TWI393611B - Torque tool - Google Patents

Description

Torque tool

The present invention relates to a torque tool according to the preamble of claim 1 having a tool head, a shaft and a handle.

The term torque tool (especially an adjustable torque tool) should be understood as an assembly tool for screws and nuts that can be used to lock a bolt assembly with a specific tightening torque and such assembly tools. Therefore, the tightening torque is signaled by the release of a torque tool. This is indicated to the technician by, for example, one of the torque wrenches and/or a tactile signal.

In the case of a bolting assembly, if it is necessary to set a precise tightening torque, a torque tool (especially a torque wrench) is set to correspond to one of the tightening torques to release the torque.

This torque tool (especially a torque wrench and similar hand tools) can be used with a variety of functional principles. Typically, the technician sets the release torque by relatively adjusting (eg, the shaft and handle) prior to locking the bolt. DE 20 2007 008 522 U1 This type of torque tool is considered prior art.

In order to persist a desired set release torque, the set release torque is fixed by preventing relative movement between the adjustable components, in this case, for example, braking of one of the handle and the shaft. However, in the daily application field of torque tools, the release torque should be reliably set under mandatory preconditions and then used.

Therefore, it is of the utmost importance to lock the torque wrench during use to resist unintentional twisting of the handle relative to the shaft. Therefore, the skilled person desires to be able to reliably and easily recognize the locked state during use.

Accordingly, it is an object of the present invention to provide an identification of a torque tool that can be checked for lock status of torque settings from various operating positions via the possibility of such identification.

According to the present invention, the above-mentioned objects are achieved by the characteristics of the first aspect.

The advantageous design forms the subject of an affiliated technical solution.

The torque tool has a torque head, a shaft and a handle whereby a torque setting of a desired release torque can be set by twisting the handle relative to the shaft. A locking device is disposed at the end of the handle, and the locking device can be brought to an open position and a locked position by relative twisting relative to the handle, and the locking device facilitates torque setting. According to the present invention, the open position and the locked position of the locking device can be displayed via an identification member, whereby the identification member is disposed at the locking device, and the handle has a detection window so that the inspection can be viewed through The window reads the identification member to identify each of the locked positions (i.e., the open position and the locked position).

In the case of the torque tool according to the invention, a particular advantage is that this identification possibility can be applied to torque tools that are already on the market. There is no need to specifically develop individual components of the torque or torque tool; rather, the identification possibilities and inspection windows can be applied to torque tools that are already on the market via simple modifications.

Another advantage is the use of purely mechanical means for identification. This means that the technician does not have to rely on an electronic identification to indicate the locked state.

In addition, the identification possibilities are available for various braking functions. Thus, within the framework of the present invention, it is contemplated that the locking device can have a latching function or a locking function. Then, the identification member can be placed on the locking device respectively corresponding to the open position or the locked position, and the identification member can be read through the inspection window.

Additionally, the possibility of placing one, two or several inspection windows in the handle provides the skilled person with the advantage of being able to read the torque tool from any working position.

In a preferred embodiment, the identification member is designed in a color-coded manner. In this regard, it can be seen that the open position and the locked position in the architecture of the present invention have different indications, for example, in a color-coded manner. For example, green can be used to indicate an open position and red can indicate a locked position. The colour-coded identification makes reading easy, especially in the most varied viewing and illumination situations. By the term color design in the architecture of the present invention, it is understood that the color identification member is pasted in the form of a letter, a number or a letter or a number. These identifiers are then identified by color compared to the background.

In another preferred embodiment, the identification member is formed from an embossed relief surface. It is understood by the term surface imprint embossing within the framework of the present invention that, for example, various materials are adhered. In addition, imprinting, sandblasting, or laser processing can be understood by the term surface imprinting relief. Within the framework of the present invention, surface embossed embossments are characterized by various surface characteristics and surface roughness. In addition, it will be understood hereinafter to, for example, give a number of one of the color identification members imprinted. In many years of everyday use, surface embossing is particularly resistant to wear and tear and makes the locking position of the torque tool easy to read.

In a particularly preferred embodiment, the identification member is located on a circumferential groove of the locking device. In the context of the invention, the circumferential groove can thus also consist of a unique recess in the region of the surface of the identification member. The advantage of this connection is that one of the effective twisting possibilities within the handle continues to be maintained after a color or alternatively a surface identification device. Due to the recessed recesses, the applied identification of the non-mechanically worn form can also be revealed, for example, by a relative twist of the locking means.

In another preferred design variant, the torque tool is characterized in that the locking device is held by a pin in the handle against the compressive force of the pressure agent and the pin engages the recess of the locking device, whereby the recess It extends in the radial direction over an angular range of 60° to 120° (preferably 90°). Thus, the recess has a substantially V-shaped recess whereby the outer end of the recess forms an end stop when engaged with the latch fastened to the handle. It is contemplated within the framework of the present invention that the end stop of the open position corresponds to the other end stop of the locked position. Thus, the identification members of the open and locked positions respectively correspond to the recessed areas that engage the pins. For example, a transition of the identification member of the open position to the identification of the locked position can thus be achieved at the center of the recess. Within the framework of the present invention, this transition may occur along a flow through one of the separation lines or may also occur through a gap.

In a further advantageous embodiment, the recess has a bridge whereby the latching function of one of the locking means is produced by the wing portion of the bridge, the compressive force and the latch. Thereby, the plug acts as one of the compression forces generated by the pressurizing agent. Therefore, the pins are pressed into a respective groove area. Thus, the recessed area corresponds to the open position on one side and the locked position on the other side. The groove regions are separated from one another by a central bridge within the recess.

In a particularly preferred embodiment of the invention, a corresponding region is provided to each end stop which is located on a side surface of the locking device. It is particularly preferred to have an identification member located at a circumferential groove.

In a particularly preferred embodiment of the invention, at least two inspection windows are located at the handle whereby the inspection windows are circumferentially offset from each other. The advantage here is that the technician can read the locked state of the torque tool from almost any working position. Thus, within the framework of the present invention, it is contemplated to have, for example, two inspection windows at opposite sides and/or three inspection windows in a star shape offset from each other at the circumference of the handle.

Other advantages, features, characteristics and aspects of the invention are derived from the following description. A number of preferred embodiments are described by way of a schematic diagram to make the invention easier to understand.

In the drawings, the same element symbols are used for the same or similar parts, and the corresponding or equivalent advantages can be achieved even if the repeated description is omitted for the sake of simplicity.

1 is a cross-sectional representation of a torque tool 1 having a shaft 2 and a handle 3. A locking device 5 is located at the end 4 of the handle 3. The locking device 5 is held at the end portion 4 of the handle 3 by the pin 6 against the compressive force F of the pressurizing agent 7. A circumferential groove 9 is located at one side surface 8 of the locking device 5. A check window 10 is located at the height of the recess 9 in the handle 3. Identification members 11 not shown here may be located in the recess 9 and in the recess 9, respectively. The inspection window 10 allows the technician to read the locked state of the locking device 5.

Figure 2 is a cross-sectional representation of a locking device 5 having a circumferential groove 9 and two notches V shown therein in accordance with the present invention.

One side and top view of the locking device 5 according to the invention is presented in FIG. Here, the identification member 11 is clearly displayed in various surface diagrams. One of the bridge members 12 having the two side flaps 13 is located in the recess. The one end stop 14 is located at the upper end and the lower end of the recess with respect to the image plane. The latch 6 not shown here generates a latching function by the compressive force F such that the latch 6 holds the locking device 5 in the respective end stop 14. Here, two different identifiers 11 corresponding to the end stops 14 are provided. The identification member 11 is attached so that the identification member 11 can be easily read through the inspection window 10 when the insertion pin 6 is at the end stop 14.

Figure 4 presents a cross-sectional view of a locking device 5 according to the invention whereby a notch having two end stops 14 is depicted with a 90° profile. The continuous side flaps 13 of the bridge 12 force the pins 6 (not shown) into the respective end stop regions 14.

1. . . Torque tool

2. . . axis

3. . . handle

4. . . End of the handle

5. . . Locking device

6. . . plug

7. . . Pressurizer

8. . . Side surface

9. . . Groove

10. . . Inspection window

11. . . Identification piece

12. . . Bridge

13. . . Flank

14. . . End stop

F. . . Compression force

V. . . Notch

Figure 1 is a cross-sectional representation of a handle of a torque tool;

Figure 2 is a cross-sectional representation of a locking device;

Figure 3 is a side plan view of one of the locking devices; and

Figure 4 is an axial section of one of the locking devices in accordance with the present invention.

1. . . Torque tool

2. . . axis

3. . . handle

4. . . End of the handle

5. . . Locking device

6. . . plug

7. . . Pressurizer

8. . . Side surface

9. . . Groove

10. . . Inspection window

F. . . Compression force

Claims (9)

A torque tool (1) having a tool head, a shaft (2) and a handle (3) whereby a torque required to release torque can be set by twisting the handle (3) relative to the shaft (2) Setting, and a locking device (5) is disposed at an end portion (4) of the handle (3), the device can be moved to an open position and a locked position by relative twisting relative to the handle (3) Or releasable, the torque tool is characterized by an identification member (11) indicating the open position of the locking device (5) and the locking position, whereby the identification member (11) is disposed on the locking device (5) And the handle (3) has a inspection window (10), whereby the identification member (11) can be read through the inspection window (10). A torque tool according to claim 1, characterized in that the identification member (11) is provided in a color-coded manner. A torque tool according to claim 1 or 2, characterized in that the identification member (11) is provided by surface imprinting embossing. A torque tool according to claim 1 or 2, characterized in that the identification member (11) is located on a circumferential groove (9) of the locking device (5). A torque tool according to claim 1 or 2, characterized in that the locking device (5) resists a compressive force (F) of a pressurizing agent (7) by means of a latch (6) located in the handle (3) While being held, the latch (6) engages with the recess (V) of the locking device (5), whereby the recess spans an angular range of 60° to 120° in a radial direction and is preferably Extends across 90°. A torque tool according to claim 5, characterized in that the recess (V) has a bridge (12) whereby a latching function of one of the locking devices (5) can be achieved by the flank of the bridge (12) (13), compression force (F) and pin (6) are produced. A torque tool according to claim 5, characterized in that the end stop (14) of the latch (6) in the recess is configured to the open position and the one end stop (14) is configured to the locked position. A torque tool according to claim 7, characterized in that each end stop (14) is arranged to correspond to a corresponding area on one of the side surfaces (8) of the locking device (5). A torque tool according to claim 1 or 2, characterized in that the handle (3) has at least two inspection windows (10), whereby the inspection windows (10) are located offset from one another in a radial direction At the circumference of the handle (3).