A special anti-toppling fixture for grab bucket assembly

Abstract

The utility model provides a kind of special anti-toppling jig for grab assembly, it is related to the assembly auxiliary equipment field of grab production and manufacture, it includes bottom support, two vertical supports are fixed on the bottom support, two the vertical support is spaced and parallelly arranged along the length direction of bottom support, and all vertical to the plane where bottom support is, the lower end of vertical support is fixedly connected with bottom support by welding mode, the upper end of vertical support is provided with circular slot, the radian of circular slot is compatible with the radian of outer circumferential surface of grab middle beam shaft, the utility model solves the technical problem that operating personnel in the middle beam bottom operating surface faces high-altitude falling risk when grab assembly in prior art, operation space is small, leading to big operation difficulty and welding fume is difficult to diffuse and harm health.

Description

Technical Field

[0001] This utility model relates to the field of assembly auxiliary equipment for grab bucket manufacturing, and in particular to a special anti-tipping jig for grab bucket assembly. Background Technology

[0002] Grab buckets, as important material handling equipment, are widely used in material loading, unloading, and handling operations in various industries such as ports, mines, and construction. Their precise structure and assembly quality directly affect operational safety and efficiency; therefore, the rationality of the assembly process and the standardization of operations are particularly crucial in the production and manufacturing of grab buckets.

[0003] In traditional grab bucket assembly processes, the middle beam is typically assembled while the bucket is upright. During operation, the grab bucket is first fixed in an upright position, and workers enter the space under the middle beam to perform welding and bolt tightening operations. To complete assembly tasks at different heights, workers need to frequently climb using climbing equipment to complete a series of delicate operations, such as installing anti-rotation plates and tightening bolts, within the confined space under the middle beam. The entire assembly process relies on manual, step-by-step advancement within a specific space to ensure that the connection accuracy between the middle beam and the bucket meets usage requirements.

[0004] However, existing technologies have obvious shortcomings: when workers are working at the bottom of the beam, they face the direct risk of components or tools falling from above; the narrow space at the bottom of the beam not only makes welding and bolt installation difficult, but also makes it difficult for welding fumes to disperse, which can easily harm the health of workers if they work for a long time. Utility Model Content

[0005] This application provides a special anti-tipping jig for grab bucket assembly, which solves the technical problems in the prior art where workers face the risk of falling from height when working at the bottom of the middle beam during grab bucket assembly, the difficulty of operation due to the narrow operating space, and the health hazards caused by the difficulty of dispersing welding fumes.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a special anti-tipping fixture for grab bucket assembly, including a bottom bracket, on which two vertical supports are fixed. The two vertical supports are spaced apart and parallel along the length direction of the bottom bracket, and are both perpendicular to the plane where the bottom bracket is located. The lower end of the vertical support is fixedly connected to the bottom bracket by welding. The upper end of the vertical support is provided with an arc groove, the curvature of which matches the curvature of the outer circumference of the beam axis of the grab bucket.

[0007] When in use, the bottom of the grab bucket's central beam shaft is supported by the arc grooves at the upper ends of the two vertical supports, keeping the grab bucket in a stable, erected state. Workers can perform assembly operations on the outside of the bottom of the central beam. Since the two vertical supports are supported by the bottom bracket and are set in parallel, the arc grooves at their upper ends can fit against the bottom of the central beam shaft to limit the grab bucket's swaying and effectively prevent the grab bucket from tipping over. Therefore, workers do not need to enter the narrow space at the bottom of the central beam, which avoids the direct risk of components or tools falling from a height and allows welding, bolt installation, and other operations to be carried out in an open space, reducing the difficulty of operation. At the same time, it facilitates the diffusion of welding fumes and reduces the harm to personnel's health.

[0008] As a further improvement to the above solution, the bottom support includes a horizontally arranged support beam. Two transverse rods are vertically welded to both ends of the support beam, with the length direction of the two transverse rods perpendicular to the length direction of the support beam. A longitudinal rod is welded between the two transverse rods, with both ends of the longitudinal rod welded to the ends of the two transverse rods furthest from the support beam. The longitudinal rod is parallel to the support beam. Since the bottom support forms a closed rectangular frame structure through the welded support beam, transverse rods, and longitudinal rods, the welded combination of the transverse and longitudinal rods transforms single-point stress into overall load-bearing capacity. Therefore, it effectively disperses the vertical pressure generated during grab bucket assembly, improves the jig's resistance to deformation and overall stability when bearing the weight of the grab bucket, provides a stable installation foundation for vertical support, and ensures that the bottom support does not undergo significant deformation during grab bucket assembly.

[0009] As a further improvement to the above solution, the upper surfaces of both ends of the support beam are fixedly connected to the bottom of the two vertical supports by welding. A frame for enhancing the overall structural stability is fixed above the longitudinal rod. The frame includes two vertical rods, which are respectively positioned above the two horizontal rods. The bottom of the two vertical rods is welded and fixed to the horizontal rod of the bottom support, and the top of the two vertical rods is fixedly connected by a horizontally arranged connecting rod.

[0010] As a further improvement to the above solution, the frame also includes a vertical pole, which is vertically arranged between two vertical poles. The upper end of the vertical pole is welded and fixed to the middle position of the connecting pole, and the lower end of the vertical pole is welded and fixed to the middle position of the horizontal pole.

[0011] As a further improvement to the above solution, the vertical support includes a support base and a replacement base. The support base is a vertically extending columnar structure, and its lower end is fixedly connected to the support beam of the bottom bracket by welding. The replacement base is located above the support base and is fixedly connected to the support base in a detachable manner. Thus, it is possible to adapt to the center beam shaft of different diameters without replacing the entire vertical support, reducing equipment replacement costs, improving the versatility of the jig for different types of grabs, and facilitating individual replacement when the replacement base is worn or damaged, thereby extending the service life of the support base.

[0012] As a further improvement to the above solution, a flange plate A is horizontally fixed to the upper end face of the support base, and the flange plate A is fixed to the support base by welding. A flange plate B is horizontally fixed to the lower end face of the replacement base, and the flange plate B is fixed to the replacement base by welding. The flange plate A and the flange plate B are the same size and both have multiple connection holes. The flange plate A and the flange plate B can be fixedly connected by bolts passing through the connection holes. The arc groove is provided on the upper end face of the replacement base.

[0013] As a further improvement to the above solution, the bolt passes through the connecting hole on flange plate B and the connecting hole on flange plate A from top to bottom, and is then tightened and fixed with a nut. A spring washer is also provided between the head of the bolt and the upper surface of flange plate B, and the spring washer is sleeved on the bolt.

[0014] As a further improvement to the above solution, the bolt passes through the connecting hole on flange plate B and the connecting hole on flange plate A from top to bottom, and is then tightened and fixed by two nuts. The two nuts are screwed onto the rod body below flange plate A in sequence, and the two nuts abut against each other.

[0015] As can be seen from the above technical solutions, this utility model has at least the following technical effects or advantages: 1. When this device is in use, the bottom of the grab bucket's central beam shaft is supported by the arc grooves at the upper ends of the two vertical supports, keeping the grab bucket in a stable erected state. Operators can perform assembly operations on the outside of the bottom of the central beam. Since the two vertical supports form a stable support through the bottom bracket and are set in parallel, the arc grooves at their upper ends can fit against the bottom of the central beam shaft to limit the grab bucket's sway and effectively prevent the grab bucket from tipping over. Therefore, operators do not need to enter the narrow space at the bottom of the central beam, which avoids the direct risk of components or tools falling from a height and allows welding, bolt installation, and other operations to be carried out in an open space, reducing the difficulty of operation. At the same time, it facilitates the diffusion of welding fumes and reduces the harm to personnel's health.

[0016] 2. Because the bottom support is formed by welding support beams, transverse bars and longitudinal bars to form a closed rectangular frame structure, and the support beams are made of I-beams to enhance bending resistance, and the welding combination of transverse bars and longitudinal bars can transform single-point stress into overall load-bearing capacity, it can effectively disperse the vertical pressure generated during grab bucket assembly, improve the jig's resistance to deformation and overall stability when bearing the weight of the grab bucket, provide a stable installation foundation for vertical support, and ensure that the bottom support does not undergo significant deformation during grab bucket assembly.

[0017] 3. Since the vertical support consists of a support base and a detachable replacement base, the support base is fixedly connected to the bottom bracket. The replacement base can be flexibly replaced according to the model of the grab bucket's center beam shaft. Therefore, it is not necessary to replace the entire vertical support to adapt to center beam shafts of different diameters, which reduces equipment replacement costs, improves the universality of the jig for different models of grab buckets, and facilitates individual replacement when the replacement base is worn or damaged, thus extending the service life of the support base. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0019] Explanation of reference numerals in the attached drawings: 1. Bottom bracket; 101. Support beam; 102. Horizontal bar; 103. Longitudinal bar; 2. Vertical support; 201. Support seat; 202. Replacement seat; 3. Frame; 301. Vertical bar; 302. Connecting bar; 303. Upright; 4. Flange plate A; 5. Flange plate B; 6. Bolt; 7. Nut; 8. Spring washer; 9. Arc groove. Detailed Implementation To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this patent.

[0020] Please see Figure 1 , Figure 2This embodiment discloses a special anti-tipping jig for grab bucket assembly, which includes a bottom bracket 1, a vertical support 2, and a frame 3. The bottom bracket 1 serves as the load-bearing foundation of the entire jig, and is placed horizontally on the ground. It forms a stable frame structure through the welding and assembly of multiple rods. The vertical support 2 is vertically fixed above the bottom bracket 1 to support the central beam shaft of the grab bucket. The frame 3 is located on one side of the bottom bracket 1.

[0021] The bottom support 1 includes a horizontally arranged support beam 101 made of I-beams. Due to the high bending strength of I-beams, they can effectively distribute the vertical pressure generated during grab bucket assembly. Two transverse rods 102 are vertically welded to both ends of the support beam 101, extending outwards along the vertical direction of the support beam 101 to form symmetrically distributed load-bearing arms. To improve the overall integrity of the bottom support 1, a longitudinal rod 103 is welded and fixed between the ends of the two transverse rods 102 furthest from the support beam 101. The longitudinal rod 103 is parallel to the support beam 101, allowing the bottom support 1 to form a closed rectangular frame. This structure, through the mutual restraint of multiple rods, transforms single-point stress into overall load-bearing capacity, improving the fixture's resistance to deformation when bearing the weight of the grab bucket.

[0022] In this embodiment, two vertical supports 2 are spaced apart along the length of the support beam 101, and their lower ends are fixedly connected to the upper surface of the support beam 101 by welding. The upper surface of each vertical support 2 is machined with an arc groove 9, the curvature of which matches the curvature of the outer circumference of the grab bucket's central beam shaft. When the grab bucket is assembled, the bottom of the central beam shaft can fit against the inner surface of the arc groove 9, thereby achieving a positioning effect through the contact of the arc surfaces: on the one hand, in the radial direction, the sidewall of the arc groove 9 can restrict the lateral sliding of the central beam shaft; on the other hand, in the axial direction, the spacing of the two vertical supports 2 forms an axial limit, preventing the central beam shaft from moving along its axial direction.

[0023] To further enhance the overall stability of the grab and prevent the grab bucket from tipping over, a frame 3 is fixed above the side of the bottom support 1 away from the support beam 101. The frame 3 includes two vertical rods 301, a connecting rod 302, and a vertical pole 303, forming a three-dimensional lateral support structure. Two vertical rods 301 are provided, vertically welded to the upper surface of the horizontal rod 102, and their top ends are fixedly connected by a horizontally positioned connecting rod 302, forming the main body of the portal frame. The vertical pole 303 is vertically positioned in the middle of the portal frame, with its upper end welded to the connecting rod 302 and its lower end welded to the horizontal rod 102, creating a more stable structure.

[0024] Considering the differences in the diameter of the center beam shaft of different grab bucket models, in this embodiment, the vertical support 2 is a detachable assembly structure. Specifically, the vertical support 2 includes two parts: a support base 201 and a replacement base 202. The support base 201 is a columnar structure, with its lower end welded to the support beam 101, and a flange plate A4 fixed to its upper end with bolts. The lower end of the replacement base 202 is welded to a flange plate B5, and its upper end is machined with an arc groove 9 adapted to the specific model of the center beam shaft. The flange plate A4 and the flange plate B5 are the same size and both have multiple evenly distributed bolt holes. By passing bolts 6 through the bolt holes and tightening them with nuts 7, a stable connection between the replacement base 202 and the support base 201 can be achieved. The advantage of this detachable structure is that when different models of grab buckets need to be assembled, it is not necessary to replace the entire vertical support 2; only the bolts 6 need to be removed and the replacement base 202 with the corresponding arc groove 9 needs to be replaced, reducing equipment replacement costs and improving the versatility of the fixture.

[0025] To ensure the stability of the connection between the replacement seat 202 and the support seat 201, in this embodiment, the replacement seat 202 and the support seat 201 can be connected in two ways. The first method involves placing a spring washer 8 between the head of the bolt 6 and the flange plate B5. The spring washer 8 undergoes elastic deformation when the bolt 6 is tightened, and its rebound force keeps the threads of the bolt 6 in a pre-tightened state, effectively preventing the bolt 6 from loosening under vibration. The second method uses double nuts 7 for fixing. Two nuts 7 are tightened sequentially at the lower end of the bolt 6. The friction and locking force between the two nuts 7 create a double anti-loosening effect, suitable for operation scenarios with high vibration intensity. Both fixing methods can be flexibly selected according to the actual assembly environment, ensuring that the flange connection does not loosen during long-term use, and guaranteeing the safety and precision stability of the grab bucket assembly.

[0026] In actual assembly operations, the procedure is as follows: First, select a suitable replacement seat 202 according to the model of the grab bucket to be assembled, and fix it to the support seat 201 by bolting flange plate A4 and flange plate B5, and use spring washers 8 or double nuts 7 for anti-loosening treatment; then, use an overhead crane to lift the grab bucket body to the side, adjust the grab bucket posture so that the bottom of the middle beam shaft is aligned with the arc groove 9 of the replacement seat 202, and slowly lower the grab bucket until the middle beam shaft is completely in the arc groove 9. At this time, the side of the grab bucket body is in contact with the inner side wall of the frame 3, forming stable support and limiting; finally, the operator stands on the side or in front of the bottom support 1, and completes the welding of the middle beam and the bucket body, the installation of the anti-rotation plate, and the bolt tightening in an open operating space. Throughout the process, the operator does not need to enter the narrow space at the bottom of the middle beam, which avoids the risk of falling from a height and improves the diffusion conditions of welding fumes. At the same time, the precise positioning function of the jig effectively ensures the connection accuracy of the middle beam and the bucket body.

[0027] In the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this utility model and do not require that this utility model be constructed or operated in a specific orientation, and therefore should not be construed as limiting this utility model. The terms "connected" and "linked" in this utility model should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in its embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A special anti-tipping device for grab bucket assembly, characterized in that, Includes a bottom support (1), on which two vertical supports (2) are fixed. The two vertical supports (2) are spaced apart and parallel along the length of the bottom support (1), and are both perpendicular to the plane where the bottom support (1) is located. The lower end of the vertical support (2) is fixedly connected to the bottom support (1) by welding. The upper end of the vertical support (2) is provided with an arc groove (9). The arc of the arc groove (9) is adapted to the arc of the outer circumference of the beam shaft in the grab bucket.

2. The special anti-tipping fixture for grab bucket assembly according to claim 1, characterized in that, The bottom support (1) includes a horizontally arranged support beam (101). Two horizontal rods (102) are vertically welded to both ends of the support beam (101). The length direction of the two horizontal rods (102) is perpendicular to the length direction of the support beam (101). A longitudinal rod (103) is welded between the two horizontal rods (102). The two ends of the longitudinal rod (103) are welded to the ends of the two horizontal rods (102) away from the support beam (101), and the longitudinal rod (103) is arranged parallel to the support beam (101).

3. The special anti-tipping fixture for grab bucket assembly according to claim 2, characterized in that, The upper surfaces of both ends of the support beam (101) are fixedly connected to the bottom of the two vertical supports (2) by welding. A frame (3) is fixed above the longitudinal rod (103). The frame (3) includes two vertical rods (301). The two vertical rods (301) are respectively set above the two horizontal rods (102). The bottom of the two vertical rods (301) is welded and fixed to the horizontal rod (102) of the bottom bracket (1). The top of the two vertical rods (301) is fixedly connected by a horizontally set connecting rod (302).

4. The special anti-tipping fixture for grab bucket assembly according to claim 3, characterized in that, The frame (3) also includes a vertical pole (303), which is vertically arranged between two vertical poles (301). The upper end of the vertical pole (303) is welded and fixed to the middle position of the connecting pole (302), and the lower end of the vertical pole (303) is welded and fixed to the middle position of the horizontal pole (102).

5. The special anti-tipping fixture for grab bucket assembly according to any one of claims 1 to 4, characterized in that, The vertical support (2) includes a support base (201) and a replacement base (202). The support base (201) is a vertically extending columnar structure, and its lower end is fixedly connected to the support beam (101) of the bottom bracket (1) by welding. The replacement base (202) is located above the support base (201) and is fixedly connected to the support base (201) in a detachable manner.

6. The special anti-tipping fixture for grab bucket assembly according to claim 5, characterized in that, The upper end face of the support base (201) is horizontally fixed with a flange plate A (4), and the flange plate A (4) is fixed to the support base (201) by welding. The lower end face of the replacement base (202) is horizontally fixed with a flange plate B (5), and the flange plate B (5) is fixed to the replacement base (202) by welding. The flange plate A (4) and the flange plate B (5) are the same size and both have multiple connection holes. The flange plate A (4) and the flange plate B (5) can be fixedly connected by bolts (6) passing through the connection holes. The arc groove (9) is set on the upper end face of the replacement base (202).

7. The special anti-tipping fixture for grab bucket assembly according to claim 6, characterized in that, The bolt (6) passes through the connecting hole on the flange plate B (5) and the connecting hole on the flange plate A (4) from top to bottom, and is then tightened and fixed with the nut (7). A spring washer (8) is also provided between the head of the bolt (6) and the upper surface of the flange plate B (5), and the spring washer (8) is sleeved on the bolt (6).

8. The special anti-tipping fixture for grab bucket assembly according to claim 6, characterized in that, The bolt (6) passes through the connecting hole on flange plate B (5) and the connecting hole on flange plate A (4) from top to bottom, and is then tightened and fixed by two nuts (7). The two nuts (7) are screwed onto the rod body below flange plate A (4) in sequence, and the two nuts (7) abut against each other.

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