Hollow cone frustum measuring device and measuring method thereof

Abstract

The application provides a hollow conical platform measuring device, and relates to the technical field of hollow conical platform measurement.The device comprises a range finder, a base, a rotating disc, a supporting seat, an extension plate, a lifting fastening screw, a connecting plate, a supporting platform and a lifting device.The supporting seat is installed on the rotating disc, the rotating disc is rotatably installed on the base, the supporting platform is installed on the side of the supporting seat, the extension plate is located below the supporting platform, a positioning lifting groove is formed in the end of the extension plate away from the supporting seat, the lifting device is inserted into the positioning lifting groove, the connecting plate is placed above the supporting platform, the upper end of the lifting device is connected with the connecting plate, the range finder is placed above the connecting plate, and the rear end surface of the range finder when placed horizontally, the front end surface of the supporting seat, the central axis of the rotating disc and the central axis of the base are located on the same plane.The hollow conical platform measuring device has the advantages of simple structure, convenient carrying, convenient operation in the measuring process, intuitive reading, short measuring time and accurate data.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of hollow conical frustum measurement, and particularly relates to a hollow conical frustum measuring device and a measuring method thereof. BACKGROUND

[0002] At present, the size of the hollow conical frustum is measured by using a steel tape to wrap around the hollow conical frustum. However, the measurement data is inaccurate, the measurement error is large, and the length of the product exceeds the technical requirements.

[0003] Therefore, it is necessary to develop a measuring device for measuring the size of the hollow conical frustum, which is convenient, simple to use, and accurate in measurement, to solve the bottleneck encountered in the detection of the manufacturing process of the hollow conical frustum. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide a hollow conical frustum measuring device and a measuring method thereof to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides a hollow conical frustum measuring device, which comprises a range finder, a base, a turntable, a support seat, an extension plate, a lifting fastening screw, a connecting plate, a support platform and a lifting device. The support seat is installed on the turntable, the turntable is rotatably installed on the base, the support platform is installed on the side of the support seat, the extension plate is located below the support platform and connected to one end of the support seat, a positioning lifting groove is formed in the end of the extension plate away from the support seat, the lifting device is inserted into the positioning lifting groove in an up-and-down manner, a threaded hole is formed in the side of the extension plate and communicates with the positioning lifting groove, the lifting device is fixed by screwing the lifting fastening screw into the threaded hole, the connecting plate is placed above the support platform, the upper end of the lifting device is connected to the connecting plate, the range finder is placed above the connecting plate, and the rear end surface of the range finder when placed horizontally, the front end plane of the support seat (the side of the support seat connected to the support platform is the front end), the central axis of the turntable and the central axis of the base are on the same plane.

[0006] Further, the support seat is in the shape of L, and the front end plane is a vertical plane.

[0007] Further, the lifting device comprises a connecting frame one, a longitudinal fine adjustment screw rod, a longitudinal fine adjustment screw, a connecting frame two and a lifting rod. The connecting frame one is in the shape of a "j" and is composed of three first horizontal plates and two first vertical plates. The two side first horizontal plates of the connecting frame one are connected with the connecting plate. A threaded hole is formed in the middle first horizontal plate of the connecting frame one. The connecting frame two is in the shape of a "U" and is composed of two second vertical plates and a second horizontal plate. A threaded hole is formed in the second horizontal plate of the connecting frame two. The longitudinal fine adjustment screw is fixedly connected with the longitudinal fine adjustment screw rod. One end of the longitudinal fine adjustment screw rod is screwed into the threaded hole formed in the middle first horizontal plate of the connecting frame one, and the other end is screwed into the threaded hole formed in the second horizontal plate of the connecting frame two. The lifting rod is inserted into the positioning lifting groove. The upper end of the lifting rod is connected with the connecting frame two.

[0008] Further, a front support in the shape of a "concave" is further included. The front support is composed of two third vertical plates and a third horizontal plate. Two threaded holes are formed in the connecting plate, the third horizontal plate of the front support and the two side first horizontal plates of the connecting frame one. The connecting plate, the front support and the connecting frame one are placed in sequence from top to bottom and are fixed by fastening screws.

[0009] Further, a rear support and two springs are further included. The rear support is in the shape of a "concave". The rear support is composed of two fourth vertical plates and a fourth horizontal plate. Threaded holes are formed in the two fourth vertical plates. The rear support is located below the supporting platform. One end of each of the two springs is fixed on the two third vertical plates of the front support. Threaded holes are formed in the two sides of the supporting platform. The other end of each of the two springs is connected with a screw. The two screws are screwed into the threaded holes of the two fourth vertical plates of the rear support and the two sides of the supporting platform in sequence, so as to fix the two springs on the two sides of the rear support and the supporting platform.

[0010] Further, the rotating disc is in the shape of a hollow cylinder with a cover at one end. A through hole is formed in the center of the cover of the rotating disc. A through hole is formed in the center axis of the base. The through holes formed in the rotating disc and the base are aligned and communicate with each other.

[0011] Further, a threaded hole is formed in the side surface of the rotating disc. The relative position of the rotating disc and the base is fixed by screwing a transverse fastening screw into the threaded hole in the side surface of the rotating disc.

[0012] Further, a handle is installed on the rear end surface of the supporting seat. The lower part of the lifting rod is connected with the lifting handle.

[0013] Further, the end of the connecting plate away from the supporting seat is connected with a front positioning seat. The front positioning seat is located above the connecting plate.

[0014] The application provides a method for measuring the size of a hollow conical frustum by using the hollow conical frustum measuring device, and specifically comprises the following steps:

[0015] Step 1: Marking the large-mouth measuring points and the small-mouth measuring points

[0016] Draw a large-mouth reference line and a small-mouth reference line on the inner wall of the hollow conical frustum, and mark a plurality of large-mouth measuring points and a plurality of small-mouth measuring points on the large-mouth reference line and the small-mouth reference line, wherein the number of the large-mouth measuring points and the small-mouth measuring points is more than two;

[0017] Step 2: Placing the hollow conical frustum and the hollow conical frustum measuring device

[0018] Draw two concentric circles with the same radius as the large-mouth radius and the small-mouth radius of the hollow conical frustum on the assembly table, place the hollow conical frustum on the assembly table through the support piers, with the large mouth downward and the small mouth upward, adjust the hollow conical frustum to a horizontal state through the gaskets, and the intersection of the central axis of the hollow conical frustum and the assembly table coincides with the center of the concentric circles on the assembly table;

[0019] Place the hollow conical frustum measuring device on the assembly table, and the intersection of the central axis of the base and the assembly table coincides with the center of the concentric circles on the assembly table;

[0020] Step 3: Measuring the large-mouth radius of the hollow conical frustum

[0021] Step 3.1: Turn on the range finder, loosen the lifting fastening screw, raise or lower the lifting rod, so that the laser point emitted by the range finder falls near the large-mouth reference line of the hollow conical frustum, and then tighten the lifting fastening screw;

[0022] Loosen the transverse fastening screw, rotate the rotating disc, when the laser point emitted by the range finder falls directly above or below the first large-mouth measuring point on the large-mouth reference line, tighten the transverse fastening screw, then rotate the longitudinal fine adjustment screw until the laser point emitted by the range finder falls on the first large-mouth measuring point, press the measurement key of the range finder, and measure and record the inner radius R1 of the first large-mouth measuring point of the hollow conical frustum;

[0023] Step 3.2: Loosen the transverse fastening screw, rotate the rotating disc, when the laser point emitted by the range finder falls directly above or below the second large-mouth measuring point on the large-mouth reference line, tighten the transverse fastening screw, then rotate the longitudinal fine adjustment screw until the laser point emitted by the range finder falls on the second large-mouth measuring point, press the measurement key of the range finder, and measure and record the inner radius R2 of the second large-mouth measuring point of the hollow conical frustum;

[0024] Step 3.3: Similarly, measure and record the inner radius of the other large-mouth measuring points of the hollow conical frustum according to the method of step 3.2;

[0025] Step 4: Measure the small opening radius of the hollow conical table

[0026] Step 4.1: Turn on the distance meter, loosen the lifting fastening screw, raise the lifting rod, and make the laser point emitted by the distance meter fall near the small opening reference line of the hollow conical table, and then tighten the lifting fastening screw.

[0027] Loosen the transverse fastening screw, rotate the dial, and when the laser point emitted by the distance meter falls directly above or below the first small opening measuring point on the small opening reference line, tighten the transverse fastening screw. Then, rotate the longitudinal fine adjustment screw until the laser point emitted by the distance meter falls on the first small opening measuring point. Press the measuring key of the distance meter to measure and record the inner radius r1 of the first small opening measuring point of the hollow conical table.

[0028] Step 4.2: Loosen the transverse fastening screw, rotate the dial, and when the laser point emitted by the distance meter falls directly above or below the second small opening measuring point on the small opening reference line, tighten the transverse fastening screw. Then, rotate the longitudinal fine adjustment screw until the laser point emitted by the distance meter falls on the second small opening measuring point. Press the measuring key of the distance meter to measure and record the inner radius r2 of the second small opening measuring point of the hollow conical table.

[0029] Step 4.3: Similarly, according to the method of step 4.2, measure and record the inner radii of the other small opening measuring points of the hollow conical table.

[0030] Further, in step 2, a cylindrical positioning rod is used. The positioning rod is vertically inserted into the through hole at the center axis of the dial and the base. When the contact point of the positioning rod on the assembly table coincides with the center of the concentric circle on the assembly table, the hollow conical table measuring device is placed on the assembly table.

[0031] Advantages:

[0032] The hollow conical platform measuring device provided by the application comprises a range finder, a base, a rotating disc, a supporting seat, an extension plate, a lifting fastening screw, a connecting plate, a supporting platform and a lifting device, the supporting seat is installed on the rotating disc, the rotating disc is rotatably installed on the base, the supporting platform is installed on the side surface of the supporting seat, the extension plate is located below the supporting platform, one end of the extension plate is connected with the supporting seat, a positioning lifting groove is formed in the end of the extension plate away from the supporting seat, the lifting device is inserted into the positioning lifting groove in an up-and-down lifting mode, a threaded hole is formed in the side surface of the extension plate and communicates with the positioning lifting groove, the lifting device is fixed by screwing the lifting fastening screw into the threaded hole, the connecting plate is placed above the supporting platform, the upper end of the lifting device is connected with the connecting plate, the range finder is placed above the connecting plate, the rear end of the range finder is always in contact with the front end plane of the supporting seat, the rear end surface of the range finder when placed horizontally, the front end plane of the supporting seat, the central axis of the rotating disc and the central axis of the base are located on the same plane; the hollow conical platform measuring device is simple in structure and convenient to carry, the method for measuring the size of the large opening of the hollow conical platform by using the hollow conical platform measuring device is convenient to operate, intuitive in reading, short in measuring time and accurate in data, compared with the measurement method of wrapping the hollow conical platform with a steel tape.

[0033] The concept, specific structure and generated technical effects of the application will be further described below with reference to the drawings, so as to fully understand the purpose, features and effects of the application. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 A front view of the hollow conical platform measuring device is shown in the figure.

[0035] Figure 2 A right view of the hollow conical platform measuring device is shown in the figure.

[0036] Figure 3 A top view of the hollow conical platform measuring device is shown in the figure.

[0037] Figure 4 A front view of the supporting seat and the supporting platform is shown in the figure.

[0038] Figure 5 A top view of the supporting seat and the supporting platform is shown in the figure.

[0039] Figure 6 A front view of the extension plate is shown in the figure.

[0040] Figure 7 A top view of the extension plate is shown in the figure.

[0041] Figure 8 An application diagram of the hollow conical platform measuring device is shown in the figure.

[0042] The reference signs are as follows:

[0043] 1. Hollow truncated cone; 2. Assembly table; 3. Support pier; 4. Hollow truncated cone measuring device; 5. Base; 6. Turntable; 7. Support seat; 8. Extension plate; 9. Connecting plate; 10. Front bracket; 11. Rear bracket; 12. Connecting frame one; 13. Connecting frame two; 14. Lifting rod; 15. Support platform; 16. Positioning lifting groove; 17. Front positioning seat; 18. Lateral fastening screw; 19. Spring; 20. Longitudinal fine-tuning screw; 21. Longitudinal fine-tuning screw; 22. Lifting handrail; 23. Lifting fastening screw; 24. Handle; 25. Rangefinder. Detailed Implementation

[0044] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0045] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0046] Examples:

[0047] like Figures 1-8 As shown, in a preferred embodiment, a hollow truncated cone measuring device is provided, including a rangefinder 25, a base 5, a turntable 6, a support base 7, an extension plate 8, a lifting fastening screw 23, a connecting plate 9, a support platform 15, a lifting device, a front bracket 10, a rear bracket 11, and two springs 19. The support base 7 is mounted on the turntable 6 and is L-shaped with a vertical front end. The turntable 6 is rotatably mounted on the base 5 and is a hollow cylinder with a cover at one end. A through hole is provided at the center of the cover of the turntable 6, and a through hole is provided at the central axis of the base 5. The through holes on the turntable 6 and the base 5 are aligned and interconnected. A threaded through hole is provided on the side of the turntable 6. By screwing the transverse fastening screw 18 into the threaded through hole on the side of the turntable 6, the relative position of the turntable 6 and the base 5 is fixed. The support platform 15 is installed on the side of the support base 7. The extension plate 8 is located below the support platform 15, with one end connected to the support base 7. The end of the extension plate 8 away from the support base 7 has a positioning lifting groove 16. The lifting device can be inserted into the positioning lifting groove 16 vertically. The side of the extension plate 8 has a threaded through hole communicating with the positioning lifting groove 16. The lifting device is fixed by screwing the lifting fastening screw 23 into the threaded through hole on the side of the extension plate 8.

[0048] The lifting device comprises a first connecting frame 12, a longitudinal fine adjustment screw rod 20, a longitudinal fine adjustment screw 21, a second connecting frame 13 and a lifting rod 14, the first connecting frame 12 is in the shape of a Chinese character 'jia' and is composed of three first horizontal plates and two first vertical plates, a threaded hole is formed in the middle first horizontal plate of the first connecting frame 12, the second connecting frame 13 is in the shape of a Chinese character 'u' and is composed of two second vertical plates and a second horizontal plate, a threaded hole is formed in the second horizontal plate of the second connecting frame 13, the longitudinal fine adjustment screw 21 is fixedly connected with the longitudinal fine adjustment screw rod 20, one end of the longitudinal fine adjustment screw rod 20 is screwed into the threaded hole formed in the middle first horizontal plate of the first connecting frame 12, and the other end is screwed into the threaded hole formed in the second horizontal plate of the second connecting frame 13, the height of the laser spot can be finely adjusted by rotating the longitudinal fine adjustment screw 21, the lifting rod 14 is inserted into the positioning lifting groove 16, and the upper end of the lifting rod 14 is connected with the second connecting frame 13.

[0049] The front support 10 is in the shape of a Chinese character 'nao' and is composed of two third vertical plates and a third horizontal plate, two threaded holes are formed in the third horizontal plate of the front support 10 and the two first horizontal plates of the first connecting frame 12, the connecting plate 9, the third horizontal plate of the front support 10 and the two first horizontal plates of the first connecting frame 12 are placed in sequence from top to bottom, and are fixedly connected by fastening screws.

[0050] The connecting plate 9 is placed above the supporting platform 15, the distance meter 25 is placed above the connecting plate 9, the rear end of the distance meter 25 is always in contact with the supporting seat 7, the rear end surface of the distance meter 25 when placed horizontally, the front end surface of the supporting seat 7 (the side surface of the supporting seat 7 connected with the supporting platform 15 is the front end), the central axis of the rotating disc 6 and the central axis of the base 5 are on the same plane.

[0051] The rear support 11 is in the shape of a Chinese character 'nao' and is composed of two fourth vertical plates and a fourth horizontal plate, threaded holes are formed in the two fourth vertical plates, the rear support 11 is located below the supporting platform 15, one end of each of the two springs 19 is fixedly connected with the two third vertical plates of the front support 10, threaded holes are formed in the two sides of the supporting platform 15, the other ends of the two springs 19 are respectively connected with two screws, the two screws are screwed into the threaded holes of the two fourth vertical plates of the rear support 11 and the two sides of the supporting platform 15 in sequence, and the two springs 19 are fixedly connected with the two sides of the rear support 11 and the supporting platform 15.

[0052] The handle 24 is installed on the rear end surface of the supporting seat 7, the rotating disc 6, the supporting seat 7 and the distance meter 25 can be driven to rotate horizontally around the base 5 by the handle 24, and the lower part of the lifting rod 14 is connected with the lifting handle 22.

[0053] The end of the connecting plate 9 away from the supporting seat 7 is connected with the front positioning seat 17, and the front positioning seat 17 is located above the connecting plate 9.

[0054] The application provides a method for measuring the size of a hollow conical frustum by using the hollow conical frustum measuring device, and specifically comprises the following steps:

[0055] Step 1: Marking the large opening measuring points and the small opening measuring points

[0056] Draw a large opening reference line and a small opening reference line on the inner wall of the hollow conical frustum 1, and mark a plurality of large opening measuring points and a plurality of small opening measuring points on the large opening reference line and the small opening reference line, and the number of the large opening measuring points and the small opening measuring points is more than two;

[0057] The large opening reference line and the small opening reference line are lines where the large opening position and the small opening position of the hollow conical frustum are located;

[0058] Step 2: Placing the hollow conical frustum 1 and the hollow conical frustum measuring device 4

[0059] Draw two concentric circles with the same radius as the large opening and the small opening of the hollow conical frustum 1 on the assembly table 2, place the hollow conical frustum 1 on the assembly table 2 through the support pier 3, with the large opening at the bottom and the small opening at the top, adjust the hollow conical frustum 1 to a horizontal state through the gasket, and the intersection of the central axis of the hollow conical frustum 1 and the assembly table 2 coincides with the center of the concentric circles on the assembly table 2;

[0060] The above process can be realized by using a plumb line, and the specific process is as follows: after placing the hollow conical frustum 1 on the assembly table 2 through the support pier 3, first check and adjust the deviation of the large opening relative to the large circle on the assembly table 2, so that the deviation of the large opening relative to the large circle is basically consistent, then hang a plumb line on the small opening, check and adjust the deviation of the small opening relative to the small circle on the assembly table 2, so that the deviation of the small opening relative to the small circle is basically consistent, so that the intersection of the central axis of the hollow conical frustum 1 and the assembly table 2 coincides with the center of the concentric circles on the assembly table 2;

[0061] The large opening and the small opening of the hollow conical frustum 1 have a margin before assembly, and the flatness of the end faces where the large opening and the small opening are located is poor, so the hollow conical frustum 1 cannot be directly placed on the assembly table 2 for lofting the large opening and the small opening. It can only be placed on the support pier 3 and adjusted to be horizontal through the gasket.

[0062] Place the hollow conical frustum measuring device 4 on the assembly table 2, and the intersection of the central axis of the base 5 and the assembly table 2 coincides with the center of the concentric circles on the assembly table 2;

[0063] The specific process is as follows: a cylindrical positioning rod is used, the positioning rod is vertically inserted into the through hole at the central axis of the base 5 and the rotating disc 6, and when the contact point of the positioning rod on the assembly table 2 coincides with the center of the concentric circles on the assembly table 2, the hollow conical frustum measuring device 4 is placed on the assembly table 2.

[0064] Step 3: Measure the major radius of the hollow truncated cone 1

[0065] Step 3.1: Turn on the distance meter 25, loosen the lifting fastening screw 23, hold the lifting handle 22, raise or lower the lifting rod 14, tilt the connecting plate 9, so that the laser point emitted by the distance meter 25 falls near the major reference line of the hollow truncated cone 1, and tighten the lifting fastening screw 23;

[0066] Loosen the transverse fastening screw 18, hold the handle 24, rotate the rotating disc 6, when the laser point emitted by the distance meter 25 falls directly above or below the first major measurement point on the major reference line, tighten the transverse fastening screw 18; then, rotate the longitudinal fine adjustment screw 21, the longitudinal fine adjustment screw rod 20 will be raised and lowered through the through hole of the connecting frame one 12 and the connecting frame two 13, and can be adjusted in the vertical direction by about 5mm, until the laser point emitted by the distance meter 25 falls on the first major measurement point; press the measurement key of the distance meter 25, measure and record the inner radius R1 of the first major measurement point of the hollow truncated cone 1;

[0067] Step 3.2: Loosen the transverse fastening screw 18, hold the handle 24, rotate the rotating disc 6, when the laser point emitted by the distance meter 25 falls directly above or below the second major measurement point on the major reference line, tighten the transverse fastening screw 18; then, rotate the longitudinal fine adjustment screw 21, until the laser point emitted by the distance meter 25 falls on the second major measurement point; press the measurement key of the distance meter 25, measure and record the inner radius R2 of the second major measurement point of the hollow truncated cone 1;

[0068] Step 3.3: Similarly, according to the method of step 3.2, measure and record the inner radii R3, R4……Rn of the other major measurement points of the hollow truncated cone 1;

[0069] Step 4: Measure the minor radius of the hollow truncated cone 1

[0070] Step 4.1: Turn on the distance meter 25, loosen the lifting fastening screw 23, hold the lifting handle 22, raise the lifting rod 14, so that the laser point emitted by the distance meter 25 falls near the minor reference line of the hollow truncated cone 1, and tighten the lifting fastening screw 23;

[0071] Loosen the transverse fastening screw 18, hold the handle 24, rotate the rotating disc 6, when the laser point emitted by the distance meter 25 falls directly above or below the first minor measurement point on the minor reference line, tighten the transverse fastening screw 18; then, rotate the longitudinal fine adjustment screw 21, until the laser point emitted by the distance meter 25 falls on the first minor measurement point; press the measurement key of the distance meter 25, measure and record the inner radius r1 of the first minor measurement point of the hollow truncated cone 1;

[0072] Step 4.2: Loosen the transverse fastening screw 18, hold the handle 24, rotate the rotating disc 6, and tighten the transverse fastening screw 18 when the laser point emitted by the distance meter 25 falls on the second large opening measuring point above or below the small opening reference line; then, rotate the longitudinal fine adjustment screw 21 until the laser point emitted by the distance meter 25 falls on the second small opening measuring point; press the measuring key of the distance meter 25 to measure and record the inner radius r2 of the second small opening measuring point of the hollow conical frustum 1;

[0073] Step 4.3: Similarly, according to the method of step 4.2, measure and record the inner radii r3, r4, …, rm of the other small opening measuring points of the hollow conical frustum 1;

[0074] The existing distance meter can measure and display the slant distance, horizontal distance, height, and pitch angle relative to the measuring position (the reference set by the distance meter). The slant distance, horizontal distance, and height form a right triangle. Since the large opening and the small opening are adjusted to the horizontal state, the horizontal distance, i.e., the radius, can be calculated and displayed by measuring the slant distance and the pitch angle, or it can be directly read. Through experiments, it has been verified that the calculated horizontal distance is equal to the directly measured horizontal distance.

[0075] The manufacturing method of the hollow conical frustum measuring device provided in the embodiment is as follows:

[0076] 1. Find a round steel, and precisely machine the upper and lower two planes and the outer diameter of the round steel as the base 5. The cross section of the base 5 is in the shape of a “convex” character.

[0077] 2. Drill a through hole with a diameter of 3 mm through the center of the upper and lower planes of the base 5.

[0078] 3. Find another round steel, and precisely machine the upper and lower two planes and the inner and outer diameters of the round steel into a hollow cylindrical shape with a cover at one end as the rotating disc 6. Drill a through hole with a diameter of 3 mm at the center of the plane on the rotating disc, drill and tap two through holes with a diameter of 2 mm near the center of the plane on the rotating disc, and then drill and tap a through hole with a diameter of 2 mm on the side surface of the rotating disc.

[0079] 4. Find a copper plate, and precisely machine it into a support seat 7. The support seat 7 has an overall square structure with a small upper part and a large lower part, and the cross section is in the shape of an L. Drill and tap two holes with a diameter of 2 mm and a depth of 5 mm in the lower plane of the support seat 7. Drill and tap two holes with a diameter of 2 mm and a depth of 5 mm in the lower end of the front end plane and the rear end plane of the support seat 7 along the center line of the long axis. The upper part of the front end of the support seat 7 is connected with the support platform 15, and one hole with a diameter of 2 mm and a depth of 5 mm is drilled and tapped symmetrically on both sides of the support platform 15.

[0080] 5. Find an aluminum alloy plate, fine processing for extension plate 8, extension plate 8 cross section is "L" type, in the extension plate 8 short axis drill attack two diameter 2mm hole, in the extension plate 8 long axis front end cutting a rectangular positioning lifting groove 16, in the extension plate 8 long axis front end side, positioning lifting groove 16 corresponding to the middle position drill attack 1 diameter 2mm hole;

[0081] 6. Find an aluminum alloy plate, fine processing of 6 surface of the plate, processing into a rectangular, for connecting plate 9, in the connecting plate 9 on the symmetry drill attack two diameter 2mm hole, connecting plate 9 front end with the front positioning seat 17 connection;

[0082] 7. Find an aluminum alloy plate, processing into a right angle symmetry "concave" type bracket, respectively for front bracket 10, rear bracket 11, in the front bracket 10 both sides symmetry each drill attack a diameter of 2mm hole, in the front bracket 10 lower end symmetry each drill attack a diameter of 2mm hole, in the rear bracket 11 both sides symmetry each drill attack a diameter of 2mm hole;

[0083] 8. Find a copper plate, processing into two connecting frame, respectively for connecting frame one 12 and connecting frame two 13, connecting frame one 12 whole is symmetry "J" word shape, connecting frame two 12 whole is symmetry "U" word shape. In the connecting frame one 12 in the middle and both sides each drill attack 1 diameter 2mm hole, in the connecting frame two 12 upper end drill attack 1 diameter 2mm hole, in the connecting frame two 12 side each drill attack 1 diameter 2mm hole;

[0084] 9. Find another aluminum alloy plate, processing into a rectangular lifting rod 14, in the lifting rod 14 both ends each drill attack 1 diameter 2mm hole;

[0085] 10. When the support seat 7 lower plane of two diameter 2mm, depth 5mm hole and in the turntable 6 on the 2mm hole corresponding to the hole, through the screw connecting support seat 7 and turntable 6 fixed together; the turntable 6 is placed on the base 5 upper plane, the transverse fastening screw 18 is screwed into the turntable 6 side 2mm hole, through the transverse fastening screw 18 turntable 6 and base 5 fixed together;

[0086] 11. When the extension plate 8 short axis of two diameter 2mm hole and the front end plane of the support seat 7 of two diameter 2mm, depth 5mm hole corresponding to the hole, through the screw connecting extension plate 8 and support seat 7;

[0087] 12. One end of two springs 19 is connected with screw, the rear support 11 is placed at the lower end of the support platform 15, when the two sides of the rear support 11 symmetrically 2mm diameter hole corresponds to the two sides of the support platform 15 2mm diameter hole with 5mm depth, through the screw, one end of two springs 19 is fixed on the two sides of the rear support 11 and the support platform 15 respectively;

[0088] 13. The connecting plate 9, the front support 10 and the connecting frame one 12 are placed in turn from top to bottom, when the two sides of the connecting plate 9 symmetrically 2mm diameter hole, the two sides of the front support 10 lower end 2mm diameter hole corresponds to the two sides of the connecting frame one 12 2mm diameter hole, through the screw, the connecting plate 9, the front support 10 and the connecting frame one 12 are fixed together;

[0089] 14. The two ends of the longitudinal fine adjustment screw rod 20 are screwed into the middle 2mm hole of the connecting frame one 12 and the upper end 2mm hole of the connecting frame two 13 respectively, through the longitudinal fine adjustment screw rod 20, the connecting frame one 12 and the connecting frame two 13 are connected together; the longitudinal fine adjustment screw 21 is fixed with the longitudinal fine adjustment screw rod 20;

[0090] 15. The lifting rod 14 is placed into the positioning lifting groove 16, when the 2mm hole of one end of the lifting rod 14 corresponds to the two sides of the 2mm hole of the connecting frame two 13, through the screw, the connecting frame two 13 and the lifting rod 14 are connected together; when the lifting handle 22 corresponds to the 2mm hole of the other end of the lifting rod 14, through the screw, the lifting handle 22 and the lifting rod 14 are connected together; the lifting fastening screw 23 is screwed into the 2mm hole of the side of the extension plate 8, the lifting rod 14 is fixed on the extension plate 8;

[0091] 16. When the hole of the handle 24 corresponds to the two sides of the rear end plane of the support seat 7 two 2mm diameter hole with 5mm depth, through the screw, the handle 24 is fixed on the support seat 7;

[0092] 17. The other end of two springs 19 is connected with screw, the screw is screwed into the 2mm hole of the two sides of the front support 10; through the screw, the other end of two springs 19 is fixed on the two sides of the front support 10 respectively;

[0093] 18. The range finder 25 is placed on the connecting plate 9, the front end of the range finder 25 is close to the front positioning seat 17;

[0094] The rear end plane of the range finder 25 when placed horizontally, the front end plane of the support seat 7, the central axis of the rotating disc 6 and the central axis of the base 5 are in the same plane.

[0095] The back end of the range finder 25 is a reference for measurement and record, no matter how the range finder 25 is raised up and down, as long as any position (straight line) of the back end is in contact with the vertical reference plane (the front end plane of the support seat 7), the measurement value in the horizontal direction is equal, which is the most critical point for the success of the measurement.

[0096] In the manufacturing process of the hollow conical frustum measuring device, if the hole is drilled, it is not threaded; if the hole is drilled and tapped, it is threaded.

Claims

1. A hollow frustoconical measuring device, characterised in that, The utility model provides a kind of distance measuring instrument, including base (5), rotating disc (6), support seat (7), extension plate (8), lifting fastening screw (23), connecting plate (9), support platform (15) and lifting device, the support seat (7) is installed on the rotating disc (6), the rotating disc (6) is rotatably installed on the base (5), the support platform (15) is installed on the side of the support seat (7), the extension plate (8) is located below the support platform (15), one end is connected with the support seat (7), the extension plate (8) is equipped with positioning lifting groove (16) in the end away from the support seat (7), the lifting device is inserted into the positioning lifting groove (16) in up and down lifting, the side of the extension plate (8) is equipped with threaded hole with the positioning lifting groove (16) intercommunication, the lifting of the lifting device is realized by rotating the lifting fastening screw (23) into the threaded hole in the side of the extension plate (8) and fixed, the connecting plate (9) is placed above the support platform (15), the upper end of the lifting device is connected with the connecting plate (9), the distance measuring instrument (25) is placed above the connecting plate (9), the rear end surface of the distance measuring instrument (25) when horizontally placed, the front end plane of the support seat (7), the central axis of the rotating disc (6) and the central axis of the base (5) are on the same plane; The support seat (7) is L-shaped, and the front end plane is a vertical plane.

2. The hollow frustoconical measuring device of claim 1, wherein, The lifting device includes connecting frame one (12), longitudinal fine adjustment screw rod (20), longitudinal fine adjustment screw (21), connecting frame two (13) and lifting rod (14), the connecting frame one (12) is "J" shaped, composed of three first horizontal plates and two first vertical plates, the two side first horizontal plates of the connecting frame one (12) are connected with the connecting plate (9), the middle first horizontal plate of the connecting frame one (12) is provided with a threaded hole, the connecting frame two (13) is "U" shaped, composed of two second vertical plates and a second horizontal plate, the second horizontal plate of the connecting frame two (13) is provided with a threaded hole, the longitudinal fine adjustment screw (21) is fixedly connected with the longitudinal fine adjustment screw rod (20), one end of the longitudinal fine adjustment screw rod (20) is screwed into the threaded hole in the middle first horizontal plate of the connecting frame one (12), the other end is screwed into the threaded hole in the second horizontal plate of the connecting frame two (13), the lifting rod (14) is inserted into the positioning lifting groove (16), and the upper end of the lifting rod (14) is connected with the connecting frame two (13).

3. The hollow frustoconical measuring device of claim 2, wherein, It also includes a front support (10) in the shape of a "concave" character, which is composed of two third vertical plates and a third horizontal plate, two threaded holes are provided on the connecting plate (9), the third horizontal plate of the front support (10) and the two side first horizontal plates of the connecting frame one (12), the connecting plate (9), the front support (10) and the connecting frame one (12) are placed in order from top to bottom, and are fixed by fastening screws.

4. The hollow frustoconical measuring device of claim 3, wherein, It also includes a rear support (11) and two springs (19), the rear support (11) is "concave", the rear support (11) is composed of two fourth vertical plate and a fourth horizontal plate connection, two fourth vertical plate on the threaded hole, the rear support (11) is located below the support platform (15), two springs (19) are respectively fixed in the two third vertical plate of the front support (10), the support platform (15) both sides are provided with threaded hole, two springs (19) are respectively connected with a screw, two screws are respectively rotated into the two fourth vertical plate of the rear support (11) and the threaded hole of the support platform (15) both sides, realize two springs (19) are respectively fixed in the rear support (11) and the both sides of the support platform (15).

5. The hollow frustoconical measuring device of claim 4, wherein, The shape of the rotating disc (6) is a hollow cylindrical shape with a cover at one end, a through hole is formed at the center of the cover of the rotating disc (6), and a through hole is formed at the center axis of the base (5). The through holes formed on the rotating disc (6) and the base (5) are aligned and communicate with each other.

6. The hollow frustoconical measuring device of claim 5, wherein, A threaded hole is formed on the side surface of the rotating disc (6), and the relative position of the rotating disc (6) and the base (5) is fixed by rotating the horizontal fastening screw (18) into the threaded hole on the side surface of the rotating disc (6).

7. The hollow frustoconical measuring device of claim 2, wherein, The handle (24) is installed on the rear end surface of the support seat (7), and the lower part of the lifting rod (14) is connected with the lifting handle (22).

8. The hollow frustoconical measuring device of claim 1, wherein, The end of the connecting plate (9) away from the support seat (7) is connected with the front positioning seat (17), and the front positioning seat (17) is located above the connecting plate (9).

9. A method for measuring the size of a hollow frustum radius using the hollow frustum measuring device of claim 6, wherein, Specifically comprising the following steps: Step 1: mark the large mouth measuring point and the small mouth measuring point Draw the large mouth reference line and the small mouth reference line on the inner wall of the hollow conical table (1), and mark a plurality of large mouth measuring points and a plurality of small mouth measuring points on the large mouth reference line and the small mouth reference line, the number of large mouth measuring points and small mouth measuring points is more than two; Step 2: place the hollow conical table (1) and the hollow conical table measuring device (4) Draw two concentric circles with the same size as the large and small mouth radius of the hollow conical table (1) on the assembly table (2), place the hollow conical table (1) on the assembly table (2) through the support pier (3), the large mouth is below and the small mouth is above, adjust the hollow conical table (1) to the horizontal state through the gasket, the intersection of the center axis of the hollow conical table (1) and the assembly table (2) coincides with the center of the concentric circle on the assembly table (2); Place the hollow conical table measuring device (4) on the assembly table (2), and the intersection of the center axis of the base (5) and the assembly table (2) coincides with the center of the concentric circle on the assembly table (2); Step 3: measure the large mouth radius of the hollow conical table (1) Step 3.1: open the range finder (25), loosen the lifting fastening screw (23), raise or lower the lifting rod (14), so that the laser point emitted by the range finder (25) falls near the large mouth reference line of the hollow conical table (1), and tighten the lifting fastening screw (23). Loosen the transverse fastening screw (18), rotate the rotating disc (6), when the laser point emitted by the distance meter (25) falls on the first large opening measuring point on the large opening reference line, tighten the transverse fastening screw (18); then, rotate the longitudinal fine adjustment screw (21), until the laser point emitted by the distance meter (25) falls on the first large opening measuring point; press the measuring key of the distance meter (25), measure and record the inner radius R1 of the first large opening measuring point of the hollow conical table (1); Step 3.2: Loosen the transverse fastening screw (18), rotate the rotating disc (6), when the laser point emitted by the distance meter (25) falls on the second large opening measuring point on the large opening reference line, tighten the transverse fastening screw (18); then, rotate the longitudinal fine adjustment screw (21), until the laser point emitted by the distance meter (25) falls on the second large opening measuring point; press the measuring key of the distance meter (25), measure and record the inner radius R2 of the second large opening measuring point of the hollow conical table (1); Step 3.3: Similarly, according to the method of step 3.2, measure and record the inner radius of other large opening measuring points of the hollow conical table (1). Step 4: Measure the small opening radius of the hollow conical table (1) Step 4.1: Turn on the distance meter (25), loosen the lifting fastening screw (23), raise the lifting rod (14), so that the laser point emitted by the distance meter (25) falls near the small opening reference line of the hollow conical table (1), tighten the lifting fastening screw (23); Loosen the transverse fastening screw (18), rotate the rotating disc (6), when the laser point emitted by the distance meter (25) falls on the first small opening measuring point on the small opening reference line, tighten the transverse fastening screw (18); then, rotate the longitudinal fine adjustment screw (21), until the laser point emitted by the distance meter (25) falls on the first small opening measuring point; press the measuring key of the distance meter (25), measure and record the inner radius r1 of the first small opening measuring point of the hollow conical table (1); Step 4.2: Loosen the transverse fastening screw (18), rotate the rotating disc (6), when the laser point emitted by the distance meter (25) falls on the second large opening measuring point on the small opening reference line, tighten the transverse fastening screw (18); then, rotate the longitudinal fine adjustment screw (21), until the laser point emitted by the distance meter (25) falls on the second small opening measuring point; press the measuring key of the distance meter (25), measure and record the inner radius r2 of the second small opening measuring point of the hollow conical table (1); Step 4.3: Similarly, according to the method of step 4.2, measure and record the inner radius of other small opening measuring points of the hollow conical table (1).

10. The method of measuring the size of a hollow frustoconical taper according to claim 9, wherein, In step 2, a cylindrical positioning rod is used, the positioning rod is vertically inserted into the through hole opened at the center axis of the rotating disc (6) and the base (5), when the contact point of the positioning rod on the assembly table (2) coincides with the center of the concentric circle on the assembly table (2), the hollow conical table measuring device (4) is placed on the assembly table (2).

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