A hydraulic excavator bucket arm flip welding fixture

Abstract

The present invention discloses a hydraulic excavator boom flip welding fixture, which belongs to the field of excavator boom welding, and solves the problem that the weld cannot be observed and the welding quality is low due to the traditional horizontal clamping. The fixture includes two support seats, a rotating device is provided between the two support seats, and positioning seats are provided on both sides of the rotating device. The two ends of the positioning seat are provided with three first positioning components of three cylinders for positioning the boom, and the middle of the positioning seat is provided with a second positioning component for positioning a U-shaped plate of the boom, and the positioning seat on one side of the second positioning component is provided with a third positioning component for positioning the cover plate of the boom. The hydraulic excavator boom flip welding fixture of the present invention adopts a flip clamping method, which is convenient for observing the matching relationship between the various components and effectively ensures the welding quality of the product.

Description

Technical Field

[0001] The invention relates to the field of excavator bucket rod welding dies, and more specifically, to a hydraulic excavator bucket rod flip welding fixture. Background Art

[0002] In the process of manufacturing the excavator boom, the boom is welded by a horizontal welding process. Specifically, the U-shaped plate and the cover plate of the boom are positioned using step blocks. In this horizontal clamping method, the gap between the U-shaped plate and the cover plate facing the bottom surface of the fixture cannot be observed, which can easily cause welding errors. In addition, since the boom is in a horizontal state, the weld on the side of the boom facing the bottom surface of the fixture is difficult to weld, and spot welding is required after the boom is demolded. However, since the boom has no positioning constraints after demolding, dimensional deviations are easily caused during the secondary spot welding, which leads to product quality problems. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a hydraulic excavator bucket arm flip welding fixture in view of the above-mentioned deficiencies in the prior art. The flip clamping method is adopted to facilitate observation of the matching relationship between various components and effectively ensure the welding quality of the product.

[0004] The technical solution of the present invention is as follows: a hydraulic excavator boom flip-type welding fixture comprises two support seats, a rotating device is provided between the two support seats, positioning seats are provided on both sides of the rotating device, three first positioning components with three cylinders for positioning the boom are provided at both ends of the positioning seat, a second positioning component with a U-shaped plate for positioning the boom is provided in the middle of the positioning seat, and a third positioning component for positioning the cover plate of the boom is provided on the positioning seat on one side of the second positioning component.

[0005] As a further improvement, the rotating device includes a rotating shaft, a turntable, a connecting plate and a support assembly, the rotating shaft is connected to the support seat through a bearing, the turntable is installed at one end of the rotating shaft, the connecting plate is installed at the other end of the rotating shaft, and the support assembly is installed between the two connecting plates.

[0006] Furthermore, the support assembly includes a bottom beam and a bottom plate, the bottom beam is connected to the connecting plate, the bottom plate is installed on the top of the bottom beam, and the positioning seats are installed on both sides of the bottom plate.

[0007] Furthermore, a plurality of evenly arranged pin holes are provided on the rotating shaft, a limiting seat is provided on one side of the supporting seat, and a limiting hole corresponding to the position of the pin holes is provided on the limiting seat.

[0008] Furthermore, the first positioning assembly includes a first tapered shaft and a quick clamp, the first tapered shaft is movably plugged into two positioning seats, the quick clamp is installed on the outside of the positioning seat, and the telescopic end of the quick clamp is connected to one end of the first tapered shaft.

[0009] Furthermore, the second positioning assembly includes a support block, a flat-head shaft and a quick clamp, the support blocks are installed in pairs on the rotating device, the flat-head shaft is movably inserted into two positioning seats, the quick clamp is installed on the outside of the positioning seat, and the telescopic end of the quick clamp is connected to one end of the flat-head shaft.

[0010] Furthermore, the third positioning assembly includes a stepped shaft, a positioning block and a quick clamp, the stepped shaft is movably plugged into one of the positioning seats, the quick clamp is installed on the outside of the positioning seat, and the telescopic end of the quick clamp is connected to one end of the stepped shaft, and the positioning block is fixed on another positioning seat corresponding to the stepped shaft.

[0011] Furthermore, a fourth positioning assembly for positioning the ear plate of the boom is provided on the positioning seat on the other side of the second positioning assembly, and the fourth positioning assembly includes a second tapered shaft and a quick clamp, the second tapered shaft is movably plugged into the two positioning seats, the quick clamp is installed on the outside of the positioning seat, and the telescopic end of the quick clamp is connected to one end of the second tapered shaft.

[0012] Furthermore, a movable limiting column is provided between two of the second tapered shafts corresponding to the two positioning seats, and a limiting block connected to the rotating device is provided between the other two second tapered shafts corresponding to the two positioning seats.

[0013] Beneficial Effects

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The hydraulic excavator boom flip welding fixture of the present invention utilizes the first positioning assembly to position the three cylinders of the boom, the second positioning assembly to position the U-shaped plate of the boom, and the third positioning assembly to position the cover plate of the boom, so that the boom is in a vertical state during welding, and cooperates with the rotating device to drive each positioning assembly and the boom to flip, which is convenient for observing the matching relationship between the various components, and helps workers to weld the welds between the various components, thereby effectively ensuring the welding quality of the product and improving the product quality.

[0016] 2. The hydraulic excavator boom flip welding fixture of the present invention also integrates the welding clamping of the boom ear plate. The ear plate is quickly positioned on the cover plate through the fourth positioning assembly composed of the second tapered shaft and the quick clamp. All parts of the boom can be welded on one fixture without multiple clamping, which further ensures the welding quality of the boom, while improving work efficiency and reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a bucket arm in the prior art;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0020] Figure 4 It is a schematic diagram of a partial three-dimensional structure of one side of the support base in the present invention;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure when the present invention is applied.

[0022] Among them: 1-support seat, 2-positioning seat, 3-rotating axis, 4-turntable, 5-connecting plate, 6-bottom beam, 7-bottom plate, 8-pin hole, 9-limiting seat, 10-limiting hole, 11-first tapered shaft, 12-quick clamp, 13-support block, 14-flat head shaft, 15-step shaft, 16-positioning block, 17-second tapered shaft, 18-limiting column, 19-limiting block, 20-fixed plate, a-cylinder, bU-type plate, c-cover plate, d-ear plate. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0024] See also Figure 1-5 A hydraulic excavator boom flip welding fixture of the present invention comprises two support seats 1, which are symmetrically arranged. A rotating device is provided between the two support seats 1 for supporting and rotating the boom. Positioning seats 2 are provided on both sides of the rotating device. The positioning seats 2 are symmetrically arranged. The gap formed between the two positioning seats 2 constitutes a placement groove for placing the boom. The corresponding parts of the boom and the welded boom can freely enter and exit the placement groove. Three first positioning components of three cylinders a for positioning the boom are provided at both ends of the positioning seat 2. Specifically, one end of the positioning seat 2 has two first positioning components, and the other end has one first positioning component. A second positioning component of a U-shaped plate b for positioning the boom is provided in the middle of the positioning seat 2, and a third positioning component of a cover plate c for positioning the boom is provided on the positioning seat 2 on one side of the second positioning component.

[0025] Specifically, the rotating device includes a rotating shaft 3, a rotating disk 4, a connecting plate 5 and a supporting assembly, wherein the rotating shaft 3, the rotating disk 4 and the connecting plate 5 are arranged in pairs, the rotating shaft 3 is connected to the supporting seat 1 through a bearing, so that the rotating shaft 3 can rotate relative to the supporting seat 1, the rotating disk 4 is installed at one end of the rotating shaft 3, the connecting plate 5 is installed at the other end of the rotating shaft 3, the connecting plate 5 is a triangular plate, the top of which is connected to the rotating shaft 3, and the supporting assembly is installed between the bottom ends of the two connecting plates 5. The supporting assembly includes a bottom beam 6 and a bottom plate 7, wherein the bottom beam 6 is arranged in pairs, and the bottom beam 6 is connected to the connecting plate 5, the bottom plate 7 is installed on the top of the bottom beam 6, and the positioning seat 2 is installed on both sides of the bottom plate 7. The rotating disk 4 is rotated to drive the connecting plate 5 to rotate through the rotating shaft 3, thereby driving the supporting assembly to rotate, and then driving the bucket arm to rotate, so as to achieve the purpose of flipping the bucket arm. Preferably, the base plate 7 is composed of two flat plates, which are fastened to the bottom beam 6 by bolts, which can effectively reduce its weight. At the same time, the positioning seat 2 is composed of four L-shaped plates, which are fastened to the two flat plates by bolts respectively. The split positioning seat 2 composition structure not only reduces its weight, but also forms a gap between two adjacent L-shaped plates, which is convenient for workers to operate.

[0026] Furthermore, a plurality of evenly arranged pin holes 8 are provided on the rotating shaft 3, and the pin holes 8 penetrate the rotating shaft 3. A limit seat 9 is provided on one side of the support seat 1. The limit seat 9 is fixed on the support seat 1 directly below the rotating shaft 3, and a limit hole 10 corresponding to the position of the pin hole 8 is provided on the limit seat 9. When the turntable 4 rotates a certain angle, the turntable 4 can be locked by inserting a pin into the pin hole 8 and the limit hole 10, and then the boom can be locked at a specified angle.

[0027] Specifically, the first positioning component includes a first tapered shaft 11 and a quick clamp 12, wherein there are a total of 6 first tapered shafts 11 and quick clamps 12, which are symmetrically distributed on two positioning seats 2, wherein the first tapered shaft 11 is movably plugged into the two positioning seats 2, the quick clamp 12 is installed on the outside of the positioning seat 2, and the telescopic end of the quick clamp 12 is connected to one end of the first tapered shaft 11, and the first tapered shaft 11 is driven by the quick clamp 12 to move and inserted into the cylinder a of the boom, thereby achieving the purpose of positioning the cylinder a. Compared with the traditional pull-out shaft positioning, the positioning and clamping of the tapered shaft can ensure the symmetry of the parts and the verticality of the empty space.

[0028] Specifically, the second positioning assembly includes a support block 13, a flat-head shaft 14 and a quick clamp 12, wherein there are two flat-head shafts 14 and quick clamps 12 in total, the support blocks 13 are installed in pairs on the rotating device, each support block 13 is fastened to both ends of the bottom plate 7 of the rotating device by bolts, and plays the role of supporting the U-shaped plate b, the flat-head shaft 14 is movably inserted into the two positioning seats 2, the quick clamp 12 is installed on the outside of the positioning seat 2, and the telescopic end of the quick clamp 12 is connected to one end of the flat-head shaft 14. When the U-shaped plate b is placed on the two support blocks 13, the flat-head shaft 14 is driven to move by the quick clamp 12 to clamp the U-shaped plate b.

[0029] Specifically, the third positioning assembly includes a stepped shaft 15, a positioning block 16 and a quick clamp 12, wherein the stepped shaft 15 is movably inserted into one of the positioning seats 2, the quick clamp 12 is installed on the outer side of the positioning seat 2, and the telescopic end of the quick clamp 12 is connected to one end of the stepped shaft 15, the upper part of the positioning block 16 has a shoulder, and the positioning block 16 is fixed on another positioning seat 2 corresponding to the stepped shaft 15, that is, the positions of the stepped shaft 15 and the positioning block 16 correspond. When the cover plate c is placed on the U-shaped plate b, the stepped shaft 15 is driven to move by the quick clamp 12, so that the end face of the stepped shaft 15 and the lower part of the positioning block 16 are in contact with the side of the U-shaped plate b, and the shoulder of the stepped shaft 15 and the upper part of the positioning block 16 are in contact with the side of the cover plate c, thereby clamping the cover plate c.

[0030] Specifically, a fourth positioning assembly for positioning the ear plate d of the boom is also provided on the positioning seat 2 on the other side of the second positioning assembly, and the fourth positioning assembly includes a second tapered shaft 17 and a quick clamp 12, wherein there are a total of four second tapered shafts 17 and quick clamps 12, which are symmetrically distributed on the two positioning seats 2, the second tapered shaft 17 is movably plugged into the two positioning seats 2, the quick clamp 12 is installed on the outside of the positioning seat 2, and the telescopic end of the quick clamp 12 is connected to one end of the second tapered shaft 17, and the second tapered shaft 17 is driven by the quick clamp 12 to move and inserted into the ear hole of the boom ear plate d to achieve the purpose of positioning the ear plate d. Compared with the traditional pull-out shaft positioning, the positioning and clamping of the tapered shaft can ensure the symmetry of the parts and the verticality of the space.

[0031] Preferably, a movable limiting column 18 is provided between two of the second conical shafts 17 corresponding to the two positioning seats 2, and a limiting block 19 connected to the rotating device is provided between the other two second conical shafts 17 corresponding to the two positioning seats 2. When placing the ear plate d, the two side plates at one end of the ear plate d are inserted into the limiting block 19 to guide the ear plate d, and then the limiting column 18 is placed between the two side plates at the other end of the ear plate d, and then the second conical shaft 17 is inserted to prevent the ear plate d from deformation.

[0032] The quick clamp 12 in this embodiment is a push-pull clamp, which is an existing product. The quick clamp 12 is connected to the positioning seat 2 through the fixing plate 20. The clamping and loosening operations are performed through the quick clamp 12, which improves work efficiency and reduces labor intensity. In addition, the corresponding parts of the clamp in this embodiment are connected by bolts, which is helpful for subsequent disassembly and maintenance.

[0033] When the hydraulic excavator boom flip welding fixture of this embodiment is used, the U-shaped plate b is first placed in the placement groove formed by the two positioning seats 2, supported by the support block 13, and clamped by the flat head shaft 14, and then the three cylinders a of the boom are respectively placed in the installation positions corresponding to the U-shaped plate b, and they are clamped by the first tapered shaft 11. At this time, the weld between the cylinder a and the inner side of the U-shaped plate b can be welded; then the cover plate c is placed on the top of the U-shaped plate b, and it is clamped by the step shaft 15 and the positioning block 16. At this time, the cover plate c and the U Then loosen the flat head shaft 14 and the first tapered shaft 11 adjacent to it, and then insert the ear plate d into both sides of the U-shaped plate b along the limit block 19, and then insert the limit column 18 between the two side plates of the ear plate d, then reset the flat head shaft 14 and the first tapered shaft 11 adjacent to it, clamp the lower part of the ear plate d, and then use the second tapered shaft 17 to clamp the upper part of the ear plate d. At this time, the weld between the ear plate d and the U-shaped plate b and the cover plate c can be welded; finally, loosen all the quick clamps 12, and the boom can be lifted out of the fixture. During this period, the boom can be driven to rotate a certain angle by rotating the turntable 4, and the rotating shaft 3 is connected to the limit seat 9 by a pin, and the boom is locked at a specified angle, so that the welds of each part can be observed and welded.

[0034] The hydraulic excavator boom flip welding fixture of the present invention utilizes a first positioning component to position the three cylinders of the boom, a second positioning component to position the U-shaped plate of the boom, and a third positioning component to position the cover plate of the boom, so that the boom is in a vertical state during welding, and cooperates with a rotating device to drive each positioning component and the boom to flip, which is convenient for observing the matching relationship between the various components, and helps workers to weld the welds between the various components, thereby effectively ensuring the welding quality of the product and improving the product quality; at the same time, the fixture also integrates the welding clamping of the ear plate of the boom, and the ear plate is quickly positioned on the cover plate through the fourth positioning component composed of a second tapered shaft and a quick clamp, so that all components of the boom can be welded on one fixture without multiple clamping, which further ensures the welding quality of the boom, while improving work efficiency and reducing labor intensity.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A hydraulic excavator bucket arm flip welding fixture, characterized in that: The invention comprises two support seats (1), a rotating device is provided between the two support seats (1), positioning seats (2) are provided on both sides of the rotating device, three first positioning components of three cylinders (a) for positioning a boom are provided at both ends of the positioning seat (2), a second positioning component of a U-shaped plate (b) for positioning the boom is provided in the middle of the positioning seat (2), a third positioning component of a cover plate (c) for positioning the boom is provided on the positioning seat (2) on one side of the second positioning component, the third positioning component comprises a stepped shaft (15), a positioning block (16) and a quick clamp (12), the The stepped shaft (15) is movably plugged into one of the positioning seats (2), the quick clamp (12) is mounted on the outside of the positioning seat (2), and the telescopic end of the quick clamp (12) is connected to one end of the stepped shaft (15), the positioning block (16) is fixed to another positioning seat (2) corresponding to the stepped shaft (15), and the positioning seat (2) on the other side of the second positioning assembly is also provided with a fourth positioning assembly for locating an ear plate (d) of the bucket rod, the fourth positioning assembly comprises a second tapered shaft (17) and the quick clamp (12), the second tapered shaft (17) is movably plugged into On the two positioning seats (2), the quick clamp (12) is installed on the outside of the positioning seats (2), and the telescopic end of the quick clamp (12) is connected to one end of the second tapered shaft (17); the first positioning assembly includes a first tapered shaft (11) and a quick clamp (12), the first tapered shaft (11) is movably plugged into the two positioning seats (2), the quick clamp (12) is installed on the outside of the positioning seats (2), and the telescopic end of the quick clamp (12) is connected to one end of the first tapered shaft (11); the second positioning assembly includes a support block (13), a flat head shaft (14) and a quick clamp (12), the support blocks (13) are mounted in pairs on the rotating device, the flat-head shaft (14) is movably plugged into the two positioning seats (2), the quick clamp (12) is mounted on the outside of the positioning seat (2), and the telescopic end of the quick clamp (12) is connected to one end of the flat-head shaft (14), a movable limiting column (18) is provided between two of the second tapered shafts (17) corresponding to the two positioning seats (2), and a limiting block (19) connected to the rotating device is provided between the other two second tapered shafts (17) corresponding to the two positioning seats (2).

2. A hydraulic excavator boom flip welding fixture according to claim 1, characterized in that: The rotating device comprises a rotating shaft (3), a rotating disk (4), a connecting plate (5) and a supporting assembly, wherein the rotating shaft (3) is connected to the supporting seat (1) via a bearing, the rotating disk (4) is mounted on one end of the rotating shaft (3), the connecting plate (5) is mounted on the other end of the rotating shaft (3), and the supporting assembly is mounted between the two connecting plates (5).

3. A hydraulic excavator boom tilting welding fixture according to claim 2, characterized in that: The support assembly comprises a bottom beam (6) and a bottom plate (7), the bottom beam (6) is connected to the connecting plate (5), the bottom plate (7) is mounted on the top of the bottom beam (6), and the positioning seat (2) is mounted on both sides of the bottom plate (7).

4. The hydraulic excavator boom tilting welding fixture according to claim 2, characterized in that: The rotating shaft (3) is provided with a plurality of evenly arranged pin holes (8), one side of the support seat (1) is provided with a limit seat (9), and the limit seat (9) is provided with a limit hole (10) corresponding to the position of the pin hole (8).

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