TWI809970B - Pneumatic tool with rotary air valve positioning structure - Google Patents

Abstract

The invention provides a pneumatic tool, which includes a rotary air valve, a positioning piece and an elastic piece; the rotary air valve can be driven to rotate, and is provided with two spaced positioning recesses; the positioning piece can be pushed into by the elastic piece One of the positioning recesses of the rotary air valve is provided with a base and a protruding rod. When the protruding rod of the positioning piece extends into the positioning recess, it will lock the rotary air valve and limit the rotation of the rotary air valve; this creation uses the positioning piece and The elastic part realizes the positioning of the rotary air valve. When operating the output of the pneumatic tool, it can prevent the rotary air valve from rotating automatically due to the impact of the shock force, and prevent the direction of the torque output by the pneumatic tool from being changed without the user's knowledge. Switching will cause danger in subsequent use, and a pneumatic tool with a rotary air valve positioning structure that can improve safety in use is provided.

Description

Pneumatic tool with rotary air valve positioning structure

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

Existing pneumatic tools include structures such as intake and exhaust passages, air motors, and output mechanisms. Compressed air is input into the air motor through the intake and exhaust passages to make the air motor rotate and drive the output mechanism to operate. Similar The movement of hammering can generate torque output; among them, the intake and exhaust passages are equipped with a rotary air valve that can be driven to rotate, and the user can change the path of compressed air by driving the rotary air valve to adjust the steering of the air motor The effect of switching the output torque of the pneumatic tool between forward rotation and reverse rotation.

However, as the design of the output torque of the pneumatic tool is getting higher and higher, the anti-shock force suffered by the pneumatic tool is also higher in the actual use of the pneumatic tool, which may cause the rotary air valve of the intake and exhaust passage to be driven by the above-mentioned anti-shock force And the automatic rotation causes the steering of the air motor to change without the user's knowledge, and then switches the direction of the output torque of the air tool, resulting in an increase in the probability of industrial safety accidents when using the air tool in the future. Sex is higher.

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

The pneumatic tool with rotary air valve positioning structure proposed in this creation to solve technical problems includes: a housing; an air valve setting space formed in the housing; a rotary air valve that can be driven to It is rotatably arranged in the air valve installation space, and the rotary air valve is recessed with two spaced positioning recesses; a mounting hole is formed in the housing along a straight line and is connected with the air valve installation space through; a connection hole, the connection hole is between the installation hole and the air valve installation space, and communicates with the installation hole and the air valve installation space; and a positioning piece, which is arranged in the housing and can It is movably arranged in the installation hole along the linear direction, and is pressed against the rotary air valve by an elastic member. The elastic member is arranged in the installation hole, and one end of the elastic member is fixed in the installation hole. The other end of the elastic member is against the locating member, the locating member includes a base and a protruding rod, the base is located in the mounting hole, the protruding rod is connected to one end of the base, passes through the connecting hole and Abut against one of the positioning recesses of the rotary air valve; wherein, each of the positioning recesses can move to the position corresponding to the positioning piece or away from the positioning piece as the rotary air valve rotates; when one of the positioning recesses moves to the corresponding When the position of the locating part is fixed, the protruding rod part of the locating part is pushed by the elastic part and extends into one of the locating recesses to lock the rotary air valve and limit the rotation of the rotary air valve.

In the pneumatic tool with a rotary air valve positioning structure, the outer diameter of the base is larger than the diameter of the connecting hole.

In the pneumatic tool with a positioning structure for a rotary air valve, each of the positioning recesses forms an arc surface corresponding to the rotary air valve; The rod abuts against the arc surface corresponding to the positioning recess.

Said pneumatic tool with rotary air valve positioning structure, wherein said protruding rod part has a hemispherical abutting end; The end abuts against the arc surface corresponding to the positioning recess.

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

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

The pneumatic tool with a rotary air valve positioning structure includes a trigger; the housing includes a trigger installation part, the air valve installation space is located between the trigger installation part and the switch button installation part, the trigger installation A trigger installation groove in the trigger installation part; the installation hole extends from the groove bottom of the trigger installation groove along the straight line toward the air valve installation space.

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

The pneumatic tool with a rotary valve positioning structure, wherein the setting sleeve includes a ring groove, and the ring groove is recessed on the inner peripheral surface of the setting sleeve; the pneumatic tool also includes a fixing buckle and a spacer, The fixing buckle is inserted into the ring groove of the setting sleeve; one end of the elastic member presses the pad against the fixing buckle, and the other end of the elastic member leans against the positioning member.

The effect improvement obtained by the technical means of this creation lies in: the pneumatic tool with the rotary air valve positioning structure of this creation, as the rotary air valve rotates, one of the positioning recesses will move to the position corresponding to the positioning piece, and the positioning The part will be pushed by the elastic part and extend into one of the positioning recesses, thereby clamping the rotary air valve and restricting the rotation of the rotary air valve, and realizing the positioning of the rotary air valve through the elastic part and the positioning part Positioning, when operating the pneumatic tool, can prevent the rotary air valve from being affected by the pneumatic tool The output torque is affected by the anti-shock force to rotate automatically, preventing the direction of the output torque of the pneumatic tool from being switched without the user's knowledge, improving the safety of the pneumatic tool in use.

10: Rotary air valve

11: Meshing gear

12: Positioning recess

20: Mounting hole

30: Connecting hole

40: Setting sets

41: setting hole

42: ring ditch

50: fixed buckle

60: spacer

70: Elastic parts

80: positioning parts

81: base

82: Convex part

90: Pneumatic tools

91: Forward and reverse switching button

92: Switch button installation part

93: Trigger

94: Trigger installation part

95: airtight gasket

D: Straight direction

S: air valve setting space

Fig. 1 is the three-dimensional exterior view of the top view of the preferred embodiment of the invention.

Fig. 2 is the three-dimensional exterior view of the preferred embodiment of the creation looking up.

Fig. 3 is a perspective view of a preferred embodiment of the invention with some components omitted.

Fig. 4 is an exploded view of partial components of a preferred embodiment of the invention.

Fig. 5 is a partially enlarged three-dimensional sectional view of a preferred embodiment of the invention.

Fig. 6 is the sectional view of the partially enlarged side view of the preferred embodiment of the invention.

Fig. 7 is the cross-sectional view of the top view of the preferred embodiment of the present invention.

Fig. 8 is a top sectional view of another use state of the preferred embodiment of the present invention.

In order to understand in detail the technical characteristics and practical effects of this creation, and to realize it according to the content of the creation, the preferred embodiment shown in the figure is further described in detail as follows: as shown in Figures 1 to 4, this invention Create a pneumatic tool 90 with a rotary air valve positioning structure in a preferred embodiment, which includes two forward and reverse switching buttons 91 for switching the direction of the torque output by the pneumatic tool 90, and a front and reverse switching knob 91 installed with two Switch button installation part 92, a trigger 93 for controlling the output of the pneumatic tool 90, a trigger installation part 94, and a rotary air valve positioning structure, wherein the switch button installation part 92 and the trigger installation part 94 are the A part of a housing of the pneumatic tool 90, and the trigger 93 is detachably installed in a trigger mounting groove of the trigger mounting part 94; the rotary air valve positioning structure includes an air valve 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 spacer 60 , an elastic member 70 and a positioning member 80 .

As shown in Figures 4 to 6, the air valve setting space S is formed in the housing of the pneumatic tool 90, and is located between the switch button installation part 92 and the trigger installation part 94; the rotary air valve 10 is Located in the air valve installation space S, wherein, as shown in Figure 6, two airtight gaskets 95 are arranged between the rotary air valve 10 and a ring wall at the edge of the air valve installation space S, each of the airtight gaskets 95 surrounds the rotary air valve 10, and is close to the rotary air valve 10 and the above-mentioned ring 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 engaging teeth 11 can engage with the rack portion on one of the corresponding forward and reverse switch buttons 91, and the rotary air valve 10 can be driven clockwise or clockwise by pressing the forward and reverse switch button 91. Turn counterclockwise to achieve the effect of switching the output torque of the pneumatic tool 90 between forward rotation and reverse rotation, but in fact, as long as the two forward and reverse switching buttons 91 are connected with the rotary air valve 10, and can drive the rotary valve 10 respectively The air valve 10 rotates in two opposite directions. The form of the connection between the two forward and reverse switching buttons 91 and the rotary air valve 10 can be selected from any known air tool on the market, and is not limited by this preferred embodiment. restricted.

As shown in Figures 5 and 7, the rotary air valve 10 is recessed with two spaced positioning recesses 12, and each positioning recess 12 is recessed along a radial direction of the corresponding rotary air valve 10; Two positioning recesses 12 and the two sets of engaging 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 engaging teeth 11, and each positioning recess 12 is adjacent to the corresponding A set of said meshing teeth 11 ; each positioning recess 12 forms an arc surface corresponding to the rotary air valve 10 .

As shown in Figures 4 and 7, the installation hole 20 is formed in the housing of the pneumatic tool 90, and is from the bottom of the trigger installation groove of the trigger installation part 94 along a straight line direction D toward the air valve installation space. S is extended, and the installation hole 20 communicates with the outside of the pneumatic tool 90 through the trigger installation 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 with the installation hole 20 and the air valve installation space S, wherein the diameter of the connection hole 30 is smaller than that of the installation hole 20 .

As shown in Figure 5 and Figure 7, the setting sleeve 40 is combined in the mounting hole 20, in this preferred embodiment, the setting sleeve 40 is combined in the mounting hole 20 in a tight fit; as shown in Figure 4 Shown, the setting sleeve 40 includes a setting hole 41 and a ring groove 42; The placement method is combined into the installation hole 20, and the installation hole 41 communicates with the air valve installation space S through the connection hole 30; as shown in Figure 4, the ring groove 42 is recessed in the inner circumference of the installation sleeve 40 surface, surrounds the setting hole 41, and is located at the position where the setting sleeve 40 is close to the trigger installation part 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 The annular groove 42 of 40.

As shown in Figure 5 and Figure 7, the spacer 60 and the elastic member 70 are arranged in the setting hole 41 of the setting sleeve 40, the elastic member 70 can expand and contract along the straight line direction D, and the positioning member 80 can extend along the The linear direction D is movably inserted into the setting hole 41 of the setting sleeve 40, 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 FIG. 7, one end of the elastic member 70 presses the pad 60 against the The fixing buckle 50 is fixed on the fixed position in the setting hole 41, and the other end of the elastic member 70 can push against the locating member 80; as shown in Figure 4, the locating member 80 includes a base 81 and a The protruding part 82, as shown in Figure 4 and Figure 7, the base 81 is set in the setting sleeve 40, and is located in the installation hole 20, the base 81 is tubular, in this preferred embodiment, the elastic member 70 is a compression spring, the base 81 is sleeved on one end of the elastic member 70; the protruding rod 82 is connected to one end of the base 81, passes through the connecting hole 30 and leans against the rotary air valve 10, wherein The protruding rod portion 82 has a hemispherical abutting end, and the protruding rod portion 82 abuts against the rotary air valve 10 through the abutting end.

In this preferred embodiment, the fixing buckle 50, the spacer 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 installation hole 20, In fact, the fixing buckle 50, the spacer 60, the elastic member 70 and the positioning member 80 can be directly arranged in the mounting hole 20, and the setting of the setting sleeve 40 is omitted, which is not limited by this preferred embodiment. limited by this preferred embodiment The advantage is that, through the setting sleeve 40, the fixing buckle 50, the spacer 60, the elastic member 70 and the positioning member 80 can be installed in the setting hole 41 of the setting sleeve 40 outside the pneumatic tool 90 during installation. Afterwards, the setting sleeve 40 is combined into the installation hole 20 to improve the convenience of the assembly operation of the present invention.

The use of the pneumatic tool 90 with a rotary air valve positioning structure in the preferred embodiment of the present invention is 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 states of forward rotation or reverse rotation. 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 supported by the elastic member 70. push, so that the protruding rod portion 82 extends into one of the positioning recesses 12, and the abutting end of the protruding rod portion 82 abuts against the arc surface formed by one of the positioning recesses 12, and the positioning member 80 is thus locked. The rotary air valve 10 , together with the friction generated by the two air-tight gaskets 95 shown in FIG. 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 Fig. 8 in the clockwise direction, 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 to return to its original position; during the rotation of the rotary air valve 10, the external force exerted by the user Resist the elastic force of the elastic member 70, the friction force between the protruding rod part 82 and the rotary air valve 10, and the friction force generated by the two air-tight gaskets 95, so that the abutting end of the protruding rod part 82 follows As the rotary air valve 10 rotates, it moves along the arc surface 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, while the elastic member 70 is compressed more tightly; 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 positioning piece 80 , while the other positioning recess 12 gradually approaches the positioning piece 80 .

Finally, after the switching action of pressing the other forward and reverse switching button 91 is completed, the other positioning recess 12 will move to the 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 locating member 80, so that the protruding rod portion 82 of the locating member 80 will extend into the other positioning recess 12, and the abutting end of the protruding rod portion 82 will abut against the positioning member 80. The arc surface corresponding to the other positioning recess 12 is used to hold the rotary air valve 10, and cooperate with the friction force generated by the two air-tight gaskets 95 to limit the rotation of the rotary air valve 10. The valve 10 is positioned; the detailed operation methods and principles of other parts such as the air intake and exhaust, air motor and output mechanism of the air tool 90 belong to the known technology in the field of air tools, so they will not be described in detail here. .

During the above-mentioned operation process, through the rotary air valve positioning structure of the pneumatic tool 90, no matter 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 the 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 clamping the rotary air valve 10 and limiting the rotation of the rotary air valve 10, and the rotary air valve 10 positioning to prevent the rotary air valve 10 from rotating automatically under the influence of the anti-vibration force acting on the pneumatic tool 90, and prevent the pneumatic tool 90 from changing the direction of the output torque without the user's knowledge, greatly improving the use of the pneumatic tool. Process security of tool 90 .

In this preferred embodiment, through the arc surfaces corresponding to the rotary air valve 10 formed by each of the positioning recesses 12, the rotary air valve 10 is rotated when the user presses the forward and reverse switching button 91 , the positioning member 80 can move along the arc surface and get away from the positioning recess 12 more smoothly, so that the user can press the forward and reverse switching button 91 with less effort. In addition, in this preferred embodiment , the abutment end of the protruding rod portion 82 is hemispherical, and when the user exerts force to rotate the rotary air valve 10, the smoothness of the positioning member 80 detaching from the positioning concave portion 12 is increased, so that the user can more easily Press the forward and reverse switching button 91 firmly.

In addition, in this preferred embodiment, the locating member 80 is set in the installation 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, so as to protrude into or disengage from it. 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, and only the positioning recess 12 needs to be provided correspondingly to make the positioning It is sufficient that the positioning member 80 can extend into the positioning recess 12, and even the positioning member 80 can adopt a pivoting design; in general, 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 the position corresponding to the positioning member 80 with the rotation of the rotary valve 10, and the positioning member 80 can be pushed by the elastic member 70 and extend into the positioning recess 12 to achieve locking The rotary air valve 10 restricts the rotation of the rotary air valve 10 so as to position the rotary air valve 10 . The actual actuation mode of the positioning member 80 is not limited by this preferred embodiment.

The above is only a preferred embodiment of this creation, and does not limit this creation in any form. Anyone with ordinary knowledge in the technical field can use this creation without departing from the scope of the technical solutions proposed in this creation. Creation of equivalent embodiments with partial changes or modifications made to the disclosed technical content, and without departing from the content of the technical solution of the creation, all still fall within the scope of the technical solution of the creation.

10: Rotary air valve

11: Meshing gear

12: Positioning recess

20: Mounting hole

30: Connecting hole

40: Setting sets

60: spacer

70: Elastic parts

80: positioning parts

91: Forward and reverse switching button

92: Switch button installation part

94: Trigger installation part

S: air valve setting space

Claims (9)

A pneumatic tool with a rotary air valve positioning structure, which includes: a housing; an air valve installation space formed in the housing; a rotary air valve, which can be driven and rotatably arranged on the air valve The installation space, the rotary air valve is concavely provided with two spaced positioning recesses; a mounting hole, the installation hole is formed in the housing along a straight line, and communicates with the air valve installation space; a connection hole, the The connection hole is between the installation hole and the air valve installation space, and communicates with the installation hole and the air valve installation space; in the installation hole, and is pressed against the rotary air valve by an elastic member, the elastic member is arranged 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 Leaning on the positioning part, the positioning part includes a base and a protruding rod part, the base part is located in the installation hole, the protruding rod part is connected to one end of the base part, passes through the connecting hole and abuts against the rotary air valve One of the positioning recesses; wherein, each of the positioning recesses can move to the position corresponding to the positioning member or away from the positioning member as the rotary valve rotates; when one of the positioning recesses moves to the position corresponding to the positioning member, The protruding rod portion of the positioning member is pushed by the elastic member and extends into one of the positioning recesses to lock the rotary air valve and limit the rotation of the rotary air valve. In the pneumatic tool with a rotary air valve positioning structure according to claim 1, the outer diameter of the base is larger than the diameter of the connecting hole. The pneumatic tool with a rotary air valve positioning structure as described in claim 2, 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 At this time, the protruding rod portion abuts against the arc surface corresponding to the positioning concave portion. The pneumatic tool with rotary air valve positioning structure as described in claim 3, wherein the protruding rod part has a hemispherical abutment end; Use the abutting end to abut against the arc surface corresponding to the positioning recess. The pneumatic tool with a rotary valve positioning structure as described in claim 2, wherein the elastic member is a compression spring; the base of the positioning member is in the shape of a tube, and the elastic member is sheathed. The pneumatic tool with a rotary air valve positioning structure as described in claim 1, which includes two forward and reverse switching buttons connected with the rotary air valve; the housing includes a switching button installation part, and the two forward and reverse switching buttons are installed In the switch 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 as described in claim 6, 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 switching button installation part, The trigger is installed in a trigger installation groove of the trigger installation part; the installation hole extends from the groove bottom of the trigger installation groove along the straight line toward the air valve installation space. The pneumatic tool with rotary air valve positioning structure according to any one of claims 1 to 7, 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 installation hole Inside. The pneumatic tool with rotary air valve positioning structure as described in claim 8, wherein the setting sleeve includes a ring groove, and the ring groove is recessed on the inner peripheral surface of the setting sleeve; the pneumatic tool also includes a fixing buckle and A spacer, the fixing buckle is embedded in the ring groove of the setting sleeve; one end of the elastic member presses the cushion block against the fixing buckle, and the other end of the elastic member leans against the positioning member.

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