WO2012075945A1

WO2012075945A1 - Flexible connection device and manufacturing method and vehicle electromagnetic fan clutch

Info

Publication number: WO2012075945A1
Application number: PCT/CN2011/083631
Authority: WO
Inventors: 王兆宇; 李小霞; 邢子义
Original assignee: 龙口中宇机械有限公司
Priority date: 2010-12-07
Filing date: 2011-12-07
Publication date: 2012-06-14

Abstract

Disclosed is a flexible connection device which comprises a fan fixing disk (521) and a magnet fixing disk (522), with permanent magnets (255) uniformly distributed on the outer circumference surface of the magnet fixing disk; soft magnets (104) are uniformly provided in the circumference surface of an inner cavity of the disk body of the fan fixing disk in a manner corresponding to the permanent magnets. The magnet fixing disk drives the fan fixing disk to rotate, and the direction of the attractive force from the magnetic field points from the outer circumference surface of the magnet fixing disk to the centre of the disk body of the magnet fixing disk, which thereby causes radial forces acting on respective transmission bearings to counterbalance each other, and achieves a normal rolling state for the cylinder rollers or balls arranged between the inner races and the outer races of the transmission bearings in the disk bodies, so that the problem that the transmission bearings leak lubricating oil/grease due to single side eccentric wear of the cylinder rollers or the balls can be avoided. At the same time, a manufacturing method for the flexible connection device and a vehicle electromagnetic fan clutch using the flexible connection device are provided.

Description

The present invention is claimed by the applicant, the application date is December 07, 2010, the application number is 201010588608.2, and the invention is entitled "Automotive electromagnetic fan clutch" application priority, and the application date is December 2010. On 07th, the application number is 201020659237.8, the invention name is "a car electromagnetic fan clutch" application priority, and the application date is December 27, 2010, the application number is 201010621450.4, the invention name is "with cyclone cooling wind The priority of the application of the magnet fixing plate of the leaf, and the application date is December 27, 2010, the application number is 201020697219.9, and the invention name is "the magnet fixing plate with the cyclone cooling blade". The entire contents of the four applications are hereby incorporated by reference in their entirety. Technical field

The present invention relates to a connecting device, a method of manufacturing the same, and an automotive electromagnetic fan clutch, and more particularly to a connecting device including a permanent magnet and a soft magnet, a method of manufacturing the same, and an automotive electromagnetic fan clutch.

Background technique

For the purpose of the present invention, those skilled in the art can refer to the Chinese patent document, which is entitled "Electromagnetic Fan Clutch for Powerful and Flexible Drive for High Power Heavy Vehicles", and the patent number of the publication "CN101968004A".

In the prior art, the driving connection of the electromagnetic fan clutch of the automobile is mainly composed of a plurality of permanent magnets connected to the end surface of the inner circumference of the fan fixing disk and connected with the magnet fixing plate, and is provided in the end surface of the inner cavity of the fan fixing plate. The soft magnet, the permanent magnet rotates relative to the soft magnet to generate an eddy current magnetic field, and the flexible driving fan fixed disk drives the wind blade to rotate, so as to achieve heat dissipation and cooling of the working water temperature of the engine. Since the magnet fixing disc and the fan fixing disc are driven by the transmission bearing and the transmission shaft. The existence is insufficient: First, the large axial mutual pulling force acting on the magnet fixing plate and the fan fixing plate respectively causes the rollers and the balls placed in the inner and outer ring rolling tracks of the respective transmission bearings to be in a partial grinding state. The bearing seal is not strict, so that the grease placed inside it leaks out, which aggravates the eccentric wear and tear of the respective transmission bearing; Second, the position of the soft magnet in the end surface of the fan fixing plate and the end face of the magnet fixing plate The position of several permanent magnets connected to the upper part is relatively close to the position of the respective transmission bearings. The high-temperature heat generated by the magnetic field eddy current is quickly transmitted to the transmission bearing during operation, and the electromagnetic fan clutch is in the car with poor ventilation and heat dissipation conditions. Internally, it is easy for the lubricating grease in the sealed transmission bearing to be diluted by high-temperature heat to overflow, which also exacerbates the premature wear and tear of the transmission bearing.

In the prior art, the driving connection of the electromagnetic fan clutch of the automobile is mainly composed of a fan fixing plate and a magnet fixing plate, and the soft magnet provided in the end surface of the inner cavity of the fixing disk is fixed by the fan, and the permanent magnet provided on the end surface of the magnet fixing plate is fixed. The permanent magnet rotates relative to the soft magnet to generate an eddy current magnetic field, and the flexible driving fan fixed disk drives the fan to rotate to achieve the working water temperature of the engine. Cooling down.

Since the magnet fixing disc and the fan fixing disc are driven by the transmission bearing and the driving shaft, in actual working conditions, due to the large axial mutual pulling force acting on the magnet fixing disc and the fan fixing disc, respectively, The rollers or balls placed in the respective transmission bearings press the one side of the rolling guide rails of the inner and outer rings of the bearing, so that the inner and outer ring rolling tracks of the bearing are always in a eccentric state, and finally the bearing seal is not tight, so that it is placed inside The grease leaks out and exacerbates the eccentric wear of the respective bearings until the drive bearings are destroyed.

At the same time, the distribution position of the soft magnets in the end surface of the inner cavity of the fan fixing plate and the distribution position of the permanent magnets on the end surface of the magnet fixing plate are relatively close to each other, and the soft magnet and the permanent magnet are operated when the electromagnetic fan clutch is working. The high-temperature heat generated by the magnetic field eddy current is quickly transmitted to the transmission bearing. In the electromagnetic fan clutch of the automobile with poor ventilation and heat dissipation conditions, it is easy for the lubricating grease in the sealed transmission bearing to be diluted by the high-temperature heat to overflow, which will also aggravate the transmission bearing. Wear prematurely until it is destroyed.

Since the foregoing structure can satisfy the basic performance and basic specifications of the electromagnetic fan clutch, it has been widely and long-term used in the prior art, and those skilled in the art have not attempted to improve the structure. Summary of the invention

It is an object of the present invention to provide a flexible connecting device for a new, simple, and differently constructed electromagnetic fan clutch. Another object of the present invention is to provide a simple, different construction, durable automotive electromagnetic fan clutch. It is used to solve the problem of excessive wear and high temperature of the transmission bearing of the electromagnetic fan clutch of the automobile to improve the service life of the electromagnetic fan clutch of the automobile and reduce the maintenance cost of the user.

It is still another object of the present invention to provide a method of manufacturing a flexible connecting device for manufacturing the aforementioned electromagnetic fan clutch. The flexible connecting device of the present invention includes a fan fixing plate and a magnet fixing plate, wherein: the tubular sleeve of the fan fixing plate is circumferentially provided with a soft magnet ring, and a permanent magnet is disposed on a circumferential end surface of the magnet fixing plate. The magnet fixing plate is housed in the tubular sleeve of the fan fixing plate, and the fan fixing plate and the magnet fixing plate are coaxial.

The soft magnet ring is a single ring.

A rectangular-like through groove is formed in the circumferential end surface to accommodate the permanent magnet.

The two side walls of the rectangular-like through groove are relatively bent at the opening.

The magnet fixing plate is provided with a heat dissipation rib.

The magnet fixing plate includes a bearing fixing sleeve, a vane and a connecting ring.

The vane is a trapezoidal sheet and has a right angle notch.

The angle between the blade and the upper end surface of the bearing sleeve is 30 degrees to 70 degrees, and the front and rear end faces of the blade are curved surfaces. An electromagnetic fan clutch including the flexible connecting device. An air outlet hole is formed in a circumferential distal end of the electromagnetic fan clutch fan fixed disk, and an air inlet through hole is formed in a circumferential proximal end of the fan fixed disk.

A method of manufacturing a flexible connecting device, comprising:

a) die-casting the soft magnet ring in the tubular sleeve of the fan fixing plate;

b) Install a permanent magnet on the circumferential end face of the magnet fixing plate.

The step b further includes:

c) forming a rectangular-like through groove on the circumferential end surface of the magnet fixing plate,

d) forming a bend at the opening of the rectangular-like slot.

The step b further includes:

e) Form a trapezoidal sheet on the magnet fixing plate, which has a right angle notch.

The flexible connecting device of the invention changes the corresponding positions of the soft magnet and the permanent magnet in the fan fixed disk and the magnet fixed disk, and overcomes the technical problem that the inner and outer rings are eccentrically worn by the axial pulling force of each disk drive bearing when the electromagnetic fan clutch is in working condition The flexible connecting device of the present invention changes the axial pulling force between the transmission bearings to a radial pulling force uniformly distributed along the radial direction of the magnet fixing plate, so that the direction of the applied force is the normal force direction of the transmission bearing, and the eccentric wear is avoided. The resulting bearing seal is not tight, and the grease leaks out.

At the same time, the flexible connecting device of the invention makes the corresponding position of the soft magnet and the permanent magnet away from the original transmission bearing of the disk, delaying the high temperature heat generated by the eddy current to be transmitted to each transmission bearing, and adopting heat dissipation for the disk body. Means provide favorable conditions.

The flexible connecting device of the present invention is provided with a heat sink on the outer wall and the inner cavity of the fan fixing plate, and a heat dissipating rib is arranged on the upper end surface and the lower end surface of the magnet fixing plate, which can effectively dissipate heat to the heat generating portion of the flexible connecting device, and the heat radiating rib pair The agitation of the hot air causes the hot air to be dissipated from the nearest air outlet hole. The air inlet hole timely introduces the cold air agitated by the heat sink into the inner cavity of the fan fixing plate, and forms a heat dissipation band on the path of the high temperature heat to the transmission bearing. , delay heat transfer. By using the magnet to fix the vane on the disc, the high-temperature heat-heated air can be quickly and efficiently discharged from the inner cavity of the fan fixing disc to avoid heat accumulation and conduction to the transmission bearing. The grease in the transmission bearing is not diluted by high temperature heat and overflows.

The automobile electromagnetic fan clutch manufactured by the flexible connecting device of the invention can effectively prolong the service life. Since the maintenance bearing is often damaged and inconvenient when the transmission bearing is worn and damaged, the whole electromagnetic fan clutch is usually scrapped and replaced as a whole. The invention of the automobile electromagnetic fan clutch prolongs the service life of the automobile electromagnetic fan clutch, and significantly reduces the maintenance cost of the user.

The manufacturing method of the flexible connecting device of the invention obviously reduces the weight of the fan fixing plate and the magnet fixing plate, and at the same time ensures the overall strength and precision of the fan fixing plate and the magnet fixing plate, and further increases the air flow rate and increases the heat dissipation. effect.

A unique soft magnet ring is placed in the inner wall of the tubular sleeve to reduce the change to the overall structure of the tubular sleeve and maintain rigidity. And strength, to avoid stress deformation of the inner cavity formed by the tubular sleeve when the fan is fixed.

The rectangular-like through-groove formed on the circumferential end surface of the magnet fixing plate can simplify the mounting process of the permanent magnet and facilitate the shape of the permanent magnet iron and the soft magnet ring to avoid loss of magnetic field strength.

The relative bending of the two side walls of the rectangular-like through-groove at the opening will expand with the temperature rise, and the permanent magnet can be firmly fixed to prevent the permanent magnet from loosening when the disk body is heated unevenly.

The sharp fold formed by the right angle notch on the fan blade can compress the passing airflow, significantly increase the local air flow rate, and improve the cooling effect.

The embodiments of the present invention are further described below in conjunction with the accompanying drawings. DRAWINGS

Figure 1 is a cross-sectional view showing an embodiment of a first automotive electromagnetic fan clutch of the present invention;

2 is a front view of a fan fixing plate of a first type of electromagnetic fan clutch of the present invention;

Figure 3 is a cross-sectional view taken along line A-A of Figure 2;

Figure 4 is a cross-sectional view showing the magnet fixing plate of the first automobile electromagnetic fan clutch of the present invention;

Figure 5 is a left side view of Figure 4;

Figure 6 is a front perspective view of the magnet fixing plate of the second automobile electromagnetic fan clutch of the present invention;

Figure 7 is a rear perspective view of Figure 6;

Figure 8 is a cross-sectional view showing the mounting connection of a second type of automobile electromagnetic fan clutch of the present invention;

9 is a top plan view of a fan fixing plate of a third embodiment of an automotive electromagnetic fan clutch according to the present invention;

10 is a bottom view of a fan fixing plate of a third embodiment of an automobile electromagnetic fan clutch according to the present invention;

Figure 11 is a cross-sectional view of the fan fixing plate of the third embodiment of the automobile electromagnetic fan clutch of the present invention taken along the line AA; Figure 12 is a bottom view of the first embodiment of the magnet fixing plate of the third type of automobile electromagnetic fan clutch of the present invention; 13 is a plan view of a first embodiment of a magnet fixing disk of a third type of automobile electromagnetic fan clutch of the present invention; FIG. 14 is a cross-sectional view taken along line BB of the first embodiment of the magnet fixing disk of the third type of automobile electromagnetic fan clutch of the present invention. ;

Figure 15 is an axial view of a second embodiment of a magnet fixing plate of a third type of automobile electromagnetic fan clutch of the present invention; Figure 16 is a second embodiment of a magnet fixing plate of a third type of automobile electromagnetic fan clutch of the present invention Main view; Figure 17 is a schematic cross-sectional view of a car electromagnetic fan clutch assembly. detailed description

1 to 5, an embodiment of a first automotive electromagnetic fan clutch of the present invention mainly includes a fan fixed disk The circumference of the cavity is a magnet fixing plate connected to the gap ring; it is provided with a soft magnet 2 in the circumferential surface of the inner cavity of the fan fixing plate; the soft magnet is inlaid with the outer surface of the magnet fixing plate at a pitch A number of permanent magnets 3 correspond to each other (Fig. 1, Fig. 4, Fig. 5); on the circumference of the end face of the fan fixing plate adjacent to the transmission bearing, there are 6 strips of heat insulation and cooling in the distance distribution. The air hole 1 is connected to the circumference of the end surface of the fan fixing plate provided with the soft magnet 2, and six strip-shaped heat-insulating cooling air outlet holes 9 are arranged at intervals (Fig. 2, Fig. 3). During operation, the magnetic force generated by the plurality of permanent magnets 3 uniformly distributed on the outer circumference of the magnet fixing plate with respect to the soft magnet 2 in the surface of the inner surface of the fan fixing plate cancels the radial forces acting on the respective transmission bearings The rollers or balls placed in the inner and outer ring rolling tracks of the respective transmission bearings are in normal rolling lubrication, which eliminates the damage of lubricating grease leakage caused by the eccentric wear of the transmission bearings in the prior art (shown in Figure 1). . In the work, the high-temperature heat generated by the magnetic field eddy current is cooled and cooled by the magnet fixed disk and the fan fixed disk in time. A plurality of heat dissipating ribs 10 may be distributed on the end faces of one or both sides of the magnet fixing plate. The present invention distributes a plurality of heat dissipating ribs 10 on the end faces of the magnet fixing plates (Fig. 4 And FIG. 5); a plurality of fins 11 (shown in FIG. 1) may be distributed on the outer circumference of the fan fixing disc corresponding to the soft magnet 2. In operation, the connecting flange of the drive shaft of the present invention and the fan pulley drive shaft of the present invention are freely gliding through the fan fixed disc connected by the double row radial ball bearing. When the working water temperature of the engine reaches the middle temperature setting value, the inner coil 6 is controlled by the thermostat, and the inner suction chuck 7 is driven to rotate the magnet fixing disc connected by the single row radial ball bearing; at this time, the magnet fixing disc outer circle a plurality of permanent magnets 3 are mounted on the upper surface of the fan, and the eddy current magnetic field suction generated by the rotation of the soft magnet 2 provided in the surface of the inner surface of the fan fixed disk drives the fan blade on the fixed disk (not shown) Medium speed cooling and cooling of the engine working water temperature. Since the position of the soft magnet 2 in the circumferential surface of the inner cavity of the fan fixing plate and the position of the permanent magnet 3 on the outer circumference of the magnet fixing plate are located away from the positions of the respective transmission bearings (shown in FIG. 1); When the high-temperature heat generated by the eddy current is transmitted to the fan fixing plate and the magnet fixing plate, one of the six strip-shaped heat-insulating cooling inlets and outlet holes 1 and 9 respectively connected to the inner circumferential end surface of the fan fixing plate The transmission bearing realizes two layers of interval heat resistance, which prevents most of the heat from being transmitted to its bearing (Fig. 1 - Fig. 3). Second, the rotation of the heat radiating rib 10 on the end face of the disk is fixed by the magnet to pass the outside cooling air. The heat-insulating cooling air inlet hole 1 on the end surface of the fan fixing plate is sucked into the interior of the electromagnetic fan clutch of the automobile, and the high-temperature heat generated inside the fan is discharged into the air through the heat-insulating cooling air outlet 9 for heat dissipation and cooling (Fig. 1 - - Figure 3); Third, through the rotation of the heat sink 11 on the outer circumference of the fan fixing plate, the high-temperature heat generated at the position of the soft magnet 2 in the disk body is subjected to cyclone cooling and cooling at any time; Low respective drive bearing operating temperature to ensure that the respective drive bearing grease is not in the high-temperature diluted overflow, effectively preventing the transmission bearings to wear out prematurely destroyed. The service life of the electromagnetic fan clutch of the automobile is improved, and the maintenance cost of the user is reduced. When the working water temperature of the engine rises to the set high temperature value, the thermostat controls the outer coil 5 to be energized, and the suction outer suction disc 4 directly drives the fan fixed disc to rotate at full speed (shown in FIG. 1). The connected blades (not shown) perform full-speed cooling and cooling of the engine operating water temperature.

Figure 6 - Figure 8 shows an embodiment of a second automotive electromagnetic fan clutch of the present invention, which has a cyclone cooling The magnet fixing plate of the blade, which is connected with 18 magnet fixing bodies 01 on the outer surface of the magnet fixing ring; 7 holes of the cyclone cooling blade 02 and the bearing are fixed at the surface of the hole of the magnet fixing ring The outer surface of the sleeve 03 is connected. According to different cyclone heat dissipation effects, the surface of the present invention is selected to be inclined with the surface of the cyclone cooling blade 02 (Fig. 6 - Fig. 8); of course, it may be upright (not shown). . In operation, the present invention is assembled and coupled with other components to form an automotive electromagnetic fan clutch. a concave magnet 05 is embedded in the groove-shaped magnet fixing body on the outer circumferential surface of the magnet fixing ring; the inner hole of the bearing fixing sleeve 03 is fixedly connected with the single-row radial ball bearing and the transmission shaft (shown in FIG. 8); The connecting flange of the drive shaft is connected to the car pulley; the power control line terminal 010 is connected to the thermostat. In the initial state of operation, the car pulley drive shaft is freely gliding through the fan fixed disc connected by the double row radial ball bearing (shown in Figure 8). When the working water temperature of the engine reaches the middle temperature setting value, the inner coil 08 is controlled by the thermostat, and the inner suction ring 09 drives the magnet fixing disc to rotate. At this time, the magnet fixing disc has a distribution on the outer surface of the magnet fixing ring. Some 18 permanent magnets 05, the eddy current magnetic field suction generated by the rotation of the soft magnet 04 provided in the surface of the inner surface of the fan fixed disk, drives the fan fixed disk to switch from the initial free running operation to the medium speed rotation (Fig. 8 Shown, driving a fan (not shown) connected to the fan fixed plate to perform medium-speed heat dissipation on the engine working water temperature. During operation, when the high-temperature heat generated by the magnetic field eddy current is transmitted to the magnet fixing plate and the fan fixing plate, the plurality of cyclone cooling blades 02 connected at a distance serve to connect the magnet fixing ring and the bearing fixing sleeve 03. The driving action; the spacing interval prevents the connection between the magnet fixing ring and the bearing fixing sleeve 03; and the spacing interval prevents most of the high-temperature heat of the magnet fixing ring from being transmitted to the conducting bearing (shown in Figures 6 and 8); The air swirl generated by the rotation of the cyclone cooling blade 02 passes the outside cooling air into the high temperature heat generated inside the automobile electromagnetic fan clutch through the heat insulating cooling air inlet hole 011 on the outer end surface of the fan fixing plate, and is fixed outside the fan through the fan. A plurality of cyclone holes 012 on the end surface and a plurality of cyclone holes 012 (shown in FIG. 8) between the inner end surface and the end surface of the outer suction cup 06 are swirled outward, and the cyclone heat dissipation is performed in time to ensure the magnet fixing plate. The transmission bearing of the fan fixed disk works at normal temperature, effectively preventing the lubricating grease in the transmission bearing from being overflowed by high temperature, which is obviously reduced Each drive bearing wear prematurely destroyed. The service life of the electromagnetic fan clutch of the automobile is improved, and the maintenance cost of the user is reduced. When the working water temperature of the engine rises to the set high temperature value, the thermostat controls the outer coil 07 to be energized, and the suction outer suction plate 06 directly drives the fan fixed disc to rotate at a high speed (shown in FIG. 8), and the fixed disc is fixed by the fan. The connected fan (not shown) performs high-speed cooling and cooling of the engine working water temperature.

The third embodiment of the flexible connecting device of the electromagnetic fan clutch of the present invention is composed of a fan fixing plate and a magnet fixing plate. As shown in FIGS. 9 to 11, the fan fixing plate is composed of a bearing housing 101, a ring connecting body 102, and a tubular sleeve 103. The lower portion of the outer wall of the bearing housing 101 is fixedly coupled to the inner wall of the annular connector 102, and the circumferential edge of the lower end surface of the annular connector 102 is fixedly coupled to the upper end surface of the tubular sleeve 103 to form a disk inner cavity of the fan fixing disk. A soft magnet ring 104 is disposed in the inner wall of the tubular sleeve 103, and the soft magnet ring is coaxial with the bearing housing 101. Near the bearing housing 101, there are six air inlet holes 105 extending through the upper and lower end faces of the ring connecting body 102, and the air inlet holes are evenly distributed around the bearing housing, and six places near the tubular sleeve are provided. An air outlet hole 106 penetrating through the upper and lower end faces of the ring connecting body 102, and the air outlet hole is evenly distributed around the bearing seat. The first fins 107 and the second fins 108 are disposed in the radial direction. One end of the first fins 107 is vertically connected to the outer circumference of the bearing housing 101, and the other end and the inlet air passage 105 are away from the hole wall of the bearing housing 101. The two ends of the second heat sink 108 are fixedly connected to the radial direction of the wall of the air outlet hole 106. A heat sink is also provided on the circumferential edge of the upper end surface of the ring connecting body 102 and the lower portion of the outer wall of the tubular sleeve 103.

In the manufacturing of the flexible connecting device of the third embodiment of the present invention, the manufacturing method of the fan fixing plate comprises the following steps: placing the soft magnet ring at a corresponding position of the die casting mold;

Forming the aluminum alloy material by die casting to form a bearing seat, a disk body, a disk body cavity and each heat sink, and a soft magnet ring in the inner cavity of the disk body;

The hardness and tensile strength of the fan fixing plate are further increased by the T6 heat treatment method;

The air inlet hole and the air outlet hole are punched and punched on the disk body.

The fan fixing plate of the flexible connecting device of the third embodiment of the present invention has a simple structure, a low manufacturing cost, and a simple manufacturing method. In the prior art, the structure of the fan fixing plate employs a soft magnet plate, which has a large amount of material when the same magnetic field strength is generated and the manufacturing process is cumbersome and complicated.

As shown in FIG. 12 to FIG. 14, the first type of magnet fixing plate of the flexible connecting device of the third embodiment of the present invention is composed of a bearing fixing sleeve 201 and a disk body 202. The disk body is fixedly connected to the circumferential outer wall of the bearing fixing sleeve, and the disk is fixed. The radial direction of the body is perpendicular to the axial direction of the bearing sleeve. At the circumferential edge of the disk body, 18 uniformly distributed rectangular-like grooves 203 are formed from the upper end surface to the lower end surface, and the two side walls of the rectangular-like groove 202 are relatively bent at the opening of the rectangular-like groove. A permanent magnet 204 corresponding to the rectangular-like through groove is fixedly mounted in the rectangular-like through groove. The north and south poles of the permanent magnet are radially distributed, and the south pole and the north pole of each adjacent permanent magnet in the same circumferential direction are alternately arranged. On the upper and lower end faces of the disc body, there are 27 heat dissipating ribs 205 uniformly distributed along the radial direction of the disc body.

A method for manufacturing a first type of magnet fixing plate of a flexible connecting device according to a third embodiment of the present invention comprises the steps of: forming an aluminum alloy material by die casting, forming a disk body, a bearing fixing sleeve, and a rectangular-like opening of a circumferential edge of the disk body; a heat dissipation rib of the groove and the upper and lower end faces of the disk body;

The hardness and tensile strength of the magnet fixing plate are further increased by the T6 heat treatment method;

The permanent magnet is pressed into the rectangular-like through groove by a hydraulic machine.

The first type of magnet fixing plate of the flexible connecting device of the third embodiment of the present invention has a simple structure, a low cost, and a simple manufacturing method. In the prior art, a large permanent magnet block is used in the structure of the magnet fixing disc, and a multi-step mounting is required. This kind of structure uses more materials and produces a complicated and complicated manufacturing process when the same magnetic field strength is generated.

As shown in FIGS. 15 to 16, a second type of magnet fixing disk of the flexible connecting device of the third embodiment of the present invention is composed of a bearing fixing sleeve 221, a vane 222, a connecting ring 223, and a fixing ring 224. Fixed on the outer circumferential wall of the bearing fixing sleeve 221 Three connecting seats 221a are connected, and the connecting seats 221a are evenly distributed around the circumferential outer wall of the bearing fixing sleeve 221. The connecting ring 223 is coaxial with the bearing fixing sleeve 221, and on the outer circumferential surface of the connecting ring 223, 18 uniformly distributed rectangular-like through grooves 223a and two side walls of the rectangular-like through groove 223a are opened from the upper end surface to the lower end surface. It is relatively bent at the opening of the rectangular-like slot. The rear end surface of the connecting ring 223 is fixedly connected to the front end surface of the fixing ring 224. The inner diameter of the fixing ring 224 is equal to the inner diameter of the connecting ring 223, and the outer diameter of the fixing ring 224 is equal to the outer diameter of the connecting ring 223. A permanent magnet 225 corresponding to the rectangular-like through groove is fixedly mounted in the rectangular-like through groove. The north and south poles of the permanent magnet are radially distributed, and the south pole and the north pole of each adjacent permanent magnet in the same circumferential direction are alternately arranged.

The blade 222 is a trapezoidal thin plate, and a beveled edge of the blade 222 is cut at a right angle to form a right angle notch 222a. The upper and lower ends of the trapezoidal thin plate of the blade 222 are respectively fixed to the circumferential outer wall of the bearing sleeve 221 and The inner wall of the circumference of the ring 223 is connected. The angle between the blade 222 and the upper end surface of the bearing sleeve 221 is 30 degrees, and the angle may be set to 45 degrees and 60 degrees, respectively. The vane 222 does not extend beyond the upper and lower end faces of the connecting ring 223.

A second method for manufacturing a magnet fixing plate of a flexible connecting device according to a third embodiment of the present invention includes the following steps: forming an aluminum alloy material by die casting to form a bearing fixing sleeve, a fan blade, a connecting ring and a fixing ring, and a rectangular-like through groove connecting the outer circumferential edge of the ring;

The second magnet fixing disc of the flexible connecting device of the third embodiment of the present invention has a simple structure, a low cost, and a simple manufacturing method. In the prior art, a large permanent magnet block is used in the structure of the magnet fixing disc, and a multi-step mounting is required. This kind of structure uses more materials and produces a complicated and complicated manufacturing process when the same magnetic field strength is generated.

In the prior art, the direction of the force of the magnet fixing disc is the axial force at each point on the circumference of the end surface of the disc body, and the rigidity of the disc body needs to be ensured. In the present invention, the direction of the magnet fixing disc is uniformly received along the radial direction of the disc body. Force, the rigidity of the disk is reduced, and the blades can be placed on the disk. The right angle notch 222a on the blade causes the air to flow differentially across the edge of the blade, increasing the air flow rate and further increasing the heat dissipation effect. The blade angles of 30 degrees, 45 degrees, and 60 degrees also keep the air flow rate optimal and increase the heat dissipation.

As shown in FIG. 17, the bearing housing 101 of the fan fixing plate 521 is rotatably coupled to the transmission shaft 511 through the double row radial ball bearing 501, and the bearing fixing sleeve 201 of the magnet fixing plate 522 is rotated by the single row radial ball bearing 502 and the transmission shaft 511. Connected to form a flexible connection for the electromagnetic fan clutch.

The inner suction plate 504 and the magnet fixing plate are fixedly connected by a spring piece, and the outer suction plate 506 and the fan fixing plate are fixedly connected by a spring piece, and the drive plate is fixedly connected with the transmission shaft.

When the automobile electromagnetic fan clutch is working, the connecting flange of the transmission shaft 511 is connected with the automobile pulley, the power control line terminal is connected with the temperature controller, the initial working state, the automobile pulley driving transmission shaft 511 rotates, and the double row radial ball bearing is passed. 501, the fan fixing plate 521 connecting the transmission shaft and the magnet fixing plate 522 connected to the transmission shaft through the single row radial ball bearing 502 are freely slidably rotated;

When the engine working water temperature reaches the intermediate temperature setting value, the inner coil 503 is controlled by the thermostat, and the driving disc sucks the inner suction disc 504 to drive the magnet fixing disc 522 connected through the single row radial ball bearing 502 to rotate; The permanent magnet uniformly distributed on the outer circumferential surface of the magnet fixing plate rotates relative to the soft magnet provided in the circumferential surface of the inner cavity of the fan fixing plate to generate the eddy current magnetic field suction force, and the driving fan fixed plate is switched from the free sliding rotation to the medium speed rotation. The fan blade attached to the fan fixed plate cools the engine working water temperature at a medium speed.

A permanent magnet uniformly distributed on the outer circumferential surface of the magnet fixing plate, and a radial magnetic field suction force generated by a soft magnet in a circumferential surface of the inner surface of the fan fixing disk, avoiding axial force, thereby causing a diameter acting on the respective transmission bearing The force forces cancel each other out, and the rollers or balls placed in the inner and outer ring rolling tracks of the respective transmission bearings are in normal rolling lubrication, which avoids the damage of the lubricating oil leakage caused by the eccentric wear of the transmission bearings.

When the working water temperature of the engine rises to a set high temperature value, the thermostat controls the outer coil 505 to be powered, and the drive disc pulls the outer suction disc 506 to directly drive the fan fixed disc 521 to rotate at full speed, and is connected through the fan fixed disc. The fan blade cools the engine working water temperature at full speed.

The process of cooling and cooling the electromagnetic fan clutch of the automobile using the first magnet fixing plate of the third embodiment is: when the working water temperature of the engine reaches the intermediate temperature setting value, the inner coil 503 is energized, and the driving disk sucks the inner suction plate 504. The magnet fixing disc rotates, the permanent magnet rotates relative to the soft magnet to generate the eddy current magnetic field suction, and the driving fan fixed disc is switched to the medium speed rotation, and the high temperature heat generated by the magnetic field eddy current is transmitted along the disc body to the transmission bearing, and the fan fixing plate is on the outer surface of the disc The first fins 107 and the second fins 108 and the fins on the other discs rotate to dissipate heat generated by the soft magnets to lower the temperature of the disc body; the heat dissipating ribs 205 on the upper and lower end faces of the magnet fixing discs rotate, and the heat is expanded close to the permanent magnets. The air is discharged from the air outlet hole 106, and a part of the heat is taken out to lower the temperature of the disk body. The cooling air is replenished by the first heat sink 107 into the inner cavity of the fan fixing plate through the air inlet hole 105, thereby reducing the temperature of the disk body and preventing heat from being transmitted to the transmission. Bearing conduction.

The process of cooling and cooling the automobile electromagnetic fan clutch formed by using the second magnet fixing plate of the third embodiment is as follows: the blade 222 rotates rapidly with the magnet fixing plate to generate a negative pressure, except that the heated expanded air close to the permanent magnet is discharged from the wind. The through hole 106 is discharged, and a part of the heat is taken out to lower the temperature of the disk body. The cooling air is replenished by the first heat sink 107 into the inner cavity of the fan fixing plate through the air inlet hole 105, thereby reducing the temperature of the disk body and preventing the heat from being transmitted to the transmission bearing. In addition, part of the air can be quickly discharged through the large and small suction plates at the rear of the magnet fixing plate, and the gap between the large and small elastic pieces is quickly discharged, thereby further enhancing the heat dissipation effect.

The flexible connecting device according to the present invention performs related experiments, and the experimental data and test data are compared with the original structure of the electromagnetic fan clutch as shown in the following table:

10 rose by 0.4%, unchanged by 2.2%, and extended by 3.2 times.

14 rose 1.4% rose 1.5% rose 4% rose 7% extended 3.3 times

16 rose 2% rose 2.5% rose 6% rose 8.2% extended 3.4 times

18 rose 2.6% rose 3.5% rose 8% rose 9.5% extended 3.5 times

20 rose 3.3% rose 4.6% rose 10% rose 10.1% extended 3.1 times

22 Increase 3.9% Increase 5.7% Increase 12% Increase 10.7% Extend 2.8 times According to the flexible connection device of the present invention, the experimental data and test data are compared with the original structure of the electromagnetic fan clutch.

According to the flexible connecting device of the present invention, the tilt angle of the blade 222 also has a significant impact on the heat dissipation effect. The experimental data and test data are shown in the following table:

Wind blade tilt angle Comparison of heat dissipation effect of magnet fixed disk body strength and zero angle of the same blade number

30° drop 11% increase 17%

40° down 15% up 19.7%

50° drop 19% increase 18.7%

60° down 22%, up 19.2% 70 decreased by 26% and increased by 16.6%

According to the flexible connecting device of the present invention, when the front and rear end faces of the blade 222 are curved, the positive effect on the heat dissipation is 3.2% to 6.2%. Industrial applicability

The automobile electromagnetic fan clutch of the present invention can be applied to various motor vehicles according to various adaptive modifications of various engine models, and thus has great market prospect and strong industrial applicability.

Claims

Rights request

A flexible connecting device, comprising a fan fixing plate and a magnet fixing plate, wherein: the tubular sleeve (103) of the fan fixing plate is circumferentially provided with a soft magnet ring (104), and the circumference of the magnet fixing plate Permanent magnets on the end faces

(204, 225), the magnet fixing disk is housed in the tubular sleeve (103) of the fan fixing disk, and the fan fixing disk and the magnet fixing disk are coaxial.

2. The flexible connecting device according to claim 1, wherein: said soft magnet ring (104) is a single ring.

3. The flexible connecting device according to claim 2, wherein: the circumferential end surface is provided with a rectangular-like through groove (203, 223a) for accommodating the permanent magnet.

The flexible connecting device according to claim 3, characterized in that: the two side walls of the rectangular-like through grooves (203, 223a) are relatively bent at the opening.

The flexible connecting device according to any one of claims 1 to 4, characterized in that: the magnet fixing plate is provided with a heat dissipating rib (205).

The flexible connecting device according to any one of claims 1 to 4, characterized in that the magnet fixing plate comprises a bearing fixing sleeve (221), a fan blade (222) and a connecting ring (223).

The flexible connecting device according to claim 6, wherein the vane (222) is a trapezoidal thin plate and has a right angle notch (222a).

8. The flexible connecting device according to claim 7, wherein: the angle between the blade (222) and the upper end surface of the bearing fixing sleeve (221) is 30 degrees to 70 degrees, and the blade (222) The front and rear end faces are curved faces.

9. An electromagnetic fan clutch comprising the flexible connecting device of any of claims 1-8.

10. The electromagnetic fan clutch according to claim 9, wherein: a wind passage hole (106) is opened at a circumferential end of the fan fixing plate, and a circumferential proximal end of the fan fixing plate is opened. Wind through hole (105).

11. A method of manufacturing a flexible connecting device, comprising:

a) die-casting the soft magnet ring in the tubular sleeve (103) of the fan fixing plate;

12. The method of manufacturing a flexible connecting device according to claim 11, wherein: the step b further comprises: c) forming a rectangular-like through groove on a circumferential end surface of the magnet fixing plate,

d) forming a bend at the opening of the rectangular-like slot.

13. The method of manufacturing a flexible connecting device according to claim 12, wherein: ???said step b further comprises: e) forming a trapezoidal thin plate having a right angle notch (222a) on the magnet fixing plate.