CN203092500U - Electric tool - Google Patents
Electric tool Download PDFInfo
- Publication number
- CN203092500U CN203092500U CN 201220645237 CN201220645237U CN203092500U CN 203092500 U CN203092500 U CN 203092500U CN 201220645237 CN201220645237 CN 201220645237 CN 201220645237 U CN201220645237 U CN 201220645237U CN 203092500 U CN203092500 U CN 203092500U
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- Prior art keywords
- output shaft
- main shaft
- electric tool
- hammer
- axis
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Abstract
The utility model discloses an electric tool, comprising a casing, a power unit, a reducing mechanism, an impact mechanism, an execution mechanism and a damping mechanism. According to the electric tool, the damping mechanism is arranged between a main shaft and an output shaft, is located in the accommodating hole of the main shaft or the output shaft and comprises an abutting element and an elastic element which is connected with the abutting element and is assembled with the abutting element into whole connection through extrusion; a gap between the output shaft and the casing is always equal to zero through utilizing the automatic adjustment of the elastic element, so crash noise produced during the process of shaking the electric tool can be avoided; and as the abutting element is in point contact with the main shaft or the output shaft, the friction between the damping mechanism and the main shaft or the output shaft can be reduced, thus the rotation efficiency of the output shaft can be ensured. The electric tool is simple and compact in structure, and low in production cost.
Description
Technical field
The utility model relates to a kind of electric tool, particularly a kind of electric tool that impacts class.
Background technology
Impact in the type electric tool products at impact wrench, impact screwdriver, percussion drill etc., thereby influence rotational efficienty in order to prevent that output shaft is stuck, simultaneously since the restriction of level of processing can't guarantee to closely cooperate between output shaft assembly and gear box casing, the main shaft, the general moving gap of certain string that all pre-sets before and after output shaft is used to guarantee the running of output shaft high efficiency.Ordinary consumer all rocks electric tool before and after the habituation when buying, and because cooperation can produce strike note when closely output shaft front and back string is moving, thereby allow the consumer think that there are quality problems in product and abandon purchase by mistake.
General settling mode has two kinds at present, a kind of is to improve the moving gap of string that machining accuracy reduces the output shaft front and back, itself and main shaft and gear box casing are closely cooperated, though this kind mode has solved the moving problem of string before and after the output shaft and can guarantee that output shaft rotates efficiently, but its processing cost height, and need higher manufacturing level of processing; Another kind is to fill up buffering spacer between main shaft and the output shaft or between output shaft and the gear box casing, this kind mode also can solve the moving problem of output shaft front and back string, and production cost is low, but because output shaft closely contacts with buffering spacer, it brings bigger frictional resistance will inevitably for the rotation of output shaft, thereby influences the rotational efficienty of output shaft.
Summary of the invention
For addressing the above problem, be necessary to provide a kind of string that can prevent before and after the output shaft moving and to less, the lower-cost electric tool of output shaft rotational efficienty influence.
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 interconnect, described power part comprises the motor that is arranged on enclosure interior, the clutch end of described motor links to each other 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 links to each other with executing agency, described beater mechanism comprises main shaft, output shaft, hammer body and hammer anvil, described tup sheath is contained on the main shaft, described hammer body can be center rotation with the axis of main shaft and move along axis direction, described hammer anvil is arranged on the output shaft, one end of one of them of described main shaft and output shaft is provided with the protuberance that extends vertically, another a end is provided with the groove that cooperates with described protuberance vertically, realize the power transmission by cooperating of hammer body and hammer anvil between described output shaft and main shaft, it is characterized in that: groove or protuberance are provided with accepting hole, damping comprises that a flexible member and one support element, described flexible member one end supports in described accepting hole, the other end and the described element butt that supports, the described element that supports supports with the groove or the protuberance that do not offer accepting hole.
Preferably, described flexible member is a spring, and supporting element is steel ball, and described flexible member is in compressive state all the time in entire work process.
Preferably, described supporting is matched in clearance between element and the accepting hole, and supports element diameter greater than the moving gap of the string sum between the moving gap of the string between output shaft and the procapsid and output shaft and the main shaft.
Preferably, described reducing gear is a planetary gear reducing mechanism.
Preferably, described protuberance is arranged on the described output shaft, and described accepting hole is arranged on the protuberance of output shaft.
Preferably, described groove is arranged on the described main shaft, and described accepting hole is arranged in the groove of main shaft.
Preferably, described main shaft links to each other with reducing gear, and the end that hammer body is adjacent with hammer anvil is provided with first claw that cooperates with hammer anvil, and described hammer anvil is provided with second claw that matches with 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 of placing steel ball, hammer body is the column construction of hollow, and hammer body comprises the driving section that is sleeved on the axis body, and hammer body is formed with the spring placed cavity away from an end inside of hammer anvil, one end of described spring supports in the spring placed cavity, and the other end is held in the baffle plate near hammer body one side.
Preferably, described driving section includes the backstop mouth, and described backstop mouth is arranged on along the rear of the steel ball of axis direction.
Preferably, described output shaft is arranged on the place ahead of described main axis rotation axis 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 that executing agency is installed, and described hammer anvil is installed in the end of output shaft near main shaft, and described hammer anvil is supported on the procapsid by output shaft is rotatable.
Electric tool described in the utility model is by being provided with 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 with support the flexible member that element links to each other, and will support element and be integral with the flexible member press fit and be connected, utilize the automatic adjusting of flexible member to make the gap between output shaft and the housing be always zero, therefore avoided in rocking the process of electric tool, producing strike note, and owing to support element and main shaft or output shaft contacts for putting, reduced the friction between damping and main shaft or the output shaft, thereby guarantee the rotational efficienty of output shaft, electric tool structure described in the utility model is simple, compactness, production cost is low.
Description of drawings
Fig. 1 is the perspective view of the utility model electric tool;
Fig. 2 is the partial sectional view of the utility model electric tool first embodiment;
Partial view when Fig. 3 separates with second claw for first claw in the utility model electric tool first embodiment;
Fig. 4 is the partial view when first claw cooperates with second claw in the utility model electric tool first embodiment;
Fig. 5 is the partial sectional view of the utility model electric tool second embodiment;
Fig. 6 is the three-dimensional exploded view of the utility model electric tool subelement.
The specific embodiment
In order more to understand technology contents of the present utility model, especially exemplified by the specific embodiment and cooperate appended graphic being described as follows.
Please refer to Fig. 1 and Fig. 2, electric tool 10 in the utility model first embodiment, comprising housing 11, power part 12, reducing gear 13, beater mechanism 14, executing agency 15 and damping 16, is that example is elaborated to electric tool 10 to impact screwdriver in the present embodiment.
Please refer to Fig. 3, the transmission of power that reducing gear 13 is used for power part 12 is provided is to beater mechanism 14, and its clutch end links to each other with beater mechanism 14.In the present embodiment, reducing gear 13 is a 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 the planet carrier 131, planet carrier 131 is fixed in the housing 11, planetary gear 130 joins with the power output shaft 120 of motor, the power output shaft 120 of motor is provided with the gear connecting portion 1201 that is meshed with planetary gear 130, planetary gear 130 rotation under the drive of power output shaft 120, and along power output shaft 120 revolution 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, for example is with the transmission speed reducer structure; turbine and worm decelerators etc. all should belong to protection domain of the present utility model so long as can realize the general reducing gear of the deceleration effect of motor.
Please refer again to Fig. 2 and Fig. 3, main shaft 140 comprises axis body 1400 and two parallel baffles 1401, two parallel baffles 1401 are fixedly mounted on the end of axis body 1400 near reducing gear 13, hammer body 142 is installed in the end of axis body 1400 away from reducing gear 13, and main shaft 140 links to each other with the clutch end of reducing gear 13.Two parallel baffles 1401 surround with axis body 1400 and have formed the circumferential slot 1402 that holds planetary gear 130, planetary gear 130 rotation in circumferential slot 1402, and along 140 revolution of planet carrier 131 drive main shafts.Link to each other by latch 1403 between planetary gear 130 and two parallel baffles 1401 in the present embodiment, thereby drive the rotation of main shaft 140 by the rotation of planetary gear 130.In the utility model, two parallel baffles 1401 are provided with and the corresponding pilot hole of planetary gear 1300 centre bores, and latch 1403 runs through in the through hole of being made up of centre bore and pilot hole.Also be formed with the V-type groove 1404 of placing steel ball 144 on the axis body 1400, axis body 1400 axially offers groove 1405 away from an end of reducing gear 13.
Please refer to Fig. 3 and Fig. 4, in course of normal operation, motor is given main shaft 140 by the planetary gear 130 that connects on the power output shaft 120 with transmission of power, main shaft 140 drives hammer body 142 rotations that are provided with on it, hammer body 142 is gone up by it and cooperating of second claw 1431 that is provided with on first claw 1421 that is provided with and the hammer anvil 143 is driven hammer anvil 143 and rotate, thus 141 rotations of drive output shaft.First claw 1421 is at symmetrically arranged two flanges of hammer body 142 front ends, and the boss structure of second claw 1431 for matching with flange, second claw 1431 drive output shaft 141 and rotate around axis.
When the load of executing agency 15 surpasses certain torque value, hammer body 142 overcomes spring 145 in meeting elastic force moves to the direction of reducing gear 13 along axis direction, make first claw 1421 of hammer body 142 separate with second claw 1431 of hammer anvil 143, this moment, hammer anvil 143 did not temporarily rotate, hammer body 142 is rotated further under the drive of main shaft 140, this moment hammer body 142 on first claw 1421 in rotation with hammer anvil 143 on second claw 1431 overlap, after first claw 1421 turns over certain angle, hammer body 142 can be along axis direction to moving away from the direction of reducing gear 13 under the effect of spring 145, tighten mutually up to backstop mouth 1423 and the steel ball 144 that is placed in the V-type groove 1404, first claw 1421 on the hammer body 142 and second claw 1431 on the hammer anvil 143 are with clamping once more at this moment, and bigger circumferential impulsive torque of moment generation, thereby finish impact.
Please refer to Fig. 5, similar as electric tool 20 in second embodiment of the present utility model and the electric tool 10 in first embodiment, 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 1 ends support in accepting hole 2412, the other end with support element 261 and be connected, the end face that supports the groove 2411 on element 261 and the output shaft 241 joins.Same flexible member 260 adopts springs, supports element 261 and adopts and support element, and it can both be under the situation of the rotational efficienty that guarantees output shaft with the electric tool 10 in first embodiment, and the front and back string that reduces output shaft is moving, thereby reduces to go here and there the living noise of movable property.
The above; it is better embodiment of the present utility model; the utility model is not limited to above-mentioned embodiment; be appreciated that; also can change the structure of output shaft and main shaft; protuberance is arranged on the main shaft; output shaft is provided with the groove that matches 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 link to each other, support the groove floor of element and output shaft or the protuberance end face of main shaft and join; as long as it reaches technique effect of the present utility model with identical means, all should belong to protection domain of the present utility model.
Claims (2)
1. 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 interconnect, described power part comprises the motor that is arranged on enclosure interior, the clutch end of described motor links to each other 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 links to each other with executing agency, described beater mechanism comprises main shaft, output shaft, hammer body and hammer anvil, described tup sheath is contained on the main shaft, described hammer body can be center rotation with the axis of main shaft and move along axis direction, described hammer anvil is arranged on the output shaft, one end of one of them of described main shaft and output shaft is provided with the protuberance that extends vertically, another a end is provided with the groove that cooperates with described protuberance vertically, realize the power transmission by cooperating of hammer body and hammer anvil between described output shaft and main shaft, it is characterized in that: groove or protuberance are provided with accepting hole, damping comprises that a flexible member and one support element, described flexible member one end supports in described accepting hole, the other end and the described element butt that supports, the described element that supports supports with the groove or the protuberance that do not offer accepting hole.
2. electric tool according to claim 1 is characterized in that: described flexible member is a spring, and supporting element is steel ball, and described flexible member is in compressive state all the time in entire work process.
3. electric tool according to claim 2 is characterized in that: described supporting is matched in clearance between element and the accepting hole, and supports element diameter greater than the moving gap of the string sum between the moving gap of the string between output shaft and the procapsid and output shaft and the main shaft.
4. electric tool according to claim 3 is characterized in that: described reducing gear is a planetary gear reducing mechanism.
5. according to any described electric tool in the claim 1 ~ 4, it is characterized in that: described protuberance is arranged on the described output shaft, and described accepting hole is arranged on the protuberance of output shaft.
6. according to any described electric tool in the claim 1 ~ 4, it is characterized in that: described groove is arranged on the described main shaft, and described accepting hole is arranged in the groove of main shaft.
7. electric tool according to claim 1 is characterized in that: described main shaft links to each other with reducing gear, and the end that hammer body is adjacent with hammer anvil is provided with first claw that cooperates with hammer anvil, and described hammer anvil is provided with second claw that matches with first claw.
8. electric tool according to claim 7, 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 of placing steel ball, hammer body is the column construction of hollow, hammer body comprises the driving section that is sleeved on the axis body, hammer body is formed with the spring placed cavity away from an end inside of hammer anvil, one end of described spring supports in the spring placed cavity, and the other end is held in the baffle plate near hammer body one side.
9. electric tool according to claim 8 is characterized in that: described driving section includes the backstop mouth, and described backstop mouth is arranged on along the rear of the steel ball of axis direction.
10. according to any described electric tool in the claim 7 ~ 9, it is characterized in that: described output shaft is arranged on the place ahead of described main axis rotation axis 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 that executing agency is installed, and described hammer anvil is installed in the end of output shaft near main shaft, and described hammer anvil is supported on the procapsid by output shaft is rotatable.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201220645237 CN203092500U (en) | 2012-11-29 | 2012-11-29 | Electric tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201220645237 CN203092500U (en) | 2012-11-29 | 2012-11-29 | Electric tool |
Publications (1)
Publication Number | Publication Date |
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CN203092500U true CN203092500U (en) | 2013-07-31 |
Family
ID=48843942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 201220645237 Withdrawn - After Issue CN203092500U (en) | 2012-11-29 | 2012-11-29 | Electric tool |
Country Status (1)
Country | Link |
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CN (1) | CN203092500U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103009343A (en) * | 2012-11-29 | 2013-04-03 | 南京德朔实业有限公司 | Electric power tool |
-
2012
- 2012-11-29 CN CN 201220645237 patent/CN203092500U/en not_active Withdrawn - After Issue
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103009343A (en) * | 2012-11-29 | 2013-04-03 | 南京德朔实业有限公司 | Electric power tool |
CN103009343B (en) * | 2012-11-29 | 2016-04-27 | 南京德朔实业有限公司 | Electric tool |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
AV01 | Patent right actively abandoned |
Granted publication date: 20130731 Effective date of abandoning: 20160427 |
|
C25 | Abandonment of patent right or utility model to avoid double patenting |