CN216265210U

CN216265210U - Angle grinder

Info

Publication number: CN216265210U
Application number: CN202122395013.1U
Authority: CN
Inventors: 胡勤
Original assignee: Nantong Gold Index Tools Co ltd
Current assignee: Nantong Gold Index Tools Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-04-12
Anticipated expiration: 2031-09-30

Abstract

The utility model relates to an angle grinder in the technical field of electric tools, which comprises a shell, a driving mechanism, a transmission mechanism, a machine base and a control assembly, wherein the shell is used for installing and fixing the driving mechanism and the control assembly, the machine base is connected with the shell and is used for installing and fixing the transmission mechanism, the transmission mechanism is installed on the machine base, and the driving mechanism is rotationally connected with the transmission mechanism and drives the transmission mechanism to rotate so as to drive a grinding sheet installed on the transmission mechanism to grind. The utility model adopts the brushless motor device to lead the whole structure to be compact, and the shell is arranged into a split structure, thereby not only being convenient for installation, but also ensuring the stable rotation of the driving part of the brushless motor and improving the product quality.

Description

Angle grinder

Technical Field

The utility model relates to the technical field of electric tools, in particular to an angle grinder.

Background

An angle grinder is a portable electric tool, and is mainly used for cutting, grinding and brushing metal and stone materials. However, in the conventional angle grinder, the angle grinder using alternating current has the problems that the motor is scrapped quickly after a carbon brush and a commutator are worn, and the service life of the angle grinder is shortened. And after the part adopts brushless motor, though solved the problem of carbon brush and commutator wearing and tearing, often its casing is simple adoption butt-splice structure only for the rotor takes place off-centre easily, has reduced the transmission effect.

The retrieval of the prior art shows that the Chinese utility model patent publication No. CN206925686U discloses a brushless DC angle grinder, which is characterized in that the diameter of a stator cylinder is 50mm on the basis of the prior art, four symmetrical plane fixing parts are cut on the outer side wall, the inner wall of a motor shell is a cylindrical inner wall, the diameter of the inner wall is 50mm, and two fixing strips are respectively arranged on the corresponding two side walls, so that the stator maximizes the power of the motor in a limited motor shell, a gap is left between the stator plane fixing part and the motor shell, the whole stator can not block the motor shell, and the motor can not ventilate and radiate; meanwhile, the control panel is horizontally arranged in the control panel shell, the radiating fins of the control panel are communicated with the ventilation nets on the two sides, and the radiating fins of the control panel can suck air through the ventilation net on the other side of the handle no matter which hand of a user holds the angle grinder, so that the control panel cannot be burnt out; the booster is provided with two filter capacitors so that current can be shunted, and the angle grinder can work for a long time. Although the above patent technology uses a brushless motor, the structure is complex and practical and inconvenient.

SUMMERY OF THE UTILITY MODEL

In view of the shortcomings of the prior art, it is an object of the present invention to provide an angle grinder.

The utility model provides an angle grinder which comprises a shell, a driving mechanism, a transmission mechanism, a base and a control assembly, wherein the driving mechanism is arranged on the shell;

the shell comprises a first shell and a second shell, the base, the second shell and the first shell are sequentially connected from top to bottom, a battery inserting groove is formed in the bottom of the first shell, and the base is provided with an accommodating cabin;

the driving mechanism comprises a motor stator, a motor rotor, a driving shaft and a brushless control board, the brushless control board is installed in the first shell, the motor stator is arranged in the second shell and electrically connected with the brushless control board, the motor rotor is located in an inner cavity of the motor stator, the motor rotor is connected to the driving shaft in a sleeved mode, two ends of the driving shaft extend out of two end faces of the motor rotor, one end of the driving shaft is used for being rotatably connected with a structure in the second shell, and the other end of the driving shaft extends into the containing cabin;

the transmission mechanism comprises a machine shell, a rotor and a transmission shaft, wherein the rotor is rotationally connected in the machine shell, one end of the transmission shaft penetrates through the center of the rotor and extends out of the machine shell, the transmission shaft synchronously rotates along with the rotor, the machine shell is covered on the accommodating cabin, and one end face of the rotor is positioned in the accommodating cabin and is in meshing transmission with the driving shaft;

the control assembly comprises a switch button, the switch button is installed in the first shell, and the switch button is electrically connected with the brushless control panel.

In some embodiments, the end face of the rotor is provided with bevel gear faces, and the part of the driving shaft extending into the accommodating cabin is a bevel gear part which is in meshing transmission with the bevel gear faces.

In some embodiments, a receiving groove is formed in the receiving chamber, a bearing is fixed in the receiving groove, and the other end of the transmission shaft extends out of the rotor and is rotatably connected with the bearing.

In some embodiments, the base is further provided with a bearing plate, the bearing plate and the accommodating cabin form an L-shaped structure, an arc-shaped groove is formed in the bearing plate, a flange is arranged at the lower part of the casing, and the flange is adapted to be located in the arc-shaped groove when the casing is connected to the base.

In some embodiments, the control assembly further comprises a lock button capable of placing the switch button in an on state.

In some embodiments, the first housing includes a left housing and a right housing, the inner surface of the left housing is provided with a sub docking post, the inner surface of the right housing is provided with a female docking post, and when the left housing is docked with the right housing, the sub docking post is nested in the female docking post.

In some embodiments, the second housing is a conical housing, and the sectional area of the end surface of the second housing, which is in butt joint with the base, is larger than the sectional area of the end surface of the second housing, which is in butt joint with the first housing.

In some embodiments, a clamping groove is formed in the outer peripheral surface of the second shell, a clamping ring is arranged on the inner peripheral surface of the first shell, and the clamping ring is clamped in the clamping groove when the first shell is in butt joint with the second shell.

In some embodiments, a card is disposed on an upper portion of the first housing, a groove is disposed on an outer circumferential surface of the second housing, and the card is adapted to be engaged with the groove when the first housing is engaged with the second housing.

In some embodiments, the number of the clamping pieces is multiple, the clamping pieces are arranged at intervals along the circumferential direction of the first shell, and the grooves correspond to the clamping pieces one to one.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model adopts the brushless motor device to lead the whole structure to be compact, and the shell is arranged into a split structure, thereby not only being convenient for installation, but also ensuring the stable rotation of the driving part of the brushless motor and improving the product quality.

2. According to the utility model, by optimizing the structure of the base, the stress stability of the transmission mechanism is improved, and the service life of the product is prolonged.

3. According to the utility model, the structure of the joint of the first shell and the second shell is optimized, so that the firmness of the connection of the first shell and the second shell is improved, and the overall structural strength of the shell is enhanced.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic diagram of an explosive structure according to the present invention;

FIG. 2 is a schematic view of a right housing structure of the first housing of the present invention;

FIG. 3 is a cross-sectional view of a second housing of the present invention;

fig. 4 is a schematic view of the overall structure of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the utility model. All falling within the scope of the present invention.

Example 1

The utility model provides an angle grinder, as shown in fig. 1 to 4, comprising a housing 100, a driving mechanism 200, a transmission mechanism 300, a stand 400 and a control assembly 500, wherein the housing 100 is used for installing and fixing the driving mechanism 200 and the control assembly 500, the stand 400 is connected with the housing 100 and is used for installing and fixing the transmission mechanism 300, the transmission mechanism 300 is installed on the stand 400, the driving mechanism 200 is rotatably connected with the transmission mechanism 300 and drives the transmission mechanism 300 to rotate, and further drives a grinding sheet installed on the transmission mechanism 300 to carry out grinding operation.

The housing 100 is a split structure and includes a first housing 110 and a second housing 120, the first housing 110 is a hand-held portion, and the second housing 120 is a main body mounting portion of the driving mechanism 200. The first housing 110 and the second housing 120 are connected in a vertically abutting manner, and the other end of the second housing 120 abuts against the base 400, i.e. the first housing 110, the second housing 120 and the base 400 are preferably connected in sequence from bottom to top in a coaxial manner, and can be fastened by means of screw bolts. The first housing 110 serves as a structural body for accommodating components such as the control assembly 500 and the control panel of the driving mechanism 200, and the bottom of the first housing is provided with a battery insertion groove 113, and the battery insertion groove 113 is used for inserting a mobile power supply such as a lithium battery. Preferably, first casing 110 is designed as the butt joint structure of two casing boards similarly, including left casing 111 and right casing 112, left casing 111 and right casing 112 splice into first casing 110 through the mode that sets up primary and secondary butt joint post, be provided with sub-butt joint post 1110 on the internal surface of left casing 111 promptly, set up female butt joint post 1120 on the internal surface of right casing 112, when left casing 111 docks with right casing 112, sub-butt joint post 1110 joint in female butt joint post 1120, then make sub-butt joint post 1110 and female butt joint post 1120 fastening connection through the screw, just also make left and right casing fastening connection be first casing 110. The first housing 110 is configured as a left-right docking structure, which greatly facilitates the installation of the components such as the control assembly 500, and the control assembly 500 includes a control switch 510, and the mobile power source plugged in the battery plugging slot 113 is electrically connected to the driving mechanism 200 through the control switch 510, so as to control the operation of the driving mechanism 200. Preferably, the control assembly 500 further includes a locking button 520, the locking button 520 is mounted on the control switch 510, and after the locking button 520 is moved to a corresponding position, the control switch 510 is kept in a continuously powered state, so as to reduce fatigue of the work. The second housing 120 is a cylindrical structure, and a support frame 123 is disposed therein, wherein the support frame 123 is used for fixing a main body mechanism of the driving mechanism 200.

The driving mechanism 200 is a brushless motor device, and includes a motor stator 210, a motor rotor 220, a driving shaft 230, and a brushless control board 240. The brushless control board 240 is installed in the first housing 110 and fixed by a clamping manner, and the brushless control board 240 is electrically connected to the control switch 510 and the motor stator 210, respectively. The motor stator 210 is fixed in the second housing 120 by a support frame disposed in the second housing 120, and is disposed around the inner circumferential direction of the second housing 120. The motor rotor 220 is sleeved on the driving shaft 230, two ends of the driving shaft 230 are respectively located outside two end faces of the motor stator 210, one end of the driving shaft 230 is located in a fixing groove of the base of the support frame, a bearing is installed in the fixing groove, the end of the driving shaft 230 is connected with the bearing in a matching manner, so that the rotation is stable, and the other end of the driving shaft 230 extends into the base 400 and is in driving connection with the transmission mechanism 300.

The transmission mechanism 300 includes a casing 310, a rotor 320 and a transmission shaft 330, wherein the rotor 320 is a disk-shaped structure, one end surface of the rotor 320 is a bevel gear surface 321, the rotor 320 is rotatably connected to the casing 310, the bevel gear surface 321 is located outside the casing 310, the transmission shaft 330 passes through the rotor 320 in a manner coaxial with the rotor 320 and extends to the outside of the casing 310, and the portion of the transmission shaft 330 extending to the outside of the casing 310 is used for driving the polishing pad. The housing 400 is provided with a receiving chamber 410, the receiving chamber 410 is used for receiving a rotor portion outside the casing 310, the bevel gear surface 321 of the rotor 320 is located in the receiving chamber 410 and is engaged with the driving shaft 230 located in the receiving chamber 410 for transmission, and the end of the driving shaft 230 engaged with the bevel gear surface 321 is preferably a helical gear, that is, a helical gear portion 231. The housing 310 covers the receiving chamber 410 and is fastened to the base 400 by screws. Preferably, the other end of the transmission shaft 330 extends to the outside of the bevel gear surface 321, and is adapted to the bevel gear surface, a containing groove 411 is formed in the center of the containing chamber 410, a bearing is fixed in the containing groove 411, and the end of the transmission shaft 330 extending to the outside of the bevel gear surface 321 is connected with the bearing, so that the transmission shaft 330 is more stable when being stressed to rotate.

The working principle of the utility model is as follows: after the mobile power source is plugged in the battery plugging slot 113, the control switch 510 is pressed, the motor stator 210 is connected through the brushless control board 240 and supplies power, so that the motor rotor 220 rotates, the driving shaft 230 and the bevel gear surface 321 are meshed for transmission to drive the rotor 320 to rotate, and the transmission shaft 330 outputs power outwards after rotating along with the rotor 320 to drive the grinding sheet to rotate for grinding operation. The utility model adopts the brushless motor device to lead the whole structure to be compact, and the shell is arranged into a split structure, thereby not only being convenient for installation, but also ensuring the stable rotation of the driving part of the brushless motor and improving the product quality.

Example 2

This embodiment 2 is formed on the basis of embodiment 1, through optimizing the frame structure, improves the stationarity of drive mechanism atress, prolongs the life of product. Specifically, the method comprises the following steps:

as shown in fig. 1 to 4, the base 400 is an L-shaped structure, and further includes a bearing plate 420, the bearing plate 420 is a horizontal bearing plate, the plate surface of the accommodating chamber 410 is a vertical plate surface, the bearing plate 420 and the accommodating chamber 410 are integrally formed into an L-shaped structure, and the bearing plate 420 is used for bearing the housing 310 of the transmission mechanism 300. Further, an arc-shaped groove 421 is formed in the surface of the force bearing plate 420, and in a matching manner, a flange 311 is arranged on the casing 310, and after the casing 310 is covered on the accommodating chamber 410, the flange 311 is accommodated in the arc-shaped groove 421. Through the contact fit of the arc-shaped groove 421 and the flange 311, the stress area of the casing 310 and the bearing plate 420 is increased, and the load which can be borne by the transmission mechanism is increased.

Example 3

Embodiment 3 is formed on the basis of embodiment 1 or embodiment 2, and by optimizing the structure of the joint of the first shell and the second shell, the firmness of the joint of the first shell and the second shell is improved, and the overall structural strength of the shell is enhanced. Specifically, the method comprises the following steps:

as shown in fig. 1 to 4, the second housing 120 is a conical housing, and the sectional area of the end surface of the second housing 120 abutting the base 400 is larger than the sectional area of the end surface of the second housing 120 abutting the first housing 110. In the second housing 120 with a conical structure, the end rotatably connected with the end of the driving shaft 230 is in a necking state, so that the external force load born by the second housing 120 can be effectively improved, and the service life of the housing is prolonged.

Further, a clamping structure is arranged at a connecting portion of the first casing 110 and the second casing 120, specifically, a snap ring 114 protrudes inward along a radial direction on an inner circumferential surface of the first casing 110, and in a matching manner, a clamping groove 121 is arranged on an outer circumferential surface of the second casing 120, when the first casing 110 is connected with the second casing 120, the snap ring 114 is clamped in the clamping groove 121, so that axial displacement of the first casing 110 and the second casing 120 can be effectively prevented. Because the first housing 110 also adopts a split structure, the snap ring 114 can be conveniently clamped into the clamping groove 121 when the first housing 110 is connected with the second housing 120.

Still further, a card 115 is disposed on the upper portion of the first housing 110, the card 115 is axially extended along the outer peripheral surface of the first housing 110 toward the base 400, and the card 115 may be an arc-shaped rectangle, an arc-shaped trapezoid, or other arc-shaped irregular shapes. Suitably, the second housing 120 is provided with a groove 122 on its outer circumference, and the shape of the groove 122 is adapted to the shape of the card 115. After the first shell 110 is connected with the second shell 120, the card 115 is placed in the groove 122, and the depth of the groove 122 is the same as the thickness of the card 115, so that on the basis of ensuring the overall attractive appearance, the displacement of the first shell 110 and the second shell 120 in the radial direction can be limited through the combination of the card 115 and the groove 122, and the overall structural strength of the shells is further improved. Preferably, a plurality of cards 115 are disposed on the first housing 110, the plurality of cards 115 are disposed at intervals, and correspondingly, a plurality of grooves 122 are disposed on the outer peripheral surface of the second housing 120 and correspond to the cards 115 one to one.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. An angle grinder is characterized by comprising a shell (100), a driving mechanism (200), a transmission mechanism (300), a stand (400) and a control assembly (500);

the shell (100) comprises a first shell (110) and a second shell (120), the base (400), the second shell (120) and the first shell (110) are sequentially connected from top to bottom, a battery inserting groove (113) is formed in the bottom of the first shell (110), and the base (400) is provided with an accommodating cabin (410);

the driving mechanism (200) comprises a motor stator (210), a motor rotor (220), a driving shaft (230) and a brushless control board (240), the brushless control board (240) is installed in the first housing (110), the motor stator (210) is arranged in the second housing (120) and electrically connected with the brushless control board (240), the motor rotor (220) is located in an inner cavity of the motor stator (210), the motor rotor (220) is sleeved on the driving shaft (230), two ends of the driving shaft (230) extend out of two end faces of the motor rotor (220), one end of the driving shaft (230) is used for being rotatably connected with a structure in the second housing (120), and the other end of the driving shaft (230) extends into the accommodating cabin (410);

the transmission mechanism (300) comprises a machine shell (310), a rotor (320) and a transmission shaft (330), wherein the rotor (320) is rotatably connected in the machine shell (310), one end of the transmission shaft (330) penetrates through the center of the rotor (320) and extends out of the machine shell (310), the transmission shaft (330) synchronously rotates along with the rotor (320), the machine shell (310) covers the accommodating cabin (410), and one end face of the rotor (320) is positioned in the accommodating cabin (410) and is in meshing transmission with the drive shaft (230);

the control assembly (500) comprises a switch button (510), the switch button (510) is installed in the first shell (110), and the switch button (510) is electrically connected with the brushless control board (240).

2. The angle grinder of claim 1, wherein the end face of the rotor (320) is provided with a bevel gear face (321), and the portion of the drive shaft (230) extending into the receiving compartment (410) is a bevel gear (231), and the bevel gear (231) is in meshing transmission with the bevel gear face (321).

3. The angle grinder of claim 1, wherein a receiving groove (411) is formed in the receiving chamber (410), a bearing is fixed in the receiving groove (411), and the other end of the transmission shaft (330) extends out of the rotor (320) and is rotatably connected with the bearing.

4. The angle grinder of claim 1, wherein the base (400) is further provided with a bearing plate (420), the bearing plate (420) and the accommodating cabin (410) form an L-shaped structure, an arc-shaped groove (421) is formed in the bearing plate (420), a flange (311) is arranged at the lower part of the casing (310), and when the casing (310) is connected to the base (400), the flange (311) is adapted to be seated in the arc-shaped groove (421).

5. The angle grinder of claim 1, wherein the control assembly (500) further comprises a lock button (520), the lock button (520) being configured to place the switch button (510) in an on state.

6. The angle grinder of any one of claims 1 to 5, wherein the first housing (110) comprises a left housing (111) and a right housing (112), wherein a sub docking post (1110) is arranged on the inner surface of the left housing (111), a female docking post (1120) is arranged on the inner surface of the right housing (112), and when the left housing (111) is docked with the right housing (112), the sub docking post (1110) is sleeved in the female docking post (1120).

7. The angle grinder of claim 6, wherein the second housing (120) is a conical housing, and wherein the cross-sectional area of the end surface of the second housing (120) interfacing with the stand (400) is larger than the cross-sectional area of the end surface of the second housing (120) interfacing with the first housing (110).

8. The angle grinder of claim 7, wherein the second housing (120) is provided with a clamping groove (121) on the outer peripheral surface thereof, the first housing (110) is provided with a snap ring (114) on the inner peripheral surface thereof, and when the first housing (110) is butted with the second housing (120), the snap ring (114) is clamped in the clamping groove (121).

9. The angle grinder of claim 6, wherein a card (115) is provided at an upper portion of the first housing (110), and a groove (122) is provided at an outer circumferential surface of the second housing (120), and when the first housing (110) is engaged with the second housing (120), the card (115) is adapted to be engaged in the groove (122).

10. The angle grinder of claim 9, wherein the plurality of the locking pieces (115) are provided, the plurality of the locking pieces (115) are arranged at intervals along the circumferential direction of the first housing (110), and the grooves (122) correspond to the locking pieces (115) one by one.