Piston pin coating clamp

Abstract

The utility model discloses a piston pin coating clamp which comprises a base plate, a top plate, a center supporting rod, rotating rods and a driving mechanism, the center supporting rod is a hollow cylindrical rod, the two ends of the center supporting rod are fixedly connected to the center of the base plate and the center of the top plate respectively, and a plurality of rotating rods distributed at equal angles are arranged around the center supporting rod. The rotating rods are parallel to the center supporting rod, and the center supporting rod rotates to drive the rotating rods on the outer side to rotate synchronously. The two ends of the rotating rod are rotationally connected with the bottom disc and the top disc respectively, the piston pin workpieces penetrate through the rotating rod and are in damping connection with the rotating rod, and the head and tail end faces of the multiple piston pin workpieces are in tight contact; the bottom ends of the rotating rods penetrate through the chassis and are connected with a driving mechanism; the driving mechanism can drive all the rotating rods to rotate simultaneously in the same direction; the fixture not only can improve the charging quantity of products, but also can drive the products to rotate automatically, so that the stability and the uniformity of the coating quality of the products are improved, and the production cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum coating fixtures, in particular to a piston pin coating fixture. Background Art

[0002] Vacuum spin coating technology deposits one or more layers of dense, uniform coatings on workpiece surfaces. These coatings are suitable for workpieces of various shapes, imparting desired physical or mechanical properties. Vacuum coating is widely used in various industrial manufacturing fields, bringing new possibilities to industrial machinery manufacturing. A piston pin, a thick-walled hollow cylinder attached to the piston skirt, withstands pressure and loads during operation. Therefore, the surface of the piston pin must possess sufficient rigidity, strength, and wear resistance. Surface coating can achieve these properties. Currently, there is a lack of suitable fixtures for coating piston pins. Using a single-plate, single-layer fixture results in low furnace loading and low production efficiency. Using a full-furnace fixture results in low efficiency during the clamping process, reduced coating effectiveness, and the resulting uneven coating. Using a simple shift fork to drive the rotation during the coating process can easily cause the fixture to become stuck or precipitate dust, compromising coating quality. Utility Model Content

[0003] In response to the above problems and technical requirements, the utility model provides a piston pin coating fixture, which can not only increase the product loading capacity, but also drive the product to rotate automatically, improve the stability and uniformity of the product coating quality, and save production costs.

[0004] The technical solution of the present utility model is as follows: a piston pin coating fixture comprises a base, a top plate, a central support rod, a rotating rod, and a driving mechanism. The central support rod is a hollow cylindrical rod, the ends of which are fixedly connected to the centers of the base and top plates, respectively. A plurality of rotating rods are arranged around the central support rod at equal angles. The rotating rods are parallel to the central support rod, and rotation of the central support rod drives the outer rotating rods to rotate synchronously. The ends of the rotating rods are respectively connected to the base and top plates for rotation. The rotating rods pass through the piston pin workpieces, and the piston pin workpieces are connected to the rotating rods in a damping manner, so that the end faces of the multiple piston pin workpieces are in close contact. The bottom ends of the rotating rods pass through the base and are connected to the driving mechanism, which can drive all the rotating rods to rotate in the same direction simultaneously. In this solution, the fixture is installed vertically in a coating furnace. The central support rod drives the top and base plates to rotate, causing all the rotating rods to rotate simultaneously within the coating furnace. The rotating rods themselves also rotate around their circumferences to ensure uniform coating. The driving mechanism can simultaneously drive all the rotating rods to rotate, thereby enhancing the uniformity of the coating.

[0005] Furthermore, the drive mechanism includes a central bearing, a sun gear, planetary gears, and a support ring seat. The central bearing is fixedly connected to the center of the bottom surface of the chassis by screws. The sun gear is rotatably connected to the outer ring of the central bearing. Each rotating rod penetrates the outer side of the chassis and connects to a planetary gear. The rotating rod and the planetary gear are keyed, and the planetary gears are all meshed with the sun gear. The support ring seat is coaxially arranged with the chassis and connected to the chassis in parallel by multiple fixed columns. The planetary gears are located between the support ring seat and the chassis. When the sun gear rotates around the central bearing, it can drive all the planetary gears to rotate simultaneously. The planetary gears drive the rotating rod to rotate, so that the circumference of the piston pin workpiece strung on the rotating rod is facing outward, improving the uniformity of the coating.

[0006] Furthermore, a sleeve is provided on the chassis, the sleeve bottom plate is sleeved on the upper surface of the chassis, the inner wall of the sleeve is sleeved on the outside of the chassis and the support ring seat, and the sleeve bottom plate and the chassis are fixedly connected by screws.

[0007] Furthermore, a shift fork assembly is provided at the center of the sun gear. The shift fork assembly includes a fixed ring, a circular sealing plate, and a shift fork rod. The fixed ring is connected to the core of the sun gear by screws. The other end of the fixed ring is fixedly connected to the circular sealing plate. There is a gap between the circular sealing plate and the support ring seat. The bottom surface of the circular sealing plate is fixedly connected to the shift fork rod. The shift fork rod drives the fixed ring and the sun gear to rotate through the circular sealing plate. The shift fork rod is set at the bottom of the circular sealing plate, and the sun gear can be driven to rotate through the shift fork rod. Since the shift fork rod is set at the bottom, the rotation of the shift fork rod will not generate dust that affects the workpiece. In addition, the sun gear and planetary gears are both set inside the sleeve, which has a shielding and protective effect on them, so they will not get stuck. The shift fork assembly can smoothly drive the rotating rod to rotate.

[0008] Furthermore, the top plate, bottom plate, and sleeve bottom plate each have corresponding rectangular through-holes at their centers. The center bearing, retaining ring, and circular sealing plate each have corresponding circular holes at their centers. The circular holes correspond to and surround the rectangular through-holes. The rectangular through-holes serve as stoppers. Inserting the corresponding rectangular stopper shaft through the rectangular through-holes drives the entire center support rod to rotate.

[0009] Furthermore, the rotating rod includes a rod body, a front end support and a tail end support, the front end support includes a first bearing and a first core shaft, the middle part of the first core shaft is rotatably connected in the first bearing, and the two ends extend upward and downward, the tail end support includes a second bearing, a second core shaft and a load-bearing seat, the middle part of the second core shaft is rotatably connected in the second bearing, and the two ends extend upward and downward, the load-bearing seat is fixedly connected to the upper end of the second core shaft, the rod body is a hollow cylinder, the upper end of the rod body is fixedly sleeved with the first core shaft, and the lower end of the rod body is clamped on the load-bearing seat.

[0010] Furthermore, an intermediate disk is radially disposed in the middle of the central support rod. A first layer of rotating rods is disposed between the intermediate disk and the bottom disk, and a second layer of rotating rods is disposed between the intermediate disk and the top disk. The front end supports of the first layer of rotating rods are clamped and fixed to the intermediate disk, and the rear end supports of the second layer of rotating rods are plugged and fixed to the front end supports of the first layer of rotating rods in a one-to-one correspondence. This fixture can accommodate two or more layers of rotating rods, which can increase furnace loading capacity without affecting coating quality, thereby improving processing efficiency.

[0011] The beneficial effects of the present invention are as follows: 1) The fixture can be used to set up multiple layers of rotating rods to carry piston pin workpieces. Compared with single-layer installation, this structure can achieve the same coating effect while providing a sufficient furnace loading capacity, and the coating processing efficiency is high; 2) The driving mechanism arranged at the bottom adopts a structure in which a sun gear and several planetary gears are meshed. The rotation of the sun gear drives the planetary gears and the corresponding rotating rods to rotate, thereby achieving the purpose of rotating the rotating rods and uniform coating. The power for the rotation of the sun gear is provided by the fork assembly arranged at the bottom. The fork rod and the driving mechanism are isolated from each other. Therefore, the dust that may be generated by the rotation of the fork rod will neither affect the sun gear nor the rotating rod and the workpiece, thereby effectively improving the stability and uniformity of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the overall structure diagram of the piston pin coating fixture of the utility model;

[0013] Figure 2 This is a structural diagram of the support rod in the utility model;

[0014] Figure 3 This is a diagram showing the connection structure of the transfer rod, top plate and bottom plate of the utility model;

[0015] Figure 4 This is a schematic diagram of the assembly of the transfer rod of the utility model;

[0016] Figure 5 This is a bottom structural diagram of the driving mechanism in the utility model;

[0017] Figure 6 The internal structure diagram of the drive mechanism with the sleeve removed;

[0018] Figure 7 It is the connection structure diagram of the driving mechanism;

[0019] Figure 8 This is the position relationship diagram of the shift fork rod and the fixing ring after removing the circular sealing plate;

[0020] Marked in the figure are: chassis 1, rectangular through hole 11, top plate 2, center support rod 3, intermediate plate 31, first layer rotating rod 32, second layer rotating rod 33, rotating rod 4, rod body 41, front end support 42, first bearing 421, first core shaft 422, tail end support 43, second bearing 431, second core shaft 432, load-bearing seat 433, drive mechanism 5, center bearing 51, circular hole 511, sun gear 52, planetary gear 53, support ring seat 54, fixing column 55, sleeve 56, shift fork assembly 57, fixing ring 571, circular sealing plate 572, shift fork rod 573, piston pin workpiece 6. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1-8 The figure shows the piston pin coating fixture of the present invention, which includes a chassis 1, a top plate 2, a central support rod 3, a rotating rod 4 and a driving mechanism 5. The central support rod 3 is a hollow cylindrical rod, and the two ends of the central support rod 3 are respectively fixedly connected to the center of the chassis 1 and the top plate 2. A plurality of rotating rods 4 distributed at equal angles are arranged around the central support rod 3. The rotating rods 4 are parallel to the central support rod 3. The rotation of the central support rod 3 drives the outer rotating rods 4 to rotate synchronously.

[0023] The drive mechanism 5 includes a central bearing 51, a sun gear 52, planetary gears 53, and a support ring seat 54. The central bearing 51 is fixedly connected to the center of the bottom surface of the chassis 1 by screws. The sun gear 52 is rotatably connected to the outer ring of the central bearing 51. Each rotating rod 4 penetrates the outer side of the chassis 1 and is connected to a planetary gear 53. The rotating rod 4 and the planetary gear 53 are keyed, and the planetary gears 53 are all meshed with the sun gear 52. The support ring seat 54 is arranged coaxially with the chassis 1 and is connected to the chassis 1 in parallel by multiple fixing columns 55. The planetary gears 54 are located between the support ring seat 54 and the chassis 1. The chassis 1 is also provided with a sleeve 56. The sleeve base is sleeved on the upper surface of the chassis 1. The inner wall of the sleeve 56 is sleeved on the chassis 1 and the outer side of the support ring seat 54. The sleeve base is fixed to the chassis 1 by screws. When the sun gear 52 rotates around the central bearing 51, it can drive all the planetary gears 53 to rotate simultaneously. The planetary gears 53 drive the rotating rod 4 to rotate, so that the circumference of the piston pin workpiece 6 strung on the rotating rod 4 can all face outward, and the coating uniformity is better.

[0024] The two ends of the rotating rod 4 are respectively connected to the chassis 1 and the top plate 2 for rotation. The piston pin workpiece 6 is passed through the rotating rod 4. The piston pin workpiece 6 and the rotating rod 4 are connected in a damping manner. The end faces of multiple piston pin workpieces 6 are in close contact with each other. The bottom end of the rotating rod 4 passes through the chassis 1 and is connected to the driving mechanism 5. The driving mechanism 5 can drive all the rotating rods 4 to rotate in the same direction at the same time.

[0025] The center of the sun gear 52 is provided with a shift fork assembly 57, which includes a fixed ring 571, a circular sealing plate 572, and a shift fork rod 573. The fixed ring 571 is connected to the core of the sun gear 52 by screws. The other end of the fixed ring 571 is fixedly connected to the circular sealing plate 572. There is a gap between the circular sealing plate 572 and the support ring seat 54. The bottom surface of the circular sealing plate 572 is fixedly connected to the shift fork rod 573. The shift fork rod 573 drives the fixed ring 571 and the sun gear 52 to rotate through the circular sealing plate 572. The shift fork rod 573 is set at the bottom of the circular sealing plate 572, and the sun gear 52 can be driven to rotate by the shift fork rod 573. Since the shift fork rod 573 is set at the bottom, the rotation of the shift fork rod 573 will not generate dust that affects the workpiece. In addition, the sun gear 52 and the planetary gears 53 are both set inside the sleeve 56, which has a shielding and protective effect on them, so they will not get stuck. The shift fork assembly 57 can smoothly drive the rotating rod to rotate.

[0026] The rotating rod 4 includes a rod body 41, a front end support 42 and a tail end support 43. The front end support 42 includes a first bearing 421 and a first core shaft 422. The middle part of the first core shaft 422 is rotatably connected to the first bearing 421, and the two ends extend upward and downward. The tail end support 43 includes a second bearing 431, a second core shaft 432 and a load-bearing seat 433. The middle part of the second core shaft 432 is rotatably connected to the second bearing 431, and the two ends extend upward and downward. The load-bearing seat 433 is fixedly connected to the upper end of the second core shaft 432. The rod body 41 is a hollow cylinder. The upper end of the rod body 41 is fixedly sleeved with the first core shaft 422, and the lower end of the rod body 41 is clamped on the load-bearing seat 433. Rectangular through-holes 11 are correspondingly provided at the centers of the top plate 2, bottom plate 1, and sleeve bottom plate. Circular holes 511 are correspondingly provided at the centers of the center bearing 51, retaining ring 571, and circular sealing plate 572. Circular holes 511 correspond to and surround rectangular through-holes 11. Rectangular through-holes 11 serve as stoppers. Inserting a corresponding rectangular stopper shaft through rectangular through-hole 11 drives the entire center support rod 3 to rotate.

[0027] An intermediate disk 31 is radially disposed in the middle of the central support rod 3. A first layer of rotating rods 32 is disposed between the intermediate disk 31 and the bottom plate 1. A second layer of rotating rods 33 is disposed between the intermediate disk 31 and the top plate 2. The front end supports 42 of the first layer of rotating rods 32 are securely fastened to the intermediate disk 31. The rear end supports 43 of the second layer of rotating rods 33 are securely plugged into and correspondingly secured to the front end supports 42 of the first layer of rotating rods 32. This fixture can accommodate two or more layers of rotating rods, which increases furnace loading capacity without compromising coating quality, resulting in high processing efficiency.

[0028] The action process of the present invention is as follows: first, the first-layer rotating rod 32 is clamped, and the piston pin workpieces 6 are rotated into the first-layer rotating rod 32 one by one, so that the end faces of the piston pin workpieces 6 are pressed against each other. After the clamping is completed, the front end support 42 of the first-layer rotating rod 32 is tightly connected with the rod body 41, and the front end support 42 is rotatably connected with the intermediate disk 31. Subsequently, the tail end support 43 of the second-layer rotating rod 33 is tightly connected with the first core shaft 422 of the first-layer rotating rod 32, and the rod body 41 of the second-layer rotating rod 33 is tightly connected to the tail end support 43. The piston pin workpieces 6 are installed one by one on the second-layer rotating rod 33. After rotation, the top disk 2 is connected to the front end of the top of the second-layer rotating rod 33. The end support 42 is connected; the entire fixture is sent into the coating furnace, and the rectangular drive shaft in the coating furnace passes through the circular hole 511 and the rectangular through hole 11 from the bottom to position the central support rod 3, and drive the entire fixture to rotate around the central support rod 3. During the coating process, the shift fork rod 573 is shifted, and the shift fork rod 573 drives the fixed ring 571 to rotate through the circular sealing plate 572, and the fixed ring 571 drives the sun gear 52 to rotate around the center bearing 51. The sun gear 52 simultaneously drives all the planetary gears 53 to rotate, and the planetary gears 53 drive their corresponding rotating rods 4 to rotate around the axis, and the rotating rod 4 drives the piston pin workpiece 6 to rotate, so that the coating effect on the circumference of the piston pin workpiece 6 is more uniform.

[0029] The above descriptions are merely some preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes and substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. Piston pin coating fixture, characterized by: The cam is connected to the chassis and the top plate by a central support rod, and the cam is connected to the center of the chassis and the top plate by a central support rod. The cam is connected to the chassis and the top plate by a central support rod, and the cam is connected to the center of the chassis and the top plate by a central support rod.

2. The piston pin coating fixture according to claim 1, characterized in that: The driving mechanism includes a central bearing, a sun gear, a planetary gear and a support ring seat. The central bearing is fixedly connected to the center of the bottom surface of the chassis by screws. The sun gear is rotatably connected to the outer ring of the central bearing. Each rotating rod penetrates the outside of the chassis and is connected to a planetary gear. The rotating rod and the planetary gear are keyed. The planetary gears are all meshed with the sun gear. The support ring seat is coaxially arranged with the chassis. The support ring seat and the chassis are connected in parallel by multiple fixed columns. The planetary gears are located between the support ring seat and the chassis.

3. The piston pin coating fixture according to claim 2, characterized in that: The chassis is also provided with a sleeve, the sleeve bottom plate is sleeved on the upper surface of the chassis, the inner wall of the sleeve is sleeved on the chassis and the outer side of the support ring seat, and the sleeve bottom plate and the chassis are fixedly connected by screws.

4. The piston pin coating fixture according to claim 3, characterized in that: A shift fork assembly is provided at the center of the sun gear, which includes a fixed ring, a circular sealing plate and a shift fork rod. The fixed ring is connected to the core of the sun gear by screws, and the other end of the fixed ring is fixedly connected to the circular sealing plate. There is a gap between the circular sealing plate and the support ring seat. The bottom surface of the circular sealing plate is fixedly connected to the shift fork rod, and the shift fork rod drives the fixed ring and the sun gear to rotate through the circular sealing plate.

5. The piston pin coating fixture according to claim 4, characterized in that: The centers of the top plate, bottom plate and sleeve bottom plate are respectively provided with rectangular through holes, and the centers of the central bearing, fixing ring and circular sealing plate are respectively provided with circular holes. The circular holes correspond to the positions of the rectangular through holes and surround the rectangular through holes.

6. The piston pin coating fixture according to claim 5, characterized in that: The rotating rod includes a rod body, a front end support and a tail end support. The front end support includes a first bearing and a first core shaft. The middle part of the first core shaft is rotatably connected in the first bearing, and the two ends extend upward and downward. The tail end support includes a second bearing, a second core shaft and a load-bearing seat. The middle part of the second core shaft is rotatably connected in the second bearing, and the two ends extend upward and downward. The load-bearing seat is fixedly connected to the upper end of the second core shaft. The rod body is a hollow cylinder. The upper end of the rod body is fixedly sleeved with the first core shaft, and the lower end of the rod body is clamped on the load-bearing seat.

7. The piston pin coating fixture according to claim 6, characterized in that: An intermediate disk is radially provided in the middle of the central support rod, a first layer of rotating rod is provided between the intermediate disk and the bottom disk, a second layer of rotating rod is provided between the intermediate disk and the top disk, the front end support of the first layer of rotating rod is clamped and fixed on the intermediate disk, and the tail end support of the second layer of rotating rod is plugged and fixed one by one with the front end support of the first layer of rotating rod.

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