CN114193296A

CN114193296A - High angle mill of security

Info

Publication number: CN114193296A
Application number: CN202111410299.4A
Authority: CN
Inventors: 涂嘉
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-03-18

Abstract

The invention discloses a high-safety angle grinder, which comprises a handle and a protective cover, wherein a motor cavity is arranged in the handle, a motor is fixedly arranged on the side surface of the motor cavity, a driving shaft is arranged on the right side surface of the motor, a first bevel gear is fixedly arranged at the right end of the driving shaft, a rotary hole which penetrates downwards is arranged in the lower side surface of the motor cavity, a main shaft which extends to the upper side and the lower side of the rotary hole is rotatably connected in the rotary hole, and in order to ensure safety, when the protective cover is taken down, a grinding disc cannot be driven to rotate, so that illegal operation of workers is avoided; the angle of the protective cover can be deflected under the condition that the protective cover is not detached, so that a worker can conveniently adjust the angle of the protective cover to achieve a better protection effect; the grinding sheet can rotate only when the grinding sheet is held by two hands of a worker, so that the condition that the angle grinder is out of hand when the worker is held by one hand is avoided.

Description

High angle mill of security

Technical Field

The invention relates to the technical field of angle grinders, in particular to an angle grinder with high safety.

Background

An angle grinder is a device that drives a grinding plate to rotate, thereby grinding or cutting metal.

The angle grinder on the market generally only has a protection casing as safeguard measure at present, some staff may be for seeking convenience, thereby dismantle the protection casing and carry out the operation of breaking rules and regulations, and angle grinder on the market generally does not have the ability of whether detecting the protection casing and installing at present, this is very big potential safety hazard, and the angle that probably needs to change the protection casing in the course of the work of angle grinder, in order to reach better protective effect, present angle grinder generally need carry out whole dismantlement to the protection casing, carry out the adjustment of angle again, this kind of method is very loaded down with trivial details.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the angle grinder with high safety.

The technical scheme includes that the angle grinder with high safety comprises a handle and a protective cover, a motor cavity is arranged in the handle, a motor is fixedly arranged on the side face of the motor cavity, a driving shaft is arranged on the right side face of the motor, a first bevel gear is fixedly arranged at the right end of the driving shaft, a rotating hole which penetrates downwards is arranged in the lower side face of the motor cavity, a main shaft which extends to the upper side and the lower side of the rotating hole is connected in the rotating hole in a rotating mode, a second bevel gear which is meshed with the first bevel gear is arranged at the upper end of the main shaft, an extending sleeve is fixedly arranged on the lower side face of the handle, a through hole which penetrates through the extending sleeve up and down and is used for the main shaft to pass through is formed in the extending sleeve, grinding plates can be arranged at the tail ends of the main shaft, fixing rings for fixing the grinding plates can also be arranged at the tail ends of the main shaft, a mounting hole is formed in the protective cover and can be arranged on the outer side of the extending sleeve to correspond to the grinding plates in a sleeved mode The protection function, be equipped with limiting mechanism in the extension cover, when the protection casing is not overlapped and is located when extending the cover outside limiting mechanism can restrict the rotation of main shaft, still be equipped with the annular in the lower side of handle, be equipped with a plurality of draw-in grooves of angular distribution such as in the lateral surface of annular, be equipped with the spring groove that link up left in the upper side of protection casing, sliding connection has the manual control board from side to side on the downside of spring groove, and the manual control board through a plurality of spring coupling in the right flank of spring groove, the upside of manual control board has set firmly the crescent moon board that can extend to in the annular, the lateral surface of crescent moon board has set firmly and can extend to a plurality of the embedding piece in the draw-in groove respectively, every all be equipped with an embedded groove in the upside of embedding piece, be equipped with in the downside in the motor chamber with a plurality of No. two annuluses of draw-in groove intercommunication, sliding connection has the ring piece about in No. two annular, the downside of ring piece has set firmly a plurality of adapter plate stoppers, be equipped with anti-disengaging mechanism in the handle, thereby when the drive shaft rotates anti-disengaging mechanism can be through driving the ring piece motion makes the stopper move extremely in the crescent moon board, in order to prevent the protection casing drops.

Preferably, a detection groove is formed in the inner ring surface of the protective cover, a detection plate is connected to the side surface of the detection groove through a plurality of second springs, a detection plate is fixedly arranged on the side surface, close to the main shaft, of the detection plate, an electromagnet is arranged in the side surface of the detection groove, and a distance sensor capable of detecting the position of the detection plate is further arranged in the side surface of the detection groove.

Preferably, a button capable of controlling the motor is arranged on the side surface of the handle.

Preferably, two light sensors are arranged in the outer side surface of the handle.

Preferably, the limiting mechanism is including locating the rectangular groove that link up left in the through hole left surface, rectangular inslot side to side sliding connection has the control block, and be equipped with the inside groove in the upside of rectangular groove, be equipped with in the upside of control block and extend to the spring board in the inside groove, and the spring board through several No. three spring coupling in the left surface of inside groove, the right-hand member of control block has set firmly the stop collar, the stop collar is located the outside of main shaft, and set firmly the bulge on the right flank of the interior anchor ring of stop collar, be equipped with in the anchor ring of main shaft can with bulge complex keyway, the left lower side of control block is the inclined plane, be equipped with overcurrent protector in the handle.

Preferably, anti-disengaging mechanism include through several four spring coupling in the motion ring of side on the motor chamber, the ring piece upwards extends to the motor intracavity, and connecting plate fixed connection is passed through to the upper end of ring piece in the downside of motion ring, be equipped with the inner bearing on the interior anchor ring of motion ring, be equipped with centrifugal motion ware on the anchor ring of drive shaft, the interior equal angle of outer anchor ring of centrifugal motion ware is equipped with a plurality of centrifugal grooves, there is the butt joint piece medial surface in centrifugal groove through No. five spring coupling, centrifugal motion ware is located in the interior anchor ring of motion ring.

The invention provides an angle grinder with high safety, which has the following beneficial effects:

in order to ensure safety, the protective cover cannot drive the grinding disc to rotate when being taken down, so that the illegal operation of workers is avoided;

the angle of the protective cover can be deflected under the condition that the protective cover is not detached, so that a worker can conveniently adjust the angle of the protective cover to achieve a better protection effect;

the grinding sheet can rotate only when the grinding sheet is held by two hands of a worker, so that the condition that the angle grinder is out of hand when the worker is held by one hand is avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the shield of FIG. 1;

FIG. 3 is a schematic view of the structure of FIG. 1 at pocket number one;

FIG. 4 is a schematic view of the structure A-A of FIG. 3;

FIG. 5 is a schematic view of the extension sleeve of FIG. 1;

fig. 6 is a schematic view of the extension sleeve of fig. 1 without the protective cover installed.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, an angle grinder with high safety according to an embodiment of the present invention includes a handle 11 and a protective cover 22, a motor cavity 12 is disposed in the handle 11, a motor 13 is fixedly disposed on a side surface of the motor cavity 12, a driving shaft 14 is mounted on a right side surface of the motor 13, a first bevel gear 15 is fixedly disposed at a right end of the driving shaft 14, a downwardly penetrating rotation hole 16 is disposed in a lower side surface of the motor cavity 12, a main shaft 17 extending to upper and lower sides of the rotation hole 16 is rotatably connected to the rotation hole 16, a second bevel gear 18 engaged with the first bevel gear 15 is disposed at an upper end of the main shaft 17, an extension sleeve 19 is fixedly disposed on a lower side surface of the handle 11, a through hole 24 penetrating up and down for the main shaft 17 to pass through is disposed in the extension sleeve 19, an abrasive disc 25 can be mounted at a tail end of the main shaft 17, a fixing ring 26 for fixing the abrasive disc 25 can be mounted at a tail end of the main shaft 17, be equipped with mounting hole 59 in the protection casing 22, mounting hole 59 makes the protection casing 22 can overlap and locate extend the outside of cover 19 in order to realize coping the protect function of abrasive disc 25, be equipped with limiting mechanism 23 in extending the cover 19, work as the protection casing 22 does not overlap and locate when extending the cover 19 outside limiting mechanism 23 can restrict the rotation of main shaft 17, still be equipped with an annular 20 in the lower side of handle 11, be equipped with a plurality of draw-in grooves 21 of angular distribution such as equal in the lateral surface of annular 20, be equipped with the spring groove 27 that link up left in the upper side of protection casing 22, sliding connection has manual control board 28 on the downside of spring groove 27, and manual control board 28 connect in the right flank of spring groove 27 through a plurality of springs 54, the upside of manual control board 28 sets firmly has crescent moon board 29 that can extend to in the annular 20, crescent 29's lateral surface has set firmly and has extended to a plurality ofly respectively embedded piece 30 in the draw-in groove 21, every all be equipped with an embedded groove 31 in embedded piece 30's the upside, be equipped with in the downside of motor chamber 12 with a plurality of No. two annular 32 of draw-in groove 21 intercommunication, sliding connection has ring piece 33 about in No. two annular 32, the downside of ring piece 33 has set firmly a plurality of adapter plate stoppers 34, be equipped with anti-disengaging mechanism 61 in the handle 11, when drive shaft 14 rotates anti-disengaging mechanism 61 can be through driving thereby ring piece 33 motion makes stopper 34 move extremely in the crescent 29, in order to prevent protection casing 22 drops.

In a preferred embodiment, a detecting groove 49 is formed in the inner annular surface of the protecting cover 22, a detecting plate 50 is connected to the side surface of the detecting groove 49 through a plurality of second springs 55, a detecting plate 51 is fixedly arranged on the side surface of the detecting plate 50 close to the spindle 17, an electromagnet 52 is arranged in the side surface of the detecting groove 49, a distance sensor 53 capable of detecting the position of the detecting plate 50 is further arranged in the side surface of the detecting groove 49, and when the detecting plate 51 is electrified, the detecting plate 50 is repelled until the detecting plate 51 abuts against the side surface of the grinding plate 25.

In a preferred embodiment, a button 36 capable of controlling the motor 13 is provided on the side of the grip 11, and the motor 13 is energized when the button 36 is pressed.

In a preferred embodiment, two light sensors 35 are provided on the outside of the grip 11, and the button 36 is activated only when the worker holds the grip 11 with both hands and covers the light sensors 35.

In a preferred embodiment, the limiting mechanism 23 includes a rectangular groove 37 disposed in the left side surface of the through hole 24 and penetrating leftward, a control block 38 is slidably connected to the rectangular groove 37 leftward and rightward, an inner groove 41 is disposed in the upper side surface of the rectangular groove 37, a spring plate 42 extending into the inner groove 41 is disposed in the upper side surface of the control block 38, the spring plate 42 is connected to the left side surface of the inner groove 41 through a plurality of three springs 56, a stop collar 39 is fixedly disposed at the right end of the control block 38, the stop collar 39 is located outside the spindle 17, a protruding block 40 is fixedly disposed on the right side surface of the inner ring surface of the stop collar 39, a key groove 43 capable of being engaged with the protruding block 40 is disposed in the ring surface of the spindle 17, the left lower side surface of the control block 38 is an inclined surface, an overcurrent protector is disposed in the grip 11, when the protection cover 22 is not sleeved outside the extension sleeve 19, the spring plate 42 and the control block 38 are located at the left limit by the elastic force of the third spring 56, and the protruding block 40 can be inserted into the key groove 43 to prevent the rotation of the spindle 17, and the drive shaft 14 is restricted and stops rotating, and if the motor 13 is powered on in the process, the overcurrent protector can automatically cut off the motor 13.

In a preferred embodiment, the anti-slip mechanism 61 includes a moving ring 44 connected to the upper side of the motor cavity 12 through a plurality of four-gauge springs 57, the ring block 33 extends upward into the motor cavity 12, and the upper end of the ring block 33 is fixedly connected to the lower side of the moving ring 44 through a connecting plate 60, an inner bearing 45 is provided on the inner annular surface of the moving ring 44, a centrifugal mover 46 is provided on the annular surface of the driving shaft 14, a plurality of centrifugal slots 47 are provided in the outer annular surface of the centrifugal mover 46 at equal angles, an abutting block 48 is connected to the inner side surface of the centrifugal slot 47 through a five-gauge spring 58, the centrifugal mover 46 is located in the inner annular surface of the moving ring 44, the axis of the moving ring 44 is located at the upper side of the axis of the driving shaft 14 when the driving shaft 14 is in a static state, and the abutting block 48 at the lower side abuts against the lower side of the inner annular surface of the inner bearing 45, when the driving shaft 14 rotates, the centrifugal mover 46 is driven to rotate the abutment blocks 48, at this time, the abutment blocks 48 are eccentric, and at this time, all the abutment blocks 48 abut against the inner annular surface of the inner bearing 45, and the axis of the moving ring 44 and the axis of the driving shaft 14 tend to coincide, at this time, the moving ring 44 moves downward by a certain distance, and when the moving ring 44 moves downward, the ring blocks 33 are driven to embed the limit blocks 34 into the embedding grooves 31, at this time, the crescent plate 29 and the embedding blocks 30 are difficult to move, so that the shield 22 cannot move.

The invention discloses an angle grinder with high safety, which comprises the following working procedures:

when metal grinding work needs to be carried out, the protective cover 22 and the grinding disc 25 need to be installed, at the moment, a worker unscrews the fixing ring 26 and sleeves the protective cover 22 on the outer side of the extension sleeve 19, then the worker pushes the manual control plate 28 inwards and enables the crescent 29 to be embedded into the first annular groove 20, when the crescent 29 abuts against the upper side face of the first annular groove 20, the hand is loosened, at the moment, the crescent 29 moves under the elastic force of the first spring 54 and enables the embedded block 30 to move into the clamping groove 21, at the moment, the protective cover 22 is fixed, in the process of pushing the protective cover 22 inwards, the inclined face of the control block 38 is pushed by the side face of the installation hole 59, the limiting sleeve 39 and the protruding block 40 move rightwards, when the protective cover 22 is fixed, the protruding block 40 leaves the key groove 43, at the main shaft 17 can rotate freely, at the worker installs the grinding disc 25 and screws on the fixing ring 26, at this time, the installation of the protecting cover 22 and the grinding piece 25 is completed.

Then, a worker needs to hold the grip 11 with two hands and press the button 36, at this time, the button 36 is effective and the motor 13 is powered on, when the motor 13 is powered on, the driving shaft 14 is driven to rotate, when the driving shaft 14 rotates, the main shaft 17 is driven to rotate through the meshing relation of the first bevel gear 15 and the second bevel gear 18, the rotation of the main shaft 17 can drive the abrasive disc 25 to rotate, when the motor 13 starts to be powered on, the motor 13 runs at a very low power and drives the abrasive disc 25 to rotate at a low speed, when the motor 13 starts to be powered on, the electromagnet 52 is powered on, the electromagnet 52 repels the detection plate 50 and enables the detection plate 51 to abut against the annular surface of the abrasive disc 25, at this time, the rotating abrasive disc 25 contacts the detection plate 51, if the type of the abrasive disc 25 installed by the previous worker is a wood saw blade, because the annular surface of the wood blade has a plurality of grooves, the detection plate 51 can continuously enter and exit the grooves in the rotation process of the abrasive disc 25, thereby enabling the detection plate 50 to vibrate, the abnormal motion of the detection plate 50 can be sensed by the distance sensor 53, the distance sensor 53 forces the motor 13 to be powered off at the moment, the illegal saw blade is prevented from being used for working, if the detection plate 50 does not generate abnormal motion in the low-speed rotation process of the grinding plate 25, the electromagnet 52 is powered off after a certain time, the motor 13 works at normal power at the moment, and normal metal grinding or cutting work can be carried out at the moment.

When the motor 13 works at normal power, the driving shaft 14 rotates at high speed, and at the moment, the rotation of the driving shaft 14 enables the abutting block 48 to generate a centrifugal phenomenon, so that the ring block 33 moves downwards, and the limiting block 34 is embedded into the embedded groove 31 when the ring block 33 moves downwards, so that the manual control plate 28 is prevented from being pushed in the rotating process of the grinding disc 25, the protective cover 22 is prevented from falling off, and accidents are avoided.

When the angle of the protection cover 22 needs to be adjusted, the operator turns off the motor 13, when the driving shaft 14 stops rotating, the ring block 33 and the moving ring 44 move upwards under the action of the fourth spring 57, and the limit block 34 is separated from the embedded groove 31, at this time, the operator can press the hand control board 28 inwards and rotate the protection cover 22, when the operator looses the hand after rotating to the expected angle, at this time, the embedded block 30 moves into another clamping groove 21 again, so that the angle change of the protection cover 22 is completed.

It should be understood that the above embodiments are merely exemplary, and are not intended to limit the present application. Various modifications and alterations of the above-described embodiments may be made by those skilled in the art in light of the teachings of this application without departing from the scope thereof.

Claims

1. The utility model provides a high angle mill of security, includes handle (11) and protection casing (22), its characterized in that: the handle is characterized in that a motor cavity (12) is arranged in the handle (11), a motor (13) is fixedly arranged on the side face of the motor cavity (12), a driving shaft (14) is arranged on the right side face of the motor (13), a bevel gear (15) is fixedly arranged at the right end of the driving shaft (14), a rotary hole (16) which penetrates downwards is arranged in the lower side face of the motor cavity (12), a main shaft (17) which extends to the upper side and the lower side of the rotary hole (16) is connected in the rotary hole (16) in a rotating mode, a second bevel gear (18) which is meshed with the first bevel gear (15) is arranged at the upper end of the main shaft (17), an extension sleeve (19) is fixedly arranged on the lower side face of the handle (11), a through hole (24) which is penetrated up and down to pass through the main shaft (17) is arranged in the extension sleeve (19), and a grinding disc (25) can be arranged at the tail end of the main shaft (17), the end of main shaft (17) can also install fixedly the solid fixed ring (26) of abrasive disc (25), be equipped with mounting hole (59) in protection casing (22), mounting hole (59) make protection casing (22) can overlap and locate the outside of extending cover (19) is in order to realize coping the protect function of abrasive disc (25), be equipped with limiting mechanism (23) in extending cover (19), work as protection casing (22) do not overlap and locate when extending cover (19) outside limiting mechanism (23) can restrict the rotation of main shaft (17), still be equipped with No. one annular (20) in the lower side of handle (11), be equipped with a plurality of draw-in grooves (21) of angular distribution in the lateral surface of an annular (20), be equipped with in the upper side of protection casing (22) and link up spring groove (27) to the left, the upper and lower side of spring groove (27) goes up left and right sliding connection has manual control board (28), and manual control board (28) through a plurality of spring (54) connect in the right flank in spring groove (27), the side of going up of manual control board (28) has set firmly and has extended to crescent moon board (29) in annular (20), the lateral surface of crescent moon board (29) has set firmly and has extended to a plurality ofly respectively embedded block (30) in draw-in groove (21), every all be equipped with one embedded groove (31) in the side of going up of embedded block (30), be equipped with in the downside of motor chamber (12) with a plurality of No. two annular (32) of draw-in groove (21) intercommunication, sliding connection has ring block (33) about in No. two annular (32), the downside of ring block (33) has set firmly a plurality of adapter plate stopper (34), be equipped with in handle (11) and construct (61), when drive shaft (14) rotates anti-disengaging mechanism (61) can drive thereby the ring block (33) motion makes stopper (33) motion 34) Move into the crescent (29) to prevent the shield (22) from falling off.

2. An angle grinder with high safety as claimed in claim 1, wherein: the protection cover is characterized in that a detection groove (49) is formed in the inner ring surface of the protection cover (22), the side surface of the detection groove (49) is connected with a detection plate (50) through a plurality of second springs (55), a detection plate (51) is fixedly arranged on the side surface, close to the main shaft (17), of the detection plate (50), an electromagnet (52) is arranged in the side surface of the detection groove (49), and a distance sensor (53) capable of detecting the position of the detection plate (50) is further arranged in the side surface of the detection groove (49).

3. An angle grinder with high safety as claimed in claim 1, wherein: the side surface of the handle (11) is provided with a button (36) which can control the motor (13).

4. An angle grinder with high safety as claimed in claim 1, wherein: two light sensors (35) are arranged in the outer side surface of the handle (11).

5. An angle grinder with high safety as claimed in claim 1, wherein: the limiting mechanism (23) comprises a rectangular groove (37) which is arranged in the left side face of the through hole (24) and penetrates through the through hole leftwards, a control block (38) is connected in the rectangular groove (37) in a left-right sliding manner, an inner groove (41) is arranged in the upper side face of the rectangular groove (37), a spring plate (42) which extends into the inner groove (41) is arranged in the upper side face of the control block (38), the spring plate (42) is connected to the left side face of the inner groove (41) through a plurality of three springs (56), a limiting sleeve (39) is fixedly arranged at the right end of the control block (38), the limiting sleeve (39) is positioned at the outer side of the spindle (17), a protruding block (40) is fixedly arranged on the right side face of the inner ring face of the limiting sleeve (39), a key groove (43) which can be matched with the protruding block (40) is arranged in the ring face of the spindle (17), and the left lower side face of the control block (38) is an inclined face, an overcurrent protector is arranged in the grip (11).

6. An angle grinder with high safety as claimed in claim 1, wherein: anti-disengaging mechanism (61) include through several No. four spring (57) connect in the motion ring (44) of side is gone up in motor chamber (12), ring piece (33) upwards extend to in motor chamber (12), and connecting plate (60) fixed connection in are passed through to the upper end of ring piece (33) the downside of motion ring (44), be equipped with inner bearing (45) on the interior anchor ring of motion ring (44), be equipped with centrifugal motion ware (46) on the anchor ring of drive shaft (14), the interior isogonism of outer anchor ring face of centrifugal motion ware (46) is equipped with a plurality of centrifugal grooves (47), the medial surface of centrifugal groove (47) is connected with butt joint piece (48) through No. five spring (58), centrifugal motion ware (46) are located the interior anchor ring face of motion ring (44).