An adjustable force sensor fixture for tobacco

Abstract

A tobacco-specific adjustable force sensor clamp, the overall shape of the clamp is in the shape of a cigarette stick, including a cylindrical clamp base and an extension screw, a position fixing nut and an extension nut connected to the two ends of the base; a concave clamping platform for placing a force measuring probe is provided in the middle of the cylindrical clamp base, and two pairs of clamping screws are arranged on the inner end faces of the base cylinder on both sides of the concave clamping platform, and the extension length of the clamping screws is adjustable, and the force measuring probe is clamped and fixed by the two pairs of clamping screws. When the clamp is in use, it can simulate the state of placing cigarettes and filter rods to place the measuring probe of the force measuring device, which is beneficial to the fixation of the sensor measuring device. Both ends of the clamp can be supported and the length can be adjusted. It is suitable for detection equipment of different brands and models, and can effectively reduce human errors in the measurement process. The present invention can also be extended to the fixed clamping of other types of sensor probes other than force sensors.

Description

Technical Field

[0001] The invention relates to the field of mechanical technology, in particular to an adjustable force sensor clamp specially used for tobacco. Background Art

[0002] The hardness of cigarettes and filter rods is an important physical performance index of cigarettes and filter rods. The method for measuring the hardness of cigarettes and filter rods in China is usually the point pressure method, that is, a certain pressure is applied to the cigarettes and filter rods radially within a certain period of time, and the hardness is expressed by the percentage of the diameter of the cigarette and filter rod after and before the pressure. The force applied before and after the pressure is also the pre-pressure and the total pressure. Therefore, it is very important to measure the accuracy of the pre-pressure and the total pressure applied when measuring the hardness. JJG (Tobacco) 01-2012 "Cigarette and Filter Rod Physical Performance Comprehensive Test Bench Verification Procedure" also stipulates the size of the pre-pressure and the total pressure applied when measuring the hardness. In the actual use of the cigarette and filter rod physical performance comprehensive test bench, it is necessary to frequently calibrate the pre-pressure and the total pressure applied when measuring the hardness through a force sensor. The existing force measuring device measuring probe used for calibration is usually a cylindrical thin sheet type, and the force signal is transmitted through a cable. Since there are many brands of comprehensive test benches for the physical properties of cigarettes and filter rods, the installation directions of the indenter and the baffle are different when measuring hardness, and the space between the indenter and the baffle is small, and it can only be used to place objects with shapes similar to cigarettes and filter rods. There are many difficulties in performing the indenter force calibration operation using the existing force measuring device measuring probe. For example, it is difficult to directly place the force measuring device measuring probe, and it is difficult to ensure that the axis of the hardness measurement indenter of the comprehensive test bench for the physical properties of cigarettes and filter rods is aligned with the measuring axis of the force measuring device measuring probe. The measurement result is affected due to the inability to fix the placement position during the measurement process. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and provide a tobacco-specific adjustable force sensor fixture. The length of the fixture is adjustable, and the overall shape of the fixture is similar to the shape of the cigarette and filter rod test sample. It is suitable for the comprehensive physical property test bench of cigarettes and filter rods of different brands and specifications. When measuring the pre-pressure and full pressure, it can simulate the placement state of cigarettes and filter rods to place the force measuring device measuring probe, and can assist personnel in the alignment operation of the hardness measuring pressure head of the comprehensive physical property test bench of cigarettes and filter rods and the force measuring device measuring probe, which is conducive to the fixation of the sensor measuring device.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A tobacco-specific adjustable force sensor fixture, the overall shape of the fixture is in the shape of a cigarette stick, including a cylindrical clamp base, and an extension screw connected to both ends of the base, a position fixing nut and an extension nut;

[0006] A concave clamping platform for placing the force measuring probe is provided in the middle of the cylindrical clamping base, and two pairs of clamping screws are arranged on the inner end faces of the base cylinder on both sides of the concave clamping platform, and the extension length of the clamping screws is adjustable, and the force measuring probe is clamped and fixed by the two pairs of clamping screws; the extension screw is fixedly connected to the outer end axis of the base cylinder, and the other end of the extension screw is sequentially covered with a position fixing nut and an extension nut by a threaded manner;

[0007] Probe cable lead-out grooves are provided on the base cylinders located on both sides of the concave clamping platform and on the extension screw rod.

[0008] The extension screws and extension nuts at both ends of the base have different lengths, wherein the longer screw is matched with the longer extension nut. The positions of the extension nuts at both ends are adjusted to meet the length requirements of the force sensor fixture of different test benches.

[0009] The inner end faces on both sides of the concave clamping platform are arc-shaped inner end faces concentric with the force measuring probe, which can facilitate the alignment operation of the auxiliary force measuring probe and the measuring pressure head.

[0010] The overall length of the force sensor fixture is adjustable, and the length of the entire force sensor fixture is adjusted by adjusting the positions of the extension nuts on the extension screws at both ends of the fixture.

[0011] The probe type of the force sensor suitable for clamping in the present invention is: the probe is a circular measuring probe with a diameter less than 14 mm, or a rectangular measuring probe with a length less than 11.7 mm.

[0012] The beneficial effects of the present invention are that the force sensor clamp of the present invention can utilize the plane of the nut extended at one end thereof for support to fix the position of the force sensor probe; and in combination with the characteristics of the comprehensive physical property test benches for cigarettes and filter rods of various brands and models, the length of the extended nut is adjusted, and the auxiliary alignment groove (i.e., the arc-shaped inner end face of the concave clamping platform) is utilized to realize the alignment operation between the hardness measuring pressure head of the comprehensive physical property test bench for cigarettes and filter rods and the force sensor probe; in addition, the clamp can clamp a variety of force sensor probes, and the structure similar to that of cigarettes and filter rods also enables it to be applicable to comprehensive physical property test benches for cigarettes and filter rods of various brands and models, and has universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 is a schematic diagram of the structure of the present invention (the probe shown in the figure is a typical force measuring probe);

[0015] Figure 2 For along Figure 1 Schematic diagram of the middle AA line;

[0016] Figure 3 For along Figure 1 Schematic diagram of the middle BB line;

[0017] Figure 4 for Figure 1 A three-dimensional schematic diagram of

[0018] Figure 5 It is a three-dimensional diagram of a cylindrical clamper base and an extension screw fixed together, and a concave clamping platform is provided on the base.

[0019] In the figure: 1. Cylindrical clamp base, 2. Concave clamping platform, 2.1. Arc-shaped inner end surface (i.e. auxiliary alignment groove); 3. Clamping screw; 4. Force measuring probe; 5. Probe cable lead-out groove; 6. Extension screw; 7. Fixing nut; 8. Extension nut. DETAILED DESCRIPTION

[0020] The following is a further description of the tobacco-specific adjustable force sensor fixture in conjunction with the accompanying drawings:

[0021] like Figure 1-4 As shown: a tobacco-specific adjustable force sensor fixture, the overall shape of the fixture is in the shape of a cigarette stick, including a cylindrical clamp base 1 and an extension screw 6 connected to both ends of the base, a position fixing nut 7 and an extension nut 8;

[0022] A concave clamping platform 2 for placing a force measuring probe is provided in the middle of the cylindrical clamping base 1, and two pairs of clamping screws 3 are arranged on the arc-shaped inner end faces 2.1 of the base cylinder on both sides of the concave clamping platform, and the extension length of the clamping screws is adjustable, and the force measuring probe 4 is clamped and fixed by the two pairs of clamping screws 3; an extension screw 6 is fixedly connected to the outer end axis of the base cylinder (the extension screw 6 and the base 1 are an integrated structure), and the other end of the extension screw 6 is sequentially covered with a position fixing nut 7 and an extension nut 8 by a threaded manner;

[0023] Probe cable lead-out grooves 5 are provided on the base cylinder located on both sides of the concave clamping platform and on the extension screw.

[0024] The extension screw and extension nut at both ends of the base have different lengths, one long and one short, wherein the longer screw is matched with the longer extension nut. The purpose of the design of one long and one short is to facilitate the adjustment of the support position of the fixture of the present invention and the test bench.

[0025] The overall length of the force sensor fixture is adjustable, and the length of the entire force sensor fixture is adjusted by adjusting the positions of the extension nuts 8 on the extension screws 6 at both ends of the fixture.

[0026] The fixture can clamp measuring probes of various shapes, such as round probes with a diameter less than 14 mm or rectangular probes with a length less than 11.7 mm. It can be expanded to other types of sensor probes besides force sensors, such as displacement sensors, speed sensors, etc., to achieve the measurement of the pressure speed of the hardness measurement indenter of the comprehensive test bench for the physical properties of cigarettes and filter rods.

[0027] Before starting to test the hardness measurement head pressure of the comprehensive test bench for physical properties of cigarettes and filter rods, place the tobacco-specific adjustable force sensor fixture of the present invention in the hardness measurement unit of the comprehensive test bench for physical properties of cigarettes and filter rods according to the state of cigarettes and filter rods being placed, and use the smoke shield of the comprehensive test bench for physical properties of cigarettes and filter rods to support it. If the smoke shield is close to the position of the hardness measurement head of the comprehensive test bench for physical properties of cigarettes and filter rods, place the extension nut at one end of the tobacco-specific adjustable force sensor fixture against the smoke shield, and lead the probe connection cable from the extension nut at the other end. After selecting the direction, rotate and adjust the four clamping screws to fix the force measuring probe; rotate the extension nut and the position fixing nut to make the position of the axis of the auxiliary alignment groove 2.1 (that is, the center of the force measuring probe 4) coincide with the position of the axis of the cylindrical body of the hardness measurement head of the comprehensive test bench for physical properties of cigarettes and filter rods, and then the hardness measurement head pressure of the comprehensive test bench for physical properties of cigarettes and filter rods can be measured.

Claims

1. A tobacco-specific adjustable force sensor fixture, characterized in that: The overall shape of the clamp is in the shape of a cigarette stick, and it includes a cylindrical clamp base, an extension screw connected to both ends of the base, a position fixing nut and an extension nut; A concave clamping platform for placing the force measuring probe is provided in the middle of the cylindrical clamping base, and two pairs of clamping screws are arranged on the inner end faces of the base cylinder on both sides of the concave clamping platform, and the extension length of the clamping screws is adjustable, and the force measuring probe is clamped and fixed by the two pairs of clamping screws; the extension screw is fixedly connected to the outer end axis of the base cylinder, and the other end of the extension screw is sequentially covered with a position fixing nut and an extension nut by a threaded manner; Probe cable lead-out grooves are provided on the base cylinders and the extension screws on both sides of the concave clamping platform; The extension screws and extension nuts at both ends of the base have different lengths, wherein the longer screw is matched with the longer extension nut. The positions of the extension nuts at both ends are adjusted to meet the length requirements of the force sensor fixture of different test benches. The inner end faces on both sides of the concave clamping platform are arc-shaped inner end faces concentric with the force measuring probe, which can facilitate the alignment operation of the auxiliary force measuring probe and the measuring pressure head.

2. The tobacco-specific adjustable force sensor fixture according to claim 1, characterized in that: The overall length of the force sensor fixture is adjustable, and the length of the entire force sensor fixture is adjusted by adjusting the positions of the extension nuts on the extension screws at both ends of the fixture.

3. The adjustable force sensor fixture for tobacco according to claim 1, characterized in that: The force measuring probe is a circular measuring probe with a diameter less than 14 mm, or a rectangular measuring probe with a length less than 11.7 mm.

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