Multi-link support arm welding tool
By designing a welding fixture for multi-rod supports, and utilizing the combined structure of upper and lower clamping members and connecting rods, the problems of inconvenient welding operation and welding quality were solved, and high-precision welding of multi-rod supports was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI JIUZHOU YUNJIAN AEROSPACE TECH CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-07
AI Technical Summary
When welding the multi-link support arm of the rocket engine servo mechanism, the operation is inconvenient due to space constraints, the welding stress is high, there is a risk of welding cracks, and the welding quality is difficult to guarantee, making rework impossible.
Design a welding fixture for a multi-rod support arm, including an upper clamping member, a lower clamping member, and a connecting rod. The upper clamping member is clamped to the upper support arm, and the lower clamping member is clamped to the lower support arm. The upper and lower support arms are connected by the connecting rod to ensure relative fixation. The connecting rods and bolts are arranged in a figure-eight pattern for detachable connection to ensure positioning accuracy.
It improves the welding precision and support effect of multi-link arms on servo mechanisms, ensuring welding quality. The structure is simple and the connection is reliable and not easy to loosen.
Smart Images
Figure CN224464026U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of welding fixtures, and in particular relates to a welding fixture for a multi-rod support arm. Background Technology
[0002] For rocket engines with servo mechanisms 6, such as Figure 1 and Figure 2 As shown, the servo mechanism's support arm is composed of multiple rod-shaped support arms (including the upper support arm 4 and the lower support arm 5). It is required to ensure its shape and position dimensions after welding to ensure that there are no welding defects at the weld. If it is directly welded to the servo mechanism's support arm seat, it is inconvenient to operate due to space constraints, the welding stress is large, there is a risk of welding cracks, and the welding quality cannot be guaranteed, resulting in the inability to rework after welding. Utility Model Content
[0003] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a welding fixture for multi-rod support arms with simple structure and high welding precision.
[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a welding fixture for a multi-rod support arm, comprising an upper clamping member, a lower clamping member, and a connecting rod, wherein the upper clamping member is used to clamp the upper support arm, the lower clamping member is used to clamp the lower support arm, and the connecting rod is placed between the upper clamping member and the lower clamping member, with both ends of the connecting rod connected to the upper clamping member and the lower clamping member, respectively.
[0005] The beneficial effects of the above technical solution are as follows: the upper arm can be clamped by the upper clamping member, and the lower arm can be clamped by the lower clamping member. The upper clamping member and the lower clamping member are connected by a connecting rod, so that the position between the upper arm and the lower arm can be relatively fixed, which is conducive to improving the welding accuracy of multi-rod arms on the servo mechanism.
[0006] The above technical solution includes two connecting rods, which are spaced apart in the left-right direction and arranged in a figure-eight shape. The upper end of each connecting rod is connected to the upper hoop connector, and the lower end of each connecting rod is connected to the lower hoop connector.
[0007] The beneficial effect of the above technical solution is that it makes the support effect of the entire multi-bar arm welding fixture better.
[0008] The upper clamping member described in the above technical solution includes a first upper clamping plate and a first lower clamping plate. Both the first upper clamping plate and the first lower clamping plate are arranged in the left-right direction, and the middle of the first upper clamping plate and the first lower clamping plate on the side closest to each other has a first groove. The first grooves are distributed in the front-back direction. The area between the two first grooves is used to accommodate the upper support arm. The two ends of the first upper clamping plate and the first lower clamping plate are detachably connected so that the upper support arm can be clamped by the first upper clamping plate and the first lower clamping plate together.
[0009] The advantages of the above technical solution are: its structure is simple and it allows the upper clamping plate to be securely clamped to the upper support arm.
[0010] The upper coupling in the above technical solution also includes a first bolting member. Both ends of the first upper coupling plate and the first lower coupling plate are provided with a first through hole that runs vertically through them. The first through holes at the same end of the first upper coupling plate and the first lower coupling plate are aligned vertically to allow the first bolting member to connect.
[0011] The beneficial effect of the above technical solution is that the two ends of the first upper clamping plate and the first lower clamping plate are detachably connected by bolts, which has a good connection effect and is not easy to loosen.
[0012] In the above technical solution, the first bolted component includes a first bolt and a first nut. The first bolt passes through two corresponding first through holes, and the first nut is threadedly connected to the threaded end of the first bolt.
[0013] The beneficial effect of the above technical solution is that its structure is simple.
[0014] The above technical solution describes the provision of two lower support arms, which are spaced apart in the left-right direction.
[0015] The beneficial effect of the above technical solution is that it makes the combination of the upper arm and the two lower arms provide better support.
[0016] The lower clamping member described in the above technical solution includes a second upper clamping plate and a second lower clamping plate. Both the second upper clamping plate and the second lower clamping plate are arranged in the left-right direction. Two second grooves are provided in the middle of the side of the second upper clamping plate and the second lower clamping plate that are close to each other in the left-right direction. The second grooves are distributed in the front-back direction. The second grooves on the same side of the second upper clamping plate and the second lower clamping plate are aligned vertically and used to jointly accommodate one lower support arm. The two ends of the second upper clamping plate and the second lower clamping plate are detachably connected so that the two lower support arms are clamped together by the second upper clamping plate and the second lower clamping plate.
[0017] The beneficial effect of the above technical solution is that it allows the lower clamping member to be clamped to both lower support arms at the same time, which enables the multi-rod support arm welding fixture to more accurately position the upper and lower support arms.
[0018] The lower coupling in the above technical solution also includes a second bolted member. Both ends of the second upper coupling plate and the second lower coupling plate are provided with a second through hole that runs vertically through them. The second through holes at the same end of the second upper coupling plate and the second lower coupling plate are aligned vertically to allow the second bolted member to connect.
[0019] The beneficial effect of the above technical solution is that the two ends of the second upper clamping plate and the second lower clamping plate can be detachably connected by the second bolt, which has a good connection effect and is not easy to loosen.
[0020] In the above technical solution, the second bolted component includes a second bolt and a second nut. The second bolt passes through two corresponding second through holes, and the second nut is threadedly connected to the threaded end of the second bolt.
[0021] The beneficial effect of the above technical solution is that its structure is simple.
[0022] In the above technical solution, both the lower support arm and the lower clamp are vertically inclined.
[0023] The beneficial effect of the above technical solution is that it allows the lower hoop connector to match the tilt angle of the lower support arm, thereby ensuring the welding accuracy of the multi-rod support arm. Attached Figure Description
[0024] Figure 1 An elevation view of the existing servo mechanism;
[0025] Figure 2 An elevation view of the multi-link support arm of an existing servo mechanism;
[0026] Figure 3 This is an elevation view of the multi-bar support arm welding fixture described in this embodiment of the invention during assembly.
[0027] Figure 4 This is an elevation view of the welding fixture for the multi-bar support arm described in this embodiment of the invention being assembled on the multi-bar support arm;
[0028] Figure 5 This is a front view of the welding fixture for the multi-bar support arm described in this embodiment of the invention being assembled on the multi-bar support arm;
[0029] Figure 6 This is a front view of the upper hoop joint of the multi-rod support arm welding fixture described in this embodiment of the utility model when it is in a horizontal position;
[0030] Figure 7This is a front view of the lower hoop joint of the multi-rod support arm welding fixture described in this embodiment of the utility model when it is in a horizontal position.
[0031] In the diagram: 1. Upper clamping member; 11. First upper clamping plate; 12. First lower clamping plate; 13. First groove; 14. First bolted member; 141. First bolt; 142. First nut; 15. First through hole; 2. Lower clamping member; 21. Second upper clamping plate; 22. Second lower clamping plate; 23. Second groove; 24. Second bolted member; 241. Second bolt; 242. Second nut; 25. Second through hole; 3. Connecting rod; 4. Upper support arm; 5. Lower support arm; 6. Servo mechanism. Detailed Implementation
[0032] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.
[0033] like Figure 3 As shown, this embodiment provides a welding fixture for a multi-link support arm, including an upper clamping member 1, a lower clamping member 2, and a connecting rod 3. The upper clamping member 1 is used to clamp the upper support arm 4, and the lower clamping member 2 is used to clamp the lower support arm 5. The connecting rod 3 is placed between the upper clamping member 1 and the lower clamping member 2, and both ends of the connecting rod 3 are connected to the upper clamping member 1 and the lower clamping member 2, respectively. In this way, the upper clamping member can clamp the upper support arm, and the lower clamping member can clamp the lower support arm. The upper clamping member and the lower clamping member are connected by the connecting rod, so that the position between the upper support arm and the lower support arm can be relatively fixed, which is beneficial to improving the welding accuracy of the multi-link support arm on the servo mechanism.
[0034] like Figures 3-7 As shown, the above technical solution has two connecting rods 3, which are spaced apart in the left and right direction and arranged in a figure-eight shape. The upper end of each connecting rod 3 is connected to the upper hoop 1, and the lower end of each connecting rod 3 is connected to the lower hoop 2. This makes the support effect of the entire multi-rod support arm welding fixture better.
[0035] like Figure 5 and Figure 6As shown, the upper clamping member 1 in the above technical solution includes a first upper clamping plate 11 and a first lower clamping plate 12. The first upper clamping plate 11 and the first lower clamping plate 12 are both arranged in the left-right direction, and the first upper clamping plate 11 and the first lower clamping plate 12 have a first groove 13 in the middle of one side close to each other. The first groove 13 is distributed in the front-back direction. The area between the two first grooves 13 is used to accommodate the upper support arm 4. The two ends of the first upper clamping plate 11 and the first lower clamping plate 12 are detachably connected so that the upper support arm 4 can be clamped by the first upper clamping plate 11 and the first lower clamping plate 12. Its structure is simple and makes the upper clamping plate securely clamped to the upper support arm.
[0036] like Figure 5 and Figure 6 As shown, the upper clamping member 1 in the above technical solution also includes a first bolting member 14. Both ends of the first upper clamping plate 11 and the first lower clamping plate 12 are provided with a first through hole 15 that runs vertically through them. The first through holes 15 at the same end of the first upper clamping plate 11 and the first lower clamping plate 12 are aligned vertically for connection by the first bolting member 14. This allows the two ends of the first upper clamping plate and the first lower clamping plate to be detachably connected by bolting members, resulting in a good connection effect and preventing loosening.
[0037] like Figure 5 and Figure 6 As shown, in the above technical solution, the first bolt 14 includes a first bolt 141 and a first nut 142. The first bolt 141 passes through the two corresponding first through holes 15, and the first nut 142 is threaded to the threaded end of the first bolt 141. Its structure is simple.
[0038] like Figures 1-7 As shown, the lower support arm 5 in the above technical solution is provided with two arms, and the two lower support arms 5 are distributed at intervals in the left and right directions, so that the combined support effect of the upper support arm and the two lower support arms is better.
[0039] like Figures 5-7As shown, the lower clamping member 2 in the above technical solution includes a second upper clamping plate 21 and a second lower clamping plate 22. Both the second upper clamping plate 21 and the second lower clamping plate 22 are arranged in the left-right direction, and two second grooves 23 are provided in the middle of the side of the second upper clamping plate 21 and the second lower clamping plate 22 that are close to each other in the left-right direction. The second grooves 23 are distributed in the front-back direction. The second grooves 23 on the same side of the second upper clamping plate 21 and the second lower clamping plate 22 are aligned vertically and used to accommodate one lower support arm 5. The two ends of the second upper clamping plate 21 and the second lower clamping plate 22 are detachably connected so that the two lower support arms 5 are clamped together by the second upper clamping plate 21 and the second lower clamping plate 22. This allows the lower clamping member to be clamped on the two lower support arms at the same time, so that the multi-rod support arm welding fixture can more accurately position the upper support arm and the lower support arm.
[0040] like Figure 7 As shown, the lower clamping member 2 in the above technical solution also includes a second bolting member 24. Both ends of the second upper clamping plate 21 and the second lower clamping plate 22 are provided with a second through hole 25 that runs vertically through them. The second through holes 25 at the same end of the second upper clamping plate 21 and the second lower clamping plate 22 are aligned vertically for connection by the second bolting member 24. This allows the two ends of the second upper clamping plate and the second lower clamping plate to be detachably connected by the second bolting member, resulting in a good connection effect and preventing loosening.
[0041] like Figure 7 As shown, in the above technical solution, the second bolt 24 includes a second bolt 241 and a second nut 242. The second bolt 241 passes through two corresponding second through holes 25, and the second nut 242 is threaded to the threaded end of the second bolt 241. Its structure is simple.
[0042] like Figure 3 As shown, in the above technical solution, both the lower support arm 5 and the lower clamping member 2 are vertically inclined, so that the lower clamping member can match the inclination angle of the lower support arm, thereby ensuring the welding accuracy of the multi-rod support arm.
[0043] Preferably, the two lower support arms are not parallel to each other (their extensions have a certain angle). In this case, the two second grooves 23 on the same side of the lower clamping member form a clamping hole, and the two clamping holes of the lower clamping member are not parallel to each other and cooperate with the two lower support arms.
[0044] In this embodiment, the upper end of each connecting rod is connected to the lower end of the first lower clamping plate, and its lower end is connected to the upper end of the second upper clamping plate.
[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.
Claims
1. A welding fixture for a multi-bar support arm, characterized in that, It includes an upper clamping member (1), a lower clamping member (2) and a connecting rod (3). The upper clamping member (1) is used to clamp the upper support arm (4), the lower clamping member (2) is used to clamp the lower support arm (5), and the connecting rod (3) is placed between the upper clamping member (1) and the lower clamping member (2). The two ends of the connecting rod (3) are respectively connected to the upper clamping member (1) and the lower clamping member (2).
2. The welding fixture for multi-bar support arms according to claim 1, characterized in that, Two connecting rods (3) are provided. The two connecting rods (3) are distributed at intervals in the left and right directions and are arranged in a figure-eight shape. The upper end of each connecting rod (3) is connected to the upper hoop (1), and the lower end of each connecting rod (3) is connected to the lower hoop (2).
3. The welding fixture for multi-bar support arms according to claim 1, characterized in that, The upper clamping member (1) includes a first upper clamping plate (11) and a first lower clamping plate (12). The first upper clamping plate (11) and the first lower clamping plate (12) are both arranged in the left-right direction. The first upper clamping plate (11) and the first lower clamping plate (12) have a first groove (13) in the middle of one side close to each other. The first groove (13) is distributed in the front-back direction. The area between the two first grooves (13) is used to accommodate the upper support arm (4). The two ends of the first upper clamping plate (11) and the first lower clamping plate (12) are detachably connected so that the upper support arm (4) can be clamped by the first upper clamping plate (11) and the first lower clamping plate (12).
4. The welding fixture for multi-bar support arms according to claim 3, characterized in that, The upper clamping member (1) also includes a first bolting member (14). Both ends of the first upper clamping plate (11) and the first lower clamping plate (12) are provided with a first through hole (15) that runs vertically through the upper and lower parts. The first through holes (15) at the same end of the first upper clamping plate (11) and the first lower clamping plate (12) are aligned vertically for connection by the first bolting member (14).
5. The welding fixture for multi-bar support arms according to claim 4, characterized in that, The first bolt (14) includes a first bolt (141) and a first nut (142). The first bolt (141) passes through two corresponding first through holes (15), and the first nut (142) is threaded to the threaded end of the first bolt (141).
6. The welding fixture for multi-bar support arms according to claim 1, characterized in that, The lower support arm (5) is provided in two parts, and the two lower support arms (5) are distributed at intervals in the left and right directions.
7. The welding fixture for multi-bar support arms according to claim 6, characterized in that, The lower clamping member (2) includes a second upper clamping plate (21) and a second lower clamping plate (22). The second upper clamping plate (21) and the second lower clamping plate (22) are both arranged in the left-right direction. The second upper clamping plate (21) and the second lower clamping plate (22) are provided with two second grooves (23) that are spaced apart in the left-right direction in the middle of the side close to each other. The second grooves (23) are distributed in the front-back direction. The second grooves (23) on the same side of the second upper clamping plate (21) and the second lower clamping plate (22) are aligned vertically and used to accommodate one lower support arm (5). The two ends of the second upper clamping plate (21) and the second lower clamping plate (22) are detachably connected so that the two lower support arms (5) are clamped together by the second upper clamping plate (21) and the second lower clamping plate (22).
8. The welding fixture for a multi-bar support arm according to claim 7, characterized in that, The lower clamping member (2) also includes a second bolting member (24). Both ends of the second upper clamping plate (21) and the second lower clamping plate (22) are provided with a second through hole (25) that runs vertically through the upper and lower parts. The second through holes (25) at the same end of the second upper clamping plate (21) and the second lower clamping plate (22) are aligned vertically for the second bolting member (24) to connect.
9. The welding fixture for a multi-bar support arm according to claim 8, characterized in that, The second bolt (24) includes a second bolt (241) and a second nut (242), the second bolt (241) passing through two corresponding second through holes (25), and the second nut (242) being threaded to the threaded end of the second bolt (241).
10. The welding fixture for multi-bar support arms according to any one of claims 1-9, characterized in that, Both the lower support arm (5) and the lower clamping member (2) are vertically inclined.