A muffler assembly welding fixture with clamping positioning structure

Abstract

This utility model relates to the field of muffler processing technology, specifically to a muffler assembly welding fixture with a clamping and positioning structure. It includes a worktable, with two support plates fixedly connected to the top of the worktable. A fixed rotating mechanism is rotatably connected inside the support plates. The fixed rotating mechanism includes a second connecting column, a first fixing column fixedly connected to the outside of the second connecting column, a protective shell fixedly connected to the outside of the first fixing column, and a motor fixedly connected to the outside of the first fixing column. A gear is fixedly connected to the drive end of the motor. A transmission assembly is provided inside the protective shell, and a second gear is fixedly connected to the outside of the protective shell. This utility model achieves multi-station continuous welding by having the motor of the fixed rotating mechanism drive the gear set and the muffler to rotate, combined with the welding body sliding along a groove. This eliminates the need for frequent adjustments to the workpiece and welding torch positions, and strengthens the fixation of the muffler.

Description

Technical Field

[0001] This utility model relates to the field of muffler processing technology, and in particular to a muffler assembly welding fixture with a clamping and positioning structure. Background Technology

[0002] To meet the requirements for precise positioning and stable clamping during the welding of muffler assemblies, a clamping and positioning structure muffler assembly welding fixture was designed. This fixture is a tooling equipment that integrates multiple positioning components and clamping mechanisms. It can limit the position of components such as the muffler housing and pipes through specific positioning components, and then apply stable pressure with the help of clamping units to ensure that there is no displacement of each component during the welding process, thereby ensuring the quality of weld formation and dimensional accuracy.

[0003] A search revealed Chinese patent publication number CN217942405U, which discloses a robotic welding fixture for a secondary muffler assembly. The fixture includes a support frame and a second clamping mechanism. The inner cavity of the support frame is rotatably connected to a mounting frame via a rotating rod. A first clamping mechanism is fixedly connected to the middle of the mounting frame. The inner cavities of four sliding grooves are slidably connected to the two ends of two second clamping mechanisms. Both the first and second clamping mechanisms include a base plate, a bottom clamping seat, a clamping motor, a connecting rod, a top clamping sleeve, a hinge ear, a locking rod, and a tension spring. The top of the base plate is fixedly connected to the bottom clamping seat. A clamping motor is fixedly installed on one side of the top of the bottom clamping seat. Connecting rods are fixedly connected to both output ends of the clamping motor. The tops of the two connecting rods are respectively connected to the top clamping sleeve. This robotic welding fixture for a secondary muffler assembly provides more stable clamping, facilitates precise welding, and allows for adjustment of the welding position, replacing traditional manual adjustment and saving time and effort.

[0004] The aforementioned patent specification mentions that "the robot welding fixture for the auxiliary muffler assembly of this utility model makes the clamping more stable, facilitates precise welding, and allows for adjustment of the welding position, replacing traditional manual adjustment, saving time and effort." While the above can replace traditional manual adjustment and save time and effort, some muffler assembly welding fixtures have excessively large gaps between the positioning pins and the component holes, or uneven pressure applied by the clamping mechanism, which can cause slight displacement of the muffler components during the welding process, resulting in defects such as misalignment, undercut, and incomplete penetration of the weld, leading to unstable weld quality. Therefore, a muffler assembly welding fixture with a clamping and positioning structure is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a welding fixture for muffler assembly with a clamping and positioning structure, which solves the problem of unstable weld quality caused by unstable fixing of some muffler assembly welding fixtures.

[0006] To achieve the above objectives, this utility model provides a welding fixture for a muffler assembly with a clamping and positioning structure, including a worktable. A sliding groove is formed on the top of the worktable, and a control body is slidably connected inside the groove. Two support plates are fixedly connected to the top of the worktable. One support plate has a clamping mechanism inside, and the other support plate has a fixed rotating mechanism rotatably connected inside. An auxiliary mechanism is provided on the top of the worktable. The fixed rotating mechanism includes a second connecting column, which is rotatably connected to the outside of the support plate. A first fixing column is fixedly connected to the outside of the second connecting column. A protective shell is fixedly connected to the outside of the first fixing column. A motor is fixedly connected to the outside of the first fixing column, and a gear is fixedly connected to the drive end of the motor. A transmission assembly is provided inside the protective shell, and a second gear is fixedly connected to the outside of the protective shell.

[0007] The auxiliary mechanism includes a manual rotary wheel, which is rotatably connected to the outside of the worktable. A lead screw is fixedly connected to the outside of the manual rotary wheel, and the lead screw is rotatably connected to the inside of the worktable.

[0008] The outer surfaces of gear two and gear one are meshed together, and the outer surface of fixed column one is slidably connected to the outside of the support plate.

[0009] The transmission assembly includes a limiting shaft, the two outer ends of which are fixedly connected to the inside of the protective shell, and the outer side of the limiting shaft is rotatably connected to the inside of the second gear.

[0010] The gear two is externally fixedly connected to a fixing plate, and the fixing plate is externally fixedly connected to a fixing column two.

[0011] The lead screw is externally threaded to a connecting plate, and the connecting plate is internally rotatably connected to multiple rollers.

[0012] The clamping mechanism includes a rotating ring, which is rotatably connected to the outside of the support plate. A connecting column is fixedly connected to the inside of the rotating ring, and a telescopic rod is fixedly connected to the outside of the connecting column. The drive end of the telescopic rod is fixedly connected to a housing.

[0013] The outer shell has a cylinder fixedly connected inside, a transmission column fixedly connected to the drive end of the cylinder, a plurality of connecting rods rotatably connected to the outside of the transmission column, a plurality of connecting rods rotatably connected to the outside of the outer shell, an inner support plate rotatably connected to the outside of the connecting rods rotatably, and the connecting rods rotatably connected to the outside of the inner support plate.

[0014] 1. The present invention provides a welding fixture for a muffler assembly with a clamping and positioning structure. The motor of the fixed rotating mechanism drives the gear set and the muffler to rotate, and the welding body slides along the slide groove to realize the multi-station continuous welding function. It eliminates the need to frequently adjust the position of the workpiece and the welding gun, reduces the number of operation steps, significantly improves the welding efficiency and weld consistency, and strengthens the fixation of the muffler.

[0015] 2. The present invention provides a welding fixture for a muffler assembly with a clamping and positioning structure. The auxiliary mechanism's manual rotating wheel drives the lead screw to rotate, and the linkage connecting plate and roller move horizontally. In conjunction with the working of the clamping mechanism's telescopic rod, cylinder-driven connecting rod, and inner support plate, it achieves precise auxiliary positioning and inner support clamping of the muffler, avoiding the problems of manual positioning deviation and external clamping damage to the workpiece, and improving clamping accuracy and workpiece integrity. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0018] Figure 2 This is a structural schematic diagram of the connecting column of this utility model.

[0019] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0020] Figure 4 yes Figure 2 Enlarged view of point B in the middle.

[0021] Figure 5 This is a schematic diagram of the connecting plate of this utility model.

[0022] In the diagram: 1. Workbench; 2. Support plate; 3. Clamping mechanism; 31. Rotating ring; 32. Connecting column one; 33. Telescopic rod; 34. Outer shell; 35. Cylinder; 36. Connecting rod one; 37. Transmission column; 38. Inner support plate; 39. Connecting rod two; 4. Auxiliary mechanism; 41. Manual rotary wheel; 42. Lead screw; 43. Connecting plate; 44. Roller; 5. Control body; 6. Slide groove; 7. Fixed rotating mechanism; 71. Connecting column two; 72. Fixed column one; 73. Motor; 74. Gear one; 75. Gear two; 76. Protective shell; 77. Transmission assembly; 771. Fixed plate; 772. Fixed column two; 773. Limiting shaft. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0024] Please see Figures 1 to 3 This utility model provides a technical solution: a welding fixture for a muffler assembly with a clamping and positioning structure, including a worktable 1. A groove 6 is provided on the top of the worktable 1 to provide a guide track for the movement of a control body 5, ensuring that the welding body can be precisely adjusted along a preset path. The control body 5 is slidably connected inside the groove 6. The control body 5 is used to install welding components such as welding torches and can move along the groove 6 to adjust the welding position, realizing welding operations on different positions of the muffler. Two support plates 2 are fixedly connected to the top of the worktable 1. One of the support plates 2 has a clamping mechanism 3 inside, which is used to clamp the muffler... One end is clamped and fixed to prevent workpiece displacement during welding. The other support plate 2 is internally connected to a fixed rotation mechanism 7. The fixed rotation mechanism 7 is used to position the other end of the muffler and drive the workpiece to rotate, so as to complete the circumferential weld with the welding body. The support plate 2 is used to support the clamping mechanism 3 and the fixed rotation mechanism 7, providing a stable mounting carrier for the two mechanisms and ensuring coaxiality during clamping. The top of the worktable 1 is equipped with an auxiliary mechanism 4 to assist in supporting the muffler and fine-tuning the workpiece position to ensure that the workpiece axis is aligned with the clamping mechanism axis. The worktable 1 provides an installation platform for each mechanism to ensure the stability of the fixture when it is working.

[0025] The fixed rotation mechanism 7 includes a second connecting column 71, which is rotatably connected to the outside of the support plate 2. A first fixing column 72 is fixedly connected to the outside of the second connecting column 71. A protective shell 76 is fixedly connected to the outside of the first fixing column 72. A motor 73 is fixedly connected to the outside of the first fixing column 72. A gear 74 is fixedly connected to the drive end of the motor 73. A transmission assembly 77 is provided inside the protective shell 76. A second gear 75 is fixedly connected to the outside of the protective shell 76. The outside of the second gear 75 and the outside of the first gear 74 are meshed with each other. The outside of the first fixing column 72 is slidably connected to the outside of the support plate 2.

[0026] The transmission assembly 77 includes a limiting shaft 773, which limits the rotation trajectory of gear 2 75, ensuring that gear 2 75 rotates around the limiting shaft 773 and preventing gear 2 75 from deviating and affecting transmission accuracy. The two outer ends of the limiting shaft 773 are fixedly connected to the inside of the protective shell 76, and the outside of the limiting shaft 773 is rotatably connected to the inside of gear 2 75. A fixing plate 771 is fixedly connected to the outside of gear 2 75, which connects gear 2 75 and fixing column 2 772, transmitting the rotational force of gear 2 75 to fixing column 2 772, and increasing the contact area between fixing column 2 772 and the workpiece. Fixing column 2 772 is fixedly connected to the outside of fixing plate 771, and fixing column 2 772 directly contacts the other end of the muffler. By rotating and clamping or pressing the workpiece, the other end of the workpiece is fixed and rotated synchronously.

[0027] like Figure 2 , Figure 4 and Figure 5 As shown, the auxiliary mechanism 4 includes a manual rotary wheel 41, which is rotatably connected to the outside of the workbench 1. A lead screw 42 is fixedly connected to the outside of the manual rotary wheel 41, and the lead screw 42 is rotatably connected to the inside of the workbench 1. A connecting plate 43 is threadedly connected to the outside of the lead screw 42, and multiple rollers 44 are rotatably connected to the inside of the connecting plate 43.

[0028] The clamping mechanism 3 includes a rotating ring 31, which is rotatably connected to the inside of the support plate 2. A connecting column 32 is fixedly connected inside the rotating ring 31. The rotating ring 31, in conjunction with the fixed rotating mechanism 7, drives the workpiece to rotate synchronously, ensuring smooth rotation of the workpiece during welding. A telescopic rod 33 is fixedly connected to the outside of the connecting column 32. The telescopic rod 33 is an existing electric telescopic rod 33, which integrates a motor 73 and a lead screw 42 transmission structure. After being energized, the motor 73 drives the lead screw 42 to rotate, causing the piston at the drive end to smoothly extend and retract along the axial direction of the rod. The connecting column 32 is used to transmit the rotational motion of the rotating ring 31. A housing 34 is fixedly connected to the drive end of the telescopic rod 33. The housing 34 is used to install the cylinder 35 and the transmission column 37, providing installation space for the clamping action of the clamping mechanism 3. A cylinder 35 is fixedly connected inside the housing 4. The cylinder 35 is used to drive the transmission column 37 to extend and retract. The drive end of the cylinder 35 is fixedly connected to the transmission column 37. The transmission column 37 is used to drive the connecting rod 36 to unfold or retract, and is the core of the clamping action. Multiple connecting rods 36 are rotatably connected to the outside of the transmission column 37. The connecting rods 36 convert the linear motion of the transmission column 37 into the rotational motion of the connecting rod 39, and transmit the clamping force. Multiple connecting rods 39 are rotatably connected to the outside of the housing 34. The multiple connecting rods 39 work with the connecting rod 36 to drive the inner support plate 38 to open or retract. The inner support plate 38 is rotatably connected to the outside of the connecting rod 39. The inner support plate 38 is tightly fitted to the inner wall by opening, realizing the inner support clamping of one end of the workpiece, avoiding damage to the outer surface of the workpiece. The connecting rod 36 is rotatably connected to the outside of the inner support plate 38.

[0029] Working principle: The operator rotates the manual rotating wheel 41 of the auxiliary mechanism 4, which drives the fixed lead screw 42 to rotate in the worktable 1. Since the connecting plate 43 and the lead screw 42 are threadedly connected, the rotation of the lead screw 42 drives the connecting plate 43 to move along the length of the worktable 1. Multiple rollers 44 on the plate move synchronously until the rollers 44 contact the lower surface of the muffler assembly, thus completing the auxiliary positioning.

[0030] The telescopic rod 33 pushes the outer shell 34 toward the workpiece. After the outer shell 34 is fully inserted into the muffler cylinder port, the cylinder 35 starts and pushes the transmission column 37 to extend along the axis of the outer shell 34. The multiple sets of connecting rods 36 connected to the transmission column 37 are then extended, driving the connected connecting rods 39 to rotate synchronously. The inner support plate 38 at the end of the connecting rod 39 is pushed open toward the inner wall of the workpiece under the transmission action until it is tightly attached to the inner wall, realizing the inner support clamping of one end of the workpiece. The other end of the muffler is placed outside the fixed rotating mechanism 7. The motor 73 is started to drive the gear 74 to rotate. Because the gear 74 meshes with the gear 75, the gear 75 rotates around the limiting shaft 773, synchronously driving the fixing plate 771 and the fixing column 772 to rotate until the fixing column 772 clamps the surface of the muffler, completing the overall fixation.

[0031] According to the welding requirements of the muffler, the control body 5 slides along the top slide groove 6 of the workbench 1. After the welding gun is aligned with the first welding station, the motor 73 rotates continuously, driving the muffler and the clamping mechanism 3 to rotate synchronously, thereby completing the welding operation.

[0032] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A welding fixture for a muffler assembly with a clamping and positioning structure, comprising a worktable, characterized in that: The top of the workbench is provided with a sliding groove, and a control body is slidably connected inside the sliding groove. Two support plates are fixedly connected to the top of the workbench. One of the support plates is provided with a clamping mechanism inside, and the other support plate is rotatably connected with a fixed rotating mechanism inside. An auxiliary mechanism is provided on the top of the workbench. The fixed rotation mechanism includes a second connecting column, which is rotatably connected to the outside of the support plate. A first fixing column is fixedly connected to the outside of the second connecting column. A protective shell is fixedly connected to the outside of the first fixing column. A motor is fixedly connected to the outside of the first fixing column. A gear is fixedly connected to the drive end of the motor. A transmission assembly is provided inside the protective shell. A second gear is fixedly connected to the outside of the protective shell.

2. The muffler assembly welding fixture with clamping and positioning structure according to claim 1, characterized in that: The auxiliary mechanism includes a manual rotary wheel, which is rotatably connected to the outside of the worktable. A lead screw is fixedly connected to the outside of the manual rotary wheel, and the lead screw is rotatably connected to the inside of the worktable.

3. A muffler assembly welding fixture with a clamping and positioning structure according to claim 2, characterized in that: The outer surfaces of gear two and gear one are meshed together, and the outer surface of fixed column one is slidably connected to the outside of the support plate.

4. A muffler assembly welding fixture with a clamping and positioning structure according to claim 3, characterized in that: The transmission assembly includes a limiting shaft, the two outer ends of which are fixedly connected to the inside of the protective shell, and the outer side of the limiting shaft is rotatably connected to the inside of the second gear.

5. A muffler assembly welding fixture with a clamping and positioning structure according to claim 4, characterized in that: The gear two is externally fixedly connected to a fixing plate, and the fixing plate is externally fixedly connected to a fixing post two.

6. A muffler assembly welding fixture with a clamping and positioning structure according to claim 5, characterized in that: The lead screw is externally threaded to a connecting plate, and multiple rollers are rotatably connected inside the connecting plate.

7. A muffler assembly welding fixture with a clamping and positioning structure according to claim 1, characterized in that: The clamping mechanism includes a rotating ring, which is rotatably connected to the outside of the support plate. A connecting column is fixedly connected to the inside of the rotating ring, and a telescopic rod is fixedly connected to the outside of the connecting column. The drive end of the telescopic rod is fixedly connected to a housing.

8. A muffler assembly welding fixture with a clamping and positioning structure according to claim 7, characterized in that: A cylinder is fixedly connected inside the outer shell. A transmission column is fixedly connected to the driving end of the cylinder. Multiple connecting rods are rotatably connected to the outside of the transmission column. Multiple connecting rods are rotatably connected to the outside of the outer shell. An inner support plate is rotatably connected to the outside of the connecting rods. The outside of the connecting rods is rotatably connected to the outside of the inner support plate.

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