JP2012500123A - New electric grinder - Google Patents

Abstract

  A housing (1), an output shaft (2) rotatably fixed in the housing and having a first end (21) and a second end (22), and a drive shaft (3 And a planetary gear mechanism that is located in the housing and meshes with the housing, and the drive shaft drives the rotation of the output shaft. Connected to the first end via a mechanism, more preferably the planetary gear mechanism comprises a gear bearing (4), idler teeth (5), and a gear pin (6), the gear bearing via the gear pin. The idler teeth mesh with the housing and the drive shaft, respectively, and the gear bearing is connected to the first end of the output shaft.

Description

  The present invention relates to the technical field of electric tools, and more particularly to the technical field of electric grinders, and more particularly, to a new electric grinder that employs transmission by a planetary gear.

  This type of traditional electric grinder operation system is configured so that the rotational movement of the electric machine reaches the output shaft through a shaft coupling (coupling), and a flower type chuck is mounted on the output shaft and polishing is performed. The head is attached to this flower type chuck. As a result, the polishing head rotates as the electric machine rotates. Furthermore, the rotation speed and rotation direction of the electric machine and the rotation speed and rotation direction of the polishing head completely coincide with each other, and the grinding (abrasion) moment rotates the output shaft through the shaft coupling by the main shaft of the single-phase series winding motor. To get directly.

  As described above, the structure in which the polishing head is directly rotated using the armature (electric shaft) not only has a high rotation speed (28000 to 32000 r / min), but also vibration and noise are very large, and polishing and polishing are consumed. It is not advantageous in terms of the service life of the material, and greatly affects the service life of the electric machine. In addition, the operation is inconvenient, especially when a low rotational speed is required, the electronic speed control mechanism can only be used to adjust the rotational speed, which not only increases the temperature, but also affects the torque (rotational moment). In addition, it is not economical.

  For this reason, it is necessary to improve the structure of the conventional electric grinder, to make the operation convenient, to reduce the vibration and noise, to increase the stability of the whole apparatus, and to extend the service life of the electric machine.

  The object of the present invention is to solve the above-mentioned drawbacks of the prior art, can be used conveniently, vibration and noise are greatly reduced, the stability of the entire device is increased, the service life of the electric machine, especially consumables It is an object of the present invention to provide a new electric grinder that has a long service life and is compact in structure.

In order to achieve the above object, a new electric grinder according to the present invention has the following configuration:
A new electric grinder comprising a housing, an output shaft that is rotatably fixed in the housing and has a first end and a second end, and a drive mechanism that is fixed to the housing and has a drive shaft Further includes a planetary gear mechanism that is located in the housing and meshes with the housing, and the drive shaft is connected to the first via the planetary gear mechanism so as to drive rotation of the output shaft. The planetary gear mechanism includes a gear bearing, an idler tooth, and a gear pin. The gear bearing is connected to the idler tooth via the gear pin, and the idler tooth is connected to the housing and the drive. The gear bearing is engaged with each of the shafts, and the gear bearing is connected to the first end portion.

  Preferably, a first outer spline is provided at the first end, a first inner spline is provided at the gear bearing, and the first outer spline meshes with the first inner spline. To do.

  Preferably, a second outer spline is provided on the drive shaft, and the drive shaft is configured to mesh with the idler teeth via the second outer spline.

  Preferably, the drive shaft is configured to be located in the gear bearing.

  Preferably, the apparatus further includes a chuck and a chuck nut polishing head, the second end includes an inner hole and a male screw, the chuck is located inside the inner hole, and the chuck nut is attached to the male screw. The position of the chuck is limited to the inside of the inner hole by meshing.

  Preferably, further comprising a collar, and a first bearing and a second bearing fixed in parallel to the housing and provided in parallel, wherein the output shaft includes the first bearing and the second bearing. The collar is provided to penetrate the bearing and is fixed to the first bearing and the second bearing, and the collar is attached to the output shaft so as to regulate the positions of the first bearing and the second bearing. The configuration is fixed.

  Preferably, the structure further includes an inner ring gear fixed in the housing, and the planetary gear mechanism meshes with the inner ring gear and indirectly meshes with the housing via the inner ring gear. And

  Preferably, the drive mechanism is an electric machine, and the electric machine includes a casing, a brush mechanism, a stator, and a rotor, the casing is fixed to the housing, the stator is fixed in the casing, and the drive shaft is The rotor is located in the stator and is rotatably fixed in the housing, and the brush mechanism is located in the casing and is electrically connected to the rotor.

  More preferably, the brush mechanism includes a brush, a brush copper spring, a brush cap, a brush knob, and a brush knob copper inner lining, the brush knob being fixed in the casing and positioned in the brush cap, A brush knob copper inner lining is located in the brush knob and is electrically connected to the rotor through the brush knob, and the brush and the brush copper spring are located in the brush knob copper inner lining, and the brush Both ends of the copper spring are in contact with each of the brush and the brush cap.

  Preferably, the drive shaft and the output shaft operate in a state of being arranged in a straight line.

  Preferably, the rotational speed of the output shaft is 600 to 10000 r / min.

  More preferably, the rotational speed of the output shaft is 6000 to 8000 r / min.

  Preferably, the output shaft torque is increased 10 to 100 times under the condition of equivalent input power.

The advantageous effects of the present invention are specifically as follows:
1. The present invention has a configuration in which the drive mechanism and the output shaft are connected via the planetary gear mechanism, so that it is necessary to use a similar electric machine by changing only the planetary gear mechanism as compared with the conventional configuration. Speed and direction of rotation can be obtained. Therefore, the rotational speed can be reduced (600 to 10000 r / min, 6000 to 8000 r / min in the normal optimum state), and the output torque is increased, and the torque of the output shaft is reduced under the condition of equivalent input power. It can be increased 10 to 100 times. As a result, many standards of consumables can be used, vibration and noise can be greatly reduced, the stability of the entire apparatus can be increased, and the service life of the electric machine, in particular, the service life of the consumables can be extended. Since the use of consumable materials generally requires a rotational speed of 3000 to 10000 r / min, it is possible to prevent the temperature of the object to be polished from becoming too high during the polishing process. Therefore, the present invention can be applied to many fields such as polishing, polishing, and grinding (shaving).

2. The outer conical surface of the spring chuck of the present invention and the inner conical hole (inner conical hole) of the output shaft cooperate to provide a function of using the increased driving force and conversion driving force as a work clamping force, A minimum moment of inertia can be obtained during the operation.

3. Since the drive shaft and the output shaft of the present invention operate in a state of being arranged in a straight line, the volume of the airframe can be reduced, the visual effect is excellent, and the operability is excellent. The collar provided on the output shaft prevents the shaft of the gear bearing from moving and improves the operability (operability).

4). The brush knob copper inner lining of the present invention contacts the brush and rotor and conducts them, thus avoiding the life-related effects of traditional conductors on the brush. In addition, the use of the brush knob copper inner lining can delay the deformation of the brush knob due to the excessive brush temperature, so that the influence on the free expansion and contraction of the brush can be avoided.

It is a partial cross section figure based on one specific Example of the new type electric grinder of this invention. It is a partial cross section sketch of the assembly structure of a chuck, a chuck nut, an output shaft, a first bearing, a second bearing, and a collar according to a specific example of the new type electric grinder of the present invention. It is a partial structure sketch of the rotor which concerns on one specific Example of the new type electric grinder of this invention. It is a cross-sectional sketch of the brush mechanism which concerns on one specific Example of the new type electric grinder of this invention. It is another partial cross-sectional sketch based on one specific Example of the new type electric grinder of this invention. It is another partial cross-sectional sketch based on one specific Example of the new type electric grinder of this invention. It is a front sketch of the head cover which concerns on one specific Example of the new type electric grinder of this invention.

In order that the technical contents of the present invention can be understood more clearly, the following examples will be given in detail.
As shown in FIGS. 1 to 7, the new electric grinder according to the present invention has a housing 1 and a first end 21 and a second end 22 that are rotatably fixed in the housing 1. An output shaft 2 and a drive mechanism fixed to the housing and having a drive shaft 3 are provided. The present invention further includes a planetary gear (planetary gear) mechanism that is located in the housing 1 and meshes with the housing 1, and the drive shaft 3 has the planetary gear mechanism so as to drive the rotation of the output shaft 2. Via the first end 21.

  The planetary gear mechanism includes a gear bearing 4, an idler tooth (idler gear) 5, and a gear pin 6. The gear bearing 4 is connected to the idler tooth 5 via the gear pin 6, and the idler tooth 5 is a housing. 1 and the drive shaft 3 are engaged with each other, and the gear bearing 4 is connected to the first end 21.

  In a specific embodiment of the present invention, the first end 21 is provided with a first outer spline (external spline), and the gear bearing 4 is provided with a first inner spline (internal spline). One outer spline meshes with the first inner spline.

  In a specific embodiment of the present invention, the drive shaft 3 is provided with a second outer spline, and the drive shaft 3 meshes with the idler teeth 5 via the second outer spline.

  In one embodiment of the invention, the drive shaft 3 is located in the gear bearing 4.

  Preferably, the chuck 7 and the chuck nut polishing head 8 are further provided, the second end 22 is provided with an inner hole (inner hole) and a male screw, the chuck 7 is located inside the inner hole, and the chuck nut 8 is provided. Engages with the male screw to limit the position of the chuck 7 to the inside of the inner hole. In one specific embodiment of the present invention, the chuck 7 is a spring chuck, and the outer cone surface and the inner cone hole (inner cone hole) of the output shaft 2 cooperate to increase the driving force and the conversion driving force. In addition to having the function of workpiece clamping force, it obtains the minimum moment of inertia when the equipment is operating.

  In a specific embodiment of the present invention, a collar 9 and a first bearing 10 and a second bearing 11 which are fixed in the housing 1 and provided in parallel are further provided. The output shaft 2 is provided so as to penetrate (pierce) the first bearing 10 and the second bearing 11, and is fixed to the first bearing 10 and the second bearing 11, and the collar 9 is The first bearing 10 and the second bearing 11 are fixed to the output shaft 2 so as to regulate (spacing) the positions of the first bearing 10 and the second bearing 11. The output shaft 2 cannot move in the axial direction, but rotates rapidly.

  Preferably, an inner ring gear (internal tooth ring gear) 12 fixed in the housing 1 is further provided, and the planetary gear mechanism meshes with the inner ring gear 12 and indirectly through the inner ring gear 12. Meshes with the housing 1. In one specific embodiment of the present invention, the idler teeth 5 of the planetary gear mechanism mesh with the inner ring gear 12 and are positioned in the locking groove of the housing 1, and can move in the axial direction within a narrow range. Rotate, agile.

  Preferably, the drive mechanism is an electric machine, and the electric machine includes a casing 13, a brush mechanism 14, a stator 15, and a rotor. The casing 13 is fixed to the housing 1, the stator 15 is fixed to the casing 13, and the drive shaft 3 is located in the stator 15 and is the rotor fixed to the housing 1 so as to be rotatable. The brush mechanism 14 is located in the casing 13 and is electrically connected to the rotor. In one embodiment of the invention, the stator 15 is fixed on the rack 13 and cannot move axially or rotate. The rotor is located in the gear bearing 4 and meshes with the idler teeth 5, and is further fixed to the rack 13 via a rolling bearing provided in the upper part. The rack 13 is fixed to the housing 1. For this reason, the rotor cannot move in the axial direction, but rotates rapidly and is indirectly fixed to the housing 1.

  In one specific embodiment of the present invention, the brush mechanism 14 includes a brush 16, a brush copper spring (copper brush spring) 17, a brush cap 18, a brush knob 19, and a brush knob copper inner lining (copper brush knob inner lining) 20. . The brush knob 19 is fixed in the casing 13 and positioned in the brush cap 18, and the brush knob copper inner lining 20 is positioned in the brush knob 19 and penetrates (pierces) the brush knob 19. The brush 16 and the brush copper spring 17 are electrically connected to the rotor and are located in the brush knob copper inner lining 20, and both ends of the brush copper spring 17 abut against the brush 16 and the brush cap 18, respectively.

  In one embodiment of the present invention, the wire plug spring 23 and the switch 24 are used to quickly connect to the power source, and the switch 24 can efficiently control the device state.

  In a specific embodiment of the present invention, a rubber bearing bush 30, a cross-headed pan head tapping screw 25, a closed end terminal 26, a wire holding plate 27, a cable sheath 28, and a power line 29 are further provided. The bearing bush 30 is used for vibration isolation of the airframe. The pan-head tapping screw 25 with a cross hole is a standard of ST4X16 and is used for fastening. The closed terminal 26 is used for quick connection and insulation. The power line 29 is protected and fixed to the wire holding plate 27 and is further protected by the cable sheath 28, so that the machine body can be insulated and operated safely.

  In one embodiment of the present invention, the stopper pin 32 and the stopper spring 33 are used for quick attachment, and the unloader polishing head and the head cover 34 have a protective and aesthetic effect.

  In the present invention, at the time of assembly, the chuck 7 is mounted inside the inner hole of the output shaft 2 and the chuck nut 8 is screwed into the male screw. The first bearing 10 and the second bearing 11 are press-fitted into the output shaft 2 and are fixed with a collar 9. The first end 21 of the output shaft 2 includes an outer spline, and connects the output shaft 2 to the inner spline of the gear bearing 4. The planetary gear mechanism meshes with the inner ring gear 12 and is fitted into the housing 1 to fix the planetary gear mechanism in the locking groove. One end of the rotor is provided with outer spline teeth and meshes with idler teeth 5, and rolling bearings are press-fitted into both ends of the rotor, and the rotor is fixed in the casing 13. As a result, the rotor rotates quickly. The stator 15 is non-rotatably fixed in a locking groove corresponding to the casing 13, and has one end having a conducting wire, and includes a capacitor 31, a brush knob 19, a brush knob copper inner lining 20, a brush cap 18, a switch 24, and a power source. Connected to line 29. After all the parts and conductors are properly arranged, the casing 13 is closed and the screws are tightened, the brush 16 and the brush copper spring 17 are placed in the through hole of the brush knob inner lining 20, and then the brush cap 18 is attached to the brush knob 19. Conclude.

  In the present invention, the chuck 7 is attached to the output shaft 2 during use, and the polishing head is attached to the chuck 7 and fixed with the chuck nut 8. When the electric machine rotates, the planetary gear mechanism is driven to rotate by the outer spline teeth at the front end of the rotor, and the polishing head is rotated by rotating the output shaft 2 by the rotation shifted by the planetary gear mechanism.

  The electric grinder of the present invention operates in a state where the drive shaft and the output shaft are arranged in a straight line, so that the volume is small and the operability is excellent. And the rotational speed of an output shaft can be 600-10000 r / min, Preferably, the rotational speed of the said output shaft shall be 6000-8000 r / min. As a result, the torque of the output shaft can be increased 10 to 100 times under the condition of equivalent input power, the adjustment range is relatively wide, and it can be applied in many cases and is convenient to use. There is flexibility.

  In the present invention, a planetary gear mechanism is adopted as a transmission mechanism, and the output shaft 2 and the electric machine are connected via a planetary gear, so that a rotational speed necessary for design can be obtained as compared with a conventional configuration. , Increase the stability of the equipment, extend the service life of electrical machinery, especially the service life of consumables, and obtain greater torque. Further, it is possible to prevent the temperature of the object to be polished from becoming too high during the polishing process, and the optimum effect of polishing is achieved. The present invention is used in fields such as polishing, polishing, and grinding (shaving).

In short, according to the new electric grinder of the present invention, it can be used conveniently, vibration and noise are greatly reduced, the stability of the whole device is increased, and the service life of the electric machine, especially the service life of consumables, is extended. Therefore, the structure is compact without waste. Specifically:
1. The present invention has a configuration in which the drive mechanism and the output shaft are connected via the planetary gear mechanism, so that it is necessary to use the same electric machine by changing only the planetary gear mechanism as compared with the conventional configuration. Speed and direction of rotation can be obtained. Therefore, the rotational speed can be reduced (600 to 10000 r / min, 6000 to 8000 r / min in the normal optimum state), and the output torque is increased, and the torque of the output shaft is reduced under the condition of equivalent input power. It can be increased 10 to 100 times. As a result, many standards of consumables can be used, vibration and noise can be greatly reduced, the stability of the entire apparatus can be increased, and the service life of the electric machine, in particular, the service life of the consumables can be extended. Since the use of consumable materials generally requires a rotational speed of 3000 to 10000 r / min, it is possible to prevent the temperature of the object to be polished from becoming too high during the polishing process. Therefore, the present invention can be applied to many fields such as polishing, polishing, and grinding (shaving).

2. The outer conical surface of the spring chuck of the present invention and the inner conical hole (inner conical hole) of the output shaft cooperate to provide a function of using the increased driving force and conversion driving force as a work clamping force, A minimum moment of inertia can be obtained during the operation.

3. Since the drive shaft and the output shaft of the present invention operate in a state of being arranged in a straight line, the volume of the airframe can be reduced, the visual effect is excellent, and the operability is excellent. The collar provided on the output shaft prevents the shaft of the gear bearing from moving and improves the operability (operability).

4). The brush knob copper inner lining of the present invention contacts the brush and rotor and conducts them, thus avoiding the life-related effects of traditional conductors on the brush. In addition, the use of the brush knob copper inner lining can delay the deformation of the brush knob due to the excessive brush temperature, so that the influence on the free expansion and contraction of the brush can be avoided.

  While the invention has been described herein with reference to specific embodiments thereof, it will be understood that various changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, the specification and drawings should be regarded as illustrative rather than restrictive.

Preferably, further comprising a chuck and Chakkuna' DOO, said second end portion is provided with an inner bore and a male screw, the chuck is located inside the bore, the chuck nut is engaged with the male thread Accordingly, the position of the chuck is limited to the inside of the inner hole.

Preferably, further, provided with a chuck 7 and Chakkuna' DOO 8, the second end 22 provided with an inner hole (inner hole) and the male screw, chuck 7 is located inside the bore, the chuck nut 8 is the By engaging with the male screw, the position of the chuck 7 is limited to the inside of the inner hole. In one specific embodiment of the present invention, the chuck 7 is a spring chuck, and the outer cone surface and the inner cone hole (inner cone hole) of the output shaft 2 cooperate to increase the driving force and the conversion driving force. In addition to having the function of workpiece clamping force, it obtains the minimum moment of inertia when the equipment is operating.

Claims (13)

A new electric grinder comprising a housing, an output shaft that is rotatably fixed in the housing and has a first end and a second end, and a drive mechanism that is fixed to the housing and has a drive shaft In
Furthermore, a planetary gear mechanism that is located in the housing and meshes with the housing is provided,
The drive shaft is coupled to the first end of the output shaft via the planetary gear mechanism so as to drive rotation of the output shaft,
The planetary gear mechanism includes a gear bearing, idler teeth, and a gear pin.
The gear bearing is connected to the idler tooth via the gear pin, the idler tooth meshes with the housing and the drive shaft, and the gear bearing is connected to the first end of the output shaft. A new electric grinder characterized by that. A first outer spline is provided at the first end;
The gear bearing is provided with a first inner spline;
The new electric grinder according to claim 1, wherein the first outer spline meshes with the first inner spline. A second outer spline is provided on the drive shaft;
The new electric grinder according to claim 1, wherein the drive shaft meshes with the idler teeth through the second outer spline.   The new electric grinder according to claim 1, wherein the drive shaft is located in the gear bearing. Furthermore, a chuck and a chuck nut polishing head are provided,
The second end of the output shaft comprises an inner hole and a male thread;
The chuck is located inside the inner hole;
2. The new electric grinder according to claim 1, wherein the chuck nut is engaged with the male screw to limit the position of the chuck within the inner hole. And a collar, a first bearing and a second bearing fixed in parallel to the housing and provided in parallel,
The output shaft is provided to penetrate the first bearing and the second bearing and is fixed to the first bearing and the second bearing,
2. The new type electric grinder according to claim 1, wherein the collar is fixed to the output shaft so as to regulate positions of the first bearing and the second bearing. Furthermore, an inner ring gear fixed in the housing is provided,
The new electric grinder according to claim 1, wherein the planetary gear mechanism meshes with the inner ring gear and indirectly meshes with the housing via the inner ring gear. The drive mechanism is an electric machine,
The electric machine includes a casing, a brush mechanism, a stator, and a rotor,
The casing is fixed to the housing; the stator is fixed in the casing; and the drive shaft is positioned in the stator and is rotatably fixed in the housing;
The new electric grinder according to claim 1, wherein the brush mechanism is located in the casing and is electrically connected to the rotor. The brush mechanism includes a brush, a brush copper spring, a brush cap, a brush knob, and a brush knob copper inner lining,
The brush knob is fixed in the casing and located in the brush cap,
The brush knob copper inner lining is located in the brush knob and penetrates the brush knob to contact the rotor;
The brush and the brush copper spring are located in the brush knob copper inner lining,
The new electric grinder according to claim 8, wherein both ends of the brush copper spring are in contact with each of the brush and the brush cap.   The new electric grinder according to any one of claims 1 to 9, wherein the drive shaft and the output shaft operate in a state of being arranged in a straight line.   The new electric grinder according to any one of claims 1 to 9, wherein a rotation speed of the output shaft is 600 to 10000 r / min.   The new electric grinder according to claim 11, wherein a rotation speed of the output shaft is 6000 to 8000 r / min.   The new electric grinder according to any one of claims 1 to 9, wherein the torque of the output shaft increases 10 to 100 times under the condition of equivalent input power.

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