TWI399265B - Rolling wheel of torque wrench - Google Patents

Description

Torque wrench structure

The present invention relates to a torque wrench, and more particularly to an acoustic wheel structure for a torque wrench.

Wrench is the most widely used locking tool in hand tools, which can be divided into ratchet wrenches and socket wrenches.

When the locking elements are locked on different parts, the required pressing force is different, and the more precise the parts, the more emphasis is placed on the accuracy of the locking force. However, the general wrench can not measure the torque of the locking component, which easily affects the smoothness or safety of the machine. Therefore, a torque wrench has been developed, which has a torque value preset. When the torque is exceeded in the process of locking the mechanical component, the torque wrench is switched to the idling state, and the mechanical component cannot be continuously locked.

Generally, the torque wrench is switched to the idling state when the torque exceeds the preset by the sound wheel structure. However, after the switching, the structure of the sound wheel tends to be unstable inside the torque wrench, thereby affecting the use of the torque wrench, and is more likely to further influence. The service life of the torque wrench.

Therefore, an aspect of the present invention provides a sound wheel structure of a torque wrench that stably sets the sound wheel structure in a torque wrench.

According to an embodiment of the present invention, a sound wheel structure of a torque wrench is provided, which comprises an acoustic wheel base, a roller and a positioning rod. The wheel body is cylindrical and has a groove at one end, and the length to diameter ratio of the wheel body is between 1.5 and 2.1. The roller is placed in the groove of the wheel body. The positioning rod is used for piercing the wheel body and the roller, so that the roller is pivoted at one end of the wheel body, and the diameter of the positioning rod is between 3.2 mm and 4.8 mm.

According to the acoustic wheel structure of the above-mentioned torque wrench, the ratio of the length to the diameter of the acoustic wheel base can be 2.0, and the diameter of the positioning rod can be 3.45 mm.

According to the acoustic wheel structure of the above-mentioned torque wrench, the acoustic wheel base body can be a solid cylinder or a hollow cylinder.

Thereby, the acoustic wheel seat body can maintain stability in the torque wrench, and the positioning rod can also make the roller more stable when rolling relative to the acoustic wheel seat body.

Please refer to FIG. 1 , which is a perspective view of a sound wheel structure 100 of a torque wrench according to an embodiment of the invention. The acoustic wheel structure 100 of the torque wrench includes an acoustic wheel base 110, a roller 120, and a positioning rod 130. The wheel body 110 is a cylinder and has a groove 111 at one end. The roller 120 is received in the slot 111 of the acoustic wheel housing 110. The positioning rod 130 is configured to pass through the wheel body 110 and the roller 120 to pivot the roller 120 at one end of the wheel body 110. The acoustic wheel base 110 can be a solid cylinder or a hollow cylinder.

Referring to FIGS. 2 and 3, respectively, a cross-sectional view of the acoustic wheel structure 100 according to the torque wrench of FIG. 1 applied to a torque wrench 200 is shown. In the second embodiment, the acoustic wheel structure 100 of the torque wrench is received in the hollow grip 210 of the torque wrench 200 and is abutted against the drive rod 220 of the torque wrench 200 by the roller 120. When the driving head 230 of the torque wrench 200 is twisted by force, the driving rod 220 and the roller 120 are pivoted to the top, and when the driving head 230 is subjected to a predetermined torque, the driving rod 220 is forced to the hollow grip. The 210 side is offset and is separated from the top of the roller 120 (refer to Fig. 3).

When the driving rod 220 is disengaged from the roller 120, the acoustic wheel structure 100 is easily shaken in the hollow grip 210, resulting in insufficient stability of the torque wrench 200, and easy to affect the functionality and life.

Therefore, with reference to FIG. 4, an exploded view of the acoustic wheel structure 100 of the torque wrench of FIG. 1 is illustrated. In the acoustic wheel structure 100 of the torque wrench provided in the present disclosure, the length L and the diameter R ratio of the acoustic wheel housing 110 are between 1.5 and 2.1, and the diameter r of the positioning rod 130 is between 3.2 mm and 4.8 mm.

Reference is made to Table 1 below, which is a comparison table of the embodiment and the comparison force of one embodiment.

As can be seen from the above list 1, when the diameter R of the swash wheel base 110 is the same, the length L of the slewing wheel body 110 of the embodiment is larger than the length L of the horn body of the comparative example, that is, the L/R of the embodiment (the pulsator seat) The length L of the body 110 and the diameter R ratio are larger than the L/R of the comparative example. Thus, the rate at which the phonophone body 110 of the embodiment sways in the hollow grip 210 will be less than the rate at which the volar wheel body of the comparative example sways in the hollow grip 210. In other words, the acoustic wheel base body 110 of the embodiment has a longer length, and the angle of the swaying is smaller in the hollow grip 210 having the same inner diameter than that of the acoustic wheel base of the comparative example, and the stability is relatively high.

As for the positioning rod 130, the diameter of the positioning rod 130 of the embodiment is larger than the diameter of the positioning rod of the comparative example, and the result of the fatigue test under the same material condition shows that the diameter of the positioning rod 130 is relatively long due to the embodiment. The fatigue test results are better and the service life is relatively longer.

In summary, in the acoustic wheel structure 100 of the torque wrench of the present disclosure, the stability of the acoustic wheel base 110 in the torque wrench 200 is improved by increasing the ratio of the length to the diameter of the acoustic wheel base 110, thereby avoiding the torque wrench 200. During use, it is affected by the shaking of the wheel body 110. In addition, in the present disclosure, the length of the diameter of the positioning rod 130 is further increased to enhance the overall service life of the acoustic wheel structure 100.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100. . . Acoustic wheel structure

110. . . Acoustic wheel body

111. . . Slot

120. . . Wheel

130. . . Positioning rod

200. . . Torque wrench

210. . . Hollow grip

220. . . Drive rod

230. . . Drive head

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.

1 is a perspective view showing a structure of a sound wheel of a torque wrench according to an embodiment of the present invention.

2 is a cross-sectional view showing the application of the acoustic wheel structure of the torque wrench according to FIG. 1 to a torque wrench.

Figure 3 is a cross-sectional view showing the application of the acoustic wheel structure of the torque wrench according to Figure 1 to a torque wrench.

Fig. 4 is an exploded view showing the structure of the acoustic wheel of the torque wrench of Fig. 1.

100. . . Acoustic wheel structure

110. . . Acoustic wheel body

111. . . Slot

120. . . Wheel

130. . . Positioning rod

Claims (5)

The sound wheel structure of a torque wrench comprises: a sound wheel base body, which is a cylinder body and has a groove body at one end, and the ratio of the length to the diameter of the sound wheel seat body is between 1.5 and 2.1; a groove body of the sound wheel body; and a positioning rod for piercing the sound wheel body and the roller, so that the roller is pivoted at one end of the sound wheel body, and the diameter of the positioning rod is between 3.2 Between mm and 4.8 mm. The acoustic wheel structure of the torque wrench of claim 1, wherein the length to diameter ratio of the acoustic wheel base is 2.0. The acoustic wheel structure of the torque wrench of claim 1, wherein the positioning rod has a diameter of 3.45 mm. The acoustic wheel structure of the torque wrench of claim 1, wherein the acoustic wheel base is a solid cylinder. The acoustic wheel structure of the torque wrench of claim 1, wherein the acoustic wheel base is a hollow cylinder.