KR200286927Y1 - Apparatus for torque balance mechanism to draw back the torque arm level to a horizontal position in the torque calibration machine - Google Patents

Abstract

The present invention relates to a torque correction device, a feature of the present invention, a torque corrector installed on the support frame and coupled to the torque transmission shaft, the upper end of one side coupled to the torque transmission shaft and extends downward A torque lever, a worm wheel coupled to the other lower end of the torque lever, and a worm wheel mounted on an inside of a fixed bracket with an open bottom surface, and engaged with the worm wheel and inserted into a motor shaft, and fastened to one side and the other side of the support frame to a horizontal axis. Composed of a worm gear installed inside the support bracket forming the housing, the worm um gear and worm wheel is operated by the rotation of the motor shaft to rotate the torque transmission shaft coupled with the torque lever forward and reverse.

According to the present invention, by operating the torque lever to the left / right by the rotation of the motor, it is possible to reduce the power required for the rotation of the torque transmission shaft, improve the precision of the torque transmission shaft rotation control and further downsize the support transfer means.

Description

Apparatus for torque balance mechanism to draw back the torque arm level to a horizontal position in the torque calibration machine}

The present invention relates to a torque corrector for measuring torque by mounting a torque measuring device such as a torque cell, a load cell, a pressure transducer, and more particularly, a torque arm installed at one side of an upper part of a support frame and a torque of the other side of the upper part of the support frame. A torque measuring device is mounted between the couplings installed on the transmission shaft, and a torque lever is mounted to the torque corrector having a real load adding device at both ends of the torque arm for forward / reverse rotation of the coupling. After the worm wheel and the worm gear are fastened to the end, a motor is installed on the worm gear shaft to operate the torque lever left / right by the rotation of the motor to reduce the power required for the rotational movement of the torque transmission shaft and improve the precision of the rotation control. Furthermore, the present invention relates to a torque arm horizontal holding device of a torque corrector aiming at miniaturization of the support transfer means.

Torque calibrator is a device that calibrates torque meter by using torque measuring device and load device, and it uses real weight torque calibrator and hydraulic torque according to the use of weight whose weight is precisely calibrated by precision grade weight or by using torque converter which is precisely calibrated. Can be classified as calibrator.

5A and 5B are front and side views of a conventional actual load torque corrector.

As shown, the conventional torque corrector 100 is typically installed on the support frame 104, the reducer 126 fastened to the shaft of the motor 116 is installed on one side of the upper support frame 104 and the reducer ( The torque arm 102 is installed on a straight line facing the 126 and the torque measuring device is mounted between the speed reducer 126 and the torque arm 102, and the two ends of the torque arm 102 are suspended. The actual load adding device 138 is added. On the other hand, the displacement sensor is attached to the position close to the torque arm (102). The conventional torque corrector 100 is fixed to the reducer 126 and the torque arm 102, respectively, before and after both sides of the torque meter, and then the actual load is added to operate the torque arm 102 Apply the force of desired size at both ends and measure torque value of torque meter by converting torque value of torque meter into electric value by using transducer. The torque value is evaluated for accuracy based on a condition in which the torque arm 102 is accurately leveled. The speed reducer 126 generates a torque having the same magnitude as the torque value in order to increase the accuracy. At the same time, the feedback signal of the displacement sensor attached to the end of the torque arm 102 is precisely controlled by the motor 116 mounted on the reducer 126 so that the torque arm 102 is exactly horizontal.

As described above, the conventional large-capacity torque corrector 100 is manufactured by using a large precision reducer 126 and a large servo motor 116 without backlash as a counter torque generating drive device. In addition, since the support transfer means 124 formed on the support frame 104 is directly received the torque generated by the torque corrector 100 is precisely manufactured so that there is no play to maintain precision.

However, the above-described conventional torque corrector 100 should adjust the distance between the reducer 126 and the torque arm 102 in accordance with the size, length, weight, etc. of the torque measuring device, at which time the precision of the torque measuring device is inferior Disadvantages arise. In other words, the conventional torque corrector 100 requires a large force as the weight of the torque measuring device becomes heavy and the distance to be transferred increases as the size increases, so that a large-capacity reducer motor 116 should be used, and a support transfer The means 124 should be made large. In addition, the conventional torque corrector 100 has a risk that the support transfer means is distorted as it requires a large force when the large-capacity torque measuring instrument is mounted and calibrated, so as to prevent distortion of the transfer means. It must be made of metallic material, and precise manufacturing is necessary because of the speciality to be transferred while maintaining the correct shaft alignment. Accordingly, the conventional torque corrector 100 has a large production cost due to the large capacity of the reduction gear 126, the motor 116, and the large size of the support transfer means 124, and the production of the support transfer means by precise manufacture of the support transfer means. The processing cost is increased. In addition, the above-described conventional torque corrector 100 is usually used indoors, due to the large size of the conventional torque corrector 100 occupies a large indoor area. On the other hand, the user of the conventional torque corrector 100, when using the conventional torque corrector 100 is enlarged, it is inconvenient to the operation of the torque corrector 100 support transfer means, the precise horizontal of the support transfer means Since the process requires a movement, the work is burdened, and therefore, the user must have professionalism.

The present invention is to overcome the above-mentioned conventional problems, the present invention is equipped with a torque meter between the torque arm is installed on the upper side of the support frame and the coupling is installed on the torque transmission shaft on the other side of the upper support frame and And a torque lever for a rotational movement of the coupling to a torque corrector having a real load adding device at both ends of the torque arm, and fastening the worm wheel and the worm gear to the end of the torque lever, and then attaching the worm gear shaft to the worm gear shaft. The purpose of the present invention is to provide a means for rotating the torque transmission shaft of a torque corrector that installs a motor to operate the torque lever left / right by rotating the motor, thereby reducing the power required for the rotation of the torque transmission shaft and further miniaturizing the support transfer device.

In addition, the present invention is to install the worm gear and the motor of the worm shaft to the support bracket installed on the lower cross frame support, the support bracket is fastened so as to be transferred to the longitudinal support axis of the worm gear and the worm wheel meshing The purpose is to control the precise rotational movement of the torque transmission shaft by configuring not to deviate.

Figure 1a is a front view of the torque corrector according to the present invention,

Figure 1b is a side view of the torque corrector according to the present invention,

FIG. 2 is a cross-sectional view of FIG. 1B;

Figure 3 is a sectional view of the main part of the support bracket of Figure 1a,

4 is a cross-sectional view of main parts of the fastening part of FIG. 1A;

5a is a front view of a torque corrector according to the prior art,

Figure 5b is a side view of a torque corrector according to the prior art.

[Description of main part of drawing]

1,100 ... torque corrector 2,102 ... torque arm

4,104 ... support frame 6,106 ... torque transmission shaft

8 a, 8 b, 8 c, 108 ... coupling 10 ... torque lever

12 ... fixing bracket 14a ... worm wheel

14 b ... worm gear 16116 ... motor

20 ... Support bracket 22 ... Transfer rail

24,124 ... support transport 26,126 ... reducer

28a ... tightening screw hole 28b ... tightening screw hole

30,138 ... Actual load device 200 ... Torque gauge

In order to solve the above technical problem, a feature of the present invention, in the torque corrector (1) installed on the support frame (4) and coupled to the torque transmission shaft (6), the torque transmission shaft (6) Torque lever (10a) is coupled to the upper end of one side and extended downward, the worm wheel (14a) is mounted inside the fixed bracket 12 is coupled to the other end of the lower end of the torque lever 10, and the The worm gear 14b meshes with the worm wheel 14a and is inserted into the shaft of the motor 16, and is installed inside the support bracket 20 which is fastened to one side and the other side of the support frame 4 to form a housing in the horizontal axis. The worm wheel 14b and the worm wheel 14a are operated by the rotation of the shaft of the motor 16 so that the torque transmission shaft 6 coupled with the torque lever 10 is forward / reversely rotated. have.

The support frame 4 has a conveying rail 22 formed on an upper bottom thereof, and a torque transmitting shaft 6 formed in parallel with the conveying rail 22 above the conveying rail 22, and the torque transmitting shaft The upper portion is inserted into the shaft 6, the lower portion is composed of a torque shaft support transfer means 24 is coupled to the conveying rail 22 and the coupling 8a is mounted on the other surface. In addition, a torque arm 2 on which the coupling 8b is mounted is installed on the other side facing the coupling 8a mounted on the torque shaft support transfer means 24.

The interlocking structure of the worm gear 14b and the worm wheel 14a inside the support bracket 20 and the inside of the support bracket 20 will be described in more detail. First, the motor 16 is mounted on one side of the support bracket 20. The coupling structure of the shaft of the motor 16 is a general shaft coupling of the motor 16, the gear reducer 26 to reduce the high-speed rotation by lowering the gear ratio by engaging a predetermined number of gears to rotate the high-speed motor 16, the shaft is coupled Coupling with the reducer 26 is formed of a structure including a coupling 8c for transmitting the rotational force of the reducer 26 to the rotational force of a different property and the worm gear 14b coupled to the coupling and the coaxial. The support bracket 20 has a portion where the worm gear 14b is coupled to the open portion, the worm wheel 14a is fired, and a fixed bracket 12 having the lower surface inserted therein is inserted into the worm gear 14b and the worm wheel. It becomes the structure which (14a) meshes. In addition, the support bracket 20, which is fastened to the support frame 4 to form a housing laterally and the worm gear 14b is installed, may have a gap between the worm gear 14b and the worm wheel 14a. Therefore, the support frame 4 is fastened to be transferred to the longitudinal axis (up / down).

On the other hand, the transducer is mounted in the position close to the torque arm (2). The transducer is a current converter for converting a physical quantity into an electrical quantity, and in particular, a strain gauge is representative. The most widely used transducers using the strain gauges include load cells, pressure transducers, torque cells, accelerometers, and the like, and may be used as embodiments in the present invention.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the torque arm (2) horizontal holding device of the torque corrector 1 according to the present invention. 1A and 1B show front and side views of the torque arm 2 horizontal holding device of the torque corrector 1 according to the present invention.

1A and 1B, at both ends of the torque arm 2, a real load adding device 30 capable of generating a force from several hundred kilograms to several hundred kilograms is suspended below, and the actual load adding device ( If the 30 is to be operated to transmit the force to the torque arm (2) to generate a torque. At this time, the torque measuring device 200 mounted between the coupling 8a of the torque shaft support transfer means 24 and the coupling 8b of the torque arm 2 is subjected to torque, and the torque is transferred from the transducer. The amount of electricity is converted and displayed on a predetermined indicator.

On the other hand, since the size of the torque measuring device 200 is not determined, the coupling 8a and the fixed torque arm 2 mounted on the torque transmission shaft support transfer mechanism are installed using the torque transfer shaft support transfer mechanism. The gap between the couplings 8b should be widened or narrowed. The torque transfer shaft support transfer mechanism is coupled to the torque transfer shaft 6 to move forward / backward according to the torque gauge 200 length and the torque gauge detachable distance. Referring to FIG. 3, the operating principle of the torque transmission shaft 6, the torque lever 10, the worm wheel 14a and the worm gear 14b, and the torque lever 10 coupled with the motor 16 are described. Able to know.

As shown in FIG. 3, the torque lever 10 is mounted on the torque transmission shaft 6 so as to be exposed to the outside, and the worm wheel 14a is mounted on the fixed bracket 12 having the lower surface open. And mounted on the lower end of the torque lever 10, the worm gear 14b is engaged with the worm wheel 14a and coupled to the same axis as the motor 16, and is supported by the support frame 4 below the support frame. It is mounted inside the bracket 20, the speed reducer for converting the high speed motor 16 rotation to a low speed rotation using a predetermined gear ratio between the motor 16 and the worm gear 14b mounted inside the support bracket 20 26 and the coupling 8c are mounted.

When the motor 16 rotates at a high speed, the rotation of the shaft of the motor 16 is slowed by the reducer 26 using a predetermined gear ratio, and the worm gear 14b rotates due to the rotation. At this time, the worm gear (14b) and the worm wheel (14a) coupled to the fixed bracket 12 is engaged in a predetermined rotational movement around the torque transmission shaft and the torque lever mounted on the fixed bracket 12 10 transmits this rotational movement to the torque transmission shaft 6.

Based on the above-described structure, the present invention is based on worm's module = 3, pitch = module Xπ = 9.425, worm wheel pitch circle diameter = 1200, worm gear 14b pitch circle diameter = 62, worm wheel number = warm wheel pitch circle Diameter ÷ module = 400, reduction ratio = 1/400, lead angle of worm gear 14b = tan-1 (pitch / πX worm gear pitch circle diameter) = tan-1 (9.425 / πX62) = 2.77 °, maximum When 200kgf of actual load is added to the end of torque arm 2 of 2000mm in total length, the force transmitted through the torque lever 10 is F = actual load X (1/2 of torque arm length) ÷ (Warm wheel pitch diameter 1/2) = 200X (2000 ÷ 2) ÷ (1200 ÷ 2) = 333kgf, assuming that the worm's pressure angle is 20˚ and the friction coefficient is 0.1, the friction angle = tan-1 (friction coefficient ÷ cos pressure angle) = tan-1 (0.1 ÷ cos20) = 6.07˚. At this time, torque for driving worm gear shaft = FX tan (lead angle + friction angle) X (1/2 of worm gear pitch diameter) = 333Xtan (2.77 + 6.07) X (62 ÷ 2) = 1.6kgf.m. By reducing the transmission torque to 1/125 of the torque 200kgf.m, the system 16 and the manufacturing cost are greatly reduced due to the small capacity of the motor 16 and the reduction gear 26.

On the other hand, the worm gear 14b and the worm wheel 14a engaged in the support bracket 20 may be assumed to be pushed by a predetermined interval due to the pushing force. Therefore, the present invention has a fastening structure capable of adjusting the support bracket 4 up / down by using the fastening means of the support frame 4 and the support bracket 20. 4 shows a structure in which the support frame 4 and the support bracket 20 are fastened according to the present invention, and the upper and lower tightening screw holes 28a are formed longer than the diameter of the tightening screws 28b. It is a fastening structure capable of transferring the support bracket 20 fastened to the support frame 4 up / down. It will be obvious that the fastening structure may be modified in shape and structure without departing from the technical spirit of the present invention.

As described above, the torque arm horizontal holding device of the torque corrector according to the present invention is equipped with a torque lever for the rotational movement of the coupling on the torque transmission shaft of the torque corrector 1, the worm wheel and the end of the torque lever After tightening the worm gear, by installing a motor in the worm gear shaft to provide a forward / reverse rotation means of the torque transmission shaft torque transfer shaft for operating the torque lever left / right by the motor rotation to reduce the power required for rotation of the torque transmission shaft, Furthermore, the torque transmission shaft support transfer apparatus can be miniaturized. In addition, the present invention is to install the worm gear and the motor of the worm shaft in the support bracket installed on the lower side of the support frame, the support bracket is fastened so as to transfer to the support frame longitudinal axis is disengaged the engagement of the worm gear and the worm wheel It can be configured not to control precise rotational movement of torque transmission shaft. In addition, the present invention has a fastening structure capable of adjusting the height of the support bracket rolled up to the support frame, so that it is possible to more precisely calibrate the torque meter.

What has been described above is just one embodiment for implementing the torque arm horizontal holding device of the torque corrector according to the present invention, the present invention is not limited to the above-described embodiment, as claimed in the following utility model claims As described above, any person having ordinary knowledge in the field to which the present invention belongs without departing from the gist of the present invention will have a technical spirit of the present invention to the extent that various modifications can be made.

Claims (2)

In the torque corrector installed on the support frame and the coupling coupled to the torque transmission shaft, The upper end of one side is coupled to the torque transmission shaft and the lower end of the torque lever is fastened to the fixed bracket and the worm wheel mounted and mounted inside the fixed bracket, the fixed bracket is installed below the support frame It is fastened to one side and the other side of the support frame is inserted into the upper side of the support bracket that forms a housing in the horizontal side, the worm gear is engaged with the worm wheel inside the support bracket, the motor is installed on the worm gear shaft Torque gear leveling device of the torque corrector, characterized in that the worm gear and the worm wheel is rotated according to the rotation to operate the torque lever to the left and right. The method of claim 1, The support bracket is a torque arm horizontal maintenance device of the torque corrector, characterized in that fastening with a support frame and a fastening screw to enable position adjustment to the longitudinal axis of the support frame.