Disc brake structure of disc motor

Abstract

The utility model belongs to motor field, especially involve a disc motor with disc brake structure, including disc motor body, disc motor body includes casing, the middle part of casing is equipped with through -hole, and the through -hole is passed and has the pivot, the annular armature that is movably connected with on pivot, armature is located in second accommodating cavity and is with the position of disc coil is adapted, the outside of pivot is equipped with compression spring, and one end of compression spring is against casing, and the other end of compression spring is against armature. This design has the advantages such as small, light in weight, high efficiency, braking response is quick, and braking effect is stable and heat dissipation is quick.

Description

Technical Field

[0001] This utility model belongs to the field of electric motors, and specifically relates to a disc electric motor with a disc brake structure. Background Technology

[0002] A motor with brakes typically consists of a motor body, a brake unit, a brake control system, and a cooling system. However, existing motors with brakes use independent structures for the windings and brake coils, resulting in a relatively large size, the use of more materials, and high costs. For example, the main structure of a traditional braked motor generally includes: the motor body, comprising components such as the stator and rotor. The stator is generally made of cast iron or welded steel plates and is the part that generates the rotating magnetic field, consisting of an iron core and windings. The rotor is mostly made of cast aluminum or aluminum alloy and is the component that generates electromagnetic torque and outputs mechanical energy under the action of the rotating magnetic field. It is connected to the motor shaft and rotates with the shaft. The brake unit includes an electromagnetic brake assembly, which consists of a brake coil, armature disc, spring, brake disc, brake cover, etc. The brake coil is an electromagnet coil fixed on the rear cover. When direct current is applied, it generates a strong electromagnetic attraction. The armature disc is located between the brake coil and the brake disc. It can move axially but cannot rotate. Its movement direction is usually restricted by a guide pin. When energized, the armature disc is attracted by the electromagnetic force generated by the brake coil and moves towards the brake coil, separating from the brake disc. When de-energized, the armature disc is pressed tightly against the brake disc under the action of the spring force. The spring is generally strongly compressed. The spring, initially compressed, applies force to the brake disc. When the motor is de-energized, the spring releases its elasticity, pushing the armature disc to press against the brake disc. This is the primary power source for braking when power is off. The brake disc is rigidly connected to the motor output shaft via a key or spline, rotating with the motor shaft. It engages with the brake friction pads inside the armature disc or brake cover to generate frictional torque for braking. The brake cover is a stationary component with brake friction pads on its inner side, which engage with the friction surface of the brake disc to generate friction during braking, preventing the rotation of the brake disc and motor shaft. The brake control system, including control circuitry, controls the starting and stopping of the brake motor, as well as the timing and force of braking. It can be integrated with the motor's main control system or be an independent control system. The cooling system, including a fan, is typically installed at the rear of the motor or other suitable location, rotating with the motor shaft. It forces airflow to remove heat generated during motor operation, preventing overheating. However, the above-mentioned traditional brake motors have the following problems: (1) Concentrated braking heat. The heat generated by the friction between the brake pads and the brake disc during braking is concentrated in a small area, making heat dissipation relatively difficult. Frequent or long-term braking may lead to a decrease in braking performance; (2) High maintenance cost. The components of the disc brake system have high precision requirements. For example, the brake pads and brake discs need to be replaced in time when they are worn to a certain extent. Moreover, the professional requirements for technicians are also high during maintenance; (3) Limited braking torque. Compared with some large drum brakes, the braking torque of disc brake motors is relatively limited, which limits their application in some heavy equipment that requires large braking torque. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a disc motor with a disc brake structure.

[0004] A disc motor with a disc brake structure includes a disc motor body, the disc motor body including a housing, a through hole in the middle of the housing through which a rotating shaft passes, a front cover and a rear cover on the left and right sides of the housing respectively, a first receiving cavity formed between the housing and the front cover, and a second receiving cavity formed between the housing and the rear cover; a turntable is fixed on the rotating shaft, the turntable is located in the first receiving cavity, a disc coil is provided inside the housing, and a permanent magnet is fixed on the side of the turntable near the disc coil; a ring-shaped armature is movably connected to the rotating shaft. The armature is located in the second receiving cavity and is adapted to the position of the disc coil. A compression spring is sleeved on the outer side of the rotating shaft. One end of the compression spring abuts against the housing, and the other end of the compression spring abuts against the armature. A friction plate is fixed on the inner side of the rear end cover. A brake disc is provided between the armature and the friction plate. The brake disc has a mounting hole in the middle for the rotating shaft to pass through. A first tooth is provided on the inner wall of the mounting hole. A second tooth is provided on the rotating shaft to mesh with the first tooth, and the length of the second tooth is greater than the length of the first tooth.

[0005] Furthermore, the turntable has several first fixing grooves on one side near the disc coil, and the several first fixing grooves are arranged in a ring on the outside of the rotating shaft, and the permanent magnet is disposed in the first fixing groove.

[0006] Furthermore, the housing has a first annular mounting groove on one side near the turntable, and a plurality of evenly arranged embedding grooves are formed on the bottom surface of the first mounting groove; the disc coil includes a bracket adapted to the number of embedding grooves, one side of the bracket is embedded in the embedding groove, and the other side of the bracket is covered with an insulating layer, and a winding is wound around the outside of the insulating layer; the height of the bracket is equal to the sum of the depth of the first mounting groove and the embedding grooves; the first mounting groove is filled with epoxy resin.

[0007] Furthermore, the support is made of a soft magnetic alloy.

[0008] Furthermore, a second mounting groove is provided on the side of the housing near the armature, the rotating shaft passes through the center of the second mounting groove, the compression spring is disposed in the second mounting groove, and the length of the compression spring is greater than the depth of the second mounting groove.

[0009] Furthermore, the rear end cover has a plurality of second fixing grooves on the side near the brake disc, and the plurality of second fixing grooves are arranged in a ring on the outside of the rotating shaft, and the friction plate is disposed in the second fixing groove.

[0010] Furthermore, the rear end cover is provided with a plurality of positioning pins, and the armature is provided with positioning holes for inserting the positioning pins.

[0011] Furthermore, the front cover and the rear cover are respectively connected to the housing by bolts.

[0012] The beneficial effects of this utility model are: (1) It has the advantages of disc motors: small size, light weight, high efficiency, high power density and torque density, simple spatial arrangement, flexible topology, high reliability and strong adaptability. (2) It responds quickly and has a short braking response time. It can brake quickly at the moment of power failure and move synchronously with the motor. (3) Stable braking effect. It relies on the force of the compressed spring to push the armature to press the brake disc and friction pad, generating frictional torque for braking. The braking performance is reliable and stable. (4) The structure is compact, with the disc brake structure and motor sharing a single electromagnetic coil, thus taking up less space; (5) Fast heat dissipation: The winding is wound on a soft magnetic alloy bracket, and the soft magnetic alloy is embedded in the motor housing to form a complete heat dissipation path. At the same time, the turntable also rotates under the action of the magnetic field, which can help to dissipate heat.

[0013] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A partial structural cross-sectional schematic diagram of this utility model is shown; Figure 2 A partial structural exploded view of the turntable is shown; Figure 3 A partial structural exploded view of the disc coil is shown; Figure 4 An exploded view of part of the structure at the rear end cover is shown; Figure 5 An exploded view of part of the structure of this utility model is shown.

[0016] In the diagram: 1. Shaft; 101. Second tooth; 2. Front end cover; 3. Housing; 301. First mounting groove; 302. Embedding groove; 4. Rear end cover; 401. Second fixing groove; 402. Positioning pin; 5. Compression spring; 6. Friction plate; 7. Brake disc; 8. Armature; 9. Disc coil; 901. Bracket; 902. Insulation layer; 903. Winding; 10. Permanent magnet; 11. Turntable; 1101. First fixing groove. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] like Figure 1-5As shown, a disc motor with a disc brake structure includes a disc motor body, which includes a housing 3. A through hole is provided in the middle of the housing 3, through which a rotating shaft 1 passes. A front cover 2 and a rear cover 4 are respectively provided on the left and right sides of the housing 3. A first receiving cavity is formed between the housing 3 and the front cover 2, and a second receiving cavity is formed between the housing 3 and the rear cover 4. A turntable 11 is fixed on the rotating shaft 1, and the turntable 11 is located within the first receiving cavity. A disc coil 9 is provided inside the housing 3, and a permanent magnet 10 is fixed on the side of the turntable 11 near the disc coil 9. A rotating shaft 1 is movably connected to a... A ring-shaped armature 8 is located in the second receiving cavity and is adapted to the position of the disc coil 9. A compression spring 5 is sleeved on the outer side of the rotating shaft 1. One end of the compression spring 5 abuts against the housing 3, and the other end of the compression spring 5 abuts against the armature 8. A friction plate 6 is fixed on the inner side of the rear end cover 4. A brake disc 7 is provided between the armature 8 and the friction plate 6. The brake disc 7 has a mounting hole in the middle for passing through the rotating shaft 1. A first tooth is provided on the inner wall of the mounting hole. A second tooth 101 is provided on the rotating shaft 1 that meshes with the first tooth, and the length of the second tooth 101 is greater than the length of the first tooth. In this design, the motor is a disc motor. When energized, the alternating magnetic field of the disc coil 9 drives the permanent magnet 10 to rotate, which in turn drives the shaft 1 to rotate. At the instant the disc coil 9 is energized, it generates a magnetic force that attracts the armature 8 and compresses the compression spring 5, causing the armature 8 to stop pressing against the brake disc 7. The brake disc 7 then disengages from the friction plate 6 and moves towards the armature 8 under the axial pressure from the friction plate 6 until it automatically finds the point of minimum axial force during rotation. It then rotates synchronously with the shaft 1, ensuring the operation of the motor. When the power is cut off, the disc coil 9 loses its magnetic attraction to the armature 8, and the compression spring 5 immediately pushes the armature 8 to press the brake disc 7 tightly against the friction plate 6. Under the action of friction, the motor stops operating.

[0019] like Figure 2 As shown, the turntable 11 has several first fixing grooves 1101 on one side near the disc coil 9. These first fixing grooves 1101 are arranged in a ring on the outer side of the rotating shaft 1. A permanent magnet 10 is disposed in each of the first fixing grooves 1101 to facilitate fixing the permanent magnet 10. Specifically, the permanent magnet 10 has a fan-shaped structure and is fixed in the first fixing groove 1101 by adhesive.

[0020] like Figure 3As shown, the housing 3 has a first annular mounting groove 301 on one side near the turntable 11. Several evenly arranged embedding grooves 302 are formed on the bottom surface of the first mounting groove 301. The disc coil 9 includes a bracket 901 matching the number of embedding grooves 302. One side of the bracket 901 is embedded in the embedding groove 302, and the other side of the bracket 901 is covered with an insulating layer 902. A winding 903 is wound around the outside of the insulating layer 902. The height of the bracket 901 is equal to the sum of the depths of the first mounting groove 301 and the embedding grooves 302. The first mounting groove 301 is filled with epoxy resin, facilitating the formation of an integrated housing 3 assembly with superior structural strength. The bracket 901 is made of a soft magnetic alloy. Specifically, during installation, the bracket 901 is first pressed into the embedding groove 302. The bracket 901 and the embedding groove 302 are interference-fitted. One end of the bracket 901 is flush with the opening of the embedding groove 302 on the side away from the first mounting groove 301. An insulating layer 902 is fitted on the surface of the bracket 901 located outside the embedding groove 302. Then, the winding 903 is fitted onto the insulating layer 902, and the winding 903 is wired. The wire ends are connected to the installation wire, and the installation wire is led out from the wire hole on the housing. Then, potting is performed by pouring epoxy resin into the first mounting groove 301 so that the epoxy resin completely covers the winding 903, and the epoxy resin liquid level is flush with the height of the bracket 901 located outside the embedding groove 302. The potting fixture is completed. After the epoxy resin is completely cured, an integrated housing 3 assembly is formed.

[0021] like Figure 1 As shown, a second mounting groove is provided on the side of the housing 3 near the armature 8. The rotating shaft 1 passes through the center of the second mounting groove. The compression spring 5 is set in the second mounting groove, and the length of the compression spring 5 is greater than the depth of the second mounting groove, so as to facilitate the installation of the compression spring 5 and ensure the installation depth of the compression spring 5, so as to facilitate the use of a compression spring 5 with sufficient elasticity, and so that the armature 8 can be further close to the disc coil 9 after installation, thereby ensuring the attraction effect of the disc coil 9 on the armature 8.

[0022] like Figure 4 As shown, the rear end cover 4 has several second fixing grooves 401 on the side near the brake disc 7. These second fixing grooves 401 are arranged in a ring on the outer side of the rotating shaft 1. Friction pieces 6 are installed in the second fixing grooves 401 to facilitate the fixing of the friction pieces 6. Specifically, the friction pieces 6 have a fan-shaped structure and are fixed in the second fixing grooves 401 by adhesive.

[0023] like Figure 5As shown, the armature 8 has a pivot hole in the middle for the shaft 1 to pass through, thus facilitating the movable connection between the armature 8 and the shaft 1. To prevent the armature 8 from affecting the operation of the motor by rotating with the shaft 1, the rear end cover 4 is provided with several positioning pins 402, and the armature 8 is provided with positioning holes for inserting the positioning pins 402, so that the rotation of the armature 8 can be restricted after the positioning pins 402 are inserted into the positioning holes.

[0024] like Figure 5 As shown, to facilitate motor installation, the front cover 2 and the rear cover 4 are connected to the housing 3 by bolts. Specifically, the front cover 2 and the rear cover 4 are connected to the rotating shaft 1 by bearings.

[0025] This utility model provides a disc motor with a disc brake structure, which has advantages such as small size, light weight, high efficiency, rapid braking response, stable braking effect, and fast heat dissipation. It can be applied in various fields, such as: in the automotive field, this design can ensure that vehicles can achieve fast and smooth braking during driving, improving driving safety; in the field of industrial automation, such as electric hoists, chain hoists, and crane trolleys, which require precise positioning and rapid braking, this design can meet the above requirements and ensure the safety and efficiency of the production process; in the field of robotics, robots need to frequently start and stop and accurately position themselves during task execution, and the rapid response and stable braking performance of this design can make robot movements more precise and reliable; in the field of machine tool equipment, metal processing machine tools, woodworking machinery, etc., require the motor to stop quickly during processing to ensure processing accuracy and operator safety, and this design can meet this requirement.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A disc motor with a disc brake structure, comprising a disc motor body, the disc motor body including a housing, the housing having a through hole in the middle, through which a rotating shaft passes, characterized in that, The left and right sides of the housing are respectively provided with a front end cover and a rear end cover, a first receiving cavity is formed between the housing and the front end cover, and a second receiving cavity is formed between the housing and the rear end cover; A turntable is fixed on the rotating shaft. The turntable is located in the first receiving cavity. A disc coil is provided inside the housing. A permanent magnet is fixed on the side of the turntable near the disc coil. A ring-shaped armature is movably connected to the rotating shaft. The armature is located in the second receiving cavity and is adapted to the position of the disc coil. A compression spring is sleeved on the outside of the rotating shaft. One end of the compression spring abuts against the housing, and the other end of the compression spring abuts against the armature. A friction plate is fixed on the inner side of the rear end cover. A brake disc is provided between the armature and the friction plate. The brake disc has a mounting hole in the middle for passing through the rotating shaft. A first tooth is provided on the inner wall of the mounting hole. A second tooth is provided on the rotating shaft to mesh with the first tooth, and the length of the second tooth is greater than the length of the first tooth.

2. A disc motor with a disc brake structure as described in claim 1, characterized in that, The turntable has several first fixing slots on one side near the disc coil. The several first fixing slots are arranged in a ring on the outside of the rotating shaft, and the permanent magnet is disposed in the first fixing slot.

3. A disc motor with a disc brake structure as described in claim 1, characterized in that, The housing has a first mounting groove in the shape of an annulus on the side surface near the turntable, and a number of evenly arranged embedding grooves are formed on the bottom surface of the first mounting groove. The disc coil includes a bracket adapted to the number of the embedding slots. One side of the bracket is embedded in the embedding slot, and the other side of the bracket is covered with an insulating layer. A winding is wound around the outside of the insulating layer. The height of the bracket is equal to the sum of the depths of the first mounting slot and the embedding slot; The first mounting groove is filled with epoxy resin.

4. A disc motor with a disc brake structure as described in claim 3, characterized in that, The support is made of soft magnetic alloy.

5. A disc motor with a disc brake structure as described in claim 1, characterized in that, The housing has a second mounting groove on the side near the armature. The rotating shaft passes through the center of the second mounting groove. The compression spring is disposed in the second mounting groove, and the length of the compression spring is greater than the depth of the second mounting groove.

6. A disc motor with a disc brake structure as described in claim 1, characterized in that, The rear end cover has several second fixing grooves on the side near the brake disc. The several second fixing grooves are arranged in a ring on the outside of the rotating shaft, and the friction plate is disposed in the second fixing groove.

7. A disc motor with a disc brake structure as described in claim 1, characterized in that, The rear end cover is provided with a number of positioning pins, and the armature is provided with positioning holes for inserting the positioning pins.

8. A disc motor with a disc brake structure as described in claim 1, characterized in that, The front cover and the rear cover are respectively connected to the housing by bolts.

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