CN211220127U - Clutch device of angle grinder - Google Patents

Abstract

The utility model relates to a clutch of angle mill, including shell, plug, handle, motor, angle abrasive disc, clutch includes output shaft, gear wheel, clutch disc, separation and reunion round pin clamp plate, the output shaft passes gear wheel, clutch disc, separation and reunion round pin clamp plate in proper order, clutch's gear wheel passes pinion engagement with the motor and links to each other, gear wheel central authorities are provided with circular through-hole, be provided with separation and reunion cotter way around the circular through-hole, be provided with a plurality of separation and reunion round pin through-holes on the separation and reunion piece, the separation and reunion round pin. The utility model discloses when meeting the resistance at angle grinding piece during operation, can make the clutch disc idle running and can not influence the gear wheel and rotate to can not influence the motor and rotate the harm that causes the motor.

Description

Clutch device of angle grinder

Technical Field

The utility model relates to an electric tool technical field especially relates to an angle mill's clutch.

Background

An angle grinder, also called a grinder or a disc grinder, is a grinding tool for cutting and grinding glass fiber reinforced plastics. The angle grinder is a portable electric tool for cutting and grinding glass fiber reinforced plastics, and is mainly used for cutting, grinding and brushing metal and stone materials. The angle grinder that exists at present is in the use, and earlier with the power cable circular telegram, open the switch, driving motor start-up work, the rotor rotates, drives drive gear through output gear and rotates, and drive gear relies on the connected mode drive output pivot of tight fit to rotate to the emery wheel piece of establishing in output pivot outer end tip is rotated in the drive, and like this, pivoted emery wheel piece and workpiece surface contact are in order to play the grinding effect. However, when the resistance of the grinding wheel increases suddenly, if the grinding wheel encounters a hard object to be processed suddenly, the grinding wheel directly transmits the suddenly increased resistance to the driving motor through the transmission gear and the output gear through the output rotating shaft, the situation of rotation blockage often occurs, sometimes the driving motor is even directly damaged, the normal use and the service life of the angle grinder are seriously affected, and unnecessary damage is caused.

SUMMERY OF THE UTILITY MODEL

In view of the not enough of background art existence, the utility model relates to an angle mill's clutch has set up one kind and can not influence motor pivoted structure according to above-mentioned problem, and this structure drives the angle grinding piece rotatory when the motor normally rotates, when meetting the resistance, can make the clutch plate idle running and can not influence the gear wheel rotation to can not influence the motor and rotate the harm that causes the motor.

The utility model relates to a clutch of angle mill, including shell, plug, handle, motor, angle abrasive disc, clutch includes output shaft, gear wheel, clutch disc, separation and reunion round pin clamp plate, the output shaft passes gear wheel, clutch disc, separation and reunion round pin clamp plate in proper order, clutch's gear wheel passes pinion engagement with the motor and links to each other, gear wheel central authorities are provided with circular through-hole, be provided with separation and reunion cotter way around the circular through-hole, be provided with a plurality of separation and reunion round pin through-holes on the separation and reunion piece, the separation and reunion round pin.

By adopting the scheme, the clutch device is simple in structure, the clutch can rotate reversely according to the structure, and the large gear is not influenced.

Furthermore, 6 clutch pin grooves are formed in the clutch pin groove, the clutch pin groove is in a round corner rectangular shape, the clutch pin groove comprises a first slope and a second slope, the first slope and the second slope are located on opposite surfaces, and the gradient of the first slope is larger than that of the second slope.

By adopting the scheme, when the clutch pin enters and exits the clutch pin slot, the first slope is not easy to slide out of the first slope due to the higher gradient of the first slope, and the second slope can easily slide out of the second slope, so that a condition is provided for the clutch to idle reversely.

Furthermore, a clutch plate through hole is formed in the middle of the clutch plate, the clutch plate through hole is a rectangle with two opposite sides being curves, 6 clutch pin through holes are formed in the periphery of the clutch plate through hole, and the clutch pin through holes are rounded rectangles.

By adopting the scheme, the rotation direction of the clutch and the clutch plate through hole can be limited.

Furthermore, the clutch pins are arranged in 6 number and are respectively positioned in 6 clutch pin through holes, and the clutch pins are cylinders.

Through adopting above-mentioned scheme, cylinder separation and reunion round pin can roll in separation and reunion round pin through-hole.

Furthermore, the clutch pin pressing plate is a circular plate, a circular hole is formed in the middle of the clutch pin pressing plate, a spring is arranged above the clutch pin pressing plate, and the clutch pin pressing plate presses the clutch pin through the spring.

By adopting the scheme, the spring plays a role of resetting the clutch pin pressure plate, so that when the clutch rotates reversely, the clutch pin slides out of the second slope to enable the clutch pin pressure plate to move up and down.

Further, a spring seat is arranged at the upper end of the spring, a steel wire clamp spring is arranged at the position of the shell spring, and the steel wire clamp spring is clamped with the spring seat.

By adopting the scheme, the connected spring can have a supporting point.

Furthermore, an external thread is arranged below the output shaft, and a structure with the same shape as the through hole of the clutch plate is arranged at the joint of the output shaft and the clutch plate.

By adopting the scheme, the external thread can drive the angle grinding sheet to rotate, and the output shaft can drive the clutch to rotate together.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic view of the overall structure of an angle grinder according to an embodiment of the present invention.

Fig. 2 is an enlarged view of area a of fig. 1 according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a gearwheel according to embodiment 1 of the present invention.

Fig. 4 is a schematic top view of the clutch device according to embodiment 1 of the present invention.

Fig. 5 is an exploded schematic view of a clutch device according to embodiment 1 of the present invention.

Fig. 6 is an exploded schematic view of a clutch device according to embodiment 2 of the present invention.

Reference numeral, 1-housing; 2-a plug; 3-a handle; 4-a motor; 5-angle lapping; 6-a clutch device; 61-an output shaft; 62-a bull gear; 621-circular through hole; 622-clutch pin slot; 6221-a first ramp; 6222-a second ramp; 63-a clutch plate; 631-clutch plate through hole; 64-a clutch pin; 65-clutch pin pressure plate; 7-a spring; 8-spring seats; 9-a steel wire clamp spring; 10-pinion.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described and discussed below with reference to the accompanying drawings of the present invention, and it is obvious that only some examples, not all examples, of the present invention are described herein, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

For the convenience of understanding the embodiments of the present invention, the following detailed description will be given by way of example with reference to the accompanying drawings, and the embodiments are not limited to the embodiments of the present invention.

The embodiment 1 of the utility model refers to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and shows, including shell 1, plug 2, handle 3, motor 4, angle abrasive disc 5, clutch 6 has solved angle abrasive disc 5 and has reversed the problem that causes the harm to the engine because of the resistance takes place. A pinion 10 is connected to the motor. Clutch device 6 is including passing gear wheel 62, clutch plate 63, the output shaft 61 of separation and reunion round pin clamp plate 65 in proper order, the pinion meshes with gear wheel 62, gear wheel 62 central authorities are provided with circular through-hole 621, be provided with 6 separation and reunion cotter ways 622 around the circular through-hole 621, be provided with separation and reunion round pin 64 in the separation and reunion cotter way 622, separation and reunion cotter way 622 can be divided into two kinds of slope structures: a first ramp 6221 and a second ramp 6222, the first ramp 6221 having a high slope so that the clutch pin 64 does not slip off the surface under the clutch pin pressure plate 65, and the second ramp having a low slope so that the clutch pin 64 easily slips off the surface under the clutch pin pressure plate 65.

The center of the clutch plate 63 is provided with a clutch plate through hole 631, the shape of the clutch plate through hole 631 is a rectangle with curved edges, and the clutch plate through hole 631 is clamped with the output shaft 61 and rotates along with the rotation of the output shaft 61, so that the clutch pin 64 in the clutch plate through hole 631 rolls. A spring 7 is arranged above the clutch pin pressing plate 65, a spring seat 8 is arranged at the other end of the spring 7, and the spring seat 8 is fixed on a steel wire clamp spring 9 on the shell 1.

The number of the clutch pins 64 in the embodiment 1 is only one example, and is not limited to 6, and may be other numbers.

The principle of the utility model is as follows:

after the plug 2 is connected with electricity, the switch of the handle 3 is turned on, so that the motor 4 rotates, the motor 4 drives the small gear 10 to rotate, and the small gear 10 drives the large gear 62 to rotate clockwise. The spring 7 presses the clutch pin pressing plate 65, the clutch pin 64 starts to roll due to the rotation of the large gear 62, when the clutch pin rolls to the clutch pin groove 622, the clutch pin 64 is influenced by the pressure of the clutch pin pressing plate 65 and the high-inclination slope of the first slope 6221 to perform continuous rolling operation, the clutch plate 63 is driven to rotate due to overlarge stress of the clutch pin 64, the clutch plate 63 drives the output shaft 61 to rotate through a structure of the clutch plate through hole 631 corresponding to the output shaft 61, and the output shaft 61 drives the angle grinding disc 5 to rotate for grinding operation.

When the angle grinding disc 5 receives the resistance great, can stop rotatory or reverse, the angle grinding disc 5 that reverses this moment drives output shaft 61 and reverses, output shaft 61 drives the reversal of clutch plate 63, and the clutch plate through-hole 631 on the clutch plate 63 drives the reversal of separation and reunion round pin 64, and the reversal of separation and reunion round pin 64 can go out the rotation to second slope 6222, and roll-off separation and reunion round pin groove 622 for separation and reunion round pin clamp plate 65 is up-and-down axial motion under the effect of spring 7. So that the large gear 62 is not subjected to a reverse rotation force and thus does not affect the normal rotation of the motor 4. Effectively avoiding the damage of the motor 4 and prolonging the service life of the motor 4.

The embodiment 2 of the utility model relates to as shown in fig. 6, according to embodiment 1's basis, change into spherical steel ball with clutch pin 64, the change of clutch plate through-hole 631 shape on the clutch plate 63 is circular, clutch pin groove 622 sets up to circular, and other functions and principles are unchangeable, and first slope 6221 is the same with second slope 6222 inclination, and when the reversal, the reversal dynamics is greater than the elasticity of spring for clutch pin clamp plate 65 is axial motion about being under the effect of spring 7, thereby makes the rotation of gear wheel 62 not influenced, has protected the motor. The number of the clutch pins 64 is 8, and other numbers can be adopted.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (7)

1. The utility model provides a clutch of angle mill, includes shell, plug, handle, motor, angle abrasive disc, its characterized in that: still include clutch device, clutch device includes output shaft, gear wheel, clutch disc, separation and reunion round pin clamp plate, gear wheel, separation and reunion piece, separation and reunion round pin clamp plate are passed in proper order to the output shaft, clutch device's gear wheel passes through the pinion engagement with the motor and links to each other, gear wheel central authorities are provided with circular through-hole, be provided with separation and reunion cotter way around the circular through-hole, be provided with a plurality of separation and reunion round pin through-holes on the separation and reunion piece, the separation and reu.

2. The clutch device of an angle grinder as set forth in claim 1, wherein: the clutch pin slot is provided with 6, the clutch pin slot is in a round corner rectangle shape, the clutch pin slot comprises a first slope and a second slope, the first slope and the second slope are located on opposite surfaces, and the gradient of the first slope is larger than that of the second slope.

3. The clutch device of an angle grinder as set forth in claim 2, wherein: the clutch plate is characterized in that a clutch plate through hole is formed in the middle of the clutch plate, the clutch plate through hole is a rectangle with two opposite sides being curves, 6 clutch pin through holes are formed in the periphery of the clutch plate through hole, and the clutch pin through holes are round-angle rectangles.

4. The clutch device of the angle grinder as set forth in claim 3, wherein: the clutch pins are arranged in 6 numbers and are respectively positioned in the 6 clutch pin through holes, and the clutch pins are cylinders.

5. The clutch device of the angle grinder as set forth in claim 4, wherein: the clutch pin pressing plate is a circular plate, a circular hole is formed in the middle of the clutch pin pressing plate, a spring is arranged above the clutch pin pressing plate, and the clutch pin pressing plate presses the clutch pin through the spring.

6. The clutch device of the angle grinder as set forth in claim 5, wherein: the spring upper end is provided with the spring holder, the shell spring position is provided with the steel wire jump ring, the steel wire jump ring and spring holder joint.

7. The clutch device of an angle grinder as set forth in claim 1, wherein: an external thread is arranged below the output shaft, and a structure with the same shape as the through hole of the clutch plate is arranged at the joint of the output shaft and the clutch plate.

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