JP2001347469A - Hand power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand pneumatic tool. SOLUTION: This tool 1 has an accommodating part 155 forwardly extended from a front end part of a main body 3, the accommodating part has a first section 157 at the front end part of the main body, and a second section 169 forwardly extended from the first section, and the second section is shifted to one side of the first section. An output shaft 187 is loaded on the second section, a check for driving the output shaft in two directions and a ratchet mechanism are loaded in the second section, and a mechanism for transversely transmitting the driving to the check and the ratchet mechanism is loaded in the first section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates generally to hand-held power tools, and more particularly to hand-held pneumatic tools, and more particularly to a hand-held pneumatic tool with a two-way drive for an output shaft and a shaft.

[0002]

BACKGROUND OF THE INVENTION The present invention relates in particular to a tool of the kind for forming a tool such as a power wrench and for applying a socket for rotating bolts and nuts to an output shaft, but for components other than the socket, for example bolts. It should be understood that components for rotating fastening elements (eg, screws) other than nuts and nuts also apply to the output shaft. The present invention provides in some respects a bi-directional drive for the output shaft described in U.S. Pat. No. 5,535,646, issued Jul. 16, 1996, titled "Ratchet Drive." The above patents are hereafter referred to as the '646 patent and are incorporated herein by reference.

[0003]

While the tools described in the '646 patent are generally quite satisfactory, they are not suitable for use as a power wrench with a socket on the output shaft to rotate a bolt or nut. Due to the structure around the bolt or nut, sometimes the tool axis cannot be held perpendicular (or nearly perpendicular) to the axis of the bolt or nut, so the socket is correctly positioned on the head or nut of the bolt Can not do it,
The problem may occur.

[0004] Among the several objects of the present invention, the main ones are the following: When using a socket as a power wrench, place the socket on the bolt head and nut in various situations that may be encountered. Providing a hand-held power tool, capable of holding the tool in a suitable position for providing a pneumatic tool with such a capability; an output shaft for receiving a socket or other attachment;
Provision of a tool having a directional drive.

[0005]

SUMMARY OF THE INVENTION Generally, a hand-held power tool of the present invention includes an elongated body sized and shaped to be held by a hand, the body having a front end when held in a hand. A body having a motor chamber within the vicinity of its front end and a motor within the chamber. The storage section extends forward from the front end of the main body on the extension of the main body,
The storage section has a first section on the front end side of the main body, and a second section having a relatively elongated shape extending forward from the first section, wherein the second section has a smaller cross section than the first section. , Are shifted in one direction of the first section. An output shaft mounted in the second section near the forward end of the second section for rotation in one direction or the opposite direction about a transverse axis,
It has an outer end protruding from said second section for attaching an attachment for rotating the fastening element. The motor has a drive shaft that rotates about an axis of a body that extends from the motor chamber into the first section. The mechanism of the second section can drive the output shaft in one direction or the opposite direction, and the mechanism of the first section driven by the drive shaft drives the mechanism of the second section. The drive is transmitted laterally to the output shaft. Other objects and features are in part obvious and in part pointed out below. In the drawings, the same reference numerals indicate the same parts throughout the drawings.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 15, a first embodiment of a hand-held pneumatic tool, generally designated by the reference numeral 1, is a general-purpose pneumatic tool having a size and shape to be held by hand. It can be seen that it includes an elongated body 3 which has a forward end 5 and a rearward end 7 when held in a hand, and a longitudinally extending axis A. The body 3, which is substantially circular in cross section, has a motor chamber 9 and an air motor M near its front end 5, the motor M having a rotor 11 rotating about an axis A of said chamber. A drive shaft driven by a rotor 11 extending forward from the motor chamber is shown at 13. The body 3 has a compressed air inlet 15 for rotating the rotor 11 (in one direction), said inlet being at the rear end of the body, and in the longitudinal direction relative to the body, more specifically the shaft. A comprises a passage extending along A. The air hose connector 17 rotates around an axis extending substantially in the longitudinal direction with respect to the main body, more specifically, an axis A (coaxial with the intake passage 15), while being in close contact with the main body 3. The hose connector 17 has a tubular shape and has a hole 19 for flowing compressed air into the intake passage 15. As used herein, the term "hole" means not only a hole formed by hollowing out, but also a hole formed by any other method. The connector 17 supplies compressed air from its supply to the hole 19 and the body 3 is connected to the hose and the connector.
Air hose (not shown) so that it can rotate
Connect.

The main body 3 has an air feed passage indicated at 21 for flowing compressed air from the intake passage 15 to the motor M so that the motor M is driven, and the feed passage controls the flow therethrough. Has a valve 23 therein. In order to operate the valve 23, the main body 3 is connected to the member 2 in contact with the valve.
5. More specifically, it has a lever, which can be operated by the hand of the user holding the device 1. The body has an exhaust passage therein indicated at 27 at the rear end 7 of the housing for exhausting from the motor chamber 9 extending from the chamber to an outlet 29. An air deflector for exhausting air present at an exhaust outlet 29 that can rotate around a hose connector 17 to redirect exhaust radially outward and in a direction selected by a user grasping the device 1 Is indicated at 31 and can be adjusted over 360 °.

More specifically, body 3 comprises a generally cylindrical tubular metal member 33 having a cover 35 made of rubber or the like. The member 33 has a rear part,
It has an integrated cross-block 37, said cross-block being composed of two openings, each indicated by 39 (see especially FIG. 7). The member 33 has a cylindrical recess, generally designated 43, in front of the cross-block, the recess having a slightly enlarged front end 45 at the front end 5 of the member (see FIG. 5). reference). The rear trunnion 5 of the rotor 11 fits into the recess 43 and is in contact with the front surface of the cross-block at the inner (rear) end.
1 is a cage 47 of a ball bearing 49. The rotor 11 has conventional blades or vanes 53 (known in the art) on which it is bombarded with pressurized air supplied through the air feed passages 21 to spin them, and the blades or vanes are It rotates in the motor cylinder 55 that is housed in the recess 43. At the front end of the motor cylinder is a cage 57 for a ball bearing 59 (FIG. 5) for the shaft 13 which constitutes the front trunnion of the rotor 11. The ball bearing cage 57 itself is held in place by an annular retainer 63 screwed into the forward end of the member 33. The annular beveled member or nose located at the front end is shown at 67.

The cross-block 37 has an opening generally indicated by 75 extending transversely of the member 33, said openings being successively smaller and smaller holes 76, 77, 79 and 8 respectively.
3 (especially see FIG. 10 in which the valve 23 is enlarged), holes 79, 77 and 76 are formed by a counterbore and holes 8
3 is on the side where the lever 25 of the member 33 is located, and the counterbore 76 is on the side opposite to the lever 25 of the member 33. A shoulder 81 at the inner end of the counterbore 77 constitutes a valve seat. The valve 23 includes a valve member 85 pressed by a coil compression spring 87 urged against a plug 88 mounted on a counter bore 76 by a seal 90 so as to be in close contact with the seal 86 on the seat. Motor M
The valve member 85 is shown in a released state in which the valve member 85 is separated from the seat 81 so that air can pass through.

The outlet port 93 extends forward from the hole 83 to the device into a passage 97 through the ball bearing cage 47, the passages 93 and 97 forming part of the passage 21. A valve stem slidable in a third hole 83 is shown at 99 that is engageable with a lever 25 that opens the valve 23 to allow air to flow, and air flows through the port intake 15 through the port 101. Through the counterbore 77, through the counterbore 79, and then through passageways 93 and 97 to the motor M (described below). The lever 25 is pivotally mounted at 103 on the upper body 33 and when pushed from the retracted state shown in FIGS.
Is released. The state where the lever 25 is retracted is determined by engaging the rear end of the lever with the main body 33.

The passage 97 in the ball bearing cage 47 leads to a notch 109 at the rear end of the motor cylinder 55. Notch 109 provides communication between passage 97 and the interior of motor cylinder 55. Channel 107 extends from notch 109, through motor cylinder 55, from its rear end to its front end, and is directed to notch 108 at the front end of the motor cylinder. Notch 108 provides communication between passage 97 to the interior of the motor cylinder and the forward end of the motor cylinder. Air passes from inside the motor cylinder 55 through a notch 111 at the front end of the motor cylinder to a passage 113 (the air flows rearward) between the motor cylinder and the wall of the member 33 surrounding the recess 43. And then through a notch 114 at the periphery of the ball bearing cage 47 to a passage 115 in the cage 47 extending along an arc surrounding the axis A, said passage being 115 flows exhaust to outlet 29.
Air also flows from inside the motor cylinder 55 through a notch 111a at the rear end of the motor cylinder,
Thereafter, the air is exhausted to the passage 115 through the notch 114a at the periphery of the ball bearing cage 47.

The intake passage 15 is located in a rearward extension 117 of the body 3 which is tubular with a hole defining said intake passage. The extension 117 consists of a tubular fitting which is tightly secured by an O-ring 119 in an opening 121 in a cross-block 37 extending substantially in the longitudinal direction of the device. Tubular mount 117 includes a small diameter front section 12.
3 is a rear section 12 having a large diameter of the mounting portion.
7 is secured within the opening 121 by screwing it to a point where the flange 125 at the front end of the opening 7 fits snugly around the rear end of the opening 121 member 33 and the O-ring 119. The tubular air hose connector 17 is brought into close contact with the tubular mounting portion 117 by using the O-ring 129, and rotates thereon. The connector has a ball stop 131 biased by a spring 133 to be received in the annular groove 135 of the mounting portion,
It is retained on the mounting at its forward end engaging the flange 125 of the mounting. With this arrangement, the connector can be rotated on the mounting portion. Behind the flange 137 of the connector 17, a hole in the connector is threaded to connect the air supply hose as shown at 139, and the perimeter behind the flange 137 of the connector is shown with a wrench. 4 can be hexagonal.

The cross-block 37 has a structure in which a space is provided in front of the rear end of the member 33, and a substantially cylindrical concave portion 141 is provided at the rear end of the member. The air deflector 31 comprises a tubular member having an annular wall 143 coaxial with the air hose connector 17 and surrounds the connector with an annular space 145 therebetween. Annular wall 1
Reference numeral 43 denotes a front end portion of the main body 3 which is adjacent to a rear end portion of the member 33 of the main body 3 and is rotationally tightly engaged with the rear end portion thereof. Thus, it is possible to rotate in the concave portion while keeping tight contact. The annular wall 143 has an inwardly directed flange 149 at its rear end and engages an annular flange 137 of the connector 17 to close the annular space 145. Exhaust is at outlet 29
Goes out to the annular space 145 in the deflector 31 from
The annular wall 143 of the deflector has an opening 151 for exhausting air from the space 145 in the lateral direction. The annular wall 143 is provided with ribs 153 on the outside to facilitate gripping it for rotation on the connector.

As described above, the main body 3 mainly includes the valve 2
Except for the small part 3 and the member, that is, the nose 67,
It is substantially the same as the main body of the hand-held air rotary drive (also having the same title of the invention) disclosed in the pending US patent application Ser. No. 09 / 490,896 filed by Osamu Izumizawa filed on Jan. 27, 2000, The application is incorporated herein by reference.

Referring to FIGS. 1-3, 5, 13 and 15, the body 3 has a housing, generally designated 155, which extends forwardly from the front end of the body over the extension of the body. ing. The storage section 155 has a first section 157 at the rear end thereof at the front end of the main body.
The section is formed by a rear end wall 159, side walls 161 and 163 of the storage section, a curved back wall 165 and a front wall 167, and the storage section has a relatively elongated shape extending forward from the first section 157. Second section 16
9. The second section 169 has a smaller cross section than the first section 157 and is offset in one direction of the first section. An annular flange 171 on the rear end wall of the storage section 155 is attached to the nose 67 on the main body 33. This flange is formed with a rearward facing shoulder 173 that engages the front end of the retainer 63. The elongated second section 169 of the receptacle is constituted by an elongated channel 175 extending from the first section 157 of the receptacle, the channel 175 having a flat web 177, side faces 179 and end walls 181. are doing. The open side of the channel 175 and the closing plate of the first storage section 157 are 183
, And are detachably fixed by screws 185. Thus, the second elongated storage section 1
69 is generally hollow with a substantially rectangular cross section, and has a closure plate 183 on one side thereof (which may be referred to as its front side).
And the web 177 is on the opposite or reverse side.
The output shaft 187 of the tool 1 is mounted in a second elongated section of the housing 155 and rotates in one or the opposite direction about an axis transverse to the housing near its forward end. The output shaft 187 has a gear 189 at its middle in the second section, which functions as a ratchet.
(Hereinafter referred to as ratchet). A shaft 187 is journalled at the rear end of the shaft behind the ratchet by a bearing 191 on a web 177 and a plate 183 on the front of the ratchet.
Circular structure 19 rotating in a circular opening 195 in
Three. Shaft 187 has an outer end portion 197 that is generally square in cross section, the outer end portion having a laterally drilled recess 199 that holds coil compression spring 201 therein, the spring comprising The ball stop 203 is urged to the position shown in FIG. 5 so that a part thereof protrudes from the recess, and an attachment (not shown) for rotating the fastening element, specifically, a bolt or nut for rotating Enables installation of snap-on sockets. Second storage section 175 operable to drive output shaft 187 in one direction or the other.
The mechanism within is shown in its entirety at 205 and the mechanism 20
The mechanism driven by the drive shaft 13 described above, which functions in the first storage section 157, is shown in its entirety at 207 to transfer the drive laterally to the output shaft driving the drive shaft 5.

As shown in FIG.
5 is substantially the same as that described in the aforementioned '646 patent (incorporated herein by reference) and is essentially a pawl carrier 209.
(The "drive link" 16 in the '646 patent) having a pair of pawls 211 and 213 pivotally mounted on the carrier at 215 and 217, respectively.
have. The pawl carrier 209 is pivotally mounted on a pivot pin 231 that extends laterally through the second storage section 169 near the rear end of the second storage section to vibrate within the second compartment. Pawls 211 and 213 have tails 221 and 223, respectively, extending generally rearward, and are biased by ends 225 and 227 of torsion spring 229 wrapping around pivot pin 231 and extend laterally of storage section 157. The tail engages a cam 233 on a camshaft 235 that extends from section 157 to a groove 237 in the front wall of section 157. The lever 239 on the rear end of the camshaft can swing between two points determined by stops 241 and 243, and the pawl 211 engages the ratchet 189 to rotate the output shaft 187 in one direction. The pawl 213 rotates the cam between a first position to engage and a second position where the pawl 213 engages the ratchet to rotate the output shaft in the opposite direction. Details of the above-described output shaft that causes mechanism 205 to function can be found in the above-mentioned '646 patent.

The mechanism 207 described above, which is driven by the drive shaft 13 for transmitting the drive laterally to the output shaft which drives the mechanism 205, comprises a storage section 157 in front of the shoulder 173 for rotation about axis A. Consists of a crank 245 which is bearing by a ball bearing 247 in a circular recess. The crank 245 driven by the drive shaft 13 has a crank pin 249 that can circulate around an axis A extending forward in the section 157. Link 251 is
It has an elongated slot 253 extending straight therethrough to receive the crank pin 249, extending from the pin to the pawl carrier 209, and the link is connected to the pawl carrier 209 near the rear end of the carrier to oscillate the carrier. 255. The link 251 generates vibration of the pawl carrier, so the link 251
In order to rotate the pawl carrier 209 with respect to said pawl, said connection is a rotary connection, said pawl having a partially circular opening 257 (see FIG. 13) at its rear end. This is accomplished by forming a carrier and by forming a link at an end portion having an arcuate side that is rotatably seated in opening 257. The opening 257 has a cross section slightly larger than a semicircle, and the end portion of the link is flat on the front side and the rear side as indicated by 261.

The drive for the crank 245 is a deceleration drive, and more specifically, a planetary gear drive 263 (FIG. 11) provided by configuring the crank as a planetary gear carrier that supports three planetary gears, each designated 265. The planetary gears are on the reverse side of the crankshaft and spaced 120 ° apart about axis A and mesh with a sun gear 267 formed at the forward end of drive shaft 13. The planetary gear meshes with the ring gear 269 inside the retainer 63. According to this arrangement, when the valve 23 is opened to send compressed air to the motor M, the drive shaft 13 is driven at a relatively high speed in a predetermined direction, and the planetary gears are driven at a reduced speed in a predetermined direction. The crank 245 is driven through the array. Crank pin 249 rotates in a circle surrounding axis A (which is the axis of the crank), creating a link oscillation across slot 253 in link 251 which in turn causes pivot pin 231 to rotate.
Generate vibration of the pawl carrier 209 on the axis. The range in which the link 251 moves is indicated by a dotted line in FIG. The vibration of the pawl carrier 209 causes rotation of the output shaft 187 in one direction or the other, depending on the setting of the lever 239.

As described above, the second section 169, such as the elongated tongue of the storage section 155, is offset in one direction of the first storage section 157, and is preferably
Are shifted toward the side (left side in FIG. 1) where the valve operating member or lever 25 is located. The outer end portion 197 of the output shaft 187 then projects from that same side of the second storage section, ie from the side where the closure plate 183 is located. Referring to FIG. 1, it can be seen that the second storage section is parallel to the axis A of the body and is on one side of said axis, specifically the side mentioned above. Closing plate 18
3 is the above-mentioned side of the main body 3 (the side on which the lever is located)
The end portion 197 of the output shaft 187 projects far beyond that plane. With this arrangement, the socket 27 is used as a power wrench.
Position for properly positioning the socket on the head or nut of the bolt in various situations, such as the situation shown in FIG. 15, where the tool must be held close to the flat surface S when using 1 It is possible to hold the tool 1 with.

FIGS. 16 and 17 show an improvement of the tool 1 indicated by 1A in order to distinguish it from the tool 1, in which the body 3 is identical to the tool 1 but contains a portion extending from the body to the front. The structure of the part is different from that of the tool 1. As described above, the storage section of the tool 1A, which is indicated by the reference numeral 155A as a whole to distinguish it from the storage section 155, includes a first section 157A having a slightly different shape from the section 157, and the first section section 157A. A second section 169A radially offset from the axis A of the body is angled outwardly from said axis. More specifically, the second section is angled away from the side of the body where the lever 25 is located. Generally, except that the second storage section is angled, the molds of FIGS. 16 and 17 correspond to the molds of FIGS. 1-15, and the same reference numerals are used to indicate corresponding parts. Types 16 and 17 differ in that the closing plate 183A is located on the side of the body facing the lever 25 and the outer end portion 197 of the output shaft 187 projects from the aforementioned side of the second section. , Different from the type of FIGS. In addition, link 251A and pawl carrier 209A are shaped to accommodate different sections 169A that are offset at different angles.

In view of the above, it can be seen that some objects of the invention have been achieved and other advantages have been obtained.
Since various changes can be made in the arrangement described above without departing from the scope of the invention, all matter contained in the above description and represented in the accompanying drawings should be interpreted as illustrative. And is not meant to be limiting.

[Brief description of the drawings]

FIG. 1 is a side view of the tool of the present invention.

FIG. 2 is a front view of the tool shown in FIG.

FIG. 3 is a rear view of the tool shown in FIG. 1;

FIG. 4 is a bottom view of the rear end seen from line 4-4 in FIG. 1;

FIG. 5 is a side cross-sectional view of the tool taken generally along line 5-5 of FIG. 3;

6 is an enlarged cross-sectional view taken along line 6-6 in FIG. 5;

FIG. 7 is an enlarged transverse cross-sectional view taken along line 7-7 of FIG. 5;

FIG. 8 is an enlarged transverse cross-sectional view taken along line 8-8 of FIG. 5;

FIG. 9 is an enlarged transverse cross-sectional view taken along line 9-9 of FIG. 5;

FIG. 10 is an enlarged partial view of FIG. 5;

FIG. 11 is an enlarged transverse cross-sectional view taken along line 11-11 of FIG. 5;

FIG. 12 is an enlarged transverse cross-sectional view taken along line 12-12 of FIG. 5;

FIG. 13 is a partial front sectional view taken along line 13-13 of FIG. 5;

FIG. 14 is a partial side cross-sectional view taken generally along line 14-14 of FIGS. 1 and 2;

FIG. 15 is a diagram showing a use form of the tool.

FIG. 16 is a side view of a tool obtained by improving the tool of FIGS. 1 to 15;

FIG. 17 is a side sectional view of the tool shown in FIG. 16;

[Explanation of symbols]

1, 1A: tool, 3: body, 9: motor chamber, 1
DESCRIPTION OF SYMBOLS 1 ... Rotor, 13 ... Drive shaft, 15 ... Intake, 17
... Hose connector, 19 ... Hole, 21 ... Air feed pipe, 23
... Valve, 25 ... Lever, 27 ... Exhaust passage, 29 ... Exhaust outlet, 31 ... Air deflector, 33 ... Tube metal member, 3
5 ... cover, 37 ... cross-block, 39 ... opening,
43 ... recess, 45 ... front end, 47 ... ball bearing cage, 49 ... ball bearing, 51 ... rear trunnion, 53 ... vane, 55 ... motor cylinder, 5
7: Ball bearing cage, 59: Ball bearing, 63: Retainer, 67: Nose, 75: Opening,
76 ... hole, 77 ... hole, 79 ... hole, 81 ... shoulder, 83 ...
Hole: 85: valve member, 86: seal, 87: coil compression spring, 88: plug, 90: seal, 93: passage, 9
7 ... passage, 99 ... valve stem, 101 ... port, 10
3 ... Pivot, 107 ... Channel, 108 ... Notch,
109 ... notch, 111, 111a ... notch, 113 ...
Passageway, 114, 114a ... notch, 115 ... passageway, 11
7 ... tubular mounting part, 119 ... O-ring, 121 ... opening, 123 ... front section, 125 ... flange, 1
27 ... rear section, 129 ... O-ring, 131 ...
Ball stopper, 133 ... spring, 135 ... annular groove, 137 ...
Flange, 139: thread cutting, 141: recess, 143 ...
Annular wall, 145 ... annular space, 147 ... O-ring, 14
9 ... flange, 151 ... opening, 153 ... rib, 15
5,155A: storage section, 157,157A: first section, 159: rear end wall, 161: side wall, 163: side wall, 165: back wall, 167: front wall, 169,169A
... second section, 171 ... annular flange, 173 ... shoulder, 175 ... channel, 177 ... web, 179 ... side, 181 ... end wall, 183,183A ... close plate, 185 ... screw, 187 ... output shaft, 189 ... ratchet, 191 ... bearing, 193 ... circular structure,
195: opening, 197: outer end portion, 199: recess, 201: coil compression spring, 203: ball stopper, 2
05 ... mechanism, 207 ... mechanism, 209, 209A ... pawl carrier, 211 ... pawl, 213 ... pawl, 215 ...
Pivot, 217 ... Pivot, 221 ... Tail, 223 ...
Tail, 225 ... end, 227 ... end, 229 ... torsion spring, 231 ... pivot pin, 233 ... cam, 235 ... camshaft, 237 ... groove, 239 ... lever, 241 ... stop, 243 ... stop, 245 ... Crank, 247 ... Ball bearing, 249 ... Crank pin, 251,2
51A ... link, 253 ... slot, 255 ... connection part,
257: opening, 261: end of link, 263: planetary gear drive, 265: planetary gear, 267: sun gear, 2
69: ring gear, 271: socket, M: motor, S
…surface.

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[Procedure amendment]

[Submission Date] June 21, 2001 (2001.6.2)
1)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 6

FIG. 5

FIG. 7

FIG. 8

FIG. 9

FIG. 10

FIG. 11

FIG.

FIG. 13

FIG. 14

FIG.

FIG. 16

FIG.

Claims (10)

[Claims] 1. A hand-held power tool having a front end and a rear end when held in a hand, and a hand-held size and shape having a shaft extending straight in a longitudinal direction. An elongated body; the body having a motor chamber therein near a forward end thereof;
A motor in the chamber; the body having a housing on a forward extension from a front end thereof; the housing having a first section at a front end of the body, and a front section from the first section. A second having a relatively elongated structure extending
Having a section; the second section having a smaller cross-section than the first section and offset in one direction of the first section; and about a transverse axis near the front end of the second section. An output shaft mounted in the second section for rotation in one direction or the opposite direction; the output shaft protruding from the second section to attach an attachment for rotating a fastening element. Having a distal portion; the motor having a drive shaft that rotates about an axis of a body extending from the motor chamber into the first section; and having the output shaft in one direction or an opposite direction. A mechanism in the second section that can be driven by the drive shaft; and a mechanism in the second section that is driven by the drive shaft. Power tool comprising; a mechanism in the first section for transmitting the drive and in the transverse direction to the output shaft for driving the. 2. The hand-held power tool according to claim 1, wherein the second section is offset to one side of a shaft of the main body. 3. The motor of claim 1, wherein said motor is a pneumatic motor having a rotor, said rotor rotating within said motor chamber about an axis of said body, said body having a compressed air intake at its forward end. An air delivery passage having a valve therein for flowing compressed air from the intake port to the motor, wherein the main body is a member which can be manually operated by holding a tool for operating the valve, and the motor The hand-held power tool according to claim 1, further comprising an air exhaust passage for exhausting air from the chamber. 4. The hand-held power tool according to claim 3, wherein the second section is offset to one side of a shaft of the main body. 5. The hand-held power tool according to claim 4, wherein the second section is parallel to the axis of the body. 6. The outer end portion of the output shaft, wherein the valve operating member is on one side of the body and the second section is offset toward the same side and has a side corresponding to the side. 6. The hand-held power tool according to claim 5, wherein a protrudes from the side of the second section. 7. The second section is angled outwardly away from the axis, the valve opening member is on one side of the body, and the second section is away from that side. Is angled,
A side facing in a direction toward the side of the body, wherein the outer end portion of the output shaft is the second end.
5. The hand-held power tool according to claim 4, protruding from said side of the section. 8. A mechanism in a second section for driving said drive shaft in one direction or the other, comprising a ratchet on said output shaft and a pawl carrier having a front end and a rear end. A pair of pawls are pivotally supported midway between the ends to vibrate in the second section about an axis parallel to the output shaft, and a pair of pawls mounted on the pawl carrier cause the pawl carrier to vibrate. Selectively engaging one ratchet with the ratchet to rotate the ratchet and output shaft in one direction and engaging the other ratchet with the ratchet to rotate the ratchet in the opposite direction. A mechanism in the first section for transmitting drive to an output shaft that can be positioned and drives the mechanism A crank rotatable about the axis of the body driven by the drive shaft having a crankpin circulating about the axis of the body extending forward, and a link having an elongated slot extending straight to receive the crankpin. The hand-held power tool of claim 1, wherein the link extends from the pin to the pawl carrier and has a connection with the pawl carrier near a rearward end of the pawl carrier for vibration of the pawl carrier. . 9. The link between the link and the pawl carrier is a rotary connection that allows the pawl carrier to rotate relative to the link by causing the link to vibrate the pawl carrier. A hand-held power tool according to claim 8. 10. A reduction drive between said output shaft and said crank, said reduction drive comprising: a sun gear on said output shaft; and said planetary gear on said crank meshing with said sun gear. 9. The hand-held power tool according to claim 8, wherein the tool is a planetary gear drive.