Positioning and clamping tool for excavator boom

Abstract

The utility model relates to excavator component machining technical field, concretely relates to excavator movable arm's positioning clamping method, based on positioning clamping frock, positioning clamping frock includes: frame, big end abutting mechanism is connected in frame, is used for abutting and positioning excavator movable arm body's big end arm's end, big end support mechanism is connected in frame, is located big end abutting mechanism's X direction side, includes along the first fixed height support seat and first adjustable height support seat of Y direction distribution, big end precentering mechanism is connected in frame, is located big end support mechanism's X direction side, includes the first centering clamping arm and second centering clamping arm of symmetrical setting, is used for excavator movable arm body's big end arm's side precentering, the above structure combination method can be accurately positioned and clamped to different specifications models excavator movable arm.

Description

Technical Field

[0001] This utility model relates to the field of excavator component processing technology, specifically to a positioning and clamping fixture for an excavator boom. Background Technology

[0002] The excavator boom is a crucial component of an excavator. After the excavator boom frame is manufactured, it needs to be clamped onto a clamping fixture to facilitate the assembly of various components on the excavator boom frame using a large CNC machine tool. Chinese Patent CN117817593A discloses an excavator boom centering clamping fixture and centering clamping method. Its structure can perform multi-directional centering and positioning clamping of a single model of excavator boom. However, it is difficult to apply to the positioning and clamping of excavator booms of different models and specifications. Furthermore, its two end support positions are fixed, while the bottom of the two ends of the excavator boom has flatness errors. If fixed supports are used, the excavator boom is prone to slight tilting during the clamping process, thus affecting the clamping accuracy. Utility Model Content

[0003] The technical problem to be solved by this utility model is to improve the positioning and clamping fixture of the excavator boom, so that it can be applied to the positioning and clamping of excavator booms of different models and specifications, and can further improve the clamping accuracy.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: The positioning and clamping fixture for the excavator boom is based on the excavator boom body, which is L-shaped and includes an L-shaped arm composed of a large end arm and a small end arm. The positioning and clamping fixture includes: frame; The large end support mechanism is connected to the frame and is used to support and position the end of the large end arm of the excavator boom body. The large-end support mechanism is connected to the frame and located on the X-direction side of the large-end top abutment mechanism, including a first fixed-height support seat and a first adjustable-height support seat distributed along the Y-direction; The large-end pre-alignment mechanism is connected to the frame and located on the X-direction side of the large-end support mechanism. It includes a first alignment clamp arm and a second alignment clamp arm that are symmetrically arranged and are used for the side pre-alignment of the large-end arm of the excavator boom body. The first side top mechanism is connected to the frame and located on the X-direction side of the large end pre-centering mechanism. It includes a first side top clamping arm and a second side top clamping arm that are symmetrically arranged and used for positioning and clamping the large end arm of the excavator boom body. The first X-axis guide rail is connected to the frame and is located on the X-axis side of the first side top mechanism; The second top-mounting mechanism is slidably connected to the first X-guide rail via the first slide block. The second side-mounting mechanism includes a third side-mounting clamping arm and a fourth side-mounting clamping arm arranged symmetrically for positioning and clamping the side of the middle section of the excavator boom body; and a first laser rangefinder and a second laser rangefinder arranged symmetrically. The second X-axis guide rail is connected to the frame and is located on the X-axis side of the first X-axis guide rail; The second slide block is slidably connected to the second X-guide rail; The third side top mechanism is connected to the second slide block. The third side top mechanism includes a fifth side top clamping arm and a sixth side top clamping arm that are symmetrically arranged, which are used for positioning and clamping the side of the small end arm of the excavator boom body. The small-end pre-centering mechanism is connected to the second slide and located on the X-direction side of the third side top mechanism. It includes a symmetrically arranged third centering clamping arm and a fourth centering clamping arm, which are used for the side pre-centering of the small-end arm of the excavator boom body. The small end support mechanism is connected to the second slide and is located on the X-direction side of the small end centering mechanism. It includes a second adjustable height support seat and a second fixed height support seat distributed along the Y-direction. The third X-axis guide rail is connected to the second slide and is located on the X-axis side of the small end support mechanism; The third slide block is slidably connected to the third X-axis guide rail; The small-end jacking mechanism is connected to the third slide block and is used to push against the end of the small-end arm of the excavator boom body.

[0005] Furthermore, in the above-mentioned positioning and clamping fixture structure for the excavator boom, the first adjustable height support includes a lifting cylinder and a support body connected to the upper end of the lifting cylinder. The piston rod of the lifting cylinder is provided with a limiting inclined surface on its side, and a side limiting cylinder is provided on the side of the lifting cylinder. The end of the piston rod of the side limiting cylinder is directly opposite the limiting inclined surface.

[0006] Furthermore, in the above-mentioned positioning and clamping fixture structure for the excavator boom, the first side top clamping arm is connected to a first height adjustment mechanism, and the second side top clamping arm is connected to a second height adjustment mechanism.

[0007] Furthermore, in the above-mentioned positioning and clamping fixture structure for the excavator boom, the third side top clamping arm is connected to a third height adjustment mechanism, and the fourth side top clamping arm is connected to a fourth height adjustment mechanism.

[0008] Furthermore, in the above-mentioned positioning and clamping fixture structure for the excavator boom, the fifth side top clamping arm is connected to a fifth height adjustment mechanism, and the sixth side top clamping arm is connected to a sixth height adjustment mechanism.

[0009] Furthermore, in the above-mentioned positioning and clamping fixture structure of the excavator boom, the large end support mechanism includes a connecting frame, a support baffle connected to the connecting frame, a support swing arm pivotally connected to the connecting frame, and a drive cylinder connected between the connecting frame and the support swing arm; the cylinder body of the drive cylinder is pivotally connected to the connecting frame, and the piston rod end of the drive cylinder is pivotally connected to the support swing arm.

[0010] Furthermore, in the above-mentioned positioning and clamping fixture structure for the excavator boom, the large-end support mechanism also includes a Y-guide rail, and the first adjustable height support seat and the first fixed height support seat are slidably connected to the Y-guide rail.

[0011] The beneficial effects of this utility model are as follows: it can accurately position and clamp excavator booms of different specifications and models. In particular, in terms of the support structure, a first adjustable height support seat and a second adjustable height support seat are designed to be arranged diagonally. During the hoisting and pre-centering of the excavator boom body and the position adjustment by measuring the distance through the laser sensor, the first and second adjustable height support seats are not provided with support. This facilitates the adjustment of the lateral sway position of the excavator boom body. After the adjustment is in place and the lateral clamping is in place, the first and second adjustable height support seats are used to lift the boom body to support the lower part of the excavator boom body, forming a 4-point stable support, thereby further improving the clamping accuracy and stability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the positioning and clamping fixture in an unloaded state according to a specific embodiment of the present utility model; Figure 2 This is a structural diagram illustrating the positioning and clamping fixture clamping the excavator boom body in a specific embodiment of this utility model. Figure 3 This is a top view of the positioning and clamping fixture in an unloaded state according to a specific embodiment of the present utility model. Figure 4 This is a cross-sectional view of the internal structure of the first adjustable height support seat according to a specific embodiment of the present utility model; Label Explanation: 1. Excavator boom body; 11. Large end boom; 12. Small end boom; 2. Positioning and clamping fixture; 21. Frame; 22. Large end support mechanism; 221. Connecting frame; 222. Support baffle; 223. Pressing swing arm; 224. Drive cylinder; 23. Large end support mechanism; 231. First fixed height support seat; 232. First adjustable height support seat; 2321. Lifting cylinder; 23211. Limiting inclined surface; 2322. Support seat body; 2323. Side limiting cylinder; 233. Y-guide rail; 24. Large end pre-centering mechanism; 241. First centering clamping arm; 242. Second centering clamping arm; 25. First side lifting mechanism; 251. First side lifting clamping arm; 2511. First height adjustment mechanism; 252. Second side lifting clamping arm; 2521. Second height adjustment mechanism; 26. First X-guide rail; 27. Second side lifting mechanism; 271. Third side... Top clamping arm; 2711, Third height adjustment mechanism; 272, Fourth side top clamping arm; 2721, Fourth height adjustment mechanism; 273, First laser rangefinder; 274, Second laser rangefinder; 28, First slide; 29, Second X-axis guide rail; 210, Second slide; 211, Third side top mechanism; 2111, Fifth side top clamping arm; 21111, Fifth height adjustment mechanism; 2112, Sixth side top clamping arm; 21121, Sixth height adjustment mechanism; 212, Small end pre-centering mechanism; 2121, Third centering clamping arm; 2122, Fourth centering clamping arm; 213, Small end support mechanism; 2131, Second adjustable height support seat; 2132, Second fixed height support seat; 214, Third X-axis guide rail; 215, Third slide; 216, Small end pushing mechanism. Detailed Implementation

[0013] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0014] Please refer to Figures 1 to 4 The specific embodiment of this utility model relates to a positioning and clamping fixture for an excavator boom, based on an excavator boom body 1, which is L-shaped and includes an L-shaped arm composed of a large end arm 11 and a small end arm 12. The positioning and clamping fixture 2 includes: Rack 21; The large end support mechanism 22 is connected to the frame 21 and is used to support and position the end of the large end arm 11 of the excavator boom body 1. The large end support mechanism 23 is connected to the frame 21 and is located on the X-direction side of the large end top abutment mechanism 22. It includes a first fixed height support seat 231 and a first adjustable height support seat 232 distributed along the Y-direction. The large-end pre-centering mechanism 24 is connected to the frame 21 and located on the X-direction side of the large-end support mechanism 23. It includes a first centering clamping arm 241 and a second centering clamping arm 242 arranged symmetrically, and is used for the side pre-centering of the large-end arm 11 of the excavating boom body 1. The first side top mechanism 25 is connected to the frame 21 and is located on the X-direction side of the large end pre-centering mechanism 24. It includes a first side top clamping arm 251 and a second side top clamping arm 252 that are symmetrically arranged, and is used for positioning and clamping the large end arm 11 of the excavator boom body 1. The first X-axis guide rail 26 is connected to the frame 21 and is located on the X-axis side of the first side top mechanism 25; The second top-feeding mechanism is slidably connected to the first X-guide rail 26 via the first slide block 28. The second side-feeding mechanism 27 includes a third side-feeding clamping arm 271 and a fourth side-feeding clamping arm 272 symmetrically arranged for positioning and clamping the side of the middle section of the excavating boom body 1; and a first laser rangefinder 273 and a second laser rangefinder 274 symmetrically arranged. The second X-axis guide rail 29 is connected to the frame 21 and is located on the X-direction side of the first X-axis guide rail 26; The second slide block 210 is slidably connected to the second X-guide rail 29; The third side top mechanism 211 is connected to the second slide block 210. The third side top mechanism 211 includes a fifth side top clamping arm 2111 and a sixth side top clamping arm 2112 arranged symmetrically, which are used for positioning and clamping the side of the small end arm 12 of the excavator boom body 1. The small end pre-centering mechanism 212 is connected to the second slide 210 and is located on the X-direction side of the third side top mechanism 211. It includes a third centering clamping arm 2121 and a fourth centering clamping arm 2122 that are symmetrically arranged, and is used for the side pre-centering of the small end arm 12 of the excavator boom body 1. The small end support mechanism 213 is connected to the second slide 210 and is located on the X-direction side of the small end centering mechanism. It includes a second adjustable height support 2131 and a second fixed height support 2132 distributed along the Y-direction. The third X-axis guide rail 214 is connected to the second slide block 210 and is located on the X-axis side of the small end support mechanism 213; The third slide block 215 is slidably connected to the third X-guide rail 214; The small end pushing mechanism 216 is connected to the third slide 215 and is used to push against the end of the small end arm 12 of the excavator boom body 1. The positioning and clamping method includes the following steps: S1: Adjust the positions of the first slide block 28, the second slide block 210 and the third slide block 215 according to the model and specifications of the excavator boom body 1; adjust the height of the first adjustable height support 232 so that its height is lower than the height of the first fixed height support 231; adjust the height of the second adjustable height support 2131 so that its height is lower than the height of the second fixed height support 2132. S2: Hoist the excavator boom body 1 to the positioning and clamping fixture 2, so that the X-direction-averse end of the large end boom 11 abuts against the large end support mechanism 22, the lower part of the large end boom 11 is supported on the first fixed height support seat 231, and the lower part of the small end boom 12 is supported on the second fixed height support seat 2132. S3: Control the third slide block 215 to move away from the X direction, so that the small end pushing mechanism 216 pushes the X end of the small end arm 12, so that the excavator boom body 1 is positioned in the X direction. S4: Control the first centering clamping arm 241 and the second centering clamping arm 242 of the large end pre-centering mechanism 24 to pre-center the side of the large end arm 11, and control the third centering clamping arm 2121 and the fourth centering clamping arm 2122 of the small end pre-centering mechanism 212 to pre-center the side of the small end arm 12. S5: Control the first laser ranging sensor 273 and the second laser ranging sensor 274 to perform laser ranging on both sides of the middle part of the excavator boom body 1. Adjust the position of the third side top clamping arm 271 and the fourth side top clamping arm 272 according to the ranging result. When the difference between the distance between the two sides detected by the first laser ranging sensor 273 and the second laser ranging sensor 274 is less than 1mm, stop adjusting the third side top clamping arm 271 and the fourth side top clamping arm 272. S6: Control the first side top clamping arm 251, the second side top clamping arm 252, the fifth side top clamping arm 2111 and the sixth side top clamping arm 2112 to position and clamp the excavator boom respectively; S7: Adjust the first adjustable height support 232 so that it supports the bottom of the large end of the excavator boom body 1, and adjust the second adjustable height support 2131 so that it supports the bottom of the small end of the excavator boom body 1.

[0015] In a preferred embodiment, the first adjustable height support 232 includes a lifting cylinder 2321 and a support body 2322 connected to the upper end of the lifting cylinder 2321. The piston rod of the lifting cylinder 2321 is provided with a limiting inclined surface 23211 on its side, and a side limiting cylinder 2323 is provided on the side of the lifting cylinder 2321. The end of the piston rod of the side limiting cylinder 2323 is directly opposite to the limiting inclined surface 23211. In S7, adjusting the first adjustable height support 232 to support the bottom of the large end of the excavator boom body 1 specifically involves controlling the lifting cylinder 2321 to drive the support body 2322 to support the bottom of the large end of the excavator boom body 1, and controlling the side limiting cylinder 2323 to press and lock against the limiting inclined surface 23211.

[0016] In a preferred embodiment, the first side top clamping arm 251 is connected to a first height adjustment mechanism 2511, and the second side top clamping arm 252 is connected to a second height adjustment mechanism 2521; S1 also includes a first height adjustment mechanism 2511 and a second height adjustment mechanism 2521 that adjust according to the model and specifications of the excavator boom body 1.

[0017] In the above embodiments, the first height adjustment mechanism 2511 and the second height adjustment mechanism 2521 can be vertical screw guide rail mechanisms, and the first side top clamping arm 251 and the second side top clamping arm 252 can be clamping arms connected by a side top oil cylinder, which is connected to the slide of the screw guide rail mechanism.

[0018] In a preferred embodiment, the third side top clamping arm 271 is connected to a third height adjustment mechanism 2711, and the fourth side top clamping arm 272 is connected to a fourth height adjustment mechanism 2721. S1 also includes a third height adjustment mechanism 2711 and a fourth height adjustment mechanism 2721 that adjust according to the model and specifications of the excavator boom body 1.

[0019] In the above embodiments, the third height adjustment mechanism 2711 and the fourth height adjustment mechanism 2721 can be vertical screw guide rail mechanisms, and the third side top clamping arm 271 and the fourth side top clamping arm 272 can be clamping arms connected by side top oil cylinders, with the side top oil cylinders connected to the slide of the screw guide rail mechanism.

[0020] In a preferred embodiment, the fifth side top clamping arm 2111 is connected to a fifth height adjustment mechanism 21111, and the sixth side top clamping arm 2112 is connected to a sixth height adjustment mechanism 21121; S1 also includes a fifth height adjustment mechanism 21111 and a sixth height adjustment mechanism 21121 that adjust according to the model and specifications of the excavator boom body 1.

[0021] In the above embodiments, the fifth height adjustment mechanism 21111 and the sixth height adjustment mechanism 21121 can be vertical screw guide rail mechanisms, and the fifth side top clamping arm 2111 and the sixth side top clamping arm 2112 can be clamping arms connected by side top oil cylinders, with the side top oil cylinders connected to the slide of the screw guide rail mechanism.

[0022] In a preferred embodiment, the large end abutting mechanism 22 includes a connecting frame 221, an abutting baffle 222 connected to the connecting frame 221, a pressing swing arm 223 pivotally connected to the connecting frame 221, and a drive cylinder 224 connected between the connecting frame 221 and the pressing swing arm 223; the cylinder body of the drive cylinder 224 is pivotally connected to the connecting frame 221, and the piston rod end of the drive cylinder 224 is pivotally connected to the pressing swing arm 223; S7 also includes controlling the drive cylinder 224 to drive the pressing arm 223 to swing downward and press against the upper part of the large end of the excavator boom body 1.

[0023] In a preferred embodiment, the large-end support mechanism 23 further includes a Y-guide rail 233, and the first adjustable height support seat 232 and the first fixed height support seat 231 are slidably connected to the Y-guide rail 233. S1 also includes adjusting the distance between the first adjustable height support 232 and the first fixed height support 231 according to the model and specifications of the excavator boom body 1.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A positioning and clamping fixture for an excavating boom, based on the excavating boom body, wherein the excavating boom body is L-shaped and comprises an L-shaped arm consisting of a large end arm and a small end arm; Its features are, The positioning and clamping fixture includes: frame; The large end support mechanism is connected to the frame and is used to support and position the end of the large end arm of the excavator boom body. The large-end support mechanism is connected to the frame and located on the X-direction side of the large-end top abutment mechanism, including a first fixed-height support seat and a first adjustable-height support seat distributed along the Y-direction; The large-end pre-alignment mechanism is connected to the frame and located on the X-direction side of the large-end support mechanism. It includes a first alignment clamp arm and a second alignment clamp arm that are symmetrically arranged and are used for the side pre-alignment of the large-end arm of the excavator boom body. The first side top mechanism is connected to the frame and located on the X-direction side of the large end pre-centering mechanism. It includes a first side top clamping arm and a second side top clamping arm that are symmetrically arranged and used for positioning and clamping the large end arm of the excavator boom body. The first X-axis guide rail is connected to the frame and is located on the X-axis side of the first side top mechanism; The second top-mounting mechanism is slidably connected to the first X-guide rail via the first slide block. The second side-mounting mechanism includes a third side-mounting clamping arm and a fourth side-mounting clamping arm arranged symmetrically for positioning and clamping the side of the middle section of the excavator boom body; and a first laser rangefinder and a second laser rangefinder arranged symmetrically. The second X-axis guide rail is connected to the frame and is located on the X-axis side of the first X-axis guide rail; The second slide block is slidably connected to the second X-guide rail; The third side top mechanism is connected to the second slide block. The third side top mechanism includes a fifth side top clamping arm and a sixth side top clamping arm that are symmetrically arranged, which are used for positioning and clamping the side of the small end arm of the excavator boom body. The small-end pre-centering mechanism is connected to the second slide and located on the X-direction side of the third side top mechanism. It includes a symmetrically arranged third centering clamping arm and a fourth centering clamping arm, which are used for the side pre-centering of the small-end arm of the excavator boom body. The small end support mechanism is connected to the second slide and is located on the X-direction side of the small end centering mechanism. It includes a second adjustable height support seat and a second fixed height support seat distributed along the Y-direction. The third X-axis guide rail is connected to the second slide and is located on the X-axis side of the small end support mechanism; The third slide block is slidably connected to the third X-axis guide rail; The small-end jacking mechanism is connected to the third slide block and is used to push against the end of the small-end arm of the excavator boom body.

2. The positioning and clamping fixture for the excavator boom according to claim 1, characterized in that, The first adjustable height support includes a lifting cylinder and a support body connected to the upper end of the lifting cylinder. The piston rod of the lifting cylinder is provided with a limiting slope on its side, and a side limiting cylinder is provided on the side of the lifting cylinder. The end of the piston rod of the side limiting cylinder is directly opposite the limiting slope.

3. The positioning and clamping fixture for the excavator boom according to claim 1, characterized in that, The first side top clamping arm is connected to a first height adjustment mechanism, and the second side top clamping arm is connected to a second height adjustment mechanism.

4. The positioning and clamping fixture for the excavator boom according to claim 1, characterized in that, The third side top clamping arm is connected to a third height adjustment mechanism, and the fourth side top clamping arm is connected to a fourth height adjustment mechanism.

5. The positioning and clamping fixture for the excavator boom according to claim 1, characterized in that, The fifth side top clamping arm is connected to a fifth height adjustment mechanism, and the sixth side top clamping arm is connected to a sixth height adjustment mechanism.

6. The positioning and clamping fixture for the excavator boom according to claim 1, characterized in that, The large end support mechanism includes a connecting frame, a support baffle connected to the connecting frame, a support arm pivotally connected to the connecting frame, and a drive cylinder connected between the connecting frame and the support arm; the cylinder body of the drive cylinder is pivotally connected to the connecting frame, and the piston rod end of the drive cylinder is pivotally connected to the support arm.

7. The positioning and clamping fixture for the excavator boom according to claim 1, characterized in that, The large-end support mechanism also includes a Y-guide rail, and a first adjustable height support seat and a first fixed height support seat are slidably connected to the Y-guide rail.

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