A shock absorber welding station

Abstract

The present application relates to the field of welding equipment, specifically to a shock absorber welding table, which is composed of a rotating positioning module of a positioning hanging ring and a moving positioning module of a positioning oil storage cylinder, and includes a rack and a lifting plate, wherein the lifting plate is slidingly connected to the rack, the rotating positioning module includes a fixed plate, a movable plate and a clamping plate, the fixed plate is installed on the lifting plate, the movable plate is hinged to the lifting plate, and the clamping plate is slidingly connected to the lifting plate, the moving positioning module includes a support plate and a guide plate, the support plate is installed on the rack, and the front and rear center surfaces of the support plate coincide with the front and rear center surfaces of the fixed plate, the guide plate is slidingly connected to the rack, and the two guide plates are respectively located on the front side and the rear side of the support plate. The present application positions the oil storage cylinder and the hanging ring respectively, adjusts the positioning height of the hanging ring according to the outer diameter of the oil storage cylinder, and aligns the oil storage cylinder with the hanging ring, so as to achieve the purpose of adapting to different specifications of shock absorbers by adjusting the welding table itself, thereby avoiding the replacement of positioning fixtures.

Description

Technical Field

[0001] This invention relates to the field of welding equipment, specifically to a shock absorber welding table. Background Technology

[0002] Shock absorbers are common components in various vehicles, used to buffer the impact between the chassis and axle, reducing the shocks experienced by the chassis during driving, thus protecting the chassis and improving the ride comfort. The working principle of a shock absorber is that the relative motion between the chassis and axle caused by vibration drives the piston of the shock absorber to move up and down. This causes the hydraulic oil in the shock absorber's reservoir to circulate repeatedly between the two chambers, converting the vibration energy into heat energy in the hydraulic oil. Therefore, the reservoir is the core structure of the shock absorber. During installation, both the piston end and the reservoir end need to be hinged to the chassis or axle; hence, a mounting ring is often welded to the end of the reservoir.

[0003] The oil reservoir is a hollow cylindrical object with one end open, while the hanging ring is a ring-shaped object. Therefore, in order to position the two before welding, the existing technology often uses two sets of vertically set wedge clamps to position the oil reservoir and the hanging ring respectively, and to make axial adjustments to the oil reservoir and the hanging ring to ensure that the two are aligned before welding.

[0004] Although the process of using wedge clamps to position the oil reservoir and the hanging ring is simple, in small-scale factories with small-batch production, the specifications of the shock absorbers vary. When the specifications of the oil reservoir and the hanging ring change, the specifications of the wedge clamps must also change accordingly. As a result, there are many types of wedge clamps, which increases the cost of the welding station. Moreover, each replacement of the wedge clamp is accompanied by experimental adjustments, making it difficult to guarantee the efficiency of replacement, thus affecting the working efficiency of the welding station.

[0005] To address this, a shock absorber welding station is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a shock absorber welding table that solves the problem of having to replace the positioning fixture on the welding table as the specifications of the shock absorber change. By positioning the oil reservoir and the hanging ring separately, and adjusting the positioning height of the hanging ring according to the outer diameter of the oil reservoir to align the oil reservoir and the hanging ring, the welding table can be adjusted by itself to adapt to shock absorbers of different specifications, thereby avoiding the need to replace the positioning fixture.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A shock absorber welding table comprises a rotating positioning module for a positioning hanging ring and a moving positioning module for a positioning oil reservoir. It includes a frame and a lifting plate, the lifting plate being slidably connected to the frame. The rotating positioning module includes a fixed plate, a moving plate, and a clamping plate. The fixed plate is mounted on the lifting plate, the moving plate is hinged to the lifting plate, and the two moving plates are respectively arranged on the left and right sides of the fixed plate. The clamping plate is slidably connected to the lifting plate, and the two clamping plates are respectively arranged on the front and rear sides of the fixed plate. The moving positioning module includes a support plate and a guide plate. The support plate is mounted on the frame, and the front and rear center surfaces of the support plate coincide with the front and rear center surfaces of the fixed plate. The guide plate is slidably connected to the frame, and the two guide plates are respectively located on the front and rear sides of the support plate.

[0009] The hanging ring and the oil reservoir are respectively placed on the upper side of the moving plate and the guide plate. The two moving plates open relative to each other, causing the hanging ring to fall onto the fixed plate. The hanging ring that falls onto the fixed plate is clamped by two clamping plates that move in close proximity. The two guide plates move away from each other, causing the oil reservoir to fall onto the support plate. The lifting plate is adjusted up and down so that the central axis of the hanging ring and the central axis of the oil reservoir are coplanar.

[0010] Preferably, the rotation positioning module further includes a first lead screw, a first motor, a slider, a rack and a gear. The first lead screw is rotatably connected to the lifting plate, the first motor is connected to the lower end of the first lead screw, the slider is mounted on the first lead screw, the two racks are mounted on the left and right sides of the slider and the two racks are mounted at the same height, and the gear is mounted on the moving plate and the two gears mesh with the two racks respectively.

[0011] In the above scheme, the moving plate has at least three opening states, each with a different function: 1) Support: In this state, the moving plate is above the fixed plate, and the included angle between the two moving plates is small, supporting the hanging ring and preventing the circumferential surface of the hanging ring from contacting the fixed plate below; 2) Limiting: Based on the support state, the included angle between the two moving plates gradually increases until the circumferential surface of the hanging ring contacts the fixed plate; 3) Retracting: Based on the limiting state, the included angle between the two moving plates increases again, causing the moving plate to rotate below the fixed plate, thereby preventing welding slag from adhering to the moving plate during the welding process, ensuring the smoothness of the moving plate surface, and thus ensuring the positioning accuracy of the moving plate for the hanging ring. Furthermore, in this scheme, a gear and rack module is used as the transmission mechanism for the moving plate. Compared to a linkage mechanism, this has the advantage of a larger rotation angle for the moving plate, resulting in smaller included angles between the moving plate above and below the fixed plate. This not only increases the range of the hanging ring supported and limited by the moving plate but also better prevents welding slag from contacting the surface of the moving plate.

[0012] Preferably, the rotation positioning module further includes a second motor and a second lead screw. The second motor is mounted on the lifting plate, and the second lead screw is rotatably connected to the lifting plate. One end of the second lead screw is connected to the output shaft of the second motor. The front and rear sections of the second lead screw are respectively provided with a thread with the same pitch and opposite direction of rotation. The two clamping plates respectively mesh with the threads of the front and rear sections of the second lead screw.

[0013] In the above scheme, the rotation of the second motor drives the two clamps on the second lead screw to move closer or further apart to clamp or release the hanging ring on the fixed plate.

[0014] Preferably, pressure sensors are installed on the adjacent sides of the two clamping plates and on the upper side of the fixed plate. The pressure signal of the pressure sensor on the fixed plate controls the first motor to stop and the second motor to start. The pressure sensor on the clamping plate controls the second motor to stop and the first motor to start when it receives a rated pressure signal.

[0015] In the above scheme, initially, the hanging ring is supported by the moving plate. Then, as the moving plate gradually opens (i.e., the angle between the two moving plates gradually increases), the hanging ring contacts the pressure sensor on the fixed plate. After that, the first motor stops and the second motor starts, so that the two clamping plates tighten inward, thereby clamping the hanging ring. When the clamping force of the clamping plates on the hanging ring reaches the rated value, the pressure sensor on the clamping plate sends a signal, the second motor stops, and the first motor starts. That is, the clamping plates stop clamping and maintain the rated clamping force, while the moving plate continues to rotate downward to complete the inward movement, thereby avoiding the adhesion of welding slag.

[0016] Preferably, the fixed plate is equipped with positioning pins, and the number of positioning pins is multiple, and the multiple positioning pins are symmetrically arranged about the left and right center planes of the fixed plate;

[0017] In the above scheme, after the hanging ring contacts the fixed plate and the clamping plate clamps the hanging ring, the positioning pin extends upward until it contacts the hanging ring's circumference, so as to achieve three-point positioning of the hanging ring by the positioning pin and the fixed plate, which serves as the positioning reference when welding the same batch of hanging rings, thereby avoiding frequent adjustments of the moving plate; when positioning hanging rings of different specifications, the extension height of the positioning pin is adjusted accordingly.

[0018] Preferably, the upper surface of the support plate is inclined, and the height of the upper surface of the support plate near the fixed plate is lower than the height of the side away from the fixed plate;

[0019] In the above scheme, the support plate and guide plate restrict the forward and backward movement and downward movement of the oil storage cylinder, while retaining the oil storage cylinder's freedom in the left and right directions. As a result, the oil storage cylinder is in close contact with the hanging ring under its own gravity, so as to ensure the uniformity and tightness of the weld.

[0020] Preferably, the mobile positioning module includes a third motor and a third lead screw. Both the third motor and the third lead screw are mounted on the frame, and one end of the third lead screw is connected to the output shaft of the third motor. The front and rear sections of the third lead screw are respectively provided with a thread with the same pitch and opposite direction of rotation. The two guide plates are respectively engaged with the threads of the front and rear sections of the third lead screw. The pressure sensor is mounted on the upper side of the support plate, and the pressure sensor on the support plate controls the third motor to stop rotating.

[0021] In the above scheme, the rotation of the third motor drives the two guide plates on the third lead screw to move closer or further apart. Initially, the two guide plates move closer together to support the oil reservoir and prevent the oil reservoir from contacting the support plate. As the two guide plates move further apart, the oil reservoir gradually falls until the oil reservoir contacts the pressure sensor on the support plate. The third motor then receives a stop command, thus forming a three-point positioning of the oil reservoir based on the positional relationship between the guide plates and the support plate.

[0022] Preferably, the angle between the upper surface of the support plate and the horizontal plane in the frontal view is denoted as α, the vertical distance from the right end point of the upper surface of the support plate to the left and right center planes of the fixed plate in the frontal view is denoted as a, and the vertical distance from the right end point of the upper surface of the support plate to the upper surface of the fixed plate in the frontal view is denoted as b. A pointer is installed on the lifting plate, and a scale bar is marked on the frame. When the pointer is facing the scale bar and the pointer points to the zero mark of the scale bar, b / a = tanα.

[0023] In the above scheme, the central axis of the oil reservoir cylinder and the central axis of the hanging ring are made coplanar by adjusting the lifting plate, so as to ensure that the two are aligned before welding.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. This invention provides a shock absorber welding table. By setting up a movable positioning module and a rotary positioning module that can respectively position the oil reservoir and the hanging ring, and making the rotary positioning module adjustable for lifting, the problem of the positioning fixture on the existing welding table needing to be frequently replaced as the specifications of the shock absorber change is solved. This invention can adapt to different specifications of shock absorbers through its own structural adjustment, avoiding the problems of increased cost and reduced efficiency caused by changing the fixture.

[0026] 2. This invention uses a liftable lifting plate to mount the rotating positioning module for positioning the hanging ring. When welding shock absorbers of different specifications, the positioning height of the hanging ring can be changed by adjusting the height of the lifting plate to match the oil storage cylinders of different outer diameters positioned by the moving positioning module. This ensures that the oil storage cylinders of different specifications and the hanging ring are coplanar on the central axis, guaranteeing the alignment accuracy before welding and providing a reliable guarantee for obtaining a uniform and tight weld.

[0027] 3. In this invention, after the moving plate has completed supporting and limiting the hanging ring, it can continue to rotate to the bottom of the fixed plate to "retract" and completely detach itself from the welding operation area. This not only achieves stable and precise clamping of the hanging ring, but also effectively avoids the contamination and damage of welding spatter to the moving plate through the retraction action, ensuring the smoothness of the moving plate surface and the positioning accuracy, thereby ensuring the long-term stable operation of the welding table. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall isometric structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 Enlarged diagram of section E in the middle;

[0030] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of section F in the middle;

[0031] Figure 4 This is a schematic diagram of the overall front view of the present invention;

[0032] Figure 5 This is a schematic diagram of the moving plate support state of the present invention;

[0033] Figure 6 This is a schematic diagram of the moving plate's limiting state according to the present invention;

[0034] Figure 7 This is a schematic diagram of the retracted state of the moving plate of the present invention;

[0035] Figure 8 This is a schematic diagram of the oil reservoir cylinder aligned with the hanging ring according to the present invention.

[0036] In the diagram: 1. Hanging ring; 2. Oil reservoir; 3. Rotation positioning module; 31. Fixed plate; 311. Positioning pin; 32. Moving plate; 33. Clamping plate; 34. First lead screw; 35. First motor; 36. Slider; 37. Rack; 38. Gear; 39. Second motor; 310. Second lead screw; 4. Moving positioning module; 41. Support plate; 42. Guide plate; 43. Third motor; 44. Third lead screw; 5. Frame; 51. Scale bar; 6. Lifting plate; 61. Pointer; 7. Pressure sensor. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1 to 8 The present invention provides a shock absorber welding station, the technical solution of which is as follows:

[0039] A shock absorber welding table comprises a rotation positioning module 3 for a positioning ring 1 and a movement positioning module 4 for a positioning oil reservoir 2. It includes a frame 5 and a lifting plate 6, with the lifting plate 6 slidably connected to the frame 5. In this configuration, the lifting plate 6 is slidably connected to the frame 5 via a slide rail module, and a lead screw passes through the lifting plate 6 and is rotatably connected to the frame 5. A motor drives a pair of bevel gears, thereby driving the lifting plate 6 to move up and down. The rotation positioning module 3 includes a fixed plate 31, a moving plate 32, and a clamping plate 33. The fixed plate 31 is fixedly installed on the lifting plate 6, which can be connected by bolts or welding. The moving plate 32 includes a rod and a blade. The rod of the moving plate 32 is hinged to the lifting plate 6. The blades 32 are respectively arranged on the left and right sides of the fixed plate 31, and are symmetrical about the left and right center planes of the fixed plate 31. The clamping plate 33 is slidably connected to the lifting plate 6. The two clamping plates 33 are respectively arranged on the front and rear sides of the fixed plate 31, and are symmetrical about the front and rear center planes of the fixed plate 31. The moving positioning module 4 includes a support plate 41 and a guide plate 42. The support plate 41 is installed on the frame 5, and the front and rear center planes of the support plate 41 coincide with the front and rear center planes of the fixed plate 31. The guide plate 42 is slidably connected to the frame 5. The two guide plates 42 are respectively located on the front and rear sides of the support plate 41, and are symmetrical about the front and rear center planes of the support plate 41.

[0040] The hanging ring 1 and the oil reservoir 2 are placed on the upper side of the moving plate 32 and the guide plate 42 respectively. The two moving plates 32 open relative to each other, causing the hanging ring 1 to fall onto the fixed plate 31. The hanging ring 1, which falls onto the fixed plate 31, is clamped by two clamping plates 33 that move in close proximity. The two guide plates 42 move away from each other, causing the oil reservoir 2 to fall onto the support plate 41. The lifting plate 6 is adjusted up and down so that the central axis of the hanging ring 1 and the central axis of the oil reservoir 2 are coplanar.

[0041] As one embodiment of the present invention, refer to Figure 1 and Figure 2 The rotation positioning module 3 also includes a first lead screw 34, a first motor 35, a slider 36, a rack 37, and a gear 38. The first lead screw 34 is rotatably connected to the lifting plate 6. The first motor 35 is connected to the lower end of the first lead screw 34. The slider 36 is mounted on the first lead screw 34, and a slide rail module is installed between the slider 36 and the lifting plate 6. Two racks 37 are installed on the left and right sides of the slider 36, and the installation height of the two racks 37 is the same. The gear 38 is fixedly mounted on the moving plate 32. The gear 38 can be assembled on the rod of the moving plate 32 by using a key connection, or the rod of the moving plate 32 can be manufactured in the form of a gear shaft, and the two gears 38 mesh with the two racks 37 respectively.

[0042] When a new specification of hanging ring 1 is determined on the welding table, initially, the slider 36 is located at the lower end of the first lead screw 34, making the included angle between the two moving plates 32 smaller. Then, the first motor 35 rotates, causing the slider 36 to drive the rack 37 to rise, thereby causing the two gears 38 to drive the two moving plates 32 to gradually open, so that the hanging ring 1 on the moving plate 32 falls to the fixed plate 31. When the hanging ring 1 is further clamped by the clamping plate 33, the gear 38 drives the moving plate 32 to continue to rotate, so that the moving plate 32 moves to below the fixed plate 31, thereby avoiding the adhesion of welding slag.

[0043] As one embodiment of the present invention, refer to Figure 2 and Figure 3 The rotation positioning module 3 also includes a second motor 39 and a second lead screw 310. The second motor 39 is mounted on the upper side of the lifting plate 6, and the second lead screw 310 is rotatably connected to the groove on the upper side of the lifting plate 6. One end of the second lead screw 310 is connected to the output shaft of the second motor 39. The front and rear sections of the second lead screw 310 are respectively provided with a thread with the same pitch and opposite direction of rotation. The lower side of the two clamping plates 33 is provided with a protrusion. The protrusion is inserted into the groove of the lifting plate 6, and the protrusion is provided with a threaded hole that mates with the second lead screw 310. Therefore, the protrusions on the two clamping plates 33 respectively mesh with the threads of the front and rear sections of the second lead screw 310, so that they move closer or further away from each other under the drive of the second motor 39, thereby clamping or loosening the hanging ring 1 on the fixed plate 31.

[0044] As one embodiment of the present invention, refer to Figures 2 to 7 Pressure sensors 7 are installed on the adjacent sides of the two clamping plates 33 and on the upper side of the fixed plate 31. The pressure signal of the pressure sensor 7 on the fixed plate 31 is sent to the controller, and the controller then issues a command to stop the first motor 35 and start the second motor 39. Similarly, the pressure sensor 7 on the clamping plate 33 sends a rated pressure signal to the controller, and the controller then issues a command to stop the second motor 39 and start the first motor 35. A positioning pin 311 is installed on the fixed plate 31. The positioning pin 311 is threadedly connected to the fixed plate 31. A nut is set on the part of the positioning pin 311 below the lifting plate 6, and the nut is tightly attached to the lower surface of the lifting plate 6, thereby completing the pre-tightening of the positioning pin 311 to prevent the positioning pin 311 from loosening during the positioning and welding process, thus ensuring the operation accuracy. There are multiple positioning pins 311. In this method, four are set, and the four positioning pins 311 are symmetrically arranged about the left and right center planes of the fixed plate 31.

[0045] Depending on the different positioning modes of the welding station for the hanging ring 1, the two pressure sensors 7 have the following two working processes:

[0046] 1) Positioning a new type of hanging ring 1: Initially, the hanging ring 1 is supported by the moving plate 32 and does not contact the fixed plate 31. Then, the moving plate 32 gradually opens under the action of the first motor 35 (i.e., the angle between the two moving plates 32 gradually increases) until the hanging ring 1 contacts the pressure sensor 7 on the fixed plate 31. The pressure sensor 7 on the fixed plate 31 issues a command to "stop the first motor 35 and start the second motor 39". Under the premise of maintaining the height of the hanging ring 1, the two clamping plates 33 tighten inward, thereby clamping the hanging ring 1. When the clamping force of the clamping plates 33 on the hanging ring 1 reaches the rated value, the clamping plates... The pressure sensor 7 on 33 sends a command to "stop the second motor 39 and start the first motor 35", that is, the clamping plate 33 stops clamping and maintains the rated clamping force, while the moving plate 32 continues to rotate downward to complete the inward action, thereby avoiding the adhesion of welding slag. The command sent by the pressure sensor 7 on the clamping plate 33 will be executed with a delay or require a secondary triggering by external conditions. During this period, the positioning pin 311 on the fixed plate 31 is manually adjusted so that the upper end of the positioning pin 311 contacts the hanging ring 1, and the nut on the positioning pin 311 is tightened to complete the pre-tightening of the positioning pin 311.

[0047] 2) Continuously positioning the same specification of hanging ring 1: Through the step of "positioning a new specification of hanging ring 1", the extension height of the positioning pin 311 is determined. After this process, the position of the moving plate 32 remains unchanged and is always located below the fixed plate 31 (e.g., Figure 7 As shown), during positioning, the hanging ring 1 is placed on the positioning pin 311, and the hanging ring 1 contacts the fixed plate 31. As a result, the pressure sensor 7 on the fixed plate 31 sends a signal, causing the second motor 39 to drive the two clamping plates 33 to clamp the hanging ring 1.

[0048] As one embodiment of the present invention, refer to Figure 1 , Figure 4 , Figure 7 and Figure 8 The upper surface of the support plate 41 is inclined, and the height of the side of the upper surface of the support plate 41 closer to the fixed plate 31 is lower than the height of the side away from the fixed plate 31, that is, the left side of the support plate 41 is higher than its own right side; the moving positioning module 4 includes a third motor 43 and a third lead screw 44. The third motor 43 and the third lead screw 44 are both mounted on the frame 5, and one end of the third lead screw 44 is connected to the output shaft of the third motor 43. The front and rear sections of the third lead screw 44 are respectively provided with a thread with the same pitch and opposite direction of rotation. The two guide plates 42 are respectively engaged with the threads of the front and rear sections of the third lead screw 44. The pressure sensor 7 is mounted on the upper side of the support plate 41, and the pressure sensor 7 on the support plate 41 controls the third motor 43 to stop rotating;

[0049] After the hanging ring 1 is positioned, the oil reservoir 2 is placed above the two guide plates 42. Due to the inclined design of the support plate 41, the oil reservoir 2 will press the positioned hanging ring 1 under its own weight (see reference). Figure 7At this time, the two guide plates 42 support the oil reservoir 2. As the third motor 43 rotates, the two guide plates 42 move away from each other, thereby causing the oil reservoir 2 to contact the pressure sensor 7 on the support plate 41 (refer to...). Figure 8 This causes the third motor 43 to stop. The above process only occurs when positioning the new specification oil reservoir 2. If the same specification oil reservoir 2 is continuously positioned, after the initial positioning, the oil reservoir 2 can be placed directly above the guide plate 42 to form a three-point positioning of the oil reservoir 2.

[0050] As one embodiment of the present invention, refer to Figure 2 , Figure 4 and Figure 8 The angle between the upper surface of the support plate 41 and the horizontal plane from the frontal view is denoted as α. The distance from the right end point of the upper surface of the support plate 41 to the left and right center planes of the fixed plate 31 from the frontal view is denoted as a. The distance from the right end point of the upper surface of the support plate 41 to the fixed plate 31 from the frontal view is denoted as b. A pointer 61 is installed on the lifting plate 6. A scale bar 51 is marked on the frame 5. When the pointer 61 is directly opposite the scale bar 51 and the pointer 61 points to the zero mark of the scale bar 51, b / a = tanα.

[0051] With the welding station in reset position, pointer 61 is aligned with the zero mark (refer to...). Figure 2 and Figure 4 At this point, from a direct viewing angle, the vertical distance from the right end point of the upper surface of the support plate 41 to the left and right center planes of the fixed plate 31 is denoted as 'a', and the vertical distance to the upper surface of the fixed plate 31 is denoted as 'b'. Figure 4 It can be seen that at this time, the extension line of the inclined surface of the support plate 41 passes through the center position of the upper surface of the fixed plate 31; before the positioning ring 1, the lifting plate 6 needs to be raised by a height h to ensure that the ring 1 and the oil reservoir 2 can be accurately aligned after positioning. The calculation result of h is as follows: Taking the oil reservoir 2 with an outer diameter of D and the ring 1 with an outer diameter of d as an example, refer to Figure 8 The intersection of the central axis of the oil reservoir 2 and the central axis of the hanging ring 1 is raised by a height H compared to the position where the inclined surface of the support plate 41 passes through the positioning upper surface in the welding table reset state. At this time, the included angles formed by the left and right center planes of the fixed plate 31 and the inclined surface of the support plate 41 are complementary to α. Therefore, taking the intersection of the central axis of the oil reservoir 2 and the central axis of the hanging ring 1 as the starting point, a perpendicular line is drawn to the inclined surface of the support plate 41 to form a... Figure 8The right triangle shown has a vertex angle of 90°-α and a side length of D / 2 opposite to the vertex angle, which forms sin(90°-α)=D / 2H. The variation is H=D / 2cosα. Since the lifting height H is the sum of half the outer diameter d of the hanging ring 1 and the lifting height h of the lifting plate 6, h=Hd / 2=D / 2cosα-d / 2. Preferably, in this method, α is taken as 60°, which simplifies the above formula to h=Dd / 2, thereby avoiding the error caused by complex decimal calculations and ensuring the accuracy of the adjustment of the lifting plate 6. In addition, the large angle of α allows the oil storage cylinder 2 and the hanging ring 1 to contact more closely, thereby making the welding more uniform and firm.

[0052] Working Principle: To achieve adaptive positioning and welding of shock absorbers of different specifications, and to ensure precise alignment of the oil reservoir 2 and the hanging ring 1 before welding, this invention sets up independent rotation positioning module 3 and movement positioning module 4, which work in conjunction with a lifting mechanism for coordinated adjustment. Specifically, the movement positioning module 4 performs three-point positioning of the oil reservoir 2, the rotation positioning module 3 clamps and positions the hanging ring 1, and the overall height of the rotation positioning module 3 is adjusted by lifting, ultimately making the central axis of the oil reservoir 2 of different specifications coplanar with the central axis of the hanging ring 1, thereby completing the pre-welding preparation work.

[0053] To achieve stable clamping and positioning of the hanging ring 1 and protect the positioning mechanism from welding damage, the specific workflow is as follows: First, the hanging ring 1 is placed on two supporting moving plates 32. The first motor 35 starts, driving the two moving plates 32 to gradually open through the first lead screw 34, slider 36, and gear 38 and rack 37 mechanism, causing the hanging ring 1 to fall and contact the pressure sensor 7 on the fixed plate 31. At this time, the first motor 35 stops, completing the height limit of the hanging ring 1. Then, the second motor 39 starts, driving the two clamping plates 33 to move towards each other through the second lead screw 310 with opposite rotation, clamping the hanging ring 1 onto the fixed plate 31. When the clamping force reaches the set value, the pressure sensor 7 on the clamping plate 33 sends a signal, causing the second motor 39 to stop. Finally, the first motor 35 starts again, driving the moving plates 32 to continue rotating downwards until they are completely retracted under the fixed plate 31, thereby completely avoiding the welding area, preventing welding slag from splashing and causing damage, and ensuring the long-term accuracy of the mechanism.

[0054] To achieve stable positioning of the oil reservoir 2 and ensure its tight fit with the hanging ring 1, the specific working method is as follows: After the hanging ring 1 is positioned, the oil reservoir 2 is placed on two opposing guide plates 42; the third motor 43 is started, driving the third lead screw 44 to move the two guide plates 42 away from each other, and the oil reservoir 2 falls smoothly until it contacts the support plate 41, forming a stable three-point positioning. The inclined support plate 41 cooperates with the guide plate 42 to restrict the forward and backward and up and down movement of the oil reservoir 2 while retaining its freedom in the left and right directions. Under its own gravity, the oil reservoir 2 can automatically slide and tightly abut against the positioned hanging ring 1, thereby eliminating the gap between the two and ensuring the tightness of the weld.

[0055] To ensure precise central axis alignment of the oil reservoirs 2 and hanging rings 1 with different outer diameters, the specific implementation is as follows: Before positioning the workpiece, the operator needs to pre-adjust the lifting height h of the lifting plate 6 according to the workpiece specifications. The pointer 61 on the lifting plate 6 cooperates with the scale bar 51 on the frame 5, providing a visual basis for height adjustment. This height h is determined based on a specific value calculated from geometric relationships. By adjusting the lifting plate 6 to this specific height, the positioning reference surface of the hanging ring 1 is preset to a precise height. In this way, after the oil reservoirs 2 and hanging rings 1 complete their respective positioning through the moving positioning module 4 and the rotating positioning module 3, their central axes can automatically achieve coplanarity, thereby ensuring the quality and consistency of subsequent welding.

[0056] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shock absorber welding table, comprising a rotation positioning module (3) of a positioning hanging ring (1) and a movement positioning module (4) of a positioning oil reservoir (2), including a frame (5), characterized in that: It also includes a lifting plate (6), which is slidably connected to the frame (5). The rotation positioning module (3) includes a fixed plate (31), a moving plate (32), and a clamping plate (33). The fixed plate (31) is fixedly connected to the lifting plate (6), the moving plate (32) is hinged to the lifting plate (6), and the two moving plates (32) are respectively arranged on the left and right sides of the fixed plate (31). The clamping plate (33) is slidably connected to the lifting plate (6). Two clamping plates (33) are respectively arranged on the front and rear sides of the fixed plate (31). The moving positioning module (4) includes a support plate (41) and a guide plate (42). The support plate (41) is fixedly connected to the frame (5), and the front and rear center surfaces of the support plate (41) coincide with the front and rear center surfaces of the fixed plate (31). The guide plate (42) is slidably connected to the frame (5), and the two guide plates (42) are respectively located on the front and rear sides of the support plate (41). The hanging ring (1) and the oil storage cylinder (2) are respectively placed on the upper side of the moving plate (32) and the guide plate (42). The two moving plates (32) open relative to each other, so that the hanging ring (1) falls to the fixed plate (31). The hanging ring (1) that falls to the fixed plate (31) is clamped and positioned by two clamping plates (33) that move in close proximity. The two guide plates (42) move away from each other, so that the oil storage cylinder (2) falls to the support plate (41) and is positioned at three points. The lifting plate (6) is adjusted up and down so that the central axis of the hanging ring (1) and the central axis of the oil storage cylinder (2) are coplanar. The rotation positioning module (3) further includes a first lead screw (34), a first motor (35), a slider (36), a rack (37), and a gear (38). The first lead screw (34) is rotatably connected to the lifting plate (6). The first motor (35) is connected to the lower end of the first lead screw (34). The slider (36) is mounted on the first lead screw (34). The two racks (37) are mounted on the left and right sides of the slider (36), and the two racks (37) are mounted at the same height. The gear (38) is mounted on the moving plate (32), and the two gears (38) mesh with the two racks (37) respectively. The rotation positioning module (3) also includes a second motor (39) and a second lead screw (310). The second motor (39) is mounted on the lifting plate (6), and the second lead screw (310) is rotatably connected to the lifting plate (6). One end of the second lead screw (310) is connected to the output shaft of the second motor (39). The front and rear sections of the second lead screw (310) are respectively provided with a thread with the same pitch and opposite direction. The two clamping plates (33) respectively mesh with the threads of the front and rear sections of the second lead screw (310).

2. The shock absorber welding table according to claim 1, characterized in that: Pressure sensors (7) are installed on the adjacent sides of the two clamping plates (33) and on the upper side of the fixed plate (31). The pressure signal of the pressure sensor (7) on the fixed plate (31) controls the first motor (35) to stop and the second motor (39) to start. The pressure sensor (7) on the clamping plate (33) controls the second motor (39) to stop and the first motor (35) to start under the rated pressure signal.

3. The shock absorber welding table according to claim 2, characterized in that: The fixed plate (31) is equipped with positioning pins (311), and there are multiple positioning pins (311), which are symmetrically arranged about the left and right center planes of the fixed plate (31).

4. A shock absorber welding table according to claim 2, characterized in that: The upper surface of the support plate (41) is inclined, and the height of the upper surface of the support plate (41) near the fixed plate (31) is lower than the height of the side away from the fixed plate (31).

5. A shock absorber welding table according to claim 4, characterized in that: The mobile positioning module (4) includes a third motor (43) and a third lead screw (44). The third motor (43) and the third lead screw (44) are both mounted on the frame (5), and one end of the third lead screw (44) is connected to the output shaft of the third motor (43). The front and rear sections of the third lead screw (44) are respectively provided with a thread with the same pitch and opposite direction. The two guide plates (42) are respectively engaged with the threads of the front and rear sections of the third lead screw (44). The pressure sensor (7) is mounted on the upper side of the support plate (41), and the pressure sensor (7) on the support plate (41) controls the third motor (43) to stop rotating.

6. A shock absorber welding table according to claim 4, characterized in that: The angle between the upper surface of the support plate (41) and the horizontal plane from the frontal view is denoted as α. The vertical distance from the right end point of the upper surface of the support plate (41) to the left and right center planes of the fixed plate (31) from the frontal view is denoted as a. The vertical distance from the right end point of the upper surface of the support plate (41) to the upper surface of the fixed plate (31) from the frontal view is denoted as b. A pointer (61) is installed on the lifting plate (6). A scale bar (51) is marked on the frame (5). The pointer (61) is facing the scale bar (51). When the pointer (61) points to the zero mark of the scale bar (51), b / a = tanα.

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