CN203374746U - Rotable electric tool and transmission mechanism thereof - Google Patents
Rotable electric tool and transmission mechanism thereof Download PDFInfo
- Publication number
- CN203374746U CN203374746U CN201320330041.8U CN201320330041U CN203374746U CN 203374746 U CN203374746 U CN 203374746U CN 201320330041 U CN201320330041 U CN 201320330041U CN 203374746 U CN203374746 U CN 203374746U
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- live axle
- retainer
- shaft
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Abstract
The utility model relates to a rotable electric tool and a transmission mechanism of the rotable electric tool. The electric tool comprises a case, the transmission mechanism, a motor and a working head, wherein the motor is installed in the case and is used for driving the transmission mechanism, and the working head is driven by the transmission mechanism and is used for achieving functions of the tool. The transmission mechanism comprises a gearbox, a driving shaft, a shaft locking frame, a first transmission gear, a second transmission gear, a clutch, a shaft locking core and a lock ring, wherein the driving shaft is installed in the gearbox and can pivot. The clutch and the shaft locking frame are slidably connected in the axial direction, transmission protrusions are arranged on two sides in the axial direction of the clutch respectively, and an asynchronous peripheral transmission structure is formed between the shaft locking frame and the driving shaft and ensures that when the shaft locking frame and the driving shaft rotate relative to each other, the driving shaft and the shaft locking frame intervene in the pivoting state of the shaft locking frame and the pivoting state of the driving shaft respectively. The rotable electric tool and the transmission mechanism of the rotable electric tool have the advantages that automatic locking can be achieved when shifting or a shutdown is carried out to prevent reverse transmission and prolong the service life of the gears; because the driving shaft is locked when a shutdown is carried out, a clamping head can be screwed down or loosened with one hand to replace a drill or a bit.
Description
Technical field
The utility model relates to a kind of electric tool and driving mechanism thereof, is specifically related to a kind of have gearshift and the rotation type electric tool of contrary transmission auto-lock function and the driving mechanism of employing thereof simultaneously.
Background technique
At percussion drill, screwdriver set, impact wrench etc., rotate in type electric tool, moment of torsion by motor output shaft output generally can not directly act on operand, will be through the conversion of gear-box, according to certain velocity ratio, reduce rotating speed to reach suitable moment of torsion, and the gear that passes through many groups different drive ratios of now general rotation type electric tool is realized many grades of outputs, in order to realize switching in gear-box, often is provided with gear shifting structure.
In addition; in the electric tool that rotates class; driving drive shaft turns by motor output shaft is the forward transmission; when shutting down or gearshift during due to inertia or at artificial active rotation live axle, the torsion be subject to is passed to gear-box to live axle and motor output shaft is reversing drive, and reversing drive often causes damage to gearbox medium gear; affect the life-span; and, during the chuck be threaded under turning round, also do not wish drive shaft turns on live axle, so often be provided with shaft lock in the electric tool of rotation class.
In the driving mechanism of the electric tool of existing rotation class, the defect that shaft lock structure exists is must be by manually it no longer being rotated the live axle locking, and existing shaft lock structure and gear shifting structure often can not get compatible preferably, complex structure, and shaft lock mechanism can not prevent reversing drive when gearshift.
The model utility content
For solving the deficiencies in the prior art, thereby the purpose of this utility model is to provide a kind of can preventing because of the rotation type electric tool of reversing drive damage gear-box and the driving mechanism of realizing major function in this electric tool.
In order to realize above-mentioned target, the utility model adopts following technological scheme:
A kind of rotation type electric tool, comprise: casing, driving mechanism, be arranged on the motor for drive transmission device in casing, this rotation type electric tool has at least two different rotating speed output shelves, driving mechanism comprises: can carry out the live axle of pivotable, axle lock device at live axle, it being carried out to locking during oppositely to the motor transmitting torque with plural different rotating speeds under motor drives, axle lock device is arranged on live axle.
Especially, axle lock device comprises: be arranged on live axle shaft lock frame for interfering its pivotable state, be arranged on live axle the shaft lock core of pivot in unison with it, be arranged on the retainer in the live axle outside; Be formed with between shaft lock frame and live axle and make them form the circumferential drive mechanism of circumferential transmission, circumferentially drive mechanism contacts cooperation at the shaft lock frame with formation after live axle relatively rotates; Motor is by driving the shaft lock frame to form transmission to live axle.
Especially, circumferentially drive mechanism is the spline pair that key Topland radian is less than keyway bottom surface radian.
Especially, the side that the shaft lock frame is presented axially in retainer along the circumferential direction is formed with a plurality of dogs that surround in a circumferential direction the shaft lock core uniformly, form in a circumferential direction gap between dog and dog, be provided with roller in this gap, the shaft lock core replaces equally distributed outer margin contour upwards having two kinds week; Shaft lock frame, retainer, shaft lock core are fixed at the axial position of live axle.
Especially, the retainer inner ring is cylndrical surface; The shaft lock core is divided into lock segments and construction section according to the difference in its cross section perpendicular to axial direction in the axial direction, the outer rim of lock segments is formed with and the dog arc surface of a plurality of outwardly convexs one to one, be called the locking cambered surface, be a plurality of planes between the locking cambered surface, is called and loosens plane; Dog is divided into: radially extend to the shaft lock core outside the pawl arm, extend to vertically the cleft hand of lock segments end face, the cleft hand outside and inboard radially is arc surface, and it is with retainer inner ring cylndrical surface and lock cambered surface and have common rotational axis; Cleft hand all has gap with retainer and shaft lock core diametrically, roller is cylindrical body, this cylindrical body is placed in the space that retainer inner ring, lock segments outer rim, adjacent cleft hand surround, and but its diameter is less than retainer inner ring cylndrical surface to the distance of loosening plane is greater than the distance of retainer inner ring cylndrical surface to the locking cambered surface.
Especially, driving mechanism also comprises: for holding the gear-box of axle lock device, the retainer cylindrical along the circumferential direction evenly is formed with positioning convex, and gear-box is formed with the positioning groove of cooperation with it or the positioning block between the inside embedding positioning convex formed of gear-box tank wall.
Especially, driving mechanism also comprises: the first driving gear that is arranged on the independent pivotable of energy on live axle or shaft lock frame, be socketed in the second driving gear of the independent pivotable of energy on the shaft lock frame, be socketed on the shaft lock frame clutch of pivot in unison with it, clutch on axial position between the first driving gear and the second driving gear, clutch and shaft lock frame form and are slidably connected in the axial direction, the both sides that clutch shaft makes progress all are formed with the transmission projection of retractable and ejection, the first driving gear and the second driving gear all are formed with the first transmission groove and the second transmission groove coordinated with the transmission projection.
Especially, clutch is formed with mounting hole, mounting hole one end is equipped with sealed piece, the other end hole wall forms limit structure, the transmission projection is arranged in mounting hole, it is provided with the backstop dish between sealed piece and limit structure, is provided with the helical spring that withstands respectively them between backstop dish and sealed piece; The clutch excircle forms the gearshift groove.
Driving mechanism of the present utility model, for thering is the rotation type electric tool of at least two different rotating speed output shelves, this driving mechanism comprises: can carry out the live axle of pivotable, axle lock device at live axle, it being carried out to locking during oppositely to the motor transmitting torque with plural different rotating speeds under motor drives, axle lock device is arranged on live axle.
Especially, axle lock device comprises: be arranged on live axle shaft lock frame for interfering its pivotable state, be arranged on live axle the shaft lock core of pivot in unison with it, be arranged on the retainer in the live axle outside; Be formed with between shaft lock frame and live axle and make them form the circumferential drive mechanism of circumferential transmission, circumferentially drive mechanism contacts cooperation at the shaft lock frame with formation after live axle relatively rotates; Motor is by driving the shaft lock frame to form transmission to live axle.
Especially, the side that the shaft lock frame is presented axially in retainer along the circumferential direction is formed with a plurality of dogs that surround in a circumferential direction the shaft lock core uniformly, form in a circumferential direction gap between dog and dog, be provided with roller in this gap, the shaft lock core replaces equally distributed outer margin contour upwards having two kinds week; Shaft lock frame, retainer, shaft lock core are fixed at the axial position of live axle.
Especially, circumferentially drive mechanism is the spline pair that key Topland radian is less than keyway bottom surface radian; The retainer inner ring is cylndrical surface; The shaft lock core is divided into lock segments and construction section according to the difference in its cross section perpendicular to axial direction in the axial direction, the outer rim of lock segments is formed with and the dog arc surface of a plurality of outwardly convexs one to one, be called the locking cambered surface, be a plurality of planes between the locking cambered surface, is called and loosens plane; Dog is divided into: radially extend to the shaft lock core outside the pawl arm, extend to vertically the cleft hand of lock segments end face, the cleft hand outside and inboard radially is arc surface, and it is with retainer inner ring cylndrical surface and lock cambered surface and have common rotational axis; Cleft hand all has gap with retainer and shaft lock core diametrically, roller is cylindrical body, this cylindrical body is placed in the space that retainer inner ring, lock segments outer rim, adjacent cleft hand surround, and but its diameter is less than retainer inner ring cylndrical surface to the distance of loosening plane is greater than the distance of retainer inner ring cylndrical surface to the locking cambered surface.
Especially, driving mechanism also comprises: for holding the gear-box of axle lock device, the retainer cylindrical along the circumferential direction evenly is formed with positioning convex, and gear-box is formed with the positioning groove of cooperation with it or the positioning block between the inside embedding positioning convex formed of gear-box tank wall.
Intermediate axle lock frame of the present utility model, shaft lock core, retainer, roller are in structure and design in shape ingenious; only rely on inertia to realize automatically locking by the interference fit between shaft lock core, roller, retainer three; no matter the user all can be automatically locked when gearshift or shutdown; prevent reversing drive; extend gear life; and because live axle locks, directly one hand is tightened or is unscrewed chuck and come more changing drill bit or screwdriver bit when shutting down.
The accompanying drawing explanation
Fig. 1 is the localized axial cross-sectional view of a preferred embodiment of the utility model electric tool;
Fig. 2 is A shown in Fig. 1-A place radial section structural representation;
Fig. 3 is B shown in Fig. 1-B place radial section structural representation;
Fig. 4 is the C place of circle shown in Fig. 1 structure for amplifying schematic diagram;
Fig. 5 is the localized axial cross-sectional view of another preferred embodiment of the utility model electric tool.
The implication of reference character in figure:
1, gear-box, 101, positioning block;
2, live axle,
3, shaft lock frame, 301, dog, 301a, pawl arm, 301b, cleft hand;
4, the first driving gear, the 401, first transmission groove;
5, the second driving gear, the 501, second transmission groove;
6, clutch, 601, the transmission projection, 602, sealed piece, 603, the backstop dish, 604, helical spring, 605, the gearshift groove;
7, shaft lock core, 701, lock segments, 702, construction section, 701a, locking cambered surface, 701b, loosen plane;
8, retainer, 801, positioning convex;
9, roller;
10, clutch shaft bearing,
11, the second bearing,
12, working head,
13, casing,
14, motor, 15,16, impact teeth,
17, stage clip.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is done to concrete introduction.
Rotation type electric tool of the present utility model can rotate type electric tool for percussion drill, screwdriver set, common electric drill etc.
Shown in seeing figures.1.and.2, the rotation electric tool in the utility model mode of execution comprises casing 13, is arranged on the motor 14 in casing 13, the driving mechanism (unmarked in figure) be connected with motor 14 output shafts, the working head 12 be connected with the clutch end of driving mechanism, be arranged on the beater mechanism (unmarked in figure) between driving mechanism and working head 12.In the present embodiment, rotating electric tool is the double speed percussion drill, and working head 12 is drill chuck.
Driving mechanism comprises: gear-box 1, be arranged on live axle 2, shaft lock frame 3, the first driving gear 4, the second driving gear 5, clutch 6, shaft lock core 7, the retainer 8 that can carry out pivotable (pivotable in the utility model refers to that take itself central axis carries out rotation as rotating shaft, lower with) in gear-box 1.As a kind of preferred version, live axle 2 can be realized installing by clutch shaft bearing 10 and 11 two bearing members of the second bearing.
It should be noted that, this rotation type electric tool has at least two different rotating speed output shelves, that is to say that live axle 2 can be exported with plural different rotating speeds, and its driving mechanism is also the transmission mode with two or more different rotating speeds equally.
Please also refer to Fig. 3, retainer 8 cylindricals along the circumferential direction evenly are formed with positioning convex 801, and gear-box 1 is formed with the positioning groove of cooperation with it or the positioning block 101 between the inside embedding positioning convex formed of gear-box 1 tank wall.
It should be noted that, if while needing impact function, live axle 2 can carry out percussion action along its axial direction, be provided with corresponding beater mechanism in driving mechanism, such as being socketed in the paired impact teeth 15,16 on live axle 2 and making live axle 2 make its stage clip resetted 17 after impact completes, these impact structures are all that those skilled in the art are known; If do not need impact function, beater mechanism can save.
In driving mechanism, the first driving gear 4 is socketed in live axle 2 or shaft lock frame 3 outsides, embodiment shown in Fig. 1 is the first driving gear 4 and directly is socketed on live axle 2, embodiment shown in Fig. 5 is that the first driving gear 4 is socketed on shaft lock frame 3, benefit is to make shaft lock frame 3 to reduce noise when work like this, its central shaft that can take freely live axle 2 carries out pivotable (the utility model intermediate axle lock frame 3 as axle, the first driving gear 4, the second driving gear 5, clutch 6, the pivotable of shaft lock core 7 is all that the central axis around live axle 2 carries out pivotable, so below if not otherwise specified, pivotable all refers to that take the central axis of live axle 2 carries out pivotable as spin axis, also therefore they have identical axially and radially, below not explanation radial and axial all with reference to live axle 2 radially, axially), the second driving gear 5 is socketed on shaft lock frame 3, and it also can carry out independently pivotable, clutch 6 is socketed on shaft lock frame 3, and by the circumferential drive mechanism such as pin or key, clutch 6 and shaft lock frame 3 can carry out synchronous pivotable.The effect of the first driving gear 4 is to form and coordinate the transmission that realizes a stable drive ratio with the upper gear driven by motor 14, the effect of the second driving gear 5 is identical with the first driving gear 4, difference is, the gear coordinated from them is different, the gear coordinated with the second driving gear 5 or the first driving gear 4 can be directly two gears on motor 14 output shafts, can be also two gears on certain jack shaft driven by motor 14 output shafts in gear-box 1, so these two gears are because the Driven by Coaxial rotating speed is identical, but gear itself is different, so it is different that rotating speed and the moment of torsion of the first driving gear 4 and the second driving gear are given in their transmissions, this provides two different selections for live axle 2 pivotables, for its switching.The effect of clutch 6 just is this, clutch 6 on axial position between the first driving gear 4 and the second driving gear 5, and clutch 6 forms and is slidably connected in the axial direction with shaft lock frame 3, that is to say and can trend towards in the first driving gear 4 and the second driving gear 5 by manual control clutch 6, both sides on clutch 6 is axial all are formed with the transmission projection 601 of retractable and ejection, and the first driving gear 4 and the second driving gear 5 all are formed with and transmission projection 601 the first transmission groove 401 coordinated and the second transmission grooves 501, that is to say, clutch 6 can and be realized circumferential transmission by transmission projection the 601 and first transmission groove 401 with the first driving gear 4 and the second driving gear 5 coordinating of the second transmission groove 501.
It should be noted that, the first driving gear 4, the second driving gear 5, clutch 6 are the transmission paries that can replace to other form, in the utility model, so long as thereby the output shaft of motor 14 can make live axle 2 have two or more rotating speeds to get final product by switching different transmission paries, for a person skilled in the art, scheme has much like this, at this, does not add and repeats.
As a kind of preferred version, shown in Fig. 4, clutch 6 is formed with mounting hole, mounting hole one end is equipped with sealed piece 602, the other end hole wall forms limit structure, this limit structure can be form as shown in Figure 4, the one section convergent hole formed between two sections straight holes, it can be also the ladder formed between two sections straight holes, transmission projection 601 is arranged in above-mentioned mounting hole, be provided with backstop dish 603 between sealed piece 602 and limit structure, the shape of backstop dish 603 matches with limit structure and guarantees that transmission projection 601 can not break away from mounting hole fully, be provided with the helical spring 604 that withstands respectively them between backstop dish 603 and sealed piece 602, helical spring 604 is for providing the required power of transmission projection 601 that ejects, can certainly use the magnetic part of mutual repulsion.In addition, clutch 6 excircles formation have gearshift groove 605, and electric tool is responsible for the switch of gearshift as long as embed the slip that this groove gets final product solenoidoperated cluthes 6.
When clutch 6 close the first driving gear 4, perhaps just in time transmission projection 601 embeds the first transmission groove 401, this is rare occasion, situation is the parts of transmission projection 601 tops to the first driving gear 4 non-drive grooves mostly, its indentation clutch 6, because the first driving gear 4 rotates relative to clutch 6, when turning to transmission projection 601 aligning transmission groove, transmission projection 601 realizes circumferential transmission because elasticity is embedded in transmission groove, when clutch 6 close the second driving gear 5, are same situations.
In fact, what the final hope of the first driving gear 4 and the second driving gear 5 drove is live axle 2, rather than clutch 6 or the shaft lock frame 3 of pivot in unison with it.Yet shaft lock frame 3 of the present utility model is socketed on live axle 2, it neither form with live axle 2 pivotable of Complete Synchronization neither freely independently carry out pivotable (clutch 6 can't drive live axle 2) by circumferential drive mechanism.Shaft lock frame 3 with interfere with each other pivotable each other after live axle 2 can turn over several angle (when the pivotable rotating speed is inconsistent) relatively, this formation between shaft lock frame 3 and live axle 2 can realize that the structure that interferes with each other purpose is called circumferential drive mechanism.
This circumferential drive mechanism can be the singly-bound pair that key Topland radian is less than keyway bottom surface radian, certainly in order to realize stable drive, as a kind of preferred version, asynchronous axial drive mechanism is the spline pair that key Topland radian is less than keyway bottom surface radian, certainly for general knowledge, we know, the live axle 2 that is positioned at center forms the key tooth, is positioned at peripheral shaft lock frame 3 formation keyways.Shown in Fig. 2, because key Topland radian is less than keyway bottom surface radian, so live axle 2 and shaft lock frame 3 must turn over certain angle, just can make the side of key tooth, keyway, namely spline pair is realized transmission for the minor face contact of circumferential transmission, once their contacts, the pivotable state that initiatively a side can interfere the opposing party, make their pivot in unison.
The side that shaft lock frame 3 is presented axially in retainer 8 along the circumferential direction is formed with a plurality of dogs 301 that surround in a circumferential direction above-mentioned shaft lock core 7 uniformly, form in a circumferential direction between adjacent dog 301 in ，Gai gap, gap and be provided with the roller 9 that axis is parallel to live axle 2 axis.Shaft lock core 7 replaces equally distributed outer margin contour upwards having two kinds week.
From top we can find out, motor 14 output shafts directly or indirectly drive the first driving gear 4 and the second driving gear 5, while when clutch 6, coordinating (another idle running) with one of them, clutch 6 can be driven, now shaft lock frame 3 also can be driven and carry out the pivotable of synchronizeing with clutch 6, we can think that shaft lock frame 3 is the parts that directly drive live axle 2 like this, below in order to simplify the object of forward transmission and reversing drive, we only study shaft lock frame 3 and shaft lock core 7, because shaft lock frame 3 and clutch 6, the first driving gear 4 or the second driving gear 5 are all (when clutch 6 coordinate with it) of carrying out pivot in unison, can be used as a holistic approach, shaft lock core 7 is as the same with live axle 2.
Suppose that shaft lock frame 3 can drive shaft lock core 7 and carry out pivotable (being that clutch 6 drives live axle 2 work) with same rotating speed, now roller 9 is not in order to interfere the rotation of shaft lock core 7, it can not contact with shaft lock core 7 with the inner circle of retainer 8 simultaneously, so within 7 weeks, upwards necessarily having a kind of external frame can hold roller 9 to the shaft lock core, roller 9 is driven and within 2 weeks, upwards constantly shifts one's position around live axle by dog 301 contacts, oneself is also because contacting and roll with retainer 8 or shaft lock core 7 simultaneously, even now, shaft lock frame 3 rotating speeds improve (forward transmission), owing to having contacted with the circumferential transmission minor face of shaft lock core 7 and the effect of inertia, roller 9 still can not be interfered the pivotable of shaft lock core 7, only with same location status, improve rotating speed, but if shut down or the 3 rotating speeds reductions of shaft lock frame, the rotating speed of shaft lock core 7 is because inertia surpasses shaft lock frame 3, now we know that they throw off original transmission minor face, and can be to before shaft lock frame 3 driving torques to shaft lock core 7, they must turn over several angle relatively, now shaft lock core 7 turns over several angle, and roller 9 do not have shaft lock frame 3 drive under (shaft lock frame 3 reductions of speed or stop) be can not synchronize with shaft lock core 7, that is to say now, roller 9 for the circumferential position of shaft lock core 7 likely in from different places just now, because shaft lock core 7 has two kinds of external frames, we by another external frame be designed to make roller 9 be stuck in this profile and retainer 8 inner circles between shape and size, while making live axle 2 leading shaft lock frame 3 to occur (shaft lock frame 3 reductions of speed or stop) to live axle 2 can interfere reduction of speed or the shaft lock frame 3 that stops before, 7 dislocation of shaft lock core are aimed at roller 9 to this profile, shaft lock core 7 can not be more further pivotable, reversing drive has been contained in advance.
If reduction of speed operation, shaft lock frame 3 rotating speeds reduce, at shaft lock core 7(live axle 2) be reduced to synchronized with shaft lock frame 3 before, this process can constantly occur, the of short duration locking of shaft lock core 7 waits for that shaft lock frame 3 surmounts, at every turn when shaft lock frame 3 comes up with and surmount shaft lock core 7, and the angle that the relative shaft lock core 7 of shaft lock frame 3 turns over, the scope of dog 301 restriction rollers 9 is changed, and roller 9 can be transported to the profile place that can hold it and realize release.
If shutdown operation; shaft lock frame 3 rotating speeds reduce and finally stop; the process of front is consistent, and constantly locking release, just finally can't come up with to surmount because shaft lock frame 3 is static and realize release; shaft lock core 7 is by locking; be live axle 2 by locking, now the user can directly be changed the operation of chuck, because live axle 2 can not pivotable; tightened or loosened so need to not buttress live axle 2 another hands in proficiency, only needing now a hand to get final product.
As preferred version, shown in 5, retainer 8 inner rings are cylndrical surface; Shaft lock core 7 is divided into lock segments 701 and construction section 702 according to the difference in its cross section perpendicular to axial direction in the axial direction, the outer rim of lock segments 701 is formed with and dog 301 arc surface of a plurality of outwardly convexs one to one, be called locking cambered surface 701a, be a plurality of planes between locking cambered surface 701a, be called and loosen plane 701b.Loosen plane 701b and be used to provide enough spaces to roller 9, locking cambered surface 701a is used for pushing roller 9 and makes its contact retainer 8 inner rings, so, in the situation of normal synchronized pivotable, the outside of locking cambered surface 701a is not roller 9 but dog 301.Locking cambered surface 701a and loosen plane 701b and be aforesaid two kinds of concrete forms that replace equally distributed outer margin contour on circumferentially.
It should be noted that in addition, as shown in Figure 1, shaft lock frame 3, the first driving gear 4, the second driving gear, retainer 8, shaft lock core 7 are fixed at the interior axial position of gear-box 1, and they can pass through tank wall, end face each other and the packing ring of gear-box 1 as axial limit structure.
If live axle 2 is only in the electric tool of output torque (such as general electric screwdriver), live axle 2 is fixed with the relative position of gear-box 1 on it is axial, if should realizing moment of torsion output, output shaft realizes again the electric tool (such as percussion drill) of axial impact, live axle 2 can relative movement with gear-box 1 on axially at it, and this axial relative sliding is can not affect circumferential transmission and self-locking.
Above demonstration and described basic principle of the present utility model, major character and advantage.The technician of the industry should understand, and above-described embodiment does not limit the utility model in any form, and all employings are equal to replaces or technological scheme that the mode of equivalent transformation obtains, all drops in protection domain of the present utility model.
Claims (13)
1. one kind is rotated type electric tool, comprise: casing, driving mechanism, be arranged in said machine casing for driving the motor of above-mentioned driving mechanism, this rotation type electric tool has at least two different rotating speed output shelves, it is characterized in that, above-mentioned driving mechanism comprises: can carry out the live axle of pivotable with plural different rotating speeds under above-mentioned motor drives, at above-mentioned live axle, it being carried out to the axle lock device of locking during oppositely to above-mentioned motor transmitting torque, above-mentioned axle lock device is arranged on above-mentioned live axle.
2. rotation type electric tool according to claim 1, it is characterized in that, above-mentioned axle lock device comprises: be arranged on above-mentioned live axle shaft lock frame for interfering its pivotable state, be arranged on above-mentioned live axle the shaft lock core of pivot in unison with it, be arranged on the retainer in the above-mentioned live axle outside; Be formed with between above-mentioned shaft lock frame and live axle and make them form the circumferential drive mechanism of circumferential transmission, above-mentioned circumferential drive mechanism above-mentioned shaft lock frame with form and contact cooperation after live axle relatively rotates; Above-mentioned motor is by driving above-mentioned shaft lock frame to form transmission to above-mentioned live axle.
3. rotation type electric tool according to claim 2, is characterized in that, above-mentioned circumferential drive mechanism is the spline pair that key Topland radian is less than keyway bottom surface radian.
4. rotation type electric tool according to claim 2, it is characterized in that, the side that above-mentioned shaft lock frame is presented axially in above-mentioned retainer along the circumferential direction is formed with a plurality of dogs that surround in a circumferential direction above-mentioned shaft lock core uniformly, form in a circumferential direction gap between above-mentioned dog and dog, be provided with roller in this gap, above-mentioned shaft lock core replaces equally distributed outer margin contour upwards having two kinds week; Above-mentioned shaft lock frame, retainer, shaft lock core are fixed at the axial position of above-mentioned live axle.
5. rotation type electric tool according to claim 4, is characterized in that, above-mentioned retainer inner ring is cylndrical surface; Above-mentioned shaft lock core is divided into lock segments and construction section according to the difference in its cross section perpendicular to axial direction in the axial direction, the outer rim of lock segments is formed with and the above-mentioned dog arc surface of a plurality of outwardly convexs one to one, be called the locking cambered surface, be a plurality of planes between above-mentioned locking cambered surface, is called and loosens plane; Above-mentioned dog is divided into: radially extend to the above-mentioned shaft lock core outside the pawl arm, extend to vertically the cleft hand of above-mentioned lock segments end face, the above-mentioned cleft hand outside and inboard radially is arc surface, and itself and above-mentioned retainer inner ring cylndrical surface and above-mentioned locking cambered surface have common rotational axis; Above-mentioned cleft hand all has gap with above-mentioned retainer and shaft lock core diametrically, above-mentioned roller is cylindrical body, this cylindrical body is placed in the space that above-mentioned retainer inner ring, lock segments outer rim, adjacent cleft hand surround, and but its diameter is less than above-mentioned retainer inner ring cylndrical surface and loosens the distance on plane be greater than the distance of above-mentioned retainer inner ring cylndrical surface to above-mentioned locking cambered surface to above-mentioned.
6. rotation type electric tool according to claim 2, it is characterized in that, above-mentioned driving mechanism also comprises: for holding the gear-box of above-mentioned axle lock device, above-mentioned retainer cylindrical along the circumferential direction evenly is formed with positioning convex, and the said gear case is formed with the positioning groove of cooperation with it or the positioning block between the inside above-mentioned positioning convex of embedding formed of gear-box tank wall.
7. according to the described rotation type electric tool of claim 2 to 6 any one, it is characterized in that, above-mentioned driving mechanism also comprises: the first driving gear that is arranged on the independent pivotable of energy on above-mentioned live axle or shaft lock frame, be socketed in the second driving gear of the independent pivotable of energy on above-mentioned shaft lock frame, be socketed on above-mentioned shaft lock frame the clutch of pivot in unison with it, above-mentioned clutch on axial position between above-mentioned the first driving gear and the second driving gear, above-mentioned clutch and shaft lock frame form and are slidably connected in the axial direction, the both sides that above-mentioned clutch shaft makes progress all are formed with the transmission projection of retractable and ejection, above-mentioned the first driving gear and the second driving gear all are formed with the first transmission groove and the second transmission groove coordinated with above-mentioned transmission projection.
8. rotation type electric tool according to claim 7, it is characterized in that, above-mentioned clutch is formed with mounting hole, above-mentioned mounting hole one end is equipped with sealed piece, the other end hole wall forms limit structure, above-mentioned transmission projection is arranged in above-mentioned mounting hole, it is provided with the backstop dish between above-mentioned sealed piece and above-mentioned limit structure, between above-mentioned backstop dish and sealed piece, is provided with the helical spring that withstands respectively them; Above-mentioned clutch excircle forms the gearshift groove.
9. a driving mechanism, for thering is the rotation type electric tool of at least two different rotating speed output shelves, it is characterized in that, this driving mechanism comprises: can carry out the live axle of pivotable with plural different rotating speeds under motor drives, at above-mentioned live axle, it being carried out to the axle lock device of locking during oppositely to the motor transmitting torque, above-mentioned axle lock device is arranged on above-mentioned live axle.
10. driving mechanism according to claim 9, it is characterized in that, above-mentioned axle lock device comprises: be arranged on above-mentioned live axle shaft lock frame for interfering its pivotable state, be arranged on above-mentioned live axle the shaft lock core of pivot in unison with it, be arranged on the retainer in the above-mentioned live axle outside; Be formed with between above-mentioned shaft lock frame and live axle and make them form the circumferential drive mechanism of circumferential transmission, above-mentioned circumferential drive mechanism above-mentioned shaft lock frame with form and contact cooperation after live axle relatively rotates; Above-mentioned motor is by driving above-mentioned shaft lock frame to form transmission to above-mentioned live axle.
11. driving mechanism according to claim 10, it is characterized in that, the side that above-mentioned shaft lock frame is presented axially in above-mentioned retainer along the circumferential direction is formed with a plurality of dogs that surround in a circumferential direction above-mentioned shaft lock core uniformly, form in a circumferential direction gap between above-mentioned dog and dog, be provided with roller in this gap, above-mentioned shaft lock core replaces equally distributed outer margin contour upwards having two kinds week; Above-mentioned shaft lock frame, retainer, shaft lock core are fixed at the axial position of above-mentioned live axle.
12. driving mechanism according to claim 11, is characterized in that, above-mentioned circumferential drive mechanism is the spline pair that key Topland radian is less than keyway bottom surface radian; Above-mentioned retainer inner ring is cylndrical surface; Above-mentioned shaft lock core is divided into lock segments and construction section according to the difference in its cross section perpendicular to axial direction in the axial direction, the outer rim of lock segments is formed with and the above-mentioned dog arc surface of a plurality of outwardly convexs one to one, be called the locking cambered surface, be a plurality of planes between above-mentioned locking cambered surface, is called and loosens plane; Above-mentioned dog is divided into: radially extend to the above-mentioned shaft lock core outside the pawl arm, extend to vertically the cleft hand of above-mentioned lock segments end face, the above-mentioned cleft hand outside and inboard radially is arc surface, and itself and above-mentioned retainer inner ring cylndrical surface and above-mentioned locking cambered surface have common rotational axis; Above-mentioned cleft hand all has gap with above-mentioned retainer and shaft lock core diametrically, above-mentioned roller is cylindrical body, this cylindrical body is placed in the space that above-mentioned retainer inner ring, lock segments outer rim, adjacent cleft hand surround, and but its diameter is less than above-mentioned retainer inner ring cylndrical surface and loosens the distance on plane be greater than the distance of above-mentioned retainer inner ring cylndrical surface to above-mentioned locking cambered surface to above-mentioned.
13. driving mechanism according to claim 12, it is characterized in that, above-mentioned driving mechanism also comprises: for holding the gear-box of above-mentioned axle lock device, above-mentioned retainer cylindrical along the circumferential direction evenly is formed with positioning convex, and the said gear case is formed with the positioning groove of cooperation with it or the positioning block between the inside above-mentioned positioning convex of embedding formed of gear-box tank wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320330041.8U CN203374746U (en) | 2013-06-08 | 2013-06-08 | Rotable electric tool and transmission mechanism thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320330041.8U CN203374746U (en) | 2013-06-08 | 2013-06-08 | Rotable electric tool and transmission mechanism thereof |
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| Publication Number | Publication Date |
|---|---|
| CN203374746U true CN203374746U (en) | 2014-01-01 |
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| CN201320330041.8U Expired - Lifetime CN203374746U (en) | 2013-06-08 | 2013-06-08 | Rotable electric tool and transmission mechanism thereof |
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| CN (1) | CN203374746U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613098A (en) * | 2015-02-03 | 2015-05-13 | 魏伯卿 | Screw magnetic repulsion synchronizer |
| CN104696382A (en) * | 2015-03-26 | 2015-06-10 | 魏伯卿 | Screw push-pull spring synchronizer |
-
2013
- 2013-06-08 CN CN201320330041.8U patent/CN203374746U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613098A (en) * | 2015-02-03 | 2015-05-13 | 魏伯卿 | Screw magnetic repulsion synchronizer |
| CN104696382A (en) * | 2015-03-26 | 2015-06-10 | 魏伯卿 | Screw push-pull spring synchronizer |
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