CN103009343B - Electric tool - Google Patents
Electric tool Download PDFInfo
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- CN103009343B CN103009343B CN201210498697.0A CN201210498697A CN103009343B CN 103009343 B CN103009343 B CN 103009343B CN 201210498697 A CN201210498697 A CN 201210498697A CN 103009343 B CN103009343 B CN 103009343B
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- output shaft
- main shaft
- electric tool
- hammer
- flexible member
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Abstract
A kind of electric tool, comprise housing, power part, reducing gear, beater mechanism, executing agency and damping, electric tool of the present invention by arranging damping between main shaft and output shaft, and damping is positioned at the accepting hole of main shaft or output shaft, damping comprise support element and with the flexible member supporting element and be connected, and element will be supported be connected with flexible member press fit is integral, the automatic adjustment of flexible member is utilized to make the gap between output shaft and housing be always zero, therefore avoid and produce strike note in the process of rocking electric tool, and be point cantact owing to supporting element and main shaft or output shaft, decrease the friction between damping and main shaft or output shaft, thus ensure the rotational efficienty of output shaft, electric tool structure of the present invention is simple, compact, production cost is low.
Description
Technical field
The present invention relates to a kind of electric tool, particularly a kind of electric tool impacting class.
Background technology
Impact in type electric tool product at impact wrench, impact screwdriver, percussion drill etc., be stuck to prevent output shaft thus affect rotational efficienty, simultaneously because the restriction of level of processing cannot ensure to closely cooperate between output shaft assembly and gear box casing, main shaft, generally before and after output shaft, all pre-set certain vibration gap, for ensureing that output shaft high efficiency operates.Rock electric tool before and after ordinary consumer is all habitual when buying, and strike note can be produced owing to coordinating during vibration before and after not tight output shaft, thus allowing consumer think by mistake there are quality problems and abandon buying in product.
Settling mode general at present has two kinds, a kind of is improve the vibration gap before and after machining accuracy reduction output shaft, itself and main shaft and gear box casing are closely cooperated, although this kind of mode solves the problem of vibration before and after output shaft and can ensure that output shaft rotates efficiently, but its processing cost is high, and need higher manufacture level of processing; Another kind pads buffering spacer between main shaft and output shaft or between output shaft and gear box casing, this kind of mode also can solve the problem of vibration before and after output shaft, and production cost is low, but due to output shaft and buffering spacer close contact, it brings larger frictional resistance will inevitably to the rotation of output shaft, thus affects the rotational efficienty of output shaft.
Summary of the invention
For solving the problem, being necessary to provide one can prevent vibration before and after output shaft and less, lower-cost electric tool is affected on output shaft rotation efficiency.
A kind of electric tool, comprise housing, power part, reducing gear, beater mechanism, executing agency and damping, described housing comprises procapsid and back casing, procapsid and back casing are interconnected, described power part comprises the motor being arranged on enclosure interior, the clutch end of described motor is connected with the power intake of described reducing gear, the clutch end of described reducing gear connects described beater mechanism, the output of described beater mechanism is connected with executing agency, described beater mechanism comprises main shaft, output shaft, hammer body and hammer anvil, described tup sheath is contained on main shaft, described hammer body can rotate and move along axis direction centered by the axis of main shaft, described hammer anvil is arranged on output shaft, one end of one of them of described main shaft and output shaft is provided with the protuberance extended vertically, another one end is provided with the groove coordinated with described protuberance vertically, described output shaft realizes power transmission by hammer body with coordinating of hammer anvil with between main shaft, it is characterized in that: groove or protuberance are provided with accepting hole, damping comprise a flexible member and one support element, described flexible member one end supports in described accepting hole, the other end abuts with the described element that supports, the described element that supports supports with the groove or protuberance not offering accepting hole.
Preferably, described flexible member is spring, and supporting element is steel ball, and described flexible member is in compressive state all the time in the whole course of work.
Preferably, described in support for matched in clearance between element and accepting hole, and support element diameter and be greater than the vibration gap between output shaft and procapsid and the vibration gap sum between output shaft and main shaft.
Preferably, described reducing gear is planetary gear reducing mechanism.
Preferably, described protuberance is arranged on described output shaft, and described accepting hole is arranged on the protuberance of output shaft.
Preferably, described groove is arranged on described main shaft, and described accepting hole is arranged in the groove of main shaft.
Preferably, described main shaft is connected with reducing gear, and one end that hammer body is adjacent with hammer anvil is provided with the first claw coordinated with hammer anvil, described hammer anvil is provided with the second claw matched with the first claw.
Preferably, described beater mechanism also comprises steel ball and spring, described main shaft comprises axis body and is fixedly mounted on two parallel baffles of axis body one end, described main shaft is formed with the V-type groove placing steel ball, hammer body is the column construction of hollow, and hammer body comprises the driving section be sleeved on axis body, and hammer body is formed with spring placed cavity away from the inside, one end of hammer anvil, one end of described spring supports in spring placed cavity, and the other end is held in the baffle plate near hammer body side.
Preferably, described driving section includes backstop mouth, and described backstop mouth is arranged on the rear of steel ball in the axial direction.
Preferably, described output shaft is arranged on the front in described main shaft rotation direction, and the axis of output shaft is consistent with the axis of main shaft; The front portion of described output shaft is formed with the placed cavity installing executing agency, and described hammer anvil is arranged on output shaft one end near main shaft, and described hammer anvil is supported on procapsid by output shaft is rotatable.
Electric tool of the present invention by arranging damping between main shaft and output shaft, and damping is positioned at the accepting hole of main shaft or output shaft, damping comprise support element and with the flexible member supporting element and be connected, and element will be supported be connected with flexible member press fit is integral, the automatic adjustment of flexible member is utilized to make the gap between output shaft and housing be always zero, therefore avoid and produce strike note in the process of rocking electric tool, and be point cantact owing to supporting element and main shaft or output shaft, decrease the friction between damping and main shaft or output shaft, thus ensure the rotational efficienty of output shaft, electric tool structure of the present invention is simple, compact, production cost is low.
Accompanying drawing explanation
Fig. 1 is the perspective view of electric tool of the present invention;
Fig. 2 is the partial sectional view of electric tool first embodiment of the present invention;
Fig. 3 is partial view when first claw separates with the second claw in electric tool first embodiment of the present invention;
Fig. 4 is partial view when first claw coordinates with the second claw in electric tool first embodiment of the present invention;
Fig. 5 is the partial sectional view of electric tool second embodiment of the present invention;
Fig. 6 is the three-dimensional exploded view of electric tool subelement of the present invention.
Detailed description of the invention
In order to more understand technology contents of the present invention, institute's accompanying drawings is coordinated to be described as follows especially exemplified by detailed description of the invention.
Please refer to Fig. 1 and Fig. 2, electric tool 10 in first embodiment of the invention, comprise housing 11, power part 12, reducing gear 13, beater mechanism 14, executing agency 15 and damping 16, for impact screwdriver, electric tool 10 is described in detail in the present embodiment.
Housing 11 comprises procapsid 110 and back casing 111, and procapsid 110 and back casing 111 are spirally connected mutually.Be appreciated that and also can adopt the connected modes such as clamping between procapsid 110 and back casing 111, as long as procapsid 110 and back casing 111 can be connected into an entirety and easy-to-mount connected mode all should belong to protection scope of the present invention.
Power part 12 is connected with reducing gear 13, with by power transmission to reducing gear 13, it comprises the motor (not shown) being arranged on housing 11 inside, and the clutch end of motor is connected with the power intake of reducing gear 13.
Please refer to Fig. 3, reducing gear 13 is for the power transmission that provided by power part 12 to beater mechanism 14, and its clutch end is connected with beater mechanism 14.In the present embodiment, reducing gear 13 is planetary gear reducing mechanism, it comprises planetary gear 130 and planet carrier 131, in order to keep the steady of transmission, planetary gear 130 is two, and two planetary gears 130 are symmetrically distributed in planet carrier 131, planet carrier 131 is fixed in housing 11, planetary gear 130 connects with the power output shaft 120 of motor, the power output shaft 120 of motor is provided with the gear connection 1201 be meshed with planetary gear 130, planetary gear 130 rotation under the drive of power output shaft 120, and revolve round the sun along the power output shaft 120 of planet carrier 131 around motor.Be appreciated that; reducing gear 13 is not limited to planetary gear reducing mechanism, also can be other reducing gears, such as V belt translation reducing gear; turbine and worm decelerators etc., as long as the general reducing gear that can realize the slowing effect of motor all should belong to protection scope of the present invention.
Beater mechanism 14 comprises main shaft 140, output shaft 141, hammer body 142, hammer anvil 143, steel ball 144 and spring 145.
Fig. 2 and Fig. 3 please be refer again to, main shaft 140 comprises axis body 1400 and two parallel baffles 1401, two parallel baffles 1401 are fixedly mounted on axis body 1400 one end near reducing gear 13, hammer body 142 is arranged on axis body 1400 one end away from reducing gear 13, and main shaft 140 is connected with the clutch end of reducing gear 13.Two parallel baffles 1401 surround the circumferential slot 1402 defining and hold planetary gear 130, planetary gear 130 rotation in circumferential slot 1402 with axis body 1400, and drive main shaft 140 to revolve round the sun along planet carrier 131.Be connected by latch 1403 between planetary gear 130 with two parallel baffles 1401 in the present embodiment, thus drive the rotation of main shaft 140 by the rotation of planetary gear 130.In the present invention, two parallel baffles 1401 are provided with the pilot hole corresponding with planetary gear 1300 centre bore, and latch 1403 runs through in the through hole be made up of centre bore and pilot hole.Axis body 1400 is also formed with the V-type groove 1404 placing steel ball 144, axis body 1400 axially offers groove 1405 away from one end of reducing gear 13.
Hammer body 142 can rotate and move along axis direction centered by the axis of main shaft 140, hammer body 142 is the cylindrical structural of hollow, hammer body 142 comprises the driving section 1420 be sleeved on axis body 1400, hammer body 142 one end is provided with the first claw 1421 coordinated with hammer anvil 143, and hammer body 142 other end inside is formed with spring placed cavity 1422.
Driving section 1420 is step structure, and driving section 1420 comprises the backstop mouth 1423 of inclination, and backstop mouth 1423 is arranged on the side of steel ball 144 near reducing gear 13.Main shaft 140 is by being arranged on steel ball 144 in V-type groove 1404 and coordinating power transmission to hammer body 142 between backstop mouth 1423.In the side of backstop mouth 1423 away from reducing gear 13, between driving section 1420 and main shaft 140, form the passage 1424 for hammer body 142 movement.Hammer body 142 is on main shaft 140 in the axial direction in the process of reducing gear 13, and passage 1424 can make steel ball 144 pass through; In the process of hammer body 142 in the axial direction away from reducing gear 13 on main shaft 140, backstop mouth 1423 is by playing position-limiting action with coordinating of steel ball 144, so that cooperatively interacting between the first claw 1421 and hammer anvil 143.
Spring 145 one end is connected on the bottom surface of spring placed cavity 1422, and the other end offsets, for regulating hammer body 142 in the position of axis direction with the baffle plate 1401 near hammer body 142 side.
Output shaft 141 and main shaft 140 are coaxially arranged, and contiguous main shaft 140 is provided with one end of hammer body 142.One end of output shaft 141 is formed with the placed cavity 1410 for installing executing agency 15, hammer anvil 143 is set with outside the other end of output shaft 141, hammer anvil 143 is arranged in housing 11, hammer anvil 143 is rotatable under the drive of output shaft 141 to be supported on procapsid 110, hammer anvil 143 is provided with the second claw 1431 matched with the first claw 1421 of hammer body 142, between output shaft 141 with main shaft 140, realizes power transmission by hammer body 142 with coordinating of hammer anvil 143.Output shaft 141 is axially extended with protuberance 1411 near one end of hammer body 142.
Please refer to Fig. 3 and Fig. 4, in course of normal operation, motor by planetary gear 130 that power output shaft 120 connects by power transmission to main shaft 140, main shaft 140 drives the hammer body 142 that it is arranged to rotate, hammer body 142 drives hammer anvil 143 to rotate by the first claw 1421 that it is arranged with coordinating of the second claw 1431 that hammer anvil 143 is arranged, thus drives output shaft 141 to rotate.First claw 1421 is that the second claw 1431 is the boss structure matched with flange at symmetrically arranged two flanges in hammer body 142 front end, and the second claw 1431 drives output shaft 141 to rotate about the axis.
When the load of executing agency 15 exceedes certain torque value, move in the direction of elastic force along axis direction to reducing gear 13 that hammer body 142 can overcome spring 145, first claw 1421 of hammer body 142 is separated with the second claw 1431 of hammer anvil 143, now hammer anvil 143 does not temporarily rotate, hammer body 142 is rotated further under the drive of main shaft 140, now on hammer body 142, the first claw 1421 partly overlaps with the second claw 1431 on hammer anvil 143 in rotation, after the first claw 1421 turns over certain angle, hammer body 142 can move along axis direction to the direction away from reducing gear 13 under the effect of spring 145, until backstop mouth 1423 and the steel ball 144 be placed in V-type groove 1404 clamp mutually, the first claw 1421 now on hammer body 142 and the second claw 1431 on hammer anvil 143 are by clamping again, and the circumferential impulsive torque that generation one is larger instantaneously, thus complete impact.
Output shaft 141 is cooperatively interacted by the groove 1405 that protuberance 1411 that it is arranged and main shaft 140 are arranged, damping 16 is arranged between main shaft 140 and output shaft 141, it comprises flexible member 160 and supports element 161, accepting hole 1412 is offered in the protuberance 1411 of output shaft, flexible member 160 one end supports on accepting hole 1412 end face, the other end is connected with and supports element 161, supports element 161 and connects with groove 1405 bottom surface on main shaft 140.
Flexible member 160 is Compress Spring, support element 161 for steel ball, support between element 161 and accepting hole 1412 is matched in clearance, flexible member 160 is in compressive state all the time in the whole course of work, ensure that the gap between groove 1405 bottom surface supporting element 161 and main shaft 140 is always zero, thus solve the vibration between output shaft 141 and main shaft 140.For the ease of assembling, support element 161 diameter and be greater than the vibration gap in design between output shaft 141 and procapsid 110 axis and the vibration gap sum between output shaft 141 and main shaft 140 axis, because flexible member 160 is in compressive state, therefore can to supporting element 161 1 pressure in the axial direction, support element 161 to promote in the axial direction to closely cooperate between output shaft 141 and procapsid 110, thus also solve the vibration problem between output shaft 141 and procapsid 110.Owing to supporting element 161 for steel ball, supporting between element 161 and output shaft 141 is point cantact, therefore, it is possible to greatly reduce the friction between damping 16 and output shaft 141, ensures the rotational efficienty of output shaft.
Please refer to Fig. 5, as the electric tool 20 in the second embodiment of the present invention and the electric tool 10 in the first embodiment similar, comprise housing 21, power part 22, reducing gear 23, beater mechanism 24, executing agency 25 and damping 26, damping 26 also comprises flexible member 260 and supports element 261, its main distinction is that accepting hole 2412 is arranged in the protuberance 2405 of main shaft 240, flexible member 260 one end supports in accepting hole 2412, the other end with support element 261 and be connected, support element 261 to connect with the end face of the groove 2411 on output shaft 241.Same flexible member 260 adopts spring, supports element 261 and adopts and support element, its with the first embodiment in electric tool 10 when ensureing the rotational efficienty of output shaft, the front and back vibration of output shaft can be reduced, thus the noise of reduction vibration generation.
The above, just better embodiment of the present invention, the present invention is not limited to above-mentioned embodiment, be appreciated that, also the structure of output shaft and main shaft can be changed, protuberance is arranged on main shaft, output shaft is provided with the groove matched with protuberance, then accepting hole can be arranged in the protuberance of main shaft or in the groove of output shaft, then spring one end is supported in accepting hole, the other end of spring with support element and be connected, support element to connect with the groove floor of output shaft or the protuberance end face of main shaft, as long as it reaches technique effect of the present invention with identical means, all protection scope of the present invention should be belonged to.
Claims (9)
1. an electric tool, comprise housing, power part, reducing gear, beater mechanism, executing agency and damping, described housing comprises procapsid and back casing, procapsid and back casing are interconnected, described power part comprises the motor being arranged on enclosure interior, the clutch end of described motor is connected with the power intake of described reducing gear, the clutch end of described reducing gear connects described beater mechanism, the output of described beater mechanism is connected with executing agency, described beater mechanism comprises main shaft, output shaft, hammer body and hammer anvil, described tup sheath is contained on main shaft, described hammer body can rotate and move along axis direction centered by the axis of main shaft, described hammer anvil is arranged on output shaft, one end of one of them of described main shaft and output shaft is provided with the protuberance extended vertically, another one end is provided with the groove coordinated with described protuberance vertically, described output shaft realizes power transmission by hammer body with coordinating of hammer anvil with between main shaft, it is characterized in that: groove or protuberance are provided with accepting hole, damping comprise a flexible member and one support element, described flexible member one end supports in described accepting hole, the other end abuts with the described element that supports, the described element that supports supports with the groove or protuberance not offering accepting hole, described flexible member is in compressive state all the time in the whole course of work, describedly to support for matched in clearance between element and accepting hole, and support element diameter and be greater than the vibration gap between output shaft and procapsid and the vibration gap sum between output shaft and main shaft.
2. electric tool according to claim 1, is characterized in that: described flexible member is spring, and supporting element is steel ball.
3. electric tool according to claim 2, is characterized in that: described reducing gear is planetary gear reducing mechanism.
4. the electric tool according to claim 1 ~ 3 any one, is characterized in that: described protuberance is arranged on described output shaft, and described accepting hole is arranged on the protuberance of output shaft.
5. the electric tool according to claim 1 ~ 3 any one, is characterized in that: described groove is arranged on described main shaft, and described accepting hole is arranged in the groove of main shaft.
6. electric tool according to claim 1, is characterized in that: described main shaft is connected with reducing gear, and one end that hammer body is adjacent with hammer anvil is provided with the first claw coordinated with hammer anvil, described hammer anvil is provided with the second claw matched with the first claw.
7. electric tool according to claim 6, it is characterized in that: described beater mechanism also comprises steel ball and spring, described main shaft comprises axis body and is fixedly mounted on two parallel baffles of axis body one end, described main shaft is formed with the V-type groove placing steel ball, hammer body is the column construction of hollow, hammer body comprises the driving section be sleeved on axis body, hammer body is formed with spring placed cavity away from the inside, one end of hammer anvil, one end of described spring supports in spring placed cavity, and the other end is held in the baffle plate near hammer body side.
8. electric tool according to claim 7, is characterized in that: described driving section includes backstop mouth, and described backstop mouth is arranged on the rear of steel ball in the axial direction.
9. the electric tool according to claim 6 ~ 8 any one, is characterized in that: described output shaft is arranged on the front in described main shaft rotation direction, and the axis of output shaft is consistent with the axis of main shaft; The front portion of described output shaft is formed with the placed cavity installing executing agency, and described hammer anvil is arranged on output shaft one end near main shaft, and described hammer anvil is supported on procapsid by output shaft is rotatable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210498697.0A CN103009343B (en) | 2012-11-29 | 2012-11-29 | Electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210498697.0A CN103009343B (en) | 2012-11-29 | 2012-11-29 | Electric tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103009343A CN103009343A (en) | 2013-04-03 |
| CN103009343B true CN103009343B (en) | 2016-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210498697.0A Expired - Fee Related CN103009343B (en) | 2012-11-29 | 2012-11-29 | Electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103009343B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107498550B (en) * | 2017-08-30 | 2023-12-22 | 歌尔科技有限公司 | Transmission mechanism capable of automatically making close contact and robot |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1800803A2 (en) * | 2005-12-21 | 2007-06-27 | HILTI Aktiengesellschaft | Hand tool with a ratchet striking mechanism |
| CN101143440A (en) * | 2004-10-28 | 2008-03-19 | 株式会社牧田 | Electric power tool |
| CN101342693A (en) * | 2007-07-12 | 2009-01-14 | 苏州宝时得电动工具有限公司 | Power tool |
| CN101745664A (en) * | 2008-12-16 | 2010-06-23 | 罗伯特·博世有限公司 | Hand-held power tool |
| CN101786266B (en) * | 2009-01-27 | 2012-06-27 | 松下电工电动工具株式会社 | Rotary impact tool |
| CN102601420A (en) * | 2012-03-26 | 2012-07-25 | 南京久驰机电实业有限公司 | Electric tool with rotary impact function |
| CN203092500U (en) * | 2012-11-29 | 2013-07-31 | 南京德朔实业有限公司 | Electric tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012006101A (en) * | 2010-06-23 | 2012-01-12 | Makita Corp | Impact tool |
-
2012
- 2012-11-29 CN CN201210498697.0A patent/CN103009343B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101143440A (en) * | 2004-10-28 | 2008-03-19 | 株式会社牧田 | Electric power tool |
| EP1800803A2 (en) * | 2005-12-21 | 2007-06-27 | HILTI Aktiengesellschaft | Hand tool with a ratchet striking mechanism |
| CN101342693A (en) * | 2007-07-12 | 2009-01-14 | 苏州宝时得电动工具有限公司 | Power tool |
| CN101745664A (en) * | 2008-12-16 | 2010-06-23 | 罗伯特·博世有限公司 | Hand-held power tool |
| CN101786266B (en) * | 2009-01-27 | 2012-06-27 | 松下电工电动工具株式会社 | Rotary impact tool |
| CN102601420A (en) * | 2012-03-26 | 2012-07-25 | 南京久驰机电实业有限公司 | Electric tool with rotary impact function |
| CN203092500U (en) * | 2012-11-29 | 2013-07-31 | 南京德朔实业有限公司 | Electric tool |
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| Publication number | Publication date |
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| CN103009343A (en) | 2013-04-03 |
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Granted publication date: 20160427 Termination date: 20211129 |