CN204976553U - Impact switching device of electric tool gearbox - Google Patents
Impact switching device of electric tool gearbox Download PDFInfo
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- CN204976553U CN204976553U CN201520581208.7U CN201520581208U CN204976553U CN 204976553 U CN204976553 U CN 204976553U CN 201520581208 U CN201520581208 U CN 201520581208U CN 204976553 U CN204976553 U CN 204976553U
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Abstract
The utility model provides an impact switching device of electric tool gearbox, is including switching over the cover, and outside rotationally the front box body of gear box was located to the cover, the switching guide slot had been offered to the medial surface, switched over the guide slot including lieing in different planes, being parallel to each other and the guide section in perpendicular axle center to and the switching section of two guide sections of intercommunication, the output shaft, front box body is located to the pivot, the transmission shaft, but axially movable sets up in front box body transmission shaft front end and the liftoff key -type connection of output shaft tail end detachable the pivot, impact block, the transmission shaft is located to the cover, and impact block is provided with the drive block that can drive the output shaft, and switch the slider, but set up in front box body and the transmission shaft is located to pivot ground cover, switches the fixed protruding connecting block that is equipped with of slider outer peripheral face, and the connecting block runs through front box body and switching guide slot that slidable ground inlay card overlaps in the switching. The function is switched through the sliding fit realization of switching guide slot with the connecting block, and the operational reliability of switching is high, switches smoothly, switches efficiently.
Description
Technical field
The utility model relates to electric tool technical field, particularly relates to a kind of impact switching device of electric tool gearbox.
Background technology
Existing drill type electric tool is usually also with percussion drill function, and percussion drill function is many is realized by beater mechanism for they.This beater mechanism mainly comprises initiatively impact block and passive impact block, initiatively impact block is by the power transmission shaft rotary actuation of gear reduction, passive impact block is connected to working shaft, passive impact block can engage with active impact block and be driven in rotation, wherein, initiatively impact block selectively departs from passive impact block when the load suffered by working shaft increases to particular value and engages, and then again engage with passive impact block again under the rotary actuation of power transmission shaft, thus in a rotational direction intermittent impact is imposed to working shaft.
For coupling has the drill type electric tool of percussion drill function, its gear-box need be provided with the impact switching mechanism matched with beater mechanism, and this impact switching mechanism can make drill type electric tool be limited between conflicting model and the drill mode that do not impact to switch.But the impact switching mechanism of existing electric tool gearbox realizes switching mainly with the input of the switching power of circumference is converted to moving axially of power transmission shaft by the connected modes such as screw thread, and there is complex structure, switching has some setbacks, the shortcoming that switching efficiency is low.
Summary of the invention
Based on this, be necessary for the problems referred to above, provide a kind of structure simple, functional reliability is high, switches smooth and easy, the impact switching device of the electric tool gearbox that switching efficiency is high.
An impact switching device for electric tool gearbox, comprising:
Switch cover, be sheathed on outside the front casing of gear-box rotationally, described switching cover medial surface offers switching guide groove, and described switching guide groove comprises and is positioned at Different Plane, is parallel to each other and perpendicular to the boot segment in electric tool work axle center, and is communicated with the switching section of boot segment described in two;
Output shaft, is hubbed at front casing, and output shaft axle center is described work axle center;
Power transmission shaft, coaxially arrange with output shaft, can move axially and be arranged in front casing pivotly, described power transmission shaft front end and output shaft tail end separably key are connected;
Impact block, is sheathed on described power transmission shaft, and described impact block is provided with the drive block that can drive described output shaft; And
Switch slide block, being arranged in front casing and being sheathed on described power transmission shaft pivotly, described switching slide block outer peripheral face fixedly is convexly equipped with contiguous block, described contiguous block run through front casing and slidably inlay card switch in described the switching guide groove overlapped.
Wherein in an embodiment, described power transmission shaft front end is formed with the connecting key of on-circular cross-section, and described output shaft tail end offers keyhole, and described keyhole one end and described connecting key at the bottom of hole match.
Wherein in an embodiment, described connecting key is connecting key or the gear type connecting key of equilateral polygon section.
Wherein in an embodiment, described keyhole is formed with bullport in openend, and described oriented diameter and the described power transmission shaft diameter of axle match.
Wherein in an embodiment, described output shaft tail end outer periphery symmetry is convexly equipped with block, and described impact block front portion offers the accommodating cavity of accommodating output shaft tail end, and described drive block is convexly equipped in described accommodating cavity inwall and described block of conflicting.
Wherein in an embodiment, described contiguous block is the contiguous block of peg type, described switching slide block outer peripheral face symmetry offers multiple installing hole, and multiple described contiguous block is individually fixed in described installing hole, and the described switching guide groove quantity switching cover is all mated with contiguous block with position.
Wherein in an embodiment, the contiguous block of described peg type comprises to be installed shaft part and is connected shaft part, described installation shaft part is fixed in described installing hole, and inlay card is in described switching guide groove slidably for described connection shaft part, and the diameter of axle of described connection shaft part is less than the diameter of axle installing shaft part.
Wherein in an embodiment, described switching guide groove adaptive switched cover medial surface is through to lateral surface radial direction.
Wherein in an embodiment, between described switching slide block and front casing, be provided with the elastic reset part that axial elastic force is provided.
Wherein in an embodiment, described switching cover comprises switching lid and switches circle, and described switching lid is sheathed on front casing top rotationally, and switching circle is fixed on described switching lid lower edge separably, and described switching guide groove is opened in described switching circle.
The impact switching device of above-mentioned electric tool gearbox, cover is switched by rotating, switch to put and switch the switching section of guide groove and order about contiguous block and drive and switch slide block and move axially, thus drive power transmission shaft to move axially, to realize the connection of power transmission shaft and output shaft or to be separated, power transmission shaft realizes electric drill function when being connected with output axle key, can realize impact function when power transmission shaft is separated with output shaft and is only rotated by impact block driver output axle; Realized by switching guide groove and being slidably matched of contiguous block because function switches, the functional reliability of switching is high, and switch smooth and easy, switching efficiency is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the impact switching device of electric tool gearbox in an embodiment;
Fig. 2 is the normal cross-section working state schematic representation that the impact switching device of electric tool gearbox in an embodiment is in electric drill function;
Fig. 3 is the normal cross-section working state schematic representation that the impact switching device of electric tool gearbox in an embodiment is in impact function;
Fig. 4 is the switching coil structures schematic diagram that in an embodiment, electric tool gearbox switches lid;
Fig. 5 is the structural representation of the power transmission shaft of electric tool gearbox in an embodiment;
Fig. 6 is the structural representation of the output shaft of electric tool gearbox in an embodiment;
Fig. 7 is the structural representation of the output shaft of electric tool gearbox in another embodiment;
Fig. 8 is the scheme of installation of the power transmission shaft of electric tool gearbox in an embodiment, impact block and switching slide block;
Fig. 9 is the power transmission shaft shown in Fig. 8, another visual angle scheme of installation of impact block and switching slide block.
Wherein: switch cover 10, switching guide groove 110, boot segment 111, switching section 112, switching lid 120, switching circle 130, output shaft 20, keyhole 210, bullport 211, block 220, power transmission shaft 30, connecting key 310, impact block 40, drive block 410, accommodating cavity 420, switching slide block 50, contiguous block 510, shaft part 511, connection shaft part 512, installing hole 520, elastic reset part 60, front casing 90 are installed.
Detailed description of the invention
For the ease of understanding the utility model, below with reference to relevant drawings, the utility model is described more fully.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present utility model more comprehensively thorough.
As shown in Figure 1, Figure 2 and Figure 3, a kind of impact switching device of electric tool gearbox, comprising:
Switch cover 10, be sheathed on outside the front casing 90 of gear-box rotationally, described switching cover 10 medial surface offers and switches guide groove 110, described switching guide groove 110 comprises and is positioned at Different Plane, is parallel to each other and perpendicular to the boot segment 111 in electric tool work axle center, and is communicated with the switching section 112 of boot segment 111 described in two.
Output shaft 20, is hubbed at front casing 90, and output shaft 20 axle center is described work axle center.
Power transmission shaft 30, coaxially arrange with output shaft 20, can move axially and be arranged in front casing 90 pivotly, described power transmission shaft 30 front end and output shaft 20 tail end separably key are connected.
Impact block 40, is sheathed on described power transmission shaft 30, and described impact block 40 is provided with the drive block 410 that can drive described output shaft 20.
Switch slide block 50, be arranged in front casing 90 and be also sheathed on described power transmission shaft 30 pivotly, described switching slide block 50 outer peripheral face is fixedly convexly equipped with contiguous block 510, described contiguous block 510 run through front casing 90 and slidably inlay card in the switching guide groove 110 of described switching cover 10.
The impact switching device of above-mentioned electric tool gearbox, when need carry out function switching, rotatable switching cover 10, along with the rotation switching cover 10, a boot segment 111 of the adaptive switched guide groove 110 of described contiguous block 510 begins relative sliding, another boot segment 111 slid in another plane through switching section 112, thus drive switching slide block 50 to move axially.To overlap and impact block 40 is all located at power transmission shaft 30 because switching slide block 50, so the drive power transmission shaft 30 that moves axially switching slide block 50 moves axially together with impact block 40, thus realizing the connection of power transmission shaft 30 and output shaft 20 or being separated.When power transmission shaft 30 moves axially the position to being connected with output shaft 20 key, power transmission shaft 30 Direct driver output shaft 20, impact block 40 and output shaft 20 synchronous axial system, thus realize electric drill function.Depart to output shaft 20 position that key is connected when power transmission shaft 30 moves axially, power transmission shaft 30 is Direct driver output shaft 20 not, and driving impact block 40 to rotate by power transmission shaft 30, impact block 40 is rotated by drive block 410 driver output axle 20, now can realize impact function.Realize with being slidably matched of contiguous block 510 by switching guide groove 110 because function switches, the functional reliability of switching is high, and switch smooth and easy, switching efficiency is high.
It should be noted that the technology that impact block 40 driver output axle 20 realizes impact function is mature technology, do not repeat its theory and structure here.
Wherein in an embodiment, described power transmission shaft 30 front end is formed with the connecting key 310 of on-circular cross-section, and described output shaft 20 tail end offers keyhole 210, and described keyhole 210 one end and described connecting key 310 at the bottom of hole match.So, when described connecting key 310 stretches at the bottom of the hole of described keyhole 210, connecting key 310 is connected with keyhole 210 key and coordinates, and because connecting key 310 is on-circular cross-section, so when power transmission shaft 30 rotates, will drive output shaft 20 synchronous axial system, thus realizes being in transmission connection.
As shown in Fig. 5, Fig. 6 or Fig. 7, wherein in an embodiment, described connecting key 310 is connecting key 310 or the gear type connecting key 310 of equilateral polygon section.The connecting key 310 of equilateral polygon section is processed simply, and one side area is large, reliable transmission, and connecting key 310 key of gear type connects and convenient separation.Certainly, in other embodiments, described connecting key 310 also can be the connecting key 310 of other polymorphic structure.With described connecting key 310 cooperatively, described keyhole 210 one end at the bottom of hole is also the regular polygon that matches with connecting key 310 or gear ring, or the keyhole 210 of other polymorphic structure.In embodiment as shown in Figure 6, be orthohexagonal keyhole 210, the connecting key 310 matched is regular hexagon connecting key 310.And in the embodiment shown in Fig. 7, keyhole 210 is the keyhole 210 of square, the connecting key 310 matched is square connecting key 310.
Also refer to Fig. 6 or Fig. 7, wherein in an embodiment, described keyhole 210 is formed with bullport 211 in openend, and described bullport 211 aperture and described power transmission shaft 30 diameter of axle match.So, when the connecting key 310 of power transmission shaft 30 exits in described keyhole 210, can be accommodated in described bullport 211, now connecting key 310 and keyhole 210 are mismatched, and the rotation of power transmission shaft 30 does not drive output shaft 20.And when needing to be in transmission connection, connecting key 310 to protract enter key link position from described bullport 211, moving axially of bullport 211 pairs of connecting keys 310 serves guide effect, avoids the vibration of connecting key 310 radial direction or skew, improves connection reliability.
Refer to Fig. 6, Fig. 7 and Fig. 8, wherein in an embodiment, described output shaft 20 tail end outer periphery symmetry is convexly equipped with block 220, described impact block 40 front portion offers the accommodating cavity 420 of accommodating output shaft 20 tail end, and described drive block 410 is convexly equipped in described accommodating cavity 420 inwall and described block 220 of conflicting.So, when impact block 40 rotates under power transmission shaft 30 drives, driving projection in described accommodating cavity 420 rotates with impact block 40 and described block 220 lateral margin of conflicting, thus drive block 220 together to rotate thereupon, the rotation of block 220 drives output shaft 20 to rotate, and namely achieves the driving of impact block 40 pairs of output shafts 20.Certainly, in other embodiments, described drive block also can be the structure that other mates with output shaft, as gear-wheel gear-ring cooperation etc.
As shown in Figure 9, wherein in an embodiment, described contiguous block 510 is the contiguous block 510 of peg type, described switching slide block 50 outer peripheral face symmetry offers multiple installing hole 520, multiple described contiguous block 510 is individually fixed in described installing hole 520, and switching guide groove 110 quantity of described switching cover 10 is all mated with contiguous block 510 with position.
Wherein in an embodiment, the contiguous block 510 of described peg type comprises to be installed shaft part 511 and is connected shaft part 512, described installation shaft part 511 is fixed in described installing hole 520, inlay card is in described switching guide groove 110 slidably for described connection shaft part 512, and the diameter of axle of described connection shaft part 512 is less than the diameter of axle installing shaft part 511.Contiguous block 510 assembling like this and examine and replace are conveniently.
As shown in Figure 1 and Figure 4, wherein in an embodiment, described switching guide groove 110 adaptive switched cover 10 medial surface is through to lateral surface radial direction.Contiguous block 510 like this is reliable and stable with being slidably connected of switching guide groove 110, avoid deviating from the adaptive switched guide groove 110 of contiguous block 510, and through switching guide groove 110 is easy to process, saves processing cost.
As shown in Figure 2, wherein in an embodiment, the elastic reset part 60 that axial elastic force is provided between described switching slide block 50 and front casing 90, is provided with.When rotation switches cover 10, when switching slide block 50 drives power transmission shaft 30 to move axially, elastic reset part 60 is out of shape and produces reseting elasticity, to make the rotation of switching cover 10 more laborsaving, improves ease of use.
As shown in Figure 4, wherein in an embodiment, described switching cover 10 comprises switching lid 120 and switches circle 130, described switching lid 120 is sheathed on front casing 90 top rotationally, switch circle 130 and be fixed on described switching lid 120 lower edge separably, described switching guide groove 110 is opened in described switching circle 130.Described switching lid 120 can be drive separately the parts switching circle 130, also can be the parts driving switching circle 130 and other rotatable parts to share, improves structural compactness.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. an impact switching device for electric tool gearbox, is characterized in that, comprising:
Switch cover, be sheathed on outside the front casing of gear-box rotationally, described switching cover medial surface offers switching guide groove, and described switching guide groove comprises and is positioned at Different Plane, is parallel to each other and perpendicular to the boot segment in electric tool work axle center, and is communicated with the switching section of boot segment described in two;
Output shaft, is hubbed at front casing, and output shaft axle center is described work axle center;
Power transmission shaft, coaxially arrange with output shaft, can move axially and be arranged in front casing pivotly, described power transmission shaft front end and output shaft tail end separably key are connected;
Impact block, is sheathed on described power transmission shaft, and described impact block is provided with the drive block that can drive described output shaft; And
Switch slide block, being arranged in front casing and being sheathed on described power transmission shaft pivotly, described switching slide block outer peripheral face fixedly is convexly equipped with contiguous block, described contiguous block run through front casing and slidably inlay card switch in described the switching guide groove overlapped.
2. the impact switching device of electric tool gearbox according to claim 1, it is characterized in that, described power transmission shaft front end is formed with the connecting key of on-circular cross-section, and described output shaft tail end offers keyhole, and described keyhole one end and described connecting key at the bottom of hole match.
3. the impact switching device of electric tool gearbox according to claim 2, is characterized in that, described connecting key is connecting key or the gear type connecting key of equilateral polygon section.
4. the impact switching device of electric tool gearbox according to claim 2, is characterized in that, described keyhole is formed with bullport in openend, and described oriented diameter and the described power transmission shaft diameter of axle match.
5. the impact switching device of electric tool gearbox according to claim 4, it is characterized in that, described output shaft tail end outer periphery symmetry is convexly equipped with block, described impact block front portion offers the accommodating cavity of accommodating output shaft tail end, and described drive block is convexly equipped in described accommodating cavity inwall and described block of conflicting.
6. the impact switching device of electric tool gearbox according to claim 1, it is characterized in that, described contiguous block is the contiguous block of peg type, described switching slide block outer peripheral face symmetry offers multiple installing hole, multiple described contiguous block is individually fixed in described installing hole, and the described switching guide groove quantity switching cover is all mated with contiguous block with position.
7. the impact switching device of electric tool gearbox according to claim 6, it is characterized in that, the contiguous block of described peg type comprises to be installed shaft part and is connected shaft part, described installation shaft part is fixed in described installing hole, inlay card is in described switching guide groove slidably for described connection shaft part, and the diameter of axle of described connection shaft part is less than the diameter of axle installing shaft part.
8. the impact switching device of electric tool gearbox according to claim 7, is characterized in that, described switching guide groove adaptive switched cover medial surface is through to lateral surface radial direction.
9. the impact switching device of the electric tool gearbox according to claim 1 ~ 8 any one, is characterized in that, is provided with the elastic reset part providing axial elastic force between described switching slide block and front casing.
10. the impact switching device of the electric tool gearbox according to claim 1 ~ 8 any one, it is characterized in that, described switching cover comprises switching lid and switches circle, described switching lid is sheathed on front casing top rotationally, switch circle and be fixed on described switching lid lower edge separably, described switching guide groove is opened in described switching circle.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520581208.7U CN204976553U (en) | 2015-08-05 | 2015-08-05 | Impact switching device of electric tool gearbox |
| TW105211312U TWM539403U (en) | 2015-08-05 | 2016-07-27 | Impact switching device of gearbox of electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520581208.7U CN204976553U (en) | 2015-08-05 | 2015-08-05 | Impact switching device of electric tool gearbox |
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| Publication Number | Publication Date |
|---|---|
| CN204976553U true CN204976553U (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520581208.7U Active CN204976553U (en) | 2015-08-05 | 2015-08-05 | Impact switching device of electric tool gearbox |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN204976553U (en) |
| TW (1) | TWM539403U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838878A (en) * | 2016-09-20 | 2018-03-27 | 苏州宝时得电动工具有限公司 | A kind of power tool |
-
2015
- 2015-08-05 CN CN201520581208.7U patent/CN204976553U/en active Active
-
2016
- 2016-07-27 TW TW105211312U patent/TWM539403U/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838878A (en) * | 2016-09-20 | 2018-03-27 | 苏州宝时得电动工具有限公司 | A kind of power tool |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM539403U (en) | 2017-04-11 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |