CN101081502A - Electric hammer drill having overload protection clutches - Google Patents
Electric hammer drill having overload protection clutches Download PDFInfo
- Publication number
- CN101081502A CN101081502A CN 200710070011 CN200710070011A CN101081502A CN 101081502 A CN101081502 A CN 101081502A CN 200710070011 CN200710070011 CN 200710070011 CN 200710070011 A CN200710070011 A CN 200710070011A CN 101081502 A CN101081502 A CN 101081502A
- Authority
- CN
- China
- Prior art keywords
- driving
- driven wheel
- disc
- turnbarrel
- overload protection
- 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.)
- Pending
Links
Images
Abstract
The present invention discloses one kind of percussion drill with an overload protecting clutch comprising one driving gear, one driving disc, transmission elements, one pressure plate, one spring and one nut. The driving gear near the driving disc axially and one rotating sleeve rotate oppositely, the driving disc is connected to the rotating sleeve for transferring torque, the transmission elements between the driving gear and the driving disc can slide to transmit torque, and the spring pressing the pressure plate for transmitting torque to rotate the sleeve. In case of exceeding the limit torque, the transmission elements are extruded into the driving disc to compress the spring so as to unlock. The overload protecting clutch has simple structure, high reliability and adjustable limit torque.
Description
Technical field
The present invention relates to hand held electric tool, especially relate to a kind of electric hammer and bore with overload protection clutches.
Background technology
Disclosed such hand held electric tool has safety clutch, when drilling tool is stuck in the rapidoprint, when cutter stops operating suddenly, can make operating personnel avoid suffering bigger anti-torque.All be arranged on the turnbarrel adjacent at the overload-release clutch on the disclosed hand held power machine with tool holder, wherein, one is clutch sleeve, can be inserted in turnbarrel one end, driving torque is by a plurality of transmitting element transmission, these transmitting elements are placed in the V-shaped groove of clutch sleeve, and the wedge shaped washer that loads by external springs compresses, when torque preestablished limit torque above, transmitting element will extrude from the v shape groove of clutch sleeve, and clutch sleeve stops the rotation, and turnbarrel can be rotated further, therefore, the inside and outside meeting of clutch sleeve is influenced the service life of product by heavy wear.In addition, in disclosed patent 200510074349.0, be provided with an overload-release clutch that when overstepping the extreme limit torque, separates between driven wheel and the turnbarrel, it has two transmitting elements by transmitting torque and forms the sealed clutch components of shape, when overstepping the extreme limit torque, can resist the elastic force of axial action and can throw off locking.This structure takes up room bigger, and the processing and manufacturing cost is higher, and breakdown torque can't be adjusted simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of hammer drill or percussion drill with overload protection clutches; by axial adjacent driven wheel and driving-disc; utilize the transmitting element of a plurality of transmitting torques; when overstepping the extreme limit torque; the initial tension of spring that can overcome axial action interrupts the moment of torsion transmission; to reach the purpose of overload protection, simultaneously, can set different breakdown torques by the axial location of adjusting nut.
The technical solution adopted for the present invention to solve the technical problems is:
In housing; has drive motor; be arranged on beater mechanism in the turnbarrel by the toggle driven in translation; in addition, drive motor is by transmission device, and bevel gear drives driven wheel; rotation drives a turnbarrel; the rotation of this turnbarrel drives anchor clamps, inserts cutter in the anchor clamps, wherein is provided with the overload protection clutches that separates when overstepping the extreme limit torque between driven wheel and turnbarrel.Described overload protection clutches comprises nut, spring, pressing plate, driving-disc, transmitting element and driven wheel; Driven wheel and driving-disc are axially adjacent, driven wheel and turnbarrel relatively rotate, driving-disc and turnbarrel key joint, the transmitting element that has a plurality of five equilibriums distributions, transmitting torque in the middle of driven wheel and the driving-disc, the left side of driving-disc is provided with a pressing plate, can compress the actuated element that passes through hole on the driving-disc, nut is threaded with turnbarrel, pressing plate is compressed by the spring left side by nut, make the moment of torsion of driven wheel to be delivered on the driving-disc by transmitting element, and then the rotation of driven rotary sleeve, by the torque of rotating nut accommodation limit.
Radially even a plurality of taper holes that distribute on the end face of the non-flank of tooth of the driven wheel of described clutch, taper hole can hold transmitting element.
A plurality of through holes that radially evenly distribute of the driving-disc of described clutch, its position is corresponding with the taper hole on the driven wheel.
Described transmitting element is a plurality of steel balls.
The present invention compares the beneficial effect that has with background technology:
The present invention is simple in structure, can be according to breakdown torque, and the initial tension of spring that overcome axial action interrupts the moment of torsion transmission, reaching the purpose of overload protection, and different breakdown torques can be set.Simultaneously, can set different breakdown torques by the axial location of adjusting nut.
Description of drawings
Fig. 1 is the clutch work schematic diagram of normal operating conditions.
Fig. 2 is the clutch work schematic diagram of overload.
Fig. 3 is the structural representation of hammer drill.
Fig. 4 is the A-A view of Fig. 2
Among the figure: 1, turnbarrel, 2, nut, 3, spring, 4, pressing plate, 5, driving-disc, 6, transmitting element, 7, driven wheel, 8, housing, 9, toggle, 10, drive motor, 11, bevel gear, 12, transmission device, 13, piston, 14, bearing, 15, jump bit, 16, anchor clamps, 17, cutter.
The specific embodiment
As shown in Figure 3; in housing 8; have drive motor 10, be arranged on beater mechanism in the turnbarrel 1 by toggle 9 driven in translation, in addition; drive motor 10 is by transmission device 12; bevel gear 11 drives driven wheel 7, and rotation drives a turnbarrel 1, and this turnbarrel 1 rotation drives anchor clamps 16; insert cutter 17 in the anchor clamps 16, wherein between driven wheel 7 and turnbarrel 1, be provided with the overload protection clutches that when overstepping the extreme limit torque, separates.Described overload protection clutches comprises nut 2, spring 3, pressing plate 4, driving-disc 5, transmitting element 6 and driven wheel 7.Be used for when surpassing peak torque the transmission of drives interrupts power.Driven wheel 7 and driving-disc 5 are axially adjacent, and driven wheel 7 relatively rotates with turnbarrel 1, driving-disc 5 and turnbarrel 1 key joint, but transmitting torque.The transmitting element 6 that has a plurality of transmitting torques in the middle of driven wheel 7 and the driving-disc 5, can transmit moment of torsion by this transmitting element 6, there is a pressing plate 4 left side of driving-disc 5, with with compress the actuated element 6 that passes through hole on the driving-disc 5, pressing plate 4 is compressed by spring 3 left sides by nut 2, makes the moment of torsion of driven wheel 7 to be delivered on the driving-disc 5 by transmitting element 6, and then 1 rotation of driven rotary sleeve, simultaneously, can pass through rotating nut 2 accommodation limit torques.
As shown in Figure 1, a plurality of taper holes that radially evenly distribute on the end face of the non-flank of tooth of the driven wheel 7 of described clutch, taper hole can hold transmitting element 6.
As shown in Figure 2, a plurality of through holes that radially evenly distribute of the driving-disc 5 of described clutch, its position is corresponding with the taper hole on the driven wheel 7.
Described transmitting element 6 is a plurality of steel balls.
Operation principle of the present invention is as follows
When operate as normal, as shown in figures 1 and 3, but drive motor 10 and transmission device 12 and the toggle that is connected 9 driven in translation pistons 13, this piston 13 is in turnbarrel 1, by the compressed air spring, on jump bit 15, produce and impact, thereby promotion drift, then impact tool 17 travels forward, in addition, drive motor 10 is also by drive transmission 12, and a bevel gear 11, this bevel gear 11 and driven wheel 7 engagements, pressing plate 4 is compressed by spring 3, pressing plate 4 is pressed on actuated element 6 in the taper hole of driven wheel 7, thereby makes moment of torsion to be delivered to driving-disc 5 from driven wheel 7 by transmitting element 6, and driving-disc 5 adopts spline fitted with turnbarrel 1, thereby driven rotary sleeve 1 rotation, turnbarrel 1 drives anchor clamps 16 rotations friction tight with it, and the cutter 17 of key connecting rotates thereupon in the anchor clamps 16, thereby realizes the hammer drill function of electric tool.
When cutter 17 is stuck, as Fig. 2, shown in Figure 4, drive motor 10 transmits drive on the driven wheel 7 by bevel gear 11, will be applied in the moment of torsion above predetermined value on the driven wheel 7, when the moment of torsion on the driven wheel 7 surpasses peak torque, driven wheel 7 is extruded into transmitting element 6 in the through hole of driving-disc 5, simultaneously, overcome the pretightning force of spring 3, pressing plate 4 is backed down, thereby, the driving of 1 of driven wheel 7 and turnbarrel is connected separates.
The invention that is used for explaining of the above-mentioned specific embodiment, rather than limit the invention, in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (4)
1; a kind of electric hammer with overload protection clutches bores; in housing (8); has drive motor (10); be arranged on the interior beater mechanism of turnbarrel (1) by toggle (9) driven in translation; in addition; drive motor (10) is by transmission device (12); bevel gear (11) drives driven wheel (7); rotation drives a turnbarrel (1); this turnbarrel (1) rotation drives anchor clamps (16); insert cutter (17) in the anchor clamps (16), wherein between driven wheel (7) and turnbarrel (1), be provided with the overload protection clutches that when overstepping the extreme limit torque, separates.It is characterized in that: described overload protection clutches comprises nut (2), spring (3), pressing plate (4), driving-disc (5), transmitting element (6) and driven wheel (7); Driven wheel (7) is axially adjacent with driving-disc (5), driven wheel (7) relatively rotates with turnbarrel (1), driving-disc (5) and turnbarrel (1) key joint, having a plurality of five equilibriums in the middle of driven wheel (7) and the driving-disc (5) distributes, the transmitting element of transmitting torque (6), the left side of driving-disc (5) is provided with a pressing plate (4), can compress and pass the actuated element (6) that driving-disc (5) is gone up through hole, nut (2) is threaded with turnbarrel (1), pressing plate (4) is compressed by spring (3) left side by nut (2), make the moment of torsion of driven wheel (7) to be delivered on the driving-disc (5) by transmitting element (6), and then driven rotary sleeve (1) rotation, by rotating nut (2) accommodation limit torque.
2. a kind of electric hammer with overload protection clutches according to claim 1 bores, and it is characterized in that: a plurality of taper holes that radially evenly distribute on the end face of the non-flank of tooth of the driven wheel of described clutch (7), taper hole can hold transmitting element (6).
3. a kind of electric hammer with overload protection clutches according to claim 1 bores, and it is characterized in that: a plurality of through holes that radially evenly distribute of the driving-disc of described clutch (5), its position is corresponding with the taper hole on the driven wheel (7).
4. a kind of electric hammer with overload protection clutches according to claim 1 bores, and it is characterized in that: described transmitting element (6) is a plurality of steel balls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710070011 CN101081502A (en) | 2007-07-13 | 2007-07-13 | Electric hammer drill having overload protection clutches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710070011 CN101081502A (en) | 2007-07-13 | 2007-07-13 | Electric hammer drill having overload protection clutches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101081502A true CN101081502A (en) | 2007-12-05 |
Family
ID=38911397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710070011 Pending CN101081502A (en) | 2007-07-13 | 2007-07-13 | Electric hammer drill having overload protection clutches |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101081502A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405793A (en) * | 2014-11-30 | 2015-03-11 | 重庆泽田汽车部件有限责任公司 | Safety clutch |
| CN110914562A (en) * | 2017-02-17 | 2020-03-24 | 皮科特解决方案有限公司 | Mechanical protective clutch |
| CN113005944A (en) * | 2021-03-01 | 2021-06-22 | 江西岱泊智能科技有限公司 | Vehicle stop with overload protection |
-
2007
- 2007-07-13 CN CN 200710070011 patent/CN101081502A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405793A (en) * | 2014-11-30 | 2015-03-11 | 重庆泽田汽车部件有限责任公司 | Safety clutch |
| CN110914562A (en) * | 2017-02-17 | 2020-03-24 | 皮科特解决方案有限公司 | Mechanical protective clutch |
| CN113005944A (en) * | 2021-03-01 | 2021-06-22 | 江西岱泊智能科技有限公司 | Vehicle stop with overload protection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201067896Y (en) | Electric hammer drill with overload protection clutch | |
| US7886841B2 (en) | Power tool torque overload clutch | |
| CN1211176C (en) | Hand-operated machine tool | |
| CN1143756C (en) | Automatic shaft locking mechanism | |
| GB2424249A (en) | Power tool with overload clutch mounted in cavity in gear-cog | |
| RU2601528C2 (en) | Device against overload of power screwdriver | |
| CN102192255A (en) | Safety clutch for drilling machine | |
| CN105569562B (en) | A kind of torque overload protects instrument | |
| CN101081502A (en) | Electric hammer drill having overload protection clutches | |
| CN102052438A (en) | Gear drive structure with function of overload protection | |
| CA2390826C (en) | Hammer drill | |
| US4191264A (en) | Impact wrench | |
| CN101210590B (en) | Torque limiter | |
| CN101813146A (en) | Coupling braking load limiter | |
| CN111878517A (en) | Bidirectional adjustment friction coupling for electric switch machine | |
| EP1914431B1 (en) | Method of activating a drive system using a portable power source. | |
| CN116619308A (en) | Fixed torsion module for power tool | |
| JP5420093B2 (en) | Power transmission control device and crushing device | |
| EP1793143A1 (en) | Worm/Crown-wheel-assembly gear reducer comprising a torque limiter | |
| US20090321102A1 (en) | Hand-held power tool | |
| EP2145072A1 (en) | Coupling arrangement for coupling rock drill shank | |
| CN209774564U (en) | roller friction type clutch and electric wrench with same | |
| US20050139445A1 (en) | Wedge clutch assembly | |
| US6848998B2 (en) | Wedge clutch assembly | |
| CN205503803U (en) | Diamond drill safety arrangement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |