CN203490021U

CN203490021U - Twisting balance mechanism

Info

Publication number: CN203490021U
Application number: CN201320550634.5U
Authority: CN
Inventors: 岳二英
Original assignee: Shanghai UB Machinery Co Ltd
Current assignee: Shanghai UB Machinery Co Ltd
Priority date: 2013-09-05
Filing date: 2013-09-05
Publication date: 2014-03-19
Anticipated expiration: 2023-09-05

Abstract

The utility model relates to a balance mechanism for measuring a torque value of a torque wrench on a torque test frame, especially a twisting balance mechanism which is disposed under a test frame sensor. The mechanism comprises a sensor, a main supporting plate, and a transition plate which is connected with the sensor. The center of the main supporting plate is provided with a projection. A plurality of through holes are uniformly distributed at the periphery of the projection. The diameter of a circle, which is formed by connecting the centers of the through holes, is less than that of the outer profile of the bottom surface of the transition plate. The interior of each through hole is provided with a steel ball jacked by a spring. The bottom of the spring is jacked by an adjusting screw, thereby enabling the steel ball to elastically extend out of the upper surface of the main supporting plate. The center of the transition plate is provided with a central hole. The projection of the main supporting plate extends into the central hole, thereby enabling the upper surface of the main supporting plate to contact with the lower surface of the transition plate and to be jacked by the steel ball. The balance device provided by the utility model prevents the sensor from being affected by an axial change of torque, and improves the measurement accuracy of the test frame.

Description

Twisting balanced controls

Technical field

The utility model relates to the balanced controls of measuring torque spanner torque value on a kind of torsional test frame, especially a kind of twisting balanced controls.

Background technology

While measuring torque spanner torque value on torsional test frame, tend to, because torque spanner and sensor baseplane do not have keeping parallelism, during the application of force, cause that sensor is subject to axial bending moment, make measured value inaccurate.

In torque sensor, as Fig. 4 sensor rigid body is only subject to torsional forces effect schematic diagram, under torque spanner effect, sensor rigid body is subject to moment of torsion to produce torsion angle 91, the deformation of its foil gauge spreads out of by signal wire 92, conventionally wish that sensor rigid body is only subject to twisting resistance effect, the signal that the foil gauge of guarantee sensor transmits is like this accurate.As Fig. 5 sensor rigid body is subject to, as shown in moment of torsion and axial bending moment effect schematic diagram, when sensor is also subject to axial bending moment, can disturb the output signal of foil gauge, affect the accuracy of torque signal.

Summary of the invention

Technical problem to be solved in the utility model is; A kind of twisting balanced controls are provided, and while measuring torque spanner moment of torsion to overcome on torsional test frame, sensor is subject to axial bending moment impact, improves the measurement accuracy of testing jig.

Technical matters of the present utility model solves by following technical proposals: a kind of twisting balanced controls, be located at testing jig sensor below, and comprise sensor, main supporting plate, the rebound being connected with sensor, wherein:

There is a projection at described main supporting plate center, at a plurality of through holes of being evenly distributed in of projection, the diameter of a circle being linked to be by through hole center is less than the bottom surface gabarit of rebound, is equipped with the steel ball of being supported by spring in each through hole, spring bottom is supported by set screw, makes steel ball elasticity stretch out main splint upper surface;

Described rebound center is provided with center pit, and the projection of main supporting plate stretches in center pit, makes main splint upper surface contact and be supported by steel ball with rebound lower surface.

Principle of work of the present utility model is: when sensor is subject to axial moment of flexure, and Elastic Steel club its bending moment of balance in balanced controls, thus make sensor itself not affected by bending moment, improve the precision of sensor passes torque signal.

On such scheme basis, at described protruding more than three through hole that is evenly distributed in, via count is as three, four, six, eight, ten etc.

On such scheme basis, the autonomous supporting plate of described set screw bottom surface is stretched in through hole.While just filling, by the elasticity of set screw, adjust the horizontality of sensor.

On such scheme basis, described rebound is fixed by screws on sensor basal surface.

Superiority of the present utility model is: by this balance device, overcome sensor and be subject to axial bending moment impact, improved the measurement accuracy of testing jig.

Accompanying drawing explanation

Accompanying drawing 1, twisting balanced controls decomposition texture schematic diagram;

Accompanying drawing 2, elastic steel ball is at six elastic steel ball schematic diagram of distribution of protruding periphery;

Accompanying drawing 3, when being subject to axial bending moment and affecting for sensor, the stressed variation schematic diagram of elastic steel ball, wherein, Fig. 3-1 is the stressed spring-compressed schematic diagram that makes of right side elastic steel ball; Fig. 3-2 are stressed schematic diagram when even of each elastic steel ball; Fig. 3-3 are the stressed spring-compressed schematic diagram that makes of left side elastic steel ball;

Fig. 4 sensor rigid body is only subject to torsional forces effect schematic diagram;

Fig. 5 sensor rigid body is subject to moment of torsion and axial bending moment effect schematic diagram.

Attached number in the figure explanation:

1---sensor;

2---rebound; 21---center pit;

3---main supporting plate; 31---projection; 32---through hole;

321,322,323,324,325,326---through hole one, through hole two, through hole three, through hole four; Through hole five, through hole six;

4---steel ball;

41,42,43,44,45,46---steel ball one, steel ball two, steel ball three, steel ball four, steel ball five, steel ball six;

5---spring;

51,52,53,54,55,56---spring one, spring two, spring three, spring four, spring five, spring six;

6---set screw;

61,62,63,64,65,66---set screw one, set screw two, set screw three, set screw four, set screw five, set screw six;

71,72---screw one, screw two;

8---torque spanner;

91---torsion angle; 92---signal wire.

Embodiment

As shown in accompanying drawing 1 twisting balanced controls decomposition texture schematic diagram, a kind of twisting balanced controls, are located at testing jig sensor below, comprise sensor 1, main supporting plate 3, the rebound 2 being connected with sensor 1, wherein:

There is a projection 31 at described main supporting plate 3 centers, a plurality of through holes 32 that are evenly distributed in projection 31, the diameter of a circle being linked to be by through hole 32 center is less than the bottom surface gabarit of rebound 2, in each through hole 32, be equipped with the steel ball 4 of being supported by spring 5, spring 5 bottoms are supported by set screw 6, make steel ball 4 elasticity stretch out main supporting plate 3 upper surfaces;

Described rebound 2 centers are provided with center pit 21, and the projection 31 of main supporting plate 3 stretches in center pit 21, make main supporting plate 3 upper surfaces contact and be supported by steel ball 4 with rebound 2 lower surfaces.

Described set screw 6 autonomous supporting plate 3 bottom surfaces are stretched in through hole 32.

Described rebound 2 is fixed on sensor 1 basal surface by screw one, 2 71,72, while just filling, by the elasticity of set screw 71,72, adjusts the horizontality of sensor 1, makes sensor 1 reach the equilibrium state as shown in Fig. 3-2.

If Fig. 2 is as shown in six elastic steel ball schematic diagram of protruding peripheral distribution, six through holes that are evenly distributed in projection 31, are respectively through hole 1, through hole 2 322, through hole 3 323, through hole 4 324; Through hole 5 325, through hole 6 326; Corresponding steel ball 1, spring 1, the set screw 1 of all packing in each through hole, steel ball 2 42, spring 2 52, set screw 2 62, steel ball 3 43, spring 3 53, set screw 3 63, steel ball 4 44, spring 4 54, set screw 4 64, steel ball 5 45, spring 5 55, set screw 5 65, steel ball 6 46, spring 6 56 and set screw 6 66.

If Fig. 3 is that sensor is when being subject to axial bending moment and affecting, shown in the stressed variation schematic diagram of elastic steel ball, torque spanner 8 is installed on sensor 1, after torque spanner 8 rotations, sensor 1 can be subject to axial moment of flexure, as Fig. 3-1 is depicted as the stressed spring-compressed schematic diagram that makes of right side elastic steel ball, now excessively plate pushes steel ball 2 42, spring 2 52 shrinks, set screw 2 62 invariant positions, spring 2 52 is owing to being under pressure after extruding, generation is due to set screw 2 62 invariant positions, so produce elastic force upwards, thereby the bending moment that utilizes steel ball 2 42 balances to be produced by torsion, thereby the equilibrium position that sensor 1 is reached as shown in Fig. 3-2 itself, each steel ball stress equalization, make sensor 1 not affected by bending moment, improve the precision of sensor 1 transmitting torque signal.

In like manner, Fig. 3-3 are the stressed spring-compressed schematic diagram that makes of left side elastic steel ball, now excessively plate pushes steel ball 5 45, spring 5 55 shrinks, set screw 5 65 invariant positions, spring 5 55 is owing to being under pressure after extruding, generation is due to set screw 5 65 invariant positions, so produce elastic force upwards, thereby the bending moment that utilizes steel ball 5 45 balances to be produced by torsion, thereby the equilibrium position that sensor 1 itself is reached as shown in Fig. 3-2, each steel ball stress equalization, make sensor 1 not affected by bending moment, improve the precision of sensor 1 transmitting torque signal.

Claims

1. twisting balanced controls, are located at testing jig sensor below, comprise sensor, main supporting plate, the rebound being connected with sensor, it is characterized in that:

2. twisting balanced controls according to claim 1, is characterized in that: at described protruding more than three through hole that is evenly distributed in.

3. twisting balanced controls according to claim 1, is characterized in that: the autonomous supporting plate of described set screw bottom surface is stretched in through hole.

4. twisting balanced controls according to claim 1, is characterized in that: described rebound is fixed by screws on sensor basal surface.