A flexible strap tension measuring instrument

Abstract

A flexible strap tension measuring instrument comprises a tension measuring instrument body and a handle (1), a liquid crystal display (2), a first guide shaft (3), a second guide shaft (4) and a sensor measuring shaft (5), wherein the first guide shaft (3), the second guide shaft (4) and the sensor measuring shaft (5) are fixedly mounted on the upper end surface of the tension measuring instrument body and the handle (1), and the liquid crystal display (2) is embedded in the front surface of the tension measuring instrument body and the handle, wherein the sensor measuring shaft (5) is in the middle, and the first guide shaft (3) and the second guide shaft (4) are respectively on both sides of the sensor measuring shaft (5), and the sensor measuring shaft (5) is a flat metal rod. The present invention has the advantages of being suitable for measuring straps in a narrow measuring space, having accurate measurement results and being easy to use, and a single person can complete the measurement operation, thereby greatly saving personnel and reducing work intensity.

Description

Technical Field

[0001] The invention relates to a flexible binding belt tension measuring instrument, which is used for tension measurement in a narrow space, and is particularly used for tension measurement of a rope transmission structure of mechanical equipment. Background Art

[0002] The reliability and stability of the airbag and heat shield deployment process of a certain product depends on whether the tension of the airbag cover strap meets the design requirements after the airbag is folded, and should have high consistency. However, the space between the airbag cover and the strap is small, and it is difficult to measure the strap tension. Currently, after the airbag is folded, the airbag cover strap is only tightened by a rope tensioner, and the degree of strap tension is determined based on the operator's experience. After tightening, the strap is sewn. The strap tension applied by the above method is unknown. At the same time, the consistency and stability of the strap tension between different straps and between different batches of the same strap are not high, resulting in poor reliability and stability in the subsequent airbag and heat shield deployment process.

[0003] The tension of a tied strap or belt cannot be measured directly for many years, and is generally measured by indirect or estimated methods. Although there are many various tension meters in the prior art, and small tension meters have a history of several decades, there is no tension meter suitable for conveniently measuring the tension of the strap or belt of a tied product. Perhaps the shape of the existing tension meter has become the inherent shape of the tension meter, so there are few improvements to the measurement shape of this device. The existing measurement process is very cumbersome and must be measured indirectly or calculated. Summary of the invention

[0004] The invention provides a flexible binding belt tension measuring instrument, which overcomes the problem in the prior art that the binding belt cannot be directly measured or is difficult to directly measure due to narrow space.

[0005] A flexible strap tension measuring instrument, comprising a tension measuring instrument body and a handle 1, a liquid crystal display 2, a first guide shaft 3, a second guide shaft 4 and a sensor measuring shaft 5, wherein the first guide shaft 3, the second guide shaft 4 and the sensor measuring shaft 5 are fixedly mounted on the upper end surface of the tension measuring instrument body and the handle 1, and the liquid crystal display 2 is embedded in the front surface of the tension measuring instrument body and the handle, wherein the sensor measuring shaft 5 is in the middle, and the first guide shaft 3 and the second guide shaft 4 are respectively on both sides of the sensor measuring shaft 5, characterized in that the sensor measuring shaft 5 is a flat metal rod, the rear surface of the sensor measuring shaft 5 is a plane, and the rear surface 51 of the sensor measuring shaft 5 is in the same plane as the rear surface of the tension measuring instrument body and the handle 1, the rear surface 52 of the sensor measuring shaft 5 is an arc in cross section, and the head of the sensor measuring shaft 5 is made into a wedge-shaped head 53, and the angle between the front surface of the wedge-shaped head 53 and the rear surface 51 of the sensor measuring shaft 5 is α, wherein 15°<α<45°.

[0006] The angle α between the front surface of the wedge-shaped head 53 and the rear surface 51 of the sensor measuring shaft 5 is 15°<α<30°.

[0007] The present invention has the advantages of being suitable for measuring straps in narrow measuring spaces, accurate measurement results, and easy to use, and a single person can complete the measurement operation, thus greatly saving personnel and reducing work intensity. During the installation of the airbag protection cover of a certain product, the tension during the installation of the strap is measured by using a flexible strap tension measuring instrument, which ensures the consistency and stability of the strap tension and greatly improves the reliability of the installation of the airbag protection cover. It ensures that the tension of the strap installation during the product assembly process remains stable and reaches the required value, thereby improving the consistency and stability of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 , is a front schematic diagram of the present invention;

[0009] Figure 2 , is a schematic diagram of the side structure of the present invention;

[0010] Figure 3 , is a schematic diagram of the force on the sensor measuring shaft 5 of the present invention;

[0011] Figure 4 , is a schematic diagram of the use state of the present invention;

[0012] Figure 5 ,for Figure 1 Partial cross-sectional view of the AA surface;

[0013] Figure 6 ,for Figure 5 B is a partial enlarged view;

[0014] 1 is the tension measuring instrument body and handle, 2 is the LCD screen, 3 is the first guide shaft, 4 is the second guide shaft 2, 5 is the sensor measuring shaft, 6 is the strap, and 7 is the product tied with the strap. 51 is the rear surface of the sensor measuring shaft 5, 52 is the front surface of the sensor measuring shaft 5, and 53 is the wedge-shaped head. DETAILED DESCRIPTION

[0015] A flexible strap tension measuring instrument, comprising a tension measuring instrument body and a handle 1, a liquid crystal display 2, a first guide shaft 3, a second guide shaft 4 and a sensor measuring shaft 5, wherein the first guide shaft 3, the second guide shaft 4 and the sensor measuring shaft 5 are fixedly mounted on the upper end surface of the tension measuring instrument body and the handle 1, and the liquid crystal display 2 is embedded in the front surface of the tension measuring instrument body and the handle, wherein the sensor measuring shaft 5 is in the middle, and the first guide shaft 3 and the second guide shaft 4 are respectively on both sides of the sensor measuring shaft 5, characterized in that the sensor measuring shaft 5 is a flat metal rod, the rear surface of the sensor measuring shaft 5 is a plane, and the rear surface 51 of the sensor measuring shaft 5 is in the same plane as the rear surface of the tension measuring instrument body and the handle 1, the rear surface 52 of the sensor measuring shaft 5 is an arc in cross section, and the head of the sensor measuring shaft 5 is made into a wedge-shaped head 53, and the angle between the front surface of the wedge-shaped head 53 and the rear surface 51 of the sensor measuring shaft 5 is α, wherein 15°<α<45°.

[0016] The angle α between the front surface of the wedge-shaped head 53 and the rear surface 51 of the sensor measuring shaft 5 is 15°<α<30°.

[0017] It ensures the reliability of the mechanical transmission structure and can also be used for rope testing in production lines and laboratories. It can provide accurate and quantitative tightness parameters for the production process to ensure that the tension of the wire or strip remains stable or reaches the required value during the production process.

[0018] Since the narrow strap of a certain product is already in close contact with the cylindrical surface under tension, the gap is small. Therefore, the present invention proposes a flexible strap tension measuring instrument with a wedge-shaped mechanical structure. The measuring head is made into a wedge shape. Figure 2 As shown, the measuring position can be directly inserted into the gap of the narrow band to measure the tension. The sensor is an important part of the tension measuring instrument. The tension value is determined by the measurement data of the tension sensor. When measuring the tension, the sensor measuring shaft is pushed into one side of the narrow band using the narrow gap to form the measured wrap angle A with the two guide shafts on the other side of the narrow band (the force condition is as follows Figure 3 As shown in the figure), the measured strap tension value F=2×T×sin(A / 2)+G can be obtained, where F is the pressure on the sensor (N), A is the angle of the rope to the sensor (degrees), and G is the weight of the sensor axle and guide shaft (N). Since the gravity G of the sensor axle and guide shaft has a small effect on the force and can be ignored, the magnitude of the force on the tension sensor is F=2×T×sin(A / 2), and the tension value can be displayed on the LCD screen 2 on the tension measuring instrument body and handle 1.

[0019] When in use, the body and handle 1 of the handheld tension measuring instrument are used to insert the sensor measuring shaft 5 into the measuring gap of the measured strap, and the measuring instrument is rotated at a certain angle to make the measured strap enter the guide shaft gap and be tangent to one of the first guide shafts 3. The measuring instrument is then rotated to make the measured rope enter the tension sensor groove, and then the tension measuring instrument is tilted to make the measured rope be tangent to the other second guide shaft 4, so that the measured strap can reach the measuring position, and then the measured tension value can be directly read through the LCD screen 2.

[0020] Specific embodiment: A flexible strap tension measuring instrument includes a tension measuring instrument body and handles 1, 2, a liquid crystal display screen 2, a first guide shaft 3, a second guide shaft 4, and a sensor measuring shaft 5.

[0021] The head structure of the sensor measuring shaft 5 of the present invention is a wedge-shaped structure with a small size (such as Figure 1 , Figure 2 When measuring, use the narrow gap to push the 1-4 sensor measuring axis into one side of the strap. The first guide axis 3 and the second guide axis 4 on both sides of the sensor measuring axis 5 are located on the other side of the strap (the schematic diagram of the position of the tension measuring instrument measuring axis and the narrow strap is shown in the figure). Figure 4 As shown in the figure), the strap forms a measured wrap angle A between the three axes (the force condition is as follows Figure 3 The tension value of the strap is calculated by the formula. The tension value is displayed on the LCD screen 2 on the tension measuring instrument.

[0022] During the installation of the airbag protection cover of a certain product, the flexible strap tension measuring instrument is used to measure the tension of the strap during the installation process, thereby ensuring the consistency and stability of the strap tension and improving the reliability of the airbag protection cover installation.

Claims

1. A flexible strap tension measuring instrument, comprising a tension measuring instrument body and a handle (1), a liquid crystal display (2), a first guide shaft (3), a second guide shaft (4) and a sensor measuring shaft (5), wherein the first guide shaft (3), the second guide shaft (4) and the sensor measuring shaft (5) are fixedly mounted on the upper end surface of the tension measuring instrument body and the handle (1), and the liquid crystal display (2) is embedded in the front surface of the tension measuring instrument body and the handle, wherein: The sensor measuring shaft (5) is in the middle, and the first guide shaft (3) and the second guide shaft (4) are respectively on both sides of the sensor measuring shaft (5), characterized in that the sensor measuring shaft (5) is a flat metal rod, the rear surface of the sensor measuring shaft (5) is a plane, and the rear surface of the sensor measuring shaft (5) and the rear surface of the tension measuring instrument body and the handle (1) are in the same plane, the cross section of the front surface of the sensor measuring shaft (5) is an arc, and the head of the sensor measuring shaft (5) is made into a wedge-shaped head (53), and the angle between the front surface of the wedge-shaped head (53) and the rear surface of the sensor measuring shaft (5) is α, wherein 15°<α<45°.

2. A flexible strap tension measuring instrument according to claim 1, characterized in that: The angle α between the front surface of the wedge-shaped head (53) and the rear surface of the sensor measuring axis (5) is 15°<α<30°.

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