CN113799042B

CN113799042B - Warning device for torque adjustment

Info

Publication number: CN113799042B
Application number: CN202110431657.3A
Authority: CN
Inventors: 吴逸民
Original assignee: Sunfeng Industrial Co ltd
Current assignee: Sunfeng Industrial Co ltd
Priority date: 2020-06-16
Filing date: 2021-04-21
Publication date: 2023-04-07
Anticipated expiration: 2041-04-21
Also published as: TW202200316A; FR3111287A1; JP2021194764A; FR3111287B1; GB202103950D0; CN113799042A; JP7109112B2; TWI727829B; GB2596180A; GB2596180B

Abstract

The invention provides a warning device for torque adjustment, which comprises a torque wrench, a handle, a knob, a scale ring and an adjusting button, wherein the knob determines the torque value of the torque wrench, the scale ring is arranged between the handle and the adjusting button, and the adjusting button linearly displaces relative to the handle at a locking position and an unlocking position. The warning device of the present invention includes: the knob has a colored outer circumferential surface and a color ring. When the lock is unlocked, the adjusting knob shields the outer circumferential surface of the knob, a visual area is exposed on one side of the scale ring, and a color ring is seen through the visual area and has different colors from the outer circumferential surface of the knob. When the lock is in the locked position, the scale ring is arranged beside the adjusting button and is close to the handle, the adjusting button is exposed out of the outer circumferential surface of the knob, and the visible area is hidden. Therefore, the warning device warns or reminds in color, the torque wrench is in a locking or unlocking state, and the use safety is improved.

Description

Warning device for torque adjustment

Technical Field

The invention relates to a warning device of a hand tool, in particular to a torque wrench, which is a reminding or warning device for closing or opening torque adjustment.

Background

Known torque wrenches have a support member with one end pivotally connected to a head and the other end to which a handle is secured. The pin joint structure comprises: an arm and a shaft, the arm extending outwardly from the head by a certain length and further inserted into the hollow support member. The shaft is usually a rivet which passes through the support member and the arm, and the end of the support arm which goes deep into the support member contacts one side of a castanet. The other side of the castors is in rolling contact with a pressing block which pushes the castors to touch the power source of the arm, and the pressing block comes from a compression spring embedded in the supporting piece.

In use, the head is directly or indirectly coupled to a workpiece, such as a screw, bolt or nut. The distance from the head to the handle is multiplied by a force applied to the handle by the user to provide a torque at which the torque wrench rotates the workpiece. The torque meets a reaction force of the workpiece at the castors, and when the torque is greater than or equal to the reaction force, the workpiece continues to be locked or unscrewed. If the torque is smaller than the reaction force, the arm is separated from the castors, the transmission of the torque to the workpiece is interrupted, and the thread structure is prevented from being damaged by external force.

However, the castors do not tell the user that the torque wrench adjustment function is on or off.

Disclosure of Invention

In view of this, the present inventors propose a warning device, which mainly aims to: the visual structure is adopted to help a user to know the adjusting function of the closing torque of the wrench or the adjustable opening state.

In view of the foregoing, the present invention provides a warning device for torque adjustment, comprising:

a torque wrench configured with a handle;

a knob having a colored outer circumferential surface, the knob being provided with a grip for determining a torque value of the torque wrench;

the adjusting button can linearly displace between a locking position and an unlocking position relative to the handle, and shields the outer circumferential surface of the knob in the unlocking position;

the scale ring is positioned between the handle and the adjusting button, and is arranged in parallel with the adjusting button and is close to the handle when in a locking position, and the adjusting button is exposed out of the outer circumferential surface of the knob;

the visual area is exposed on one side of the scale ring when the adjusting button is in the unlocking position, and is hidden when the adjusting button is in the locking position; and

a color circle can be seen through the visible area, and the color of the color circle is different from the color of the outer circumferential surface of the knob.

The warning device for torque adjustment is characterized in that the visual area is between the scale ring and the adjusting knob.

The warning device for torque adjustment is characterized in that the color ring is sleeved outside the adjusting button.

The warning device for torque adjustment wherein a groove on the exterior of the knob receives the color ring.

The warning device for torque adjustment is characterized in that the handle is combined with a transparent cover, the transparent cover covers the scale ring, the scale ring can be limited not to linearly displace along with the adjusting button, and the adjusting button is not interfered to drive the scale to rotate around the handle.

The warning device for torque adjustment is characterized in that the scale ring is provided with a group of numbers.

The warning device for torque adjustment is characterized in that the visual area is arranged between the scale ring and the handle.

The warning device for torque adjustment is characterized in that the color ring is arranged outside a hidden part of the handle, and when the adjusting button is in a locking position, the hidden part is shielded by the scale ring or the adjusting button.

Therefore, the warning device of the invention consists of the outer circumferential surfaces of the color ring and the knob, displays that the adjusting knob is in a locking or unlocking state through the color of one of the color ring and the knob, warns or reminds the attention of a user, and improves the use safety.

One or more preferred embodiments of the present invention will become apparent to one or more other skilled in the art upon review of the following detailed description of the preferred embodiments, when read in conjunction with the appended drawings.

Drawings

Fig. 1 is a perspective view of a torque wrench in an assembled state.

Fig. 2 is an enlarged view of the grip.

Fig. 3 is a cross-sectional view showing the internal structure of the first embodiment of the warning device of the present invention in the locked position.

Fig. 4 is a cross-sectional view of the internal structure of the alarm device in the unlocked position.

Fig. 5 is a schematic view of the grip in the unlocked position.

Fig. 6 is a schematic view of the second embodiment of the warning device in an unlocked position.

Description of reference numerals: a torque wrench 10; a support member 12; a head 14; a grip 16; an adjustment mechanism 18; a torque display 20; a straight bar 22;

scales

24, 26; a colored segment 28; an arrow head portion 30; the number 31; a scale ring 32; an adjusting knob 33; a transparent cover 34; a coupling member 35; a color wheel 36; a catch structure 37; a viewable area 38; a groove 39; a knob 40; an outer circumferential surface 41; a cover 42; a transmission rod 43; a support construction 44; and a hidden portion 45.

Detailed Description

Fig. 1 is a perspective view illustrating an assembled state of a torque wrench 10. The torque wrench 10 is shown having a handle 16 with an adjustment mechanism 18 disposed at one end of the handle 16 and a support member 12 coupled to the other end. A head 14 pivotally connects the support 12, the head 14 and the handle 16 being at opposite ends of the torque wrench 10.

Fig. 2 is a plan view showing an enlarged exterior of the grip 16 with a torque display 20 and an arrow head 30. The torque indicator 20 is configured as a transparent bar 22, and a set of scales 24 on one side of the bar 22, in contrast to a colored segment 28, can interpret the torque value of the torque wrench 10 in metric units, such as the data in front of the decimal point. A set of graduations 26 on the opposite side of the bar 22 represent torque values in english units.

The adjustment mechanism 18 includes, but is not limited to: a scale ring 32. The outside of the scale ring 32 is provided with a set of scales (not numbered) with one end facing the arrow head 30 and the other end displaying a number 31, which obtains finer data, such as a number after a decimal point. Thus, the actual torque value of the torque wrench 10 can be accurately known by adding the first and second data of the decimal point.

The adjusting mechanism 18 also has an adjusting knob 33 and a rotary knob 40. The knob 33 is lined with a scale ring 32, and the scale ring 32 is closely contacted with the end of the grip 16 so that the outer circumferential surface 41 of the knob 40 is exposed from the knob 33. The color of the outer circumferential surface 41 indicates that the knob 33 is in a locked position and torque cannot be adjusted, so that the torque wrench 10 is now safe.

In this embodiment, the color of the outer circumferential surface 41 is derived from the color of the knob 40, such as red, yellow or bright color. In some embodiments, the color of the outer circumferential surface 41 is provided by a sticker, film, or other attachment on the exterior of the knob 40.

Fig. 3 is a sectional view showing an internal structure of a part of the torque wrench. In the figures, one support structure 44 is stationary between the grip 16 and the knob 40. A transmission rod 43 is coupled to the knob 40 through a support structure 44, and a cover 42 covers the end surface of the knob 40 to prevent dust or dirt from intruding into the inside of the knob 40. Therefore, the knob 40 is kept at a predetermined distance from the grip 16, and the adjustment knob 33 is partially exposed from the outer circumferential surface 41.

In the locked position, the knob 33 covers a hidden portion of the grip 16. The concealing portion is an annular flange that forms a catch structure 37 with the knob 33. The detent structure 37 is the meshing relationship of the two rows of straight teeth so that the knob 33 cannot rotate relative to the handle 16. The same straight-toothed engagement is implemented at the position where the knob 40 is inserted into the knob 33, and restricts the linear displacement of the knob 33 relative to the knob 40 from the lock position to an unlock position. Therefore, the knob 33 bites the grip 16, and the knob 40 does not rotate relative to the grip 16. Of course, the knob 40 guides the adjusting button 33 to move to the unlocking position, and the clamping relation between the handle 16 and the adjusting button 33 is released; it is also possible to guide the knob 33 back to the locked position so that the knob 33 again locks the grip 16 against rotation.

Fig. 4 is also a cross-sectional view depicting the action of the internal structure of the torque wrench. In the unlocked position, the detent structure 37 is disengaged, releasing the knob 33 from the detent relationship with the handle 16. The adjustment knob 33 is moved away from the grip 16 and covers the outer circumferential surface 41 of the knob 40 such that a viewing area 38 is exposed on a single side of the scale ring 32. The adjusting knob 33 drives the knob 40 to rotate in the same direction, so as to drive the transmission rod 43 to move in the hollow supporting member 12, thereby achieving the effect of torque adjustment of the torque wrench.

The viewing area 38 is shown between the scale ring 32 and the adjustment knob 33, and a color ring 36 of the adjustment knob 33 is visible through the viewing area 38. A groove 39 of the knob 33 receives the color wheel 36 so that the surface of the knob 33 remains flat.

In this embodiment, the color ring 36 is a band, which is sleeved outside the adjusting button 33. In some embodiments, the color wheel 36 is paint that fills the groove 39 of the knob 33.

The dial ring 32 also retains a straight tooth structure that engages with the knob 33. Thus, the adjusting knob 33 bites the grip 16, and the scale ring 32 does not rotate relative to the grip 16. The adjusting knob 33 is away from the grip 16, but can drive the scale ring 32 to rotate in the same direction, so that the scale ring 32 can present the adjusted torque value.

At the same time, a transparent cover 34 covers the scale ring 32. The transparent cover 34 is fixed to the handle 16 by a connecting member 35, so that the transparent cover 34 prevents the scale ring 32 from linearly moving along with the adjusting button 33, but does not interfere with the adjusting button 33 to drive the scale ring 32 to rotate around (the hidden portion of) the handle 16.

Fig. 5 is a plan view showing the grip 16 in the unlocked position. The visible area 38 shows the color of the color ring 36, such as green, blue or a dark color series, different from the color of the outer circumferential surface 41 of the knob 40. Therefore, the color ring 36 can warn or alert the user that the torque wrench 10 is in the torque adjustment state and is not suitable for locking or loosening a workpiece.

Returning to fig. 3, the knob 33 returns to the locked position immediately adjacent the dial ring 32. The handle 16 and the adjusting knob 33 are engaged again to restore the engagement of the engaging structure 37 with the straight teeth. At the same time, the visible area is hidden in the locked position, so that the scale ring 32 shields the color ring 36, resulting in the outer circumferential surface 41 of the knob 40 being exposed outside the adjustment knob 33.

Thus, the outer circumference 41 of the knob 40 and the color ring 36 constitute a warning device. The first embodiment of the warning device warns or reminds the user whether to operate the torque wrench 10 safely by the color of the outer circumferential surface 41 of the knob 40 or the color ring 36.

Fig. 6 shows a second embodiment of the warning device, which has a structure substantially identical to that of the first embodiment, with the difference that: the visible area 38 is between the scale ring 32 and the grip 16.

In brief, the coupling member 35 fixes the transparent cover 34 to the adjustment knob 33, and the transparent cover 34 covers the scale ring 32, and the scale ring 32 is linearly displaced and rotated in the same direction as the adjustment knob 33.

In the unlocked position, the visible area 38 is between the scale ring 32 and the grip 16. The color circle 36 is visible from the visible area 38, and the color circle 36 is disposed on an exterior surface of a hidden portion 45 of the grip 16.

In the locked position, the hidden portion 45 is hidden by the dial ring 32 or the knob 33, so that the visible area is hidden in the locked position.

Claims

1. A warning device for torque modulation, comprising:

a torque wrench configured with a handle;

a knob disposed on the handle for determining a torque value of the torque wrench, the knob having a colored outer circumferential surface;

the adjusting button can linearly displace between a locking position and an unlocking position relative to the handle, and the adjusting button shields the outer circumferential surface of the knob in the unlocking position;

the scale ring is positioned between the handle and the adjusting button, and is arranged in parallel with the adjusting button and is close to the handle when in a locking position, and the outer circumferential surface of the knob is exposed out of the adjusting button;

the visual area is exposed on one side of the scale ring when the adjusting knob is at the unlocking position, and is hidden when the adjusting knob is at the locking position; and

a color wheel visible through the viewable area, the color wheel having a color different from a color of the outer circumferential surface of the knob.

2. The warning device for torque adjustment of claim 1, wherein the visible area is between the scale ring and the adjustment knob.

3. The warning device for torque modulation as claimed in claim 2, wherein the color ring is fitted over the exterior of the knob.

4. A warning unit for torque modulation as claimed in claim 3 wherein a slot in the exterior of the knob receives the color wheel.

5. A warning unit for torque modulation as claimed in claim 2, 3 or 4, wherein the handle incorporates a transparent cover which covers the scale ring to restrict the scale ring from linear displacement with the knob without interfering with the knob to rotate the scale ring around the handle.

6. The warning device for torque modulation as claimed in claim 5, wherein the graduated ring has a set of numbers.

7. The warning device for torque modulation as claimed in claim 1, wherein the visible area is between the scale ring and the grip.

8. The warning device for torque modulation as claimed in claim 7, wherein the color ring is disposed outside a hidden portion of the grip, the hidden portion being hidden by the scale ring or the knob when the knob is in the locked position.

9. A warning unit for torque modulation as claimed in claim 7 or 8 wherein the graduated ring is provided with a set of numerals.