CN2605969Y

CN2605969Y - Multifunctional pneumatic rotary hammer

Info

Publication number: CN2605969Y
Application number: CN 03203101
Authority: CN
Inventors: 吕志辉; 徐忠鑫; 姜肖军
Original assignee: Zhejiang Wuyi Hengyou Electromechanical Co ltd
Current assignee: Zhejiang Wuyi Hengyou Electromechanical Co ltd
Priority date: 2003-01-29
Filing date: 2003-01-29
Publication date: 2004-03-10
Anticipated expiration: 2013-01-29

Abstract

The utility model belongs to the electric tool field, in particular to a multifunctional pneumatic rotary hammer having three functions of hammer, hammer drill, and drill. To aim at eliminating defects of poor reliability, bad positioning of chiseling tool, absence of overload protection for motor during use of the prior electric rotary hammer, the utility model provides the multifunctional pneumatic rotary hammer which has high reliability, correct positioning of chiseling tool, overload protection for motor, compact structure and easy operation. The utility model comprises a motor, an auxiliary hammer, a rammer, a piston, a cylinder and a gear reducer, wherein the gear reducer comprises a gear, a spring, a crank shaft, a shore, a bearing cap, a retainer ring, a gear housing, a gear core, a gear shaft, a clutch, a switching handle, a locking plate, a knob, and a shift fork component. The key point is that: the gear core and the clutch are orderly arranged on the gear shaft, the knob is arranged on the shift fork component, a switching spring is arranged on the shore, a friction ball is arranged in the middle of the shore, and the tail of the switching handle is connected with the shore.

Description

The Pneumatic rotary multifunctional electric hammer

Technical field

The utility model belongs to field of power tools, particularly a kind of Pneumatic rotary multifunctional electric hammer that has hammer, hammer drill and bore three kinds of functions.

Background technology

Existing electric hammer has wide range of applications, and in use, owing to structural reason, it is many, fragile to exist the Oscillating lever bearing fault of carrying out the function switching; When electric hammer carries out chiso-mallet, the circumferential rotation displacement of cutter tool meeting, polarization is poor, brings difficulty for the work of flat chisel shape instrument; When electric hammer is worked, there is not overload protection, the weak point of fragile electric hammer motor when overload.

Summary of the invention

In use existing above-mentioned to carry out the Oscillating lever bearing fault that function switches many, fragile at existing electric hammer for the utility model; When electric hammer carries out chiso-mallet, the circumferential rotation displacement of cutter tool meeting, polarization is poor; When electric hammer is worked, there is not the weak point of overload protection, a kind of electric hammer dependability height is provided; When electric hammer carried out chiso-mallet, chiso-mallet did not rotate, and can guarantee accurate positioning; Have the motor overload defencive function, prevent from that motor from scratching because of overload to ruin; One is formed in transmission, switch piece, compact conformation, easy to operate Pneumatic rotary multifunctional electric hammer.

The technical solution adopted in the utility model is finished in the following way: a kind of Pneumatic rotary multifunctional electric hammer, it comprises motor, secondary hammer, percussion hammer, piston, cylinder and gear reduction box.Wherein, gear reduction box comprises gear A, steel ball A, spring, oiliness bearing, bent axle, fore-set, bearing cap, back-up ring, gear box casing, core wheel, gear shaft, clutch, switching handle, locking plate, locking plate, knob, gear B, pull-fork assembly, gear shaft is contained on the gear box casing by bearing, core wheel and clutch are contained on the gear shaft successively, and gear A matches with core wheel by steel ball A and spring; Locking plate matches with clutch; Pull-fork assembly and clutch join, and knob is located on the pull-fork assembly; Fore-set is contained on the gear box casing, is provided with the switching spring on fore-set, is provided with steel ball B at the middle part of fore-set, and bent axle and gear B are sleeved on the fore-set by bearing, bearing cap, back-up ring, locking plate, and the afterbody and the fore-set that switch handle join.

Operation principle of the present utility model is: motor slows down to increase through gear reduction box and turns round, by the gear A driven rotary, driving piston by crankshaft connecting rod system moves back and forth, cause air pressure change in the air chamber, percussion hammer constantly impacts the pair hammer, pair hammers the bump drill bit into shape or cutter carries out work thereby drive, and by knob and action realization hammer, hammer drill, three kinds of function conversion of brill of switching handle.

Course of work when the utility model is in the different operating state is:

1, hammer drill duty: handle is switched in adjusting, knob is in the hammer drill position.Fore-set moves down under the spring pressure effect switching, and steel ball B is subjected to the fore-set extruding to enter crankshaft hole in the gear B groove gear B and bent axle to be locked into one in the moving rotation down of motor output shaft cingulum, thereby bent axle drivening rod mechanism realizes the hammer function.Gear B driven gear A rotation because knob is in the hammer drill position, moves on the clutch, and with the core wheel engagement, the driven gear axle rotates together, rotates through the moving drill bit of umbrella cingulum, thereby realizes boring function.

2, driller makes state: regulate the switching handle and be in the brill position, knob is in the hammer drill position.Switching handle will move on the fore-set, and fore-set disappears to the steel ball extruding force, and steel ball embeds the fore-set axle journal, breaks away from engagement with the gear B groove bent axle is not rotated.And gear B under the effect of motor output shaft tooth still driven gear A rotate, and knob still is in the hammer drill position, clutch, core wheel duty are identical with the hammer drill duty, thereby realize the brill function.

3, chiso-mallet duty: regulate the switching handle and be in the hammer drill position, knob is in the chiso-mallet position.Be in the hammer drill position owing to switch handle, fore-set, steel ball, bent axle are in the hammer drill duty, drivening rod, pistons work.And knob is in the chiso-mallet position, and shift fork drives clutch and core wheel breaks away from engagement, and clutch end face tooth and locking plate engagement maintain static gear shaft simultaneously, and chiso-mallet can not rotate when having guaranteed chiso-mallet, and at this moment, gear A is idling conditions.

4, overload protection.Implementing hammer drill or boring when drill bit occurring in the function course and being stuck; according to the driving-chain principle; gear shaft (comprising core wheel) can not rotate; and motor still rotates in driven gear B, gear A; gear A and core wheel (steel ball A) torsion is greater than acting force of the spring; gear A and core wheel relative motion make gear A in the idle running of core wheel place, thus protection motor nonoverload.

The utility model is compared with existing electric hammer, has the dependability height; When electric hammer carried out chiso-mallet, chiso-mallet did not rotate, and can guarantee accurate positioning; Has the motor overload defencive function; Transmission, switch piece compact conformation, easy to operate characteristics.

Description of drawings

Fig. 1 is the structural representation of Pneumatic rotary multifunctional electric hammer.

Fig. 2 is the structural representation of gear reduction box.

Fig. 3 is the A-A cutaway view of Fig. 2.

Fig. 4 is the vertical view of Fig. 2.

Fig. 5 is the upward view of Fig. 2.

The specific embodiment

Contrast accompanying drawing below, the utility model is described in further detail by embodiment.

With reference to accompanying drawing 1 to accompanying drawing 5, a kind of Pneumatic rotary multifunctional electric hammer, it comprises motor (1), secondary hammer (2), percussion hammer (3), piston (4), cylinder (6) and gear reduction box (5).Gear reduction box (5) comprises gear A (7), steel ball A (8), spring (9), oiliness bearing (10), bent axle (12), fore-set (15), bearing cap (16), back-up ring (17), gear box casing (18), core wheel (19), gear shaft (20), clutch (21), switches handle (22), locking plate (23), locking plate (24), knob (26), gear B (27), pull-fork assembly (28).Wherein, gear shaft (20) is contained on the gear box casing (18) by bearing, and core wheel (19) and clutch (21) are contained on the gear shaft (20) successively, and gear A (7) matches with core wheel (19) by steel ball A (8) and spring (9); Locking plate (24) matches with clutch (21); Pull-fork assembly (28) joins with clutch (21), and knob (26) is located on the pull-fork assembly (28), is provided with split washer (25) between knob (26) and pull-fork assembly (28); Be provided with oily window lid (11) at the top of gear box casing (18); Fore-set (15) is contained on the gear box casing (18), on fore-set (15), be provided with and switch spring (13), be provided with steel ball B (14) at the middle part of fore-set (15), bent axle (12) and gear B (27) are sleeved on the fore-set (15) by bearing, bearing cap (16), back-up ring (17), locking plate (23), and the afterbody and the fore-set (15) that switch handle (22) join.

Claims

1, a kind of Pneumatic rotary multifunctional electric hammer, it comprises motor (1), secondary hammer (2), percussion hammer (3), piston (4), cylinder (6) and gear reduction box (5) is characterized in that gear reduction box (5) comprises gear A (7), steel ball A (8), spring (9), oiliness bearing (10), bent axle (12), fore-set (15), bearing cap (16), back-up ring (17), gear box casing (18), core wheel (19), gear shaft (20), clutch (21), switch handle (22), locking plate (23), locking plate (24), knob (26), gear B (27), pull-fork assembly (28); Wherein, gear shaft (20) is contained on the gear box casing (18) by bearing, and core wheel (19) and clutch (21) are contained on the gear shaft (20) successively, and gear A (7) matches with core wheel (19) by steel ball A (8) and spring (9); Locking plate (24) matches with clutch (21); Pull-fork assembly (28) joins with clutch (21), and knob (26) is located on the pull-fork assembly (28), is provided with split washer (25) between knob (26) and pull-fork assembly (28); Fore-set (15) is contained on the gear box casing (18), on fore-set (15), be provided with and switch spring (13), be provided with steel ball B (14) at the middle part of fore-set (15), bent axle (12) and gear B (27) are sleeved on the fore-set (15) by bearing, bearing cap (16), back-up ring (17), locking plate (23), and the afterbody and the fore-set (15) that switch handle (22) join.

2, Pneumatic rotary multifunctional electric hammer according to claim 1 is characterized in that being provided with oily window at the top of gear box casing (18) covers (11).