Pantograph lower arm rod welding tool

Abstract

The utility model discloses a kind of pantograph lower arm rod welding tool, it is related to pantograph technical field, the clamping overturning mechanism includes first motor fixedly connected on the right side of right side support plate, connecting shaft rotationally connected between the inner wall of two support plates and two rotating shafts rotationally connected on the inner wall of two support plates, the surface of first motor output shaft is fixedly connected with first gear, the surface of connecting shaft is fixedly connected with second gear and two first sprocket respectively, the surface of two rotating shafts is fixedly connected with second sprocket, the utility model is fixed by being clamped overturning mechanism, pantograph lower arm rod workpiece is clamped, let it be fixed, prevent displacement when welding causes welding failure, simultaneously can control it to overturn, let its upper and lower two faces can be welded, expand the range of welding, improve welding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pantograph technology, specifically to a welding fixture for the lower arm of a pantograph. Background Technology

[0002] A search revealed Chinese Patent Publication No. CN218695526U, published on March 24, 2023, which discloses a flexible tooling for welding pantograph frames. The tooling includes a worktable with multiple positioning holes arranged on both the tabletop and the surrounding panels. Multiple support members, horizontal fixing members, and vertical fixing members are connected to the tabletop and the surrounding panels. Each support member includes a support base and a mounting rod connected to the bottom of the support base. The horizontal fixing members include an L-shaped mounting block and a quick-release clamp connected to the L-shaped mounting block for horizontal locking. The vertical fixing members include a vertical rod, a horizontal rod, and a vertical locking rod. This invention uses a worktable with multiple positioning holes as a standard platform and designs integrated, detachable support members, horizontal fixing members, and vertical fixing members. This design facilitates easy assembly, disassembly, and adjustment, effectively solving the problems of dimensional positioning and deformation control in mass welding production of pantograph frames, thus improving welding quality and production capacity.

[0003] However, during the processing of this pantograph welding fixture, it is not convenient to automatically rotate the pantograph according to the usage requirements, nor is it convenient to automatically realize the full welding operation of the pantograph lower arm. Manual rotation is not conducive to avoiding the displacement of the pantograph lower arm, which directly affects the accuracy of the welding position of the parts, does not meet the user's needs, and reduces welding efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a welding fixture for the lower boom of a pantograph, thereby solving the technical problems mentioned in the background section.

[0005] The objective of this utility model can be achieved through the following technical solutions: A welding fixture for the lower arm of a pantograph includes a base and an automatic welding device. Two support plates are fixedly connected to the top of the base, and a clamping and flipping mechanism is provided between the two support plates.

[0006] The clamping and flipping mechanism includes a first motor fixedly connected to the right side of the right support plate, a connecting shaft rotatably connected between the inner walls of the two support plates, and two rotating shafts rotatably connected to the inner walls of the two support plates. A first gear is fixedly connected to the surface of the output shaft of the first motor. A second gear and two first sprockets are fixedly connected to the surface of the connecting shaft respectively. A second sprocket is fixedly connected to the surface of each of the two rotating shafts. A chain meshes between each of the two first sprockets and the adjacent second sprocket. A clamping assembly is provided at the opposite end of each of the two rotating shafts. The first gear and the second gear mesh with each other.

[0007] As a further embodiment of this utility model: the clamping assembly on the left side includes a fixing groove fixedly connected to the right end of the left rotating shaft, a third motor fixedly connected to the back of the fixing groove, a double-toothed screw rotatably connected to the inner wall of the fixing groove, a guide rod fixedly connected to the inner wall of the fixing groove, a third gear fixedly connected to the surface of the output shaft of the third motor, a fourth gear fixedly connected to the surface of the double-toothed screw, and two clamping plates slidably connected to the surface of the guide rod. The third gear and the fourth gear mesh with each other, and both clamping plates are threadedly connected to the double-toothed screw.

[0008] As a further embodiment of this utility model: four support columns are fixedly connected to the top of the base, and a top frame is fixedly connected between the top ends of the four support columns, and a motion welding mechanism is provided on the top frame.

[0009] As a further embodiment of this utility model: the motion welding mechanism includes two vertical guide rods and two horizontal guide rods fixedly connected to the inner wall of the top frame. A first slider is slidably connected to the surface of each of the two vertical guide rods. A horizontal motor is fixedly connected to the right side of the first slider on the left side. A horizontal screw is fixedly connected to the output end of the horizontal motor. A second slider is slidably connected to the surface of each of the two horizontal guide rods. A vertical motor is fixedly connected to the front side of the second slider at the rear. A vertical screw is fixedly connected to the output end of the vertical motor. A connecting platform is threaded between the surfaces of the horizontal screw and the vertical screw. The automatic welding device is fixedly connected to the bottom of the connecting platform.

[0010] As a further embodiment of this utility model: the bottom of the base is fixedly connected to four support feet, and the bottom of each of the four support feet is fixedly connected to a support base plate.

[0011] As a further embodiment of this utility model: the two clamping components have the same structure and are symmetrically distributed on opposite ends of the two rotating shafts.

[0012] Beneficial effects This utility model provides a welding fixture for the lower boom of a pantograph. Compared with the prior art, it has the following advantages: (1) By setting up a clamping and flipping mechanism, the workpiece of the lower arm of the pantograph is clamped and fixed to prevent displacement during welding, which would lead to welding failure. At the same time, it can be controlled to flip so that both the upper and lower sides can be welded, thus expanding the welding range and improving welding efficiency.

[0013] (2) By setting up a motion welding mechanism, this utility model can control the automatic welding device 2 to adjust its movement in the front and back directions, as well as its movement in the left and right directions, so that it can move precisely to the welding position for welding. Attached Figure Description

[0014] Figure 1 This is a main body diagram of the present utility model; Figure 2 This is a plan view of the present invention; Figure 3 This is a perspective view of a partial structure of the present invention; Figure 4 This is a perspective view of the clamping and flipping mechanism of this utility model; Figure 5 This is a perspective view of the clamping assembly of this utility model; Figure 6 This is a perspective view of the motion welding mechanism of this utility model.

[0015] In the diagram: 1. Base; 2. Automatic welding device; 3. Support plate; 4. Clamping and flipping mechanism; 41. First motor; 42. Connecting shaft; 43. Rotating shaft; 44. First gear; 45. Second gear; 46. First sprocket; 47. Second sprocket; 48. Chain; 49. Clamping assembly; 491. Fixing groove; 492. Third motor; 493. Double-toothed screw; 494. Guide rod; 495. Third gear; 496. Fourth gear; 497. Clamping plate; 5. Support column; 6. Top frame; 7. Motion welding mechanism; 71. Vertical guide rod; 72. Horizontal guide rod; 73. First slider; 74. Horizontal motor; 75. Horizontal screw; 76. Second slider; 77. Vertical motor; 78. Vertical screw; 79. Connecting platform; 8. Support foot; 9. Support base plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-6As shown, this utility model is a welding fixture for the lower arm of a pantograph, including a base 1 and an automatic welding device 2. Two support plates 3 are fixedly connected to the top of the base 1, and a clamping and flipping mechanism 4 is provided between the two support plates 3. The clamping and flipping mechanism 4 includes a first motor 41 fixedly connected to the right side of the right support plate 3, a connecting shaft 42 rotatably connected between the inner walls of the two support plates 3, and two rotating shafts 43 rotatably connected to the inner walls of the two support plates 3. The first motor 41 is a servo-reduced motor, which can precisely control the rotation speed and rotation angle of the output shaft. The first motor 41 is electrically connected to an external power source and controlled by an external program. A first gear 44 is fixedly connected to the surface of the output shaft of the first motor 41, and the surfaces of the connecting shafts 42 are respectively fixedly connected to... The device is fixedly connected to a second gear 45 and two first sprockets 46. The surfaces of both rotating shafts 43 are fixedly connected to second sprockets 47. Chains 48, made of alloy steel, are meshed between the two first sprockets 46 and adjacent second sprockets 47. These chains 48 are durable and tightly meshed with the two sprockets, preventing slippage, detachment, and breakage. Clamping components 49 are provided at opposite ends of the two rotating shafts 43. The first gear 44 and second gear 45 mesh with each other. By setting a clamping and flipping mechanism 4, the pantograph lower arm workpiece is clamped and fixed, preventing displacement during welding and thus welding failure. Simultaneously, it can be controlled to flip, allowing welding to be performed on both its upper and lower surfaces, expanding the welding range and improving welding efficiency.

[0018] The left clamping assembly 49 includes a fixing groove 491 fixedly connected to the right end of the left rotating shaft 43. A third motor 492 is fixedly connected to the back of the fixing groove 491. A double-toothed screw 493 is rotatably connected to the inner wall of the fixing groove 491. A guide rod 494 is fixedly connected to the inner wall of the fixing groove 491. A third gear 495 is fixedly connected to the surface of the output shaft of the third motor 492. A fourth gear 496 is fixedly connected to the surface of the double-toothed screw 493. Two clamping plates 497 are slidably connected to the surface of the guide rod 494. The third gear 495 and the fourth gear 496 mesh with each other. Both clamping plates 497 are threadedly connected to the double-toothed screw 493. The surface of the double-toothed screw 493 has two sections of screw teeth facing opposite directions. The inner walls of both clamping plates 497 have screw grooves that match the adjacent screw teeth. By setting the motion welding mechanism 7, the automatic welding device 2 can be controlled to move in the forward and backward direction, as well as in the left and right direction, so that it can move precisely to the welding position for welding.

[0019] Four support columns 5 are fixedly connected to the top of the base 1, and a top frame 6 is fixedly connected between the top ends of the four support columns 5. A motion welding mechanism 7 is provided on the top frame 6.

[0020] The motion welding mechanism 7 includes two vertical guide rods 71 ​​and two horizontal guide rods 72 fixedly connected to the inner wall of the top frame 6. A first slider 73 is slidably connected to the surface of each of the two vertical guide rods 71. A horizontal motor 74 is fixedly connected to the right side of the left first slider 73. A horizontal screw 75 is fixedly connected to the output end of the horizontal motor 74. A second slider 76 is slidably connected to the surface of each of the two horizontal guide rods 72. A vertical motor 77 is fixedly connected to the front of the rear second slider 76. Both the horizontal motor 74 and the vertical motor 77 are servo-geared motors, capable of precisely controlling the rotation speed and angle of the output shaft. Both are electrically connected to an external power supply and controlled by an external program. The vertical motor 77 has a vertical screw 78 fixedly connected to its output end. A connecting platform 79 is threaded between the surfaces of the horizontal screw 75 and the vertical screw 78. The inner wall of the connecting platform 79 has two threaded grooves that are compatible with the horizontal screw 75 and the vertical screw 78. The automatic welding device 2 is fixedly connected to the bottom of the connecting platform 79. The automatic welding device 2 is the core welding component in the welding fixture of the lower arm of the pantograph. It achieves efficient welding by inputting welding parameters through a preset PLC program and coordinating with the internal welding mechanism. Since this is existing technology, it will not be described in detail in this article. The automatic welding device 2 is electrically connected to the power supply and is controlled by an external program.

[0021] The bottom of the base 1 is fixedly connected to four support feet 8. The design of multiple support feet 8 ensures the stability of the entire device. The bottom of each of the four support feet 8 is fixedly connected to a support base plate 9.

[0022] The two clamping components 49 have the same structure and are symmetrically distributed on opposite ends of the two rotating shafts 43. Stable clamping is achieved through the cooperation of the two clamping components 49.

[0023] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0024] The working principle of this utility model is as follows: First, the workpiece is placed between four clamping plates 497. Then, the third motor 492 on the left is started, causing it to drive the third gear 495 to rotate via its output shaft. When the third gear 495 rotates, it drives the fourth gear 496, which rotates within the inner wall of the fixing groove 491 via a double-toothed screw 493. When the double-toothed screw 493 rotates, it drives the two clamping plates 497, causing them to move along the surface of the guide rod 494 towards opposite sides, thus clamping the left side of the workpiece with the two clamping plates 497 on the left. This operation is then continued by starting the third motor on the right. The machine 492 clamps the right side of the workpiece, securing it in place with two clamping components 49. Then, the first motor 41 is started, driving the first gear 44 to rotate via its output shaft. The rotation of the first gear 44 drives the second gear 45, causing it to rotate between the inner walls of the two support plates 3 via a connecting shaft 42. The rotation of the connecting shaft 42 drives the two first sprockets 46 to rotate synchronously. The rotation of the two first sprockets 46, in turn, drives the two second sprockets 47 via two chains 48. These second sprockets 47 then drive the two rotating shafts 43 to rotate within the inner walls of the two support plates 3. 3. When rotating, the two clamping components 49 also rotate synchronously, causing the clamped workpiece to rotate and perform a flipping operation. Then, the vertical motor 77 is started, causing the vertical screw 78 at the output end to rotate. When the vertical screw 78 rotates, it drives the connecting table 79, which in turn drives the horizontal screw 75 and the horizontal motor 74. The horizontal screw 75 and the horizontal motor 74 move forward between the surfaces of the two vertical guide rods 71 ​​via the two first sliders 73, causing the connecting table 79 to drive the automatic welding device 2 forward (by controlling the start of the vertical motor 77 and reversing its output shaft, backward adjustment can be achieved). Then... Start the horizontal motor 74, which drives the horizontal screw 75 at the output end to rotate. The rotation of the horizontal screw 75 drives the connecting table 79, which in turn drives the vertical screw 78 and the vertical motor 77. The vertical screw 78 and the vertical motor 77 move to the left between the surfaces of the two horizontal guide rods 72 via the two second sliders 76. This causes the connecting table 79 to drive the automatic welding device 2 to move to the left (by controlling the start of the horizontal motor 74 and reversing its output shaft, the rightward adjustment can be achieved). After adjusting the automatic welding device 2 to the required welding position, finally start the automatic welding device 2 to perform automatic welding on the workpiece.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for the lower boom of a pantograph, comprising a base (1) and an automatic welding device (2), characterized in that: The top of the base (1) is fixedly connected to two support plates (3), and a clamping and flipping mechanism (4) is provided between the two support plates (3). The clamping and flipping mechanism (4) includes a first motor (41) fixedly connected to the right side of the right support plate (3), a connecting shaft (42) rotatably connected between the inner walls of the two support plates (3), and two rotating shafts (43) rotatably connected to the inner walls of the two support plates (3). A first gear (44) is fixedly connected to the surface of the output shaft of the first motor (41). A second gear (45) and two first sprockets (46) are fixedly connected to the surface of the connecting shaft (42). A second sprocket (47) is fixedly connected to the surface of each of the two rotating shafts (43). A chain (48) meshes between each of the two first sprockets (46) and the adjacent second sprocket (47). A clamping assembly (49) is provided at the opposite end of each of the two rotating shafts (43). The first gear (44) and the second gear (45) mesh with each other.

2. The welding fixture for the lower boom of a pantograph according to claim 1, characterized in that: The clamping assembly (49) on the left side includes a fixing groove (491) fixedly connected to the right end of the left rotating shaft (43). A third motor (492) is fixedly connected to the back of the fixing groove (491). A double-toothed screw (493) is rotatably connected to the inner wall of the fixing groove (491). A guide rod (494) is fixedly connected to the inner wall of the fixing groove (491). A third gear (495) is fixedly connected to the surface of the output shaft of the third motor (492). A fourth gear (496) is fixedly connected to the surface of the double-toothed screw (493). Two clamping plates (497) are slidably connected to the surface of the guide rod (494). The third gear (495) and the fourth gear (496) mesh with each other. Both clamping plates (497) are threadedly connected to the double-toothed screw (493).

3. The welding fixture for the lower boom of a pantograph according to claim 1, characterized in that: The base (1) is fixedly connected to four support columns (5), and a top frame (6) is fixedly connected between the top ends of the four support columns (5). A motion welding mechanism (7) is provided on the top frame (6).

4. The welding fixture for the lower boom of a pantograph according to claim 3, characterized in that: The motion welding mechanism (7) includes two vertical guide rods (71) and two horizontal guide rods (72) fixedly connected to the inner wall of the top frame (6). The surfaces of the two vertical guide rods (71) are slidably connected to a first slider (73). A horizontal motor (74) is fixedly connected to the right side of the first slider (73) on the left. A horizontal screw (75) is fixedly connected to the output end of the horizontal motor (74). The surfaces of the two horizontal guide rods (72) are slidably connected to a second slider (76). A vertical motor (77) is fixedly connected to the front of the second slider (76) at the rear. A vertical screw (78) is fixedly connected to the output end of the vertical motor (77). A connecting platform (79) is threaded between the surfaces of the horizontal screw (75) and the vertical screw (78). The automatic welding device (2) is fixedly connected to the bottom of the connecting platform (79).

5. The welding fixture for the lower boom of a pantograph according to claim 1, characterized in that: The base (1) has four support feet (8) fixedly connected to its bottom, and each of the four support feet (8) has a support base plate (9) fixedly connected to its bottom.

6. The welding fixture for the lower boom of a pantograph according to claim 2, characterized in that: The two clamping components (49) have the same structure and are symmetrically distributed on opposite ends of the two rotating shafts (43).

Images