High-reliability electromagnetic clutch braking device

Abstract

The invention discloses an electromagnetic clutch brake device which comprises a magnet seat, a coil, a brake pad assembly, a microswitch, a handle, a spring, a limiting steel ball and a thrust shaft, an annular groove is formed in one side face of the magnet seat, and the coil is arranged in the annular groove in a filling and sealing mode and leads out a wire to be connected to the microswitch; a stepped hole is formed in the position, around the center of the annular groove, of the magnet base, the thrust shaft is rotatably installed in the stepped hole, and the spring is elastically connected between the flange end of the thrust shaft and the stepped face of the stepped hole. The brake pad assembly is located on the opposite side of the annular groove. The handle is fixedly connected with the thrust shaft and is connected with the microswitch through a rotating clutch; the limiting steel ball is arranged between the handle and the magnet seat, so that the handle rotates to drive the thrust shaft to be far away from the brake pad assembly; and concave-convex lines are arranged on the other side surface and the circumferential surface of the magnet seat. The device can improve the heat conduction efficiency and the heat dissipation capability, thereby effectively improving the stability and reliability of the electromagnetic clutch brake device.

Description

Technical Field

[0001] The invention belongs to the field of electromagnetic electric technology and relates to a high-reliability electromagnetic clutch brake device. Background Art

[0002] The electromagnetic clutch brake is a magnetic circuit composed of an excitation coil, a magnet seat and an attractive iron sheet.

[0003] When the excitation coil is energized, the electromagnetic attraction overcomes the spring force to attract the attracting iron sheet 5 and the magnet seat 1 together, so that the friction plate 8 between the attracting iron sheet 5 and the fixed iron sheet 4 is in a free state, and the electromagnetic clutch brake device is in a non-braking state.

[0004] When the excitation coil is powered off, the electromagnetic attraction is lost, and the spring force pushes the attracting iron sheet toward the fixed iron sheet, so that the friction plate between the attracting iron sheet and the fixed iron sheet is in a compressed state, and the electromagnetic clutch brake device is in a braking state.

[0005] like Figure 1 As shown, the excitation coil of the existing electromagnetic clutch brake device is wound on the frame, and the frame and the magnet seat are in poor contact, which reduces the heat conduction efficiency; the outer surface of the magnet seat is a smooth surface, which has the disadvantages of small radiation area and poor radiation heat dissipation capacity. When the above-mentioned electromagnetic clutch brake device is used, its excitation coil is in the power-on working mode, which will cause the coil to heat up, the temperature to rise, the resistance to increase, the excitation current to decrease, the electromagnetic attraction force to decrease, the clutch to release prematurely, and cause unnecessary braking. Therefore, improving the heat dissipation capacity of the brake and controlling the temperature rise of the coil are important indicators of the working stability and reliability of the clutch brake device. Summary of the invention

[0006] In order to solve the above technical problems existing in the prior art, the present invention provides a high-reliability electromagnetic clutch brake device, which reduces the coil temperature rise by improving the heat conduction efficiency and increasing the heat dissipation area, and can realize manual brake release. The specific technical solution is as follows: An electromagnetic clutch brake device comprises a brake mechanism and a switch mechanism, wherein the brake mechanism comprises a magnet seat, a coil, and a brake pad assembly, wherein the switch mechanism comprises a micro switch, a handle, a spring, a limit steel ball and a thrust shaft, wherein a side surface of the magnet seat is provided with an annular groove, wherein the coil is potted and arranged in the annular groove and a lead wire is connected to the micro switch; a stepped hole is arranged on the magnet seat at the center of the annular groove, wherein the thrust shaft can be rotatably installed in the stepped hole, wherein one end of the thrust shaft is provided with an internal threaded hole and the other end is a flange end; wherein the spring is elastically connected between the flange end of the thrust shaft and the stepped surface in the stepped hole; wherein the brake pad assembly is located on the opposite side of the annular groove; wherein the handle is located on the other side surface of the magnet seat and is fixedly connected to one end of the thrust shaft and is connected to the micro switch by a rotating clutch; wherein the limit steel ball is arranged between the handle and the magnet seat, wherein the handle is rotated to drive the thrust shaft away from the brake pad assembly; wherein the other side surface and the circumferential surface of the magnet seat are provided with concave-convex patterns.

[0007] Furthermore, the coil is bound by rolling strips and then fixed and packaged in the annular groove by potting glue.

[0008] Furthermore, the brake pad assembly includes an axially connected attractive iron plate, a friction plate and a fixed iron plate, the attractive iron plate is arranged on the opposite side of the annular groove, the fixed iron plate is located on the opposite side of the attractive iron plate and is limited and fixed with the magnet seat, and the friction plate gap is configured between the fixed iron plate and the attractive iron plate.

[0009] Furthermore, the fixed iron sheet and the magnet seat are fixed by screws, and a gap limiting sleeve is provided on the outer sleeve of the screw to space them by a fixed distance.

[0010] Furthermore, a notch is provided on the side of the annular groove, and the incoming and outgoing wires of the coil are connected to the micro switch through the notch.

[0011] Furthermore, the handle comprises a grip portion and a rotating portion, the grip portion is provided with a grip cover, and the rotating portion is movably mounted on the other side of the magnet seat and connected to the micro switch via a rotating clutch.

[0012] Furthermore, a connecting hole, three limiting holes and a limiting groove are provided on the rotating part, a limiting screw is provided on the other side of the magnet seat, and the limiting steel balls are arranged in a triangular distribution; the connecting hole is connected to one end of the thrust shaft through a fixing screw, the three limiting holes correspond to the positions of the three limiting steel balls respectively, and the limiting groove is correspondingly connected to the limiting screw.

[0013] Beneficial effect: The electromagnetic clutch brake device of the present invention improves the heat conduction efficiency and heat dissipation capacity by encapsulating the coil with glue and increasing the heat dissipation area, thereby reducing the temperature rise of the coil, effectively improving the stability and reliability of the electromagnetic clutch brake device, and the braking state of the device can be effectively contacted through the set switch mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of an existing electromagnetic clutch brake device with a coil frame; Figure 2 It is a schematic structural diagram of a high-reliability electromagnetic clutch brake device according to an embodiment of the present invention; Figure 3 yes Figure 2 Right view of; Figure 4 yes Figure 3 Cross-sectional view of the middle DD segment; Figure 5 is a schematic structural diagram of a magnet base according to an embodiment of the present invention; Figure 6 yes Figure 5 Right view of; Figure 7 is a schematic diagram of the coil structure of an embodiment of the present invention; Figure 8 Schematic diagram of coil packaging according to an embodiment of the present invention.

[0015] Explanation of the markings in the figure: 1—magnet seat; 2—thrust shaft; 3—gap limit sleeve; 4—fixed iron sheet; 5—attractive iron sheet; 6—limiting steel ball; 7—handle; 8—friction plate; 9—handle cover; 10—potting glue; 11—screw; 12—switch fixing screw; 13—spring; 14—fixing screw; 15—limit screw; 16—micro switch; 17—coil; 18—skeleton; 101—other side surface; 102—circumferential surface; 103—notch; 104—inner cavity of magnet seat; 171—incoming wire; 172—outgoing wire; 173—cable tie. DETAILED DESCRIPTION

[0016] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] like Figures 2 to 4 As shown, this embodiment discloses a high-reliability electromagnetic clutch brake device, which includes a switch mechanism and a brake mechanism. The switch mechanism controls the connection brake mechanism and can manually release the device brake.

[0018] The switch mechanism includes a thrust shaft 2, a spring 13, a fixing screw 14, a handle 7 and a micro switch 16. The brake mechanism includes a magnet seat 1, a coil 17, an attracting iron sheet 5, a friction sheet 8 and a fixing iron sheet 4. The attracting iron sheet 5, the friction sheet 8 and the fixing iron sheet 4 are axially connected.

[0019] A circular groove is provided on one side of the magnet seat 1, and the circular groove serves as the inner cavity 104 of the magnet seat for placing the coil 17, and the coil 17 is fixed therein after being bound by a rolling strip 173 and then by a potting glue 10. A limiting screw 15 and three limiting steel balls 6 are provided on the other side of the magnet seat 1, and the limiting steel balls 6 are arranged in a triangular distribution.

[0020] On the magnet seat 1, a stepped hole is arranged at the center of the annular groove. The thrust shaft 2 is rotatably mounted in the stepped hole, one end of which is provided with an internal threaded hole and the other end is provided with a flange end. The spring 13 is arranged between the flange end of the thrust shaft 2 and the stepped surface in the stepped hole. The attracting iron sheet 5 is located on the opposite side of the annular groove.

[0021] The fixed iron sheet 4 is located at the opposite side of the attracting iron sheet 5 and is fixed to the magnet seat 1. Specifically, the fixed iron sheet 4 and the magnet seat 1 are fixed by screws 11, and a gap limiting sleeve 3 is provided on the screw sleeve to space a fixed distance.

[0022] The friction plate 8 is disposed in a gap between the fixed iron plate 4 and the attracting iron plate 5 .

[0023] The annular groove has a notch 103 on its side for leading out the incoming wire 171 and outgoing wire 172 of the coil 17. The micro switch 16 is installed on the other side of the magnet base 1 by means of the switch fixing screw 12 according to the position of the notch 103. The incoming wire 171 and outgoing wire 172 of the coil 17 are connected to the micro switch 16. Figure 7 and Figure 8 As shown, The handle 7 includes a handle portion and a rotating portion, the handle portion is provided with a handle cover 9, the rotating portion is movably mounted on the other side of the magnet seat 1, and is connected to the micro switch 16 through a rotating clutch. Specifically, a connecting hole, three limiting holes and a limiting slide groove are provided on the rotating portion, the connecting hole is connected to one end of the thrust shaft 2 through a fixing screw 14, the three limiting holes correspond to the positions of the three limiting steel balls 6 respectively, and the limiting slide groove is connected to the limiting screw 15 accordingly.

[0024] In the default state, the outer edge of the rotating part of the handle 7 is connected to the micro switch 16, and the limit steel ball 6 is located in the corresponding limit hole. When the coil 17 is energized, the electromagnetic attraction attracts the attracting iron sheet 5 and the magnet seat 1 together; when the coil 17 is de-energized, the attracting iron sheet 5 is not affected by the magnetic force, and the thrust shaft 2 is pushed toward the fixed iron sheet 4 through the elastic force of the spring 13, so that the friction plate 8 between the attracting iron sheet 5 and the fixed iron sheet 4 is in a compressed state. When the handle 7 rotates along the limit slide groove until its upper edge is separated from the micro switch 16, the limit steel ball 6 pushes the handle 7 away from the magnet seat 1, and at the same time drives the thrust shaft 2 to move in the direction of the compression spring 13, so that the friction plate 8 is always in a free state without braking.

[0025] like Figure 5 and Figure 6 As shown, the coil 17 is fixed in the inner cavity 104 of the magnet seat by the potting glue 10, so that the heat generated by the coil 17 is efficiently transferred to the magnet seat 1, thereby improving the heat conduction efficiency. The other side surface 101 and the circumferential surface 102 of the magnet seat 1 have convex and concave patterns to increase the heat radiation heat dissipation area.

[0026] The high-reliability electromagnetic clutch brake device of the present invention improves the heat conduction efficiency and heat dissipation capacity by encapsulating the coil 17 with glue and increasing the heat dissipation area, thereby reducing the temperature rise of the coil 17 and effectively improving the stability and reliability of the electromagnetic clutch brake device.

[0027] In addition, the potting setting of the coil 17 is also beneficial to reducing the vibration and noise of the electromagnetic clutch brake device, and is beneficial to extending the service life of the brake device.

[0028] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A high-reliability electromagnetic clutch brake device, comprising a brake mechanism and a switch mechanism, characterized in that: The brake mechanism comprises a magnet seat (1), a coil (17), and a brake pad assembly; the switch mechanism comprises a micro switch (16), a handle (7), a spring (13), a limit steel ball (6), and a thrust shaft (2); a side surface of the magnet seat (1) is provided with an annular groove; the coil (17) is potted and arranged in the annular groove and a lead wire is connected to the micro switch (16); a stepped hole is arranged on the magnet seat (1) at the center of the annular groove; the thrust shaft (2) is rotatably mounted in the stepped hole; one end of the thrust shaft (2) is provided with an internal threaded hole and the other end is a flange end; the spring ( 13) is elastically connected between the flange end of the thrust shaft (2) and the stepped surface in the stepped hole; the brake pad assembly is located on the opposite side of the annular groove; the handle (7) is located on the other side (101) of the magnet seat (1) and is fixedly connected to one end of the thrust shaft (2), and is connected to the micro switch (16) through a rotating clutch; the limit steel ball (6) is connected and arranged between the handle (7) and the magnet seat (1), so that the handle (7) drives the thrust shaft (2) away from the brake pad assembly after rotation; the other side (101) and the circumferential surface (102) of the magnet seat (1) are provided with concave and convex patterns.

2. The electromagnetic clutch brake device according to claim 1, characterized in that: The coil (17) is bound by a rolling strip (1173) and then fixedly encapsulated in the annular groove by a potting glue (10).

3. The electromagnetic clutch brake device according to claim 1, characterized in that: The brake pad assembly comprises an axially connected attracting iron sheet (5), a friction sheet (8) and a fixed iron sheet (4), wherein the attracting iron sheet (5) is arranged on the opposite side of the annular groove, the fixed iron sheet (4) is located on the opposite side of the attracting iron sheet (5) and is fixed to the magnet seat (1), and the friction sheet (8) is gap-arranged between the fixed iron sheet (4) and the attracting iron sheet (5).

4. The electromagnetic clutch brake device according to claim 3, characterized in that: The fixed iron sheet (4) and the magnet seat (1) are fixed by means of screws (11), and a gap limiting sleeve (3) is provided on the outer sleeve of the screw (11) to space them at a fixed distance.

5. The electromagnetic clutch brake device according to claim 1, characterized in that: A notch (103) is provided on the side of the annular groove, and an incoming wire (171) and an outgoing wire (172) of the coil (17) are connected to the micro switch (16) through the notch (103).

6. The electromagnetic clutch brake device according to claim 1, characterized in that: The handle (7) comprises a grip portion and a rotating portion, the grip portion being provided with a grip cover (9), and the rotating portion being movably mounted on the other side of the magnet seat (1) and connected to the micro switch (16) via a rotating clutch.

7. The electromagnetic clutch brake device according to claim 6, characterized in that: The rotating part is provided with a connecting hole, three limiting holes and a limiting sliding groove, the other side of the magnet seat (1) is provided with a limiting screw (15), and the limiting steel balls (6) are arranged in a triangular distribution; the connecting hole is connected to one end of the thrust shaft (2) through a fixing screw (14), the three limiting holes correspond to the positions of the three limiting steel balls (6), and the limiting sliding groove is connected to the limiting screw (15) accordingly.

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