CN2574292Y - Braking device for motor - Google Patents
Braking device for motor Download PDFInfo
- Publication number
- CN2574292Y CN2574292Y CN 02282053 CN02282053U CN2574292Y CN 2574292 Y CN2574292 Y CN 2574292Y CN 02282053 CN02282053 CN 02282053 CN 02282053 U CN02282053 U CN 02282053U CN 2574292 Y CN2574292 Y CN 2574292Y
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- China
- Prior art keywords
- frictional disk
- wedge
- shaped surface
- braking device
- mentioned
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Braking Arrangements (AREA)
Abstract
The utility model provides an improved braking device for a motor. The utility model overcomes the problems having in the clutch braking device of the existing device that the clutch braking device is easy to be damaged, and the input power and the load are lower. The utility model comprises a friction disk (6) provided with an inner sheath (7), wherein, the circumference wall of the inner sheath is provide with a wedge-shaped concave groove; an end ring (13) of a rotor is provided with a corresponding wedge-shaped projection (14), so that the friction disk and the end ring keep a driving relationship; one or multiple braking pads (12) are arranged between the friction disk (6) and an end cover (5) of a housing body of the motor; the friction disk (6) can be arranged on a shaft (3) of the rotor of the motor in a slide mode; the friction disk (6) is pressed towards the braking pads (12) by a pressure spring (11); the other end of the rotor can be simultaneously provided with the other clutch brake, a post pin is embedded in the wedge-shaped concave groove of the inner sheath of the friction disk. The braking device for the motor of the utility model is mainly used for various electric tools, such as a mower.
Description
Technical field
The utility model relates to a kind of brake apparatus of motor, is used for brake rapidly behind the dump of motor, and the rotor of motor is stopped operating at short notice fully.Dynamic braking device of the present utility model is mainly used in each type electric tool, for example hay mover.
Background technology
Some motor, the drive motors of hay mover for example, require behind dump 3-5 in second rotor must stop operating the blade stop motion of hay mover simultaneously, otherwise just do not meet some national technical standard, and become substandard product fully.As everyone knows, motor because the action of inertia rotor will could stop operating fully in half a minute or longer time, so just must be installed clutch-brake in the inside of motor and brake after the outage in the ordinary course of things.
EP 0 136 282 discloses a kind of dynamic braking device, is frictional disk (6) is installed on rotor, and drag ring (12) is equipped with in the inboard of the end cap of electric machine casing (5), spring (11) but clutch ground frictional disk (6) is pressed on the drag ring (12), as shown in Figure 1.When electrical power, stator produces magnetic field, and frictional disk (6) is inhaled to rotor immediately by the resistance that magnetic attraction overcomes spring, thereby frictional disk and drag ring break away from, but the rotor high speed rotating.When motor cuts off the power supply, the magnetic force of stator disappears, frictional disk (6) is pressed on the drag ring (12) of end cap (5) at joint under the effect of spring (11), moment of friction plays braking action, two wedge-shaped impressions that are engaged with on two wedge shape boss that braking force is gone out by frictional disk inside and the rotor end ring (13), be delivered to rotor, the rotor braking is stopped operating.
The shortcoming of this brake apparatus is, wedge shape boss on the frictional disk (6) is easy to distortion owing to be subjected to impact, can very fast wedge shape concave surface on the rotor end ring (13) be broken again after the distortion, the wedge-like portion generation abnormal sound that skids of engagement can not stop the rotation of rotor in the case at 3-5 in second.For avoiding this damage, the size of the mowing cutter of the input power of this device and use must be limited on the lower level, and for example, power is less than 1100W, and tool weight is in 2KG.
The utility model content
The purpose of this utility model provides a kind of dynamic braking device, overcomes above-mentioned defective, even input power and cutter also can normal brake applications.
Above-mentioned purpose is reached by following scheme: a kind of brake apparatus of motor, have a frictional disk, and it is local at least by the soft magnetic material making, and frictional disk inside has wedge-shaped surface; Wedge-shaped surface also is set on the end ring of motor rotor, can keeps with the wedge-shaped surface in the frictional disk being meshing with each other; Brake pad is installed between frictional disk and the electric machine casing end cap; A stage clip is installed between frictional disk and the motor rotor end ring, and frictional disk is slidably mounted on the motor shaft, stage clip is pressed in frictional disk on the brake pad, wherein, the wedge-shaped surface of frictional disk is arranged on the interior perisporium that overlaps and is spill, face toward on the face of frictional disk on the rotor end ring, two wedge shape boss correspondingly are set, this boss has a pair of wedge-shaped surface, above-mentioned each wedge-shaped surface is the plane, and the wedge-shaped surface of frictional disk is identical with the wedge-shaped surface of above-mentioned boss with respect to the gradient of electrical axis.
Wedge shape projection in the frictional disk of prior art is easy to damage under the impact of braking owing to be that punching stretch forms so thinner.The utility model can be formed on the lozenges of frictional disk and put in thicker, and the spill wedge surface on the rotor end ring changes the convex wedge surface into, has improved local mechanical strength, and the durability of parts improves, the also corresponding raising of fail safe.
The motor bigger to power, the blade of drive is long, and moment of inertia will correspondingly increase, and braking time at this moment will be above 5 seconds.Have only corresponding increase moment of friction could guarantee the 3-5 braking effect of second.For this reason, the utility model adopts two frictional disks to brake simultaneously in two ends of rotor, owing to the position that will guarantee frictional disk and friction plate, stator, rotor, distance etc., near the other end of rotor, a pin is installed on the motor shaft substantially mutual vertically, brakes and leads with the boss face that replaces rotor end ring, and another frictional disk is slidably mounted on the motor shaft, stage clip is pressed in frictional disk on the brake pad, and brake pad is installed between frictional disk and the electric machine casing end cap; The cylinder size of above-mentioned pin can embed between the wedge-shaped surface on the frictional disk it.
Cover is fixed on the bottom of frictional disk in the utility model, and connected mode can be riveted joint, welding or other suitable manner.The perisporium of cover has two V-notchs symmetrically in above-mentioned, and wedge-shaped surface is formed at indentation, there.Because wedge-like portion and frictional disk are made respectively, for the intensity that improves wedge-like portion provides design leeway.
According to the utility model, the wedge shape projection of above-mentioned rotor end ring is symmetrical arranged with respect to the rotor axis.And the radial distance of the wedge shape protrusion distance electrical axis on the end ring wedge-shaped surface (8) with above-mentioned frictional disk (6) basically is identical apart from the radial distance of electrical axis.The height of the wedge shape projection on the above-mentioned end ring makes in the V-notch of its interior cover that extend into frictional disk, so that wedge-shaped surface is meshing with each other.
In addition, the pin on the rotor axis of electric can be a straight pin.
Describe the utility model in detail with embodiment with reference to the accompanying drawings.
Description of drawings
Fig. 1 is the structure chart of the dynamic braking device of prior art;
The structure chart of Fig. 2 dynamic braking device of the present utility model;
The schematic perspective view of the rotor of Fig. 3 dynamic braking device of the present utility model;
The schematic perspective view of the frictional disk of Fig. 4 dynamic braking device of the present utility model;
The side sectional view of the frictional disk of Fig. 5 dynamic braking device of the present utility model;
The front view of the frictional disk of Fig. 6 dynamic braking device of the present utility model.
Embodiment
Introduce embodiment of the present utility model below in conjunction with accompanying drawing.
As shown in Figure 2, the brake apparatus of motor of the present utility model comprises a frictional disk (6), and it is local at least by the soft magnetic material making, and frictional disk inside has cover (7) in.There is end ring (13) end of rotor (2), and frictional disk and end ring keep drive connection.One or more brake pads (12) are installed between frictional disk (6) and the electric machine casing end cap (5), for example are installed in the inboard groove of end cap (5).A stage clip (11) is installed between frictional disk (6) and the motor rotor end ring (13), and frictional disk (6) is slidably mounted on the rotor axis of electric (3), and stage clip (11) is pressed in frictional disk (6) on the brake pad (12).
Fig. 2 also shows, right-hand member at rotor, a pin (4) is installed on the machine shaft (3) substantially mutual vertically, another frictional disk (6) is slidably mounted on the motor shaft (3), stage clip (11) is pressed in frictional disk (6) on the brake pad (12), and brake pad (12) is installed between frictional disk (6) and the electric machine casing end cap (5); The cylinder size of above-mentioned pin (4) makes between its wedge-shaped surface that can import frictional disk (6) (8).Promptly replaced two the wedge shape projectioies (14) on the end ring, worked engaging and gearing with pin.
As shown in Figure 3, on the side ring (13) of motor rotor (2), be provided with two wedge shape boss (14), each has two wedge-shaped surface (15).Boss (14) preferably is symmetrical arranged with respect to the rotor axis, and the height of this projection (14) makes in the V-notch of its interior cover (7) that can extend into frictional disk (6) (Fig. 4).Wedge-shaped surface (15) is used for keeping being meshing with each other drive connection with the wedge-shaped surface (8) of the interior cover (7) of frictional disk.Opposite side at rotor, a straight pin (4) is along passing motor shaft (3) with the vertical substantially direction of electrical axis, it is from two ends that motor shaft (3) stretches out, be used for embedding the groove that forms by wedge-shaped surface (8) of frictional disk (6), thereby between rotor (2) and frictional disk (6), set up drive connection.
Shown in Fig. 4-6, the central interior of frictional disk (6) is being fixed cover (7) in, and above-mentioned interior cover (7) is riveted on the bottom of frictional disk (6).The perisporium of cover (7) has two V-notchs symmetrically in above-mentioned, and wedge-shaped surface (8) is formed at indentation, there, forms a Baltimore groove between wedge-shaped surface (8).Among the figure, the wedge-shaped surface of frictional disk (8) is basic identical with respect to the wedge-shaped surface (15) of the gradient of electrical axis and above-mentioned boss (14), and, the wedge-shaped surface (8) with above-mentioned frictional disk (6) is identical apart from the radial distance of electrical axis basically apart from the radial distance of rotor axis for wedge shape projection (14) on the above-mentioned end ring, above-mentioned each wedge-shaped surface is the plane, and this arrangement has guaranteed good contact the between face and the face.
Cover (7) also can be welded on the bottom of frictional disk (6) in above-mentioned.
The course of work of dynamic braking device of the present utility model is as follows, sees also Fig. 2:
When electrical power, stator produces magnetic field, and the frictional disk of being made by soft magnetic material (6) is magnetized, the resistance that magnetic force overcomes spring with frictional disk immediately from drag ring (12) inhale from, and to rotor end ring (13) motion, braking force is removed, but the rotor high speed rotating.When motor cut off the power supply, the magnetic force of stator disappeared, and the magnetic force of frictional disk (6) also disappears thereupon.Under the promotion of spring (11), the frictional disk of high speed rotating (6) is pressed on the brake pad (12) of end cap (5), and moment of friction plays braking action.At an end of rotor (2), the wedge-shaped surface (8) of braking force by cover (7) in the frictional disk is delivered to rotor with the engagement of the wedge-shaped surface (15) of end ring (13), and rotor (2) is braked.The other end in rotor (2), braking force is delivered to rotor by the wedge-shaped surface (8) of cover (7) in the frictional disk and the embedding engagement of pin (4), and rotor (2) is braked.
The execution mode that brake simultaneously at above-mentioned two ends is applicable to the motor that input power is big, live load is heavy.Less for input power, the lighter motor of loading only need be established brake apparatus of the present utility model at an end of rotor, can obtain good braking effect.
According to European Community's new regulation in recent years, all electric tools all must have brake apparatus, and brake time requirement is at 3-5 within second.Dynamic braking device of the present utility model when input power 1300W, cutter 2.97Kg, through 5000 wheels-locked testings, all can inside brake in 4 seconds success, rotation is stopped fully.The security performance excellence, long service life, noise is low, is difficult for causing accident to take place because of parts damage.
Claims (9)
1, a kind of brake apparatus of motor has a frictional disk (6), and it is local at least by the soft magnetic material making, and frictional disk inside has wedge-shaped surface (8); On the end ring (13) of motor rotor (2) wedge-shaped surface is set, keeps being meshing with each other with wedge-shaped surface in the frictional disk; Brake pad (12) is installed between frictional disk (6) and the electric machine casing end cap (5); A stage clip (11) is installed between frictional disk (6) and the electric machine end ring (13), and frictional disk (6) is slidably mounted on the motor shaft (3), stage clip (11) is pressed in frictional disk (6) on the brake pad (12), it is characterized in that: the wedge-shaped surface of frictional disk is arranged on the perisporium of interior cover (7) and is spill, rotor end ring (13) is gone up facing on the face of frictional disk (6) two wedge shape boss (14) correspondingly is set, this boss has a pair of wedge-shaped surface (15), above-mentioned each wedge-shaped surface is the plane, and the wedge-shaped surface of frictional disk is identical with the wedge-shaped surface (15) of above-mentioned boss (14) with respect to the gradient of electrical axis.
2, dynamic braking device as claimed in claim 1, it is characterized in that, near the other end of rotor, a pin (4) is installed on the motor shaft (3) substantially mutual vertically, another frictional disk (6) is slidably mounted on the motor shaft (3), stage clip (11) is pressed in frictional disk (6) on the brake pad (12), and brake pad (12) is installed between frictional disk (6) and the electric machine casing end cap (5); The cylinder size of above-mentioned pin (4) makes between its wedge-shaped surface that can embed frictional disk (6) (8).
3, dynamic braking device as claimed in claim 1 or 2 is characterized in that, above-mentioned interior cover (7) is the bottom that is riveted on frictional disk (6).
4, dynamic braking device as claimed in claim 1 or 2 is characterized in that, above-mentioned interior cover (7) is the bottom that is welded on frictional disk (6).
5, dynamic braking device as claimed in claim 1 or 2 is characterized in that, the perisporium of above-mentioned interior cover (7) has two V-notchs symmetrically, and wedge-shaped surface (8) is formed at indentation, there.
6, dynamic braking device as claimed in claim 1 is characterized in that, the wedge shape projection (14) of above-mentioned rotor end ring (13) is symmetrical arranged with respect to electrical axis.
7, dynamic braking device as claimed in claim 6 is characterized in that, the wedge-shaped surface (8) with above-mentioned frictional disk (6) is identical apart from the radial distance of electrical axis basically apart from the radial distance of electrical axis for the wedge shape projection (14) on the above-mentioned end ring.
8, dynamic braking device as claimed in claim 1 is characterized in that, the height of the projection on the above-mentioned end ring (14) makes in the V-notch of its interior cover (7) that extend into frictional disk (6).
9, dynamic braking device as claimed in claim 1 is characterized in that, above-mentioned pin (4) is a straight pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02282053 CN2574292Y (en) | 2002-10-24 | 2002-10-24 | Braking device for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02282053 CN2574292Y (en) | 2002-10-24 | 2002-10-24 | Braking device for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2574292Y true CN2574292Y (en) | 2003-09-17 |
Family
ID=33744233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02282053 Expired - Fee Related CN2574292Y (en) | 2002-10-24 | 2002-10-24 | Braking device for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2574292Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012019344A1 (en) * | 2010-08-11 | 2012-02-16 | Bosch Power Tools (China) Co., Ltd. | Portable power tool with quick brake assembly |
| CN102819870A (en) * | 2012-08-03 | 2012-12-12 | 无锡市瑞丰精密机电技术有限公司 | Brake structure for entire detection device of taximeter |
| CN104300756A (en) * | 2014-10-28 | 2015-01-21 | 上海德益轻型起重机有限公司 | Electric hoist synchronous motor with double-braking function |
-
2002
- 2002-10-24 CN CN 02282053 patent/CN2574292Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012019344A1 (en) * | 2010-08-11 | 2012-02-16 | Bosch Power Tools (China) Co., Ltd. | Portable power tool with quick brake assembly |
| CN103079772A (en) * | 2010-08-11 | 2013-05-01 | 博世电动工具（中国）有限公司 | Portable power tool with quick brake assembly |
| CN103079772B (en) * | 2010-08-11 | 2015-08-05 | 博世电动工具（中国）有限公司 | There is the portable power tool of fast braking assembly |
| CN102819870A (en) * | 2012-08-03 | 2012-12-12 | 无锡市瑞丰精密机电技术有限公司 | Brake structure for entire detection device of taximeter |
| CN104300756A (en) * | 2014-10-28 | 2015-01-21 | 上海德益轻型起重机有限公司 | Electric hoist synchronous motor with double-braking function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030917 Termination date: 20101024 |