CN200983533Y - Electromotor with braking device - Google Patents

Abstract

A motor with a braking device is composed of a stator winding, a rotor, and an end cover. A friction disc, an iron absorption, a spring and a friction chip are arranged in the motor, wherein the friction disc is stamped by a steel plate, an out-convex slant rushes out from the plate, with a wedge-shaped block on the aluminum ring rotor of the aluminum motor, the angle of the wedge-shaped block made of aluminum and that of the out-convex slant of the friction disc are mostly the same, the friction disc is connected to the magnet, which is made of soft magnetic materials, the device is characterized in that the heat dissipation (H) space between the friction disc and the magnet is large, which is substantially used in various electric garden tools, such as mowers, stem mills and the like.

Description

The motor of band brake device

Technical field

The utility model relates to motor, and particularly the motor of band brake device is braked rapidly behind the dump of motor, and the rotor of motor is stopped operating at short notice fully.The motor of band brake device of the present utility model is mainly used in all kinds of gardens electric tool, hay mover for example, branch crushing machine.

Background technology

Usually after the motor outage, because the effect of inertia motor need continue to rotate a period of time, as garden instruments such as hay movers, must stall in very short time, otherwise may make the operator bring injury, so brake all is housed in this motor to be braked, as EP0136282, each discloses a kind of motor of band brake device CN2574292Y, frictional disk is installed on rotor, and friction plate is equipped with in the inboard of the end cap of electric machine casing, but spring clutch ground is pressed in frictional disk on the friction plate, when electrical power, produce magnetic field, frictional disk is inhaled to rotor by the resistance that magnetic attraction overcomes spring, thereby frictional disk and friction plate break away from, and frictional disk and rotor rotate together.When motor cut off the power supply, magnetic force disappeared, and frictional disk produces braking force with friction plate under spring action, and braking force is delivered to rotor by the wedge shape male and fomale(M﹠F) and makes motor braking.

CN1510817A, CN1510818A are divided into magnetic guiding loop and two parts of brake body to grinding disk,

The shortcoming of these several brake apparatus is frictional disks, magnetic guiding loop covers on rotor aluminium ring cylindrical, cause motor radiating bad, and because the restriction of rotor aluminium ring excircle dimension, dish can only create friction with very thin soft magnetic material, so the magnetic field that is produced during electrical power is also less to the suction of grinding disk, so can only be with less spring, make braking force also less, be generally used for low-power machine, if more powerful motor needs two to load onto frictional disk, also have for grinding disk certain thickness is arranged, for a short time be directed at rotor aluminium loop resistance and become big and rotor aluminium ring changed, influence motor performance.

Summary of the invention

The purpose of this utility model is in order to overcome the shortcoming of prior art, a kind of perfect heat-dissipating to be provided, and rotor aluminium ring excircle dimension is not subjected to brake body restriction, the motor of band brake device.

The technical scheme of the motor of the utility model band brake device is: the motor of being made up of stator winding, rotor, end cap etc., the brake apparatus of forming by grinding disk, suction iron, spring and wearing piece in the motor, it is characterized in that grinding disk can strike out the inclined-plane lug by non-soft magnetic material, the quantity of inclined-plane lug is 3 to 6 usually; Be shaped on the inclined-plane wedge on the rotor aluminium ring of cast aluminium, the angle of the angle of the inclined-plane wedge of cast aluminium and the inclined-plane lug of grinding disk is basic identical, grinding disk connects inhales iron, inhale iron by the soft magnetic material manufacturing, inhale the inboard of iron at rotor aluminium ring, suction iron is inhaled behind the electrical power can not influence the rotor heat radiation yet on the rotor silicon steel sheet, grinding disk can be made into plate shaped, leave open bigger axial heat-dissipating space between grinding disk and the rotor silicon steel sheet, under the situation that does not influence heat-dissipating space, grinding disk can strike out basin shape.

The motor of the utility model band brake device, suction iron are the sheet iron drawings by soft magnetism; Inhale iron one end and have protruding rafter, the contact area of inhaling iron and rotor silicon steel sheet is increased, there is bigger suction in the magnetic field that the energising back produces to inhaling iron.

The motor of the utility model band brake device, cast aluminium inclined-plane wedge outer rim extends to rotor fan, and the rotor heat dispersion is further improved.

The motor of the utility model band brake device, the motor housing of steel plate drawing, can make the seat of electric motor end cap and installation wearing piece be made into two parts, steel plate stretching end cap and steel plate are made the friction bar or plastics are made the friction bar, the friction bar of making has better manufacturability separately, can process the depression of placing wearing piece easily, the quantity of wearing piece is three circumference uniform distributions, it is steadily even to help friction, and steel plate friction bar and end cap are connected with methods such as tenon or screw, riveted joint, welding.

The motor of the utility model band brake device, grinding disk can and can carry out heat and get reason raising grinding disk intensity with non-soft magnetic material such as carbon steel or steel alloy; Owing to inhale the flange and the rotor silicon steel sheet of iron bigger contact-making surface is arranged, the suction that is produced behind the electrical power is also bigger, can select thicker spring for use, to improve stopping power; Solved in the prior art that grinding disk is local at least to be made by soft magnetic material, and cover aluminium ring cylindrical, cause air seal influence heat radiation, and the grinding disk of plate shaped or basin shape does not influence the diameter dimension of aluminium ring, it is little to solve aluminium ring car effectively, be directed at rotor aluminium loop resistance and become big, influence motor performance; The motor of the disclosed a kind of band brake device of contrast CN2574292Y, the wedge-shaped surface of described attrition surface and braking is respectively on grinding disk and two parts of interior cover, when braking, can cause bigger impact torsion, because the attrition surface of the utility model grinding disk and inclined-plane lug be all on same part, so grinding disk and bigger impact torsion does not take place when inhaling between the iron braking.

Description of drawings

Fig. 1 is the electric motor structure schematic diagram of the utility model band brake device;

Fig. 2 is the suction iron of motor of the utility model band brake device and the grinding disk combination assumption diagram of basin shape;

Fig. 3 is the suction iron and the grinding disk combination shaft side figure of the motor of the utility model band brake device;

Fig. 4 is the rotor shaft side figure that the motor of the utility model band brake device has wedge and fan;

Fig. 5 is the rotor end-face view of the motor of the utility model band brake device;

Fig. 6 is the rotor structure schematic diagram of the motor of the utility model band brake device;

Fig. 7 is the hay mover motor structure chart that a kind of outer cover of steel plate of the motor of the utility model band brake device has brake mechanism;

Fig. 8 is that the plastics friction bar axle of the motor of the utility model band brake device is surveyed schematic diagram;

Fig. 9 is a kind of friction bar shaft side figure of steel plate drawing of the motor of the utility model band brake device;

Figure 10 is the hay mover motor partial structurtes schematic diagram that the motor of the utility model band brake device has the bar that rubs;

Embodiment

Shown in Fig. 1-5, be by stator (13), rotor (7), with compositions such as casting end cap (2) and brake apparatus, brake apparatus is by grinding disk (4), spring (6) and wearing piece compositions such as (3), grinding disk is gone out inclined-plane wedge shaped lug (8), be shaped on inclined-plane wedge (10) on the rotor of cast aluminium (7) the aluminium ring, the inclined-plane lug (8) of the angle of inclined-plane wedge (10) and grinding disk (4) matches, grinding disk (4) connects inhales iron (5), inhaling iron (5) is to be stamped to form by the soft magnetism low-carbon steel material, periphery has protruding rafter (9) with the contact-making surface of increase with the rotor silicon steel sheet, anti-hole of the other end and frictional disk (4) snap together, spring (6) is placed on to inhale to it is characterized in that inhaling in the iron (5) open heat-dissipating space (H) between iron and the grinding disk, do not influence the diameter dimension of rotor aluminium ring.

When electrical power produces magnetic field, making and inhale iron (5) drive grinding disk (4) suction from wearing piece (3). grinding disk (4) and rotor rotate together, during power failure because magnetic field disappears, grinding disk under spring action (4) produces frictional force with wearing piece (3) binding face, under the effect of the inclined-plane wedge (10) of inclined-plane lug (8) and cast aluminium, make tighter that grinding disk (4) and wearing piece (3) press, make the quick stall of motor.

As Fig. 4, shown in Figure 5, inclined-plane lozenges (10) the cylindrical extend radially of rotor aluminium ring becomes fan, makes the radiating effect of rotor (7) better.

The grinding disk (4) of the motor of the utility model band brake device can be made into plate shaped, also can strike out basin shape such as Fig. 2, Fig. 3, grinding disk (4) can be selected the higher carbon steel of intensity for use by non-soft magnetic material, alloy steel material, and can heat-treat, owing to inhale the flange (9) and the rotor silicon steel sheet of iron bigger contact-making surface is arranged, the suction that is produced behind the electrical power is also bigger, can select thicker spring (6) for use, to improve stopping power, and solved that grinding disk in the prior art (4) is local at least to be made by soft magnetic material, and cover aluminium ring cylindrical, cause air seal influence heat radiation, and the grinding disk (4) of plate shaped or basin shape do not influence the diameter dimension of aluminium ring, it is little to solve aluminium ring car effectively, be directed at rotor aluminium loop resistance and fall greatly, influence the technical problem of motor performance.

Shown in Fig. 7-10, the seat of the shell of steel plate drawing and installation wearing piece is made into two parts, friction bar (16) made by steel plate stretching end cap (17) and steel plate or plastics are made friction bar (18), the friction bar of making has better manufacturability separately, can process the depression of placing wearing piece easily, the quantity of wearing piece is three circumference uniform distributions, and it is steadily even to help friction, steel plate friction bar and end cap feather joint.

Claims (7)

1, the motor of band brake device, by stator (13) winding (12), rotor (7), end cap (2) is formed motor, grinding disk (4) is arranged in the motor, inhale iron (5), the brake apparatus that spring (6) and wearing piece (3) are formed, grinding disk (4) is by the steel plate drawing, go out inclined convex sheet (8) on its plane, be shaped on inclined-plane wedge (10) on the rotor aluminium ring of cast aluminium, the angle of the angle of the inclined-plane wedge (10) of cast aluminium and the inclined-plane lug (8) of grinding disk is basic identical, grinding disk (4) connects inhales iron (5), inhaling iron (5) is to be made by soft magnetic material, and it is characterized in that inhaling has open heat-dissipating space (H) between iron and the grinding disk.

2, the motor of band brake device as claimed in claim 1 is characterized in that an end of inhaling the close rotor of iron (5) has protruding rafter (9).

3, the motor of band brake device as claimed in claim 1 is characterized in that inhaling iron (5) and grinding disk (4) snaps together.

4, the motor of band brake device as claimed in claim 1, it is characterized in that inhaling iron (5) is by the low carbon steel plate drawing.

5, the motor of band brake device as claimed in claim 1 is characterized in that it is rotor fan (11) that cast aluminium inclined-plane wedge (10) outer rim is radially extended long.

6, the motor of band brake device as claimed in claim 1 is characterized in that wearing piece (3) seat has three depressions (20) of placing wearing piece (3), is placed with a wearing piece in each depression.

7, the motor of band brake device as claimed in claim 1 is characterized in that grinding disk (4) is a basin shape.

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