CN112326106B

CN112326106B - Standard torque spanner

Info

Publication number: CN112326106B
Application number: CN202011010133.9A
Authority: CN
Inventors: 尚廷东
Original assignee: Henan Niupa Institute of Mechanical Engineering
Current assignee: Henan Niupa Institute of Mechanical Engineering
Priority date: 2019-09-24
Filing date: 2020-09-23
Publication date: 2022-05-20
Anticipated expiration: 2040-09-23
Also published as: CN112326106A

Abstract

The invention relates to a standard torque wrench, which comprises a wrench and a standard torque sensor, wherein one end of the standard torque sensor is an instrument connecting end used for being connected with an instrument to be tested, the other end of the standard torque sensor is in transmission connection with the wrench, a connecting hole which is coaxial with the standard torque sensor is formed in the wrench, and a supporting sleeve of which the bottom is used for supporting a supporting surface is connected to the hole wall of the connecting hole through a first bearing. The invention solves the technical problem that when a standard torque wrench is used for calibrating a detected instrument in the prior art, a torque sensor of the detected instrument is easy to be subjected to vertical deflection acting force given by the wrench, so that the indicating value is not accurate.

Description

Standard torque spanner

Technical Field

The invention relates to a standard torque wrench in the field of calibration and verification.

Background

The standard torque wrench is a device for directly calibrating a torque sensor or calibrating a torque sensor in some tools, and the existing standard torque wrench is a "standard torque wrench" disclosed in chinese patent CN202582833U, and includes a torque applying arm, a sensor, i.e. a standard sensor, and a connector of an instrument to be tested, and the sensor includes an upper connector connected to the torque applying arm, a strain sensing area, and a lower connector for connecting to the connector of the instrument to be tested. The standard sensor is a torque sensor with higher precision than a torque sensor in a detected instrument, an upper joint and a lower joint are used for transmitting torque, and a strain sensing area acted by a torque difference between the upper joint and the lower joint generates strain so as to measure the torque.

When the device is used, the connector of the detected device is connected with the detected device, the torque applying arm applies torque to the detected device through the sensor and the connector of the detected device, and the device is calibrated by comparing the sensor indication value of the detected device with the indication value of the standard sensor.

The problems of the existing standard torque wrench are that: due to the force application problem of workers and the problems of fit tolerance and the like, the standard torque sensor is easily subjected to other deflection forces except torque, so that the calibration precision is influenced; if the torque sensor of the detected instrument is subjected to a bias force in other directions except for the torque given by the wrench, for example, a bias force in the vertical direction, the torque sensor of the detected instrument is subjected to the bias force and is easily subjected to inaccurate indication, and at this time, even if the indication value of the standard torque sensor is accurate, the accurate calibration of the detected instrument cannot be realized if the detected instrument cannot accurately indicate the value.

Disclosure of Invention

The invention aims to provide a standard torque wrench, which solves the technical problem that when the standard torque wrench is used for calibrating a detected instrument in the prior art, a torque sensor of the detected instrument is easily subjected to vertical deflection acting force given by the wrench, so that the displayed value is not accurate.

In order to solve the technical problems, the technical scheme of the invention is as follows:

the utility model provides a standard torque spanner, includes spanner and standard torque sensor, standard torque sensor's one end for being used for with the instrument link end that the instrument links to each other by examining, standard torque sensor's other one end is connected with the spanner transmission, be provided with on the spanner with the connecting hole that standard torque sensor coaxial line set up, be connected with the bottom through first bearing on the pore wall of connecting hole and be used for supporting the support cover on the holding surface.

The upper side of the connecting hole on the wrench is provided with a penetrating hole, the instrument connecting end of the standard torque sensor penetrates out of the penetrating hole, and a second bearing is arranged between the hole wall of the penetrating hole and the standard torque sensor.

The bottom of the support sleeve is provided with an everted support edge.

The standard torque sensor is vertically arranged, the lower end of the standard torque sensor forms the instrument connecting end, and the wrench is sleeved on the corrugated pipe outside the standard torque sensor through a coaxial line and connected with the upper end of the standard torque sensor.

The bearing outer ring of the first bearing is fixed on the wrench, and the bearing inner ring of the first bearing and the supporting sleeve are relatively prevented from rotating and can move up and down.

The first bearing has at least two, and each first bearing interval arrangement from top to bottom supports the cover periphery and ends to rotate through the keybar of vertical extension and is connected with the installation cover, and the installation cover supports the cover relatively and can reciprocate, and on the bearing inner race of first bearing was fixed in the spanner, the bearing inner race of first bearing was fixed in on the installation cover.

The invention has the beneficial effects that: when the torque display device is used, an operator holds the wrench, torque is applied to the standard torque sensor through the wrench, the standard torque sensor transmits the torque to a detected instrument, in the process that the operator holds the wrench, due to inexperienced operation or error conditions, the wrench is not pulled completely and horizontally, a vertical deflection acting force can be generated, the deflection acting force acts on the supporting sleeve through the first bearing and is transmitted to the supporting surface through the bottom of the supporting sleeve, and the phenomenon that the deflection acting force directly acts on the detected instrument to cause inaccurate torque display of the detected instrument is avoided.

Drawings

FIG. 1 is a state diagram of use of one embodiment of the present invention;

fig. 2 is a schematic structural view of the support sleeve of fig. 1.

Detailed Description

An embodiment of a standard torque wrench is shown in FIGS. 1-2: including the spanner 14 of level setting and the standard torque sensor 4 of vertical setting, the lower extreme of standard torque sensor is for being used for the instrument link end that links to each other with the instrument of examining, instrument link end in this embodiment is square tenon structure 6, the upper end of standard torque sensor is passed through bellows 3 and is connected with the 14 transmission of spanner, concretely, bellows 3 coaxial line sets up in the outside of standard torque sensor 4, bellows 3's upper end welded fastening has top connecting plate 2, top connecting plate 2 passes through the key piece 1 and links to each other with the standard torque sensor upper end, the lower extreme welded fastening of bellows 3 is on spanner 14, bellows are stainless steel corrugated metal pipe in this embodiment, say, the taixin TX-005 stainless steel corrugated pipe of the taixin bellows limited company of dui cheng city.

One end of the wrench adjacent to the standard torque sensor is provided with a connecting hole 19 which is coaxial with the standard torque sensor, the wrench is provided with a penetrating hole 5 on the upper side of the connecting hole, the instrument connecting end of the standard torque sensor penetrates out of the penetrating hole, a second bearing 16 is arranged between the hole wall of the penetrating hole and the standard torque sensor, specifically, the outer ring of the second bearing is fixed with the wrench, and the inner ring of the second bearing is fixed with the standard torque sensor.

The hole wall of the connecting hole is connected with a supporting sleeve 8 through a first bearing 11, the bottom of the supporting sleeve 8 is provided with an outward-turned supporting edge 9 used for supporting on a supporting surface 10, the supporting surface 10 is a fixed surface which can be a mounting surface used for fixing a detected instrument or a surface on a shell of the detected instrument, in the embodiment, the supporting surface 10 is a mounting surface used for fixing the detected instrument, in order to ensure that the deflection force of the spanner 14 in the vertical direction can be reliably transmitted to the supporting sleeve, the number of the first bearings 11 is two, the two first bearings are arranged at intervals up and down, the periphery of the supporting sleeve 8 is provided with a mounting groove 18, a plurality of key strips 17 which are distributed along the circumferential direction and extend in the vertical direction are arranged in the mounting groove 18, the upper end of the supporting sleeve 8 is fixed with a retaining ring 15 through a screw, the mounting sleeve 12 is assembled in the mounting groove 18 in a guiding and moving manner in the vertical direction, and the length of the mounting groove 18 in the vertical direction is longer than the height of the mounting sleeve 12, the retaining ring can restrict the upward movement limit of the mounting sleeve, and the mounting sleeve is provided with a key groove matched with the key strip, so that the mounting sleeve relatively supports the sleeve to stop rotating, but the mounting sleeve can move up and down relatively, the bearing inner ring of the first shaft 11 is fixed on the mounting sleeve, and the bearing outer ring of the first bearing is fixed on the wrench.

When the device is used, the detected instrument 7 is fixed on the installation surface 10, an operator can insert the lower end of the standard torque sensor 4 into the square tenon hole of the detected instrument by holding the wrench 14, the installation sleeve 12 can move up and down relative to the support sleeve 8, so that the square tenon insertion can be ensured to be in place, the support sleeve 8 can be ensured to be supported on the installation surface 10, and if the installation sleeve cannot move up and down relative to the support sleeve, the problem that the square tenon insertion is not in place when facing the square tenon holes with different heights or a certain distance exists between the support sleeve and the installation surface after the square tenon insertion is in place can occur. An operator holds a wrench by hand, applies torque to a standard torque sensor through the wrench, the torque is transmitted to a detected instrument through the standard torque sensor, and calibrates the detected instrument by comparing a torque indicating value of the detected instrument with the standard torque sensor; for the detected instrument, the inclined acting force of the wrench is transmitted to the supporting sleeve through the first bearing and then is offset by the mounting surface, so that the accurate indication of the standard detected instrument is avoided from acting on the torque sensor of the detected instrument, and when the detected instrument and the standard torque sensor can accurately indicate, the accuracy of calibration is improved.

In other embodiments of the invention: the corrugated pipe, the top connecting plate and the wrench can be fixed through screws; the second bearing can be omitted, and a gap is formed between the standard torque sensor and the wall of the through hole; the number of the first bearings is only one, and the bearing inner ring of the first bearing can directly move and be assembled on the support sleeve along the vertical direction in a guiding way and is in rotation stopping fit with the support sleeve; when the instrument to be detected is positioned at a certain distance from the square tenon hole to the installation surface, the height of the first bearing relative to the support sleeve can also be fixed, namely, the bearing inner ring of the first bearing is directly fixed on the support sleeve; according to different stress structures of the detected instrument, the instrument connecting end on the standard torque sensor can also be adjusted in an adaptive mode, for example, when the stress structure on the detected instrument is a square tenon head, the instrument connecting end can be a square tenon hole structure matched with the stress structure.

Claims

1. The utility model provides a standard torque spanner, includes spanner and standard torque sensor, standard torque sensor's one end for being used for with the instrument connection end that links to each other of examined the instrument, standard torque sensor's other one end is connected with the spanner transmission, its characterized in that: the wrench is provided with a connecting hole which is coaxial with the standard torque sensor, the hole wall of the connecting hole is connected with a supporting sleeve of which the bottom is used for supporting on a supporting surface through a first bearing, the bottom of the supporting sleeve is provided with an outward-turning supporting edge, the standard torque sensor is vertically arranged, the lower end of the standard torque sensor forms the instrument connecting end, the wrench is connected with the upper end of the standard torque sensor through a corrugated pipe which is coaxially sleeved on the outer side of the standard torque sensor, at least two first bearings are arranged at intervals up and down, the periphery of the supporting sleeve is connected with an installation sleeve in a rotation stopping mode through a vertically extending key strip, the installation sleeve can move up and down relative to the supporting sleeve, the outer bearing ring of each first bearing is fixed on the wrench, and the inner bearing ring of each first bearing is fixed on the installation sleeve.

2. The standard torque wrench of claim 1, wherein: the upper side of the connecting hole on the wrench is provided with a penetrating hole, the instrument connecting end of the standard torque sensor penetrates out of the penetrating hole, and a second bearing is arranged between the hole wall of the penetrating hole and the standard torque sensor.

3. A standard torque wrench as claimed in claim 1 or claim 2, wherein: the bearing outer ring of the first bearing is fixed on the wrench, and the bearing inner ring of the first bearing and the supporting sleeve are relatively prevented from rotating and can move up and down.