Tapered wedge type electromagnetic brake

Abstract

The utility model relates to the technical field of electromagnetic brakes, in particular to an inclined wedge type electromagnetic brake which comprises a magnet yoke and a movable plate, an installation groove hole is formed in the middle of the magnet yoke, and a conical head structure used for being inserted into the installation groove hole is arranged at one end of the movable plate. An inclined wedge assembly is arranged between the installation groove hole and the conical head structure, and the movable plate moves in the axial direction to extrude the inclined wedge assembly to abut against the hole wall of the installation groove hole in the radial direction. According to the utility model, the braking torque is greatly improved, and the braking time consumed by the brake is shortened.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic brake technology, and more specifically, to a wedge-type electromagnetic brake. Background Technology

[0002] The working principle of a permanent magnet brake is mainly based on the interaction between the magnetic field generated by the permanent magnet and the magnetic field generated by the electromagnetic coil to achieve braking and release functions. When it is necessary to release the brake, a direct current is applied to the stator enameled wire. At this time, the magnetic field formed by the enameled wire and the magnetic field of the permanent magnet have opposite polarities. According to the principle of superposition of magnetic fields, the two magnetic fields cancel each other out, and the attraction of the permanent magnet to the armature disappears. Under the action of its own elasticity or other reset devices, the armature separates from the friction surface of the stator, the rotor is no longer hindered by frictional torque, the equipment shaft can rotate freely, and the braking state is released.

[0003] In traditional permanent magnets, the moving plate or armature, when attracted, comes into close contact with the friction surface of the stator, generating a frictional torque. This torque impedes the rotation of the rotor, thus stopping or keeping the shaft of the equipment connected to the rotor stationary, achieving a braking function. This method primarily relies on the contact between the moving plate and the end face of the yoke for braking, and its braking torque is relatively small. Utility Model Content

[0004] The purpose of this invention is to provide a wedge-type electromagnetic brake to further improve braking torque and shorten braking time.

[0005] This utility model is achieved through the following technical solution: a wedge-type electromagnetic brake, including a magnetic yoke and a moving plate, wherein the magnetic yoke has a mounting slot in the middle, and one end of the moving plate is provided with a conical head structure for insertion into the mounting slot; a wedge assembly is provided between the mounting slot and the conical head structure, and the wedge assembly is pressed radially against the wall of the mounting slot by the axial movement of the moving plate.

[0006] Furthermore, the wedge assembly includes a first wedge-shaped member, which is disposed at the bottom of the mounting slot, and a movable gap is left between the first wedge-shaped member and the wall of the mounting slot.

[0007] Furthermore, the wedge assembly also includes a second wedge, which is disposed above the first wedge, and the lower end of the second wedge is in inclined contact with the upper end of the first wedge; the second wedge is in close contact with the wall of the mounting slot.

[0008] Furthermore, the first wedge and the second wedge are joined together in a ring arrangement around the mounting slot.

[0009] Furthermore, an auxiliary block is provided between the second wedge-shaped member and the conical head structure.

[0010] Furthermore, a countersunk hole is provided on the side end face of the moving plate near the magnetic yoke, and the countersunk hole corresponds to and fits the top end of the second wedge.

[0011] Furthermore, a permanent magnet and a mounting top ring are provided between the moving plate and the magnetic yoke. The mounting top ring is installed inside the magnetic yoke, and the permanent magnet is located in the gap between the mounting top ring and the magnetic yoke.

[0012] Furthermore, it also includes an end cap and an elastic element, the elastic element being installed between the end cap and the moving plate.

[0013] The technical solution of this utility model has at least the following advantages and beneficial effects: By setting multiple wedge-shaped parts between the magnetic yoke and the moving plate, the conical head structure of the moving plate will squeeze the wedge-shaped parts tightly during the downward pressing process of the moving plate, which increases the braking contact area and braking torque, and the brake has a better braking effect and shortens the braking time. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal structure of the inclined wedge electromagnetic brake in this utility model.

[0015] Figure 2 This is a top view of one end face of the magnetic yoke in this utility model.

[0016] Reference numerals: 1-Magnetic yoke, 11-Mounting slot, 111-Moving gap, 2-Moving plate, 21-Conical head structure, 22-Counterhole, 3-Wedge assembly, 31-First wedge, 32-Second wedge, 33-Auxiliary block, 4-End cap, 5-Elastic element, 6-Mounting top ring, 7-Permanent magnet. Detailed Implementation

[0017] The following description, in conjunction with specific embodiments, provides further details. Figures 1-2 As shown, this embodiment is a wedge-type electromagnetic brake, including a magnetic yoke 1 and a moving plate 2. The magnetic yoke 1 has a mounting slot 11 in the middle, and one end of the moving plate 2 has a conical head structure 21 for insertion into the mounting slot 11. A wedge assembly 3 is provided between the mounting slot 11 and the conical head structure 21. The axial movement of the moving plate 2 compresses the wedge assembly 3 to press against the wall of the mounting slot 11 radially. Specifically, when the brake attracts the moving plate 2 to move closer, the conical head structure 21 at the front end of the moving plate 2 moves further axially by a certain distance. The conical head structure 21 will compress the wedge assembly 3, and the wedge assembly 3 will apply radial pressure to the mounting slot 11. At the same time, the end face of the moving plate 2 will also make frictional contact with the end face of the magnetic yoke 1, thereby greatly improving the braking torque during braking.

[0018] like Figure 1 and Figure 2 As shown, in some embodiments, the wedge assembly 3 includes a first wedge 31, which is disposed at the bottom of the mounting slot 11, and a movable gap 111 is left between the first wedge 31 and the wall of the mounting slot 11; the wedge assembly 3 also includes a second wedge 32, which is disposed above the first wedge 31, and the lower end of the second wedge 32 is in inclined contact with the upper end of the first wedge 31; the second wedge 32 is in close contact with the wall of the mounting slot 11; specifically, the wedge assembly Component 3 is assembled from one or more wedge-shaped components, which causes the first wedge 31 to move radially under the downward pressure generated by the downward movement of the moving plate 2. This allows the second wedge 32 to not only fit tightly against the inner wall of the mounting slot 11, but also for the first wedge 31 to push the second wedge 32 upward, so that the second wedge 32 abuts against the surface of the moving plate 2, increasing the contact friction and thus improving the braking torque. It also increases the braking contact area between the conical head structure 21 and the first wedge 31 and the second wedge 32.

[0019] like Figure 2 As shown, in some embodiments, the first wedge 31 and the second wedge 32 are spliced ​​around the mounting slot 11 to form a ring arrangement. Specifically, multiple first wedges 31 and second wedges 32 have good independent movement or mobility, and the conical head structure 21 of the moving plate 2 acts on the outer edge of this ring center, and the components can move radially outward. In addition, the first wedge 31 and the second wedge 32 can also adopt a cylindrical structure.

[0020] like Figure 1 As shown, in order to further increase the braking contact area of ​​the moving plate 2, an auxiliary block 33 is also provided between the second wedge 32 and the conical head structure 21. Specifically, the auxiliary block 33 and the first wedge 31 are in direct contact with the moving plate 2. When the conical head structure 21 presses against the auxiliary block 33, the force is transmitted radially to the wall of the mounting slot 11, increasing the friction between the second wedge 32 and the inner wall of the mounting slot 11.

[0021] like Figure 1 As shown, when the moving plate 2 is close to the magnetic yoke 1, a countersunk hole 22 is provided on one end face. The countersunk hole 22 is adapted to the top of the second wedge 32. Specifically, when the second wedge 32 is lifted and inserted into the countersunk hole 22, it has a better braking friction effect and the second wedge 32 can also apply a part of the radial force to the moving plate 2.

[0022] In this embodiment, a permanent magnet 7 and a mounting top ring 6 are provided between the moving plate 2 and the magnetic yoke 1. The mounting top ring 6 is installed inside the magnetic yoke 1, and the permanent magnet 7 is located in the gap between the mounting top ring 6 and the magnetic yoke 1. When the magnetic yoke 1 is de-energized, the moving plate 2 is attracted to the braking position by the permanent magnet 7.

[0023] like Figure 1 As shown, this embodiment also includes an end cap 4 and an elastic element 5, which is installed between the end cap 4 and the moving plate 2. Specifically, when the yoke 1 is energized, the magnetic field of the yoke 1 cancels out the magnetic field of the permanent magnet 7, thereby pulling the moving plate 2 back to release the braking state.

[0024] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wedge-type electromagnetic brake, comprising a magnetic yoke (1) and a moving plate (2), characterized in that: The magnetic yoke (1) has a mounting slot (11) in the middle, and one end of the moving plate (2) has a conical head structure (21) for inserting into the mounting slot (11); A wedge assembly (3) is provided between the mounting slot (11) and the conical head structure (21). The wedge assembly (3) is pressed against the wall of the mounting slot (11) radially by the axial movement of the moving plate (2).

2. The wedge-type electromagnetic brake according to claim 1, characterized in that: The wedge assembly (3) includes a first wedge (31), which is disposed at the bottom of the mounting slot (11), and a movable gap (111) is left between the first wedge (31) and the wall of the mounting slot (11).

3. The wedge-type electromagnetic brake according to claim 2, characterized in that: The wedge assembly (3) further includes a second wedge (32), which is disposed above the first wedge (31), and the lower end of the second wedge (32) is in inclined contact with the upper end of the first wedge (31). The second wedge (32) is in close contact with the wall of the mounting slot (11).

4. The wedge-type electromagnetic brake according to claim 3, characterized in that: The first wedge (31) and the second wedge (32) are spliced ​​together in a ring around the mounting slot (11).

5. The wedge-type electromagnetic brake according to claim 4, characterized in that: An auxiliary block (33) is also provided between the second wedge (32) and the conical head structure (21).

6. The wedge-type electromagnetic brake according to any one of claims 3-5, characterized in that: The movable plate (2) has a countersunk hole (22) on one end face near the magnetic yoke (1), and the countersunk hole (22) is adapted to the top end of the second wedge (32).

7. The wedge-type electromagnetic brake according to claim 1, characterized in that: A permanent magnet (7) and a mounting top ring (6) are provided between the moving plate (2) and the magnetic yoke (1). The mounting top ring (6) is installed inside the magnetic yoke (1), and the permanent magnet (7) is located in the gap between the mounting top ring (6) and the magnetic yoke (1).

8. The wedge-type electromagnetic brake according to claim 1, characterized in that: It also includes an end cap (4) and an elastic element (5), the elastic element (5) being installed between the end cap (4) and the moving plate (2).

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