CN103737560B - The clutch apparatus of electric tool - Google Patents
The clutch apparatus of electric tool Download PDFInfo
- Publication number
- CN103737560B CN103737560B CN201410005690.XA CN201410005690A CN103737560B CN 103737560 B CN103737560 B CN 103737560B CN 201410005690 A CN201410005690 A CN 201410005690A CN 103737560 B CN103737560 B CN 103737560B
- Authority
- CN
- China
- Prior art keywords
- clutch
- gear
- block
- little axle
- clutch gear
- 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.)
- Active
Links
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Abstract
The invention discloses a kind of clutch apparatus of electric tool, comprise reduction box and cover at the middle cover on front side of reduction box, little axle is through reduction box antetheca, clutch shaft bearing is provided with between little axle and middle cover, the second bearing is provided with between little axle and reduction box antetheca, little axle is socketed with butterfly spring successively between the second bearing and clutch shaft bearing, clutch gear and clutch block, clutch block and little axle are fixed together, clutch gear is pressed on clutch block by butterfly spring, intermeshing clutch tooth is provided with between clutch gear and clutch block, clutch gear is taken turns with the armature projection be contained in middle cover and is engaged.Clutch apparatus of the present invention, all increases at the safety and reliability of structure.
Description
Technical field
The present invention relates to clutch apparatus, is a kind of clutch apparatus be used on electric hammer in particular.
Background technology
The clutch apparatus be arranged on electric hammer can avoid the large torque reaction power in use produced because of the clamping stagnation of drill bit to pass to user, and this is a kind of safeguard protection to user.And this mechanism can also be used in the function gear shift of mechanism, when reaching gear shift, the effective effect protected is carried out to gear.Clutch apparatus security on electric hammer is used in and reliability has much room for improvement in prior art.
Summary of the invention
Technical problem to be solved by this invention is just to provide a kind of clutch apparatus be arranged on electric hammer, improves safety and reliability.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the clutch apparatus of electric tool, comprise reduction box and cover at the middle cover on front side of reduction box, little axle is through reduction box antetheca, clutch shaft bearing is provided with between little axle and middle cover, the second bearing is provided with between little axle and reduction box antetheca, little axle is socketed with butterfly spring successively between the second bearing and clutch shaft bearing, clutch gear and clutch block, clutch block and little axle are fixed together, clutch gear is pressed on clutch block by butterfly spring, intermeshing clutch tooth is provided with between clutch gear and clutch block, clutch gear is taken turns with the armature projection be contained in middle cover and is engaged.
Preferably, the clutch tooth on clutch gear and clutch block is distributed on respective end face ringwise, and the clutch tooth on clutch gear and clutch block is sector structure.
Preferably, tilt angle alpha=arctan{ [2 × Mn ×-(R+r) × μ × N of the clutch tooth on clutch gear and clutch block
bullet]/[2 × Mn × μ+(R+r) × N
bullet], wherein, F
1for the power that armature transmits clutch gear, μ is the coefficient of friction between clutch block and clutch gear, N
bulletfor butterfly spring is to the normal pressure of clutch gear.
Preferably, the rear end face edge of described clutch gear is provided with annular flange flange, described butterfly spring by annular flange flange around.
Preferably, the head end of described little axle is three grades of multidiameter structures, and clutch shaft bearing is located on first order step, and clutch block is located on the step of the second level, and clutch gear is located on third level step.
Preferably, be threaded connection between described clutch block and little axle.
The present invention adopts the clutch structure of butterfly spring, clutch gear and clutch block, and clutch gear drives clutch block, and clutch block is by driving little axle to rotate with being threaded between little axle.When little axle stall, the clutch block be together by a threaded connection with little axle also stall, power to be applied to the clutch block clutch tooth on clutch block by clutch gear during by clutch gear clutch tooth, now the pressure of clutch block to clutch gear is greater than the normal pressure of butterfly spring, clutch gear is moved up, clutch tooth between clutch gear and clutch block departs from mutually, and clutch gear dallies, and realizes threading off; When little axle stall power is cancelled, clutch gear engages each other under the effect of the normal pressure of butterfly spring Yu with the clutch tooth on clutch block, thus again drives little axle to rotate.Its structural safety and reliability all increases.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the front view of clutch gear;
Fig. 3 is the side view of clutch gear;
Fig. 4 is the front view of clutch block;
Fig. 5 is the side view of clutch block;
Fig. 6 is the force diagram of clutch gear and clutch block;
Fig. 7 is the force analysis figure of clutch gear.
Detailed description of the invention
As shown in Figures 1 to 5, the clutch apparatus of electric tool, comprise: reduction box 1, be contained in the second bearing 2 on reduction box 1, be through the little axle 6 on the second bearing 2, on little axle 6, cover has butterfly spring 3, clutch gear 4 and clutch block 5, clutch block 5 and little axle 6 are together by a threaded connection, clutch gear 4 is pressed on clutch block 5 by butterfly spring 3, clutch gear 4 arrange clutch gear clutch tooth 41 and clutch block 5 on arrange clutch block clutch tooth 51 between engage each other, clutch gear 4 and the gears meshing being contained in the armature 9 in middle cover 8, little axle 6 is fixed in middle cover 8 by clutch shaft bearing 7.
As shown in Figure 1, armature 9 rotates, and gears meshing drives clutch gear 4, and clutch gear 4 drives clutch block 5, and clutch block 5 is by driving little axle 6 to rotate with being threaded between little axle 6.When little axle 6 stall, the clutch block 5 also stall be together by a threaded connection with little axle 6, power to be applied to the clutch block clutch tooth 51 on clutch block 5 by clutch gear 4 during by clutch gear clutch tooth 41, now the pressure of clutch block 5 pairs of clutch gears 4 is greater than the normal pressure of butterfly spring 3, clutch gear 4 is moved up, clutch tooth between clutch gear 4 and clutch block 5 departs from mutually, and clutch gear 4 dallies, and realizes threading off; When little axle 6 stall power is cancelled, clutch gear 4 engages each other under the effect of the normal pressure of butterfly spring 3 Yu with the clutch tooth on clutch block 5, thus again drives little axle 6 to rotate.
The force analysis of clutch gear 4 and clutch block 5, as Fig. 6, carries out force analysis as Fig. 7 to clutch gear 4 separately:
1) N
bulletfor butterfly spring is to the normal pressure of clutch gear; 2) N
1for back-up block is to the pressure of clutch gear;
3) f
1for the frictional force in the middle of clutch gear and clutch block; 4) α is the angle of inclination of clutch gear;
5) Mn is the torsion that armature transmits clutch gear; 5) F
1tangential force on the clutch tooth 41 acted on;
6) coefficient of friction between clutch block and clutch gear is μ; 7) R is the external diameter of clutch tooth 41;
8) r is the internal diameter of clutch tooth 41; 9) Z is the number of teeth of clutch tooth
That is: f
1max=μ × N
1; F
1x=F
1× cos α; N
play x=N
bullet× sin α/Z;
F
1=Mn × 2/ [(R+r) × Z]; N
1=N
play y+ F1
y=N
bullet× cos α/Z+F
1× sin α;
When clutch gear is threaded off: f
1max+ N
play x=F
1x;
Arrange to obtain α=arctan{ [2 × Mn ×-(R+r) × μ × N
bullet]/[2 × Mn × μ+(R+r) × N
bullet].
Claims (6)
1. the clutch apparatus of electric tool, comprise reduction box (1) and cover at the middle cover (8) on front side of reduction box, little axle (6) is through reduction box antetheca, clutch shaft bearing (7) is provided with between little axle and middle cover, the second bearing (2) is provided with between little axle and reduction box antetheca, it is characterized in that: little axle is socketed with butterfly spring (3) successively between the second bearing and clutch shaft bearing, clutch gear (4) and clutch block (5), clutch block and little axle are fixed together, clutch gear is pressed on clutch block by butterfly spring, intermeshing clutch tooth is provided with between clutch gear and clutch block, clutch gear and the gears meshing being contained in the armature (9) in middle cover.
2. the clutch apparatus of electric tool according to claim 1, is characterized in that: the clutch tooth on clutch gear and clutch block is distributed on respective end face ringwise, and the clutch tooth on clutch gear and clutch block is sector structure.
3. the clutch apparatus of electric tool according to claim 2, is characterized in that: tilt angle alpha=the arctan [(F of the clutch tooth on clutch gear
1-μ × N
bullet)/(F
1× μ+N
bullet)], wherein, F
1for the power that armature transmits clutch gear, μ is the coefficient of friction between clutch block and clutch gear, N
bulletfor butterfly spring is to the normal pressure of clutch gear.
4. the clutch apparatus of electric tool according to claim 1, is characterized in that: the rear end face edge of described clutch gear is provided with annular flange flange, described butterfly spring by annular flange flange around.
5. the clutch apparatus of electric tool according to claim 4, is characterized in that: the head end of described little axle is three grades of multidiameter structures, and clutch shaft bearing is located on first order step, and clutch block is located on the step of the second level, and clutch gear is located on third level step.
6. the clutch apparatus of electric tool according to claim 5, is characterized in that: be threaded connection between described clutch block and little axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410005690.XA CN103737560B (en) | 2014-01-03 | 2014-01-03 | The clutch apparatus of electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410005690.XA CN103737560B (en) | 2014-01-03 | 2014-01-03 | The clutch apparatus of electric tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103737560A CN103737560A (en) | 2014-04-23 |
| CN103737560B true CN103737560B (en) | 2015-08-19 |
Family
ID=50494662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410005690.XA Active CN103737560B (en) | 2014-01-03 | 2014-01-03 | The clutch apparatus of electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103737560B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19942271C2 (en) * | 1999-09-04 | 2002-01-31 | Metabowerke Kg | Power tool with a locking mechanism and a safety coupling |
| DE10309012B3 (en) * | 2003-03-01 | 2004-08-12 | Hilti Ag | Control method for hand-held electric hammer drill using microcontroller for repetitive opening and closing of clutch between electric motor and tool chuck |
| CN101696715B (en) * | 2009-09-09 | 2011-04-20 | 江苏天奇物流系统工程股份有限公司 | Chain wheel overload protective device |
| CN103317190B (en) * | 2013-06-20 | 2015-07-15 | 浙江通达电器有限公司 | Multifunctional saw chuck device of fast clamping saw blade |
| CN203696941U (en) * | 2014-01-03 | 2014-07-09 | 浙江通达电器有限公司 | Clutch device of electric tool |
-
2014
- 2014-01-03 CN CN201410005690.XA patent/CN103737560B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103737560A (en) | 2014-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2010164088A5 (en) | ||
| WO2011128427A3 (en) | Rotary device for an attachment on a machine | |
| CN102148548A (en) | Motor component used for medical appliance | |
| CN203696941U (en) | Clutch device of electric tool | |
| CN107378466A (en) | A kind of electrokinetic moment formula synchronization bolt fastener | |
| CN201198129Y (en) | Electric hammer roller type safety clutch | |
| CN103737560B (en) | The clutch apparatus of electric tool | |
| CN203130848U (en) | Safe on-off device on door closer | |
| WO2014152186A3 (en) | Rotational atherectomy device with biasing clutch | |
| CN201650727U (en) | Disk-type power head anti-reverse mechanism of screw-type oil pump | |
| CA2820100A1 (en) | Chainwheel enabling positive rotational transmission and reverse rotational sliding features | |
| CN206036164U (en) | Two -way overload protection transmission | |
| CN103802054A (en) | Electrified fastening antivibrator bolt insulation torsion wrench | |
| CN105065487B (en) | A kind of clutch of motorcycle | |
| CN208364712U (en) | A kind of gear-box and the electric tool with the gear-box | |
| CN202988498U (en) | Manual turning gear device of tractor machine | |
| CN201309815Y (en) | Power winch device of conical brake | |
| CN203905876U (en) | Reverse buckling device | |
| CN201081888Y (en) | Soybean cutter-rower overload safeguard | |
| CN107524726A (en) | Torque limiter | |
| CN201108933Y (en) | Rolled steel bending machine equipped with release mechanism | |
| CN203935603U (en) | A kind of turntable rotation mechanism of dealing device | |
| CN201805318U (en) | Motor safety protection device | |
| CN204081960U (en) | A kind of door-rolling machine safety clutch device | |
| CN201799968U (en) | Double offset ring spanner with ratchet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: The clutch device of electric tools Granted publication date: 20150819 Pledgee: Bank of China Limited by Share Ltd. Jinhua branch Pledgor: ZHEJIANG TONGDA ELECTRICAL APPLIANCE Co.,Ltd. Registration number: Y2024980004449 |