Step excircle diameter measuring device

Abstract

The utility model discloses a step excircle diameter measuring device, which comprises a measuring main body, the overlook direction of the measuring main body is of a C-shaped structure, a measuring space is formed at the notch of the C-shaped structure, one end of the measuring main body is provided with a mounting hole penetrating along the horizontal direction, a dial indicator is inserted into one side of the mounting hole, and the dial indicator is arranged on the other side of the measuring main body. A measuring head mounting block is arranged on the other side of the mounting hole, a movable measuring head is arranged on the measuring head mounting block in a penetrating manner, one end of the movable measuring head is in contact with a measuring head of the dial indicator, the part, inserted into the measuring head mounting block, of the movable measuring head is a stepped shaft, and a spring is sleeved outside the stepped shaft; the end portion, penetrating out of the measuring head installation block, of the movable measuring head is sleeved with a check ring, two fixed measuring heads are evenly distributed on the other portion of the C-shaped structure, the defects in the prior art are overcome, and the step outer circle diameter measuring device is high in measuring accuracy and measuring efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring devices, in particular to a step outer circle diameter measuring device. Background Art

[0002] In mechanical processing, how to measure the outer diameter of the step is a very common problem encountered in many factories. When measuring with a micrometer, the measuring claw cannot measure; when the outer diameter accuracy requirement is high, it is obviously not appropriate to measure with an ordinary vernier caliper; therefore, it is impossible to measure with conventional general measuring tools, and special calipers are usually used for qualitative measurement in production. However, the same nominal size has different process sizes. If calipers are used for detection, calipers of different sizes are required, so there are many varieties of calipers; because calipers are used to measure parts, there is no specific size display, so there is a large change in the process allowance between semi-finishing and finishing, which affects product quality; calipers are frequently used in mass production and wear quickly (superfinishing wears one piece every 2 to 5 days). In order to avoid out-of-tolerance parts, calipers must be frequently tested, which requires a complex management procedure. At the same time, the standards for the use of calipers are different, and disputes often occur between operators and inspectors when judging whether the workpiece is qualified. Utility Model Content

[0003] The utility model aims to provide a step outer diameter measuring device, solve the above-mentioned deficiencies in the prior art, and provide a step outer diameter measuring device with high measurement accuracy and high measurement efficiency.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A step outer circle diameter measuring device comprises: a measuring body, which is in a C-shaped structure when viewed from above, a measuring space is formed at the notch of the C-shaped structure, one end of the measuring body has a mounting hole that runs horizontally through, a micrometer is inserted into one side of the mounting hole, and the other side of the mounting hole has a probe mounting block, a movable probe is passed through the probe mounting block, one end of the movable probe contacts with the probe of the micrometer, the part of the movable probe inserted into the probe mounting block is a stepped shaft, a spring is sheathed on the stepped shaft, the end of the movable probe that passes through the probe mounting block is sheathed on a retaining ring, and the rest of the C-shaped structure has two fixed probes evenly distributed.

[0006] The utility model provides a step outer diameter measuring device, wherein the probe mounting block and the bottom surfaces of two fixed probes are located in the same plane.

[0007] The utility model discloses a step outer diameter measuring device. The connection between the measuring body, the measuring head mounting block and the two fixed measuring heads is provided with a positioning sink.

[0008] The utility model discloses a step outer diameter measuring device. The measuring body is connected with a measuring head mounting block and two fixed measuring heads through bolts.

[0009] The utility model provides a step outer diameter measuring device. An anti-rotation pin is provided on one side of the movable probe. The anti-rotation pin is connected to a probe mounting block.

[0010] The utility model discloses a step outer diameter measuring device. The upper and lower surfaces of the measuring body are provided with a plurality of weight-reducing grooves.

[0011] The beneficial effects of the utility model are as follows: a step outer diameter measuring device is proposed, which measures the workpiece diameter by the principle of comparative measurement, thereby reducing the cumulative error; the transmission part of the movable probe and the measuring mounting block adopts a hole-shaft micro-clearance match to ensure the accuracy of the transmission precision; the measuring stroke is controlled by a spring and a retaining ring, the measuring stroke is large, and the measuring force is constant without damaging the workpiece. When in use, it is only necessary to use a calibration piece to zero the micrometer of the measuring device; then measure the workpiece, convert the micrometer indication and the actual measured value of the calibration piece, and the actual value of the step outer diameter of the measured workpiece can be obtained, the measurement efficiency is high, the accuracy of the measurement result is greatly improved, and the requirements for the operator's measurement skill level are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0013] Figure 1 It is a schematic diagram of an embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram of measuring a standard part in an embodiment of the utility model;

[0015] Figure 3 It is a cross-sectional view of a standard part of an embodiment of the utility model;

[0016] Figure 4 It is an axonometric diagram of an embodiment of the utility model;

[0017] Figure 5 It is a measurement axonometric drawing of a standard part of an embodiment of the utility model;

[0018] Figure 6 It is a schematic diagram of measuring a workpiece to be measured according to an embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] like Figure 1-6 As shown, a step outer diameter measuring device comprises: a measuring body 1, the measuring body 1 is in a C-shaped structure when viewed from above, a measuring space 10 is formed at the notch of the C-shaped structure, one end of the measuring body 1 has a mounting hole 2 that runs horizontally through, a micrometer 3 is inserted into one side of the mounting hole 2, and a probe mounting block 4 is provided on the other side of the mounting hole 2, a movable probe 5 is penetrated on the probe mounting block 4, one end of the movable probe 5 contacts the probe of the micrometer 3, and the movable probe 5 is inserted into the probe mounting block 4. The block 4 is a stepped shaft, and a spring 6 is sheathed on the stepped shaft. The end of the movable probe 5 that passes through the probe mounting block 4 is sheathed on the retaining ring 7. The rest of the C-shaped structure is evenly distributed with two fixed probes 9. A standard part 12 or a workpiece 14 to be measured can be placed in the measuring space 10. The movable probe 5 and the positioning hole on the probe mounting block 4 are matched through a micro-clearance between the hole and the shaft, and the movement clearance is small, thereby ensuring the accuracy of the transmission accuracy of the movable probe. The spring 6 can ensure the accurate resetting of the movable probe 5.

[0021] As a preferred embodiment, the probe mounting block 4 and the bottom surfaces of the two fixed probes 9 are in the same plane. In this way, during calibration or measurement, the measuring device can be placed on the large end surface on the lower side of the outer circle of the step to form a supporting surface, thereby ensuring that the measuring surface of the movable probe 5 is in parallel contact with the outer circle of the step during measurement, thereby improving the accuracy of measurement.

[0022] As a preferred embodiment, the connection between the measuring body 1 and the probe mounting block 4 and the two fixed probes 9 is provided with a positioning sink, which can improve the installation accuracy.

[0023] As a preferred embodiment, the measuring body 1 is connected to the probe mounting block 4 and the two fixed probes 9 by bolts.

[0024] As a preferred embodiment, an anti-rotation pin 11 is provided on one side of the movable probe 5 , and the anti-rotation pin 11 is connected to the probe mounting block 4 to prevent the movable probe 5 from deflecting during linear motion.

[0025] As a preferred embodiment, the upper and lower surfaces of the measuring body 1 have a plurality of weight-reducing grooves 13 .

[0026] Brief description of the operating principle: According to the principle of comparative measurement, the calibration piece 12 is made according to the diameter of the workpiece 13 to be measured, and to measure the actual measured value, it is only necessary to use the calibration piece 12 to set the micrometer 3 of the measuring device to zero; then measure the workpiece 14 to be measured, convert the indication of the micrometer 3 and the actual measured value of the calibration piece 12, and the actual value of the outer circle diameter of the step of the workpiece 14 to be measured can be obtained. The measurement efficiency is high, the accuracy of the measurement result is greatly improved, and the requirement on the operator's measurement skill level is reduced.

[0027] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0029] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A step outer diameter measuring device, characterized in that: include: A measuring body (1) is provided, wherein the measuring body (1) is in a C-shaped structure when viewed from above, a measuring space (10) is formed at a notch of the C-shaped structure, one end of the measuring body (1) is provided with a mounting hole (2) extending horizontally therethrough, a micrometer (3) is inserted into one side of the mounting hole (2), the other side of the mounting hole (2) is provided with a probe mounting block (4), a movable probe (5) is provided on the probe mounting block (4), one end of the movable probe (5) contacts the probe of the micrometer (3), a portion of the movable probe (5) inserted into the probe mounting block (4) is a stepped shaft, a spring (6) is sheathed on the stepped shaft, an end of the movable probe (5) extending out of the probe mounting block (4) is sheathed with a retaining ring (7), and two fixed probes (9) are evenly distributed on the rest of the C-shaped structure.

2. A step outer diameter measuring device according to claim 1, characterized in that: The probe mounting block (4) and the bottom surfaces of the two fixed probes (9) are located in the same plane.

3. A step outer diameter measuring device according to claim 2, characterized in that: A positioning sink is provided at the connection between the measuring body (1), the measuring head mounting block (4) and the two fixed measuring heads (9).

4. A step outer diameter measuring device according to claim 3, characterized in that: The measuring body (1) is connected to the probe mounting block (4) and the two fixed probes (9) via bolts.

5. The step outer diameter measuring device according to claim 1, characterized in that: An anti-rotation pin (11) is provided on one side of the movable probe (5), and the anti-rotation pin (11) is connected to the probe mounting block (4).

6. The step outer diameter measuring device according to claim 1, characterized in that: The upper and lower surfaces of the measuring body (1) are provided with a plurality of weight-reducing grooves (13).

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