PTC (Positive Temperature Coefficient) heating element for low-voltage starting new energy vehicle

Abstract

The utility model relates to the field of PTC (Positive Temperature Coefficient) heating elements, and discloses a PTC heating element for a low-voltage starting new energy vehicle, which comprises a shell and inner frames, four groups of inner frames are fixed on the inner side of the shell, aluminum pipes are fixedly connected between the outer sides of the inner frames, PTC ceramic chips are fixed between the upper part and the lower part in the inner frames, and the PTC ceramic chips are fixed on the outer sides of the inner frames. The upper and lower positions of the inner walls of the two sides of the housing are respectively provided with a side jack. According to the PTC heating element for the low-voltage starting new energy vehicle, pipe bodies are fixed to the top and the bottom of the two sides of a limiting rod respectively, the limiting rod is inserted into positioning insertion holes, the two sets of pipe bodies are fixed to the upper portion and the lower portion of the two sides of the limiting rod, a shielding rod is inserted between side insertion holes, and a shifting wheel is shifted; due to the fact that the inner wall of the shifting wheel is provided with the groove body matched with the external spiral lines of the lead screw, under the condition that the sliding block is limited by the sliding groove, the lead screw can be ejected out of the pipe body and embedded in the circular groove, the lead screw can be locked and reinforced after being sleeved with a nut, and the problem that the ceramic chip lacks protection is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of PTC heating elements, in particular to a PTC heating element for low-voltage starting new energy vehicles. Background Art

[0002] PTC heating element is an important part of PTC heater. It has the advantages of low voltage at startup, small thermal resistance and fast heat exchange efficiency. It can reduce the power consumption of the equipment when it is heating up and maintain a constant temperature. In order to ensure the safety of new energy vehicles while driving, PTC heating elements are often used as heating mechanisms.

[0003] However, in the past, ceramic components were often directly fixed inside the metal frame during manufacturing, lacking corresponding shielding structures. If the external environment of the assembly would produce continuous and long-term vibration, the fragile ceramic components would easily break due to contact with external accessories, which is not conducive to maintaining the connection strength of the structure.

[0004] Now, a new type of low-voltage starting PTC heating element for new energy vehicles is proposed to solve the above problems. Utility Model Content

[0005] The purpose of the present invention is to provide a low-voltage starting PTC heating element for new energy vehicles, so as to solve the problem of lack of protection of ceramic sheets mentioned in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A PTC heating element for low-voltage starting new energy vehicles, comprising a shell and an inner frame, four groups of inner frames are fixed on the inner side of the shell, and aluminum tubes are fixedly connected between the outer sides of the inner frames, and PTC ceramic plates are fixed between the upper and lower parts of the inner frame, side sockets are respectively provided at the upper and lower positions of the inner walls on both sides of the shell, and a shielding rod is transversely inserted between the insides of the side sockets, and circular grooves are respectively provided on both sides of the shielding rod, positioning sockets are respectively provided at the center of the inner walls on both sides of the shell, and a limit rod is transversely inserted between the insides of the positioning sockets, a tube body is respectively fixed at the top and bottom of both sides of the limit rod, and a cylindrical chamber is provided inside the tube body, a dial wheel is movably connected at the end of the tube body, a screw rod is movably connected between the cylindrical chamber and the dial wheel, and the outer surface of the screw rod is provided with a spiral pattern, a nut is sleeved on the outer side of the spiral pattern, a slider is fixed to the side outside the spiral pattern, and a slide groove is respectively provided on the upper and lower sides of the outer surface of the shell.

[0007] Preferably, the screw rod is embedded in a circular groove, and the texture of the inner wall of the nut matches the spiral texture.

[0008] Preferably, the slider is embedded in a slide groove, and the screw rod can be vertically lifted and lowered along with the slider.

[0009] Preferably, an outer frame is fixed at the lower part of the exterior of the shell, a metal sheet is fixed at the bottom of the inner frame, a screw is movably connected between the two sides of the lower part of the outer frame, and connecting pieces are respectively sleeved on the two sides of the outside of the screw, a threaded groove is provided between the two sides of the bottom of the connecting piece, an electric wire is fixed to the bottom of the connecting piece, a cover is provided at the bottom of the outer frame, and screw holes are respectively provided on the cover and the two sides of the lower part of the outer frame, bolts are longitudinally assembled between the screw holes, a gathering harness is fixed between the electric wire and the cover, and a connector is fixed at the bottom of the gathering harness, and a cover block is movably connected to the right side of the bottom of the connector.

[0010] Preferably, the connecting piece is connected to the metal sheet by snap-fitting, and the screw is embedded between the transverse thread grooves.

[0011] Preferably, the electric wires are embedded in the gathered wire harness and are connected to the connector, and the bolts can lock the cover to the bottom of the outer frame.

[0012] Preferably, a limit plate is fixedly connected between the inner frame and the PTC ceramic sheet at the upper and lower parts, and a card slot is arranged at the rear of the limit plate.

[0013] Preferably, the card slot is attached to the outer side of the PTC ceramic sheet, and the limiting plate can slide back and forth along the inner wall of the inner frame.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the low-voltage starting PTC heating element for new energy vehicles not only prevents the ceramic sheet from being damaged and realizes rapid circuit connection, but also prevents the ceramic sheet from being dislodged from its original position;

[0015] (1) After fixing the PTC ceramic sheet, the limit rod is first inserted into the positioning socket at the center horizontally, and the two sets of tube bodies are fixed at the upper and lower positions on both sides of the limit rod. Then, the shielding rod is inserted between the side sockets, and the thumbwheels assembled on the two sets of tube bodies are turned. Since the inner wall of the thumbwheel is provided with a groove body that matches the spiral pattern on the outer side of the screw rod, when the slider is restricted by the slide groove, the screw rod can be pushed out of the tube body and embedded in the circular groove. After the nut is put on, it can be locked and reinforced to protect the internal PTC ceramic sheet and aluminum tube on the outside of the shell;

[0016] (2) By fixing an outer frame at the lower part of the outer shell, the wires are gathered in the bundle and connected to the connector, and then the bolts on both sides can be turned, and the cover and the outer frame can be assembled between the screw holes on both sides. The exposed screw part can be rotated manually to push the connecting pieces with threaded grooves on both sides to engage and lock the metal pieces, thereby connecting the circuit. The operation is simple and can prevent the assembly components from loosening, and the current can be quickly connected or cut off in a short period of time;

[0017] (3) By clamping and fixing the limiting plate between the upper and lower parts of the inner frame and the PTC ceramic sheet, the limiting plate with the slot is inserted along the inner wall of the inner frame according to the direction of the PTC ceramic sheet folded in the inner frame, so that each piece of material of the PTC ceramic sheet is embedded in the slot, and then the limiting rod and the shielding rod on the outside are used to limit and protect the PTC ceramic sheet, so as to prevent the ceramic sheet from moving out of its original position and also to prevent the material of the PTC heating element from being broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present utility model;

[0019] Figure 2 This is a schematic diagram of the front cross-sectional structure of the tube body of the present invention;

[0020] Figure 3 This is a schematic diagram of the front cross-sectional structure of the outer frame of the present invention;

[0021] Figure 4 This is a front view structural diagram of the inner frame of the present invention.

[0022] In the figure: 1. Shell; 2. Inner frame; 3. PTC ceramic plate; 4. Tube; 5. Limit rod; 6. Cylindrical chamber; 7. Screw; 8. Pulley; 9. Nut; 10. Limit plate; 11. Slot; 12. Aluminum tube; 13. Side jack; 14. Shielding rod; 15. Circular groove; 16. Positioning jack; 17. Outer frame; 18. Cover; 19. Bolt; 20. Screw hole; 21. Wire; 22. Gathering wire harness; 23. Connector; 24. Cover block; 25. Screw; 26. Threaded groove; 27. Connecting piece; 28. Metal sheet; 29. ​​Slide groove; 30. Slider; 31. Spiral pattern. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figure 1-4A low-voltage starting PTC heating element for new energy vehicles includes a shell 1 and an inner frame 2. Four sets of inner frames 2 are fixed on the inside of the shell 1, and aluminum tubes 12 are fixedly connected between the outer sides of the inner frames 2. PTC ceramic pieces 3 are fixed between the upper and lower parts of the inner frame 2. Side sockets 13 are respectively provided at the upper and lower positions of the inner walls on both sides of the shell 1, and shielding rods 14 are horizontally inserted between the inner sides of the side sockets 13. Circular grooves 15 are respectively provided on both sides of the shielding rods 14. Positioning sockets 1 are respectively provided at the center of the inner walls on both sides of the shell 1. 6, and a limit rod 5 is horizontally inserted between the interior of the positioning socket 16, the top and bottom of both sides of the limit rod 5 are respectively fixed with a tube body 4, and a cylindrical chamber 6 is provided inside the tube body 4, and a dial wheel 8 is movably connected at the end of the tube body 4, and a screw rod 7 is movably connected between the cylindrical chamber 6 and the dial wheel 8, and the outer surface of the screw rod 7 is provided with a spiral pattern 31, the outer side of the spiral pattern 31 is sleeved with a nut 9, and a slider 30 is fixed to the side outside the spiral pattern 31, and a slide groove 29 is respectively provided on the upper and lower sides of the outer surface of the shell 1;

[0025] The screw rod 7 is embedded in the circular groove 15, the lines on the inner wall of the nut 9 match the spiral lines 31, and the slider 30 is embedded in the slide groove 29. The screw rod 7 can be vertically raised and lowered along with the slider 30;

[0026] Specifically, if Figure 1 and Figure 2 As shown, after fixing the PTC ceramic piece 3, first insert the limit rod 5 horizontally into the positioning hole 16 at the center, fix the two groups of tube bodies 4 at the upper and lower positions on both sides of the limit rod 5, and then insert the blocking rod 14 between the side holes 13, turn the dial 8 assembled on the two groups of tube bodies 4. Since the inner wall of the dial wheel 8 is provided with a groove body that matches the external spiral pattern 31 of the screw rod 7, when the slider 30 is restricted by the slide groove 29, the screw rod 7 can be pushed out of the tube body 4 and embedded in the circular groove 15. After putting on the nut 9, it can be locked and reinforced to protect the internal PTC ceramic piece 3 and aluminum tube 12 on the outside of the shell 1.

[0027] Embodiment 2: An outer frame 17 is fixed to the lower part of the exterior of the shell 1, a metal sheet 28 is fixed to the bottom of the inner frame 2, a screw 25 is movably connected between the two sides of the lower part of the outer frame 17, and a connecting piece 27 is respectively sleeved on both sides of the outer side of the screw 25, a threaded groove 26 is provided between the two sides of the bottom of the connecting piece 27, a wire 21 is fixed to the bottom of the connecting piece 27, a cover body 18 is provided at the bottom of the outer frame 17, and screw holes 20 are respectively provided on the cover body 18 and the two sides of the lower part of the outer frame 17, bolts 19 are longitudinally assembled between the screw holes 20, a gathering harness 22 is fixed between the wire 21 and the cover body 18, and a connector 23 is fixed to the bottom of the gathering harness 22, and a cover block 24 is movably connected to the right side of the bottom of the connector 23;

[0028] The connecting piece 27 is connected to the metal piece 28 by snapping, the screw 25 is embedded between the transverse thread grooves 26, the wire 21 is embedded in the gathering wire harness 22 and connected to the connector 23, and the bolt 19 can lock the cover 18 to the bottom of the outer frame 17;

[0029] Specifically, if Figure 1 and Figure 3 As shown, after the wires 21 are gathered into the bundled wiring harness 22 and connected to the connector 23, the bolts 19 on both sides can be tightened to assemble the cover 18 and the outer frame 17 between the screw holes 20 on both sides. The exposed screw 25 can be manually rotated to push the connecting piece 27 with the threaded groove 26 on both sides to engage and lock the metal piece 28, thereby completing the circuit. The operation is simple and prevents the assembly components from loosening.

[0030] Example 3: A limit plate 10 is fixedly connected between the inner frame 2 and the PTC ceramic plate 3, and a slot 11 is arranged at the rear of the limit plate 10. The slot 11 fits on the outer side of the PTC ceramic plate 3, and the limit plate 10 can slide back and forth along the inner wall of the inner frame 2;

[0031] Specifically, if Figure 1 and Figure 4 As shown, according to the direction of the folded PTC ceramic sheet 3 in the inner frame 2, the limiting plate 10 with the card slot 11 is inserted along the inner wall of the inner frame 2, so that each piece of material of the PTC ceramic sheet 3 is embedded in the card slot 11, and then cooperated with the outer limiting rod 5 and the shielding rod 14 to limit and protect the PTC ceramic sheet 3 to prevent the ceramic sheet 3 from moving out of its original position.

[0032] Working principle: When using the utility model, first, according to the direction of the folded PTC ceramic sheet 3 in the inner frame 2, the limiting plate 10 with the card slot 11 is inserted along the inner wall of the inner frame 2, so that each piece of material of the PTC ceramic sheet 3 is embedded in the card slot 11, and then the outer limiting rod 5 and the shielding rod 14 are used to limit and protect the PTC ceramic sheet 3. After fixing the PTC ceramic sheet 3, the limiting rod 5 is first inserted horizontally into the positioning hole 16 at the center, and the two sets of tubes 4 are fixed at the upper and lower positions on both sides of the limiting rod 5. Then, the shielding rod 14 is inserted between the side holes 13, and the dial 8 assembled on the two sets of tubes 4 is turned. Because the inner wall of the dial wheel 8 is provided with a groove body that matches the external spiral pattern 31 of the screw rod 7, when the slider 30 is restricted by the slide groove 29, the screw rod 7 can be pushed out of the tube body 4 and embedded in the circular groove 15. After the nut 9 is put on, it can be locked and reinforced. Finally, the wires 21 are gathered in the gathering harness 22 and connected to the connector 23. Then, the bolts 19 on both sides can be screwed, and the cover body 18 and the outer frame 17 can be assembled between the screw holes 20 on both sides. The exposed part of the screw rod 25 can be manually rotated to push the connecting piece 27 with the threaded groove 26 on both sides to engage and lock the metal piece 28, thereby connecting the circuit. The operation is simple and can prevent the assembly components from loosening.

Claims

1. A low-voltage starting PTC heating element for new energy vehicles, comprising a housing (1) and an inner frame (2), characterized in that: Four groups of inner frames (2) are fixed on the inner side of the shell (1), and aluminum tubes (12) are fixedly connected between the outer sides of the inner frames (2), and PTC ceramic sheets (3) are fixed between the upper and lower parts of the inner frames (2). Side plug holes (13) are respectively provided at the upper and lower positions of the inner walls on both sides of the shell (1), and shielding rods (14) are transversely inserted between the insides of the side plug holes (13). Circular grooves (15) are respectively provided on both sides of the shielding rods (14). Positioning plug holes (16) are respectively provided at the centers of the inner walls on both sides of the shell (1), and the insides of the positioning plug holes (16) are transversely inserted between the limited The limiting rod (5) is fixed with a tube body (4) at the top and bottom of both sides of the limiting rod (5), and a cylindrical chamber (6) is provided inside the tube body (4). A thumb wheel (8) is movably connected at the end of the tube body (4), a screw rod (7) is movably connected between the cylindrical chamber (6) and the thumb wheel (8), and a spiral pattern (31) is provided on the outer surface of the screw rod (7), a nut (9) is sleeved on the outer side of the spiral pattern (31), and a slider (30) is fixed on the side outside the spiral pattern (31), and a slide groove (29) is provided on the upper and lower sides of the outer surface of the shell (1).

2. A low-voltage starting PTC heating element for new energy vehicles according to claim 1, characterized in that: The screw rod (7) is embedded in the circular groove (15), and the texture of the inner wall of the nut (9) matches the spiral texture (31).

3. The low-voltage starting PTC heating element for new energy vehicles according to claim 1, characterized in that: The slider (30) is embedded in the slide groove (29), and the screw rod (7) can be vertically lifted and lowered along with the slider (30).

4. The low-voltage starting PTC heating element for new energy vehicles according to claim 1, characterized in that: An outer frame (17) is fixed at the lower part of the outer shell (1), a metal sheet (28) is fixed at the bottom of the inner frame (2), a screw rod (25) is movably connected between the two sides of the lower part of the outer frame (17), and a connecting piece (27) is respectively sleeved on the two sides of the outer part of the screw rod (25), a threaded groove (26) is provided between the two sides of the bottom of the connecting piece (27), an electric wire (21) is fixed at the bottom of the connecting piece (27), a cover body (18) is provided at the bottom of the outer frame (17), and screw holes (20) are respectively provided on the two sides of the lower part of the cover body (18) and the outer frame (17), bolts (19) are longitudinally assembled between the screw holes (20), a gathering harness (22) is fixed between the electric wire (21) and the cover body (18), and a joint (23) is fixed at the bottom of the gathering harness (22), and a cover block (24) is movably connected to the right side of the bottom of the joint (23).

5. The low-voltage starting PTC heating element for new energy vehicles according to claim 4, characterized in that: The connecting piece (27) is connected to the metal piece (28) by snapping, and the screw rod (25) is embedded between the transverse thread grooves (26).

6. The low-voltage starting PTC heating element for new energy vehicles according to claim 4, characterized in that: The electric wires (21) are embedded in the gathering wire harness (22) and are connected to the connector (23), and the bolts (19) can lock the cover (18) to the bottom of the outer frame (17).

7. The low-voltage starting PTC heating element for new energy vehicles according to claim 1, characterized in that: A limiting plate (10) is fixedly engaged between the inner frame (2) and the PTC ceramic sheet (3) at the top and bottom, and a card slot (11) is arranged at the rear of the limiting plate (10).

8. The low-voltage starting PTC heating element for new energy vehicles according to claim 7, characterized in that: The clamping groove (11) is fitted on the outer side of the PTC ceramic sheet (3), and the limiting plate (10) can slide back and forth along the inner wall of the inner frame (2).

Images