CN201015864Y

CN201015864Y - Multifunctional percussion drilling

Info

Publication number: CN201015864Y
Application number: CNU2007200348369U
Authority: CN
Inventors: 孙开军
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2007-02-26
Filing date: 2007-02-26
Publication date: 2008-02-06
Anticipated expiration: 2017-02-26

Abstract

The utility model provides a multifunctional percussion drilling, which can switch over in the three modes of torque force mode, piercing mode and impulse mode. The utility model comprises a casing, a principal axis which can move in the axial direction and is arranged in the casing, an electric motor driving the principal axis, and an adjusting sleeve supported on the casing and can rotate around the longitudinal axial line, a rotatable switch loop which is provided with a first matching part installed on the principal axis, and a change over panel which is provided with a second matching part and is fixedly connected with the casing. The impact mechanism is used for driving the principle axis to move reciprocatedly along the axial direction. By rotating the adjusting sleeve along the same direction, the multifunctional percussion drilling can be embedded into torque force mode, piercing mode and impulse mode in turn. A toggle component is arranged on the adjusting sleeve. When rotating, the adjusting sleeve can optionally drive the switch loop to rotate, thereby making the first matching part match with the second matching part optionally.

Description

Multifunctional percussion drill

Technical field

The utility model relates to a kind of percussion drill, and especially relating to a kind of multifunctional percussion drill can be at torsion, creep into and impact under three kinds of mode of operations and work.

Background technology

At present, the traditional multifunctional percussion drill that occurs on the market has three kinds of mode of operations usually, and these three kinds of patterns are respectively torsion, creep into and impact.By rotating a torsion cover, can make percussion drill be in one of these three kinds of patterns.This percussion drill comprises a clutch mechanism, the main shaft that working head is installed, when torsion mode, by the rotary torsion cover, clutch mechanism can be operated to change the specified output torque of main shaft, load torque on putting on working head is during less than the specified output torque of main shaft, and clutch can not threaded off, and percussion drill can be worked under the torsion mode of setting; Load torque on putting on working head is during greater than the specified output torque of main shaft, and clutch can produce dropout, causes percussion drill not worked; When drill mode, can directly be passed to main shaft from the operation torque of motor; When conflicting model, main shaft can be made axially reciprocating.These multifunctional percussion drills can be so that percussion drill be in torsion successively, creeps into and conflicting model by the rotary torsion cover.When torsion mode, the rotary torsion cover, can make the specified output torque of main shaft increase gradually from minimum torsion shelves to the highest torsion shelves, from the torsion mode to the drill mode, the specified output torque of main shaft further increases, until conflicting model, make the specified output torque of main shaft reach maximum, yet it is in actual use,, big during than impact because the load torque that bears when creeping into is maximum usually, so when creeping into grade, clutch is easily threaded off, thereby makes percussion drill quit work, and influences operating efficiency.

Get out existing the problems referred to above in order to overcome conventional impact, U.S. Patent application US2004/0245005 discloses a kind of multifunctional percussion drill, and this percussion drill comprises a clutch mechanism, a function switching mechanism, a beater mechanism, the main shaft that working head is installed, a torsion cover.By rotating this torsion cover, clutch mechanism can be operated to change the specified output torque of main shaft.Beater mechanism comprises a quiet end tooth, a moved end tooth and a spring, makes it move the generation ballistic motion towards quiet end tooth direction thereby spring can compress the moved end tooth.Function switching mechanism comprises a conversion ring that is provided with groove, and this conversion ring is fixedly connected on the torsion cover and can rotates with the torsion cover, a changeover panel that is provided with projection, and projection contacts with conversion ring end face.One end of changeover panel is pushed down the conversion ring, the other end leans on mutually with the moved end tooth, thereby when driving the rotation of conversion ring by the rotary torsion cover, can corresponding cooperation when being located at groove on the conversion ring and being rotated certain angle with projection, this moment, spring pressed end tooth forward, moved end tooth and then pressure changeover panel, because projection and groove fit, thus changeover panel and moved end tooth all can move forward, the moved end tooth move to quiet end tooth near the time, can produce ballistic motion, make percussion drill be in conflicting model.Can be towards a direction rotary torsion cover so that percussion drill is in torsion, impact and drill mode successively.When torsion mode, the load torque on putting on main shaft is during greater than the specified output torque of main shaft, and clutch mechanism can be threaded off, and makes percussion drill quit work.Like this, when rotating to drill mode owing to the torsion cover, the specified output torque of main shaft is maximum, even the load torque that puts on the main shaft is very big, clutch also is not easy to thread off.Thereby solved conventional impact and got out the problem of easily threading off under the existing drill mode.But this percussion drill also brings a problem to be exactly, the projection of changeover panel cooperates with the conversion ring all the time, when the rotary torsion cover, the conversion ring can follow one to run up, thereby has frictional force to exist all the time between conversion ring and changeover panel projection, adds, spring one vertical compression the moved end tooth so that pressing changeover panel towards conversion ring direction near, thereby make the frictional force between conversion ring and the changeover panel projection strengthen, make that wearing and tearing are more serious between changeover panel and the conversion ring, thereby influence service life.

The utility model content

Technical problem to be solved in the utility model provides a kind of multifunctional percussion drill with function switching mechanism, and this function switching mechanism is not easy to wear, long service life.

In order to address the above problem, the utility model provides a kind of multifunctional percussion drill, this multifunctional percussion drill comprises casing, the axially movable main shaft that is positioned at casing, the motor that is used for drive shaft, the regulating sleeve that is supported on the described casing and can rotates around longitudinal axis, the rotatable conversion ring that is installed on the described main shaft, this conversion ring is provided with first counterpart, the changeover panel of fixedlying connected with casing, this changeover panel is provided with second counterpart, and beater mechanism is used for axially drive shaft repeatedly, by along a direction rotary regulating sleeve, this multifunctional percussion drill can be placed in the torsion shelves successively, impact shelves and creep into shelves, described regulating sleeve is provided with stirs element, and regulating sleeve selectable driving conversion ring in rotary course rotates, and the counterpart of winning is selectable to be cooperated with second counterpart thereby make.

In the multifunctional percussion drill that the utility model disclosed, have only and when regulating sleeve is rotated to certain position, just can drive the rotation of conversion ring to cooperate the conversion of generation function with changeover panel, and in other cases, the conversion ring all is relative static with changeover panel, between the two without any interaction force or frictional force, so conversion ring and changeover panel are not easy to wear, service life is longer.

Description of drawings

Figure 1A is multifunctional percussion drill that the utility model the disclosed cutaway view when 1 grade of the torsion shelves.

Figure 1B for multifunctional percussion drill that Figure 1A disclosed along A-A to sectional view.

Fig. 1 C is the schematic diagram of function switching mechanism when 1 grade of torsion shelves of the multifunctional percussion drill that the utility model disclosed.

Fig. 2 is the explosive view of the clutch mechanism of the multifunctional percussion drill that the utility model disclosed.

Fig. 3 is the function switching mechanism of the multifunctional percussion drill that the utility model disclosed and the explosive view of beater mechanism.

The cutaway view that Fig. 4 A is a multifunctional percussion drill that the utility model disclosed when 22 grades of torsion shelves.

The multifunctional percussion drill that Fig. 4 B is disclosed for Fig. 4 A along B-B to sectional view.

Fig. 5 A is the cutaway view of multifunctional percussion drill when impacting shelves that the utility model disclosed.

The multifunctional percussion drill that Fig. 5 B is disclosed for Fig. 5 A along C-C to sectional view.

Fig. 5 C is the schematic diagram of function switching mechanism when impacting shelves of the multifunctional percussion drill that the utility model disclosed.

The cutaway view that Fig. 6 A is a multifunctional percussion drill that the utility model disclosed when creeping into grade.

The multifunctional percussion drill that Fig. 6 B is disclosed for Fig. 6 A along D-D to sectional view.

Fig. 6 C is the schematic diagram of function switching mechanism when creeping into grade of the multifunctional percussion drill that the utility model disclosed.

Among the figure:

1. anterior 110. first host cavities of casing 11. casings

111. first slit, 112. second slits, 113. breach

12. casing rear portion 120. second host cavities, 121. transition end faces

122. axle head before through hole 2. main shafts 21.

22. back axle head 3. motors 30. motor output shafts

4. gearbox 40. gear box casings 41. first sun gears

41a. the first planetary gear 41b., the first annular internal tooth circle, 42. first planet carriers

42a. the second planetary gear 42b., the second annular internal tooth circle, 43. second planet carriers

43a. the third line star-wheel 43b. the 3rd annular internal tooth circle 44. the third line star framves

45. transfer panel 5. beater mechanisms 51. quiet end teeth

52. moved end tooth 53. impacts back-moving spring 6. function switching mechanisms

61. conversion ring 611. first inner chambers 612. second inner chambers

613. 615. groups of handle 616. boss of plane bearing

62. changeover panel 621. retaining elements 622. the 3rd inner chamber

623. the 4th inner chamber 624. grooves 63. torsion springs

7. clutch mechanism 70. slide surfaces 71. projectioies

72. steel column 73. pads 74. bracing rings

741. lug 75. clutch springs 76. screw-casings

761. lug 762. spring accepting grooves 8. torsion covers

80. flange 81. projection X. longitudinal axis

The specific embodiment

With reference to Figure 1A, a kind of three function percussion drills, can be operated at the torsion shelves, impact shelves and creep into one of three kinds of patterns of shelves and carry out work.This three functions percussion drill comprises casing 1, be contained in the main shaft 2 in the casing 1, the motor 3 that is used for drive shaft 2, the output speed that is used to change motor 3 between motor 3 and main shaft 2 makes the gearbox 4 of main shaft 2 exportable friction speeds, be used for axially the beater mechanism 5 of drive shaft 2 repeatedly, make this three functions percussion drill can produce the clutch mechanism 7 of dropout in the function switching mechanism 6 of switching between aforementioned three kinds of patterns and when making this three functions percussion drill at the torsion shelves.Motor 3 comprises motor output shaft 30, and gearbox 4 is connected with motor output shaft 30.The preceding axle head 21 of main shaft 2 is from the axial protruding chuck (not shown) that is used for installing of the front end of casing 1, and this chuck is to be used for accommodating working head for example screw screwdriver bit, drill bit etc.The back axle head 22 of main shaft is provided with external splines, is connected with gearbox 4 by this external splines.

Gearbox 4 is contained in the gear box casing 40, gearbox 4 comprises three grades of reducing gears, first order reducing gear comprises first sun gear 41 of fixedlying connected with motor output shaft 30, with some first planetary gear 41a of this first sun gear 41 engagements, with the first annular internal tooth circle 41b of these some first planetary gear 41a engagements and be used to support first planet carrier 42 of these some first planetary gears.Second level reducing gear comprises several second planetary gears 42a, these several second planetary gear 42a meshes with first planet carrier 42 that serves as second sun gear simultaneously, the second annular internal tooth circle 42b and second planetary gear 42a engagement, second planet carrier 43 is used to support some second planetary gear 42a; Third level reducing gear comprises several the third line star-wheels 43a, this several the third line star-wheel 43a and second planet carrier, 43 engagements of serving as the 3rd sun gear simultaneously, the 3rd annular internal tooth circle 43b and the third line star-wheel 43a engagement, the third line star frame 44 is used to support some the third line star-wheel 43a; Be fixedly connected with transfer panel 45 on the third line star frame 44, the external splines that transfer panel 45 inwalls are provided with on internal spline and the main shaft 2 back axle heads 22 is connected, makes main shaft 2 rotate also and can move axially with gearbox 4.

With reference to Fig. 2, casing 1 comprises casing anterior 11 and casing rear portion 12, the diameter of casing front portion 11 is less than the diameter at casing rear portion 12, casing front portion 11 is provided with first host cavity 110 and is used to accommodate main shaft 2, and casing rear portion 12 is provided with the third level reducing gear that second host cavity 120 is used to accommodate gearbox 4.Anterior 11 inner surface is along first slit 111 that circumferentially is arranged at intervals with three longitudinal extensions, and forward outer surface is provided with second slit 112 of six longitudinal extensions, and anterior 11 end faces are provided with breach 113, and breach 113 is offered angle along circumferential direction and roughly is 45 degree.Forwardly 11 are formed with transition end face 121 with rear portion 12 adjoiners, and transition end face 121 is provided with six through holes 122, and this six through holes 122 uniformly-spaced are provided with along circumferential direction, and each through hole 122 is communicated with second host cavity 120 respectively with second slit 112.Casing 1 is fixedlyed connected with gear box casing 40.

Clutch mechanism 7 comprises slide surface 70, steel column 72, pad 73, bracing ring 74, clutch spring 75 and the screw lid 76 that the front end face by the 3rd annular internal tooth circle 43b forms.Slide surface 70 is provided with six projectioies 71, and these six projectioies 71 circumferentially uniformly-spaced are provided with along slide surface 70, suppose that the height of each projection 71 is S1.The tip of steel column 72 is the bulb end, and the bulb end of steel column 72 cooperates with slide surface 70 and can slide along it, and steel column 72 places in the through hole 122 and can move axially along through hole 122, and the other end of steel column 72 is successively against living pad 73 and bracing ring 74.Bracing ring 74 upper edge circumferential direction are provided with six axially extended lugs 741 and are used to support clutch spring 75, the outer circumference surface of screw-casing 76 is provided with external screw thread, the front end face of screw-casing 76 is interval with six lugs that extend radially inwardly 761, on screw-casing 76 inwalls, each lug 761 backward longitudinal extension be provided with a spring accepting groove 762, each spring accepting groove 762 all be arranged at casing 1 anterior 11 outer surfaces on each second slit 112 corresponding, each lug 761 is accommodated in this second slit 112, make screw-casing 76 cannot rotate, only to move axially with respect to casing.Clutch spring 75 is to be made of six helical springs, each helical spring is sheathed on each lug 741, clutch spring 75 is arranged between the spring accepting groove 762 of second slit 112 and screw-casing 76 inwalls, one end of clutch spring 75 props up lug 761, and the other end of clutch spring 75 compresses bracing ring 74.

The three function percussion drills that present embodiment disclosed are to regulate by a torsion cover 8, thereby make percussion drill be in one of aforementioned three kinds of patterns.This torsion cover 8 is supported on the casing 1 by screw-casing 76.The inwall of torsion cover 8 is provided with flange 80, and flange 80 is divided into first half and latter half of with torsion cover 8, and the first half inner surface of torsion cover 8 is provided with the projection 81 that extends radially inwardly.The latter half of inner surface of torsion cover 8 is provided with the internal thread that the external screw thread with screw-casing 76 is complementary, and by rotary torsion cover 8, screw-casing 76 moves axially, compression clutch spring 75.Decrement by changing clutch spring 75 can be so that the biasing force that puts on the steel column 72 be changed, thereby changes the specified output torque of main shaft 2.When put on the main shaft 2 load torque hour, clutch spring 75 can be pushed down each steel column 72 makes the bulb end of steel column 72 and the front end slide surface 70 of the 3rd annular internal tooth circle closely cooperate, thereby prevent that the 3rd annular internal tooth circle 43b from rotating, this moment, driving force can be passed to output shaft 2 from motor 3.Load torque on putting on main shaft 2 is during more than or equal to specified output torque, steel column 72 retreats compression spring 75, and the bulb end of steel column 72 can get over projection 71, thereby make the 3rd annular internal tooth circle 43b idle running, power output from motor 3 can't be passed to main shaft 2, and percussion drill quits work.

With reference to Fig. 3, beater mechanism 5 comprises 51, one moved end teeth 52 of a quiet end tooth.Quiet end tooth 51 is fixedly connected on the casing 1.Moved end tooth 52 is fixedly connected on the main shaft 2, can rotate around longitudinal axis X with main shaft 2, and can be with main shaft 2 axially reciprocatings.Being provided with an impact back-moving spring 53 between quiet end tooth 51 and moved end tooth 52 is used for making quiet end tooth 51 and moved end tooth 52 to maintain a certain distance.

Function switching mechanism 6 comprises 61 and changeover panels 62 of a conversion ring, and conversion ring 61 and changeover panel 62 all are set on the main shaft 2.The leading section of this conversion ring 61 is formed with first inner chamber 611, the rearward end of conversion ring is formed with second inner chamber 612, the diameter of first inner chamber 611 is greater than the diameter of second inner chamber 612, plane bearing 613 is set in the front end of main shaft and is accommodated in and is used for connecting conversion ring 61 and main shaft 2 in first inner chamber 612, make conversion ring 61 to rotate with respect to main shaft 2, but can not move axially with respect to main shaft 2, main shaft 2 directly passes second inner chamber 612, makes 61 loose fits of conversion ring on main shaft 2.Extended radially outwardly one to fall " Z " shape and dial handle 615 at the leading section of conversion ring 61, this group handle 615 is accommodated in the anterior breach 113 of casing, can rotate in a circumferential direction in these breach 113 scopes.Three boss 616 that axially extended back on the rear end face of conversion ring 61, these three boss 616 circumferentially uniformly-spaced are provided with along the end face of conversion ring 61.The leading section of changeover panel 62 is formed with the 3rd inner chamber 622, the rearward end of changeover panel 62 is formed with the 4th inner chamber 623, main shaft 2 directly passes the 4th inner chamber 623, make changeover panel 62 loose fits on main shaft, the diameter of the 3rd inner chamber 622 is greater than the diameter of the 4th inner chamber 623, extend radially outwardly on the outer circumference surface of changeover panel 62 and be provided with three retaining elements 621, these three retaining elements 621 are accommodated in first slit 111 of three longitudinal extensions of anterior 11 inner surfaces of casing, and main shaft 2 is accommodated in the casing 1 and can moves axially with respect to casing 1.The front end face of changeover panel 62 is provided with three openings towards preceding groove 624, and these three grooves 624 are used for matching with three boss 616 that are arranged at conversion ring rear end face along circumferential equally spaced setting.Be provided with a torsion spring 63 between conversion ring 61 and changeover panel 62, an end of torsion spring 63 is connected on the rear end face of changing ring 61 and compresses this conversion ring 61 forward, and the other end of torsion spring 63 is contained in and also compresses changeover panel 62 in the 3rd inner chamber 622 backward.

State diagram when being depicted as percussion drill and being in 1 grade of torsion shelves as Figure 1A to 1C, this moment, screw-casing 76 was in torsion cover 8 foremost, suppose that the distance between screw-casing 76 rear ends and the bracing ring 74 is S2, this moment, S2 was maximum, and greater than projection 71 height S1, when 1 grade of torsion shelves, the decrement minimum of clutch spring 75, and so the power that the compresses minimum of 75 pairs of steel columns 72 of clutch spring this moment is specified output torque minimum.Load torque on putting on main shaft 2 is during greater than 1 grade of nominal torque, steel column 72 can promote bracing ring 74 and move forward, and this moment, steel column 72 can get over projection 71, thereby makes the 3rd annular internal tooth circle 43b idle running, this moment, motor 3 power outputs can't be passed to main shaft 2, and percussion drill quits work.In the time of 1 grade, boss 616 on the conversion ring 61 pastes mutually with changeover panel 62 front end faces, and main shaft 2 can not move axially, and owing to the effect of impacting back-moving spring 53 keep certain clearance exist between moved end tooth 52 and the quiet end tooth 51 this moment, can not mesh, and then not produce impact.And be positioned at this moment and dial handle 615 clockwise directions farthest on the projection 81 distance conversion ring 61 on torsion cover 8 inwalls along circumferential distance, in the time of 1 grade, the torsion cover 8 that turns clockwise, torsion cover 8 can not stirred handle 615 and then drive 61 rotations of conversion ring, switch so Shi Buhui carries out function.

When turning clockwise torsion cover 8, screw-casing 76 can axially move backward, compression clutch spring 75, clutch spring 75 promotes steel column 72 by bracing ring 74 and pad 73 then and compresses slide surface 70, the power of compressing of the different sizes of 75 pairs of slide surfaces 70 of clutch spring make the specified output torque difference of main shaft 2, it is big more that spring compresses power, and the specified output torque of main shaft 2 is just big more.

State diagram when being depicted as percussion drill and being in 22 grades of torsion shelves as Fig. 4 A to 4B, be the highest torsion shelves in the present embodiment, with respect to 1 grade of torsion shelves, diminishing between screw-casing 76 rear ends and the bracing ring 74 apart from S2, but S2 is still greater than projection 71 height S1, identical during with 1 grade, load torque on putting on main shaft 2 is during greater than 22 grades of specified output torques, steel column 72 can promote bracing ring 74 and move forward, this moment, steel column 72 can get over projection 71, thereby make the 3rd annular internal tooth circle 43b idle running, this moment, motor 3 power outputs can't be passed to main shaft 2, and percussion drill quits work.Identical during with 1 grade, the boss 616 of conversion ring 61 rear end faces pastes mutually with the front end face of changeover panel 62, and main shaft 2 can not move axially, owing to impact the effect of back-moving spring 53 maintain certain clearance between moved end tooth 52 and the quiet end tooth 51 this moment, can not mesh, and then not produce impact.At this moment, torsion cover 8 is through turning clockwise, and the projection 81 that is positioned on torsion cover 8 inwalls is near along circumferential distance change apart from group handle 615 clockwise directions of changing on the ring 61, but this projection 81 does not contact with group handle 615 yet.

Shown in Fig. 5 A to 5C, torsion cover 8 continues to turn clockwise, when being in 22 grades of torsion shelves and impact between the shelves certain precalculated position, the projection of being located on torsion cover 8 inwalls 81 cooperates with the handle 615 of dialling on being located at conversion ring 61, when continuing rotary torsion cover 8 again, projection 81 can be stirred handle 615, and then stir conversion ring 61 and rotate, when torsion cover 8 rotates to the impact shelves, boss 616 on the conversion ring 61 can be corresponding with the groove 624 on the changeover panel 62, main shaft 2 just can move axially like this, and drives end tooth 52 and move, and makes moved

end tooth

52 and 51 engagements of quiet end tooth produce and impacts.This moment screw-casing 76 continue compression clutch springs 75 make between screw-casing 76 rear ends and the bracing ring 74 apart from S2 less than protruding 71 height S1, and when impact conditions, load torque is not maximum, so the time steel column 72 be difficult for getting over projection 71, clutch is difficult for threading off.

Shown in Fig. 6 A to 6C, from impacting the shelves torsion cover 8 that continues to turn clockwise, the projection 81 of being located at torsion cover 8 inwalls continues to stir 61 rotations of conversion ring, when torsion cover 8 is in when creeping into grade, be located at the groove 624 that the boss 616 on the conversion ring 61 crosses on the changeover panel 62 and paste mutually with changeover panel 62 front end faces, this moment, main shaft 2 can not move axially, between moved end tooth 52 and the quiet end tooth 51 owing to impact the effect maintenance certain clearance existence of back-moving spring 53, can not mesh, and then not produce impact.Distance between this moment screw-casing 76 rear ends and the bracing ring 74 is near 0, much smaller than height of projection S1, even so the time main shaft 2 load torque that is subjected to bigger, can not produce dropout yet.

Claims

1. multifunctional percussion drill, comprise: casing (1), the axially movable main shaft that is positioned at casing (2), the motor (3) that is used for drive shaft, being supported on described casing (1) upward also can be around the regulating sleeve (8) of longitudinal axis (x) rotation, the rotatable conversion ring (61) that is installed on the described main shaft (2), this conversion ring (61) is provided with first counterpart (616), the changeover panel (62) of fixedlying connected with casing (1), this changeover panel (62) is provided with second counterpart (624), beater mechanism (5) is used for axially repeatedly drive shaft (2), by along a direction rotary regulating sleeve (8), this multifunctional percussion drill can be placed in the torsion shelves successively, impact shelves and creep into shelves, it is characterized in that: described regulating sleeve (8) is provided with stirs element (81), regulating sleeve (8) selectable driving conversion ring in rotary course rotates, and the counterpart of winning (616) is selectable to be cooperated with second counterpart (624) thereby make.

2. multifunctional percussion drill according to claim 1 is characterized in that: described beater mechanism (5) comprises the moved end tooth (52) that is fixedly connected on the main shaft (2) and is fixedly connected on quiet end tooth (51) on the casing.

3. multifunctional percussion drill according to claim 2, it is characterized in that: described changeover panel (62) is positioned between described moved end tooth (52) and the described conversion ring (61), the circumferential exterior surface of changeover panel (62) is provided with the retaining element (621) of fixedlying connected with casing (1), is respectively equipped with described second counterpart (624) and first counterpart (616) on the end face in opposite directions of changeover panel (62) and conversion ring (61).

4. multifunctional percussion drill according to claim 3 is characterized in that: described first counterpart (616) is a boss, and described second counterpart (624) is a groove.

5. multifunctional percussion drill according to claim 4 is characterized in that: described boss (616) circumferentially uniformly-spaced is provided with three along conversion ring (61) end face, and described groove (624) circumferentially uniformly-spaced is provided with three along changeover panel (62) end face accordingly.

6. multifunctional percussion drill according to claim 1 is characterized in that: be provided with reposition element (63) between described conversion ring (61) and the changeover panel (62).

7. multifunctional percussion drill according to claim 6 is characterized in that: described reposition element (63) is a torsion spring.

8. multifunctional percussion drill according to claim 1, it is characterized in that: the described element (81) of stirring is for being located at the projection of regulating sleeve inwall, described conversion ring (61) is provided with dials handle (615), when rotary regulating sleeve (8) to the torsion shelves with when impacting between the shelves, described projection (81) cooperates with described group of handle (615) to be stirred conversion and encircles (61) and rotate.

9. multifunctional percussion drill according to claim 8 is characterized in that: described casing (1) leading section is provided with opening, and described group of handle (615) is positioned at opening, and this group handle (615) is along circumferentially rotating in this opening.

10. multifunctional percussion drill according to claim 1 is characterized in that: be provided with bearing (613) between described conversion ring (61) and the main shaft (2).