External diameter measuring instrument

Abstract

The utility model relates to the technical field of detecting instruments, in particular to an external diameter measuring instrument, which at least solves the problem of how to conveniently and repeatedly verify the external diameter of a workpiece. The instrument for measuring the outer diameter comprises a base, wherein the base is provided with a vertically upward stand column; the positioning table is arranged on the base, the positioning table is provided with a horizontal supporting plane, two positioning clamps are further arranged on the positioning table, each positioning clamp is provided with two clamping blocks which are arranged on the positioning table in a sliding mode, the clamping blocks vertically and upwards extend to the position above the supporting plane, and the two clamping blocks are connected with a driving device at the same time; the driving device is used for synchronously driving the two clamping blocks to move oppositely or oppositely, the two positioning clamps are linearly arranged on the positioning table, and the arrangement mode is that the central axes of the moving paths of the clamping blocks of the two positioning clamps coincide in the horizontal direction; the gauge stand can be arranged on the stand column in an up-down sliding manner; and the measuring meter is arranged on the meter seat, and a probe of the measuring meter vertically points to the central axis of the moving path of the clamping block downwards.

Description

Technical Field

[0001] The utility model relates to the technical field of detection instruments, in particular to an instrument for measuring the outer diameter. Background Art

[0002] For many workpiece products in our company, it is necessary to repeatedly verify the diameter of the products to determine whether the processing dimensions are qualified.

[0003] For example, for CNC cutting tool products, CNC cutting tools (including milling cutters, boring cutters, drilling cutters, thread cutters, and tool holders, etc.) have a round shaft part and a conical part. At the same time, the outer diameter of these round shaft parts and the taper of the conical part also need to be measured and verified. Generally, a vernier caliper is used for the outer diameter of the round shaft part, but the measurement of the taper is relatively inconvenient.

[0004] There are also some other product components with larger shaft diameters. Due to their large external dimensions, it is very inconvenient to repeatedly detect and verify them with a vernier caliper.

[0005] In view of this, it is necessary to develop a special measuring instrument that is convenient for repeatedly verifying the outer diameter of workpieces. Summary of the Utility Model

[0006] The purpose of the utility model is to provide an instrument for measuring the outer diameter, which at least solves the problem of how to conveniently achieve repeated verification of the external diameter of workpieces.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An instrument for measuring the outer diameter includes: a base, on which a vertically upward column is provided; a positioning table, arranged on the base, the positioning table is provided with a horizontal supporting plane, and two positioning clamps are also arranged on the positioning table. Each positioning clamp has two clamping blocks slidably arranged on the positioning table, and the clamping blocks extend vertically upward above the supporting plane. The two clamping blocks are simultaneously connected to a driving device, and the driving device is used to synchronously drive the two clamping blocks to move towards or away from each other. The two positioning clamps are arranged in a line on the positioning table, and the arrangement method is that the central axes of the moving paths of the clamping blocks of the two positioning clamps coincide in the horizontal direction; a dial indicator base, which can slide up and down on the column; a measuring dial indicator, arranged on the dial indicator base, and the probe of the measuring dial indicator points vertically downward to the central axis of the moving path of the clamping block.

[0009] Based on the above solution and as a preferred solution to the above solution: On two opposite sides of the column, first sliding rails are vertically arranged; the table base includes a base body and a mounting arm arranged on the base body. The middle part of the base body is a hollow part, and two vertically arranged first sliding grooves are arranged inside the hollow part; the column is inserted into the hollow part, the first sliding grooves are in sliding fit with the first sliding rails, and the mounting arm extends upward towards the positioning table.

[0010] Based on the above solution and as a preferred solution to the above solution: At one end of the mounting arm away from the column, there are a mounting hole, a cutting groove, a through hole and a threaded hole. The mounting hole is vertically arranged. The cutting groove vertically divides the end of the mounting arm and the mounting hole. The through hole is arranged on one side of the cutting groove, and the threaded hole is arranged on the other side of the cutting groove opposite to the through hole. The measuring rod of the measuring instrument is inserted into the mounting hole. A screw is arranged in the through hole and is in threaded fit with the threaded hole. Rotating the screw can close the mounting hole to clamp and fix the measuring rod.

[0011] Based on the above solution and as a preferred solution to the above solution: On the positioning table, two mutually parallel T-shaped grooves are horizontally arranged. An accommodating chamber is arranged above the T-shaped grooves, and a limiting card slot is arranged above the accommodating chamber. The upper side of the limiting card slot is a supporting plane; in one of the T-shaped grooves, a clamping block of the corresponding positioning clamp is arranged. The lower end of the clamping block is provided with a large end part that is in sliding fit with the T-shaped groove. The clamping block passes through the accommodating chamber and the limiting card slot and then extends above the supporting plane. The limiting card slot is in sliding contact with the side part of the clamping block; the driving device includes a lead screw rotatably arranged in the accommodating chamber. Threaded segments with opposite thread directions are arranged at both ends of the lead screw. Threaded nuts corresponding to the threaded segments with matching thread directions are arranged on the clamping block, and the threaded segments are in threaded fit with the threaded nuts.

[0012] Based on the above solution and as a preferred solution to the above solution: One end of the lead screw is provided with a handle for rotating the lead screw.

[0013] Based on the above solution and as a preferred solution to the above solution: The T-shaped grooves, the accommodating chamber and the limiting card slot horizontally penetrate the positioning table. A mounting plate is arranged on the side part of the positioning table with the accommodating chamber end. The end part of the lead screw is rotatably connected to the mounting plate.

[0014] Based on the above solution and as a preferred solution to the above solution: The positioning table can be horizontally slidably arranged on the base, and the sliding direction of the positioning table is parallel to the central axis of the moving path of the clamping block.

[0015] On the basis of the above solution and as a preferred solution of the above solution: A second slide rail is provided on the base, and a second chute slidably engaged with the second slide rail is provided on the positioning table.

[0016] On the basis of the above solution and as a preferred solution of the above solution: Positioning blocks are provided on the base, and the positioning blocks are arranged at both ends in the sliding direction of the positioning table for limiting the sliding range of the positioning table.

[0017] On the basis of the above solution and as a preferred solution of the above solution: The measuring gauge is a dial indicator or a micrometer.

[0018] To solve the problem of how to conveniently achieve repeated verification of the outer diameter of a workpiece, the present utility model has the following beneficial effects:

[0019] The outer diameter measuring instrument of the present utility model can be used for repeated verification of the outer diameter size of a workpiece.

[0020] During use, move the position of the table base on the column, record a standard position where a measuring gauge can detect the outer diameter size of the workpiece, record the reading of the measuring gauge when the table base is at this position and denote it as the reference reading. Then perform repeated detection operations on the workpiece. First, place the part of the workpiece to be detected on the supporting plane, use the driving device to control the clamping blocks of the positioning fixture to approach each other and clamp the side of the workpiece. After clamping in place, the central axis of the workpiece and the central axis of the moving path of the clamping blocks are in the same vertical plane. Then move the table base to the standard position. At this time, the lower end of the probe of the measuring gauge contacts the workpiece and obtains a reading. Compare the reading of the measuring gauge at this time with the reference reading. If the difference is within the designed error range, the outer diameter size of the workpiece at this place is qualified.

[0021] This method is very convenient to operate, especially beneficial for application scenarios that require repeated detection.

[0022] In addition to the purposes, features and advantages described above, the present utility model has other purposes, features and advantages. The following will refer to the drawings for a further detailed description of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the outer diameter measuring instrument of the present utility model;

[0024] Figure 2 It is an exploded assembly diagram of the positioning table part of the present utility model;

[0025] Figure 3 It is an exploded assembly diagram of the positioning clamp of the present utility model;

[0026] Figure 4 It is an exploded assembly diagram of the table base part of the present utility model;

[0027] Figure 5 This is Application Example 1 of the outer diameter measuring instrument of the present utility model;

[0028] Figure 6 This is Application Example 2 of the outer diameter measuring instrument of the present utility model. Specific Embodiment

[0029] Next, in conjunction with the accompanying drawings, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0030] Refer to Figure 1-6 , the outer diameter measuring instrument of the present utility model can be used for repeated verification of the size of the outer diameter of the workpiece 500.

[0031] As Figure 1 shown, this outer diameter measuring instrument includes a base 100, a positioning table 200, a dial seat 300, and a measuring dial 400. A vertically upward column 102 is provided on the base 100; the positioning table 200 is provided on the base 100. The positioning table 200 is provided with a horizontal support plane 202. Two positioning clamps 208 are also provided on the positioning table 200. Each positioning clamp 208 has two clamping blocks 209 slidably provided on the positioning table 200. The clamping blocks 209 extend vertically upward above the support plane 202. The two clamping blocks 209 are simultaneously connected to a driving device 213. As Figure 2 shown, the driving device 213 is used to synchronously drive the two clamping blocks 209 to move towards or away from each other. The two positioning clamps 208 are arranged in a line on the positioning table 200. The arrangement method is that the central axes of the moving paths of the clamping blocks 209 of the two positioning clamps 208 coincide in the horizontal direction; the dial seat 300 is slidably provided on the column 102 up and down; the measuring dial 400 is provided on the dial seat 300, and the probe 402 of the measuring dial 400 points vertically downward to the central axis of the moving path of the clamping block 209.

[0032] Among them, the measuring dial 400 is a general dial indicator or micrometer.

[0033] Usage Method 1, as Figure 5As shown in the figure, during use, move the position of the table base 300 on the column 102, record the standard position where a measuring gauge 400 can detect the outer diameter dimension of the workpiece 500, and record the reading of the measuring gauge 400 when the table base 300 is at this position as the reference reading. Then, repeat the detection operation on the workpiece 500. First, place the part of the workpiece 500 to be detected on the support plane 202, and use the driving device 213 to control the clamping blocks 209 of the positioning clamp 208 to move closer to each other to clamp the side of the workpiece 500. After clamping in place, the central axis of the workpiece 500 and the central axis of the moving path of the clamping blocks 209 are in the same vertical plane. Then, move the table base 300 to the standard position. At this time, the lower end of the probe 402 of the measuring gauge 400 contacts the workpiece 500 and obtains a reading. By comparing the reading of the measuring gauge 400 at this time with the reference reading, if the difference is within the design error range, the outer diameter dimension of this part of the workpiece 500 is qualified. This method is very convenient to operate, especially for application scenarios that require repeated detection.

[0034] For the second usage method, a scale mark 104 based on the height of the support plane 202 can be set on the column 102 as shown in Figure 1 the figure. For application scenarios with low measurement accuracy, the workpiece 500 can be placed on the support plane 202, and then the table base 300 is moved to measure the outer diameter of the workpiece 500.

[0035] To effectively support the up and down sliding of the table base 300, two high-precision first slide rails 103 are vertically arranged on two opposite sides of the column 102; the table base 300 includes a base body 301 and a mounting arm 304 provided on the base body 301. The middle part of the base body 301 is a hollow part 302, and two vertically arranged first chutes 303 are provided inside the hollow part 302; the column 102 is inserted into the hollow part 302, and the first chutes 303 are in sliding fit with the first slide rails 103, and the mounting arm 304 extends upward towards the positioning table 200.

[0036] Furthermore, in order to effectively mark the standard position for reference (the positioning position where the table base 300 moves repeatedly), a general slide rail limit block 105 can be set on the first slide rail 103 to position the position of the base body 301.

[0037] For the convenience of installing the measuring gauge 400, as shown in Figure 4As shown in the figure, one end of the mounting arm 304 away from the column 102 is provided with a mounting hole 305, a cutting groove 306, a through hole 307 and a threaded hole 308. The mounting hole 305 is vertically arranged. The cutting groove 306 vertically divides the end of the mounting arm 304 and the mounting hole 305. The through hole 307 is arranged on one side of the cutting groove 306, and the threaded hole 308 is arranged on the other side of the cutting groove 306 opposite to the through hole 307. The measuring rod 401 of the measuring gauge 400 is inserted into the mounting hole 305. A screw 309 is arranged in the through hole 307 and is in threaded cooperation with the threaded hole 308. Rotating the screw 309 can close the mounting hole 305 to clamp and fix the measuring rod 401.

[0038] As Figure 2 shown in the figure, for the design requirements of the sliding of the support clamp block 209 and the synchronous movement of the clamp block 209 in the same or opposite directions, two mutually parallel T-shaped grooves 203 are horizontally arranged on the positioning table 200. An accommodation chamber 204 is arranged above the T-shaped grooves 203, and a limit card slot 205 is arranged above the accommodation chamber 204. The upper side of the limit card slot 205 is a support plane 202. A clamp block 209 of a positioning clamp 208 is correspondingly arranged in one T-shaped groove 203. The lower end of the clamp block 209 is provided with a large end portion 210 that is slidably matched with the T-shaped groove 203. The clamp block 209 extends above the support plane 202 after passing through the accommodation chamber 204 and the limit card slot 205. The limit card slot 205 is in sliding contact with the side portion of the clamp block 209. As Figure 3 shown in the figure, the driving device 213 includes a lead screw 214 rotatably arranged in the accommodation chamber 204. Threaded segments 215 with opposite thread directions are respectively arranged at both ends of the lead screw 214. Threaded nuts 216 that are adapted to the thread directions of the threaded segments 215 are correspondingly arranged on the clamp blocks 209. The threaded segments 215 are in threaded cooperation with the threaded nuts 216.

[0039] Further, in order to conveniently and labor-savingly rotate the lead screw 214, a handle 217 for rotating the lead screw 214 is arranged at one end of the lead screw 214.

[0040] As Figure 2 shown in the figure, for the convenience of manufacturing and installation, the T-shaped grooves 203, the accommodation chamber 204 and the limit card slot 205 horizontally penetrate the positioning table 200. A mounting plate 206 is arranged on the side portion of the positioning table 200 with the end of the accommodation chamber 204. The end of the lead screw 214 is rotatably connected to the mounting plate 206. The end of the lead screw 214 penetrates through the mounting plate 206 and is in rotational cooperation with it. For example, a bearing is used to connect the mounting plate 206 and the lead screw 214.

[0041] Further, in order to solve the taper measurement of the tapered workpiece 500 (such as the tapered part of a tool), the positioning table 200 can be horizontally slidably arranged on the base 100. The sliding direction of the positioning table 200 is parallel to the central axis of the moving path of the clamp block 209.

[0042] The measurement of the taper can adopt Usage Mode 3.

[0043] Usage Mode 3 is as follows. Figure 6 As shown, place the workpiece 500 on the support plane 202, then use the positioning clamp 208 to position the side of the workpiece 500. Move the dial indicator base 300 to a position on the column 102 and read the reading of the measuring dial 400. Then move the positioning table 200. Move the dial indicator base 300 to the repeated position of the previous measurement for the second time, and read the reading of the measuring dial 400 again. The taper of the workpiece 500 can be calculated through the difference measured by the measuring dial 400 and the moving distance of the positioning table 200.

[0044] To improve the accuracy of taper measurement, the measuring dial 400 should preferably be selected with a large range as much as possible, and the moving distance of the positioning table 200 should be appropriately increased.

[0045] Scale marks 104 can also be set on its base 100 to read the moving distance of the positioning table 200.

[0046] Furthermore, to support the movement of the positioning table 200, a second slide rail 101 is provided on the base 100, and a second chute 201 that is slidably engaged with the second slide rail 101 is provided on the positioning table 200.

[0047] Furthermore, positioning blocks 207 are provided on the base 100. The positioning blocks 207 are arranged at both ends in the sliding direction of the positioning table 200 and are used to limit the sliding range of the positioning table 200. Using the positioning blocks 207 can accurately position the moving distance of the positioning table 200. One is conducive to repeated positioning, and the other is conducive to clarifying the moving distance and simplifying the reading of the moving distance of the positioning table 200.

[0048] Among them, the setting of the positioning blocks 207 can also refer to the method of setting the slide rail limit blocks 105 on the first slide rail 103 to set the slide rail limit blocks 105 on the second slide rail 101 as the positioning blocks 207. Among them, slide rail limit blocks 105 are also set on the first slide rail 103 to position the dial indicator base 300.

[0049] As described above, only the preferred specific embodiments of the present invention are given, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An instrument for measuring outer diameter, characterized in that: include: A base (100), wherein a vertically upward column (102) is provided on the base (100); A positioning platform (200) is arranged on the base (100), the positioning platform (200) is provided with a horizontal support plane (202), and two positioning clamps (208) are also provided on the positioning platform (200), each of the positioning clamps (208) has two clamping blocks (209) slidably arranged on the positioning platform (200), the clamping blocks (209) vertically extend upward to the support plane (202), the two clamping blocks (209) are simultaneously connected to a driving device (213), and the driving device (213) is used to synchronously drive the two clamping blocks (209) to move towards or in opposite directions, and the two positioning clamps (208) are arranged in a line on the positioning platform (200), and the arrangement method is that the central axes of the moving paths of the clamping blocks (209) of the two positioning clamps (208) overlap in the horizontal direction; A meter base (300), the meter base (300) being slidably disposed on the column (102) up and down; A measuring meter (400) is arranged on the meter base (300), and a probe (402) of the measuring meter (400) points vertically downward to the central axis of the moving path of the clamping block (209).

2. The outer diameter measuring instrument according to claim 1, characterized in that: The upright column (102) has first slide rails (103) vertically disposed on two opposite sides thereof; The watch base (300) comprises a base body (301) and a mounting arm (304) arranged on the base body (301); the middle part of the base body (301) is a hollow part (302), and two vertically arranged first sliding grooves (303) are arranged inside the hollow part (302); The column (102) is inserted into the hollow portion (302), the first slide groove (303) is slidably matched with the first slide rail (103), and the mounting arm (304) extends toward the top of the positioning platform (200).

3. The outer diameter measuring instrument according to claim 2, characterized in that: The mounting arm (304) is provided with a mounting hole (305), a groove (306), a through hole (307) and a threaded hole (308) at one end thereof away from the column (102); the mounting hole (305) is vertically arranged; the groove (306) vertically divides the end of the mounting arm (304) and the mounting hole (305); the through hole (307) is arranged on one side of the groove (306); the threaded hole (308) is arranged on the other side of the groove (306) opposite to the through hole (307); the meter rod (401) of the measuring meter (400) is inserted into the mounting hole (305); a screw (309) is provided in the through hole (307) and is threadably matched with the threaded hole (308); the screw (309) can be rotated to close the mounting hole (305) to clamp and fix the meter rod (401).

4. The outer diameter measuring instrument according to claim 1, characterized in that: Two mutually parallel T-shaped slots (203) are horizontally arranged on the positioning platform (200); a receiving chamber (204) is arranged above the T-shaped slot (203); a limiting slot (205) is arranged above the receiving chamber (204); and the upper side of the limiting slot (205) is a supporting plane (202); A clamping block (209) of the positioning clamp (208) is correspondingly arranged in one of the T-slots (203); a large end portion (210) is provided at the lower end of the clamping block (209) for slidingly matching with the T-slot (203); the clamping block (209) passes through the accommodating chamber (204) and the limiting slot (205) and then extends above the supporting plane (202); the limiting slot (205) is in sliding contact with the side of the clamping block (209); The driving device (213) comprises a screw rod (214) rotatably arranged in the accommodating chamber (204), and threaded sections (215) with opposite thread rotation directions are respectively arranged at both ends of the screw rod (214), and a nut (216) adapted to the thread rotation direction of the threaded section (215) is correspondingly arranged on the clamping block (209), and the threaded section (215) is threadably matched with the nut (216).

5. The outer diameter measuring instrument according to claim 4, characterized in that: A handle (217) for rotating the screw rod (214) is provided at one end of the screw rod (214).

6. The outer diameter measuring instrument according to claim 4, characterized in that: The T-shaped slot (203), the accommodating chamber (204) and the limiting slot (205) penetrate the positioning platform (200) transversely; a mounting plate (206) is provided on the side of the positioning platform (200) having the end of the accommodating chamber (204); and the end of the screw rod (214) is rotatably connected to the mounting plate (206).

7. The outer diameter measuring instrument according to claim 1, characterized in that: The positioning platform (200) is arranged on the base (100) in a horizontally slidable manner, and the sliding direction of the positioning platform (200) is parallel to the central axis of the moving path of the clamping block (209).

8. The outer diameter measuring instrument according to claim 7, characterized in that: The base (100) is provided with a second slide rail (101), and the positioning platform (200) is provided with a second slide groove (201) that slidably cooperates with the second slide rail (101).

9. The outer diameter measuring instrument according to claim 7, characterized in that: The base (100) is provided with positioning blocks (207), and the positioning blocks (207) are arranged at both ends of the sliding direction of the positioning platform (200) and are used to control the sliding range of the positioning platform (200).

10. The outer diameter measuring instrument according to claim 1, characterized in that: The measuring gauge (400) is a dial gauge or a micrometer.

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