SU1595636A1 - Torque indicating wrench - Google Patents

Abstract

The invention relates to mechanical engineering and can be used when tightening threaded connections with a torque torque. The purpose of the invention is the expansion of technological capabilities, improving accuracy and ease of operation. When tightening the threaded joint, the rolling body 10 falls on the jamming surface 12 of the groove 5 of the housing 1, as a result of which the working head 6 is wedged and rotates in one piece with the handle 2. As the torque increases, the rolling body 10 moves along thereby causing the deformation of the elastic beam 3, which by the protrusion 4 deforms the ring 7, the deformation of which is measured by the reading mechanism 8 by means of the rod 9. The torque value can be changed by using different sections of the ring 7 or Container material from which it is made. 2 Il.

Description

The invention relates to mechanical engineering and can be used when tightening threaded connections with torque torque,

The aim of the invention is to expand technological capabilities, improve accuracy and ease of operation by making the base of the handle in the form of an elastic cantilever beam.

Fig, 1 shows a torque wrench, a general view; in fig. 2 is a view A of FIG. 1.

The torque wrench includes a housing 1 with a handle 2, made in the form of an elastic beam 3 with a protrusion 4 and a groove 5. The working head 6 and a dynamometric spring in the form of a ring 7 are rotatably placed in the case, and on the handle 2 opposite to the ring 7 is mounted from - a counting mechanism 8 with a rod 9. The torque wrench is provided with a rolling body 10 installed in the groove 5 of the housing 1 and pressed with a spring 11 in a circumferential direction toward the surface 12 of the wedging of the groove 5 of the housing 1 to interact with the beam 3 and the working head 6. Ring 7 interacts with the projection beam 4 and the rod 3 9 measuring indicator mechanism 8. The resilient beam 3 can also have on its outer surface additional projections 13, which can be performed peremeschayuschimis radially, e.g., in the form of cams, providing provisional deformation of the ring 7.

The torque wrench works as follows.

When the threaded joint (not shown) is tightened, the rolling body 10 falls on the jamming surface 12 of the groove 5, as a result of which the operating head 6 is wedged and rotates in one piece with the housing 1. As the torque increases, the rolling body 10 moves further along the surface 12 seizure, causing deformation of the elastic beam 3, which, in turn, by the protrusion 4 deforms the dynamometric spring in the form of ring 7. The deformation of the ring 7 is measured by the reading mechanism 8 using a rod 9, for example, a dial indicator, the scale of which can be calibrated in units of torque. The greater the moment, the greater the deformation of the elastic beam 3, and hence of the ring t. The magnitude of the maximum load moment can be changed by using different sizes of sections of the ring 7, and also by changing the number of rings or the material from which they are made. If the protrusions 13 are moved in the radial direction in the form of eccentrics, then due to the preliminary deformation of the ring 7, the range of tightening moments can also be changed. Since after rolling the body 10, the rolling body 10 is held between the elastic protein 3 and the working head 6 due to friction, the deformation of the elastic beam 3 and, consequently, the readings of the reading mechanism 8 remain after the force is removed from the handle 2, which allows you to read readings in a convenient position.

The proposed torque

the key can work as a limiting one, while the magnitude of the limiting moment corresponds to the magnitude of the force caused by the maximum possible deformation of the elastic beam 3 and ring 7 multiplied by

radius of the working head 6. When the limiting moment is reached, the resistance to the pulling force does not decrease, and this increases the safety hazards.

If a stop (not shown) is brought to the protrusion 4, then the deformation of the elastic beam 3 will be eliminated, the head 6 will jam and the amount of tightening torque will be determined by the force of the locksmith's hand. This can be applied in the case when the torque wrench is used as a normal wrench.

The deformation of the elastic beam 3 arises only from the radial component force applied to the handle 2, which greatly improves the measurement accuracy, especially when tightening connections in hard-to-reach places where it is convenient to work with this key due to its performance with a small displacement (amplitude) handles 2.

Claims (1)

The invention of the torque wrench, comprising a housing with a handle and a torque spring, housed in a housing with the possibility of rotation of the working head mounted on the handle opposite to the torque spring reading mechanism with a rod, characterized in that, in order to expand technological capabilities, increase accuracy and ease of operation, the body is designed as an elastic beam with a protrusion and a groove, a dynamometric spring - in ring shape for engagement with protrusion and stem the readout mechanism, and the key is provided with a rolling body placed in the groove of the housing to interact with the elastic beam and the outer side surface of the working head. In id 11 10 um five / l h Fi8.2