TW201625386A - Pneumatic tool having impact group of double impact blocks - Google Patents

Abstract

Disclosed herein is a pneumatic tool having an impact group of double impact blocks, comprising a drive motor, the drive motor protruded outwardly with a drive shaft, the drive shaft formed with a drive section and an extension section along the protruding direction, an impact group connected with the drive motor, and formed with a rotation space inside the impact group, two impact blocks oppositely pivoted in the rotation space, each impact block having a forward striking portion and a reverse striking portion, the forward striking portion having a projecting length greater than the projecting length of the reverse striking portion, an anvil shaft penetrating the rotation space and formed with an anvil-striking portion corresponding to the forward striking portion and the reverse striking portion of each impact block, and the anvil shaft having an end face opposite to the drive motor provided with a circular hole for the extension section of the drive shaft to correspondingly penetrate therethrough.

Description

Pneumatic tool with double impact block impact group

The invention relates to impact pneumatic tools, and more particularly to a pneumatic tool having a double impact block impact set.

According to the conventional impact pneumatic tool, a pneumatic motor is used to drive an impact group to rotate, and the impact block inside the impact group is used to strike an anvil shaft, so that the anvil shaft generates a rotating power with an impact effect, so as to tighten or loosen the bolt. Or the purpose of the nut. However, the impact group of the conventional impact pneumatic tool is designed to have the difference between a single impact block and a double impact block.
As shown in Fig. 7, the impact group design with a single impact block is used, which causes the center of gravity to be uneven and sway when the impact group 91 rotates. Therefore, in order to reduce the shaking of the impact group 91 during rotation, this has only a single impact. The impact group 91 of the block 92 must be designed with an eccentric weight portion 93. However, in practice, the addition of the weight portion 93 not only increases the volume of the impact group, but also the setting of the eccentric position and weight must be continued during the development phase. It is calculated, modified and tested, and the design of the weight portion 93 of the impact pneumatic tools of different specifications or sizes is also different.
As shown in Fig. 8, for the impact group design with a double impact block, the impact group outer casing is composed of a frame 94, and an accommodation space 96 for accommodating the two impact blocks 95 is formed inside. However, in the impact group of such a structural design, the support walls at both ends of the frame 94 are only connected by the two ribs 941 located above and below, so the structural strength is not ideal. If the strength of the frame 94 is to be increased, the rib 941 must be added. The thickness, but this will cause the accommodation space 96 to be reduced, and the shock block 95 can be reduced by relatively accommodating the impact block 95 having a smaller size. If the external dimension of the frame 94 is directly expanded to increase the structural strength, the impact group is greatly increased. The volume.
As shown in FIG. 9, in order to adopt another impact group design with double impact blocks, the impact group 97 is internally provided with two impact blocks 98, which are arranged adjacent to each other before and after and opposite to each other. In the impact group 97, the two impact blocks 98 are respectively provided with a special opening 981 in the shape of a maple leaf at a central position. However, the impact block 98 of this type forms a sharp corner inside the opening 981, so that the anvil shaft is not only easy to be formed. 99 is worn and difficult to machine, and often does not meet the required precision requirements.
Furthermore, all of the above-mentioned conventional impact group designs are actually used, and since there is no support structure provided on the anvil shaft, there is still a problem that the anvil shaft is easily shaken and deflected when the impact block is hit, and both of them may cause Its output performance is reduced. In general, in the operation of the lock screw, only a certain torque output must be maintained when the screw is locked forward, but when the screw is loosened in the reverse direction, a large torque output must be provided to smoothly loosen the long-term. Screws in a fixed state, however, all of the above-mentioned impact group designs have the same torque output provided by the impact block in both the forward and reverse rotations, so the torque output provided is the same when the screw is tightened or loosened. It does not provide a large torque when the screw is loosened in the reverse direction, and cannot meet the actual use requirements.
In view of this, how to solve the above problem is the primary problem to be solved by the present invention. Therefore, the inventor of the present invention finally has the invention after continuous arduous thinking and trial work.

One of the objects of the present invention is to provide a pneumatic tool having a double impact block impact group, which has a large torque output when reversely rotated, and makes the work of loosening the screw more efficient.
Another object of the present invention is to provide a pneumatic tool having a double impact block impact group, which has the effect of effectively reducing the yaw deflection of the anvil shaft during operation and ensuring the output performance.
The third object of the present invention is to provide a pneumatic tool having a double impact block impact group, which has the additional weight added to the eccentric portion, and can effectively maintain the stability of the impact group during rotation.
The fourth object of the present invention is to provide a pneumatic tool with a double impact block impact group, the impact group has the advantages of easy assembly and good structural strength, and the impact block is more easy to process, and can easily achieve the predetermined precision requirement. .
To achieve the foregoing objects, the present invention provides a pneumatic tool having a double impact block impact group, comprising:
a handle having a driving motor at one end thereof, the driving motor has a driving shaft protruding outwardly, the driving shaft is sequentially formed with a driving section along a protruding direction thereof, and an outer diameter smaller than the driving section and having a cylindrical shape Extended section
An impact group, the one end of which is connected to the driving shaft of the driving motor, the impact group includes a rotating sleeve, a transmission seat, two impact blocks, a clamping ring and an anvil shaft, and the rotating sleeve is internally formed with a The rotating space has an outer wall surface and an inner wall surface, and the rotating space is coaxially arranged with the rotating sleeve, and two oppositely disposed pivoting grooves are recessed on the inner wall surface, and the rotating sleeve is provided at one end An opening corresponding to the swirling space, the other end of the rotating sleeve is formed with a rear side, and a through hole communicating with the rotating space is defined in a central portion of the rear side of the rotating sleeve, and the driving seat is opposite to the one end a driving hole is disposed in the through hole of the rotating sleeve, and a driving hole is formed in the center of the driving base. The driving section of the driving shaft is correspondingly engaged in the fitting hole, and the driving seat can be rotated, and the transmission seat is The other end of the recess is provided with two limiting slots arranged in opposite directions;
The two impact blocks are integrally connected with a pivot portion, a forward striking portion protruding from one side of the pivot portion, a reverse striking portion protruding from the other side of the pivot portion, and a limiting convex portion. And a convex elongation of the forward impact portion is greater than a convex elongation of the reverse impact portion, and the two impact blocks are respectively pivotally disposed at two pivoting slots of the rotary sleeve by the pivot portion thereof, and then respectively The limiting protrusions are oppositely engaged in the two limiting slots of the transmission seat, and the two impact blocks are respectively disposed opposite to the opposite hitting portion of the other impact block by the forward impact portion thereof, and the opposite portion The snap ring is correspondingly disposed in the opening of the rotating sleeve, and a through hole is formed in the center of the snap ring to communicate with the rotating space;
The anvil shaft has an actuating end and a driving end opposite to the actuating end. The anvil shaft is axially inserted through the perforation of the snap ring in the rotating space of the rotating sleeve, and is relatively abutted against The driving end has a circumferential surface and a bottom surface opposite to the transmission seat, and the circumferential surface of the transmission surface is convex at a position corresponding to the positive impact portion and the reverse impact portion of the second impact block. A second impact anvil is formed, and a central portion of the bottom surface of the actuation end is axially recessed, and an extension of the transmission shaft is correspondingly disposed in the circular hole, and the extension penetrates into the circular shape. The length of the hole is greater than half the depth of the circular hole;
When the driving shaft drives the transmission base to rotate, the two impact blocks are driven to rotate together with the rotating sleeve, and the forward impacting portions of the two impact blocks are simultaneously impacted to a corresponding one during the forward rotation. The first impact surface and the second impact surface are respectively defined on the anvil portion of the anvil shaft, and the first impact portion of the two impact blocks is opposite to the cross-sectional position of the corresponding anvil portion. The impact surface and the second impact surface are disposed in parallel with each other, and the reverse impact portion of the two impact blocks will simultaneously impinge on the anvil portion of the corresponding anvil shaft during a reverse rotation. A third impact surface and a fourth impact surface are respectively defined by the opposite impact portions of the impact block striking the corresponding cross-section of the anvil, and the third impact surface and the fourth impact surface are parallel to each other. Settings.
The above objects and advantages of the present invention will be readily understood from the following detailed description of the embodiments of the invention.

(customized part)
91, 97‧ ‧ impact group 92, 95, 98 ‧ ‧ impact block 93 ‧ ‧ weighting department 94 ‧ ‧ frame 941 ‧ ‧ rib 96 ‧ ‧ accommodating space 981 ‧ ‧ opening 99 ‧ ‧ anvil shaft (part of the invention)
11‧‧‧Handle 12‧‧‧Drive motor 13‧‧‧Drive shaft 14‧‧‧Drive segment 15‧‧‧Extension 21‧‧‧Shock group 31‧‧‧Rotating sleeve 32‧‧‧Swing space 33‧‧‧External wall 34‧‧‧ inner wall 35‧‧‧ pivoting groove 36‧‧‧ opening 37‧‧‧ rear side 38‧‧ ‧ through hole 41‧‧ ‧ transmission seat 42‧‧ ‧ set end 43 ‧‧‧Receiving end 44‧‧‧ fitting hole 45‧‧‧ Limiting groove 51‧‧‧ Impact block 52‧‧‧Pivot part 531‧‧‧ Forward hitting part 532‧‧‧Reverse hitting part 54‧‧‧Limited convex part 61‧‧‧Cartridge ring 62‧‧‧Perforated 63‧‧‧First support ring 64‧‧‧First support surface 71‧‧‧ Anvil shaft 72‧‧‧Activity end 721‧ ‧ ‧ Around the surface 722‧‧ ‧ bottom 73‧ ‧ transmission end 74 ‧ ‧ connection 75 ‧ ‧ anvil 76 ‧ ‧ round hole 81 ‧ ‧ outer casing 82 ‧ ‧ transmission hole 83 ‧ ‧Second support ring 84‧‧‧Second support surface P The second impact surface projecting length S1‧‧‧ P2‧‧‧ first impact surface S2‧‧‧ S4‧‧‧ fourth third strike face impact surface S3‧‧‧

Figure 1 is an exploded schematic view of the present invention.
Figure 2 is a schematic plan view of the impact block of the present invention.
Figure 3 is a perspective view of the assembled body of the present invention.
Figure 4 is a partial cross-sectional view of the assembled body of the present invention.
Fig. 5 is a schematic view showing the action of the impact group of the present invention in the forward rotation.
Fig. 6 is a schematic view showing the action of the impact group of the present invention in the reverse rotation.
Figure 7 is a schematic view showing the structure of a single impact block impact group.
Figure 8 is a schematic view showing the structure of a double impact block impact group.
Figure 9 is a schematic view showing another structure having a double impact block impact group.

As shown in FIGS. 1 to 4, the present invention provides a pneumatic tool having a double impact block impact group, which is mainly composed of a handle 11, an impact group 21 and a casing 81, wherein:
The handle 11 is provided with a driving motor 12 at one end thereof. The driving motor 12 has a driving shaft 13 protruding therefrom. The driving shaft 13 can be driven by the driving motor 12 to rotate in the forward and reverse directions, and the driving shaft 13 is along the driving shaft 13 A driving section 14 is formed in the protruding direction, and an extending section 15 having an outer diameter smaller than the driving section 14 and having a cylindrical shape is formed.
The impact group 21 is connected to the drive shaft 13 of the drive motor 12 at one end thereof. The impact group 21 includes a rotary sleeve 31, a transmission base 41, two impact blocks 51, a snap ring 61 and an anvil shaft. 71. The rotating sleeve 31 has a hollow cylindrical shape, and has a swirling space 32 formed therein, and has an outer wall surface 33 and an inner wall surface 34. The rotating space 32 is disposed coaxially with the rotating sleeve 22, and is disposed on the inner wall surface. The pivoting groove 35 is disposed on the opposite side of the inner wall surface 34, and the two pivoting grooves 35 are respectively recessed in the axial direction parallel to the rotating sleeve 31. Further, one end of the rotating sleeve 31 defines an opening 36 communicating with the rotating space 32, and the other end of the rotating sleeve 31 is formed with a rear side 37, and is opened at the center of the rear side 37 of the rotating sleeve 31. There is a through hole 38 communicating with the swirling space 32.
The transmission base 41 has a set of disposed ends 42 at one end and a receiving end 43 at the other end. The transmission base 41 is oppositely disposed with the assembly end 42 passing through the opening 36 of the rotary sleeve 31. A through hole 38 is formed in the through hole 38 of the rear side 37 of the rotating sleeve 31, and a fitting hole 44 extending through the assembled end 42 and the receiving end 43 is formed in the center of the driving base 41. The shape of the fitting hole 44 and the transmission The driving section 14 of the shaft 13 is corresponding to each other, and the driving section 14 of the driving shaft 13 is correspondingly fitted into the fitting hole 44 of the driving base 41 via the rear side 37 of the rotating sleeve 31, in this embodiment. The driving hole 44 and the driving portion 14 form a hexagonal shape corresponding to each other, so that the driving portion 14 of the driving shaft 13 can be correspondingly fitted into the fitting hole 44, and the driving base 41 can be rotated, and A limiting groove 45 is disposed on the outer circumference of the receiving end 43 of the transmission base 41 in a reverse direction.
The two impact blocks 51 are integrally connected with a pivot portion 52, a forward striking portion 531 protruding from the side of the pivot portion 52, and a convex portion 531 protruding from the other side of the pivot portion 52. a curved arc-shaped reverse striking portion 532 and a limiting convex portion 54 located at the end of the pivot portion 52 and the forward striking portion 531 and the reverse striking portion 532, and the positive striking portion The convex elongation P1 of the 531 is greater than the convex elongation P2 of the reverse striking portion 532. The two impact blocks 51 are respectively pivotally disposed at the pivotal portions 52 of the rotating sleeve 31 by the pivot portion 52, and then respectively The limiting protrusion 54 is oppositely engaged with the second limiting slot 45 of the transmission seat 41, and the two impact blocks 51 are respectively opposite to the impact portion 532 of the other impact block 51 by the positive impact portion 531. Relatively set. The outer diameter of each of the limiting protrusions 54 is smaller than the width of the two sides of the opposite limiting slot 45, so that each impact block 51 can pivot with its corresponding pivoting slot 35, and the limit is performed. The groove 45 can be used to limit the pivoting amplitude of each of the impact blocks 51.
The snap ring 61 is correspondingly disposed in the opening 36 of the rotating sleeve 31, and a through hole 62 is formed in the center of the snap ring 61 to communicate with the rotating space 32, and has a first hole in the through hole 62. A support ring 63 is formed around the first support ring 63 to form a circular first support surface 64, and the outer shape of the first support ring 63 corresponds to the shape of the through hole 62.
The anvil shaft 71 is a rod extending in the front and rear directions, and has an actuation end 72 and a transmission end 73 opposite to the actuation end 72, and is defined between the actuation end 72 and the transmission end 73. A connecting portion 74 is formed. The outer peripheral shape of the connecting portion 74 corresponds to the first supporting surface 64 of the first supporting ring 63. The anvil shaft 71 is axially inserted through the through hole 62 of the clamping ring 61. The rotating space 32 of the rotating sleeve 31 is disposed opposite to the receiving end 43 of the driving base 41. The operating end 72 has a circumferential surface 721 and abuts against the transmission base 41. a bottom surface 722 of the end portion 43 is formed at a position corresponding to the forward striking portion 531 and the reverse striking portion 532 of the second impact block 51, respectively, and a symmetrical so-called anvil portion 75 is formed. The bottom surface 722 of the operating end 72 is axially recessed with a circular hole 76. The extending portion 15 of the driving shaft 13 is correspondingly disposed in the circular hole 76, and the extending portion 15 is worn. The length of the circular hole 76 is greater than half of the depth of the circular hole 76, and when the bottom surface 722 of the operating end 72 of the anvil shaft 71 and the receiving end 43 of the transmission seat 41 abut each other, the clamping ring 61 The first support ring 63 is sleeved on the outer circumference of the connecting portion 74 of the anvil shaft 71.
The outer casing 81 is disposed on the outer circumference of the impact group 21 and is connected to the driving motor 12 . The outer side of the outer casing 81 defines a transmission hole 82 , and the transmission end 73 of the anvil shaft 71 passes through the transmission hole 82 . The second support ring 83 is formed in the drive hole 82 of the outer casing 81. The second support ring 83 is formed with a circular second support surface 84. The second support is formed. The surface 84 is the same size as the first support surface 64 of the first support ring 63. When the outer casing 18 is in contact with the drive motor 12, the second support ring 83 of the outer casing 81 can also be sleeved on the anvil. The connecting portion 74 of the shaft 71 is disposed on the outer circumference and adjacent to the first support ring 63.
Continuing to refer to FIGS. 4 and 5 , the pneumatic tool of the double impact block impact group of the present invention is actually used, and the two impact blocks 51 are respectively pivotally disposed on the inner wall surface 34 of the rotating sleeve 31 by the pivot portion 52 thereof. In the second pivoting groove 35, the limiting protrusions 54 of the two impact blocks 51 are respectively engaged in the two limiting slots 45 of the transmission seat 41, that is, the rotating sleeve 31 and the transmission seat 41. The two impact blocks 51 are mutually engaged by the two impact blocks 51. Therefore, when the drive shaft 13 drives the transmission base 41 to rotate in the forward and reverse directions, the two impact blocks 51 and the rotary sleeve 31 are also driven. And rotate in the opposite direction. As shown in FIG. 5, when the two impact blocks 51 are rotated in the forward direction (clockwise direction), they will pivot with their pivot portions 52 as axes, and the two impact blocks 51 are The forward striking portion 531 simultaneously hits the corresponding anvil shaft 71 anvil portion 75 in the rotational direction, and the forward striking portion 531 of the two impact blocks 51 strikes the cross of the corresponding anvil shaft 71 anvil portion 75. Each of the first impact surface S1 and the second impact surface S2 is parallel to each other (as shown by a dotted line in FIG. 5) ). On the other hand, as shown in FIG. 6, when the two impact blocks 51 are rotated in the reverse direction (counterclockwise direction), they will pivot with their pivot portions 52 as axes, and the two impact blocks 51 are pivoted. The reverse striking portion 532 simultaneously hits the corresponding anvil shaft 71 anvil portion 75 along the rotational direction, and the reverse striking portion 532 of the two impact blocks 51 strikes the corresponding anvil shaft 71 anvil portion. The cross-sectional position of the 75 defines a third impact surface S3 and a fourth impact surface S4, respectively, and the third impact surface S3 and the fourth impact surface S4 are arranged parallel to each other (such as a point chain in FIG. 6) Line shown). Here, it should be particularly noted that the cross section described above refers to a section in which the anvil shaft 71 is cut in a direction perpendicular to the axis line of the anvil shaft 71.
When the torsion force generated by the impact of the two impact blocks 51 is insufficient to push the anvil shaft 71 to rotate, the two impact blocks 51 are pivoted opposite to each other to make the forward impact portion 531 (or reverse stroke). The hitting portion 532) is disengaged from the anvil portion 75 corresponding to the anvil shaft 71, and then the two impact blocks 51 continue to rotate, and the forward striking portion 531 (or the reverse striking portion 532) will hit the phase again. The corresponding anvil shaft 71 strikes the anvil portion 75 to generate an impact force, and thereby the transmission end 73 of the anvil shaft 71 can generate a rotational power having an impact effect, and the positive impact of the two impact blocks 51 The convex elongation P1 of the portion 531 is greater than the convex elongation P2 of the reverse striking portion 532, whereby the forward striking portion 531 and the reverse striking portion 532 of the two impact blocks 51 can be forward and reverse. During the rotation process, there are different impact strokes respectively, that is, since the convex elongation P2 of the reverse impact portion 532 is short, the reverse impact is performed during the reverse rotation of the two impact blocks 51. unit 32 The impact distance of the impacting anvil shaft 71 on the anvil portion 75 will be longer than that in the forward rotation direction, and thereby providing a larger torque output in the reverse rotation, thereby making it possible to reversely loosen the screw. Producing a large torque output, the work of loosening the screw can be more efficient, and meet the actual use requirements.
Further, as shown in FIG. 4, the anvil shaft 71 of the present invention has a bottom surface 722 of the actuation end 72 opposite to the receiving end 43 of the transmission base 41, and the drive shaft 13 extends outwardly. An extension 15 of the circular hole 76 that penetrates the bottom surface 722 of the anvil shaft 71 of the anvil shaft 71, and the length of the extension 15 penetrating the circular hole 76 is greater than half of the depth of the circular hole 76, and thereby It can be ensured that when the anvil portion 75 on the actuating end 72 of the anvil shaft 71 is impacted, the actuating end 72 of the anvil shaft 71 can be restricted by the extending portion 15 without swaying and is matched with the anvil shaft 71. The connecting portion 74 is simultaneously sleeved in the first support ring 63 of the snap ring 61 and the second support ring 83 of the outer casing 81, and the flatness of the anvil shaft 71 during rotation is further ensured. Therefore, the phenomenon of swaying of the anvil shaft 71 during rotation can be effectively avoided, so that the forward striking portion 531 (or the reverse striking portion 532) of the two impact blocks 51 is in each hitting process. Can simultaneously To strike the anvil shaft 71 of anvil portion 75, while ensuring output performance.
Moreover, the pneumatic tool with the double impact block impact group provided by the present invention has a hollow cylindrical shape, so that the processing is not only easy, but also easy to assemble or disassemble the components, and does not need to be large. If the impact group volume is increased, the structural strength can be excellent. Further, since the present invention is provided with two symmetrical symmetric impact blocks 51 in the center of the rotating sleeve 31, it is not necessary to additionally The eccentric portion of the rotating sleeve 31 is provided with a weight portion, so that the entire impact group 21 has excellent stability during rotation and is not easy to shake, and the second impact block 52 and its pivot portion 52 and the forward striking portion are 531. The reverse striking portion 532 and the limiting convex portion 53 are a single member that are integrally connected, and therefore have better structural strength, and the impact block 51 is easy to process, and the effect of predetermined precision can be easily achieved.
The disclosure of the above embodiments is intended to be illustrative of the invention and is not intended to limit the invention.
In summary, it will be apparent to those skilled in the art that the present invention can achieve the foregoing objectives and is in compliance with the provisions of the Patent Law.

11‧‧‧Handle

12‧‧‧Drive motor

13‧‧‧Drive shaft

14‧‧‧Drive segment

15‧‧‧Extension

21‧‧‧ Shock Group

31‧‧‧Rotating sleeve

32‧‧‧Swing space

33‧‧‧ outer wall

34‧‧‧ inner wall

35‧‧‧ pivot slot

36‧‧‧ openings

37‧‧‧ Back side

38‧‧‧through hole

41‧‧‧Drive seat

42‧‧‧Set

43‧‧‧ receiving end

44‧‧‧ fitting holes

45‧‧‧ Limit slot

51‧‧‧ impact block

52‧‧‧ pivot

531‧‧‧ Forward Strike Department

532‧‧‧Reverse Strike Department

54‧‧‧Limited convex

61‧‧‧Knife ring

62‧‧‧Perforation

63‧‧‧First support ring

64‧‧‧First support surface

71‧‧‧ Anvil shaft

72‧‧‧ actuation

721‧‧‧ Around the circumference

722‧‧‧ bottom

73‧‧‧Drive end

74‧‧‧Connecting Department

75‧‧‧Anvil

76‧‧‧round hole

81‧‧‧Shell

82‧‧‧Drive hole

83‧‧‧second support ring

84‧‧‧second support surface

Claims (5)

[Item 1] A pneumatic tool having a double impact block impact set, comprising:
a handle having a driving motor at one end thereof, the driving motor has a driving shaft protruding outwardly, the driving shaft is sequentially formed with a driving section along a protruding direction thereof, and an outer diameter smaller than the driving section and having a cylindrical shape Extended section
An impact group, the one end of which is connected to the driving shaft of the driving motor, the impact group includes a rotating sleeve, a transmission seat, two impact blocks, a clamping ring and an anvil shaft, and the rotating sleeve is internally formed with a The rotating space has an outer wall surface and an inner wall surface, and the rotating space is coaxially arranged with the rotating sleeve, and two oppositely disposed pivoting grooves are recessed on the inner wall surface, and the rotating sleeve is provided at one end An opening corresponding to the swirling space, the other end of the rotating sleeve is formed with a rear side, and a through hole communicating with the rotating space is defined in a central portion of the rear side of the rotating sleeve, and the driving seat is opposite to the one end a driving hole is disposed in the through hole of the rotating sleeve, and a driving hole is formed in the center of the driving base. The driving section of the driving shaft is correspondingly engaged in the fitting hole, and the driving seat can be rotated, and the transmission seat is The other end of the recess is provided with two limiting slots arranged in opposite directions;
The two impact blocks are integrally connected with a pivot portion, a forward striking portion protruding from one side of the pivot portion, a reverse striking portion protruding from the other side of the pivot portion, and a limiting convex portion. And a convex elongation of the forward impact portion is greater than a convex elongation of the reverse impact portion, and the two impact blocks are respectively pivotally disposed at two pivoting slots of the rotary sleeve by the pivot portion thereof, and then respectively The limiting protrusions are oppositely engaged in the two limiting slots of the transmission seat, and the two impact blocks are respectively disposed opposite to the opposite hitting portion of the other impact block by the forward impact portion thereof, and the opposite portion The snap ring is correspondingly disposed in the opening of the rotating sleeve, and a through hole is formed in the center of the snap ring to communicate with the rotating space;
The anvil shaft has an actuating end and a driving end opposite to the actuating end. The anvil shaft is axially inserted through the perforation of the snap ring in the rotating space of the rotating sleeve, and is relatively abutted against The driving end has a circumferential surface and a bottom surface opposite to the transmission seat, and the circumferential surface of the transmission surface is convex at a position corresponding to the positive impact portion and the reverse impact portion of the second impact block. A second impact anvil is formed, and a central portion of the bottom surface of the actuation end is axially recessed, and an extension of the transmission shaft is correspondingly disposed in the circular hole, and the extension penetrates into the circular shape. The length of the hole is greater than half the depth of the circular hole;
When the driving shaft drives the transmission base to rotate, the two impact blocks are driven to rotate together with the rotating sleeve, and the forward impacting portions of the two impact blocks are simultaneously impacted to a corresponding one during the forward rotation. The first impact surface and the second impact surface are respectively defined on the anvil portion of the anvil shaft, and the first impact portion of the two impact blocks is opposite to the cross-sectional position of the corresponding anvil portion. The impact surface and the second impact surface are disposed in parallel with each other, and the reverse impact portion of the two impact blocks will simultaneously impinge on the anvil portion of the corresponding anvil shaft during a reverse rotation. A third impact surface and a fourth impact surface are respectively defined by the opposite impact portions of the impact block striking the corresponding cross-section of the anvil, and the third impact surface and the fourth impact surface are parallel to each other. Settings. [Item 2] A pneumatic tool having a double impact block impact group according to claim 1, wherein the two pivoting grooves are respectively recessed on two opposite sides of the inner wall surface of the rotary sleeve in an axial direction parallel to the rotary sleeve. on. [Item 3] A pneumatic tool having a double impact block impact group according to claim 1, wherein one end of the transmission base is formed with a set of ends, and the other end is externally formed with a receiving end, and the transmission seat is configured by the assembly end thereof. The opening of the rotating sleeve is oppositely disposed in the through hole of the rear side of the rotating sleeve, and the bottom surface of the anvil shaft is opposite to the receiving end of the driving base. [Item 4] A pneumatic tool having a double impact block impact group according to claim 1, wherein the perforation has a first support ring, and the first support ring is internally formed with a circular first support surface, and the first support ring A peripheral shape of a support ring corresponds to the shape of the through hole, and a connecting portion is defined between the actuating end and the driving end, and the connecting portion has a shape corresponding to the first supporting surface of the first supporting ring, and the anvil When the bottom surface of the operating end of the shaft abuts against the transmission seat, the first support ring of the clamping ring is sleeved on the connecting portion of the anvil shaft. [Item 5] A pneumatic tool having a double impact block impact group according to claim 4, further comprising a casing opposite to the outer periphery of the impact group and connected to the driving motor, the casing having a transmission at one end thereof a hole, and the driving end of the anvil shaft is exposed to the outer casing through the transmission hole, and has a second support ring in the transmission hole of the outer casing, and the second support ring is internally formed with a circular second support The second supporting surface is the same shape as the first supporting surface, and when the outer casing is in contact with the driving motor, the second supporting ring of the outer casing is sleeved on the connecting portion of the anvil shaft, and The first support ring is disposed adjacent to each other.