CN202607627U - Function switching device of electric drill - Google Patents
Function switching device of electric drill Download PDFInfo
- Publication number
- CN202607627U CN202607627U CN 201220226087 CN201220226087U CN202607627U CN 202607627 U CN202607627 U CN 202607627U CN 201220226087 CN201220226087 CN 201220226087 CN 201220226087 U CN201220226087 U CN 201220226087U CN 202607627 U CN202607627 U CN 202607627U
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- CN
- China
- Prior art keywords
- gear shift
- limited block
- driving lever
- electric drill
- steel ball
- 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.)
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Abstract
A function switching device of an electric drill comprises a front case, a torque sleeve and an output spindle. An inner gear ring, an upper impact block and a lower impact block are sleeved on the output spindle, a screw cover is connected into the torque sleeve in a threaded manner, a spring and a washer are arranged below the screw cover, the washer contacts with the upper end face of the inner gear ring sequentially through an upper steel ball, a roller pin and a lower steel ball, and the spring is supported between the washer and the screw cover. The function switching device of the electric drill is characterized by comprising a driving lever, a limiting block and a gear shifting ring, the driving lever is provided with an annular portion, a projection portion and a vertical rod portion, the limiting block provided with a projection portion and a notch portion is sleeved on the output spindle and circumferentially restrained in the front case, an impact spring is supported between the limiting block and the annular portion, the gear shifting ring is sleeved on the front case, the vertical rod portion of the driving lever is inserted on the gear shifting ring, and the upper steel ball is restrained in the gear shifting ring. Combined pairing of three kinds is realized by rotating the gear shifting ring so that shifting of three gears is completed; the function switching device of the electric drill is quite convenient to operate; and all the gears are guaranteed to be achieved when torque is most suitable.
Description
Technical field
The utility model relates to a kind of electric drill, relates in particular to a kind of function change-over device of electric drill.
Background technology
The output torque of existing electric drill is regulated through the driving torque cover; Torque sleeve is threaded with the upper end of tooth case fore shell through the adjustment nut; Adjustment nut below is provided with the trip stop packing ring and is arranged on the trip stop packing ring and adjusts the compression spring between the nut; Concrete adjustment process is following: when driving torque overlap, torque sleeve and adjustment nut just can be oppressed compression spring under it, trip stop packing ring etc., thereby adjust output torque.When electric drill need be tightened screw, need less moment of torsion, when needs boring makes, then need bigger moment of torsion.
Can hole more efficiently for making electric drill; The electric drill that has has impact function; Like a patent No. is the Chinese utility model patent " a kind of electric drill becomes the device of electric impact drill " of ZL91208768.4 (notification number is CN2098341Y); Like a patent No. is the Chinese utility model patent " interior electric impact drill " of ZL201020535577.X (notification number is CN201783670U), and they have all disclosed a kind of like this electric drill with impact function.
Their structures and principle are similar basically; Comprise the impact gear, take turns the power transmission shaft that forms key connecting with impact teeth; Fixed gear is when power transmission shaft rotates, if above-mentioned drill bit is executed under the effect of axial force outside; Impact gear and fixed gear and will produce mesh impact, make drill bit make the compound motion that rotating band impacts.
The percussion drill that has is no matter under the condition of which kind of torsional strenght; It all has impact function, and is well-known, when electric drill is worked under less torque conditions; The impact of electric drill is not have effect basically; That is to say that electric drill need impact just producing effect most when the peak torque gear, can get into the cave electric drill more efficiently.
How to realize revolving screw, generally boring and efficient switching of holing, then need electric drill that function change-over device is arranged, promptly roughly be divided into screw shelves, drill bit shelves and impact shelves, and existing electric drill does not have handoff functionality mostly, perhaps has only second gear to switch.
Summary of the invention
The utility model technical problem to be solved is to above-mentioned prior art present situation a kind of function change-over device with electric drill of third gear switch mode to be provided, and this switching device shifter has the advantage of reasonable in design and easy switching.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of function change-over device of electric drill; Include preceding casing, torque sleeve and output main shaft, casing also can rotate outward before torque sleeve was sleeved on, and can rotate also and can move up and down in the casing before the output main shaft is installed in; Be set with ring gear on the output main shaft, go up impact block and following impact block; Said impact block down circumferentially constrains in the preceding casing, is that the end face helical teeth cooperates between last impact block and the following impact block, and the torque sleeve internal thread is connected with the spiral cover; The casing periphery also can move up and down before the spiral enclosure was located at; The below of spiral cover is provided with spring and packing ring, and said packing ring contacts with the upper surface of ring gear with following steel ball through last steel ball, needle roller successively, and said spring is supported between packing ring and the spiral cover; It is characterized in that: also comprise driving lever, limited block and gear shift circle; Said driving lever has ring part, projection portion and vertical bar portion, and vertically the upper end of bar portion links to each other with ring part through projection portion, and said ring part is set in the output main shaft; Said output main shaft is installed on the ring part through bearing; Said limited block is set on the output main shaft and circumferentially constrains in the preceding casing, and the limited block lower surface is shelved on the impact block simultaneously, and limited block has a lug boss at least and is positioned at the notch part of lug boss one side; Be supported with impact spring between limited block and the ring part; Before said gear shift snare is located on the casing and can rotate, the vertical bar portion of driving lever is plugged on the gear shift circle and can be with the rotation of gear shift circle, and it is interior and can rotate with the gear shift circle that said upward steel ball constrains in the gear shift circle; Switch under the impact shelves state at the gear shift circle, the projection portion on the said driving lever is positioned at the notch part of limited block, and simultaneously, last steel ball departs from the needle roller torque sleeve and lost efficacy; Switch at the gear shift circle under the state of screw shelves, the projection portion on the said driving lever is shelved on the lug boss of limited block, and simultaneously, last steel ball, needle roller and following steel ball are positioned at same axis torque sleeve and work; Switch under the boring shelves state at the gear shift circle, the projection portion on the said driving lever still is shelved in the projection portion of limited block, and simultaneously, last steel ball departs from the needle roller torque sleeve and lost efficacy.
Projection portion on the above-mentioned driving lever has four; Be arranged on the periphery of ring part respectively along the circle spacing; The upper end of said vertical bar portion links to each other with one of them projection portion; The periphery of said limited block has four side protuberances to outer lug, and said lug boss and notch part have four outsides that lay respectively at each side protuberance.Four lug bosses and four projection portions support each other, guarantee that ring part moves on can be steadily, and are steady to the support of output main shaft.
Have four stopper slots that axially are provided with before above-mentioned on the inner hole wall of casing, each the side protuberance on the said limited block is positioned at corresponding stopper slot.Spacing through stopper slot offside protuberance effectively prevents casing rotation before limited block relatively.
Above-mentioned output main shaft middle part has annular shoulder, and said bearing is between annular shoulder and ring part.Annular shoulder plays the upper limit effect to bearing, also can adopt collar to the bearing upper limit certainly.
The inwall of above-mentioned gear shift circle is provided with curved leaf spring, and the periphery wall of said preceding casing is provided with three arc-shaped concave, the corresponding range state of each arc-shaped concave, and the arc protuberance of said leaf spring is positioned at arc-shaped concave.Gear shift circle revolution moves a gear, and the arc protuberance of leaf spring takes place once to cooperate with the arc-shaped concave of preceding casing, and the sense of pause is arranged, and prompting user switching puts in place, strengthens the operability of switching device shifter.
For conveniently pulling the gear shift circle, has pulling part on the periphery wall of above-mentioned gear shift circle to outer lug.
Above-mentioned torque sleeve is through on the casing before constraining on the cover plate on the casing upper surface before being fixed on.
Compared with prior art; The advantage of the utility model is: move the skew of going up steel ball through the deflection of Rotation With Changing ring washer drive driving lever, driving lever upper protruding block portion with the gear shift astragal that cooperates, reaches of limited block raising portion or notch part; Realize three kinds of combination pairings; Accomplish the switching of three kinds of gears, it is quite convenient to operate, and guarantees that each gear realizes under the optimal condition of moment of torsion.
Description of drawings
Fig. 1 is the perspective view of the utility model embodiment;
Fig. 2 is the cutaway view (impacting the shelves state) of the utility model embodiment;
Fig. 3 is that the A-A of Fig. 2 is to cutaway view;
Fig. 4 is the cutaway view (screw shelves or boring shelves state) of the utility model embodiment;
Fig. 5 is that the B-B of Fig. 4 is to cutaway view;
Fig. 6 removes the perspective view (screw shelves state) behind torque sleeve and the gear shift circle for the utility model embodiment;
Fig. 7 is the assembling schematic perspective view of the utility model embodiment each parts under screw shelves state;
Fig. 8 is the utility model embodiment at the relativeness sketch map that impacts driving lever convexity piece portion and limited block under the shelves state;
Fig. 9 is the relativeness sketch map of the utility model embodiment driving lever convexity piece portion and limited block under screw shelves state;
The relativeness sketch map of Figure 10 driving lever convexity piece portion that is the utility model embodiment under boring shelves state and limited block;
Figure 11 is the perspective view of driving lever among the utility model embodiment;
Figure 12 is the perspective view of limited block among the utility model embodiment;
Figure 13 is the perspective view of gear shift circle among the utility model embodiment;
Figure 14 is the perspective view of preceding casing among the utility model embodiment.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Shown in Fig. 1～14, be a preferred embodiment of the utility model.
A kind of function change-over device of electric drill, casing 1, torque sleeve 2 and output main shaft 3 also can rotate outside the casing 1 before torque sleeve 2 is sleeved on before including, and torque sleeve 2 is through on the casing 1 before constraining on the cover plate 21 on casing 1 upper surface before being fixed on.Can rotate also and can move up and down in the casing 1 before output main shaft 3 is installed in; Output main shaft 3 is connected with drive of motor through the differential gear box structure; Be set with ring gear 4 on the output main shaft 3, go up impact block 5 and following impact block 6, ring gear 4 is parts in the differential gear box structure.
Following impact block 6 circumferentially constrains in the preceding casing 1; Cooperate for the end face helical teeth between last impact block 5 and the following impact block 6; Torque sleeve 2 internal threads are connected with spiral cover 10, and casing 1 periphery also can move up and down before spiral cover 10 was set in, and the below of spiral cover 10 is provided with spring 11 and packing ring 12; Packing ring 12 contacts with the upper surface of ring gear 4 with following steel ball 15 through last steel ball 13, needle roller 14 successively, and spring 11 is supported between packing ring 12 and the spiral cover 10.
It more than is the conventional structure of electric impact drill.
Also comprise driving lever 7, limited block 8 and gear shift circle 9; Shown in figure 11, driving lever 7 has ring part 71, projection portion 72 and vertical bar portion 73, and the projection portion 72 on the driving lever has four; Be arranged on the periphery of ring part 71 respectively along the circle spacing; Vertically the upper end of bar portion 73 links to each other with one of them projection portion 72, and ring part 71 is set in output main shaft 3, and output main shaft 3 is installed on the ring part 71 through bearing 16; Output main shaft 3 middle parts have annular shoulder 31, and bearing 16 is between annular shoulder 31 and ring part 71.
Also can rotate on the casing 1 before gear shift circle 9 is set in, have pulling part 91 on the periphery wall of gear shift circle 9 to outer lug.The vertical bar portion 73 of driving lever is plugged on the gear shift circle 9 and can be with 9 rotations of gear shift circle, in last steel ball 13 constrains in the recess 92 of gear shift circle 9 and can rotate with gear shift circle 9; Switch under the impact shelves state at gear shift circle 9, the projection portion 72 on the driving lever is positioned at the notch part 82 of limited block, and simultaneously, last steel ball 13 departs from needle roller 14 torque sleeves and lost efficacy; Switch at gear shift circle 9 under the state of screw shelves, the projection portion 72 on the driving lever is shelved on the lug boss 81 of limited block, and simultaneously, last steel ball 13, needle roller 14 and following steel ball 15 are positioned at same axis torque sleeve and work; Switch under the boring shelves state at gear shift circle 9, the projection portion 72 on the driving lever still is shelved in the projection portion 81 of limited block, and simultaneously, last steel ball 13 departs from needle roller 14 torque sleeves and lost efficacy.
The inwall of gear shift circle 9 is provided with curved leaf spring 19, and the periphery wall of preceding casing 1 is provided with three arc-shaped concave 20, each arc-shaped concave 20 corresponding range state, and the arc protuberance of leaf spring 19 is positioned at arc-shaped concave 20.
Like Fig. 2,3, shown in 8, during switching, Rotation With Changing ring washer 9; Projection portion 72 on the driving lever is positioned at the notch part 82 of limited block; Just slippage up and down of driving lever 7 like this makes the end face helical teeth circle of going up between impact block 5 and the following impact block 6 interact, simultaneously under impact spring 17 effects; Output main shaft 3 produces axially reciprocating, and produces impact effect.Simultaneously, last steel ball 13 departs from needle roller 14 torque sleeves and lost efficacy, because needle roller 14 is in ring gear 4 states that press down most with following steel ball 15, this moment, moment of torsion was maximum, and impact effect is best,
Like Fig. 4～7, shown in 9, switch at gear shift circle 9 under the state of screw shelves, the projection portion 72 on the driving lever is shelved on the lug boss 81 of limited block; Driving lever 7 slippage up and down; Impact spring 17 is its effect not, and simultaneously, last steel ball 13, needle roller 14 and following steel ball 15 are positioned at same axis torque sleeve and work; Just can realize the adjusting of moment of torsion being fit to turn screw through driving torque cover 2.
Switch under the boring shelves state at gear shift circle 9 like Fig. 4,5,10, the projection portion 72 on the driving lever still is shelved in the projection portion 81 of limited block, and simultaneously, last steel ball 13 departs from needle roller 14 torque sleeves and lost efficacy.
Claims (7)
1. the function change-over device of an electric drill; Include preceding casing (1), torque sleeve (2) and output main shaft (3); Torque sleeve (2) is sleeved on outside the preceding casing (1) and can rotates; Output main shaft (3) is installed in and can rotates also in the preceding casing (1) and can move up and down, and is set with ring gear (4) on the output main shaft (3), goes up impact block (5) and following impact block (6), and said impact block (6) down circumferentially constrains in the preceding casing (1); Cooperate for the end face helical teeth between last impact block (5) and the following impact block (6); Torque sleeve (2) internal thread is connected with spiral cover (10), and spiral cover (10) is set in preceding casing (1) periphery and can moves up and down, and the below of spiral cover (10) is provided with spring (11) and packing ring (12); Said packing ring (12) contacts with the upper surface of following steel ball (15) with ring gear (4) through last steel ball (13), needle roller (14) successively, and said spring (11) is supported between packing ring (12) and the spiral cover (10); It is characterized in that: also comprise driving lever (7), limited block (8) and gear shift circle (9); Said driving lever (7) has ring part (71), projection portion (72) and vertical bar portion (73); Vertically the upper end of bar portion (73) links to each other with ring part (71) through projection portion (74); Said ring part (71) is set in output main shaft (3), and said output main shaft (3) is installed on the ring part (71) through bearing (16), and said limited block (8) is set in output main shaft (3) and goes up and circumferentially constrain in the preceding casing (1); Limited block (8) lower surface is shelved on the impact block (5) simultaneously; Limited block (8) has a lug boss (81) at least and is positioned at the notch part (82) of lug boss one side, is supported with impact spring (17) between limited block (8) and the ring part (71), and said gear shift circle (9) is set in preceding casing (1) and goes up also and can rotate; The vertical bar portion (73) of driving lever is plugged in that gear shift circle (9) is gone up and can be with gear shift circle (9) rotation, and the said steel ball (13) of going up constrains in the gear shift circle (9) and can rotate with gear shift circle (9); Switch under the impact shelves state at gear shift circle (9), the projection portion (72) on the said driving lever is positioned at the notch part (82) of limited block, and simultaneously, last steel ball (13) departs from needle roller (14) torque sleeve and lost efficacy; Switch under the state of screw shelves at gear shift circle (9), the projection portion (72) on the said driving lever is shelved on the lug boss (81) of limited block, and simultaneously, last steel ball (13), needle roller (14) and following steel ball (15) are positioned at same axis torque sleeve and work; Switch under the boring shelves state at gear shift circle (9), the projection portion (72) on the said driving lever still is shelved in the projection portion (81) of limited block, and simultaneously, last steel ball (13) departs from needle roller (14) torque sleeve and lost efficacy.
2. the function change-over device of electric drill according to claim 1; It is characterized in that: the projection portion (72) on the said driving lever has four; Be arranged on the periphery of ring part (71) respectively along the circle spacing; The upper end of said vertical bar portion (73) links to each other with one of them projection portion (72), and the periphery of said limited block (8) has four side protuberances (83) to outer lug, and said lug boss (81) and notch part (82) have four outsides that lay respectively at each side protuberance (83).
3. the function change-over device of electric drill according to claim 2 is characterized in that: have four stopper slots (18) that axially are provided with before said on the inner hole wall of casing (1), each the side protuberance (83) on the said limited block is positioned at corresponding stopper slot (18).
4. the function change-over device of electric drill according to claim 1 is characterized in that: said output main shaft (3) middle part has annular shoulder (31), and said bearing (16) is positioned between annular shoulder (31) and the ring part (71).
5. the function change-over device of electric drill according to claim 1; It is characterized in that: the inwall of said gear shift circle (9) is provided with curved leaf spring (19); The periphery wall of casing (1) is provided with three arc-shaped concave (20) before said; The corresponding range state of each arc-shaped concave (20), the arc protuberance of said leaf spring (19) is positioned at arc-shaped concave (20).
6. the function change-over device of electric drill according to claim 1 is characterized in that: have the pulling part (91) to outer lug on the periphery wall of said gear shift circle (9).
7. the function change-over device of electric drill according to claim 1, it is characterized in that: said torque sleeve (2) constrains on the preceding casing (1) through being fixed on the cover plate (21) on preceding casing (1) upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220226087 CN202607627U (en) | 2012-05-18 | 2012-05-18 | Function switching device of electric drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220226087 CN202607627U (en) | 2012-05-18 | 2012-05-18 | Function switching device of electric drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202607627U true CN202607627U (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220226087 Expired - Fee Related CN202607627U (en) | 2012-05-18 | 2012-05-18 | Function switching device of electric drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202607627U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148702A (en) * | 2013-05-14 | 2014-11-19 | 罗伯特·博世有限公司 | Handheld tool apparatus |
| CN108656035A (en) * | 2013-06-03 | 2018-10-16 | 罗伯特·博世有限公司 | Hand held power machine with changeable transmission device |
| CN108971364A (en) * | 2018-08-28 | 2018-12-11 | 航珍航空技术（上海）有限公司 | Flareless inward turning single lead screw ex truding briquetting machine and its expander |
-
2012
- 2012-05-18 CN CN 201220226087 patent/CN202607627U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148702A (en) * | 2013-05-14 | 2014-11-19 | 罗伯特·博世有限公司 | Handheld tool apparatus |
| US10046449B2 (en) | 2013-05-14 | 2018-08-14 | Robert Bosch Gmbh | Hand tool device |
| CN104148702B (en) * | 2013-05-14 | 2020-03-03 | 罗伯特·博世有限公司 | Hand-held tool device |
| US10780562B2 (en) | 2013-05-14 | 2020-09-22 | Robert Bosch Gmbh | Hand tool device |
| CN108656035A (en) * | 2013-06-03 | 2018-10-16 | 罗伯特·博世有限公司 | Hand held power machine with changeable transmission device |
| CN108656035B (en) * | 2013-06-03 | 2021-11-16 | 罗伯特·博世有限公司 | Hand-held power tool with a switchable gear |
| CN108971364A (en) * | 2018-08-28 | 2018-12-11 | 航珍航空技术（上海）有限公司 | Flareless inward turning single lead screw ex truding briquetting machine and its expander |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20160518 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |