JP3017328U - Electric power drive for revolving objects - Google Patents

Abstract

(57) [Abstract] [Purpose] A power drive device that increases the rotational inertia of a revolving object. [Structure] One fixed part (stator) is fixed on the non-rotating main shaft, one rotating part (rotor) is pivotally installed on the outer periphery of the fixed part, and one electromagnetic field is generated between the fixed part and the rotating part. The swivel component is swiveled, and one coupler is provided on the swivel component at the end of the main shaft to couple the swivel object on the coupler.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a kind of electric power drive device for a swivel object, and more particularly to an electric power drive device for a swivel object, which is suitable for driving a blade of a mower and has an effect of increasing the rotational inertia of the blade.

[0002]

[Prior art]

 The power source applied to the rotation of the blade of the mower is diesel oil or gasoline engine, and as is generally known, the noise generated while the engine is operating is extremely large. For this reason, mowing in the residential area had to be carried out at certain times, and the noise was a pollution to neighboring people.

At present, the only device that replaces an engine-type mower is to directly use a traditional electric motor, mount an electric motor on the mower, and directly connect the rotating shaft of the electric motor to the shaft of the blade. It drives a blade. That is, the rotational torque required by the blade to mow grass comes from the rotary shaft of the traditional electric motor, which is driven by the rotor in the central part of the traditional electric motor. Generally, the rotor has a plurality of sets of coils, and when a current flows through these coils, a large number of corresponding magnets generate an electric field in the motor casing, and the electric field drives the rotor to rotate the rotating shaft. In such a mower, since power is transmitted from a rotating shaft having a finite diameter, there is a problem that inertia generated jointly by the rotating rotor and the rotating shaft is finite.

In addition, another problem occurs when the blade of a mower cuts grass. That is, when contacting grass irregularly, the rotation speed repeatedly decreases, the resistance value of the coil on the rotor rises, and the coil heats up.In a traditional electric motor, it is easy to release the amount of heat generated by the coil. However, if this is directly used as the power of the blade of a mower, the resistance value of the coil increases and the consumption current increases, so it was not suitable to use a battery as a power source. In other words, attempting to power a mower with a traditional electric motor requires a very long power cord, which results in increased mower weight, complicated structure, and inconvenience to use and movement. It was

Another problem is that the high heat generated by the coil is difficult to be released, so that long-term continuous operation cannot be performed.

[0006]

[Problems to be solved by the device]

 An object of the present invention is to provide a kind of electric power drive for a swinging object that consumes less power and is less likely to generate heat, and is particularly applied to drive a blade of a mower.

It is an object of the present invention to provide a kind of electric power drive for revolving objects that does not generate noise, and particularly one that increases the rotating inertia and is applied to a mower to enhance the cutting power of the blade. To do.

[0008]

[Means for Solving the Problems]

 The device of the present invention is one electric power drive device, and includes one main shaft, a fixed part fixed to the main shaft, a turning part that turns on the outer periphery of the fixed part, a turning tool of a mower or another tool. A coupler used for coupling with an object, a plurality of coils having a first part and a second part, and a plurality of permanent magnets between the two parts, and an electric field is generated when the coils acquire an electric current. The first part of the electric field generator is fixed on the fixed part, and the second part is the above-mentioned part. It is fixed on a swivel part, the main shaft is fixed and does not rotate, the connector is connected to the swivel object and pivotally mounted on the main shaft, and when the swivel part swivels, the connector and the swivel object are rotated. Of the revolving object, which increases the inertia of rotation by simultaneously revolving with the above revolving parts. It is a dynamic system.

The revolving object may be a grinding wheel or a circular saw piece.

The fixing part has a body formed of an insulating engineering plastic, the plurality of magnets are coupled to the body and fixed to the outer periphery of the fixing part, and a metal ring is provided on the bottom of each magnet. Is used as a magnetic path.

A single concave tank is provided in the center of the fixed component, and a first blade ring fixed on the main shaft is pivotally mounted on the swivel component, and the first blade ring is a concave portion of the fixed component. It is located in the tank and is fixed to the swivel component to generate centrifugal airflow during swirling.

A conductive ring having a large number of conductive pieces is fixed on the swivel component, each conductive piece of the conductive ring is radially arranged, and the conductive pieces have one outer end and one inner end, The outer end and the coil are connected to each other, and the inner end and the carbon brush are in contact with each other.

The connector of the swivel component has a shaft-shaped head and a plurality of convex edges distributed around the shaft-shaped head, in which a uniaxial hole is provided at the center of the blade or swivel member. The shaft-shaped head of the coupler is fitted therein, and the revolving structure is provided with a plurality of holes along the periphery of the shaft hole for fitting with the convex edge of the coupler.

The swiveling component has a second blade ring for generating a centrifugal airflow in the inner layer of the conductive ring.

The fixing part is provided with a plurality of axial holes radially distributed in the same diameter, and the carbon brush is installed therein.

[0016] The revolving component has magnets of the stationary component and a casing that covers the respective components, and at least one of the casings is on the same center line as the axial holes radially distributed on the stationary component. Two holes are provided and a lid is placed over the holes.

[0017]

[Action]

 The electric power drive of a swivel object provided by the present invention has one shaft that is fixed and does not swivel, one stator is fixed on the shaft, and one stator is pivotally connected by a bearing. An induction electric field device is installed between the outer circumference of the stator and the inner edge of the rotor. Then, a plurality of magnets are installed on the outer circumference of the stator, and a plurality of sets of coils are provided on the inner edge of the rotor, and an electric field is generated between the stator and the rotor by passing a current through the coils. Alternatively, a plurality of sets of coils are provided on the outer circumference of the stator and a current is passed through the coils, and a plurality of magnets are provided on the inner edge of the rotor to generate an electric field with the stator. Both of these two structures are embodiments of the present invention. The rotor in the device of the present invention is linked to a disc-shaped revolving object such as a blade or a grinding wheel of a mower by a connector connected to the front end of the shaft, and the rotor is provided in the outermost layer of the entire device. The rotor rotates together with the coupler and the revolving object, which can increase the inertia during revolving.

The electric power drive of the swivel object provided by the present invention is not only used for driving the blade of a mower, but also other similar swivel objects such as a grinding machine, a grinder, and a circular cutter. It can be used on this and other similar devices to achieve similar effects.

The electric power drive of the swinging object provided by the present invention radiates heat quickly to the coil, and the resistance value passing through the coil does not increase even after long-term work. Therefore, the amount of consumed electricity is low, which allows the battery to be powered. Suitable as a source.

[0020]

【Example】

 The electric power drive of the swivel object of the present invention has one fixed part fixed on the spindle, one swivel part pivoted on the outer periphery of the fixed part, and one electromagnetic field is generated between the fixed part and the swivel part. The swivel component is swiveled, and one connector is provided on the swivel component at the end of the main yuzu, and the swivel object is connected to the coupler.

Shown in FIGS. 1 to 4 is a power drive for a swivel provided by the present invention, which may be mounted on any type of swivel 1. The revolving object 1 is, for example, a grinding wheel, a circular saw piece, a mowing blade of a mower, or the like. The device of the present invention is attached to the connector 2 at the front end of the swivel component 4, and the structure of the connector of the present invention is different due to the difference of the swivel object to be combined. For example, the structure of the connector 2 in the present invention is expressed only when it is attached to the blade of a mower, but when it is attached to other swivel objects, the structure of the connector 2 is also different.

It is well known by the conventional mechanicians that the cutting force of the coupler 2, that is, the acting force of the revolving structure 1 becomes even better when the inertia of the revolving structure increases. The swivel component 4 (ie rotor or rotor) has a greater rotational inertia than traditional power drives.

In the field of kinematics (Elements of Mechanism), there is one formula developed based on the Newtonian motion theorem. That is, it is known that the influencing factor of the linear velocity or the peripheral velocity (periphery speed) of any one turn on the edge of one turning wheel is represented by the following formula 1.

[Equation 1] Among them, Va is the linear velocity rate of the A mass point on the wheel, ω is the angular velocity rate, and Ra is the radius to the center of rotation of the A mass point. From this, it can be seen that the size of the radius of the mass A affects the peripheral speed ratio, and also affects the rotational inertia of the revolving object, and the peripheral speed ratio increases as the radius increases.

The present invention drives the coupler 2 by the swivel component 4, and the common mass radius of the swivel component 4 and the coupler 2 is the common mass point of the shaft of the traditional electric motor and the rotor fixed on the shaft. It can be seen that it is larger than the radius and therefore has a greater rotational inertia than traditional power drives.

The electric field generator of the present invention has a first part and a second part, and a coil set and a magnet set are provided between the first part and the second part to generate an electric field. Also, that is, a plurality of radial permanent magnets arranged on the same circumference as a plurality of radially distributed coils, in which an electric field is generated when the coil acquires a current. The first part of the electric field generator is fixed to the outer periphery of the fixed part (stator or stator), and the second part is fixed to the inner edge of the turning part.

In the second embodiment (FIG. 4) of the following examples, the first part of the electric field generator has a plurality of coils, and the second part of the electric field generator has a plurality of permanent magnets. . In another embodiment (FIGS. 1 to 3), the first part of the electric field generator is formed by a plurality of permanent magnets and the second part is formed by a plurality of coils.

Hereinafter, the structure of the present invention will be described with reference to two embodiments. As shown in FIGS. 1 to 3, the first type of device provided by the present invention includes an annular fixed part 5 on a non-rotating main shaft 3 and a plurality of magnets 51 arranged around the fixed part 5. A rotating part 4 pivotally mounted on the main shaft 3 by a bearing 7, a part of which is annularly extended around the outer periphery of the fixed part 5 and a plurality of sets of coils 41 are provided on the inner edge of the extended part. Have. When the coil 41 obtains an electric current, an electric field is generated with the magnet 51 to drive the turning component 4. The invention further comprises a power supply component 6 which supplies a current to the coil 41 of the swivel component 4 by means of a carbon brush assembly 61. A part of the swivel component 4 described above is extended to the front end of the main shaft 3 to form the coupler 2, which is used for mounting the disc-shaped swivel body 1. The coupler 2 in FIGS. 1 and 4 is both pivotally mounted on the main shaft 3 by a magnet 51, and substantially rotates together with the revolving component 4 as one body.

The fixed part 5 is preferably made of an insulating engineering plastic as a main body, and a plurality of magnets 51 are directly coupled to each other when the main body is processed and fixed around the fixed part 5. As shown in FIG. 2, the above-mentioned main body has one metal ring 52 at the bottom of each magnet 51 to form a magnetic path.

A concave tub 53 is provided in the center of the fixed part 5, and the swivel part 4 has a first blade ring 42 pivotally mounted on the main shaft 3, which is shown in FIG. As described above, the carbon brush assembly 61 is located in the inner layer in the radial direction and is located in the concave tank 53 and is fixed to the swivel component 4 to generate a centrifugal airflow during swirling. The air flow promotes heat dissipation of the carbon brush assembly 61 and the electrically-conductive components of the carbon brush assembly 61 and the scattering of carbon powder, and helps suppress heat generation during long-term operation. That is, the electric resistance value is kept stable because the temperature of the electrically conductive parts does not rise high, and the amount of electricity consumed during long-term operation is reduced.

The turning component 4 is fixed to a conductive ring 44 having a plurality of conductive pieces 43, as shown in FIG. The conductive pieces 43 of the conductive ring 44 are radially arranged and each have one outer end 431 and one inner end 432, and each outer end 431 and the coil 41 are connected (as shown in FIG. 1), and the inner end is formed. The side surface of 432 contacts the carbon brush set 61. As shown in FIGS. 1 and 3, a second vane wheel 45 may be additionally provided in the inner layer of the conductive ring 44 in the swivel component 4, which promotes the generation of centrifugal airflow and heat dissipation of the conductive ring 44. . As shown in FIG. 1, the swivel component 4 includes a coil 41, a conductive ring 44, a first vane ring 42, a second vane ring 45, a magnet 51 of a fixed component 5, and a power feeding component 6. Has a ring 46. The fixed part 5 is provided with a plurality of axially-oriented holes 54 radially distributed on the circumferential line of the same diameter and substantially parallel to the main shaft 3, and is used for setting the carbon brush assembly 61. In addition, at least one hole 47 having the same center line as the axial hole 54 is provided on the casing 46, and one lid 48 is provided on the hole 47. Desirably, the number of the holes 47 and the number of the axial holes 54 of the fixed component 5 are made to match, and the lid 48 on the holes 47 is opened for replacement of the carbon brush set 61.

When the connector 2 is attached to the revolving object 1 (blade) of the mower, as shown in FIGS. 1 and 4, the uniaxial head 21 and a plurality of the spun heads 21 are distributed around the uniaxial head 21. The convex edge 22 is included. The shaft-shaped head 21 is fitted in the shaft hole of the revolving object 1 (blade), and the revolving object 1 (blade) is fixed on the shaft-shaped head 21 by a nut 24. The convex edge 22 is fitted in a concave tank or hole 11 provided on the revolving object 1 (blade) and is used to forcibly rotate the axial head 21 together when the revolving object 1 (blade) rotates. .

When a current is supplied by the electric wire of the power supplying component 6, the current is transmitted to the conductive ring 44 via the carbon brush assembly 61, the coil 41 acquires the current, and then the magnet 51 and the electric field on the outer periphery of the fixed component 5 are supplied. Is generated, and the revolving part 4, the coupler 2 and the revolving object 1 such as a blade are driven to revolve.

The second type of embodiment is as shown in FIG. The difference between this example and the first example shown in FIG. 1 is that the magnets 51 and the metal rings 52 in this example are radially arranged and distributed at the inner edge of the swivel component 4, and the coils 41 are relatively arranged. Is distributed on the outer periphery of the fixed part 5. At this time, the power supply component does not have to be a carbon brush assembly or a conductive ring, but an electric wire may be used to directly apply a current to each coil on the outer periphery of the fixed component. Naturally, the supplied current goes through the electronic rectifier 62 or other parts having the same effect to smoothly generate an electric field between the coil and the magnet to rotate the turning part 4. The structure and operation of the other parts of the second embodiment are the same as those of the first embodiment.

[0034]

[Effect of device]

 The device of the present invention swivels the swivel part around the fixed part by changing the magnetic field lines of the electric field, and simultaneously rotates the swivel part together with the coupler to swivel the blade or similar swivel object at the front end of the coupler. Is. Since the swivel part of the present invention has a larger radius mass than the swivel part of a traditional electric motor, it has a larger rotary inertia for use in traditional mowers or similar devices, and is comparable during swivel. Generates a large airflow to promote heat dissipation, which prevents the rise of the working temperature of the coil and the power supply parts, and therefore the electric resistance value does not increase, and it has a power saving effect. It is possible to work for a longer period of time.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a sectional view of a second embodiment of the present invention.

[Explanation of symbols]

1 ... Revolving object 2 ... Coupler 3 ... Spindle 4.
..Swivel parts 41 ... Coil 42 ... First impeller 43 ...
Conductive piece 431 ... Outer end 432 ... Inner end 44 ... Conductive ring 45 ... Second impeller 46 ... Casing 47
... Hole 48 ... Lid 5 ... Fixed part 51 ... Magnet 5
2 ... Metal ring 53 ... Recessed tank 54 ... Axial hole 6 ... Power supply component 61 ... Carbon brush assembly 62 ... Electronic rectifier 7,
71 ... Bearing

Claims (9)

[Scope of utility model registration request] 1. A one-power drive device comprising: a main shaft; a fixed part fixed to the main shaft; a turning part that turns on the outer periphery of the fixing part; and a turning item of a blade or other tool of a mower. A coupler used for coupling, a plurality of coils having a first portion and a second portion, and a plurality of permanent magnets provided between the two portions, and an electric field is generated when the coils acquire an electric current. An electric field generating device in which the first part and the second part perform relative swirling motion, the first part of the electric field generating device is fixed on the fixed part, and the second part is on the swivel part. Fixed, the main shaft is fixed and does not rotate, the coupler is pivotally mounted on the main shaft by being coupled to the revolving object, and when the revolving part pivots, the connector and the revolving object rotate together. An electric power drive for a revolving object that turns with the components and increases the rotational inertia. 2. The power drive device for a revolving object according to claim 1, wherein the revolving object is a grinding wheel or a circular saw piece. 3. The fixing part has a body formed of an insulating engineering plastic, the plurality of magnets are coupled to the body and fixed to an outer periphery of the fixing part, and one magnet ring is provided at a bottom of each magnet. The electric power drive unit for a revolving object according to claim 1, wherein the electric power drive unit is a magnetic path. 4. A one-cavity tank is provided in the center of the fixed part, and a first blade ring fixed on the main shaft is pivotally mounted on the swivel part, and the first blade ring is fixed to the fixed part. The electric power driving apparatus for a revolving object according to claim 1, wherein the electric power driving apparatus is positioned in the concave tank and is fixed to the revolving component to generate a centrifugal airflow during revolving. 5. A conductive ring having a large number of conductive pieces is fixed on the swivel component, and the conductive pieces of the conductive ring are radially arranged, the conductive pieces having one outer end and one inner end. The electric power driving apparatus according to claim 1, wherein the outer end is connected to the coil, and the inner end is contacted with the carbon brush. 6. The connector of the swivel component has an axial head and a plurality of convex edges distributed around the axial head, in which a uniaxial hole is provided at the center of the blade or swivel object. The axial head of the coupler is fitted to the swivel body, and the revolving structure is provided with a plurality of holes along the circumference of the axial hole for fitting with the convex edge of the coupler. Electric power drive for revolving objects. 7. The electric power driving apparatus for a revolving object according to claim 5, wherein the revolving component has a second blade ring for generating a centrifugal air flow in an inner layer of the conductive ring. 8. The electric power drive for a revolving object according to claim 1, wherein the fixed part is provided with a plurality of axial holes radially distributed in the same diameter, and the carbon brushes are installed therein. 9. The swivel component has a casing for covering each magnet and each component of the fixed component, and at least on the casing is at the same center line as the axial holes radially distributed on the fixed component. The electric power driving apparatus for a revolving object according to claim 8, wherein one hole is provided and a lid is put on the hole.