Dry type electromagnetic brake

Abstract

The utility model relates to the technical field of electromagnetic brakes, in particular to a dry type electromagnetic brake. The dry type electromagnetic brake comprises a driving wheel support, a brake shell and a motor base, and the driving wheel support, the brake shell and the motor base are sequentially installed and distributed. Wherein a driving wheel is rotationally mounted in the driving wheel support, and a connecting shaft is arranged at the axis position of the driving wheel; an armature is fixedly mounted on the outer side of the driving wheel; a connecting shaft penetrates through the axis position of the brake shell, and a brake assembly is arranged at the position, corresponding to the position where the fixed armature is installed on one side of the driving wheel support, in the brake shell. After the braking assembly arranged on the dry type electromagnetic brake is powered on to operate, the rotating driving wheel can be braked, and air heat generated in the brake shell can be discharged in time when the driving wheel is braked.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic brakes, specifically a dry electromagnetic brake. Background Art

[0002] For some passenger transportation equipment, the braking time and braking distance of the passenger transportation equipment need to be short; for current passenger transportation equipment, the common braking methods are motor braking or motor reverse braking; among them, the motor reverse braking method is applicable to passenger transportation equipment with light weight and small inertial force; while the motor braking method is applicable to robots with a relatively low center of gravity of the passenger transportation equipment and will not tip forward due to the action of friction and inertia; for most passenger transportation equipment, with heavy weight and high center of gravity, the above braking methods are not applicable, and direct motor deceleration needs to be applied; if direct motor deceleration is applied, the braking distance is too long to meet the safety requirements of the passenger transportation equipment;

[0003] A related technology provides an electromagnetic brake for passenger transportation equipment. The electromagnetic brake includes: a driving wheel support, a motor mounting seat, a motor, a connecting shaft and a driving wheel. The driving wheel support is fixed on the robot chassis. The motor mounting seat is fixed on the driving wheel support. The motor is connected to the connecting shaft by a key. The connecting shaft is connected to the driving wheel. It also includes an electromagnetic brake armature and an electromagnetic brake yoke. Among the two components of the electromagnetic brake armature and the electromagnetic brake yoke, one component is fixed on the driving wheel support, and the other component rotates with the driving wheel. There is a certain gap between the electromagnetic brake armature and the electromagnetic brake yoke; when the electromagnetic brake yoke is energized, it is attracted to the electromagnetic brake armature and dry friction occurs, thereby generating a certain braking torque to stop the passenger transportation equipment;

[0004] However, the defect problems existing during the braking of this electromagnetic brake are also obvious. For example, after the yoke is energized and attracted to the electromagnetic brake armature, when dry friction occurs, a large amount of heat will be generated. If these heats are not dissipated in time and are inside the driving wheel housing; making the armature and the yoke in a high-temperature working environment will accelerate the thermal damage of the armature and the yoke;

[0005] Aiming at the problems in the above background art, the utility model aims to provide a dry electromagnetic brake. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a dry electromagnetic brake to solve the problems put forward in the above background art.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] Dry electromagnetic brake, the dry electromagnetic brake includes:

[0009] A driving wheel support, a brake housing, and a motor base, which are installed and distributed in sequence; wherein, a driving wheel is rotatably installed inside the driving wheel support, and a connecting shaft is provided at the axial center position of the driving wheel; at the same time, an armature is installed and fixed outside the driving wheel.

[0010] The connecting shaft passes through the axial center position of the brake housing, and a braking assembly is provided inside the brake housing at a position corresponding to the side of the driving wheel support where the armature is installed and fixed. After being energized and running, the braking assembly can not only brake the rotating driving wheel, but also timely discharge the air heat generated inside the brake housing when braking the driving wheel.

[0011] A motor is installed inside the motor base, and the output end of the motor is key-connected to one end of the connecting shaft.

[0012] As a further solution of the present invention: the braking assembly includes a yoke, a magnetic pole, and a movable rod. A yoke is provided at one end of the magnetic pole, a movable rod is connected and installed at the other end of the magnetic pole. A slide plate is provided at the end part of one end of the movable rod after passing through the inner wall of the brake housing, and the slide plate is installed and slidably limited inside the chute opened on the brake housing; at the same time, a compression spring is sleeved on the part of the movable rod between the outer wall of the brake housing and the slide plate.

[0013] As a further solution of the present invention: the inside of the movable rod is in a hollow state, and leakage holes are opened on the outer surface of the movable rod.

[0014] As a further solution of the present invention: a safety circuit is adapted to the coil sleeved outside the magnetic pole.

[0015] As a further solution of the present invention: the safety circuit includes a transformer and a rectifier, the transformer and the rectifier are electrically connected in sequence, a change-over switch is provided at the output end of the rectifier, the output end of the rectifier is later branched into a parallel circuit, a coil is installed on one path, and a resistor and a diode are respectively provided on the other path in sequence.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] Compared with the current electromagnetic brake, the dry electromagnetic brake has the following advantages:

[0018] First, by setting the braking assembly, after being energized and running, the set braking assembly can not only brake the rotating driving wheel, but also timely discharge the air heat generated inside the brake housing when braking the driving wheel.

[0019] For example, when the set braking component performs dry braking on the rotating driving wheel, for example, after the braking component is powered on, the coil sleeved outside the magnetic pole generates an electromagnetic field, causing attraction, which is used to make the yoke and the armature approach each other until finally the yoke fits with the armature, generating damping friction on the rotating armature to cause braking;

[0020] When the yoke approaches and fits with the armature, after the set connecting shaft slides and displaces into the inside of the driving wheel support, when the yoke brakes the rotating driving wheel and then generates more heat inside the driving wheel support, the heat inside the driving wheel support enters the inside of the movable rod through the leakage holes and finally circulates through the movable rod to accelerate heat dissipation;

[0021] Second, the coil sleeved outside the magnetic pole is adapted with a safety circuit, and the resistance of the safety circuit is used to protect the coil; for example, it is set so that the induced overvoltage will not break down the coil insulation when power is off. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0023] Figure 1 It is a schematic structural diagram of the dry electromagnetic brake according to the embodiment of the present invention.

[0024] Figure 2 It is a schematic structural diagram of the braking component of the dry electromagnetic brake according to the embodiment of the present invention.

[0025] Figure 3 It is a schematic diagram of the safety circuit of the coil of the dry electromagnetic brake according to the embodiment of the present invention.

[0026] In the figure: 1 - driving wheel support, 2 - driving wheel, 3 - connecting shaft, 4 - armature, 5 - brake housing, 6 - braking component, 7 - motor base, 8 - motor, 9 - yoke, 10 - coil, 11 - magnetic pole, 12 - slide plate, 13 - movable rod, 14 - compression spring, 15 - leakage hole, 16 - transformer, 17 - rectifier, 18 - changeover switch, 19 - resistor, 20 - diode. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further details the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] Embodiment

[0029] Please refer to Figure 1 、 Figure 2 and Figure 3 , the dry electromagnetic brake provided in the embodiment of the present utility model, the dry electromagnetic brake includes:

[0030] A driving wheel support 1, a brake housing 5 and a motor base 7, which are sequentially installed and distributed; wherein, a driving wheel 2 is rotatably installed inside the driving wheel support 1, and a connecting shaft 3 is provided at the axial center position of the driving wheel 2; at the same time, an armature 4 is fixedly installed outside the driving wheel 2;

[0031] The connecting shaft 3 passes through the axial center position of the brake housing 5, and a brake assembly 6 is provided inside the brake housing 5 at a position corresponding to the side of the driving wheel support 1 where the armature 4 is fixedly installed. After the set brake assembly 6 is energized and operates, it can not only brake the rotating driving wheel 2, but also timely discharge the air heat generated inside the brake housing 5 when braking the driving wheel 2;

[0032] A motor 8 is installed inside the motor base 7, and the output end of the motor 8 is key-connected to one end of the connecting shaft 3;

[0033] In the embodiment of the present utility model, when using the dry electromagnetic brake, after starting the motor 8, the motor 8 outputs kinetic energy to drive the connecting shaft 3 to rotate. When the connecting shaft 3 rotates, the driving wheel 2 installed on the connecting shaft 3 will be driven to rotate;

[0034] And when it is necessary to brake the rotating driving wheel 2, after the power is connected to the set brake assembly 6, the brake assembly 6 generates adsorption and adhesion with the armature 4 by electromagnetic induction near one end of the armature 4 installed on the driving wheel 2, and then frictionally brakes the rotating driving wheel 2 to achieve dry braking;

[0035] At the same time, during the process of the set brake assembly 6 performing dry braking on the rotating driving wheel 2, the heat generated inside the driving wheel support 1 can also be discharged through the set brake assembly 6 to achieve ventilation and heat dissipation;

[0036] Please refer to Figure 2 , in an embodiment of the present utility model, the brake assembly 6 includes a yoke 9, a magnetic pole 11 and a movable rod 13. A yoke 9 is provided at one end of the magnetic pole 11, a movable rod 13 is connected and installed at the other end of the magnetic pole 11, and a slide plate 12 is provided at the end part of one end of the movable rod 13 after passing through the inner wall of the brake housing 5. The slide plate 12 is installed in a limited sliding manner inside the chute opened in the brake housing 5; at the same time, a compression spring 14 is sleeved on the part of the movable rod 13 between the outer wall of the brake housing 5 and the slide plate 12;

[0037] In an embodiment of the present utility model, when the braking assembly 6 is used to perform dry braking on the rotating drive wheel 2, for example, when the braking assembly 6 is not powered on, the magnetic pole 11 provided slides and displaces under the action of the elastic variable generated by the deformation of the compression spring 14, so that the yoke 9 connected to one end of the magnetic pole 11 moves away from the armature 4, thereby generating a gap between the armature 4 and the yoke 9, facilitating the rotation of the drive wheel 2 to generate drive;

[0038] When the braking assembly 6 is powered on, the coil 10 sleeved outside the magnetic pole 11 generates an electromagnetic field, causing attraction, which is used to make the yoke 9 and the armature 4 approach each other until finally the yoke 9 and the armature 4 are in contact;

[0039] During the process of the yoke 9 and the armature 4 being in contact, the movable rod 13 provided also slides and displaces, driving the slide plate 12 to perform a limiting sliding displacement; during the sliding displacement of the slide plate 12, after the yoke 9 and the armature 4 are in contact in the later stage, when damping friction is generated on the rotating armature 4 during braking, due to the limitation of the slide plate 12, it is ensured that the yoke 9 will not rotate, and damping braking is generated;

[0040] Please refer to Figure 2 In an embodiment of the present utility model, the inside of the movable rod 13 is in a hollow state, and leakage holes 15 are provided on the outer surface of the movable rod 13;

[0041] When the yoke 9 approaches and is in contact with the armature 4, after the connecting shaft 3 provided slides and displaces into the drive wheel support 1, when the yoke 9 brakes the rotating drive wheel 2 and generates more heat inside the drive wheel support 1, the heat inside the drive wheel support 1 enters the inside of the movable rod 13 through the leakage holes 15 and finally circulates through the movable rod 13 to discharge the heat inside the drive wheel 2;

[0042] Please refer to Figure 3 In an embodiment of the present utility model, the coil 10 sleeved outside the magnetic pole 11 is adapted with a safety circuit, and the safety circuit includes a transformer 16 and a rectifier 17. The transformer 16 and the rectifier 17 are electrically connected in sequence. A changeover switch 18 is provided at the output end of the rectifier 17. The output end of the rectifier 17 is later branched into a parallel circuit. One path is provided with the coil 10, and the other path is provided with a resistor 19 and a diode 20 in sequence;

[0043] The input current is boosted by the transformer 16 and then rectified by the provided rectifier 17 and then flows through the coil 10 and the resistor 19 respectively; the provided coil 10 generates an electromagnetic field after being powered on; and the installed resistor 19 is used to protect the coil 10; for example, it is provided so that the induced overvoltage will not break down the insulation of the coil 10 when power is off;

[0044] In the description of the present utility model, unless otherwise clearly stipulated and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dry electromagnetic brake, comprising: Drive wheel A support (1), a brake housing (5) and a motor seat (7), wherein the driving wheel support (1), the brake housing (5) and the motor seat (7) are installed and distributed in sequence; wherein a driving wheel (2) is rotatably installed inside the driving wheel support (1), and a connecting shaft (3) is provided at the axis center position of the driving wheel (2); and an armature (4) is fixedly installed outside the driving wheel (2); and the characteristics are: The connecting shaft (3) passes through the axis of the brake housing (5), and a brake assembly (6) is provided inside the brake housing (5) at a position corresponding to the fixed armature (4) installed on one side of the drive wheel support (1), which can not only brake the rotating drive wheel (2) after power is turned on, but also can timely discharge the air heat generated inside the brake housing (5) when braking the drive wheel (2); The brake assembly (6) comprises a yoke (9), a magnetic pole (11) and a movable rod (13); one end of the magnetic pole (11) is provided with a yoke (9); the other end of the magnetic pole (11) is connected to and mounted with the movable rod (13); a coil (10) is mounted on the magnetic pole (11); a slide plate (12) is provided at the end portion of the movable rod (13) after passing through the inner wall of the brake housing (5); the slide plate (12) is limitedly slidably mounted inside a slide groove provided in the brake housing (5); at the same time, a compression spring (14) is mounted on the portion of the movable rod (13) between the outer wall of the brake housing (5) and the slide plate (12); the interior of the movable rod (13) is in a hollow state, and a leakage hole (15) is provided on the outer surface of the movable rod (13); A motor (8) is installed inside the motor seat (7), and the output end of the motor (8) is connected to one end of the connecting shaft (3) via a key.

2. The dry electromagnetic brake according to claim 1, characterized in that: The coil (10) mounted outside the magnetic pole (11) is equipped with a safety circuit.

3. The dry electromagnetic brake according to claim 2, characterized in that: The safety circuit comprises a transformer (16) and a rectifier (17), wherein the transformer (16) and the rectifier (17) are electrically connected in sequence, a conversion switch (18) is provided at the output end of the rectifier (17), and the output end of the rectifier (17) is later branched into a parallel circuit, wherein a coil (10) is installed on one circuit and a resistor (19) and a diode (20) are respectively provided on the other circuit.

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