An electromagnetic actuator for an electromagnetic clutch

Abstract

The utility model discloses an electromagnetic actuator for electromagnetic clutch, including electromagnetic coil subassembly, shell, apron, armature subassembly, and electromagnetic coil subassembly includes coil and coil framework, and coil framework ring package coil, and shell is located coil framework outside, and apron is located coil framework outside, and shell is cooperated with apron, and the assembly space is formed between shell and apron, and the extension is set up on armature subassembly, and extension is located in assembly space, and the magnetic separation part is set up on coil framework, and the magnetic separation part is located between extension and shell to prevent the magnetic force attraction armature subassembly after shell energization. The utility model's solution above-mentioned shell and apron magnetization simultaneously to the opposite direction attraction armature makes work efficiency reduce, and energy consumption increases, and armature is magnetized by apron to make the tooth disc magnetization influence the follow -up work.

Description

Technical Field

[0001] This utility model relates to the field of clutch technology, specifically to an electromagnetic actuator for an electromagnetic clutch. Background Technology

[0002] An electromagnetic clutch is a friction clutch that uses electromagnetic force for remote control. It relies on the switching of an energized coil to control the clutch's engagement and disengagement, and is widely used in machine tools and mechanical transmission systems. Its working principle is based on electromagnetic induction and friction, enabling functions such as rapid starting, braking, forward and reverse rotation, or speed regulation of mechanical transmission components.

[0003] Electromagnetic induction is achieved through an electromagnetic actuator, which is typically connected to a geared clutch. The actuator consists of a coil winding, a housing, a cover plate, and an armature. The coil winding is located in the center, while the housing and cover plate are located outside the winding and connected. When energized, the coil winding magnetizes the cover plate, which then attracts the armature through magnetic force. The armature, drawn towards the cover plate, presses against the geared clutch. However, energizing the housing also magnetizes the housing, which in turn exerts a magnetic force on the armature, pulling it towards the housing opposite the cover plate. This significantly reduces the cover plate's attraction to the armature, lowering efficiency and increasing energy consumption. Furthermore, since the armature, attracted by the cover plate, remains in a pressing position against the geared clutch, and may also become magnetized under the cover plate's magnetic force, this magnetization can be further conducted to the geared clutch, affecting its subsequent operation. Utility Model Content

[0004] This utility model provides an electrical actuator for an electromagnetic clutch. The technical solution of this utility model to solve the above-mentioned problems of reduced working efficiency and increased energy consumption caused by the simultaneous magnetization of the outer shell and the cover plate attracting the armature in opposite directions, and the magnetization of the armature by the cover plate thus magnetizing the gear plate and affecting subsequent work is as follows:

[0005] An electromagnetic actuator for an electromagnetic clutch includes an electromagnetic coil assembly, a housing, a cover plate, and an armature assembly. The electromagnetic coil assembly includes a coil and a coil frame, with the coil frame encircling the coil. The housing is located outside the coil frame, and the cover plate is located outside the coil frame. The housing and the cover plate mate to form an assembly space. The armature assembly has an extension located within the assembly space. The coil frame has a magnetic shielding part located between the extension and the housing to prevent the housing from generating a magnetic force that attracts the armature assembly when energized.

[0006] Furthermore, the armature assembly includes an outer ring and an inner ring. The outer ring is made of a soft magnetic material, and the inner ring is made of plastic used to isolate magnetic force transmission. The outer ring and the inner ring are fixed together.

[0007] Furthermore, a radial stepped hole is provided on the inner circumferential surface of the outer ring, and a first concave portion is arranged on one or both sides of the stepped hole.

[0008] Furthermore, a positioning post is provided on the outer circumferential surface of the inner ring, and a first protrusion is also provided on the outer circumferential surface of the inner ring. The first protrusion is arranged on one or both sides of the positioning post. The positioning post is engaged with the stepped hole, and the first protrusion is engaged with the first concave part.

[0009] Furthermore, the inner circumferential surface of the outer ring is provided with a mounting hole, and the outer circumferential surface of the inner ring is provided with a positioning protrusion, which cooperates with the mounting hole.

[0010] In this invention, the outer shell and cover plate are located outside the electromagnetic coil, forming an assembly space between them. The armature assembly has an extension located within the assembly space. The coil frame in the electromagnetic coil has a magnetic shielding part located between the extension and the outer shell. This magnetic shielding part has the advantage of being able to prevent the outer shell from attracting the armature after generating magnetic force. In addition, the outer ring of the armature is made of soft magnetic material, and the inner ring is made of plastic material. The outer ring mates with the gear plate, and the inner ring mates with the cover plate. The outer ring and the inner ring are connected by a plastic coating process, which provides strong stability. The plastic material is insulating and has the advantage of preventing the armature from becoming magnetized, thus preventing the magnetic force from being transmitted to the gear plate and causing the gear plate to become magnetized. Attached Figure Description

[0011] Figure 1 This is a three-dimensional diagram of an electromagnetic clutch.

[0012] Figure 2 This is a cross-sectional view of an electromagnetic clutch.

[0013] Figure 3 This is a three-dimensional diagram of the armature.

[0014] Figure 4 This is a cross-sectional view of the armature assembly in the first position.

[0015] Figure 5 for Figure 4 The exploded diagram.

[0016] Figure 6 This is a cross-sectional view of the armature assembly at the second position.

[0017] Figure 7 for Figure 6 The exploded diagram.

[0018] A cross-sectional view of the armature and a cross-sectional view of the armature step hole.

[0019] 1. Outer shell, 2. Cover plate, 2a. Assembly space, 3. Coil, 4. Magnetic shielding part, 4a. Outer ring, 5. Extension part, 5a. Step hole, 5b. Mounting hole, 5c. First inner recess, 5d. Inner ring, 6. Top, 6a. Positioning post, 6b. Positioning protrusion, 6c. First protrusion, 6d. Wire interface, 6d. Gear plate, 6d. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 4 As shown, an electromagnetic actuator for an electromagnetic clutch includes an electromagnetic coil assembly, a housing 1, a cover plate 2, and an armature assembly. The electromagnetic coil assembly includes a coil 3 and a coil frame 4, with the coil frame 4 encircling the coil 3. The housing 1 is located outside the coil frame 4, and the cover plate 2 is located outside the coil frame 4. The housing 1 and the cover plate 2 cooperate with each other. In this invention, the housing 1 and the cover plate 2 are fixed as one piece, for example, by screws. An assembly space 2a is formed between the housing 1 and the cover plate 2. An extension 5a is provided on the armature assembly, and the extension 5a is located within the assembly space 2a. A magnetic shielding part 4a is provided on the coil frame 4, and the magnetic shielding part 4a is located between the extension 5a and the housing 1 to prevent the housing 1 from generating a magnetic force to attract the armature assembly after energization.

[0022] like Figure 3 As shown, the armature assembly includes an outer ring 5 and an inner ring 6. The outer ring 5 is fitted with a cover plate 2, and the inner ring 6 is generally fitted with a toothed disc B. The outer ring 5 is made of a soft magnetic material, which is easy to be attracted by the cover plate 2. The inner ring 6 is made of plastic used to isolate the magnetic force conduction, thus isolating the magnetic force on the armature assembly from the toothed disc B. The outer ring 5 and the inner ring 6 are fixed together by a plastic coating process.

[0023] The outer ring 5 has a radial stepped hole 5b on its inner circumferential surface, and the outer ring 5 also has a first recessed portion 5d located on one or both sides of the stepped hole 5b.

[0024] The outer circumferential surface of the inner ring 6 is provided with a positioning post 6b, and the outer circumferential surface of the inner ring 6 is also provided with a first protrusion 6d. The first protrusion 6d is arranged on one or both sides of the positioning post 6b. The positioning post 6b mates with the stepped hole 5b, and the first protrusion 6d mates with the first concave portion 5d. This embodiment has the function of radial tension to prevent separation, while ensuring that the outer ring 5 and the inner ring 6 do not shift. This connection method is used for axial fixation and bearing axial loads. The inner ring 6 is also provided with a stop 6a for applying force to the disk, and the stop 6a is fixed to the first protrusion 6d.

[0025] The outer ring 5 has a mounting hole 5c on its inner circumferential surface, and the inner ring 6 has a positioning protrusion 6c on its outer circumferential surface. The positioning protrusion 6c cooperates with the mounting hole 5c.

[0026] The specific working process of this utility model is as follows:

[0027] After the wire interface A is energized, the coil winding is energized, causing the cover plate 2 to become magnetic. Similarly, the outer shell 1 will also become magnetic. The armature assembly that cooperates with the cover plate 2 moves towards the cover plate 2 under the magnetic attraction of the cover plate 2 until the armature assembly and the toothed disk B come into contact. Since the outer shell 1 will also be magnetized after being energized, the outer shell 1 will generate an attraction force in the opposite direction to the armature assembly. However, in this utility model, a magnetic shielding part 4a is provided on the coil frame 5. The magnetic shielding part 4a is located between the outer shell 1 and the armature assembly, blocking the magnetic attraction force of the outer shell 1 on the armature assembly. In addition, the armature assembly is divided into an outer ring 5 and an inner ring 6. The outer ring 5 and the inner ring 6 are connected by a plastic coating process. The outer ring 5 is fitted with the cover plate 2, and the inner ring 6 is generally fitted with a toothed disc B. The outer ring 5 is made of soft magnetic material, which is easy to be attracted by the cover plate 2. The outer ring 6 is made of plastic material, which isolates the magnetic force on the armature assembly from the toothed disc B, preventing the armature assembly from becoming magnetized during the process of being attracted by the cover plate 2 and further magnetizing the toothed disc B.

Claims

1. An electromagnetic actuator for an electromagnetic clutch, comprising an electromagnetic coil assembly, a housing (1), a cover plate (2), and an armature assembly, wherein the electromagnetic coil assembly comprises a coil (3) and a coil frame (4), the coil frame (4) encircling the coil (3), the housing (1) being located outside the coil frame (4), the cover plate (2) being located outside the coil frame (4), the housing (1) and the cover plate (2) cooperating, and an assembly space (2a) being formed between the housing (1) and the cover plate (2), characterized in that, An extension (5a) is provided on the armature assembly, and the extension (5a) is located in the assembly space (2a). A magnetic shielding part (4a) is provided on the coil frame (4), and the magnetic shielding part (4a) is located between the extension (5a) and the outer shell (1) to prevent the outer shell (1) from generating a magnetic force to attract the armature assembly after being energized.

2. An electromagnetic actuator for an electromagnetic clutch according to claim 1, characterized in that, The armature assembly includes an outer ring (5) and an inner ring (6). The outer ring (5) is made of soft magnetic material, and the inner ring (6) is made of plastic used to isolate magnetic force transmission. The outer ring (5) and the inner ring (6) are fixed together.

3. An electromagnetic actuator for an electromagnetic clutch according to claim 2, characterized in that, The outer ring (5) has a radial stepped hole (5b) on its inner circumferential surface. The outer ring (5) also has a first recess (5d) located on one or both sides of the stepped hole (5b). The outer circumferential surface of the inner ring (6) is provided with a positioning post (6b) and a first protrusion (6d) is also provided on the outer circumferential surface of the inner ring (6). The first protrusion (6d) is arranged on one or both sides of the positioning post (6b). The positioning post (6b) is engaged with the stepped hole (5b) and the first protrusion (6d) is engaged with the first concave part (5d).

4. An electromagnetic actuator for an electromagnetic clutch according to claim 2, characterized in that, The outer ring (5) has an installation hole (5c) on its inner circumferential surface, and the inner ring (6) has a positioning protrusion (6c) on its outer circumferential surface. The positioning protrusion (6c) cooperates with the installation hole (5c).

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