CN201143666Y

CN201143666Y - Percussive pick

Info

Publication number: CN201143666Y
Application number: CNU2007201868093U
Authority: CN
Inventors: 欧阳文生
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-26
Filing date: 2007-12-26
Publication date: 2008-11-05
Anticipated expiration: 2017-12-26

Abstract

The utility model discloses an impact pickaxe with a power plant, which relates to the technical field of a power tool. The lower part of the impact pickaxe body is sheathed with a pickaxe cylinder by a pin and a slotted hole; a damping spring is arranged between the pickaxe body and the pickaxe cylinder; the pickaxe hammer is arranged in the pickaxe cylinder; the hammer handle of the pickaxe hammer and the output axis of a decelerating mechanism are connected with a steel ball which is arranged in a keyway by the keyway; the space between the pickaxe hammer and the pickaxe cylinder is connected with an impact spring by a thrust bearing; the hammer head sleeve of the pickaxe hammer is provided with an impact sleeve which is fixed in the pickaxe cylinder; a raceway which leads the pickaxe hammer to carry out reciprocating motions is arranged between the impact sleeve and the hammer head of the pickaxe hammer; the steel ball is arranged in the raceway; and the top end of a pickaxe chisel penetrates through the impact sleeve and is arranged at the lower part of the pickaxe hammer. The utility model can reduce the recoil vibration of the impact pickaxe, prolongs the service life of machine elements, reduces the production cost and enhances the comfort of operations. The impact pickaxe is mainly applied to the crushing of concrete, geotechnical and asphalt and the tamping of railway ballast.

Description

Impacting pickaxe

Technical field

The utility model relates to the power tool technical field, and is especially a kind of by internal combustion engine or electric motor driven impacting pickaxe.

Background technology

A kind of known oil-engine driven impacting pickaxe is arranged at present, its primary structure principle is: the output shaft of internal combustion engine is connected with a gear reduction, gear reduction changes reciprocating motion by crankshaft connecting rod system into rotatablely moving, one end of connecting rod connects bent axle, the other end passes through piston pin, the impact piston that displacer drives in guide pin bushing is reciprocating, reciprocating impact piston hits the pick rod that is installed in the pick, make pick rod produce impact energy, but, because of internal combustion engine, reducing gear, crankshaft connecting rod system, displacer is rigidly connected, the recoil active force that impact piston produces back transmits by Compressed Gas, make complete machine produce strong recoil vibration, the vibration force that the operator holds machine is very big, and machine damages easily.In addition, displacer is in impact piston, and impact piston is the bringing onto load high-speed slide in guide pin bushing, so displacer, impact piston, guide pin bushing, crankshaft-link rod damage easily.

Summary of the invention

Impacting pickaxe provided by the utility model, its task are the recoil vibrations that reduces impacting pickaxe, improve the comfortableness of operation and prevent that parts from damaging, and reduces manufacturing cost.

In order to realize above-mentioned task, this impacting pickaxe is equipped with power set, the pick body, billy club and pick rod, power set link to each other with gear reduction, the bottom of pick body is set with the pick tube by pin and slotted eye, between pick body and pick tube, shock-absorbing spring is housed, billy club is contained in the pick tube, the hammer handle of billy club and the output shaft of reducing gear are connected with steel ball in being contained in this keyway by keyway, be connected with impact spring by thrust bearing between billy club and the pick tube, the tup of billy club is set with the impact cover that is fixed in the pick tube outward, in the tup external cylindrical surface of billy club and two positions of matching of inner cylinder face of impacting cover, one of them position is provided with mutual isolation, the raceway that is obliquely installed along circumference, and another position wherein is provided with the waveform raceway around circumference, in above-mentioned mutual isolation, in the raceway that is obliquely installed along circumference a steel ball is housed respectively, half of steel ball impacted in the cover, and second half is in billy club, and the top of pick rod is passed and impacted the below that is sleeved on billy club.

Above-mentioned reducing gear can be a planetary gear reducing mechanism that is made of centre wheel, planetary gear, internal gear and planet carrier, and planetary gear reducing mechanism adopts planet carrier output; Above-mentioned mutual isolation, the raceway that is obliquely installed along circumference is the arcwall face along the circumference inclination that processes in the inner cylinder face of described impact cover, described waveform raceway around circumference is located in the tup external cylindrical surface of described billy club, also can be opposite, it is above-mentioned mutual isolation, the raceway that is obliquely installed along circumference can be located in the tup external cylindrical surface of billy club, then is located in the inner cylinder face that impacts cover around the waveform raceway of circumference.

Owing to adopted technique scheme, the utility model compared with prior art has following beneficial effect:

1, because billy club mainly adopts the steel ball scrolling realization to move back and forth, thus this impacting pickaxe have simple in structure, between the part wearing and tearing little, it is little to generate heat, long service life, low cost of manufacture is keeped in repair easy.

2, be provided with shock-absorbing spring, can absorb billy club well and hit the vibrational energy that pick rod produced, prevent that reducing gear, power set from damaging because of the brute force vibration, improve the comfortableness of operation simultaneously, reduce labour intensity.

Description of drawings

Fig. 1 is the structural representation of billy club impact conditions among the utility model embodiment.

Fig. 2 is the structural representation that billy club is mentioned state among the utility model embodiment.

The specific embodiment

Below in conjunction with the accompanying drawing example, the utility model is described in further detail:

Illustrated in figures 1 and 2 is one is equipped with the impacting pickaxe of internal combustion engine 2, internal combustion engine 2 is equipped with by terminal pad 4 in the top of its pick body 9, arm-rest frame 1 is equipped with at the middle part, the power of internal combustion engine 2 is passed to centre wheel 5 by centrifugal clutch 3, the internal gear 7 of planetary gear reducing mechanism is fixed on the pick body 9, centre wheel 5 by with the engagement of planetary gear 6 and internal gear 7, with the output shaft output of power from planet carrier 8; The bottom of pick body 9 is set with pick tube 16 by pin 10 and slotted eye, between pick body 9 and pick tube 16, shock-absorbing spring 12 is housed, billy club 17 is housed in pick tube 16, the hammer handle of billy club 17 upwards is inserted in the output shaft of planet carrier 8, the inner surface of the output shaft of planet carrier 8 is provided with the axial setting in four roads, the bottom surface is the keyway of cylindricality, be provided with also at the hammer handle outer surface of billy club 17 accordingly that four roads axially are provided with, the bottom surface is the keyway of cylindricality, between each of the output shaft of described planet carrier 8 and described hammer handle is to keyway, a steel ball 11 is housed respectively, be connected with impact spring 13 by thrust bearing 14 between billy club 17 and the pick tube 16, the tup of billy club 17 is set with the impact that is fixed in the pick tube 16 by screw thread outward and overlaps 18, the two adopts matched in clearance, in the inner cylinder face of described impact cover 18, along circumferencial direction, cutting out two with ball cutter isolates mutually, the arcwall face that is obliquely installed along circumference is as raceway, the tup of billy club 17 is a cylinder, in cylinder, be provided with the passage that is communicated with bottom surface and end face, in the face of cylinder of the tup of billy club 17, along circumferencial direction, process a waveform raceway with same ball cutter around circumference, raceway divides rising raceway and decline raceway, the rising raceway is short, the decline raceway is long, always have two rising raceways and two decline raceways, in described mutual isolation, in the raceway that is obliquely installed along circumference a steel ball 15 is housed respectively, half of steel ball 15 impacted 18 li in cover, second half is 17 li of billy clubs, and the top of pick rod 19 is passed and impacted the below that cover 18 is contained in billy club 17.

During the work of this internal combustion impacting pickaxe, the operator hands arm-rest frame 1, starting apparatus combustion engine 2, the throttle of controlling combustion engine 2, when the rotating speed of internal combustion engine 2 reaches certain value, centrifugal clutch 3 engages, import power into planetary gear reducing mechanism, behind planetary gear speed-reduction, obtain suitable rotating speed and enough big moment of torsion from the output shaft of planetary gear reducing mechanism, allow billy club 17 rotations, billy club 17 overcomes the active force of impact spring 13, roll along the inclined races of impacting cover 18 by steel ball 15 and to rise, this moment, the energy of internal combustion engine 2 outputs was stored up on impact spring 13, when steel ball 15 rises when being rolled into the decline raceway of

billy club

17,15 pairs of billy clubs 17 of steel ball lose supporting role, and fall after rise fast with billy club 17, billy club 17 hits pick rod 19 fast under the effect of impact spring 13, the energy that stores up on the impact spring 13 is passed on the pick rod 19, rotation along with billy club 17, billy club 17 repeats above-mentioned action again and rises, under dash, billy club 17 whenever turns around and hits pick rod 19 twice, goes round and begins again.In billy club 17 pumps process, when billy club 17 hits pick rod 19, pick rod 19 is given 17 1 recoil strength of billy club, the kinetic energy that this recoil strength produces passes to shock-absorbing spring 12 by billy club 17, impact spring 13, pick tube 16, and absorbed, thereby reduce the vibration of hitting 19 pairs of internal combustion engines 2 of pick rod, pick body 9, planetary gear reducing mechanism and arm-rest frame 1 by shock-absorbing spring 12.

The utility model also can adopt motor as power set in other embodiments.

Claims

1, a kind of power set (2) that are equipped with, reducing gear, pick body (9), the impacting pickaxe of billy club (17) and pick rod (19), it is characterized in that described pick body (9) is set with pick tube (16) by pin (10) and slotted eye, between described pick body (9) and described pick tube (16), shock-absorbing spring (12) is housed, described billy club (17) is contained in the described pick tube (16), the hammer handle of described billy club (17) and the output shaft of described reducing gear are connected with steel ball (11) in being contained in this keyway by keyway, be connected with impact spring (13) by thrust bearing (14) between described billy club (17) and the described pick tube (16), the tup of described billy club (17) is set with the impact cover (18) that is fixed in the described pick tube (16) outward, in two positions of matching of inner cylinder face of the tup external cylindrical surface of described billy club (17) and described impact cover (18), one of them position is provided with mutual isolation, the raceway that is obliquely installed along circumference, and another position wherein is provided with the waveform raceway around circumference, in described mutual isolation, in the raceway that is obliquely installed along circumference a steel ball (15) is housed respectively, half of steel ball (15) impacted cover (18) lining, second half is in billy club (17) lining, and the top of described pick rod (19) is contained in the described impact cover (18).

2, impacting pickaxe according to claim 1, it is characterized in that described reducing gear is a planetary gear reducing mechanism that is made of centre wheel (5), planetary gear (6), internal gear (7) and planet carrier (8), described mutual isolation, the raceway that is obliquely installed along circumference is the arcwall face along the circumference inclination that processes in the inner cylinder face of described impact cover (18), and described waveform raceway around circumference is located in the tup external cylindrical surface of described billy club (17).