TWM649094U - Pneumatic adjustable ratchet wrench - Google Patents

Abstract

The invention relates to a pneumatic telescopic ratchet wrench, which includes: a telescopic unit, which includes a first pipe member and a second pipe member. The first pipe member and the second pipe member are movably combined with each other. The telescopic unit is provided with a gas flow channel; a driving mechanism, which is located on the telescopic unit and communicates with the gas flow channel, the driving mechanism includes a driving head and a transmission unit, the transmission unit can drive the driving head; and a switch unit, which is located on the telescopic unit unit to control the external air pressure source to enter the gas flow channel. With this, the length of the pneumatic ratchet wrench can be flexibly changed.

Description

Pneumatic telescopic ratchet wrench

The invention relates to a pneumatic telescopic ratchet wrench, and in particular to a technical improvement of a telescopic pneumatic telescopic ratchet wrench.

According to the conventional pneumatic ratchet wrench, a pneumatic motor is used to provide the power for the driving member to swing back and forth relative to the driving head. The driving member then drives the ratchet device to swing back and forth. The ratchet device drives the rotating base to rotate in one direction, so that the rotating base can be driven. Rotation of internal assembly workpieces (such as screws and nuts).

The length dimension of the conventional pneumatic ratchet wrench is fixed. However, when using a power ratchet wrench, it is often necessary to replace the power ratchet wrench with a different length size due to limitations of the operating space, torque requirements, length of screws or bolts, working environment (such as obstacles), etc., resulting in user There are many pneumatic ratchet wrenches of different sizes available, but they have the disadvantages of high cost and inconvenience to carry.

Therefore, it is necessary to provide a novel and progressive pneumatic telescopic ratchet wrench to solve the above problems.

The main purpose of this creation is to provide a pneumatic telescopic ratchet wrench that can be flexibly telescoped to change the length.

In order to achieve the above purpose, the present invention also provides a pneumatic telescopic ratchet wrench, which includes: a telescopic unit, which includes a first pipe member and a second pipe member. The first pipe member and the second pipe member are movably combined with each other. The telescopic unit is provided with a gas flow channel; a driving mechanism, which is provided in the telescopic unit and communicates with the gas flow channel; the driving mechanism includes a driving head and a transmission unit, the transmission unit can drive the driving head; and a switch unit , which is provided in the telescopic unit to control the external air pressure source to enter the gas flow channel.

The following examples are only used to illustrate the possible implementation of this invention, but they are not intended to limit the scope of protection sought by this invention. The "one" or "at least one" before the nouns mentioned in the article do not limit the quantity. It can also be "plural" according to the requirements. This change in quantity is also the scope of the desired protection, which will be explained first.

Please refer to FIGS. 1 to 8 , which show a first preferred embodiment of the present invention. The pneumatic telescopic ratchet wrench 1 of the present invention includes a telescopic unit 10 , a driving mechanism 20 and a switch unit 30 .

The telescopic unit 10 includes a first pipe 11 and a second pipe 12. The first pipe 11 and the second pipe 12 are movably combined with each other. The telescopic unit 10 is provided with a gas flow channel 13; the driving mechanism 20 is provided with The telescopic unit 10 and connected to the gas flow channel 13 include a driving head 21 and a transmission unit 22. The transmission unit 22 can drive the driving head 21; the switch unit 30 is provided in the telescopic unit 10 to control the external air pressure. The source enters the gas flow channel 13.

Therefore, the first pipe 11 and the second pipe 12 can be flexibly telescoped to adjust the length size, and the external air pressure source can smoothly pass through the gas flow channel 13 to the driving head 21 at any length size.

The driving head 21 includes a head, a driving part, a rotating part and a plurality of ratchet parts. The driving part is swingably provided on the head and surrounds a hole, and the hole is surrounded by an inner ring tooth part. , the rotating member is provided in the hole, and the ratchet member is provided on the rotating member and is swingably meshed with the inner ring tooth portion.

In this embodiment, the first and second pipes 11 and 12 are respectively provided with a connected opening 14 inside. The opening 14 constitutes the gas flow channel 13 to achieve smooth gas flow with a simple structure. The driving mechanism 20 is provided with a channel 23 , which is connected with the gas flow channel 13 . The inner diameter of the channel 23 is smaller than the inner diameter of the gas flow channel 13 , thereby forming high-pressure gas to enter the driving mechanism 20 .

The telescopic unit 10 is further provided with at least one air-tight ring 60 , each of the air-tight rings 60 is placed between the first pipe member 11 and the second pipe member 12 to block the passage of gas. In this embodiment, the telescopic unit 10 is further provided with a plurality of air-tight rings 60 to prevent gas from leaking out of the gas flow channel 13 . Preferably, the second pipe member 12 is provided with an annular groove 121 on its outer circumference, and the airtight ring 60 is detachably clamped in the annular groove 121 and radially protrudes to press against the inner peripheral wall of the first pipe member 11; In this embodiment, the second pipe member 12 is provided with a plurality of annular grooves 121 on its outer circumference. The plurality of airtight rings 60 are detachably clamped in the plurality of annular grooves 121 and radially protrude against the first ring grooves 121 . The inner peripheral wall of the pipe 11 can replace the air-tight ring 60 and limit the positioning of the air-tight ring 60 in the ring groove 121 .

The pneumatic telescopic ratchet wrench 1 further includes a positioning mechanism 70. The positioning mechanism 70 includes a sleeve 71 and a locking member 72. The first pipe member 11 is sleeved on the second pipe member 12. The sleeve 71 is movably sleeved on the The first pipe member 11 is provided with a through hole 111, and the blocking member 72 is accommodated in the through hole 111. The outer circumferential surface of the second pipe member 12 is provided with a groove 122, and the blocking member 72 can be slidably disposed. in the groove 122. In this embodiment, the first pipe member 11 and the second pipe member 12 can relatively expand and contract along an axial direction A. The groove 122 includes a first groove 123 and a second groove 124. The first groove 123 and a second groove 124. 123 extends along the axial direction A. The second groove 124 is transverse to the first groove 123 and extends along a circumferential direction B. The circumferential direction B extends around the axial direction A. The blocking member 72 can optionally extend along the axial direction A. The first groove 123 and the second groove 124 move. In this embodiment, the groove 122 includes a plurality of first grooves 123 and a plurality of second grooves 124. The plurality of first grooves 123 communicates with the plurality of second grooves 124. Along the edges of the plurality of first grooves 123 The circumferential direction B is arranged at intervals, and the plurality of second grooves 124 are arranged at intervals along the axial direction A. Thereby, the first pipe member 11 and the second pipe member 12 can stably telescope and rotate relative to each other to adjust to a required length and rotate to a required angle for convenient use.

The second pipe member 12 further includes a positioning recess 125 on its outer periphery. The positioning recess 125 is connected to the groove 122 . The blocking member 72 can be resisted by the sleeve 71 and controllably at least partially engage the positioning recess 125 .

Preferably, the positioning mechanism 70 further includes an elastic member 73 that is elastically abutted between the first pipe member 11 and the sleeve 71 . In this embodiment, the outer periphery of the second pipe member 12 further includes a plurality of positioning recesses 125 , which are connected to the plurality of grooves 122 , and the blocking member 72 can be abutted by the sleeve 71 to controllably at least partially Snap into one of the positioning recesses 125; preferably, the depth of the positioning recess 125 is greater than the depth of the groove 122. Accordingly, a large portion of the blocking member 72 engages in the positioning recess 125 to be stably positioned, and can stably slide in the groove 122 after being disengaged from the positioning recess 125 .

Specifically, when the set 71 is in a locked position, the set 71 abuts the blocking member 72 so that the blocking member 72 cannot escape from the positioning recess 125, as shown in Figures 4 and 6; In an unlocked position, the blocking member 72 can escape from the positioning recess 125 and can slide smoothly in each groove 122, as shown in FIG. 5 .

Each positioning recess 125 is provided at the intersection of a first groove 123 and a second groove 124 to facilitate the selection of relative rotation and telescopic adjustment of the first pipe member 11 and the second pipe member 12 .

Please refer to FIG. 9 , which shows a second preferred embodiment of the invention. The telescopic unit 10 includes a bellows 40 , which is disposed in the opening 14 and forms the gas flow channel 13 . The pneumatic telescopic ratchet wrench 1 further includes an air inlet unit 50. The air inlet unit 50 is provided in the telescopic unit 10. The switch unit 30 is provided in the air inlet unit 50. One end of the bellows tube 40 is connected (screwed) to the air inlet unit 50. The other end of the driving mechanism 20 is connected (screw-connected) to the air intake unit 50 . In this way, the bellows tube 40 can be stably assembled in the driving mechanism 20 and the air intake unit 50, and when the first pipe member 11 and the second pipe member 12 expand and contract, the bellows tube 40 can also deform and expand smoothly. . In addition, the bellows 40 can be used to concentrate the external air pressure source to provide high-pressure air into the driving mechanism 20 .

Please refer to Figures 10 to 11, which show a third preferred embodiment of the present invention. The pneumatic telescopic ratchet wrench 1' also includes a piston unit 80. The piston unit 80 and the second pipe 12 are sleeved with each other. The piston The unit 80 is provided with a channel 81 connected to the gas flow channel 13. The piston unit 80 is provided with at least one air-tight ring 60. The at least one air-tight ring 60 rings against the first pipe 11 to block the passage of gas. The piston unit 80 and the second pipe member 12 are interlockingly connected (eg, tightly coupled or locked with each other). The external air pressure source can pass through the channel 81 and the gas flow channel 13 . The piston unit 80 prevents the gas in the gas flow channel 13 from leaking out, and the air tightness effect is good.

1, 1’: Pneumatic telescopic ratchet wrench 10:Telescopic unit 11:The first pipe fitting 111:Perforation 12:Second pipe fitting 121: Ring groove 122:Gutter 123:The first groove 124:Second groove 125: Positioning recess 13:Gas flow channel 14:Opening 20:Driving mechanism 21:Drive head 22: Transmission unit 23:Channel 30:Switch unit 40: Belly tube 50:Air intake unit 60: Airtight ring 70: Positioning mechanism 71:Kit 72: Card arrival 73: Elastic parts 80:Piston unit 81:Channel A:Axis B: circumferential direction

Figure 1 is a perspective view of a first preferred embodiment of this invention. Figure 2 is an exploded view of a first preferred embodiment of this invention. Figure 3 is a cross-sectional view of a first preferred embodiment of this invention. Figure 4 is a partial enlarged view of Figure 3. Figures 5 and 6 are usage status diagrams of a first preferred embodiment of this invention. Figure 7 is another cross-sectional view of a first preferred embodiment of the present invention. Figure 8 is a perspective view of a second pipe member of a first preferred embodiment of this invention. Figure 9 is a cross-sectional view of a second preferred embodiment of this invention. Figure 10 is a cross-sectional view of a third preferred embodiment of the present invention. Figure 11 is an exploded perspective view of the second pipe member and the piston of the third preferred embodiment of the present invention.

1: Pneumatic telescopic ratchet wrench

10:Telescopic unit

11:The first pipe fitting

12:Second pipe fitting

20:Driving mechanism

21:Drive head

30:Switch unit

70: Positioning mechanism

Claims (10)

A pneumatic telescopic ratchet wrench, including: A telescopic unit includes a first pipe and a second pipe. The first pipe and the second pipe are movably combined with each other. The telescopic unit is provided with a gas flow channel; A driving mechanism, located in the telescopic unit and connected to the gas flow channel, includes a driving head and a transmission unit, the transmission unit can drive the driving head; and A switch unit is provided on the telescopic unit to control the entry of an external air pressure source into the gas flow channel. The pneumatic telescopic ratchet wrench according to claim 1, wherein the first and second pipe members are each provided with a communicating opening inside, and the opening constitutes the gas flow channel. The pneumatic telescopic ratchet wrench according to claim 1, wherein the first and second pipe members are respectively provided with a connected opening inside, the telescopic unit includes a bellows tube, and the bellows tube is arranged in the opening, and This gas flow channel is formed. The pneumatic telescopic ratchet wrench according to claim 3 further includes an air inlet unit, the air inlet unit is provided on the telescopic unit, the switch unit is provided on the air inlet unit, one end of the bellows tube is connected to the driving mechanism, and the other end of the bellows tube is connected to the driving mechanism. One end is connected to the air intake unit. The pneumatic telescopic ratchet wrench according to claim 1, wherein the telescopic unit is further provided with at least one air-tight ring, and each of the air-tight rings is pressed between the first pipe member and the second pipe member to block the passage of gas. The pneumatic telescopic ratchet wrench according to claim 1 further includes a piston unit, the piston unit and the second pipe fitting are sleeved with each other, the piston unit is provided with a channel, the channel is connected to the gas flow channel, the piston unit is provided with At least one airtight ring is pressed against the first pipe to block the passage of gas. The pneumatic telescopic ratchet wrench according to claim 1 further includes a positioning mechanism, the positioning mechanism includes a set and a locking piece, the first pipe fitting is sleeved on the second pipe fitting, and the sleeve is movably sleeved on the The first pipe member is provided with a through hole, and the engaging member is accommodated in the through hole. The outer circumferential surface of the second pipe member is provided with a groove, and the engaging member can be slidably disposed in the groove. The pneumatic telescopic ratchet wrench according to claim 7, wherein the first pipe member and the second pipe member can relatively expand and contract along an axial direction, and the groove includes a first groove and a second groove, and the first groove The groove extends along the axial direction, the second groove is transverse to the first groove and extends along a circumferential direction, the circumferential direction extends around the axial direction, and the blocking member can selectively extend along the first groove and the second groove. The groove moves. The pneumatic telescopic ratchet wrench according to claim 7, wherein the outer periphery of the second pipe member further includes a positioning recess, the positioning recess is connected to the groove, and the blocking member can be abutted by the set to controllably at least partially block. into the positioning recess. The pneumatic telescopic ratchet wrench according to claim 8, wherein the telescopic unit is further provided with a plurality of air-tight rings, and each of the air-tight rings is pressed between the first pipe fitting and the second pipe fitting to block the passage of gas; The outer circumference of the second pipe is provided with a plurality of annular grooves, and the plurality of airtight rings are detachably clamped in the plurality of annular grooves and radially protrude against the inner peripheral wall of the first pipe; the grooves include a plurality of the third annular grooves. a plurality of grooves and a plurality of second grooves, the plurality of first grooves connecting the plurality of second grooves, the plurality of first grooves arranged at intervals along the circumferential direction, and the plurality of second grooves arranged at intervals along the axial direction; The outer periphery of the second pipe member further includes a plurality of positioning recesses, the plurality of positioning recesses are connected to the plurality of grooves, and the blocking member can be resisted by the set and controllably at least partially snap into one of the positioning recesses; the recess of the positioning recess The depth is greater than the recess depth of the groove; each positioning recess is provided at the intersection of a first groove and a second groove; the positioning mechanism further includes an elastic member that springs against the first Between the pipe fitting and the sleeve, the driving mechanism is provided with a channel that is connected to the gas flow channel, and the inner diameter of the channel is smaller than the inner diameter of the gas flow channel.

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