Energy-saving electromagnetic brake

Abstract

The invention is suitable for the technical field of brakes, and provides an energy-saving electromagnetic brake which comprises a stator and a flange plate, and a rotor capable of being matched with a target transmission shaft to synchronously rotate and an armature controlled by a coil and a spring are arranged in a gap between the stator and the flange plate; the spring can push the armature to be away from the stator so that the armature can abut against the friction plate for braking. The coil can attract the armature to approach the stator to separate the armature from the friction plate to cancel braking; a release plate used for limiting the armature is installed on the side, close to the flange plate, in the gap. The brake is provided with an external matching mechanism capable of controlling the release plate to limit or cancel limit of the armature, and the external matching mechanism adopts a push-pull type electromagnet. Therefore, the device can be kept in an open state without being electrified for a long time in an equipment operation working condition, so that unnecessary energy loss is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of brakes, and provides an energy-saving electromagnetic brake. BACKGROUND

[0002] In the field of parking brakes of railway vehicles, steel mill hot metal cars, heavy guide cars in freight yards and the like, the existing parking brakes in application are mostly hydraulic brakes.

[0003] Nowadays, in response to the development trend of green environmental protection and energy saving, the existing heavy rail vehicles are electrically transformed, battery power is used, and higher requirements are put forward for the energy consumption of each component.

[0004] In the existing application, the traditional electromagnetic brake is opened by power supply and is braked by power-off. That is, in the equipment running condition, long-time power supply is needed to keep the opened state, and unnecessary energy consumption cannot be ignored in the use process. SUMMARY

[0005] In view of the above defects, the purpose of the application is to provide an energy-saving electromagnetic brake, which aims to solve the problems in the background art. The energy-saving electromagnetic brake comprises a stator, a rotor arranged in the middle of the stator and capable of rotating synchronously with a target transmission shaft, and a friction plate arranged on the rotor. A flange plate is fixedly connected to the stator, and a gap is arranged between the stator and the flange plate. A movable armature is arranged in the gap. A coil and a spring are arranged on the stator and matched with the armature.

[0006] The spring can push the armature away from the stator so that the armature abuts against the friction plate to brake. The coil can attract the armature to the stator so that the armature is separated from the friction plate to cancel the braking.

[0007] Further, a release plate for limiting the armature is arranged on one side of the gap close to the flange plate. An external cooperation mechanism capable of controlling the release plate to limit or cancel the limitation of the armature is arranged on the brake.

[0008] Further, the external cooperation mechanism can adjust the position of the release plate in the gap and lock the position of the release plate.

[0009] Further, the release plate is sleeved on the flange plate and can rotate and move along the axial direction of the flange plate. A third fixing part is arranged on the release plate. The external cooperation mechanism comprises a push-pull mechanism arranged on the flange plate and a lever hingedly connected to the flange plate. One end of the lever is arranged on the output end of the push-pull mechanism, and the other end is matched with the third fixing part.

[0010] The flange plate is provided with a plurality of ball heads, and the release plate is provided with a plurality of groups of limiting holes matched with the ball heads; each group of limiting holes comprises a first limiting hole and a second limiting hole; the depth of the first limiting hole is deeper than that of the second limiting hole.

[0011] When the release plate rotates to two different positions, the ball head corresponds to the first limiting hole or the second limiting hole, respectively.

[0012] Further, the push-pull mechanism adopts a push-pull electromagnet.

[0013] Further, the output end of the push-pull mechanism is a telescopic rod, and a reset spring for resetting the telescopic rod is arranged between the telescopic rod and an inner shell of the push-pull mechanism in a matched mode.

[0014] When the coil in the push-pull mechanism is not powered, the reset spring pushes the telescopic rod to elongate, so that the ball head at the bottom of the flange plate corresponds to the deeper first limiting hole.

[0015] When the coil in the push-pull mechanism is powered, the coil in the push-pull mechanism pulls the telescopic rod to contract, so that the ball head at the bottom of the flange plate corresponds to the shallower second limiting hole.

[0016] Further, a limiting flange is arranged at the bottom of the flange plate.

[0017] The outer side of the limiting flange is provided with a smooth outer arc surface, the inner side of the release plate is provided with an inner arc surface matched with the outer arc surface, the release plate is sleeved on the outside of the limiting flange, and the release plate can rotate and move along the axial direction of the limiting flange.

[0018] Further, a plurality of second fixing portions are arranged around the outer side of the limiting flange, a plurality of positioning screw holes matched with the second fixing portions are arranged on the stator, a shaft sleeve penetrating through the second fixing portions is arranged between the flange plate and the stator, the shaft sleeve is through-penetrated, and the flange plate and the stator are connected through a penetrating screw rod penetrating through the shaft sleeve.

[0019] Further, a sleeve shell with a smooth outer surface is sleeved on the outside of the shaft sleeve, and a through hole matched with the sleeve shell is arranged on the armature.

[0020] Therefore, when the brake of the brake is braked, the coil is de-energized, the force generated by the spring acts on the armature, the rotor is tightly clamped between the armature and the flange plate, so as to generate a friction force, prevent the rotor from rotating, and the lever is in the braking position.

[0021] When the brake is released, the stator is powered, the coil in it generates an electromagnetic field under the action of direct current, the electromagnetic force overcomes the spring force, and the armature is attracted to the stator. The push-pull electromagnet is powered, the lever is pulled to the release position, the release plate is rotated to the release position, the stator is powered off, the force generated by the spring acts on the ball head support seat through the armature and the release plate, the push-pull electromagnet is powered off, and the lever remains in the release position. At this time, the entire brake does not need to be powered, the rotor is in a released state, and the brake is released.

[0022] When the brake is switched from the released state to the braking state again, the coil is powered, the electromagnetic force overcomes the spring force, and the armature is attracted to the stator. The release plate is released, the spring in the push-pull electromagnet acts on the lever, the lever drives the release plate to rotate to the braking position, the coil is powered off, and the brake is rebraked.

[0023] Thus, the device overturns the traditional electromagnetic brake in the prior art, and the traditional working mode of being powered on to open and powered off to brake. The brake does not need to be powered for a long time to remain in an open state in the equipment running condition, thereby reducing unnecessary energy loss. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the device;

[0025] Figure 2 It is a schematic diagram of the operation principle of the device;

[0026] Figure 3 It is a sectional view of the structure of the device;

[0027] Figure 4 It is an exploded view of the structure of the device;

[0028] Figure 5 It is a sectional view of the fixing structure of the stator and the flange plate;

[0029] Figure 6 It is a schematic diagram of the internal structure of the push-pull mechanism;

[0030] Figure 7 It is an enlarged view of the A part of Figure 4 ;

[0031] In the drawings:

[0032] 1-flange plate; 101-fixed block; 102-through screw; 103-axle sleeve; 104-sleeve;

[0033] 2-release plate; 21-first limiting hole; 22-second limiting hole; 3-armature;

[0034] 4-spring; 41-limiting flange; 411-first fixed part; 412-second fixed part;

[0035] 5 - stator; 51 - spring slot; 52 - positioning screw hole;

[0036] 6 - friction plate; 7 - coil; 8 - rotor; 9 - shaft sleeve; 10 - ball head support seat; 11 - gasket;

[0037] 12 - push-pull mechanism; 121 - telescopic rod; 122 - return spring; 13 - shifting lever; 131 - third fixed part. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0039] It should be noted that, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] Meanwhile, in the description of the present application, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In order to make the purpose, technical solutions and advantages of the present application more clear and explicit, the present application will be further described in detail below with reference to the drawings. It should be understood that the specific embodiments described here are only used to explain the present application and do not limit the present application.

[0042] Prior art example 1

[0043] The following uses the structure possessed by the drawings of the present application Figure 1 and the drawings of the present application Figure 2 to briefly describe the prior art. It should be noted that the following drawings of the present application Figure 1 , the drawings of the present application Figure 2Technical terms in the specification are only explanations of the relevant structures of the prior art to help the reader fully understand the technical defects of the prior art, and not a limitation of the components of the present application.

[0044] The prior art brake includes a stator 5 which can be fixed on the mounting surface of the equipment by bolts. The middle part of the stator 5 is provided with a through hole, and a shaft sleeve 9 which can rotate is arranged in the through hole. The shaft sleeve 9 is provided with a rotor 8 which can rotate synchronously with the shaft sleeve 9. The rotor 8 is provided with friction plates 6 on both sides. Specifically, the shaft sleeve 9 is fixedly connected with the target transmission shaft through a flat key, interference or the like. The shaft sleeve 9 is connected with the rotor 8 through a spline fit. The top of the stator 5 is fixedly connected with a flange plate 1 through bolts. The flange plate 1 is provided with a gap with the stator 5.

[0045] The prior art is characterized in that an armature 3 is arranged in the gap, and the armature 3 can move along the height direction of the gap. Specifically, the outer ring side of the rotor 8 is fixedly connected with a brake disc, and the brake disc is arranged between the armature 3 and the flange plate 1. The friction plates 6 are arranged on both sides of the brake disc. That is, the friction plates 6 on the rotor 8 are arranged between the armature 3 and the flange plate 1.

[0046] The braking principle of the prior art brake is that when the armature 3 moves towards the flange plate 1, the gap between the armature 3 and the flange plate 1 is reduced, so that the rotor is clamped, the friction plates 6 provide friction, the rotor is slowed down, and the effect of braking is achieved.

[0047] To achieve the above principle, the prior art is implemented in that a coil 7 is arranged on the stator 5. When the coil 7 is energized, a strong magnetism can be generated, so that the armature 5 is attracted to move in the gap. At the same time, the stator 5 is provided with a spring groove 51, and the inside of the spring groove 51 is provided with a spring 4 which is fixedly connected with the armature 5. Thus, when the equipment does not need to be braked, the coil 7 is in an energized state, the armature 3 is attracted to the side close to the stator 5 by the coil 7, the gap is in a maximum state at this time, and the rotor 8 can rotate freely. When braking is needed, the coil 7 is de-energized, the armature 3 is subjected to the restoring force of the springs 4, so that the armature 3 is tightly attached to the friction plates 6 of the rotor 8, and the effect of braking is achieved.

[0048] This makes the conventional electromagnetic brake in the prior art application be opened when energized and be braked when de-energized. That is, during the operation of the equipment, the coil needs to be energized for a long time to keep the brake open. During the use, unnecessary energy consumption cannot be ignored.

[0049] Embodiment 1

[0050] Referring to the accompanying drawings Figure 1 and the accompanying drawings Figure 2The purpose of this invention is to provide an energy-saving electromagnetic brake. It is worth noting that the following description of various structural components in this invention includes several structural components with the same names as those in "Example 1 of the Prior Art Description," and the descriptions in the following embodiments serve to explain the limitations of the various structural components of this invention.

[0051] This invention discloses an energy-saving electromagnetic brake, comprising a stator 5, which can be bolted to a mounting surface of an equipment. A through hole is provided in the center of the stator 5, and a rotatable bushing 9 is disposed within the through hole. A rotor 8, capable of rotating synchronously with the bushing 9, is mounted on the bushing 9. Friction plates 6 are provided on both sides of the rotor 8. Specifically, the bushing 9 is connected and fixed to the target drive shaft by means of a key, interference fit, etc., and the bushing 9 and the rotor 8 are connected by a spline fit. A flange 1 is bolted to the top of the stator 5, and a gap is provided between the flange 1 and the stator 5.

[0052] Specifically, a brake disc is fixedly connected to the outer ring of the rotor 8. The brake disc is positioned between the armature 3 and the flange 1, and friction plates 6 are provided on both sides of the brake disc. In other words, the friction plates 6 on the rotor 8 are located between the armature 3 and the flange 1.

[0053] The stator 5 is equipped with a coil 7. When the coil 7 is energized, it generates a strong magnetism, thereby attracting the armature 5 to move within the gap. At the same time, the stator 5 is equipped with a spring groove 51, inside which is a spring 4 fixedly connected to the armature 5. The spring 4 can apply a pushing force to the armature 5.

[0054] In other words, the movement principle of the armature 5 within the gap is consistent with existing technology, which is to achieve the back-and-forth movement of the armature 5 through the attraction of the coil 7 and the reset action of several springs 4. That is, when the coil 7 is energized, the armature 5 can be attracted and pressed against the stator 5; when the coil 7 is de-energized, the armature 5 is pushed away from the stator 5 by the springs 4.

[0055] Based on the above, the differences between this invention and the prior art are as follows:

[0056] A release plate 2 is installed on the side of the gap near the flange 1 to limit the movement of the armature 3. The armature 3 is installed on the side near the stator 5; both the release plate 2 and the armature 3 move within the gap. See appendix. Figure 2 The positions of the various structures shown are as follows: the release plate 2 is located between the flange 1 and the armature 3; the armature 3 is located between the flange 1 and the stator 5; and the rotor 8 is located between the flange 1 and the armature 3. The brake is equipped with an external cooperating mechanism. Under the adjustment of this mechanism, the release plate 2 can move within the gap and maintain its position; in other words, the external cooperating mechanism can adjust the position of the release plate 2 within the gap and lock its position.

[0057] Based on the above, the present application differs from the prior art in that it can achieve the following effects:

[0058] When the position of the release plate 2 in the gap is adjusted by the external matching mechanism to be close to the flange plate 1, the armature 3 can be freely attached to the friction plate 6 on the rotor 8 under the driving of the spring 4, thereby achieving the effect of braking.

[0059] When braking is not needed, the coil 7 is energized, instantly attracting the armature 3 to overcome the elastic force of the spring 4, thereby re-releasing the brake. At this time, the external matching mechanism adjusts the position of the release plate 2 in the gap to be away from the flange plate 1, and locks the position of the release plate 2. At this time, the coil 7 is de-energized, and the armature 3 will be attached to the release plate 2 under the pushing of the spring 4, and will not be attached to the friction plate 6. Thus, stable operation can be achieved in the state that the coil 7 is de-energized.

[0060] When braking is needed again, the external matching mechanism controls the movement of the release plate 2, adjusts the position of the release plate 2, so that the armature 3 is attached to the friction plate 6 under the pushing of the spring 4, thereby achieving the effect of braking.

[0061] Subsequently, when the brake needs to be canceled, the coil 7 is re-energized to attract the armature, the external matching mechanism controls the release plate 2 to be locked in a position away from the flange plate 61, and the coil 7 is re-de-energized, thereby forming a cycle. Thus, the technical scheme of the present application can keep the brake open for a long time in the state that the coil 7 is not energized, thereby avoiding unnecessary energy loss during equipment operation.

[0062] Example 2

[0063] Based on Example 1, see the attached Figure 1 - attached Figure 7 , the present application gives one of the embodiments of the external matching mechanism controlling the position of the release plate 2 and achieving locking. The external matching mechanism includes a push-pull mechanism 12 installed on the flange plate 1, and a lever 13 hingedly connected to the flange plate 1. The release plate 2 is sleeved on the flange plate 1 and can rotate and move in the axial direction of the flange plate 1. The release plate 2 is fixedly connected with a third fixed part 131, one end of the lever 13 is installed on the output end of the push-pull mechanism 12, and the other end of the lever 13 is matched with the third fixed part 131. The output end of the push-pull mechanism 12 can realize extension and retraction, and when the push-pull mechanism 12 extends and retracts, it can drive the lever 13 to rotate around the hinge point, thereby driving the release plate 2 to rotate at the other end of the lever 13.

[0064] More specifically, see the attached Figure 1The specific arrangement of the push-pull mechanism 12, the push rod 13, the third fixing part 131 and the release plate 2 is that: the end of the push rod 13 close to the push-pull mechanism 12 is provided with a connecting column, the output end of the push-pull mechanism 12 is fixedly connected with an L-shaped structure, the L-shaped structure is provided with a reserved hole matched with the connecting column, and a certain movement allowance is arranged between the reserved hole and the connecting column, so that the movement stroke of the push rod 13 is not blocked when the output end of the push-pull mechanism 12 moves. Similarly, the end of the push rod 13 close to the third fixing part 131 is provided with a clamping groove matched with the cylindrical third fixing part 131, and the movement stroke of the push rod 13 is also not blocked when the output end of the push-pull mechanism 12 moves.

[0065] The flange plate 1 is provided with a plurality of ball head support seats 10, the ball head support seats 10 are provided with ball heads penetrating through the flange plate 1, and the top of the release plate 2 is provided with a plurality of groups of limiting holes, each group of limiting holes includes first limiting holes 21 and second limiting holes 22 with different depths, and the depth of the first limiting holes 21 is deeper than that of the second limiting holes 22. When the push-pull mechanism 12 drives the release plate 2 to rotate to two different positions, the ball head corresponds to the first limiting holes 21 or the second limiting holes 22.

[0066] For this embodiment, when the output end of the push-pull mechanism 12 is stretched, the push rod 13 drives the release plate 2 to rotate counterclockwise, at this time, the ball head at the bottom of the flange plate 1 corresponds to the first limiting holes 21, and the ball head can be sunk into the first limiting holes 21 with a certain depth, corresponding to the braking state of the brake; when the output end of the push-pull mechanism 12 is retracted, the push rod 13 drives the release plate 2 to rotate clockwise, at this time, the ball head at the bottom of the flange plate 1 corresponds to the second limiting holes 22, and the ball head can be sunk into the first limiting holes 21 with a slightly shallower depth, corresponding to the non-braking state of the brake.

[0067] When in the braking state, the push-pull mechanism 12 drives the push rod 13, the push rod 13 drives the release plate 2, so that the ball head corresponds to the first limiting holes 21 with a deeper depth, at this time, the coil 7 is in a power-off state, so the armature 3 is pushed by the spring 4 to tightly contact the friction plate 6, and braking is performed.

[0068] When the brake is switched from the braking state to the non-braking state, the coil 7 is powered on, the armature 3 is instantaneously attracted by the coil 7, in this process, the output end of the push-pull mechanism 12 is stretched to drive the release plate 2 to rotate. Due to the action of the ball head, the release plate 2 is simultaneously lifted by the ball head and moves towards the release plate 2 when rotating, at this time, the ball head at the bottom of the flange plate 1 corresponds to the second limiting holes 22 with a shallower depth, the coil 7 is powered off, the armature 3 is pushed by the spring 4, but cannot contact the friction plate 6 due to the limitation of the release plate 2, so that the non-braking state of the brake can be maintained under the condition that the coil 7 is powered off.

[0069] When the brake is converted from non-braking state to braking state, the output end of the push-pull mechanism 12 is retracted, driving the release plate 2 to rotate so that the ball head at the bottom of the flange plate 1 corresponds to the first limiting hole 21 with a relatively deep depth, and the armature 3 is in close contact with the friction plate 6 to brake under the pushing force of the spring 4. Thus, the cycle is completed, thereby achieving the effect of maintaining the non-braking state of the device by using a small amount of electricity of the external cooperation mechanism, instead of a large amount of electricity of the coil 7.

[0070] For the cooperation of the whole process, the operation cooperation of the push-pull mechanism 12 and the coil 7 is controlled by the controller. The process only involves the on-off of the coil 7 and the on-off of the push-pull mechanism 12; and the control process such as the coil 7 being powered on first, then the push-pull mechanism 12 being powered on, and finally the coil 7 being powered off can be realized by using a simple computer program and circuit control, so it is not described here.

[0071] Embodiment 3

[0072] Based on embodiment 2, referring to the attached Figure 4 The present application gives one of the embodiments of the installation cooperation of each structure inside the brake.

[0073] The top of the flange plate 1 is fixedly connected with a fixed block 101 through bolts, the middle of the flange plate 1 is provided with a through hole, and the bottom of the flange plate 1 is provided with a limiting flange 41. The top of the limiting flange 41 is provided with a first fixed part 411, and the limiting flange 41 is bolted with the fixed block 101 through the first fixed part 411. That is, the flange plate 1, the limiting flange 41 and the fixed block 101 are bolted as a whole.

[0074] The outer ring side of the limiting flange 41 is provided with a plurality of second fixed parts 412.

[0075] The inner ring side of the release plate 2 is provided with a plurality of notches capable of cooperating with the outer side of the limiting flange 41. The plurality of notches can accommodate the second fixed parts 412 outside the limiting flange 41 one by one, and have a movement allowance of the second fixed parts 412. That is, the movement allowance can ensure that the second fixed parts 412 will not block the rotation stroke of the release plate 2 when the release plate 2 rotates.

[0076] Meanwhile, the part between the adjacent two second fixed parts 412 on the outer ring side of the limiting flange 41 is a smooth outer arc surface, and the part between the notches on the inner side of the release plate 2 is provided with an inner arc surface cooperating with the above outer arc surface. The two cooperate to make the release plate 2 sleeved outside the limiting flange 41, so that the limiting flange 41 plays a limiting role on the release plate 2. The release plate 2 can rotate within a certain range and move along the axis direction of the limiting flange 41.

[0077] Referring to the attached Figure 4 and the attachedFigure 5 As attached Figure 5 The flange 1 and stator 5 are shown. The stator 5 is provided with a number of positioning screw holes 52. The positioning screw holes 52 are located in the same position as the second fixing part 412. That is, the number of positioning screw holes 52 are provided in a one-to-one correspondence with the number of second fixing parts 412.

[0078] A bushing 103, passing through the second fixing part 412, is sandwiched between the flange 1 and the stator 5. The bushing 103 is vertically continuous, and the flange 1 and the stator 5 are fixedly connected by a through bolt passing through the bushing 103. A sleeve 104 with a smooth outer surface is fitted over the bushing 103. The armature 3 has a through hole that mates with the sleeve 104. Thus, the fit between the bushing 103 and the sleeve 104 can limit the armature 3. Under its limitation, the armature 3 can move up and down in the positive direction, thereby achieving its original effect of sticking to the friction plate 6 for braking.

[0079] Example 4

[0080] Based on embodiment 3, the present invention provides one embodiment of the push-pull mechanism 12 that is more energy-efficient.

[0081] The push-pull mechanism 12 uses a common push-pull electromagnet, whose operating principle is mainly based on the principle that current passing through a coil generates a magnetic field. Push-pull electromagnets typically consist of a moving iron core and a stationary iron core, enabling linear reciprocating motion. Push-pull electromagnets are divided into two types: pull and push. Pull electromagnets return to their initial state after power is cut off via a return spring, while push electromagnets limit the distance pushed out via a push rod and a stop.

[0082] This embodiment uses a pull-type electromagnet; see attached document. Figure 6 The push-pull mechanism 12 has a telescopic rod 121, and a return spring 122 for resetting the telescopic rod 121 is provided between the telescopic rod 121 and the inner housing of the push-pull mechanism 12.

[0083] In the initial state of this embodiment, when the coil inside the push-pull mechanism 12 is not energized, the reset spring 122 causes the telescopic rod 121 to extend, and the lever 13 drives the release plate 2 to rotate counterclockwise. At this time, the ball head at the bottom of the flange 1 corresponds to the deeper first limiting hole 21. At this time, the ball head can be inserted into the first limiting hole 21 with a certain depth, corresponding to the braking state of the brake.

[0084] When the brake is released, the coil 7 and the coil inside the pull electromagnet are energized at the same time, the output end of the push-pull mechanism 12 is retracted, the release plate 2 is rotated clockwise by the push rod 13, the ball head at the bottom of the flange plate 1 corresponds to the second limiting hole 22, at this time the coil 7 is de-energized, the armature 3 is moved to the friction plate 6 under the push of the spring 4 but is blocked by the release plate 2, the armature 3 presses the release plate 2, so that the ball head is slightly sunk into the first limiting hole 21 with a certain force, corresponding to the non-braking state of the brake. At this time, the coil inside the pull electromagnet is also de-energized, the output end of the pull electromagnet is in a retracted state, the return spring 122 is compressed, and because the ball head is sunk in the second limiting hole 22 and is pushed by the armature 3, the release plate 2 is difficult to rotate under the action of the return spring 122 inside the push-pull mechanism 12, and the ball head is also difficult to come out of the second limiting hole 22. Thus the brake maintains the non-braking state.

[0085] When the brake needs to be re-applied, the coil 7 only needs to be energized for a short time and then de-energized, so that the armature 3 does not press the release plate 2 for a short time, at this time the release plate 2 is rotated under the action of the return spring 122 inside the pull electromagnet, the ball head at the bottom of the flange plate 1 corresponds to the deeper first limiting hole 21, the ball head can be sunk into the first limiting hole 21 with a certain depth, corresponding to the braking state of the brake, and the armature 3 is pushed by the spring 4 to brake.

[0086] Thus the cycle is repeated, so as to realize the state switching and maintaining of the brake and the non-braking of the brake by a small amount of electricity.

[0087] Of course, the present application can have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application, but these corresponding changes and modifications should all belong to the protection scope of the claims attached to the present application.

Claims

1. An energy-saving electromagnetic brake, comprising a stator (5), a middle part of the stator (5) being provided with a rotor (8) capable of rotating synchronously with a target transmission shaft, the rotor (8) being provided with a friction plate (6); the stator (5) is fixedly connected with a flange plate (1), and a gap is arranged between the stator (5) and the flange plate (1); a movable armature (3) is arranged in the gap; a coil (7) and a spring (4) cooperating with the armature (3) are arranged on the stator (5); the spring (4) can push the armature (3) away from the stator (5) to make the armature (3) abut against the friction plate (6) to brake; the coil (7) can attract the armature (3) to be close to the stator (5) to make the armature (3) separate from the friction plate (6) to cancel the braking; characterized in that a release plate (2) for limiting the armature (3) is arranged on one side of the gap close to the flange plate (1); an external cooperation mechanism capable of controlling the release plate (2) to limit or cancel the limitation of the armature (3) is arranged on the brake.

2. The energy-saving electromagnetic brake according to claim 1, characterized in that The external cooperation mechanism can adjust the position of the release plate (2) in the gap and lock the position of the release plate (2).

3. The energy-saving electromagnetic brake according to claim 2, wherein The release plate (2) is sleeved on the flange plate (1) and can rotate and move along the axial direction of the flange plate (1); a third fixing part (131) is arranged on the release plate (2); the external cooperation mechanism comprises a push-pull mechanism (12) arranged on the flange plate (1) and a lever (13) hingedly connected to the flange plate (1); one end of the lever (13) is arranged on the output end of the push-pull mechanism (12), and the other end is arranged in cooperation with the third fixing part (131); a plurality of ball heads are arranged on the flange plate (1), and a plurality of groups of limiting holes cooperating with the ball heads are arranged on the release plate (2), each group of the limiting holes comprising a first limiting hole (21) and a second limiting hole (22), the depth of the first limiting hole (21) being deeper than that of the second limiting hole (22); when the release plate (2) rotates to two different positions, the ball head corresponds to the first limiting hole (21) or the second limiting hole (22) respectively.

4. The energy-saving electromagnetic brake according to claim 3, wherein The push-pull mechanism (12) adopts a push-pull electromagnet.

5. The energy-saving electromagnetic brake according to claim 4, wherein The output end of the push-pull mechanism (12) is a telescopic rod (121), and a reset spring (122) for resetting the telescopic rod (121) is arranged in cooperation between the telescopic rod (121) and the inner shell of the push-pull mechanism (12); when the coil in the push-pull mechanism (12) is not powered, the reset spring (122) pushes the telescopic rod (121) to elongate, at this time, the ball head at the bottom of the flange plate (1) corresponds to the deeper first limiting hole (21); when the coil in the push-pull mechanism (12) is powered, the coil in the push-pull mechanism (12) pulls the telescopic rod (121) to contract, at this time, the ball head at the bottom of the flange plate (1) corresponds to the shallower second limiting hole (22).

6. The energy-saving electromagnetic brake according to claim 5, wherein A limiting flange (41) is arranged at the bottom of the flange plate (1). The outer ring side of the limiting flange (41) is provided with a smooth outer arc surface, the inner side of the release plate (2) is provided with an inner arc surface matched with the outer arc surface, the release plate (2) is sleeved on the outside of the limiting flange (41), and the release plate (2) can rotate and move along the axis direction of the limiting flange (41).

7. The energy-saving electromagnetic brake according to claim 6, wherein The outer ring side of the limiting flange (41) is provided with a plurality of second fixing parts (412), the stator (5) is provided with a plurality of positioning screw holes (52) matched with the second fixing parts (412), the flange plate (1) and the stator (5) are clamped with the shaft sleeve (103) penetrating through the second fixing parts (412), the shaft sleeve (103) penetrates up and down, and the flange plate (1) and the stator (5) are connected through the penetrating screw rod penetrating through the shaft sleeve (103).

8. The energy-saving electromagnetic brake according to claim 7, wherein The outer part of the shaft sleeve (103) is sleeved with a sleeve shell (104) with a smooth outer surface, and the armature (3) is provided with a penetrating hole matched with the sleeve shell (104).

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