, ensuring the quality of the welded product and enabling rapid workpiece positioning and clamping operations, greatly improving work efficiency. This utility model features vertical tube positioning block position adjustment holes, vertical tube clamping pliers position adjustment holes, and horizontal tube clamping pliers assembly holes on the base plate. Horizontal tube positioning block position adjustment holes are also provided on two sets of vertical plates symmetrically arranged on the left and right sides of the base plate, and a side limiting block position adjustment hole is provided on one set of vertical plates. Therefore, it can be matched with workpieces of different sizes and specifications, thereby improving the versatility of the welding fixture. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the bicycle handlebar component involved in this utility model;

[0014] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 3 yes Figure 2 Top view (after rotation);

[0016] Figure 4 This is a schematic diagram of the base structure;

[0017] Figure 5 yes Figure 4 Top view (after rotation);

[0018] Figure 6 This is a schematic diagram of the horizontal tube positioning block structure;

[0019] Figure 7 This is a schematic diagram of the adapter head structure of the horizontal tube clamping pliers;

[0020] Figure 8 This is a schematic diagram of the working state of this utility model;

[0021] Figure 9 yes Figure 8 Top view (after rotation).

[0022] Explanation of each label in the diagram:

[0023] 1 is the bicycle handlebar assembly, 1-1 is the cross tube, and 1-2 is the stem tube;

[0024] 2 is the base, 2-1 is the base plate, 2-2 is the connecting plate, 2-3 is the welding part clearance groove, 2-4 is the upright plate, 2-5 is the horizontal pipe limiting plate, 2-6 is the upright positioning block position adjustment hole, 2-7 is the upright clamping clamp position adjustment hole, 2-8 is the horizontal pipe positioning block position adjustment hole, 2-9 is the side limiting block position adjustment hole, and 2-10 is the horizontal pipe clamping clamp assembly hole.

[0025] 3 is the riser positioning block;

[0026] 4 is a riser clamping clamp;

[0027] 5 is the horizontal tube positioning block, and 5-1 is the threaded hole;

[0028] 6 is a horizontal tube clamping clamp;

[0029] 7 is the adapter head, and 7-1 is the horizontal tube head;

[0030] 8 is a side limit stop. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] Referring to Figure 1, a bicycle handlebar component 1 includes a cross tube 1-1 and a stem tube 1-2. The cross tube 1-1 has a bent structure in the middle. The included angle between the central axes of the left and right parts of the cross tube is θ. The cross tube 1-1 is welded to the stem tube 1-2 in the middle.

[0033] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 To ensure Figure 1 The bicycle handlebar component 1 shown in the figure meets the overall assembly size requirements of the bicycle after welding, improving welding efficiency. This utility model provides a welding fixture for bicycle handlebar components, which includes a base 2, a riser positioning and clamping mechanism, and a cross tube positioning and clamping mechanism. The base 2 is provided with a base plate 2-1 and a connecting plate 2-2. The connecting plate 2-2 is fixedly installed on the inner end of the base plate 2-1. The base plate 2-1 is connected to the rotating shaft of the indexing machine at the welding station through the connecting plate 2-2. A welding part avoidance groove 2-3 is provided on the base plate 2-1. The riser positioning and clamping mechanism is installed on the outer side of the welding part avoidance groove 2-3 on the base plate 2-1. The cross tube positioning and clamping mechanism is installed on the inner side of the welding part avoidance groove 2-3.

[0034] See Figure 4 , Figure 5The bicycle handlebar welding fixture of this utility model has a horizontal tube limiting plate 2-5 set at the inner edge of the welding part avoidance groove 2-3 on the base plate 2-1, and two sets of upright plates 2-4 are symmetrically set on the left and right sides of the horizontal tube limiting plate 2-5. The two sets of upright plates 2-4 are fixedly connected to the base plate 2-1.

[0035] See Figure 2 , Figure 3 , Figure 4 , Figure 5 The bicycle handlebar welding fixture of this utility model has a horizontal tube positioning and clamping mechanism, which includes a horizontal tube positioning component and a horizontal tube clamping component. The horizontal tube positioning component includes a horizontal tube positioning block 5 and a side limiting block 8. The horizontal tube positioning block 5 consists of two parts arranged symmetrically on the left and right, which are respectively assembled with two sets of upright plates 2-4 arranged on the left and right sides of the base plate 2-1. A horizontal tube positioning groove matching the outer wall of the horizontal tube 1-1 is provided on the upper end surface of the horizontal tube positioning block 5. The side limiting block 8 is installed on the left or right upright plate 2-4 and is located outside the horizontal tube positioning block 5. When the horizontal tube 1-1 workpiece is placed, the side limiting block 8 axially positions one end of the horizontal tube 1-1 workpiece. The left and right parts of the horizontal tube 1-1 workpiece can be respectively embedded into the horizontal tube positioning grooves of the two horizontal tube positioning blocks 5 arranged on the left and right, thereby limiting the vertical position of the horizontal tube 1-1 workpiece. The horizontal tube limiting plate 2-5 set on the base plate 2-1 holds the middle bending part of the horizontal tube 1-1 workpiece to restrict the horizontal tube 1-1 workpiece from rotating around its central axis.

[0036] See Figure 2 , Figure 3 , Figure 7 The bicycle handlebar welding fixture of this utility model includes a cross tube clamping assembly comprising a cross tube clamping clamp 6 and an adapter clamping head 7. The cross tube clamping clamp 6 is mounted on a base plate 2-1, and its central axis is located in the same plane perpendicular to the base plate 2-1 as the central axis of the cross tube limiting plate 2-5. An adapter clamping head 7 is fitted at the clamping end of the cross tube clamping clamp 6. The adapter clamping head 7 is a U-shaped frame structure, and its bottom center is fixedly assembled with the clamping end of the cross tube clamping clamp. Two vertically downward cross tube clamping heads 7-1 are provided at the open end of the U-shaped frame.

[0037] See Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6The bicycle handlebar welding fixture of this utility model includes a riser positioning and clamping mechanism comprising a riser positioning block 3 and a riser clamping clamp 4. The riser positioning block 3 is mounted on a base plate 2-1, and a riser positioning groove matching the outer wall of the riser 1-2 is provided on the upper end face of the riser positioning block 3. The riser clamping clamp 4 is arranged on one side of the riser positioning block 3. When the riser 1-2 workpiece is placed, it is placed in the riser positioning groove of the riser positioning block 3, so that one end of it abuts against the middle bend of the horizontal tube 1-1 workpiece, and then the riser 1-2 workpiece is clamped and fixed by the clamping head of the riser clamping clamp 4.

[0038] See Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 To match bicycle handlebar components 1 of different sizes and specifications, the following technical solution is adopted in a preferred embodiment of this utility model: A horizontal tube positioning block position adjustment hole 2-8 or a side limiting block position adjustment hole 2-9 is provided on two sets of upright plates 2-4 symmetrically arranged on the left and right sides of the base plate 2-1; correspondingly, a threaded hole 5-1 is provided on the side wall of the horizontal tube positioning block 5; the horizontal tube positioning block position adjustment hole 2-8 is a vertical elongated hole; the side limiting block position adjustment hole 2-9 is a horizontal elongated hole. In this embodiment, the horizontal tube positioning block 5 can be moved up and down along the vertical elongated hole by a bolt fitted with its side wall threaded hole, thereby adjusting the vertical position of the horizontal tube positioning block 5. Simultaneously, the angle of the horizontal tube positioning block 5 can be adjusted by rotating it at a set angle within the vertical elongated hole using the bolt fitted with its side wall threaded hole; since the side limiting block position adjustment hole 2-9 is a horizontal elongated hole, the horizontal position of the side limiting block 8 can be adjusted to match the length of different horizontal tube 1-1 workpieces. Further optimization of this embodiment involves providing a riser positioning block position adjustment hole 2-6, a riser clamping clamp position adjustment hole 2-7, and a horizontal pipe clamping clamp assembly hole 2-10 on the base plate 2-1. The riser positioning block position adjustment hole 2-6 is a longitudinal elongated hole, which allows for adjustment of the inner and outer positions of the riser positioning block 5. The riser clamping clamp position adjustment hole 2-7 is a transverse elongated hole, which allows for adjustment of the left and right positions of the riser clamping clamp. The horizontal pipe clamping clamp assembly hole 2-10 consists of several sets of circular holes arranged along the central axis of the base plate 2-1. When the horizontal pipe clamping clamp is assembled with circular holes at different positions, the adapter clamp 7 can be matched with horizontal pipe 1-1 workpieces of different sizes.

[0039] See Figures 1 to 9Before welding the bicycle handlebar component 1 using this utility model, the base plate 2-1 of the base 2 can be made horizontal. After placing the workpiece on the base 2, the horizontal tube workpiece can be positioned by the horizontal tube positioning and clamping mechanism and the horizontal tube limiting plate. Then, the horizontal tube workpiece is clamped and fixed by the horizontal tube clamping pliers and the adapter clamping head. Then, the vertical tube workpiece is positioned and clamped and fixed by the vertical tube positioning and clamping mechanism arranged outside the relief groove 2-3 of the welding part of the base plate. Thus, accurate positioning and reliable fixing of the welding workpiece are achieved. When performing the welding operation, the joint of the horizontal tube 1-1 and the vertical tube 1-2 can be welded first. Then, the welding station rotation machine drives the base 2 to rotate 180 degrees in space, and then the other side of the joint of the horizontal tube 1-1 and the vertical tube 1-2 can be welded.

Claims

1. A bicycle handlebar component welding fixture, characterized by: The system includes a base (2), a vertical pipe positioning and clamping mechanism, and a horizontal pipe positioning and clamping mechanism. The base (2) is provided with a base plate (2-1) and a connecting plate (2-2). The connecting plate (2-2) is fixedly installed on the inner end of the base plate (2-1). The base plate (2-1) is connected to the rotating shaft of the indexing machine at the welding station through the connecting plate (2-2). A welding part avoidance groove (2-3) is provided on the base plate (2-1). A horizontal pipe limiting plate (2-5) is provided at the inner edge of the welding part avoidance groove (2-3). Two sets of horizontal pipe limiting plates (2-5) are symmetrically arranged on the left and right sides of the horizontal pipe limiting plate (2-5). Vertical plate (2-4); The vertical pipe positioning and clamping mechanism is installed on the outside of the welding part avoidance groove (2-3) on the base plate (2-1); The horizontal pipe positioning and clamping mechanism includes a horizontal pipe positioning component and a horizontal pipe clamping component. The horizontal pipe positioning component is fitted with two sets of vertical plates (2-4) arranged on the left and right sides of the base plate (2-1). The horizontal pipe positioning component is used to position the horizontal pipe (1-1) workpiece by cooperating with the horizontal pipe limiting plate (2-5) on the base plate (2-1). The horizontal pipe clamping component is installed on the base plate (2-1) and the horizontal pipe (1-1) workpiece is clamped and fixed by the horizontal pipe clamping component.

2. The bicycle handlebar welding fixture according to claim 1, characterized in that: The horizontal tube positioning assembly includes a horizontal tube positioning block (5) and a side limiting block (8); the horizontal tube positioning block (5) consists of two parts arranged symmetrically on the left and right, which are respectively assembled with two sets of upright plates (2-4) arranged on the left and right sides of the base plate (2-1), and a horizontal tube positioning groove matching the outer wall of the horizontal tube (1-1) is provided on the upper end face of the horizontal tube positioning block (5); the side limiting block (8) is installed on the left or right upright plate (2-4) and is located on the outside of the horizontal tube positioning block (5).

3. The bicycle handlebar welding fixture according to claim 2, characterized in that: The horizontal tube clamping assembly includes a horizontal tube clamping clamp (6) and an adapter clamping head (7); the horizontal tube clamping clamp (6) is installed on the base plate (2-1), and its central axis is located in the same plane as the central axis of the horizontal tube limiting plate (2-5) perpendicular to the base plate (2-1), and an adapter clamping head (7) is installed at its clamping end; the adapter clamping head (7) is a U-shaped frame structure, and two vertically downward horizontal tube clamping heads (7-1) are provided at the open end of the U-shaped frame.

4. Bicycle handlebar component welding tool according to claim 1 or 2 or 3, characterized in that: The riser positioning and clamping mechanism includes a riser positioning block (3) and a riser clamping clamp (4); the riser positioning block (3) is installed on the base plate (2-1), and its central axis is located in the same plane as the central axis of the horizontal pipe limiting plate (2-5) perpendicular to the base plate (2-1). A riser positioning groove matching the outer wall of the riser (1-2) is provided on the upper end face of the riser positioning block (3); the riser clamping clamp (4) is arranged on one side of the riser positioning block (3), and the riser (1-2) workpiece placed in the riser positioning groove is clamped and fixed by the clamping head of the riser clamping clamp (4).

5. A bicycle handlebar component welding fixture as claimed in claim 2 or 3, characterized in that: A horizontal tube positioning block position adjustment hole (2-8) is provided on two sets of vertical plates (2-4) arranged on the left and right sides of the base plate (2-1), and a side limit block position adjustment hole (2-9) is provided on one set of vertical plates; correspondingly, a threaded hole (5-1) is provided on the side wall of the horizontal tube positioning block (5), the horizontal tube positioning block position adjustment hole (2-8) is a vertical elongated hole, and the horizontal tube positioning block (5) is assembled with the horizontal tube positioning block position adjustment hole (2-8) on the vertical plate (2-4) by a bolt that mates with the threaded hole on its side wall; the side limit block position adjustment hole (2-9) is a horizontal elongated hole.

6. The bicycle handlebar component welding fixture of claim 4, wherein: The base plate (2-1) is also provided with a riser positioning block position adjustment hole (2-6), a riser clamping clamp position adjustment hole (2-7), and a horizontal pipe clamping clamp assembly hole (2-10); the riser positioning block position adjustment hole (2-6) is a longitudinal long hole; the riser clamping clamp position adjustment hole (2-7) is a transverse long hole; the horizontal pipe clamping clamp assembly hole (2-10) is a number of round holes arranged along the central axis of the base plate (2-1).

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