CN212564129U

CN212564129U - Electromagnetic loss clutch assembly

Info

Publication number: CN212564129U
Application number: CN202021388258.0U
Authority: CN
Inventors: 徐时聪; 樊美刚
Original assignee: Zhejiang Nessral Machinery Co ltd
Current assignee: Zhejiang Nessral Machinery Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-02-19
Anticipated expiration: 2030-07-15

Abstract

The utility model provides a lose electromagnetic clutch assembly belongs to mechanical technical field. The electromagnetic clutch assembly solves the problems that the application range of the existing electromagnetic clutch assembly is limited and the like. This electromagnetic clutch assembly loses, which comprises a rotating shaft, the belt pulley, coil iron core subassembly and coupling piece, fixedly connected with limiting plate on the belt pulley, circumference is fixed with the friction disc in the pivot, the friction disc is located between coupling piece and the limiting plate and can the endwise slip, be provided with the elastic drive spare between belt pulley and the coupling piece, the elastic drive spare effect makes coupling piece and limiting plate centre gripping friction disc between the two on the coupling piece when coil iron core subassembly loses electricity, the belt pulley includes along the axial groove portion and actuation portion of establishing that set gradually, be provided with the race on the lateral surface of establishing the groove portion, actuation portion is close to coupling piece and actuation portion and can with the actuation of coupling piece, the inside of actuation portion is provided with the installation cavity, coil iron core subassembly holds in the installation cavity. The electromagnetic clutch assembly has wide application range.

Description

Electromagnetic loss clutch assembly

Technical Field

The utility model belongs to the technical field of machinery, a lose electromagnetic clutch assembly is related to.

Background

When the engine operates, the cooling liquid needs to be circularly operated to dissipate heat, and the cooling liquid is conveyed by the water pump to circularly flow. When the temperature of the engine rises, the rotating speed of the water pump is increased, so that the cooling liquid is subjected to large circulation; when the temperature of the engine is low, the rotation speed of the water pump is reduced, and the coolant is circulated for a short time. In order to control the rotation of the water pump, it is common to arrange an electromagnetic clutch in the water pump, the electromagnetic clutch is connected with a controller, the controller is provided with a temperature sensor for detecting the temperature of the engine, the temperature sensor sends the detected temperature to the controller, the controller controls the electromagnetic clutch to act according to the received temperature information, the belt pulley drives the water pump rotating shaft to rotate at a high speed when the electromagnetic clutch is powered on, and the belt pulley does not drive the water pump rotating shaft to rotate or drives the water pump rotating shaft to rotate at a low speed when the electromagnetic clutch is powered off. When the water pump electromagnetic clutch with the structure is used, when the electromagnetic clutch breaks down or power failure occurs, the rotating shaft of the water pump cannot rotate, so that the engine cannot be cooled, and the engine is easily caused to be continuously in a high-temperature working state or even burnt out.

Chinese patent literature discloses a electromagnetic clutch assembly [ application number: cn201920818059. x; publication No.: 210050219U ], which comprises a rotating shaft, a belt pulley, a coil iron core assembly and a coupling piece, the coupling piece is attracted with the belt pulley through the coil iron core assembly after the power-on, fixedly connected with limiting plate on the belt pulley, the coupling piece is located between the belt pulley and the limiting plate and can axially move, the circumference is fixed with a friction plate in the rotating shaft, the friction plate is located between the coupling piece and the limiting plate and can axially slide, an elastic driving piece is arranged between the belt pulley and the coupling piece, when the coil iron core assembly loses power, the elastic driving piece acts on the coupling piece to enable the coupling piece and the limiting plate to clamp the friction plate between.

The belt pulley passes through the rotation axis connection of drive mechanism with the engine, and the rotation axis of engine rotates and drives the belt pulley and rotate, thereby limiting plate fixed connection rotates along with the belt pulley on the belt pulley, and one of pivot is served and is connected with the water pump impeller. When the coil core assembly loses power, the coupling piece is not attracted to the belt pulley, and under the action of the elastic driving piece, the coupling piece and the limiting plate clamp the friction plate between the coupling piece and the limiting plate, so that the coupling piece, the friction plate and the limiting plate are overlapped and reach a fixed state, the belt pulley drives the rotating shaft to rotate through the friction plate and reach synchronous rotation, and the high-speed rotation of the water pump is realized. When the coil iron core assembly is electrified, the coil iron core assembly generates magnetic force to enable the coupling piece to be close to the belt pulley and to be attracted to the belt pulley, the coupling piece, the friction piece and the limiting plate are loosened, the friction piece is not fixed with the limiting plate any more, the rotation of the belt pulley cannot be transmitted to the rotating shaft, the rotating shaft does not rotate synchronously with the belt pulley, and the water pump does not rotate at a high speed any more. Therefore, when the electromagnetic clutch fails or power failure occurs, the rotating shaft of the water pump is in a high-speed rotating state, and the engine can be cooled, so that the engine is in a low-temperature working state and cannot be burnt out.

The positional relationship of the pulley and the coil core assembly fixed in the pulley internal cavity and located inside the pulley groove is also disclosed in the embodiments of the above-mentioned patent documents. In order to realize certain electromagnetic force, the coil core assembly usually occupies certain volume space in the cavity inside the belt pulley, so that the diameter of the pulley groove of the belt pulley is limited by the structure of the coil core assembly. When the design requirement of the transmission torque of the belt pulley is required to be met, and the diameter of the pulley groove of the belt pulley is required to be smaller than the overall dimension of the coil iron core assembly, the coil iron core assembly cannot be assembled with the belt pulley. Therefore, the diameter of the pulley groove of a part of the belt pulleys cannot be selected due to the assembly structure of the belt pulleys and the coil core assembly, namely, the transmission torque within a certain range cannot be realized, so that the application range of the electromagnetic clutch assembly is limited, and the market popularization of products is restricted.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a lose electromagnetic clutch assembly, solved the current limited technical problem of lose electromagnetic clutch assembly range of application.

The purpose of the utility model can be realized by the following technical proposal:

a loss electromagnetic clutch assembly comprises a rotating shaft, a belt pulley, a coil iron core assembly and a coupling piece, wherein the coupling piece is attracted with the belt pulley through the coil iron core assembly after being electrified, a limiting plate is fixedly connected to the belt pulley, the coupling piece is positioned between the belt pulley and the limiting plate and can axially move, a friction plate is circumferentially fixed on the rotating shaft, the friction plate is positioned between the coupling piece and the limiting plate and can axially slide, an elastic driving piece is arranged between the belt pulley and the coupling piece, when the coil iron core assembly loses electricity, the elastic driving piece acts on the coupling piece to enable the coupling piece and the limiting plate to clamp the friction plate between the coupling piece and the limiting plate, the loss electromagnetic clutch assembly is characterized in that the belt pulley comprises a groove establishing part and an attraction part which are sequentially arranged along the axial direction, a wheel groove is arranged on the outer side surface of the groove establishing part, the attraction part is close to the, the inside of actuation portion is provided with the installation cavity, coil core subassembly holds in the installation cavity.

Establish slot part and actuation portion on the belt pulley and set gradually along the axial, be establishing the race on the slot part like this and the installation cavity of setting in the actuation portion not at same axial position, thereby the radial dimension mutually noninterfere of radial dimension and installation cavity on the messenger establishes the slot part, and coil core subassembly holds in the installation cavity, the diameter size of race can not receive the structural constraint of coil core subassembly like this, the diameter size of race can be greater than the external diameter of coil core subassembly, also can be less than or equal to the external diameter of coil core subassembly, compare in prior art, the utility model discloses enlarged the optional scope of race diameter size, increased transmission torque's design range promptly, thereby make the electromagnetic clutch assembly range of application increase of losing.

In foretell electromagnetic clutch assembly that loses, the belt pulley is the components of a whole that can function independently structure, the belt pulley is including components of a whole that can function independently fixed rim plate and magnetic disc, the magnetic disc is located between rim plate and the coupling piece, have on the rim plate establish the slot part, still have on the rim plate with the fixed flange connection portion of magnetic disc, the one side relative with the magnetic disc on the flange connection portion is provided with the recess, the one side relative with the rim plate on the magnetic disc is provided with the mounting groove, magnetic disc and flange connection portion constitute actuation portion, recess and mounting groove are constituteed the installation cavity.

Because the installation cavity comprises recess and mounting groove and rim plate and the disk components of a whole that can function independently are fixed, so, can part rim plate and disk earlier during the equipment, install the coil iron core subassembly back in recess or the mounting groove, it is fixed with rim plate and disk again, thereby make the coil iron core subassembly install the installation cavity smoothly, the coil iron core subassembly need not place the installation cavity from establishing the slot part, can avoid influencing the installation of coil iron core subassembly because of the external diameter size undersize of establishing the slot part, when making coil iron core subassembly simple to operate, the external diameter size design of having guaranteed to establish the slot part does not receive the influence of coil iron core subassembly, be favorable to improving this application scope of losing the electromagnetic clutch assembly.

In the electromagnetic clutch assembly, one surface of the magnetic disk opposite to the wheel disk is provided with a convex positioning bulge, one surface of the wheel disk opposite to the magnetic disk is provided with a positioning groove corresponding to the positioning bulge, and the positioning bulge is embedded into the positioning groove.

Carry out radial positioning through protruding and the constant head tank in location to make things convenient for the location equipment of rim plate and disk, guarantee simultaneously that the installation cavity structure of constituteing by recess and mounting groove can match with coil iron core subassembly, avoid coil iron core subassembly and the groove wall of recess or the groove wall of mounting groove to take place the friction, make and lose electromagnetic clutch assembly job stabilization.

In foretell lose electromagnetic clutch assembly, lose electromagnetic clutch assembly and install on the working machine, the working machine includes the shell, be provided with the installation department on the shell, the rim plate suit is provided with the bearing between the outside of installation department and rim plate and installation department, be provided with the wire passageway on the installation department, be connected with mounting bracket and wire on the coil iron core subassembly, mounting bracket fixed connection is on the installation department, the wire is worn to establish in the wire passageway.

During the equipment, can fix the bearing in the rim plate earlier, then the rim plate suit is to the installation department on, again with coil iron core subassembly pick up, penetrate the wire passageway with the wire on the coil iron core subassembly, later pass through the mounting bracket with coil iron core subassembly and fix on the installation department, then fix the disk on flange joint portion. Therefore, the coil core assembly can be smoothly installed in the installation cavity, and the lead connected to the coil core assembly can be smoothly led out of the installation cavity. The coil iron core component does not need to be placed into the installation cavity from establishing the slot part, can avoid influencing the installation of coil iron core component because of the external diameter undersize who establishes the slot part, has also guaranteed that the external diameter size design who establishes the slot part does not receive the influence of coil iron core component structure size, is favorable to improving this application scope of losing the electromagnetic clutch assembly.

In foretell lose electromagnetic clutch assembly, it is protruding to be provided with the fender on the lateral surface of installation department, be provided with on the mounting bracket and keep off the shoulder, the inner circle centre gripping of bearing is fixed in and keeps off between protruding and the fender shoulder, be provided with on the medial surface of rim plate and keep off protruding relative convex shoulder, still be provided with the fixed slot on the medial surface of rim plate, the inherent rand of fixed slot inside callipers, the outer lane centre gripping of bearing is fixed in between convex shoulder and the rand, the wire passageway is including seting up the wire casing on the installation department lateral surface.

During the equipment, can insert the rim plate with the bearing earlier, make the outer lane of bearing support and lean on the convex shoulder, then go into the rand card in the fixed slot, make the bearing fix in the rim plate, later place coil iron core subassembly in the recess, take up rim plate and coil iron core subassembly and be close to the installation department after that, then imbed the wire in the wire casing, again with the bearing suit on the rim plate on the installation department, the inner circle of bearing supports and leans on keeping off protruding of installation department, again with the installation department fixed to the installation department, and make the fender shoulder on the installation department support and lean on the bearing inner circle, thereby fix the bearing inner circle centre gripping and keep off between the shoulder at keeping off protruding and keeping off, later fix the disk. Therefore, the coil iron core assembly is smoothly installed in the installation cavity, and the lead connected to the coil iron core assembly can be conveniently installed on the installation part and led out from the installation cavity through the wire groove. The coil iron core component does not need to be placed into the installation cavity from establishing the slot part to can avoid influencing the installation of coil iron core component because of the external diameter undersize who establishes the slot part, also guaranteed that the external diameter size design who establishes the slot part does not receive the influence of coil iron core component, be favorable to improving this application scope of losing electromagnetic clutch assembly.

In foretell lose electromagnetic clutch assembly, be provided with the through-hole on the installation department, the pivot is worn to establish in the through-hole, be provided with the location bulge loop on the mounting bracket, the location bulge loop inserts in the through-hole, and the lateral surface of location bulge loop pastes with the hole wall of through-hole and pastes and lean on.

Through location bulge loop radial positioning mounting bracket, make coil iron core subassembly location accurate when making things convenient for the mounting bracket location installation, avoid coil iron core subassembly and the chamber wall of installation cavity to take place the friction, make and lose electromagnetic clutch assembly job stabilization.

In foretell lose electromagnetic clutch assembly, fixedly connected with heating panel in the pivot, fixedly connected with magnet attaches the board on the belt pulley, magnet attaches the board and sets up along relative with the outer of heating panel, and has the clearance between the outer edge of magnet attached board and heating panel, magnet attaches and is fixed with the several permanent magnet along circumference evenly distributed on the board, the outer edge department of heating panel is provided with the response metal that corresponds with the permanent magnet.

When the coil core assembly is electrified, the coupling piece is attracted on the belt pulley, the coupling piece, the friction plate and the limiting plate are loosened, and the belt pulley cannot drive the rotating shaft to synchronously rotate through the friction plate. Because magnet attaches board and belt pulley fixed connection, the belt pulley rotation drives magnet and attaches the board rotation, and has the magnetic induction effort between the response metal on the heating panel and the permanent magnet on the magnet attaches the board, attaches the board through magnetic force magnet and drives the heating panel differential rotation, just so makes to form differential rotation between pivot and the belt pulley, has realized the low-speed rotation of pivot when coil iron core subassembly circular telegram.

In foretell lose electromagnetic clutch assembly, the belt pulley is the components of a whole that can function independently structure, the belt pulley includes the fixed rim plate of components of a whole that can function independently and magnetic disk, the magnetic disk is located between rim plate and the coupling piece, have on the rim plate establish the slot part, still have on the rim plate with the fixed flange connection portion of magnetic disk, the one side relative with the rim plate on the magnetic disk is provided with the mounting groove, magnetic disk and flange connection portion constitute actuation portion, the groove wall of flange connection portion and mounting groove encloses into the installation cavity.

Because the installation cavity is enclosed by the groove wall face of flange joint portion and mounting groove and rim plate and the components of a whole that can function independently of magnetic disc are fixed, so, can part rim plate and magnetic disc earlier during the equipment, install the coil iron core subassembly back in the mounting groove, it is fixed with rim plate and magnetic disc again, thereby make the coil iron core subassembly install the installation cavity smoothly, the coil iron core subassembly need not place the installation cavity from establishing the slot part, can avoid influencing the installation of coil iron core subassembly because of the external diameter undersize of establishing the slot part, when making coil iron core subassembly simple to operate, guaranteed that the external diameter size design of establishing the slot part does not receive the influence of coil iron core subassembly, be favorable to improving this application scope of losing electromagnetic clutch assembly.

In foretell lose electromagnetic clutch assembly, the belt pulley is the components of a whole that can function independently structure, the belt pulley includes the fixed rim plate of components of a whole that can function independently and magnetic disc, the magnetic disc is located between rim plate and the coupling piece, have on the rim plate establish the slot part, still have on the rim plate with the fixed flange joint portion of magnetic disc, the one side relative with the magnetic disc on the flange joint portion is provided with the recess, magnetic disc and flange joint portion constitute actuation portion, the groove wall face and the magnetic disc of recess enclose and become the installation cavity.

Because the installation cavity is enclosed into and rim plate and the disk components of a whole that can function independently is fixed by the groove wall face and the disk of recess, so, can part rim plate and disk earlier during the equipment, install coil iron core subassembly back in the recess, it is fixed with rim plate and disk again, thereby make coil iron core subassembly install the installation cavity smoothly, coil iron core subassembly need not place the installation cavity from establishing the slot part, can avoid influencing the installation of coil iron core subassembly because of the external diameter size undersize of establishing the slot part, when making coil iron core subassembly simple to operate, the external diameter size design of having guaranteed to establish the slot part does not receive the influence of coil iron core subassembly, be favorable to improving this application scope of losing electromagnetic clutch assembly.

Compared with the prior art, the utility model has the advantages of it is following:

the pulley groove and the installation cavity on the belt pulley are located at different axial positions, and the coil core assembly is accommodated in the installation cavity, so that the diameter size of the pulley groove and the structural size of the coil core assembly cannot interfere, the selection range of the diameter size of the pulley groove of the belt pulley is improved, and the application range of the electromagnetic clutch assembly is widened. The installation cavity comprises recess and mounting groove, and the recess setting is on the rim plate, and the mounting groove setting is on the disk, and rim plate and disk components of a whole that can function independently are fixed, and the selection of belt pulley race diameter size does not influence the installation of coil iron core subassembly, is favorable to improving the range of application of this electromagnetic clutch assembly. The rim plate suit is on the installation department of shell, and the mounting bracket is fixed on the installation department, and the wire is worn to establish in the wire passageway of installation department, makes the selection of belt pulley race diameter size not influence the installation of coil core subassembly, is favorable to improving this application scope of losing the electromagnetic clutch assembly. The setting up of location arch and constant head tank makes rim plate and magnetic disc location accurate, and the setting up of location bulge loop makes mounting bracket and installation department location accurate to make coil iron core subassembly and belt pulley location accurate, avoid coil iron core subassembly and the chamber wall of installation cavity to take place the friction, make this electromagnetic clutch assembly job stabilization that loses.

Drawings

FIG. 1 is a cross-sectional view of a first embodiment of the electromagnetic clutch assembly of the present invention.

In the figure, 1, a rotating shaft; 2. a belt pulley; 2a, arranging a groove part; 2a1, race; 2b, a suction part; 2b1, mounting cavity; 2c, a wheel disc; 2c1, flange connection; 2c2, groove; 2c3, a positioning groove; 2c4, shoulder; 2c5, fixation groove; 2d, a magnetic disk; 2d1, mounting groove; 2d2, positioning projection; 3. a coil core assembly; 4. a coupling piece; 6. a limiting plate; 7. a friction plate; 8. an elastic driving member; 9. a housing; 9a, a mounting part; 9a1, wire grooves; 9a2, vias; 9a3, stop bump; 10. a bearing; 11. a mounting frame; 11a, a shoulder; 11b, a positioning convex ring; 12. a wire; 13. a collar; 14. a heat dissipation plate; 14a, induction metal; 15. a magnet attachment plate; 15a, a permanent magnet; 16. a gap; 17. a shaft coupling bearing; 18. and a shaft sleeve.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1, an electromagnetic clutch assembly is mounted on a working machine including a housing 9. The housing 9 is provided with a mounting portion 9a, the mounting portion 9a is provided with a through hole 9a2, and the electromagnetic clutch assembly is mounted on the mounting portion 9 a. The working machine may be a water pump, a fan, or the like, and in this embodiment, the working machine is exemplified as the water pump.

The electromagnetic loss clutch assembly comprises a rotating shaft 1, a belt pulley 2 and a coil core assembly 3, wherein the rotating shaft 1 is arranged in a through hole 9a2 in a penetrating mode, the inner end of the rotating shaft 1 is fixedly connected with a water pump impeller, the outer end of the rotating shaft 1 extends out of a through hole 9a2 and is fixedly connected with a shaft sleeve 18, and the shaft sleeve 18 and the rotating shaft 1 are fixed in a tight fit mode. The middle part of the rotating shaft 1 is provided with a shaft connecting bearing 17, and the shaft connecting bearing 17 is fixed in the through hole 9a 2. The belt pulley 2 comprises a groove part 2a and an attraction part 2b which are sequentially arranged along the axial direction, a pulley groove 2a1 is arranged on the outer side surface of the groove part 2a, an installation cavity 2b1 is arranged inside the attraction part 2b, and the coil core assembly 3 is contained in the installation cavity 2b 1.

The belt pulley 2 is of a split structure, the belt pulley 2 comprises a wheel disc 2c and a magnetic disc 2d which are fixed in a split mode, the wheel disc 2c and the magnetic disc 2d are sequentially arranged along the axial direction, and the magnetic disc 2d is located on the outer side of the wheel disc 2 c. The wheel disc 2c is fitted over the mounting portion 9a, and a bearing 10 is provided between the wheel disc 2c and the mounting portion 9 a. The groove 2a is provided on the inner end of the disk 2c, the outer end of the disk 2c has a flange connecting portion 2c1 fixed to the disk 2d, and the inner end face of the disk 2d abuts against the outer end face of the flange connecting portion 2c 1. The flange connecting portion 2c1 has a groove 2c2 on the outer end surface of the flange connecting portion 2c1, which is the surface opposite to the disk 2d, the disk 2d has a mounting groove 2d1 on the inner end surface of the disk 2d, which is the surface opposite to the disk 2c, the disk 2d and the flange connecting portion 2c1 constitute a suction portion 2b, and the groove 2c2 and the mounting groove 2d1 constitute a mounting cavity 2b 1. The disk 2d has a projecting positioning protrusion 2d2 on the surface opposite to the disk 2c, i.e., the inner end surface of the disk 2d, and the disk 2c has a positioning groove 2c3 corresponding to the positioning protrusion 2d2 on the surface opposite to the disk 2d, i.e., the outer end surface of the flange connecting portion 2c1, and the positioning protrusion 2d2 is inserted into the positioning groove 2c3, and the outer side surface of the positioning protrusion 2d2 abuts against the outer side wall of the positioning groove 2c 3.

The mounting portion 9a is provided with a wire passage, one end of the wire passage penetrates through the outer end face of the mounting portion 9a, and the other end of the wire passage penetrates through the outer side face of the inner end of the mounting portion 9 a. The wire passage includes a long hole provided in the mounting portion 9a, or the wire passage includes a wire groove 9a1 provided on an outer side surface of the mounting portion 9 a. The coil core assembly 3 is connected with an installation frame 11 and a wire 12, the installation frame 11 is fixedly connected to the outer end face of the installation portion 9a, and the wire 12 penetrates through a wire channel. The mounting frame 11 is fixed on the mounting part 9a through screws or bolts, and the screws or bolts penetrate through the mounting frame 11 and then are in threaded connection with the mounting part 9 a; or the mounting frame 11 is fixed on the mounting part 9a through a stud and a nut, one end of the stud is in threaded connection with the mounting part 9a, and the other end of the stud penetrates through the mounting frame 11 and then is in threaded connection with the nut. The outer side surface of the mounting part 9a is provided with a stop protrusion 9a3, the mounting frame 11 is provided with a stop shoulder 11a, and the inner ring of the bearing 10 is clamped and fixed between the stop protrusion 9a3 and the stop shoulder 11 a. The inner side surface of the wheel disc 2c is provided with a shoulder 2c4 opposite to the stop protrusion 9a3, the inner side surface of the wheel disc 2c is further provided with a fixing groove 2c5, a clamping ring 13 is clamped and fixed in the fixing groove 2c5, and the outer ring of the bearing 10 is clamped and fixed between the shoulder 2c4 and the clamping ring 13. The mounting bracket 11 is further provided with a positioning convex ring 11b, the positioning convex ring 11b is inserted into the through hole 9a2, and the outer side surface of the positioning convex ring 11b is abutted with the hole wall surface of the through hole 9a 2.

A limiting plate 6 is fixedly connected to the outer end face of the disk 2d, and a movable gap is formed between the limiting plate 6 and the outer end face of the disk 2 d. A limiting column is fixed between the limiting plate 6 and the disk 2d, and two ends of the limiting column respectively abut against the disk 2d and the limiting plate 6. The axial height of the limiting column is the axial width of the movable gap. The limiting columns are provided with a plurality of limiting columns which are uniformly arranged on the edge of the outer end face of the disk 2d, through holes 9a2 are formed in the limiting columns, and screws or bolts penetrate through the through holes 9a2 and then are in threaded connection with the disk 2d, namely the limiting plate 6 is fixedly connected with the disk 2d through the screws or bolts. The number of the limiting columns can be two, three or four. The coupling piece 4 is arranged in the movable gap, the coupling piece 4 is circumferentially fixed with the magnetic disk 2d, and the coupling piece 4 can axially slide in the movable gap. The edge of the coupling piece 4 is provided with through holes corresponding to the limiting columns one by one, and the limiting columns penetrate through the corresponding through holes. The coupling sheet 4 and the limit plate 6 are sleeved and suspended on the shaft sleeve 18.

An external spline is arranged on the outer side surface of the shaft sleeve 18, the shaft sleeve 18 is sleeved with the friction plate 7, the friction plate 7 is in spline fit with the external spline of the shaft sleeve 18, the friction plate 7 is located between the coupling plate 4 and the limiting plate 6, and the friction plate 7 can slide on the shaft sleeve 18 along the axial direction. The coupling piece 4, the friction plate 7 and the limiting plate 6 are arranged in parallel, and the sum of the axial width of the coupling piece 4 and the axial width of the friction plate 7 is smaller than the axial height of the limiting column. The shaft sleeve 18 and the friction plate 7 can be connected through single key or double key matching. The side face of the friction plate 7 opposite to the coupling plate 4 and the side face opposite to the limiting plate 6 are both provided with wear-resistant layers, the wear-resistant layers are made of wear-resistant materials, and the wear-resistant materials can be alumina or silicon carbide and other materials. The limiting column is positioned on the outer side of the friction plate 7, and a gap is formed between the friction plate 7 and the limiting column. Be provided with elastic drive spare 8 between belt pulley 2 and the coupling piece 4, when 3 circular telegrams of coil iron core group spare, the effort that elastic drive spare 8 was overcome to coupling piece 4 is by the actuation on the outer terminal surface of disc 2d, and when 3 electric losses of coil iron core group spare, elastic drive spare 8 effect makes coupling piece 4 and limiting plate 6 centre gripping friction disc 7 between the two on coupling piece 4, makes coupling piece 4, friction disc 7 and limiting plate 6 coincide and reach fixed state. The elastic driving part 8 comprises a pressure spring, a mounting hole is formed in the edge of the outer end face of the magnetic disk 2d, the pressure spring is mounted in the mounting hole, the mounting hole is provided with a plurality of mounting holes which are evenly arranged along the circumferential direction, and the pressure spring is provided with a plurality of mounting holes which are in one-to-one correspondence with the mounting holes.

The outer end face of the shaft sleeve 18 is fixedly connected with a heat dissipation plate 14, the outer side face of the magnetic disk 2d is provided with a protruding fixing ring, the outer end face of the fixing ring is fixedly connected with an annular magnet attachment plate 15, the magnet attachment plate 15 is opposite to the outer edge of the heat dissipation plate 14, a gap 16 is formed between the magnet attachment plate 15 and the outer edge of the heat dissipation plate 14, the magnet attachment plate 15 is fixedly provided with a plurality of permanent magnets 15a which are evenly distributed along the circumferential direction, and the outer edge of the heat dissipation plate 14 is provided with induction metal 14a corresponding to the permanent magnets 15 a. The induction metal 14a is an iron plate or a steel plate having a ring shape. The number of the permanent magnets 15a may be set according to the size of the magnet attachment plate 15 and the size of the permanent magnets 15 a. The magnet attachment plate 15 is fixedly connected to the fixing ring by a screw or a bolt, and the screw or the bolt is screwed to the flange connecting portion 2c1 after passing through the magnet attachment plate 15 and the fixing ring, so that the magnet attachment plate 15, the magnetic disk 2d, and the disk 2c can be fixedly connected. Or the screw or the bolt penetrates through the flange connecting part 2c1, the fixing ring and the magnet attachment plate 15 and then is in threaded connection with the nut; or the wheel disc 2c and the magnetic disc 2d are fixed by welding to form the integrated belt pulley 2, and the screw or bolt penetrates through the magnet attachment plate 15 and then is in threaded connection with the belt pulley 2. The working principle of the electromagnetic clutch assembly can refer to patent document with patent number CN201920818059. X.

Set gradually the slot part 2a and the actuation part 2b of establishing on belt pulley 2 along the axial, be establishing race 2a1 on the slot part 2a like this and the installation cavity 2b1 that sets up in actuation part 2b not at same axial position, thereby make the radial dimension who establishes on the slot part 2a and installation cavity 2b1 mutually noninterfere, and coil iron core subassembly 3 holds in installation cavity 2b1, the diameter size of race 2a1 can not receive coil iron core subassembly 3's structural limitation like this, the diameter size of race 2a1 can be greater than coil iron core subassembly 3's external diameter, also can be less than or equal to coil iron core subassembly 3's external diameter, compare in prior art, the utility model discloses the optional scope of race 2a1 diameter size has been enlarged, transmission torque's design scope has been increased promptly, thereby make the electromagnetic clutch assembly application scope increase.

Since the mounting cavity 2b1 is composed of the groove 2c2 and the mounting groove 2d1 and the disk 2c and the disk 2d are separately fixed, when assembling, the disk 2c and the disk 2d may be separated first, then the bearing 10 is inserted into the disk 2c, the outer race of the bearing 10 abuts against the shoulder 2c4, then the retainer 13 is clamped into the fixing groove 2c5, the bearing 10 is fixed in the disk 2c, then the coil core assembly 3 is placed into the groove 2c2, then the disk 2c and the coil core assembly 3 are taken up and close to the mounting portion 9a, and the lead 12 is embedded into the wire groove 9a1, then the bearing 10 on the disk 2c is sleeved on the mounting portion 9a, the inner race of the bearing 10 abuts against the shoulder 9a3 of the mounting portion 9a, then the mounting bracket 11 is fixed to the end face of the mounting portion 9a, and the shoulder 11a on the mounting bracket 11a abuts against the inner race of the bearing 10, thereby the bearing 10 is clamped and fixed between the shoulder 9a3 and the shoulder 9a, the disk 2d is then fixed to the turntable 2 c. In coil core subassembly 3 just so installed installation cavity 2b1 smoothly, and the wire 12 of connecting on the coil core subassembly 3 also can install on installation department 9a and draw forth from installation cavity 2b1 very conveniently through wire casing 9a1, coil core subassembly 3 need not place installation cavity 2b1 from establishing slot part 2a, can avoid influencing coil core subassembly 3's installation because of the external diameter size undersize who establishes slot part 2a, the external diameter size design of establishing slot part 2a has also been guaranteed not influenced by coil core subassembly 3, be favorable to improving this application scope of losing electromagnetic clutch assembly.

Example two

The pulley 2 is a separate structure, but the position of dividing the pulley 2 is different from the first embodiment. Specifically, belt pulley 2 includes that the components of a whole that can function independently are fixed rim plate 2c and disc 2d, disc 2d is located between rim plate 2c and coupling piece 4, it establishes slot part 2a to have on the rim plate 2c, still have on the rim plate 2c with the fixed flange connecting portion 2c1 of disc 2d, the one side that is relative with disc 2d on the flange connecting portion 2c1 is provided with recess 2c2, disc 2d and flange connecting portion 2c1 constitute actuation portion 2b, disc 2d is last not to be provided with mounting groove 2d1, the mounting chamber 2b1 is enclosed with disc 2d to the groove wall face of recess 2c 2. The other structure is the same as the first embodiment.

EXAMPLE III

The pulley 2 is a separate structure, but the position of dividing the pulley 2 is different from those of the first and second embodiments. Specifically, belt pulley 2 includes that the components of a whole that can function independently are fixed rim plate 2c and disc 2d, disc 2d is located between rim plate 2c and coupling piece 4, it establishes slot part 2a to have on the rim plate 2c, still have on the rim plate 2c with the fixed flange connecting portion 2c1 of disc 2d, the one side relative with rim plate 2c is provided with mounting groove 2d1 on the disc 2d, the actuation portion 2b is constituteed with flange connecting portion 2c1 to disc 2d, do not set up recess 2c2 on the flange connecting portion 2c1, the groove wall face of flange connecting portion 2c1 and mounting groove 2d1 encloses into installation cavity 2b 1. The other structure is the same as the first embodiment.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a lose electromagnetic clutch assembly, includes pivot (1), belt pulley (2), coil iron core subassembly (3) and coupling piece (4), coupling piece (4) are through coil iron core subassembly (3) and belt pulley (2) actuation after the circular telegram, fixedly connected with limiting plate (6) on belt pulley (2), coupling piece (4) are located between belt pulley (2) and limiting plate (6) and can axial displacement, circumference is fixed with friction disc (7) on pivot (1), friction disc (7) are located between coupling piece (4) and limiting plate (6) and can axial slip, be provided with elastic drive spare (8) between belt pulley (2) and coupling piece (4), when coil iron core subassembly (3) loses the electricity elastic drive spare (8) are used in coupling piece (4) and make coupling piece (4) and limiting plate (6) centre gripping friction disc (7) between the two, its characterized in that, belt pulley (2) include along the axial establish slot part (2a) and actuation portion (2b) that set gradually, be provided with race (2a1) on the lateral surface of establishing slot part (2a), actuation portion (2b) are close to coupling piece (4) and actuation portion (2b) can with coupling piece (4) actuation, the inside of actuation portion (2b) is provided with installation cavity (2b1), coil iron core subassembly (3) hold in installation cavity (2b 1).

2. The electromagnetic loss clutch assembly according to claim 1, characterized in that the pulley (2) is of split construction, the belt pulley (2) comprises a wheel disc (2c) and a magnetic disc (2d) which are fixed in a split way, the magnetic disc (2d) is positioned between the wheel disc (2c) and the coupling piece (4), the wheel disc (2c) is provided with the groove part (2a), the turntable (2c) is also provided with a flange connecting part (2c1) fixed with the magnetic disk (2d), a groove (2c2) is arranged on one surface of the flange connecting part (2c1) opposite to the disk (2d), one surface of the magnetic disk (2d) opposite to the wheel disc (2c) is provided with a mounting groove (2d1), the magnetic disk (2d) and the flange connecting part (2c1) form the attraction part (2b), the groove (2c2) and the mounting groove (2d1) form the mounting cavity (2b 1).

3. The electromagnetic loss clutch assembly according to claim 2, wherein the disc (2d) has a protruding positioning protrusion (2d2) on the side opposite to the disc (2c), the disc (2c) has a positioning groove (2c3) corresponding to the positioning protrusion (2d2) on the side opposite to the disc (2d), and the positioning protrusion (2d2) is embedded in the positioning groove (2c 3).

4. The electromagnetic clutch assembly that loses of claim 2 or 3, characterized in that, loses electromagnetic clutch assembly and installs on the working machine, the working machine includes shell (9), be provided with installation department (9a) on shell (9), rim plate (2c) suit is provided with bearing (10) between the outside of installation department (9a) and rim plate (2c) and installation department (9a), be provided with the wire passageway on installation department (9a), be connected with mounting bracket (11) and wire (12) on coil iron core subassembly (3), mounting bracket (11) fixed connection is on installation department (9a), wire (12) are worn to establish in the wire passageway.

5. The electromagnetic loss clutch assembly according to claim 4, wherein a retaining protrusion (9a3) is arranged on the outer side face of the mounting portion (9a), a retaining shoulder (11a) is arranged on the mounting frame (11), the inner ring of the bearing (10) is clamped and fixed between the retaining protrusion (9a3) and the retaining shoulder (11a), a shoulder (2c4) opposite to the retaining protrusion (9a3) is arranged on the inner side face of the wheel disc (2c), a fixing groove (2c5) is further arranged on the inner side face of the wheel disc (2c5), the fixing collar (13) is clamped and fixed in the fixing groove (2c5), the outer ring of the bearing (10) is clamped and fixed between the shoulder (2c4) and the collar (13), and the wire channel comprises a wire groove (9a1) formed in the outer side face of the mounting portion (9 a).

6. The electromagnetic loss clutch assembly according to claim 4, characterized in that a through hole (9a2) is formed in the mounting portion (9a), the rotating shaft (1) is inserted into the through hole (9a2), a positioning convex ring (11b) is arranged on the mounting frame (11), the positioning convex ring (11b) is inserted into the through hole (9a2), and the outer side surface of the positioning convex ring (11b) is attached to the wall surface of the through hole (9a 2).

7. The electromagnetic loss clutch assembly according to claim 1, 2 or 3, wherein the rotating shaft (1) is fixedly connected with a heat dissipation plate (14), the belt pulley (2) is fixedly connected with a magnet attachment plate (15), the magnet attachment plate (15) is arranged opposite to the outer edge of the heat dissipation plate (14), a gap (16) is formed between the magnet attachment plate (15) and the outer edge of the heat dissipation plate (14), the magnet attachment plate (15) is fixed with a plurality of permanent magnets (15a) which are uniformly distributed along the circumferential direction, and the outer edge of the heat dissipation plate (14) is provided with induction metal (14a) corresponding to the permanent magnets (15 a).

8. The electromagnetic loss clutch assembly according to claim 1, wherein the belt pulley (2) is of a split structure, the belt pulley (2) comprises a wheel disc (2c) and a magnetic disc (2d) which are fixed in a split manner, the magnetic disc (2d) is located between the wheel disc (2c) and the coupling piece (4), the groove (2a) is formed in the wheel disc (2c), a flange connecting portion (2c1) fixed with the magnetic disc (2d) is further formed in the wheel disc (2c), an installation groove (2d1) is formed in one surface, opposite to the wheel disc (2c), of the magnetic disc (2d), the attraction portion (2b) is formed by the magnetic disc (2d) and the flange connecting portion (2c1), and the installation cavity (2b1) is formed by the groove wall surfaces of the flange connecting portion (2c1) and the installation groove wall surface of the installation groove (2d 1).

9. The electromagnetic loss clutch assembly according to claim 1, wherein the belt pulley (2) is of a split structure, the belt pulley (2) includes a wheel disc (2c) and a magnetic disc (2d) which are fixed separately, the magnetic disc (2d) is located between the wheel disc (2c) and the coupling plate (4), the groove (2a) is arranged on the wheel disc (2c), a flange connecting portion (2c1) fixed with the magnetic disc (2d) is further arranged on the wheel disc (2c), a groove (2c2) is arranged on a face of the flange connecting portion (2c1) opposite to the magnetic disc (2d), the magnetic disc (2d) and the flange connecting portion (2c1) form the attraction portion (2b), and a groove wall surface of the groove (2c2) and the magnetic disc (2d) enclose the installation cavity (2b 1).