CN102554878B - A kind of electric hammer - Google Patents
A kind of electric hammer Download PDFInfo
- Publication number
- CN102554878B CN102554878B CN201110405108.5A CN201110405108A CN102554878B CN 102554878 B CN102554878 B CN 102554878B CN 201110405108 A CN201110405108 A CN 201110405108A CN 102554878 B CN102554878 B CN 102554878B
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- Prior art keywords
- gear
- impact
- rotating shaft
- impact disc
- motor
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Abstract
The invention discloses a kind of electric hammer, comprise motor, the two groups of gears be simultaneously connected with a joggle by motor gear with motor, one group of gear is connected with a rotating shaft by one-way clutch, described one-way clutch is made up of needle roller and spring, is arranged in described rotating shaft, when motor output turns clockwise, this gear drives rotating shaft and the parts be fixed in rotating shaft to rotate together by described one-way clutch, and described rotating shaft also connects impact disc mechanism by gears meshing.When motor exports and is oppositely rotated counterclockwise, due to the effect of one-way clutch, this gear dallies, and rotating shaft is motionless.Another group gear described is connected with bevel gear shaft, described umbrella tooth connects output shaft again, is equipped with impact and refers in described output shaft, impacts and refers to rotate freely in output shaft and to move, described impact refers to that tail end is the position that described impact disc beats, and front end is the position of percussive drill bit.Noise of the present invention is little, it is little to vibrate, and energy conversion efficiency is high.
Description
Technical field
The present invention relates to electric tool, particularly a kind of electric hammer.
Background technology
Electric hammer is a kind of electrodynamic type rotation hammer drill with overload-release clutch with Pneumatic hammering mechanism, is mainly used on concrete, floor, brick wall and stone material and holes.Electric hammer is in fact on the basis of electric drill, add one and driven the piston having crankshaft-link rod by a motor, reciprocating air in cylinder, makes cylinder air pressure be mechanical periodicity, and the hammer in the air pressure band dynamic air cylinder of change back and forth hits the top of drill bit.But existing electric hammer energy conversion efficiency is low, noise in operating is large and vibration is large, and people needs larger power to grip electric hammer, not laborsaving, hard.
Summary of the invention
In order to overcome the defect that above-mentioned prior art exists, the invention provides a kind of electric hammer, adopt symmetrical beater mechanism, friction during running, machine efficiency is high, and noise is little, and operation is also very simple, convenient.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of electric hammer, comprise motor and be arranged on the motor gear in motor, be characterized in, described motor to be connected with a joggle two groups of gears by motor gear, and one group of gear connects a rotating shaft by one-way clutch, described one-way clutch is arranged in described rotating shaft, described rotating shaft also connects impact disc mechanism by gears meshing, and described impact disc mechanism comprises V-type axle and impact disc, and the surface of described impact disc arranges projection, described V-type axle and impact disc all arrange V-type groove, and two V-type grooves are positioned opposite.
Another group gear Connectable umbrella gear mechanism, connected by umbrella gear mechanism and refer to and output shaft with the impact of the perpendicular placement in gear direction, described impact refers to be assemblied in output shaft and can rotate freely and move, described impact refers to that tail end is the position that above-mentioned impact disc rat beats, and front end is the position of percussive drill bit.
Further, between described motor and above-mentioned two groups of gears, middle cover is set, two bearings are also set in described middle cover, be connected with described two groups of gears respectively, make each parts be connected tightr by described middle cover.
Described one-way clutch is made up of needle roller and spring, and described spring inserts in the centre bore of above-mentioned rotating shaft, and described needle roller to be positioned in the plane perpendicular with centre bore and adjacent with described spring.The effect of this one-way clutch makes gear described rotating shaft and pinion fixed thereon can only be driven to rotate together towards a direction, and now needle roller moves in rotating shaft and the narrower space of gear; When gear rotates in the opposite direction, described needle roller moves in described rotating shaft and the wider space of gear, and now needle roller and spring interface touch, and with gear inside be separated, cause gear to dally, and described rotating shaft non rotating.
Further, described impact disc mechanism also comprises and is arranged on ball bearing on V-type axle and gear wheel, be set on the spring between described gear wheel and impact disc on V-type axle, pad and steel ball circle are set between described spring and impact disc, described impact disc inside arranges several steel ball, be connected with V-type axle by described steel ball, impact disc is positioned at described V-type axle foremost, and described steel ball circle is arranged to reduce friction.
The rotating shaft of above-mentioned installation one-way clutch arranges pinion, described pinion is meshed with the gear wheel be arranged on V-type axle, axis of rotation drives pinion to rotate, and because pinion engages with gear wheel, thus drives all parts on above-mentioned V-type axle, impact disc and axle to rotate together.
Preferably, the surface of described impact disc arranges two projections, and described two raised position are just relative, and be conducive to balance dead weight when impact disc rotates, make it evenhanded, rotating speed is faster.
Knock above-mentioned impact when impact disc rotates by the projection on its surface and refer to tail end, can stop operating, now because the energy of described V-type axle can not abrupt release, also to be rotated further, now under the V-type groove effect that described V-type axle is relative with two that impact disc is arranged, described rotating shaft and impact disc relatively rotate, impact disc retreats simultaneously, after the projection of impact disc and impact refer to mutually to throw off, complete one-shot, the now spring of impact disc on V-type axle, under the effect of two relative V-type grooves and inner steel ball, accelerate to original direction again to rotate at once, impact disc moves forward rapidly simultaneously, the projection of impact disc and impact is made to refer to that tail end contacts again, start second time to impact, to go round and begin again like this function of impact.
Further, described umbrella gear mechanism comprises the bevel gear shaft be connected by ball bearing with gear, and engages with described bevel gear shaft and the perpendicular umbrella tooth in direction, and described umbrella tooth is positioned on described output shaft.
Described impact refers to arrange the O type circle sealed between output shaft.
Further, the surface of described output shaft is provided with the installing hole of mounting limit steel ball, stationary balls and key, and being connected in the bottom of output shaft has sliding sleeve spring, sliding sleeve frame and jump ring, and described output shaft connects drill bit by the associated components such as steel ball, jump ring.
Two features are the invention has the beneficial effects as follows, 1, symmetrical impact disc is utilized, friction during running, owing to being provided with two relative " V " type grooves on impact disc with V-type axle, when the resistance that impact disc is set, in two " V " type grooves steel ball effect under, impact disc can move axially, thus make impact disc and impact refer to throw off, the energy be stored in spring is converted into again kinetic energy and exports, machine efficiency is increased;
2, using one-way clutch, exporting impact energy when rotating forward, during reversion, impact disc and motor are thrown off, making operation become very simple, without the need to regulating any function button.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the schematic cross-section that in Fig. 1, one-way clutch combines with axle and gear.
Fig. 3 is the sectional view corresponding with Fig. 2.
Fig. 4 is the structural representation of V-type axle.
Fig. 5 is the structural representation of impact disc.
The motion state schematic diagram of two relative V-type grooves that Fig. 6 is steel ball in the present invention, impact disc and rotating shaft is arranged.
Detailed description of the invention:
In order to make creation characteristic of the present invention, technological means and reach object be easy to understand understand, set forth the present invention further below in conjunction with specific embodiment.
Embodiment:
Referring to Fig. 1, a kind of electric hammer, comprise motor 23, with the motor gear 24 of motor 23 close-fitting, the gear 26 be simultaneously meshed with motor gear 24 and gear 21, motor gear 24 can driven gear 26 and gear 21 rotate simultaneously.Also comprise middle cover 25, two bearings 22 being connected corresponding to gear 26 and gear 21, the rotating shaft 28 be connected by one-way clutch with gear 26, be arranged on the back-up ring 27 between gear 26 and rotating shaft 28 and ball bearing 20, described one-way clutch is made up of the needle roller 29 be arranged in rotating shaft 28 and spring 30, the end socket pinion 31 of rotating shaft 28, gear 26 drives rotating shaft 28 and the pinion 31 be fixed in rotating shaft 28 rotates together.Gear 21 parallels with gear 26 position, and gear 21 connects bevel gear shaft 19 by another ball bearing 20.
Referring to Fig. 2 and Fig. 3, one-way clutch is in rotating shaft 28 position milling plane corresponding with gear 26, makes a call to a hole, put into wire spring 30 in hole at the center of vertical plane, wire spring 30 two is no more than the external diameter of rotating shaft 28, puts needle roller 29 and realizes one-way clutch.
When gear 26 rotates counterclockwise, gear 26 is engaged with rotating shaft 28, drives rotating shaft 28 to rotate;
When gear 26 rotates clockwise, needle roller 29 is spacing by spring 30, be in gap maximum near, gear 26 and rotating shaft 28 are separated from, and gear 26 and rotating shaft 28 can not be engaged one and run up, and gear 26 dallies.
Wherein, rotating shaft 28 to be connected with a joggle the in-house gear wheel 33 of impact disc by the pinion 31 on it, the side of gear wheel 33 is connected ball bearing 32, opposite side is provided with V-type axle 34, be set on the spring 36 on V-type axle 34, the pad 37 be connected with bottom spring 36, steel ball circle 4, impact disc 3 and be arranged at steel ball 2, the oiliness bearing 1 of its inside.Rotating shaft 28 rotation driving pinion 31 rotates, and because pinion 31 is meshed with gear wheel 33, and then drives all parts on gear wheel 33, V-type axle 34 and axle to rotate together.
The bevel gear shaft 19 that gear 21 connects is by engaging with umbrella tooth 9, and then the impact of connection and the 21 perpendicular placements in gear direction refers to 5 and output shaft 12, impact refers to that 5 are assemblied in output shaft 12 and can rotate freely and move, described impact refers to that 5 tail ends are positions that above-mentioned impact disc 3 rat beats, and front end is the position of percussive drill bit.
Described impact refers to be provided with the O type circle 6 sealed between 5 and output shaft 12, also comprises oiliness bearing 7, jump ring 8, umbrella tooth 9 and ball bearing 10, is reached the object being connected and impacting and refer to 5 and output shaft 12 by these parts organic assembling.The surface of output shaft 12 is provided with the installing hole of mounting limit steel ball 13, stationary balls 15 and key 14 respectively, being connected in the bottom of output shaft 12 has sliding sleeve frame 17, is arranged on sliding sleeve spring on sliding sleeve frame 17 16 and jump ring 18, and described output shaft 12 connects drill bit by the associated components such as steel ball, jump ring 18.
Motor 23 rotates through motor gear 24 and drives the gear 21 be meshed and the bevel gear shaft 19 of connection to rotate, be meshed with umbrella tooth 9 by bevel gear shaft 19, and then drive the output shaft 12 installing drill bit to rotate, as long as the rotating of motor 23 energy, output shaft 12 just realizes rotating.
Operation principle of the present invention is, motor 23 exports and turns clockwise driven gear 26 when rotating, and needle roller 29 is spacing by spring 30, be in gap maximum near, gear 26 and rotating shaft 28 are separated from, and gear 26 and rotating shaft 28 can not be engaged one and run up, and gear 26 dallies.
When motor 23 exports and is rotated counterclockwise, gear 26 is engaged with rotating shaft 28, and drive the pinion 31 on rotating shaft 28 and axle to rotate, pinion 31 engages with gear wheel 33, and then drives all parts on V-type axle 34 and axle to operate together.
Referring to Fig. 1, Fig. 4, Fig. 5 and Fig. 6, knock above-mentioned impact when impact disc 3 rotates by the projection on its surface and refer to 5 tail ends, can stop operating, now because the energy of described V-type axle 34 can not abrupt release, also to be rotated further, V-type groove 341 now on described V-type axle 34 is with under V-type groove 301 acting in conjunction on impact disc 3, described rotating shaft 28 and impact disc 3 relatively rotate, impact disc 3 retreats simultaneously, when the projection of impact disc 3 and impact refer to 5 mutually throw off after, complete one-shot, the now spring 36 of impact disc 3 on V-type axle, under the effect of two relative V-type grooves and inner steel ball 2, accelerate to original direction again to rotate at once, impact disc moves forward rapidly simultaneously, the projection of impact disc 3 and impact are referred to, and 5 tail ends contact again, start second time to impact, to go round and begin again like this function of impact.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (7)
1. an electric hammer, comprise motor and be arranged on the motor gear in motor, it is characterized in that, described motor to be connected with a joggle two groups of gears by motor gear, one group of gear connects a rotating shaft by one-way clutch, described one-way clutch is arranged in described rotating shaft, described rotating shaft also connects impact disc mechanism by gears meshing, described impact disc mechanism comprises V-type axle and impact disc, the surface of described impact disc arranges projection, described V-type axle and impact disc all arrange V-type groove, and two V-type grooves are positioned opposite;
Another group gear Connectable umbrella gear mechanism, connected by umbrella gear mechanism and refer to and output shaft with the impact of the perpendicular placement in gear direction, described impact refers to be assemblied in output shaft and can rotate freely and move, described impact refers to that tail end is the position that above-mentioned impact disc rat beats, and front end is the position of percussive drill bit;
Described one-way clutch is made up of needle roller and spring, and described spring inserts in the centre bore of above-mentioned rotating shaft, and described needle roller to be positioned in the plane perpendicular with centre bore and adjacent with described spring;
The surface of described output shaft is provided with the installing hole of mounting limit steel ball, stationary balls and key, and being connected in the bottom of output shaft has sliding sleeve spring, sliding sleeve frame and jump ring.
2. a kind of electric hammer according to claim 1, is characterized in that, arranges middle cover, also arrange two bearings in described middle cover between described motor and above-mentioned two groups of gears, is connected respectively with described two groups of gears.
3. a kind of electric hammer according to claim 1, it is characterized in that, described impact disc mechanism also comprises and is arranged on ball bearing on V-type axle and gear wheel, be set on the spring between described gear wheel and impact disc on V-type axle, arrange pad and steel ball circle between described spring and impact disc, described impact disc inside arranges several steel ball;
The rotating shaft of above-mentioned installation one-way clutch arranges pinion, and described pinion is meshed with the gear wheel be arranged on V-type axle.
4. a kind of electric hammer according to claim 1, is characterized in that, the surface of described impact disc arranges two projections, and described two raised position are just relative.
5. a kind of electric hammer according to claim 1, is characterized in that, described umbrella gear mechanism comprises the bevel gear shaft be connected by ball bearing with gear, and engages with described bevel gear shaft and the perpendicular umbrella tooth in direction, and described umbrella tooth is positioned on described output shaft.
6. a kind of electric hammer according to claim 1, is characterized in that, described impact refers to arrange the O type circle sealed between output shaft.
7. a kind of electric hammer according to claim 1, is characterized in that, the in-house V-type axle of described impact disc and impact disc, umbrella gear mechanism and the impact be connected refer to be arranged in gear-box with output shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110405108.5A CN102554878B (en) | 2011-12-08 | 2011-12-08 | A kind of electric hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110405108.5A CN102554878B (en) | 2011-12-08 | 2011-12-08 | A kind of electric hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102554878A CN102554878A (en) | 2012-07-11 |
| CN102554878B true CN102554878B (en) | 2016-04-20 |
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ID=46402170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110405108.5A Expired - Fee Related CN102554878B (en) | 2011-12-08 | 2011-12-08 | A kind of electric hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102554878B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942762A (en) * | 2015-06-05 | 2015-09-30 | 吴志明 | Electric hammer |
| CN112221570B (en) * | 2020-09-30 | 2021-10-29 | 莱芜职业技术学院 | Double-mode electric crushing grinder |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1120199A2 (en) * | 2000-01-28 | 2001-08-01 | Makita Corporation | Hydraulic impulse rotary tool |
| CN201064893Y (en) * | 2007-07-13 | 2008-05-28 | 徐科 | Multifunctional electric hammer |
| CN202378014U (en) * | 2011-12-08 | 2012-08-15 | 宁波捷美进出口有限公司 | Electric hammer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3678965B2 (en) * | 2000-02-04 | 2005-08-03 | 株式会社マキタ | Rotating hammer tool |
| JP2002254336A (en) * | 2001-03-02 | 2002-09-10 | Hitachi Koki Co Ltd | Power tool |
| DE10261030A1 (en) * | 2002-12-24 | 2004-07-08 | Robert Bosch Gmbh | Rotary Hammer |
-
2011
- 2011-12-08 CN CN201110405108.5A patent/CN102554878B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1120199A2 (en) * | 2000-01-28 | 2001-08-01 | Makita Corporation | Hydraulic impulse rotary tool |
| CN201064893Y (en) * | 2007-07-13 | 2008-05-28 | 徐科 | Multifunctional electric hammer |
| CN202378014U (en) * | 2011-12-08 | 2012-08-15 | 宁波捷美进出口有限公司 | Electric hammer |
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| CN102554878A (en) | 2012-07-11 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20161208 |
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| CF01 | Termination of patent right due to non-payment of annual fee |