CN101961796A - Power output mechanism of electric tool - Google Patents
Power output mechanism of electric tool Download PDFInfo
- Publication number
- CN101961796A CN101961796A CN 201010278045 CN201010278045A CN101961796A CN 101961796 A CN101961796 A CN 101961796A CN 201010278045 CN201010278045 CN 201010278045 CN 201010278045 A CN201010278045 A CN 201010278045A CN 101961796 A CN101961796 A CN 101961796A
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- Prior art keywords
- housing
- electric tool
- cover
- output shaft
- ratchet wheel
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- 230000001788 irregular Effects 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000004663 powder metallurgy Methods 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 4
- 238000009527 percussion Methods 0.000 description 4
- 238000000748 compression moulding Methods 0.000 description 3
- 230000002045 lasting effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
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Abstract
The invention discloses a power output mechanism of an electric tool, comprising an output shaft, a bearing sleeve, a fixed ratchet wheel, an output gear and a spring, wherein continuous impact of the electric tool to a workpiece in the axial direction can be formed by continuous meshing and separation of irregular structures on the fixed ratchet wheel and the output gear, so that the working efficiency of the electric tool is improved. The power output mechanism has the advantages of compact structure, small vibration and high working efficiency.
Description
Technical field
The present invention relates to a kind of power take-off mechanism, be specifically related to a kind of power take-off mechanism of electric tool.
Background technology
Percussion drill is a kind of electric tool that can rotate and be with impact.Percussion drill is directly to transmit the power of reciprocal hammering to drill bit by transmission mechanism, thereby the power take-off mechanism of electric tool, not only to provide rotation, also need provide continual impulsive force, for being used on hand-held hammering drill, described power take-off mechanism also needs compact conformation, and vibrates little.
Chinese patent " 94241690.6 ", patent name is " transmission mechanism of hand-held electric impact drill ", disclose " a kind of transmission mechanism of hand-held electric impact drill; comprise motor, motor rotating shaft, rotating shaft driven gear, be fixed on the mandrel on the gear; the front end of described motor is provided with division board, and the front end of division board is connected with gear-box; Be provided with the bearing location between described rotating shaft and the division board, rotating shaft is passed division board and is stretched in the gear-box; Be provided with axle sleeve location between described mandrel and the gear-box, mandrel passes gear-box and is connected with drill chuck, and this structure has precision height, noise is low, the life-span is grown advantage." but the transmission mechanism of this structure does not provide lasting impulsive force.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming of the prior art, a kind of compact conformation is provided, vibrate the power take-off mechanism of little electric tool.
The power take-off mechanism of a kind of electric tool of the present invention comprises
---output shaft, can move in the axial direction, an end of described output shaft is installed in the bearing holder (housing, cover) by bearing holder (housing, cover), and an end connects drill bit;
---bearing holder (housing, cover), two axis holes are arranged, output shaft bearing is placed in the clutch shaft bearing hole, and second dead eye is placed bearing of input shaft; The one side of described bearing holder (housing, cover) is near a circle dentalation is arranged around the output shaft bearing hole;
---fixed ratchet wheel, an end face has the dentalation that matches with bearing holder (housing, cover), after bearing holder (housing, cover) cooperates, is sleeved on the output shaft, and the other end of fixed ratchet wheel has irregular structure;
---output gear, be fixed on the output shaft, an end face has the irregular structure that matches with ratchet;
---spring, be sleeved on the output shaft, between output gear and fixed ratchet wheel,, make the irregular structure surface of output gear and the irregular surface of fixed ratchet wheel produce contact and the action that separates by the compression of spring.
In a preferred embodiment of the invention, described output gear is a helical gear.
In a preferred embodiment of the invention, described bearing holder (housing, cover) thickness is made hollow-core construction, by the reinforcement proof strength.
In a preferred embodiment of the invention, the irregular structure of described fixed ratchet wheel and output gear is that a circle is the structure that fan-shaped height rises and falls.
In a preferred embodiment of the invention, described fixed ratchet wheel is by the powder metallurgy method manufacturing.
In a preferred embodiment of the invention, described output gear is by the powder metallurgy method manufacturing.
In a preferred embodiment of the invention, described output shaft is installed in an end of bearing holder (housing, cover), and it is coniform that axle head is.
In a preferred embodiment of the invention, connect an end of drill bit, in the axle individual screwed hole is arranged, the axle outer surface has screw thread.
The present invention is work like this, and when drill bit was pressed on the workpiece, owing to be subjected to the reaction force of workpiece, drill bit, output shaft, output gear were meshed the irregular portion branch that move backward together until output gear and fixed ratchet wheel.Because it is moving that output gear is not stall under the ordering about of motor, thereby output gear can not keep engagement with fixed ratchet wheel all the time, and the state of meeting escape engagement, will form drill bit in the axial direction to the lasting impact of workpiece in so continuous engagement with breaking away from, thereby to have improved the operating efficiency of drill bit.
The present invention compares its advantage with the prior art scheme:
(1), an end face of output gear has the irregular structure that matches with fixed ratchet wheel, makes output gear not only play the effect of deceleration, also and fixed ratchet wheel cooperate continual impulsive force be provided, thereby the operating efficiency of raising percussion drill.
(2), power output shaft and power input shaft are installed in parts---on the bearing holder (housing, cover), reduce by parts like this, compact conformation, cost reduction.
(3), described bearing holder (housing, cover) makes hollow-core construction, uses the reinforcement proof strength, saves cost.
(4), output gear is angular gear, helical gear can improve the registration of gears engaged, makes gear drive steady, reduces noise.
(5), the structure of described output gear and fixed ratchet wheel is comparatively complicated, with a compression moulding manufacturing of powder metallurgy, can cut down finished cost.
Description of drawings
Fig. 1 is a kind of embodiment mounting structure schematic diagram of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is a kind of structural representation of output shaft;
Fig. 4 is the Z-Z cutaway view of Fig. 3;
Fig. 5 is a kind of structural representation of bearing holder (housing, cover);
Fig. 6 is the schematic rear view of Fig. 5;
Fig. 7 is the structural representation of fixed ratchet wheel;
Fig. 8 is the front elevational schematic of Fig. 7;
Fig. 9 is the front elevational schematic of output gear;
Figure 10 is the E-E cutaway view of Fig. 9.
Wherein, 1 is output shaft, and 2 is bearing holder (housing, cover), and 3 is fixed ratchet wheel, 4 is gear, and 5 is spring, and 6 is output shaft bearing, 7 is bearing of input shaft, and 8 is axle sleeve, and 11 is connecting axle bearing sleeve one end, 12 for connecting drill bit one end, and 13 is screwed hole, and 21 is the bearing of input shaft hole, 22 is reinforcement, and 23 is the output shaft bearing hole, and 24 is the dentalation on the bearing holder (housing, cover), 31 is the irregular structure on the fixed ratchet wheel end face, and 32 is the dentalation of fixed ratchet wheel end face, and 41 is the irregular structure on the output gear.
The specific embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby protection scope of the present invention is made more explicit defining so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that.
In embodiments of the present invention, be structure and the advantage that example illustrates power take-off mechanism of the present invention with the hand-held hammering drill, but power take-off mechanism provided by the invention is equally applicable to electric tools such as hand-held electric hammer.
As Fig. 1 in conjunction with shown in Figure 2, the export structure of present embodiment comprises output shaft 1, bearing holder (housing, cover) 2, fixed ratchet wheel 3, output gear 4, spring 5, output shaft bearing 6, bearing of input shaft 7, axle sleeve 8, described bearing holder (housing, cover) 2 has two dead eyes, one 6, one of output shaft bearings are installed bearing of input shaft 7 is installed.Fixed ratchet wheel 3 is connected with bearing holder (housing, cover) 2 engages fixed by dentalation, is sleeved on the output shaft 1 again, and spring 5 is arranged between fixed ratchet wheel 3 and the output gear.
As Fig. 3 in conjunction with shown in Figure 4, output shaft 1, the one end connecting axle bearing sleeve of present embodiment, end face 11 is coniform; The other end connects drill jig and drill bit, in 12 at this end individual screwed hole 13 is arranged, and an outer surface has screw thread.
In conjunction with shown in Figure 6, the bearing holder (housing, cover) 2 of present embodiment has two dead eyes as Fig. 5,23, one all dead eyes 21 of input in an output shaft bearing hole.The one side of described bearing holder (housing, cover) is near a circle dentalation 24 is arranged around the output shaft bearing hole; Bearing holder (housing, cover) thickness is made hollow-core construction, by reinforcement 22 proof strengths.
As Fig. 7 in conjunction with shown in Figure 8, one end face of the fixed ratchet wheel 3 of present embodiment has irregular structure 31, described irregular structure is the structure that the height that is fan-shaped rises and falls, and there is dentalation 32 other end, and the dentalation 24 on described dentalation 32 and the bearing holder (housing, cover) matches fixing.
In conjunction with shown in Figure 10, the output gear 4 of present embodiment is an angular gear as Fig. 9, and an end face has irregular structure 41, and the irregular structure 31 on described irregular structure 41 and the fixed ratchet wheel 3 matches.
The structure of described output gear and fixed ratchet wheel is comparatively complicated, with a compression moulding manufacturing of powder metallurgy, can cut down finished cost.
The present invention is work like this, and when drill bit was pressed on the workpiece, owing to be subjected to the reaction force of workpiece, drill bit, output shaft, output gear were meshed the irregular portion branch that move backward together until output gear and fixed ratchet wheel.Because it is moving that output gear is not stall under the ordering about of motor, thereby output gear can not keep engagement with fixed ratchet wheel all the time, and the state of meeting escape engagement, will form drill bit in the axial direction to the lasting impact of workpiece in so continuous engagement with breaking away from, thereby to have improved the operating efficiency of drill bit.
The present invention compares its advantage with the prior art scheme:
(1), an end face of output gear has the irregular structure that matches with fixed ratchet wheel, makes output gear not only play the effect of deceleration, also and fixed ratchet wheel cooperate continual impulsive force be provided, thereby the operating efficiency of raising percussion drill.
(2), power output shaft and power input shaft are installed in parts---on the bearing holder (housing, cover), reduce by parts like this, compact conformation, cost reduction.
(3), described bearing holder (housing, cover) makes hollow-core construction, uses the reinforcement proof strength, saves cost.
(4), output gear is angular gear, helical gear can improve the registration of gears engaged, makes gear drive steady, reduces noise.
(5), the structure of described output gear and fixed ratchet wheel is comparatively complicated, with a compression moulding manufacturing of powder metallurgy, can cut down finished cost.
The above; it only is the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; variation or the replacement that can expect without creative work all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (8)
1. the power take-off mechanism of an electric tool is characterized in that, comprises
---output shaft, can move in the axial direction, an end of described output shaft is installed in the bearing holder (housing, cover) by bearing holder (housing, cover), and an end connects drill bit;
---bearing holder (housing, cover), two axis holes are arranged, output shaft bearing is placed in the clutch shaft bearing hole, and second dead eye is placed bearing of input shaft; The one side of described bearing holder (housing, cover) is near a circle dentalation is arranged around the output shaft bearing hole;
---fixed ratchet wheel, an end face has the dentalation that matches with bearing holder (housing, cover), after bearing holder (housing, cover) cooperates, is sleeved on the output shaft, and the other end of fixed ratchet wheel has irregular structure;
---output gear, be fixed on the output shaft, an end face has the irregular structure that matches with ratchet;
---spring, be sleeved on the output shaft, between output gear and fixed ratchet wheel,, make the irregular structure surface of output gear and the irregular surface of fixed ratchet wheel produce contact and the action that separates by the compression of spring.
2. the power take-off mechanism of a kind of electric tool according to claim 1, it is characterized in that: described output gear is a helical gear.
3. the power take-off mechanism of a kind of electric tool according to claim 2, it is characterized in that: described bearing holder (housing, cover) thickness is made hollow-core construction, by the reinforcement proof strength.
4. the power take-off mechanism of a kind of electric tool according to claim 3 is characterized in that: the irregular structure of described fixed ratchet wheel and output gear is that a circle is the structure that fan-shaped height rises and falls.
5. the power take-off mechanism of a kind of electric tool according to claim 4, it is characterized in that: described fixed ratchet wheel is by the powder metallurgy method manufacturing.
6. the power take-off mechanism of a kind of electric tool according to claim 4, it is characterized in that: described output gear is by the powder metallurgy method manufacturing.
7. according to the power take-off mechanism of the described a kind of electric tool of one of claim 1～6, it is characterized in that: described output shaft is installed in an end of bearing holder (housing, cover), and it is coniform that axle head is.
8. the power take-off mechanism of a kind of electric tool according to claim 7 is characterized in that: connect an end of drill bit, in the axle individual screwed hole is arranged, an outer surface has screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010278045 CN101961796A (en) | 2010-09-10 | 2010-09-10 | Power output mechanism of electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010278045 CN101961796A (en) | 2010-09-10 | 2010-09-10 | Power output mechanism of electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101961796A true CN101961796A (en) | 2011-02-02 |
Family
ID=43514934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010278045 Pending CN101961796A (en) | 2010-09-10 | 2010-09-10 | Power output mechanism of electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101961796A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715206A (en) * | 2016-04-13 | 2016-06-29 | 宁波市德霖机械有限公司 | Impacting type ice driller |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6213222B1 (en) * | 2000-01-06 | 2001-04-10 | Milwaukee Electric Tool Corporation | Cam drive mechanism |
| US6550546B2 (en) * | 1999-06-03 | 2003-04-22 | One World Technologies, Inc. | Spindle lock and chipping mechanism for hammer drill |
| US6688406B1 (en) * | 2003-01-29 | 2004-02-10 | Mobiletron Electronics Co., Ltd. | Power tool having a function control mechanism for controlling operation in one of rotary drive and hammering modes |
| US20050194165A1 (en) * | 2004-03-05 | 2005-09-08 | Hitachi Koki Co., Ltd. | Impact drill |
| CN1907654A (en) * | 2001-03-02 | 2007-02-07 | 日立工机株式会社 | Power tool |
| CN101752940A (en) * | 2008-11-28 | 2010-06-23 | 台达电子工业股份有限公司 | Fan, motor and bearing sleeve |
| CN201808051U (en) * | 2010-09-10 | 2011-04-27 | 常熟市迅达粉末冶金有限公司 | Power output mechanism for electric power tool |
-
2010
- 2010-09-10 CN CN 201010278045 patent/CN101961796A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6550546B2 (en) * | 1999-06-03 | 2003-04-22 | One World Technologies, Inc. | Spindle lock and chipping mechanism for hammer drill |
| US6213222B1 (en) * | 2000-01-06 | 2001-04-10 | Milwaukee Electric Tool Corporation | Cam drive mechanism |
| CN1907654A (en) * | 2001-03-02 | 2007-02-07 | 日立工机株式会社 | Power tool |
| US6688406B1 (en) * | 2003-01-29 | 2004-02-10 | Mobiletron Electronics Co., Ltd. | Power tool having a function control mechanism for controlling operation in one of rotary drive and hammering modes |
| US20050194165A1 (en) * | 2004-03-05 | 2005-09-08 | Hitachi Koki Co., Ltd. | Impact drill |
| CN101752940A (en) * | 2008-11-28 | 2010-06-23 | 台达电子工业股份有限公司 | Fan, motor and bearing sleeve |
| CN201808051U (en) * | 2010-09-10 | 2011-04-27 | 常熟市迅达粉末冶金有限公司 | Power output mechanism for electric power tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715206A (en) * | 2016-04-13 | 2016-06-29 | 宁波市德霖机械有限公司 | Impacting type ice driller |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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Application publication date: 20110202 |