CN210756982U

CN210756982U - Hand-held angle grinder

Info

Publication number: CN210756982U
Application number: CN201921305121.1U
Authority: CN
Inventors: 游超龙
Original assignee: Hunan Chaoquan Industrial Co ltd
Current assignee: Hunan Chaoquan Industrial Co ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-06-16
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses a hand-held type angle grinder, including handheld shell, the head shell, driving motor, power supply unit and emery wheel, handheld shell and head shell detachably connect, driving motor locates in handheld shell, power supply unit is used for providing power supply for driving motor and realizes the electric drive in order to start driving motor operation, be equipped with in the head shell and be used for realizing the mechanical transmission in order to drive the rotatory drive mechanism of emery wheel, fixedly connected with fan blade on driving motor's the motor shaft, location portion on the fan blade is connected with drive mechanism's first transmission portion transmission, drive mechanism's second transmission portion is connected so that driving motor rotates and drives the emery wheel rotatory with the emery wheel. The utility model discloses a hand-held type angle mill has increased the transmission function on the function of the heat dissipation of guaranteeing the fan blade and blowing, and overall structure is inseparable.

Description

Hand-held angle grinder

Technical Field

The utility model relates to the technical field of mechanical equipment, in particular to hand-held type angle mill.

Background

An angle grinder, also called as a grinder or a disc grinder, is an apparatus for cutting, grinding and brushing metal and stone materials, and is based on the principle that a thin grinding wheel and a rubber grinding wheel rotating at a high speed are used for grinding, cutting, derusting and polishing the metal and stone materials.

According to the existing angle grinder sold on the market, the fan blade and the transmission gear are arranged at one end of the motor shaft, the transmission structure of the angle grinder is that the fan blade and the transmission gear are directly driven to rotate through the motor shaft, and then the transmission shaft is driven to rotate so as to enable the grinding disc to work.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hand-held type angle mill to it is big to solve current angle mill part assembly space, assembles loaded down with trivial details technical problem.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a hand-held type angle grinder, including handheld shell, the head shell, driving motor, power supply unit and emery wheel, handheld shell and head shell detachably connect, driving motor locates in handheld shell, power supply unit is used for providing power supply for driving motor and realizes the electric drive with the start-up driving motor operation, be equipped with in the head shell and be used for realizing the rotatory drive mechanism of mechanical transmission in order to drive the emery wheel, fixedly connected with fan blade on driving motor's the motor shaft, location portion on the fan blade is connected with drive mechanism's first transmission portion transmission, drive mechanism's second transmission portion is connected so that driving motor rotates and drives the emery wheel rotatory with the emery wheel.

Further, the fan blade includes the body and outstanding locating pin that extends in the lateral wall of body and the direction towards the head shell, drive mechanism includes the gear shaft of laying coaxially with the motor shaft and with the driven transmission shaft of gear shaft gear meshing, the gear shaft caves in towards the one end of fan blade and is formed with the locating hole of connecting the locating pin, so that the fan blade drives the gear shaft when rotating and rotates, the other end of gear shaft is equipped with first gear, the one end that the transmission shaft is close to the gear shaft is equipped with the second gear, the other end of transmission shaft stretches out the head shell setting and is connected with the emery wheel, first gear and the meshing of second gear drive the transmission shaft and rotate, drive the.

Furthermore, the quantity of locating pin is a plurality of, and a plurality of locating pins are evenly laid along the circumference of body, and the locating hole sets up with the locating pin one-to-one.

Furthermore, the positioning pin is in clearance fit with the positioning hole.

Further, drive mechanism still includes the oiliness bearing that is equipped with in proper order along the axial of motor shaft from the direction of head shell towards the direction of handheld shell, the retaining ring is used to the axle, the bearing clamp plate, first gear is located between axle retaining ring and the bearing, first gear passes through connecting key and gear shaft fixed connection, the bearing clamp plate is used for fixing the bearing in the head shell, axle retaining ring is used for preventing first gear from droing from the gear shaft, oiliness bearing and bearing are used for respectively following the concentricity of both ends supporting gear shaft in order to guarantee the gear shaft.

Further, the connecting key is a semicircular key.

Further, the body and the positioning pin are integrally formed.

Further, the grinding wheel is a grinding sheet, a cutting sheet or a grinding wheel, and the grinding wheel and the transmission shaft are coaxially arranged.

Further, the hand-held angle grinder also comprises a protective cover, and the protective cover is arranged between the grinding wheel and the head shell.

Furthermore, the driving motor is a brushless motor, the power supply device is a battery pack, the battery pack is arranged on one side, far away from the head shell, of the handheld shell, and the battery pack is electrically connected with the brushless motor.

The utility model discloses following beneficial effect has:

the utility model discloses a hand-held type angle grinder, through including handheld shell, the head shell, driving motor, power supply unit and emery wheel, handheld shell and head shell detachably connect, driving motor locates in handheld shell, power supply unit is used for providing power supply for driving motor in order to start driving motor operation and realize the electric drive, be equipped with in the head shell and be used for realizing mechanical transmission in order to drive the rotatory drive mechanism of emery wheel, make the angle grinder can split into mechanical drive portion and electric drive portion, connect the combination as a whole through the location of shell between the two and the transmission connection of inside, promote the packaging efficiency in the angle grinder production process, be convenient for dismantle maintenance and change the driving motor in handheld shell or the drive mechanism in the head shell alone, the maintenance cost is little; fixedly connected with fan blade on driving motor's the motor shaft, location portion on the fan blade is connected with drive mechanism's first transmission portion transmission, drive mechanism's second transmission portion is connected with the emery wheel so that driving motor rotates and drives the emery wheel rotatory, on the function of the heat dissipation of guaranteeing the fan blade and blowing, the transmission function has been increased, the fan blade direct assembly is in the synchronous drive operation heat dissipation on the motor shaft, space utilization has been improved, hand-held type angle mill overall structure's compactness has been improved, and when having improved production, the convenience of equipment.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

FIG. 1 is a schematic view of a disassembled structure of a hand-held angle grinder according to a preferred embodiment of the present invention;

fig. 2 is an exploded view of a hand-held angle grinder in accordance with a preferred embodiment of the present invention.

Illustration of the drawings:

100. a hand-held angle grinder; 10. a hand-held housing; 20. a head shell; 21. a gear shaft; 211. positioning holes; 22. a drive shaft; 23. a first gear; 24. an oil-retaining bearing; 25. a retainer ring for a shaft; 26. a bearing; 27. a bearing pressure plate; 28. a semicircular key; 30. a drive motor; 31. a motor shaft; 32. a fan blade; 321. a body; 322. positioning pins; 40. a power supply device; 50. a grinding wheel; 60. a protective cover.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered below.

FIG. 1 is a schematic view of a disassembled structure of a hand-held angle grinder according to a preferred embodiment of the present invention; fig. 2 is an exploded view of a hand-held angle grinder in accordance with a preferred embodiment of the present invention.

As shown in fig. 1 and 2, the hand-held angle grinder 100 of the present embodiment includes a hand-held housing 10, a head housing 20, a driving motor 30, a power supply device 40 and a grinding wheel 50, the hand-held housing 10 is detachably connected to the head housing 20, the driving motor 30 is disposed in the hand-held housing 10, the power supply device 40 is configured to provide a power source for the driving motor 30 to start the driving motor 30 to operate for realizing electric driving, a transmission mechanism pattern which is used for realizing mechanical transmission to drive the grinding wheel 50 to rotate is not identified in the head housing 20, a fan blade 32 is fixedly connected to a motor shaft 31 of the driving motor 30, a positioning portion on the fan blade 32 is in transmission connection with a first transmission portion of the transmission mechanism, and a second transmission portion of the transmission mechanism is connected to the grinding wheel 50 to enable the driving. The utility model discloses a hand-held type angle grinder 100, through including handheld shell 10, head shell 20, driving motor 30, power supply unit 40 and emery wheel 50, handheld shell 10 and head shell 20 detachably connect, driving motor 30 is located in handheld shell 10, power supply unit 40 is used for providing power supply for driving motor 30 and realizes the electric drive in order to start driving motor 30 operation, be equipped with in the head shell 20 and be used for realizing mechanical transmission in order to drive the rotatory drive mechanism of emery wheel, make the angle grinder can split into mechanical drive portion and electronic drive portion, the location connection through the shell between the two and the inside transmission connection combination be whole, promote the packaging efficiency in the angle grinder production process, be convenient for dismantle maintenance and change the drive mechanism in the driving motor in handheld shell 10 or the head shell 20 alone, the maintenance cost is little; fixedly connected with fan blade 32 on motor shaft 31 through driving motor 30, location portion on the fan blade 32 is connected with drive mechanism's first transmission portion transmission, drive mechanism's second transmission portion is connected with emery wheel 50 so that driving motor 30 rotates and drives emery wheel 50 rotatory, on the function of guaranteeing the heat dissipation of fan blade 32 and blowing, the transmission function has been increased, fan blade 32 direct assembly is in motor shaft 31 synchronous drive operation heat dissipation, space utilization has been improved, the compactness of hand-held type angle grinder 100 overall structure has been improved, and when having improved production, the convenience of equipment.

Further, the fan blade 32 includes a body 321 and a positioning pin 322 protruding from a side wall of the body 321 and extending toward the direction of the head housing 20, the transmission mechanism includes a gear shaft 21 coaxially disposed with the motor shaft 31 and a transmission shaft 22 in gear-meshing transmission with the gear shaft 21, one end of the gear shaft 21 facing the fan blade 32 is recessed to form a positioning hole 211 connected with the positioning pin 322, so that the gear shaft 21 is driven to rotate when the fan blade 32 rotates, the other end of the gear shaft 21 is provided with a first gear 23, one end of the transmission shaft 22 close to the gear shaft 21 is provided with a second gear, the other end of the transmission shaft 22 extends out of the head housing 20 and is connected with the grinding wheel 50, the first gear 23 is meshed with the second gear to drive the transmission shaft 22 to. The fan blade 32 is fixedly connected to the motor shaft 31 of the driving motor 30, the fan blade 32 comprises a body 321 and a positioning pin 322 protruding from the side wall of the body 321 and extending towards the direction of the head shell 20, the transmission mechanism comprises a gear shaft 21 coaxially arranged with the motor shaft 31 and a transmission shaft 22 in gear meshing transmission with the gear shaft 21, one end of the gear shaft 21 facing the fan blade 32 is recessed to form a positioning hole 211 connected with the positioning pin 322, so that the fan blade 32 drives the gear shaft 21 to rotate when rotating, the other end of the gear shaft 21 is provided with a first gear 23, one end of the transmission shaft 22 close to the gear shaft 21 is provided with a second gear, the other end of the transmission shaft 22 extends out of the head shell 20 and is connected with the grinding wheel 50, the first gear 23 is meshed with the second gear to drive the transmission shaft 22 to rotate, and then the grinding wheel 50 is driven to rotate, the design of the fan, thereby driving the transmission shaft 22 to rotate to make the grinding wheel 50 rotate, increasing the transmission function on ensuring the heat dissipation and blowing functions of the fan blades 32, improving the compactness of the whole structure of the hand-held angle grinder 100, and improving the convenience of assembly during production.

As can be understood, the grinding wheel 50 rotates tangentially to the surface of the part to process the part, in this embodiment, the power supply device 40 is a battery pack for providing power to the driving motor 30, and the driving motor 30 is electrically connected to the battery pack; in another embodiment, the power supply device 40 is an industrial power source or a generator for providing power to the driving motor 30, and the driving motor 30 is electrically connected to the industrial power source or the generator through a wire.

It is understood that the number of the positioning pins 322 may be one or more; specifically, when the number of the positioning pins 322 is plural, the positioning pins 322 may be cylindrical, or may be rectangular or other irregular shapes, and the positioning holes 211 are correspondingly arranged to the positioning pins 322, so that after the gear shaft 21 with the positioning holes 211 is matched with the fan blades 32 with the positioning pins 322, the gear shaft 21 rotates with the fan blades 32; when the number of the positioning pins 322 is one, in order to ensure that the gear shaft 21 rotates with the fan blade 32, the positioning pins 322 are non-cylindrical, and may be square, semicircular, and the like, and the positioning holes 211 are correspondingly arranged to the positioning pins 322.

Preferably, in order to ensure the smooth rotation of the transmission shaft 22 and improve the grinding accuracy of the grinding wheel 50, the transmission shaft 22 is arranged perpendicular to the gear shaft 21.

Further, the number of the positioning pins 322 is plural, the plurality of positioning pins 322 are uniformly arranged along the circumferential direction of the body 321, and the positioning holes 211 are arranged in one-to-one correspondence to the positioning pins 322. Through a plurality of locating pins 322 and the cooperation of locating hole 211 transmission, when driving first gear 23 through locating pin 322 and rotating, guaranteed the equilibrium of atress.

Preferably, the positioning pin 322 is in clearance fit with the positioning hole 211. On the premise of ensuring that the fan blade 32 rotates along with the motor shaft 31 to drive the first gear 23 to work, the pin holes in clearance fit counteract the vibration of the whole body of the angle grinder caused by the vibration of the motor.

Further, the transmission mechanism further comprises an oil-containing bearing 24, a shaft retainer ring 25, a bearing 26 and a bearing pressure plate 27 which are sequentially arranged along the axial direction of the motor shaft 31 from the direction of the head shell 20 to the direction of the hand-held shell 10, wherein the first gear 23 is arranged between the shaft retainer ring 25 and the bearing 26, the first gear 23 is fixedly connected with the gear shaft 21 through a connecting key, the bearing pressure plate 27 is used for fixing the bearing 26 in the head shell 20, the shaft retainer ring 25 is used for preventing the first gear 23 from falling off from the gear shaft 21, and the oil-containing bearing 24 and the bearing 26 are used for respectively supporting the gear shaft 21 from two ends so as to ensure the concentricity of the gear shaft 21. The front end of the gear shaft 21 close to the head shell 20 is supported by the oil-containing bearing 24, and the rear end of the gear shaft 21 is supported by the bearing 26, so that the accuracy of the assembly distance of the first gear 23 and the second gear in the head shell 20 is ensured, the processing difficulty and the processing cost are reduced, and the first gear 23 is arranged at the front end of the gear shaft 21, so that the first gear 23 and the gear shaft 21 can be externally assembled and then integrally pressed into the head shell 20, and the assembly is simple.

Further, the connecting key is a woodruff key 28. It will be appreciated that the transmission mechanism also includes a shaft circlip for further securing the first gear 23 to the gear shaft 21. The first gear 23 is fixed on the gear shaft 21 through the half key 28 and the snap spring, and the motion is transmitted to the second gear meshed with the first gear 23 through the rotation of the gear shaft 21 so as to output the torque of the driving motor 30 to complete the transmission.

Further, in order to improve the transmission accuracy of the fan blade 32, the body 321 and the positioning pin 322 are integrally formed.

Further, the grinding wheel 50 is a grinding or cutting blade or grinding wheel, and is disposed coaxially with the drive shaft 22.

Further, in order to prevent the impurities generated during the operation and grinding of the grinding wheel 50 from being splashed toward the head housing 20, the hand-held angle grinder 100 further includes a protective cover disposed between the grinding wheel 50 and the head housing 20. It is understood that the shape of the protective cover may be a circular arc shape.

Further, the driving motor 30 is a brushless motor, the power supply device 40 is a battery pack, the battery pack is disposed on a side of the handheld housing 10 away from the head housing 20, and the battery pack is electrically connected to the brushless motor. The battery pack is an environment-friendly power lithium battery pack, is convenient to carry, can be repeatedly charged and discharged, is convenient for outdoor operation by arranging the battery pack, and avoids the problem that the labor intensity of workers is increased due to the fact that wires need to be lengthened when the handheld angle grinder 100 works; the driving motor 30 is a brushless motor, does not need a carbon brush, and is energy-saving, environment-friendly and long in service life.

Further, in order to further improve the convenience of use of the hand-held angle grinder 100, the battery pack may be replaced in time in case of damage or power failure, and the battery pack is detachably connected to the hand-held housing 10.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hand-held angle grinder is characterized in that,

the grinding wheel grinding machine comprises a handheld shell (10), a head shell (20), a driving motor (30), a power supply device (40) and a grinding wheel (50), wherein the handheld shell (10) is detachably connected with the head shell (20), the driving motor (30) is arranged in the handheld shell (10), the power supply device (40) is used for providing a power supply for the driving motor (30) to start the driving motor (30) to run so as to realize electric driving,

a transmission mechanism for realizing mechanical transmission to drive the grinding wheel (50) to rotate is arranged in the head shell (20),

the grinding wheel grinding machine is characterized in that a fan blade (32) is fixedly connected to a motor shaft (31) of the driving motor (30), a positioning portion on the fan blade (32) is in transmission connection with a first transmission portion of the transmission mechanism, and a second transmission portion of the transmission mechanism is connected with the grinding wheel (50) so that the driving motor (30) rotates to drive the grinding wheel (50) to rotate.

2. The hand-held angle grinder of claim 1,

the fan blade (32) comprises a body (321) and a positioning pin (322) which protrudes out of the side wall of the body (321) and extends towards the direction of the head shell (20),

the transmission mechanism comprises a gear shaft (21) coaxially arranged with the motor shaft (31) and a transmission shaft (22) in gear meshing transmission with the gear shaft (21),

the gear shaft (21) is towards one end invagination of fan blade (32) is formed with locating hole (211) of connecting locating pin (322), so that drive when fan blade (32) rotate gear shaft (21) rotate, the other end of gear shaft (21) is equipped with first gear (23), transmission shaft (22) are close to the one end of gear shaft (21) is equipped with the second gear, the other end of transmission shaft (22) stretches out head-shell (20) set up and with emery wheel (50) are connected, first gear (23) with the meshing of second gear drives transmission shaft (22) rotate, then drive emery wheel (50) are rotatory.

3. The hand-held angle grinder of claim 2,

the number of the positioning pins (322) is multiple, the positioning pins (322) are uniformly distributed along the circumferential direction of the body (321),

the positioning holes (211) and the positioning pins (322) are arranged in a one-to-one correspondence manner.

4. The hand-held angle grinder of claim 3,

the positioning pin (322) is in clearance fit with the positioning hole (211).

5. The hand-held angle grinder of claim 4,

the transmission mechanism further comprises an oil-containing bearing (24), a shaft retainer ring (25), a bearing (26) and a bearing pressure plate (27) which are sequentially arranged from the direction of the head shell (20) to the direction of the handheld shell (10) along the axial direction of the motor shaft (31), the first gear (23) is arranged between the shaft retainer ring (25) and the bearing (26), the first gear (23) is fixedly connected with the gear shaft (21) through a connecting key,

the bearing pressure plate (27) is used for fixing the bearing (26) in the head shell (20),

the shaft retainer ring (25) is used for preventing the first gear (23) from falling off from the gear shaft (21),

the oil-impregnated bearing (24) and the bearing (26) are used for supporting the gear shaft (21) from both ends respectively to ensure concentricity of the gear shaft (21).

6. The hand-held angle grinder of claim 5,

the connecting key is a semicircular key (28).

7. The hand-held angle grinder of claim 6,

the body (321) and the positioning pin (322) are integrally formed.

8. The hand-held angle grinder of claim 7,

the grinding wheel (50) is a grinding sheet or a cutting sheet or a grinding wheel, and the grinding wheel (50) and the transmission shaft (22) are coaxially arranged.

9. The hand-held angle grinder of claim 8,

the hand-held angle grinder further comprises a protective cover (60), wherein the protective cover (60) is arranged between the grinding wheel (50) and the head shell (20).

10. The hand-held angle grinder of claim 9,

the driving motor (30) is a brushless motor, the power supply device (40) is a battery pack, the battery pack is arranged on one side, far away from the head shell (20), of the handheld shell (10), and the battery pack is electrically connected with the brushless motor.