Assembly tool for PTC heater

Abstract

The present application relates to the field of PTC heater, especially to a kind of PTC heater assembly tool, including fixed platform, workbench and pipe penetrating component;Fixed platform is connected with workbench, and workbench is vertically placed;Workbench is connected with pipe penetrating component for heating core into aluminum pipe;It also includes fixed block etc.;Workbench is fixedly connected with several fixed blocks.The present application controls the start of external pump machine, and the liquid lubricant is sprayed into the film through the spray pipe, and then the film is pre-lubricated, then the mechanical gripper is controlled to hold the heating core, then the guide rail is controlled to make the moving block drive the mechanical gripper and the heating core along the guide plate to move downward, so that the heating core is penetrated into the film sprayed with liquid lubricant, thereby greatly reducing the friction between the heating core and the film, improving the pipe penetrating efficiency, and effectively reducing the degree of deformation of the film caused by the extrusion of the heating core.

Description

Technical Field

[0001] This invention relates to the field of PTC heaters, and more particularly to an assembly tooling for PTC heaters. Background Technology

[0002] Existing Chinese patent CN105800308B discloses an automatic aluminum tube insertion device for heating cores in ceramic PTC assembly. This device automatically inserts the heating cores into aluminum tubes, making it suitable for large-scale production. Compared to manual feeding, it is more efficient, allows for uninterrupted operation, and has low operating costs.

[0003] However, because the inner wall of the aluminum tube is lined with a thin film, when the heating element is inserted into the aluminum tube, the film will create a large resistance to the insertion of the heating element, making it difficult for the heating element to be inserted into the aluminum tube. Even if the heating element is inserted into the aluminum tube, the film will wrinkle under the pressure of the heating element, affecting the assembly quality of the product. Summary of the Invention

[0004] In order to overcome the disadvantage that when the heating element is inserted into the aluminum tube with a thin film on the inner wall, the film will create a large resistance to the insertion of the heating element, making it difficult for the heating element to be inserted into the aluminum tube, the present invention provides an assembly tooling for a PTC heater.

[0005] An assembly fixture for a PTC heater includes a fixed platform, a worktable, and a tube-insertion assembly. The fixed platform is connected to the worktable, and the worktable is vertically positioned. The worktable is connected to the tube-insertion assembly for inserting the heating element into an aluminum tube. The fixture also includes fixed blocks, elastic plates, a motor I, and a nozzle. Several fixed blocks are fixedly connected to the worktable. Several arc-shaped elastic plates are fixedly connected to each fixed block. The worktable is fixedly connected to the motor I. The output shaft of the motor I is fixedly connected to a nozzle for spraying liquid lubricant.

[0006] Furthermore, it also includes spring rod I; the fixed block and the elastic sheet are slidably connected; each fixed block is fixedly connected to several spring rods I, and the telescopic end of the spring rod I is fixedly connected to the corresponding elastic sheet.

[0007] Furthermore, it also includes an electric actuator I, a support plate, a connecting plate, a rectangular frame, an electric actuator II, and a clamping plate; the worktable is fixedly connected to the support plate; the support plate is fixedly connected to the electric actuator I; the telescopic end of the electric actuator I is fixedly connected to the connecting plate; the connecting plate is fixedly connected to the rectangular frame; two electric actuators II are fixedly connected inside the rectangular frame; each telescopic end of the electric actuator II is fixedly connected to an iron clamping plate.

[0008] Furthermore, the electric push rod II and the clamping plate are set at an angle.

[0009] Furthermore, each end of the clamp has an arc-shaped edge.

[0010] Furthermore, it also includes motor II, rotating rod and hammer rod; several motor II are fixedly connected to one of the fixed blocks; each output shaft of motor II is fixedly connected to a rotating rod, and the rotating rod is rotatably connected to the fixed block; each rotating rod is fixedly connected to several hammer rods, and the hammer rods are in contact with the aluminum tube.

[0011] Furthermore, it also includes spring rod II and a heating plate; several spring rod II are fixedly connected to the worktable; the extension and retraction ends of all spring rod II are fixedly connected to the heating plate, and the heating plate is in contact with the bottom of the aluminum tube.

[0012] Furthermore, the heating plate comes into contact with the hammer rod.

[0013] Furthermore, it also includes an electric push rod III and a collection hopper; a fixed block is fixedly connected to several electric push rods III; the telescopic ends of all the electric push rods III are jointly fixedly connected to a collection hopper, and the collection hopper is located at one end of the aluminum tube.

[0014] Furthermore, it also includes connecting rods and a sponge ring; the collecting hopper is fixedly connected to several connecting rods; all the connecting rods are fixedly connected to a sponge ring, and the sponge ring is in contact with one end of the film.

[0015] The beneficial effects are as follows: This invention controls the start of an external pump to spray liquid lubricant into the film through a nozzle, thereby pre-lubricating the film. Then, the mechanical gripper is controlled to hold the heating core, and the guide rail is controlled to move the moving block to drive the mechanical gripper and the heating core clamp downward along the guide plate, so that the heating core passes into the film sprayed with liquid lubricant. This greatly reduces the friction between the heating core and the film, improves the tube insertion efficiency, and effectively reduces the degree of deformation of the film caused by the pressure of the heating core.

[0016] This invention uses the output shaft of motor II to rotate the rotating rod and the hammer rod, which in turn hammers the aluminum tube. The elastic sheet undergoes adaptive deformation, which in turn causes the aluminum tube and the film to vibrate. This increases the fluidity of the liquid lubricant in the film, allowing the liquid lubricant to flow to various areas of the inner wall of the film more quickly, thereby improving efficiency.

[0017] This invention controls an electric push rod III to move the collecting bucket upwards until it contacts the film, thereby catching the lower end of the film and collecting excess liquid lubricant flowing out from the lower end of the film. As the collecting bucket moves downwards, it drives the connecting rod and the sponge ring downwards until the sponge ring is located at the lower end of the film. Thus, when the heating core passes through the lower end of the film, the heating core passes through the sponge ring, and the sponge ring absorbs and removes the liquid lubricant adhering to the end of the heating core. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly tooling for the PTC heater of the present invention. Figure 2 This is a partial structural schematic diagram of the assembly tooling for the PTC heater of the present invention; Figure 3 This is a partial structural diagram of the assembly tooling for the PTC heater of the present invention, which includes a worktable, a fixing block, a spring sheet, a spring rod I, a motor I, and a nozzle. Figure 4 This is a partial structural diagram of the assembly tooling for the PTC heater disclosed in this invention, which includes a workbench, a support plate, an electric push rod I, a connecting plate, and a rectangular frame. Figure 5 This is a partial structural diagram of the assembly tooling for the PTC heater of the present invention, which includes a connecting plate, a rectangular frame electric push rod II, and a clamping plate. Figure 6 This is a partial structural diagram of the assembly tooling for the PTC heater of the present invention, which includes a workbench, a fixing block, a motor II, a rotating rod, a hammer rod, an electric push rod III, a collecting hopper, a connecting rod, and a sponge ring. Figure 7 This is a partial structural diagram of the assembly tooling for the PTC heater of the present invention, which includes a workbench, a fixing block, a motor II, a rotating rod, a hammer rod, a spring rod II, a heating plate, an electric push rod III, a collection hopper, and a sponge ring. Figure 8 This is a partial structural diagram of the assembly tooling for the PTC heater of the present invention, which includes a workbench, an electric push rod III, a collection hopper, a connecting rod, and a sponge ring.

[0019] Reference numerals: 1-Fixed platform, 2-Workbench, 3-Guide plate, 31-Moving block, 32-Mechanical gripper, 33-Guide rail, 4-Fixed block, 41-Elastic sheet, 42-Spring rod I, 5-Aluminum tube, 51-Film, 6-Heating core, 101-Motor I, 102-Nozzle, 103-Support plate, 104-Electric push rod I, 105-Connecting plate, 106-Rectangular frame, 107-Electric push rod II, 108-Clamping plate, 201-Motor II, 202-Rotating rod, 203-Hammer rod, 204-Spring rod II, 205-Heating plate, 301-Electric push rod III, 302-Collection hopper, 303-Connecting rod, 304-Sponge ring, 108a-Edge part. Detailed Implementation

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings. Example 1

[0021] An assembly fixture for a PTC heater, such as Figure 1-8 As shown, it includes a fixed platform 1, a workbench 2, and a pipe-passing assembly; the workbench 2 is connected to the upper side of the fixed platform 1 and is placed vertically; the pipe-passing assembly is connected to the workbench 2. It also includes a fixing block 4, an elastic sheet 41, a motor I 101, and a nozzle 102; the worktable 2 is fixedly connected to two fixing blocks 4, and the fixing blocks 4 are located on the lower side of the guide plate 3; each fixing block 4 is fixedly connected to two arc-shaped elastic sheets 41; the worktable 2 is bolted to the motor I 101; the output shaft of the motor I 101 is fixedly connected to the nozzle 102, and the nozzle 102 is L-shaped and has a spherical nozzle.

[0022] The pipe-threading assembly includes a movable block 31, a mechanical gripper 32, and a guide rail 33; the worktable 2 is bolted to the guide rail 33; the movable block 31 is slidably connected to the right side of the guide rail 33; the mechanical gripper 32 is fixedly connected to the movable block 31.

[0023] It also includes a spring rod I 42; a fixed block 4 is slidably connected to an elastic plate 41; each fixed block 4 is fixedly connected to two spring rods I 42, and the telescopic end of the spring rod I 42 is fixedly connected to the corresponding elastic plate 41.

[0024] It also includes an electric push rod I 104, a support plate 103, a connecting plate 105, a rectangular frame 106, an electric push rod II 107, and a clamping plate 108; the workbench 2 is fixedly connected to the support plate 103; the support plate 103 is bolted to the electric push rod I 104; the telescopic end of the electric push rod I 104 is fixedly connected to the connecting plate 105; the connecting plate 105 is fixedly connected to the rectangular frame 106; two symmetrically distributed electric push rods II 107 are fixedly connected inside the rectangular frame 106; each telescopic end of the electric push rod II 107 is fixedly connected to an iron clamping plate 108.

[0025] The electric push rod II 107 and the clamping plate 108 are set at an angle.

[0026] Each end of the clamping plate 108 has an arc-shaped edge portion 108a.

[0027] In use, the external pump is first connected to the nozzle 102. The external conveying mechanism transports the aluminum tube 5 to be fitted with the heating core 6 to the space between the elastic plates 41 on the fixing block 4. The inner wall of the aluminum tube 5 is already covered with a thin film 51. The external conveying mechanism transports the heating core 6 to the guide plate 3, so that the elastic plates 41 fix the aluminum tube 5 with the thin film 51 on the inner wall. When aluminum tubes 5 of different sizes are placed between the elastic plates 41, the elastic plates 41 compress the spring rod I 42. Thus, the elastic plates 41 clamp and fix the aluminum tube 5 under the elastic force of the spring rod I 42, so that the elastic plates 41 can adapt to aluminum tubes 5 of different sizes.

[0028] Next, the control motor I101 is started, and the output shaft of the motor I101 drives the nozzle 102 to rotate 90 degrees counterclockwise from the front-to-back view until the spherical nozzle of the L-shaped nozzle 102 is located inside the right port of the film 51. Then, the control external pump is started, and liquid lubricant is sprayed into the film 51 through the nozzle 102 to pre-lubricate the film 51. The liquid lubricant is a non-corrosive and non-conductive lubricating dehumidifier. Then, the control mechanical gripper 32 is used to hold the heating core 6. Then, the control guide rail 33 is used to move the moving block 31 to move the mechanical gripper 32 and the heating core 6 along the guide plate 3 downward, so that the heating core 6 passes into the film 51 sprayed with liquid lubricant. This greatly reduces the friction between the heating core 6 and the film 51, improves the tube insertion efficiency, and effectively reduces the degree of deformation of the film 51 caused by the pressure of the heating core 6.

[0029] Because the aluminum tube 5 is rectangular and relatively long, the spherical nozzle of the spray pipe 102 cannot completely spray the liquid lubricant into all areas of the film 51, but only into the upper area of ​​the film 51. Therefore, the resistance to the leftward movement of the heating core 6 gradually increases, reducing the tube-penetrating efficiency. Therefore, by making the worktable 2 and its connected components vertical, such as... Figure 1 As shown, liquid lubricant is then sprayed into the film 51 through the nozzle 102, so that the liquid lubricant can flow down along the inner wall of the film 51 to various areas of the film 51 under the action of gravity, thereby improving the uniformity of the liquid lubricant in the film 51. Then, the guide rail 33 is controlled to make the moving block 31 drive the mechanical gripper 32 and the heating core 6 to move down along the guide plate 3, so that the heating core 6 is vertically inserted into the film 51, improving the tube insertion efficiency.

[0030] However, due to the small size of the port of the film 51, it is initially difficult for the heating element 6 to penetrate into the film 51. Therefore, before the heating element 6 moves downward, the electric push rod I 104 is controlled to move the connecting plate 105, the rectangular frame 106, and their connected components downward until the side of the port of the film 51 is located in the gap between the clamping plate 108 and the rectangular frame 106. Figure 5 As shown, next, the clamping plate 108 controls the electric push rod II 107 to shorten, causing the clamping plate 108 to move towards the side closer to the rectangular frame 106, so that the clamping plate 108 causes the film 51 to fit tightly against the rectangular frame 106, thereby opening the port of the film 51, making it easier for the heating core 6 to penetrate into the film 51.

[0031] However, when the heating core 6 penetrates the film 51, the film 51 will be pushed downward by the heating core 6, causing the port of the film 51 to move downward, resulting in an uneven port. Therefore, by making the clamping plate 108 drive the film 51 to fit tightly against the rectangular frame 106, the clamping plate 108 clamps the port of the film 51, fixing the film 51 and preventing it from being pulled. Furthermore, due to the rough design of the clamping plate 108, the friction between the clamping plate 108 and the film 51 is increased, thereby increasing the clamping force of the clamping plate 108 on the film 51 and improving the fixing effect. Since the clamping plate 108 has an arc-shaped edge 108a, the squeezing force of the clamping plate 108 on the corners of the film 51 is reduced, thus reducing the degree of deformation of the corners of the film 51.

[0032] Furthermore, since the film 51 may be arranged in a long strip inside the aluminum tube 5 or in a corrugated winding arrangement, when the film 51 is in a corrugated state, it will delaminate when subjected to the extrusion force of the heating core 6, thus destroying the layered winding state of the film 51. Therefore, by setting the electric push rod II 107 and the clamping plate 108 at an angle, the electric push rod II 107 drives the clamping plate 108 to tilt towards the side closer to the rectangular frame 106, thereby causing the port of the film 51 to be tilted and pressed by the rectangular frame 106 and the clamping plate 108, thereby causing the layered structure of the film 51 to bend, preventing the layers of the film 51 from separating from each other, and avoiding the destruction of the layered winding state of the film 51. Example 2

[0033] Based on Example 1, such as Figure 6-8 As shown, it also includes a motor II 201, a rotating rod 202, and a hammer rod 203; one of the fixing blocks 4 is bolted to two motors II 201; each output shaft of motor II 201 is fixed to a rotating rod 202, and the rotating rod 202 is rotatably connected to the fixing block 4; each rotating rod 202 is fixed to several hammer rods 203, and the hammer rods 203 are in contact with the aluminum tube 5.

[0034] It also includes spring rod II 204 and heating plate 205; two spring rods II 204 are fixedly connected to the worktable 2; the extension ends of all spring rods II 204 are fixedly connected to the heating plate 205, and the heating plate 205 is in contact with the bottom of the aluminum tube 5.

[0035] The heating plate 205 is in contact with the hammer rod 203.

[0036] The liquid lubricant has poor flowability after being sprayed into the film 51. Therefore, it takes a long time for the liquid lubricant to flow to various areas of the inner wall of the film 51 after being sprayed vertically into the film 51, which prolongs the tube penetration time. Therefore, after the liquid lubricant is sprayed into the nozzle 102, the control motor II 201 is started. The output shaft of the motor II 201 causes the rotating rod 202 and the hammer rod 203 to rotate. Then the hammer rod 203 hammers the aluminum tube 5, and the elastic sheet 41 undergoes adaptive deformation, which causes the aluminum tube 5 and the film 51 to vibrate. This increases the flowability of the liquid lubricant in the film 51, allowing the liquid lubricant to flow to various areas of the inner wall of the film 51 more quickly and improving efficiency.

[0037] After the heating core 6 is fully inserted into the film 51, in order to prevent the heating core 6 from easily shifting within the film 51 due to the presence of liquid lubricant between the film 51 and the heating core 6, which would cause deviations in the assembly accuracy of the heating core 6, the heating plate 205 is heated. The heating plate 205 heats the aluminum tube 5 through heat transfer, thereby accelerating the drying of the liquid lubricant between the film 51 and the heating core 6, making the bond between the film 51 and the heating core 6 tighter, and improving the assembly effect. Furthermore, when the hammer rod 203 hammers the aluminum tube 5, the hammer rod 203 also hammers the heating plate 205, causing the heating plate 205 to reciprocate under the elastic force of the spring rod II 204. In turn, the heating plate 205 hammers the bottom surface of the aluminum tube 5, causing the bottom surface of the aluminum tube 5 to vibrate, thereby improving the flow efficiency of the liquid lubricant in the film 51. Example 3

[0038] Based on Example 2, such as Figure 6-8 As shown, it also includes an electric push rod Ⅲ301 and a collection hopper 302; the fixing block 4 is bolted to two electric push rods Ⅲ301; the telescopic ends of all the electric push rods Ⅲ301 are fixed to a collection hopper 302, and the collection hopper 302 is located at one end of the aluminum tube 5.

[0039] It also includes connecting rods 303 and sponge rings 304; the collecting hopper 302 is fixedly connected to two connecting rods 303; all the connecting rods 303 are fixedly connected to a sponge ring 304, and the sponge ring 304 is in contact with one end of the film 51.

[0040] When the liquid lubricant is vertically sprayed into the film 51, excess liquid lubricant will flow out from the lower side of the film 51 and adhere to the worktable 2, making it difficult to clean. Therefore, after the aluminum tube 5 is placed in the fixing block 4 and before the liquid lubricant is sprayed into the film 51, and after the worktable 2 is flipped, the electric push rod III 301 is controlled to drive the collecting bucket 302 upward until the collecting bucket 302 contacts the film 51. The collecting bucket 302 then catches the lower end of the film 51, collecting the excess liquid lubricant flowing out from the lower end of the film 51. Just before the heating core 6 is about to completely pass through the film 51, the electric push rod III 301 is controlled to drive the collecting bucket 302 downward to prevent the collecting bucket 302 from obstructing the heating core 6 as it exits from the lower end of the film 51. Figure 8 As shown.

[0041] Since the end of the heating core 6 will be covered with a lot of liquid lubricant when it passes through the film 51, which is inconvenient to clean manually, the connecting rod 303 and the sponge ring 304 will move downward when the collecting hopper 302 moves downward, until the sponge ring 304 is located at the lower end of the film 51. Thus, when the heating core 6 passes through the lower end of the film 51, the heating core 6 passes through the sponge ring 304, and the sponge ring 304 absorbs and removes the liquid lubricant adhering to the end of the heating core 6.

[0042] When the heating element 6 is fully inserted into the film 51 inside the aluminum tube 5, the tube insertion assembly is completed. Then, the external conveying mechanism is controlled to separate the assembled aluminum tube 5 and heating element 6 from the elastic sheet 41, thereby removing the assembled aluminum tube 5 and heating element 6.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An assembly fixture for a PTC heater, comprising a fixed platform (1), a worktable (2), and a tube-insertion assembly; the fixed platform (1) is connected to the worktable (2), and the worktable (2) is vertically positioned; the worktable (2) is connected to a tube-insertion assembly for inserting a heating element (6) into an aluminum tube (5); characterized in that: It also includes a fixing block (4), an elastic piece (41), a motor I (101), and a nozzle (102); the worktable (2) is fixedly connected to several fixing blocks (4); each fixing block (4) is fixedly connected to several arc-shaped elastic pieces (41); the worktable (2) is fixedly connected to a motor I (101); the output shaft of the motor I (101) is fixedly connected to a nozzle (102) for spraying liquid lubricant. It also includes an electric actuator I (104), a support plate (103), a connecting plate (105), a rectangular frame (106), an electric actuator II (107), and a clamping plate (108); the workbench (2) is fixedly connected to the support plate (103); the support plate (103) is fixedly connected to the electric actuator I (104); the telescopic end of the electric actuator I (104) is fixedly connected to the connecting plate (105); the connecting plate (105) is fixedly connected to the rectangular frame (106); two electric actuators II (107) are fixedly connected inside the rectangular frame (106); each electric actuator II (107) has an iron clamping plate (108) fixedly connected to its telescopic end; It also includes motor II (201), rotating rod (202) and hammer rod (203); one of the fixed blocks (4) is fixedly connected to several motor II (201); each output shaft of motor II (201) is fixedly connected to a rotating rod (202), and the rotating rod (202) is rotatably connected to the fixed block (4); each rotating rod (202) is fixedly connected to several hammer rods (203), and the hammer rods (203) are in contact with the aluminum tube (5); the inner wall of the aluminum tube (5) is covered with a film (51), and the side of the end of the film (51) is located in the gap between the clamp (108) and the rectangular frame (106).

2. The assembly tooling for a PTC heater according to claim 1, characterized in that, It also includes a spring rod I (42); a fixed block (4) and an elastic plate (41) are slidably connected; each fixed block (4) is fixedly connected to several spring rods I (42), and the telescopic end of the spring rod I (42) is fixedly connected to the corresponding elastic plate (41).

3. The assembly tooling for a PTC heater according to claim 1, characterized in that, The electric push rod II (107) and the clamping plate (108) are set at an angle.

4. The assembly tooling for a PTC heater according to claim 1, characterized in that, Each end of the clamp (108) is provided with an arc-shaped edge (108a).

5. The assembly tooling for a PTC heater according to claim 1, characterized in that, It also includes spring rod II (204) and heating plate (205); several spring rods II (204) are fixedly connected to the worktable (2); the extension ends of all spring rods II (204) are fixedly connected to the heating plate (205), and the heating plate (205) is in contact with the bottom of the aluminum tube (5).

6. The assembly tooling for a PTC heater according to claim 5, characterized in that, The heating plate (205) is in contact with the hammer rod (203).

7. The assembly tooling for a PTC heater according to claim 1, characterized in that, It also includes an electric push rod Ⅲ (301) and a collection bucket (302); a number of electric push rods Ⅲ (301) are fixedly connected to the fixing block (4); the telescopic ends of all the electric push rods Ⅲ (301) are fixedly connected to a collection bucket (302), and the collection bucket (302) is located at one end of the aluminum tube (5).

8. The assembly tooling for a PTC heater according to claim 7, characterized in that, It also includes connecting rods (303) and a sponge ring (304); the collecting hopper (302) is fixedly connected to several connecting rods (303); all the connecting rods (303) are fixedly connected to a sponge ring (304), and the sponge ring (304) is in contact with one end of the film (51).

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