CN2382515Y

CN2382515Y - Knob switching device

Info

Publication number: CN2382515Y
Application number: CN 99216759
Authority: CN
Inventors: 钟李杏枝
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-16
Filing date: 1999-07-16
Publication date: 2000-06-14
Anticipated expiration: 2009-07-16

Abstract

The utility model belongs to the design field of an electric tool. The inner part of a speed reducing box cover is fixedly provided with a switching seat; an axial surface of the switching seat is provided with two paths of a plurality of switching concave teeth which present the proper spacing and are arranged in annular-circumference way; an inclined edge can be formed at the same side of the switching concave teeth; the inclined edge is used for being matched with a plurality of switching convex teeth corresponding to the switching concave teeth; the switching convex teeth are arranged on an axial surface corresponding to a switching block of the switching seat; when the switching block obtains the rotation, the switching block can control that the switching convex teeth are engaged with or disengaged from the switching concave teeth and can make the switching convex teeth obtain the average stress, so that the utility model can control the axial moving quantity of an output axle. The utility model can simplify the whole structure, so that the utility model can reduce the manufacturing cost.

Description

The knob switching device shifter

The utility model belongs to the electric tool structure design field, relate to a kind of output shaft that knob can be done 360 ° of rotations and adjust electric tool and hold concurrently in simple rotation and rotation and do between the vibrations to switch, and its structure more simple and device that can reduce cost of routine.

In early days, only can do simple rotation, but some object may be locked to such an extent that too tightly be not easy to hole or screw is screwed out because of the cause or the screw of material in order to the electric tool that drives screwdriver heads or drill bit; So just developed afterwards the electric tool output shaft to be set between simple rotation or the double vibrations of rotation and did switching, the attempt nationality is done axially vibrations fast and drill bit can be squeezed into drilled object by output shaft in rotation, maybe will lock to such an extent that too tight screw is become flexible and is convenient to screw out.Therefore just have a patent case to provide and have the knob switching device shifter that rotates with vibrating effect concurrently, it can allow this output shaft do switching between simple rotation and vibrations, uses making the operation of electric tool more convenient, has more practicality.Yet, be simple rotation or vibrations because the structure of above-mentioned patent case must make knob can switch its output shaft after rotating about 360 °, and its employed element is more, overall structure is comparatively complicated, causes manufacturing cost higher.

The purpose of this utility model is to propose a kind of knob switching device shifter that gear box cover, switching seat, the recessed tooth of switching and switching double wedge are formed that includes, it can have been saved by steering ring, inner circular tooth, central gear and revolve the deceleration devices that element constituted such as ring, and structure is more simplified.Thereby solved the existing in prior technology problem.

The technical scheme that the utility model adopted is that it includes: one has the gear box cover of cylindrical shell, is provided with a plurality of recessed teeth around the end of this cylindrical shell; One is matched with the steel ball pressure ring of the cylindrical shell external diameter of this gear box cover; One can be placed on the cylindrical shell external diameter of this gear box cover and be butted on the spring of described steel ball pressure ring; The one cylindrical shell external diameter that can be placed on this gear box cover is free to rotate and is butted on the said spring thrust ring of end in addition; One can be matched with the switching seat and the handoff block of the cylinder internal diameter of said gear box cover; Be formed with tooth portion one end loops week and for being installed in the vibration seat of said gear box cover internal diameter, and this vibrating mass and the tooth portion of vibration seat are corresponded to each other; One output shaft, it wears a spring in regular turn, is combined in the cylinder internal diameter of said gear box cover behind above-mentioned switching seat, handoff block, vibrating mass and the vibration seat; One switching device shifter, it includes a thrust ring, an one thrust upper plate and a knob, the multiple tracks that is formed with in preceding end ring week of this thrust ring lays respectively at and does not wait external diameter, and the spiral track that is continuous not equal altitude respectively, this thrust ring can be sheathed on the cylindrical shell external diameter of said gear box cover and rotate freely, this thrust upper plate is to form a ring frame, but the internal diameter of this ring frame is the fit corresponding to the cylindrical shell external diameter of above-mentioned gear box cover just, front end at this ring frame is provided with a recess, the rear end of ring frame then is provided with a plurality of protuberances that can be matched with the spiral track of said thrust ring respectively, this knob said thrust ring outside that is coated and fixed, its characteristics are: an axial vane surface of this switching seat is provided with two roads and is the recessed tooth of arranging in suitable spacing ground ring week of a plurality of switchings, and the mutually same side of the recessed tooth of this switching is to form hypotenuse, the axial vane surface of this handoff block is provided with the switching double wedge of two roads corresponding to the recessed tooth of above-mentioned switching, use to control this switchings double wedge engagement when this switching seat is relatively rotated with handoff block or break away from this and switch recessed tooth, and then control this switching and whether axially promoted.

Can control this switching double wedge engagement when characteristics of the present utility model are to make handoff block to be subjected to rotating or break away from this and switch recessed tooth and average force, and then the axial internal clearance of control output shaft, the vibrating mass that is installed in output shaft with decision whether can be when the output axial compression be touched and is turned round and vibrating mass be meshing with each other and cause shock effect, and use and can save by steering ring, inner circular tooth, central gear and revolve the deceleration devices that element constituted such as ring, simplified whole structure.

Fig. 1 is the three-dimensional exploded view of each element syntagmatic of the utility model.

Fig. 2 is the structure after the element combination of Fig. 1, and the section plan of knob when not switching.

Fig. 3 is the plan cross-section action diagram of the knob of Fig. 2 when switching.

Fig. 4 is switching seat of the present utility model and switching block structured stereogram.

Fig. 5 is the plan view of the switching double wedge arrangement form of handoff block of the present utility model.

Further specify preferred embodiment of the present utility model in conjunction with above-mentioned each accompanying drawing now.

As Fig. 1 and shown in Figure 3, knob switching device shifter provided by the utility model appends one, be to include a gear box cover 1, these gear box cover 1 one ends are integrally formed with the cylindrical shell 11 that is hollow in one and runs through, and the internal diameter front portion of this cylindrical shell 11 is formed with inner edge 112, and around this inner edge 112, be provided with several internal channel axial and parallel to each other 113, the outside wall surface of this cylindrical shell 11 is provided with several outer channel axial and parallel to each other 111, a holder 48 is then made up in the rear end of this gear box cover 1, these holder 48 set tube portions are that the internal diameter and the packing of being inserted in the fast case lid 1 that slows down are fixed, and the tooth portion 481 that the front end of this holder 48 is one-body molded around having.Cylindrical shell 11 external diameters of this gear box cover 1 are arranged with a steel ball pressure ring 12, a spring 13 and a thrust ring 14 in regular turn; These steel ball pressure ring 12 rear ends are provided with the ring flange 121 in week, and in being provided with a plurality of teats 122 its internal diameter ring week corresponding to above-mentioned outer channel 111, make this teat 122 slip into and steel ball pressure ring 12 is inserted in cylindrical shell 11, and then this steel ball pressure ring 12 can't be rotated with respect to cylindrical shell 11 along outer channel 111.13 on this spring makes the one end contact at the flange 121 of steel ball pressure ring 12 after being inserted in cylindrical shell 11.These thrust ring 14 outsides are provided with several tabs 141, and being formed with three roads preceding end ring week is distributed in and does not wait external diameter, and the spiral track that is continuous not equal altitude respectively, this spiral track is formed with a spiral track lower curtate 142 and the high portion 143 of a spiral track, the internal diameter of this thrust ring 14 just can be inserted in the external diameter of cylindrical shell 11 and contact at holding in addition of spring 13, and this thrust ring 14 can rotate with respect to cylindrical shell 11.Be provided with output shaft 3 in the internal diameter of this gear box cover 1, and wear spring 41, pad 42, steel ball 43, pad 44, handoff block 45 from front to back in regular turn, switch seat 47 and vibrating mass 46 with this output shaft 3; Wherein, this vibrating mass 46 is fixed on the output shaft 3, and is formed with engageablely in the above-mentioned tooth portion 461 that is located at vibration seat 48 tooth portions 481 around the rear end of vibrating mass 46, and this vibrating mass 46 can be inserted in the through hole of gear box cover 1 fully.Pedestal 471 external surface peripherals of this switching seat 47 are provided with several shape projections 473, as shown in Figure 4, front end then is provided with two roads and is the recessed tooth of arranging 472 of switching on every side, the projection 473 of this switching seat 47 can be inserted in the through hole of gear box cover 1 along this internal channel 112, and can prevent to switch seat 47 in gear box cover 1 inward turning then fixing.This vibrating mass 46 is for being matched with in the through hole front end of this gear box cover 1, and its rear end is provided with two roads and is and arranges on every side and corresponding to the switching double wedge 452 of the recessed tooth 472 of above-mentioned switching, the mutually same side of this switching double wedge 452 forms hypotenuse, as shown in Figure 5.The outside of this handoff block 45 is provided with several breach 451.This two pad the 42, the 44th is positioned at two sides of steel ball 43 and places this handoff block 45 jointly.41 on spring is butted between the flange of this pad 42 and output shaft 3, acts on pad 42 by the elastic force of this spring 41, and then makes the switching double wedge 452 of handoff block 45 remain on the trend that is contacted with the axial vane surface that switches seat 47 constantly.

The utility model is provided with switching device shifter 2 at the front end of this gear box cover 1, and this switching device shifter 2 includes a thrust ring 14, a thrust upper plate 24 and a knob 5; Wherein, this thrust ring 14 is provided with the spiral track that three roads lay respectively at the various outer diameter position and are continuous not equal altitude respectively at the front end that forms the ring frame, each spiral track all has a high portion 143 of a spiral track and a spiral track lower curtate 142, and this thrust ring 14 can be sheathed on cylindrical shell 11 external diameters of gear box cover 1 and rotate freely.This thrust upper plate 24 is provided with a bulge loop 241 at the front end that forms the ring frame, but its ring frame internal diameter is the fit corresponding to cylindrical shell 11 external diameters of gear box cover 1 just, and be provided with a recess 242 in this bulge loop 241, the rear end of ring frame then is provided with three protuberances 243 that can be matched with three road spiral track of above-mentioned thrust ring 14 respectively, ring frame internal diameter in this thrust upper plate 24 is provided with several road pieces 244 corresponding to the outer channel 111 of gear box cover 1 in addition, after making that this thrust upper plate 24 is sleeved on this cylindrical shell 11,, its guide block 244 can not relatively rotate with cylindrical shell 11 by being matched with the outer channel 111 of cylindrical shell 11.This knob 5 is that wrap is located at this thrust ring 14 and thrust upper plate 24 outsides, and makes this thrust ring 14 be fixedly arranged on the inner edge of this knob 5, rotates by rotation knob 5 controlled prevention throw-out collars 14.When making thrust ring 14 rotations when clockwise rotating knob 5, the teat 243 that can make this thrust upper plate 24 is along the helical orbit of thrust ring 14 and move to the high portion 143 of spiral track by its spiral track lower curtate 142, or move to spiral track lower curtate 142 by the high portion 143 of spiral track, to push away the rotary torsion of pulling this spring 13 and being adjusted output shaft 3; In this simultaneously, the switching double wedge 452 of this handoff block 45 can be switched to the recessed tooth 472 of switching that falls into switching seat 47 and spring 41 is upheld, thereby make to have enough spaces that moves axially between the internal diameter of the flange of output shaft 3 and handoff block 45, as shown in Figure 2, thereby when the user touches output shaft 3 axial pressures in screw or other element, vibrating mass 46 is moved axially along with output shaft 3 and make tooth portion 481 engagements of its tooth portion 461 and vibration seat 48, can cause the axial vibration effect when making output shaft 3 rotations.At this moment, spring 13 forward actions move forward in this thrust ring 14, and the strength that makes spring 13 act on the rear end diminishes and adjusts outputting torsion (this principle partly is owing to non-demand emphasis of the present utility model, so will not give unnecessary details).

When not producing axial vibrations when desiring to make output shaft 3 only do simple rotation, then knob 5 will be driven thrust ring 14 simultaneously with this knob 5 of counter rotation rotates, and then the screw thread that makes this thrust ring 14 revolves rail and pushes away the teat 243 of the thrust upper plate 24 of pulling and thrust upper plate 24 forward end are moved axially, till teat 243 moves to spiral track lower curtate 142; This handoff block 45 also is driven in rotation simultaneously, can be pushed away the recessed tooth 472 of switching that switches seat 47 by the hypotenuse that switches double wedge 452, this moment, this handoff block 45 was promptly compressed this spring 41, thereby make between the flange of output shaft 3 and handoff block 45 inner edges and do not have enough spaces, by this, when pressing output shaft 3, the user touches when operating in screw or other mechanical organ, this output shaft 3 can't drive vibrating mass 46 and move axially, thereby do not mesh with the tooth portion 481 of vibration seat 48, so output shaft 3 does not only produce the axial vibration effect for simple rotation when rotated.And by several switching double wedges 452 and the recessed tooth 472 of switching of enclosing arrangement at 47 two road rings that are provided with respectively of handoff block 45 and switching seat, can be allowed to condition at each other and to break away from but effect that its axial vane surface has average force when still contacting relatively, can reach the effect of stable rotation according to this, and design can be omitted the deceleration device that former female case comprises by this, simplifies whole structure according to this and reduces manufacturing cost.

More than said only in order to separate preferred embodiment of the present utility model; be not that attempt is done any pro forma restriction to the utility model according to this; so, all have in that identical creation spirit is following do relevant any modification or change, all must be included in the protection domain of the utility model claim.

Claims

1. knob switching device shifter, include: one has the gear box cover of cylindrical shell, and the end loops week of this cylindrical shell is provided with a plurality of recessed teeth; One is matched with the steel ball pressure ring of the cylindrical shell external diameter of this gear box cover; One can be placed on the cylindrical shell external diameter of this gear box cover and be butted on the spring 13 of above-mentioned steel ball pressure ring; The one cylindrical shell external diameter that can be placed on this gear box cover is free to rotate and is butted on above-mentioned spring 13 thrust ring of end in addition; One can be matched with the switching seat and the handoff block of the cylinder internal diameter of above-mentioned gear box cover; Be formed with the vibrating mass that tooth portion and confession are installed in above-mentioned gear box cover internal diameter one end loops week; Be formed with tooth portion one end loops week and for being installed in the vibration seat of above-mentioned gear box cover internal diameter, and this vibrating mass and the tooth portion of vibration seat are corresponded to each other; One output shaft, it wears a spring 41 in regular turn, is combined in the cylinder internal diameter of above-mentioned gear box cover behind above-mentioned switching seat, handoff block, vibrating mass and the vibration seat; One switching device shifter, it includes a thrust ring, an one thrust upper plate and a knob, the multiple tracks that is formed with in preceding end ring week of this thrust ring lays respectively at and does not wait external diameter, and the spiral track that is continuous not equal altitude respectively, this thrust ring can be sheathed on the cylindrical shell external diameter of said gear box cover and rotate freely, this thrust upper plate is to form a ring frame, but the internal diameter of this ring frame is the fit corresponding to the cylindrical shell external diameter of above-mentioned gear box cover just, front end in this ring frame is provided with a recess, the rear end of ring frame then is provided with a plurality of protuberances that can be matched with the spiral track of above-mentioned thrust ring respectively, this knob is coated and fixed on above-mentioned thrust ring outside, it is characterized in that: an axial vane surface of this switching seat is provided with two roads and is the recessed tooth of arranging in suitable spacing ground ring week of a plurality of switchings, and the mutually same side of the recessed tooth of this switching is to form hypotenuse, and an axial vane surface of this handoff block is provided with the switching double wedge of two roads corresponding to the recessed tooth of above-mentioned switching.