Turnout bolt torque measuring device

Abstract

The utility model discloses a measuring device for measuring the torque of a turnout bolt. The measuring device comprises an electric torque wrench, a torque transmission plate, a rotating cylinder and a counter-acting force arm. Wherein the electric torque wrench is provided with a continuously variable transmission and a liquid crystal display screen and is powered by a lithium battery. The torque transmission plate serves as a multi-stage speed reducer and transmits the torque of the continuously variable transmission to the rotating sleeve through the spline. And reaction force arms are designed on two sides of the torque transmission plate and are used for providing fulcrums for contact with the top surface of the rail bottom of the steel rail in the measurement process. And finally, torque measurement can be realized by matching and inserting the rotary sleeve and the turnout bolt and nut, and a measured value can be directly displayed on a liquid crystal display screen and can also be transmitted and displayed in a mobile equipment APP through Bluetooth. The device is light in weight, can be detachably installed, is convenient to calibrate and carry, is driven by a battery during measurement, is intelligent and digital, has low requirements for measurement personnel, is slow in torque loading during measurement, has no impact load, and is accurate in measurement result.

Description

Technical Field

[0001] This utility model relates to the field of railway measurement technology, specifically a device for measuring the torque of turnout bolts. Background Technology

[0002] With the rapid development of high-speed railways, the production quality requirements for high-speed turnouts are becoming increasingly stringent. In high-speed railway turnouts, various rail components, rail components and connectors, and pads and sleepers are all connected by bolts. The torque of different bolts must meet the technical requirements of standards and drawings, and torque testing is essential to ensure the dimensional stability and overall structural stability of the turnout frame. Currently, turnout manufacturers and quality control stations use torque wrenches to test bolt torque. These torque wrenches are very heavy, require large torques during measurement, and the impact force from the wrench leads to inaccurate measurements, making it difficult to accurately track the peak torque. This presents significant challenges to torque measurement. Therefore, the development of this utility model patent effectively solves these problems, enabling digital and intelligent testing of turnout bolt torque. Utility Model Content

[0003] The purpose of this invention is to provide a turnout bolt torque measuring device, which is convenient to carry, easy to use, and provides accurate measurement data, thus solving the problems of heavy weight, difficult operation, and low accuracy of existing measuring tools.

[0004] The present invention relates to a measuring device for measuring the torque of turnout bolts, comprising an electric torque wrench, a torque transmission plate, a rotating cylinder, and a reaction arm.

[0005] The torque transmission plate has a plate-like outer shell and serves as a reducer with internal transmission gears. The rear side wall of the torque transmission plate is fixedly mounted to the front end of the electric wrench. Simultaneously, the output end of the electric wrench is connected to the input shaft located below the interior of the torque transmission plate. A cylindrical hole is coaxially formed on the output shaft above the torque transmission plate, and a rotating cylinder is installed within this hole. The rotating cylinder is closed at its end, and its front end face has a coaxially designed hole for insertion into a nut that matches a turnout bolt. Thus, the torque output from the electric torque wrench is reduced and amplified by the torque transmission plate before being transmitted to the rotating cylinder.

[0006] Two rod-shaped reaction arms are symmetrically fixed on the left and right sides of the torque transmission plate. The upper part of the two reaction arms is a support section, which is inclined towards the outside of the torque transmission plate. The top of the reaction arms is used to contact the top of the rail to form a fulcrum when the rotating cylinder rotates the nut.

[0007] The advantages of this utility model are:

[0008] 1. This utility model of a turnout bolt torque measuring device can accurately measure the torque value of turnout bolts. It replaces the traditional manual drive with a belt drive, eliminating measurement errors caused by unstable loading, reducing the strength requirements of the measuring personnel, and reducing the difficulty of measurement. Furthermore, the design of a replaceable rotating cylinder meets the testing requirements of bolts of all specifications in turnouts, making it widely applicable.

[0009] 2. The turnout bolt torque measuring device of this utility model can be assembled together by splines, which ensures that there is no loss of torque during transmission and the measurement result is infinitely close to the true value. After assembly, it is connected by screws to maintain the stability of the overall structure. It can be installed and disassembled, making it convenient for calibration, packaging and carrying.

[0010] 3. The turnout bolt torque measuring device of this utility model adopts an automatic torque wrench with a built-in display screen. After the measurement is completed, the reading can be read directly, which is intuitive and convenient. It can also transmit the measurement results to the APP installed on the mobile device through the Bluetooth data transmission function, which is convenient for data review and storage.

[0011] 4. The overall structure of this utility model turnout bolt torque measuring device is designed according to the turnout detection space. The transmission device can export the bolt torque value in the limited space for detection. Through continuous optimization of the structure of each part and selection of materials, the overall quality of the equipment is controlled to a minimum while meeting the requirements of equipment use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the measuring device for measuring the torque of turnout bolts according to this utility model.

[0013] Figure 2 This is a schematic diagram of the initial state during the measurement process of the measuring device for measuring the torque of turnout bolts according to this utility model;

[0014] Figure 3 This is a schematic diagram of the fulcrum formation state during the measurement process of the measuring device for measuring the torque of turnout bolts according to this utility model.

[0015] In the picture:

[0016] 1-Electric torque wrench 2-Torque transmission plate 3-Rotating cylinder

[0017] 4-Reaction arm 101-Outer shell 102-Continuously variable transmission

[0018] 103-LCD display screen; 104-Lithium battery; 401-Steel sleeve Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] This utility model relates to a measuring device for measuring the torque of turnout bolts, comprising an electric torque wrench 1, a torque transmission plate 2, a rotating cylinder 3, and a reaction arm 4, as shown below. Figure 1 As shown.

[0021] The electric torque wrench 1 can be a REC-15 type lithium battery 104 digital display constant torque electric torque wrench, featuring a housing 101, a continuously variable transmission (CVT) 102, an LCD screen 103, a lithium battery 104, and a Bluetooth module. The upper part of the housing houses the drive motor of the CVT 102, with the output shaft of the drive motor connected to the input shaft of the CVT via a spline; the end of the CVT 102 is fixedly connected to the front end face of the upper part of the housing. The lower part of the housing is a shockproof handle, with the lithium battery 104 inserted and fixed at its bottom. The lithium battery powers the drive motor and LCD screen 103 via a power cable routed internally through the housing 101. The forward / reverse control buttons on the left and right sides of the housing allow for forward / reverse reversal of the CVT 1's output shaft, while the start / stop button on the front of the shockproof handle controls the motor's operation.

[0022] The torque transmission plate 2 is a multi-stage reducer, achieving speed reduction through internally installed multi-stage gears, and its overall outer shell is a plate-shaped structure. The rear side wall of the torque transmission plate 2 is fixedly mounted on the front end face of the continuously variable transmission 101. Simultaneously, the output shaft of the continuously variable transmission 1 is connected to the input shaft inside the lower part of the torque transmission plate 2 via a hinge, ensuring stable power transmission. A cylindrical hole is coaxially formed on the output shaft above the torque transmission plate 2, and a rotating cylinder 3 is installed inside the cylindrical hole. The rotating cylinder 3 is closed at its end, and a hexagonal hole is coaxially designed on its front end face, the size of which matches the size of the nut of the turnout bolt.

[0023] The outer diameter of the aforementioned rotating cylinder 3 matches the inner diameter of the cylindrical hole, and it is coaxially inserted into the cylindrical hole. The axial restraint between the rotating cylinder 3 and the cylindrical hole is limited by a shoulder designed circumferentially at the end of the rotating cylinder 3. At the same time, two through holes are opened at corresponding positions on the shoulder, which are used to insert screws and then connect and fix them with threaded holes opened at corresponding positions on the end face of the output shaft. This makes the rotating cylinder 3 and the cylindrical hole detachable, and thus, when facing the torque measurement of various bolts of different specifications, rotating cylinders 3 with hexagonal holes of different sizes can be installed in the cylindrical hole.

[0024] Through the above structure, the output torque of the drive motor is continuously variable after the transmission ratio is adjusted by the continuously variable transmission 102; then the torque is further reduced and the torque is increased by the torque transmission plate 2, which finally drives the rotating cylinder 3 to rotate at a slow speed with high torque.

[0025] Two rod-shaped reaction arms 4 are symmetrically fixedly installed on the left and right sides of the torque transmission plate 2. The lower part of the two reaction arms 4 is the contact section, which is attached and fixed to the left and right walls of the torque transmission plate 2 respectively. The upper part of the two reaction arms 4 is the support section, which is inclined towards the outside of the torque transmission plate 2. The vertical distance d between the top end of the two reaction arms 4 and the axis of the cylindrical hole on the upper output shaft of the torque transmission plate 2 should be greater than the distance between the axis of the cylindrical hole and the bottom of the torque transmission plate 2, and less than the distance between the center axis of the turnout bolt and the top surface of the rail base. The two reaction arms 4 can contact the top surface of the rail base to overcome the reaction force when the rotating cylinder rotates the turnout bolt. When the bottom end of the reaction arm 4 contacts the top surface of the rail base, the upper part of the reaction arm 4 is as vertical as possible, which enhances the support stability of the reaction arm 4.

[0026] All sharp corners of the aforementioned reaction arm 4 must be rounded. The reaction arm is made of ordinary Q235 steel, thus reducing damage to the top surface of the rail base when the reaction arm 4 contacts the high-carbon steel rail with higher hardness. Furthermore, a U-shaped steel sleeve 401, also made of ordinary Q235 steel, is fitted onto the upper end of the reaction arm 4. The sleeve 401 is fixed to the reaction arm 4 with side screws to increase the length of the reaction arm 4. Therefore, a steel sleeve 401 with an appropriate end thickness can be selected for installation according to actual needs, enabling the detection of torque on high-strength bolts with various hole heights.

[0027] In measuring the torque of turnout bolts, this utility model employs a bridge transmission method. After holding the handle, the torque transmission plate 2 is positioned on the side where the turnout bolt is located, following the specified alignment with the turnout rail. Figure 2 As shown, the entire torque transmission plate 2 is inverted. At this time, the rotating cylinder 3 is positioned by adjusting the left and right angles to interlock with the nut of the turnout bolt. Then, the drive motor is controlled to rotate according to the direction the nut is screwed in. During rotation, the entire device rotates around the axis of the turnout bolt due to the reaction force, until the top of the side reaction arm 4 contacts the top surface of the rail base to form a fulcrum, as shown. Figure 3 As shown, the reaction force provided when the bolt is twisted stops the entire device from rotating. At this time, the rotating cylinder 3 drives the nut to rotate, and the bolt torque value is measured during the process. Simultaneously, during the rotation of the rotating cylinder 3, the torque value of the bolt is collected by a torque sensor installed on the input shaft of the continuously variable transmission 102. This torque sensor is connected to the LCD screen 3, and the measured torque value is directly read and displayed on the screen, which is intuitive and convenient. The torque sensor measurement value can also be connected to a Bluetooth module, and the measurement result can be transmitted to an APP installed on a mobile device for convenient data review and storage.

Claims

1. A device for measuring the torque of a switch bolt, characterized in that: It comprises an electric torque wrench, a torque transmission plate, a rotating cylinder and a reaction force arm. The whole housing of the torque transmission plate is in a plate structure, and is a reducer with a transmission gear inside; the rear sidewall of the torque transmission plate is fixedly installed on the front end surface of the electric wrench; meanwhile, the output end of the electric wrench is connected with the input shaft below the torque transmission plate; a cylindrical hole is coaxially arranged on the output shaft above the torque transmission plate, and a rotating cylinder is installed in the cylindrical hole; the end of the rotating cylinder is closed, and a hole matched with the nut of the turnout bolt is coaxially designed on the front end surface of the rotating cylinder. Two rod-shaped reaction force arms are symmetrically fixedly installed on the left and right sides of the torque transmission plate, and the upper parts of the two reaction force arms are support sections and are inclined towards the outside of the torque transmission plate; the top ends of the reaction force arms are used for contacting the top of the steel rail to form a fulcrum.

2. The device for measuring the torque of a switch bolt according to claim 1, characterized in that: The electric torque wrench has a housing, a stepless speed changer, a liquid crystal display screen, a lithium battery and a Bluetooth module; the driving motor of the stepless speed changer is arranged in the upper part of the housing, and the end of the stepless speed changer is fixedly connected with the front end surface of the upper part of the housing; the lower part of the housing is an anti-vibration handle, and the lithium battery is inserted and fixed in the bottom end of the anti-vibration handle; the lithium battery is connected through the internal wiring of the housing; a torque sensor is installed on the input shaft of the stepless speed changer, and the torque sensor is connected with the liquid crystal display screen and the Bluetooth module.

3. The device for measuring the torque of a switch bolt according to claim 1, characterized in that: The end of the rotating cylinder is limited in the axial direction through the circumferential shoulder between the cylindrical hole; meanwhile, a through hole is arranged on the shoulder, a screw passes through the through hole and is threadedly connected with the threaded hole arranged on the corresponding position of the end surface of the output shaft of the torque transmission plate, so that the rotating cylinder and the cylindrical hole are detachably connected.

4. The device for measuring the torque of a switch bolt according to claim 1, characterized in that: The vertical distance between the top end of the two reaction force arms and the axis of the cylindrical hole on the output shaft of the upper part of the torque transmission plate is greater than the distance between the axis of the cylindrical hole and the lower end of the torque transmission plate, and is less than the distance between the central axis of the turnout bolt and the top surface of the bottom of the steel rail.

5. The device for measuring the torque of a switch bolt according to claim 1, characterized in that: When the top end of the reaction force arm contacts the top surface of the bottom of the steel rail, the upper part of the reaction force arm is in a vertical state.

6. The device for measuring the torque of a switch bolt according to claim 1, characterized in that: The output shaft of the stepless speed changer is connected with the input shaft below the torque transmission plate through a spline.

7. The device for measuring the torque of a switch bolt according to claim 1, characterized in that: The top end of the reaction force arm is sleeved with a steel sleeve.

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