CN218063146U

CN218063146U - Electromagnetic clutch

Info

Publication number: CN218063146U
Application number: CN202222287104.8U
Authority: CN
Inventors: 郭意境; 郑婧
Original assignee: Jinhua Langli Auto Parts Co ltd
Current assignee: Jinhua Langli Auto Parts Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-16
Anticipated expiration: 2032-08-29

Abstract

The utility model discloses an electromagnetic clutch, which comprises a driving wheel, an electromagnetic unit and a driven disc assembly, wherein the driving wheel is in driving connection with an external driving source, the driving wheel comprises a hollow shaft sleeve positioned in the center and a wheel body positioned at the periphery of the hollow shaft sleeve, and a bearing is assembled in the hollow shaft sleeve; a connecting wall is supported between the wheel body and the hollow shaft sleeve, the connecting wall is matched with the driving wheel to form a first assembling groove for accommodating the driven disc assembly, the driven disc assembly is embedded in the first assembling groove and has the same rotating shaft with the driving wheel, and the driven disc assembly and the connecting wall have an axial gap in the axial direction of the driving wheel; the electromagnetic unit is provided with an electromagnetic coil, axial clearance between the driving wheel and the driven disc component disappears by electrifying the electromagnetic coil, and the driven disc component is adsorbed on the driving wheel to realize linkage of the driving wheel and the driven disc component. The utility model discloses an electromagnetic clutch compact structure, easy assembly is maintained.

Description

Electromagnetic clutch

Technical Field

The utility model belongs to the technical field of the clutch, concretely relates to electromagnetic clutch.

Background

The cold chain vehicle is provided with a fan, and when the temperature reaches a set temperature, the fan needs to stop running, so a clutch needs to be arranged between an engine and the fan to cut off or connect the driving connection of the engine and the fan. In order to realize quick response, an electromagnetic clutch is usually configured between an engine and a fan, but a driven disc of the conventional electromagnetic clutch is mostly arranged outside a driving wheel, exposed assembly gaps are too much, the structural integrity is poor, the axial size of the electromagnetic clutch is too large, the overall structure of the clutch is not compact enough, a large amount of assembly space needs to be occupied, the concentricity of the driven disc and the driving wheel is not easy to control, and the assembly and maintenance are inconvenient.

Disclosure of Invention

The utility model discloses to among the prior art electromagnetic clutch structure compact inadequately, the inconvenient problem of assembly maintenance provides an electromagnetic clutch.

The invention aims to be realized by the following technical scheme:

an electromagnetic clutch comprises a driving wheel, an electromagnetic unit and a driven disc assembly, wherein the driving wheel is in driving connection with an external driving source and comprises a hollow shaft sleeve positioned in the center and a wheel body positioned at the periphery of the hollow shaft sleeve, and a bearing is assembled in the hollow shaft sleeve; a connecting wall is supported between the wheel body and the hollow shaft sleeve, the connecting wall is matched with the driving wheel to form a first assembling groove for accommodating the driven disc assembly, the driven disc assembly is embedded in the first assembling groove and has the same rotating shaft with the driving wheel, and the driven disc assembly and the connecting wall have an axial gap in the axial direction of the driving wheel; the electromagnetic unit is provided with an electromagnetic coil, axial clearance between the driving wheel and the driven disc component disappears by electrifying the electromagnetic coil, and the driven disc component is adsorbed on the driving wheel to realize linkage of the driving wheel and the driven disc component.

Preferably, the driven disc assembly includes an armature, a spring piece and a hub, the axial gap is formed between the linking wall and the armature, the spring piece is clamped between the armature and the hub, first bolts fixedly connected with the armature and second bolts fixedly connected with the hub are circumferentially arranged at intervals on the spring piece, and the spring piece can elastically deform in the axial direction. When the electromagnetic coil is electrified, magnetic force is generated, the armature moves under the action of the electromagnetic force, the spring piece is deformed, the axial gap disappears, the driving wheel and the armature are attracted together, and the clutch is in a joint state; when the coil is powered off, the magnetic force disappears, the armature resets under the action of the elastic force of the spring piece, the axial gap recovers, and the clutch is in a separation state.

Preferably, the hub comprises a disc body and a columnar assembly part, the assembly part extends towards the central hole of the bearing, and a tapered hole used for being matched with the tapered section of the fan rotating shaft is formed in the assembly part. The setting of bell mouth can improve dish hub and fan pivot concentricity.

Preferably, the plate body is provided with a measuring hole for a measuring tool to extend into, the spring piece is an annular piece, and the central hole of the spring piece can avoid the measuring tool. The size of the axial clearance directly influences the clutch reliability and the torque transmission efficiency of the clutch, and the driven disc assembly is embedded in the driving wheel, so that the axial clearance cannot be directly measured from the side surface, measuring holes are formed in the disc body, the distance between the hub and the armature can be respectively measured in the power-on state and the power-off state of the electromagnetic coil, the axial clearance is measured, and the assembling precision of the clutch is guaranteed.

Preferably, the three measuring holes are formed and evenly distributed around the periphery of the assembling portion. Three measuring aperture can realize three point range finding, and a face is confirmed to three points to improve measured data's accuracy, and the concentricity of guarantee dish hub and armature and action wheel.

Preferably, the hollow shaft sleeve has a first end face facing the driven disc assembly and a second end face facing away from the driven disc assembly along the axial direction, wherein the first end face and the engaging wall are located on the same plane. Above-mentioned setting can further reduce the axial dimensions of action wheel, guarantees that first assembly groove has sufficient degree of depth to make full use of action wheel inner space.

Preferably, a second assembling groove for accommodating the electromagnetic coil is formed between the hollow shaft sleeve and the wheel body, the second assembling groove is annular, and the second assembling groove and the first assembling groove are respectively arranged on two sides of the joint wall.

Preferably, a fan shell is covered and buckled on the second end face of the hollow shaft sleeve, the electromagnetic coil is fixedly arranged on the fan shell, and the driving wheel has circumferential freedom degree relative to the electromagnetic coil and the fan shell.

Preferably, the peripheral wall of the wheel body is provided with a belt groove for assembling a belt.

Compared with the prior art, the utility model discloses following beneficial effect has: by optimizing the structure of the driving wheel, the driven disc component and the electromagnetic ring are embedded in the driving wheel, the compactness of the whole structure of the clutch is improved, the assembly space is saved, and the concentricity of all the components is easy to control; the measuring hole is formed in the disk hub, so that the axial clearance between the armature and the connecting wall can be accurately controlled, the assembling precision of the clutch is guaranteed, and the running reliability of the clutch is improved; the assembly position and the assembly mode of the driven disc assembly and the electromagnetic ring are reasonable, all the parts are reliable in matching, and the assembly and the maintenance are easy.

Drawings

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

FIG. 2 is a schematic structural view of a driving wheel and a driven wheel assembly of the present invention;

FIG. 3 is a schematic view of the structure of the driving wheel of the present invention;

fig. 4 is a schematic structural view of the driven plate assembly of the present invention;

FIG. 5 is a schematic view of the spring plate structure of the present invention;

fig. 6 is a schematic structural view of the central hub of the present invention;

the labels in the figure are: a driving wheel 10; a hollow shaft sleeve 11; a wheel body 12; a belt groove 121; a joining wall 13; a bearing 20; a driven disk assembly 30; an armature 31; a spring plate 32; a hub 33; a tray body 331; a measuring hole 3311; the fitting portion 332; a tapered bore 3321; a first bolt 34; a second bolt 35; a stud 36; a fan housing 40; an electromagnetic unit 50; an electromagnetic coil 51.

Detailed Description

The invention will be further described with reference to the embodiments shown in the drawings to which:

as shown in fig. 1-6, the present embodiment discloses an electromagnetic clutch, which comprises a driving pulley 10, an electromagnetic unit 50 and a driven plate assembly 30, wherein the driving pulley 10 is connected with an engine through a belt, the driving pulley 10 comprises a hollow shaft sleeve 11 located at the center and a wheel body 12 located at the periphery of the hollow shaft sleeve 11, and a bearing 20 is assembled in the hollow shaft sleeve 11; a connecting wall 13 is supported between the wheel body 12 and the hollow shaft sleeve 11, the connecting wall 13 is matched with the driving wheel 10 to form a first assembling groove for accommodating the driven disc assembly 30, the driven disc assembly 30 is embedded in the first assembling groove and has the same rotating shaft with the driving wheel 10, and an axial gap is formed between the driven disc assembly 30 and the connecting wall 13 in the axial direction of the driving wheel 10; the electromagnetic unit 50 has an electromagnetic coil 51, and when the electromagnetic coil 51 is energized, the axial gap between the driving pulley 10 and the driven pulley assembly 30 is eliminated, and the driven pulley assembly 30 is attracted to the driving pulley 10 to realize linkage of the driving pulley 10 and the driven pulley assembly.

The driven disc assembly 30 includes an armature 31, a spring piece 32 and a hub 33, the axial gap is formed between the connecting wall 13 and the armature 31, the spring piece 32 is clamped between the armature 31 and the hub 33, the spring piece 32 is circumferentially provided with three first bolts 34 fixedly connected with the armature 31 and three second bolts 35 fixedly connected with the hub 33 at intervals, and the first bolts 34 and the second bolts 35 are alternately arranged to ensure that the spring piece 32 can be elastically deformed in the axial direction. When the electromagnetic coil 51 is electrified, magnetic force is generated, the armature 31 moves under the action of the electromagnetic force, the spring piece 32 deforms, the axial gap disappears, the driving wheel 10 and the armature 31 are attracted together, the clutch is in a joint state, two end faces of the joint wall 13, which are opposite to the armature 31, are friction faces, and the driving wheel 10 transmits torque to the driven disc assembly 30; when the coil is powered off, the magnetic force disappears, the armature 31 resets under the action of the elastic force of the spring piece 32, the axial gap recovers, the clutch is in a separation state, and the linkage between the driving wheel 10 and the driven disc assembly 30 disappears.

The hub 33 comprises a disc body 331 and a cylindrical assembling portion 332, the assembling portion 332 extends into a central hole of the bearing 20, the fan rotating shaft comprises a cylindrical section and a conical section, a conical hole 3321 used for being matched with the conical section of the fan rotating shaft is formed in the assembling portion 332, the fan rotating shaft extends from the other end of the hollow shaft sleeve 11, the cylindrical section of the fan rotating shaft is matched with the bearing 20, the conical section of the fan rotating shaft is matched with the conical hole 3321, the arrangement of the conical hole 3321 can improve the concentricity of the hub 33 and the fan rotating shaft, and the hub 33 and the conical section of the fan rotating shaft are arranged; the stud 36 is connected to drive the fan shaft to rotate together when the driven plate assembly 30 rotates.

The plate body 331 is provided with a measuring hole 3311 into which a measuring tool extends, and the spring piece 32 is an annular piece, and a central hole of the annular piece can avoid the measuring tool. The size of the axial clearance directly influences the clutch reliability and the torque transmission efficiency of the clutch, and because the driven disc component 30 is embedded in the driving wheel 10 and cannot directly measure the axial clearance from the side surface, a measuring hole 3311 is formed in the disc body 331, so that the distance between the hub 33 and the armature 31 can be respectively measured in the power-on state and the power-off state of the electromagnetic coil 51, the axial clearance is measured, and the assembly precision of the clutch is guaranteed; the three measuring holes 3311 are formed and uniformly distributed around the periphery of the assembly portion 332 to realize three-point distance measurement, and three points determine one surface to improve the accuracy of measured data and ensure the concentricity of the hub 33, the armature 31 and the driving wheel 10.

The hollow shaft sleeve 11 is provided with a first end face facing the driven disc assembly 30 and a second end face deviating from the driven disc assembly 30 along the axial direction, wherein the first end face and the connecting wall 13 are positioned on the same plane so as to further reduce the axial size of the driving wheel 10 and ensure that the first assembling groove has enough depth to fully utilize the inner space of the driving wheel 10; a second assembling groove for accommodating the electromagnetic coil 51 is formed between the hollow shaft sleeve 11 and the wheel body 12, the second assembling groove is annular, the electromagnetic coil 51 is embedded in the second assembling groove, and the second assembling groove and the first assembling groove are respectively arranged at two sides of the connecting wall 13; a belt groove 121 for assembling a belt is formed on the outer circumferential wall of the wheel body 12.

The hollow shaft sleeve 11 is covered and buckled with the fan shell 40 on the second end surface, the electromagnetic coil 51 is fixedly arranged on the fan shell 40, and the driving wheel 10 has circumferential freedom degree relative to the electromagnetic coil and the fan shell 40, namely, when the driving wheel 10 rotates, the fan shell 40 and the electromagnetic coil 51 are kept still.

It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be understood in an open meaning, i.e., in a meaning equivalent to "comprising at least … …", and not in a closed meaning, i.e., in a meaning not to be understood as "comprising only … …". The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

The above description is only the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should be able to make changes, modifications, additions or substitutions within the scope of the present invention.

Claims

1. An electromagnetic clutch comprises a driving wheel, an electromagnetic unit and a driven disc assembly, and is characterized in that the driving wheel is in driving connection with an external driving source and comprises a hollow shaft sleeve positioned in the center and a wheel body positioned at the periphery of the hollow shaft sleeve, and a bearing is assembled in the hollow shaft sleeve; a connecting wall is supported between the wheel body and the hollow shaft sleeve, the connecting wall is matched with the driving wheel to form a first assembling groove for accommodating the driven disc assembly, the driven disc assembly is embedded in the first assembling groove and has the same rotating shaft with the driving wheel, and the driven disc assembly and the connecting wall have an axial gap in the axial direction of the driving wheel; the electromagnetic unit is provided with an electromagnetic coil, axial clearance between the driving wheel and the driven disc component disappears by electrifying the electromagnetic coil, and the driven disc component is adsorbed on the driving wheel to realize linkage of the driving wheel and the driven disc component.

2. The electromagnetic clutch according to claim 1, wherein the driven disc assembly includes an armature, a spring plate, and a hub, the axial gap is formed between the engagement wall and the armature, the spring plate is sandwiched between the armature and the hub, and the spring plate is provided with first bolts fixedly connected to the armature and second bolts fixedly connected to the hub at intervals in a circumferential direction, and the spring plate is elastically deformable in an axial direction thereof.

3. The electromagnetic clutch of claim 2 wherein the hub includes a disk body and a cylindrical mounting portion, the mounting portion extending toward the bearing and having a tapered bore formed therein for mating with a tapered section of the fan shaft.

4. The electromagnetic clutch according to claim 3, wherein the plate body is provided with a measuring hole into which a measuring tool extends, and the spring plate is an annular plate, and a central hole of the spring plate can avoid the measuring tool.

5. The electromagnetic clutch of claim 4 wherein the three measuring holes are provided and evenly distributed around the periphery of the mounting portion.

6. An electromagnetic clutch according to any one of claims 1 to 5 wherein the hollow sleeve has a first end facing axially towards the driven disc assembly and a second end facing axially away from the driven disc assembly, the first end being coplanar with the engagement wall.

7. An electromagnetic clutch according to claim 6 wherein a second mounting groove for receiving the electromagnetic coil is formed between the hollow sleeve and the wheel body, the second mounting groove being annular, the second mounting groove and the first mounting groove being provided on opposite sides of the engagement wall.

8. The electromagnetic clutch of claim 7 wherein the second end surface of the hollow sleeve is capped by a fan housing, the electromagnetic coil is secured to the fan housing, and the drive sprocket has circumferential freedom relative to the electromagnetic coil and the fan housing.

9. The electromagnetic clutch according to claim 1, wherein a belt groove for mounting a belt is formed in an outer circumferential wall of the wheel body of the drive wheel.