CN204083086U - The electric tool of centrifugal clutch, variable speed - Google Patents
The electric tool of centrifugal clutch, variable speed Download PDFInfo
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- CN204083086U CN204083086U CN201420472580.XU CN201420472580U CN204083086U CN 204083086 U CN204083086 U CN 204083086U CN 201420472580 U CN201420472580 U CN 201420472580U CN 204083086 U CN204083086 U CN 204083086U
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- driving
- gearshift
- clutch shaft
- driving wheel
- gearshift part
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Abstract
The utility model discloses a kind of centrifugal clutch; it comprises multiple coaxial driving wheel; the periphery wall of driving wheel is provided with at least one groove; also comprise: a clutch shaft; described clutch shaft arranges multiple driving pin; described clutch shaft limits driving pin and only can move freely along the radial direction of described driving wheel, to enter or to leave the groove on driving wheel; One gearshift part, gearshift part can drive driving pin to move to enter described groove to described driving wheel direction; When a driving pin enters groove, other driving pins depart from described groove rotate the effect of the centrifugal force produced at described clutch shaft under.Centrifugal clutch of the present utility model utilizes the effect of gearshift part and centrifugal force, combines respectively more, thus realize the function of clutch shifting by organizing driving pin from different driving wheels.The invention also discloses a kind of electric tool adopting this centrifugal clutch, it is compared with the electric tool of other shift-variables, has the advantages such as structure is simple, easy to operate.
Description
Technical field
The utility model relates to a kind of centrifugal clutch and applies the electric tool of variable speed of this centrifugal clutch.
Background technique
Clutch is a kind of common components, is mainly used in transmitting in the process of rotating speed at driving part and driven member, changes rotating ratio.Centrifugal clutch be then utilize driving part or driven member to produce in high speed rotating process centrifugal force to realize the clutch of gearshift function.Clutch can be widely used in the field such as Motor Vehicle, electric tool.Such as, in field of power tools, comprise on the instrument such as electric drill, electric wrench, its power is provided by motor, and the output speed of motor is higher, thus first need to slow down to the output speed of motor, normal employing planet wheel speed reducer at present, planet wheel speed reducer can, with the driving wheel of multiple different rotating speeds ratio, be selected to combine from different driving wheels by a clutch, under motor halted state or working state, freely can switch the rotating speed that electric tool exports, namely shift gears.At present, the working principle being applied in the clutch on electric tool is: by the radial motion of clutch outer, with the axial motion of dynamic clutch inner ring, thus the key on clutch inner ring is made to take turns with the different driving of planet wheel speed reducer the switching being connected and realizing high bottom gear.It is in actual shift process, and key enters in the process of the keyway that driving wheel is arranged vertically, is easily subject to the edge barrier of driving wheel, thus occurs retardance when making gearshift, gearshift is had some setbacks, reduces the experience of user.It is simple that the utility model wishes to design a kind of structure exactly, shift gears clutch and application thereof easily, the application especially in electric tool.
Model utility content
To achieve these goals, it is simple that the utility model devises a kind of structure, centrifugal clutch easily of shifting gears, and devise a kind of electric tool adopting this clutch.
The technical solution of the utility model is to provide a kind of centrifugal clutch, and it comprises multiple coaxial driving wheel, it is characterized in that: the periphery wall of described driving wheel is provided with at least one groove, also comprises:
One clutch shaft, described clutch shaft arranges multiple driving pin, and described clutch shaft limits described driving pin and only can move freely along the radial direction of described driving wheel, to enter or to leave the groove on described driving wheel;
One gearshift part, described gearshift part can drive described driving pin to move to enter described groove to described driving wheel direction; When described in one group, driving pin enters described groove, other are organized described driving pin rotates the effect of the centrifugal force produced at described clutch shaft under and depart from described groove.
Preferably, described clutch shaft is cylindrical shape, its periphery wall is arranged the many groups of circular holes run through, and described often group circular hole and described each driving wheel one_to_one corresponding on axial position, all arrange driving pin described in each described circular hole, described driving pin is spherical.
Preferably, described gearshift part is cylindrical shape, and described gearshift part is socketed in outside described clutch shaft, the inwall of described gearshift part is provided with the accommodating cavity of an accommodating described driving pin.
Preferably, described accommodating cavity is the annular coaxial with described gearshift part.
Preferably, also comprise the locking hoop of a driving described gearshift part along the movement of described driving wheel axial direction, and at the driving casing that the outside of locking hoop is socketed.
Preferably, described driving casing is be enclosed within the cylindrical shape outside described gearshift part, described driving casing is arranged at least one spiral chute, all can arrange a slide block in each described spiral chute, and described slide block and described gearshift part link.
Preferably, described gearshift part is socketed a ring locking hoop outward, described locking hoop is connected to one by bearing and back-up ring and gearshift part, described locking hoop is arranged several circular holes, in each described circular hole, slide block described in is set, described slide block is spherical, and on described driving casing, correspondence arranges spiral chute described in several.
Preferably, being socketed one outside described driving casing drives described locking hoop around the gearshift ring of own axis.
Preferably, outside described gearshift part, be socketed a gear shift ring, described gearshift part outer wall arranges at least one pin-and-hole, described gearshift ring is arranged at least one and insert stop pin in described pin-and-hole.
Preferably, described driving wheel, clutch shaft, gearshift part and locking hoop are all arranged in the center hole of described driving casing, and described clutch shaft is arranged in described driving casing rotationally by bearing.
Preferably, described clutch shaft or gearshift part arrange a hole, in described hole, set gradually a spring and one second steel ball, on the inwall of described gearshift part or the outer wall of clutch shaft corresponding arrange multiple can the locating slot of accommodating described second steel ball of part.
The utility model also provides a kind of electric tool of variable speed, it comprises motor, to the power supply of described feeding electric motors, by described motor-driven multi-stage speed-reducing case, described multi-stage speed-reducing case comprises the different driving wheel of at least two reduction speed ratio, it is characterized in that, the periphery wall of described driving wheel is provided with at least one groove, also comprises:
One clutch shaft, described clutch shaft arranges multiple driving pin, and described clutch shaft limits described driving pin and only can move freely along the radial direction of described driving wheel, to enter or to leave the groove on described driving wheel;
One gearshift part, described gearshift part can drive described driving pin to move to enter described groove to described driving wheel direction; When described in one group, driving pin enters described groove, other are organized described driving pin rotates the effect of the centrifugal force produced at described clutch shaft under and depart from described groove.
Preferably, described clutch shaft is cylindrical shape, its periphery wall is arranged and organizes circular hole more, and described circular hole and described driving wheel one_to_one corresponding on axial position, all arrange driving pin described in each described circular hole, and described driving pin is spherical.
Preferably, described gearshift part is cylindrical shape, and described gearshift part is socketed in outside described clutch shaft, the inwall of described gearshift part is provided with the accommodating cavity of an accommodating described driving pin.
Preferably, described accommodating cavity is the annular coaxial with described gearshift part.
Preferably, also comprise the locking hoop of a driving described gearshift part along the movement of described driving wheel axial direction, and at the driving casing that the outside of locking hoop is socketed.
Preferably, described driving casing is be enclosed within the cylindrical shape outside described gearshift part, described driving casing is arranged at least one spiral chute, all can arrange a slide block in each described spiral chute, and described slide block and described gearshift part link.
Preferably, described gearshift part is socketed a ring locking hoop outward, described locking hoop is connected to one by bearing and back-up ring and gearshift part, described locking hoop is arranged several circular holes, in each described circular hole, slide block described in is set, described slide block is spherical, and on described driving casing, correspondence arranges spiral chute described in several.
Preferably, being socketed one outside described driving casing drives described locking hoop around the gearshift ring of own axis.
Preferably, be socketed a gearshift ring outside described gearshift part, described gearshift part outer wall arranges at least one pin-and-hole, described gearshift ring is arranged at least one and insert stop pin in described pin-and-hole.
Preferably, described driving wheel, clutch shaft, gearshift part and driving casing are all arranged in the center hole of described driving casing, and described clutch shaft is arranged in described driving casing rotationally by bearing.
Preferably, described clutch shaft or gearshift part arrange a hole, in described hole, set gradually a spring and one second steel ball, on the inwall of described gearshift part or the outer wall of clutch shaft corresponding arrange multiple can the locating slot of accommodating described second steel ball of part.
Centrifugal clutch of the present utility model utilizes the effect of gearshift part and centrifugal force, combines respectively more, thus realize the function of clutch shifting by organizing driving pin from different driving wheels.The invention also discloses a kind of electric tool adopting this centrifugal clutch, it is compared with the electric tool of other shift-variables, has the advantages such as structure is simple, easy to operate.
Accompanying drawing explanation
Fig. 1 is the decomposition texture schematic diagram of the utility model first embodiment;
Sectional view when Fig. 2 is the utility model first embodiment first grade;
Sectional view when Fig. 3 is the utility model first embodiment's second gear;
Fig. 4 is the exploded structural representation of the utility model second embodiment;
Fig. 5 is the partial sectional view of the utility model second embodiment;
Fig. 6 is the sectional view of the utility model second embodiment;
Fig. 7 is the perspective view of electric tool of the present utility model.
Embodiment
Below embodiment of the present utility model is described in further detail.
As shown in Figures 1 to 8, a kind of centrifugal clutch of the present utility model comprises:
First driving wheel 10 and the second driving wheel 10', all driving wheels (the present embodiment middle finger first driving wheel 10 and the second driving wheel 10', lower same) distribute along the same axis, the rotating speed of driving mechanism is transmitted with different reduction speed ratio, such as, multiple drive power wheel in common planet wheel speed reducer, the periphery wall of each driving wheel is provided with at least one groove 12;
One clutch shaft 14, clutch shaft 14 is arranged multiple driving pin 16, and clutch shaft 14 limits driving pin 16 and only can move freely along the radial direction of driving wheel, to enter or to leave the groove 12 on driving wheel; Only allow one group of driving pin 16 at the most to enter in the groove 12 of a driving wheel, now, clutch shaft 14 and this driving wheel are formed and link, and rotate, thus can transmit the output torque of this driving wheel with this driving wheel simultaneously; When clutch shaft 14 rotates, driving pin 16 can be driven together to rotate with it;
One gearshift part 18, the direction that gearshift part 18 can drive driving pin 16 footpath to yearn for driving wheel moves to enter groove 12, gearshift part 18 is when driving driving pin 16 to enter groove 12, meet above-mentioned while only allow one group of driving pin 16 to enter condition in the groove 12 of a driving wheel; Now, other driving pins 16 can produce centrifugal action because of rotation, and depart from groove 12; Gearshift part 18 or clutch shaft 14 provide other driving pins 16 to depart from the necessary containing space of groove 12.
More than be the necessary structure of centrifugal clutch of the present utility model, be below the utility model provide two for the most preferred embodiment of two driving wheels:
In first embodiment, clutch shaft 14 is cylindrical shape, its periphery wall is arranged multiple circular hole 20, circular hole 20 is distributed in two with on the first driving wheel 10 and the coaxial circle of the second driving wheel 10', two circle respectively with the first driving wheel 10, second driving wheel 10' one_to_one corresponding on axial position, each circle is arranged equally spacedly at least three circular holes 20 run through along clutch shaft 14 radial direction, to obtain preferably transmission stability; Two round notes are respectively a and b, all not shown, but describe according to this, and those of ordinary skill in the art can know and know the position of this circle exactly.All arrange a driving pin 16 in each circular hole 20, driving pin 16 is spherical.Driving pin 16 can move freely along clutch shaft 14 radial direction in circular hole 20.
Gearshift part 18 is also cylindrical shape, and gearshift part 18 is socketed in outside clutch shaft 14, the inwall of gearshift part 18 is provided with the accommodating cavity 22 of an accommodating driving pin 16, and accommodating cavity 22 is the annular coaxial with gearshift part 18.The internal diameter of gearshift part 18 is more bigger than the external diameter of clutch shaft 14, does not hinder gearshift part 18 moving axially along clutch shaft 14; The depth bounds of accommodating cavity 22 is 1/4 ~ 1/2 of driving pin 16 diameter, and width, slightly larger than the diameter of driving pin 16, does not hinder driving pin 16 to pass in and out accommodating cavity 22.Adopt this structure, when axially moving forward and backward gearshift part 18 along clutch shaft 14, the position of accommodating cavity 22 is mobile at round a and the b place at two place's driving pin 16 places, when accommodating cavity 22 moves to a place, the now centrifugal action that produces by the rotation of clutch shaft 14 of the driving pin 16 at a place and outwards move in accommodating cavity 22 along circular hole 20, its front portion is exited from the groove 12 of the first driving wheel 10, thus removes the interlock of clutch shaft 14 and the first driving wheel 10; Now, the edge of accommodating cavity 22 forms extruding to the driving pin 16 at b place, promotes it and moves inward along circular hole 20, and enter in the groove 12 on the second driving wheel 10', thus make clutch shaft 14 and the second driving wheel 10' realize linking, and realizes gearshift; When accommodating cavity 22 moves to b place, its principle is the same., also can adopt other solutions herein, such as, adopt the gearshift part 18 of seesaw structure, its two ends are deep into drive driving pin 16 wherein in a circular hole 20 of two circle correspondences, are accommodating cavity 22 with circular hole 20; The pressure of gearshift part 18 one end, then this place's driving pin 16 enters the groove 12 of driving wheel, and the driving pin 16 of the other end departs from the groove 12 of driving wheel, can be implemented in equally on two gears and switches; Although not shown, but those of ordinary skill in the art can describe this structure accordingly, design corresponding structure easily.
Further, the driving casing 24 of a driving gearshift part 18 along the movement of driving wheel axial direction is also comprised.In this first embodiment, driving casing 24 is for being enclosed within the cylindrical shape outside gearshift part 18, and driving casing 24 is arranged multiple spiral chute 26, all arrange a slide block 28 in each spiral chute 26, this slide block 28 is also spherical, and slide block 28 can move along spiral chute 26.The other end of slide block 28 contacts to realize linking with gearshift part 18, and the implementation of the interlock in the present embodiment is:
The outer socket of gearshift part 18 one ring locking hoop 29, locking hoop 29 envelopes the bearing 48 on gearshift part 18, arranges two back-up rings 50 and 52 simultaneously, to form stable structure, thus fixes with gearshift part 18; Locking hoop 29 is arranged multiple circular hole 31, a slide block 28 is set in each circular hole 31.Like this, rotate ring 36 of shifting gears, make to move in the spiral chute 26 of slide block 28 on driving casing 24, convert the circular movement of gearshift ring 36 to slide block 28 and move forward and backward vertically, drive locking hoop 29 and gearshift part 18 axially to move forward and backward along self simultaneously.Herein, those of ordinary skill in the art should find out similar replacement scheme easily.
Further, clutch shaft 14 is arranged a blind hole 30, in blind hole 30, sets gradually spring 32 and one second steel ball 34, on the inwall of gearshift part 18 corresponding arrange multiple can the locating slot (not shown) of accommodating second steel ball 34 of part.The position corresponding circle a and circle b respectively of fixed groove, namely when accommodating cavity 22 moves to round a or b place, the second steel ball 34 just in time embeds in locating slot, to realize the restriction of the position exchanging block piece 18, avoids it to move freely; When external force drives gearshift part 18 to move, external force pressure makes the second steel ball 34 depart from from locating slot, thus removes the restriction that the position of block piece 18 exchanged by the second steel ball 34.
Further, driving wheel, clutch shaft 14, gearshift part 18 and locking hoop 29 are all arranged in the center hole of driving casing 24, and this structure makes clutch configuration compact, and volume is little.
The gearshift ring 36 of a driving locking hoop 29 around own axis can also be socketed outside driving casing 24.
The utility model also provides the second embodiment, its most of structure is with the first embodiment, change part as Figure 4-Figure 6: socket one gearshift ring 36 outside gearshift part 18, gearshift part 18 outer wall arranges one or more pin-and-hole 38, gearshift ring 36 is arranged the stop pin 40 in one or more insertion pin-and-hole 38.Thus make operator pass through movable gearshift ring 36 to drive gearshift part 18 movable, to realize gear shift operation.
Fig. 7 is the structural representation of the electric tool adopting centrifugal clutch of the present utility model.It power supply 44 comprising motor 42, power to motor 42, the multi-stage speed-reducing case driven by motor 42 (the planet wheel speed reducer 54 namely in Fig. 2), multi-stage speed-reducing case comprises the different driving wheel (not shown) of at least two reduction speed ratio.Multi-stage speed-reducing case connects centrifugal clutch of the present utility model, and the gearshift ring 36 in centrifugal clutch of the present utility model exposes outside electric tool, manually shifts gears, i.e. Rotation With Changing baffle ring 36 to be supplied to user, thus realizes gearshift.The principle of concrete gearshift is same as above.Also comprise handle 46, in handle, be provided with control mechanism (not shown).The structure of electric tool is common power hand tool, its centrifugal clutch with external structure known by industry.
Above embodiment is only the utility model a kind of mode of execution wherein, 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. a centrifugal clutch, it comprises multiple coaxial driving wheel, it is characterized in that: the periphery wall of described driving wheel is provided with at least one groove, also comprises:
One clutch shaft, described clutch shaft arranges multiple driving pin, and described clutch shaft limits described driving pin and only can move freely along the radial direction of described driving wheel, to enter or to leave the groove on described driving wheel;
One gearshift part, described gearshift part can drive described driving pin to move to enter described groove to described driving wheel direction; When described in one group, driving pin enters described groove, other are organized described driving pin rotates the effect of the centrifugal force produced at described clutch shaft under and depart from described groove.
2. centrifugal clutch according to claim 1, it is characterized in that: described clutch shaft is cylindrical shape, its periphery wall is arranged and organizes circular hole more, described often group circular hole and described driving wheel one_to_one corresponding on axial position, all arrange driving pin described in each described circular hole, described driving pin is spherical.
3. centrifugal clutch according to claim 2, is characterized in that: described gearshift part is cylindrical shape, and described gearshift part is socketed in outside described clutch shaft, the inwall of described gearshift part is provided with the accommodating cavity of an accommodating described driving pin; Described accommodating cavity is the annular coaxial with described gearshift part.
4. centrifugal clutch according to claim 3, is characterized in that: also comprise the ring locking hoop of a driving described gearshift part along the movement of described driving wheel axial direction, and at the driving casing that the outside of locking hoop is socketed.
5. centrifugal clutch according to claim 4, it is characterized in that: described driving casing is be enclosed within the cylindrical shape outside described locking hoop, described driving casing is arranged at least one spiral chute, all can arrange a slide block in each described spiral chute, described slide block and described locking hoop link.
6. centrifugal clutch according to claim 5, it is characterized in that: described gearshift part is socketed a ring locking hoop outward, described locking hoop is connected to one by bearing and back-up ring and gearshift part, described locking hoop is arranged several circular holes, in each described circular hole, all slide block described in can be set, described slide block is spherical, and on described driving casing, correspondence arranges spiral chute described in several; Being socketed one outside described driving casing drives described locking hoop around the gearshift ring of own axis.
7. centrifugal clutch according to claim 4, is characterized in that: be socketed a gearshift ring outside described locking hoop, described locking hoop outer wall arranges at least one pin-and-hole, described gearshift ring is arranged at least one and insert stop pin in described pin-and-hole.
8. according to the centrifugal clutch of claim 5-7 described in one of them, it is characterized in that: described driving wheel, clutch shaft, gearshift part and locking hoop are all arranged in the center hole of described driving casing, and described clutch shaft is arranged in described driving casing rotationally by bearing.
9. centrifugal clutch according to claim 8, it is characterized in that: described clutch shaft or gearshift part arrange a hole, set gradually a spring and one second steel ball in described hole, on the inwall of described gearshift part or the outer wall of clutch shaft corresponding arrange multiple can the locating slot of accommodating described second steel ball of part.
10. an electric tool for variable speed, is characterized in that, comprises motor, to the power supply of described feeding electric motors, by described motor-driven multi-stage speed-reducing case, and as arbitrary in claim 1 to 9 as described in centrifugal clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420472580.XU CN204083086U (en) | 2014-08-21 | 2014-08-21 | The electric tool of centrifugal clutch, variable speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420472580.XU CN204083086U (en) | 2014-08-21 | 2014-08-21 | The electric tool of centrifugal clutch, variable speed |
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| Publication Number | Publication Date |
|---|---|
| CN204083086U true CN204083086U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420472580.XU Active CN204083086U (en) | 2014-08-21 | 2014-08-21 | The electric tool of centrifugal clutch, variable speed |
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| CN (1) | CN204083086U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373523A (en) * | 2014-08-21 | 2015-02-25 | 舒捷医疗科技（苏州）有限公司 | Centrifugal clutch and speed-variable electric tool |
-
2014
- 2014-08-21 CN CN201420472580.XU patent/CN204083086U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373523A (en) * | 2014-08-21 | 2015-02-25 | 舒捷医疗科技（苏州）有限公司 | Centrifugal clutch and speed-variable electric tool |
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