RU2291774C2 - Spanner with torque indicator - Google Patents

Abstract

FIELD: engineering of spanners.

SUBSTANCE: spanner contains handle with one catching head, positioned on one side of handle, or with two catching heads, positioned on different sides of handle, momentum meter, built into handle, electronic display, connected to momentum meter and mounted on external surface of handle, and sleeve, mounted on the handle with possible sliding movement along handle and covering of electronic display.

EFFECT: protection of electronic display from damage.

2 cl, 8 dwg

Description

FIELD OF THE INVENTION

The present invention relates to wrenches. The wrench according to the invention comprises a movable coupling on the handle of the wrench and a torque meter integrated in the handle in order to display the amount of torque on the electronic display.

DESCRIPTION OF THE PRIOR ART.

Known wrench capable of showing the magnitude of the torque (shown in Fig.7). Typically, such a key comprises a handle 100 with a head 200 located on one side of the handle 100, and a string integrated in the handle 100 (not shown in the drawing). The value of the torque of the wrench is displayed by tensioning the string. However, after a certain time, the string becomes fatigued, and the string is unable to accurately reflect the key torque.

Another known wrench depicted in FIG. 8 comprises an electronic display 300 on the outer surface of the handle. A characteristic disadvantage of such a key is that the open display 300 limits the working space of the wrench, in addition, when in contact with foreign objects, such a display may be damaged.

An object of the present invention is to provide a wrench that comprises a movable sleeve capable of covering an electronic display and thus providing protection.

SUMMARY OF THE INVENTION.

According to one aspect of the present invention, there is provided a wrench comprising a handle with one gripping head located on one side of the handle, or with two gripping heads located on either side of the handle, a torque meter integrated in the handle, an electronic display connected to the torque meter, and displayed on the outer surface of the handle, and a coupling mounted on the handle with the possibility of sliding movement along the handle and closing the electronic display.

The present invention will become more apparent from the following description, which contains references to the accompanying drawings, showing (for illustrative purposes only) a preferred embodiment of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 presents a block diagram showing the relationship between the parts of the electronic display of a wrench made according to the present invention.

Figure 2 shows the deformation of the material under the influence of force and torque.

Figure 3 shows a wrench made in accordance with the present invention, is shown in section.

Figure 4 shows a wrench made in accordance with the present invention, is shown in side section.

Figure 5 shows the display and keys located on the handle of a wrench according to the present invention.

Figure 6 shows how the clutch slides along the handle of a wrench.

7 and 8, two well-known wrenches are shown in perspective.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION.

Figure 3-6 presents a wrench made in accordance with the present invention, containing a handle 10 with two gripping heads - a head 12 'with an open pharynx and a closed head 12 - located on opposite sides of the handle 10, as well as a moment meter 20, built-in in the handle 10. The display 30 is mounted on the handle 10 and is equipped with a screen 31 and keys 32, moreover, the screen 31 and keys 32 are displayed on the outer surface of the handle 10 and are on the same level. The display 30 is connected to the momentometer 20 in such a way that when the torque acts on the momentum, the magnitude of the torque is displayed on the display screen 31. The movable sleeve 40 is mounted on the handle 10 with the possibility of sliding movement along the handle 10 and, sliding on it, can close the display screen 31 and keys 32. Thus, the display screen 31 and keys 32 are protected from damage.

Figure 1 presents a diagram reproducing the blocks of the display circuit 30 (a torque meter - an energy source - a Wheaton bridge - an amplifier - a recording device - an information processor - an output device), and Figure 2 shows some theoretical data on rotation. The letter S denotes the length of the arc, l2 is the unit length of the object subjected to the force, and C is the point of application of force. After the force is applied, S> δ2, the momentometer 20 is deformed and sends a signal through the Whiston Bridge. Similarly, when a torque is applied to a cylindrical object and twists it at an angle φ, it sends a signal by changing the voltage. The resistance is R = ρxl / A, where A is the specific area. The change in resistance is converted into an output voltage, which is amplified by an amplifier and processed by an information processor in order to convert similar signals into digital signals, which are reflected on the display screen 31.

While the embodiment of the invention has been demonstrated and described above, it will be apparent to one of ordinary skill in the art that, without going beyond the scope of the present invention, other embodiments of the invention can be embodied.

Claims (2)

1. A wrench containing a handle with one gripping head located on one side of the handle, or with two gripping heads located on opposite sides of the handle, a moment meter integrated in the handle an electronic display connected to the momentometer and displayed on the outer surface of the handle, and a clutch mounted on the handle with the possibility of sliding movement along the handle and closing the electronic display. 2. The wrench according to claim 1, characterized in that the screen of the electronic display is located at the same level with the surface of the handle.

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