DE202016105314U1 - Correction structure of the torque value of a torque wrench - Google Patents

Abstract

Correcting structure of the torque value of a torque wrench comprising a handlebar (10), a drive rod (20), a cube (30), a slider (40), a spring (50), and a handle group (60), the handlebar (10) a tube having a first end (11) and a second end (12), the first end (11) having a hinge hole (110), the second end (12) having a thread (120) on the outside, wherein the drive rod (20) has a ratchet head (21), wherein from the ratchet head (21) a force arm (22) extends, wherein the force arm (22) through the first end (11) is pushed into the arm bar (10) and an outer end (221) and an inner end (221), wherein between the inner end (221) and the arm rod (10), a gap (23) is present, wherein at the end face of the inner end (221) has a recess (22) 24), wherein the outer end (222) corresponding to the hinge hole (110) of the arm bar (10) has a through hole (222). wherein a hinge pin (13) is passed through the hinge hole (110) and the through hole (222), whereby the outer end (220) of the drive rod (22) is pivotally connected to the first end (11) of the arm bar (10) wherein the cube (30) is disposed in the arm bar (10) and protrudes into the recess (24) of the inner end (221) of the drive rod (22), the slider (40) being disposed in the arm bar (10) and corresponding to the recess (24) of the drive rod (22) has a recess (41), wherein the recesses (41) and (24) clamp the cube (30), wherein the spring (50) in the arm rod (10) and arranged with one end being supported on the other side of the slider (40), the handle group (60) including a handle (61), the handle (61) having internally a push rod (62) supporting the other end of the spring (50 ), and is screwed onto the thread (120) of the second end of the arm bar (10), wherein by turning the Han dgriffs the spring force of the spring (50) for the slider (40) can be adjusted so that by the spring force of the spring (50) the output torque of the drive rod (20) can be adjusted, characterized in that the power arm (22) of the drive rod (20) has close to the recess (24) has a screw hole (25) into which a screw (26) is rotated, which can protrude into the gap (23), wherein the arm rod (10) corresponding to the screw hole (25) a Through hole (14).

Description

The invention relates to a correction structure of the torque value of a torque wrench, which can easily correct the torque value before the torque wrench is supplied.

A torque wrench is a wrench for turning a bolt or a nut. If the torque of the wrench is greater than the predetermined torque value, the bolt or nut may break or slip. The conventional torque wrench can measure the torque value. If the measured value is greater than the predetermined torque value, a warning sound is generated, whereby the torque can be controlled.

From the Taiwanese Patent 135400 is a pressure lock of a torque wrench known. When adjusting the torque value, the handle ( 4 ) through the thread ( 23 ) of the arm bar ( 2 ), whereby the pressure force of the pressure element ( 34 ) against the spring ( 32 ) can be adjusted. The feather ( 32 ) creates a spring force on a cube holder ( 31 ). The cube ( 31 ) forms a recess ( 35 ). The main arm ( 1 ) forms at one end a recess ( 12 ). Between the recesses is a cube ( 3 ) clamped. When the torque of the key head ( 11 ) is greater than the predetermined torque value, the cube tilts ( 3 ) and thus pushes the spring ( 32 ) (the spring force of the spring ( 32 ) is smaller than the pressure force of the cube ( 31 )), whereby the recess ( 12 ) of the main arm ( 1 ) and the recess ( 35 ) of the cube holder ( 31 ) are offset, so that a noise by the impact against the inner wall of the arm rod ( 2 ) is produced.

The accuracy of the warning sound depends on the quality of the spring. The quality of the conventional springs may be different due to the material and the heat treatment. If the spring is too soft or too hard, a warning sound error (for too high torque) may occur. Before delivery, a test for the warning sound of the torque wrench is usually performed. If a warning sound error is found, the cube is exchanged for a cube of a different thickness (if the spring is too soft, the thickness of the cube should be greater, and if the spring is too hard, the thickness of the cube should be smaller ). This adjustment is awkward. Therefore, the test is powerful and time consuming.

It is an object of the present invention to provide a torque wrench torque value correction structure including a handle bar, a drive rod, a cube, a slider, a spring, and a handle group, the arm bar being a tube and having a first end and a second end wherein the first end has a hinge hole, the second end being threaded on the outside, the drive rod having a ratchet head, a power arm extending from the ratchet head, the power arm being slid into the arm bar through the first end, and has an outer end and an inner end, wherein between the inner end and the arm bar, a gap is provided, wherein on the front side of the inner end a recess is formed, wherein the outer end corresponding to the hinge hole of the arm bar has a through hole, wherein a hinge pin is passed through the hinge hole and the through hole, whereby the outer end of the drive rod is pivotally connected to the first end of the arm rod, wherein the cube is arranged in the arm rod and projects into the recess of the inner end of the drive rod, wherein the slider is arranged in the arm rod and corresponding to the recess of the drive rod has a recess wherein the recesses pinch the cube, the spring being disposed in the arm bar and supported at one end on the other side of the slider, the handle group including a handle, the handle having a push rod inside the other end of the spring presses, and is screwed onto the thread of the second end of the arm bar, wherein by rotating the handle, the spring force of the spring can be adjusted for the slider, so that the output torque of the drive rod can be adjusted by the spring force of the spring, characterized in that the Power arm of the drive rod close to the recess has a screw hole into which a screw is screwed, which can protrude into the gap, wherein the arm bar corresponding to the screw hole has a through hole. If the warning for the given torque value does not occur correctly before delivery when testing the torque wrench on a test table because the spring is too soft or too hard, the screw can be turned in the through hole of the arm rod by a wrench. Thereby, the length of the screw protruding from the screw hole can be changed the size of the gap between the inner end of the power arm and the arm bar. If the output torque is greater than the predetermined torque, the cube tilts and thus pushes the slider and the spring. Incidentally, by adjusting the size of the gap, the occurrence time of the noise generated by the impact of the inner end of the power arm or the screw against the inside of the arm bar can be corrected. Thereby, the spring force of the spring can be adjusted precisely, so that the torque test is facilitated.

Another object of the present invention is to provide a correction structure of the torque value of a torque wrench, wherein the screw in the screw hole of the inner end of the power arm is a hex bolt having a hexagonal recess at the end facing the through hole of the arm bar. A hexagonal wrench can be inserted through the through hole in the hex recess to rotate the screw, whereby the projecting out of the screw hole length of the screw can be adjusted.

In the following the invention with reference to a preferred embodiment with reference to the drawings will be described in detail. In the drawing shows:

1 an exploded view of the torque wrench according to the invention,

2 a sectional view of the torque wrench according to the invention,

3 an enlarged view of the zone A in 2 .

4 an enlarged view of the torque wrench according to the invention,
with the cube tilting and the inner end of the power arm bumping against the inside of the arm bar,

5 a sectional view during the adjustment of the screw of the torque wrench according to the invention,

6 an enlarged view of the torque wrench according to the invention,
the screw protrudes slightly out of the screw hole,

7 an enlarged view according to 6 wherein the inner end of the power arm abuts against the inside of the arm bar,

8th an enlarged view of the torque wrench according to the invention,
wherein the protruding length of the screw is increased from the screw hole and

9 an enlarged view according to 8th , wherein the inner end of the power arm abuts against the inside of the arm bar.

Like from the 1 . 2 and 3 3, the torque wrench according to the invention provided with a correction structure of the torque value comprises an arm rod (FIG. 10 ), a drive rod ( 20 ), a cube ( 30 ), a slider ( 40 ), a feather ( 50 ) and a grip group ( 60 ). The arm bar ( 10 ) is a tube and has a first end ( 11 ) and a second end ( 12 ) on. The first end ( 11 ) has a joint hole ( 110 ). The second end ( 12 ) has a thread on the outside ( 120 ). The drive rod ( 20 ) has a ratchet head ( 21 ). From the ratchet head ( 21 ) extends a power arm ( 22 ). The power arm ( 22 ) is replaced by the first end ( 11 ) in the arm bar ( 10 ) and has an outer end ( 221 ) and an inner end ( 221 ). Between the inner end ( 221 ) and the arm bar ( 10 ) is a gap ( 23 ) available. At the front of the inner end ( 221 ) is a recess ( 24 ) educated. The outer end ( 222 ) has according to the joint hole ( 110 ) of the arm bar ( 10 ) a through hole ( 222 ). A hinge pin ( 13 ) is passed through the hinge hole ( 110 ) and the through hole ( 222 ), whereby the outer end ( 220 ) the drive rod ( 22 ) with the first end ( 11 ) of the arm bar ( 10 ) is hinged. The cube ( 30 ) is in the arm bar ( 10 ) and projects into the recess ( 24 ) of the inner end ( 221 ) the drive rod ( 22 ) one. The slider ( 40 ) is in the arm bar ( 10 ) and has according to the recess ( 24 ) the drive rod ( 22 ) a recess ( 41 ). The recesses ( 41 ) and ( 24 ) pinch the cube ( 30 ). The feather ( 50 ) is in the arm bar ( 10 ) and with one end on the other side of the slider ( 40 ) supported. The grip group ( 60 ) includes a handle ( 61 ). The handle ( 61 ) has inside a push rod ( 62 ), which is the other end of the spring ( 50 ) and presses on the thread ( 120 ) of the second end of the arm bar ( 10 ) screwed. By turning the handle, the spring force of the spring ( 50 ) for the slider ( 40 ) are adjusted so that by the spring force of the spring ( 50 ) the output torque of the drive rod ( 20 ) can be adjusted. The feature of the invention is that the power arm ( 22 ) the drive rod ( 20 ) close to the recess ( 24 ) a screw hole ( 25 ) into which a screw ( 26 ), which is in the gap ( 23 ) can (fill in). The arm bar ( 10 ) corresponding to the screw hole ( 25 ) a through hole ( 14 ) on. Like from the 2 and 4 can be seen if the warning for the torque value does not occur correctly before delivery during the test of the torque wrench on a test bench (not shown), since the spring ( 50 ) is too soft or too hard (eg the inner end ( 221 ) of the power arm ( 22 ) pushes against the inside of the arm bar ( 10 ) and generates a noise when the measured value is greater than the predetermined torque value, or when the measured value is still smaller than the predetermined torque value, a noise is generated early), as shown in 5 is shown, the screw ( 26 ) in the through hole ( 14 ) of the arm bar ( 10 ) from a wrench ( 70 ) to be turned around. Like from the 6 and 8th can be seen, that of the screw hole ( 25 ) outstanding length of Screw ( 26 ) the size of the gap ( 23 ) between the inner end ( 221 ) of the power arm ( 22 ) and the arm bar ( 10 ) to be changed. Like from the 7 and 9 it can be seen that when the output torque is greater than the predetermined torque, the cube tilts ( 30 ) and thus pushes the slider ( 40 ) and the spring ( 50 ). By adjusting the size of the gap ( 23 ) the time of occurrence of the noise caused by the impact of the inner end ( 221 ) of the power arm ( 22 ) or the screw ( 26 ) against the inside of the arm bar ( 10 ) is corrected. This allows the spring force of the spring ( 50 ) can be set precisely ( 2 ), so that the torque test is facilitated.

Like from the 1 . 2 and 3 can be seen, the screw ( 26 ) in the screw hole ( 25 ) of the inner end ( 221 ) of the power arm ( 22 ) a hexagon screw, which at the through hole ( 14 ) of the arm bar ( 10 ) facing end a hexagonal recess ( 260 ) owns. How out 5 can be seen, a hexagonal wrench ( 70 ) through the through hole ( 14 ) in the hexagonal recess ( 260 ) are plugged to the screw ( 26 ) to turn. Like from the 6 and 8th can be seen, thereby from the screw hole ( 25 ) outstanding length of the screw ( 26 ) (the size of the gap ( 23 ) between the screw ( 25 ) and the inside of the arm bar ( 10 )).

The foregoing description is only a preferred embodiment of the invention and is not intended to serve as a definition of the limits and scope of the invention. All equivalent changes and modifications are within the scope of this invention.

LIST OF REFERENCE NUMBERS

10

 arm bar

11

 first end

110

 pivot hole

12

 second end

120

 thread

13

 hinge pins

14

 Through Hole

20

 drive rod

21

 ratchet head

22

 power arm

220

 outer end

221

 inner end

222

 Through Hole

23

 gap

24

 recess

25

 Look Bloch

26

 screw

260

 hexagonal recess

30

 cube

40

 pusher

41

 recess

50

 feather

60

 handle group

61

 handle

62

 pressure bar

70

 wrench

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• TW 135400 [0003]

Claims (2)

Correction structure of the torque value of a torque wrench, which is an arm rod ( 10 ), a drive rod ( 20 ), a cube ( 30 ), a slider ( 40 ), a feather ( 50 ) and a grip group ( 60 ), wherein the arm bar ( 10 ) is a tube and a first end ( 11 ) and a second end ( 12 ), wherein the first end ( 11 ) a joint hole ( 110 ), the second end ( 12 ) on the outside a thread ( 120 ), wherein the drive rod ( 20 ) a ratchet head ( 21 ), wherein from the ratchet head ( 21 ) a power arm ( 22 ), wherein the power arm ( 22 ) through the first end ( 11 ) in the arm bar ( 10 ) and an outer end ( 221 ) and an inner end ( 221 ), wherein between the inner end ( 221 ) and the arm bar ( 10 ) A gap ( 23 ) is present, wherein at the end face of the inner end ( 221 ) a recess ( 24 ), wherein the outer end ( 222 ) according to the joint hole ( 110 ) of the arm bar ( 10 ) a through hole ( 222 ), wherein a hinge pin ( 13 ) through the hinge hole ( 110 ) and the through hole ( 222 ), whereby the outer end ( 220 ) the drive rod ( 22 ) with the first end ( 11 ) of the arm bar ( 10 ) is hinged, the cube ( 30 ) in the arm bar ( 10 ) is arranged and in the recess ( 24 ) of the inner end ( 221 ) the drive rod ( 22 ), wherein the slide ( 40 ) in the arm bar ( 10 ) is arranged and according to the recess ( 24 ) the drive rod ( 22 ) a recess ( 41 ), wherein the recesses ( 41 ) and ( 24 ) the cube ( 30 ), whereby the spring ( 50 ) in the arm bar ( 10 ) and with one end on the other side of the slider ( 40 ), whereby the grip group ( 60 ) a handle ( 61 ), wherein the handle ( 61 ) inside a push rod ( 62 ), which is the other end of the spring ( 50 ) and on the thread ( 120 ) of the second end of the arm bar ( 10 ) is screwed, wherein by turning the handle, the spring force of the spring ( 50 ) for the slider ( 40 ) can be adjusted so that by the spring force of the spring ( 50 ) the output torque of the drive rod ( 20 ), characterized in that the power arm ( 22 ) the drive rod ( 20 ) close to the recess ( 24 ) a screw hole ( 25 ) into which a screw ( 26 ), which is in the gap ( 23 ), wherein the arm rod ( 10 ) according to the screw hole ( 25 ) a through hole ( 14 ) having. Correction structure according to claim 1, characterized in that the screw ( 26 ) in the screw hole ( 25 ) of the inner end ( 221 ) of the power arm ( 22 ) is a hex screw, which at the through hole ( 14 ) of the arm bar ( 10 ) facing end a hexagonal recess ( 260 ) owns.

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