Variable-diameter circumference length standard rod

Abstract

The utility model provides a variable-diameter circumference length standard rod. The variable-diameter circumference length standard rod comprises a basic rod body and a variable-diameter circumference measuring assembly installed on the basic rod body. The variable-diameter circumference measuring assembly comprises a plurality of circumference length standard components which are arranged in a set, and the circumference lengths of the circumference length standard components are different; one end of the basic rod body is a circumferential length detection area; by switching different circumferential length standard components to the circumferential length detection area of the basic rod body, the change of the circumferential length is realized. The diameter-variable circumference length standard rod has the advantages that multi-circumference length calibration can be achieved in a diameter-variable mode, and the diameter-variable circumference length standard rod is more suitable for automatic application.

Description

Technical Field

[0001] This utility model relates to the field of standard instrument technology, specifically to a standard bar with variable diameter and circumference. Background Technology

[0002] The national standard GB / T22838.5-2009, "Determination of Physical Properties of Cigarettes and Filters," specifies the testing requirements and corresponding testing standards for various properties of cigarettes. In Part III, it specifies the method for testing the circumference length of cigarettes and filters. The current standard provides a method for measuring the circumference length by using an optical instrument to scan the cigarette or filter 360 degrees and then calculating the average value by testing a group of cigarettes and filters from the same batch.

[0003] Because this non-contact optical measurement method relies on the accuracy of the optical instruments, the optical measuring instruments need to be calibrated regularly.

[0004] Currently, the standard instrument used for calibrating optical instruments in cigarette filter rod integrated testing benches is called a circumferential standard rod. It is a standard rod designed with a set circumferential length. It is usually set in groups and has a gradient change in circumferential length in order to calibrate multiple test values ​​within a limited range.

[0005] Due to the existence of gradient requirements, multiple standard bars need to be used in groups for the circumferential standard bar, which is quite cumbersome. When automation is carried out and the circumferential length needs to be calibrated automatically, a robotic arm that can automatically change the circumferential standard bar needs to be designed, which has the problems of high investment cost and high design difficulty.

[0006] To overcome the above problems, the existing circumferential standard bar needs to be modified to meet the calibration requirements of existing optical measuring instruments.

[0007] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a variable diameter circumference length standard bar that can achieve multi-circumference length calibration through a variable diameter method and is more suitable for automated applications.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is: a variable diameter circumference length standard bar, including a base bar body and a variable diameter circumference measuring component installed on the base bar body;

[0010] The variable diameter circumference measuring assembly includes a set of several circumference length standard parts, each with a different circumference length.

[0011] One end of the basic rod is the circumference length detection area;

[0012] The circumference length can be varied by switching between different standard parts with different circumference lengths to the circumference length detection area of ​​the base rod.

[0013] Based on the above, one end of the basic rod corresponding to the circumference length detection area is an inner shaft, and the several circumference length standard parts are nested and assembled ring modules. The innermost ring module and the inner shaft, as well as the two adjacent ring modules, slide and cooperate with each other. Each layer of ring modules can move independently. By increasing or decreasing the number of ring modules stacked in the circumference length detection area, the circumference length can be changed.

[0014] As described above, a nut is installed at the outer end of the inner shaft.

[0015] Based on the above, the surface of the annular module is provided with an axial guide groove, and the end of the guide groove is provided with a locking groove at 90° to the guide groove. The end of each annular module is provided with a locking block that slides into the guide groove. The locking block slides into the locking groove of the adjacent inner annular module to lock the two adjacent annular modules axially.

[0016] Based on the above, a stop ring is provided at the end of the annular module used to install the locking block.

[0017] Based on the above, the diameter of the base rod is greater than or equal to the outer diameter of the outermost annular module.

[0018] Based on the above, a locking hole is provided at one end of the base rod corresponding to the circumference length detection area. Several circumference length standard parts constituting the variable diameter circumference measuring component are a group of circumference rods with different outer diameters. A locking shaft is provided at one end of the circumference rod corresponding to the locking hole. By replacing the circumference rods with different outer diameters to cooperate with the base rod, the circumference length can be changed.

[0019] Based on the above, a locking pin hole is provided radially in the lock hole, and a locking ring is provided in the area of ​​the locking pin hole corresponding to the locking shaft.

[0020] Based on the above, the outer diameter gradient of each of the circumferential bars varies.

[0021] Based on the above, each of the circumferential standard parts in the variable diameter circumferential measuring assembly is equipped with a QR code carrying parameter information.

[0022] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model has the following advantages:

[0023] 1. The calibration of circumference length is essentially the measurement of the outer diameter of multiple standard parts with different diameters. Based on this premise, this application sets a certain area as the circumference detection area on the basis of the same standard part mechanism, and then realizes the indication of different circumference lengths by switching standard parts with different diameters to the circumference detection area, thereby realizing the gradient circumference length detection under a single standard part.

[0024] 2. When designing specific schemes, a ring-shaped method can be used to indicate the gradient circumference length, or the circumference length of the map can be indicated by changing the circumference rods of different diameters, resulting in a variety of schemes.

[0025] 3. Compared with traditional solutions, this application only requires a single standard rod to complete the functions of multiple standard rods, making it more convenient to operate and more conducive to automation transformation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the variable diameter circumference standard bar in Embodiment 1 of this utility model.

[0027] Figure 2 This is a front view of the variable diameter circumference standard bar in Embodiment 1 of this utility model.

[0028] Figure 3 This is a partial cross-sectional view of the variable diameter circumferential length standard bar in Embodiment 1 of this utility model.

[0029] Figure 4 This is one of the schematic diagrams showing the changes in the variable diameter circumference standard bar in Embodiment 1 of this utility model.

[0030] Figure 5 This is the second schematic diagram showing the variation of the variable diameter circumferential length standard bar in Embodiment 1 of this utility model.

[0031] Figure 6 This is the third schematic diagram showing the variation of the variable diameter circumference standard bar in Embodiment 1 of this utility model.

[0032] Figure 7 This is a cross-sectional view of the variable diameter circumference standard bar in Embodiment 2 of this utility model.

[0033] Figure 8 This is a diagram showing the composition of a set of circumferential bars in Embodiment 2 of this utility model.

[0034] In the diagram: 1. Basic rod body; 2. Variable diameter circumference measuring component; 3. Circumference length detection area; 4. Circumference rod; 11. Inner shaft; 12. Nut; 13. Locking hole; 14. Locking pin hole; 21. Ring module; 22. Guide groove; 23. Locking groove; 24. Locking block; 25. Stop ring; 41. Locking shaft; 42. Locking ring. Detailed Implementation

[0035] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0036] Example 1

[0037] like Figures 1-6 As shown, a variable diameter circumference standard bar includes a base bar 1 and a variable diameter circumference measuring component 2 mounted on the base bar 1.

[0038] The variable diameter circumference measuring component 2 includes a set of several circumference length standard parts, each with a different circumference length.

[0039] One end of the basic rod 1 is the circumference length detection area 3.

[0040] The circumference length can be varied by switching between different standard parts with different circumference lengths to the circumference length detection area of ​​the base rod.

[0041] In this embodiment, one end of the base rod 1 corresponding to the circumference length detection area is an inner shaft 11. The plurality of circumference length standard parts are nested and assembled ring modules 21. The innermost ring module and the inner shaft 11 are slidably engaged with each other, and the two adjacent ring modules 21 are slidably engaged with each other. Each layer of ring modules 21 can move independently. The circumference length can be changed by increasing or decreasing the number of ring modules stacked in the circumference length detection area 3.

[0042] To prevent the annular module 21 from falling off, a nut 12 is installed at the outer end of the inner shaft 11 to lock the stroke of the annular module 21.

[0043] Since the sliding motion of each annular module 21 needs to be restricted, the surface of the annular module 21 is provided with an axial guide groove 22, and the end of the guide groove 22 is provided with a locking groove 23 at 90° with the guide groove. The end of each annular module is provided with a locking block 24 that slides into the guide groove. The locking block 24 slides into the locking groove 23 of the adjacent inner annular module to lock the two adjacent annular modules axially.

[0044] To facilitate the movement of the ring module 21, a stop ring 25 is provided at the end of the ring module 21 for mounting the locking block 24. When operating the internal ring module 21, the ring module 21 can be moved by operating the stop ring 25.

[0045] To facilitate the operation of the entire standard rod, the diameter of the base rod 1 is greater than or equal to the outer diameter of the outermost annular module 21, and the area of ​​the base rod 1 can be used as a handle end for manual or machine clamping operation.

[0046] Since the testing equipment is often optical, QR codes can be added. Each circumferential standard part in the variable diameter circumferential measurement component is equipped with a QR code carrying parameter information. By scanning the code, the parameter information on the current circumferential standard part can be obtained, and the information can be automatically entered to achieve parameter comparison.

[0047] Working principle:

[0048] The core function of the circumferential standard bar is to provide a circumferential length index with a stable indication for the testing equipment to perform the test. In this embodiment, in order to realize the indication of multiple circumferential length indices under a single standard bar, a region is first set on the basis of the base bar 1. This region serves as the circumferential length detection region 3 for the testing equipment to perform the test. Then, a variable diameter scheme is designed to change the outer diameter at the circumferential length detection region 3.

[0049] In this embodiment, a set of ring modules 21 nested together is designed. Due to the principle of nested stacking, each layer of ring modules 21 represents a circumference length value. By manually operating or by using a robotic arm or other mechanism to move the stop ring 25 at the end of the ring module 21, the number of ring modules 21 stacked in the circumference length detection area 3 can be adjusted, thereby realizing the change of circumference length.

[0050] When performing automation, since there is only one standard bar in this embodiment, only one robot arm is needed to transfer the standard bar. The movement of the ring module 21 only includes horizontal sliding and rotation. The corresponding robot arm only needs to perform the action of turning the stop ring 25 and providing a small angle turning action to finally achieve automated calibration.

[0051] Example 2

[0052] like Figure 7 and Figure 8 As shown, the main difference between this embodiment and embodiment 1 is that: a lock hole 13 is provided at one end of the basic rod body 1 corresponding to the circumference length detection area, and several circumference length standard parts constituting the variable diameter circumference measurement component are a group of circumference rods 4 with different outer diameters. In order to achieve gradient change, the outer diameter of each circumference rod changes gradient.

[0053] One end of the circumferential rod 4 is provided with a locking shaft 41 corresponding to the lock hole. By replacing the circumferential rod 4 with a different outer diameter and matching it with the base rod 1, the circumferential length can be changed.

[0054] To improve the locking tightness and ease of disassembly, a locking pin hole 14 is provided radially in the locking hole 13, and a locking ring 42 is provided in the area of ​​the locking pin hole 14 on the locking shaft 41 to prevent axial movement of the circumferential bar 4.

[0055] Working principle explanation:

[0056] In this embodiment, the change in the circumference length detection area mainly relies on changing the matching circumference bar 4, and the circumference length is characterized by the outer diameter parameter of the circumference bar 4 itself.

[0057] This solution is relatively simpler and more suitable for manual replacement.

[0058] If automation is to be implemented, a pair of robotic arms that can align and connect the two parts are required, along with an automated tool that can tighten and lock the pins. The robotic arms are required to have a certain degree of functional integration.

[0059] 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 bar with variable diameter and circumference, characterized in that: Includes a base rod and a variable diameter circumference measuring assembly mounted on the base rod; The variable diameter circumference measuring assembly includes a set of several circumference length standard parts, each with a different circumference length. One end of the basic rod is the circumference length detection area; The circumference length can be varied by switching between different standard parts with different circumference lengths to the circumference length detection area of ​​the base rod.

2. The variable diameter circumferential length standard bar according to claim 1, characterized in that: The base rod has an inner shaft at one end corresponding to the circumference length detection area. The several circumference length standard parts are nested and assembled ring modules. The innermost ring module and the inner shaft, as well as the two adjacent ring modules, slide and cooperate with each other. Each layer of ring modules can move independently. The circumference length can be changed by increasing or decreasing the number of ring modules stacked in the circumference length detection area.

3. The variable diameter circumferential length standard bar according to claim 2, characterized in that: A nut is installed at the outer end of the inner shaft.

4. The variable diameter circumferential length standard bar according to claim 2 or 3, characterized in that: The surface of the annular module is provided with an axial guide groove, and the end of the guide groove is provided with a locking groove at 90° to the guide groove. The end of each annular module is provided with a locking block that slides into the guide groove. The locking block slides into the locking groove of the adjacent inner annular module to lock the two adjacent annular modules axially.

5. The variable diameter circumferential length standard bar according to claim 4, characterized in that: The end of the annular module used to mount the locking block is provided with a stop ring.

6. The variable diameter circumferential length standard bar according to claim 2, 3, or 5, characterized in that: The diameter of the base rod is greater than or equal to the outer diameter of the outermost annular module.

7. The variable diameter circumferential length standard bar according to claim 1, characterized in that: A locking hole is provided at one end of the base rod corresponding to the circumference length detection area. Several circumference length standard parts constituting the variable diameter circumference measurement component are a group of circumference rods with different outer diameters. A locking shaft is provided at one end of the circumference rod corresponding to the locking hole. The circumference length can be changed by replacing the circumference rods with different outer diameters to cooperate with the base rod.

8. The variable diameter circumferential length standard bar according to claim 7, characterized in that: The lock hole is provided with a locking pin hole in the radial direction, and the lock shaft is provided with a locking ring in the area corresponding to the locking pin hole.

9. The variable diameter circumferential length standard bar according to claim 7 or 8, characterized in that: The outer diameter gradient of each of the aforementioned circular bars.

10. The variable diameter circumferential length standard bar according to claim 1, characterized in that: Each of the circumferential standard parts in the variable diameter circumferential measurement assembly is equipped with a QR code carrying parameter information.

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