Circular truncated cone diameter detection ruler

Abstract

The utility model discloses a circular truncated cone diameter detection ruler which is characterized in that the detection ruler comprises a ruler body, the ruler body is composed of two parallel ruler rods (1), a central connecting mechanism is arranged in the middle of the two ruler rods (1), a supporting mechanism and an adjusting mechanism are arranged at the two ends of the two ruler rods (1) respectively, and the central connecting mechanism comprises a first upper clamping block (2) and a first lower clamping block (3). The first upper clamping block (2) is rotatably connected with a first bolt, the bottom end of the first bolt is in threaded connection with the first lower clamping block (3), and the bottom of the first upper clamping block (2) and the top of the first lower clamping block (3) are both provided with positioning grooves matched with the ruler rod (1) in shape.

Description

Technical Field

[0001] This utility model relates to the field of inspection tools, and in particular to a scale for measuring the diameter of a frustum. Background Technology

[0002] Before a product leaves the factory, its dimensions, precision, and other parameters must be inspected. Only products that pass the inspection can be shipped. For certain frustum-shaped parts, the diameter of its outer wall at different heights is one of the important parameters that needs to be inspected. Therefore, it must be inspected before the part can leave the factory. Traditionally, when inspecting the diameter of the outer wall of frustum-shaped parts, a measuring ruler is used. This measuring ruler is supported on the top surface of the frustum by a support structure. After the measuring structures on both sides are adjusted to the same height, the inspection can be carried out.

[0003] However, traditional measuring rulers have certain problems in use. Their support structures are mostly designed for solid frustum parts. They are not suitable for hollow frustum parts (with a ring-shaped cross-section). In addition, the support structure needs to ensure multi-point support to ensure that the support surface is coplanar with the top surface of the frustum. However, the traditional support structure is relatively simple, consisting of only a few legs. Often, after support, there is an angle between the ruler rod and the support surface, which affects the accuracy of the test results.

[0004] At the same time, when it is necessary to adjust the relative position of the detection structure, the relatively complex detection structure makes the operation time-consuming and laborious, which seriously affects the operation efficiency.

[0005] Therefore, a method or apparatus is needed to solve the above problems. Utility Model Content

[0006] This invention aims to address the aforementioned shortcomings of existing technologies by proposing a frustum diameter measuring ruler that features a simple structure, ingenious design, reasonable layout, rapid operation, improved work efficiency, and effective assurance of detection accuracy.

[0007] The technical solution of this utility model is: a scale for measuring the diameter of a frustum, characterized in that: the scale includes a scale body, which is composed of two parallel scale rods 1, a central connecting mechanism is provided in the middle of the two scale rods 1, and a support mechanism and an adjustment mechanism are respectively provided at both ends.

[0008] The central connecting mechanism includes a first upper clamping block 2 and a first lower clamping block 3. A first bolt is rotatably connected to the first upper clamping block 2, and the bottom end of the first bolt is threadedly connected to the first lower clamping block 3. Positioning grooves matching the shape of the ruler rod 1 are provided at the bottom of the first upper clamping block 2 and the top of the first lower clamping block 3.

[0009] The support mechanism includes a second upper clamping block 4 and a second lower clamping block 5. A second bolt 6 is rotatably connected to the second upper clamping block 4, and the bottom end of the second bolt 6 is threadedly connected to the second lower clamping block 5. Positioning grooves matching the shape of the ruler 1 are provided at the bottom of the second upper clamping block 4 and the top of the second lower clamping block 5. A support block 7 is fixedly connected to the bottom end of the second lower clamping block 5, and a third bolt 8 is threadedly connected to the middle of the support block 7. An adaptive support mechanism is provided on both sides of the support block 7.

[0010] The adaptive support mechanism includes a longitudinal hole 9 formed in the support block 7, a support column 10 movably connected within the longitudinal hole 9, a spring 11 connected to the top of the support column 10, and the top of the spring 11 connected to a plug 12 fixedly connected within the longitudinal hole 9. The adaptive support mechanism also includes a locking screw 13 threaded onto the support block 7, the end of which can contact the side wall of the support column 10.

[0011] The adjusting mechanism includes a third upper clamping block 14 and a third lower clamping block 15. Two first clamping block fixing shafts 16 are symmetrically arranged within the third upper clamping block 14, each first clamping block fixing shaft 16 passing through the top opening of an upper and lower clamping block connecting member 17. Two upper and lower clamping drive shafts 18 are rotatably connected within the third lower clamping block 15. Each upper and lower clamping drive shaft 18 has a first eccentric section 19, which is movably connected to a circular hole at the bottom of its corresponding upper and lower clamping block connecting member 17. Positioning grooves matching the shape of the ruler rod 1 are provided at the bottom of the third upper clamping block 14 and the top of the third lower clamping block 15.

[0012] The adjusting mechanism also includes a sleeve 20, which is fixedly connected to a third upper clamping block 14 via a second clamping block fixing shaft 21. The sleeve 20 is longitudinally distributed and located between two ruler rods 1. A measuring ruler 22 and a movable clamping block 23 are movably connected within the sleeve 20. The measuring ruler 22 can move longitudinally relative to the sleeve 20, and the movable clamping block 23 can move horizontally relative to the sleeve 20. An adjusting clamping drive shaft 24 is rotatably connected within the third upper clamping block 14. A second eccentric section 25 is provided on the adjusting clamping drive shaft 24, which is movably connected to a circular hole in the movable clamping block 23. The end of the movable clamping block 23 matches the side wall of the measuring ruler 22, and a connecting hole is provided at the bottom end of the measuring ruler 22.

[0013] Of the two adjustment mechanisms, a fixed measuring shaft 26 is provided in the bottom connection hole of the measuring scale 22 of one of them, and a dial indicator 27 is provided in the bottom connection hole of the measuring scale 22 of the other.

[0014] The bottom of the measuring ruler 22 is provided with a limiting step 28, and a positioning pad 29 is provided on the bottom surface of the third lower clamping block 15 above the limiting step 28. A height calibration block 30 is provided between the limiting step 28 and the positioning pad 29.

[0015] The ruler 1, sleeve 20 and measuring ruler 22 are all made of carbon fiber.

[0016] The central connecting mechanism consists of multiple components that are evenly spaced.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] This type of frustum diameter measuring ruler features a simple structure, ingenious design, and rational layout. It addresses the problems inherent in traditional frustum-shaped part measuring rulers during operation by incorporating a unique structure. Firstly, it uses carbon fiber for the ruler rod and measuring scale, significantly reducing overall weight while maintaining sufficient rigidity and strength, making operation more convenient. Secondly, its support mechanism employs an adaptive support structure design, ensuring that during each measurement, three points in a single support mechanism are simultaneously in contact with the support surface, thus achieving stable support and ensuring accurate measurement results. Simultaneously, its adjustment mechanism utilizes a positioning structure with an eccentric shaft, enabling quick and convenient locking or unlocking, effectively improving work efficiency. Furthermore, this frustum diameter measuring ruler has a simple manufacturing process and low production cost. Therefore, it possesses numerous advantages, making it particularly suitable for widespread application in this field, with a very broad market prospect. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model.

[0020] Figure 2 This is a schematic diagram (three-dimensional view) of the working state of an embodiment of this utility model.

[0021] Figure 3 This is a schematic diagram (front view) of the working state of an embodiment of this utility model.

[0022] Figure 4 This is a structural schematic diagram of the support mechanism in an embodiment of this utility model.

[0023] Figure 5 This is a three-dimensional structural diagram of the adjustment mechanism in an embodiment of this utility model.

[0024] Figure 6 This is a cross-sectional view (longitudinal direction) of the adjustment mechanism in an embodiment of this utility model.

[0025] Figure 7This is a cross-sectional view (horizontal direction) of the adjustment mechanism in an embodiment of this utility model. Detailed Implementation

[0026] The specific embodiments of this utility model will be described below with reference to the accompanying drawings. Figures 1 to 7 As shown: A frustum diameter measuring ruler includes a ruler body composed of two parallel ruler rods 1. A central connecting mechanism is provided in the middle of the two ruler rods 1, and a support mechanism and an adjustment mechanism are respectively provided at both ends.

[0027] The central connecting mechanism includes a first upper clamping block 2 and a first lower clamping block 3. A first bolt is rotatably connected to the first upper clamping block 2, and the bottom end of the first bolt is threadedly connected to the first lower clamping block 3. Positioning grooves matching the shape of the ruler rod 1 are provided at the bottom of the first upper clamping block 2 and the top of the first lower clamping block 3.

[0028] The support mechanism includes a second upper clamping block 4 and a second lower clamping block 5. A second bolt 6 is rotatably connected to the second upper clamping block 4, and the bottom end of the second bolt 6 is threadedly connected to the second lower clamping block 5. Positioning grooves matching the shape of the ruler 1 are provided at the bottom of the second upper clamping block 4 and the top of the second lower clamping block 5. A support block 7 is fixedly connected to the bottom end of the second lower clamping block 5, and a third bolt 8 is threadedly connected to the middle of the support block 7. An adaptive support mechanism is provided on both sides of the support block 7.

[0029] The adaptive support mechanism includes a longitudinal hole 9 formed in the support block 7, a support column 10 movably connected within the longitudinal hole 9, a spring 11 connected to the top of the support column 10, and the top of the spring 11 connected to a plug 12 fixedly connected within the longitudinal hole 9. The adaptive support mechanism also includes a locking screw 13 threaded onto the support block 7, the end of which can contact the side wall of the support column 10.

[0030] The adjusting mechanism includes a third upper clamping block 14 and a third lower clamping block 15. Two first clamping block fixing shafts 16 are symmetrically arranged within the third upper clamping block 14, each first clamping block fixing shaft 16 passing through the top opening of an upper and lower clamping block connecting member 17. Two upper and lower clamping drive shafts 18 are rotatably connected within the third lower clamping block 15. Each upper and lower clamping drive shaft 18 has a first eccentric section 19, which is movably connected to a circular hole at the bottom of its corresponding upper and lower clamping block connecting member 17. Positioning grooves matching the shape of the ruler rod 1 are provided at the bottom of the third upper clamping block 14 and the top of the third lower clamping block 15.

[0031] The adjusting mechanism also includes a sleeve 20, which is fixedly connected to a third upper clamping block 14 via a second clamping block fixing shaft 21. The sleeve 20 is longitudinally distributed and located between two ruler rods 1. A measuring ruler 22 and a movable clamping block 23 are movably connected within the sleeve 20. The measuring ruler 22 can move longitudinally relative to the sleeve 20, and the movable clamping block 23 can move horizontally relative to the sleeve 20. An adjusting clamping drive shaft 24 is rotatably connected within the third upper clamping block 14. A second eccentric section 25 is provided on the adjusting clamping drive shaft 24, which is movably connected to a circular hole in the movable clamping block 23. The end of the movable clamping block 23 matches the side wall of the measuring ruler 22, and a connecting hole is provided at the bottom end of the measuring ruler 22.

[0032] Of the two adjustment mechanisms, a fixed measuring shaft 26 is provided in the bottom connection hole of the measuring scale 22 of one of them, and a dial indicator 27 is provided in the bottom connection hole of the measuring scale 22 of the other.

[0033] The bottom of the measuring ruler 22 is provided with a limiting step 28, and a positioning pad 29 is provided on the bottom surface of the third lower clamping block 15 above the limiting step 28. A height calibration block 30 is provided between the limiting step 28 and the positioning pad 29.

[0034] The ruler 1, sleeve 20 and measuring ruler 22 are all made of carbon fiber.

[0035] The central connecting mechanism consists of multiple components that are evenly spaced.

[0036] The working process of the frustum diameter measuring ruler of this utility model embodiment is as follows: When it is necessary to measure the outer wall diameter of the frustum workpiece 31, firstly, take a standard workpiece (a product with qualified dimensions) to calibrate the measuring ruler. During calibration, place the ruler body as a whole on the top surface of the workpiece 31, ensuring that the support mechanisms at both ends are in contact with the top surface of the workpiece 31 at the same time. Then, select a suitable length of equal height calibration block 30 according to the height difference between the position to be measured and the top surface of the workpiece 31, and adjust the relative position of the measuring ruler 22 relative to the ruler rod 1 (vertical direction) to ensure that the probes of the fixed measuring axis 26 and the dial indicator 27 are coaxial. Then, adjust the relative position of the adjustment mechanism on the ruler rod 1 (horizontal direction) to ensure that the probes of the fixed measuring axis 26 and the dial indicator 27 can both contact the outer wall of the workpiece 31. Finally, zero the dial indicator 27, and the calibration is completed.

[0037] When it is necessary to inspect the workpiece 31, simply place this measuring ruler on the workpiece 31, ensuring that the support mechanism can contact the top surface of the workpiece 31, and fix the measuring shaft 26 and the probe of the dial indicator 27 to contact the outer wall of the workpiece 31 at the same time. Then observe the reading on the dial indicator 27. If the reading exceeds the allowable error range, it means that the workpiece 31 is a defective product. Conversely, if the reading does not exceed the allowable error range, it means that the workpiece 31 is a qualified product.

[0038] In order to improve the overall strength and rigidity of the ruler, this measuring ruler is composed of two parallel ruler rods 1. The middle of these two rods 1 are fixedly connected by a central connecting mechanism. When connecting, it is only necessary to drive the first bolt to rotate in the first upper clamping block 2, and the first lower clamping block 3, which is threaded to it, will move upward along its axis, that is, the first lower clamping block 3 moves towards the first upper clamping block 2, thereby achieving the purpose of clamping the two ruler rods 1 at the same time.

[0039] The second upper clamping block 4 and the second lower clamping block 5 in the support mechanism are also fixedly connected to the two ruler rods 1 in the same way. When the support mechanism contacts the top surface of the workpiece 31, the third bolt 8 is driven to rotate by a screwdriver. Since the third bolt 8 is threadedly connected to the support block 7, the third bolt 8 will also move linearly relative to the support block 7 while rotating, driving the third bolt 8 to move downward relative to the support block 7. The bottom end of the third bolt 8 directly contacts the top surface of the workpiece 31. Under the action of the third bolt 8, there is a certain gap between the support block 7 and the workpiece 31, and the two support columns 10 will remain extended under the action of the spring 11 above them. That is to say, as long as the gap between the support block 7 and the workpiece 31 does not exceed the maximum stroke of the support column 10, the two support columns 10 will always be in contact with the top surface of the workpiece 31. This structure can ensure that there are three support points in each support mechanism that are in contact with the workpiece 31. After the third bolt 8 is properly adjusted, the two locking screws 13 are tightened respectively to lock and position the two support columns 10. At this time, the workpiece 31 forms a stable support for the support mechanism.

[0040] When the adjustment mechanism needs to be driven to move along the length of the ruler 1 (horizontal movement), the two upper and lower clamping drive shafts 18 on the adjustment mechanism are turned on respectively. Since the first eccentric section 19 on the upper and lower clamping drive shaft 18 is rotatably connected to the round hole at the bottom of the upper and lower clamping block connector 17, it will pull the upper and lower clamping block connector 17 to move. The top of the upper and lower clamping block connector 17 is fixedly connected to the third upper clamping block 14 through the first clamping block fixing shaft 16. Therefore, the above action will eventually drive the third upper clamping block 14 to move up or down relative to the third lower clamping block 15. That is to say, the two upper and lower clamping drive shafts 18 can control the distance between the third upper clamping block 14 and the third lower clamping block 15 (non-clamping state) and the proximity (clamping state). When the two are in the non-clamping state, the adjustment mechanism can reciprocate along the length of the ruler 1, thereby adjusting the relative position between the fixed measuring shaft 26 or dial indicator 27 connected to the bottom of the adjustment mechanism and the workpiece 31. After the adjustment is completed, the upper and lower clamping drive shafts 18 are rotated in the opposite direction to fix the adjustment mechanism back to the ruler 1.

[0041] When it is necessary to adjust the relative position of the measuring scale 22 in the longitudinal direction (i.e., when adjusting the fixed measuring shaft 26 or dial indicator 27 located at the bottom of the measuring scale 22), this is also achieved by rotating the clamping drive shaft 24. When the clamping drive shaft 24 rotates, the second eccentric section 25 on it drives the movable clamping block 23 to move horizontally. When the side of the movable clamping block 23 contacts the side wall of the measuring scale 22, the measuring scale 22 is clamped and fixed by the movable clamping block 23 and the inner wall of the sleeve 20 (or the fixed clamping block set on the inner wall of the sleeve 20). Conversely, when the side of the movable clamping block 23 disengages from the measuring scale 22, the measuring scale 22 regains its degree of freedom and can make longitudinal relative movements within the sleeve 20. After adjusting to the appropriate position, it can be clamped again using the movable clamping block 23.

Claims

1. A scale for measuring the diameter of a frustum, characterized in that: The measuring ruler includes a ruler body, which is composed of two parallel ruler rods (1). A central connecting mechanism is provided in the middle of the two ruler rods (1), and a support mechanism and an adjustment mechanism are respectively provided at both ends. The central connecting mechanism includes a first upper clamping block (2) and a first lower clamping block (3). A first bolt is rotatably connected to the first upper clamping block (2), and the bottom end of the first bolt is threadedly connected to the first lower clamping block (3). Positioning grooves matching the shape of the ruler (1) are provided at the bottom of the first upper clamping block (2) and the top of the first lower clamping block (3). The support mechanism includes a second upper clamping block (4) and a second lower clamping block (5). A second bolt (6) is rotatably connected to the second upper clamping block (4). The bottom end of the second bolt (6) is threadedly connected to the second lower clamping block (5). Positioning grooves matching the shape of the ruler (1) are provided at the bottom of the second upper clamping block (4) and the top of the second lower clamping block (5). A support block (7) is fixedly connected to the bottom end of the second lower clamping block (5). A third bolt (8) is threadedly connected to the middle of the support block (7). An adaptive support mechanism is provided on both sides of the support block (7). The adaptive support mechanism includes a longitudinal hole (9) formed in the support block (7), a support column (10) movably connected in the longitudinal hole (9), a spring (11) connected to the top of the support column (10), and the top of the spring (11) being connected to a plug (12) fixedly connected in the longitudinal hole (9). The adaptive support mechanism also includes a locking screw (13) threadedly connected to the support block (7), the end of which can contact the side wall of the support column (10). The adjustment mechanism includes a third upper clamping block (14) and a third lower clamping block (15). Two first clamping block fixing shafts (16) are symmetrically arranged inside the third upper clamping block (14). Each first clamping block fixing shaft (16) passes through the top opening of an upper and lower clamping block connector (17). Two upper and lower clamping drive shafts (18) are rotatably connected inside the third lower clamping block (15). A first eccentric section (19) is provided on each upper and lower clamping drive shaft (18). The first eccentric section (19) is movably connected to a circular hole at the bottom of the corresponding upper and lower clamping block connector (17). Positioning grooves matching the shape of the ruler (1) are provided at the bottom of the third upper clamping block (14) and the top of the third lower clamping block (15). The adjustment mechanism also includes a sleeve (20), which is fixedly connected to a third upper clamping block (14) via a second clamping block fixing shaft (21). The sleeve (20) is longitudinally distributed and located between two ruler rods (1). A measuring ruler (22) and a movable clamping block (23) are movably connected inside the sleeve (20). The measuring ruler (22) can move longitudinally relative to the sleeve (20), and the movable clamping block (23) can move horizontally relative to the sleeve (20). An adjustment clamping drive shaft (24) is rotatably connected inside the third upper clamping block (14). A second eccentric section (25) is provided on the adjustment clamping drive shaft (24). The second eccentric section (25) is movably connected in a circular hole opened on the movable clamping block (23). The end of the movable clamping block (23) matches the side wall of the measuring ruler (22). A connecting hole is provided at the bottom end of the measuring ruler (22). The two adjustment mechanisms have a fixed measuring shaft (26) installed in the bottom connection hole of the measuring scale (22) of one of them, and a dial indicator (27) installed in the bottom connection hole of the measuring scale (22) of the other.

2. The frustum diameter measuring ruler according to claim 1, characterized in that: The bottom of the measuring ruler (22) is provided with a limiting step (28), and a positioning pad (29) is provided on the bottom surface of the third lower clamping block (15) above the limiting step (28). A height calibration block (30) is provided between the limiting step (28) and the positioning pad (29).

3. The frustum diameter measuring ruler according to claim 1, characterized in that: The ruler (1), sleeve (20) and measuring ruler (22) are all made of carbon fiber.

4. The frustum diameter measuring ruler according to claim 1, characterized in that: The central connecting mechanism consists of multiple components that are evenly spaced.

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