Portable dynamometer torque calibration device

Abstract

The utility model relates to a portable dynamometer torque calibration device, and belongs to the technical field of rack torque calibration. Comprising a force arm, one end of the force arm is fixedly connected to a dynamometer, the other end of the force arm is provided with a force value sensor, a force applying mechanism is arranged below the force value sensor and applies force to the force value sensor, and the force value sensor is used for detecting a torque value and then comparing the torque value with a torque value of the dynamometer. The force applying mechanism comprises a bottom plate, a fixed pulley is arranged on the bottom plate, a movable pulley is arranged at the bottom of the force value sensor, a supporting rod is arranged on the bottom plate, a force applying lever obliquely arranged downwards is hinged to the supporting rod, a chain is wound around the fixed pulley and the movable pulley, and one end of the chain is arranged at the front end of the force applying lever. And the other end of the chain is fixed on the bottom plate. According to the invention, when the force application mechanism is used for applying force, the force application is very labor-saving, the operation is convenient, time-saving and labor-saving, the quick calibration of the dynamometer torque on the rack site is realized, and the calibration efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a portable dynamometer torque calibration device, belonging to the field of bench torque calibration technology. Background Technology

[0002] Currently, the torque calibration of dynamometers on domestic engine test benches uses standard lever arms and weights for static calibration. Repeated calibration processes require constant loading and unloading of weights, which is time-consuming and labor-intensive for rapid calibration and verification on the production site, resulting in low calibration efficiency, long downtime, and impact on production. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a portable dynamometer torque calibration device that is easy to operate, enables rapid calibration of dynamometer torque on-site, saves time and effort, and improves calibration efficiency.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: a portable dynamometer torque calibration device, including a lever arm, one end of which is fixedly connected to the dynamometer, and a force sensor is provided at the bottom of the other end of the lever arm. A force-applying mechanism is provided below the force sensor, and the force-applying mechanism applies force to the force sensor. The force sensor is used to detect the torque value, and then compare it with the torque value of the dynamometer, thereby completing the calibration of the torque value at each point.

[0005] The force-applying mechanism includes a base plate, a fixed pulley on the base plate, a movable pulley at the bottom of the force sensor, a support rod on the base plate, and a downwardly inclined force-applying lever hinged on the support rod. A chain is wound around the fixed pulley and the movable pulley, with one end of the chain located at the front end of the force-applying lever and the other end of the chain fixed to the base plate.

[0006] The base plate includes a horizontal plate and a vertical plate. The horizontal plate is fixed to the ground, and the vertical plate is fixed to the horizontal plate. The vertical plate is provided with multiple vertically evenly distributed positioning pins, which limit the force-applying lever step by step.

[0007] The lever arm has a positioning hole and a vertically arranged waist-shaped hole at one end. The positioning hole and the waist-shaped hole are arranged vertically at intervals. Bolts are inserted into the positioning hole and the waist-shaped hole respectively.

[0008] The force sensor is equipped with a digital display.

[0009] Compared with existing technologies, the advantages of this utility model are as follows: A portable dynamometer torque calibration device utilizes the lever principle to apply downward force through a force-applying lever, and maintains the applied force state through step-by-step limit by locating pins. The torque value displayed on the digital display is read and compared with the torque value of the dynamometer to complete the calibration of the torque value at each point. This application uses a force-applying mechanism that is very labor-saving, convenient to operate, and saves time and effort, enabling rapid on-site calibration of the dynamometer torque on a test bench, thus improving calibration efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a portable dynamometer torque calibration device according to an embodiment of the present invention;

[0011] In the diagram: 1. Lever arm; 1.1. Positioning hole; 1.2. Waist-shaped hole; 2. Force sensor; 3. Force applying mechanism; 3.1. Horizontal plate; 3.2. Movable pulley; 3.3. Fixed pulley; 3.4. Support rod; 3.5. Force applying lever; 3.6. Positioning pin; 3.7. Chain; 3.8. Fixing bolt; 3.9. Vertical plate; 4. Dynamometer. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0013] like Figure 1 As shown, a portable dynamometer torque calibration device in this embodiment includes a lever arm 1. One end of the lever arm 1 has a positioning hole 1.1 and a vertically arranged oblong hole 1.2, spaced vertically apart. Bolts are inserted into the positioning hole 1.1 and the oblong hole 1.2 to connect the lever arm 1 to the dynamometer 4. The oblong hole 1.2 is used to match different models of dynamometers. A force sensor 2 is installed at the bottom of the other end of the lever arm 1, and a digital display is mounted on the force sensor 2. A force-applying mechanism 3 is connected below the force sensor 2. The force-applying mechanism 3 drives the force sensor 2 to move up and down, thereby reading the torque value on the digital display, comparing it with the torque value of the dynamometer, and thus completing the calibration of the torque value at each point.

[0014] The aforementioned force-applying mechanism 3 includes a base plate, which comprises a horizontal plate 3.1 and a vertical plate 3.9, with the vertical plate 3.9 fixed to the top surface of the horizontal plate 3.1. The horizontal plate 3.1 is placed on the ground and fixed to the ground by symmetrically arranged fixing bolts 3.8. A fixed pulley 3.3 is provided on the horizontal plate 3.1, and a movable pulley 3.2 is provided at the bottom of the force sensor 2. A support rod 3.4 is provided on the horizontal plate 3.1, and a downwardly inclined force-applying lever 3.5 is provided above the horizontal plate 3.1. The front part of the force-applying lever 3.5 is fixed to the support rod 3.4 by a bearing, allowing the force-applying lever 3.5 to rotate around the bearing. One end of chain 3.7 is fixed to the horizontal plate 3.1. Chain 3.7 winds around the movable pulley 3.2 and the fixed pulley 3.3 in sequence. The other end of chain 3.7 is fixed to the front end of the force-applying lever 3.5. Pressing down the rear end of the force-applying lever 3.5 causes it to rotate around the bearing, lifting the front end of the lever 3.5. This causes chain 3.7 to drive the movable pulley 3.3 and the force sensor 2 to descend, displaying the torque value on the digital display. Multiple vertically evenly spaced positioning pins 3.6 are provided on the vertical plate 3.9. These positioning pins 3.6 progressively limit the force-applying lever 3.5, ensuring it remains in a loaded state.

[0015] During calibration, a lever is used to apply downward force, and locating pins are used to limit the applied force step by step. The torque value on the digital display is read and compared with the torque value of the dynamometer to complete the calibration of the torque value at each point. The force-applying mechanism used in this application is very labor-saving, convenient to operate, and saves time and effort. It enables rapid calibration of the dynamometer torque on the test bench, improving calibration efficiency.

[0016] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A portable dynamometer torque calibration device, characterized by: The application relates to a torque calibration device, which comprises a force arm, one end of the force arm being fixedly connected to a dynamometer, a force value sensor being arranged at the bottom of the other end of the force arm, a force adding mechanism being arranged below the force value sensor, the force adding mechanism applying force to the force value sensor, the force value sensor being used for detecting a torque value, and then comparing the torque value with a torque value of the dynamometer, so as to complete calibration of torque values of each point; the force adding mechanism comprises a bottom plate, a fixed pulley being arranged on the bottom plate, a movable pulley being arranged at the bottom of the force value sensor, a supporting rod being arranged on the bottom plate, a force adding lever being arranged on the supporting rod and being arranged in an inclined and downward direction, chains being arranged on the fixed pulley and the movable pulley, one end of the chains being arranged at the front end of the force adding lever, and the other end of the chains being fixed to the bottom plate.

2. The portable dynamometer torque calibration device of claim 1, wherein: The bottom plate comprises a horizontal plate and a vertical plate, the horizontal plate being fixed to the ground, the vertical plate being fixed to the horizontal plate, a plurality of vertical positioning pins being arranged on the vertical plate, and the positioning pins being used for step-by-step limiting of the force adding lever.

3. The portable dynamometer torque calibration device of claim 1, wherein: The force arm is provided with a positioning hole and a waist-shaped hole arranged in a vertical direction, the positioning hole and the waist-shaped hole being arranged in an up-down interval, and bolts being respectively arranged in the positioning hole and the waist-shaped hole.

4. The portable dynamometer torque calibration device of claim 1, wherein: A digital display meter is arranged on the force value sensor.

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