Fixture for welding bicycle frame

Abstract

The utility model relates to the technical field of bicycle frame welding and clamping equipment, in particular to a bicycle frame welding clamp which comprises a base, a clamping and fixing mechanism assembly is arranged above the base, a supporting mechanism is arranged on one side of the clamping and fixing mechanism assembly, the clamping and fixing mechanism assembly comprises three clamping and fixing mechanisms, and the three clamping and fixing mechanisms are arranged on the base. The clamping and fixing mechanism comprises a first mounting plate, the supporting mechanism comprises a second mounting plate, the clamping and fixing mechanism used for fixing the frame tube in the clamp is simple in structure, angle adjustment is convenient, operation is easy and convenient, the frame tube to be welded can be rapidly clamped and fixed, the welding efficiency of the frame tube is improved, and the welding quality of the frame tube is improved. The supporting mechanism can adjust the distance between the frame head tube and the bottom plate according to the model of the frame, so that the frame head tube is clamped and fixed, and the application range of the supporting mechanism is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of frame welding and clamping equipment, and particularly discloses a clamp for welding a bicycle frame. Background Art

[0002] The bicycle frame is the core component of the bicycle. As the skeleton and main body of the entire bicycle, all other components are directly or indirectly installed. Bicycle frames are made of various materials, including steel, aluminum alloy, carbon fiber and titanium alloy. Bicycle frames are usually composed of top tube, down tube, seat tube and front fork. In the actual production process, welding equipment is usually required to weld these components together to ensure a firm connection. When welding the frame using welding equipment, clamps are required to fix the frame components.

[0003] The Chinese patent number CN220006639U discloses a bicycle frame welding fixture, wherein a bicycle frame steel pipe fixing device is provided on the bottom plate, and the bicycle frame steel pipe fixing device is connected to the bottom plate by bolts, so that the bicycle frame steel pipe fixing device can adjust the corresponding fixing position according to the size of the bicycle frame. The utility model uses the bicycle frame steel pipe fixing device to eliminate the need to stagger the two square steels to be welded and cut them by marking. The bicycle frame steel pipe fixing device can fix three bicycle frame steel pipes to be welded. Rapid limiting and fixing greatly improves processing efficiency. However, during the use of the above-mentioned welding fixture, the mechanism for fixing the frame steel pipe is complicated and inconvenient to operate, and the frame steel pipe to be welded cannot be quickly clamped and fixed, which to a certain extent affects the efficiency of frame steel pipe welding. During use, the above-mentioned welding fixture cannot adjust the distance between the frame head pipe and the bottom plate according to actual needs, so that the frame end limit block cannot be applied to the fixation of various different models of frame head pipes. Therefore, in order to solve the above-mentioned problems, the utility model proposes a bicycle frame welding fixture. Utility Model Content

[0004] The utility model aims to provide a clamp for welding a bicycle frame. The clamp has a simple structure, convenient angle adjustment, and easy operation for fixing the frame tube. The clamp can quickly clamp and fix the frame tube to be welded, thereby improving the efficiency of frame tube welding. The support mechanism can adjust the distance between the frame head tube and the bottom plate according to the model of the frame so as to clamp and fix the frame head tube, thereby improving the applicability of the support mechanism.

[0005] The utility model is realized through the following technical solutions:

[0006] The fixing mechanism of the present invention is a kind of fixing device for welding a bicycle frame, comprises a base, a clamping and fixing mechanism assembly is provided above the base, a supporting mechanism is provided on one side of the clamping and fixing mechanism assembly, the clamping and fixing mechanism assembly comprises three clamping and fixing mechanisms, the clamping and fixing mechanism comprises a first mounting plate, the supporting mechanism comprises a second mounting plate, the tops of the first mounting plate and the second mounting plate are both provided with connecting holes, a U-shaped plate and a connecting plate are respectively provided above the first mounting plate and the second mounting plate, a connecting shaft is respectively provided below the U-shaped plate and the connecting plate, the connecting shaft passes through the interior of the connecting hole, a push plate is provided above the inner side of the U-shaped plate, a plurality of first springs are provided on one side of the push plate, a support plate is provided above the connecting plate, and a guide rod and a threaded rod are respectively passed through at both ends of the support plate.

[0007] As a further setting of the above scheme, the base includes a load-bearing plate, and a plurality of mounting holes are provided on the top of the load-bearing plate, which helps to install the clamping and fixing rod mechanism and the support mechanism at the appropriate position on the load-bearing plate according to the model of the vehicle frame. Two U-shaped frames are symmetrically connected to the bottom of the load-bearing plate, which can provide support for the load-bearing plate and the components above it. Long holes are provided on both sides of the U-shaped frame to facilitate connecting the clamp with the original welding device. A first pin is provided on one side of the U-shaped frame to facilitate connection with the connecting rod. A first slide groove is provided on the opposite sides of the two U-shaped frames. A storage box is provided between the two U-shaped frames to facilitate the placement of nuts, countersunk screws, snap rings and other accessories in the clamp, as well as tools such as wrenches and screwdrivers, which are convenient for workers to use.

[0008] As a further configuration of the above scheme, a first protrusion is provided on both sides of the storage box, and the first protrusion is slidably connected to the first slide groove. A pulling hole is provided on one side of the storage box, which is convenient for workers to put their hands into the pulling hole to pull out the storage box. A second pin rod is provided at one end of the first protrusion close to the pulling hole, and a connecting rod is connected between the second pin rod and the first pin rod, which can fix the storage box under the supporting plate.

[0009] As a further configuration of the above scheme, a plurality of countersunk holes are provided on both sides of the first mounting plate, and countersunk screws are provided inside the countersunk holes, and the lower ends of the countersunk screws are threadedly connected to the mounting holes, which is convenient for adjusting the installation position of the clamping and fixing mechanism according to actual application needs, so that the clamping and fixing mechanism can be applied to the fixation of various different models of frames. A second slide groove is provided inside the U-shaped plate, and limiting holes are provided on both sides of the second slide groove. A first elastic pad is provided on one side of the U-shaped plate, and a second protrusion is provided under the support plate, which can limit the moving direction of the support plate, so that the support plate and the U-shaped plate remain stable during the process of clamping and fixing the frame tube.

[0010] As a further setting of the above scheme, the inside of the second protruding block is provided with a limiting shaft, the second protruding block is in sliding connection with the second sliding groove, the two ends of the limiting shaft are respectively penetrated into the inside of the two limiting holes and are in sliding connection with the limiting holes, the resisting plate can be kept stable during the process of being extruded and moved by the frame tube, and the clamping and fixing effect of the frame tube is ensured, the side of the resisting plate close to the first elastic pad is provided with a second elastic pad, the resisting plate and the U-shaped plate can avoid directly extruding the frame tube, and a buffer is formed between the resisting plate and the U-shaped plate, the other end of the first spring is connected with the U-shaped plate, and the installation and maintenance of the first spring are facilitated.

[0011] As a further setting of the above scheme, the outside of the connecting shaft is provided with a gasket, one side of the gasket is provided with a nut, the nut is in threaded connection with the connecting shaft, the nut can be loosened during use to release the fixation of the U-shaped plate, the connecting plate and other components, so that the angle of the U-shaped plate, the connecting plate and the components above them is adjusted, and after the angle adjustment is completed, the angle of the U-shaped plate and the connecting plate is fixed by tightening the nut.

[0012] As a further setting of the above scheme, the guide rod is in sliding connection with the supporting plate, the movement of the supporting plate can be limited in the up-down movement direction, the threaded rod is in threaded connection with the supporting plate, the lower end of the threaded rod is penetrated into the inside of the connecting plate and is in rotary connection with the connecting plate, the spacing between the supporting plate and the connecting plate can be adjusted by rotating the threaded rod, so that the height at which the frame head pipe is placed is adjusted, the outside of the threaded rod and the guide rod is provided with a plurality of elastic clamps, the supporting plate can be fixed by the friction between the elastic clamps and the supporting plate after the spacing adjustment between the supporting plate, the clamping plate and other components and the connecting plate is completed, the two sides above the supporting plate are provided with clamping plates, one side of the clamping plate is provided with a plurality of second springs, one end of the second spring away from the clamping plate is connected with the supporting plate, the second spring can be deformed by the extrusion of the frame head pipe on the clamping plate, and the frame head pipe can be clamped and fixed by the rebound of the second spring pushing back the clamping plate.

[0013] The utility model has the following beneficial effects in use:

[0014] The design of the storage box in the base facilitates the placement of the nuts, countersunk screws, clamps and other accessories in the clamp, as well as wrenches, screwdrivers and other tools, and is convenient for workers to use, the use of the two connecting rods can fix the storage box between the two U-shaped frames when the storage box is limited, so that the storage box remains stable, and the design of the plurality of mounting holes on the bearing plate facilitates the adjustment of the positions of the clamping and fixing mechanism and the supporting mechanism according to the models of the frame pipes, so that the clamp is suitable for the clamping and fixing of frame pipes of various models.

[0015] The combination of the connecting shaft and the nut in the clamping and fixing mechanism and the supporting mechanism can loosen the nut before the angle adjustment of the U-shaped plate, the connecting plate and the components above the connecting plate, release the fixation of the connecting shaft, and then tighten the nut to fix the connecting shaft after the rotation of the connecting hole and the angle adjustment of the components are completed.

[0016] The combination of the clamping plate and the plurality of second springs can clamp and fix the head pipe of the frame, and the use of the threaded rod and the guide rod can adjust the distance between the components such as the supporting plate and the clamping plate and the connecting plate according to the model of the frame and the diameter of the head pipe of the frame, thereby adjusting the distance between the head pipe of the frame and the connecting plate, and meeting different use requirements. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a perspective view of the present application;

[0019] Figure 2 It is a perspective view of the U-shaped frame in the present application;

[0020] Figure 3 It is a perspective view of the object box in the present application;

[0021] Figure 4 It is a perspective view of the clamping and fixing mechanism in the present application;

[0022] Figure 5 It is a perspective view of the first mounting plate in the present application;

[0023] Figure 6 It is a perspective view of the U-shaped plate in the present application;

[0024] Figure 7 It is a perspective view of the abutting plate in the present application;

[0025] Figure 8 It is a perspective view of the supporting mechanism in the present application;

[0026] Figure 9 It is a perspective view of the supporting plate in the present application.

[0027] Figure: 1. Base; 2. Clamping and fixing mechanism; 3. Support mechanism; 11. Loading plate; 111. Mounting hole; 12. U-shaped frame; 121. Long hole; 122. First slide groove; 123. First pin; 13. Storage box; 131. First protrusion; 132. Pull hole; 133. Second pin; 14. Connecting rod; 21. First mounting plate; 211. Countersunk hole; 212. Connecting hole; 22. Countersunk screw; 23. U-shaped plate ; 231, second slide groove; 2311, limiting hole; 232, first elastic pad; 24, connecting shaft; 241, gasket; 242, nut; 25, abutment plate; 251, second protrusion; 252, limiting shaft; 253, second elastic pad; 26, first spring; 31, second mounting plate; 32, connecting plate; 33, support plate; 34, guide rod; 35, threaded rod; 36, elastic snap ring; 37, splint; 38, second spring. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Figures 1-9 , and describes the application in detail with reference to embodiments.

[0030] The embodiment discloses a clamp for welding a bicycle frame, comprising a base 1, a clamping and fixing mechanism 2 assembly is provided above the base 1, a supporting mechanism 3 is provided on one side of the clamping and fixing mechanism 2 assembly, the clamping and fixing mechanism 2 assembly includes three clamping and fixing mechanisms 2, the clamping and fixing mechanism 2 includes a first mounting plate 21, the supporting mechanism 3 includes a second mounting plate 31, the tops of the first mounting plate 21 and the second mounting plate 31 are both provided with connecting holes 212, a U-shaped plate 23 and a connecting plate 32 are respectively provided above the first mounting plate 21 and the second mounting plate 31, a connecting shaft 24 is provided below the U-shaped plate 23 and the connecting plate 32, the connecting shaft 24 passes through the interior of the connecting hole 212, a push plate 25 is provided above the inner side of the U-shaped plate 23, a plurality of first springs 26 are provided on one side of the push plate 25, a support plate 33 is provided above the connecting plate 32, and a guide rod 34 and a threaded rod 35 are respectively passed through at both ends of the support plate 33.

[0031] like Figure 1 andFigure 2 As shown, the base 1 includes a load-bearing plate 11, and a plurality of mounting holes 111 are provided on the top of the load-bearing plate 11, which helps to install the clamping and fixing rod mechanism and the support mechanism 3 at the appropriate position on the load-bearing plate 11 according to the model of the frame. Two U-shaped frames 12 are symmetrically connected to the bottom of the load-bearing plate 11, which can provide support for the load-bearing plate 11 and the components above it. Long holes 121 are provided on both sides of the U-shaped frame 12, which is convenient for connecting the clamp to the original welding device. A first pin 123 is provided on one side of the U-shaped frame 12, which is convenient for connecting with the connecting rod 14. A first slide groove 122 is provided on the opposite sides of the two U-shaped frames 12, and a storage box 13 is provided between the two U-shaped frames 12, which is convenient for placing accessories such as nuts 242, countersunk screws 22 and snap rings in the clamp, as well as tools such as wrenches and screwdrivers, for workers to use.

[0032] like Figure 1 and Figure 3 As shown, first protrusions 131 are provided on both sides of the storage box 13, and the first protrusions 131 are slidably connected to the first slide groove 122. A pulling hole 132 is provided on one side of the storage box 13, which is convenient for workers to reach into the pulling hole 132 to pull out the storage box 13. A second pin rod 133 is provided at one end of the first protrusion 131 close to the pulling hole 132, and a connecting rod 14 is connected between the second pin rod 133 and the first pin rod 123, which can fix the storage box 13 under the supporting plate 11.

[0033] like Figure 1 、 Figure 4 、 Figure 5 and Figure 7 As shown, a plurality of countersunk holes 211 are provided on both sides of the first mounting plate 21, and countersunk screws 22 are provided inside the countersunk holes 211. The lower ends of the countersunk screws 22 are threadedly connected to the mounting holes 111, which is convenient for adjusting the installation position of the clamping and fixing mechanism 2 according to actual application needs, so that the clamping and fixing mechanism 2 can be applied to the fixation of various different types of frames. A second slide groove 231 is provided inside the U-shaped plate 23, and limiting holes 2311 are provided on both sides of the second slide groove 231. A first elastic pad 232 is provided on one side of the U-shaped plate 23, and a second protrusion 251 is provided under the abutment plate 25, which can limit the moving direction of the abutment plate 25, so that the abutment plate 25 and the U-shaped plate 23 remain stable during the process of clamping and fixing the frame tube.

[0034] like Figure 1 、 Figure 4 and Figure 7As shown, the inside of the second protruding block 251 is provided with a limiting shaft 252, the second protruding block 251 is in sliding connection with the second sliding groove 231, both ends of the limiting shaft 252 are respectively penetrated into the inside of two limiting holes 2311 and are in sliding connection with the limiting holes 2311, so that the resisting plate 25 can be kept stable during the extrusion movement of the frame tube, and the clamping and fixing effect of the frame tube is guaranteed, one side of the resisting plate 25 close to the first elastic pad 232 is provided with a second elastic pad 253, so that the resisting plate 25 and the U-shaped plate 23 can avoid directly extruding the frame tube, and a buffer is formed between the resisting plate 25 and the U-shaped plate 23, the other end of the first spring 26 is connected with the U-shaped plate 23, so that the installation and maintenance of the first spring 26 are facilitated.

[0035] As shown in Figure 6 , the outer side of the connecting shaft 24 is provided with a gasket 241, one side of the gasket 241 is provided with a nut 242, the nut 242 is in threaded connection with the connecting shaft 24, so that the nut 242 can be loosened during use to release the fixation of the U-shaped plate 23, the connecting plate 32 and other components, so as to adjust the angle of the U-shaped plate 23, the connecting plate 32 and the components above them, and after the angle adjustment is completed, the nut 242 is tightened to fix the angle of the U-shaped plate 23 and the connecting plate 32.

[0036] As shown in Figure 1 , Figure 8 , and Figure 9 , the guide rod 34 is in sliding connection with the supporting plate 33, so that the upward and downward movement direction of the supporting plate 33 can be limited, the threaded rod 35 is in threaded connection with the supporting plate 33, the lower end of the threaded rod 35 is penetrated into the inside of the connecting plate 32 and is in rotating connection with the connecting plate 32, so that the spacing between the supporting plate 33 and the connecting plate 32 can be adjusted by rotating the threaded rod 35, thereby adjusting the height of the frame head tube, the outer sides of the threaded rod 35 and the guide rod 34 are both provided with a plurality of elastic clamping rings 36, so that after the spacing adjustment between the supporting plate 33, the clamping plate 37 and other components and the connecting plate 32 is completed, the supporting plate 33 can be fixed by the friction between the elastic clamping ring 36 and the supporting plate 33, both sides above the supporting plate 33 are provided with clamping plates 37, one side of the clamping plate 37 is provided with a plurality of second springs 38, one end of the second spring 38 away from the clamping plate 37 is connected with the supporting plate 33, so that the second spring 38 can be deformed by extruding the clamping plate 37 by the frame head tube, and the frame head tube can be clamped and fixed by the second spring 38 pushing back the clamping plate 37.

[0037] The bicycle frame welding fixture disclosed in this embodiment is connected to the existing welding device before use. A welded frame is placed on top of the fixture as a reference frame. Referring to the position of the steel pipe and head pipe in the frame, the three clamping and fixing mechanisms 2 and the support mechanism 3 are installed in the appropriate position on the bearing plate 11. The nuts 242 under the three clamping and fixing mechanisms 2 and the support mechanism 3 are loosened in turn using a wrench, and the angles of the U-shaped plate 23, the connecting plate 32 and the components above them are adjusted to the appropriate After the long sides of the support plate 33 and the three abutment plates 25 are respectively parallel to the center lines of the frame head tube and the three frame steel tubes, tighten the nut 242 to fix the angle of the U-shaped plate 23, the connecting plate 32 and the components above them, rotate the threaded rod 35 according to the diameter of the frame head tube in the reference frame to adjust the vertical spacing between the support plate 33 and the clamping plate 37 and the connecting plate 32 and use the elastic snap ring 36 to fix it, so that the support plate 33 provides support for the frame head tube when the clamping plate 37 clamps the frame head tube, and move the reference frame away.

[0038] The three frame steel pipes to be welded are respectively placed between the abutment plates 25 and the U-shaped plates 23 in the corresponding clamping and fixing mechanisms 2, so that the frame steel pipes are squeezed by the first elastic pads 232 and the second elastic pads 253 on the U-shaped plates 23 and the abutment plates 25, thereby the frame steel pipes are clamped and fixed in place by the rebound energy of the first spring 26. During the squeezing process, the second protrusion 251 slides in the second slide groove 231, and the two ends of the limiting rod slide in the limiting hole 2311, and the frame head pipe is placed between the two clamping plates 37 above the support mechanism 3, so that the two clamping plates 37 clamp the frame head pipe in place. Then, the welding device can be used to weld the frame steel pipe and the bicycle joint pipe to form a bicycle frame. The welded frame is removed from the clamping and fixing mechanism 2 assembly and the support mechanism 3, and the squeezing of the first spring 26 and the second spring 38 is released to reset the abutment plates 25 and the clamping plates 37. Then, the above operation can be repeated to continue welding bicycle frames of the same model.

[0039] When different types of bicycle frames need to be welded, the above operations of adjusting the positions of the clamping and fixing mechanism 2 and the supporting mechanism 3 and the angles of their respective upper components need only be repeated, so that the clamping and fixing mechanism 2 and the supporting mechanism 3 can be used to fix the frame steel tubes and frame head tubes in different types of bicycle frames.

[0040] The first pin rod 123, the storage box 13, the second pin rod 133, the counterbore hole 211, the countersunk screw 22, the first elastic pad 232, the connecting shaft 24, the gasket 241, the nut 242, the limiting shaft 252, the second elastic pad 253, the first spring 26, the guide rod 34, the threaded rod 35, the elastic snap ring 36, the second spring 38 and other components in the bicycle frame welding clamp are all general standard components or components known by those skilled in the art, and the structure and principle thereof can be known by the technical personnel through a technical manual or through a conventional experimental method.

[0041] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A bicycle frame welding fixture, comprising a base, characterized in that: A clamping and fixing mechanism assembly is provided above the base, and a supporting mechanism is provided on one side of the clamping and fixing mechanism assembly, and the clamping and fixing mechanism assembly includes three clamping and fixing mechanisms, and the clamping and fixing mechanism includes a first mounting plate, and the supporting mechanism includes a second mounting plate, and the tops of the first mounting plate and the second mounting plate are both provided with connecting holes, and a U-shaped plate and a connecting plate are respectively provided above the first mounting plate and the second mounting plate, and a connecting shaft is provided below the U-shaped plate and the connecting plate, and the connecting shaft passes through the interior of the connecting hole, and a push plate is provided above the inner side of the U-shaped plate, and a plurality of first springs are provided on one side of the push plate, and a support plate is provided above the connecting plate, and a guide rod and a threaded rod are respectively passed through the two ends of the support plate.

2. A bicycle frame welding fixture according to claim 1, characterized in that: The base includes a supporting plate, a plurality of mounting holes are provided on the top of the supporting plate, two U-shaped frames are symmetrically connected below the supporting plate, long holes are provided on both sides of the U-shaped frame, a first pin is provided on one side of the U-shaped frame, a first slide groove is provided on the opposite sides of the two U-shaped frames, and a storage box is provided between the two U-shaped frames.

3. A bicycle frame welding fixture according to claim 2, characterized in that: A first protrusion is provided on both sides of the storage box, and the first protrusion is slidably connected to the first sliding groove. A pulling hole is provided on one side of the storage box, and a second pin is provided on one end of the first protrusion close to the pulling hole, and a connecting rod is connected between the second pin and the first pin.

4. The bicycle frame welding fixture according to claim 1, characterized in that: A plurality of countersunk holes are provided on both sides of the first mounting plate, countersunk screws are provided through the inside of the countersunk holes, and the lower ends of the countersunk screws are threadedly connected to the mounting holes. A second slide groove is provided inside the U-shaped plate, and limiting holes are provided on both sides of the second slide groove. A first elastic pad is provided on one side of the U-shaped plate, and a second protrusion is provided under the abutment plate.

5. The bicycle frame welding fixture according to claim 4, characterized in that: A limiting shaft is provided inside the second protrusion, and the second protrusion is slidably connected to the second slide groove. The two ends of the limiting shaft respectively pass through the interior of the two limiting holes and are slidably connected to the limiting holes. A second elastic pad is provided on the side of the abutment plate close to the first elastic pad, and the other end of the first spring is connected to the U-shaped plate.

6. The bicycle frame welding fixture according to claim 1, characterized in that: A gasket is provided on the outer side of the connecting shaft, a nut is provided on one side of the gasket, and the nut is threadedly connected to the connecting shaft.

7. The bicycle frame welding fixture according to claim 1, characterized in that: The guide rod is slidably connected to the support plate, the threaded rod is threadedly connected to the support plate, the lower end of the threaded rod passes through the interior of the connecting plate and is rotatably connected to the connecting plate, a plurality of elastic snap rings are provided on the outer sides of the threaded rod and the guide rod, and splints are provided on both sides above the support plate, and a plurality of second springs are provided on one side of the splint, and the end of the second spring away from the splint is connected to the support plate.

Images