Welding fixture

Abstract

The utility model relates to the technical field of welding fixtures, and discloses a welding fixture which comprises a rack, a fixing column is fixedly connected to the top of the rack, a fixture is arranged at the top of the rack, a lifting assembly is arranged on the outer wall of the fixing column, and a rotating assembly is arranged at the top of the rack. The lifting assembly comprises an electric push rod, the bottom of the electric push rod is fixedly connected to the top of the rack, a support is fixedly connected to the top of the rack, a first rotating column is fixedly connected to the interior of the support, a rack is slidably connected to the interior of the fixing column, and the two ends of the first rotating column are each rotationally connected with two first gears. According to the lifting device, the electric push rod is started to drive the bottom plate to move and enable the rack to move, the gear I is meshed with the rack to drive the gear to rotate and enable the rotating column I to move, so that the lifting of the bottom plate is realized, a clamp with a fixed height does not need to be independently designed for each vehicle type or part, and the universality of the clamp is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding fixture technical field especially relates to a welding fixture. BACKGROUND

[0002] With the rapid development of locomotive manufacturing and other industries, the vehicle model is increasingly diversified, the shape, size and welding requirement of the spare part are more and more complex, in order to guarantee the welding quality, improve the assembly precision and production efficiency, the universality, flexibility and adaptability of the welding fixture are put forward to higher requirement, the traditional welding fixture is applicable to single vehicle model or specific type spare part, in the face of the constantly updated product, the fixture needs to be designed and replaced frequently, this not only consumes a large amount of time and resources, also influences the production progress and cost control.

[0003] The common welding fixture mainly has fixed type and manual drive, and the fixture structure is simple, low in cost, but the universality is poor, once the shape or size of workpiece changes, the fixture needs to be redesigned and manufactured, the welding fixture of manual drive relies on manpower operating lever, screw rod and other mechanical devices to realize clamping and positioning function, the advantages are simple structure, convenient operation, and are applicable to small batch, simple workpiece welding, but the disadvantages are high labor intensity, low efficiency, and the size and stability of clamping force are difficult to guarantee.

[0004] When the workpiece size difference or load distribution is uneven, the lifting speed and displacement of each fixed column are difficult to keep consistent, leading to the inclination of the bearing platform, and the inclination not only destroys the initial positioning accuracy of the workpiece, but also makes the welding stress distribution uneven, and causes the welding seam deformation or cracking, especially in the welding of large workpieces such as ship deck and pressure vessel cylinder, the cooperative error accumulation effect of multiple fixtures is significant, therefore, a welding fixture is provided to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a welding fixture, which aims at improving the problem of asynchronous lifting between fixed columns in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A welding fixture, comprising a rack, a fixed column is fixedly connected to the top of the rack, a clamp is arranged on the top of the rack, a lifting assembly is arranged on the outer wall of the fixed column, and a rotating assembly is arranged on the top of the rack.

[0008] The lifting assembly includes an electric push rod, the electric push rod is fixedly connected at the bottom of the rack, a support is fixedly connected at the top of the rack, a rotating column one is fixedly connected inside the support, a rack is slidably connected inside the fixed column, two gear wheels one are rotatably connected at the two ends of the rotating column one, the rack is engaged with the gear wheels one, the gear wheels one are rotatably connected to the inner wall of the fixed column, a bottom plate is fixedly connected at the top of the rack, and a clamping column is fixedly connected to the outer wall of the rack.

[0009] As a further description of the above technical solution:

[0010] The rotating assembly includes a connecting frame, the connecting frame is fixedly connected with a motor at the top, and a rotating rod is fixedly connected to the output end of the motor.

[0011] As a further description of the above technical solution:

[0012] The connecting frame is fixedly connected at the top of the bottom plate, and a limiting column is fixedly connected to the side wall of the rotating rod.

[0013] As a further description of the above technical solution:

[0014] A rotating column two is rotatably connected at the top of the connecting frame, and a placing plate is fixedly connected at the bottom of the rotating column two.

[0015] As a further description of the above technical solution:

[0016] A sliding groove is formed in the inner part of the placing plate, and the limiting column is slidably connected to the inner wall of the sliding groove.

[0017] As a further description of the above technical solution:

[0018] A sector gear is fixedly connected to the outer wall of the rotating column two, and a gear wheel two is rotatably connected at the top of the connecting frame.

[0019] As a further description of the above technical solution:

[0020] The sector gear is engaged with the gear wheel two, and the side wall of the gear wheel two is fixedly connected to one side of the clamp.

[0021] The utility model has the advantages of:

[0022] 1、 in the utility model, the electric push rod is started, the bottom plate is driven to move, the rack is displaced, the gear wheel one is engaged with the rack, the gear wheel is driven to rotate, the rotating column one is moved, the stable movement effect is achieved, the problem that the fixed columns are not synchronous in lifting is avoided, the stable lifting of the whole bottom plate is ensured, and the working efficiency is improved.

[0023] 2. The utility model discloses, through starting motor, can drive the rotation of the rotation pole, make the limiting post slide in the sliding slot, and then drive the swing of the placing plate, make the sector gear rotate, because sector gear is engaged with gear, and then drive gear no. 2 rotation, thereby drive the rotation of the clamp, avoid the operation visual field blind area that produces because workpiece angle is not good, and operating personnel can clearly observe the operation part, reduce the operation mistake that causes the line of sight is blocked, improve the welding efficiency and quality. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A kind of welding fixture perspective view is provided for the utility model;

[0025] Figure 2 A kind of welding fixture fixed column section structure schematic view is provided for the utility model;

[0026] Figure 3 A kind of welding fixture connecting frame structure schematic view is provided for the utility model.

[0027] LEGEND:

[0028] 1, rack;2, fixed column;3, support;4, rack;5, gear no. 1;6, rotation post no. 1;7, electric push rod;8, motor;9, connecting frame;10, rotation pole;11, limiting post;12, placing plate;13, sliding slot;14, rotation post no. 2;15, sector gear;16, gear no. 2;17, clamp;18, bottom plate;19, clamping post. DETAILED DESCRIPTION

[0029] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0030] Referring to Figure 1 and Figure 2 , the utility model provides an embodiment: a kind of welding fixture, including rack 1, rack 1 top is connected by bolt fixed with fixed column 2, rack 1 top is provided with clamp 17, and fixed column 2 outer wall is provided with lifting assembly, and rack 1 top is provided with rotating assembly;

[0031] The lifting assembly comprises an electric push rod 7 fixedly connected at the top of the rack 1, a support 3 fixedly connected at the top of the rack 1, the support 3 being made of cast steel and having rigidity and anti-deformation capability, a rotating column I 6 fixedly connected inside the support 3, a rack 4 slidingly connected inside the fixed column 2 and made of carburized steel, the rack 4 being connected with the bottom plate 18 at the back through T bolts to realize vertical motion transmission, two gear wheels I 5 rotatably connected at both ends of the rotating column I 6, the rack 4 being engaged with the gear wheels I 5, the gear wheels I 5 being rotatably connected to the inner wall of the fixed column 2, and the rack 4 being fixedly connected with a clamping column 19 at the outer wall.

[0032] Specifically, in the related field of automobile manufacturing, when the sizes and welding positions of parts of different vehicle models are different, the electric push rod 7 is started to drive the bottom plate 18 connected thereto to move, the rack 4 is driven by the bottom plate 18 to displace, and the rack 4 on the other side is also driven to move synchronously, because the rack 4 is engaged with the gear wheels I 5, when the rack 4 displaces, the gear wheels I 5 are driven to rotate, and then the rotating column I 6 is driven to move, the movement of the rotating column I 6 drives the bottom plate 18 to displace, and the lifting operation of the bottom plate 18 is realized, so as to ensure that the load and external force can be borne during lifting, the stability of the structure is maintained, and problems such as inclination do not occur.

[0033] With reference to Figure 1 and Figure 3 , the rotating assembly comprises a connecting frame 9, a motor 8 fixedly connected at the top of the connecting frame 9, a rotating rod 10 fixedly connected at the output end of the motor 8 and made of cast steel and having rigidity and stability, the connecting frame 9 being fixedly connected at the top of the bottom plate 18 through a plurality of high-strength bolts to ensure that the motor 8 does not shake or displace during operation, thereby ensuring the working stability of the entire rotating assembly, a limiting column 11 fixedly connected at the side wall of the rotating rod 10, the rotating rod 10 being made of 45# steel and having high strength and toughness, a rotating column II 14 rotatably connected at the top of the connecting frame 9, the rotating column II 14 being made of stainless steel and having corrosion resistance and surface smoothness, a placement plate 12 fixedly connected at the bottom of the rotating column II 14, a sliding groove 13 formed inside the placement plate 12, the limiting column 11 being slidingly connected at the inner wall of the sliding groove 13, a sector gear 15 fixedly connected at the outer wall of the rotating column II 14, the sector gear 15 being made of alloy steel and having a gradually opened tooth shape to ensure the stability and accuracy of transmission, a gear wheel II 16 rotatably connected at the top of the connecting frame 9, the gear wheel II 16 also being made of alloy steel and having a tooth shape matched with that of the sector gear 15, the sector gear 15 being engaged with the gear wheel II 16, and the gear wheel II 16 being fixedly connected at one side of a clamp 17 for clamping a locomotive workpiece to be welded.

[0034] Specifically, in the complex process of locomotive manufacturing and maintenance, the multi-angle adjustment of the locomotive parts is a crucial operation. First, the motor 8 is started to drive the rotating rod 10 to rotate. With the rotation of the rotating rod 10, the limiting column 11 connected thereto is driven by the driving force of the rotating rod 10 to start displacement, and then drives the limiting column 11 to slide in the sliding groove 13. At the same time, the placement plate 12 also starts corresponding movement. The top of the placement plate 12 takes the rotating column II 14 as the center axis and support point to swing regularly in the external space, which drives the sector gear 15 to rotate. The sector gear 15 rotates under the drive of the placement plate 12, and the sector gear 15 is engaged with the gear II 16. When the sector gear 15 rotates, the gear II 16 is driven to rotate, thereby driving the clamp 17 to rotate. At this time, the welder can rotate the clamp 17 to any desired angle according to the actual welding requirements.

[0035] Working principle: When facing different sizes of parts and welding positions of different vehicle models, the electric push rod 7 is started to drive the bottom plate 18 to move, and then drive the rack 4 to displace, so that the other side rack 4 also moves synchronously. Because the rack 4 is engaged with the gear I 5, the gear I 5 is driven to rotate, thereby driving the rotating column I 6 to move, so as to lift the bottom plate 18 to ensure that it can bear load and external force during lifting, maintain the stability of the structure, and prevent tilting and other problems.

[0036] When the multi-angle adjustment of the locomotive parts is needed, the motor 8 is started to drive the rotating rod 10 to rotate, and then drive the limiting column 11 to displace, and then drive the limiting column 11 to slide in the sliding groove 13. At the same time, the top of the placement plate 12 swings outside the rotating column II 14, thereby driving the sector gear 15 to rotate. Because the sector gear 15 is engaged with the gear II 16, the gear II 16 is driven to rotate, thereby driving the clamp 17 to rotate. The welder can rotate the clamp 17 to any angle according to the actual requirements, so that the welding position can be presented at the best viewing angle and operation angle, avoiding the inconvenience caused by space limitation or poor welding position, and improving the welding efficiency and quality.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A welding fixture comprising a frame (1), characterized in that: The top of the rack (1) is fixedly connected with a fixed column (2), the top of the rack (1) is provided with a clamp (17), the outer wall of the fixed column (2) is provided with a lifting assembly, and the top of the rack (1) is provided with a rotating assembly; The lifting assembly comprises an electric push rod (7), the bottom of the electric push rod (7) is fixedly connected with the top of the rack (1), the top of the rack (1) is fixedly connected with a support (3), the inside of the support (3) is fixedly connected with a rotating column one (6), the inside of the fixed column (2) is slidably connected with a rack (4), both ends of the rotating column one (6) are rotatably connected with two gear one (5), the rack (4) is engaged with the gear one (5), the outer wall of the gear one (5) is rotatably connected with the inner wall of the fixed column (2), the top of the rack (4) is fixedly connected with a bottom plate (18), and the outer wall of the rack (4) is fixedly connected with a clamping column (19).

2. A welding fixture according to claim 1, wherein: The rotating assembly comprises a connecting frame (9), the top of the connecting frame (9) is fixedly connected with a motor (8), and the output end of the motor (8) is fixedly connected with a rotating rod (10).

3. A welding fixture according to claim 2, wherein: The bottom of the connecting frame (9) is fixedly connected with the top of the bottom plate (18), and the side wall of the rotating rod (10) is fixedly connected with a limiting column (11).

4. A welding fixture according to claim 3, wherein: The top of the connecting frame (9) is rotatably connected with a rotating column two (14), and the bottom of the rotating column two (14) is fixedly connected with a placing plate (12).

5. A welding fixture according to claim 4, wherein: The inside of the placing plate (12) is provided with a sliding groove (13), and the outer wall of the limiting column (11) is slidably connected with the inner wall of the sliding groove (13).

6. A welding fixture according to claim 5, wherein: The outer wall of the rotating column two (14) is fixedly connected with a sector gear (15), and the top of the connecting frame (9) is rotatably connected with a gear two (16).

7. A welding fixture according to claim 6, wherein: The sector gear (15) is engaged with the gear two (16), and the side wall of the gear two (16) is fixedly connected with one side of the clamp (17).

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