Permanent magnet brake convenient to assemble

Abstract

The permanent magnet brake convenient to assemble comprises an iron core, a groove disc, a coil, a permanent magnet, an armature, a leaf spring and a flange, and the iron core is composed of a first annular iron core plate, a second annular iron core plate and an iron core barrel which are connected with one another and integrally formed. The first annular iron core plate and the second annular iron core plate are connected with the two ends of the iron core barrel respectively and form an annular iron core coil groove in the periphery of the iron core barrel, the coil is arranged in the iron core coil groove, the groove disc is cylindrical and located at the position, close to an outer side groove opening, in the iron core coil groove, the first end of the groove disc is connected with the second annular iron core plate, and the second end of the groove disc is connected with the iron core barrel. The permanent magnet is installed between the circumferential inner wall of the second end of the groove disc and the circumferential outer wall of the first annular iron core plate. According to the utility model, the coil can be directly wound in the coil groove of the iron core and is directly fixed, the coil does not need to be prefabricated for reinstallation, and epoxy materials are not needed for fixation, so that the assembly is convenient, the manufacturing procedures are reduced, the production efficiency is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a permanent magnet brake, especially a permanent magnet brake convenient to assemble. BACKGROUND

[0002] As an important branch of the electromagnetic braking field, the permanent magnet brake is widely used in industrial automation, robots and other scenes due to its advantages of power-off self-locking and no excitation power consumption.

[0003] The basic structure of the permanent magnet brake is generally composed of a stator assembly and a rotating shaft assembly, as shown in the drawings. Figure 1 In the structure of the conventional permanent magnet brake, the stator assembly includes a conventional core 14, a conventional slot disc 12, a coil 13 and a permanent magnet 11, and the rotating shaft assembly includes an armature 21, a leaf spring 22 and a flange 23. The radial section of the conventional core 14 and the conventional slot disc 12 is in the shape of "L" and is in butt joint with each other. The coil 13 is placed in the inner cavity formed by the conventional core 14 and the conventional slot disc 12. The permanent magnet 11 is installed between the conventional core 14 and the conventional slot disc 12 and is close to the armature 21. The armature 21 is connected to the flange 23 through the leaf spring 22. In use, the flange 23 is sleeved on the rotating shaft 3. When the coil 13 is connected to the power supply, the electromagnetic field generated by the coil 13 and the permanent magnet field generated by the permanent magnet 11 cancel each other out, so that the armature 21 is separated from the corresponding end surfaces of the conventional core 14 and the conventional slot disc 12 under the elastic force of the leaf spring 22. The armature 21, the flange 23 and the rotating shaft 3 can rotate freely, and the brake is in the unbraked state at this time. When the coil 13 is disconnected from the power supply, the magnetic force of the permanent magnet 11 attracts the armature 21 to move towards the conventional core 14 and the conventional slot disc 12. Finally, the armature 21 is in contact with the corresponding end surfaces of the conventional core 14 and the conventional slot disc 12 to generate a friction force. The friction force makes the armature 21, the flange 23 and the rotating shaft 3 unable to rotate, and the brake is in the braked state at this time.

[0004] The conventional permanent magnet brake has the following defects: Because the radial section of the conventional core 14 and the conventional slot disc 12 is in the shape of "L", the coil 13 cannot be directly wound on the conventional core 14 when the coil 13 is assembled. Instead, the coil 13 needs to be wound first, then installed in the "L"-shaped slot of the conventional core 14, and then the conventional core 14 and the conventional slot disc 12 are connected together and filled with epoxy material (not shown in the figure) for curing and fixing. In this way, the coil 13 can be reliably positioned. This structure requires a complex assembly process, low efficiency and high cost, which is not conducive to simplifying the process, improving efficiency and reducing cost. In addition, the connection gap between the conventional core 14 and the conventional slot disc 12 is close to the inner side, so the connection gap must be close to the rotating shaft 3. The rotating shaft 3 is a metal part and is a magnetic conductive material, which will inevitably increase the magnetic leakage at the connection gap. Figure 1The magnetic path part of the rotating shaft 3 is passed through, so that the permanent magnetic force of the permanent magnetic loop to the armature 21 is reduced, and the braking effect is reduced. Content of the utility model

[0005] The utility model discloses a kind of permanent magnet brakes of easy assembly, which is to solve the above problems.

[0006] The utility model discloses the above-mentioned purposes are realized by the following technical solutions:

[0007] A kind of permanent magnet brake of easy assembly, including core, slot disc, coil, permanent magnet, armature, leaf spring and flange, the core and the slot disc are interconnected and the coil is placed between the core and the slot disc, the permanent magnet is installed between the core and the slot disc and close to the armature, the armature is connected with the flange by the leaf spring, the core is formed by the first circular ring core plate, the second circular ring core plate and core cylinder that are interconnected, the first circular ring core plate and the second circular ring core plate are connected with the two ends of the core cylinder respectively and form annular core coil groove in the outer periphery of the core cylinder, the coil is placed in the core coil groove, the slot disc is cylindrical and is located in the core coil groove close to the position of outer slot mouth, the first end in the two ends of the slot disc is connected with the second circular ring core plate, the permanent magnet is installed between the circumferential inner wall of the second end in the two ends of the slot disc and the circumferential outer wall of the first circular ring core plate.

[0008] As preferred, to facilitate assembly and reliably connect slot disc and second circular bad core plate, the outer diameter of the first circular ring core plate is less than the outer diameter of the second circular ring core plate, and a positioning pin is arranged between the first end of the slot disc and the position close to the edge of the second circular ring core plate.

[0009] As preferred, to better meet application requirements, the first end of the slot disc and the surface close to the edge of the second circular ring core plate are filled with non-magnetic material or weak magnetic material, or the first end of the slot disc and the surface close to the edge of the second circular ring core plate have a connecting gap.

[0010] As preferred, to better position the permanent magnet to prevent it from falling out, the circumferential outer wall surface of the first circular ring core plate or the second end circumferential inner wall surface of the slot disc is provided with a positioning boss close to the armature, and the permanent magnet is placed on one side of the positioning boss.

[0011] The utility model has the advantages of:

[0012] The utility model discloses a ring core coil groove is arranged directly on the iron core, and the coil can be directly wound and fixed in the ring core coil groove, so the coil does not need to be prefabricated and installed, and the epoxy material is not needed for fixing, the utility model discloses convenient assembly, reduces the manufacturing procedure, improves the production efficiency, reduces the production cost, and the connecting position between the iron core and the groove disc is close to the outside of the iron core, and the distance from the rotating shaft is large enough, so the connecting gap between the iron core and the groove disc is not increased by the rotating shaft, compared with the traditional permanent magnet brake, the magnetic leakage is reduced, the permanent magnet circuit is not reduced to the permanent magnet force of armature, and the brake effect is less affected by the magnetic leakage. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the cross section structure schematic drawing of the traditional permanent magnet brake when using, and the permanent magnet circuit is shown in the drawing.

[0014] Figure 2 It is the cross section structure schematic drawing of the permanent magnet brake convenient to assemble.

[0015] Figure 3 It is the cross section structure schematic drawing of the permanent magnet brake convenient to assemble when using, and the permanent magnet circuit is shown in the drawing.

[0016] Figure 4 It is the front view structure schematic drawing of the iron of the permanent magnet brake convenient to assemble.

[0017] Figure 5 It is the enlarged view of "A" in Figure 2 Specific embodiment

[0018] The utility model will be further described in connection with the drawings:

[0019] As Figures 2-5 ​As shown in the utility model, the permanent magnet brake convenient to assemble comprises an iron core 17, a slot disc 15, a coil 13, a permanent magnet 11, an armature 21, a leaf spring 22 and a flange 23, the iron core 17 and the slot disc 15 are connected with each other and the coil 13 is arranged between the iron core 17 and the slot disc 15, the permanent magnet 11 is installed between the iron core 17 and the slot disc 15 and close to the armature 21, the armature 21 is connected with the flange 23 through the leaf spring 22, the iron core 17 is composed of a first circular ring-shaped iron core plate 172, a second circular ring-shaped iron core plate 173 and an iron core cylinder 171 which are connected with each other (preferably integrally formed, and can also be connected through screws), the first circular ring-shaped iron core plate 172 and the second circular ring-shaped iron core plate 173 are connected with two ends of the iron core cylinder 171 respectively and form an annular iron core coil groove 174 on the outer periphery of the iron core cylinder 171, the coil 13 is arranged in the iron core coil groove 174, the slot disc 15 is in the shape of a cylinder and is located in the iron core coil groove 174 close to the position of the outer side slot, a first end in the two ends of the slot disc 15 is connected with the second circular ring-shaped iron core plate 173, and the permanent magnet 11 is installed between the circumferential inner wall of the second end of the slot disc 15 and the circumferential outer wall of the first circular ring-shaped iron core plate 172.

[0020] As Figures 2-5 shown, the utility model discloses the following more optimized specific structure:

[0021] In order to be convenient for assembling and reliable connection slot disc 15 and second circular ring-shaped iron core plate 173, the outer diameter of first circular ring-shaped iron core plate 172 is less than the outer diameter of second circular ring-shaped iron core plate 173, and positioning pin 18 is arranged between the first end of slot disc 15 and the position close to the edge in second circular ring-shaped iron core plate 173.

[0022] In order to better satisfy application demand, non-magnetic material 16 (or weak magnetic material) is filled between the first end of slot disc 15 and the surface close to the edge in second circular ring-shaped iron core plate 173, or the first end of slot disc 15 and the surface close to the edge in second circular ring-shaped iron core plate 173 have connecting gap.

[0023] In order to better position permanent magnet 11 to prevent it from falling out, positioning boss 151 is arranged on the circumferential outer wall surface of first circular ring-shaped iron core plate 172 or the second end circumferential inner wall surface of slot disc 15 close to the position of armature 21, and permanent magnet 11 is arranged on one side of positioning boss 151.

[0024] As Figures 2-5As shown, when in use, the flange 23 is sleeved on the rotating shaft 3, when the coil 13 is connected to the power supply, the electromagnetic field generated by the coil 13 and the permanent magnetic field generated by the permanent magnet 11 offset each other, so that the armature 21 and the corresponding end surface of the traditional iron core 14 and the traditional slot disc 12 no longer have an attractive force, the armature 21 is separated from the corresponding end surface of the traditional iron core 14 and the traditional slot disc 12 under the elastic force of the leaf spring 22, the armature 21, the flange 23 and the rotating shaft 3 can rotate freely, at this time, the brake is in the unbraked state; when the coil 13 is disconnected from the power supply, the permanent magnetic force of the permanent magnet 11 attracts the armature 21 to move towards the traditional iron core 14 and the traditional slot disc 12, and finally makes the armature 21 contact with the corresponding end surface of the traditional iron core 14 and the traditional slot disc 12 to generate a friction force, the friction force makes the armature 21, the flange 23 and the rotating shaft 3 unable to rotate, at this time, the brake is in the braked state.

[0025] Description: The above-mentioned iron core 17 and slot disc 15 correspond to the traditional iron core 14 and the traditional slot disc 12 in the background art respectively, but because the structure is improved, different component names and mark numbers are adopted; Figure 1 The shape between the armature 21 and the flange 23 in the above-mentioned and the shape between the armature 21 and the flange 23 in the background art are different, Figure 2 , Figure 3 The shape between the armature 21 and the flange 23 in the above-mentioned and the shape between the armature 21 and the flange 23 in the background art are different,

[0026] The above-mentioned embodiments are only preferred embodiments of the present application, and are not a limitation on the technical scheme of the present application, as long as the technical scheme realized on the basis of the above-mentioned embodiments without creative labor is considered to fall within the protection scope of the patent of the present application.

Claims

1. A permanent magnet brake which is easy to assemble, comprising a core, a slot disc, a coil, a permanent magnet, an armature, a leaf spring and a flange, the core and the slot disc are connected to each other and the coil is placed between the core and the slot disc, the permanent magnet is installed between the core and the slot disc and close to the armature, the armature is connected with the flange through the leaf spring, characterized in that: The iron core is composed of a first circular annular iron core plate, a second circular annular iron core plate and an iron core simple body, the first circular annular iron core plate and the second circular annular iron core plate are connected with two ends of the iron core cylinder respectively and form an annular iron core coil groove at the outer periphery of the iron core simple body, the coil is placed in the iron core coil groove, the groove disc is in a cylindrical shape and is located at a position close to the outer side slot of the iron core coil groove, a first end of the groove disc is connected with the second circular annular iron core plate, and the permanent magnet is installed between the second end circumferential inner wall of the groove disc and the circumferential outer wall of the first circular annular iron core plate.

2. The permanently excited brake of claim 1, wherein: The outer diameter of the first circular annular iron core plate is smaller than the outer diameter of the second circular annular iron core plate, and a positioning pin is arranged between the first end of the groove disc and a position close to the edge of the second circular annular iron core plate.

3. The permanently excited brake of claim 2, wherein: The first end of the groove disc and the surface close to the edge of the second circular annular iron core plate are filled with a non-magnetic or weakly magnetic material, or the first end of the groove disc and the surface close to the edge of the second circular annular iron core plate have a connecting gap.

4. The permanently excited brake of any one of claims 1-3, wherein: A positioning boss is arranged on the circumferential outer wall surface of the first circular annular iron core plate or the second end circumferential inner wall surface of the groove disc close to the position of the armature, and the permanent magnet is placed on one side of the positioning boss.

Images