Clamping device of standard appliance
By designing a clamping device containing T-shaped and circular guides, the problem of unstable contact between the standard rod and the platform in the three-coordinate measuring instrument is solved, the detection accuracy and stability are improved, and more accurate standard rod calibration is achieved. .
Patent Information
- Application Number
- CN202420956274.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-06
AI Technical Summary
When the existing three-coordinate measuring instrument detects the length, circumference and hardness standard rod, the standard rod contacts the platform unstable, resulting in a decrease in detection accuracy.
Design a clamping device for standard instruments, fixed on the three-coordinate measuring instrument platform through a base, and use the T-shaped first guide and the circular second guide to improve the movement accuracy and stability, combined with the semicircular limit position The structure of the groove and T-shaped limit hole ensures stable clamping of the standard rod.
The detection accuracy and stability of the standard rod are improved, and the calibration accuracy of the three-coordinate measuring instrument is enhanced.
Smart Images
Figure CN222336332U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of detection technology, and more specifically, to a clamping device for a standard instrument. Background Art
[0002] The length, circumference and hardness of cigarettes are important physical performance indicators of cigarettes. Their values not only affect the intrinsic quality of cigarette products, but also change the smoke parameters. Currently, before each test, the machine is self-calibrated using length standard rods, circumference standard rods and hardness standard rods.
[0003] According to relevant regulations, the verification / calibration cycle of the standard rod is one year. In the prior art, a three-coordinate measuring instrument can be used to verify / calibrate the standard rod. The three-coordinate measuring instrument includes a detection head and a platform arranged below the detection head. Figure 3 ), circumference standard rod (see Figure 4 ) or hardness standard rod is placed on the platform, and the detection head can verify / calibrate the standard rod. However, the surface of the length standard rod in contact with the platform is a circular surface, and the circular standard rod and the hardness standard rod are not easy to be stable when placed on the platform. These factors reduce the detection accuracy of the three-dimensional coordinate measuring machine for the standard rod. Utility Model Content
[0004] The present application provides a clamping device for a standard instrument, in which the entire clamping device is fixed on the platform of a three-dimensional coordinate measuring instrument through a base, and a T-shaped first guide member is used to guide the mobile clamping part during its movement, thereby improving the accuracy of movement, thereby improving the stability of clamping, and further improving the detection accuracy of the standard rod.
[0005] The present application provides a clamping device for a standard tool, comprising a base and a clamping device;
[0006] The base is provided with a screw hole connected to the platform of the three-dimensional coordinate measuring machine, and the base is provided with a first guide member, and the cross section of the first guide member is T-shaped;
[0007] The clamp includes a fixed clamping part and a movable clamping part. The first ends of the fixed clamping part and the movable clamping part are both provided with a T-shaped limiting hole matching the first guide member. The fixed clamping part is fixed on the first guide member, and the movable clamping part is movably arranged on the first guide member.
[0008] Semicircular limiting grooves are respectively arranged on the opposite surfaces of the second ends of the fixed clamping part and the movable clamping part; in the working state, the two semicircular limiting grooves are buckled, and a part of the standard rod is accommodated in the buckled space.
[0009] Preferably, a cylindrical second guide member is also provided on the base;
[0010] The fixed clamping part and the movable clamping part are provided with circular limiting holes matching with the second guide member, and the circular limiting holes are located between the T-shaped limiting holes and the semicircular limiting grooves.
[0011] Preferably, the short sides of the T-shaped limiting holes of the fixed clamping portion and the movable clamping portion respectively form notches at the end surfaces of the first ends of the fixed clamping portion and the movable clamping portion.
[0012] Preferably, for the length standard rod, the semicircular limiting grooves on the fixed clamping part and the movable clamping part pass through the entire opposite surfaces of the two, so that in the working state, the two ends of the length standard rod are respectively exposed to the outside of the two ends of the space after buckling.
[0013] Preferably, for the circumference standard rod and the hardness standard rod, the semicircular limiting grooves on the fixed clamping part and the movable clamping part extend from one end of the opposite surfaces of the two to the middle of the opposite surfaces, so that in the working state, the non-detection ends of the circumference standard rod and the hardness standard rod are wrapped in the space after buckling, and the detection ends are exposed to one side of the space after buckling.
[0014] Preferably, for the length standard rod, the fixed clamping part and the movable clamping part are T-shaped in appearance, the semicircular limiting groove extends along the length direction of the long side of the T-shape, and the T-shaped limiting hole and the circular limiting hole are arranged on the short side of the T-shape.
[0015] Preferably, for the circumference standard rod and the hardness standard rod, the fixed clamping part and the movable clamping part are cylindrical in shape.
[0016] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.
[0018] Figure 1 A schematic structural diagram of a preferred embodiment of a clamping device for a length standard rod provided in the present application;
[0019] Figure 2 A schematic structural diagram of a preferred embodiment of a clamping device for a circumferential standard rod provided in the present application;
[0020] Figure 3 is a schematic diagram of the structure of the length standard rod;
[0021] Figure 4 Schematic diagram of the structure of the circular standard rod. DETAILED DESCRIPTION
[0022] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application.
[0023] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.
[0024] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.
[0025] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.
[0026] The present application provides a clamping device for a standard instrument, wherein the entire clamping device is fixed on a platform of a three-dimensional coordinate measuring machine through a base, and a T-shaped first guide is used to guide the mobile clamping part during its movement, thereby improving the movement accuracy, thereby improving the clamping stability, and further improving the detection accuracy of the standard rod. In addition, on the basis of the T-shaped first guide, the clamping device is also provided with a circular second guide, which further improves the movement accuracy of the mobile clamping part.
[0027] The clamping device of the standard instrument provided in the present application comprises a base and a clamping device. The base is provided with a screw hole connected to the platform of the three-dimensional coordinate measuring machine, and the base is provided with a first guide member, and the cross section of the first guide member is T-shaped.
[0028] The clamp includes a fixed clamping part and a movable clamping part. The first ends of the fixed clamping part and the movable clamping part are both provided with T-shaped limiting holes matching the first guide member. The fixed clamping part is fixed on the first guide member, and the movable clamping part is movably arranged on the first guide member.
[0029] Semicircular limiting grooves are respectively arranged on the opposite surfaces of the second ends of the fixed clamping part and the movable clamping part. In the working state, the two semicircular limiting grooves are buckled, and a part of the standard rod is accommodated in the buckled space.
[0030] Preferably, a cylindrical second guide is further provided on the base. The fixed clamping part and the movable clamping part are provided with a circular limiting hole matching the second guide, and the circular limiting hole is located between the T-shaped limiting hole and the semicircular limiting groove.
[0031] Preferably, the short sides of the T-shaped limiting holes of the fixed clamping portion and the movable clamping portion respectively form notches at the end surfaces of the first ends of the fixed clamping portion and the movable clamping portion.
[0032] Example 1
[0033] Figure 1 FIG. 2 is a schematic structural diagram of a preferred embodiment of a clamping device for a length standard rod. Figure 1 As shown, the clamping device of the length standard rod includes a base 1 and a clamp. The base 1 is provided with a screw hole 11 connected to the platform of the three-dimensional coordinate measuring machine, and the base 1 is provided with a first guide member 4 and a second guide member 5. The cross section of the first guide member 4 is T-shaped, and the second guide member 5 is cylindrical.
[0034] The clamp includes a fixed clamping part 2 and a movable clamping part 3. The first ends of the fixed clamping part 2 and the movable clamping part 3 are both provided with a T-shaped limiting hole matching the first guide member 4. Figure 1 As shown, the short sides of the T-shaped limiting holes of the fixed clamping part 2 and the movable clamping part 3 respectively form the end surfaces of the first ends of the fixed clamping part 2 and the movable clamping part 3 ( Figure 1 The notch is shown as the right end surface.
[0035] Semicircular limiting grooves 21 and 31 are respectively provided on the opposite surfaces of the second ends of the fixed clamping part 2 and the movable clamping part 3. The fixed clamping part 2 and the movable clamping part 3 are provided with circular limiting holes matching the second guide member 5, and the circular limiting holes are located between the T-shaped limiting holes and the semicircular limiting grooves. The fixed clamping part 2 is fixed on the first guide member 4, and the movable clamping part 3 is movably arranged on the first guide member 4.
[0036] like Figure 3 As shown, the length standard rod includes a middle section 101 and end sections 102 and 103 on both sides thereof. During verification / calibration, the three-dimensional coordinate measuring machine identifies the end surface of the end section 102 and the end surface of the end section 103, measures the length between the two end surfaces, and compares the measured length with the standard length to determine the verification / calibration result of the length standard rod.
[0037] Based on this, the semicircular limiting grooves 21 and 31 on the fixed clamping part 2 and the movable clamping part 3 run through the entire opposite surfaces of the two, so that in the working state, the two ends of the length standard rod are respectively exposed to the outside of the two ends of the space after buckling.
[0038] Preferably, if Figure 1 As shown, the fixed clamping part 2 and the movable clamping part 3 are T-shaped in appearance, the semicircular limiting groove extends along the length direction of the long side of the T-shape, and the T-shaped limiting hole and the circular limiting hole are arranged on the short side of the T-shape.
[0039] The mobile clamping part 3 is located above the fixed clamping part 2. In the non-working state, the mobile clamping part 3 is placed on the fixed clamping part 2 by gravity. When in use, the base 1 is fixed on the base of the three-dimensional coordinate measuring machine, and then the mobile clamping part 3 is manually raised, and the middle part of the length standard rod is placed on the semicircular limit groove 21, and then the mobile clamping part 3 is slowly lowered to make the mobile clamping part 3 and the fixed clamping part 2 buckle, and the length standard rod can be positioned on the clamping device and the three-dimensional coordinate measuring machine, and the detection head can verify / calibrate the length standard rod.
[0040] Example 2
[0041] Figure 2 FIG. 2 is a schematic structural diagram of a preferred embodiment of a clamping device for a length standard rod. Figure 2 As shown, the clamping device of the circumference standard rod includes a base 10 and a clamp. The base 10 is provided with a screw hole 110 connected to the platform of the three-dimensional coordinate measuring machine, and the base 10 is provided with a first guide member 50 and a second guide member 40, the cross section of the first guide member 50 is T-shaped, and the second guide member 40 is cylindrical.
[0042] like Figure 2 As shown, the clamp includes a fixed clamping part 20 and a movable clamping part 30, and the fixed clamping part and the movable clamping part are cylindrical in shape. The first ends of the fixed clamping part 20 and the movable clamping part 30 are both provided with a T-shaped limiting hole matching the first guide member 50. The short sides of the T-shaped limiting holes of the fixed clamping part 20 and the movable clamping part 30 respectively form the end faces of the first ends of the fixed clamping part 20 and the movable clamping part 30 ( Figure 2 The notch is shown as the lower end surface.
[0043] Semicircular limiting grooves 210 and 310 are respectively provided on the opposite surfaces of the second ends of the fixed clamping part 20 and the movable clamping part 30. The fixed clamping part 20 and the movable clamping part 30 are provided with circular limiting holes matching the second guide member 40, and the circular limiting holes are located between the T-shaped limiting holes and the semicircular limiting grooves. The fixed clamping part 20 is fixed on the first guide member 50, and the movable clamping part 30 is movably arranged on the first guide member 50.
[0044] like Figure 4 As shown, the circumference standard rod includes a shaft shoulder 201 and a first section 202 (reducing shaft section) and a second section 203 (reducing shaft section) on both sides thereof. During verification / calibration, the three-dimensional coordinate measuring machine identifies three points on the edge of the end face 204 of the second section 203, measures the diameter of the circle surrounded by the three points, and compares the measured diameter with the standard diameter to determine the verification / calibration result of the circumference standard rod.
[0045] Based on this, the semicircular limiting grooves 210 and 310 on the fixed clamping part 20 and the movable clamping part 30 are formed from one end of the opposite surface of the two ( Figure 2The upper end is shown in the figure) extends to the middle of the opposite surface, so that in the working state, the non-detection end ( Figure 4 The end of the first section 202 is shown in FIG. 2 ) is wrapped in the space after buckling, and the detection end ( Figure 4 The end of the second section 203 is shown in FIG. 2 ) exposed to one side of the space after snapping ( Figure 2 The upper part of the space after buckling is shown in the figure).
[0046] When in use, the base 10 is fixed on the base of the three-dimensional coordinate measuring machine, and then the movable clamping part 30 is manually moved away from the fixed clamping part 20, and the end of the first section 202 of the circumference standard rod is placed on the semicircular limit groove 210, and then the movable clamping part 30 is slowly moved beyond the fixed clamping part 20, so that the movable clamping part 30 and the fixed clamping part 20 are engaged. Due to the double friction force of the first guide member and the second guide member, the movable clamping part 30 will not make relative movement, so that the circumference standard rod can be positioned on the clamping device and the three-dimensional coordinate measuring machine, and the detection head can verify / calibrate the circumference standard rod.
[0047] The structure and testing principle of the hardness standard rod are similar to those of the circumference standard rod, so they will not be described in detail here.
[0048] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.
Claims
1. A clamping device for a standard instrument, characterized in that: Includes a base and a holder; The base is provided with a screw hole connected to the platform of the three-dimensional coordinate measuring machine, and the base is provided with a first guide member, and the cross section of the first guide member is T-shaped; The clamp comprises a fixed clamping part and a movable clamping part, the first ends of the fixed clamping part and the movable clamping part are both provided with a T-shaped limiting hole matching the first guide member, the fixed clamping part is fixed on the first guide member, and the movable clamping part is movably arranged on the first guide member; Semicircular limiting grooves are respectively arranged on the opposite surfaces of the second ends of the fixed clamping part and the movable clamping part; in the working state, the two semicircular limiting grooves are buckled, and a part of the standard rod is accommodated in the buckled space.
2. The standard fixture clamping device according to claim 1, characterized in that: The base is also provided with a cylindrical second guide member; The fixed clamping portion and the movable clamping portion are provided with circular limiting holes matching the second guide member, and the circular limiting holes are located between the T-shaped limiting holes and the semicircular limiting grooves.
3. The clamping device for standard equipment according to claim 1, characterized in that: Short sides of the T-shaped limiting holes of the fixed clamping portion and the movable clamping portion respectively form notches at the end surfaces of the first ends of the fixed clamping portion and the movable clamping portion.
4. The clamping device for standard equipment according to claim 1, characterized in that: For the length standard rod, the semicircular limiting grooves on the fixed clamping part and the movable clamping part penetrate the entire opposite surfaces of the two, so that in the working state, the two ends of the length standard rod are respectively exposed to the outside of the two ends of the space after buckling.
5. The standard fixture clamping device according to claim 2, characterized in that: For the circumference standard rod and the hardness standard rod, the semicircular limiting grooves on the fixed clamping part and the movable clamping part extend from one end of the opposite surfaces of the two to the middle of the opposite surfaces, so that in the working state, the non-detection ends of the circumference standard rod and the hardness standard rod are wrapped in the space after buckling, and the detection ends are exposed to one side of the space after buckling.
6. The standard fixture clamping device according to claim 2, characterized in that: For the length standard rod, the fixed clamping part and the movable clamping part are T-shaped in appearance, the semicircular limiting groove extends along the length direction of the long side of the T-shape, and the T-shaped limiting hole and the circular limiting hole are arranged on the short side of the T-shape.
7. The standard fixture clamping device according to claim 2, characterized in that: For the circumference standard rod and the hardness standard rod, the fixed clamping part and the movable clamping part have a cylindrical shape.