CN103381589B - Multifunctional percussion drill - Google Patents

Abstract

The invention discloses a multifunctional percussion drill, which comprises a gear mechanism, a rotating shaft, a torque adjusting mechanism, a percussion output mechanism and a function switching mechanism, wherein the percussion output mechanism is not in rigid contact during percussion output, and the friction force between a movable percussion disk and a roller is small due to the rolling characteristic of the roller, so that the noise generated during percussion is small, the power is saved, the percussion drill is not easy to wear, and is relatively durable and long in service life; the torque adjusting mechanism adopts a plurality of torque springs and spiral tooth blocks to compress the compressing mechanism of the percussion drill, so that the pressure is uniformly dispersed in a circumference manner, the torque adjusting mechanism is more labor-saving in torque adjustment, simple in structure and low in production cost; the torsion positioning mechanism has the advantages of simple structure and low production cost, and after the torsion positioning mechanism is positioned, the jacking part of the jacking pin is not easy to loosen from the gear hole, so the torsion positioning mechanism has better positioning stability.

Description

multifunctional impact drill

technical field

The invention relates to the technical field of percussion drills, in particular to a multifunctional percussion drill.

Background technique

At present, the multi-functional impact drill mainly includes a power device (such as a motor), a rotating shaft, and a drill chuck. The front end of the drill chuck can be equipped with different drilling tools (such as: center drills, drill bits, reamers, taps, etc.) , the rear end of the drill chuck is connected to the front end of the rotating shaft, and the rear end of the rotating shaft is connected to the power unit through a gear mechanism. Output mechanism, function conversion mechanism, torque adjustment mechanism can adjust the output torque of the rotating shaft according to needs, the impact output mechanism can drive the rotating shaft to output in impact mode, and the function conversion mechanism can switch the rotating shaft between electric drill mode and impact mode as required . When in use, the power device drives the rotating shaft to rotate through the gear mechanism, and the rotating shaft drives the drill chuck to rotate, so that the drill chuck can perform electric drilling or impact operation.

Such as the Chinese patent application number is 200810062909.4 invention patent, discloses a kind of multifunctional percussion drill.

The impact output mechanism of this multifunctional impact drill includes a static impact disc and a dynamic impact disc. The disk is sleeved and fixed on the rotating shaft of the impact drill, and the static impact disk is only sleeved on the rotation shaft of the impact drill, and the static impact disk is connected to the function conversion mechanism of the impact drill through transmission. When the impact drill needs electric drilling operation, the static impact plate is separated from the dynamic impact plate, and the gear mechanism of the impact drill drives the rotating shaft to rotate without impact; when the impact drill needs impact work, the function conversion mechanism of the impact drill drives the static impact plate to press down , so that the rear end face of the static impact disc is in contact with the front end face of the dynamic impact disc. Since the dynamic impact disc rotates with the rotation shaft and the height difference of the wave-shaped tooth disc, the vibration impact is generated while the rotation shaft is rotating, and the impact is realized. output of the pattern. But this kind of impact output mechanism, when the impact output, the wavy toothed plate on the rear end surface of the static impact plate and the wave-shaped toothed plate on the front end surface of the dynamic impact plate are in hard contact, the friction force is large, the noise generated is large, and the impact will be difficult. It consumes a lot of power, is easy to wear, and is not durable.

In addition, the torque adjustment mechanism of this multifunctional impact drill adjusts the torque output by adjusting the compression degree of a single torsion sleeve to a single torsion spring. This kind of torque adjustment mechanism using a single torsion spring needs to apply a large pressure to adjust the torque, that is, it is more laborious to adjust the torque, and the components such as the torque sleeve and the torque rotation sleeve that cooperate with the single torsion spring need to be designed. Complicated and expensive to produce.

Contents of the invention

The object of the present invention is to provide a multi-functional impact drill for the deficiencies of the prior art. The impact output mechanism of the impact drill has small friction force, low noise, power saving and durability when impacting, and the torque adjustment mechanism is more efficient when adjusting the torque. Labor saving, simple structure and low production cost.

In order to achieve the above object, the present invention provides a multifunctional impact drill, including a gear mechanism, a rotating shaft, a torque adjustment mechanism, an impact output mechanism, and a function conversion mechanism. The rollers of the dynamic impact disk, the roller seat, and the roller fixing bracket, the dynamic impact disk is sleeved and fixed on the rotating shaft, and the several rollers are fixed on the roller seat through the roller fixing bracket The front end of the roller seat is sheathed on the rotating shaft, and the roller seat is in transmission connection with the function conversion mechanism;

The torque adjustment mechanism includes a pressure seat sleeved on the rotating shaft, and a pressing mechanism for adjusting the torque output is arranged inside the pressure seat. The torque adjustment mechanism also includes several torsion springs, and the several Several helical blocks and torque sleeves corresponding to the torsion spring; several slide grooves corresponding to the several helical blocks are opened on the outside of the pressure seat, and the several slide grooves are evenly spaced among the pressure On the outside of the seat, the two sides of the helical block are provided with slide rails matching the chute, so that the helical block can be slidably installed in the chute; the bottom of the chute is provided with a pressure hole, the rear part of the torsion spring is inserted into the pressure hole, and the rear end of the torsion spring is pressed against the pressing mechanism through the pressure hole; the helical block is provided with a groove, and the groove is A pressure block is provided, the front part of the torsion spring is inserted into the groove, and the front end of the torsion spring is against the pressure block; the inner wall of the torque sleeve is provided with internal threads, and the outer side of the helical block An external thread matching the internal thread is provided, and the torque sleeve is sleeved on the periphery of the several helical blocks through the threaded connection between the internal thread and the external thread, so that the torque sleeve pushes the Several helical blocks slide simultaneously;

The torque adjustment mechanism is also provided with a torque positioning mechanism, the torque positioning mechanism includes a shift cover, an annular fixed cover fixed on the front end of the pressure seat, the shift cover is fixed on the front end of the torque sleeve, The fixed cover is located in the torque sleeve, so that the torque sleeve can rotate around the fixed cover, and the gear cover is located in front of the fixed cover; the gear cover is provided with several gear holes, so The several gear holes are distributed at intervals in a circle, the fixed cover is provided with a top pin and a top pin spring, and the top pin is elastically installed on the fixed cover through the top pin spring, and the fixed cover is provided with a The ejector pin hole corresponding to the gear hole on the circumference, the front end of the ejector pin is provided with a jacking part for pushing into the gear hole, and the jacking part protrudes out of the fixed pin hole through the ejector pin hole. The front end of the cover, and the jacking part is in the shape of a hemisphere.

The rear end of the dynamic impact plate of the impact output mechanism is provided with a wave-shaped toothed plate matching the several rollers.

The front end of the roller seat of the impact output mechanism is provided with a roller groove matching the roller, and the rear end of the roller is placed in the roller groove; the roller fixing bracket is provided with a roller groove matching the roller. The roller is matched with the roller fixing hole, and the front end of the roller protrudes forward through the roller fixing hole; the two sides of the roller are provided with roller clamping columns, and the two sides of the roller fixing hole are facing The front protrusion has a raised part matching the roller clamp, and the roller clamps on both sides of the roller are snapped into the raised parts on both sides of the roller fixing hole; the roller seat is The bearing is sleeved on the rotating shaft.

The number of rollers of the impact output mechanism is 5, and the 5 rollers are evenly distributed on the roller fixing bracket in a circumferential manner; As for the clamping block, the roller fixing bracket is provided with a clamping hole corresponding to the clamping block.

There are 6 torsion springs in the torque adjustment mechanism, and there are 6 corresponding helical blocks.

The torque adjustment mechanism also includes a functional positioning piece, the functional positioning piece is sleeved on the rotating shaft, and the functional positioning piece is against the front end of the screw block, and the functional positioning piece is located on the pressure seat between the fixed cover.

A pressure roller and a pressure steel ball are arranged in the pressure hole of the pressure seat, and the rear end of the torsion spring passes through the pressure roller and the pressure steel ball in sequence to resist the pressing mechanism.

The fixed cover of the torque positioning mechanism is provided with mounting holes for the ejector pin and the ejector pin spring to be installed; the outer surface of the torque sleeve is provided with gear scales corresponding to the several gear holes.

The fixed cover is provided with a first screw hole for fixing, and the shift cover is provided with a second screw hole for fixing.

The multifunctional percussion drill also includes a directional protection mechanism, which includes a directional protection clip connected to the gear mechanism, two directional rollers, and a directional fixing sleeve; the center of the directional protection clip A rotating shaft fixing hole is opened, so that the directional protection clip is clamped and fixed on the rear end of the rotating shaft through the rotating shaft fixing hole; the directional fixing sleeve is clamped and fixed in the rear part of the pressure seat , the directional fixing sleeve is provided with a circular clip placement hole, the clip placement hole and the rear part of the pressure seat form a clip placement area, and the directional protection clip is rotatably placed on the clip In the placement area; the directional protection clip is a hollow cylinder, and the two sides of the directional protection clip are symmetrically provided with directional protrusions for positively driving the directional roller, and the directional protection The other two sides of the clip are symmetrically cut with a vertical plane for reversely clamping the directional rollers; one directional roller is placed on one side between the two directional protrusions, and the other directional roller is placed on the side between the two directional protrusions. On the other side between the two orientation protrusions.

The beneficial effects of the present invention are:

In the impact output mechanism of the present invention, when the impact is output, several rollers at the front end of the roller seat are in contact with the dynamic impact plate, and the vibration impact is generated by the mutual friction between the dynamic impact plate and the several rollers, that is, it is not in rigid contact, and Due to the rolling characteristics of the roller itself, the friction between the dynamic impact plate and several rollers is small, therefore, the noise generated during the impact is small, the power is saved, and it is not easy to wear, and it is relatively durable and has a long service life.

Compared with the existing torque adjustment mechanism, the torque adjustment mechanism of the present invention uses multiple torsion springs and helical blocks to press the pressing mechanism of the percussion drill, so that the pressure is evenly distributed around the circumference, so it saves effort when adjusting the torque , and the structure is simple and the production cost is low.

The torque positioning mechanism of the present invention is simple in structure and low in production cost. Moreover, the torque positioning mechanism of the present invention uses the push-in part of the ejector pin to push into the gear hole of the gear cover to realize positioning. The strength of the ejector pin can make the jacking part withdraw from the gear hole, that is, after positioning, the jacking part of the jack pin is not easy to get loose from the gear hole, so the positioning stability of the torque positioning mechanism of the present invention is better.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic cross-sectional view of the present invention.

Fig. 3 is an exploded schematic diagram of the impact output mechanism of the present invention.

Fig. 4 is a structural schematic view of the assembly of the roller, the roller seat and the roller fixing bracket of the impact output mechanism of the present invention.

Fig. 5 is a schematic structural view of the roller fixing bracket of the impact output mechanism of the present invention.

Fig. 6 is a schematic structural view of the roller seat of the impact output mechanism of the present invention.

Fig. 7 is a schematic partial cross-sectional view of the impact output mechanism of the present invention.

Fig. 8 is an exploded schematic view of the torque adjustment mechanism of the present invention.

FIG. 9 is a schematic structural view of the screw block of the torque adjustment mechanism of the present invention.

Fig. 10 is a structural schematic diagram of the torque adjustment mechanism of the present invention when the pressure seat, the torsion spring, the screw block and the functional positioning piece are assembled together.

FIG. 11 is an exploded schematic diagram of FIG. 10 .

Fig. 12 is a schematic partial cross-sectional view of the torque adjustment mechanism of the present invention.

Fig. 13 is an exploded schematic view of the torque positioning mechanism and the torque sleeve of the present invention.

FIG. 14 is a schematic structural view of the torque positioning mechanism installed in FIG. 10 .

FIG. 15 is an exploded schematic view of FIG. 14 .

Fig. 16 is a schematic partial cross-sectional view of the location of the torque positioning mechanism of the present invention.

Fig. 17 is a schematic structural view of the orientation protection mechanism and the pressure seat of the present invention.

FIG. 18 is an exploded schematic view of FIG. 17 .

Fig. 19 is an exploded schematic view of the present invention, a power device, and a drill chuck.

Reference signs:

1—rotating shaft, 2—gear mechanism, 3—function conversion mechanism, 4—torque adjustment mechanism, 41—pressure seat, 411—chute, 412—pressure hole, 42—torque spring, 43——Screw block, 431—Slide rail, 432—Groove, 433—Block, 434—External thread, 44—Torque sleeve, 441—Internal thread, 442—Gear scale, 45——Function positioning piece, 46——Pressure roller, 47——Pressure steel ball, 5——Impact output mechanism, 51——Moving impact plate, 511——Wave-shaped toothed plate, 52——Roller, 521— —Roller Clamp, 53—Roller Seat, 531—Roller Slot, 532—Clamp Block, 54—Roller Fixing Bracket, 541—Roller Fixing Hole, 542—Protrusion , 543——Clip hole, 55——Bearing, 7——Torque positioning mechanism, 72——Gear cover, 721——Gear hole, 722——Second screw hole, 73——Fixed cover, 731— —Ejector pin hole, 732—installation hole, 733—the first screw hole, 74——ejector pin, 741——rejection part, 75——rejection pin spring, 8——pressing mechanism, 9——direction protection Mechanism, 91——orientation protection clip, 911——rotating shaft fixing hole, 912——orientation protrusion, 913——vertical plane, 92——orientation roller, 93——orientation fixing sleeve, 931——card Part placement hole, 101---drill chuck, 102---power device.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Please refer to FIGS. 1-19 , the multifunctional impact drill of the present invention includes a gear mechanism 2, a rotating shaft 1, a torque adjustment mechanism 4, an impact output mechanism 5, and a function conversion mechanism 3. The gear mechanism 2 can be driven by a power device 102 such as a motor, The gear mechanism 2 drives the rotating shaft 1 to rotate, and the function conversion mechanism 3 can switch the rotating shaft 1 between the electric drill mode and the impact mode as required. When in use, the front end of the rotating shaft 1 can be connected to the drill chuck 101 .

As shown in FIGS. 3 to 7 , the impact output mechanism 5 of the present invention includes a dynamic impact plate 51 , several rollers 52 for resisting the dynamic impact plate 51 , a roller seat 53 , and a roller fixing bracket 54 . The dynamic impact disc 51 is sheathed and fixed on the rotating shaft 1 of the impact drill, so that when the rotating shaft 1 rotates, it can drive the dynamic impact disc 51 to rotate. Several rollers 52 are fixed on the front end of the roller seat 53 through the roller fixing bracket 54 , that is, the several rollers 52 at the front end of the roller seat 53 are in contact with the dynamic impact plate 51 when the impact is output. The roller seat 53 is sleeved on the rotating shaft 1 of the impact drill, and the roller seat 53 is in transmission connection with the function conversion mechanism 3 of the impact drill (the connection method belongs to the prior art, and will not be described in detail here). When the impact is output, the impact The function conversion mechanism 3 of the drill can drive the roller seat 53 to press forward, so that several rollers 52 at the front end of the roller seat 53 are in contact with the dynamic impact disc 51, and the friction between the dynamic impact disc 51 and some rollers 52 is produce vibration shock.

Preferably, the rear end of the dynamic impact plate 51 is provided with a wave-shaped toothed plate 511 matching with several rollers 52, and the shape of each tooth of the wave-shaped toothed plate 511 matches the shape of the rollers 52, so that several rollers When the column 52 is in contact with the wave-shaped toothed plate 511 of the dynamic impact plate 51, due to the rotation of the dynamic impact plate 51 with the rotation shaft 1 and the height difference between the wave-shaped tooth plate 511 and the roller 52, the movement of the dynamic impact plate 51 The wave-shaped toothed plate 511 can rub against several rollers 52 to generate vibration impact. That is, the principle of its vibratory impact is identical with the impact output mechanism 5 of the existing impact drill, but the present invention adopts several rollers 52 to replace the wave-shaped teeth at the front end of the static impact disc of the impact output mechanism of the existing impact drill. disc, and due to the rolling characteristics of the roller 52 itself, the friction between the wave-shaped toothed disc 511 of the dynamic impact disc 51 and several rollers 52 is relatively small, therefore, the noise generated during the impact is small, and the power is saved. It is not easy to wear and tear and is more durable. Of course, according to the above structure, several rollers can also be used to replace the wave-shaped toothed plate 511 at the rear end of the dynamic impact plate 51, and such equivalent changes should all belong to the protection scope of the present invention.

Preferably, the front end of the roller seat 53 is provided with a roller slot 531 matched with the roller 52, and the rear end of the roller 52 is placed in the roller slot 531; The front end of the roller 52 protrudes forward through the roller fixing hole 541; the two sides of the roller 52 are provided with roller clips 521, and the two sides of the roller fixing hole 541 protrude forward There are protrusions 542 matched with the roller clamping posts 521 , and the roller clamping posts 521 on both sides of the roller 52 are engaged with the protrusions 542 on both sides of the roller fixing hole 541 . The above structure can make the roller 52 be clamped and fixed better without affecting the friction when the roller 52 is in contact with the wave-shaped toothed plate 511 of the dynamic impact plate 51 .

Preferably, the number of rollers 52 is 5, and the 5 rollers 52 are evenly distributed on the roller fixing bracket 54 in a circumferential manner; the front end of the roller seat 53 is provided with 5 engagement blocks evenly distributed in a circumferential manner 532, the roller fixing bracket 54 is provided with a locking hole 543 corresponding to the locking block 532, wherein the locking hole 543 of the roller fixing bracket 54 is locked to the locking block 532 of the roller seat 53, so that the roller is fixed The bracket 54 is preferably fixed on the front end of the roller seat 53 . Wherein, the roller seat 53 is sheathed on the rotating shaft 1 of the impact drill through the bearing 55 . Of course, the above-mentioned dynamic impact plate 51 , roller fixing bracket 54 , bearing 55 and the like are all provided with holes for sheathing on the rotating shaft 1 .

The working principle of the present invention: when the impact drill needs to perform impact work, the function conversion mechanism 3 of the impact drill drives the roller seat 53 to press forward, so that the wave shape of several rollers 52 at the front end of the roller seat 53 and the dynamic impact disc 51 The toothed discs 511 are in contact with each other. Since the dynamic impact disc 51 rotates with the rotation shaft 1 and the height difference of the wave-shaped toothed disc 511, the wave-shaped toothed disc 511 of the dynamic impact disc 51 rubs against several rollers 52 to generate vibration. Impact, so that the rotating shaft 1 generates vibration and impact while rotating, and realizes the output of the impact mode. Of course, when the impact drill does not need impact work, the function conversion mechanism 3 of the impact drill will drive the roller seat 53 to separate from the dynamic impact plate 51, that is, several rollers 52 are separated from the wave-shaped toothed plate 511.

Therefore, when the impact is output, several rollers 52 of the present invention are not in rigid contact with the wavy toothed disc 511 of the dynamic impact disc 51, and due to the rolling characteristics of the rollers 52 themselves, the wavy toothed disc 511 of the dynamic impact disc 51 The frictional force between 511 and several rollers 52 is small, therefore, the noise generated during the impact is small, saves power, is not easy to wear, is relatively durable, and has a long service life.

As shown in Figures 8 to 12, the torque adjustment mechanism 4 of the present invention includes a pressure seat 41 sheathed on the rotating shaft 1 of the hammer drill, and a pressing mechanism 8 for adjusting the torque output of the hammer drill is arranged in the pressure seat 41, That is, by adjusting the compression degree of the compression mechanism 8, the torque output of the impact drill can be adjusted, which belongs to the prior art and will not be repeated here. The torque adjusting mechanism 4 of the present invention also includes several torsion springs 42 , several helical tooth blocks 43 corresponding to the several torsion springs 42 , and a torque sleeve 44 . The outside of the pressure seat 41 is provided with several slide grooves 411 corresponding to several spiral tooth blocks 43, and several slide grooves 411 are evenly spaced on the outside of the pressure seat 41, and the two sides of the spiral tooth block 43 are provided with slide grooves. 411 is matched with the slide rail 431, the helical tooth block 43 is clamped to the chute 411 through the slide rail 431, so that the helical tooth block 43 can be slidably installed in the chute 411, that is, the helical tooth block 43 can slide forward and backward along the chute 411 . The bottom of the chute 411 is provided with a pressure hole 412, the rear portion of the torsion spring 42 is inserted into the pressure hole 412, and the rear end of the torsion spring 42 passes through the pressure hole 412 against the pressing mechanism 8 of the impact drill; the helical tooth block 43 A groove 432 is defined, and a pressure block 433 is disposed in the groove 432 . The front portion of the torsion spring 42 is inserted into the groove 432 , and the front end of the torsion spring 42 is against the pressure block 433 . The inner wall of the torque sleeve 44 is provided with an internal thread 441, and the outer side of the screw block 43 is provided with an external thread 434 matching the internal thread 441, and the torque sleeve 44 is sleeved on several screw teeth through the threaded connection between the internal thread 441 and the external thread 434. The periphery of the block 43 makes the torque sleeve 44 push several helical tooth blocks 43 to slide simultaneously by rotating. It can be seen from the above structure that the torsion spring 42 is placed between the screw block 43 and the pressing mechanism 8 of the impact drill, so the screw block 43 can be pushed to slide by rotating the torque sleeve 44, and then compressed by the screw block 43 The torsion spring 42 compresses the hold-down mechanism 8 of the percussion drill to realize the torque output of the adjustment percussion drill.

Preferably, the number of torsion springs 42 of the torque adjustment mechanism 4 of the present invention is 6, and the number of helical tooth blocks 43 is also corresponding to 6, and the 6 torsion springs 42 are evenly spaced and distributed in a circle, so that the torsion springs 42 are pressed against the impact drill. When the mechanism is 8, the force of the pressing mechanism 8 of the hammer drill is more uniform, so that the torque output of the hammer drill is more accurate.

Preferably, the torque adjustment mechanism 4 of the present invention also includes a functional positioning piece 45, which is sheathed on the rotating shaft 1 of the impact drill, and the functional positioning piece 45 is against the front end of the helical tooth block 43 to limit the helical tooth block 43, so that the screw thread block 43 can not slip out of the chute 411.

Preferably, a pressure roller 46 and a pressure steel ball 47 are arranged in the pressure hole 412 of the pressure seat 41, and the rear end of the torsion spring 42 passes through the pressure roller 46 and the pressure steel ball 47 in turn to resist the pressing mechanism 8 of the impact drill, that is, The pressure roller 46 is located between the rear end of the torsion spring 42 and the pressure steel ball 47, so that the pressure at the rear end of the torsion spring 42 can pass through the pressure roller 46 and the pressure steel ball 47 successively to the pressing mechanism 8 of the impact drill. The stress of the pressing mechanism 8 of the hammer drill can be made more uniform. Wherein, the pressure roller 46 is cylindrical.

The working principle of the present invention: when the user needs to adjust the output torque of the hammer drill rotating shaft 1, the user can rotate the torque sleeve 44 forward or reverse to make the torque sleeve 44 push the screw block 43 to slide backward or forward , and then make the helical block 43 compress or loosen the torsion spring 42, so that the torsion spring 42 compresses or loosens the pressing mechanism 8 of the hammer drill, so as to realize the increase or decrease of the output torque of the hammer drill rotating shaft 1 correspondingly.

Therefore, compared with the existing torque adjustment mechanism, the torque adjustment mechanism 4 of the present invention adopts multiple (that is, several) torsion springs 42 and helical tooth blocks 43 to compress the pressing mechanism 8 of the percussion drill, so that the pressure is circular. Evenly dispersed, so it is less labor-saving when adjusting the torque, and the structure is simple and the production cost is low.

As shown in Figures 13 to 16, the torque adjustment mechanism 4 of the present invention is also provided with a torque positioning mechanism 7, the torque positioning mechanism 7 includes a gear cover 72, an annular fixed cover 73 fixed on the front end of the pressure seat 41, and the gear cover 72 is fixed on the front end of the torque sleeve 44, and the fixed cover 73 is located in the torque sleeve 44, so that the torque sleeve 44 can rotate around the fixed cover 73. Of course, the torque sleeve 44, the gear cover 72, and the fixed cover 73 are all sleeved on the impact drill. Rotate shaft 1, like this, fixed cover 73 is fixed, and shift cover 72 can rotate with torque sleeve 44. And the shift cover 72 is located in front of the fixed cover 73. Specifically, the rear end face of the shift cover 72 and the front end face of the fixed cover 73 are fitted to a certain extent, so that the push-in portion 741 of the ejector pin 74 can be pushed up. into the gear hole 721. The shift cover 72 is provided with a plurality of shift holes 721 , and the plurality of shift holes 721 are distributed at intervals around the circumference. Of course, one shift hole 721 corresponds to one function gear or one torque gear. The fixed cover 73 is provided with a top pin 74 and a top pin spring 75, and the top pin 74 is elastically installed on the fixed cover 73 through the top pin spring 75, so that the top pin 74 has certain flexibility. The fixed cover 73 is provided with a push pin hole 731 corresponding to the gear hole 721 on the circumference. It protrudes from the front end of the fixed cover 73, so that the jacking part 741 of the jack pin 74 can be pushed into the gear hole 721; The insertion part 741 generates a certain pressure, so that the ejector pin 74 is retracted to a certain extent, and then the ejection part 741 is withdrawn from the original gear hole 721, and when the gear cover 72 does not rotate, the ejector pin 74 is reset due to the restoring force of the spring. Stretch out, make the push-in part 741 push into the new gear hole 721, and realize repositioning.

Preferably, the fixed cover 73 is provided with a mounting hole 732 for the top pin 74 and the top pin spring 75 to be installed. , and the push-in portion 741 of the ejector pin 74 protrudes from the front end of the fixed cover 73 through the ejector pin hole 731 .

Preferably, the outer surface of the torque sleeve 44 is provided with gear scales 442 corresponding to the gear holes 721 , so that the user can adjust the desired output torque according to the gear scales 442 . Wherein, the fixed cover 73 is provided with a first screw hole 733, so that the fixed cover 73 is fixed to the pressure seat 41 by screws; front end. Certainly, the above-mentioned shift cover 72 , fixed cover 73 and the like are provided with holes for sheathing on the rotating shaft 1 .

The working principle of the present invention: when the user needs to adjust the output torque of the hammer drill rotating shaft 1, the user can rotate the torque sleeve 44 to drive the torque sleeve 44 to drive the shift cover 72 to rotate, so that the jacking part 741 of the ejector pin 74 can be rotated from the The original shift hole 721 exits until the user stops turning the torque sleeve 44 (that is, adjusts to the required output torque), and the shift cover 72 does not rotate. In the gear hole 721, repositioning is realized.

Therefore, the torque positioning mechanism 7 of the present invention is simple in structure, and the production cost is low. Moreover, the torque positioning mechanism 7 of the present invention uses the push-in portion 741 of the ejector pin 74 to push into the gear hole 721 of the gear cover 72 to realize positioning. Only when a certain force is applied when the torque sleeve 44 is turned, can the jacking portion 741 of the ejector pin 74 withdraw from the gear hole 721, that is, after the positioning is completed, the jacking portion 741 of the ejector pin 74 is not easy to loosen from the gear hole 721. Off, so the positioning stability of the torque positioning mechanism 7 of the present invention is better.

As shown in Fig. 17 and Fig. 18, the multifunctional percussion drill of the present invention also includes an orientation protection mechanism 9, and the orientation protection mechanism 9 includes an orientation protection clip 91 connected with the gear mechanism 2, two orientation rollers 92, an orientation fixing Sleeve 93; the center of the directional protection clip 91 is provided with a rotating shaft fixing hole 911, so that the directional protection clip 91 is clamped and fixed on the rear end of the rotating shaft 1 through the rotating shaft fixing hole 911. Therefore, the gear mechanism 2 is The protection clip 91 drives the rotating shaft 1 to rotate. Orientation fixing sleeve 93 is clamped and fixed in the rear portion of pressure seat 41, and orientation fixing sleeve 93 is provided with circular clip placement hole 931, and the rear portion of this clip placement hole 931 and pressure seat 41 forms a clip placement area. The protection clip 91 is rotatably placed in the clip placement area. Wherein, the directional protection clip 91 is a hollow cylinder, and both sides of the directional protection clip 91 are symmetrically provided with directional protrusions 912 for driving the directional roller 92 in the forward direction (such as clockwise), and the directional protection The other two sides of the clip 91 are symmetrically cut with a vertical plane 913 for clamping the orientation roller 92 in the opposite direction (such as counterclockwise); one orientation roller 92 is placed on one side between the two orientation projections 912 , another orientation roller 92 is placed on the other side between the two orientation protrusions 912 .

The working principle of the directional protection mechanism 9 of the present invention is: when the gear mechanism 2 drives the rotating shaft 1 to rotate in the forward direction through the directional protection clip 91, it belongs to the normal operation of the impact drill. At this time, the directional roller 92 will not block the directional protection clip 91, but the directional protrusion 912 of the directional protection clip 91 drives the directional roller 92 to rotate; Symmetrical cutting has a vertical plane 913, so according to the principle of eccentricity, when the directional roller 92 reversely rolls to the vertical plane 913, the cylindrical directional roller 92 will be stuck at the vertical plane 913, so that the directional protection clip 91 cannot Reverse rotation, that is, the rotation shaft 1 can no longer reverse rotation, the advantage of this is to prevent the gear mechanism 2 from being damaged due to the reverse rotation of the rotation shaft 1 (such as caused by human factors). Therefore, the orientation protection mechanism 9 of the present invention can make the rotating shaft 1 rotate smoothly in the forward direction, that is, work normally, and can also protect the gear mechanism 2 from being damaged due to the reverse rotation of the rotating shaft 1 .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand , to modify or equivalently replace the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims (10)

1. A multifunctional impact drill, comprising a gear mechanism, a rotating shaft, a torque adjustment mechanism, an impact output mechanism, and a function conversion mechanism, characterized in that: the impact output mechanism includes a dynamic impact plate, several for resisting the dynamic impact plate. The rollers of the impact plate, the roller seat, and the roller fixing bracket, the dynamic impact plate is sleeved and fixed on the rotating shaft, and the several rollers are fixed on the front end of the roller seat through the roller fixing bracket , the roller seat is sheathed on the rotating shaft, and the roller seat is in transmission connection with the function conversion mechanism; The torque adjustment mechanism includes a pressure seat sleeved on the rotating shaft, and a pressing mechanism for adjusting the torque output is arranged inside the pressure seat. The torque adjustment mechanism also includes several torsion springs, and the several Several helical blocks and torque sleeves corresponding to the torsion spring; several slide grooves corresponding to the several helical blocks are opened on the outside of the pressure seat, and the several slide grooves are evenly spaced among the pressure On the outside of the seat, the two sides of the helical block are provided with slide rails matching the chute, so that the helical block can be slidably installed in the chute; the bottom of the chute is provided with a pressure hole, the rear part of the torsion spring is inserted into the pressure hole, and the rear end of the torsion spring is pressed against the pressing mechanism through the pressure hole; the helical block is provided with a groove, and the groove is A pressure block is provided, the front part of the torsion spring is inserted into the groove, and the front end of the torsion spring is against the pressure block; the inner wall of the torque sleeve is provided with internal threads, and the outer side of the helical block An external thread matching the internal thread is provided, and the torque sleeve is sleeved on the periphery of the several helical blocks through the threaded connection between the internal thread and the external thread, so that the torque sleeve pushes the Several helical blocks slide simultaneously; The torque adjustment mechanism is also provided with a torque positioning mechanism, the torque positioning mechanism includes a shift cover, an annular fixed cover fixed on the front end of the pressure seat, the shift cover is fixed on the front end of the torque sleeve, The fixed cover is located in the torque sleeve, so that the torque sleeve can rotate around the fixed cover, and the gear cover is located in front of the fixed cover; the gear cover is provided with several gear holes, so The several gear holes are distributed at intervals in a circle, the fixed cover is provided with a top pin and a top pin spring, and the top pin is elastically installed on the fixed cover through the top pin spring, and the fixed cover is provided with a The ejector pin hole corresponding to the gear hole on the circumference, the front end of the ejector pin is provided with a jacking part for pushing into the gear hole, and the jacking part protrudes out of the fixed pin hole through the ejector pin hole. The front end of the cover, and the jacking part is in the shape of a hemisphere. 2. The multifunctional impact drill according to claim 1, characterized in that: the rear end of the dynamic impact plate of the impact output mechanism is provided with a wave-shaped toothed plate matching the plurality of rollers. 3. The multifunctional impact drill according to claim 1 or 2, characterized in that: the front end of the roller seat of the impact output mechanism is provided with a roller slot matching the roller, and the rear of the roller The end is placed in the roller groove; the roller fixing bracket is provided with a roller fixing hole matching the roller, and the front end of the roller protrudes forward through the roller fixing hole; the roller There are roller clamps on both sides of the roller fixing hole. The two sides of the roller fixing hole protrude forward and have protrusions matching the roller clamps. The roller clamps on both sides of the roller are clamped. The protrusions on both sides of the roller fixing hole; the roller seat is sleeved on the rotating shaft through a bearing. 4. The multifunctional impact drill according to claim 3, characterized in that: the number of rollers of the impact output mechanism is 5, and the 5 rollers are evenly distributed on the roller fixing bracket in a circumferential manner ; The front end of the roller seat is provided with five clamping blocks evenly distributed around the circumference, and the roller fixing bracket is provided with clamping holes corresponding to the clamping blocks. 5. The multifunctional impact drill according to claim 1, characterized in that there are six torsion springs in the torque adjustment mechanism, and there are six corresponding helical blocks. 6. The multifunctional impact drill according to claim 1, characterized in that: the torque adjustment mechanism further includes a functional positioning piece, the functional positioning piece is sleeved on the rotating shaft, and the functional positioning piece is against Hold the front end of the screw block, and the functional positioning piece is located between the pressure seat and the fixed cover. 7. The multifunctional percussion drill according to claim 5 or 6, characterized in that: a pressure roller and a pressure steel ball are arranged in the pressure hole of the pressure seat, and the rear end of the torsion spring passes through the pressure roller, The pressure steel ball is against the pressing mechanism. 8. The multifunctional impact drill according to claim 1, characterized in that: the fixed cover of the torque positioning mechanism is provided with a mounting hole for the ejector pin and the ejector pin spring to be installed; the surface of the outer side of the torque sleeve is arranged There are gear scales corresponding to the several gear holes. 9. The multifunctional impact drill according to claim 8, characterized in that: the fixing cover is provided with a first screw hole for fixing, and the shift cover is provided with a second screw hole for fixing. 10. The multifunctional percussion drill according to claim 1, characterized in that: it also includes an orientation protection mechanism, the orientation protection mechanism includes an orientation protection clamp connected with the gear mechanism, two orientation rollers, an orientation fixed sleeve; the center of the directional protection clamp is provided with a rotating shaft fixing hole, so that the directional protection clamp is clamped and fixed on the rear end of the rotating shaft through the rotating shaft fixing hole; the directional fixing sleeve Clipped and fixed in the rear part of the pressure seat, the directional fixing sleeve is provided with a circular clip placement hole, and the clip placement hole and the rear part of the pressure seat form a clip placement area, and the directional protection The clip is rotatably placed in the clip placement area; the directional protection clip is a hollow cylinder, and two sides of the directional protection clip are symmetrically arranged for positively driving the directional roller Orientation protrusions, and the other two sides of the orientation protection clip are symmetrically cut with a vertical plane for reversely clamping the orientation rollers; one of the orientation rollers is placed between the two orientation protrusions On one side between the two orientation protrusions, another orientation roller is placed on the other side between the two orientation protrusions.