A stepless adjustable hardness standard part

Abstract

The utility model provides a kind of infinitely adjustable hardness standard part, including standard part main body, elastic cylinder and adjusting piston;The elastic cylinder is wholly sleeved in the outside of the standard part main body, to form hardness detection area;Annular cavity is set to the inside of the standard part main body corresponding elastic cylinder, and one end of the standard part main body is provided with piston cavity, and the annular cavity is communicated with piston cavity by air hole;The region of the elastic cylinder and annular cavity junction is sealed to form closed booster chamber;The piston head of the adjusting piston is installed in the piston cavity, by controlling adjusting piston, change the air pressure in booster chamber, and then change the hardness value of the outer surface of elastic cylinder.The infinitely adjustable hardness standard part has the advantages of infinitely variable, higher flexibility.

Description

Technical Field

[0001] This utility model relates to the field of hardness calibration technology, specifically, to a steplessly adjustable hardness standard component. Background Technology

[0002] Hardness is an important indicator of cigarette quality, and it is usually necessary to use hardness testing equipment to test the surface hardness of cigarettes.

[0003] The testing process of hardness testing equipment uses pressure testing. The probe is pressed against the surface of the object, and the reading of the pressure sensor is then measured. The reading of the pressure sensor is used to characterize the hardness index.

[0004] These testing devices are measuring instruments, therefore, they need to be calibrated regularly to ensure their accuracy.

[0005] Currently, the industry uses hardness standard bars, which are made of materials with a specific hardness. Their hardness index is constant and can be used to calibrate hardness testing equipment.

[0006] However, the calibration of hardness testing equipment often requires the use of a group of standard bars with gradient hardness design, as a single hardness standard bar cannot meet the requirements.

[0007] For example, in the utility model patent with publication number CN218847887U, entitled "Composite Standard Rod for Measuring Cigarette Filter Rod with Controllable Hardness Index", a standard rod with replaceable hardness module is disclosed, which can realize the indication of different hardness index by replacing modules with different hardness.

[0008] However, changing the method requires frequent disassembly of the standard bar, which is relatively cumbersome, and the selection of the hardness module is also somewhat difficult.

[0009] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0010] The purpose of this invention is to address the shortcomings of existing technologies by providing a steplessly adjustable hardness standard part that can achieve stepless changes and greater adjustment flexibility.

[0011] To achieve the above objectives, the technical solution adopted by this utility model is: a stepless adjustable hardness standard part, comprising a standard part body, an elastic cylinder and an adjusting piston;

[0012] The elastic cylinder is fitted onto the outside of the standard part body to form a hardness testing area;

[0013] An annular cavity is provided inside the body of the standard part corresponding to the elastic cylinder, and a piston cavity is provided at one end of the body of the standard part. The annular cavity and the piston cavity are connected through an air hole.

[0014] The area at the junction of the elastic cylinder and the annular cavity is sealed to form a closed pressurization chamber;

[0015] The piston head of the adjusting piston is installed in the piston chamber. By controlling the adjusting piston, the air pressure in the pressurization chamber is changed, thereby changing the hardness value of the outer surface of the elastic cylinder.

[0016] Based on the above, the piston rod of the adjusting piston is connected to the piston rod channel of the standard part body by means of threads.

[0017] Based on the above, the piston rod is provided with a scale for indicating the hardness value.

[0018] Based on the above, the material of the elastic cylinder is rubber.

[0019] Based on the above, the length of the piston chamber is at least half the length of the pressurization chamber.

[0020] Based on the above, there are multiple air holes between the pressurization chamber and the piston chamber, which are distributed in a circumferential array.

[0021] Based on the above, the outer contour of the standard part body is a cylinder.

[0022] Based on the above, a sealing ring is provided on the piston and the piston cavity surface.

[0023] Based on the above, the smooth portion of the piston rod and the smooth portion of the piston rod channel are provided with matching sealing rings.

[0024] Based on the above, a handle is provided at the outer end of the adjusting piston.

[0025] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model utilizes the characteristic that elastic cylinders such as rubber will change in hardness due to deformation after being compressed and deformed, to construct the hardness gradient requirement of the hardness standard bar. Since the deformation process is infinitely variable, the corresponding hardness change can also be infinitely variable, thereby realizing infinitely variable hardness value change under a single hardness standard bar, and meeting the design requirements of hardness gradient.

[0026] Furthermore, in order to make the adjustment have corresponding indications, a scale is added to the piston rod, and the scale value is adaptively matched with the specific hardness change value according to the experiment.

[0027] Furthermore, the length of the piston chamber is set according to the length of the booster chamber, at least half its length, so as to be able to stimulate the maximum deformation range of the booster chamber. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of the working state of the infinitely adjustable hardness standard part in this utility model.

[0029] Figure 2 This is a structural schematic diagram of the non-working state of the infinitely adjustable hardness standard part in this utility model.

[0030] In the diagram: 1. Standard part body; 2. Elastic cylinder; 3. Adjusting piston; 11. Pressure chamber; 12. Piston chamber; 13. Air hole; 14. Piston rod channel; 15. Balance air hole; 16. Air passage; 31. Piston head; 32. Piston rod; 33. Handle; 34. Sealing ring. Detailed Implementation

[0031] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0032] like Figure 1 and Figure 2 As shown, a steplessly adjustable hardness standard part includes a standard part body 1, an elastic cylinder 2, and an adjusting piston 3.

[0033] In this embodiment, the elastic cylinder 2 is made of rubber and is fitted entirely onto the outside of the standard part body 1 to form a hardness testing area. During calibration, the probe of the hardness testing device is mainly used to detect the hardness value of the outer surface of the elastic cylinder 2.

[0034] An annular cavity is provided inside the body 1 of the standard component, corresponding to the elastic cylinder. The area at the junction of the elastic cylinder 2 and the annular cavity is sealed to form a closed pressurization chamber 11.

[0035] A piston chamber 12 is provided at one end of the standard component body 1. The pressurization chamber 11 is connected to the piston chamber 12 through a vent 13. In this embodiment, there are multiple vents 13 between the pressurization chamber 11 and the piston chamber 12, which are arranged in a circumferential array to realize the pressure change of the pressurization chamber 11.

[0036] The piston head 31 of the adjusting piston 3 is installed in the piston chamber 12. By controlling the adjusting piston 3, the air pressure in the pressurization chamber 11 is changed, thereby changing the hardness value of the outer surface of the elastic cylinder 2.

[0037] Since the piston adjustment process is an active process, in order to achieve self-locking, the piston rod 32 of the adjusting piston 3 is connected to the piston rod channel 14 of the standard body 1 by a thread. When the required value is reached, stopping further turning will achieve self-locking, avoiding the problem of adding an additional self-locking mechanism. For ease of operation, in this embodiment, a handle 33 is provided at the outer end of the adjusting piston 3.

[0038] The issue of indicating the specific hardness value can be addressed through experiments. The relationship between changes in hardness value and changes in the feed amount of adjusting piston 3 can be observed and recorded, and then converted into a scale relationship. The piston rod 32 is provided with a scale for indicating the hardness value, and the standard body 1 is provided with a corresponding pointer.

[0039] In order to meet the piston's travel stroke and effectively boost the pressure in the booster chamber 11, the length of the piston chamber 12 is at least half the length of the booster chamber 11.

[0040] In terms of the design of the outer contour, the outer contour of the standard part body 1 is a cylinder, which is consistent with the traditional hardness indicator standard bar.

[0041] To ensure airtightness, a sealing ring 34 is provided on the surface of the piston head 31 and the piston chamber 11, and a matching sealing ring is provided on the smooth part of the piston rod 32 and the smooth part of the piston rod channel 14.

[0042] Because air pressure varies in different regions and long-term airtightness is unreliable, a balance vent 15 is provided in the rear moving section of the piston chamber to connect to the outside in order to prevent gas loss. Correspondingly, an air passage 16 is provided on the piston head 31 to connect to the piston chamber. By connecting the balance vent 15 and the air passage 16, the internal and external air pressure can be balanced during use, and the hardness value of the elastic cylinder 2 when the piston head 31 is in a certain position can be determined.

[0043] Working principle explanation:

[0044] This infinitely adjustable hardness standard part is used to replace traditional grouped standard parts. When in use, according to the range requirements of the testing instrument and the parameter value requirements of the specification, the stroke of the adjusting piston 3 is adjusted to reach a certain value within the parameter value range required by the specification. Then, the hardness of the elastic cylinder is tested and the value is recorded using the testing instrument. Then, the stroke of the adjusting piston 3 is adjusted to adjust the hardness parameter to another value, and the hardness of the elastic cylinder is tested again using the testing instrument. This process is repeated until multiple parameter values ​​are tested, thus completing the calibration requirements of the hardness testing equipment.

[0045] Remove the standard part for the infinitely variable sleeve's starvation hardness, and completely loosen the adjusting piston 3 to restore it to an unpressurized state, ready for subsequent use.

[0046] Of course, since the elastic cylinder itself will also have fatigue issues, it is necessary to replace the elastic cylinder and align the scale values ​​after a certain period of use in order to ensure long-term use.

[0047] Of course, since the standard part has a simple overall structure and low cost, it can also be used as a tool with non-replaceable parts. When the elastic cylinder has been used a certain number of times, it should be discarded and replaced with a new one.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A standard part with infinitely adjustable hardness, characterized in that: Includes the standard main body, elastic cylinder, and adjusting piston; The elastic cylinder is fitted onto the outside of the standard part body to form a hardness testing area; An annular cavity is provided inside the body of the standard part corresponding to the elastic cylinder, and a piston cavity is provided at one end of the body of the standard part. The annular cavity and the piston cavity are connected through an air hole. The area at the junction of the elastic cylinder and the annular cavity is sealed to form a closed pressurization chamber; The piston head of the adjusting piston is installed in the piston chamber. By controlling the adjusting piston, the air pressure in the pressurization chamber is changed, thereby changing the hardness value of the outer surface of the elastic cylinder.

2. The infinitely adjustable hardness standard part according to claim 1, characterized in that: The piston rod of the adjusting piston is connected to the piston rod channel of the standard part body by means of threads.

3. The infinitely adjustable hardness standard part according to claim 2, characterized in that: The piston rod is provided with a scale for indicating the hardness value.

4. The infinitely adjustable hardness standard part according to any one of claims 1-3, characterized in that: The elastic cylinder is made of rubber.

5. The infinitely adjustable hardness standard part according to claim 1, 2, or 3, characterized in that: The length of the piston chamber is at least half the length of the pressurization chamber.

6. The infinitely adjustable hardness standard part according to claim 1, 2, or 3, characterized in that: There are multiple air holes between the pressurization chamber and the piston chamber, which are distributed in a circumferential array.

7. The infinitely adjustable hardness standard part according to claim 1, 2, or 3, characterized in that: The outer contour of the standard part body is cylindrical.

8. The infinitely adjustable hardness standard part according to claim 1, 2, or 3, characterized in that: A sealing ring is provided on the piston and the surface of the piston cavity.

9. The infinitely adjustable hardness standard part according to claim 2 or 3, characterized in that: The smooth part of the piston rod and the smooth part of the piston rod channel are provided with matching sealing rings.

10. The infinitely adjustable hardness standard part according to claim 1, 2, or 3, characterized in that: A handle is provided at the outer end of the adjusting piston.

Images