CN201350613Y - Striking set for pneumatic tool - Google Patents

Abstract

The utility model relates to a striking group for a pneumatic tool, comprising a sleeve, two hammers and a transmission shaft, wherein the sleeve has a barrel and a cover, the barrel has a containing space for containing the hammers, the cover is arranged on the barrel to close the containing space, and the transmission shaft has a spindle, the spindle passes through the cover of the sleeve and is inserted into the hammers; the striking group of the utility model designs the sleeve into two parts, the barrel and the cover, so that the sleeve not only has the characteristics of good structural strength and simple manufacturing process, but also can effectively reduce the volume of the pneumatic tool by reducing the rotation radius.

Description

Strike groups for air tools

technical field

The utility model relates to pneumatic tools, in particular to a strike group for pneumatic tools.

Background technique

As shown in FIG. 1 , a striking group 10 of an air tool mainly includes a hammer seat 11 , two hammers 12 , two detent pins 13 and a transmission shaft 14 . The hammer base 11 has an accommodating space 112, and has a through hole 114 and a ratchet hole 116 communicating with the accommodating space 112 on the front and rear sides respectively, wherein the ratchet hole 116 can be used for a ratchet shaft 152 of the driving device 15 engagement, so that the hammer seat 11 can be driven by the driving device 15 to rotate. Each hammer 12 is accommodated in the accommodating space 112 of the hammer seat 11, and has a locking hole 122 respectively, and each stop pin 13 is penetrated in the hammer seat 11, and is respectively connected with each hammer 12, so that the hammer The hammer base 11 can drive each hammer 12 to rotate through each detent pin 13; the transmission shaft 14 has a mandrel 142, and the mandrel 142 is passed through the locking hole 122 of each hammer 12 through the shaft hole 114 of the hammer base 11, And the transmission shaft 14 is provided with two bearing parts 144 on the mandrel 142, can be driven by each hammer 12 respectively and force the transmission shaft 14 to rotate, to achieve the purpose of locking or loosening parts such as bolts or nuts.

However, since the hammer base 11 is roughly in the shape of a rectangular frame, the hammer base 11 is prone to stress concentration at the four end corners under long-term use, resulting in structural damage. In addition, the hammer seat 11 requires a larger turning radius due to its shape, so that the air tool must provide a larger space for the hammer seat 11 to rotate, but such a design will increase the volume of the air tool. Furthermore, the hammer seat 11 must go through relatively complicated procedures to form the shape of the rectangular frame, which will increase the manufacturing cost.

Contents of the invention

In view of the above problems, the main purpose of the present utility model is to provide a strike group for pneumatic tools, which has good structural strength and is not easily damaged.

The second object of the present invention is to provide a striking group for an air tool, which can reduce the volume of the applied air tool or increase the output torque of the air tool.

Another object of the present invention is to provide a strike group for pneumatic tools, which is easy to manufacture and can reduce manufacturing cost.

In order to achieve the above purpose, the utility model provides a strike group for pneumatic tools, which is characterized in that it includes: a sleeve with a cylinder body and a cover, the cylinder body has a chassis, and the surrounding wall is composed of The peripheral edge of the chassis extends out, an accommodating space is defined by the chassis and the peripheral wall, and two first positioning grooves are arranged on the peripheral wall, and the cover is arranged on the peripheral wall of the cylinder body to close the The accommodating space, and the cover has a shaft hole and two positioning holes; two stop pins are respectively accommodated in the two positioning holes of the cover and the two first positioning grooves of the sleeve; The hammers are pivotably arranged in the accommodating space, and each of the hammers has a locking hole located in the center thereof, a second positioning groove for accommodating one of the locking pins, and a sliding groove for The other said detent pin is accommodated; a transmission shaft has a mandrel and two bearing parts arranged on said mandrel, and said mandrel is passed through the shaft hole of said cover and said hammers. The locking hole protrudes outside the sleeve.

In the above-mentioned technical solution of the utility model, the outer edge of the peripheral wall of the barrel body is circular.

In the above-mentioned technical solution of the utility model, the cover is detachably connected with the cylinder body.

In the above-mentioned technical solution of the present invention, the cover has a protrusion extending into the accommodating space of the barrel and abutting against the peripheral wall.

In the above-mentioned technical solution of the present invention, the inner edge of the peripheral wall of the barrel body has two planes and two arcuate surfaces, and the two first positioning grooves are respectively located on one of the planes.

In the above-mentioned technical solution of the utility model, the chassis of the cylinder body has a ratchet hole.

By adopting the above-mentioned technical scheme, the strike group of the present utility model provides a sleeve with a cylinder body and a cover, which allows the strike group of the present utility model to obtain good structural strength, and the sleeve itself is not easy to be damaged and is convenient to manufacture; in addition, the sleeve The required rotation radius of the cylinder is small, so that the volume of the pneumatic tool applied in the utility model can be effectively reduced.

Description of drawings

Fig. 1 is the three-dimensional exploded view of existing striking group;

Fig. 2 is a perspective view of a preferred embodiment of the utility model;

Fig. 3 is a three-dimensional exploded view of a preferred embodiment of the utility model;

Fig. 4 is a three-dimensional exploded view of a sleeve provided by a preferred embodiment of the present invention;

Fig. 5 is a side sectional view of the barrel body of the sleeve provided by a preferred embodiment of the present invention.

Detailed ways

In order to describe the structure, features and effects of the present utility model in detail, the following preferred embodiments are given below together with the accompanying drawings.

As shown in Figure 2 and Figure 3, the strike group 20 for pneumatic tools provided by the first preferred embodiment of the present invention includes a sleeve 30, two stop pins 40, 42, two hammers 50, 52 and a transmission shaft 60.

As shown in FIGS. 4 and 5 , the sleeve 30 has a body 32 and a cover 34 . The cylinder body 32 has a bottom plate 322 and a surrounding wall 324 , the surrounding wall 324 extends from the periphery of the bottom plate 322 , so that an accommodating space 36 can be defined between the bottom plate 322 and the surrounding wall 324 . There is a ratchet hole 33 on the chassis 322 for engaging a ratchet shaft (not shown) of a motor (not shown in the figure), the outer edge of the peripheral wall 324 is circular, and the inner edge has two opposite planes 326 With the two opposite arc surfaces 328 , the cylinder body 32 is recessed inwardly on each plane 326 of the peripheral wall 324 to form a semicircular first positioning groove 38 . The cover 34 has a protrusion 342, the protrusion 342 extends into the accommodating space 36 of the cylinder body 32 and sticks against the peripheral wall 324, so that the cover 34 and the cylinder body 32 are detachably tightly fitted together, and simultaneously the cylinder body 32 of the accommodating space 36 to be closed. The cover 34 has a shaft hole 344 communicating with the accommodating space 36 and two positioning holes 346 respectively communicating with the first positioning slots 38 .

A detent pin 40 passes through one of the positioning holes 346 of the cover 34 and is accommodated in one of the first positioning grooves 38 of the sleeve 30 , and the other detent pin 42 passes through the other positioning hole 346 of the cover 34 , It is accommodated in another first positioning slot 38 of the sleeve 30 .

As shown in FIG. 3 , each hammer 50 , 52 is accommodated in the accommodation space 36 of the cylinder body 32 , and has a locking hole 502 , 522 , a second positioning groove 504 , 524 , and a sliding groove 506 respectively. , 526. Each locking hole 502 , 522 is located at the center of each hammer 50 , 52 , and the directions of each locking hole 502 , 522 are just opposite. The second positioning grooves 504 , 524 are located on the top and bottom surfaces of the hammers 50 , 52 respectively, and can accommodate one of the stop pins 40 , 42 . Each sliding groove 506 , 526 is located on the bottom surface and the top surface of the hammer 50 , 52 respectively, and can accommodate another stop pin 42 , 40 . Therefore, the sleeve 30 can drive the hammers 50 , 52 to rotate and pivot in the accommodating space 36 of the cylinder body 32 through the detent pins 40 , 42 .

As shown in FIG. 3 , the transmission shaft 60 has a mandrel 62 and two bearing parts 64 provided on the mandrel 62 , and the central shaft 62 is passed through the shaft hole 344 of the cover 34 and the engagement of each hammer 50 , 52 The holes 502, 522 protrude from the outside of the sleeve 30, so that each hammer 50, 52 can force the transmission shaft 60 to rotate by pushing each bearing part 64, so as to tighten or loosen screws, bolts or nuts, etc. Component.

Comparing the structure of the utility model with the conventionally designed structure, it can be seen that the utility model adopts a circular design on the peripheral wall of the cylinder body 32, which can reduce the phenomenon of stress concentration, and the sleeve 30 is not easily damaged even after a long period of use. Moreover, the processing process of the sleeve 30 is also simpler than the rectangular hammer seat in the existing structure, which can reduce the manufacturing cost. In addition, because the cylinder body 32 is designed in a covered cylindrical shape, under the same weight, the volume of the sleeve 30 of the present invention is smaller than that of the rectangular hammer seat 11 of the conventional structure, making the sleeve 30 of the present invention smaller. The rotation radius required by the sleeve 30 when rotating is smaller than that required by the rectangular hammer seat of the existing structure, so that the pneumatic tool of the utility model does not need to provide too much space to accommodate the sleeve 30, and the pneumatic tool The volume can of course be effectively reduced. On the other hand, if the sleeve 30 of the utility model is compared with the existing rectangular frame hammer seat 11 in the same accommodation space, since the utility model adopts the cylindrical sleeve 30, its weight is lower than that of the conventional one. The hammer seat 11 is large, which can provide a larger output torque for the transmission shaft 60 .

According to the creative thinking of the utility model, the structure of the utility model can have multiple changes. For example: the barrel body and the cover of the sleeve are not limited to be fixed by a tight fit, but can also be locked by screws or welded, which can also achieve the purpose of the utility model.

The constituent components disclosed in the above embodiments of the utility model are only for illustration and cannot be used to limit the scope of protection of the patent of the utility model. The substitution or change of other equivalent components should also be protected by the patent of the utility model covered by the scope.

Claims (6)

1, a kind ofly be used for air tool strike group, it is characterized in that comprising:

One sleeve, have a stack shell and a capping, described stack shell has a chassis, one perisporium is extended by described chassis periphery, one accommodation space is defined by described chassis and described perisporium, and 2 first locating slot be located at described perisporium, described capping is located at the perisporium of described stack shell and is sealed described accommodation space, and described capping has an axis hole and two locating holes;

Two stopper pins are located in respectively in 2 first locating slots of two locating holes of described capping and described sleeve;

Two hammers pivotally are located in the described accommodation space, and each described hammer has a clip hole respectively and is positioned at its central authorities, and one second a locating slot confession wherein described stopper pin is installed with, and a chute is installed with for another described stopper pin;

One power transmission shaft has the portion of hitting of holding that an axle and two is located at described axle, and described axle is arranged in the clip hole of the axis hole of described capping and described each hammer and convexedly stretches in outside the described sleeve.

2, as claimed in claim 1ly be used for air tool strike group, it is characterized in that: the perisporium outer rim of described stack shell is for circular.

3, as claimed in claim 1ly be used for air tool strike group, it is characterized in that: described capping is for removably being connected with described stack shell.

4, as claimed in claim 1ly be used for air tool strike group, it is characterized in that: described capping has accommodation space and the subsides that a projection stretches into described stack shell and is butted on described perisporium.

5, as claimed in claim 1ly be used for air tool strike group, it is characterized in that: the perisporium inner edge of described stack shell has two planes and two cambered surfaces, and described 2 first locating slots lay respectively at a described plane.

6, as claimed in claim 1ly be used for air tool strike group, it is characterized in that: the chassis of described stack shell has a ratchet hole.

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