Tool clamp for automatic welding of special-shaped bucket

Abstract

The utility model discloses a tool clamp for automatic welding of a special-shaped excavator bucket. The tool clamp comprises a supporting base, a front locking part and a rear locking part, wherein the front locking part and the rear locking part are installed on the supporting base. A rear positioning supporting groove with a backward opening is fixedly formed in the rear portion of the supporting base. The front locking part comprises a front hook locking driving mechanism and a front hook locking shaft, the front hook locking driving mechanism comprises a front locking component and a front locking component driving structure, the front locking component is in positioning fit with the front hook locking shaft, the front locking component driving structure is in transmission connection with the front locking component, and the driving direction of the front locking component driving structure is arranged in the front-back direction; the rear locking part comprises a rear groove locking shaft, a positioning groove locking shaft, a rear positioning shaft and a positioning supporting vertical plate. The rear groove locking shaft, the positioning groove locking shaft and the rear positioning shaft penetrate through the positioning supporting vertical plate. The clamping and positioning device can stably clamp and position the special-shaped excavator bucket with the quick-change hook plate mechanism, and is particularly suitable for the automatic welding process of the special-shaped excavator bucket with the quick-change hook plate mechanism.

Description

Technical Field

[0001] The utility model relates to a tooling fixture, in particular to a tooling fixture used when an automatic welding robot is used to automatically weld a special-shaped bucket of an excavator, and belongs to the technical field of excavator bucket processing equipment. Background Art

[0002] An excavator is an earth-moving machine that uses a bucket to dig materials above or below the surface of the machine and load them into a transport vehicle or unload them to a stockpile. It is one of the most important construction machinery in engineering construction. As the working device of the excavator, the bucket belongs to the structural component category. Welding is the most critical manufacturing process for the bucket. The welding quality directly affects the structural strength and service life of the bucket. Therefore, the current welding process of the bucket usually uses an automatic welding robot to ensure the welding quality.

[0003] When an automatic welding robot is used to weld a bucket, the assembled bucket assembly needs to be fixed on a flip table through a fixture. The flipping action of the flip table is controlled to change the position of the bucket assembly, so that the automatic welding robot can complete the welding of all welds by clamping the bucket once. Existing bucket welding fixtures are usually designed for conventional buckets with bucket hinged ear plates. The bucket hinged ear plates, which are symmetrically arranged on the left and right, are provided with hinged mounting holes for installing the dipper arm and connecting rod of the excavator. The bucket welding fixture can position the bucket simply by positioning the hinged mounting holes. However, if Figure 1 The special-shaped bucket shown in the figure has a quick-change hook plate mechanism symmetrically arranged on the cross beam at the top of the bucket body. The quick-change hook plate mechanism includes a front hook structure 4 extending forward of the cross beam, a rear hook groove structure 5 extending rearward of the cross beam, and a positioning groove 6 located between the front hook structure 4 and the rear hook groove structure 5. The front hook structure 4 is a hook-shaped structure bent rearward and downward, the rear hook groove structure 5 has a groove extending forward, and the positioning groove 6 is a groove structure recessed toward the plate body of the quick-change hook plate. Since the quick-change hook plate mechanism is not provided with an articulated mounting hole for installing the dipper arm and connecting rod of the excavator, the existing bucket welding tooling fixture cannot clamp and position such special-shaped buckets. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a tooling fixture for automatic welding of special-shaped buckets, which can achieve stable clamping and positioning of special-shaped buckets with quick-change hook plate mechanisms, and is particularly suitable for the automatic welding process of special-shaped buckets with quick-change hook plate mechanisms.

[0005] In order to achieve the above-mentioned purpose, the tooling fixture for automatic welding of the special-shaped bucket comprises a support base and a front locking part and a rear locking part installed on the support base;

[0006] A rear positioning support groove opening toward the rear is fixedly provided at the rear of the support base;

[0007] The front locking part includes a front hook locking driving mechanism and a front hook locking shaft. The front hook locking shaft arranged in the left-right direction in the axial direction includes a hook stop positioning shaft section I matched with the front hook structure. The front hook locking driving mechanism includes a front locking component positioned and matched with the front hook locking shaft and a front locking component driving structure drivingly connected to the front locking component. The front locking component driving structure is positioned and installed on the support base, and the driving direction of the front locking component driving structure is arranged along the front-back direction.

[0008] The rear locking part includes a rear groove locking shaft, a positioning groove locking shaft, a rear positioning shaft and a positioning support vertical plate. The positioning support vertical plate is symmetrically arranged in two pieces. The rear groove locking shaft, the positioning groove locking shaft and the rear positioning shaft which are arranged in the axial direction along the left and right directions and parallel to each other all penetrate the positioning support vertical plate. The rear groove locking shaft corresponds to the rear hook groove structure, the positioning groove locking shaft corresponds to the positioning groove, the rear positioning shaft corresponds to the rear positioning support groove, and the rear positioning shaft includes a hook stop positioning shaft section II which cooperates with the rear positioning support groove.

[0009] As a further improvement of the present invention, both ends of the front hook locking shaft and / or the positioning groove locking shaft are provided with axial locking structures that can be positioned against the side panels of the front hook structure.

[0010] As an implementation mode of the present utility model, the axial locking structure is a one-way locking structure with a static locking structure at one end and a dynamic locking structure at the other end.

[0011] As an embodiment of the present invention, the static locking structure is a positioning boss located at one end of the front hook locking shaft or the positioning groove locking shaft, and the dynamic locking structure is a locking nut structure threadedly matched with the other end of the front hook locking shaft or the positioning groove locking shaft.

[0012] As an implementation mode of the present utility model, the axial locking structure is a bidirectional locking structure with both ends being dynamic locking structures.

[0013] As an implementation mode of the present utility model, the dynamic locking structure is a locking nut structure threadedly matched with both ends of the front hook locking shaft or the positioning groove locking shaft.

[0014] As a further improvement of the present invention, the two positioning support vertical plates are fixedly connected to form an integrated structure via a supporting rib plate.

[0015] As an implementation mode of the present utility model, the front locking component driving structure is a screw transmission structure including a screw and a nut.

[0016] As a further improvement of the present invention, the front locking component driving structure is positioned and installed inside the supporting base.

[0017] As a further improvement of the present invention, the front locking component includes a front positioning support groove opened toward the front.

[0018] Compared with the prior art, when the special-shaped bucket including a quick-change hook plate mechanism is clamped and positioned using the tooling fixture for automatic welding of the special-shaped bucket, the rear locking part is clamped in the rear positioning support groove of the support base as a whole through the rear positioning shaft, and then the bucket assembly that has been assembled and formed is inverted and hoisted, and the positioning groove locking shaft is clamped into the positioning groove of the bucket assembly, and the rear groove locking shaft is clamped into the rear hook groove structure of the bucket assembly. After the front hook locking shaft installed in a positioning and matching manner with the front locking component is clamped on the front hook structure of the bucket assembly, the front locking component driving structure is controlled to move forward a set distance and position it, so that the special-shaped bucket including a quick-change hook plate mechanism can be firmly clamped and positioned through the front locking part and the rear locking part, which is particularly suitable for the automatic welding process of special-shaped buckets with quick-change hook plate mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of a special-shaped bucket with a quick-change hook plate mechanism;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model from the left front perspective;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the utility model from the left rear perspective;

[0022] Figure 4 It is a three-dimensional structural schematic diagram from the left front view when the utility model is clamping a special-shaped bucket with a quick-change hook plate mechanism;

[0023] Figure 5 It is a three-dimensional structural schematic diagram from a left rear perspective when the utility model is clamping a special-shaped bucket with a quick-change hook plate mechanism.

[0024] In the figure: 1. support base, 11. rear positioning support groove, 2. front locking part, 21. front hook locking drive mechanism, 211. front locking component, 212. front locking component driving structure, 22. front hook locking shaft, 3. rear locking part, 31. rear groove locking shaft, 32. positioning groove locking shaft, 33. rear positioning shaft, 34. positioning support vertical plate, 4. front hook structure, 5. rear hook groove structure, 6. positioning groove. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings (hereinafter, the description will be made with the length direction of the supporting beam 1 being the left-right direction).

[0026] like Figure 2, Figure 3 As shown, the fixture for automatic welding of special-shaped buckets comprises a support base 1 and a front locking part 2 and a rear locking part 3 installed on the support base 1 .

[0027] A rear positioning support groove 11 opening toward the rear is fixedly provided at the rear of the support base 1 .

[0028] The front locking part 2 includes a front hook locking drive mechanism 21 and a front hook locking shaft 22. The front hook locking shaft 22, which is arranged in the left-right direction in the axial direction, includes a hook stop positioning shaft section I that cooperates with the front hook structure 4. The front hook locking drive mechanism 21 includes a front locking component 211 that is positioned and matched with the front hook locking shaft 22, and a front locking component driving structure 212 that is transmission-connected to the front locking component 211. To facilitate the rapid disassembly and assembly of the front hook locking shaft 22, the front locking component 211 may include a front positioning support groove that opens to the front. The front locking component driving structure 212 is positioned and installed on the support base 1, and the driving direction of the front locking component driving structure 212 is arranged along the front-to-back direction, so as to effectively utilize the installation space. The front locking component driving structure 212 may be positioned and installed inside the support base 1. The front locking component driving structure 212 may be as follows Figure 2 , Figure 3 The screw transmission structure shown includes a screw and a nut, or may be other linear reciprocating transmission structures such as a telescopic cylinder transmission structure including a telescopic cylinder. By controlling the action of the front locking component driving structure 212, the front locking component 211 can be controlled to drive the front hook locking shaft 22 to move and position along the front and rear directions.

[0029] The rear locking part 3 includes a rear groove locking shaft 31, a positioning groove locking shaft 32, a rear positioning shaft 33 and a positioning support vertical plate 34. The positioning support vertical plate 34 is symmetrically arranged in two pieces. The rear groove locking shaft 31, the positioning groove locking shaft 32 and the rear positioning shaft 33 which are arranged in the axial direction along the left and right directions and are parallel to each other all penetrate the positioning support vertical plate 34. The rear groove locking shaft 31, the positioning groove locking shaft 32 and the rear positioning shaft 33 are connected as an integral structure through the positioning support vertical plate 34. The rear groove locking shaft 31 corresponds to the rear hook groove structure 5, the positioning groove locking shaft 32 corresponds to the positioning groove 6, the rear positioning shaft 33 corresponds to the rear positioning support groove 11, and the rear positioning shaft 33 includes a hook stop positioning shaft section II that cooperates with the rear positioning support groove 11.

[0030] Use this special-shaped bucket automatic welding fixture to Figure 1 When the special-shaped bucket including the quick-change hook plate mechanism shown in the figure is clamped and positioned, Figure 4 , Figure 5As shown, the rear locking part 3 is first clamped in the rear positioning support groove 11 of the support base 1 through the hook stop positioning shaft section II of the rear positioning shaft 33, and then the bucket assembly that has been assembled and formed is inverted and hoisted, and the positioning groove locking shaft 32 is clamped into the positioning groove 6 of the bucket assembly, and the rear groove locking shaft 31 is clamped into the rear hook groove structure 5 of the bucket assembly. After the front hook locking shaft 22 that is positioned and matched with the front locking component 211 is clamped on the front hook structure 4 of the bucket assembly through the hook stop positioning shaft section I, the front locking component driving structure 212 is controlled to move so that the front locking component 211 drives the front hook to lock The shaft 22 moves forward a set distance and is positioned. During the forward movement of the front hook locking shaft 22, the bucket assembly as a whole is subjected to the pulling force of moving forward. Since the rear locking part 3 is clamped in the rear positioning support groove 11 of the support base 1 through the hook stop positioning shaft section II of the rear positioning shaft 33, and the rear groove locking shaft 31, the positioning groove locking shaft 32 and the rear positioning shaft 33 are connected as an integral structure through the positioning support vertical plate 34, the bucket assembly is clamped and positioned by the front locking part 2 and the rear locking part 3. After the clamping and positioning are completed, the support base 1 can be fixedly connected to the table top of the flip workbench.

[0031] In order to further realize the positioning of the bucket assembly in the left and right directions, as a further improvement scheme of the utility model, both ends of the front hook locking shaft 22 and / or the positioning groove locking shaft 32 are provided with axial locking structures that can be positioned against the side panels of the front hook structure 4. The axial locking structure can be a unidirectional locking structure with a static locking structure at one end and a dynamic locking structure at the other end. The axial locking structure can also be a bidirectional locking structure with dynamic locking structures at both ends. When the unidirectional locking structure is adopted, the static locking structure can be a positioning boss located at one end of the front hook locking shaft 22 or the positioning groove locking shaft 32, and the dynamic locking structure can be a locking nut structure threadedly matched with the other end of the front hook locking shaft 22 or the positioning groove locking shaft 32. When the bidirectional locking structure is adopted, the dynamic locking structure can be a locking nut structure threadedly matched with the two ends of the front hook locking shaft 22 or the positioning groove locking shaft 32 respectively.

[0032] In order to further improve the positioning stability of the rear locking part 3, as a further improvement of the present utility model, the two positioning support vertical plates 34 are fixedly connected into an integral structure through a supporting rib plate.

Claims

1. A fixture for automatic welding of special-shaped buckets, characterized in that: It comprises a support base (1) and a front locking part (2) and a rear locking part (3) mounted on the support base (1); A rear positioning support groove (11) with an opening facing rearward is fixedly provided at the rear of the support base (1); The front locking part (2) comprises a front hook locking driving mechanism (21) and a front hook locking shaft (22); the front hook locking shaft (22) is arranged in the left-right direction in the axial direction and comprises a hook stop positioning shaft section I which cooperates with the front hook structure (4); the front hook locking driving mechanism (21) comprises a front locking component (211) which is positioned and matched with the front hook locking shaft (22) and a front locking component driving structure (212) which is transmission-connected to the front locking component (211); the front locking component driving structure (212) is positioned and installed on the support base (1), and the driving direction of the front locking component driving structure (212) is arranged in the front-back direction; The rear locking part (3) comprises a rear groove locking shaft (31), a positioning groove locking shaft (32), a rear positioning shaft (33) and a positioning support vertical plate (34). The positioning support vertical plate (34) is symmetrically arranged in two parts. The rear groove locking shaft (31), the positioning groove locking shaft (32) and the rear positioning shaft (33) are arranged in the left-right direction and parallel to each other in the axial direction and all penetrate the positioning support vertical plate (34). The rear groove locking shaft (31) is arranged corresponding to the rear hook groove structure (5), the positioning groove locking shaft (32) is arranged corresponding to the positioning groove (6), and the rear positioning shaft (33) is arranged corresponding to the rear positioning support groove (11), and the rear positioning shaft (33) includes a hook stop positioning shaft section II that cooperates with the rear positioning support groove (11).

2. The jig for automatic welding of special-shaped buckets according to claim 1, characterized in that: Both ends of the front hook locking shaft (22) and / or the positioning groove locking shaft (32) are provided with axial locking structures that can be positioned against the side panels of the front hook structure (4).

3. The fixture for automatic welding of special-shaped bucket according to claim 2, characterized in that: The axial locking structure is a one-way locking structure with a static locking structure at one end and a dynamic locking structure at the other end.

4. The fixture for automatic welding of special-shaped buckets according to claim 3 is characterized in that: The static locking structure is a positioning boss located at one end of the front hook locking shaft (22) or the positioning groove locking shaft (32), and the dynamic locking structure is a locking nut structure threadedly matched with the other end of the front hook locking shaft (22) or the positioning groove locking shaft (32).

5. The jig for automatic welding of special-shaped buckets according to claim 2, characterized in that: The axial locking structure is a bidirectional locking structure with dynamic locking structures at both ends.

6. The jig for automatic welding of special-shaped buckets according to claim 5, characterized in that: The dynamic locking structure is a locking nut structure threadably matched with the two ends of the front hook locking shaft (22) or the positioning groove locking shaft (32).

7. The fixture for automatic welding of special-shaped buckets according to any one of claims 1 to 6, characterized in that: The two positioning support vertical plates (34) are fixedly connected to form an integrated structure via a supporting rib plate.

8. The fixture for automatic welding of special-shaped buckets according to any one of claims 1 to 6, characterized in that: The front locking component driving structure (212) is a screw transmission structure including a screw and a nut.

9. The fixture for automatic welding of special-shaped buckets according to any one of claims 1 to 6, characterized in that: The front locking component driving structure (212) is positioned and installed inside the supporting base (1).

10. The fixture for automatic welding of special-shaped buckets according to any one of claims 1 to 6, characterized in that: The front locking component (211) comprises a front positioning support groove which opens to the front.

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