Fixture for portal frame welding reversible deformation

Abstract

The fixture comprises a positioning base, the positioning base comprises a bottom plate and two sets of positioning pieces arranged on the upper end face of the bottom plate, a screw is arranged at the position, located in the middle of the two sets of positioning pieces, of the upper end face of the bottom plate, and a pressing plate and a locking nut are arranged on the peripheral face of the screw in a sleeved mode. The locking nut is in threaded connection with the screw rod and is configured to limit upward movement of the pressing plate, the positioning piece comprises a first vertical plate and a second vertical plate which are installed on the upper end face of the bottom plate side by side, and clamping rods are installed on the first vertical plate and the second vertical plate. The clamping device is simple in structure, and can be adjusted and replaced through the clamping rods and the screw rods, so that the clamping device has relatively high compatibility to portals with different opening sizes and portals with different channel steel widths; secondly, the clamp can be independently used and also can be fixed on a positioner for use, only the base needs to be fixed, and the welding requirements of different scenes can be met; and meanwhile, the clamp can be used for clamping only by a plurality of screws, and is convenient and quick.

Description

Technical Field

[0001] The utility model relates to the technical field of forklift door frame welding, in particular to a clamp used for door frame welding anti-deformation. Background Art

[0002] The forklift mast is the main load-bearing structure of the forklift pickup device. The mechanism for lifting goods is also called the mast. It consists of an inner mast, an outer mast, a fork frame, a fork, a sprocket, a chain, a lifting cylinder and a tilting cylinder. The forklift mast needs to be welded during the assembly process. Due to the structural characteristics of the mast, the mast opening size changes greatly during the welding process. The current process does not control the opening size during the mast welding process. It is necessary to design a fixture for anti-deformation control during the mast welding process. Utility Model Content

[0003] The utility model aims to provide a clamp for anti-deformation of door frame welding, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a clamp for anti-deformation of gantry welding, comprising a positioning base, the positioning base comprising a bottom plate and two groups of positioning parts arranged on the upper end surface of the bottom plate, a screw is provided on the upper end surface of the bottom plate located in the middle of the two groups of positioning parts, and a pressure plate and a locking nut are sleeved on the outer circumference of the screw, the locking nut is threadedly connected to the screw, and is configured to limit the upward movement of the pressure plate, the positioning part comprises a first vertical plate and a second vertical plate installed in parallel on the upper end surface of the bottom plate, and clamping rods are installed on the first vertical plate and the second vertical plate.

[0005] As a further solution of the utility model: a handle for assisting the rotation of the clamping rod is inserted at the end of the clamping rod.

[0006] As a further solution of the utility model: the two clamping rods are respectively threadedly connected to the first vertical plate and the second vertical plate.

[0007] As a further solution of the utility model: at least one auxiliary rod is provided on the outer peripheral surface of the locking nut.

[0008] As a further solution of the utility model: a threaded countersunk hole is opened in the center area of ​​the upper end surface of the bottom plate, and the threaded countersunk hole is adapted to the end of the screw rod.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. The clamping rod and the screw can be adjusted and replaced, so it has high compatibility with gantries of different opening sizes and different channel steel widths. Secondly, this clamp can be used alone or fixed on a positioner. It only needs to fix the base, which can be used for welding needs in different scenarios. At the same time, the clamp only needs a few screws to clamp it, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the fixture structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the positioning base structure of the utility model;

[0013] Figure 3 It is a product schematic diagram of the utility model;

[0014] Figure 4 This is a schematic diagram of the clamp of the utility model placing a product to be clamped;

[0015] Figure 5 This is a schematic diagram of clamping completed by the clamp of the utility model;

[0016] In the figure: 1. positioning base; 1-1. first vertical plate; 1-2. second vertical plate; 1-3. bottom plate; 2. handle; 3. clamping rod; 4. pressure plate; 5. screw rod; 6. locking nut. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-5 In an embodiment of the utility model, a clamp for anti-deformation of door frame welding includes a positioning base 1, the positioning base 1 includes a bottom plate 1-3 and two groups of positioning parts arranged on the upper end surface of the bottom plate 1-3, a screw 5 is provided on the upper end surface of the bottom plate 1-3 at a position located in the middle of the two groups of positioning parts, and a pressure plate 4 and a locking nut 6 are sleeved on the outer circumference of the screw 5, and at least one auxiliary rod is provided on the outer circumference of the locking nut 6, and the locking nut 6 is threadedly connected to the screw 5, and is configured to limit the upward movement of the pressure plate 4, and the positioning parts include a first vertical plate 1-1 and a second vertical plate 1-2 installed in parallel on the upper end surface of the bottom plate 1-3, and a clamping rod 3 is installed on the first vertical plate 1-1 and the second vertical plate 1-2.

[0019] Specifically, the positioning base 1 is a welded part, in which a certain distance is maintained between the first vertical plate 1-1 and the second vertical plate 1-2 welded on the base plate 1-3, so that the clamp can meet the compatibility of the door frame assembly with a certain range of opening sizes; secondly, the locking nut 6 on the screw 5 is rotated to tighten and fix the pressure plate 4 on the door frame assembly in the vertical direction.

[0020] See also Figure 1 In one embodiment, in order to facilitate the staff to rotate the clamping rod 3, in this embodiment, preferably, a handle 2 for assisting the rotation of the clamping rod 3 is inserted at the end of the clamping rod 3. By inserting the handle 2 into the clamping rod 3, it is convenient for the staff to better bear the force when rotating the clamping rod 3.

[0021] See also Figure 1 In one embodiment, in order to clamp the portal frame assembly, in this embodiment, preferably, the two clamping rods 3 are respectively threadedly connected to the first vertical plate 1-1 and the second vertical plate 1-2, and are used for horizontal compression of the portal frame assembly by screwing in and out of the threads.

[0022] The working principle and usage process of the utility model are as follows: the clamp is placed on the platform or welding positioner according to the welding scene: the pressure plate 4 and the locking nut 6 are removed, and then the four clamping rods 3 are respectively screwed out to a certain distance through the four handles 2 to ensure that the gantry assembly can be placed on the clamp; then the gantry assembly is lifted and placed on the clamp, so that the lower surface of the channel steel wing plate of the gantry assembly fits with the bottom plate 1-3 of the clamp, and the channel steels on the left and right sides of the gantry assembly fall between the two sets of positioning parts of the bottom plate 1-3 respectively, and then the four clamping rods 3 are respectively tightened through the four handles 2 so that the tops of the clamping rods 3 fit with the inner and outer surfaces of the channel steel web of the gantry assembly respectively, thereby completing the clamping of the gantry assembly in the horizontal opening direction to ensure that the horizontal opening direction of the gantry will not be deformed due to the presence of the clamp during the welding process; take the pressure plate 4 so that its middle hole falls downward to the surface of the channel steel wing plate of the gantry assembly through the screw 5. 4, and then the four clamping rods 3 are unscrewed to a certain distance and size without interfering with the gantry assembly. Then the gantry assembly is hoisted out and transported away, thereby completing the demoulding.

[0023] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0024] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A clamp for anti-deformation of gantry welding, comprising a positioning base (1), characterized in that: The positioning base (1) comprises a base plate (1-3) and two groups of positioning parts arranged on the upper end surface of the base plate (1-3); a screw rod (5) is arranged at a position in the middle of the two groups of positioning parts on the upper end surface of the base plate (1-3); and a pressure plate (4) and a locking nut (6) are sleeved on the outer circumference of the screw rod (5); the locking nut (6) is threadedly connected to the screw rod (5) and is configured to limit the upward movement of the pressure plate (4); the positioning parts comprise a first vertical plate (1-1) and a second vertical plate (1-2) installed in parallel on the upper end surface of the base plate (1-3); and clamping rods (3) are installed on both the first vertical plate (1-1) and the second vertical plate (1-2).

2. The fixture for anti-deformation of gantry welding according to claim 1 is characterized in that: The end of the clamping rod (3) is plugged with a handle (2) for assisting the clamping rod (3) in rotating.

3. The fixture for anti-deformation of gantry welding according to claim 1 is characterized in that: The two clamping rods (3) are respectively threadedly connected to the first vertical plate (1-1) and the second vertical plate (1-2).

4. The fixture for anti-deformation of gantry welding according to claim 1 is characterized in that: The outer peripheral surface of the locking nut (6) is provided with at least one auxiliary rod.

5. The fixture for anti-deformation of gantry welding according to claim 1 is characterized in that: A threaded countersunk hole is provided in the center area of ​​the upper end surface of the bottom plate (1-3), and the threaded countersunk hole is adapted to the end of the screw rod (5).

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