Electromagnetic brake structure

Abstract

The utility model discloses an electromagnetic brake structure which comprises a middle shaft and a stator iron core, the middle shaft penetrates through and is installed in the stator iron core, and the middle shaft is rotationally connected with the stator iron core; the middle shaft is sleeved with a supporting piece, a spring and an armature, the supporting piece is connected with the middle shaft, and the armature is slidably connected with the middle shaft; one end of the spring is connected with the supporting piece, and the other end of the spring is connected with the armature; the stator iron core is further provided with an electromagnetic induction device, the position of the electromagnetic induction device is matched with the armature, the electromagnetic induction device is matched with the stator iron core in a power-on state to form a stator, and the stator is used for adsorbing the armature. And the braking precision and the cost of the brake structure are optimized.

Description

Technical Field

[0001] The present application relates to an electromagnetic brake structure, belonging to the technical field of brakes. Background Art

[0002] The armature of the energized braking electromagnetic brake in the prior art is indirectly connected to the shaft to be braked, and the indirectly connected parts are generally rotating parts (for example: flange, pulley, etc.). Its main feature is that the armature and these rotating parts are connected through leaf springs. The shape of the leaf spring is generally fan-shaped, ring-shaped or other shapes. The functional characteristics of the leaf spring are to produce spring force on the armature axially and to transmit torque circumferentially. The leaf spring is connected to the armature on one side by riveting or screwing, and is connected to the rotating parts on the other side. The production process of this connection structure is relatively complicated, and it is necessary to rivet or tighten the screws, and usually it is necessary to adjust the brake air gap through an adjustment ring. In addition, because the other side of the leaf spring needs to be connected to the rotating parts, the number of parts increases, which further leads to an increase in cost. Therefore, a new electromagnetic brake structure has become a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0003] According to one aspect of the present application, a new electromagnetic brake structure is provided.

[0004] The present application provides an electromagnetic brake structure, comprising a central shaft and a stator core: the central shaft passes through and is installed inside the stator core, and the central shaft is rotatably connected to the stator core;

[0005] The central shaft is provided with a support, a spring and an armature, the support is provided outside the central shaft, and the armature is slidably connected to the central shaft; one end of the spring is connected to the support, and the other end of the spring is in contact with the armature;

[0006] An electromagnetic induction device is also installed on the stator core. The position of the electromagnetic induction device is adapted to the armature. The electromagnetic induction device cooperates with the stator core to form a stator when powered on. The stator is used to adsorb the armature.

[0007] Optionally, the central axis includes a connecting axis, a supporting axis and a stabilizing axis;

[0008] The connecting shaft, the supporting shaft and the stabilizing shaft are connected in sequence;

[0009] The support member is sleeved on the outside of the support shaft;

[0010] The armature is sleeved on the outer side of the support shaft, and the support shaft is slidably connected to the armature;

[0011] The stabilizing shaft is used to define the position of the armature and is also used to support and transmit torque.

[0012] Optionally, a bearing is sleeved on the connecting shaft, and the bearing is used to enable the connecting shaft and the stator core to be matched and connected.

[0013] Optionally, the electromagnetic induction device includes a coil and an external DC power supply, the coil is arranged inside the stator core, and the coil is abutted against or provided with a gap with the armature.

[0014] Optionally, when there is a gap between the coil and the armature, a gap setting is adopted, and a gap portion is provided.

[0015] Optionally, a friction plate may be further provided in the gap portion, and the friction plate is provided on a side close to the coil.

[0016] Optionally, the spring is a helical compression spring.

[0017] The beneficial effects that can be produced by the present application include: the present application provides a sequential or reverse transmission of torque between "armature-shaft" or "armature-transition part-shaft", the stator core cooperates with the coil to produce a stator, and when the coil is energized with direct current, the stator forms a braking effect on the armature. One end of the helical compression spring provided in the present application abuts against the armature, and the other end is connected to the support member on the central axis, so that the compression spring is always in a compressed state after the brake is installed, and when the armature rotates, the compression spring rotates with the armature, so that the axial space is reasonably utilized, the manufacturing cost is reduced, and the entire assembly is simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of electromagnetic brake;

[0019] Figure 2 It is a schematic diagram of the friction plate of the electromagnetic brake structure;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of part a;

[0021] Figure 4 for Figure 2 Schematic diagram of the structure of part b;

[0022] List of components and figure marks: 1. Central axis; 11. Connecting axis; 12. Support axis; 13. Stabilizing axis; 2. Stator core; 3. Bearing; 4. Support member; 5. Spring; 6. Armature; 7. Electromagnetic induction device; 71. Coil; 72. DC power supply; 8. Friction plate; 9. Outer magnetic pole surface; 10. Inner magnetic pole surface. DETAILED DESCRIPTION

[0023] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0024] Please refer to Figures 1 to 4 As shown, the present application provides an electromagnetic brake structure, comprising a central axis 1 and a stator core 2: the central axis 1 passes through and is installed inside the stator core 2, and the central axis 1 is rotatably connected to the stator core 2;

[0025] The central axis 1 is sleeved with a support member 4, a spring 5 and an armature 6, wherein the support member 4 is sleeved on the outside of the central axis 1, and the armature 6 is slidably connected to the central axis 1; one end of the spring 5 is connected to the support member 4, and the other end of the spring 5 is in contact with the armature 6;

[0026] The spring 5 is a helical compression spring.

[0027] The central axis 1 includes a connecting axis 11, a supporting axis 12 and a stabilizing axis 13;

[0028] The connecting shaft 11, the supporting shaft 12 and the stabilizing shaft 13 are connected in sequence, and the connecting shaft 11, the supporting shaft 12 and the stabilizing shaft 13 can also be integrally formed and connected during manufacturing.

[0029] The armature 6 is sleeved on the outer side of the support shaft 12, and the support shaft 12 is slidably connected to the armature 6;

[0030] The stabilizing shaft 13 is used to define the position of the armature 6 and is also used to support and transmit torque.

[0031] The connecting shaft 11 is sleeved with a bearing 3 , the inner ring of the bearing 3 is cooperatively connected to the connecting shaft 11 , and the outer ring of the bearing 3 is cooperatively connected to the stator core 2 .

[0032] It should be noted that the support shaft 12 adopts a flat key structure, an involute spline structure, a rectangular spline structure, or a structure in which the connecting cross-section of the central axis 1 and the armature 6 is a combination of n circular arcs (n is a natural number) and N straight lines (N is a natural number greater than or equal to 2), and a limiting part, namely, the support member 4, is provided on the support shaft 12, so that the support member 4 (including a sleeve, an elastic coil and a shoulder) is stably arranged on the support shaft 12 to ensure the elastic effect of the spring 5 on the armature 6.

[0033] The support member 4 is arranged on the outside of the support shaft 12. In the present application, the support member 4 can be set as a sleeve, an elastic retaining ring and a shoulder. When the support member 4 is a sleeve, it is sleeved on the outside of the support shaft 12, and the sleeve and the support shaft 12 can be clearance fit, interference fit or transition fit; when the support member 4 is an elastic retaining ring, it is clamped with the support shaft 12, and when the support member 4 is a shoulder, it is directly arranged on the outside of the support member 4.

[0034] The stator core 2 is also provided with an electromagnetic induction device 7 , the position of which is adapted to the armature 6 . The electromagnetic induction device 7 cooperates with the stator core 2 to form a stator when powered on, and the stator is used to absorb the armature 6 .

[0035] Please continue to refer to Figures 1 to 4 As shown, when there is a gap between the coil 71 and the armature 6, a gap setting is adopted, and a gap portion is provided;

[0036] When the external DC power supply 72 is powered on, the coil 71 and the stator core 2 form a stator, and the stator produces an adsorption effect on the armature 6, so that the armature 6 is close to the coil 71;

[0037] When the external DC power supply 72 is not energized, the coil 71 and the armature 6 are spaced apart and have a gap portion.

[0038] The gap portion may further be provided with a friction plate 8 , and the friction plate 8 is provided on a side close to the coil 71 .

[0039] It should be noted that the stator core 2 gathers the magnetic lines of force generated by the coil 71 after power is supplied to the inside of the stator core 2 to form a stator, so that the stator flows through the inner magnetic pole surface 10 and the outer magnetic pole surface 9. The outer magnetic pole surface 9 is arranged on the outside of the cylindrical surface formed by the average middle diameter of the coil 71 and close to one end of the armature 6. The inner magnetic pole surface 10 is arranged on the inner side of the outer magnetic pole surface 9, so that the outer magnetic pole surface 9 and the inner magnetic pole surface 10 have an adsorption effect on the armature 6.

[0040] It is worth noting that when the coil 71 is connected to the external DC power supply 72, the stator core 2 generates an attraction on the armature 6, and the electromagnetic attraction overcomes the elastic force to make the armature move toward the stator core 2 until the armature 6 fits against the friction surface on the stator core 2. At this time, positive pressure is generated on the friction surface. When the armature 6 has a tendency to rotate and slide around its rotation axis or rotates and slides around its rotation axis, the friction surface generates a friction torque to prevent the armature from sliding around its rotation axis or hinder the armature 6 from sliding around its rotation axis, thereby generating a braking torque. When the direct current to the coil 71 is suddenly disconnected, the attraction of the stator core 2 on the armature 6 disappears, and under the action of the spring 5, the armature 6 is reset, the armature 6 does not contact the friction surface on the stator core 2, the braking effect is released, and the armature 6 can rotate freely around its rotation axis. The friction surface in the present application is the outer magnetic pole surface 9, or the inner magnetic pole surface 10 and the outer magnetic pole surface 9, or the friction surface of the friction plate 8 close to one end of the armature 6.

[0041] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. An electromagnetic brake structure, characterized in that: It includes a central shaft (1) and a stator core (2): The central shaft (1) passes through and is installed inside the stator core (2), and the central shaft (1) is rotatably connected to the stator core (2); The central axis (1) is provided with a support member (4), a spring (5) and an armature (6); the support member (4) is provided on the outside of the central axis (1), and the armature (6) is slidably connected to the central axis (1); one end of the spring (5) is connected to the support member (4), and the other end of the spring (5) is in contact with the armature (6); An electromagnetic induction device (7) is also installed on the stator core (2). When powered on, the electromagnetic induction device (7) cooperates with the stator core (2) to form a stator, and the stator is used to absorb the armature (6).

2. An electromagnetic brake structure according to claim 1, characterized in that: The central axis (1) comprises a connecting axis (11), a supporting axis (12) and a stabilizing axis (13); The connecting shaft (11), the supporting shaft (12) and the stabilizing shaft (13) are connected in sequence; The support member (4) is sleeved on the outside of the support shaft (12); The armature (6) is sleeved on the outer side of the support shaft (12), and the support shaft (12) is slidably connected to the armature (6); The stabilizing shaft (13) is used to define the position of the armature (6) and is also used to support and transmit torque.

3. An electromagnetic brake structure according to claim 2, characterized in that: A bearing (3) is sleeved on the connecting shaft (11), and the bearing (3) is used to enable the connecting shaft (11) and the stator core (2) to be matched and connected.

4. The electromagnetic brake structure according to claim 3, characterized in that: The electromagnetic induction device (7) comprises a coil (71) and an external DC power supply (72); the coil (71) is arranged inside the stator core (2); and the coil (71) and the armature (6) are in contact with each other or are spaced apart from each other.

5. An electromagnetic brake structure according to claim 4, characterized in that: When there is a gap between the coil (71) and the armature (6), a gap setting is adopted, and a gap portion is provided.

6. The electromagnetic brake structure according to claim 5, characterized in that: The gap portion may also be provided with a friction plate (8), and the friction plate (8) is provided on a side close to the coil (71).

7. The electromagnetic brake structure according to claim 1, characterized in that: The spring (5) is a helical compression spring.

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