CN202239760U

CN202239760U - Double-speed electric impact drill

Info

Publication number: CN202239760U
Application number: CN201120251323XU
Authority: CN
Inventors: 姜卫亮
Original assignee: JIAHE TOOLS CO Ltd
Current assignee: JIAHE TOOLS CO Ltd
Priority date: 2011-07-14
Filing date: 2011-07-14
Publication date: 2012-05-30
Anticipated expiration: 2021-07-14

Abstract

The utility model discloses a double-speed electric impact drill which comprises a rotor (1), an impact dialing knob (2), a first gear (3), a second gear (4), a third gear (5), a clutch (6), a fourth gear (7), a fixed impact gear (8), a moving impact gear (9), an output shaft (10), a middle base (11), a shifter fork pin (12), a gear shift knob (13), a shifter fork (14) and a gear shaft (15), wherein clutch pins (17) which are matched with the third gear (5) and the fourth gear (7) are correspondingly arranged at the two sides of the clutch (6), an annular shifter groove (16) is arranged on the outer circle of the clutch (6), an upper and a lower shifter fork heads (18) are symmetrically arranged on the shifter fork (14), and the upper and the lower symmetrical shifter fork heads (18) are correspondingly arranged in the annular shifter groove (16) on the central axis of the clutch (6). After the structure in such a way is adopted, the double-speed electric impact drill has the advantages of simple and reasonable structure, stability in switching, flexibility and convenience in operation, long service life and the like.

Description

The double speed electric impact drill

Technical field

The utility model relates to a kind of electric tool, the particularly a kind of double speed electric impact drill that can adjust the electric drill rotating speed according to the different operating material.

Background technology

Along with the development of society and the progress of science and technology, the technology of double speed electric impact drill reaches its maturity, and the structure of existing double speed electric impact drill comprises housing, stator, rotor, head capsule, impact toggle, first gear, second gear, the 3rd gear, clutch, the 4th gear, quiet impact gear, moving gear, output shaft, middle base, shifting fork pin, gear knob, shift fork, the gear shaft of impacting; Shifting fork pin is fixed between middle base and the head capsule, and shift fork is movably set on the shifting fork pin, and clutch is connected on the output shaft through spline; The 3rd gear and the 4th geared sleeve are located on the output shaft of clutch both sides; Second gear and gear shaft are connected as a single entity and are fixed on first gear, second gear and the 3rd gears engaged, gear shaft with the 4th gears engaged; The both sides correspondence of said clutch is provided with the on-of pin with the 3rd gear and the 4th gear matched; The cylindrical of clutch is provided with annular allocating slot, and the shift fork head of shift fork radially is inserted in the annular allocating slot of clutch, the main weak point of its existence: the one, because shift fork contacts with clutch is radially monolateral; In handoff procedure; The monolateral stressed back of clutch produces deflection, and sliding friction power increases, and can cause clutch slip dumb; Switch inconvenience, be difficult to realize gear switch during shutdown; The 2nd, because clutch slip is dumb, in handoff procedure, firmly rotate the gear knob, cause the shift fork torsional deformation and can not use.To the problems referred to above, many manufacturers and knowledgeable people develop specially and develop, but in the market desirable solution are not arranged as yet so far.

Summary of the invention

For overcoming the problems referred to above that existing double speed electric impact drill exists, the purpose of the utility model provide a kind of simple and reasonable, switch stress balance, double speed electric impact drill that flexible operation is light.

The utility model solves the technical scheme that its technical problem adopted; It comprises rotor, impact toggle, first gear, second gear, the 3rd gear, clutch, the 4th gear, quiet impact gear, moving gear, output shaft, middle base, shifting fork pin, gear knob, shift fork, the gear shaft of impacting; Shifting fork pin is fixed between middle base and the head capsule, and shift fork is movably set on the shifting fork pin, and clutch is connected on the output shaft through spline; The 3rd gear and the 4th geared sleeve are located on the output shaft of clutch both sides; Second gear and gear shaft are connected as a single entity and are fixed on first gear, second gear and the 3rd gears engaged, gear shaft and the 4th gears engaged; The both sides correspondence of said clutch is provided with the on-of pin with the 3rd gear and the 4th gear matched; The cylindrical of clutch is provided with annular allocating slot, and shift fork is provided with laterally zygomorphic shift fork head, and laterally zygomorphic shift fork head correspondence is arranged in the annular allocating slot of clutch core axis.

After adopting said structure, following advantage and effect are relatively arranged with prior art:

The one, because shift fork is provided with laterally zygomorphic shift fork head and is arranged in the annular allocating slot of clutch core axis; Shift fork and clutch change two stress points into by a stress point; Make clutch stress balance in speed regulation process, it is light flexibly to slide, and also can switch gear during shutdown.

The 2nd, because the clutch stress balance can not produce deflection, friction is little, and is easy to operate, and shift fork can not damage by torsional deformation.

Description of drawings

Fig. 1 is the prior art constructions sketch map.

Fig. 2 is the structural representation of the utility model.

Fig. 3 is the structural representation of the utility model shift fork.

Wherein: 1 rotor, 2 impact toggle, 3 first gears, 4 second gears, 5 the 3rd gears, 6 clutches; 7 the 4th gears, 8 quiet impact gears, 9 moving gear, 10 output shafts, 11 middle base, 12 shifting fork pin of impacting; 13 gear knobs, 14 shift forks, 15 gear shafts, 16 annular allocating slots, 17 on-of pins, 8 shift fork heads.

The specific embodiment

Fig. 2 and shown in Figure 3; Specific embodiments for a kind of double speed electric impact drill of the utility model; It comprises housing, head capsule, drill chuck, stator, rotor 1, impact toggle 2, first gear 3, second gear 4, the 3rd gear 5, clutch 6, the 4th gear 7, quiet impact gear 8, moving gear 9, output shaft 10, middle base 11, shifting fork pin 12, gear knob 13, shift fork 14, the gear shaft 15 of impacting; Shifting fork pin 12 is fixed between middle base 11 and the head capsule, and shift fork 14 is movably set on the shifting fork pin 12, and clutch 6 is connected on the output shaft 10 through spline; The 3rd gear 5 and the 4th gear 7 are set on the output shaft 10 of clutch 6 both sides; Second gear 4 is connected as a single entity with gear shaft 15 and is fixed on first gear 3,

second gear

4 and 5 engagements of the 3rd gear, the meshing with the 4th gear 7 of gear shaft 15; The both sides correspondence of said clutch 6 is provided with the on-of pin 17 that cooperates with the 3rd gear 5 and the 4th gear 7; The cylindrical of clutch 6 is provided with annular allocating slot 16, and shift fork 14 is provided with laterally zygomorphic shift fork head 18, and laterally zygomorphic shift fork head 18 correspondences are arranged in the annular allocating slot 16 of clutch 6 central axis.

The double speed percussion drill of the utility model is realized impacting with impact function not and is switched through impacting toggle 2: impact toggle 2 and shift onto when not impacting shelves and promptly seeking loopholes, impact that toggle 2 is pushed output shaft 10 open through steel ball and the moving gear 9 that impacts is realized a rotating function.Otherwise, impacting toggle 2 and shift onto when impacting shelves, steel ball is inoperative, moving impact gear 9 and quiet impact gear 8 engagements, thus realize impacting spinfunction.

The double speed percussion drill of the utility model is realized speed changing function through operation gear knob 13, the structural representation when being illustrated in figure 2 as output first rotating speed, and this moment, clutch 6 combined with the 3rd gear 5; During work; Rotor 1 drives 3 rotations of first gear, also coaxial being fixed on first gear 3 because second gear 4 and gear shaft 15 are connected as a single entity, so; Second gear 4 rotates with gear shaft 15 synchronously; Second gear 4 drives clutch 6 through the 3rd gear 5, and clutch 6 drives the output shaft rotary work through spline and exports first rotating speed, and gear shaft 15 drives 7 idle running of the 4th gear simultaneously.

When needs second working speed, rotate gear knob 13, gear knob 13 drives shift fork 14 and moves right; Clutch 6 separates with the 3rd gear 5 under shift fork 14 laterally zygomorphic shift fork heads 18 drive and combines with the 4th gear 7, and during work, rotor 1 drives 3 rotations of first gear; Because second gear 4 is connected as a single entity and coaxial being fixed on first gear 3 with gear shaft 15; So second gear 4 rotates with gear shaft 15 synchronously, second gear 4 drives 5 idle running of the 3rd gear; Gear shaft 15 drives clutch 6 through the 4th gear 7, and clutch 6 drives the output shaft rotary work through spline and exports second rotating speed.

Claims

1. double speed electric impact drill; Comprise rotor (1), impact toggle (2), first gear (3), second gear (4), the 3rd gear (5), clutch (6), the 4th gear (7), quiet impact gear (8), moving gear (9), output shaft (10), middle base (11), shifting fork pin (12), gear knob (13), shift fork (14), the gear shaft (15) of impacting; Shifting fork pin (12) is fixed between middle base (11) and the head capsule; Shift fork (14) is movably set on the shifting fork pin (12); Clutch (6) is connected on the output shaft (10) through spline, and the 3rd gear (5) and the 4th gear (7) are set on the output shaft (10) of clutch (6) both sides, and second gear (4) and gear shaft (15) are connected as a single entity and are fixed on first gear (3); Second gear (4) and the 3rd gear (5) engagement; Gear shaft (15) and the 4th gear (7) engagement, it is characterized in that: the both sides correspondence of said clutch (6) is provided with the on-of pin (17) that cooperates with the 3rd gear (5) and the 4th gear (7), and the cylindrical of clutch (6) is provided with annular allocating slot (16); Shift fork (14) is provided with laterally zygomorphic shift fork head (18), and laterally zygomorphic shift fork head (18) correspondence is arranged in the annular allocating slot (16) of clutch (6) central axis.