CN114279630A - An electric leveling torque verification device - Google Patents

Abstract

The invention discloses an electric leveling torque calibrating device which comprises an electric leveling mechanism fixed on a rack, wherein the output end of the electric leveling mechanism is connected with the rear end of a detected sensor and the front end of the detected sensor is connected with a calibrating rod assembly through a square tenon and a square hole; the electric leveling mechanism comprises a motor, a speed reducer, a transmission shaft and a transfer shaft which are coaxially connected in sequence in a transmission manner; the motor is connected with a motor controller and an electronic hand wheel through a cable; the verification rod assembly comprises a verification rod, a steel wire rope, a hanging rack and weights. According to the invention, through the arranged electric leveling mechanism, the force arm error caused by the gap between the detected sensor and the verification rod is avoided under the state that the verification rod is loaded with weights, the standard torque value applied to the detected sensor by the verification device is ensured, and the verification result precision is improved.

Description

An electric leveling torque verification device

technical field

The invention belongs to a verification device, relates to a torque verification device, and specifically relates to an electric leveling torque verification device.

Background technique

At present, one of the verification methods for torque sensors is to use levers to apply weights for verification. The principle of the weight detection method for levers is: torque = effective arm × force perpendicular to the effective arm. Corresponding to the structure of the verification device, one end of the sensor is connected to the shaft of the verification rod vertically through a square hole and a square falcon, and a weight is applied to one end of the verification rod. The standard torque value is calculated by the weight of the weight and the length of the verification rod. Then compare the standard torque value with the torque value displayed on the digital display connected to the tested torque sensor to obtain the verification result. Since the standard torque value is obtained by the effective arm × the weight of the weight, the accuracy of the standard torque value is guaranteed by the accuracy of the weight of the weight and the length of the effective arm. The weight of the weight and the rod length of the verification rod can be measured to ensure its accuracy. However, in the verification process, since one end of the sensor and the shaft of the verification rod are usually inserted through the square hole and the square falcon to transmit the torque, and the connection between the square hole and the square falcon will inevitably have a certain gap, so the verification rod After the weight is applied to the one end of the device, due to the influence of the gap, the verification rod will inevitably tilt to the end where the weight is applied. In addition, because the force application direction of the weight is always vertically downward, the tilting of the verification rod will cause it to be non-perpendicular to the force application direction of the weight, thereby causing the actual effective arm error. It will eventually lead to an error in the standard torque value, and the accuracy of the sensor verification result cannot be guaranteed.

SUMMARY OF THE INVENTION

In view of this, the present invention provides an electric leveling torque verification device, which can re-adjust the verification rod to the level through the leveling mechanism, thereby eliminating the error of the effective arm.

The technical scheme adopted by the present invention is: an electric leveling torque verification device, which is characterized in that it comprises an electric leveling mechanism fixed on the frame, and the output end of the electric leveling mechanism is connected with the rear end of the detected sensor, The front end of the detected sensor is connected with the verification rod assembly; both ends of the detected sensor are provided with square holes;

The electric leveling mechanism includes a motor, a reducer, a transmission shaft and an adapter shaft that are connected by coaxial transmission in sequence; the front end of the adapter shaft is a square falcon, which is connected with the square hole at the rear end of the detected sensor; the The motor is connected with a motor controller and an electronic handwheel through a cable;

The verification rod assembly includes a verification rod, a steel wire rope, a hanger and a weight; the middle rod body of the verification rod is provided with a square falcon, which is connected with the square hole at the front end of the detected sensor, and the hanger is connected to the verification rod through the wire rope. One end of the rod is connected and the weight is placed on the hanger.

Further, the motor and the reducer, the reducer and the transmission shaft are all connected by a square falcon and a square hole, and the transmission shaft and the transfer shaft are connected by a flat key.

Further, the electric leveling mechanism is fixed on the frame, and the frame includes four vertical panels; , the output end of the electric leveling mechanism is suspended horizontally.

Further, the rod lengths on both sides of the falcon above the verification rod are not equal, and the end of the rod with the shorter length is provided with a counterweight.

The beneficial effect of the present invention is that: through the set electric leveling mechanism, when the verification rod is loaded with weights, the force arm error caused by the gap between the detected sensor and the verification rod is avoided, and the verification is guaranteed. The standard torque value applied by the device to the detected sensor improves the accuracy of the verification result.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present invention.

Figure 2 is an exploded view of the structure of the electric leveling mechanism of the present invention.

FIG. 3 is a schematic view of the structure of the verification assembly of the present invention.

In the picture: 1. Electric leveling mechanism, 101. Motor, 102. Reducer, 103. Transmission shaft, 104. Frame, 105. Bearing, 106. Flat key, 107. Bracket, 108. Adapter shaft; 2. Verification rod Components, 201. Verification rod, 202. Steel wire rope, 203. Hanger, 204. Weight, 205. Fang Falcon, 206. Counterweight; 3. Sensor to be detected, 4. Electronic handwheel, 5. Motor controller.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 , the electric leveling torque verification device includes an electric leveling mechanism 1 , a detected sensor 3 installed at the output end of the electric leveling mechanism 1 , and a verification rod assembly 2 that provides torque for the detected sensor 3 .

As shown in FIGS. 1-2 , the electric leveling mechanism 1 is composed of a motor 101 , a reducer 102 , a transmission shaft 103 , a frame 104 , a bearing 105 , a flat key 106 , a bracket 107 and an adapter shaft 108 .

The side panel surface of the frame 104 is fastened to the bracket 107 by screws.

The motor 101 and the reducer 102 are connected and driven through a shaft. The body of the reducer 102 is fixed to the rear end of the frame 104 by screws.

A hexagonal nut is fixed on the body of the output end of the reducer 102, and the output shaft of the reducer 102 passes through the hexagonal nut. A hexagonal hole is provided on the rear side plate of the frame 104 , the hexagonal nut of the reducer 102 is clamped in the hexagonal hole, and the output end of the reducer 102 protrudes from the hexagonal hole to the other side of the frame 104 . The cooperation of the hexagonal nut of the reducer 102 and the hexagonal hole on the frame 104 can ensure that the output shaft of the reducer 102 is always kept in a horizontal state, and will not be inclined downward under the action of gravity.

The output shaft of the reducer 102 is the output square. The rear end of the transmission shaft 103 is provided with a corresponding square hole, which is connected with the output square of the reducer 102 . The output square falcon cooperates with the square hole to transmit torque. The shaft body of the transmission shaft 103 is connected with the front side plate surface of the frame 104 through the bearing 105 . The bearing 105 is clamped on the front side plate of the frame 104 .

The front end of the transmission shaft 103 is provided with a key groove, and a flat groove 106 is provided in the key groove. The rear end of the transfer shaft 108 is provided with a corresponding keyway, which is connected with the flat key 106 at the front end of the transmission shaft 103 for transmitting torque. The front end of the transfer shaft 108 is provided with a square falcon, and the square falcon is used to connect and cooperate with the rear end of the detected sensor 3 .

The electric leveling mechanism 1 is driven by the motor 101, and transmits the torque to the reducer 102. The output square at the front end of the reducer 102 transmits the torque to the transmission shaft 103, and the transmission shaft 103 transmits the torque to the transfer shaft 108 through the flat key 106. Finally, torque is output to the detected sensor 3 from the adapter shaft 108 .

As shown in FIG. 1 , the frame 1 is provided with an electronic handwheel 4 and a motor controller 5 . The electronic handwheel 4, the motor controller 5 and the motor 101 are connected by cables. The operator rotates the electronic handwheel 4 to operate the moving angle of the motor 101 through the motor controller 5 .

As shown in FIG. 3 , the verification rod assembly 2 is composed of a verification rod 201 , a wire rope 202 , a hanger 203 and a weight 204 , and a square falcon 205 is arranged in the middle of the verification rod 201 . The front end of the detected sensor 3 is docked with the Fang Falcon 205 . After the verification rod 201 is connected to the detected sensor 3 , it should be in a horizontal state in a natural state without the torque applied by the weight 204 . If the Falcon 205 is used as the pivot point, the length of one side of the verification rod 201 is longer than that of the other side. It is only necessary to set the corresponding counterweight 206 at the end of the rod with the shorter length to level the verification rod 201 . The wire rope 202 is connected to one end of the verification rod 201 . The hanger 203 hangs on the wire rope 202 and hangs down naturally. The weight 204 is mounted on the hanger 203 for torque loading.

1-3 to further illustrate the working process, when the rear end of the detected sensor 3 is installed on the square falcon of the adapter shaft 108, the square falcon 205 in the middle of the verification rod 201 is inserted into the square hole at the front end of the detected sensor 3. At this time, the weight 204 is loaded on the hanger 203 . Since the detected and detected sensor 3 and the verification rod 201 are connected to the square falcon 205 through the square hole, in an ideal state, even if the weight 204 is loaded on one end of the verification rod 201, the verification rod 201 should be kept horizontal and in contact with the weight 204. The direction of gravity is vertical. However, due to the inevitable gap between the square hole of the detected sensor 3 and the square hole 205 in the middle of the verification rod 201, the verification rod 201 will be inclined at a certain angle towards the gravity direction of the weight 204 around the center of the detected sensor 3, causing the verification rod 201 is not perpendicular to the direction of the force, which would cause an error in the standard torque value. The steering of the motor 101 can be adjusted by rotating the electronic handwheel 4, and then the torque is transmitted through the leveling mechanism 1, so that the verification rod 201 is slowly rotated to the horizontal until the gravity direction of the weight 204 is perpendicular to the verification rod 201, which eliminates the need for arm error.

The present invention is a torque sensor verification device with an electric leveling mechanism 1. By electrically adjusting the horizontal state of the verification rod 201, the force arm error caused by the non-levelling of the verification rod 201 is reduced, thereby affecting the standard torque value applied to the sensor and improving the verification accuracy.

Claims (4)

1. The utility model provides an electronic leveling moment of torsion calibrating installation which characterized in that: the device comprises an electric leveling mechanism fixed on a rack, wherein the output end of the electric leveling mechanism is connected with the rear end of a detected sensor, and the front end of the detected sensor is connected with a detection rod assembly; square holes are formed in the two ends of the sensor to be detected;

the electric leveling mechanism comprises a motor, a speed reducer, a transmission shaft and a transfer shaft which are coaxially connected in sequence in a transmission manner; the front end of the transfer shaft is provided with a square falcon which is connected with a square hole at the rear end of the sensor to be detected; the motor is connected with a motor controller and an electronic hand wheel through a cable;

the detection rod assembly comprises a detection rod, a steel wire rope, a hanging frame and weights; examine the middle pole body of deciding the pole and be equipped with the side falcon, with the square hole that is detected the sensor front end is connected, the stores pylon passes through wire rope and is connected with the one end of examining the pole, and the weight is placed on the stores pylon.

2. The electric leveling torque verification device as claimed in claim 1, wherein: all connect through side falcon and square hole between motor and speed reducer, speed reducer and the transmission shaft, be connected through the parallel key between transmission shaft and the change shaft.

3. The electric leveling torque verification device as claimed in claim 1, wherein: the electric leveling mechanism is fixed on the frame, and the frame comprises four vertical plate surfaces, namely a front vertical plate surface, a rear vertical plate surface, a left vertical plate surface, a right vertical plate surface, a left vertical plate surface and a right vertical plate surface; the electric leveling mechanism is fixedly penetrated on the front and rear plate surfaces of the frame, the side surface of the frame is fixed on the vertical rack, and the output end of the electric leveling mechanism is horizontally suspended.

4. The electric leveling torque verification device as claimed in claim 1, wherein: the pole length inequality of the both sides of examination pole top falcon, that end that the pole length is shorter is equipped with the balancing weight.

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