CN201113660Y

CN201113660Y - Braking electric motor

Info

Publication number: CN201113660Y
Application number: CNU2007201152933U
Authority: CN
Inventors: 张敏德
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-24
Filing date: 2007-09-24
Publication date: 2008-09-10
Anticipated expiration: 2017-09-24

Abstract

The utility model discloses a brake motor which comprises a motor body and a brake device. The motor body comprises a casing, a back end cover and a rotating shaft, the tail end of the rotating shaft of the motor body is extended out of the back end cover of the motor body, and the brake device is arranged on the outside of the back end cover. The brake device comprises an electromagnetic static suction cup fixed on the back end cover of the casing, a limiting piece which has a guiding element and fixed on the tail end of the rotating shaft, a movable suction cup capable of sliding on the limiting piece, an adjusting device for adjusting the clearance between the movable suction cup and the electromagnetic static suction cup, an elastic piece capable of supplying the movable suction cup with elasticity, and a thrust bearing arranged between the elastic piece and the movable suction cup. As the brake motor does not need overcoming the brake friction force and is started by the same starting current of a common motor without the brake device, the brake motor has the advantages of lower starting current and electric switch protection.

Description

Brake motor

Technical field

The utility model belongs to the electric motor structure design field, is specifically related to a kind of brake motor.

Background technology

Motor status and effect in modern society is very important, all be unable to do without the help of motor from the industrial technology to the daily life.

The method of general motor brake has: (1) stops to provide electric current to motor immediately, motor is run out of steam and progresses into halted state.But this kind mode required time is longer, can't reach the purpose that stops fully fast, can't satisfy instructions for use in many occasions.(2) provide reverse current for motor, make it that bigger deceleration be arranged, to finish brake rapidly, but in the electric motor system of no tach signal feedback, the method is difficult for learning accurately whether motor is complete actionless state, the phenomenon that brake or brake excessively cause counter-rotating might not take place to stop in advance especially in load not simultaneously.(3) the main frictional force that relies on is installed and stops the brake gear that makes the motor stall in motor.

Chinese patent literature CN2533607Y discloses a kind of mouse cage AC induction machine brake gear, form by stator, rotating shaft, rotor and shell, its design feature is: be vertically installed with the end that the axle between round pin, rotor and the round pin is provided with spring, cage rotor in the rotating shaft and be provided with end plate, place friction plate on the end cap and the brake between end plate and the friction plate, described brake is formed, and is screwed by sucker, brake core, spring, brake box; Described brake core is provided with the spline of protrusion, and brake box inwall is provided with the groove with spline fitted, is provided with spring between brake core and the detent box; Brake central authorities are provided with an axis hole, wherein also are provided with a radially long slot bore on the sucker; Round pin in the rotating shaft passes the slotted hole on the brake sucker, and brake in-core wall is spiral inclined-plane.The course of work of this kind motor is as follows: when electric motor starting, and the rotor induction, end plate produces electromagnetic attraction, the sucker of adhesive brake, and compression spring, brake rotates with rotor.When motor rotates, keep above-mentioned attracting state, guarantee that brake away from the friction plate on the end cap, does not influence the motor normal rotation.When motor cut off the power supply, rotor lost induction, and end plate 3 discharges the sucker of brake, and compressed spring promotes brake and breaks away from epitrochanterian end plate, and the round pin in the rotating shaft is in the spiral inner wall formula rotational slide of brake core.The brake core moves axially, and the compression spring transmits pressure and gives the brake box, and brake integral body is slided in rotating shaft, presses to the friction plate on the end cap, and the braking force that is produced makes the rotor braking brake.

The shortcoming of this kind motor brake gear is: during owing to the motor outage, the brake integral body in its brake gear is in the state that compresses the friction plate on the end cap always, also promptly is in braking state always; When this kind electric motor starting, need by a bigger starting current, could inhale the sucker of brake and open, motor could turn round.Bigger starting current all has higher requirement to motor itself and external power switch, if many this brake motors are housed under the power switch, need select for use the very big power switch of specification could guarantee not burnt.

Chinese patent literature CN2770211Y discloses a kind of motor brake gear, by motor, motor shaft, bearing part, the taper type brake member is formed, recessed taper type brake mount, spring, trundle is formed, motor is connected with motor shaft, motor shaft upper bearing (metal) spare, motor shaft is connected with the taper type brake, and give reduction box transmission of power by the other end of taper type brake member, at an end of reduction box casing by recessed taper type brake mount, the taper type brake member can move axially in the motor shaft upper edge, the taper type brake member has a small column before frustum, small column places the axis hole of recessed taper type brake mount, the front end of small column has travelling gear, this conventional gears can with the gears engaged in the reduction box; The taper type brake member has a hollow small column at frustum at big the end, one end of hollow small column has spring, the spring other end presses the bearing part on the motor shaft, trundle is arranged on motor shaft, hollow small column and motor shaft on the taper type brake member are slidingly connected, hollow small column has deep-slotted chip breaker vertically, and trundle is positioned at deep-slotted chip breaker.The course of work of this kind motor is as follows: during the motor energising, motor shaft drives trundle and rotates, because the taper type brake member is to slide on the motor shaft, running must lag behind under effect of inertia, trundle during rotation on the motor shaft can push away the deep-slotted chip breaker on the hollow small column, the taper type brake member is separated with recessed taper type brake mount, and spring is compressed, and reduction box spreads out of power.Motor stops operating moment during outage, under the effect of spring, the taper type brake member is moved axially to leaving motor direction, presses the inner conical surface of recessed taper type brake mount, reaches self-stopping purpose.

The shortcoming of this kind motor brake gear is: during owing to the motor outage, under the effect of spring, the taper type brake member is in the inner conical surface that presses recessed taper type brake mount always, also promptly is in braking state always; So when this kind electric motor starting, need could throw the taper type brake member that slides on the motor shaft away by a bigger starting current, motor could turn round.Bigger starting current all has higher requirement to motor itself and external power switch, if many this brake motors are housed under the power switch, need select for use the very big power switch of specification could guarantee not burnt.

The utility model content

To be solved in the utility model is that brake motor need be than the technical problem of great start-up current owing to need overcome the brake friction when starting.

Solving the technical problem that the utility model proposed is: a kind of brake motor comprises motor body and braking device; Described motor body has casing, rear end cap and rotating shaft; The tail end of described motor body rotating shaft stretches out the rear end cap of motor body, and described braking device is arranged on the outside of rear end cap; Described braking device comprises the quiet sucker of electromagnetic type that is fixedly installed on casing rear end and covers, be fixed on the locating part that is provided with guiding parts on the rotating shaft tail end, can be at the moving sucker that slides on the locating part, be used to regulate clearance distance between moving sucker and the quiet sucker of electromagnetic type adjusting device, for moving sucker the elastic component of reseting elasticity is provided and be arranged on elastic component and moving sucker between thrust bearing.

The quiet sucker of described electromagnetic type comprises the yoke that is arranged on casing rear end and covers, the solenoid that matches with yoke.

Described locating part is a spline, and described spline is provided with the guiding tenon as guiding parts, and described moving sucker is provided with the gathering sill that matches with the guiding tenon of spline.

Described adjusting device comprises the adjustment disk that is provided with the rotating shaft relative fixed and regulates nut; Described adjustment disk is arranged on the outboard end of locating part; Described adjustment disk be provided with and regulate nut matches and screw.

One side of described elastic component is against on the rear end cap of motor body, and another side is against on the thrust bearing.

Clearance distance between described moving sucker and the quiet sucker of electromagnetic type is 0.15mm～1mm.

The quiet sucker of described electromagnetic type outside end face is 1.5mm～3mm with clearance distance between the described locating part inner side end, and outside the quiet sucker of electromagnetic type end face than described locating part inner side end more near the rear end cap of motor body.

Described braking device has protective cover.

Described braking device has the cooling-part that is used to lower the temperature.

Described cooling-part preferably adopts fan.

The utlity model has positive effect:

(1) the utility model is when starting, because the moving sucker in the braking device is not pressed on the quiet sucker, certain interval is arranged between the two, the friction so the utility model does not brake when starting, thus can start the utility model by normal starting current.

(2) the only energising in a flash when needs brakes of the solenoid in the utility model braking device, no power when motor start-up and operation is only switched in brake moment, be a kind ofly have the power consumptive province, stable energy-saving product does not generate heat, brakes.

(3) when the clearance distance between described moving sucker in the utility model and the quiet sucker of electromagnetic type is 0.15mm～1mm, can obtain best skidding effect.

(4) clearance distance between quiet sucker outside end face of the described electromagnetic type in the utility model and described locating part inner side end is 1.5mm～3mm, and the quiet sucker of electromagnetic type outside end face than described locating part inner side end more near the rear end cap of motor body, moving of moving sucker---pushed open by spring and adsorbed and be conditioned device and regulate, can have optimum efficiency by yoke.

(5) the utility model structural design uniqueness, only need be when making common motor, thereafter end cap thickening, rotating shaft extend to stretches out the rear end cap outside, on rear end cap, fix the quiet sucker of electromagnetic type, on axle, set locating part, moving sucker, adjusting device, elastic component, thrust bearing and promptly can be made into the utility model, thereby make and the utlity model has than the advantage that is easier to implement.

Description of drawings

Fig. 1 is a kind of structural representation of the present utility model;

Fig. 2 is the local enlarged diagram at A place among Fig. 1;

Fig. 3 is the structural representation of locating part in the brake motor shown in Figure 1;

Fig. 4 is the electrical schematic diagram of brake motor shown in Figure 1.

Reference numeral is: motor body 1, casing 11, casing rear end lid 12, rotating shaft 13, rotating shaft tail end 131, braking device 2, the quiet sucker 21 of electromagnetic type, yoke 211, solenoid 212, double-screw bolt 213, locating part 22, guiding parts 221, keyway 222, locating part inner side end 223, pin key 224, moving sucker 23, the quiet sucker of electromagnetic type (21) outside end face 233, adjusting device 24, adjustment disk 241 is regulated nut 242, screw 2411, elastic component 25, thrust bearing 26, protective cover 5;

TA, AE, AN are push-button switches, and 1C, 2C are alternating-current controllers, and JR is a thermal relay, and 3C is a solenoid.

Embodiment

(embodiment 1)

Fig. 1 and Fig. 2 disclose embodiment of the present utility model, and wherein Fig. 1 is a kind of structural representation of the present utility model; Fig. 2 is the local enlarged diagram at A place among Fig. 1; Fig. 3 is the structural representation of locating part in the brake motor shown in Figure 1; Fig. 4 is the electrical schematic diagram of brake motor shown in Figure 1.

See Fig. 1 to Fig. 3, present embodiment is a kind of brake motor, comprises motor body 1 and braking device 2; Described motor body 1 has casing 11, rear end cap 12, front end housing (not drawing on the figure), stator (not drawing on the figure), rotating shaft 13 and (not drawing on the figure) and is fixed on rotor in the rotating shaft 13; Described stator, rotor are positioned at the motor body enclosure interior, also are the inboard of the rear end cap 12 of motor body, the tail end 131 of described motor body rotating shaft 13 stretches out the rear end cap 12 of motor body, also promptly be positioned at the outside of rear end cap 12, described braking device 2 also is arranged on the outside of rear end cap 12; Described braking device 2 comprises the quiet sucker 21 of electromagnetic type that is fixedly installed on the casing rear end lid 12, be fixed on the locating part that is provided with guiding parts 221 22 on the rotating shaft tail end 131, can be at the moving sucker 23 that slides on the locating part 22, be used to regulate clearance distance between moving sucker 23 and the quiet sucker 21 of electromagnetic type adjusting device 24, for moving sucker 23 elastic component 25 of reseting elasticity is provided and be arranged on elastic component 25 and moving sucker 23 between thrust bearing 26; Elastic component 25 in the present embodiment is selected the screw thread spring for use.

The quiet sucker 21 of described electromagnetic type comprises that being fixedly installed on casing rear end by double-screw bolt 213 covers the yoke 211 on 12, the solenoid 212 that matches with yoke 211.

Described locating part 22 is splines, and described spline is provided with a plurality of guiding tenons as guiding parts 221, connects the keyway 222 of usefulness with rotating shaft 13; Described moving sucker 23 be provided with match with the guiding tenon of spline with guiding tenon quantity identical interior gathering sill.

Described adjusting device 24 comprises the adjustment disk 241 that is provided with rotating shaft 13 relative fixed and regulates nut 242; Described adjustment disk 241 is arranged on the outboard end of locating part 22; On the described adjustment disk 241 be provided with and regulate nut 242 matches and screw 2411, described adjusting nut 242 is by turn in screw 2411, realization moves forward and backward, thereby can regulate the clearance distance between moving sucker 23 inner side ends 233 and described locating part 22 inner side ends 223.

One side of described elastic component 25 is against on the rear end cap 12 of motor body, and another side is against on the thrust bearing 26.

Clearance distance a between the quiet sucker 21 of described moving sucker 23 and electromagnetic type is 0.25mm, and bigger distance also is fine, but in order to obtain optimum efficiency, is 0.15mm～1.5mm with its distance setting generally.

Clearance distance b between quiet sucker 21 outside end faces 233 of described electromagnetic type and described locating part 22 inner side ends 223 is 2mm, bigger distance also is fine, but in order to obtain optimum efficiency, be 1.5mm～3mm generally with its distance setting, and quiet sucker 21 outside end faces 233 of electromagnetic type than described locating part inner side end 223 more near the rear end cap 12 of motor body.

See Fig. 4, the course of work of present embodiment is: present embodiment is when being in energising rotation work state when motor, electric current passes through from the normally closed interlock of push-button switch TA, also promptly from the control circuit of motor body, flow through, solenoid 3C is in off-position, also be solenoid 212 in the quiet sucker 21 of described electromagnetic type by electric current, moving sucker 23 is pushed open by elastic component 25, thereby can not influence the normal operation of rotating shaft 13; When needs brake, press the button switch TA, in the moment that presses the button switch TA, the normally closed interlock of push-button switch TA disconnects, electric current passes through from the normally open contact of push-button switch, also promptly from solenoid 3C, pass through, and the outage of the control circuit of motor body, thereby in the moment that presses the button switch TA, the solenoid energising produces magnetic field, makes yoke 211 attract moving sucker 23, overcome the reseting elasticity of elastic component 25 and will move sucker 23 and be adsorbed on the yoke 211, produce bigger resistance between moving sucker 23 and the yoke 211, thereby rotating shaft 13 is stopped operating, realize the motor brake.After the motor brake; release button switch TA; solenoid 3C outage; yoke 211 losss of excitation; elastic component 25 will move sucker 23 again and push open from yoke 211, and moving sucker 25 no longer hinders rotating shaft 13 to rotate, and motor again can be to start with the same starting current of motor of common no brake gear; thereby it is less to have starting current, the advantage of protection electric switch.In addition, the operation of present embodiment braking device control also can adopt the controlled sequence controller to come control operation.

(embodiment 2)

Present embodiment is substantially the same manner as Example 1, and difference is: the braking device 2 in the present embodiment also has the cooling-part that is used to lower the temperature with the setting of protective cover relative fixed, and present embodiment selects for use fan as cooling-part.When motor need be at frequently braking the operational environment long-play time, adopt the motor of present embodiment not have the shortcoming that caloric value is excessive, temperature rise is too high.

Obviously, the foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that connotation of the present utility model extends out and still belong to protection range of the present utility model.

Claims

1, a kind of brake motor comprises motor body (1) and braking device (2); Described motor body (1) has casing (11), rear end cap (12) and rotating shaft (13); It is characterized in that: the tail end (131) of described motor body rotating shaft (13) stretches out the rear end cap (12) of motor body, and described braking device (2) is arranged on the outside of rear end cap (12);

Described braking device (2) comprises the quiet sucker of electromagnetic type (21) that is fixedly installed on the casing rear end lid (12), be fixed on the locating part that is provided with guiding parts (221) (22) on the rotating shaft tail end (131), can go up the moving sucker (23) that slides at locating part (22), be used to regulate the adjusting device (24) of clearance distance between moving sucker (23) and the quiet sucker of electromagnetic type (21), the elastic component (25) of reseting elasticity is provided for moving sucker (23), and be arranged on thrust bearing (26) between elastic component (25) and the moving sucker (23).

2, brake motor according to claim 1 is characterized in that: the quiet sucker of described electromagnetic type (21) comprises the yoke (211) that is arranged on the casing rear end lid (12), the solenoid (212) that matches with yoke (211).

3, brake motor according to claim 1 is characterized in that: described locating part (22) is a spline, and described spline is provided with the guiding tenon as guiding parts (221), and described moving sucker (23) is provided with the gathering sill that matches with the guiding tenon of spline.

4, brake motor according to claim 1 is characterized in that: described adjusting device (24) comprises the adjustment disk (241) that is provided with rotating shaft (13) relative fixed and regulates nut (242); Described adjustment disk (241) is arranged on the outboard end of locating part (22); On the described adjustment disk (241) be provided with and regulate nut (242) matches and screw (2411).

5, brake motor according to claim 1 is characterized in that: a side of described elastic component (25) is against on the rear end cap (12) of motor body, and another side is against on the thrust bearing (26).

6, brake motor according to claim 1 is characterized in that: the clearance distance between described moving sucker (23) and the quiet sucker of electromagnetic type (21) is 0.15mm～1.5mm.

7, brake motor according to claim 1, it is characterized in that: the quiet sucker of described electromagnetic type (21) outside end face (233) is 1.5mm～3mm with clearance distance between described locating part (22) inner side end (223), and outside the quiet sucker of electromagnetic type (21) end face (233) than described locating part inner side end (223) more near the rear end cap (12) of motor body.

8, brake motor according to claim 1 is characterized in that: described braking device (2) has protective cover (5).

9, brake motor according to claim 1, it is characterized in that: described braking device has the cooling-part that is used to lower the temperature.

10, brake motor according to claim 9, it is characterized in that: described cooling-part is a fan.