Motor brake

Abstract

The utility model discloses a motor brake which comprises a motor and a brake mechanism arranged at the rear end of the motor, the brake mechanism comprises a magnet yoke assembly, an armature assembly, a brake plate and a fan blade structure, the magnet yoke assembly comprises a magnet yoke body and a magnet yoke coil arranged in the magnet yoke body, and a rectifier is fixedly installed on the peripheral side wall of the magnet yoke body. The rectifier is electrically connected with the magnet yoke coil, so that the rectifier and the brake mechanism are assembled into a whole and then are combined with the motor for use, single-phase alternating current is supplied when a product works, and the alternating current is subjected to half-wave rectification to form direct current through the rectifier, so that the use requirement of the motor on the direct current is met; in this way, wiring connection between the rectifier and the motor is facilitated, installation of a junction box is omitted, the overall space utilization rate is higher, the installation size is reduced, the size of the motor is reduced, cost is saved, and the use performance of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of brakes, in particular to a motor brake. Background Art

[0002] A brake is a device that has the function of slowing down, stopping or keeping a moving part (or moving machinery) stopped. It is a mechanical part that stops or slows down the moving parts in the machinery, commonly known as a brake. Brakes are needed in existing AC servo motors. Brakes are mainly used to brake servo motors and keep them in the required position.

[0003] The motor brakes on the market are mainly composed of motors and brake bodies, and most of them work in alternating current. In order to meet the equipment's demand for direct current, a rectifier is configured on the motor. The basic principle of the rectifier is to use the conduction and cutoff characteristics of electronic components to convert alternating current into direct current. It can also regulate voltage and current and protect equipment. The existing practice is to install the rectifier on the outside of the motor brake through a junction box, and then connect the rectifier to the coil of the motor brake to achieve a circuit connection. However, this installation method still has the following problems: the rectifier needs to be installed on the motor through a junction box, which takes up a large space and is cumbersome to install, which will increase the product size and thus increase costs. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problem in the prior art that the rectifier needs to be installed on the motor through a junction box, which takes up a large installation space and is cumbersome to install, thus increasing the product size and cost.

[0005] In order to solve the above problems, the utility model provides a motor brake, including a motor and a braking mechanism arranged at the rear end of the motor, the braking mechanism including a yoke assembly, an armature assembly, a brake plate and a fan blade structure through which the rotor shaft of the motor can pass in sequence, the yoke assembly is fixed to the rear end of the motor, the brake plate and the fan blade structure are linked to the rotor shaft, the yoke assembly includes a yoke body and a yoke coil arranged in the yoke body, a rectifier is fixedly mounted on the outer peripheral side wall of the yoke body, and the rectifier is electrically connected to the motor coil and the yoke coil.

[0006] In the above-mentioned motor brake, a mounting plane is milled on the outer peripheral side wall of the yoke body, and the rectifier is mounted on the mounting plane through a connecting structure.

[0007] In the above-mentioned motor brake, the rectifier includes a rectifier housing and a rectifier circuit board, and the connection structure is a screw structure, a rivet structure or an adhesive structure connecting the rectifier housing and the mounting plane.

[0008] In the above-mentioned motor brake, the screw structure is a nylon screw, and a threaded hole matching the nylon screw is provided on the installation plane.

[0009] In the above-mentioned motor brake, the rectifier further includes an input wire and an output wire passing through the rectifier housing, and the rectifier is electrically connected to the yoke coil through the output wire.

[0010] In the above-mentioned motor brake, the armature assembly is movably arranged between the yoke assembly and the brake plate, a gap is formed between the armature assembly and the brake plate, and a spring structure is connected between the armature assembly and the yoke assembly along the axial direction of the rotor shaft.

[0011] In the above-mentioned motor brake, the armature assembly includes an armature body and a friction plate arranged on one side of the armature body and opposite to the brake plate. The friction plate is in an annular shape, and an annular protrusion matching the friction plate is correspondingly provided on the brake plate.

[0012] In the above-mentioned motor brake, the fan blade structure is integrally formed on the side of the brake plate facing away from the armature assembly, and the fan blade structure is composed of a plurality of heat dissipation blades spaced apart along the circumferential direction.

[0013] In the above-mentioned motor brake, the yoke body, the armature body and the brake plate are respectively provided with through-hole structures through which the rotor shaft can pass, and the brake plate and the rotor shaft are connected by a flat key structure for torque transmission.

[0014] In the above-mentioned motor brake, a rotating disk is arranged at one end of the brake plate away from the armature assembly. An adjusting screw is formed at the center of the rotating disk. The adjusting screw is connected to an adjusting screw hole formed at the end of the rotor shaft. A plurality of connecting holes are spaced around the adjusting screw on the rotating disk. A screw hole is provided at one end of the brake plate. The rotating disk and the brake plate are fixedly connected by a fixing screw passing through the connecting hole and fastened to the screw hole.

[0015] The technical solution of the present utility model has the following advantages compared with the prior art:

[0016] 1. In the motor brake provided by the present utility model, by installing the rectifier on the outer peripheral side wall of the yoke body, such a design assembles the rectifier and the braking mechanism into an integral whole, and then combines it with the motor for use. When in use, single-phase alternating current is applied, and the rectifier half-wave rectifies the alternating current into direct current to meet the motor's demand for direct current. Such an installation design facilitates the wiring connection between the rectifier and the motor, eliminates the installation of the junction box, has a higher overall space utilization rate, reduces the installation volume, and adopting this structural design is beneficial to reducing the size of the motor, thereby saving costs. This motor brake with a built-in rectifier is suitable for installation in various narrow spaces, and has many advantages such as a compact structure, stable operation, reliable work, small occupied space, and convenient installation, improving the product's performance.

[0017] 2. In the motor brake provided by the present utility model, by milling an installation plane on the outer peripheral side wall of the yoke body and fixing the rectifier to the installation plane by means of a screw structure or a rivet structure or an adhesive structure, the fixed installation between the rectifier and the yoke body is realized. The advantage of such a design is that this rectifier has a variety of installation methods, and the installation is convenient and fast. By means of the installation plane, the installation height can be reduced and a larger space can be reserved for installing the rectifier, while ensuring the flatness of the rectifier installation position, avoiding the shaking of the rectifier during the operation of the motor brake, and thus ensuring the stability and reliability of the rectifier installation.

[0018] 3. In the motor brake provided by the present utility model, the rectifier is fixedly installed on the yoke body by means of nylon screws. These nylon screws have excellent insulation performance, no magnetism, heat insulation, high strength, and characteristics of high temperature and corrosion resistance. They can be used in combination with the threaded holes of the yoke body, and can well meet the requirements of insulating installation between the rectifier and the yoke body. And with the cooperation of an insulating heat shrink sleeve, the insulation protection effect of the rectifier can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art.

[0020] Figure 1 It is a schematic cross-sectional structure diagram of the motor brake of the present utility model;

[0021] Figure 2 It is a schematic installation structure diagram of the rectifier and the yoke assembly of the present utility model;

[0022] Figure 3 It is a schematic structure diagram of the braking mechanism of the present utility model;

[0023] Figure 4Schematic diagram of the installation structure of the rotating disk of the present utility model.

[0024] Description of reference numerals: 1. Motor; 11. Rotor shaft; 2. Yoke assembly; 20. Through-hole structure; 21. Yoke body; 22. Yoke coil; 3. Armature assembly; 31. Armature body; 32. Friction plate; 33. Spring structure; 4. Brake plate; 5. Blower structure; 6. Rectifier; 61. Input wire; 62. Output wire; 7. Installation plane; 8. Flat key structure; 9. Rotating disk, 91. Adjusting screw; 92. Fixing screw; 93. Connecting hole. Detailed implementation manners

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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 situations.

[0028] Embodiment

[0029] This embodiment provides as Figures 1-4A motor brake is shown, comprising a motor 1 and a braking mechanism arranged at the rear end of the motor, the braking mechanism comprising a yoke assembly 2, an armature assembly 3, a brake plate 4 and a fan blade structure 5 through which the rotor shaft 11 of the motor 1 can pass in sequence, the yoke assembly 2 is fixed to the rear end of the motor, the brake plate 4 and the fan blade structure 5 are arranged in linkage with the rotor shaft 11, the yoke assembly 2 comprises a yoke body and a yoke coil 22 arranged in the yoke body 21, a rectifier 6 is fixedly mounted on the outer peripheral side wall of the yoke body, and the rectifier 6 is electrically connected to the motor 1 coil and / or the yoke coil 22.

[0030] In the above embodiment, by installing the rectifier 6 on the outer peripheral side wall of the yoke body, the design is to assemble the rectifier 6 and the braking mechanism into a whole, and then use it in combination with the motor 1. When in use, single-phase alternating current is passed, and the alternating current is half-wave rectified into direct current by the rectifier 6 to meet the motor 1's demand for direct current. This installation design facilitates the wiring connection between the rectifier 6 and the motor 1, eliminates the installation of the junction box, and has a higher overall space utilization rate, reducing the installation volume. The use of this structural design is conducive to reducing the size of the motor, thereby saving costs. This motor brake with a built-in rectifier is suitable for installation in various narrow spaces, and has many advantages such as compact structure, smooth operation, reliable operation, small space occupation, and easy installation, thereby improving product performance.

[0031] In order to ensure the stability of the rectifier 6 installed on the yoke assembly 2, refer to Figure 2 A mounting plane 7 is milled on the outer peripheral side wall of the yoke body, and the rectifier 6 is mounted on the mounting plane 7 through a connecting structure, wherein the rectifier 6 includes a rectifier housing and a rectifier circuit board, and the connecting structure is preferably a screw structure connecting the rectifier 6 housing and the mounting plane 7, that is, the rectifier 6 is fixed to the mounting plane 7 through the screw structure, thereby realizing fixed installation between the rectifier 6 and the yoke body. The advantage of such a design is that the mounting plane 7 can reduce the installation height and reserve a larger space for installing the rectifier 6, while ensuring the flatness of the installation position of the rectifier 6, thereby avoiding the rectifier from shaking when the motor brake is working, thereby ensuring the stability and reliability of the rectifier installation.

[0032] As a preferred embodiment, the screw structure is a nylon screw, and a threaded hole matching the nylon screw is provided on the mounting plane 7. This nylon screw has excellent insulation properties, is non-magnetic, heat-insulating, has high strength, and is resistant to high temperatures and corrosion. It can be used in combination with the threaded hole of the yoke body 21, and can well meet the requirements of insulation installation between the rectifier 6 and the yoke body, and can greatly enhance the insulation protection effect of the rectifier 6 when combined with an insulating heat shrink sleeve.

[0033] In this embodiment, although the rectifier 6 preferably uses a screw structure to achieve a fixed connection with the yoke body, the setting method of the connection structure is not limited to the above one, and there can be other different setting methods. For example, the rectifier 6 can be fixed on the yoke body through a rivet structure; or, the rectifier 6 can also be fixed on the yoke body through an adhesive structure. Those skilled in the art can make a choice on the specific setting method of the connection structure according to the above description, and other equivalent embodiments will not be elaborated one by one here.

[0034] As Figure 2 shown, the rectifier 6 further includes an input wire 61 and an output wire 62 that penetrate through the rectifier housing. The rectifier 6 is electrically connected to the yoke coil through the output wire. The input wire 61 penetrates outside the motor brake for connecting to a power source, and the output wire 62 is for connecting to the motor 1 coil. The motor 1 coil and the yoke coil 22 are in an electrically connected relationship, so that the single-phase alternating current input is converted into direct current required for the operation of the motor brake through the rectifier 6. An insulating sleeve can also be sleeved outside the rectifier to play a role of insulating protection for the rectifier installed on the yoke assembly, protecting wires and other devices.

[0035] The following will Figures 1-3 make a detailed description of the specific setting method of the armature assembly and the brake plate:

[0036] The armature assembly 3 is movably arranged between the yoke assembly 2 and the brake plate 4. There is a gap between the armature assembly 3 and the brake plate 4. A spring structure 33 is connected between the armature assembly 3 and the yoke assembly 2 along the axial direction of the rotor shaft 11. The function of the spring structure 33 is to apply an elastic force to the armature structure to move it towards the side close to the brake plate 4. When the yoke assembly 2 is energized, an electromagnetic force will be generated to attract the armature assembly 3, so that the armature assembly 3 overcomes the elastic force of the spring structure 33 and moves towards the side away from the brake plate 4. Specifically, the armature assembly 3 includes an armature body 31 and a friction plate 32 arranged on one side of the armature body 31 and opposite to the brake plate 4. The friction plate 32 is annular, and a corresponding annular protrusion for cooperating with the friction plate 32 is provided on the brake plate 4. With this structural setting, when the motor is working normally, the yoke assembly 2 is energized to generate an electromagnetic force to suck the armature body 31 and the yoke body together, so that the friction plate 32 is driven by the armature body 31 to separate from the brake plate 4. At this time, the friction plate 32 does not apply a frictional resistance to the brake plate 4, and the motor 1 runs normally at this time; and when the motor 1 is powered off, the yoke assembly 2 is also powered off immediately. At this time, the armature assembly 3 drives the friction plate 32 to move towards the side close to the brake plate 4 under the action of the spring force, and a large frictional force is generated by the close fit of the friction plate 32 and the brake plate 4 to achieve the effect of braking the motor.

[0037] Further preferably, the yoke body, the armature body 31, and the brake plate 4 are respectively provided with through-hole structures 20 through which the rotor shaft 11 can pass. The brake plate 4 is connected to the rotor shaft 11 through a keyway structure 8 for torque transmission. With this structural arrangement, relying on the keyway structure 8 can prevent the rotor shaft 11 from slipping relative to the hub, thereby enabling the rotor shaft 11 to drive the brake plate 4 to rotate coaxially, and thus realizing the linkage cooperation between the brake plate 4 and the rotor shaft 11. Therefore, when the brake plate 4 is subjected to the frictional resistance generated by the extrusion of the friction plate 32, it will play a role in decelerating and braking the rotor shaft 11.

[0038] As Figure 1 shown, the blade structure is integrally formed on the side of the brake plate 4 facing away from the armature assembly 3. The blade structure is composed of a plurality of heat dissipation blades formed at intervals in the circumferential direction on the side of the brake plate 4. By designing the blade structure and the brake plate as an integral structure, the forming and manufacturing are convenient, the installation process is simplified, the installation space is reduced, which is beneficial to reducing the size of the motor and the brake, thereby saving costs. The designed motor brake is applicable to the combination of various small motors and single-plate brakes and is suitable for working under various narrow space environmental conditions, improving the product performance.

[0039] In this embodiment, referring to Figure 1 and Figure 3 , a rotating disk 9 is provided at one end of the brake plate 4 away from the armature assembly 3. An adjusting screw 91 is formed at the center of the rotating disk 9. The adjusting screw 91 is connected to an adjusting screw hole formed at the end of the rotor shaft 11. A plurality of connection holes 93 are arranged at intervals around the adjusting screw 91 on the rotating disk 9. A screw hole is provided at one end of the brake plate 4. The rotating disk 9 and the brake plate 4 are fixedly connected by a fixing screw 92 passing through the connection hole 93 and fastening to the screw hole. The adjusting screw 91 and the rotating disk 9 are integrally formed or welded and fixed. The advantage of this design is that by rotating the adjusting screw 91, the rotating disk 9 can be driven to move closer to or away from the rotor 1 side. Since the rotating disk 9 and the brake plate 4 are fixedly connected, by adjusting the installation position of the rotating disk 9, the braking gap distance between the brake plate and the armature assembly can be adjusted, effectively dealing with the situation where the brake plate wears and thins during long-term use to meet the braking distance requirements between the armature body and the brake plate.

[0040] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, based on the above description, other different forms of changes or variations can be made. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A motor brake, comprising a motor (1) and a brake mechanism arranged at the rear end of the motor, the brake mechanism comprising a yoke assembly (2), an armature assembly (3), a brake plate (4) and a fan blade structure (5) through which a rotor shaft (11) of the motor (1) can pass in sequence, the yoke assembly (2) is fixed to the rear end of the motor, the brake plate (4) and the fan blade structure (5) are arranged in linkage with the rotor shaft (11), and is characterized in that: The yoke assembly (2) comprises a yoke body and a yoke coil (22) arranged in the yoke body (21); a rectifier (6) is fixedly mounted on the outer peripheral side wall of the yoke body; the rectifier (6) is electrically connected to the yoke coil (22).

2. The motor brake according to claim 1, characterized in that: A mounting plane (7) is milled on the outer peripheral side wall of the yoke body, and the rectifier (6) is mounted on the mounting plane (7) via a connecting structure.

3. The motor brake according to claim 2, characterized in that: The rectifier (6) comprises a rectifier housing and a rectifier circuit board, and the connection structure is a screw structure, a rivet structure or an adhesive structure for connecting the rectifier housing and the mounting plane (7).

4. The motor brake according to claim 3, characterized in that: The screw structure is a nylon screw, and a threaded hole matching the nylon screw is provided on the mounting plane (7).

5. The motor brake according to claim 4, characterized in that: The rectifier (6) also comprises an input line (61) and an output line (62) passing through a rectifier housing, and the rectifier (6) is electrically connected to the yoke coil via the output line.

6. A motor brake according to any one of claims 1 to 5, characterized in that: The armature assembly (3) is movably arranged between the yoke assembly (2) and the brake plate (4), a gap is formed between the armature assembly (3) and the brake plate (4), and a spring structure (33) is connected between the armature assembly (3) and the yoke assembly (2) along the axial direction of the rotor shaft (11).

7. The motor brake according to claim 6, characterized in that: The armature assembly (3) comprises an armature body (31) and a friction plate (32) arranged on one side of the armature body (31) and opposite to the brake plate (4); the friction plate (32) is annular in shape, and the brake plate (4) is provided with an annular protrusion corresponding to the friction plate (32).

8. The motor brake according to claim 1, characterized in that: The fan blade structure is integrally formed on the side of the brake plate (4) facing away from the armature assembly (3), and the fan blade structure is composed of a plurality of heat dissipation blades formed at intervals along the circumferential direction on the side of the brake plate (4).

9. The motor brake according to claim 8, characterized in that: The yoke body, the armature body (31) and the brake plate (4) are respectively provided with through-hole structures (20) through which the rotor shaft (11) can pass, and the brake plate (4) and the rotor shaft (11) are connected via a flat key structure (8) for transmitting torque.

10. The motor brake according to claim 1, characterized in that: A rotating disk (9) is arranged at one end of the brake plate (4) away from the armature assembly (3); an adjusting screw (91) is formed at the center of the rotating disk (9); the adjusting screw (91) is connected to an adjusting screw hole formed at the end of the rotor shaft (11); a plurality of connecting holes (93) are arranged at intervals around the adjusting screw (91) on the rotating disk (9); a screw hole is arranged at one end of the brake plate (4); a fixing screw (92) is passed through the connecting hole (93) and fastened to the screw hole to keep the rotating disk (9) and the brake plate (4) fixedly connected.

Images