PTC auxiliary electric heater aluminum pipe cutting disc fixing structure

Abstract

The utility model discloses a kind of PTC auxiliary electric heater aluminium tube cutting disc fixing structure, including bearing plate, is installed on the rack of PTC auxiliary electric heater aluminium tube cutting equipment;Shaft, is connected in the lower part of bearing plate by bearing seat;Cutting disc, is sleeved in the output end of shaft;Fixed component, is set to shaft, for cutting disc is fixedly pressed in the output end of shaft;Fixed component includes the locating piece being set to the inside of shaft and the lock sleeve being located at the outer circumferential side of shaft, wherein, cutting disc is sleeved in the inside of shaft locating piece, lock sleeve and locating piece axial limit cooperation.The utility model is through the design of the locating piece and lock sleeve of being set, operator only needs to complete the clamping and release of cutting disc by simple rotation and push-pull action, significantly shorten change production time, and then can realize quick, convenient disassembly, greatly reduce operating time, meet the demand of efficient change production.

Description

Technical Field

[0001] This utility model relates to a fixing structure for an aluminum tube cutting disc of a PTC auxiliary electric heater. Background Technology

[0002] As a core component of the thermal management system of new energy vehicles, the PTC auxiliary electric heater's aluminum tube shell cutting precision directly affects the product's sealing performance, thermal conductivity, and assembly reliability.

[0003] Currently, most aluminum tube cutting discs in the industry are secured by directly locking the disc to the end of the shaft with a clamping nut. While this method is simple in structure, the disassembly and assembly process requires repeated rotations, making it cumbersome and time-consuming, and difficult to meet the needs of efficient production changeover. At the same time, repeated assembly and disassembly can easily cause thread wear or stripping, shortening the spindle's service life.

[0004] Therefore, a fixing structure for the aluminum tube cutting disc of a PTC auxiliary electric heater is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a fixing structure for the aluminum tube cutting disc of a PTC auxiliary electric heater, so as to solve the problem mentioned in the background art that the fixing of traditional aluminum tube cutting discs is mostly done by directly locking the cutting disc to the end of the shaft by tightening nuts, which is cumbersome and time-consuming and easily causes thread wear or stripping.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a fixing structure for an aluminum tube cutting disc of a PTC auxiliary electric heater, comprising: The support plate is installed on the frame of the PTC auxiliary electric heater aluminum tube cutting equipment; The shaft is connected to the lower part of the bearing plate via a bearing housing; A cutting disc is fitted onto the output end of the shaft; A fixing component, disposed on the shaft, is used to press and fix the cutting disc to the output end of the shaft; The fixing assembly includes a positioning element disposed inside the shaft and a locking sleeve located on the outer periphery of the shaft. The cutting disc is sleeved inside the shaft positioning component, and the locking sleeve is axially limited to the positioning component.

[0007] Preferably, the positioning element includes an internal cavity located inside the shaft, a guide rod is provided at the bottom end of the internal cavity, a positioning sleeve is slidably connected to the outer periphery of the guide rod, and two sets of positioning bolt plates are provided at the tail end of the shaft on the positioning sleeve. The shaft sidewall, located beside the positioning bolt plate, has a moving channel for the positioning bolt plate to extend radially or be retracted. The built-in cavity is provided with a return spring on the outer periphery of the positioning sleeve, with its two ends abutting against the end wall of the built-in cavity and the flange of the positioning sleeve, respectively, to provide elastic return force.

[0008] Preferably, the two sets of positioning bolt plates are respectively provided with connecting rods and connecting sleeves on opposite sides. The connecting rods are telescopically inserted into the connecting sleeves to guide the two sets of positioning bolt plates to move radially synchronously.

[0009] Preferably, the positioning bolt plate is in the shape of a triangular truncated pyramid, and its inclined surface slides against the inner sidewall of the moving channel to convert the axial thrust into radial extension force.

[0010] Preferably, the end face of the positioning sleeve is provided with a polygonal rotating groove for cooperating with an external rotating drive tool.

[0011] Preferably, the outer periphery of the tail end of the positioning sleeve is provided with a rectangular positioning boss, the inner side wall of the shaft is provided with an axial guide groove, the tail end of the guide groove is connected to a circumferential arc groove, and the positioning boss can slide into the guide groove and be screwed into the arc groove to lock the axial position of the positioning sleeve.

[0012] Preferably, the mating surface of the locking sleeve and the cutting disc is provided with a rubber pad, and symmetrical connecting grooves are provided on both sides of the inner wall of the locking sleeve, the connecting grooves engaging and limiting the position of the protruding positioning bolt plate.

[0013] Preferably, the inner wall of the locking sleeve is provided with a limiting plate, and the outer wall of the shaft is provided with an L-shaped limiting groove. The limiting plate is slidably engaged with the limiting groove to restrict the radial movement of the locking sleeve.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention, through the design of the positioning component and the locking sleeve, allows operators to clamp and release the cutting disc with simple rotation and push-pull actions, eliminating the need for repeated nut rotation. This significantly shortens changeover time, enabling quick and convenient assembly and disassembly, greatly reducing operation time, improving production line changeover efficiency, and meeting the demand for high-efficiency changeover.

[0015] Compared to the traditional method of repeatedly rotating the nut, this application uses a positioning bolt plate, connecting rod, and connecting sleeve to make the connection of the fixing device more stable, without relying on repeated tightening, thereby reducing thread wear, extending the service life of the shaft, and avoiding the disassembly difficulties or loosening problems of the traditional method.

[0016] The locking sleeve and positioning sleeve are designed to ensure that the cutting disc will not loosen during operation. In addition, the triangular truncated pyramid design and sliding fit of the positioning bolt plate effectively convert axial thrust into radial extension force, ensuring the cutting disc is firmly fixed and thus improving stability and safety during the cutting process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 3 This is an enlarged schematic diagram of the structure at point A in an embodiment of this utility model; Figure 4 This is a schematic diagram of the cutting disc peeling structure according to an embodiment of the present invention; Figure 5 This is an enlarged schematic diagram of the structure at point B in an embodiment of this utility model; Figure 6 This is a schematic diagram of the cutting disc castration structure according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the positioning sleeve structure according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the shaft structure according to an embodiment of the present utility model; Figure 9 This is a schematic diagram of the locking sleeve structure according to an embodiment of the present utility model.

[0018] In the diagram: 1. Bearing plate; 2. Shaft; 3. Cutting disc; 4. Fixing assembly; 41. Positioning component; 411. Internal cavity; 412. Guide rod; 413. Positioning sleeve; 4131. Rotating groove; 4132. Positioning boss; 414. Positioning bolt plate; 415. Moving channel; 416. Return spring; 417. Connecting rod; 418. Connecting sleeve; 419. Guide groove; 4110. Arc groove; 42. Locking sleeve; 421. Rubber pad; 422. Connecting groove; 423. Limiting plate; 424. Limiting groove. Detailed Implementation

[0019] To address the problem that traditional aluminum tube cutting discs are often fixed by directly locking the disc to the shaft end with a clamping nut, resulting in cumbersome and time-consuming assembly and disassembly processes that are prone to thread wear or stripping, this utility model provides a PTC auxiliary electric heater aluminum tube cutting disc fixing structure. The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] Please see Figure 1-9 This utility model provides a fixing structure for the aluminum tube cutting disc of a PTC auxiliary electric heater, comprising: The support plate 1 is installed on the frame of the PTC auxiliary electric heater aluminum tube cutting equipment; Shaft 2 is connected to the lower part of the bearing plate 1 via a bearing seat; The cutting disc 3 is sleeved on the output end of the shaft 2; Fixing component 4 is disposed on the shaft 2 and is used to press and fix the cutting disc 3 to the output end of the shaft 2; The fixing component 4 includes a positioning element 41 disposed inside the shaft 2 and a locking sleeve 42 located on the outer periphery of the shaft 2. The positioning component 41 includes an internal cavity 411 located inside the shaft 2. A guide rod 412 is provided at the bottom end of the internal cavity 411. A positioning sleeve 413 is slidably connected to the outer periphery of the guide rod 412. Two sets of positioning bolt plates 414 are provided at the tail end of the positioning sleeve 413. The shaft 2 has a moving channel 415 on its side wall and next to the positioning bolt plate 414, for the positioning bolt plate 414 to extend radially or be stored therein. The built-in cavity 411 is provided with a return spring 416 on the outer periphery of the positioning sleeve 413. The two ends of the return spring 416 abut against the end wall of the built-in cavity 411 and the flange of the positioning sleeve 413, respectively, to provide elastic return force.

[0021] Two sets of positioning bolt plates 414 are respectively provided with connecting rods 417 and connecting sleeves 418 on opposite sides. The connecting rods 417 are telescopically inserted into the connecting sleeves 418 to guide the two sets of positioning bolt plates 414 to move synchronously radially. The positioning bolt plates 414 are truncated triangular in shape, and their inclined surfaces are in sliding contact with the inner sidewall of the moving channel 415 to convert axial thrust into radial extension force.

[0022] The positioning sleeve 413 has a polygonal rotating groove 4131 on its tail end face for cooperating with an external rotating drive tool. The outer circumference of the tail end of the positioning sleeve 413 has a rectangular positioning boss 4132, and the inner side wall of the shaft 2 has an axial guide groove 419. The tail end of the guide groove 419 is connected to a circumferential arc-shaped groove 4110. The positioning boss 4132 can slide into the guide groove 419 and be screwed into the arc-shaped groove 4110 to lock the axial position of the positioning sleeve 413.

[0023] The locking sleeve 42 has a rubber pad 421 on its contact surface with the cutting disc 3. Connecting grooves 422 are symmetrically formed on both sides of the inner wall of the locking sleeve 42, and these grooves engage with the protruding positioning bolt plate 414 for positioning. A limiting plate 423 is provided on the inner wall of the locking sleeve 42, and an L-shaped limiting groove 424 is formed on the outer wall of the shaft 2. The limiting plate 423 slides within the limiting groove 424 to restrict radial movement of the locking sleeve 42.

[0024] The cutting disc 3 is sleeved inside the positioning member 41 of the shaft 2, and the locking sleeve 42 is axially limited to the positioning member 41.

[0025] The working principle of the PTC auxiliary electric heater aluminum tube cutting disc fixing structure provided by this utility model is as follows: The shaft 2 is installed on the lower part of the bearing plate 1 through the bearing seat, the inner hole of the cutting disc 3 is aligned with the output end of the shaft 2, and the cutting disc 3 is slowly inserted into the shaft 2 until the end face of the cutting disc 3 is tightly fitted with the output end face of the shaft 2.

[0026] Insert a rotary drive tool into the polygonal rotary groove 4131 at the tail end of the positioning sleeve 413, press and rotate the positioning sleeve 413, so that the positioning boss 4132 on the outer periphery of the positioning sleeve 413 moves along the guide groove 419. When the positioning boss 4132 moves to the arc-shaped groove 4110 at the tail end of the guide groove 419, rotate the positioning sleeve 413. At this time, the positioning sleeve 413 moves on the outer periphery of the guide rod 412 to squeeze the reset spring 416, and the inclined surface of the positioning bolt plate 414 squeezes the inner wall of the moving channel 415, and is radially stored through the moving channel 415. The locking sleeve 42 is fitted onto the outer periphery of the shaft 2, aligning the inner wall connecting groove 422 of the locking sleeve 42 with the positioning bolt plate 414. Then, the locking sleeve 42 is pushed axially toward the cutting disc 3. Simultaneously, the positioning sleeve 413 is rotated in the opposite direction, causing the positioning boss 4132 on the outer periphery of the positioning sleeve 413 to emerge from the arc-shaped groove 4110 at the tail end of the guide groove 419. At this point, the return spring 416 elastically extends, pushing the positioning bolt plate 414 out from inside the moving channel 415 and locking it inside the connecting groove 422, thus firmly positioning the cutting disc 3 at the output end of the shaft 2. At this point, the cutting disc 3 is restricted in both the axial and radial directions, achieving initial fixation.

[0027] After the locking sleeve 42 engages with the positioning bolt plate 414, the inner wall limiting plate 423 of the locking sleeve 42 will slide into the L-shaped limiting groove 424 on the outer wall of the shaft 2. At this time, rotating the locking sleeve 42 will cause it to move along the transverse section of the L-shaped limiting groove 424, allowing the limiting plate 423 to enter the transverse section for locking, thereby restricting the radial movement of the locking sleeve 42 and completing the final locking of the locking sleeve 42, further enhancing the fixing reliability of the cutting disc 3.

[0028] Unlocking the locking sleeve 42: Rotate the locking sleeve 42 in the opposite direction to make the limiting plate 423 exit from the transverse section of the L-shaped limiting groove 424 and return to the longitudinal section.

[0029] Insert the rotary drive tool into the polygonal rotary groove 4131 at the tail end of the positioning sleeve 413 again, press and rotate the positioning sleeve 413, so that the positioning boss 4132 on the outer periphery of the positioning sleeve 413 moves along the guide groove 419. When the positioning boss 4132 moves to the arc-shaped groove 4110 at the tail end of the guide groove 419, rotate the positioning sleeve 413. At this time, the positioning sleeve 413 moves on the outer periphery of the guide rod 412 to squeeze the reset spring 416, and the inclined surface of the positioning bolt plate 414 squeezes the inner wall of the moving channel 415, and is radially stored through the moving channel 415. After the positioning bolt plate 414 is retracted, the axial and radial restrictions on the cutting disc 3 are released. At this time, the locking sleeve 42 is pulled outward along the axial direction, and then the cutting disc 3 can be easily removed from the output end of the shaft 2.

[0030] 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 fixing structure for an aluminum tube cutting disc of a PTC auxiliary electric heater, characterized in that, include: The support plate (1) is installed on the frame of the PTC auxiliary electric heater aluminum tube cutting equipment; The shaft (2) is connected to the lower part of the bearing plate (1) via a bearing seat; A cutting disc (3) is fitted onto the output end of the shaft (2); A fixing component (4) is provided on the shaft (2) for pressing and fixing the cutting disc (3) to the output end of the shaft (2); The fixing component (4) includes a positioning element (41) disposed inside the shaft (2) and a locking sleeve (42) located on the outer periphery of the shaft (2). The cutting disc (3) is sleeved on the inner side of the positioning member (41) of the shaft (2), and the locking sleeve (42) is axially limited to the positioning member (41).

2. The fixing structure for the aluminum tube cutting disc of a PTC auxiliary electric heater according to claim 1, characterized in that: The positioning component (41) includes an internal cavity (411) located inside the shaft (2). A guide rod (412) is provided at the bottom end of the internal cavity (411). A positioning sleeve (413) is slidably connected to the outer periphery of the guide rod (412). Two sets of positioning bolt plates (414) are provided at the tail end of the positioning sleeve (413). The shaft (2) has a moving channel (415) on its side wall and next to the positioning bolt plate (414) for the positioning bolt plate (414) to extend radially or be stored. The built-in cavity (411) is provided with a return spring (416) on the outer periphery of the positioning sleeve (413), with its two ends abutting against the end wall of the built-in cavity (411) and the flange of the positioning sleeve (413) respectively, providing elastic return force.

3. The fixing structure for the aluminum tube cutting disc of a PTC auxiliary electric heater according to claim 2, characterized in that: The two sets of positioning bolt plates (414) are respectively provided with connecting rods (417) and connecting sleeves (418) on opposite sides. The connecting rods (417) are telescopically inserted into the connecting sleeves (418) to guide the two sets of positioning bolt plates (414) to move radially synchronously.

4. A PTC auxiliary electric heater aluminum tube cutting disc fixing structure according to claim 2 or 3, characterized in that: The positioning bolt plate (414) is in the shape of a triangular frustum, and its inclined surface slides against the inner wall of the moving channel (415) to convert the axial thrust into the radial extension force.

5. The fixing structure for the aluminum tube cutting disc of a PTC auxiliary electric heater according to claim 2, characterized in that: The end face of the positioning sleeve (413) is provided with a polygonal rotating groove (4131) for cooperating with an external rotating drive tool.

6. A PTC auxiliary electric heater aluminum tube cutting disc fixing structure according to claim 2 or 5, characterized in that: The positioning sleeve (413) has a rectangular positioning boss (4132) on the outer periphery of its tail end. The inner side wall of the shaft (2) has an axial guide groove (419). The tail end of the guide groove (419) is connected to a circumferential arc groove (4110). The positioning boss (4132) can slide into the guide groove (419) and be screwed into the arc groove (4110) to lock the axial position of the positioning sleeve (413).

7. The fixing structure for the aluminum tube cutting disc of a PTC auxiliary electric heater according to claim 2, characterized in that: The locking sleeve (42) and the cutting disc (3) are fitted with a rubber pad (421), and symmetrical connecting grooves (422) are provided on both sides of the inner wall of the locking sleeve (42). The connecting grooves (422) engage and limit the position of the protruding positioning bolt plate (414).

8. The fixing structure for the aluminum tube cutting disc of a PTC auxiliary electric heater according to claim 7, characterized in that: The inner wall of the locking sleeve (42) is provided with a limiting plate (423), and the outer wall of the shaft (2) is provided with an L-shaped limiting groove (424). The limiting plate (423) is slidably fitted into the limiting groove (424) to restrict the radial movement of the locking sleeve (42).

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