Self-adaptive structure of airtight tooling

Abstract

This utility model relates to the field of automotive oil can airtight fixture technology, specifically to an airtight fixture self-adaptive structure, including a worktable. A base for placing an oil can is fixed to the top of the worktable, with the lower front end of the oil can placed inside the base. A first clamping device for clamping the left and right outer walls of the front end of the oil can is installed at the front end of the worktable. A protruding ring is formed at the bottom of the oil can. A positioning device is installed at the rear end of the top of the worktable, including a guide rod extending forward and backward and a second driving mechanism for driving the guide rod to move forward and backward. The front end of the guide rod extends into the base and passes through the protruding ring. An inclined bracket is fixed to the rear end of the worktable, and a second clamping device for clamping the filling port of the oil can is installed on the bracket. This utility model, by setting the first clamping device, the positioning device, and the second clamping device, achieves multi-point and multi-directional constraint on the oil can, making the oil can more securely fixed.

Description

Technical Field

[0001] This utility model relates to the field of automotive oil can airtight tooling technology, specifically an airtight tooling self-adaptive structure. Background Technology

[0002] Automotive oil reservoirs are typically assembled from multiple components through welding or other methods during manufacturing. Therefore, an airtightness test must be performed before the finished product leaves the factory to ensure its sealing performance meets usage requirements. During the airtightness test, specialized tooling is needed to secure the reservoir. The main functions of this tooling are twofold: firstly, to provide a stable base for the reservoir; and secondly, to reliably clamp the reservoir in place, preventing displacement due to external forces during the test. Existing tooling usually uses a base that conforms to the shape of the reservoir. The bottom of the reservoir is embedded in the base, and multiple clamping cylinders or jigs arranged on the sides apply pressure to the side walls of the reservoir, thus achieving overall fixation.

[0003] However, with the diversification of automotive component designs, some oil reservoirs with irregular shapes have emerged, especially those with filling ports that are not vertically positioned but at an angle. Existing fixtures for securing these reservoirs have significant shortcomings: due to the angled filling port, a tilted plug cylinder is required to seal it during testing. When the plug is pressed against the filling port along the tilt direction, a force component is generated that is different from the pressing direction. However, existing fixtures only press the sidewalls of the reservoir, lacking effective constraint on the filling port and the bottom of the reservoir. This allows the reservoir to easily undergo slight displacement or deflection under this force, preventing the plug from accurately aligning with the filling port for a seal, resulting in gas leakage and affecting the reliability and repeatability of the airtightness test results. Furthermore, the bottom of the reservoir is positioned solely by the base outline without additional pressing or limiting structures. When the plug is tilted and force is applied, the bottom of the reservoir may tilt or slide, further exacerbating the instability problem. Therefore, there is an urgent need to design an airtight fixture structure that can adapt to the tilted filling port of the oil can and achieve comprehensive and reliable fixation in order to improve the accuracy and stability of airtightness testing of irregular oil cans. Utility Model Content

[0004] In view of the above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a self-adaptive structure for airtight tooling.

[0005] The technical solution of this utility model is: an airtight tooling self-adaptive structure, including a workbench, a base for placing an oil can fixed on the top of the workbench, a support fixed on the top of the workbench behind the base, the lower front end of the oil can being placed in the base, and the rear end of the oil can abutting against the upper end of the support.

[0006] The front end of the workbench is equipped with a first clamping device for clamping the outer walls of the left and right sides of the front end of the oil can. The first clamping device includes a pair of clamping blocks and a first driving mechanism for driving the clamping blocks to move left and right.

[0007] The bottom of the oil can has a protruding ring protruding downwards, and a positioning device is installed at the rear end of the top of the workbench. The positioning device includes a guide rod extending forward and backward and a second drive mechanism for driving the guide rod to move forward and backward. The front end of the guide rod extends into the base and passes through the protruding ring.

[0008] The rear end of the workbench is fixed with an inclined bracket. The bracket is equipped with a second clamping device for clamping the filling port of the oil can. The second clamping device includes a pair of clamping plates and a third driving mechanism for driving the clamping plates to move left and right. The ends of the two clamping plates have semi-circular holes, and the two semi-circular holes are joined together to form a circular through hole that runs vertically through the top and bottom.

[0009] The upper end of the bracket is equipped with a pressure head and a fourth drive mechanism for driving the pressure head to move up and down. The pressure head extends into the through hole to block the injection port.

[0010] Furthermore, the first drive mechanism includes two lateral clamping cylinders, which are fixed on the left and right sides of the front end of the worktable, respectively, and a clamping block is fixedly connected to the piston rod end of each of the two lateral clamping cylinders.

[0011] Furthermore, each of the two clamping blocks has a fixing block at its upper end that matches the shape of the outer wall of the oil pot, and the front left and right sides of the base have a notch, through which the fixing block passes and presses against the outer wall of the oil pot.

[0012] Furthermore, the rear end of the base has an upward-facing recessed hole, and the rear side wall of the base has a first circular hole that runs through the front and rear, which communicates with the recessed hole. The convex ring has a second circular hole that runs through the front and rear, and the convex ring is accommodated in the recessed hole. The front end of the guide rod passes through the first and second circular holes. The second drive mechanism includes a front-and-rear-extending forward-pushing cylinder. A push plate is fixed to the piston rod end at the front end of the forward-pushing cylinder, and the rear end of the guide rod is fixedly connected to the front end of the push plate.

[0013] Furthermore, the third drive mechanism includes upper clamping cylinders fixed on the left and right sides of the lower end of the bracket, with the piston rod end of the upper clamping cylinders fixedly connected to the clamping plate.

[0014] Furthermore, pressure blocks are protruding on the inner walls of both semicircular holes, and the pressure blocks are used to contact the outer wall of the injection port.

[0015] Furthermore, the fourth drive mechanism includes a pressing cylinder fixed to the middle of the upper end of the bracket, with the piston rod end of the lower end of the pressing cylinder fixedly connected to the upper end of the pressing head, and the pressing head located above the through hole.

[0016] Furthermore, the bottom of the oil container has three downward-protruding outlets, the middle of the base has a first through hole that runs vertically through the three outlets, the front end of the workbench has a second through hole that runs vertically through the first through hole, a lifting cylinder is fixed at the bottom of the workbench, a lifting block is fixed at the piston rod end of the upper end of the lifting cylinder, three plugs are fixed at the top of the lifting block, the lifting block passes through the second through hole, and the three plugs are used to block the bottom of the three outlets.

[0017] Furthermore, a dotting cylinder is fixed to the right end of the workbench, and a dotting seat is fixed to the piston rod end of the left end of the dotting cylinder. An iron rod extending to the left and right is fixed to the upper end of the dotting seat, and the iron rod is located to the right of the oil can.

[0018] The beneficial effects of applying the self-adaptive structure of the airtight tooling provided by this utility model are: by setting the first clamping device, the positioning device, and the second clamping device, multi-point and multi-directional constraint of the oil can is achieved;

[0019] The first clamping device fixes the left and right sides of the oil can, constraining the oil can in the left and right directions and playing a basic fixing role;

[0020] The positioning device utilizes the protruding ring at the bottom of the oil can. Through the cooperation of the guide rod and the protruding ring at the bottom of the oil can, the bottom of the oil can can be effectively constrained, and the oil can can be constrained in the vertical direction to prevent it from tilting or sliding during the testing process.

[0021] The second clamping device clamps the injection port with a clamp plate with a semi-circular hole, and works with the pressure head driven by the fourth drive mechanism to seal it. This design can effectively fix the tilted injection port and ensure that the pressure head can accurately seal the injection port, effectively avoiding the force component problem caused by the tilt of the injection port. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is another overall structural schematic diagram of the present invention;

[0024] Figure 3 for Figure 1 A left-view diagram;

[0025] Figure 4 This is a schematic diagram of the structure of the base of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the oil can of this utility model;

[0027] Figure 6 This is a schematic diagram showing the connection between the workbench and the lifting cylinder, lifting block, and plug of this utility model.

[0028] Figure 7 This is a schematic diagram of the structure of the two clamps of this utility model.

[0029] The diagram shows: 1—Workbench, 1.1—Second through hole, 2—Base, 2.1—Notch, 2.2—Concave hole, 2.3—First round hole, 2.4—First through hole, 3—Support, 4—Clamping block, 41—Fixing block, 5—Oil can, 51—Protruding ring, 511—Second round hole, 52—Injection port, 53—Outlet port, 6—Guide rod, 7—Bracket, 8—Clamping plate, 81—Semi-circular hole, 811—Pressure block, 9—Through hole, 10—Pressure head, 11—Side clamping cylinder, 12—Front push cylinder, 13—Push plate, 14—Upper clamping cylinder, 15—Lower pressing cylinder, 16—Lifting cylinder, 17—Lifting block, 18—Plug, 19—Marking cylinder, 20—Marking seat, 21—Iron rod. Detailed Implementation

[0030] To provide a more intuitive and complete understanding of the technical solution of this utility model, the following non-limiting features are described in conjunction with the accompanying drawings:

[0031] like Figure 1 — Figure 7 As shown, the airtight tooling self-adaptive structure includes a workbench 1, a base 2 for placing an oil can 5 fixed on the top of the workbench 1, and a support 3 fixed on the top of the workbench 1 behind the base 2. The lower front end of the oil can 5 is placed inside the base 2 (the shape of the lower front end of the oil can 5 is adapted to the base 2), and the rear end of the oil can 5 abuts against the upper end of the support 3. A first clamping device for clamping the outer walls of the left and right sides of the front end of the oil can 5 is installed at the front end of the workbench 1. The first clamping device includes a pair of clamping blocks 4 and a first driving mechanism for driving the clamping blocks 4 to move left and right. A protruding ring 51 is provided downward at the bottom of the oil can 5. A positioning device is installed at the rear end of the top of the workbench 1. The positioning device includes... The worktable 1 includes a guide rod 6 extending forward and backward and a second drive mechanism for driving the guide rod 6 to move forward and backward. The front end of the guide rod 6 extends into the base 2 and passes through the protruding ring 51. The rear end of the worktable 1 is fixed with an inclined bracket 7. The bracket 7 is equipped with a second clamping device for clamping the filling port 52 of the oil can 5. The second clamping device includes a pair of clamping plates 8 and a third drive mechanism for driving the clamping plates 8 to move left and right. The ends of the two clamping plates 8 each have a semi-circular hole 81. The two semi-circular holes 81 are spliced ​​together to form a circular through hole 9 that runs vertically through the worktable. The upper end of the bracket 7 is equipped with a pressure head 10 and a fourth drive mechanism for driving the pressure head 10 to move up and down. The pressure head 10 extends into the through hole 9 and is used to block the filling port 52.

[0032] like Figure 5As shown, the rear end of the oil can 5 is raised upwards, and the raised part is relatively large. If only the base 2 supports the oil can 5, the oil can 5 will be unstable. Therefore, this utility model adds a support 3, and the rear end of the oil can 5 abuts against the upper end of the support 3, so that the oil can 5 is placed stably.

[0033] like Figure 1 , Figure 4 As shown, the first driving mechanism includes two lateral clamping cylinders 11, which are fixed to the left and right sides of the front end of the worktable 1, respectively. A clamping block 4 is fixedly connected to the piston rod end of each of the two lateral clamping cylinders 11. Each clamping block 4 has a fixing block 41 at its upper end, the shape of which matches the outer wall of the oil container 5. The front end of the base 2 has a notch 2.1 on both the left and right sides, through which the fixing block 41 passes and presses against the outer wall of the oil container 5. When the lateral clamping cylinders 11 are working, they can drive the clamping blocks 4 to move left and right, clamping the oil container 5 through the two fixing blocks 41. This symmetrical layout ensures a uniform distribution of clamping force, preventing the oil container 5 from deflecting due to unilateral force application, and further improving the clamping stability of the front end of the oil container 5.

[0034] like Figure 3 — Figure 5 As shown, the rear end of the base 2 has an upward-facing recessed hole 2.2, and the rear side wall of the base 2 has a through-hole 2.3. The first hole 2.3 communicates with the recessed hole 2.2. The convex ring 51 has a through-hole 511. The convex ring 51 is accommodated in the recessed hole 2.2. The front end of the guide rod 6 passes through the first hole 2.3 and the second hole 511. The second drive mechanism includes a forward-extending cylinder 12. A push plate 13 is fixed to the piston rod end at the front end of the forward-extending cylinder 12. The rear end of the guide rod 6 is fixedly connected to the front end of the push plate 13. The recessed hole 2.2 at the rear end of the base 2 accommodates the convex ring 51 at the bottom of the oil can 5, while the forward-extending guide rod 6 passes through the first hole 2.3 and the second hole 511, forming a "pin-hole fit". This structural combination can firmly lock the bottom of the oil can 5, restricting the vertical movement of the oil can 5 and eliminating the risk of the bottom of the oil can 5 tilting up.

[0035] like Figure 1 , Figure 7As shown, the third drive mechanism includes upper clamping cylinders 14 fixed to the left and right sides of the lower end of the bracket 7. The piston rod end of the upper clamping cylinder 14 is fixedly connected to the clamping plate 8. Pressure blocks 811 protrude from the inner walls of the two semi-circular holes 81, and the pressure blocks 811 are used to contact the outer wall of the injection port 52. It uses two upper clamping cylinders 14 distributed left and right, and the synchronous drive on both sides ensures the balance of clamping force on the left and right sides of the injection port 52. The two semi-circular holes 81 are spliced ​​to form a circular through hole 9 that runs vertically through the hole, so that the pressure head 10 can extend into the through hole 9 and block the injection port 52. The pressure blocks 811 protrude from the inner walls of the two semi-circular holes 81, optimizing the clamping of the injection port 52 by the clamping plate 8 from "surface contact" to local "reinforcing rib contact". This allows the clamping force to be applied more concentratedly to specific parts of the outer wall of the injection port 52, improving clamping reliability and ensuring that the injection port 52 is firmly held and not easily slipped.

[0036] like Figure 1 As shown, the fourth drive mechanism includes a pressure cylinder 15 fixed to the middle of the upper end of the bracket 7. The piston rod end of the lower end of the pressure cylinder 15 is fixedly connected to the upper end of the pressure head 10, which is located above the through hole 9. The pressure head 10 is cylindrical. In use, the pressure cylinder 15 can drive the pressure head 10 to move up and down. Because the bracket 7 is inclined, the pressure cylinder 15 fixed on the bracket 7 is also inclined, so the pressure head 10 can effectively block the inclined injection port 52.

[0037] like Figure 2 , Figure 4 — Figure 6 As shown, the bottom of the oil container 5 has three downward-protruding outlets 53. The middle of the base 2 has a first through hole 2.4 that runs vertically through the three outlets 53. The front end of the workbench 1 has a second through hole 1.1 that runs vertically through the first through hole 2.4 and is located below the first through hole 2.4. A lifting cylinder 16 is fixed to the bottom of the workbench 1. A lifting block 17 is fixed to the piston rod end of the upper end of the lifting cylinder 16. Three plugs 18 are fixed to the top of the lifting block 17. The lifting block 17 passes through the second through hole 1.1, and the three plugs 18 are used to block the bottom of the three outlets 53. By setting the lifting cylinder 16 to synchronously drive the three plugs 18 on the lifting block 17, a one-time, synchronous seal is achieved for the three outlets 53 at the bottom of the oil container 5. This design greatly improves the efficiency of bottom sealing and ensures the consistency of the action of each plug 18.

[0038] The liquid outlet 53 and the liquid inlet 52 can be opened or blocked. They are used for airtightness testing and are used in conjunction with a leak detector to test the amount of gas leakage inside the product to determine the quality of the product's airtightness.

[0039] like Figure 1As shown, a marking cylinder 19 is fixed to the right end of the workbench 1. A marking seat 20 is fixed to the piston rod end of the left end of the marking cylinder 19. A left-right extending iron rod 21 is fixed to the upper end of the marking seat 20. The iron rod 21 is located on the right side of the oil can 5. The marking cylinder 19 can control the iron rod 21 to move left and right. After the airtightness test is completed, the iron rod 21 is controlled to move to the left to mark the outer wall of the oil can 5.

[0040] In use, the oil can 5 is manually placed into the base 2. The first clamping device, the positioning device, and the second clamping device fix the oil can 5. Then, an airtightness test is performed. After the test, the iron rod 21 marks the outer wall of the oil can 5. Then, all parts are reset and the oil can 5 is manually removed.

[0041] The self-adaptive structure of the airtight tooling provided by this utility model achieves multi-point and multi-directional constraint on the oil can 5 by setting a first clamping device, a positioning device, and a second clamping device. The first clamping device fixes the left and right sides of the oil can 5, constraining the oil can 5 in the left and right directions, and plays a basic fixing role. The positioning device utilizes the convex ring 51 on the bottom of the oil can 5. Through the cooperation of the guide rod 6 and the convex ring 51 on the bottom of the oil can 5, it can effectively constrain the bottom of the oil can 5 and constrain the oil can 5 in the up and down directions, preventing it from tilting or sliding during the testing process. The second clamping device clamps the liquid injection port 52 through the clamping plate 8 with a semi-circular hole 81, and works with the pressure head 10 driven by the fourth drive mechanism to seal it. This design can effectively fix the tilted liquid injection port 52, ensuring that the pressure head 10 can accurately seal the liquid injection port 52, and effectively avoid the force component problem caused by the tilt of the liquid injection port 52.

[0042] Of course, the above are only preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any simple modifications and equivalent structural changes made based on the contents of the present utility model specification and drawings should also be included within the patent protection scope of the present utility model.

Claims

1. Airtight tooling self-adapting structure, comprising a workbench, a base for placing an oil can is fixed on the top of the workbench, characterized in that: A support is fixed on the top of the workbench behind the base. The lower front end of the oil can is placed inside the base, and the rear end of the oil can rests against the upper end of the support. The front end of the workbench is equipped with a first clamping device for clamping the outer walls of the left and right sides of the front end of the oil can. The first clamping device includes a pair of clamping blocks and a first driving mechanism for driving the clamping blocks to move left and right. The bottom of the oil can has a protruding ring protruding downwards, and a positioning device is installed at the rear end of the top of the workbench. The positioning device includes a guide rod extending forward and backward and a second drive mechanism for driving the guide rod to move forward and backward. The front end of the guide rod extends into the base and passes through the protruding ring. The rear end of the workbench is fixed with an inclined bracket. The bracket is equipped with a second clamping device for clamping the filling port of the oil can. The second clamping device includes a pair of clamping plates and a third driving mechanism for driving the clamping plates to move left and right. The ends of the two clamping plates have semi-circular holes, and the two semi-circular holes are joined together to form a circular through hole that runs vertically through the top and bottom. The upper end of the bracket is equipped with a pressure head and a fourth drive mechanism for driving the pressure head to move up and down. The pressure head extends into the through hole to block the injection port.

2. The air-tight tooling self-adapting structure according to claim 1, wherein: The first drive mechanism includes two lateral clamping cylinders, which are fixed on the left and right sides of the front end of the worktable, respectively. A clamping block is fixedly connected to the piston rod end of each of the two lateral clamping cylinders.

3. The air-tight tooling self-adapting structure of claim 2, wherein: Both clamping blocks have a fixing block at the top that matches the shape of the oil can's outer wall. The front left and right sides of the base have a notch, and the fixing block passes through the notch and presses against the outer wall of the oil can.

4. The air-tight tooling self-adapting structure of claim 1, wherein: The rear end of the base has an upward-facing recessed hole, and the rear side wall of the base has a first circular hole that runs through the front and back. The first circular hole communicates with the recessed hole. The convex ring has a second circular hole that runs through the front and back. The convex ring is accommodated in the recessed hole, and the front end of the guide rod passes through the first circular hole and the second circular hole. The second drive mechanism includes a front-pushing cylinder that extends front and back. A push plate is fixed to the piston rod end at the front end of the front-pushing cylinder, and the rear end of the guide rod is fixedly connected to the front end of the push plate.

5. The air-tight tooling self-adapting structure of claim 1, wherein: The third drive mechanism includes upper clamping cylinders fixed on the left and right sides of the lower end of the bracket, with the piston rod end of the upper clamping cylinder fixedly connected to the clamping plate.

6. The self-adaptive structure of the airtight tooling according to claim 5, characterized in that: Both semicircular holes have protruding pressure blocks on their inner walls, which are used to contact the outer wall of the injection port.

7. The air-tight tooling self-adapting structure of claim 1, wherein: The fourth drive mechanism includes a pressing cylinder fixed to the middle of the upper end of the bracket. The piston rod end of the lower end of the pressing cylinder is fixedly connected to the upper end of the pressing head, and the pressing head is located above the through hole.

8. The air-tight tooling self-adapting structure of claim 1, wherein: The bottom of the oil container has three downward-protruding outlets. The middle of the base has a first through hole that runs vertically through the three outlets. The front end of the workbench has a second through hole that runs vertically through the first through hole. A lifting cylinder is fixed to the bottom of the workbench. A lifting block is fixed to the piston rod end of the upper end of the lifting cylinder. Three plugs are fixed to the top of the lifting block. The lifting block passes through the second through hole, and the three plugs are used to block the bottom of the three outlets.

9. The air-tight tooling self-adapting structure of claim 1, wherein: A dotting cylinder is fixed to the right end of the workbench. A dotting seat is fixed to the piston rod end of the left end of the dotting cylinder. An iron rod extending to the left and right is fixed to the upper end of the dotting seat. The iron rod is located to the right of the oil can.

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