Connection structure and usage of fixture and universal rotary table

Abstract

This invention relates to the field of automotive manufacturing technology and discloses a connection structure between a fixture and a universal turntable. The structure includes a fixture and a universal turntable. Two mounting brackets are horizontally and symmetrically mounted in the middle of the fixture. A skid is mounted below the mounting bracket, and a micro-adjustment device for adjusting the skid position is also mounted on the mounting bracket. The universal turntable has mounting seats that match the mounting brackets. Several roller supports are provided on the horizontal side of the mounting seats. One vertical roller and one horizontal roller are mounted on the roller supports. Several fixture positioning pins are provided on the universal turntable, and fixture positioning bushings are provided on the fixture. This invention also discloses a method of using the connection structure between the fixture and the universal turntable. This invention's connection structure and method of using the fixture and universal turntable separates the turntable from the fixture. Different fixtures can be switched to accommodate the production of different car models, which is beneficial for line flexibility and is simple, reliable, low-cost, and has high positioning accuracy.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, specifically to a connection structure between a fixture and a universal turntable and its usage method. Background Technology

[0002] Currently, in automobile manufacturing, fixtures are generally set up as tetrahedrons and fixed to a turntable for production. While fixture switching is done manually through a cumbersome and complex process, it is time-consuming and inconvenient. Furthermore, the large size of the fixture results in high rotational inertia during production, making it difficult to guarantee production cycle time, leading to high drive energy consumption, low effective power, and increased wear due to misalignment between the rotational center of gravity and the turntable. Additionally, the lack of convenient access to water, electricity, and gas, coupled with the inability to expand automation in the future, highlights the obvious limitations of this technology.

[0003] Chinese Patent (Publication Date: February 22, 2019, Publication No.: CN109366046B) discloses a four-station rotary table continuous welding control system, including an HMI system, a PLC control system, a zero-point marking system, and a servo rotary table control system. The PLC control system and the HMI system are interconnected, as are the servo rotary table system and the PLC control system. The zero-point marking system is connected to the PLC control system and includes a zero-point marking mechanism. The servo rotary table control system includes a base plate, with multiple pads evenly spaced on the upper end of the base plate. A rotary table base is fixed to the upper end of each pad, and a rotary table rotation reducer is mounted on the upper end of the rotary table base. A bearing plate is fixed to the upper end of the rotary table reducer. This invention enables precise positioning and continuous rotation of multi-station rotary tables, saving working time, improving work efficiency, increasing space utilization, achieving multi-machine collaboration, facilitating operation, and providing high stability. However, this system not only cannot be shared or switched between different models to meet the requirements of flexible production line, but also has other shortcomings such as large equipment size, large rotational inertia during production, inability to guarantee production cycle, high drive energy consumption, and low effective power. It is also more prone to the situation where the rotation center of gravity is not concentric with the four-sided turntable equipment, which will aggravate the wear and tear of the equipment.

[0004] Chinese Patent (Publication Date: November 19, 2021, Publication No.: CN113664418A) discloses a turntable device suitable for rapid switching between multiple vehicle models, including a four-sided turntable device, a turntable frame, welding fixtures, a switching trolley, and a signal detection module. The turntable frame is fixed on the four-sided turntable device. The turntable frame is connected to the welding fixtures. The four-sided turntable device drives the turntable frame and welding fixtures to rotate. The welding fixtures are placed on the switching trolley for switching, positioning, and clamping. The signal detection module is set on the turntable frame to identify whether there is overtravel during the rotation of the turntable frame, identify the current body-in-white category, and upload the information to the PLC to call the corresponding program number. This invention is suitable for rapid switching between multiple vehicle models, and can meet the simultaneous online production of four vehicle models. Simultaneously, through the pneumatic-electric quick-connect device, welding fixture clamping unit, welding fixture positioning unit, and switching trolley on the turntable frame, the rapid switching function of the welding fixtures is realized, meeting the simultaneous online production of 4+N vehicle models. However, the switching method of this device is complex and requires manual assistance throughout the process. In particular, the technical structure of the device used for switching between water, electricity and gas is not clearly described. The roller group used is divided into X and Z directions, which is complex, difficult to debug and difficult to ensure accuracy. Furthermore, the turntable frame is set as a tetrahedron fixed on the four-sided turntable equipment, which is large in size, has a large moment of inertia during production, cannot guarantee the production cycle, has high drive energy consumption, low effective power and other shortcomings. It is also more likely to cause the center of gravity of rotation to be out of concentricity with the four-sided turntable equipment, which will aggravate the wear of the equipment. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the above-mentioned technologies by providing a connection structure and usage method for a fixture and a universal turntable. By separating the turntable from the fixture, different fixtures can be switched to accommodate the production of different vehicle models, which is beneficial to the flexibility of the production line. The invention is also simple, reliable, low in cost, and has high positioning accuracy.

[0006] To achieve the above objectives, the present invention designs a connection structure between a clamp and a universal turntable, comprising a clamp and a universal turntable. The clamp is A-shaped, with its front and rear surfaces as working surfaces and its left and right sides as non-working surfaces. Two mounting brackets, penetrating the two non-working surfaces, are horizontally and symmetrically mounted in the middle of the clamp. A skid is mounted below the mounting bracket in the length direction. A micro-adjustment device is also mounted on the mounting bracket to adjust the position of the skid in the width direction of the mounting bracket. The universal turntable is provided with two mounting seats, each corresponding to one of the mounting brackets. The mounting seats are shaped as follows: The mounting base is L-shaped with its opening facing outwards. Several roller supports are provided on the horizontal side of the mounting base. A vertical roller and a horizontal roller are mounted on each roller support via mounting pins. The vertical roller engages with the lower surface of the skid, and the horizontal roller engages with the inner surface of the skid. Several fixture positioning pins are provided on the universal turntable for positioning the fixture. These fixture positioning pins are mounted on the universal turntable via fixture positioning cylinders. The fixture is provided with fixture positioning bushings that engage with the fixture positioning pins, and these bushings are located on the working surface of the fixture.

[0007] Preferably, the mounting bracket is inverted L-shaped, with the vertical portion of the mounting bracket located on the outer side. The skid is mounted on the inner side of the mounting bracket by a vertical first bolt. The mounting bracket has a first through hole for the first bolt to pass through, and the inner diameter of the first through hole is larger than the outer diameter of the first bolt. The micro-adjustment device includes an adjusting clamping block mounted on the vertical portion of the mounting bracket by a second bolt. The adjusting clamping block is located between the skid and the vertical portion of the mounting bracket, and several shims are placed between the adjusting clamping block and the skid.

[0008] Preferably, the skid is a cuboid with a guide bevel at its end.

[0009] Preferably, the lower part of one non-working surface of the fixture is provided with an upper part of an electrical signal connection unit, and the universal turntable is provided with a lower part of an electrical signal connection unit corresponding to the upper part of the electrical signal connection unit. The lower part of the electrical signal connection unit is mounted on the universal turntable through an electrical signal switching cylinder.

[0010] The upper part of the electrical signal connection unit includes two horizontal float seats mounted on the clamp, a floating block sandwiched between the two float seats, the end of the floating block extending out of the float seat, an electrical signal docking socket mounted on the end of the floating block, a second through hole also provided on the end of the floating block, at least two electrical signal bushings provided on the inner wall of the second through hole, sealing felt encapsulated on the edges of the two float seats, the floating block having a third through hole, and a fourth through hole corresponding to the third through hole on the float seat, the floating block being mounted on the float seat by a third bolt passing through the third through hole and the fourth through hole, and the inner diameter of the third through hole being larger than the outer diameter of the third bolt;

[0011] The lower part of the electrical signal connection unit includes an electrical signal positioning pin and an electrical signal docking plug installed on the electrical signal switching cylinder. The electrical signal positioning pin matches the second through hole, and the electrical signal docking plug matches the electrical signal docking socket. The upper part of the electrical signal positioning pin is conical, and its top is higher than the electrical signal docking plug.

[0012] Preferably, a plurality of ball bearings are provided between the floating block and the floating block seat.

[0013] Preferably, the lower part of the other non-working surface of the fixture is provided with an upper part of a fluid connection unit, and the universal turntable is provided with a lower part of a fluid connection unit corresponding to the upper part of the fluid connection unit. The lower part of the fluid connection unit is mounted on the universal turntable by a fluid switching cylinder.

[0014] The upper part of the fluid connection unit includes an upper body mounted on the universal turntable. The upper body of the fluid connection unit has an upper outer shell, which is L-shaped. The horizontal edge of the upper outer shell faces the upper body of the fluid connection unit. An upper plunger is provided inside the upper outer shell. A first limiting groove is opened at the lower end of the upper plunger facing the upper outer shell. The horizontal edge of the upper outer shell abuts against the first limiting groove. A horizontal first limiting beam is provided at the upper part of the upper outer shell facing the upper plunger. A first spring is provided between the first limiting beam and the upper surface of the upper plunger. A gap is left between the upper plunger and the vertical edge of the upper outer shell. A gap is left between the first limiting beam and the upper body of the fluid connection unit. A first sealing ring is provided between the end of the horizontal edge of the upper outer shell and the upper wall of the first limiting groove of the upper plunger.

[0015] The lower part of the fluid connection unit includes a lower body mounted on the universal turntable. A lower outer shell, L-shaped, is provided on the lower body, with its horizontal edge facing the lower body. A core is located on the side of the lower body, between the horizontal edge of the lower shell and the lower body. The lower end of the core is sealed to the horizontal edge of the lower shell. The upper end of the core extends outward to form a second limiting beam, the length of which is less than the length of the lower end of the upper plunger. The outer casing also includes a lower plunger. A second spring is provided between the lower surface of the lower plunger and the horizontal edge of the lower outer casing. A sliding sealing ring is provided between the side wall of the lower plunger and the vertical edge of the lower outer casing. A second limiting groove is opened at the upper end of the lower plunger facing the second limiting beam. The second limiting beam abuts against the second limiting groove. A second sealing ring is provided between the second limiting groove and the second limiting beam. A third sealing ring is also provided on the upper surface of the lower plunger, which mates with the horizontal edge of the upper outer casing. A gap is left between the side wall of the lower plunger and the plunger core. A fluid passage hole is provided on the horizontal edge of the lower outer casing.

[0016] A method for using the connection structure between the clamp and the universal turntable involves using a micro-adjustment device to adjust the position of the skid in the width direction of the mounting base, so that the lower surface of the skid engages with the vertical roller, and the inner surface of the skid engages with the horizontal roller. When the vehicle model is cut in, the clamp to be replaced is pushed onto the roller on the universal turntable along the mounting base direction and stopped after being pushed to the designated position. Then, the clamp position cylinder extends, driving the clamp positioning pin to extend into the clamp positioning bushing. At this time, the clamp's up-down and left-right directions are accurately restricted by the roller, and its front-back direction is restricted by the clamp positioning pin, i.e., the clamp position is fixed. When the vehicle model is cut out, the clamp position cylinder retracts, driving the clamp positioning pin to disengage from the clamp positioning bushing. At this time, the clamp slides along the mounting base on the universal turntable, and the clamp can be pushed off the universal turntable.

[0017] Preferably, the mounting bracket is inverted L-shaped, with the vertical portion of the mounting bracket located on the outer side. The skid is mounted on the inner side of the mounting bracket by a vertical first bolt. The mounting bracket has a first through hole for the first bolt to pass through, and the inner diameter of the first through hole is larger than the outer diameter of the first bolt. The micro-adjustment device includes an adjusting clamping block mounted on the vertical portion of the mounting bracket by a second bolt. The adjusting clamping block is located between the skid and the vertical portion of the mounting bracket. Several shims are placed between the adjusting clamping block and the skid. In use, the position of the skid in the width direction of the mounting bracket is adjusted by adjusting the second bolt and thus adjusting the number of shims.

[0018] Preferably, the lower part of one non-working surface of the fixture is provided with an upper part of an electrical signal connection unit, and the universal turntable is provided with a lower part of an electrical signal connection unit corresponding to the upper part of the electrical signal connection unit. The lower part of the electrical signal connection unit is mounted on the universal turntable through an electrical signal switching cylinder.

[0019] The upper part of the electrical signal connection unit includes two horizontal float seats mounted on the clamp, a floating block sandwiched between the two float seats, the end of the floating block extending out of the float seat, an electrical signal docking socket mounted on the end of the floating block, a second through hole also provided on the end of the floating block, at least two electrical signal bushings provided on the inner wall of the second through hole, sealing felt encapsulated on the edges of the two float seats, the floating block having a third through hole, and a fourth through hole corresponding to the third through hole on the float seat, the floating block being mounted on the float seat by a third bolt passing through the third through hole and the fourth through hole, and the inner diameter of the third through hole being larger than the outer diameter of the third bolt;

[0020] The lower part of the electrical signal connection unit includes an electrical signal docking plug installed on the electrical signal switching cylinder and at least two electrical signal positioning pins. The electrical signal positioning pins are respectively matched with the electrical signal bushings, and the electrical signal docking plug is matched with the electrical signal docking socket. The upper part of the electrical signal positioning pin is conical, and its top is higher than the electrical signal docking plug.

[0021] When the vehicle body engages, the electrical signal switching cylinder extends, causing the electrical signal positioning pin and the electrical signal docking plug to rise. The electrical signal positioning pin first contacts the electrical signal bushing. If there is a deviation in the upper part of the electrical signal connection unit, when the electrical signal positioning pin extends into the electrical signal bushing, it will cause the floating block to move until the electrical signal positioning pin enters the electrical signal bushing. At this time, the electrical signal docking socket and the electrical signal docking plug are aligned. The electrical signal switching cylinder continues to rise, and the electrical signal docking plug is inserted into the electrical signal docking socket, at which point the electrical connection is established.

[0022] When the vehicle model is cut off, the electrical signal switching cylinder retracts, causing the electrical signal positioning pin and the electrical signal docking plug to disengage from the electrical signal bushing and the electrical signal docking socket, respectively, thus cutting off the electrical connection.

[0023] Preferably, the lower part of the other non-working surface of the fixture is provided with an upper part of a fluid connection unit, and the universal turntable is provided with a lower part of a fluid connection unit corresponding to the upper part of the fluid connection unit. The lower part of the fluid connection unit is mounted on the universal turntable by a fluid switching cylinder.

[0024] The upper part of the fluid connection unit includes an upper body mounted on the universal turntable. The upper body of the fluid connection unit has an upper outer shell, which is L-shaped. The horizontal edge of the upper outer shell faces the upper body of the fluid connection unit. An upper plunger is provided inside the upper outer shell. A first limiting groove is opened at the lower end of the upper plunger facing the upper outer shell. The horizontal edge of the upper outer shell abuts against the first limiting groove. A horizontal first limiting beam is provided at the upper part of the upper outer shell facing the upper plunger. A first spring is provided between the first limiting beam and the upper surface of the upper plunger. A gap is left between the upper plunger and the vertical edge of the upper outer shell. A gap is left between the first limiting beam and the upper body of the fluid connection unit. A first sealing ring is provided between the end of the horizontal edge of the upper outer shell and the upper wall of the first limiting groove of the upper plunger.

[0025] The lower part of the fluid connection unit includes a lower body mounted on the universal turntable. A lower outer shell, L-shaped, is provided on the lower body, with its horizontal edge facing the lower body. A core is located on the side of the lower body, between the horizontal edge of the lower shell and the lower body. The lower end of the core is sealed to the horizontal edge of the lower shell. The upper end of the core extends outward to form a second limiting beam, the length of which is less than the length of the lower end of the upper plunger. The outer casing also includes a lower plunger. A second spring is provided between the lower surface of the lower plunger and the horizontal edge of the lower outer casing. A sliding sealing ring is provided between the side wall of the lower plunger and the vertical edge of the lower outer casing. A second limiting groove is opened at the upper end of the lower plunger facing the second limiting beam. The second limiting beam abuts against the second limiting groove. A second sealing ring is provided between the second limiting groove and the second limiting beam. A third sealing ring is also provided on the upper surface of the lower plunger, which mates with the horizontal edge of the upper outer casing. A gap is left between the side wall of the lower plunger and the core. A fluid passage is provided on the horizontal edge of the lower outer casing.

[0026] When the vehicle body engages, the fluid switching cylinder extends, causing the lower part of the fluid connection unit to rise and contact the upper plunger and upper outer shell of the fluid connection unit. The fluid switching cylinder rises further, and the third sealing ring contacts the transverse edge of the upper outer shell and is compressed to achieve a water-air seal. The lower plunger is stopped from rising by the transverse edge of the upper outer shell. The fluid switching cylinder rises further, and the lower outer shell and the core rise together. During the rise, the core disengages from the second sealing ring and the lower plunger, and lifts the upper plunger together, disengaging it from the transverse edge of the upper outer shell and the first sealing ring. The first spring is compressed. At this time, the fluid channel is opened, and the fluid flows through the fluid through-hole, the gap between the lower plunger and the core, the gap between the upper plunger and the vertical edge of the upper outer shell, the gap between the upper plunger and the first limiting beam, and the gap between the first limiting beam and the upper body of the fluid connection unit.

[0027] When the vehicle model is cut off, the fluid switching cylinder retracts, causing the lower part of the fluid connection unit to detach from the upper part of the fluid connection unit, and cutting off the fluid channel to stop water vapor from overflowing.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] 1. Separating the universal turntable from the fixtures allows for the production of different car models by switching between different fixtures, which improves the flexibility of the production line;

[0030] 2. The switching mechanism for the universal rotary table and fixture is simple, reliable, low-cost, and has high positioning accuracy;

[0031] 3. The upper and lower connections of the electrical signal connection unit have the ability to automatically align with minor errors, which can improve the service life of the electrical signal connection unit and ensure signal stability;

[0032] 4. The upper and lower parts of the fluid connection unit not only serve to connect the upper and lower channels, but also function as a switch. It automatically stops water when disconnected. This structure can ensure that no fluid overflows during connection and disconnection. Moreover, even if there is a small radial deviation, the structure itself can absorb it.

[0033] 5. Fixture switching and water, gas and electricity connection are convenient, quick and efficient, requiring no manual intervention and suitable for automation expansion. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the connection structure between the fixture and the universal turntable of the present invention;

[0035] Figure 2 This is a schematic diagram of the connection structure between the fixture and the universal turntable of the present invention from another perspective;

[0036] Figure 3 for Figure 1 Enlarged schematic diagram of the mounting bracket and mounting base;

[0037] Figure 4 for Figure 3 A schematic diagram showing the connection between the mounting bracket and the skid;

[0038] Figure 5 for Figure 1 Enlarged schematic diagram of the middle roller and roller support;

[0039] Figure 6 for Figure 1 A schematic diagram of the connection between the upper and lower parts of the electrical signal connection unit;

[0040] Figure 7 for Figure 6 AA section view;

[0041] Figure 8 for Figure 2 A schematic diagram of the connection between the upper and lower parts of the fluid connection unit;

[0042] Figure 9 for Figure 8 AA section view;

[0043] Figure 10 for Figure 8 A schematic diagram showing the connection between the upper and lower parts of the fluid connection unit.

[0044] The components in the diagram are labeled as follows:

[0045] 1. Fixture; 2. Universal turntable; 3. Working surface; 4. Non-working surface; 5. Mounting bracket; 6. Skid; 7. Micro-adjustment device; 8. Mounting base; 9. Roller bracket; 10. Mounting pin; 11. Roller; 12. Fluid through hole; 13. Fixture positioning pin; 14. Fixture position cylinder; 15. Fixture positioning bushing; 16. First bolt; 17. First through hole; 18. Second bolt; 19. Adjusting clamping block; 20. Upper part of electrical signal connection unit; 21. Lower part of electrical signal connection unit; 22. Electrical signal switching cylinder; 23. Float block seat; 24. Floating block; 25. Electrical signal docking socket; 26. Second through hole; 27. Electrical signal bushing; 28. Sealing felt; 29. ​​... 30. Three-way hole 31. Fourth through hole 31. Third bolt 32. Electrical signal positioning pin 33. Electrical signal docking plug 34. Ball bearing 35. Upper part of fluid connection unit 36. Lower part of fluid connection unit 37. Fluid switching cylinder 38. Upper body of fluid connection unit 39. Upper outer shell 40. Upper plunger 41. First limiting groove 42. First limiting beam 43. First spring 44. First sealing ring 45. Lower body of fluid connection unit 46. Lower outer shell 47. Core 48. Second limiting beam 49. Lower plunger 50. Second spring 51. Sliding sealing ring 52. Second limiting groove 53. Second sealing ring 54. Third sealing ring 55. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0047] like Figure 1 and Figure 2 As shown, a connection structure between a fixture and a universal rotary table includes a fixture 1 and a universal rotary table 2. The fixture 1 is A-shaped, with its front and rear surfaces 3 as working surfaces and its left and right sides as non-working surfaces 4. Two mounting brackets 5 are horizontally and symmetrically mounted in the middle of the fixture 1, penetrating the two non-working surfaces 4. A skid 6 is mounted below the mounting bracket 5 in the length direction. A micro-adjustment device 7 is also mounted on the mounting bracket 5 to adjust the position of the skid 6 in the width direction of the mounting bracket 5. The universal rotary table 2 has two mounting seats 8 that are respectively matched with the mounting brackets 5. The mounting seats 8 are L-shaped. With the opening facing outward, the horizontal side of the mounting base 8 is provided with several roller brackets 9. A vertical roller 11 and a horizontal roller 11 are mounted on the roller brackets 9 by mounting pins 10. The vertical roller 11 mates with the lower surface of the skid 6, and the horizontal roller 11 mates with the inner surface of the skid 6. The general-purpose turntable 2 is provided with several positioning pins 13 of the positioning fixtures 1. The positioning pins 13 are mounted on the general-purpose turntable 2 by the positioning cylinders 14. The fixtures 1 are provided with positioning bushings 15 that mate with the positioning pins 13. The positioning bushings 15 are located on the working surface 3 of the fixtures 1.

[0048] In this embodiment, the position of the skid 6 in the width direction of the mounting base 5 is adjusted using the micro-adjustment device 7, so that the lower surface of the skid 6 engages with the vertical roller 11 and the inner surface of the skid 6 engages with the horizontal roller 11. When the vehicle model is cut in, the clamp 1 to be replaced is pushed onto the roller 11 on the universal turntable 2 along the direction of the mounting base 8. After being pushed to the designated position, it stops. Then, the clamp position cylinder 14 extends and drives the clamp positioning pin 13 to extend into the clamp positioning bushing 15. At this time, the clamp 1 is accurately restricted in the up and down and left and right directions by the roller 11, and in the front and back directions by the clamp positioning pin 13. That is, the position of the clamp 1 is fixed. When the vehicle model is cut out, the clamp position cylinder 14 retracts and drives the clamp positioning pin 13 to disengage from the clamp positioning bushing 15. At this time, the clamp 1 slides along the mounting base 8 on the universal turntable 2, and the clamp 1 can be pushed off the universal turntable 2.

[0049] In addition, combined Figure 3 , Figure 4 and Figure 5As shown, the mounting bracket 5 is an inverted L-shape, with the vertical portion of the mounting bracket 5 located on the outer side. The slide 6 is mounted on the inner side of the mounting bracket 5 by a vertical first bolt 16. The mounting bracket 5 has a first through hole 17 for the first bolt 16 to pass through. The inner diameter of the first through hole 17 is larger than the outer diameter of the first bolt 16. The micro-adjustment device 7 includes an adjusting clamping block 19 mounted on the vertical portion of the mounting bracket 5 by a second bolt 18. The adjusting clamping block 19 is located between the slide 6 and the vertical portion of the mounting bracket 5. Several shims 20 are placed between the adjusting clamping block 19 and the slide 6. In use, the position of the slide 6 in the width direction of the mounting bracket 5 is adjusted by adjusting the second bolt 18 and thus adjusting the number of shims 20.

[0050] Among them, the skid 6 is a cuboid with a guide bevel at its end for sliding.

[0051] like Figure 1 , Figure 6 and Figure 7 As shown, an upper part 21 of an electrical signal connection unit is provided on the lower part of a non-working surface 4 of the fixture 1, and a lower part 22 of an electrical signal connection unit corresponding to the upper part 21 of the electrical signal connection unit is provided on the universal turntable 2. The lower part 22 of the electrical signal connection unit is installed on the universal turntable 2 through an electrical signal switching cylinder 23.

[0052] The upper part 21 of the electrical signal connection unit includes two horizontal float seats 24 disposed on the clamp 1. A floating block 25 is sandwiched between the two float seats 24. The end of the floating block 25 extends out of the float seat 24. An electrical signal docking socket 26 is installed on the end of the floating block 25. A second through hole 27 is also provided on the end of the floating block 25. At least two electrical signal bushings 28 are provided on the inner wall of the second through hole 27. The edges of the two float seats 24 are sealed with sealing felt 29. The floating block 25 is provided with a third through hole 30. A fourth through hole 31 corresponding to the third through hole 30 is provided on the float seat 24. The floating block 25 is installed on the float seat 24 by passing through the third through hole 30 and the fourth through hole 31 with a third bolt 32. The inner diameter of the third through hole 30 is larger than the outer diameter of the third bolt 32.

[0053] The lower part 22 of the electrical signal connection unit includes an electrical signal docking plug 34 installed in the electrical signal switching cylinder 23 and at least two electrical signal positioning pins 33. The electrical signal positioning pins 33 are respectively matched with the electrical signal bushing 28, and the electrical signal docking plug 34 is matched with the electrical signal docking socket 26. The upper part of the electrical signal positioning pin 33 is conical, and its top is higher than the electrical signal docking plug 34.

[0054] When the vehicle engages, the electrical signal switching cylinder 23 extends, causing the electrical signal positioning pin 33 and the electrical signal docking plug 34 to rise. The electrical signal positioning pin 33 first contacts the electrical signal bushing 28. If there is a deviation in the upper part 21 of the electrical signal connection unit, when the electrical signal positioning pin 33 extends into the electrical signal bushing 28, it will drive the floating block 25 to move until the electrical signal positioning pin 33 enters the electrical signal bushing 28. At this time, the electrical signal docking socket 26 and the electrical signal docking plug 34 are aligned. The electrical signal switching cylinder 23 continues to rise, and the electrical signal docking plug 34 is inserted into the electrical signal docking socket 26. At this time, the electrical connection is established.

[0055] When the vehicle model is switched out, the electrical signal switching cylinder 23 retracts, causing the electrical signal positioning pin 33 and the electrical signal docking plug 34 to disengage from the electrical signal bushing 28 and the electrical signal docking socket 26 respectively, thus cutting off the electrical connection.

[0056] Among them, a number of balls 35 are provided between the floating block 25 and the floating block seat 24 to facilitate the movement of the floating block 25.

[0057] like Figure 2 , Figure 8 and Figure 9 As shown, the lower part of the other non-working surface 4 of the fixture 1 is provided with an upper part 36 of the fluid connection unit, and the universal turntable 2 is provided with a lower part 37 of the fluid connection unit corresponding to the upper part 36 of the fluid connection unit. The lower part 37 of the fluid connection unit is installed on the universal turntable 2 through a fluid switching cylinder 38.

[0058] The upper part 36 of the fluid connection unit includes an upper body 39 of the fluid connection unit mounted on the universal turntable 2. An upper shell 40 is provided on the upper body 39 of the fluid connection unit. The upper shell 40 is L-shaped. The horizontal edge of the upper shell 40 faces the upper body 39 of the fluid connection unit. An upper plunger 41 is provided inside the upper shell 40. A first limiting groove 42 is opened at the lower end of the upper plunger 41 facing the upper shell 40. The horizontal edge of the upper shell 40 abuts against the first limiting groove 42. A horizontal first limiting beam 43 is provided at the upper part of the upper shell 40 facing the upper plunger 41. A first spring 44 is provided between the first limiting beam 43 and the upper surface of the upper plunger 41. A gap is left between the upper plunger 41 and the vertical edge of the upper shell 40. A gap is left between the first limiting beam 43 and the upper body 39 of the fluid connection unit. A first sealing ring 45 is provided between the end of the horizontal edge of the upper shell 40 and the upper wall of the first limiting groove 42 of the upper plunger 41.

[0059] The lower part 37 of the fluid connection unit includes a lower body 46 of the fluid connection unit mounted on the universal turntable 2. A lower outer shell 47 is provided on the lower body 46. The lower outer shell 47 is L-shaped, with its horizontal edge facing the lower body 46. A core 48 is provided on the side of the lower body 46, located between the horizontal edge of the lower outer shell 47 and the lower body 46. The lower end of the core 48 is sealed to the horizontal edge of the lower outer shell 47, and the upper end of the core 48 extends outward to form a second limiting beam 49. The length of the second limiting beam 49 is less than the length of the lower end of the upper plunger 41. The interior of the lower outer shell 47... It is also provided with a lower plunger 50, a second spring 51 between the lower surface of the lower plunger 50 and the horizontal edge of the lower outer shell 47, a sliding sealing ring 52 between the side wall of the lower plunger 50 and the vertical edge of the lower outer shell 47, a second limiting groove 53 is opened at the upper end of the lower plunger 50 facing the second limiting beam 49, the second limiting beam 49 abuts against the second limiting groove 53, a second sealing ring 54 is provided between the second limiting groove 53 and the second limiting beam 49, a third sealing ring 55 is also provided on the upper surface of the lower plunger 50 to cooperate with the horizontal edge of the upper outer shell 40, a gap is left between the side wall of the lower plunger 50 and the core 48, and a fluid passage hole 12 is provided on the horizontal edge of the lower outer shell 47;

[0060] When the vehicle engages, the fluid switching cylinder 38 extends, causing the lower part 37 of the fluid connection unit to rise and contact the upper plunger 41 and the upper housing 40 of the upper part 36 of the fluid connection unit. The fluid switching cylinder 38 rises further, and the third sealing ring 55 contacts the transverse edge of the upper housing 40 and is compressed to achieve a water-air seal. The lower plunger 50 is stopped from rising by the transverse edge of the upper housing 40. The fluid switching cylinder 38 rises further, and the lower housing 47 rises together with the core 48. During the rise, the core 48 disengages from the second sealing ring 54 and the lower plunger 50, and lifts the upper plunger 41 together, disengaging it from the transverse edge of the upper housing 40 and the first sealing ring 45. The first spring 44 is compressed. Figure 10 As shown, the fluid channel is opened at this time, and the fluid flows through the fluid through hole 12, the gap between the lower plunger 50 and the core 48, the gap between the upper plunger 41 and the vertical edge of the upper outer shell 40, the gap between the upper plunger 41 and the first limiting beam 43, and the gap between the first limiting beam 43 and the upper body 39 of the fluid connection unit.

[0061] When the vehicle model is cut off, the fluid switching cylinder 38 retracts, causing the lower part 37 of the fluid connection unit to disengage from the upper part 36 of the fluid connection unit, and cutting off the fluid passage to stop water vapor from overflowing.

[0062] The present invention relates to a connection structure and usage method of a fixture and a universal turntable. The universal turntable 2 is separated from the fixture 1, allowing for the switching of different fixtures 1 to accommodate the production of different vehicle models, thus improving line flexibility. The switching mechanism between the universal turntable 2 and the fixture 1 is simple, reliable, low-cost, and highly accurate in positioning. The upper and lower connections of the electrical signal connection unit have the ability to automatically align with minor errors, improving the lifespan of the electrical signal connection unit and ensuring signal stability. The upper and lower fluid connection units not only connect the upper and lower channels but also function as switches, automatically stopping water flow upon disconnection. This structure ensures no fluid overflow during connection and disconnection, and even minor radial deviations are absorbed by the structure itself. Fixture switching and water, air, and electricity connections are convenient, fast, and efficient, requiring no manual intervention and suitable for automation expansion.

[0063] It should be noted that the above description of the technical solutions is exemplary, and this specification may be embodied in different forms and should not be construed as limiting it to the technical solutions set forth herein. Rather, providing these descriptions will ensure that the disclosure of this invention is thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solutions of this invention are defined only by the scope of the claims.

[0064] The aspects disclosed in this specification and claims are merely examples, and therefore, this specification and claims are not limited to the details shown. In the foregoing description, detailed descriptions of relevant known functions or configurations have been omitted where it would unnecessarily obscure the focus of this specification and claims.

[0065] Finally, it should be noted that the above description is a further detailed explanation of the invention in conjunction with specific embodiments. It should not be considered that the specific implementation of the invention is limited to these descriptions. For those skilled in the art, any simple substitutions made without departing from the concept of the invention should be considered within the scope of protection of this invention. The above embodiments are merely representative examples of the invention. Obviously, the invention is not limited to the above embodiments and many variations are possible. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the invention should be considered within the scope of protection of this invention.

Claims

1. A connection structure of a chuck and a universal turntable, comprising a chuck (1) and a universal turntable (2), characterized in that: The clamp (1) is A-shaped, with the front and rear sides of the clamp (1) being working surfaces (3) and the left and right sides being non-working surfaces (4). Two mounting brackets (5) are horizontally and symmetrically installed in the middle of the clamp (1), penetrating the two non-working surfaces (4) of the clamp (1). A skid (6) is installed below the mounting bracket (5) in the length direction. A micro-adjustment device (7) is also installed on the mounting bracket (5) to adjust the position of the skid (6) in the width direction of the mounting bracket (5). The universal turntable (2) is provided with two mounting seats (8) that are respectively matched with the mounting brackets (5). The mounting seats (8) are L-shaped, with the opening of the mounting seat (8) facing outward. Several... A roller bracket (9) is provided, on which a vertical roller (11) and a horizontal roller (11) are mounted by mounting pins (10). The vertical roller (11) engages with the lower surface of the skid (6), and the horizontal roller (11) engages with the inner surface of the skid (6). The universal turntable (2) is provided with a plurality of clamp positioning pins (13) for positioning the clamp (1). The clamp positioning pins (13) are mounted on the universal turntable (2) by clamp position cylinders (14). The clamp (1) is provided with clamp positioning bushings (15) that engage with the clamp positioning pins (13). The clamp positioning bushings (15) are located on the working surface (3) of the clamp (1).

2. The connection structure of the jig and the universal turntable according to claim 1, characterized by: The mounting bracket (5) is an inverted L-shape, with the vertical part of the mounting bracket (5) located on the outside. The skid (6) is mounted on the inner side of the mounting bracket (5) by a vertical first bolt (16). The mounting bracket (5) is provided with a first through hole (17) for the first bolt (16) to pass through. The inner diameter of the first through hole (17) is larger than the outer diameter of the first bolt (16). The micro-adjustment device (7) includes an adjustment clamping block (19) mounted on the vertical part of the mounting bracket (5) by a second bolt (18). The adjustment clamping block (19) is located between the skid (6) and the vertical part of the mounting bracket (5). Several shims (20) are placed between the adjustment clamping block (19) and the skid (6).

3. The connection structure of the fixture and the universal turntable according to claim 1, characterized in that: The skid (6) is a cuboid with guide bevels at its ends.

4. The connection structure of the jig and the universal turntable according to claim 1, wherein: The lower part of a non-working surface (4) of the fixture (1) is provided with an upper part (21) of an electrical signal connection unit, and the universal turntable (2) is provided with a lower part (22) of an electrical signal connection unit corresponding to the upper part (21) of the electrical signal connection unit. The lower part (22) of the electrical signal connection unit is mounted on the universal turntable (2) by an electrical signal switching cylinder (23). The upper part (21) of the electrical signal connection unit includes two horizontal float seats (24) provided on the clamp (1), a floating block (25) is sandwiched between the two float seats (24), the end of the floating block (25) extends out of the float seat (24), an electrical signal docking socket (26) is installed on the end of the floating block (25), and a second through hole (27) is also provided on the end of the floating block (25), and at least two electrical signal bushings are provided on the inner wall of the second through hole (27). (28) The edges of the two float seats (24) are sealed with sealing felt (29). The float block (25) is provided with a third through hole (30). The float seat (24) is provided with a fourth through hole (31) corresponding to the third through hole (30). The float block (25) is installed on the float seat (24) by passing through the third through hole (30) and the fourth through hole (31) with a third bolt (32). The inner diameter of the third through hole (30) is larger than the outer diameter of the third bolt (32). The lower part (22) of the electrical signal connection unit includes an electrical signal docking plug (34) installed in the electrical signal switching cylinder (23) and at least two electrical signal positioning pins (33). The electrical signal positioning pins (33) are respectively matched with the electrical signal bushing (28), and the electrical signal docking plug (34) is matched with the electrical signal docking socket (26). The upper part of the electrical signal positioning pin (33) is conical, and its top is higher than the electrical signal docking plug (34).

5. The connection of the fixture to the universal turntable according to claim 4, characterized in that: A plurality of balls (35) are provided between the floating block (25) and the floating block seat (24).

6. The connection structure between the fixture and the universal rotary table according to claim 1, characterized in that: The lower part of the other non-working surface (4) of the fixture (1) is provided with an upper part (36) of a fluid connection unit, and the universal turntable (2) is provided with a lower part (37) of a fluid connection unit corresponding to the upper part (36) of the fluid connection unit. The lower part (37) of the fluid connection unit is installed on the universal turntable (2) through a fluid switching cylinder (38). The upper part (36) of the fluid connection unit includes an upper body (39) of the fluid connection unit mounted on the universal turntable (2). An upper shell (40) is provided on the upper body (39). The upper shell (40) is L-shaped, with its horizontal edge facing the upper body (39). An upper plunger (41) is provided inside the upper shell (40). A first limiting groove (42) is opened at the lower end of the upper plunger (41) facing the upper shell (40). The horizontal edge of the upper shell (40) abuts against the first limiting groove (42). 2) A horizontal first limiting beam (43) is provided on the upper part of the upper outer shell (40) facing the upper plunger (41). A first spring (44) is provided between the first limiting beam (43) and the upper surface of the upper plunger (41). A gap is left between the upper plunger (41) and the vertical side of the upper outer shell (40). A gap is left between the first limiting beam (43) and the upper body (39) of the fluid connection unit. A first sealing ring (45) is provided between the horizontal end of the upper outer shell (40) and the upper wall of the first limiting groove (42) of the upper plunger (41). The lower part (37) of the fluid connection unit includes a lower body (46) of the fluid connection unit mounted on the universal turntable (2). A lower outer shell (47) is provided on the lower body (46). The lower outer shell (47) is L-shaped, with its horizontal edge facing the lower body (46). A core (48) is provided on the side of the lower body (46). The core (48) is located between the horizontal edge of the lower outer shell (47) and the lower body (46). The lower end of the core (48) is sealed to the horizontal edge of the lower outer shell (47). The upper end of the core (48) extends outward to form a second limiting beam (49). The length of the second limiting beam (49) is less than the length of the lower end of the upper plunger (41). The lower outer shell (47) also contains... A lower plunger (50) is provided. A second spring (51) is provided between the lower surface of the lower plunger (50) and the horizontal edge of the lower outer shell (47). A sliding sealing ring (52) is provided between the side wall of the lower plunger (50) and the vertical edge of the lower outer shell (47). A second limiting groove (53) is opened at the upper end of the lower plunger (50) facing the second limiting beam (49). The second limiting beam (49) abuts against the second limiting groove (53). A second sealing ring (54) is provided between the second limiting groove (53) and the second limiting beam (49). A third sealing ring (55) is also provided on the upper surface of the lower plunger (50) to cooperate with the horizontal edge of the upper outer shell (40). A gap is left between the side wall of the lower plunger (50) and the core (48). A fluid passage hole (12) is provided on the horizontal edge of the lower outer shell (47).

7. A method of using the connection structure between the fixture and the universal rotary table as described in claim 1, characterized in that: The position of the skid (6) in the width direction of the mounting bracket (5) is adjusted using the micro-adjustment device (7) so that the lower surface of the skid (6) engages with the vertical roller (11) and the inner surface of the skid (6) engages with the horizontal roller (11). When the vehicle model is cut in, the clamp (1) to be replaced is pushed onto the roller (11) on the universal turntable (2) along the direction of the mounting bracket (8). After being pushed to the designated position, it stops, and then the clamp position cylinder (14) extends to drive the movement. The clamp positioning pin (13) extends into the clamp positioning bushing (15). At this time, the clamp (1) is accurately restricted in the up and down and left and right directions by the roller (11), and in the front and back directions by the clamp positioning pin (13). That is, the position of the clamp (1) is fixed. When the vehicle model is cut out, the clamp position cylinder (14) retracts and drives the clamp positioning pin (13) to disengage from the clamp positioning bushing (15). At this time, the clamp (1) slides along the mounting base (8) on the universal turntable (2). The clamp (1) can be pushed off the universal turntable (2).

8. The method of using the connection structure between the fixture and the universal rotary table according to claim 7, characterized in that: The mounting bracket (5) is an inverted L-shape, with the vertical part of the mounting bracket (5) located on the outside. The skid (6) is mounted on the inner side of the mounting bracket (5) by a vertical first bolt (16). The mounting bracket (5) is provided with a first through hole (17) for the first bolt (16) to pass through. The inner diameter of the first through hole (17) is larger than the outer diameter of the first bolt (16). The micro-adjustment device (7) includes an adjustment clamping block (19) mounted on the vertical part of the mounting bracket (5) by a second bolt (18). The adjustment clamping block (19) is located between the skid (6) and the vertical part of the mounting bracket (5). Several shims (20) are placed between the adjustment clamping block (19) and the skid (6). In use, the position of the skid (6) in the width direction of the mounting bracket (5) is adjusted by adjusting the second bolt (18) and then adjusting the number of shims (20).

9. The method of using the connection structure between the fixture and the universal rotary table according to claim 7, characterized in that: The lower part of a non-working surface (4) of the fixture (1) is provided with an upper part (21) of an electrical signal connection unit, and the universal turntable (2) is provided with a lower part (22) of an electrical signal connection unit corresponding to the upper part (21) of the electrical signal connection unit. The lower part (22) of the electrical signal connection unit is mounted on the universal turntable (2) by an electrical signal switching cylinder (23). The upper part (21) of the electrical signal connection unit includes two horizontal float seats (24) provided on the clamp (1), a floating block (25) is sandwiched between the two float seats (24), the end of the floating block (25) extends out of the float seat (24), an electrical signal docking socket (26) is installed on the end of the floating block (25), and a second through hole (27) is also provided on the end of the floating block (25), and at least two electrical signal bushings are provided on the inner wall of the second through hole (27). (28) The edges of the two float seats (24) are sealed with sealing felt (29). The float block (25) is provided with a third through hole (30). The float seat (24) is provided with a fourth through hole (31) corresponding to the third through hole (30). The float block (25) is installed on the float seat (24) by passing through the third through hole (30) and the fourth through hole (31) with a third bolt (32). The inner diameter of the third through hole (30) is larger than the outer diameter of the third bolt (32). The lower part (22) of the electrical signal connection unit includes an electrical signal positioning pin (33) and an electrical signal docking plug (34) installed in the electrical signal switching cylinder (23). The electrical signal positioning pin (33) matches the second through hole (27), and the electrical signal docking plug (34) matches the electrical signal docking socket (26). The upper part of the electrical signal positioning pin (33) is conical, and its top is higher than the electrical signal docking plug (34). When the vehicle is engaged, the electrical signal switching cylinder (23) extends and drives the electrical signal positioning pin (33) and the electrical signal docking plug (34) to rise. The electrical signal positioning pin (33) first contacts the electrical signal bushing (28). If there is a deviation in the upper part (21) of the electrical signal connection unit, when the electrical signal positioning pin (33) extends into the electrical signal bushing (28), it will drive the floating block (25) to move until the electrical signal positioning pin (33) enters the electrical signal bushing (28). At this time, the electrical signal docking socket (26) and the electrical signal docking plug (34) are aligned. The electrical signal switching cylinder (23) continues to rise, and the electrical signal docking plug (34) is inserted into the electrical signal docking socket (26). At this time, the electrical connection is established. When the vehicle model is cut off, the electrical signal switching cylinder (23) retracts, causing the electrical signal positioning pin (33) and the electrical signal docking plug (34) to disengage from the electrical signal bushing (28) and the electrical signal docking socket (26) respectively, thus cutting off the electrical circuit.

10. The method of using the connection structure between the fixture and the universal rotary table according to claim 7, characterized in that: The lower part of the other non-working surface (4) of the fixture (1) is provided with an upper part (36) of a fluid connection unit, and the universal turntable (2) is provided with a lower part (37) of a fluid connection unit corresponding to the upper part (36) of the fluid connection unit. The lower part (37) of the fluid connection unit is installed on the universal turntable (2) through a fluid switching cylinder (38). The upper part (36) of the fluid connection unit includes an upper body (39) of the fluid connection unit mounted on the universal turntable (2). An upper shell (40) is provided on the upper body (39). The upper shell (40) is L-shaped, with its horizontal edge facing the upper body (39). An upper plunger (41) is provided inside the upper shell (40). A first limiting groove (42) is opened at the lower end of the upper plunger (41) facing the upper shell (40). The horizontal edge of the upper shell (40) abuts against the first limiting groove (42). 2) A horizontal first limiting beam (43) is provided on the upper part of the upper outer shell (40) facing the upper plunger (41). A first spring (44) is provided between the first limiting beam (43) and the upper surface of the upper plunger (41). A gap is left between the upper plunger (41) and the vertical side of the upper outer shell (40). A gap is left between the first limiting beam (43) and the upper body (39) of the fluid connection unit. A first sealing ring (45) is provided between the horizontal end of the upper outer shell (40) and the upper wall of the first limiting groove (42) of the upper plunger (41). The lower part (37) of the fluid connection unit includes a lower body (46) of the fluid connection unit mounted on the universal turntable (2). A lower outer shell (47) is provided on the lower body (46). The lower outer shell (47) is L-shaped, with its horizontal edge facing the lower body (46). A core (48) is provided on the side of the lower body (46). The core (48) is located between the horizontal edge of the lower outer shell (47) and the lower body (46). The lower end of the core (48) is sealed to the horizontal edge of the lower outer shell (47). The upper end of the core (48) extends outward to form a second limiting beam (49). The length of the second limiting beam (49) is less than the length of the lower end of the upper plunger (41). The lower outer shell (47) also contains... A lower plunger (50) is provided. A second spring (51) is provided between the lower surface of the lower plunger (50) and the horizontal edge of the lower outer shell (47). A sliding sealing ring (52) is provided between the side wall of the lower plunger (50) and the vertical edge of the lower outer shell (47). A second limiting groove (53) is opened at the upper end of the lower plunger (50) facing the second limiting beam (49). The second limiting beam (49) abuts against the second limiting groove (53). A second sealing ring (54) is provided between the second limiting groove (53) and the second limiting beam (49). A third sealing ring (55) is also provided on the upper surface of the lower plunger (50) to cooperate with the horizontal edge of the upper outer shell (40). A gap is left between the side wall of the lower plunger (50) and the core (48). A fluid passage hole (12) is provided on the horizontal edge of the lower outer shell (47). When the vehicle body engages, the fluid switching cylinder (38) extends, causing the lower part (37) of the fluid connection unit to rise and contact the upper plunger (41) and upper housing (40) of the upper part (36) of the fluid connection unit. The fluid switching cylinder (38) rises further, and the third sealing ring (55) contacts the transverse edge of the upper housing (40) and is compressed to perform a water-air seal. The lower plunger (50) is stopped from rising by the transverse edge of the upper housing (40). The fluid switching cylinder (38) rises further, and the lower housing (47) rises together with the core (48). During the rise of the core (48), it contacts the upper plunger (41) and upper housing (40) of the fluid connection unit. The two sealing rings (54) and the lower plunger (50) disengage, and together with the upper plunger (41), they lift up and disengage from the horizontal edge of the upper outer shell (40) and the first sealing ring (45), and the first spring (44) is compressed; at this time, the fluid channel is opened, and the fluid flows through the fluid through hole (12), the gap between the lower plunger (50) and the core (48), the gap between the upper plunger (41) and the vertical edge of the upper outer shell (40), the gap between the upper plunger (41) and the first limiting beam (43), and the gap between the first limiting beam (43) and the upper body (39) of the fluid connection unit; When the vehicle model is cut off, the fluid switching cylinder (38) retracts, causing the lower part (37) of the fluid connection unit to detach from the upper part (36) of the fluid connection unit, and cutting off the fluid channel to stop water vapor from overflowing.

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