Coil protection device, brake and motor

Abstract

The utility model discloses a coil protection device, a brake and a motor, and relates to the technical field of brakes, the coil protection device comprises a plurality of first silicon steel sheets, the plurality of first silicon steel sheets are uniformly distributed along the circumferential direction, and each silicon steel sheet is provided with two mutually parallel clamping grooves; the number of the coil frameworks is two, the two coil frameworks are distributed in an annular shape, and the two coil frameworks are embedded into the two clamping grooves in the first silicon steel sheet respectively; according to the scheme, the multi-stage buffer assembly is arranged between the first silicon steel sheet and the second silicon steel sheet, a stepped vibration reduction structure from the rigid contact ring, the elastic deformation layer to the compensation gasket is formed, impact force generated when the first silicon steel sheet and the second silicon steel sheet are attracted is absorbed layer by layer, and the damping effect is improved. Not only can the damage to the coil caused by direct contact be prevented, but also the loosening or displacement of the coil caused by vibration can be avoided, and the stability of the coil is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coil protection device, brake and motor belong to brake technical field. BACKGROUND

[0002] Spring pressurized three-phase alternating current brake is also called power-off brake or safety brake, which is installed on the shaft of three-phase asynchronous motor. Its working principle is as follows: when the electromagnetic coil is not electrified, the spring is pressed on the armature plate (moving plate) to separate the armature plate (moving plate) from the end plate (static plate). The pressure applied by the armature plate (moving plate) on the vane rubs against the brake base (end cover seat) to generate braking torque to prevent the motor from rotating. When the electromagnetic coil is electrified, the coil generates a magnetic field, which makes the brake armature plate (moving plate) attract the end plate (static plate). At this time, the pressure of the vane disappears, and the motor can rotate.

[0003] During production, when the coil winding is completed and placed in the silicon steel sheet slot of the end plate (static plate), although the coil is covered with a layer of insulating tape, the metal surface of the silicon steel sheet slot is easy to scratch the enameled wire. Once the coil assembly is damaged, it will cause insulation damage, insufficient insulation voltage, short circuit, leakage and other risks. Moreover, when the entire brake device is used on the motor, the armature plate (moving plate) and the end plate (static plate) will attract each other when electrified, which will cause collision at the contact surface. After long-term use, it will also cause damage to the coil, deformation of the coil, loosening of the coil structure and other hidden dangers. Utility model content

[0004] The utility model aims at overcoming the defects of the prior art and provides a coil protection device, brake and motor.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of: a coil protection device, comprising

[0006] A plurality of first silicon steel sheets are provided, and the plurality of first silicon steel sheets are uniformly distributed in the circumferential direction. Two parallel clamping grooves are formed on each silicon steel sheet.

[0007] Two coil skeletons are provided, which are annularly distributed, and the two coil skeletons are embedded in the two clamping grooves on the first silicon steel sheet, respectively. First and second stop edges are arranged on both sides of each coil skeleton, respectively. The first and second stop edges form a wire slot therebetween. The wire slot is used for winding the coil. The coil does not exceed the wire slot, and the outer side of the coil is covered with a sealing protective layer.

[0008] A second silicon steel sheet is provided, and the second silicon steel sheet corresponds to the position of the first silicon steel sheet; when the coil is powered, the first silicon steel sheet and the second silicon steel sheet are attracted, and when the coil is powered off, the first silicon steel sheet and the second silicon steel sheet are released;

[0009] A multi-stage buffer assembly is arranged on the contact surface of the first silicon steel sheet and the second silicon steel sheet, and the multi-stage buffer assembly is used to buffer the vibration generated when the first silicon steel sheet and the second silicon steel sheet are attracted.

[0010] Preferably, the multi-stage buffer assembly comprises:

[0011] A compensation gasket is embedded on the attraction surface of the first silicon steel sheet;

[0012] An elastic deformation layer is made of a copper mesh and aramid fiber laminated, the elastic deformation layer is fixed on the compensation gasket, and there is a gap between the elastic deformation layer and the compensation gasket;

[0013] A rigid contact ring is fixed on the elastic deformation layer, and the rigid contact ring contacts the second silicon steel sheet when the first silicon steel sheet and the second silicon steel sheet are attracted.

[0014] Preferably, the rigid contact ring is made of tungsten carbide-based alloy material, and the compensation gasket is made of permalloy material.

[0015] Preferably, the coil former is made of engineering plastic, and the wire slot bottom of the coil former is integrally processed and formed with anti-skid lines.

[0016] Preferably, a plurality of heat dissipation holes are formed on the first silicon steel sheet and the second silicon steel sheet.

[0017] Preferably, the first and second retaining edges are integrally formed on the coil former.

[0018] A brake comprises a coil protection device, a base, an armature plate, an end plate, and a laminated sheet;

[0019] A plurality of corner column screws are uniformly arranged on the base along the circumferential direction thereof, the end plate is connected and fixed at the top end of the plurality of corner column screws, the armature plate is slidingly arranged on the corner column screws between the brake base and the end plate, and the coil protection device is arranged between the armature plate and the end plate.

[0020] The laminated sheet is located between the armature plate and the brake base, and a return spring is arranged on each corner column screw, and the return spring is used to move the armature plate away from the end plate.

[0021] Preferably, the first silicon steel sheet of the coil protection device is fixed on the end plate, and the second silicon steel sheet of the coil protection device is fixed on the armature plate.

[0022] When the coil protection device is powered on, the armature plate moves to the end plate and is attracted to the end plate; when the coil protection device is powered off, the armature plate is driven away from the end plate by the reset spring and drives the reed to rub against the base.

[0023] Preferably, the base is provided with a release movable pin on both sides, the inner end of the release movable pin is matched with the bottom surface of the armature plate, and the outer end of the release movable pin is fixed through a release handle.

[0024] A motor includes a brake.

[0025] Due to the use of the above technical scheme, the utility model has the following advantages compared with the prior art:

[0026] 1. The coil protection device of the utility model forms the stepped damping structure of rigid contact ring, elastic deformation layer to compensation gasket by setting multistage buffer assembly between the first silicon steel sheet and the second silicon steel sheet, absorbs the impact force when the first silicon steel sheet and the second silicon steel sheet are attracted layer by layer, not only can prevent direct contact from causing damage to the coil, but also can avoid the coil loosening or displacement caused by vibration, and the stability of the coil is ensured.

[0027] 2. The sealing protective layer design of the coil framework can enhance the insulation voltage resistance effect of the coil, in addition, the coil is sealed by the sealing protective layer, so that it is isolated from the outside air, which can reduce the influence of the humid environment on the coil and prolong the service life of the coil. BRIEF DESCRIPTION OF DRAWINGS

[0028] The technical scheme of the utility model will be further described below in combination with the drawings:

[0029] ATTACHMENT Figure 1 It is a structure schematic view of the coil protection device of the utility model;

[0030] ATTACHMENT Figure 2 It is a structure schematic view of the first silicon steel sheet of the utility model;

[0031] ATTACHMENT Figure 3 It is a structure schematic view of the coil framework of the utility model;

[0032] ATTACHMENT Figure 4 It is a schematic view of the coil framework of the utility model without the sealing protective layer;

[0033] ATTACHMENT Figure 5 It is a schematic view of the coil framework of the utility model without the sealing protective layer and the coil;

[0034] ATTACHMENT Figure 6 It is a structure schematic view of the multistage buffer assembly of the utility model;

[0035] attached Figure 7 A structure diagram of a brake

[0036] In the figure: 1, the first silicon steel sheet; 11, the clamping groove; 2, the coil framework; 21, the first blocking edge; 22, the second blocking edge; 23, the coil; 24, the anti-skid pattern; 25, the sealing protective layer; 3, the second silicon steel sheet; 4, the multi-stage buffer assembly; 41, the compensation gasket; 42, the elastic deformation layer; 43, the rigid contact ring; 5, the heat dissipation hole; 6, the base; 61, the angle column screw; 611, the reset spring; 62, the release movable pin; 63, the release handle; 7, the armature plate; 8, the end plate; 9, the clamping sheet. DETAILED DESCRIPTION

[0037] The utility model will be made further detailed explanation in combination with the specific embodiment and the accompanying drawings.

[0038] As shown in the attached Figures 1-4 The utility model discloses a coil protection device, containing the first silicon steel sheet 1, the coil framework 2, the second silicon steel sheet 3 and the multi-stage buffer assembly 4.

[0039] The first silicon steel sheet 1 is provided with multiple, multiple first silicon steel sheets 1 evenly distribute along the circumferential direction, and two clamping grooves 11 parallel to each other are formed on each silicon steel sheet; The coil framework 2 is provided with two, two coil frameworks 2 are annularly distributed, and two coil frameworks 2 are embedded in the two clamping grooves 11 on the first silicon steel sheet 1 respectively, so that two coil frameworks 2 are fixed on the first silicon steel sheet 1, and the fixed mode of the clamping groove 11 can save a part of vertical space, so that the volume of the whole device is smaller.

[0040] Among them, the two sides of each coil framework 2 are respectively provided with the first blocking edge 21 and the second blocking edge 22, in the embodiment, the first blocking edge 21 and the second blocking edge 22 are integrally formed on the coil framework 2; The first blocking edge 21 and the second blocking edge 22 form a wire slot, the wire slot is used for winding the coil 23, and the coil 23 does not exceed the wire slot, so as to avoid the outer edge of the coil 23 from contacting the first silicon steel sheet 1, thereby preventing damage to the outer edge of the coil 23.

[0041] In the embodiment, the coil framework 2 is made of engineering plastic, which can effectively isolate the coil 23 and external metal parts by using the insulation characteristics of engineering plastic, prevent current leakage or short circuit, and ensure the stability and safety of the electromagnetic field; At the same time, it can also reduce the deformation stress caused by temperature change and avoid the coil 23 loose;

[0042] As shown in the attached Figure 5 The bottom of the wire slot of the coil framework 2 is integrally processed into the anti-skid pattern 24, and the coil 23 contacts the anti-skid pattern 24 to avoid the coil 23 from sliding or displacing in the coil framework 2.

[0043] Further, the outer side of the coil 23 is covered with a sealing protective layer 25. In this embodiment, the sealing protective layer 25 is an insulating tape, which seals and protects the coil 23, enhances the insulation and voltage resistance, and seals the coil 23 with the sealing protective layer 25 to isolate it from the outside air, thereby reducing the influence of a humid environment on the coil 23.

[0044] The second silicon steel sheets 3 are provided in plurality and correspond to the positions of the plurality of first silicon steel sheets 1. In operation, when the coil 23 is powered, the first silicon steel sheet 1 and the second silicon steel sheet 3 are attracted, and when the coil 23 is powered off, the first silicon steel sheet 1 and the second silicon steel sheet 3 are released.

[0045] As a preferred embodiment, a plurality of heat dissipation holes 5 are formed on the first silicon steel sheet 1 and the second silicon steel sheet 3 to improve the heat dissipation performance and reduce the influence of the heat generated by the coil 23 in operation on the device.

[0046] As shown in the accompanying drawings, Figure 1 and 6 The multi-stage buffer assembly 4 is arranged on the contact surface of the first silicon steel sheet 1 and the second silicon steel sheet 3, and the multi-stage buffer assembly 4 is used to buffer the vibration generated when the first silicon steel sheet 1 and the second silicon steel sheet 3 are attracted.

[0047] Specifically, the multi-stage buffer assembly 4 includes a compensation gasket 41, an elastic deformation layer 42, and a rigid contact ring 43.

[0048] The compensation gasket 41 is embedded on the attraction surface of the first silicon steel sheet 1. In this embodiment, the compensation gasket 41 is made of permalloy, which has good magnetism and flexibility and can compensate for the unevenness of the attraction surface. In terms of connection, a groove matching the shape of the compensation gasket 41 can be formed on the first silicon steel sheet 1 to tightly embed the compensation gasket 41. Since the compensation gasket 41 has a certain flexibility, it can better adapt to the slight deformation during embedding, thereby achieving tight connection.

[0049] The elastic deformation layer 42 is made of a copper mesh and aramid fiber laminated together. The elastic deformation layer 42 is fixed on the compensation gasket 41, and there is a gap between the elastic deformation layer 42 and the compensation gasket 41. This structure allows the elastic deformation layer 42 to elastically deform when subjected to pressure, thereby absorbing the vibration energy when the first silicon steel sheet 1 and the second silicon steel sheet 3 are attracted. The connection between the elastic deformation layer 42 and the compensation gasket 41 can be achieved by using high-temperature-resistant and vibration-resistant glue.

[0050] The rigid contact ring 43 is fixed on the elastic deformation layer 42, and in the embodiment, the rigid contact ring 43 is made of tungsten carbide-based alloy material, which has high hardness and wear resistance; when the first silicon steel sheet 1 and the second silicon steel sheet 3 are attracted, the rigid contact ring 43 is in contact with the second silicon steel sheet 3, thereby ensuring the stability of the attraction, wherein the rigid contact ring 43 and the elastic deformation layer 42 can be connected by inlaying or welding.

[0051] In operation, when the coil 23 is powered, the first silicon steel sheet 1 and the second silicon steel sheet 3 are attracted under the action of electromagnetic force, the second silicon steel sheet 3 is impacted by the electromagnetic force on the rigid contact ring 43, the rigid contact ring 43 bears a large contact stress, transmits the force to the elastic deformation layer 42, the elastic deformation layer 42 is elastically deformed to absorb most of the impact energy, and then transmits the remaining force to the compensation gasket 41, and the compensation gasket 41 further buffers the force and transmits the force to the first silicon steel sheet 1.

[0052] By arranging the multistage buffering assembly 4 between the first silicon steel sheet 1 and the second silicon steel sheet 3, a stepped damping structure of the rigid contact ring 43, the elastic deformation layer 42 and the compensation gasket 41 is formed, the impact force when the first silicon steel sheet 1 and the second silicon steel sheet 3 are attracted is absorbed layer by layer, which not only prevents damage to the coil 23 caused by direct contact, but also avoids the loosening or displacement of the coil 23 caused by vibration, thereby ensuring the stability of the coil 23 and prolonging the service life.

[0053] The utility model discloses still disclose a kind of application examples of coil 23 protection device: a brake, include above-mentioned coil 23 protection device, base 6, armature plate 7, end plate 8 and clapper 9.

[0054] A plurality of angle column screws 61 are evenly arranged on the base 6 along the circumferential direction thereof, and the end plate 8 is connected and fixed to the top end of the plurality of angle column screws 61. The armature plate 7 is slidingly arranged on the angle column screws 61 between the base 6 of the brake and the end plate 8, and the coil 23 protection device is arranged between the armature plate 7 and the end plate 8. Specifically, the first silicon steel sheet 1 of the coil 23 protection device is fixed to the end plate 8, and the second silicon steel sheet 3 of the coil 23 protection device is fixed to the armature plate 7.

[0055] The clapper 9 is located between the armature plate 7 and the base 6 of the brake, and a return spring 611 is arranged on each angle column screw 61. The return spring 611 is used to drive the armature plate 7 away from the end plate 8.

[0056] When the coil 23 protection device is powered, the armature plate 7 moves towards the end plate 8 and is attracted to the end plate 8. When the coil 23 protection device is powered off, the armature plate 7 moves away from the end plate 8 under the drive of the return spring 611 and drives the clapper 9 to rub against the base 6 to achieve a braking effect.

[0057] The base 6 is provided with a release movable pin 62 on both sides, the inner end of the release movable pin 62 is matched with the bottom surface of the armature plate 7, the outer end of the release movable pin 62 is fixed through a release handle 63, when manual release of the brake is needed, the release handle 63 can be operated to make the release movable pin 62 push the armature plate 7, so that the brake state is released.

[0058] The utility model discloses still the application example of above -mentioned kind of brake: a motor contains the brake.

[0059] The above is only the specific application example of the utility model, and does not constitute any limitation on the protection scope of the utility model; all technical solutions formed by using equivalent transformation or equivalent replacement fall within the protection scope of the utility model.

Claims

1. A coil protection device, characterized by: Comprise A first silicon steel sheet (1) is provided with a plurality of first silicon steel sheets (1) uniformly distributed in the circumferential direction, and two mutually parallel clamping grooves (11) are opened on each silicon steel sheet. A coil former (2) is provided with two coil formers (2) distributed in a ring shape, and the two coil formers (2) are respectively embedded in the two clamping grooves (11) on the first silicon steel sheet (1); the two sides of each coil former (2) are respectively provided with a first stop edge (21) and a second stop edge (22), and a wire slot is formed between the first stop edge (21) and the second stop edge (22), the wire slot is used for winding a coil (23), the coil (23) does not exceed the wire slot, and the outer side of the coil (23) is covered with a sealing protective layer (25). A second silicon steel sheet (3) is provided with a plurality of second silicon steel sheets (3) corresponding to the positions of the plurality of first silicon steel sheets (1); when the coil (23) is energized, the first silicon steel sheet (1) and the second silicon steel sheet (3) are attracted, and when the coil (23) is de-energized, the first silicon steel sheet (1) and the second silicon steel sheet (3) are released. A multi-stage buffer assembly (4) is arranged on the contact surface of the first silicon steel sheet (1) and the second silicon steel sheet (3), and the multi-stage buffer assembly (4) is used for buffering the vibration generated when the first silicon steel sheet (1) and the second silicon steel sheet are attracted.

2. A coil protection device according to claim 1, characterized in that: The multi-stage buffer assembly (4) comprises: A compensation gasket (41) is embedded on the attraction surface of the first silicon steel sheet (1); An elastic deformation layer (42) is made of a copper mesh and aramid fiber laminated, the elastic deformation layer (42) is fixed on the compensation gasket (41), and there is a gap between the elastic deformation layer (42) and the compensation gasket (41); A rigid contact ring (43) is fixed on the elastic deformation layer (42), and when the first silicon steel sheet (1) and the second silicon steel sheet (3) are attracted, the rigid contact ring (43) is in contact with the second silicon steel sheet (3).

3. A coil protection device according to claim 2, characterised in that: The rigid contact ring (43) is made of tungsten carbide-based alloy material, and the compensation gasket (41) is made of permalloy material.

4. A coil protection device according to claim 1, characterized in that: The coil former (2) is made of engineering plastic, and the anti-skid pattern (24) is integrally formed at the bottom of the wire slot of the coil former (2).

5. A coil protection device according to claim 1, characterized in that: A plurality of heat dissipation holes (5) are opened on the first silicon steel sheet (1) and the second silicon steel sheet (3).

6. A coil (23) protection device according to claim 1, characterized in that: The first stop edge (21) and the second stop edge (22) are integrally formed on the coil former (2).

7. A brake characterized by: The coil protection device, the base (6), the armature plate (7), the end plate (8) and the laminated sheet (9) of any one of claims 1-6 are comprised. The base (6) is uniformly provided with a plurality of angle column screws (61) along its circumferential direction, the end plate (8) is fixedly connected to the top of the angle column screws (61), the armature plate (7) is slidably arranged on the angle column screws (61) between the brake base (6) and the end plate (8), and the coil (23) protection device is arranged between the armature plate (7) and the end plate (8); The amortisseur (9) is located between the armature plate (7) and the brake base (6), and each angle column screw (61) is provided with a reset spring (611) for driving the armature plate (7) to move away from the end plate (8).

8. A brake according to claim 7, wherein: The first silicon steel sheet (1) of the coil protection device is fixed on the end plate (8), and the second silicon steel sheet (3) of the coil (23) protection device is fixed on the armature plate (7); When the coil (23) protection device is powered on, the armature plate (7) moves towards the end plate (8) and is attracted to the end plate (8); when the coil (23) protection device is powered off, the armature plate (7) moves away from the end plate (8) under the driving of the reset spring (611) and drives the amortisseur (9) to rub against the base (6).

9. A brake according to claim 7, wherein: Both sides of the base (6) are provided with release movable pins (62), the inner end of the release movable pin (62) is matched with the bottom surface of the armature plate (7), and the outer end of the release movable pin (62) is fixed through a release handle (63).

10. An electric machine characterized by: The brake comprises the amortisseur according to any one of claims 7-9.

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