TW202402480A - Pneumatic tool with rotary air valve positioning structure can position the rotary air valve to prevent the rotary air valve from rotating due to the impact of the reverse shock force - Google Patents

Abstract

The present invention provides a pneumatic tool, which includes a rotary air valve, a positioning member and an elastic member. The rotary air valve can be driven to rotate and is recessed with two positioning recesses that are spaced apart. The positioning member can be pushed by the elastic member to insert into one of the positioning recesses of the rotary air valve. When the positioning member inserts into the positioning recess, it will engage with the rotary air valve and restrict the rotation of the rotary air valve. The present invention realizes the positioning of the rotary air valve through the positioning member and the elastic member. When the pneumatic tool is operated to perform an output, the self-rotation of the rotary air valve can be prevented due to the impact of the reverse shock force. The direction of the torque output of the pneumatic tool can be prevented from being switched without the user's knowledge to cause danger in subsequent use. Accordingly, a pneumatic tool with a rotary air valve positioning structure that can improve the safety of use is provided.

Description

Pneumatic tools with rotary air valve positioning structure

This invention relates to pneumatic tools, especially a pneumatic tool with a rotary air valve positioning structure.

Existing pneumatic tools include structures such as intake and exhaust lines, pneumatic motors, and output mechanisms. Compressed air is input into the pneumatic motor through the intake and exhaust lines, causing the pneumatic motor to rotate and drive the output mechanism to act. Similar operations are performed through the hammering group of the output mechanism. The hammering movement can produce torque output; among them, the intake and exhaust lines are equipped with a rotary air valve that can be driven to rotate. The user can change the path of the compressed air by driving the rotary air valve to rotate, thereby adjusting the steering of the pneumatic motor and turning the air. The effect of switching the output torque of a pneumatic tool between forward or reverse rotation.

However, as the design of the output torque of pneumatic tools becomes higher and higher, in actual use of pneumatic tools, the backlash force received by pneumatic tools is also higher, which may cause the rotary air valve of the intake and exhaust lines to be driven by the above-mentioned backlash force. The automatic rotation causes the steering of the pneumatic motor to change without the user's knowledge, and subsequently switches the direction of the output torque of the pneumatic tool, resulting in an increased chance of industrial safety accidents when using the pneumatic tool, and the use of the pneumatic tool is dangerous. Higher sex.

In order to solve the problem that the output torque of pneumatic tools is getting higher and higher. In actual use, the anti-shock force may drive the rotary air valve to rotate on its own, switching the output direction of the pneumatic tool without the user's knowledge, causing danger in use. The purpose of this invention is to propose a pneumatic tool with a rotary air valve positioning structure that can position the rotary air valve, prevent the rotary air valve from rotating due to the impact of the anti-shock force, and increase the safety of use.

The pneumatic tool with a rotary valve positioning structure proposed by this creation to solve the technical problem includes: a shell; An air valve installation space is formed in the housing; A rotary air valve that can be driven and rotated in the air valve installation space, and the rotary air valve is recessed with two spaced apart positioning recesses; and a positioning member, which is provided in the housing and is pressed against the rotary air valve by an elastic member; Wherein, each of the positioning recesses can move to a position corresponding to the positioning member or away from the positioning member as the rotary air valve rotates; when one of the positioning recesses moves to a position corresponding to the positioning member, the positioning member is elastically affected by the elasticity. The piece pushes against and extends into one of the positioning recesses to catch the rotary air valve and restrict the rotation of the rotary air valve.

The pneumatic tool with a rotary air valve positioning structure includes a mounting hole, which is formed in the housing along a linear direction and is connected to the air valve installation space; the positioning member can move along the The elastic member is movably provided in the installation hole in a linear direction; the elastic member is provided in the installation hole, one end of the elastic member is fixed in the installation hole, and the other end of the elastic member is against the positioning member.

The pneumatic tool with a rotary air valve positioning structure includes a connection hole, which is between the installation hole and the air valve installation space, and communicates with the installation hole and the air valve installation space; the positioning hole The component includes a base part and a protruding rod part; the base part is located in the mounting hole, and the outer diameter of the base part is larger than the hole diameter of the connecting hole; the protruding rod part is connected to one end of the base part, passes through the connecting hole and abuts on the rotary air valve.

In the pneumatic tool with a rotary air valve positioning structure, each of the positioning recesses forms an arc surface corresponding to the rotary air valve; when the positioning member is pressed by the elastic member and extends into the positioning recess, the protrusion The rod portion abuts against the arc surface corresponding to the positioning recess.

In the pneumatic tool with a rotary air valve positioning structure, the protruding rod portion has a hemispherical abutting end; when the positioning member extends into the positioning recess, the protruding rod portion is supported by the abutting end. The end abuts against the arc surface corresponding to the positioning recess.

In the pneumatic tool with a rotary air valve positioning structure, the elastic member is a compression spring; the base of the positioning member is tubular and is sleeved with the elastic member.

The pneumatic tool with a rotary air valve positioning structure includes two forward and reverse switching buttons connected with the rotary air valve; the housing includes a switching button mounting part, and the two forward and reverse switching buttons are installed on the switching button Installation part; the air valve installation space is located between the installation hole and the switch button installation part.

The pneumatic tool with a rotary air valve positioning structure includes a trigger; the housing includes a trigger installation part, and the air valve installation space is located between the trigger installation part and the switch button installation part, and the trigger installation part There is a trigger mounting slot in the trigger mounting portion; the mounting hole extends from the bottom of the trigger mounting slot along the linear direction toward the air valve installation space.

The pneumatic tool with a rotary air valve positioning structure includes a setting sleeve; the elastic member and the positioning member are installed in the setting sleeve, and the setting sleeve is combined in the mounting hole.

In the pneumatic tool with a rotary air valve positioning structure, the setting sleeve includes an annular groove, and the annular groove is recessed in the inner circumferential surface of the setting sleeve; the pneumatic tool also includes a fixing buckle and a cushion block. The fixing buckle is embedded in the annular groove of the setting sleeve; one end of the elastic component presses the pad against the fixing buckle, and the other end of the elastic component abuts the positioning component.

The improvement that can be achieved by the technical means of this invention is that the pneumatic tool of this invention has a rotary air valve positioning structure. As the rotary air valve rotates, one of the positioning recesses will move to a position corresponding to the positioning member, and the positioning recess will move to a position corresponding to the positioning member. The member will be pushed by the elastic member and extend into one of the positioning recesses, thereby blocking the rotary air valve and limiting the rotation of the rotary air valve. The rotation of the rotary air valve is realized through the elastic member and the positioning member. Positioning, when operating a pneumatic tool, can prevent the rotary air valve from rotating due to the impact of the counter-shock force of the torque output by the pneumatic tool, and prevent the direction of the torque output by the pneumatic tool from being switched without the user's knowledge. Improve the safety of use of pneumatic tools.

In order to understand the technical characteristics and practical effects of this invention in detail, and to realize it according to the content of the invention, the preferred embodiment as shown in the figure is further described in detail as follows:

As shown in Figures 1 to 4, a pneumatic tool 90 with a rotary valve positioning structure according to the preferred embodiment of the present invention includes two forward and reverse switching buttons 91 for switching the direction of the torque output by the pneumatic tool 90, and a A switch button mounting part 92 for installing two forward and reverse switching buttons 91, a trigger 93 for controlling the output of the pneumatic tool 90, a trigger mounting part 94, and a rotary air valve positioning structure, wherein the switch button mounting part 92 and the trigger mounting part 94 are part of a housing of the pneumatic tool 90, and the trigger 93 is removably installed in a trigger mounting groove of the trigger mounting part 94; the rotary air valve positioning structure includes an air valve There is a setting space S, a rotary air valve 10, a mounting hole 20, a connecting hole 30, a setting sleeve 40, a fixing buckle 50, a cushion block 60, an elastic member 70 and a positioning member 80.

As shown in FIGS. 4 to 6 , the air valve installation space S is formed in the housing of the pneumatic tool 90 and is located between the switch button mounting part 92 and the trigger mounting part 94 ; the rotary air valve 10 is Located in the air valve installation space S, as shown in Figure 6, two airtight washers 95 are provided between the rotary air valve 10 and an annular wall at the edge of the air valve installation space S. Each of the airtight washers 95 95 surrounds the rotary air valve 10 and is close to the rotary air valve 10 and the above-mentioned annular wall; as shown in Figure 5 and Figure 7, in this preferred embodiment, the rotary air valve 10 has two sets of meshing teeth 11. Each set of the meshing tooth portions 11 can mesh with the rack portion on the corresponding one of the forward and reverse switching buttons 91. By pressing the forward and reverse switching buttons 91, the rotary air valve 10 can be driven clockwise or Counterclockwise rotation achieves the effect of switching the torque output by the pneumatic tool 90 between forward or reverse rotation. In fact, as long as the two forward and reverse switching buttons 91 are connected to the rotary air valve 10 and can drive the rotation respectively. The air valve 10 rotates in two opposite directions. The two forward and reverse switching buttons 91 are connected to the rotary air valve 10 in a form that can be selected from any known pneumatic tool on the market, and is not limited to this preferred embodiment. restricted.

As shown in FIGS. 5 and 7 , the rotary air valve 10 is recessed with two spaced apart positioning recesses 12 , and each of the positioning recesses 12 is recessed along a radial direction of the corresponding rotary air valve 10 ; The two positioning recesses 12 and the two sets of meshing teeth 11 are arranged around a rotation axis of the rotary air valve 10. The two positioning recesses 12 are located between the two sets of meshing teeth 11, and each positioning recess 12 is adjacent to the corresponding one. A set of meshing teeth 11; each positioning recess 12 forms an arc surface corresponding to the rotary air valve 10.

As shown in FIGS. 4 and 7 , the mounting hole 20 is formed in the housing of the pneumatic tool 90 and extends from the bottom of the trigger mounting groove of the trigger mounting portion 94 toward the air valve installation space along a linear direction D. S extends, and the mounting hole 20 is connected to the outside of the pneumatic tool 90 through the trigger mounting groove, as shown in Figure 7. The linear direction D passes through the rotation axis of the rotary air valve 10; as shown in Figure 4 , the connection hole 30 is between the installation hole 20 and the air valve installation space S, and communicates the installation hole 20 with the air valve installation space S, wherein the aperture of the connection hole 30 is smaller than the aperture of the installation hole 20 .

As shown in Figures 5 and 7, the setting sleeve 40 is combined in the mounting hole 20. In this preferred embodiment, the setting sleeve 40 is tightly coupled to the mounting hole 20; as shown in Figure 4 As shown, the setting sleeve 40 includes a setting hole 41 and an annular groove 42; the setting hole 41 is formed by the inner peripheral surface of the setting sleeve 40, and the setting sleeve 40 is formed with the setting hole 41 along the linear direction D. The placement method is combined into the mounting hole 20, and the setting hole 41 is connected with the air valve setting space S through the connecting hole 30; as shown in Figure 4, the annular groove 42 is recessed on the inner periphery of the setting sleeve 40 surface, surrounds the setting hole 41, and is located at a position where the setting sleeve 40 is close to the trigger mounting portion 94; as shown in Figure 4, the fixing buckle 50 is a C-shaped buckle, and the fixing buckle 50 is embedded in the setting sleeve. 40 ring ditch 42.

As shown in FIGS. 5 and 7 , the pad 60 and the elastic member 70 are disposed in the installation hole 41 of the installation sleeve 40 . The elastic member 70 can expand and contract along the linear direction D, and the positioning member 80 can extend along the linear direction D. The setting hole 41 of the setting sleeve 40 is movably inserted in the linear direction D, wherein the extension line of the positioning member 80 along the linear direction D passes between the two forward and reverse switching buttons 91; one end of the elastic member 70 It is fixed in the setting hole 41, and the other end presses the positioning member 80 against the rotary air valve 10. Specifically, as shown in Figure 7, one end of the elastic member 70 presses the cushion block 60 against the The fixing buckle 50 is fixed at a fixed position in the setting hole 41, and the other end of the elastic member 70 can push against the positioning member 80 to move; as shown in Figure 4, the positioning member 80 includes a base 81 and a As shown in FIG. 4 and FIG. 7 , the base part 81 of the protruding rod part 82 is provided in the setting sleeve 40 and located in the mounting hole 20 . The base part 81 is tubular. In this preferred embodiment, the elastic member 70 is a compression spring, and the base portion 81 is sleeved on one end of the elastic member 70; the protruding rod portion 82 is connected to one end of the base portion 81, passes through the connecting hole 30, and abuts against the rotary air valve 10, wherein , the convex rod portion 82 has a hemispherical abutment end, and the convex rod portion 82 abuts against the rotary air valve 10 with the abutment end.

In this preferred embodiment, the fixing buckle 50, the pad 60, the elastic member 70 and the positioning member 80 are installed in the setting sleeve 40, and then the setting sleeve 40 is combined into the mounting hole 20. In fact, the fixing buckle 50 , the pad 60 , the elastic member 70 and the positioning member 80 can be directly installed in the installation hole 20 , eliminating the need for the installation sleeve 40 and not subject to this preferred embodiment. However, the advantage of this preferred embodiment is that through the setting sleeve 40, the fixing buckle 50, the cushion block 60, the elastic member 70 and the positioning member 80 can be installed in advance outside the pneumatic tool 90 during installation. After the installation sleeve 40 is inserted into the installation hole 41, the installation sleeve 40 is then combined into the installation hole 20, thereby improving the convenience of the assembly operation of the present invention.

The pneumatic tool 90 with a rotary valve positioning structure according to the preferred embodiment of the present invention is used as follows: in the state shown in Figure 7, one of the forward and reverse switching buttons 91 of the pneumatic tool 90 has been pressed. , the torque output by the pneumatic tool 90 is in one of the forward or reverse states. At this time, one of the positioning recesses 12 of the rotary air valve 10 is facing the connecting hole 30 , and the positioning member 80 is pressed by the elastic member 70 Push, the protruding rod portion 82 extends into one of the positioning recesses 12, and the abutting end of the protruding rod portion 82 abuts the arc surface formed by one of the positioning recesses 12, whereby the positioning member 80 is locked The rotary air valve 10, combined with the friction generated by the two air-tight washers 95 shown in Figure 6, can limit the rotation of the rotary air valve 10 and position the rotary air valve 10.

As shown in Figure 8, when the user wants to switch the direction of the torque output by the pneumatic tool 90, he presses another forward and reverse switching button 91, so that the other forward and reverse switching button 91 drives the rotary air valve 10 as shown in the figure. 8 rotates clockwise, and at the same time, one of the forward and reverse switching buttons 91 that was originally pressed is driven by the rotary air valve 10 and returns to its original position; during the rotation of the rotary air valve 10, the external force exerted by the user Resisting the elastic force of the elastic member 70, the friction force between the protruding rod portion 82 and the rotary air valve 10, and the friction force generated by the two air-tight washers 95, the abutting end of the protruding rod portion 82 follows the As the rotary air valve 10 rotates, it moves along the arc formed corresponding to one of the positioning recesses 12, and gradually breaks away from one of the positioning recesses 12, and instead leans against the rotary air valve 10 at the two positioning recesses. 12, the elastic member 70 is compressed tighter; as the user continues to press the other forward and reverse switching button 91 to drive the rotary air valve 10 to rotate, one of the positioning recesses 12 gradually moves away from the The other positioning recess 12 gradually approaches the positioning member 80 .

Finally, after completing the switching action of pressing the other forward and reverse switching button 91, the other positioning recess 12 will move to a position facing the connecting hole 30 as the rotary air valve 10 rotates. At this time, The elastic force of the elastic member 70 will push against the positioning member 80, causing the protruding rod portion 82 of the positioning member 80 to extend into the other positioning recess 12, and the abutting end of the protruding rod portion 82 will abut against the other positioning member 80. The corresponding arc surface formed by the recessed portion 12 is used to lock the rotary air valve 10 and cooperate with the friction force generated by the two air-tight washers 95 to limit the rotation of the rotary air valve 10 and position the rotary air valve 10 ; The detailed operating methods and principles of other parts of the pneumatic tool 90 such as the air intake and exhaust, the pneumatic motor, and the output mechanism are common techniques in the field of pneumatic tools, so they will not be described in detail here.

During the above operation process, through the rotary air valve positioning structure of the pneumatic tool 90 , regardless of whether the direction of the torque output by the pneumatic tool 90 is switched to forward rotation or reverse rotation, one of the positioning recesses 12 will move to a position corresponding to the positioning member 80 position, and the positioning member 80 will be pushed by the elastic member 70 and extend into the positioning recess 12 , thereby catching the rotary air valve 10 and restricting the rotation of the rotary air valve 10 , thereby performing the operation on the rotary air valve 10 Positioning prevents the rotary air valve 10 from rotating due to the impact of the anti-shock force acting on the pneumatic tool 90, and prevents the pneumatic tool 90 from changing the direction of the output torque without the user's knowledge, which greatly improves the use of the pneumatic tool 90. Tool 90 process security.

In this preferred embodiment, through the corresponding arc surfaces formed on the rotary air valve 10 by each of the positioning recesses 12, when the user presses the forward and reverse switching button 91 to rotate the rotary air valve 10 , the positioning member 80 can move along the arc surface and disengage from the positioning recess 12 more smoothly, allowing the user to press the forward and reverse switching button 91 with less effort. In addition, in this preferred embodiment, , the abutting end of the protruding rod portion 82 is hemispherical, which further increases the smoothness of the positioning member 80 disengaging from the positioning recess 12 when the user applies force to rotate the rotary air valve 10, making it easier for the user to Press the forward and reverse switching button 91 firmly.

In addition, in this preferred embodiment, the positioning member 80 is disposed in the mounting hole 20 and is restricted, and can only move along the linear direction D passing through the rotation axis of the rotary air valve 10 to extend in or out. One of the positioning recesses 12 of the rotary air valve 10, in fact, the linear direction D can also be a direction parallel to the rotation axis of the rotary air valve 10. It is only necessary to set the positioning recess 12 correspondingly, so that the positioning The member 80 can extend into the positioning recess 12, and even the positioning member 80 can adopt a pivoting design; generally speaking, as long as the elastic member 70 presses the positioning member 80 against the rotary air valve 10 , the positioning recess 12 can move to a position corresponding to the positioning member 80 as the rotary air valve 10 rotates, and the positioning member 80 can be pushed by the elastic member 70 and extend into the positioning recess 12 to achieve a lock. The rotary air valve 10 restricts the rotation of the rotary air valve 10, thereby positioning the rotary air valve 10. The actual operating mode of the positioning member 80 is not limited by this preferred embodiment.

The above are only preferred embodiments of the present invention and do not impose any formal restrictions on the present invention. Anyone with ordinary knowledge in the technical field can use the present invention without departing from the scope of the technical solution proposed by the present invention. Equivalent embodiments with partial changes or modifications to the technical content disclosed in the creation, and which do not deviate from the content of the technical solution of this creation, still fall within the scope of the technical solution of this creation.

10: Rotary air valve 11: Meshing teeth 12: Positioning the recess 20:Mounting holes 30:Connector hole 40: Setup set 41: Setting holes 42: Ring ditch 50:Fixed buckle 60: spacer 70: Elastic parts 80: Positioning parts 81:Base 82:Protruding rod part 90:Pneumatic tools 91: Forward and reverse switch button 92: Switch button installation part 93:Trigger 94: Trigger mounting part 95: Air sealing gasket D: Straight line direction S: Air valve setting space

Figure 1 is a three-dimensional top view of the preferred embodiment of the present invention. Figure 2 is a three-dimensional appearance view from below of the preferred embodiment of the present invention. Figure 3 is a perspective view of the preferred embodiment of the present invention with some components omitted. Figure 4 is a partially enlarged exploded view of some components of the preferred embodiment of the present invention. Figure 5 is a partially enlarged three-dimensional cross-sectional view of the preferred embodiment of the present invention. Figure 6 is a partially enlarged side cross-sectional view of the preferred embodiment of the present invention. Figure 7 is a top cross-sectional view of the preferred embodiment of the present invention. Figure 8 is a top cross-sectional view of another use state of the preferred embodiment of the present invention.

10: Rotary air valve

11: Meshing teeth

12: Positioning the recess

20:Mounting holes

30:Connector hole

40: Setup set

60: spacer

70: Elastic parts

80: Positioning parts

91: Forward and reverse switch button

92: Switch button installation part

94: Trigger mounting part

S: Air valve setting space

Claims (10)

A pneumatic tool with a rotary air valve positioning structure, which includes: a shell; An air valve installation space is formed in the housing; A rotary air valve that can be driven and rotated in the air valve installation space, and the rotary air valve is recessed with two spaced apart positioning recesses; and a positioning member, which is provided in the housing and is pressed against the rotary air valve by an elastic member; Wherein, each of the positioning recesses can move to a position corresponding to the positioning member or away from the positioning member as the rotary air valve rotates; when one of the positioning recesses moves to a position corresponding to the positioning member, the positioning member is elastically affected by the elasticity. The piece pushes against and extends into one of the positioning recesses to catch the rotary air valve and restrict the rotation of the rotary air valve. The pneumatic tool with a rotary air valve positioning structure as described in claim 1, which includes a mounting hole formed in the housing along a linear direction and connected with the air valve installation space; the positioning member The elastic member is movably provided in the installation hole along the linear direction; the elastic member is provided in the installation hole, one end of the elastic member is fixed in the installation hole, and the other end of the elastic member is against the positioning member . The pneumatic tool with a rotary air valve positioning structure as described in claim 2, which includes a connection hole that is between the installation hole and the air valve installation space and communicates with the installation hole and the air valve installation space. space; the positioning member includes a base part and a protruding rod part; the base part is located in the installation hole, and the outer diameter of the base part is larger than the hole diameter of the connection hole; the protruding rod part is connected to one end of the base part and passes through the connection hole. hole and against the rotary air valve. The pneumatic tool with a rotary air valve positioning structure as described in claim 3, wherein each of the positioning recesses forms an arc surface corresponding to the rotary air valve; the positioning member is pressed by the elastic member and extends into the positioning recess. When the positioning concave portion is positioned, the protruding rod portion abuts against the arc surface corresponding to the positioning concave portion. The pneumatic tool with a rotary air valve positioning structure as described in claim 4, wherein the protruding rod portion has a hemispherical abutment end; when the positioning member extends into the positioning recess, the protruding rod portion is The abutting end is used to abut against the arc surface corresponding to the positioning recess. The pneumatic tool with a rotary air valve positioning structure as described in claim 3, wherein the elastic member is a compression spring; the base of the positioning member is in a tubular shape and is sleeved with the elastic member. The pneumatic tool with a rotary air valve positioning structure as described in claim 2, which includes two forward and reverse switching buttons connected to the rotary air valve; the housing includes a switching button mounting part, and the two forward and reverse switching buttons are installed In the switching button mounting portion; the air valve installation space is located between the mounting hole and the switching button mounting portion. The pneumatic tool with a rotary air valve positioning structure as described in claim 7, which includes a trigger; the housing includes a trigger installation part, and the air valve installation space is located between the trigger installation part and the switch button installation part, The trigger is installed in a trigger installation groove of the trigger installation part; the installation hole extends from the bottom of the trigger installation groove along the linear direction toward the air valve installation space. The pneumatic tool with a rotary air valve positioning structure as described in any one of claims 2 to 8, which includes a setting sleeve; the elastic member and the positioning member are installed on the setting sleeve, and the setting sleeve is combined with the mounting hole within. The pneumatic tool with a rotary air valve positioning structure as described in claim 9, wherein the setting sleeve includes an annular groove that is recessed on the inner peripheral surface of the setting sleeve; the pneumatic tool also includes a fixing buckle and A pad, the fixing buckle is embedded in the annular groove of the setting cover; one end of the elastic component presses the pad against the fixing buckle, and the other end of the elastic component abuts the positioning component.

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