WO2020118791A1

WO2020118791A1 - Drive motor having electromagnetic brake

Info

Publication number: WO2020118791A1
Application number: PCT/CN2018/124845
Authority: WO
Inventors: 滕义松; 谢秀斌; 范祥新; 李沙; 张莉娟; 滕无敌
Original assignee: 徐州南普机电科技有限公司
Priority date: 2018-12-13
Filing date: 2018-12-28
Publication date: 2020-06-18
Also published as: CN109340284A

Abstract

A drive motor having an electromagnetic brake, comprising a motor shell (1), a drive shaft (2), and an electromagnetic brake (3). The electromagnetic brake (3) comprises a housing (3-1), fixed magnetic pieces (3-2), and movable magnets (3-3). An annular embedding groove (3-11) is provided in the housing (3-1). The fixed magnetic pieces (3-2) and the movable magnets (3-3) are circumferentially and evenly arranged in the annular embedding groove (3-11). The movable magnets (3-3) comprise cylindrical iron cores (3-31), brakes (3-32), and electrified coils (3-33) winding on the outer sides of the iron cores. The inner side surfaces of the brakes (3-32) with respect to the annular embedding groove (3-11) are axially provided with chamfers. A conical hole structure is formed among the plurality of iron cores (3-31). The electrified coils (3-33) are connected to a storage battery (4) of an electric vehicle. In the case that the Ay (4) is electrified, the iron cores (3-31) and the fixed magnetic pieces (3-2) generate a same magnetic field and repel each other, and thus do not brake the drive shaft (2). When a relay switch (5) is in an off state, the electrified coils (3-33) lose power, the iron cores (3-31) move forward under the attraction of the fixed magnetic pieces (3-2) and the action of a spring (3-34), a conical hole of the brakes (3-32) presses the drive shaft (2) to stop same, thereby implementing a braking function. The drive motor can implement automatic power-off braking, thereby effectively preventing the occurrence of slipping when a vehicle stops.

Description

Drive motor with electromagnetic brake

Technical field

The invention relates to an electric vehicle motor, and specifically discloses a driving motor with an electromagnetic brake.

Background technique

At present, electric brakes or foot brakes are mostly used for electric vehicles on the market. Since mechanical brakes require a certain amount of effort, improper operation will affect the braking effect.

Summary of the invention

In order to solve the above technical problems, the present invention provides a driving motor with an electromagnetic brake. The technical scheme adopted by the present invention is: a drive motor with an electromagnetic brake, including a motor housing, a drive shaft, and an electromagnetic brake; the electromagnetic brake includes a housing, a fixed magnetic plate, and a moving magnet; The rear part protrudes, the electromagnetic brake is sleeved on the outside of the drive shaft, and is fixed to the motor casing by bolts; the casing is provided with a ring-shaped embedded groove, at least three sets of fixed magnetic pieces and moving magnets, and the circumferential direction is evenly distributed in the ring shape In the mounting groove, a fixed magnetic piece is provided corresponding to a moving magnet; the moving magnet includes a cylindrical iron core, a holding brake, and a current-carrying coil wound around the iron core. One end of the iron core passes through the spring and the groove wall of the fitting groove Connected, the other end is a movable end connected with a brake, the iron core is parallel to the drive shaft and the movable end of the drive shaft is disposed opposite to the end of the drive shaft; the brake is arranged axially with respect to the inner side of the annular insertion groove There is a chamfered surface, and a tapered hole structure is formed between multiple iron cores. The diameter of the front end of the tapered hole is larger than the diameter of the drive shaft, and the diameter of the rear end is smaller than the diameter of the drive shaft; the fixed magnetic piece is installed corresponding to the movable end of the iron core; The energizing coil is connected to the battery of the electric vehicle, and a relay switch is provided on the line; the relay switch is in a normally closed state. When the battery power supply is energized, the energizing coil is energized, and the iron core generates the same magnetic field as the fixed magnetic sheet. Repulsion, no brake on the drive shaft, the motor runs normally; when the relay switch is off or the power supply is cut off, the energizing coil loses power, and the iron core is moved forward by the attraction of the fixed magnetic sheet and the action of the spring. The tapered hole of the holding brake squeezes the drive shaft to stop it, which acts as a brake.

The rear surface of the motor shell is provided with bolt holes for installing electromagnetic brakes;

Friction pads are provided on the inclined plane.

The outer gap of the brake is fitted with a ferrule, and a cross bar is symmetrically fixed on the ferrule, a spring is sleeved on the cross bar, one end of the spring is fixedly connected with the cross bar, and the other end is connected with the shell, and the shell A bar groove capable of passing through the cross bar is opened, and the cross bar and the spring are in clearance fit with the bar groove; the outer end of the cross bar is connected with a handle through a bolt, and the handle is operated to make the cross bar drive the hoop to rotate, so that the holding The brake holds the drive shaft to achieve braking. The inner side of the ferrule is provided with a non-slip layer.

The beneficial effects of the present invention are: the electromagnetic brake can realize automatic braking when the power is turned off, and effectively prevent the vehicle from sliding when parking; the set of brake system has a simple structure and avoids cumbersome mechanical installation; the system is also in emergency situations. Hand brake can be used instead of electromagnetic brake.

BRIEF DESCRIPTION

Figure 1 is a schematic diagram of the structure of a drive motor with an electromagnetic brake.

detailed description

As shown in FIG. 1, a drive motor with an electromagnetic brake includes a motor housing 1, a drive shaft 2 and an electromagnetic brake 3. The drive shaft 2 extends from the rear of the motor housing 1, and the electromagnetic brake 3 is fitted in the drive The outside of the shaft 2 is fixed to the motor housing 1 by bolts; the electromagnetic brake 3 includes a housing 3-1, a fixed magnetic sheet 3-2 and a moving magnet 3-3; Mounting slot 3-11, fixed magnet piece 3-2 and moving magnet 3-3 are arranged in at least three groups, and the circumferential direction is evenly distributed in annular embedded groove 3-11, one fixed magnet piece 3-2 is corresponding to one moving magnet 3-3 The moving magnet 3-3 includes a cylindrical iron core 3-31, a holding brake 3-32, and an energizing coil 3-33 wound around the outside of the iron core. One end of the iron core 3-31 is inserted into the ring through the spring 3-34 The slot wall of the slot 3-11 is connected, the other end is a movable end connected with a brake 3-32, the iron core 3-31 is parallel to the drive shaft 2 and its movable end is disposed opposite the end of the drive shaft 2; The holding brake 3-32 is provided with a chamfered surface along the axial direction with respect to the inner side surface of the annular fitting groove 3-11, and a tapered hole structure is formed between a plurality of iron cores 3-31, and the front end diameter of the tapered hole is larger than that of the drive shaft 2 diameter, the diameter of the rear end is smaller than the diameter of the drive shaft 2; the fixed magnetic piece 3-2 is installed corresponding to the movable end of the iron core 3-31; the energizing coil 3-33 is connected to the battery 4 of the electric vehicle and is provided on the line The relay switch 5; the relay switch 5 is in a normally closed state. When the battery 4 is energized, the energizing coil 3-33 has electricity, and the iron core 3-31 generates the same magnetic field as the fixed magnetic piece 3-2. Without braking the drive shaft 2, the motor runs normally; when the relay switch 5 is off or the power supply is cut off, the energizing coil 3-33 loses power, and the iron core 3-31 is attracted by the fixed magnetic piece 3-2 Moving forward with the action of the spring 3-34, the tapered hole of the holding brake 3-32 squeezes the drive shaft 2 to stop it, acting as a brake.

The rear surface of the motor housing 1 is provided with bolt holes for installing the electromagnetic brake 3;

Friction pads 3-4 are provided on the chamfered surface.

The outer gap of the report brake 3-32 is fitted with a ferrule 3-5, and a cross bar 3-6 is symmetrically fixed on the ferrule 3-5, and a spring 3-7 is sleeved on the cross bar 3-6. One end of 3-7 is fixedly connected to the cross bar 3-6, and the other end is connected to the housing 3-1. The housing 3-1 is provided with a bar groove that can pass through the cross bar. The cross bar 3-6 and the spring 3- 7 Clearly cooperate with the rod groove; the outer end of the cross bar 3-6 is connected with a handle 3-8 through a bolt, and the handle is operated to make the cross bar 3-6 drive the hoop 3-5 to rotate, thereby making the brake 3-32 Hold the drive shaft 2 to brake. The inner side of the ferrule 3-5 is provided with a non-slip layer.

Claims

A driving motor with an electromagnetic brake is characterized in that it includes a motor housing, a drive shaft and an electromagnetic brake; the electromagnetic brake includes a housing, a fixed magnetic sheet and a moving magnet; the drive shaft is formed by the rear of the motor housing The electromagnetic brake is fitted outside the drive shaft, and is fixed to the motor casing by bolts; the casing is provided with a ring-shaped embedded groove, and at least three sets of fixed magnet pieces and moving magnets are arranged, and the circumferential direction is uniformly distributed in the ring-shaped embedded In the slot, a fixed magnetic piece is set corresponding to a moving magnet; the moving magnet includes a cylindrical iron core, a holding brake, and a current-carrying coil wound around the iron core. One end of the iron core is connected to the slot wall of the mounting slot through a spring. The other end is a movable end connected with a brake. The iron core is parallel to the drive shaft and the movable end is opposite to the end of the drive shaft; the brake is axially inclined with respect to the inner side of the annular insertion groove In the cut surface, a tapered hole structure is formed between a plurality of iron cores. The diameter of the front end of the tapered hole is larger than the diameter of the drive shaft, and the diameter of the rear end is smaller than the diameter of the drive shaft; the fixed magnetic piece is installed corresponding to the movable end of the iron core; The coil is connected to the battery of the electric vehicle, and a relay switch is set on the line; the relay switch is in a normally closed state. When the battery is energized, the energized coil has electricity, and the iron core generates the same magnetic field as the fixed magnet. The drive shaft generates braking and the motor runs normally; when the relay switch is off or the power supply is powered off, the energizing coil loses power, the iron core is moved forward by the attraction of the fixed magnetic sheet and the action of the spring, and the brake The tapered hole squeezes the drive shaft to stop it and acts as a brake.
The driving motor with electromagnetic brake according to claim 1, wherein a bolt hole for installing an electromagnetic brake is provided on the rear end surface of the motor shell.
The driving motor with electromagnetic brake according to claim 1, wherein a friction pad is provided on the chamfered surface.
The driving motor with electromagnetic brake according to claim 1, characterized in that a ferrule is fitted to the outer gap of the brake, a cross bar is symmetrically fixed on the ferrule, and the cross bar is sleeved with Spring, one end of the spring is fixedly connected to the cross bar, and the other end is connected to the housing. The housing is provided with a rod groove that can pass through the cross bar. The cross bar and the spring are in clearance fit with the rod groove; the outer side of the cross bar The end is connected with a handle through a bolt, and the handle is operated to make the crossbar drive the hoop to rotate, so that the brake can hold the drive shaft to achieve braking.
The drive motor with electromagnetic brake according to claim 4, wherein the inner side of the ferrule is provided with a non-slip layer.