CN103786086A - Angle grinder - Google Patents
Angle grinder Download PDFInfo
- Publication number
- CN103786086A CN103786086A CN201410058892.0A CN201410058892A CN103786086A CN 103786086 A CN103786086 A CN 103786086A CN 201410058892 A CN201410058892 A CN 201410058892A CN 103786086 A CN103786086 A CN 103786086A
- Authority
- CN
- China
- Prior art keywords
- angle
- grinding machine
- pull bar
- circuit
- primary circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/028—Angle tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
Abstract
The embodiment of the invention provides an angle grinder comprising an angle grinder shell, an angle grinder original circuit, a pull rod, a linkage driving device, a limit device and delayers. The angle grinder original circuit drives a motor to operate. A first end of the pull rod is connected with the angle grinder shell in a rotatable mode, a sleeve ring is fixed to a second end of the pull rod, the pull rod can rotate between a first angle and a second angle, and the second angle is larger than the first angle. When at the first angle, the pull rod drives the power supply end of the angle grinder original circuit to be connected with positive rotation circuits through the linkage driving device so that the angle grinder original circuit can drive the motor to rotate in the forward direction; when at the second angle, the pull rod enables the power supply end of the angle grinder original circuit to be connected with backward rotation circuits through the linkage driving device so that the angle grinder original circuit can supply reverse driving force to the motor. The limit device is used for fixing the position of the pull rod when the pull rod rotates to be at the second angle. The delayers are used for controlling the connection duration time between the power supply end of the angle grinder original circuit and the backward rotation circuits.
Description
Technical field
The invention belongs to angle grinding machine technical field, relate in particular to a kind of angle grinding machine that can reduce personal injury degree that has.
Background technology
Small-sized angle grinding machine has a wide range of applications in fields such as marble slabs moulding processing, indoor decorations, but owing in use meeting accident and slipping out of the hand sometimes, angle grinding machine after slipping out of the hand, still in the state of running up, therefore can cause very large personal injury and infringement.
Summary of the invention
Slip out of the hand protective device and the angle grinding machine with this device that the invention provides a kind of angle grinding machine, can, in the time that angle grinding machine is surprisingly slipped out of the hand, at utmost reduce the kinetic energy of machine run, reduces angle grinding machine to personal extent of injury and reduce property loss.
For achieving the above object, the invention provides a kind of angle grinding machine, comprising:
Angle grinding machine shell;
Angle grinding machine primary circuit, is positioned at grinding machine shell inside, angle, and drive motor turns round;
Pull bar, its first end is rotatably connected with described angle grinding machine shell, and the second end is fixed with a collar, and described pull bar can rotate between the first angle and the second angle, and described the second angle is greater than described the first angle;
Linkage driving device, at pull bar, during in the first angle, the feeder ear that described pull bar orders about described angle grinding machine primary circuit by linkage driving device is connected prograde circuit, so that described angle grinding machine primary circuit drive motor is rotated in the forward; At pull bar, during in the second angle, described pull bar makes the feeder ear of described angle grinding machine primary circuit connect circuit for reversing by linkage driving device, so that described angle grinding machine primary circuit provides reverse actuating force for motor;
Stopping means, is arranged on the grinding machine shell of described angle, for during to the second angle, the position of this pull bar being fixed in the rotation of described pull bar;
Delayer, for controlling the feeder ear of described angle grinding machine primary circuit and the on-time of described circuit for reversing, and in the time reaching the default duration, cuts off being electrically connected between the feeder ear of described angle grinding machine primary circuit and circuit for reversing.
Compared with prior art, in the time that angle grinding machine is surprisingly slipped out of the hand, the collar has little time immediately from departing from hand, and therefore the collar is subject to pulling force in one's hands, drives pull bar to rotate to the second angle place.When pull bar is during to the second angle, stopping means is fixed the position of pull bar, pull bar continues to make the feeder ear of angle grinding machine primary circuit connect circuit for reversing by linkage driving device, so that angle grinding machine primary circuit provides reverse actuating force for motor, moment diagonal angle grinding machine by reversion slows down, thereby reduces angle grinding machine to personal injury and property loss.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a state of the angle grinding machine in the embodiment of the present invention;
Fig. 2 is the schematic diagram of another state of the angle grinding machine in the embodiment of the present invention;
Fig. 3 is a kind of concrete structure schematic diagram of the stopping means in the grinding machine of angle of the present invention;
Fig. 4 is the schematic diagram of another state of the stopping means in Fig. 3.
The specific embodiment
For making that object of the present invention, structure, feature and function thereof are had to further understanding, hereby coordinate embodiment to be described in detail as follows.
Fig. 1 shows the schematic diagram of a state of the angle grinding machine in the embodiment of the present invention, and Fig. 2 shows the schematic diagram of another state of the angle grinding machine in the embodiment of the present invention, please be simultaneously referring to Fig. 1 and Fig. 2.Angle grinding machine in the present embodiment comprises angle grinding machine shell 1, angle grinding machine primary circuit 2, pull bar 3, the collar 4, linkage driving device, stopping means 6 and delayer 9.
Wherein, each internal component of the interior placement of angle grinding machine shell 1 angle grinding machine.For example angle grinding machine primary circuit 2 is positioned at angle grinding machine shell 1, and is used for drive motor (not shown) and turns round.The first end 3a of pull bar 3 is connected with angle grinding machine shell 1 is rotatable, and particularly, the first end 3a of pull bar 3 is articulated with on angle grinding machine shell 1; The second end 3b of pull bar 3 fixes a collar 4.
At pull bar 3, during in the first angle, the feeder ear that pull bar 3 orders about angle grinding machine primary circuit 2 by linkage driving device is connected prograde circuit 8, so that grinding machine primary circuit 2 drive motor (not shown) in angle are rotated in the forward; At pull bar 3, during in the second angle, pull bar 3 makes the feeder ear of angle grinding machine primary circuit 2 connect circuit for reversing 7 by linkage driving device, so that the 2 drive motors reverse rotations of angle grinding machine primary circuit.
Stopping means 6 is arranged on angle grinding machine shell 1, and this stopping means 6 when rotating to the second angle at pull bar 3, fixes the position of pull bar 3.
Delayer 9 is for the on-time of feeder ear and the circuit for reversing 7 of pilot angle grinding machine primary circuit 2, and in the time that the on-time reaches default duration, cuts off the feeder ear of angle grinding machine primary circuit 2 and being electrically connected of circuit for reversing 7.
User is in the time of the angle grinding machine using in the embodiment of the present invention, push pull bar 3 to position in the first angle, then hand is through the collar 4 of pull bar 3 one end, and the place of controlling of holding angle grinding machine, the feeder ear that now pull bar 3 orders about angle grinding machine primary circuit 2 by linkage driving device is connected prograde circuit 8, the normal rotary work of motor in the grinding machine of angle.In the time that angle grinding machine is surprisingly slipped out of the hand, the collar 4 has little time immediately from departing from hand, and therefore the collar 4 is subject to pulling force in one's hands, drives pull bar 3 to rotate to the second angle place.When pull bar 3 is during to the second angle, stopping means 6 is fixed the position of pull bar 3, pull bar 3 continues to make the feeder ear of angle grinding machine primary circuit 2 connect circuit for reversing 7 by linkage driving device, so that angle grinding machine primary circuit 2, for motor provides reverse actuating force, slows down by the moment diagonal angle grinding machine of reversion.But in practice, the duration of the driving force of reversing here should be controlled within a certain period of time, otherwise will cause the motor in the grinding machine of angle then carry out reverse High Rotation Speed, can threaten equally personal safety, so can be controlled at the default duration by delayer 9 time, being electrically connected between the feeder ear of cut-out angle grinding machine primary circuit 2 and circuit for reversing 7, and then can realize motor in the grinding machine of angle and after the reversion driving force of appropriate time, slow down and stop being subject to, kinetic energy while farthest reducing unexpected slipping out of the hand, reduce angle grinding machine to personal injury and property loss.
In a specific embodiment, angle grinding machine also comprises change-over switch 10, and the feeder ear of angle grinding machine primary circuit 2 is connected with change-over switch 10.This change-over switch 10 is connected feeder ear and the prograde circuit 8 of angle grinding machine primary circuit 2 under the first state, connects feeder ear and the circuit for reversing 7 of angle grinding machine primary circuit 2 under the second state.As depicted in figs. 1 and 2, this change-over switch 10 is specifically as follows a double-point double-throw switch, and this double-point double-throw switch switches between the first state and the second state, thereby realizes the feeder ear of angle grinding machine primary circuit 2 and exchanging of zero line and live wire annexation.In addition, delayer 9 can, for being connected on the fuse in circuit for reversing 7, can be realized and be cut off the feeder ear of angle grinding machine primary circuit 2 and being electrically connected of circuit for reversing 7 by the fusing of fuse.And the fusing time of fuse and electric current have certain relation, under the condition of certain electric current, by the model of choose reasonable fuse, the duration that pilot angle grinding machine primary circuit 2 and circuit for reversing 7 are connected well.In the time using the disposable delayers such as fuse, preferably, at the opposite position place of angle grinding machine shell 1, movable slip lid (not shown) is set, in the time that this movable slip lid is scratched, the disposable delayer such as fuse is exposed, with the delayer that facilitates user more to renew.
In practice, linkage driving device can specifically comprise a back-moving spring 51 and stay cord 52.Stay cord 52 cylinder lever connecting rods 3 and change-over switch 10, stay cord 52 can pull change-over switch 10 to make it switch to the second state from the first state.One end of back-moving spring 51 is connected with change-over switch, and the other end and press section 51a join.When pull bar 3 is positioned at the first angle, pull bar 3 offsets with press section 51a, presses back-moving spring 51, makes change-over switch 10 in connecting the feeder ear of angle grinding machine primary circuit 2 and the state (as shown in Figure 1) of prograde circuit 8.When pull bar 3 is positioned at the second angle, pull bar 3 pulls stay cord 52, change-over switch 10 is positioned at and connects the feeder ear of angle grinding machine primary circuit 2 and the state (as shown in Figure 2) of circuit for reversing 7.
For more attractive in appearance and easy to use, pull bar 3 is in the time of the first angle, and this railing 3 can be positioned at angle grinding machine shell 1, and in the time that user normally uses angle grinding machine, pull bar 3 can not take up room in grinding machine outside, angle like this.
Fig. 3 shows a kind of concrete structure schematic diagram of the stopping means in the grinding machine of angle of the present invention, Fig. 4 shows the schematic diagram of the another one state of the stopping means in Fig. 3, please be simultaneously referring to Fig. 3 and Fig. 4, this stopping means 6 has and comprises a bayonet lock body 61, this bayonet lock body 61 is through angle grinding machine shell 1, and bayonet lock body 61 is limited on angle grinding machine shell 1 by limit spring 62, bayonet lock body 61 has inclined-plane 61a and faces 61b directly through one end of angle grinding machine shell 1 inner side one side.This inclined-plane 61a is towards pull bar 3.Pull bar 3 by the first angle position in the process of the second change in angular position, pull bar 3 jack-up inclined-plane 61a(state as shown in Figure 3).In the time that pull bar 3 slips over inclined-plane 61a and faces the intersection of 61b directly, bayonet lock body 61 is resetted by the effect of limit spring 62, makes pull bar 3 and face 61b directly to offset, so that pull bar 3 is fixed on the second angle place (state as shown in Figure 4).
Angle grinding machine after slipping out of the hand beyond user in the present invention can farthest reduce kinetic energy, completes braking.In the time that user need to reuse angle grinding machine, can extract bayonet lock body 61, pull bar 3 is pushed back to the first angle place, so that the feeder ear of angle grinding machine primary circuit 2 can be connected with prograde circuit 8, impel the motor of angle grinding machine to run well.If user uses fuse as delayer, also need the fuse that more renews, be the protective effect preparatory condition of slipping out of the hand beyond next time.
In practice; while producing reverse rotating brake unexpected slipping out of the hand; be equivalent to motor stuck; the problem may generation current increasing; therefore likely burn angle grinding machine internal circuit, but find in test, the large electric current of short time causes the possibility of burning little; even and if burn circuit, consider to be also worth from the angle of protection personal safety.
In addition, inventor is finding by test, can in the grinding machine primary circuit of angle, increase frequency modulation member.The circuit of angle grinding machine belongs to inductive circuit, and its operation principle is the rotating excitation field of utilizing electric current electricity to produce.In this inductive circuit, add frequency modulation member, change the frequency of alternating current, can change the size of electric current, therefore the electric current in circuit can be very not large, reduces the risk of burning angle grinding machine.In addition, changing after frequency, the rotating excitation field in the grinding machine of angle changes, and falling low-frequency time, rotating speed can reduce.Be at this time that spinner velocity is fast in fact, and rotating speed corresponding to low frequency is slower than the rotating speed of rotor, the magnetic field force diagonal angle grinding machine being equivalent in the grinding machine of angle is braked, and the low current that low frequency is corresponding but makes electric current very little, can not injure angle grinding machine.
Moreover, can also in the grinding machine primary circuit of angle, install voltage regulation part additional.Angle grinding machine burn with burning of motor to be identical, to be all that the problems of excessive heat that large electric current produces causes.From heat production equation, the size of heat is relevant with curtage (both are proportional, are not independent quantities), after installing regulator additional, just can control voltage, thereby controls heat production, prevents burning of angle grinding machine.Although may have a certain impact to the effect of braking, also can reach good braking object, also can alleviate to a great extent injury.
The present invention is described by above-mentioned related embodiment, but above-described embodiment is only for implementing example of the present invention.Must be pointed out that, the embodiment having disclosed does not limit the scope of the invention.On the contrary, the change done without departing from the spirit and scope of the present invention and retouching, all belong to scope of patent protection of the present invention.
Claims (10)
1. an angle grinding machine, is characterized in that, comprising:
Angle grinding machine shell;
Angle grinding machine primary circuit, is positioned at grinding machine shell inside, angle, and drive motor turns round;
Pull bar, its first end is rotatably connected with described angle grinding machine shell, and the second end is fixed with a collar, and described pull bar can rotate between the first angle and the second angle, and described the second angle is greater than described the first angle;
Linkage driving device, at pull bar, during in the first angle, the feeder ear that described pull bar orders about described angle grinding machine primary circuit by linkage driving device is connected prograde circuit, so that described angle grinding machine primary circuit drive motor is rotated in the forward; At pull bar, during in the second angle, described pull bar makes the feeder ear of described angle grinding machine primary circuit connect circuit for reversing by linkage driving device, so that described angle grinding machine primary circuit provides reverse actuating force for motor;
Stopping means, is arranged on the grinding machine shell of described angle, for during to the second angle, the position of this pull bar being fixed in the rotation of described pull bar;
Delayer, for controlling the feeder ear of described angle grinding machine primary circuit and the on-time of described circuit for reversing, and in the time reaching the default duration, cuts off being electrically connected between the feeder ear of described angle grinding machine primary circuit and circuit for reversing.
2. angle according to claim 1 grinding machine, it is characterized in that, the feeder ear of described angle grinding machine primary circuit is connected with change-over switch, described change-over switch is connected feeder ear and the described prograde circuit of angle grinding machine primary circuit under the first state, under the second state, connect feeder ear and the described circuit for reversing of angle grinding machine primary circuit.
3. angle according to claim 2 grinding machine, it is characterized in that, described change-over switch is double-point double-throw switch, and described double-point double-throw switch switches between the first state and the second state, realizes the feeder ear of angle grinding machine primary circuit and the exchange of zero line and live wire annexation.
4. angle according to claim 2 grinding machine, is characterized in that, described linkage driving device comprises a back-moving spring and stay cord;
Described stay cord connects described pull bar and described change-over switch;
One end of described back-moving spring is connected with described change-over switch, and the other end and press section join;
Described pull bar is in the time of the first angle, and described pull bar and described press section offset, and press described back-moving spring, so that described change-over switch is in connecting the feeder ear of angle grinding machine primary circuit and the state of prograde circuit;
Described pull bar is in the time of the second angle, and described pull bar pulls described stay cord, so that described change-over switch is in connecting the feeder ear of angle grinding machine primary circuit and the state of circuit for reversing.
5. angle according to claim 1 grinding machine, it is characterized in that, described stopping means comprises a clamping pin mechanism, described clamping pin mechanism comprises bayonet lock body, described bayonet lock body is through described angle grinding machine shell, and be limited on the grinding machine shell of described angle by a limit spring, described bayonet lock body has inclined-plane and faces directly through one end of described angle grinding machine shell inner side one side, described inclined-plane is towards described pull bar, described pull bar by the first angle position in the process of the second change in angular position, inclined-plane described in described pull bar jack-up, and streak this inclined-plane with described in face directly intersection time, described bayonet lock body is resetted by spacing spring action, and then make described pull bar and face directly to offset, so that described pull bar is fixed on the second angle place.
6. angle according to claim 1 grinding machine, is characterized in that, described pull bar is in the time of the first angle, and described pull bar is positioned at described angle grinding machine shell.
7. angle according to claim 1 grinding machine, is characterized in that, described delayer is the fuse being connected in described circuit for reversing.
8. angle according to claim 7 grinding machine, is characterized in that, the grinding machine shell position corresponding with described fuse, described angle is provided with movable slip lid, and in the time that movable slip lid is scratched, described fuse is exposed.
9. angle according to claim 1 grinding machine, is characterized in that, in the grinding machine primary circuit of described angle, also comprises frequency modulation member.
10. angle according to claim 1 grinding machine, is characterized in that, in the grinding machine primary circuit of described angle, also comprises voltage regulation part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410058892.0A CN103786086A (en) | 2013-12-05 | 2014-02-21 | Angle grinder |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310651370.7 | 2013-12-05 | ||
| CN201310651370 | 2013-12-05 | ||
| CN201410058892.0A CN103786086A (en) | 2013-12-05 | 2014-02-21 | Angle grinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103786086A true CN103786086A (en) | 2014-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410058892.0A Pending CN103786086A (en) | 2013-12-05 | 2014-02-21 | Angle grinder |
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| Country | Link |
|---|---|
| CN (1) | CN103786086A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105773363A (en) * | 2016-05-09 | 2016-07-20 | 赵辰宇 | Multifunctional angle grinder achieving automatic protection function when angle grinder slips out of hand |
-
2014
- 2014-02-21 CN CN201410058892.0A patent/CN103786086A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105773363A (en) * | 2016-05-09 | 2016-07-20 | 赵辰宇 | Multifunctional angle grinder achieving automatic protection function when angle grinder slips out of hand |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140514 |