CN217902821U - Automobile fan speed regulation resistor - Google Patents

Abstract

The utility model relates to an automobile fan speed regulation resistor, which comprises a shell component and a core component arranged in the shell component, wherein the shell component comprises a front cover and a rear cover, the core component comprises a mounting plate, a resistor body and lead-out pins are arranged on the mounting plate, and the resistor body and the lead-out pins are clamped by dislocation of wiring holes; the periphery of the resistor body is wrapped by an asbestos net, heat dissipation pieces are arranged on the periphery of the asbestos net, a plurality of mounting grooves are formed in the inner wall of the front cover, the heat dissipation pieces are located through the mounting grooves, a plurality of first heat dissipation ribs are arranged on the outer surface of the front cover, and a plurality of second heat dissipation ribs are arranged on the outer surface of the rear cover. The utility model discloses beneficial effect does: according to the automobile fan speed regulation resistor, a traditional welding mode is omitted between the resistor body and the lead-out pins, various irreversible welding defects caused by welding can be effectively avoided, and the automobile fan speed regulation resistor is convenient to install and maintain; the heat dissipation effect is good, and the radiating efficiency is high to the adaptation is worked for a long time under continuous high temperature environment.

Description

Automobile fan speed regulation resistor

Technical Field

The utility model relates to a speed governing resistance technical field, concretely relates to car fan speed governing resistance.

Background

The automobile fan speed regulating resistor is usually connected in series into an automobile air conditioner fan speed regulating circuit, and the passing current of the motor is reduced through the voltage division effect of the resistor, so that the rotating speed of the fan is reduced, and the rotating speed of the fan is regulated. An existing automobile fan speed regulation resistor, for example, a patent document with a publication number of "CN204720266U" discloses a metal-shell multi-gear speed regulation resistor for an automobile air conditioner, which includes a shell assembly and a core assembly, wherein the core assembly generally includes at least two resistor bodies, a plurality of lead-out soldering lugs and a thermal fuse, each resistor body is connected in series and wound on a porcelain, the lead-out soldering lugs are arranged at two ends of each resistance wire to be connected, the lead-out soldering lugs are fixed on the porcelain through curing of a first filler, and the porcelain is fixed in the core assembly through curing of a second filler and a third filler. Different lead-out soldering lugs are connected, resistor bodies with different numbers of resistance values are connected in series in the circuit, so that the resistance is changed, and the circuit current is further changed, so that the rotating speed of the motor is controlled.

However, this solution has the following problems: firstly, a lead-out soldering lug is fixed on a porcelain piece through first filler in a curing mode, the two ends of a resistor body are connected with the lead-out soldering lug by welding, and once welding defects such as welding errors occur during production, particularly after the welding defects occur, the welding defects are irreversible, the rejection rate of products can be generally only recovered and then welded again; secondly, the connection between the resistor body, the thermal fuse and the lead-out soldering lug cannot be easily disassembled due to welding, once the conditions such as resistor body breakage, thermal fuse overheating fusing (the thermal fuse is used as a disposable electronic element and is difficult to recover after overheating fusing) and the like occur, the maintenance cannot be carried out by replacing the resistor body, and the whole speed regulating resistor needs to be replaced at the moment, so that the waste of resources to a certain extent is caused; third, above-mentioned technical scheme's inside porcelain spare passes through the second and packs, the third packs to pack the solidification in shell subassembly, lacks radiating structure, and the heat can be in the inside accumulation of speed governing resistance, causes easily that the filler inflation damages shell subassembly or causes the overheated temperature fuse that makes of speed governing resistance to work in advance, and shell subassembly surface is level and smooth, and is little with the area of contact of air, also can lead to the radiating effect not good, is difficult to work for a long time under the higher environment of temperature.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to provide a speed-regulating resistor for a blower of an automobile, wherein the resistor body is connected to the first leading-out pin by a staggered clamping manner of two sets of wiring holes, so that various irreversible welding defects caused by welding can be effectively avoided, and the resistor body can be replaced and maintained by being conveniently disassembled if necessary; the heat dissipation structure is arranged and has an effective heat dissipation structure, the heat dissipation effect is good, and the heat dissipation structure can adapt to work for a long time in a continuous high-temperature environment.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides an automobile fan speed governing resistance, includes shell subassembly, sets up the core subassembly in shell subassembly, shell subassembly is including protecgulum and hou gai, the core subassembly is including the mounting panel, be equipped with a plurality of resistive elements, a plurality of feet of drawing forth on the mounting panel, its characterized in that: the leading pins comprise first leading pins which are arranged at two ends of each resistor body; first pin extraction one end is equipped with one end and first pin extraction articulated swing piece, be equipped with first wiring hole on the first pin extraction, swing piece middle part is equipped with second wiring hole, when the swing piece is in a certain position, first wiring hole can be with the axle center setting with second wiring hole, and the other end of each swing piece articulates there is the connecting rod, the linkage of connecting rod one end has stop gear.

By adopting the technical scheme, the mounting plate is provided with the plurality of resistor bodies and the plurality of leading-out pins, and the resistor bodies with different resistance values are connected into the speed regulating circuit by connecting different leading-out pins, so that the current of the speed regulating circuit is changed, and the rotating speed of the fan is regulated. Particularly, one end of the swinging block is hinged with a first leading-out pin, a first wiring hole is formed in the first leading-out pin, and a second wiring hole is formed in the middle of the swinging block. The connecting rod is hinged with each swinging block, the control of each swinging block is realized through the movement of the connecting rod, when the resistor body is connected with the first leading-out pin, the swinging block can be rotated by a certain angle through the connecting rod, when the swinging block is positioned at a certain position, the first wiring hole and the second wiring hole can be coaxially arranged, so that the connecting wires at two ends of the resistor body can pass through the first wiring hole and the second wiring hole, then the swinging block is rotated, because one end of the swinging block is hinged with the first leading-out pin, and the second wiring hole is arranged in the middle of the swinging block, the hinged central axis of the swinging block and the axis of the second wiring hole are not in the same straight line, when the swinging block rotates around the hinged central axis, the first wiring hole and the second wiring hole are staggered, the gap between the first wiring hole and the second wiring hole is reduced, so that the connecting wires at two ends can be clamped, further, the swinging block can be continuously rotated, the connecting wires at two ends are deformed to a certain degree, and the swinging block is prevented from rotating under the effect of no external force by the swinging block, so that the connecting wires at two ends are separated from the first wiring hole, and the resistor body, thereby ensuring the stability of the connection of the resistor body. Therefore, the utility model discloses when can guarantee to be connected stably between first pin and the resistive element, avoid among the traditional technical scheme various welding defect that adopt welded mode to probably appear between first pin and the resistive element.

The limiting mechanism specifically comprises: the limiting mechanism comprises an extension spring, one end of the extension spring is connected with the inner wall of the shell component, the other end of the extension spring is provided with a barb which can be connected with the buckle, and one end of the connecting rod is provided with the buckle which can be matched with the barb.

After the swinging block rotates by a certain angle through the connecting rod, the connecting wires at two ends of the resistor body are clamped, the buckle at one end of the connecting rod is connected with the barb of the extension spring, and the extension spring is stretched to generate a reaction force to limit the connecting rod, so that the connecting rod is prevented from driving the swinging block to rotate reversely, and the stable connection between the resistor body and the first leading-out pin is ensured. The extension spring can be further stretched under the action of external force, and at the moment, the barb and the ring buckle can be detached, so that the swinging block can reversely rotate by moving the connecting rod, the gap between the first wiring hole and the second wiring hole can be increased, the connecting wires at two ends of the resistor body can be restored, the resistor body can be conveniently separated from the first leading-out pin, the resistor body inside the speed regulation resistor can be directly replaced when replaced or maintained, the whole speed regulation resistor does not need to be replaced, and the resource waste caused by replacing the whole speed regulation resistor is avoided. The event the utility model discloses in, the resistive element is detachable the connection with being connected of first pin-out, can guarantee promptly that the two connects stably, also can be when necessary convenient to detach, changes and maintains the resistive element to when the installation error appears, also can correct and install again, reduce the product disability rate.

The speed regulation resistor of the automobile fan can be further set as follows: the pin is drawn forth still including the second, still be equipped with temperature fuse on the mounting panel, temperature fuse one end is connected with a first pin of drawing forth, and the other end is drawn forth the pin with the second and is connected, the temperature fuse periphery is equipped with first asbestos gauge.

Adopt above-mentioned technical scheme, the temperature fuse who sets up is used for the utility model discloses in time cut-off circuit when overheated avoids burning out, and the temperature fuse periphery is equipped with first asbestos gauge, but each corner on first asbestos gauge is arrived with the heat homodisperse that temperature fuse produced, can play the effect of avoiding heat concentration, prevents that temperature fuse from working in advance.

The speed regulation resistor of the automobile fan can be further set as follows: the second is drawn forth and is equipped with third wiring hole on the foot, be equipped with fourth wiring hole on the connecting rod, when first wiring hole and second wiring hole are with the axle center setting, third wiring hole also is with the axle center setting with fourth wiring hole.

Adopt above-mentioned technical scheme, the utility model discloses a temperature fuse can change after work, and the security obtains improving. The thermal fuse is a disposable electronic component, i.e. after being fused by overheating, the thermal fuse cannot be fused for the second time. And particularly, two ends of the temperature fuse are respectively connected with a first lead-out pin and a second lead-out pin. Firstly, when a resistor body and a temperature fuse are installed, a connecting rod is moved to enable a swinging block to rotate for a certain angle, when the swinging block is located at a certain position, a first wiring hole and a second wiring hole can be coaxially arranged, at the moment, a connecting wire at one end of the resistor body and a connecting wire at one end of the temperature fuse can both pass through the first wiring hole and the second wiring hole, at the moment, a third wiring hole arranged on a second pin and a fourth wiring hole arranged on the connecting rod are coaxially arranged, and a connecting wire at the other end of the temperature fuse passes through the third wiring hole and the fourth wiring hole; then, the connecting rod is moved to enable the buckles on the connecting rod to be connected with the barbs of the extension springs to limit the swing block, at the moment, dislocation occurs between the third wiring hole and the fourth wiring hole, so that the connecting line at the other end of the temperature fuse is clamped, deformation of the connecting line is enabled to occur, and the connecting line at the other end of the temperature fuse is guaranteed to be stably connected with the second leading-out pin. Therefore, the resistor body and the temperature fuse can avoid various welding defects caused by welding, the resistor body and the temperature fuse can be replaced, particularly, after the thermal fuse of disposable electronic elements such as the temperature fuse is overheated, the replaced temperature fuse can ensure that the speed regulating resistor has the overheating protection function again, and the safety is improved.

Foretell car fan speed governing resistance can further set up to: and the first leading-out pin and the second leading-out pin are provided with limiting clips for preventing the first leading-out pin and the second leading-out pin from being separated from the mounting plate.

By adopting the technical scheme, the limiting clamp can prevent the first lead-out pin and the second lead-out pin from being separated from the mounting plate, the stability of connection between the first lead-out pin and the mounting plate and the stability of connection between the second lead-out pin and the mounting plate are ensured, and the first lead-out pin or the second lead-out pin is prevented from loosening from the mounting plate when the movable connecting rod is used for limiting the resistor body and the temperature fuse.

The speed regulation resistor of the automobile fan can be further set as follows: the resistor body periphery parcel second asbestos gauge, second asbestos gauge periphery is equipped with the radiating piece, the radiating piece is including the bottom plate with second asbestos gauge periphery laminating, set up the fin on the bottom plate, the protecgulum inner wall is equipped with a plurality of mounting grooves, fin one end gomphosis is in the mounting groove, the protecgulum surface is located and is equipped with a plurality of first heat dissipation muscle of group with the mounting groove corresponding position department.

Adopt above-mentioned technical scheme, make the utility model discloses good radiating effect has. The utility model discloses it has the second asbestos gauge to wrap up in the resistive element periphery, the second asbestos gauge can be with each corner on the second asbestos gauge of the even dispersion of heat that the resistive element produced, thereby avoid the heat to concentrate, set up the radiating piece in second asbestos gauge periphery, the radiating piece can choose the material that thermal conductivity is good to make for use, the radiating piece of preferred copper material to make, because the second asbestos gauge has good insulating properties originally, laminate the bottom plate of radiating piece with second asbestos gauge periphery, can avoid the electric current on the resistive element to flow to the radiating piece, the second asbestos gauge still plays insulating effect, the security performance is improved, the fin of radiating piece is embedded into the mounting groove of protecgulum and is fixed a position, the heat of dispersing to each corner of second asbestos gauge is absorbed by the bottom plate of radiating piece fast, and transmit to the protecgulum through the fin; the first heat dissipation ribs are arranged on the outer surface of the front cover at positions corresponding to the mounting grooves, so that the surface area of the front cover is increased, and the heat transferred by the heat dissipation fins can be quickly dissipated; therefore, the utility model can work in the environment with higher temperature for a long time.

The speed regulation resistor of the automobile fan can be further set as follows: the outer surface of the rear cover is provided with a plurality of second heat dissipation ribs, and the first heat dissipation ribs and the second heat dissipation ribs are vertically arranged.

By adopting the technical scheme, the second heat dissipation ribs arranged on the rear cover are also beneficial to increasing the surface area of the rear cover and are also beneficial to heat dissipation; and first heat dissipation muscle is perpendicular with the second heat dissipation muscle and arranges, and the concrete optimization is, and the first heat dissipation muscle of protecgulum is vertical distribution, and the second heat dissipation muscle of back lid is the horizontal distribution, and two sets of heat dissipation muscle are not equidirectional and arrange, dispel the heat to all directions, are favorable to improving the radiating efficiency.

The speed regulation resistor of the automobile fan can be further set as follows: still be equipped with the arch that a plurality of top surfaces are in the coplanar on the mounting panel, the bottom of arch and protecgulum and the bottom of back lid are conflict and are connected.

Adopt above-mentioned technical scheme, the arch that sets up on the mounting panel is contradict with the bottom of protecgulum and the bottom of back lid and is connected, and during the installation, there is certain clearance to supply the circulation of air between the bottom of protecgulum and back lid and the mounting panel, further optimizes the radiating efficiency.

The beneficial effects of the utility model are that: the traditional welding mode is cancelled among the resistor body, the temperature fuse and the leading-out pin, so that various irreversible welding defects caused by welding can be effectively avoided; when necessary, the extension spring is extended through external force, the connection between the connecting rod and the extension spring is disconnected, the disassembly is convenient, and the resistor body and the temperature fuse can be replaced and maintained; the periphery of the resistor body and the periphery of the temperature fuse are wrapped with the asbestos meshes, the asbestos meshes can uniformly disperse heat to all corners on the asbestos meshes, so that heat concentration is avoided, the periphery of the second asbestos meshes outside the resistor body is provided with the heat radiating parts, the asbestos meshes have good insulating property, so that current on the resistor body can be prevented from flowing to the heat radiating parts, the second asbestos meshes also play an insulating role, and the safety performance is improved; the radiating fins of the radiating piece are embedded into the mounting groove of the front cover for positioning, and the first radiating ribs are arranged on the outer surface of the front cover at positions corresponding to the mounting groove, so that the surface area of the front cover is increased, and the heat transmitted by the radiating fins can be quickly radiated; similarly, the second heat dissipation ribs arranged on the rear cover are also beneficial to increasing the surface area of the rear cover and also beneficial to heat dissipation; the arch that sets up on the mounting panel is contradicted with the bottom of protecgulum and the bottom of back lid and is connected, during the installation, has certain clearance can supply the circulation of air between the bottom of protecgulum and back lid and the mounting panel, further optimizes the radiating efficiency.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a schematic view of the inner wall structure of the front cover of the present invention;

FIG. 4 is a schematic view of the rear cover structure of the present invention;

fig. 5 is a schematic view of the core assembly without the front cover according to the present invention;

fig. 6 is an exploded view of the first pin, the second pin and the connecting rod of the present invention;

FIG. 7 is an enlarged view of the structure at A in FIG. 6;

FIG. 8 is a schematic view of the link in its initial position;

FIG. 9 is a schematic view of the linkage in the locked position;

fig. 10 is a schematic structural view of the first pin and the second pin of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 10, the speed regulation resistor for the automobile fan comprises a shell component 1 and a core component 2, wherein the shell component 1 comprises a front cover 11 and a rear cover 12, the core component 2 comprises a mounting plate 21, a plurality of resistor bodies 22, a plurality of leading-out pins and a temperature fuse 24 are arranged on the mounting plate 21, a second asbestos gauze 3 is wrapped on the periphery of each resistor body, a first asbestos gauze 4 is wrapped on the periphery of the temperature fuse 24, and the heat generated by the resistor bodies 22 and the temperature fuse 24 can be uniformly dispersed to all corners of the asbestos gauzes through the two asbestos gauzes, so that the heat concentration is avoided. The heat dissipation member 5 is arranged on the periphery of the second asbestos wire 3, the heat dissipation member 5 comprises a bottom plate 51 attached to the periphery of the second asbestos wire 3 and a heat dissipation sheet 52 arranged on the bottom plate 51, the heat dissipation member 5 can be made of a material with good heat conduction performance, preferably a copper material, and because the first asbestos 3 wire has good insulation performance, the bottom plate 51 of the heat dissipation member 5 is attached to the periphery of the second asbestos wire 3, so that current on the resistor 22 can be prevented from flowing to the heat dissipation member 5, and the second asbestos wire 3 also plays an insulation role, and the safety performance is improved.

The inner wall of the front cover 11 is provided with a plurality of mounting grooves 111, one end of the radiating fin 52 is embedded in the mounting grooves 111, heat dispersed to each corner of the second asbestos gauge 3 is quickly absorbed by the bottom plate 51 of the radiating member 5 and is transmitted to the front cover 11 through the radiating fin 52, so that air in a cavity between the front cover 11 and the rear cover 12 is prevented from being heated, and the air expansion is prevented from generating large pressure on the front cover 11 or the rear cover 12. A plurality of first heat dissipation ribs 112 are arranged on the outer surface of the front cover 11 at positions corresponding to the mounting grooves 111, and a plurality of second heat dissipation ribs 121 are arranged on the outer surface of the rear cover 12; both the two kinds of heat dissipation ribs can increase the surface area of the housing assembly 1 in contact with air, thereby facilitating heat dissipation of the housing assembly 1. Two sets of muscle that loose arrange the mode difference, are favorable to high-efficient heat dissipation. The mounting plate 21 is further provided with a plurality of protrusions 211 with top surfaces in the same plane, and the protrusions 211 are in abutting connection with the bottom of the front cover 11 and the bottom of the rear cover 12. So that a certain gap exists between the bottom of the shell assembly 1 and the mounting plate 21, and the gap is also beneficial to heat dissipation of the shell assembly 1, thereby further improving the heat dissipation efficiency.

Therefore the utility model discloses the radiating effect is good, and the radiating efficiency is fast, and can work under the higher environment of temperature is long.

The leading-out pins comprise a first leading-out pin 23 and a second leading-out pin 28; first lead pins 23 are provided at both ends of each resistor 22; in this embodiment, the resistive element 22 is a resistance wire, and two resistance wires are provided, 22a and 22b respectively; the first leading-out pins 23 are provided with three, 23a, 23b and 23c in sequence, and are respectively arranged at two ends and in the middle of the mounting plate 21, as shown in fig. 2. The first lead-out leg 23 arranged in the middle is connected with the two resistance wires, so that the two resistance wires are connected in series. When the circuit is connected with different groups of first leading-out pins 23, resistors with different resistance values are connected in the circuit, so that the circuit current is changed, and the rotating speed of the motor is adjusted. For example, when the circuit is connected with 23a and 23b of the first leading-out pin 23, the resistance value of the access circuit is determined by 22a, and when the circuit is connected with 23a and 23c of the first leading-out pin 23, the access resistance value is determined by 22a and 22b together, and so on, the resistance value in the access circuit is changed, so that the current in the circuit is changed, the rotating speed of the fan is controlled, and the speed regulation is realized. When the resistance of the access circuit is increased, the circuit is correspondingly reduced, so that the rotating speed of the fan is reduced; when the resistance of the access circuit is reduced, the current is correspondingly increased, and the rotating speed of the fan is increased.

Particularly, one end of the first pin 23 is provided with a swing block 25 having one end hinged to the first pin 23, the first pin 23 is provided with a first wiring hole 231 (one side of the first pin 23 located at the first wiring hole 231 is a hinge hole for being hinged to the swing block 25), the middle of the swing block 25 is provided with a second wiring hole 251, the other end of each swing block 25 is hinged to a link 26 (as shown in fig. 7, holes at two sides of the second wiring hole 251 on the swing block 25 are hinge holes, one of the hinge holes is used for being hinged to the first pin 23, the other hinge hole is used for being hinged to the link 26), one end of the link 26 is linked with a limiting mechanism, the limiting mechanism comprises an extension spring 27, the link 26 is hinged to each swing block 25, one end of the link 26 is provided with a ring buckle 261 movably arranged at one end of the link 26, one end of the extension spring 27 is fixedly connected to the inner wall of the housing assembly 1, and the other end is provided with a barb 271 capable of being connected to the ring buckle 261.

And one end of the thermal fuse 24 is connected with 23a of the first pin 23, and the other end is connected with the second pin 28, in this embodiment, the first pin 23 and the second pin 28 have similar structures, except that the second pin 28 is not provided with a hinge hole, the second pin 28 is provided with a third wiring hole 281, and the connecting rod 26 is provided with a fourth wiring hole 262. The opening positions of the first wiring hole 231, the second wiring hole 251, the third wiring hole 281 and the fourth wiring hole 262 meet the following conditions: when the swing block 25 is at a certain position, the first wiring hole 231 may be coaxially disposed with the second wiring hole 251, and the third wiring hole 281 and the fourth wiring hole 262 may be coaxially disposed at this time.

When the resistor 22 and the thermal fuse 24 are installed, the swinging block 25 is rotated by a certain angle through the connecting rod 26, when the swinging block 25 is at a certain position, the first wiring hole 231 and the second wiring hole 251 can be coaxially arranged, and the position is taken as the initial position of the connecting rod 26, as shown in fig. 8, the connecting wires at two ends of the resistor 22 and the connecting wire at one end of the thermal fuse 24 can both pass through the first wiring hole 231 and the second wiring hole 251, and at this time, the third wiring hole 281 and the fourth wiring hole 262 are also coaxially arranged, and the connecting wire at the other end of the thermal fuse 24 passes through the third wiring hole 281 and the fourth wiring hole 262; then, the link 26 is moved to make the ring buckle 261 on the link 26 connect with the barb 271 of the extension spring 27, on one hand, since one end of the swing block 25 is hinged with the link 26, the link 26 will drive the swing block 25 to rotate, and the other end of the swing block 25 is hinged with the first leading-out pin 23, the second wiring hole 251 is arranged in the middle of the swing block 25, therefore, the hinge central axis of the swing block 25 and the axis of the second wiring hole 251 are not on the same straight line, when the swing block 25 rotates around the hinge central axis, the first wiring hole 231 and the second wiring hole 251 are dislocated, and the gap between the first wiring hole 231 and the second wiring hole 251 can be reduced, thereby clamping the connecting wires at the two ends of the resistor 22 and the connecting wire at one end of the thermal fuse 24; on the other hand, moving the link 26 also causes the third wire connecting hole 281 to be misaligned with the fourth wire connecting hole 262, thereby clamping the connecting wire at the other end of the thermal fuse 24. Further, the connecting rod 26 can be moved further to rotate the swing block 25, so that the connecting wire is deformed to some extent. When the ring buckle 261 on the connecting rod 26 is connected with the barb 271 of the extension spring 27, the connecting rod 26 can be prevented from rotating without external force, and the connecting wires at the two ends of the resistor 22 and the connecting wires of the thermal fuse 24 are prevented from being separated from the leading pins, so that the stability of connection is ensured, and the connecting rod 26 is positioned at the locking position, as shown in fig. 9. In order to prevent the first pin 23 or the second pin 28 from loosening from the mounting plate when the movable connecting rod 26 limits the resistor 22 and the thermal fuse 24, a limiting clip 29 is provided on the first pin 23 and the second pin 28 to ensure stability.

The extension spring 27 can be further extended by an external force, and at this time, the barb 271 and the buckle 261 can be detached, so that the swing block 25 can reversely rotate by moving the link 26, and the gap between the first wiring hole 231 and the second wiring hole 251 and the gap between the third wiring hole 281 and the fourth wiring hole 262 can be increased, thereby facilitating the separation of the resistor 22 from the first lead-out pin 23 and the separation of the thermal fuse 24 from the first lead-out pin 23 and the second lead-out pin 28.

Therefore, the utility model discloses when can guarantee to be connected stably between pin-out and resistive element 22 and the temperature fuse 24, avoid adopting the various welding defects that welded mode probably appears among the traditional technical scheme. When necessary, convenient to detach, can directly change resistive element 22 and temperature fuse 24 inside speed regulating resistor when changing or maintaining, and need not to change whole speed regulating resistor, avoid changing the wasting of resources that whole speed regulating resistor brought, especially temperature fuse 24 is disposable electronic component, and after the mistake thermal fusing, temperature fuse 24 can't carry out the second fusing, can guarantee again that speed regulating resistor possesses the effect of overheat protection again through temperature fuse 24 of more renew, and the security obtains improving.

Claims (8)

1. The utility model provides an automobile fan speed governing resistance, includes shell subassembly, sets up the core subassembly in shell subassembly, shell subassembly is including protecgulum and hou gai, the core subassembly is including the mounting panel, be equipped with a plurality of resistive elements, a plurality of pins of drawing forth on the mounting panel, its characterized in that: the leading pins comprise first leading pins which are arranged at two ends of each resistor body; first pin extraction one end is equipped with one end and first pin extraction articulated swing piece, be equipped with first wiring hole on the first pin extraction, swing piece middle part is equipped with second wiring hole, when the swing piece is in a certain position, first wiring hole can be with the axle center setting with second wiring hole, and the other end of each swing piece articulates there is the connecting rod, the linkage of connecting rod one end has stop gear.

2. The automobile fan speed regulation resistor of claim 1, characterized in that: the limiting mechanism comprises an extension spring, one end of the extension spring is connected with the inner wall of the shell component, the other end of the extension spring is provided with a barb which can be connected with the buckle, and one end of the connecting rod is provided with a buckle which can be matched with the barb.

3. The automobile fan speed regulation resistor of claim 1, characterized in that: the pin is drawn forth still including the second, still be equipped with temperature fuse on the mounting panel, temperature fuse one end is connected with a first pin of drawing forth, and the other end is drawn forth the pin with the second and is connected, the temperature fuse periphery is equipped with first asbestos gauge.

4. The automobile fan speed regulation resistor of claim 3, characterized in that: the second is drawn forth and is equipped with third wiring hole on the foot, be equipped with fourth wiring hole on the connecting rod, when first wiring hole and second wiring hole are with the axle center setting, third wiring hole also is with the axle center setting with fourth wiring hole.

5. The automobile fan speed regulation resistor of claim 3, characterized in that: and the first leading-out pin and the second leading-out pin are provided with limiting clips for preventing the first leading-out pin and the second leading-out pin from being separated from the mounting plate.

6. The automobile fan speed regulation resistor of claim 1, characterized in that: the resistor body periphery parcel second asbestos gauge, second asbestos gauge periphery is equipped with the radiating piece, the radiating piece is including the bottom plate with second asbestos gauge periphery laminating, set up the fin on the bottom plate, the protecgulum inner wall is equipped with a plurality of mounting grooves, fin one end gomphosis is in the mounting groove, the protecgulum surface is located and is equipped with a plurality of first heat dissipation muscle of group with the mounting groove corresponding position department.

7. The automobile fan speed regulation resistor of claim 6, characterized in that: the outer surface of the rear cover is provided with a plurality of second heat dissipation ribs, and the first heat dissipation ribs and the second heat dissipation ribs are vertically arranged.

8. The automobile fan speed regulation resistor of claim 1, characterized in that: still be equipped with the arch that a plurality of top surfaces are in the coplanar on the mounting panel, the bottom of arch and protecgulum and the bottom of back lid are conflict and are connected.

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