TWI739522B - Nail depth adjusting device of pneumatic nail hammer - Google Patents

Abstract

The invention provides a device for adjusting the driving depth of a pneumatic nail hammer. The device includes a body provided with an assembly groove. A position control block is movably arranged in the assembly groove. A stepped part of unequal height, the body is pivoted with a tube seat, and a telescopic tube is slid in the tube seat, one end of the telescopic tube protrudes out of the tube seat, between the telescopic tube and the position control block It is equipped with an elastic element, wherein the cylinder seat is provided with a positioning column corresponding to the stepped part; thereby, the problem of jamming of the traditional position control block is improved.

Description

Nail depth adjusting device of pneumatic nail hammer

The invention relates to the structural configuration of a pneumatic nail hammer, and particularly relates to a nail hammer depth adjusting device of the pneumatic nail hammer.

The pneumatic nail hammer is a pneumatic hand-held nailing tool. The difference between the pneumatic nail hammer and the pneumatic nail gun is that the pneumatic nail hammer omits the nail row in the structure, and instead inserts a single nail body at a time. Multiple short-distance hammer shocks are used to drive a single nail into the workpiece.

It is also known that the bottom end of the main body of the pneumatic hammer has an extension sleeve, the bottom end of the extension sleeve is provided with a telescopic tube, and an elastic element is arranged between the top of the telescopic tube and the body, so that the telescopic tube is in a normal state of elastic extension; When the hammer shaft of the pneumatic hammer hammers the nail body into the workpiece, it will cause the telescopic tube to retract into the extension sleeve.

When the traditional pneumatic hammer hammers the nail body into the workpiece, the nail head of the nail body is embossed, flat or concave (that is, the nail depth), which must be controlled by the feeling of the human hand. Therefore, the operator It is necessary to have considerable experience in operation and use to achieve a higher control success rate. For novices, it is easy to control the nail head of the nail body to be embossed, flat or recessed due to lack of experience (ie Nail depth).

In order to solve this problem, the industry developed a hand-held nail gun nailing depth adjustment device as disclosed in the Taiwan Announcement No. M390848 Patent. By rotating the barrel base, the position control block is driven to move synchronously, changing the position control block and retracting. The distance between the pipes can be used to control the retractable stroke of the telescopic pipe, thereby achieving the purpose of controlling the nailing depth.

However, in the aforementioned Taiwan Announcement No. M390848 Patent, the position control block is screwed into the barrel seat. When the position control block moves to the top dead center or the bottom dead center, the position control block is very It is easy to get stuck and cause the bit control block to be unable to move. Therefore, it needs to be improved.

The purpose of the present invention is to improve the problem that the traditional bit control block is prone to jam.

To this end, the present invention provides a driving depth adjustment device of a pneumatic nail hammer, comprising: a body, an assembly groove is provided along a driving axis of the pneumatic nail hammer; a position control block movable along the driving axis Disposed in the assembling groove, a ring surface of the positioning block has a plurality of stepped portions of unequal heights at intervals along the nail axis in the same circumferential direction; a cylinder seat is pivoted along the nail axis On the main body, the barrel base has a set of connecting ends and a control end, the set of connecting ends is implanted in the assembly groove, and the control end is exposed outside the body; a telescopic tube that slides along the nail axis Set in the barrel seat, one end of the telescopic tube protrudes out of the barrel seat, and an elastic element is arranged between the telescopic tube and the position control block; wherein, the barrel seat is provided with a plurality of steps corresponding to the plurality of steps The positioning post of the step part is formed with a positioning groove for restraining the positioning post, and the positioning post receives the restraint of the positioning groove and is positioned on the step part.

In a further implementation, each of the plurality of stepped portions respectively includes a first stepped portion, a second stepped portion, and a third stepped portion, the height of the first stepped portion is smaller than the second stepped portion, and the second stepped portion The height of the part is smaller than the third step part.

In a further implementation, the stepped portion is located on the annular surface of the position control block in the order of the first stepped portion, the second stepped portion, and the third stepped portion. Between the second stepped portion, and between the second stepped portion and the third stepped portion are respectively connected via an inclined surface, and between the third stepped portion and the other first stepped portion via a The vertical planes are connected.

In a further implementation, the stepped portion is located on the control block in the order of the heights of the first stepped portion, the second stepped portion, and the third stepped portion from low to high, and then from high to low Between the first stepped portion and the second stepped portion, and between the second stepped portion and the third stepped portion, are respectively connected via an inclined surface.

In a further implementation, the bottom of the assembling groove is along the driving axis At least one guide hole is formed, and the position control block is correspondingly formed with a guide portion equal to the guide hole. The position control block receives the guide of the guide hole through the guide portion and moves along the The driving nail moves axially.

In a further implementation, a ring protrusion is formed on the outer wall of the barrel seat, the ring protrusion is located between the assembly end and the control end, the body is provided with a ring groove, and the barrel seat passes through the ring protrusion And it is pivoted on the body. The assembling groove is provided with a bottom cover, the ring groove is formed between the bottom cover and the main body, and the barrel seat receives the restraint of the ring groove via the ring convex portion and is pivoted on the main body.

In a further implementation, the positioning column is formed by extending the barrel seat.

In a further implementation, one end of the telescopic tube is formed with a ring flange, the control end of the barrel seat is radially threaded with two fixing pins, and the telescopic tube receives the restraint of the fixing pin via the ring flange and is limited to the Inside the tube seat.

In a further implementation, the elastic element is a compression spring.

Based on the above, the technical effect of the present invention is that the positioning post drives the displacement of the control block, which can effectively prevent the control block from getting stuck compared to the traditional way of screwing to drive the displacement of the control block. And through the design of the positioning groove as a means of fixing the nailing depth, the structural complexity of the device can be simplified and the processing and manufacturing can be facilitated.

The features and technical effects of the various embodiments disclosed herein will be presented in the following description and illustrations.

10: body

101: nail axis

11: Master

12: Inlet end

13: Hammering end

14: Assembly slot

141: Piercing

142: Guide hole

15: Hammer shaft

16: bottom cover

161: Through hole

162: Ring groove

20: Control block

21: Step

211, 211’: The first step

212.212’: The second step

213: Third Step

22: Guidance Department

23: Through hole

24: Bevel

25: vertical plane

26: positioning slot

30: tube seat

31: Assembling end

32: Control terminal

33: Ring convex

34: Through hole

35: pin hole

36: positioning column

37: fixed pin

40: Telescopic tube

41: inner end

411: Ring flange

42: Outer end

50: elastic element

L1, L2, L3: Retracting stroke

Fig. 1 is a three-dimensional exploded view of the nailing depth adjusting device of the pneumatic nail hammer of the present invention.

FIG. 2 is a three-dimensional schematic diagram of the main body in FIG. 1 from another perspective.

Fig. 3 is an enlarged schematic diagram of the bit control block in Fig. 1.

Fig. 4 is a cross-sectional view of Fig. 1 after being combined.

Fig. 5 is a partial perspective cross-sectional view of Fig. 4.

Fig. 6 and Fig. 7 are schematic diagrams of different embodiments of the stepped portion, respectively.

Fig. 8 is an enlarged schematic diagram of the positioning column in Fig. 4 when it moves to the first step part.

Fig. 9 is a cross-sectional view taken along the line A-A in Fig. 8.

Fig. 10 is an enlarged schematic diagram of the positioning column in Fig. 4 when it moves to a second step part.

Fig. 11 is a cross-sectional view taken along the line B-B in Fig. 10.

Fig. 12 is an enlarged schematic diagram of the positioning column in Fig. 4 when it moves to a third step part.

Fig. 13 is a cross-sectional view taken along the line C-C in Fig. 12.

Please refer to Figure 1, Figure 4 and Figure 5, revealing the configuration details of a preferred embodiment of the present invention, illustrating the pneumatic nail hammer nail depth adjustment device of the present invention, including a body 10, a position control block 20, a The barrel base 30 and a telescopic duct 40, in which:

The body 10 includes a grip 11 for the operator to hold, an air inlet 12 for introducing high-pressure air, and a hammering end 13 for hammering the nail body; the hammering end 13 runs along the pneumatic nail A hammer shaft 101 is provided with an assembling groove 14 with a through hole 141 at the bottom of the assembling groove 14, a hammer shaft 15 is movably arranged in the body 10, and the hammer shaft 15 protrudes out of the body 10 through the hole 141, and The hammer shaft 15 can be moved back and forth through the drive of high-pressure air.

Please refer to Figure 1, Figure 3, Figure 4 and Figure 5 together to illustrate that the position control block 20 is movably arranged in the assembly groove 14 of the hammer end 13 along the nail axis 101, and a ring surface of the position control block 20 A plurality of steps 21 of unequal height are formed. Each of the plurality of stepped portions 21 includes a first stepped portion 211, a second stepped portion 212, and a third stepped portion 213, wherein the height of the first stepped portion 211 is smaller than the second stepped portion 212, and the second stepped portion 212 The height of the portion 212 is smaller than the third step portion 213, that is, the height of the first step portion 211<the height of the second step portion 212<the height of the third step portion 213. In addition, the position control block 20 is formed with a through hole 23 through which the hammer shaft 15 can pass.

1 and 4 together, it is illustrated that the barrel base 30 is pivoted to the hammering end 13 along the nail axis 101. The barrel base 30 includes a set of connecting ends 31 and a control end 32, wherein the set of connecting ends 31 is implanted in the assembling groove 14, the control end 32 is exposed outside the body 10 to facilitate manual rotation control, the barrel base 30 is formed with a through hole 34, the two ends of the through hole 34 respectively extend to the assembly End 31 and control end 32; further, the outer wall of the barrel base 30 is formed with a ring convex portion 33, the ring convex portion 33 Located between the assembling end 31 and the control end 32, a bottom cover 16 is assembled on the assembling groove 14 of the hammering end 13, a ring groove 162 is formed between the bottom cover 16 and the main body 10, and the barrel seat 30 The ring protrusion 33 receives the restraint of the ring groove 162 and is pivoted to the hammering end 13; the bottom cover 16 has a through hole 161, and the control end 32 is exposed outside the main body 10 through the through hole 161.

In specific implementation, the cylinder base 30 is provided with a positioning post 36 corresponding to the step portion 21 of the position control block 20. The positioning post 36 is positioned on the step portion 21 of the position control block 20, and the position control block 20 passes through The positioning column 36 is driven and displaced. The positioning column 36 may be formed by extending the cylindrical wall of the cylindrical seat 30 along its radial direction. Furthermore, a positioning groove 26 is formed on the step portion 21. When the positioning post 36 moves to the step portion 21, the positioning post 36 can be positioned on the step portion 21 by the restraint of the positioning groove 26.

Please refer to FIG. 1, FIG. 2 and FIG. 4 together to illustrate that the bottom of the assembling groove 14 is formed with at least one guide hole 142 along the nailing axis 101, and the position control block 20 is correspondingly formed with an equal number of the guide hole 142 The guide portion 22, the position control block 20 receives the guidance of the guide hole 142 through the guide portion 22 and moves along the nail axis 101, which can effectively prevent the position control block 20 from rotating during the process of being driven by the positioning post 36.

Please refer to Figure 1, Figure 4 and Figure 5 together to illustrate that the telescopic tube 40 has an inner end 41 and an outer end 42. The inner end 41 of the telescopic tube 40 is slidably disposed on the barrel base 30 along the nailing axis 101. In the through hole 34, the outer end 42 of the telescopic tube 40 protrudes to the outside of the barrel base 30. Furthermore, the inner end 41 of the telescopic tube 40 is formed with a ring flange 411, and the control end 32 of the cylinder base 30 is radially penetrated with two fixing pins 37, and the two fixing pins 37 penetrate through the cylinder base 30. The pin holes 35 on both sides of the control end 32 allow the telescopic tube 40 to receive the restraint of the fixing pin 37 via the ring flange 411 and be confined in the barrel base 30, so that the telescopic tube 40 will not be separated from the barrel base 30. An elastic element 50 is arranged between the inner end 41 of the telescopic tube 40 and the position control block 20. The elastic element 50 is implemented as a compression spring, so as to elastically hold the telescopic tube 40 outward, so that the outer end of the telescopic tube 40 42 is in the most convex state.

Please refer to FIG. 6, which illustrates that the stepped portion 21 can be implemented according to Arranged in the order of the first step portion 211, the second step portion 212, and the third step portion 213, and between the first step portion 211 and the second step portion 212, and between the second step portion 212 and the third step portion 213 Are respectively connected by an inclined surface 24, and guided by the inclined surface 24, the positioning column 36 can move to the adjacent step portion 21; the third step portion 213 and the other first step portion 211' pass through A vertical surface 25 is connected. Since the positioning column 36 is stopped by the vertical surface 25 when it moves, the positioning column 36 can be moved by the third step part 213 when the operator rotates the cylinder base 30 to drive the positioning column 36 to move. To the first step portion 211', it cannot be moved from the first step portion 211' to the third step portion 213, that is, the barrel base 30 can only rotate in one direction.

Referring to FIG. 7, it is illustrated that the stepped portion 21 can be arranged in order from low to high, and then from high to low according to the height of the first step 211, the second step 212, and the third step 213. That is, they are arranged in the order of the first step portion 211, the second step portion 212, the third step portion 213, the second step portion 212', and the first step portion 211', and the first step portion 211 and the second step portion 212 Between the second step portion 212 and the third step portion 213, between the third step portion 213 and the second step portion 212', and between the second step portion 212' and the first step portion 211' respectively The inclined surfaces 24 are connected, and the inclined surfaces 24 are provided between the adjacent steps 21, so that when the operator rotates the cylinder base 30 to drive the positioning column 36 to move, the cylinder base 30 can perform bidirectional rotation.

Please refer to FIGS. 8 to 13 in order to illustrate that by rotating the barrel base 30 by the operator, the positioning column 36 is moved to a different step portion 21 on the position control block 20, and then the position between the position control block 20 and the telescopic conduit 40 is adjusted. The distance (that is, the retracting stroke of the telescopic tube 40), for example: when the positioning column 36 moves to the first step portion 211, the retracting stroke of the telescopic tube 40 is L1 (as shown in FIGS. 8 and 9); When the positioning column 36 moves to the second step portion 212, the retracting stroke of the telescopic tube 40 is L2 (as shown in FIGS. 10 and 11); when the positioning column 36 moves to the third step portion 213, the telescopic tube 40 The retraction stroke of the telescopic tube is L3 (as shown in Figures 12 and 13); since the height of the first step portion 211<the height of the second step portion 212<the height of the third step portion 213, the retractable tube 40 is retracted Stroke L1>L2>L3, that is, when the positioning column 36 moves The nailing depth when reaching the first step portion 211>the nailing depth when the positioning pillar 36 moves to the second step portion 212>the nailing depth when the positioning pillar 36 moves to the third step portion 213, whereby The nail head of the control nail body is embossed, flat or concave.

The above embodiments only express the preferred embodiments of the present invention, but they should not be understood as a limitation on the scope of the patent application of the present invention. Therefore, the present invention should be subject to the content of the claims defined in the scope of the patent application.

10: body

11: Master

12: Inlet end

13: Hammering end

14: Assembly slot

15: Hammer shaft

16: bottom cover

20: Control block

21: Step

22: Guidance Department

23: Through hole

26: positioning slot

30: tube seat

31: Assembling end

32: Control terminal

33: Ring convex

34: Through hole

35: pin hole

36: positioning column

37: fixed pin

40: Telescopic tube

41: inner end

411: Ring flange

42: Outer end

50: elastic element

Claims (8)

A device for adjusting the driving depth of a pneumatic nail hammer includes: a body, an assembly groove is provided along a nail driving axis of the pneumatic nail hammer, and at least one guide hole is formed at the bottom of the assembly groove along the nail driving axis; A position control block is formed with at least one guide portion that is guided by the guide hole, so that the position control block is movably arranged in the assembly groove along the nailing axis, and an annular surface of the position control block A plurality of stepped portions of unequal height are formed at intervals along the axial direction of the nail in the equal circumferential direction, and the plurality of stepped portions are connected by a plurality of inclined surfaces; a cylinder seat pivots along the axial direction of the nail Set on the main body, the barrel base has a set of connecting ends and a control end, the set of connecting ends is implanted in the assembly groove, and the control end is exposed outside the body; a telescopic tube along the nailing axis It is slidably arranged in the barrel seat, one end of the telescopic tube protrudes out of the barrel seat, and an elastic element is arranged between the telescopic tube and the position control block, and the elastic element pushes the position control block along the driving nail Axially accepts the guiding of the guide hole; wherein the cylinder seat is provided with a plurality of positioning posts corresponding to the plurality of stepped portions, and the positioning posts are respectively formed by extending the cylindrical wall of the cylinder seat in the radial direction, so A positioning groove for restraining the positioning post is formed on the stepped portion, and the positioning post receives the restraint of the positioning groove and is positioned on the stepped portion of the positioning block. The device for adjusting the driving depth of a pneumatic nail hammer according to claim 1, wherein each of the plurality of stepped portions respectively includes a first stepped portion, a second stepped portion, and a third stepped portion, and the height of the first stepped portion It is smaller than the second step portion, and the height of the second step portion is smaller than the third step portion. The device for adjusting the driving depth of a pneumatic nail hammer according to claim 2, wherein the stepped portion is located in the control position in the order of the first stepped portion, the second stepped portion, and the third stepped portion The torus of the block, the first stepped portion and The second stepped portion, and the second stepped portion and the third stepped portion are respectively connected via the inclined surface, and a vertical surface is also included between the plurality of stepped portions, and the first The three stepped portions are connected to the other first stepped portion via the vertical surface. The device for adjusting the driving depth of a pneumatic nail hammer according to claim 2, wherein the stepped portion is in a descending order according to the height of the first stepped portion, the second stepped portion, and the third stepped portion, Then they are located on the annular surface of the position control block in descending order, between the first stepped portion and the second stepped portion, and between the second stepped portion and the third stepped portion, respectively Connected via the inclined plane. The device for adjusting the driving depth of a pneumatic nail hammer according to claim 1, wherein a ring protrusion is formed on the outer wall of the barrel seat, and the ring protrusion is located between the assembly end and the control end, and the assembly groove A bottom cover is provided, a ring groove is formed between the bottom cover and the main body, and the cylinder seat is pivoted on the main body by receiving the restraint of the ring groove through the ring convex portion. The device for adjusting the driving depth of a pneumatic nail hammer according to claim 1, wherein the positioning column is formed by extending the barrel seat. The device for adjusting the driving depth of a pneumatic nail hammer according to claim 1, wherein one end of the telescopic tube is formed with a ring flange, the control end of the barrel seat is radially threaded with two fixing pins, and the telescopic tube passes through the ring The flange receives the restraint of the fixing pin and is confined in the barrel seat. The device for adjusting the driving depth of a pneumatic nail hammer according to claim 1, wherein the elastic element is a compression spring.

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