CN205489993U - Electric tool - Google Patents
Electric tool Download PDFInfo
- Publication number
- CN205489993U CN205489993U CN201620272344.2U CN201620272344U CN205489993U CN 205489993 U CN205489993 U CN 205489993U CN 201620272344 U CN201620272344 U CN 201620272344U CN 205489993 U CN205489993 U CN 205489993U
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- CN
- China
- Prior art keywords
- lock shaft
- electric tool
- lock
- shaft
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model relates to an instrument technical field especially relates to an electric tool, and it includes casing (1), executive component (6), drive shaft (2), switch trigger (18) and output shaft (4), and electric tool still includes one connecting bushing (3), drive shaft (2) are connected with output shaft (4) through connecting bushing (3), output shaft (4) are connected with executive component (6). This kind of electric tool part uses lessly, and the assembly is simple and convenient, and the cost is few, and noise at work is low, and vibrate less, the result of use is better.
Description
Technical field
This utility model relates to technical field of tools, particularly relates to a kind of part and uses less, and assembling simplicity, cost is few, and operating noise is low, and vibrates less, the preferable electric tool of using effect.
Background technology
The driving of the electric tool execution unit of prior art mainly has two kinds of forms, one is to arrange gear reduction between drive shaft and output shaft, then output shaft is connected with execution unit again, the electric tool of this structure is owing to using gear drive, therefore noise ratio during its work is relatively big, and the part owing to using is more, and therefore its assembly precision requires height, assembling cumbersome, cost is the highest；Also having one is directly to be connected with drive shaft by execution unit, though so simple in construction, vibration is relatively big, and it is not fine for using effect.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of part and uses less, assembling simplicity, and cost is few, and operating noise is low, and vibrates less, the preferable electric tool of using effect.
This utility model be employed technical scheme comprise that, there is provided a kind of electric tool with following structure: this electric tool includes housing, execution unit, drive shaft, switch trigger and output shaft, wherein, electric tool also includes a connecting bushing, drive shaft is connected with output shaft by connecting bushing, and output shaft is connected with execution unit.
After using above structure, compared with prior art, this utility model has the advantage that this utility model is in the case of saving gear reduction, by a connecting bushing, drive shaft and output shaft are connected, and execution unit is directly connected to output shaft, so execution unit in this utility model is the equal of directly to be driven by drive shaft, owing to need not carry out transmission by gear reduction, therefore this utility model not only parts usage amount greatly reduces, assembling becomes simple and convenient, cost is substantially reduced, and noise when preferably reducing angle grinding machine work；And because this utility model is not to be directly connected in drive shaft by execution unit, but being connected in drive shaft by output shaft and connecting bushing, so vibrating the least in use, using effect is preferable.
As preferably, the annexation between drive shaft and connecting bushing is close-fitting or pine is joined, and the annexation between output shaft and connecting bushing is close-fitting or pine is joined.Because drive shaft is mounted in housing, so the connected mode of close-fitting can improve the fastness of drive shaft and connecting bushing further, and the connected mode that pine is joined can improve the convenience of output shaft dismounting further.
As preferably, the magnitude of interference of close-fitting is less than or equal to 0.1mm, and the gap that pine is joined is less than or equal to 1mm.The span in above-mentioned two gap is the optimum clearance distance drawn after the applicant constantly puts into practice.
As preferably, described connecting bushing is provided with one for the endoporus joined with drive shaft and output shaft close-fitting or pine.Just can connect drive shaft and output shaft, simple in construction by an endoporus, and it is preferable to connect effect.
As preferably, described connecting bushing connects and has a fan blade.One fan blade is set, so can improve the radiating effect in housing, and fan blade has been arranged on connecting bushing by this utility model, and it is not provided with on the driving shaft, so can be substantially reduced the axial length after drive shaft, connecting bushing and output shaft three connect, and then can reduce the shell space taken, thus in the case of ensureing that radiating effect preferably and the most additionally increases drive shaft axial length, housing of electric tool significantly takes up room less beneficial effect.
As preferably, described fan blade lower surface is positioned at same level with the lower surface of connecting bushing.Owing to the line bag in stator has certain axial height, therefore fan blade be arranged on the purpose first of connecting bushing bottom in order to when fan blade rotates without impinging on stator line bag, avoid the occurrence of potential safety hazard, its two heat-dissipating space being to increase housing, improves radiating effect during electric tool work.
As preferably, electric tool also includes that one can be pinned drive shaft thus limits the lock shaft mechanism of drive shaft turns.Have employed lock shaft mechanism, such user need not lock output shaft by manual or extra instrument when needing and changing execution unit, and such potential safety hazard is relatively low and replacing execution unit is more convenient.
As preferably, described lock shaft mechanism includes lock shaft block, lock shaft pin, lock shaft spring and lock shaft cap, described lock shaft pin is divided into epimere, stage casing and hypomere, the head of described housing is provided with one for housing the groove of lock shaft cap and stretching into hole for what lock shaft pin stage casing was stretched into, the outside diameter of described lock shaft pin hypomere is more than stretching into aperture, hole, described lock shaft block is connected to drive shaft upper end, described lock shaft block is provided with at least one axial lock tieholen embedded for lock shaft pin hypomere, described lock shaft cap is connected to lock shaft pin epimere, described lock shaft spring is enclosed within lock shaft spring, and described lock shaft spring two ends withstand between lock shaft cap and the head of housing respectively.Use the lock shaft mechanism of this structure, not only simple in construction, use flexibly, and lock shaft effect is preferable.
As preferably, between described housing and switch trigger, it is provided with a switch safety controlling organization that can pin switch trigger.One switch safety controlling organization is set, maloperation so will not occur when electric tool does not uses, improve the safety of electric tool.
As preferably, described switch safety controlling organization includes switching bolt and being arranged on switch bolt for the lock dog spring making switch bolt reset, described switch trigger is provided with limit ribs, described switch bolt is provided with positive stop, described positive stop is positioned at above limit ribs, and described positive stop is provided with the stopper slot stopping that limit ribs moves up, described housing both sides are equipped with the through hole stretching out for switch bolt or returning, and described enclosure interior both sides are equipped with the projection for extruding lock dog spring.Use the switch safety controlling organization of this structure, simple in construction, control effect preferable, improve the safety of electric tool.
Accompanying drawing explanation
Fig. 1 is the side partial sectional view of this utility model electric tool.
Fig. 2 is the enlarged drawing of aminoacyl site in Fig. 1.
Fig. 3 is the enlarged drawing at B position in Fig. 1.
Fig. 4 is the enlarged drawing at C position in Fig. 1.
Fig. 5 is the structural representation of connecting bushing in this utility model electric tool.
Fig. 6 is the structural representation of lock shaft block in this utility model electric tool.
Fig. 7 is the structural representation of lock shaft pin in this utility model electric tool.
Fig. 8 is the head schematic diagram of this utility model electric tool middle shell.
Fig. 9 is the overhead, partial cut-away view of this utility model electric tool.
Figure 10 is the enlarged drawing at D position in Fig. 9.
Figure 11 is the structural representation of this utility model electric tool breaker in middle bolt.
Figure 12 is a part of schematic diagram of this utility model electric tool middle shell.
Figure 13 is position relationship schematic diagram during this utility model electric tool breaker in middle bolt locking switch trigger.
Figure 14 is adoptable another kind of lock shaft structural representation in this utility model electric tool.
As shown in the figure: 1, housing；2, drive shaft；3, connecting bushing；4, output shaft；5, fan blade；6, execution unit；7, endoporus；8, lock shaft block；9, lock shaft pin；10, lock shaft spring；11, inner via hole；12, locking hole；13, hole is stretched into；14, lock shaft cap；15, rotor；16, stator；17, windshield；18, switch trigger；19, switch bolt；20, lock dog spring；21, limit ribs；22, positive stop；23, press section；24, through hole；25, projection；26, storage tank；27, breach；28, baffle plate；29, stopper slot；30, groove；31, opening；32, gap；33, clutch shaft bearing；34, the second bearing；35. agnails；36, radially locking hole；37, protruding；38, cavity.
Detailed description of the invention
This utility model electric tool is described in further detail with specific embodiment below in conjunction with accompanying drawing:
The present embodiment uses angle grinding machine to illustrate, and the execution unit of angle grinding machine is abrasive disc, but other electric tools are also within protection domain of the present utility model.
As depicted in figs. 1 and 2, this utility model electric tool includes housing 1, execution unit 6 and is positioned at the drive shaft 2 of head, rotor 15, stator 16, output shaft 4, fan blade 5 and the connecting bushing 3 of housing 1.As it is shown in figure 5, connecting bushing 3 is provided with an endoporus 7, the cross section of endoporus 7 is kidney-shaped, or we are properly termed as track type.Drive shaft 2 bottom and endoporus 7 close-fitting, drive shaft 2 top is connected with the head of housing 1 by clutch shaft bearing 33, one end of output shaft 4 is joined with endoporus 7 pine, and the other end of output shaft is directly connected with execution unit 6, and the middle part of output shaft 4 is connected with the head of housing 1 by the second bearing 34.As the shape of endoporus 7 cross section, the cross section of one end of drive shaft 2 and endoporus 7 close-fitting is also in kidney-shaped, and the cross section of one end that output shaft 4 is joined with endoporus 7 pine is also in kidney-shaped.Drive shaft 2 and endoporus 7 close-fitting refer to a kind of interference fit, output shaft 4 and endoporus 7 pine are joined and refer to a kind of matched in clearance, in this embodiment, close-fitting gap between drive shaft 2 and endoporus 7 hole wall is 0.03-0.05mm, and it is 0.05-0.1mm that the pine between output shaft 4 and endoporus 7 hole wall joins gap.Space is occupied in order to reduce housing 1 head, fan blade 5 close-fitting in this utility model is connected on the excircle of connecting bushing 3, and fan blade 5 is positioned at connecting bushing 3 bottom, fan blade 5 lower surface flushes with the lower surface of connecting bushing 3, i.e. the lower surface of fan blade 5 and the lower surface of connecting bushing 3 is positioned in same level.
A lock shaft mechanism that can pin drive shaft 2 it is provided with in the head of the housing 1 of this utility model electric tool.In this embodiment, as shown in figures 1 and 3, lock shaft mechanism includes lock shaft block 8, lock shaft pin 9, lock shaft spring 10 and lock shaft cap 14, lock shaft pin 9 is divided into epimere, stage casing and hypomere, the head of housing 1 is provided with one for housing the groove 30 of lock shaft cap 14 and stretching into hole 13 for what lock shaft pin 9 stage casing was stretched into, the outside diameter of lock shaft pin 9 hypomere is more than stretching into aperture, hole 13, therefore being formed with a step between lock shaft pin 9 hypomere and stage casing, step can stop lock shaft pin 9 to eject completely from stretching into hole 13 under the restoring force effect of lock shaft spring 10.Drive shaft 2 upper end is connected with inner via hole 11 close-fitting of lock shaft block 8, and as shown in Figure 6, the inner via hole 11 of lock shaft block 8 is in kidney-shaped, and the cross section of drive shaft 2 upper end is also in kidney-shaped, and kidney-shaped structure can strengthen the fastness being connected between lock shaft block 8 with drive shaft 2.Lock shaft block 8 is provided with three axial lock tieholens 12 embedded for lock shaft pin 9 hypomere, locking hole 12 contacts with lock shaft block 8 cylindrical wall, and locking hole 12 is provided with, with lock shaft block 8 cylindrical wall contact position, the opening 31 communicated with locking hole 12,0.6-0.8 times that distance is lock shaft block 8 radius between Kong Xinyu lock shaft block 8 center of locking hole 12.In order to ensure lock shaft effect, locking hole 12 needs sufficiently large aperture, and lock shaft block 8 needs enough intensity, but, less in order to ensure that the head of housing 1 occupies space, it is less that the volume of lock shaft block 8 own will design, if locking hole 12 is excessive, the hole heart of locking hole 12 distance from lock shaft block 8 center is the shortest, and this results in the insufficient strength of lock shaft block 8, affects lock shaft effect.In the case of the purpose that locking hole 12 contacts with lock shaft block 8 cylindrical wall is to ensure that locking hole 12 has sufficiently large aperture by this specific embodiment, it is possible to ensure that lock shaft block 8 has enough intensity, thus ensure preferable lock shaft effect.
Lock shaft cap 14 is connected to lock shaft pin 9 epimere, and lock shaft pin 9 is provided with multiple agnail 35 with the junction of lock shaft cap 14, and the effect of agnail 35 is the connectivity robustness strengthening lock shaft cap 14 with lock shaft pin 9.Lock shaft spring 10 is enclosed within lock shaft pin 9, and lock shaft spring 10 two ends withstand between the head of lock shaft cap 14 and housing 1 respectively.When electric tool needs to change execution unit 6, lock shaft cap 14 can be pressed down on, lock shaft cap 14 drives lock shaft pin 9 to move down while compressing lock shaft spring 10, and finally make lock shaft pin 9 hypomere embed locking hole 12, now, under the stop of lock shaft pin 9, drive shaft 2 will not be rotated further by, thus is convenient for people to change execution unit 6 safely.After execution unit 6 is changed, as long as we unclamp lock shaft cap 14, lock shaft pin 9 will move up under the restoring force effect of lock shaft spring 10, and finally make the hypomere of lock shaft pin 9 leave locking hole 12, now, drive shaft 2 is no longer influenced by the stop of lock shaft pin 9, can be with normal rotation.
nullCertainly，As shown in figure 14，Lock shaft structure in this utility model may be used without arranging the mode of radially locking hole 36 in the circumferential wall of lock shaft block 8，Now lock shaft block 8、Lock shaft pin 9、Lock shaft spring 10 and lock shaft cap 14，Will be in the side of drive shaft 2，The axis of lock shaft pin 9 is perpendicular to the axis of drive shaft 2，The head of housing 1 also is provided with one for housing the groove 30 of lock shaft cap 14 and stretching into hole 13 for what lock shaft pin 9 stretched into，Lock shaft cap 14 is also connected with lock shaft pin 9，Unlike former lock shaft structure，A circle projection 37 it is provided with on excircle in the middle part of lock shaft pin 9，The diameter of one circle protruding 37 is more than the aperture stretching into hole 13，And housing 1 inside is additionally provided with one for the cavity 38 housing lock shaft spring 10，Projection 37 and the lock shaft spring 10 of lock shaft pin 9 are respectively positioned in cavity 38，Lock shaft spring 10 two withstands on projection 37 and cavity 38 inwall of lock shaft pin 9 respectively.The operation principle of this side level locking is identical with former lock shaft structure, therefore repeats no more.
As shown in figures 1 and 3, in this embodiment, one it is provided with for blocking the windshield 17 that extraneous air makes extraneous air can not enter into stator 16 inner ring between inwall and stator 16 upper surface of housing 1 head of this utility model electric tool, leave between the inwall of stator 16 outer ring and housing 1 head and supply external air currents and then play the gap 32 of heat sinking function, it is i.e. to have a ventilating duct flow through for extraneous air between the head of stator 16 outer ring and housing 1, so because there being the existence of windshield 17, so extraneous air may not flow into stator 16 inner ring, only can flow through motor from the gap 32 of stator 16 outer ring, i.e. do not interfere with the rotor 15 being arranged on stator 16 inner ring, i.e. dust will not be adsorbed onto on rotor 15, also there is cooling function.The distance in the gap 32 in this detailed description of the invention is 2-3mm.
As shown in Fig. 1, Fig. 4, Fig. 9, Figure 10, Figure 11, Figure 12 and Figure 13, it is provided with switch trigger 18 in housing 1 medium position of this utility model electric tool, switchs bolt 19 and for the lock dog spring 20 making switch bolt 19 reset.As shown in figure 11, switch bolt 19 is provided with the storage tank 26 for housing lock dog spring 20, and as shown in figure 12, the internal both sides of housing 1 are equipped with the projection 25 for extruding lock dog spring 20, and storage tank 26 both sides are equipped with the breach 27 stretching into extruding lock dog spring 20 for projection 25.As shown in figure 13, switch trigger 18 is provided with limit ribs 21.As shown in figure 13, described switch bolt 19 is provided with positive stop 22, and positive stop 22 is positioned at above limit ribs 21, and positive stop 22 is provided with the stopper slot 29 stopping that limit ribs 21 moves up, the top of described limit ribs 21 is curved, and matched stopper slot 29 is the most curved.As shown in figure 12, housing 1 both sides are equipped with the through hole 24 that the press section 23 for switch bolt 19 is stretched out or return.
As shown in Fig. 4 Yu Figure 12, in this embodiment, the both sides, inside of the housing 1 of this utility model electric tool are additionally provided with the position-limit mechanism of the moving direction for limit switch bolt 19, this position-limit mechanism is mainly switching bolt 19 both sides and is being provided above baffle plate 28, and so switch bolt 19 just can only move in the space that three pieces of baffle plates 28 are formed.Its operation principle is when for pressing press section 23, and whole switch bolt 19 will be promoted, and now positive stop 22 will be open so that positive stop 22 no longer stops limit ribs 21, and the most now switch trigger 18 can freely be pulled；When user unclamps press section 23, lock dog spring 20 can reset by pull switch bolt 19, and now positive stop 22 is returned to home position, starts spacing limit ribs 21, and now switch trigger 18 can not freely be pulled.
Embodiments described above is only to be described preferred embodiment of the present utility model; not scope of the present utility model is defined; on the premise of without departing from this utility model design spirit; various deformation that the technical solution of the utility model is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that this utility model claims determine.
Claims (10)
1. an electric tool, it includes housing (1), execution unit (6), drive shaft (2), switch trigger (18) and output shaft (4), it is characterized in that: electric tool also includes a connecting bushing (3), described drive shaft (2) is connected with output shaft (4) by connecting bushing (3), and described output shaft (4) is connected with execution unit (6).
Electric tool the most according to claim 1, it is characterized in that: the annexation between described drive shaft (2) and connecting bushing (3) is close-fitting or pine is joined, the annexation between described output shaft (4) and connecting bushing (3) is close-fitting or pine is joined.
Electric tool the most according to claim 2, it is characterised in that: the magnitude of interference of close-fitting is less than or equal to 0.1mm, and the gap that pine is joined is less than or equal to 1mm.
4. according to the electric tool described in Claims 2 or 3, it is characterised in that: described connecting bushing (3) is provided with one for the endoporus (7) joined with drive shaft (2) and output shaft (4) close-fitting or pine.
5. according to the electric tool described in claim 1 or 2 or 3, it is characterised in that: the upper connection of described connecting bushing (3) has a fan blade (5).
Electric tool the most according to claim 5, it is characterised in that: described fan blade (5) lower surface is positioned at same level with the lower surface of connecting bushing (3).
Electric tool the most according to claim 1, it is characterised in that: electric tool also includes that one can be pinned drive shaft (2) thus limits the lock shaft mechanism that drive shaft (2) rotates.
nullElectric tool the most according to claim 7，It is characterized in that: described lock shaft mechanism includes lock shaft block (8)、Lock shaft pin (9)、Lock shaft spring (10) and lock shaft cap (14)，Described lock shaft pin (9) is divided into epimere、Stage casing and hypomere，The head of described housing (1) is provided with one for housing the groove (30) of lock shaft cap (14) and stretching into hole (13) for what lock shaft pin (9) stage casing was stretched into，The outside diameter of described lock shaft pin (9) hypomere is more than stretching into hole (13) aperture，Described lock shaft block (8) is connected to drive shaft (2) upper end，Described lock shaft block (8) is provided with at least one axial lock tieholen (12) embedded for lock shaft pin (9) hypomere，Described lock shaft cap (14) is connected to lock shaft pin (9) epimere，Described lock shaft spring (10) is enclosed within lock shaft spring (10)，And described lock shaft spring (10) two ends withstand between the head of lock shaft cap (14) and housing (1) respectively.
9. according to the electric tool described in claim 1 or 7 or 8, it is characterised in that: it is provided with a switch safety controlling organization that can pin switch trigger (18) between described housing (1) and switch trigger (18).
Electric tool the most according to claim 9, it is characterized in that: described switch safety controlling organization includes switching bolt (19) and being arranged on the lock dog spring (20) being used for making switch bolt (19) reset on switch bolt (19), described switch trigger (18) is provided with limit ribs (21), described switch bolt (19) is provided with positive stop (22), described positive stop (22) is positioned at limit ribs (21) top, and described positive stop (22) is provided with the stopper slot (29) stopping that limit ribs (21) moves up, described housing (1) both sides are equipped with the through hole (24) stretching out for switch bolt (19) or returning, the internal both sides of described housing (1) are equipped with the projection (25) for extruding lock dog spring (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620272344.2U CN205489993U (en) | 2016-04-05 | 2016-04-05 | Electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620272344.2U CN205489993U (en) | 2016-04-05 | 2016-04-05 | Electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205489993U true CN205489993U (en) | 2016-08-17 |
Family
ID=56646708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620272344.2U Withdrawn - After Issue CN205489993U (en) | 2016-04-05 | 2016-04-05 | Electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205489993U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762989A (en) * | 2016-04-05 | 2016-07-13 | 宁波动电器有限公司 | Electric tool |
| CN108375190A (en) * | 2018-01-24 | 2018-08-07 | 浙江普莱得电器有限公司 | A kind of heat gun |
-
2016
- 2016-04-05 CN CN201620272344.2U patent/CN205489993U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762989A (en) * | 2016-04-05 | 2016-07-13 | 宁波动电器有限公司 | Electric tool |
| CN105762989B (en) * | 2016-04-05 | 2018-03-23 | 宁波动一电器有限公司 | Electric tool |
| CN108375190A (en) * | 2018-01-24 | 2018-08-07 | 浙江普莱得电器有限公司 | A kind of heat gun |
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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: 20160817 Effective date of abandoning: 20180323 |
|
| AV01 | Patent right actively abandoned |