Movable arm connecting rod structure assembling and welding jig and loader movable arm connecting rod

Abstract

The utility model relates to a movable arm connecting rod structure assembling and welding jig and a loader movable arm connecting rod, the movable arm connecting rod structure assembling and welding jig comprises a fixing plate, a first positioning part and a second positioning part, the first positioning part comprises a first limiting rod, a second limiting rod, a first support, a second support and a positioning sleeve; the first limiting rod and the second limiting rod are arranged at the top of the fixing plate, first vertical plates are arranged at the two ends of the first limiting rod, second vertical plates are arranged at the two ends of the second limiting rod, and the first vertical plates and the second vertical plates are connected with the fixing plate; the first support and the second support are arranged between the first limiting rod and the second limiting rod; the second positioning part comprises a third limiting rod, a backup plate and a movable limiting rod, and third vertical plates are arranged at the two ends of the third limiting rod; the backup plate is arranged at the tops of the first support and the second support, and the movable limiting rod is arranged at the top of the fixing plate. According to the positioning device, all parts of the movable arm connecting rod structure can be accurately positioned, the follow-up correction time of welding is shortened, and the welding quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery parts assembly technology, and in particular to a boom connecting rod structure assembly welding fixture and a loader boom connecting rod. Background Technology

[0002] The boom linkage mechanism of a loader is a core component of its working device, mainly responsible for controlling the movement trajectory and posture of the bucket to realize the loading, lifting, transportation and unloading of materials.

[0003] The boom link of a loader has long components and a complex bending structure. In addition, the end of the link has multiple hinge points, so strict control of dimensional accuracy is required during the assembly and welding process.

[0004] In existing technologies, the boom linkage mechanism requires manual marking for positioning during welding and assembly. Operators must manually mark positioning lines on the workpiece surface before temporarily fixing and welding the components according to the marked positions. After assembly, several sets of holes often exhibit concentricity errors, some components are not angled correctly, and the overall frame is diagonally twisted and deformed. This makes it impossible to guarantee welding accuracy, resulting in unqualified and unusable products. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the defects of poor welding precision and low product qualification rate of the boom connecting rod in the prior art.

[0006] To solve the above-mentioned technical problems, this utility model provides a welding fixture for assembling a boom connecting rod structure, comprising:

[0007] Fixing plate;

[0008] The first positioning part includes a first limiting rod, a second limiting rod, a first upright plate, a second upright plate, a first support, a second support, and a positioning sleeve. The first limiting rod and the second limiting rod are disposed on the top of the fixed plate. The first vertical plate is disposed at both ends of the first limiting rod, and the second vertical plate is disposed at both ends of the second limiting rod. Both the first vertical plate and the second vertical plate are connected to the fixed plate. The axis of the first limiting rod is parallel to the axis of the second limiting rod, and both the axes of the first limiting rod and the axis of the second limiting rod are disposed along the X-axis direction. The first support and the second support are disposed between the first limiting rod and the second limiting rod, with the first support disposed closer to the first limiting rod and the second support disposed closer to the second limiting rod.

[0009] The second positioning part includes a third limiting rod, a third upright plate, a backing plate, and a movable limiting rod. The third limiting rod is disposed between the first limiting rod and the first support, and the third upright plate is disposed at both ends of the third limiting rod. The backing plate is disposed on the top of the first support and the second support, and the backing plate is disposed parallel to the fixed plate. The movable limiting rod is disposed on the top of the fixed plate.

[0010] In one embodiment of this utility model, the first upright plate is provided with a first hole that cooperates with the first limiting rod, one end of the first limiting rod is provided with a first locking platform, the size of the first locking platform is larger than the size of the first hole; the other end of the first limiting rod is provided with a first thread.

[0011] In one embodiment of this utility model, a second hole is provided on the second upright plate to cooperate with the second limiting rod, a second locking platform is provided at one end of the second limiting rod, and the size of the second locking platform is larger than the size of the second hole; a second thread is provided at the other end of the second limiting rod.

[0012] In one embodiment of this utility model, the third upright plate is provided with a third hole that cooperates with the third limiting rod, one end of the third limiting rod is provided with a third locking platform, the size of the third locking platform is larger than the size of the third hole; the other end of the third limiting rod is provided with a third thread.

[0013] In one embodiment of the present invention, the top of the first support is provided with a first groove, and the top of the second support is provided with a second groove.

[0014] In one embodiment of this utility model, a support grid is provided between the support plate and the fixing plate, and the fixing plate and the support grid are detachably connected.

[0015] In one embodiment of this utility model, the heights of the first upright plate and the second upright plate are the same, and the heights of the first support and the second support are the same.

[0016] A loading boom link, assembled using a welding fixture for the boom link structure, includes: a support portion and a hinge portion.

[0017] The support includes a first crossbar, a second crossbar, and a support arm; both the first and second crossbars are arranged along the X-axis, and the first crossbar is parallel to the second crossbar; a pair of support arms are arranged at both ends of the first and second crossbars, and the two ends of the support arms are respectively provided with a first connecting hole and a second connecting hole.

[0018] The hinge portion includes a first hinge seat, a second hinge seat, a third hinge seat, and a hinge plate. A pair of first hinge seats are disposed at the top of the first crossbar, a pair of second hinge seats are disposed at the top of the second crossbar, and a pair of third hinge seats are disposed at the bottom of the support arm, with the third hinge seats disposed between the first connecting hole and the first crossbar. A pair of hinge plates are disposed between the pair of support arms, the hinge plates are connected to the first crossbar, and the hinge holes of the hinge plates are coaxially disposed with the first connecting hole.

[0019] In one embodiment of this utility model, a reinforcing plate is provided between the hinge plate and the support arm.

[0020] In one embodiment of the present invention, the first hinge seat is provided with a first slot that cooperates with the first crossbar, and the second hinge seat is provided with a second slot that cooperates with the second crossbar.

[0021] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0022] The present invention discloses a welding fixture for assembling a boom link structure and a loading boom link. The present invention can accurately position each component of the boom link structure, reduce the correction time after welding, avoid the problem of diagonal twisting and deformation of the overall frame, solve the problem of excessive concentricity of the machining holes, and improve the welding quality. Attached Figure Description

[0023] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0026] Figure 3 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0027] Explanation of reference numerals in the accompanying drawings: 1. Fixing plate; 2. First positioning part; 3. Second positioning part; 4. Support part; 5. Hinge part; 21. First limiting rod; 22. Second limiting rod; 23. First upright plate; 24. Second upright plate; 25. First support; 26. Second support; 27. Positioning sleeve; 31. Third limiting rod; 32. Third upright plate; 33. Backing plate; 34. Movable limiting rod; 35. Backing rail; 41. Support arm; 42. First crossbar; 43. 51. Second crossbar; 52. First hinge seat; 53. Second hinge seat; 54. Third hinge seat; 55. Hinge plate; 211. First thread; 212. First locking platform; 221. Second thread; 222. Second locking platform; 251. First groove; 261. Second groove; 311. Third thread; 312. Third locking platform; 411. First connecting hole; 412. Second connecting hole; 511. First slot; 521. Second slot; 541. Third slot. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0029] Example 1

[0030] Reference Figures 1-3 As shown, this utility model discloses a welding fixture for assembling a boom connecting rod structure, comprising:

[0031] Fixing plate 1;

[0032] The first positioning part 2 includes a first limiting rod 21, a second limiting rod 22, a first upright plate 23, a second upright plate 24, a first support 25, a second support 26, and a positioning sleeve 27. The first limiting rod 21 and the second limiting rod 22 are disposed on the top of the fixed plate 1. The first limiting rod 21 has the first upright plate 23 at both ends, and the second limiting rod 22 has the second upright plate 24 at both ends. The first upright plate 23 and the second upright plate 24 are both connected to the fixed plate 1. The axis of the first limiting rod 21 is parallel to the axis of the second limiting rod 22, and both the axis of the first limiting rod 21 and the axis of the second limiting rod 22 are arranged along the X-axis direction. The first support 25 and the second support 26 are disposed between the first limiting rod 21 and the second limiting rod 22. The first support 25 is disposed close to the first limiting rod 21, and the second support 26 is disposed close to the second limiting rod 22.

[0033] The second positioning part 3 includes a third limiting rod 31, a third upright plate 32, a backing plate 33, and a movable limiting rod 34. The third limiting rod 31 is disposed between the first limiting rod 21 and the first support 25, and the third upright plate 32 is disposed at both ends of the third limiting rod 31. The backing plate 33 is disposed on the top of the first support 25 and the second support 26, and the backing plate 33 is disposed parallel to the fixed plate 1. The movable limiting rod 34 is disposed on the top of the fixed plate 1.

[0034] The assembly and welding fixture of this utility model is suitable for assembling the connecting rod of the loading boom. The first positioning part 2 is used for assembling the main structure, and the second positioning part 3 is used for positioning other components. Specifically, in the actual assembly process, the first crossbar 42 and the second crossbar 43 are first installed on the first support 25 and the second support 26 respectively. A pair of support arms 41 and a pair of hinge plates 54 are placed in sequence. The first limiting rod 21 passes through the first connecting hole 411, the first upright plate 23, the positioning sleeve 27 and the hinge plate 54 in sequence. At the same time, the second limiting rod 22 passes through the second connecting hole 412 and the second upright plate 24 in sequence.

[0035] After the above structure is installed, the installation of other components begins. First, a pair of first hinge seats 51 are installed on the first crossbar 42. The coaxiality of the two first hinge seats 51 is limited by the movable limiting rod 34, and the distance between the two second hinge seats 52 is limited by the backing plate 33. Similarly, the positioning of the second hinge seats 52 is the same as that of the first hinge seats 51. However, in the actual welding process, after the first hinge seats 51 are welded, the movable limiting rod 34 is pulled out and then inserted into the second hinge seats 52 for positioning and welding. The distance between the first hinge seats 51 and the second hinge seats 52 is positioned by the backing plate 33. During the welding process, both the first hinge seats 51 and the second hinge seats 52 must be tightly attached to the backing plate 33. The third limiting rod 31 is used for the installation of the third hinge seat 53. During the installation process, the third limiting rod 31 passes through the third hinge seat 53 and the third upright plate 32, and one side of the plane of the third hinge seat 53 is attached to the hinge plate 54 to fix the third hinge seat 53.

[0036] After assembling the aforementioned components with the welding fixture, initial positioning is achieved through spot welding, followed by full welding. This invention enables precise positioning of each component in the boom connecting rod structure, reducing subsequent welding correction time, avoiding diagonal twisting and deformation of the overall frame, resolving the issue of excessive concentricity of machined holes, and improving welding quality.

[0037] Furthermore, the first upright plate 23 has a first hole that mates with the first limiting rod 21. One end of the first limiting rod 21 is provided with a first locking platform 212, the size of which is larger than the size of the first hole. The other end of the first limiting rod 21 is provided with a first thread 211.

[0038] Specifically, after the first limiting rod 21 is inserted, the end with the first locking plate 212 abuts against the first upright plate 23, and a nut is fitted onto the first thread 211 at the other end to fix the first limiting rod 21 and restrict the axial movement of the first limiting rod 21, so that the first limiting rod 21 will fall off during the welding process.

[0039] Similarly, the second upright plate 24 has a second hole that mates with the second limiting rod 22. One end of the second limiting rod 22 has a second locking platform 222, the size of which is larger than the size of the second hole. The other end of the second limiting rod 22 has a second thread 221. This restricts the axial movement of the second limiting rod 22. The third upright plate 32 has a third hole that mates with the third limiting rod 31. One end of the third limiting rod 31 has a third locking platform 312, the size of which is larger than the size of the third hole. The other end of the third limiting rod 31 has a third thread 311. This restricts the axial movement of the third limiting rod 31.

[0040] Furthermore, the top of the first support 25 is provided with a first groove 251, and the top of the second support 26 is provided with a second groove 261.

[0041] Specifically, during the actual installation process, the first crossbar 42 is engaged in the first groove 251, and the second crossbar 43 is engaged in the second groove 261. The first groove 251 and the second groove 261 respectively provide radial positioning for the first crossbar 42 and the second crossbar 43.

[0042] Furthermore, a support grid 35 is provided between the support plate 33 and the fixing plate 1, and the fixing plate 1 and the support grid 35 are detachably connected.

[0043] Specifically, the backing plate 33 is used to position the first hinge 51 and the second hinge 52. To avoid affecting the installation of other components, the backing plate 33 is detachably connected to the bottom support rail 35 by bolts. In the actual installation process, after the first crossbar 42 and the second crossbar 43 are installed, the backing plate 33 is connected to the support rail 35 to position the first hinge 51 and the second hinge 52.

[0044] Furthermore, the heights of the first upright plate 23 and the second upright plate 24 are flush, and the heights of the first support 25 and the second support 26 are flush.

[0045] Example 2

[0046] A loading boom linkage, assembled using the boom linkage structure welding fixture described in Embodiment 1, includes: a support portion 4 and a hinge portion 5.

[0047] The support part 4 includes a first crossbar 42, a second crossbar 43, and a support arm 41; the first crossbar 42 and the second crossbar 43 are both arranged along the X-axis, and the first crossbar 42 is parallel to the second crossbar 43; a pair of support arms 41 are arranged at both ends of the first crossbar 42 and the second crossbar 43, and the two ends of the support arms 41 are respectively provided with a first connecting hole 411 and a second connecting hole 412.

[0048] The hinge portion 5 includes a first hinge seat 51, a second hinge seat 52, a third hinge seat 53, and a hinge plate 54. A pair of first hinge seats 51 are disposed on the top of the first crossbar 42, a pair of second hinge seats 52 are disposed on the top of the second crossbar 43, and a pair of third hinge seats 53 are disposed on the bottom of the support arm 41, with the third hinge seats 53 disposed between the first connecting hole 411 and the first crossbar 42. A pair of hinge plates 54 are disposed between the pair of support arms 41, the hinge plates 54 are connected to the first crossbar 42, and the hinge holes of the hinge plates 54 are coaxially disposed with the first connecting hole 411.

[0049] The welding assembly fixture in Embodiment 1 of this utility model is applicable to the welding of the loading boom linkage in Embodiment 2. The first positioning part 2 in Embodiment 1 is used to position the support part 4, and the second positioning part 3 is used to position the parts of the hinge part 5.

[0050] Furthermore, a reinforcing plate is provided between the hinge plate 54 and the support arm 41.

[0051] Specifically, when the hinge plate 54 is positioned, one end is positioned by the first limiting rod 21, and the other end abuts against the first crossbar 42 to position the hinge plate 54 in the Y-axis and Z-axis directions, and the positioning sleeve 27 positions the hinge plate 54 in the X-axis direction; the reinforcing plate is set between the support arm 41 and the hinge plate 54 to further improve the positioning accuracy of the hinge plate 54, while also ensuring the connection strength of the hinge plate 54.

[0052] Furthermore, the first hinge seat 51 is provided with a first slot 511 that mates with the first crossbar 42, and the second hinge seat 52 is provided with a second slot 521 that mates with the second crossbar 43. This facilitates the fixing of the first hinge seat 51 and the second hinge seat 52. Similarly, the end of the hinge plate 54 that abuts against the first crossbar 42 is provided with a third slot 541 for fixing the hinge plate 54.

[0053] In summary, this utility model introduces a welding fixture for assembling a boom link structure and a loading boom link. This utility model can accurately position each component of the boom link structure, reduce the correction time after welding, avoid the problem of diagonal twisting and deformation of the overall frame, solve the problem of excessive concentricity of the machining holes, and improve the welding quality.

[0054] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A welding fixture for assembling a boom connecting rod structure, characterized in that, include: Fixing plate; The first positioning part includes a first limiting rod, a second limiting rod, a first upright plate, a second upright plate, a first support, a second support, and a positioning sleeve. The first limiting rod and the second limiting rod are disposed on the top of the fixed plate. The first vertical plate is disposed at both ends of the first limiting rod, and the second vertical plate is disposed at both ends of the second limiting rod. Both the first vertical plate and the second vertical plate are connected to the fixed plate. The axis of the first limiting rod is parallel to the axis of the second limiting rod, and both the axes of the first limiting rod and the axis of the second limiting rod are disposed along the X-axis direction. The first support and the second support are disposed between the first limiting rod and the second limiting rod, with the first support disposed closer to the first limiting rod and the second support disposed closer to the second limiting rod. The second positioning part includes a third limiting rod, a third upright plate, a backing plate, and a movable limiting rod. The third limiting rod is disposed between the first limiting rod and the first support, and the third upright plate is disposed at both ends of the third limiting rod. The backing plate is disposed on the top of the first support and the second support, and the backing plate is disposed parallel to the fixed plate. The movable limiting rod is disposed on the top of the fixed plate.

2. The assembly and welding fixture for the boom connecting rod structure according to claim 1, characterized in that: The first upright plate has a first hole that mates with the first limiting rod. One end of the first limiting rod is provided with a first locking platform, the size of which is larger than the size of the first hole. The other end of the first limiting rod is provided with a first thread.

3. The assembly and welding fixture for the boom connecting rod structure according to claim 1, characterized in that: The second vertical plate has a second hole that mates with the second limiting rod. One end of the second limiting rod is provided with a second locking platform, the size of which is larger than the size of the second hole. The other end of the second limiting rod is provided with a second thread.

4. The assembly and welding fixture for the boom connecting rod structure according to claim 1, characterized in that: The third upright plate has a third hole that mates with the third limiting rod. One end of the third limiting rod is provided with a third locking platform, the size of which is larger than the size of the third hole. The other end of the third limiting rod is provided with a third thread.

5. The assembly and welding fixture for the boom connecting rod structure according to claim 1, characterized in that: The top of the first support is provided with a first groove, and the top of the second support is provided with a second groove.

6. The assembly and welding fixture for the boom connecting rod structure according to claim 1, characterized in that: A support rail is provided between the support plate and the fixing plate, and the fixing plate and the support rail are detachably connected.

7. The assembly and welding fixture for the boom connecting rod structure according to claim 1, characterized in that: The first and second uprights are at the same height, and the first support is at the same height as the second support.

8. A loading boom link, assembled using a boom link structure assembly and welding fixture as described in any one of claims 1-7, characterized in that, include: Support and hinge parts, The support includes a first crossbar, a second crossbar, and a support arm; both the first and second crossbars are arranged along the X-axis, and the first crossbar is parallel to the second crossbar; a pair of support arms are arranged at both ends of the first and second crossbars, and the two ends of the support arms are respectively provided with a first connecting hole and a second connecting hole. The hinge portion includes a first hinge seat, a second hinge seat, a third hinge seat, and a hinge plate. A pair of first hinge seats are disposed at the top of the first crossbar, a pair of second hinge seats are disposed at the top of the second crossbar, and a pair of third hinge seats are disposed at the bottom of the support arm, with the third hinge seats disposed between the first connecting hole and the first crossbar. A pair of hinge plates are disposed between the pair of support arms, the hinge plates are connected to the first crossbar, and the hinge holes of the hinge plates are coaxially disposed with the first connecting hole.

9. The loading boom linkage according to claim 8, characterized in that: A reinforcing plate is provided between the hinge plate and the support arm.

10. The loading boom linkage according to claim 8, characterized in that: The first hinge seat is provided with a first slot that cooperates with the first crossbar, and the second hinge seat is provided with a second slot that cooperates with the second crossbar.

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