A tool for coating an internal combustion engine part

Abstract

The utility model relates to a kind of tools special for coating film of internal combustion engine parts, including chassis, part body and limit fixture, when fixing internal combustion engine part body, first pull handrail lever and drive rotary block rotation, rotary block rotates together with stem, rotary block bottom protruding block moves up, and drive two push block to move up, since push block slides in pushing frame, can drive pressing plate to move up, pressing plate drives two side sliders to move up, and realize the deformation of elastic member, when elastic member deforms, spring is stretched, since upper seat is hinged on slider, lower seat is hinged on chassis, can realize spring deformation, make pressing plate move up, and telescopic rod is equipped in spring, protect spring, avoid spring bending, at this time, part body one end is passed through pressing plate, and part body one end round hole is inserted into positioning seat, loosen the pull of handrail lever, under the action of spring, drive pressing plate to move down, and positioning frame in the bottom of pressing plate is pressed and holds part body to limit.

Description

Technical Field

[0001] This utility model relates to the field of parts coating fixture technology, specifically a special tool for coating internal combustion engine parts. Background Technology

[0002] In the production of internal combustion engines such as commercial vehicle diesel engines and high-performance passenger car engines, core components with curved surfaces, such as connecting rod bearings and valve seat rings, require PVD and DLC coating processes to improve wear resistance and anti-galling properties to meet the demands of high-load operating conditions. The coating of these curved surfaces requires extremely high positioning accuracy, ensuring complete exposure and no obstruction of the curved surface, while also adapting to the rapid loading and unloading requirements of mass production. Currently, the industry mostly uses traditional bolt-clamping fixtures or customized chuck structures for coating internal combustion engine parts with curved surfaces. Bolt-clamping fixtures require manually tightening bolts to fix the parts one by one, and disassembly also requires loosening and unloading one by one. The loading and unloading of a single set of fixtures is time-consuming and difficult to adapt to the pace of batch coating production. Especially in the scenario of coating the curved surface of connecting rod bearings, traditional fixtures either slow down the production progress due to low fixing efficiency or affect the coating quality due to shading problems. Therefore, we need to provide a special tool for coating internal combustion engine parts. Utility Model Content

[0003] The purpose of this utility model is to provide a special tool for coating internal combustion engine parts. Multiple limiting clamps are provided on the top of the chassis. The multiple limiting clamps are distributed around the top of the chassis, which can quickly fix and clamp multiple parts, and make the arc-shaped surface of the parts face outward, which facilitates the subsequent coating treatment of the arc-shaped surface, thus solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a special tool for coating internal combustion engine parts, comprising: The chassis, the part body, and the limiting fixtures are provided. The top of the chassis is provided with multiple limiting fixtures, which are used to fix the part body on the chassis to facilitate subsequent coating of the arc-shaped end of the part surface. The limiting clamp includes a pressure plate, a vertical plate, and a pressing member. The pressure plate is provided on the top of the part body, and vertical plates are slidably installed on both sides of the pressure plate. The bottom of the vertical plates is fixed to the top of the chassis. The pressing member is installed between the two vertical plates and is used to push the pressure plate to squeeze and fix the part body. Specifically, multiple limiting clamps are installed on the top of the chassis, which are distributed around the top of the chassis. These clamps can quickly fix and hold multiple parts, with the curved surface of the parts facing outwards, which facilitates subsequent coating treatment of the curved surface. The multiple limiting clamps distributed around the chassis can fix multiple internal combustion engine parts simultaneously. Compared with traditional single-station clamps, the number of parts that can be processed in a single coating is increased. Moreover, thanks to the quick fixing structure, the overall loading and unloading time of multiple parts is shortened, which is suitable for the efficient production rhythm of batch coating. Ensuring the integrity of the coating on curved surfaces: The fixture design forces the curved surface of the part to face outwards, with no fixture components obstructing the edges and surfaces of the curved surface, avoiding coating dead corners caused by the obstruction of traditional chuck claws, and eliminating the need for secondary rework and re-coating.

[0005] Preferably, the pressing component includes a slider, a groove, and an elastic element. Sliders are fixedly installed on both sides of the pressure plate, and a groove for sliding of the slider is opened in the vertical plate. The slider is connected to the chassis through the elastic element.

[0006] Preferably, the elastic element includes an upper seat, a lower seat, and a spring, the spring being installed between the upper seat and the lower seat, the upper seat being installed on one side of the slider via a hinge seat, and the lower seat being installed on the top of the chassis via a hinge seat.

[0007] Preferably, a telescopic rod is movably sleeved inside the spring, and the telescopic rod is installed between the upper seat and the lower seat.

[0008] Preferably, it also includes a stripping component for pulling up the pressure plate. The stripping component includes a rod, a rotating block, a protrusion, and a linkage component. The rod is rotatably installed between two vertical plates and has a rotating block fixedly installed inside. A protrusion is fixedly installed at the bottom of the rotating block, and the linkage component is installed between the pressure plate and the protrusion.

[0009] Preferably, the linkage component includes a push block and a push frame. Push blocks are fixedly installed on both sides of the protrusion, and a push frame is slidably installed on the surface of the push block, with the push frame fixedly installed on the top of the pressure plate.

[0010] Preferably, a positioning frame that engages with the part body is fixedly installed at the bottom of the pressure plate.

[0011] Preferably, the top of the chassis is provided with a positioning seat that mates with the inner hole of the part body.

[0012] Preferably, the bottom of the positioning frame is provided with an adhesive layer.

[0013] Preferably, a handrail is fixedly installed on the surface of the rotating block.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model features multiple limiting clamps on the top of the chassis, arranged in a ring around the top of the chassis. These clamps can quickly and securely hold multiple parts, with the curved surfaces of the parts facing outwards to facilitate subsequent coating treatment of the curved surfaces. The ring-shaped limiting clamps can simultaneously fix multiple internal combustion engine parts. Compared to traditional single-station clamps, the number of parts that can be processed in a single coating operation is increased. Furthermore, thanks to the quick-fixing structure, the overall loading and unloading time for multiple parts is shortened, making it suitable for the efficient production rhythm of batch coating. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional view of the separated body of the component of this utility model; Figure 3 This is a partial three-dimensional structural view of the present invention; Figure 4 The structure of this utility model Figure 1 Enlarged view of a portion of point A in the middle; Figure 5 This is a front view of the stripper component of this utility model.

[0016] In the diagram: 1. Chassis; 2. Part body; 3. Limiting fixture; 31. Pressure plate; 32. Vertical plate; 33. Holding component; 331. Slider; 332. Slide groove; 333. Elastic component; 3331. Upper seat; 3332. Lower seat; 3333. Spring; 4. Telescopic rod; 5. Unloading component; 51. Rod body; 52. Rotating block; 53. Protrusion; 54. Linkage component; 541. Push block; 542. Push frame; 6. Positioning frame; 7. Positioning seat. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-5 This utility model provides a technical solution: a special tool for coating internal combustion engine parts, comprising: The chassis 1, the part body 2, and the limiting clamp 3 are provided on the top of the chassis 1. The limiting clamp 3 is used to fix the part body 2 on the chassis 1, which facilitates the subsequent coating of the arc end of the part surface. The limiting clamp 3 includes a pressure plate 31, a vertical plate 32 and a pressing member 33. The pressure plate 31 is provided on the top of the part body 2. The vertical plates 32 are slidably installed on both sides of the pressure plate 31, and the bottom of the vertical plates 32 is fixed to the top of the chassis 1. The pressing member 33 is installed between the two vertical plates 32 and is used to push the pressure plate 31 to press and fix the part body 2. Multiple limiting clamps 3 are provided on the top of the chassis 1. The multiple limiting clamps 3 are distributed around the top of the chassis 1, which can quickly fix and clamp multiple parts 2, and the arc surface of the parts 2 faces outward, which is convenient for subsequent coating treatment of the arc surface. The multiple limiting clamps 3 distributed around the chassis 1 can fix multiple internal combustion engine parts simultaneously. Compared with traditional single-station clamps, the number of parts that can be processed in a single coating is increased. Moreover, relying on the quick fixing structure, the overall loading and unloading time of multiple parts is shortened, which is suitable for the efficient production rhythm of batch coating.

[0019] The holding member 33 includes a slider 331, a groove 332 and an elastic member 333. The slider 331 is fixedly installed on both sides of the pressure plate 31. The groove 332 for sliding of the slider 331 is opened in the vertical plate 32. The slider 331 is connected to the chassis 1 through the elastic member 333. Furthermore, sliders 331 are fixedly installed on both sides of the pressure plate 31 by welding. The sliders 331 are made of 45 steel and have been quenched. The vertical plate 32 has a groove 332 that matches the sliders 331. The sliders 331 and the grooves 332 are clearance fit to ensure that the sliders 331 slide vertically along the grooves 332 without jamming. The sliders 331 are connected to the chassis 1 by elastic elements 333. The upper seat 3331 of the elastic element 333 is fixed to the hinge seat by bolts. The hinge seat is rotatably connected to one side of the slider 331 by a pin. Similarly, the lower seat 3332 is fixed to the hinge seat by bolts and then rotatably connected to the top of the chassis 1 by a pin. This allows the elastic element 333 to adapt to the angle of the slider 331 as it moves, avoiding the deviation of the parts caused by the slider 331 sliding and jamming. The hinge seat is rotatably connected to adapt to the deformation angle of the elastic element 333, preventing the elastic element 333 from breaking due to forced force and improving the service life of the pressure member 33.

[0020] The elastic element 333 includes an upper seat 3331, a lower seat 3332 and a spring 3333. The spring 3333 is installed between the upper seat 3331 and the lower seat 3332. The upper seat 3331 is installed on one side of the slider 331 through a hinge seat, and the lower seat 3332 is installed on the top of the chassis 1 through a hinge seat. It is worth noting that both the upper seat 3331 and the lower seat 3332 are made of Q235 steel by stamping, and the spring 3333 is made of 60Si2Mn alloy spring steel. The two ends of the spring 3333 are fixed to the upper seat 3331 and the lower seat 3332 by welding, respectively, to ensure a stable preload in the initial state. Through the spring steel material and pre-compression design, the clamping force after the parts are fixed is guaranteed to be stable, and displacement of the parts is avoided during the coating process.

[0021] A telescopic rod 4 is movably sleeved inside the spring 3333, and the telescopic rod 4 is installed between the upper seat 3331 and the lower seat 3332. It should be noted that the telescopic rod 4 consists of an inner rod and an outer tube. The inner rod is made of stainless steel, and the outer tube is made of aluminum alloy. The outer diameter of the inner rod and the inner diameter of the outer tube are clearance fit. The top of the inner rod is fixed to the bottom of the upper seat 3331 by a thread. When the spring 3333 is stretched, the telescopic rod 4 can extend and retract synchronously, always providing radial support to the spring 3333, preventing the spring 3333 from bending radially during the stretching / compression process. By radially limiting the telescopic rod 4, the deformation direction of the spring 3333 is kept stable, thereby ensuring the vertical movement of the pressure plate 31 and avoiding deformation caused by uneven force when the parts are fixed.

[0022] It also includes a stripping component 5 for pulling up the pressure plate 31. The stripping component 5 includes a rod 51, a rotating block 52, a protrusion 53 and a linkage component 54. The rod 51 is rotatably installed between the two vertical plates 32 and the rotating block 52 is fixedly installed inside. The bottom of the rotating block 52 is fixedly installed with the protrusion 53. The linkage component 54 is installed between the pressure plate 31 and the protrusion 53. Specifically, the rod body 51 is made of 45# steel. Both ends of the rod body 51 are rotatably connected to the vertical plate 32 through bearings. The bearings are deep groove ball bearings to ensure smooth rotation of the rod body 51. The rotating block 52 is fixed to the inside of the rod body 51 by set screws. The bottom of the rotating block 52 is integrally molded with a protrusion 53. The two ends of the linkage 54 are respectively in contact with the top of the pressure plate 31 and the side of the protrusion 53. When the rotating block 52 drives the protrusion 53 to rotate, the protrusion 53 pushes the pressure plate 31 to move upward along the slide groove 332 of the vertical plate 32 through the linkage 54, realizing the reverse coordination with the holding part 33. Through the design of bearings and nylon rotating block 52, the operating resistance of the stripper 5 is reduced, and the parts are quickly released. The fan-shaped structure of the protrusion 53 controls the upward stroke of the pressure plate 31, avoiding excessive upward movement of the pressure plate 31 which would cause excessive stretching and damage to the elastic part 333, ensuring reliable coordination between stripping and fixing actions.

[0023] The linkage 54 includes a push block 541 and a push frame 542. Push blocks 541 are fixedly installed on both sides of the protrusion 53. The push frame 542 is slidably installed on the surface of the push block 541 and the push frame 542 is fixedly installed on the top of the pressure plate 31. Among them, the push block 541 is made of polytetrafluoroethylene, and the protrusion 53 is welded and fixed on both sides; the push frame 542 is made of cold-rolled steel plate (SPCC) bent and formed. The push frame 542 is fixed to the top of the pressure plate 31 by welding. The inner side of the push frame 542 and the arc surface of the push block 541 are in surface contact. When the protrusion 53 drives the push block 541 to rotate, the arc surface of the push block 541 slides along the inner side of the push frame 542, converting the rotational motion into the vertical upward motion of the push frame 542, which in turn drives the pressure plate 31 to move upward. The surface contact design between the push frame 542 and the push block 541 disperses the transmission force, prevents local stress concentration from causing the push frame 542 to deform, ensures stable transmission of the unloading action, and improves the efficiency of parts disassembly.

[0024] A positioning frame 6 that engages with the part body 2 is fixedly installed at the bottom of the pressure plate 31; Specifically, a positioning frame 6 is installed at the bottom of the pressure plate 31. The positioning frame 6 is injection molded from ABS engineering plastic. The inner side of the positioning frame 6 has a groove that matches the arc surface of the part body 2. The connecting bolts between the positioning frame 6 and the pressure plate 31 are recessed to prevent the bolt heads from obstructing the coating area of ​​the part. Through the precise matching between the groove of the positioning frame 6 and the arc surface of the part, the part can be quickly positioned, avoiding manual alignment deviation. The ABS plastic material has low hardness, which prevents damage to the surface of the part during clamping. The detachable design makes it easy to replace positioning frames 6 of different specifications, adapting to multiple models of parts and reducing tooling costs.

[0025] The top of the chassis 1 is provided with a positioning seat 7 that mates with the inner hole of the part body 2; It is worth noting that the positioning seat 7 is a cylindrical protrusion structure. The height of the positioning seat 7 is 1 / 2 to 2 / 3 of the depth of the inner hole of the part body 2, ensuring that the inner hole of the part has sufficient support stability after being fitted into the positioning seat 7. The surface roughness of the positioning seat 7 is Ra0.8μm. Through the precise fit between the positioning seat 7 and the inner hole of the part, the radial positioning of the part is achieved, avoiding the rotation of the part around the vertical axis during the coating process and improving the overall positioning accuracy of the part.

[0026] The bottom of the positioning frame 6 is provided with an adhesive layer; The adhesive layer is made of high-temperature resistant silicone material with a thickness of 0.5-1mm. It is bonded and fixed to the bottom of the positioning frame 6 with silicone-specific adhesive. The surface of the adhesive layer is rough to increase the friction with the part body 2, and the adhesive layer has a certain degree of elasticity.

[0027] A handrail is fixedly installed on the surface of the rotating block 52; The end of the handrail away from the rotating block 52 can be fitted with an anti-slip rubber sleeve; the welded joint between the handrail and the rotating block 52 is provided with reinforcing ribs to enhance the connection strength between the handrail and the rotating block 52.

[0028] When this device fixes the main body 2 of the internal combustion engine component, first pull the handle to drive the rotating block 52 to rotate. The rotating block 52 rotates together with the rod 51. The bottom protrusion 53 of the rotating block 52 moves upward, and drives the two push blocks 541 to move upward. Since the push blocks 541 slide within the push frame 542, they can drive the pressure plate 31 to move upward. The pressure plate 31 drives the sliders 331 on both sides to move upward, and realizes the deformation of the elastic element 333. When the elastic element 333 deforms, the spring 3333 is stretched. Since the upper seat 3331 is hinged to the slider 331 and the lower seat 3332 is hinged to the chassis 1, the deformation of the spring 3333 can be realized. The pressure plate 31 is moved upward, and the spring 3333 is equipped with a telescopic rod 4 to protect the spring 3333 and prevent it from bending. At this time, one end of the part body 2 is passed through the pressure plate 31 and the round hole at one end of the part body 2 is inserted into the positioning seat 7. The pull on the handrail is released, and under the action of the spring 3333, the pressure plate 31 is moved downward. The positioning frame 6 at the bottom of the pressure plate 31 presses and limits the part body 2, and the arc surface at one end of the part body 2 faces outward. Multiple part bodies 2 can be fixed on the chassis 1, and a column is provided at the axis of the chassis 1. The chassis 1 can be rotated and sleeved on this column.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special tool for coating internal combustion engine parts, characterized in that, include: The chassis, the part body, and the limiting fixtures are provided. The top of the chassis is provided with multiple limiting fixtures, which are used to fix the part body on the chassis to facilitate subsequent coating of the arc-shaped end of the part surface. The limiting clamp includes a pressure plate, a vertical plate, and a pressing member. The pressure plate is provided on the top of the part body, and vertical plates are slidably installed on both sides of the pressure plate. The bottom of the vertical plates is fixed to the top of the chassis. The pressing member is installed between the two vertical plates and is used to push the pressure plate to squeeze and fix the part body.

2. The special tool for coating internal combustion engine parts according to claim 1, characterized in that: The holding component includes a slider, a groove, and an elastic element. Sliders are fixedly installed on both sides of the pressure plate. A groove for sliding of the slider is opened in the vertical plate. The slider is connected to the chassis through an elastic element.

3. The special tool for coating internal combustion engine parts according to claim 2, characterized in that: The elastic element includes an upper seat, a lower seat, and a spring. The spring is installed between the upper seat and the lower seat, and the upper seat is installed on one side of the slider via a hinge seat, while the lower seat is installed on the top of the chassis via a hinge seat.

4. A special tool for coating internal combustion engine parts according to claim 3, characterized in that: A telescopic rod is movably sleeved inside the spring, and the telescopic rod is installed between the upper seat and the lower seat.

5. A special tool for coating internal combustion engine parts according to claim 1, characterized in that: It also includes a stripper for pulling up the pressure plate. The stripper includes a rod, a rotating block, a protrusion, and a linkage. The rod is rotatably installed between two vertical plates and has a rotating block fixedly installed inside. A protrusion is fixedly installed at the bottom of the rotating block, and the linkage is installed between the pressure plate and the protrusion.

6. A special tool for coating internal combustion engine parts according to claim 5, characterized in that: The linkage component includes a push block and a push frame. Push blocks are fixedly installed on both sides of the protrusion, and a push frame is slidably installed on the surface of the push block, and the push frame is fixedly installed on the top of the pressure plate.

7. A special tool for coating internal combustion engine parts according to claim 6, characterized in that: The bottom of the pressure plate is fixedly equipped with a positioning frame that engages with the part body.

8. A special tool for coating internal combustion engine parts according to claim 1, characterized in that: The top of the chassis is provided with a positioning seat that mates with the inner hole of the part.

9. A special tool for coating internal combustion engine parts according to claim 7, characterized in that: The bottom of the positioning frame is provided with an adhesive layer.

10. A special tool for coating internal combustion engine parts according to claim 5, characterized in that: A handrail is fixedly installed on the surface of the rotating block.

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