TW201313405A - Cylinder flow diversion structure for pneumatic tool - Google Patents

Abstract

The invention provides a cylinder flow diversion structure for pneumatic tool. The cylinder is contained in a containing tank of the pneumatic tool and includes a circular cylinder wall and an inner cylinder chamber, wherein a rotor is contained inside the cylinder chamber, mainly characterized in that: the rotor is placed in an intermediate dividing point place of the cylinder chamber to divide the cylinder chamber into a first pneumatic driving space and a second pneumatic driving space, and two pneumatic driving spaces include an air intake section, a compression section, and a pressure relief section respectively; an air intake/discharge flow diversion control portion is disposed outside of the circular cylinder wall corresponding to a junction place between the first pneumatic driving space and the second pneumatic driving space; a first external channel and a second external channel separately arranged at an interval and communicated with the air intake/discharge flow diversion control portion at one end are disposed to the outside of the circular cylinder wall; and the circular cylinder wall is disposed with an first air intake hole communicated with the air intake section of the first pneumatic driving space and the air intake/discharge flow diversion control portion, a first air discharge hole communicated with the pressure relief section of the first pneumatic driving space and the first external channel, a second air intake hole communicated with the air intake section of the second pneumatic driving space and the second external channel, and a second air discharge hole communicated with the pressure relief section of the second pneumatic driving space and the air intake/discharge flow diversion control portion. Accordingly, when the air intake/discharge flow diversion control portion introduces airstream, the airstream can be diverted and guided via the two air intake holes, the two air discharge holes, and the two external channels to constitute a state of having two pneumatic driving spaces synchronously compressing and driving the rotor in a single cylinder chamber, so as to achieve advantages and practical progressiveness of further enhancing the driving torque of the pneumatic tool.

Description

Cylinder shunt structure of pneumatic tools

The invention relates to a pneumatic tool; in particular to an innovative design of a cylinder split structure of a pneumatic tool.

According to the design of the driving structure of the pneumatic tool, the air pressure is introduced into a cylinder to push a blade rotor to generate a rotating motion, and then a shaft is synchronously rotated to generate a predetermined function (such as a loose bolt).

As described above, the conventional blades are usually disposed in the cylinder in a biased state, and the space on the side where the distance between the blades and the cylinder is widened is used as a push for pressure introduction, compression, expansion, and pressure relief. Space, however, since the air pressure enters the pushing space, the pressure relief hole must be opened for pressure relief at less than half of the stroke position, so that the blade can smoothly rotate continuously, but the compression stroke of the air pressure is relatively affected. Limitation and difficulty in further improving the problem of torsion and bottleneck. The driving torque of the pneumatic tool depends mainly on the force of the air pressure to push the blade. However, the conventional structure description can be understood without increasing the volume of the cylinder space. The effective stroke of the air pressure to push the blade to generate the torque will be subject to the position of the pressure relief hole without the possibility of re-expansion and long-term increase. Therefore, if it continues to follow the conventional structure, it is difficult to further improve the driving torque of the pneumatic tool (including the rotation). And reversal), this undoubtedly makes the relevant industry face a technical bottleneck that is difficult to break through.

Therefore, in view of the problems existing in the above-mentioned conventional pneumatic tool structure, how to develop an innovative structure that can further enhance the driving torque and is more ideal and practical, and the relevant industry should further consider the goal and direction of breakthrough.

In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the inventor has finally obtained the practical invention.

The main object of the present invention is to provide a cylinder shunt structure for a pneumatic tool, and the problem to be solved is to develop a new pneumatic tool capable of further increasing the driving torque without increasing the volume of the cylinder space. The cylinder structure is considered as a target for breakthrough; the cylinder system is accommodated in a cavity provided by the pneumatic tool, the cylinder includes an annular cylinder wall and an inner cylinder chamber, wherein the cylinder chamber is provided for a rotor, and the rotor ring is provided with a number The blade is in contact with the annular cylinder wall; the technical feature of the problem solving of the present invention mainly comprises: the rotor is placed at an intermediate demarcation point position in the cylinder chamber, and the cylinder chamber is separated to form a first one. The air pressure driving space and the second air pressure driving space; wherein the first and second air pressure driving spaces respectively comprise an air inlet section, a compression section and a pressure relief section; the outer side of the annular cylinder wall corresponds to the intersection position of the first and second air pressure driving spaces An intake and exhaust split control unit is disposed at the outer side of the annular cylinder wall of the cylinder, and the first outer passage and the second outer passage are respectively disposed at intervals, and One end of the first and second external passages are connected to the intake and exhaust split control unit; the annular cylinder wall is provided with an intake section and an intake and exhaust split control unit that are connected to the first air pressure driving space by the first intake hole, and are provided a first exhaust hole communicates with the first pressure passage of the first air pressure driving space and the first outer passage, and a second air inlet hole communicates with the air inlet section and the second outer passage of the second air pressure driving space; The second venting port communicates with the pressure relief section of the second air pressure driving space and the intake and exhaust flow dividing control section; thereby, the innovative and unique design enables the present invention to be introduced into the airflow when the intake and exhaust flow dividing control unit is introduced into the airflow according to the prior art. Through the diversion guide type of the two inlets, the exhaust hole and the two external passages, a state in which a two-pneumatic driving space synchronously drives the rotor in a single cylinder chamber is formed, thereby achieving the advantages and practical progress of further improving the driving torque of the pneumatic tool. Sex.

Referring to Figures 1, 2 and 3, there is shown a preferred embodiment of the cylinder splitting structure of the pneumatic tool of the present invention, but the embodiments are for illustrative purposes only and are not limited by the structure in the patent application; The cylinder 10 is housed in a cavity 21 provided by a pneumatic tool 20 (which may be a pneumatic wrench). The cylinder 10 includes an annular cylinder wall 11 and an internal cylinder chamber 12, wherein the cylinder chamber 12 is provided for A rotor 30 is accommodated, and the rotor 30 is provided with a plurality of blades 31 to abut against the annular cylinder wall 11 of the cylinder 10, whereby the rotor 30 is pushed to rotate when the air pressure is introduced; the core design of the present invention comprises the following components: The rotor 30 is placed at an intermediate demarcation point in the cylinder chamber 12, and the cylinder chamber 12 is further divided to form a separate first air pressure driving space 41 and a second air pressure driving space 42 (as shown in FIG. 4). The first air pressure driving space 41 and the second air pressure driving space 42 each include an air intake section b1 (B1), a compression section b2 (B2), and a pressure relief section b3 (B3) (eg, 4th) As shown in the figure); the outer side of the annular cylinder wall 11 of the cylinder 10 corresponds to the first and second pneumatic driving spaces 41, 42 An intake and exhaust split control unit 50 is disposed at the boundary position to switch the pneumatic tool 20 to the use mode state of the rotor 30 in the forward or reverse direction; the outer side of the annular cylinder wall 11 of the cylinder 10 is provided with a first interval An outer passage 61 and a second outer passage 62, and one end of the first and second outer passages 61, 62 is in communication with the intake and exhaust split control portion 50; the annular cylinder wall 11 of the cylinder 10 is provided with a first An air inlet hole 71 communicates with the air inlet section b1 of the first air pressure driving space 41 and the intake and exhaust power splitting control unit 50; the annular cylinder wall 11 of the cylinder 10 is provided with a first exhaust hole 81 communicating with the first air pressure driving space. a pressure relief section b3 of the 41 and a first outer passage 61; the annular cylinder wall 11 of the cylinder 10 is provided with a second intake hole 72 communicating with the intake section B1 and the second outer passage of the second pneumatic drive space 42; The annular cylinder wall 11 of the 10 is provided with a second exhaust hole 82 communicating with the pressure relief section B3 of the second pneumatic drive space 42 and the intake and exhaust split control unit 50; wherein the specific structure of the intake and exhaust split control unit 50 is as follows As shown in FIG. 2, the valve tube 51 may be included and assembled to the valve tube 51. The flow path switching valve 52 is formed by a flow switching valve 52. The flow path switching valve 52 can include an air inlet groove 521, an air intake flow guiding portion 522, an exhaust gas guiding portion 523, and a turn button 524. The pneumatic tool 20 is provided with a pair of exhaust passages 22 (shown in FIGS. 2 and 3) that can be vertically communicated with the exhaust runner 523 so that the annular cylinder wall 11 One end of the first intake hole 71 and the second outer passage 62 are connected to the intake air guiding portion 523, and one end of the first outer passage 61 and the second exhaust hole 82 are both connected to the exhaust air. The portion 523 is in communication, and wherein the cross-sectional area of the second outer passage 62 is smaller than the cross-sectional area of the first outer passage 61, thereby causing the rotor 30 to be in the forward mode (ie, the state shown in FIGS. 5 and 6). The air pressure thrust of the second air pressure driving space 42 is smaller than the air pressure thrust of the first air pressure driving space 41, thereby mainly preventing the driving pressure from being excessively large in the forward mode.

Based on the above structural composition design, the operation of the preferred embodiment of the present invention will be described as follows: as shown in FIG. 5 (and shown in FIG. 4), the pneumatic tool 20 is used to drive the rotor 30 in the forward direction. In the mode state, the flow of the first forward flow W1 introduced by the intake and exhaust split control unit 50 is introduced into the first intake port 71 through the intake groove 521 provided in the flow path switching valve 52. The air pressure driving space 41 pushes the rotor 30, and then is discharged into the first outer passage 61 by the first exhaust hole 72, and then the air flow W1 is guided to the exhaust guide of the flow path switching valve 52 through the first outer passage 61. The flow portion 523 (see Fig. 2) is finally discharged from the exhaust passage 22.

As shown in FIG. 6 (and in conjunction with FIG. 4), the second forward flow W2 introduced by the intake and exhaust split control unit 50 is guided to the second through the first external passage 61. The air inlet hole 72 is configured to introduce the air flow W2 into the second air pressure driving space 42 to push the rotor 30. Since the cross-sectional area of the second outer passage 62 is smaller than the cross-sectional area of the first outer passage 61, the second air flow W2 pushes the rotor 30. The force path is small, and then the air flow W2 is discharged to the exhaust gas guiding portion 523 of the flow path switching valve 52 via the second exhaust hole 72, and finally discharged from the exhaust passage 22 (see Fig. 2).

Further, as shown in Fig. 8 (and in conjunction with Fig. 7), the pneumatic tool 20 is in a use mode state in which the rotor 30 is reversely driven, and the first reverse flow (W3) introduced by the intake and exhaust split control unit 50 is introduced. The flow direction is introduced into the first air pressure driving space 41 through the first exhaust hole 81 through the first exhaust passage 81 to the reverse thrust rotor 30, and then guided by the first air inlet hole 71 to the flow path switching valve 52. The exhaust gas guiding portion 523 (see Fig. 2) is finally discharged from the exhaust passage 22.

Next, as shown in FIG. 9 (and in conjunction with FIG. 7), the flow of the second reverse flow W4 introduced by the intake and exhaust split control unit 50 is first introduced through the second exhaust port 82. The reverse thrust rotor 30 is reversed in the second air pressure driving space 42, and then the air flow W4 is introduced into the second outer passage 62 via the second air inlet hole 72, and the air flow W4 is reversely guided to the flow path switching valve 52 through the second outer passage 62. The exhaust gas guiding portion 523 is finally discharged from the exhaust passage 22 (see Fig. 2). Thereby, a state in which the rotor 30 is simultaneously driven and compressed by the two-pressure driving space in a single cylinder chamber is constructed, whereby the torque of the driving rotor 30 can be multiplied without increasing the volume of the cylinder chamber 12 of the cylinder 10, To greatly increase the driving torque of pneumatic tools.

As shown in FIG. 3, the first outer passage 61 and the second outer passage 62 are formed by directly recessing the annular groove at the outer position of the annular cylinder wall 11 of the cylinder 10. By. In addition, the first outer passage 61 and the second outer passage 62 can also be formed by recessing annular grooves at intervals of the slots 21 of the pneumatic tool 20, which is also specifically achievable. Implementation type. As shown in FIGS. 10 and 11 , one end of the second outer passage 62 may also be an embodiment directly communicating with the exhaust passage 22 provided by the pneumatic tool 20 (ie, not passing through the flow path switching valve 52). Therefore, when the rotor 30 is in the forward mode, only the first air pressure driving space 41 is introduced into the state of the air pressure thrust, and when the rotor is in the reverse mode, the first and second are The air pressure driving spaces 41 and 42 are simultaneously introduced into the state of the pneumatic thrust compression driving rotor 30, which is also a structural form that can be embodied.

Advantages of the invention:

The cylinder splitting structure of the pneumatic tool disclosed in the present invention mainly includes the first and second air pressure driving spaces formed by the cylinder chamber, and the first and second outer passages are disposed outside the annular cylinder wall, and the first An external passage is configured to communicate the first intake port and the intake and exhaust split control portion, and the second external passage is configured to communicate the second intake port and the intake and exhaust split control portion with an innovative unique structural design, so that the present invention According to the prior art of the prior art, the crucible constitutes a state in which a two-pneumatic driving space synchronously drives the rotor in a single cylinder chamber, thereby achieving further without increasing the cylinder chamber volume of the cylinder. Improve the driving torque of pneumatic tools to better meet the needs of users and practical progress.

The above embodiments are intended to be illustrative of the present invention, and are not to be construed as limiting the scope of the invention. The principles are changed and modified to achieve an equivalent purpose, and such changes and modifications are to be included in the scope defined by the scope of the patent application as described later.

10. . . cylinder

11. . . Annular cylinder wall

12. . . Cylinder room

20. . . Pneumatic tool

twenty one. . . Crate

twenty two. . . Exhaust passage

30. . . Rotor

31. . . blade

41. . . First air pressure drive space

42. . . Second air pressure drive space

B1, B1. . . Intake section

B2, B2. . . Compressed segment

B3, B3. . . Pressure relief section

50. . . Intake and exhaust split control unit

51. . . Valve tube

52. . . Flow path switching valve

521. . . Air intake slot

522. . . Intake guide

523. . . Exhaust flow guide

524. . . Turn button

61. . . First external channel

62. . . Second external channel

71. . . First intake hole

72. . . Second intake hole

81. . . First vent

82. . . Second vent

W. . . Air pressure

W2. . . airflow

Figure 1 is a perspective view of a preferred embodiment of the pneumatic tool of the present invention.

Fig. 2 is an exploded perspective view of the preferred embodiment of the pneumatic tool of the present invention.

Figure 3 is a cross-sectional view of a partial member assembly of a preferred embodiment of the pneumatic tool of the present invention (taken along the axial direction of the rotor).

Fig. 4 is a perspective view showing the three-dimensional enlarged state and the forward flow path of the cylinder of the present invention.

Fig. 5 is a schematic view showing the first flow path of the forward drive rotor mode of the present invention (illustrated in the A-A cross section of Fig. 3).

Fig. 6 is a schematic view showing the first flow path of the forward drive rotor mode of the present invention (illustrated by the B-B cross section of Fig. 3).

Fig. 7 is a schematic view showing the three-dimensional enlarged state and the reverse flow path of the cylinder of the present invention.

Fig. 8 is a view showing the first flow path of the forward drive rotor mode of the present invention (illustrated in the A-A cross section of Fig. 3).

Fig. 9 is a schematic view showing the first flow path of the forward drive rotor mode of the present invention (illustrated by the B-B cross section of Fig. 3).

Fig. 10 is a perspective view showing an embodiment in which one end of the second outer passage of the present invention is directly connected to the exhaust passage provided by the pneumatic tool.

Figure 11 is a plan sectional view showing an embodiment in which one end of the second outer passage of the present invention is directly connected to the exhaust passage provided by the pneumatic tool.

10. . . cylinder

11. . . Annular cylinder wall

12. . . Cylinder room

61. . . First external channel

62. . . Second external channel

71. . . First intake hole

72. . . Second intake hole

81. . . First vent

82. . . Second vent

W1, W2. . . airflow

Claims (6)

A cylinder shunting structure of a pneumatic tool, the cylinder system is accommodated in a cavity provided by a pneumatic tool, the cylinder comprises an annular cylinder wall and an inner cylinder chamber, wherein the cylinder chamber is used for a rotor, the rotor The ring is provided with a plurality of blades to abut against the annular cylinder wall of the cylinder; the feature comprises: the rotor is placed at an intermediate demarcation point in the cylinder chamber, and the cylinder chamber is partitioned to form a separate first air pressure driving space And a second air pressure driving space; wherein the first air pressure driving space and the second air pressure driving space respectively comprise an air inlet section, a compression section and a pressure relief section; the outer side of the annular cylinder wall of the cylinder corresponds to the first and the first An intake and exhaust split control portion is disposed at a boundary position of the two air pressure driving spaces; a first outer passage and a second outer passage are disposed at intervals on the outer side of the annular cylinder wall of the cylinder, and the first and second portions are The external passage has one end connected to the intake and exhaust split control portion; the annular cylinder wall of the cylinder is provided with a first intake port communicating with the first air pressure driving space and an intake and exhaust split flow control The annular cylinder wall of the cylinder is provided with a first exhaust hole communicating with the first air pressure driving space and the first outer passage; the annular cylinder wall of the cylinder is provided with a second air inlet to communicate the second air pressure An air inlet section and a second outer passage of the driving space; the annular cylinder wall of the cylinder is provided with a second exhaust hole communicating with the pressure releasing section of the second air pressure driving space and the intake and exhaust flow dividing control portion; thereby, when the When the exhaust gas splitting control unit introduces the airflow, the diversion guide type of the two inlets, the exhaust holes and the two outer passages can be configured to form a state in which a two-pressure driving space synchronously drives the rotor in the single cylinder chamber, thereby lifting the pneumatic Torque of the tool. The cylinder shunting structure of the pneumatic tool according to the first aspect of the invention, wherein the first outer passage and the second outer passage are formed by directly recessing an annular groove at a position outside the annular cylinder wall of the cylinder. By. The cylinder shunting structure of the pneumatic tool according to the first aspect of the invention, wherein the first outer passage and the second outer passage are formed by recessing an annular groove at a groove spacing position of the pneumatic tool. The cylinder shunting structure of the pneumatic tool according to the first aspect of the invention, wherein the first intake hole and the first exhaust hole are when the air flow direction introduced by the intake and exhaust split control unit is reversely introduced. The intake and exhaust functions are interchanged, and the intake and exhaust between the second intake hole and the second exhaust hole are also interchanged. The cylinder shunting structure of the pneumatic tool according to the first aspect of the invention, wherein the intake and exhaust split control unit comprises a valve tube, and a flow path switching valve disposed in the valve tube in a rotary actuating state, The flow path switching valve includes an air intake groove, an intake air flow guiding portion, an exhaust gas guiding portion and a rotary control button, wherein the pneumatic tool is provided with an exhaust passage communicating with the exhaust gas guiding portion, so that One end of the first intake hole and the second outer passage are respectively connected to the intake air guiding portion, and one end of the first outer passage and the second exhaust hole are connected to the exhaust guide The cross-sectional area of the second outer passage is smaller than the cross-sectional area of the first outer passage, so that the air pressure thrust of the second air pressure driving space is smaller than the first air pressure driving space when the rotor is in the forward mode The air pressure thrust. The cylinder shunting structure of the pneumatic tool according to the first aspect of the invention, wherein the intake and exhaust split control unit comprises a valve tube, and a flow path switching valve disposed in the valve tube in a rotary actuating state, The flow path switching valve includes an air intake groove, an intake air flow guiding portion, an exhaust gas guiding portion and a rotary control button, wherein the pneumatic tool is provided with an exhaust passage communicating with the exhaust gas guiding portion, so that One end of the second outer passage is directly connected to the exhaust passage, and the first intake hole of the annular cylinder wall is connected to the intake air guiding portion, and one end of the first outer passage and the second exhaust hole are both Interacting with the exhaust gas guiding portion, so that the rotor is in the forward mode only when the first air pressure driving space is introduced into the air pressure thrust state, and when the rotor is in the reverse mode, the first and the first The two air pressure driving space synchronously introduces the state of the pneumatic thrust compression drive rotor.