Combined external thread pitch diameter comparator

Abstract

The utility model belongs to the technical field of comparators, and discloses a combined external thread pitch diameter comparator, which comprises a test frame and a first push rod, a handle is connected in the test frame in a penetrating manner, the handle is spirally connected in the test frame, a sliding rod is fixedly connected to the outer side of the handle, a supporting ring is arranged on the outer side of the sliding rod in a penetrating manner, and the first push rod is fixedly connected with the sliding rod. The outer side of the sliding rod is fixedly connected with a testing head, the outer side of the testing head abuts against a screw tap, five sets of thread grooves are formed in the outer side of the screw tap, the screw tap is rotationally connected in the supporting ring, and the outer side of the screw tap is fixedly connected with an extension rod. The problems that due to the fact that the included angle of a thread comparator measuring head frame installation measuring head is 120 degrees, the included angle of the thread comparator measuring head frame installation measuring head is consistent with the 120-degree included angle of two adjacent blades of a three-fluted tap, and the included angle of the thread comparator measuring head frame installation measuring head is not consistent with the 72-degree included angle of two adjacent blades of a five-fluted tap, five-fluted tap products cannot be measured, machining and measuring cannot be simultaneously considered sometimes, and five-fluted tap measuring consumes much time and is low in detection efficiency are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of comparators, in particular to a combined external thread middle diameter comparator. Background Art

[0002] Three-needle measurement of the middle diameter of external threads is an indirect method of measuring the middle diameter of threads. During measurement, three high-precision measuring needles of the same diameter are placed in the tooth groove of the measured thread. The dimensions are measured using measuring instruments for measuring external dimensions such as micrometers, mechanical comparators, optical comparators, and length gauges. The middle diameter of the thread is then calculated based on the pitch, tooth profile half angle, and measuring needle diameter of the measured thread.

[0003] At the same time, the patent application number 201220308593.4 discloses a thread strength tester, including a frame, a guide rail, a simulation measuring device with convex and concave plates on the opposite sides respectively matching V-shaped blades and taps; a main scale, and two travel frames on the opposite sides respectively matching concave and convex probes with V-shaped blades and taps, and a mid-diameter measuring device of the measuring instrument in contact with the travel frame. The combined gauge block is placed between the concave and convex plates, so that the size between the V-shaped blade grooves is equal to the standard mid-diameter size, and then the concave and convex probes are respectively in close contact with the V-shaped blade grooves, and then the concave and convex probes are used to measure the internal thread.

[0004] However, the above-mentioned problems were discovered during the implementation of relevant technologies. The measuring tool is a thread micrometer. Since the probe angle of the thread comparator probe holder is 120°, which is consistent with the 120° angle between two adjacent blades of a 3-slot tap, but inconsistent with the 72° angle between two adjacent blades of a 5-slot tap, it is impossible to measure 5-slot tap products. It takes at least 3 minutes to measure each product, which sometimes results in that processing and measurement cannot be taken into account at the same time. In addition, 5-pin measurement is time-consuming and has low detection efficiency. Utility Model Content

[0005] In order to solve the problems raised in the above-mentioned background technology, the utility model provides a combined external thread middle diameter comparator, which has the advantages of changing the included angle of the two probes from 120° to 72°, which is consistent with the included angle of the two adjacent cutting edges of a 5-groove tap, thereby manufacturing a combined external thread middle diameter comparator, shortening the detection time and improving the detection efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combined external thread middle diameter comparator, comprising a test frame and a first push rod, a handle is connected through the inside of the test frame, the handle is spirally connected inside the test frame, a sliding rod is fixedly connected to the outside of the handle, a support ring is arranged through the outside of the sliding rod, a test head is fixedly connected to the outside of the sliding rod, a tap is tightly arranged on the outside of the test head, five groups of thread grooves are opened on the outside of the tap, the tap is rotatably connected inside the support ring, and an extension rod is fixedly connected to the outside of the tap.

[0007] Preferably, a base is provided on the outer side of the first push rod, a cavity is opened inside the base, a buckle is rotatably connected to the outer side of the base, the outer side of the buckle rotates in mesh with the first push rod, a clamping rod is fixedly connected to the top end of the base, and a connecting plate is fixedly connected to the top end of the clamping rod.

[0008] Preferably, a first fixed block is fixedly connected to the top of the connecting plate, a circular hole groove is provided inside the first fixed block, a sliding rod is slidably connected inside the circular hole groove of the first fixed block, and an anti-slip groove is provided outside the sliding rod.

[0009] Preferably, five groups of abutment rods are arranged on the outer side of the tap, and the abutment rods are evenly arranged around the tap and arranged in a circumferential direction.

[0010] Preferably, the interval angle of each group of the abutment rods is 72°, and the angle between the two groups of test heads is consistent with the angle between two adjacent cutting edges of the tap.

[0011] Preferably, a scale is fixedly connected to the top of the test stand, and anti-slip grooves are provided on the outer sides of the handle and the second push rod.

[0012] Preferably, the outer side of the support ring is fixedly connected with a support seat, the support seat, the slide rod is slidably connected inside the support seat, and the outer side of the slide rod is sleeved with a second fixed block.

[0013] Preferably, the top end of the second fixing block is fixedly connected with a second connecting plate, and the top end of the second connecting plate is provided with a second push rod.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model improves the thread comparator base and the 5-groove tap, and improves the probe angle to 72° to match the 5-groove tap blade, so that the parameters related to the middle diameter of the 5-groove tap product can be quickly measured, and the measurement efficiency is improved.

[0016] 2. The utility model detects the taps by setting five groups of detection heads, thereby improving the accuracy of detection and solving the problem of a combined external thread diameter comparator. The utility model has the advantages of changing the angle between the two probes from 120° to 72°, which is consistent with the angle between the two adjacent blades of a 5-groove tap, making a 5-groove tap, shortening the detection time and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the first connecting plate of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the test stand of the utility model;

[0020] Figure 4 This is a schematic diagram of the first push rod structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the handle structure of the utility model;

[0022] Figure 6 It is a schematic diagram of the structure of the tap of the utility model.

[0023] In the figure: 1. test stand; 2. handle; 3. scale; 4. support ring; 5. tap; 6. first fixed block; 7. slide rod; 8. support seat; 9. second fixed block; 10. first connecting plate; 11. first push rod; 12. base; 13. buckle; 14. tightening rod; 15. test head; 16. second push rod; 17. second connecting plate; 18. extension rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figures 1 to 6 As shown, the utility model provides a combined external thread middle diameter comparator, including a test frame 1 and a first push rod 11, a handle 2 is connected to the inside of the test frame 1, the handle 2 is spirally connected to the inside of the test frame 1, the outer end of the handle 2 is connected to the slide bar 7, the outer side of the slide bar 7 is penetrated by a support ring 4, the outer side of the slide bar 7 is connected to a test head 15, a tap 5 can be tightly arranged on the outer side of the test head 15 to measure the tap 5, five groups of thread grooves are opened on the outer side of the tap 5, the tap 5 is rotatably connected inside the support ring 4, the tap 5 is welded to the outside of the extension rod 18, the tap 5 is driven to be placed inside the test head 15 by holding the extension rod 18, and the tap 5 is rotated with the outer test head 15 to achieve rapid measurement.

[0026] The outer side of the base 12 is rotatably connected with a buckle 13, and the bottom end of the buckle 13 has a protrusion to push the first push rod 11. Specifically, a base 12 is provided on the outer side of the first push rod 11, and a cavity is opened inside the base 12. When it slides toward the base 12, the gear on the outer side of the first push rod 11 meshes and rotates with the gear on the rear side of the buckle 13 on the outer side of the base 12. When it rotates to the required position, the first connecting plate 10 is welded to the top end of the tightening rod 14.

[0027] Furthermore, a first fixed block 6 is welded to the top of the first connecting plate 10, a circular hole groove is provided inside the first fixed block 6, a sliding rod 7 is slidably connected inside the circular hole groove of the first fixed block 6, an anti-slip groove is provided outside the sliding rod 7, and the sliding rod 7 can be slid inside the first fixed block 6 by holding the sliding rod 7.

[0028] Furthermore, five groups of test heads 15 are arranged on the outside of the tap 5 , and the test heads 15 are evenly arranged around the tap 5 in a circumferential direction.

[0029] It is worth noting that the interval angle of each group of test heads 15 is 72 degrees, and the angle between two adjacent edges of the tap 5 between two groups of test heads 15 is consistent, which facilitates the detection of the tap 5.

[0030] It is worth noting that a scale 3 is fixedly connected to the top of the test stand 1 , and anti-slip grooves are provided on the outer sides of the handle 2 and the second push rod 16 , and the numerical values ​​can be recorded by looking at the scale 3 .

[0031] It is worth mentioning that a support seat 8 is welded to the outer side of the support ring 4 , the slide rod 7 is slidably connected inside the support seat 8 , a second fixed block 9 is sleeved on the outer side of the slide rod 7 , and the slide rod 7 slides inside the second fixed block 9 .

[0032] It is worth emphasizing that the top end of the second fixing block 9 is welded to the second connecting plate 17 , and a second push rod 16 is provided at the top end of the second connecting plate 17 , and the second fixing block 9 is pushed by the second push rod 16 .

[0033] Working principle:

[0034] First, the staff places the tap 5 inside the support ring 4, and rotates the handle 2 on the outside of the test frame 1. When the handle 2 is rotated clockwise, the handle 2 drives the sliding rod 7 fixed and welded on the outside to move toward the support ring 4. The sliding rod 7 drives the test head 15 to slide inside the support ring 4. The test head 15 slowly approaches the tap 5, and then pushes the first push rod 11 to slide toward the base 12. The gear on the outside of the first push rod 11 meshes and rotates with the gear on the rear side of the screw buckle 13 on the outside of the base 12. When it is rotated to the required position, the screw buckle is rotated. 13. At this time, the protrusion at the bottom of the screw button 13 is pressed against the gear inside the first push rod 11 and pressed against it to prevent the first push rod 11 from moving. The first push rod 11 pushes the pressing rod 14 at the top to slide upward, and the pressing rod 14 pushes the first connecting plate 10 to move toward the support ring 4. At this time, the sliding rod 7 inside the second fixed block 9 at the top of the first connecting plate 10 is pushed toward the tap 5. Similarly, the sliding rod 7 inside the first fixed block 6 is pushed toward the tap 5. At this time, the scale 3 at the top of the test stand 1 is observed and recorded.

[0035] Then, push the second push rod 16 toward the inside of the support ring 4, and the second push rod 16 pushes the second connecting plate 17 to move, and finally move the two groups of test heads 15 at the bottom of the second connecting plate 17 toward the direction of the support ring 4. When the installation is completed, hold the extension rod 18 to drive the tap 5 to be placed inside the test head 15, and by rotating the tap 5 and the outer test head 15, fast measurement can be achieved.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined external thread pitch diameter comparator, comprising a test stand (1) and a first push rod (11), characterized in that: The inside of the test frame (1) is connected with a handle (2), the handle (2) is spirally connected inside the test frame (1), the outside of the handle (2) is fixedly connected with a slide bar (7), the outside of the slide bar (7) is provided with a support ring (4), the outside of the slide bar (7) is fixedly connected with a test head (15), the outside of the test head (15) is tightly provided with a tap (5), the outside of the tap (5) is provided with five groups of thread grooves, the tap (5) is rotatably connected inside the support ring (4), and the outside of the tap (5) is fixedly connected with an extension rod (18).

2. A combined external thread pitch diameter comparator according to claim 1, characterized in that: A base (12) is arranged on the outer side of the first push rod (11), a cavity is opened inside the base (12), a buckle (13) is rotatably connected to the outer side of the base (12), the outer side of the buckle (13) is meshed and rotatably engaged with the first push rod (11), a clamping rod (14) is fixedly connected to the top end of the base (12), and a first connecting plate (10) is fixedly connected to the top end of the clamping rod (14).

3. A combined external thread pitch diameter comparator according to claim 2, characterized in that: The top end of the first connecting plate (10) is fixedly connected to a first fixing block (6), a circular hole groove is provided inside the first fixing block (6), a sliding rod (7) is slidably connected inside the circular hole groove of the first fixing block (6), and an anti-slip groove is provided on the outer side of the sliding rod (7).

4. A combined external thread pitch diameter comparator according to claim 1, characterized in that: Five groups of test heads (15) are arranged on the outside of the tap (5), and the test heads (15) are evenly arranged around the tap (5) in a circumferential direction.

5. A combined external thread pitch diameter comparator according to claim 4, characterized in that: The interval angle of each group of the test heads (15) is 72°, and the angles of two adjacent cutting edges of the angle taps (5) between the test heads (15) are consistent.

6. The combined external thread pitch diameter comparator according to claim 1, characterized in that: A scale (3) is fixedly connected to the top of the test stand (1), and anti-slip grooves are provided on the outsides of the handle (2) and the second push rod (16).

7. The combined external thread pitch diameter comparator according to claim 1, characterized in that: The outer side of the support ring (4) is fixedly connected to a support seat (8), the support seat (8), the slide rod (7) is slidably connected inside the support seat (8), and the outer side of the slide rod (7) is sleeved with a second fixed block (9).

8. The combined external thread pitch diameter comparator according to claim 7, characterized in that: The top end of the second fixing block (9) is fixedly connected to a second connecting plate (17), and the top end of the second connecting plate (17) is provided with a second push rod (16).

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