TW201520006A - Power driving tool having unicorn type impact set - Google Patents

Abstract

The invention relates to a power driving tool having unicorn type impact set mainly comprising a handle grip, a housing, an impact set and a ratchet unit. One end of the handle grip is disposed with a driving motor. The housing covers one end of the handle grip where is disposed with the driving motor and is formed with a rotating space inside the housing. The impact set is correspondingly disposed in the rotating space. The impact set includes a hammer frame, a hammer pivotally disposed in the hammer frame and a striking anvil shaft plugged to the hammer. The ratchet unit is correspondingly disposed to the housing and connected to the striking anvil shaft. The invention drives the impact set to rotate with the driving motor to allow the impact set to utilize the impact force driving the striking anvil shaft for rotation, thereby activating the ratchet unit.

Description

Power driven tool with one-angle impact group

The invention relates to an automatic hand tool, in particular to a power driving tool having a one-corner impact group.

Generally, most of the mechanical or mechanical parts are fixed by bolts or nuts. The way to manually remove the bolts or nuts has been replaced by a pneumatic or electric powered power hand tool, as shown in Figure 9. The impact driver 60 inside the driving tool includes a base 61, a hammer 62 disposed inside the base 61, and an anvil shaft 63 passing through the through base 61 and the hammer 62. The hammer 62 is at the center. A maple-like opening 621 is formed inside, and two flat impact surfaces 622 are formed on the inner side of the opening 621. The impact driver 60 has the following problems in practical use:

1. In order to enable the hammer 62 to be matched with the positive and negative movements of the motor, the anvil shaft 63 can be positively and reversely rotated against the two impact surfaces 622, but since the general power driving tool has an adjustable direction ratchet tool, The function of generating positive and negative rotation can be adjusted by the ratchet tool itself. Therefore, the function of rotating the positive and negative directions of the hammer 62 is superfluous and increases the manufacturing cost.

2. Since both sides of the opening 622 of the hammer 62 are sharp corners, the structure of the hammer 62 is more susceptible to damage during repeated impact use, and The shape of the hammer 62 and the anvil shaft 63 is special and difficult to process, and will also result in an increase in processing cost.

3. The existing anvil shaft 63 has a long length, and will easily cause partial bending or flexing under the action of cyclic impact, and the anvil shaft 63 needs to be replaced and repaired at a high cost.

Based on the above reasons, the existing power drive tools are necessary for improvement.

In order to solve the shortcomings and limitations of the existing power-driven tool hammer and anvil shaft, resulting in high manufacturing cost and short service life, the main object of the present invention is to provide a power driving tool with a single-angle impact group, and an impact group thereof. It is a one-way operation, and at the same time simplifies the internal structure of the hammer and anvil shaft of the impact group, which makes the processing and manufacturing easier and the cost is reduced, and the operation is not easy to cause failure or damage, and is quite practical.

The present invention solves the prior art problem of a power driving tool having a one-angle impact group, comprising a handle, a casing, an impact group and a ratchet unit, wherein the handle is provided with a driving motor at one end a driving shaft is protruded from one end of the driving motor; the housing is disposed at one end of the driving motor and correspondingly wrapped on the outer side of the driving motor to form a rotation inside the housing a space in which the housing is different from the end connected to the handle, and a tool hole penetrating in the opposite direction and communicating to the rotating space; the impact group is disposed in the rotating space of the housing And including a hammer frame, a hammer and a hammer axis, the hammer frame is connected to the side by one side a drive shaft that is rotatable with the drive shaft, the hammer frame is formed with a swinging space, the hammer is clamped to one side of the swinging space at one end, and is swingably clamped to the other end The other side wall of the swinging space is protruded from the two end faces of the hammer frame, and a rotating opening is formed on the inner side of the hammer, and a hollow is formed in the inner peripheral surface of the rotating port. a groove, and protruding along the side of the notch to form a single-angle flange, the anvil shaft is penetrated by the rotary opening of the hammer and rotatably fixed to the inner side of the hammer frame, the anvil shaft has a hammering portion and an eccentric shaft portion at the opposite end, the anvil portion is convexly provided with an abutting edge, and the eccentric shaft portion is away from the hammer and protrudes toward the front with an eccentric shaft, when the hammer is oriented When the unidirectional rotation is actuated, the one-angled flange is detachably contacted with the abutting edge of the anvil shaft to drive the anvil shaft to rotate, and when the hammer is rotated in the opposite direction, Driving the anvil shaft to rotate; the ratchet unit is correspondingly disposed in the rotating space of the housing And located in front of the impact group, the ratchet unit is coupled to the eccentric shaft portion of the anvil shaft and is rotatable with the anvil shaft, a portion of the ratchet unit penetrating the tool hole of the housing, The ratchet unit is provided with an adjustment knob at one end of the tool hole and a replaceable tool head at the opposite end.

In the above-mentioned power driving tool with a one-corner impact group, the inner peripheral surface of the rotating port is a curved surface formed by two curved surfaces having different radial sizes, and the aforementioned missing groove is located at the junction of the two curved surfaces. .

The above-mentioned power driving tool having a one-corner impact group, wherein the abutting edge forms an acute-angled flange on one side and an arcuate surface on the opposite side.

The aforementioned power driven tool having a one-corner impact group, The anvil shaft is an integral shaft extending in the front and rear directions.

The above-mentioned power driving tool having a one-corner impact group, wherein the anvil shaft is detachable, and a coupling sleeve is further disposed between the anvil portion and the eccentric shaft portion, the anvil portion is The coupling sleeve is detachably coupled to the eccentric shaft portion.

The power driving tool having the one-corner impact group, wherein the anvil portion is provided with an opposite end of the abutting edge to form a first assembly surface, and the eccentric shaft portion is formed at an opposite end of the eccentric shaft to form a corresponding The second assembly surface of the first assembly surface is formed with an assembly groove at both ends, and the assembly surfaces of the first assembly surface are respectively coupled to the assembly surface of the anvil portion and the assembly surface of the eccentric shaft portion.

In the foregoing power driving tool having a one-corner impact group, the first assembly surface, the second assembly surface, and the assembly groove are polygonal.

The enhancements that can be obtained by the technical means of the present invention include:

1. The power driven tool with the one-corner impact group of the invention is designed by the one-corner impact group, so that the impact group only needs to move in a single direction, and the positive reversal of the tool head can be changed by the adjustment of the ratchet unit. In the handle, there is no need to specially set a button for adjusting the forward and reverse rotation of the motor, so that the overall structure can be simplified and the service life can be improved.

2. The rotary mouth of the hammer in the impact group of the present invention is concavely provided with a notch, and the inner peripheral surface of the rotary opening forms a convex single-angle flange by the notch, and the anvil axis also corresponds to The rotary port forms a special flange on one side of the flange portion and the other side has a circular arc surface. When the hammer is rotated, it can be clamped to the flange portion of the anvil shaft with a single-angle flange to make the hammer It can drive the anvil axis to move in a single direction.

3. The rotary mouth of the hammer of the present invention is a single groove, and only one side is subjected to force. In addition to being easy to process, the side structure of the hammer is also thick and strong, so that the life of the hammer can be improved.

4. The anvil shaft of the present invention is further a detachable multi-piece combination. The coupling sleeve can be used to disassemble the anvil shaft into two. When the front end or the rear end portion of the anvil shaft is flexed or deformed, respectively, Replace, do not need to replace the entire group to save the cost of replacement.

10‧‧‧Handle

11‧‧‧Drive motor

110‧‧‧Drive shaft

12‧‧‧ Press button

20‧‧‧shell

21‧‧‧Swing space

22‧‧‧Tool hole

30, 30A‧‧ impact group

31‧‧‧ hammer frame

311‧‧‧Connecting plate

312‧‧‧ fixed plate

313‧‧‧ fitting holes

314‧‧‧Swing space

315‧‧‧ Anvil shaft piercing

316‧‧‧Pivot hole

32‧‧‧ hammer

321‧‧‧ Rotating mouth

322‧‧‧ Missing slot

323‧‧‧Unicorn flange

324‧‧‧ pivot slot

325‧‧‧ activity slot

33‧‧‧ pivot

34, 34A‧‧‧ Anvil shaft

341, 341A‧‧‧ anvil

3411‧‧‧Affinity

3412‧‧‧Flange

3413‧‧‧Arc face

3414‧‧‧First assembly surface

342, 342A‧‧‧ eccentric shaft

3421‧‧‧Eccentric shaft

3422‧‧‧Second assembly surface

40‧‧‧ratchet unit

41‧‧‧Adjustment button

42‧‧‧Tool head

60‧‧‧ Impact Driver

61‧‧‧Base

62‧‧‧ hammer

621‧‧‧ openings

622‧‧‧ impact surface

63‧‧‧ Anvil shaft

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective partial cross-sectional view of a preferred embodiment of the present invention.

Figure 2 is an exploded view of the drive motor and impact pack of the preferred embodiment of the present invention.

Figure 3 is an exploded view of the impact set of the preferred embodiment of the present invention.

4 is a partial perspective partial perspective view of an anvil shaft in accordance with a preferred embodiment of the present invention.

Figure 5 is a cross-sectional view showing the forward direction of the impact group of the preferred embodiment of the present invention.

Figure 6 is a cross-sectional view showing the reverse of the impact group of the preferred embodiment of the present invention.

Figure 7 is a perspective partial cross-sectional view showing a preferred second embodiment of the present invention.

Figure 8 is an exploded view of a shock group of a preferred second embodiment of the present invention.

Figure 9 is an exploded view of a conventional impact driver.

In order to understand the technical features and practical effects of the present invention in detail, and in accordance with the contents of the specification, it is further illustrated by the following figures. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT As follows: The present invention is a power driven tool having a one-corner impact group. Referring to the first preferred embodiment of FIG. 1, a handle 10, a housing 20, and an impact are included. Group 30 and a ratchet unit 40.

As shown in FIG. 1 and FIG. 2, the handle 10 extends in the front-rear direction and has a front end. A drive motor 11 is disposed at a front end of the handle 10. A drive shaft is protruded from the front end of the drive motor 11. 110. The outer periphery of the drive shaft 110 is ring-shaped, and a push button 12 for driving the drive motor 11 is disposed on the outer periphery of the handle 10. Since the handle 10 is a conventional technology and is not the focus of the present invention. Therefore, it is not detailed.

As shown in FIG. 1 , the housing 20 is a hollow housing assembled by a plurality of thin shells, and the housing 20 is disposed at a front end of the handle 10 and covered by the driving motor 11 . On the outside, the interior of the housing 20 forms a swirling space 21, and the end of the housing 20 is different from the end connected to the handle 10, and has a through-and-down direction and communicates with the rotating space 21 Tool hole 22.

As shown in FIG. 2 and FIG. 3, the impact group 30 is rotatably disposed in the swirling space 21 of the housing 20, and the impact group 30 includes a hammer frame 31, a hammer 32, and two pivots. a rod 33 and an anvil shaft 34, the hammer frame 31 is disposed adjacent to the driving motor 11, the hammer frame 31 has a connecting plate 311 and is parallel to the connecting plate 31 and is fixed at one of the front and rear intervals. A matching hole 313 corresponding to the driving shaft 110 is defined in the center of the connecting plate 311. The fitting hole 313 is a ring-shaped perforation, and the hammer frame 31 corresponds to the fitting hole 313. Engaged in the drive shaft 110, and spaced between the connecting plate 311 and the fixing plate 312 The oscillating space 314 is formed by the oscillating space 314, and the oscillating space 312 is disposed in the center of the fixing plate 312. The anvil shaft hole 315 is formed in the center of the fixing plate 312, and is respectively connected to the connecting hole 313. The plate 31 and the fixing plate 312 are provided with two left and right opposite pivot holes 316.

As shown in FIG. 2 and FIG. 3, the hammer 32 is a block whose front and rear widths correspond to the swinging space 314, and the upper and lower ends of the hammer 32 protrude from the hammer frame 31, respectively. On the upper and lower sides, the hammer 32 defines a rotating opening 321 on the inner side of the center, and a notch 322 is recessed in the inner peripheral surface of the rotating opening 321 , and a single-angle convex is formed on the side of the missing slot 322 . The edge 323, wherein the inner peripheral surface of the rotating port 321 is formed by two curved surfaces with different radiuses, and the aforementioned missing groove 322 is located at the intersection of the two curved surfaces, and the hammer 32 is The right side surface is recessed to form a semicircular pivot groove 324, and the opposite side of the hammer 32 is provided with an elongated movable groove 325, and the hammer 32 is correspondingly inserted into the swinging space 314. The two pivots 33 are correspondingly inserted into the two pivot holes 316 of the hammer frame 31, and correspondingly corresponding to the pivot groove 324 of the hammer 32 and the movable slot 325, and the hammer 32 is pivoted. The slot 324 is a fulcrum that enables the hammer 32 to move up and down along the corresponding pivot 33 with the movable slot 325.

As shown in FIG. 3 and FIG. 4, the anvil axis 34 is correspondingly penetrated by the anvil shaft hole 315 and abuts against a side wall adjacent to the fitting hole 313. The anvil axis 34 is integrally formed in the front and rear directions. The extending shaft has a hitting anvil portion 341 and an eccentric shaft portion 342 at the opposite end. The anvil portion 341 is convexly provided with an abutting edge 3411, and the abutting edge 3411 is formed on one side to form an acute angle. The flange 3412 and the opposite side form a circular arc surface 3413, The anvil axis 34 is aligned with the abutment edge 3411 in the rotation port 321 , and the one side of the abutment edge 3411 forming the flange correspondingly abuts against the one-angle flange of the anvil 32 323, by which the eccentric shaft portion 342 is away from the hammer 32 and protrudes toward the front with an eccentric shaft 3421.

As shown in FIG. 1 , the ratchet unit 40 is disposed corresponding to the swirling space 21 of the housing 20 and located in front of the impact group 30 , and a portion of the ratchet unit 40 passes through the tool hole of the housing 20 . 22, the ratchet unit 40 is provided with an adjusting button 41 at one end of the tool hole 22, and a replaceable tool head 42 is disposed at the opposite end. The adjusting button 41 can adjust the positiveness of the tool head 42. In the reverse steering, the ratchet unit 40 is coupled to the eccentric shaft portion 342 of the anvil shaft 34, and the rotation of the eccentric shaft 3421 is used to drive the ratchet unit 40 to actuate the bolt or nut quickly and automatically. Since the ratchet unit 40 is of the prior art, the detailed operation and the manner of use are not described herein.

As shown in FIG. 1 and FIG. 5, the user can hold the handle 10 and press the push button 12 to drive the drive motor 11 to actuate the drive motor 11. The hammer frame 31 of the impact group 30 can be rotated, wherein the drive motor 11 is in a forward rotation state, and when the drive motor 11 is rotated forward, the hammer frame 31 will be rotated in the same rotation direction, and The hammer 32 is rotated together. When the hammer 32 is rotated to a specific angle, the hammer 32 will generate a yaw in the upper and lower directions, and the single-angle flange 323 is abutted against the anvil shaft 34. a flange 3412, which in turn drives the anvil shaft 34 to rotate simultaneously, and thereby generates a torsion force and drives the ratchet unit 40 to act as a tool of the ratchet unit 40 When the torque of the head 42 is greater than the torque generated by the impact group 30, the torque caused by the hammer 32 during the yaw is insufficient to push the anvil shaft 34, so that the hammer 32 is biased against the yaw. The middle slides out and will no longer push the anvil shaft 34, so that the hammer 32 of the impact group 30 can be prevented from continuously hitting the anvil shaft 34 to cause a locked state.

As shown in FIG. 1 and FIG. 6 , it is an operating state in which the driving motor 11 is reversed. Since the rotating port 321 of the hammer 32 is specially designed, the single-angle flange 323 is formed only on a single side, and The anvil portion 341 is formed on the opposite side of the flange 3412 to form the circular arc surface 3413. Therefore, when the driving motor 11 reversely drives the hammer 32 to act, the hammer 32 cannot abut against the anvil axis 34. The driving action is such that the ratchet unit 40 cannot be actuated by the impact group 30 when the driving motor 11 is reversed.

In this way, the impact group 30 of the present invention only needs to be moved in a single direction, and the adjustment knob 41 of the ratchet unit 40 can change the forward and reverse steering of the tool head 42, so that it is not required at the handle 10. In particular, a button for adjusting the forward and reverse rotation of the motor is provided, and the design of the handle 10 can be simplified, and the rotary port 321 of the hammer 32 is in a special shape of a single angle type, so that the hammer 32 is only unilaterally subjected to the action. In addition to the ease of processing and the low production cost, the side structure of the hammer 32 is also relatively strong and strong, so that the life of the hammer 32 can be improved.

As shown in FIG. 7 and FIG. 8 , the second preferred embodiment of the present invention is substantially the same as the first preferred embodiment. The difference is that the anvil axis 34A of the impact group 30A is detachable, wherein the impact is The anvil shaft 34A includes an anvil portion 341A and an eccentric shaft portion. 342A and a coupling sleeve 343, one end of the anvil portion 341A is provided with the abutting edge 3411, and a polygonal first assembly surface 3414 is formed at an opposite end of the abutting edge 3411. The eccentric shaft portion 342A The eccentric shaft 3421 is disposed at one end of the eccentric shaft 3421. The second assembly surface 3422 corresponding to the anvil portion 341A is formed at an opposite end of the eccentric shaft 3421. The coupling sleeve 343 is formed into a polygonal assembly groove at both ends. 3431, and the two assembly grooves 3431 are respectively coupled to the first assembly surface 3414 and the second assembly surface 3422, so that the anvil axis 34A is in a detachable state.

Thereby, when the anvil shaft 34A is locally deformed or bent due to use in the anvil portion 341A or the eccentric shaft portion 342A, the user will be able to replace it separately without replacing the entire anvil shaft 34A. It can reduce the cost of replacement.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any one of ordinary skill in the art can use the present invention without departing from the technical features of the present invention. Equivalent embodiments of the local changes or modifications made by the disclosed technology are still within the scope of the technical features of the present invention.

10‧‧‧Handle

11‧‧‧Drive motor

12‧‧‧ Press button

20‧‧‧shell

21‧‧‧Swing space

22‧‧‧Tool hole

30‧‧‧ Shock Group

40‧‧‧ratchet unit

41‧‧‧Adjustment button

42‧‧‧Tool head

Claims (7)

The utility model relates to a power driving tool with a single-angle impact group, comprising: a handle, which is provided with a driving motor at one end, a driving shaft is convexly arranged at one end of the driving motor; and a casing is disposed on the grip The handle is provided with one end of the driving motor, and correspondingly covers the outer side of the driving motor, and a rotating space is formed inside the housing, and the housing is different from the end connected to the handle. a tool hole penetrating in the opposite direction and communicating to the swirling space; an impact group disposed in the swirling space of the housing and including a hammer frame, a hammer and an anvil shaft The hammer frame is coupled to the drive shaft on one side and is rotatable with the drive shaft. The hammer frame is formed with a swinging space, and the hammer is clamped at one end to one side wall of the swing space, and The other end is swingably clamped to the other side wall of the swinging space, and the two ends of the hammer protrude from the end faces of the hammer frame respectively, and a rotating port is formed on the inner side of the hammer. The inner peripheral surface of the mouth is concavely provided with a missing groove, and the missing groove The side protrusion forms a one-angle flange, and the anvil shaft is penetrated and rotatably fixed to the inner side of the hammer frame by the rotary opening of the hammer, the anvil shaft has an anvil and an opposite end. An eccentric shaft portion, the anvil portion is convexly provided with an abutting edge, the eccentric shaft portion is away from the hammer and protrudes toward the front with an eccentric shaft, and when the hammer is rotated in a single direction, The one-angled flange is detachably contacting the abutting edge of the anvil shaft to drive the anvil shaft to rotate, and when the hammer is rotated in the opposite direction, the anvil shaft is not rotated; a ratchet unit corresponding to the swirling space of the housing and located in front of the impact group, the ratchet unit being connected to the anvil axis The spindle portion is rotatable with the anvil shaft, and a portion of the ratchet unit is threaded through the tool hole of the housing, and the ratchet unit is provided with an adjustment knob at an end of the tool hole, and is opposite to the end There is a replaceable tool head. The power driving tool having the one-corner impact group according to claim 1, wherein the inner peripheral surface of the rotating port is a curved surface formed by two curved surfaces having different radial sizes, and the aforementioned missing groove is located in two arcs. The face meets. A power driving tool having a one-corner impact group according to claim 2, wherein the abutting edge forms an acute-angled flange on one side and an arcuate surface on the opposite side. A power driving tool having a one-corner impact group according to claim 1, 2 or 3, wherein the anvil shaft is an integral shaft extending in the front and rear directions. The power driving tool according to claim 1, 2 or 3, wherein the anvil shaft is detachable, and a coupling sleeve is further disposed between the anvil portion and the eccentric shaft portion. a barrel that is detachably coupled to the eccentric shaft portion by the coupling sleeve. A power driving tool having a one-corner impact group according to claim 5, wherein the anvil portion is provided with an opposite end of the abutting edge to form a first assembly surface, and the eccentric shaft portion is opposite to the eccentric shaft Forming a second assembly surface corresponding to the first assembly surface, the coupling sleeve forming an assembly groove at each end, and respectively corresponding to the assembly surface of the anvil portion and the eccentric shaft by the two assembly grooves The assembly surface of the department. The power driving tool of claim 6, wherein the first assembly surface, the second assembly surface, and the assembly slot are polygonal.