A precision bore step gauge

Abstract

This invention relates to the field of stepped hole measurement technology, and in particular to a precision internal step gauge. It mainly includes a dial indicator, an internal step gauge body, a support nut, a support spring, a support screw, and an internal groove probe. This invention primarily utilizes a lever to convert linear movement into pointer rotation, and then uses a scale dial for reading the length measurement instrument. Compared to previous profilometers and three-dimensional coordinate measuring machines, this invention allows for online step measurement, offering convenience, flexibility, and high fabricationability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stepped hole height measurement, in particular to a precision hole step gauge. BACKGROUND

[0002] The three-coordinate detection method is to place the measured part into the three-coordinate measuring instrument, to place the measured object in the measuring space of the three-coordinate measuring machine, to obtain the coordinate positions of each measuring point on the measured object by using the contact or non-contact detection system, and to calculate the geometric size and shape, position to be measured according to the spatial coordinate values of these points by software mathematical operation. Therefore, the three-coordinate measuring machine has the characteristics of high precision, high efficiency and universality. The three-coordinate measuring machine is one of the most effective methods for measuring and obtaining size data. It can replace various surface measuring tools and expensive combination gauges, reduce the time required for complex measurement tasks from hours to minutes, and quickly and accurately evaluate size data to provide useful information about the production process for operators. The profilometer uses laser scanning technology, has high frequency and high precision, can accurately and quickly measure and test the profile, two-dimensional size and two-dimensional displacement of the object, and has strong environmental adaptability. As a precision measuring instrument, it is widely used in the railway industry. However, the above two methods are offline detection, and if an error occurs during the measurement of the hole step, a large amount of correction time is required to correct it, and the machining needs to be corrected again. Therefore, a small and portable precision inner step gauge is needed, which can accurately detect online, and if the detected size is unqualified, it can directly be machined again without correction. SUMMARY

[0003] The purpose of the present application is to manufacture a precision hole step gauge. Compared with the offline measurement of the step, the step gauge can measure the distance between the inner step and the hole end face at any time, find the error of the product, directly machine again without correction, and avoid wasting a lot of time in later correction.

[0004] In order to achieve the above purpose, the precision hole step gauge comprises a dial gauge, an inner step gauge body and an inner groove probe, the inner step gauge body is integrally formed with the dial gauge, characterized in that a dialing device is arranged on the top of the inner step gauge body, a slidable transmission head is arranged at the front end of the inner step gauge body, the head end of the slidable transmission head is in contact with the rear surface of the inner groove probe, the top of the inner groove probe is connected with the top of the dialing device through an elastic rope, and the dialing device is buckled down, so that the rear of the inner groove probe presses the slidable transmission head.

[0005] Further, the poking device is long hook-shaped, the left side is a short arm end, the right side is a long arm end, a first small hole is formed in the top of the short arm end of the poking device, a second small hole is formed in the top of the inner groove measuring head, the two ends of the elastic rope pass through the first small hole and the second small hole respectively, the elastic rope connects the inner groove measuring head and the poking device through the first small hole and the second small hole, and the poking device can pull the top of the inner groove measuring head upward.

[0006] Further, a support screw is connected to the inner groove measuring head, the support screw is embedded into the head end of the inner step gauge body, a support nut is fixed on the support screw, a support spring is connected between the support nut and the inner groove measuring head, and the inner groove measuring head is mechanically connected with the support screw bolt, preferably, pin bolt connection can be adopted, and the inner groove measuring head can rotate around the connecting point.

[0007] Further, the slidable transmission head penetrates the front end of the inner step gauge body, the tail end of the slidable transmission head is located inside the inner step gauge body, and the head end and the tail end of the slidable transmission head are round.

[0008] Further, the inner step gauge body is cylindrical, the inner step gauge body is provided with an auxiliary transmission rod and an auxiliary spring, the tail end of the slidable transmission head is in contact with the head end of the auxiliary transmission rod, the tail end of the auxiliary transmission rod is in contact with the head end of the auxiliary spring, the slidable transmission head is extruded, the slidable transmission head pushes the auxiliary transmission rod, the auxiliary transmission rod compresses the auxiliary spring to generate deformation, and the dial indicator pointer displays the reading.

[0009] Further, the front end of the inner step gauge body is a round hole extending end, the longest side of the round hole extending end is slightly larger than the inner diameter of the measured round hole, and the application can be erected outside the product during use.

[0010] The application has the following advantages: the precise inner step gauge is small, light, low in value, strong in manufacturing, simple and convenient to operate, and can detect the height size of the hole inner step of the product in real time. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structure schematic view of a specific embodiment of the application.

[0012] Figure 2 It is a structure front view of a specific embodiment of the application.

[0013] Figure 3 It is a structure side view of a specific embodiment of the application.

[0014] Figure 4 It is a schematic view of a measured product of the application.

[0015] The numbers in the figure: 1-internal step gauge body, 2-assistant spring, 3-assistant transmission rod, 4-slidable transmission head, 5-internal groove measuring head, 6-bracket screw, 7-bracket spring, 8-bracket nut, 9-micrometer, 10-dial device, 11-elastic rope, 12-round hole extension end. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0017] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0018] As Figures 1-2The application discloses a precise hole inner step difference gauge, which mainly comprises a micrometer 9, an inner step gauge body 1 and an inner groove measuring head 5, the micrometer 9 and the inner step gauge body 1 are integrally formed, the inner groove measuring head 5 is connected with the head end of the inner step gauge body 1 through a support screw 6, a support nut 8 is used for fixing the support screw 6, a connecting point of the inner groove measuring head 5 and the support screw 6 is a fulcrum, the inner groove measuring head 5 can rotate around the fulcrum, a poking device 10 is arranged on the upper portion of the outer portion of the inner step gauge body 1, the poking device 10 is in the shape of a long hook, the left side is a short arm end, the right side is a long arm end, a first small hole is arranged at the top of the short arm end, the poking device 10 can rotate around the bending point of the poking device, a second small hole is arranged on the inner groove measuring head 5, and the two ends of an elastic rope 11 pass through the first small hole and the second small hole, so that a mechanical connection relationship is established between the poking device 10 and the inner groove measuring head 5, the poking device 10 can pull the movement of the inner groove measuring head 5, a slidable transmission head 4 is arranged at the head end of the inner step gauge body 1, the slidable transmission head 4 passes through the head end of the inner step gauge body 1, the two ends of the transmission head are in the shape of a round head, the inner step gauge body 1 is in the shape of a cylinder, an auxiliary transmission rod 3 and an auxiliary spring 2 are arranged in the inner step gauge body 1, the slidable transmission head 4, the auxiliary transmission rod 3 and the auxiliary spring 2 are sequentially contacted from left to right, the long arm end of the poking device 10 is buckled down, the short arm end is rotated clockwise with the bending point as the fulcrum, the top of the short arm end is upturned, the elastic rope 11 pulls the inner groove measuring head 5 to be pressed, the slidable transmission head 4 bearing pressure will push the auxiliary transmission rod 3 forward, the auxiliary transmission rod 3 will also push the auxiliary spring 2 forward, the auxiliary spring 2 is deformed, and the micrometer 9 displays a reading.

[0019] The use method of the application is as follows: holding the inner step gauge body 1, the head of the inner step gauge body 1 is inserted into the hole of a product to be measured, since the maximum side length of the round hole insertion end 12 is greater than the outer hole diameter of the product to be measured, the structure behind the round hole insertion end 12 is clamped on the outer hole of the product to be measured, the inner groove measuring head 5 is inserted into the step hole, the poking device 10 is buckled down, the inner groove measuring head 5 is upturned, when the upper portion and the lower portion of the inner groove measuring head 5 are in contact with the inner wall of the step hole, the poking device 10 is stopped from being pressed down at this moment, the reading of the micrometer 9 is checked, the reading displayed by the micrometer 9 is the height of the step hole, and the application mainly converts the linear displacement of the slidable transmission head 4, the auxiliary transmission rod 3 and the auxiliary spring 2 into the rotary motion of the micrometer 9.

Claims

1. A precision bore step gauge, comprising a dial gauge (9), an inner step gauge body (1) and an inner groove measuring head (5), the inner step gauge body (1) being integrally formed with the dial gauge (9), characterized in that, The inner step gauge body (1) is provided with a poking device (10) on the top, the front end of the inner step gauge body (1) is provided with a slidable transmission head (4), the head end of the slidable transmission head (4) is in contact with the rear surface of the inner groove measuring head (5), the top of the inner groove measuring head (5) is connected with the top of the poking device (10) through an elastic rope (11), and the inner groove measuring head (5) is pressed against the slidable transmission head (4) when the poking device (10) is buckled. The poking device (10) is long hook-shaped, the left side is a short arm end, the right side is a long arm end, the top of the short arm end of the poking device (10) is provided with a first small hole, and the top of the inner groove measuring head (5) is provided with a second small hole, and the elastic rope (11) passes through the first small hole and the second small hole at the two ends. The inner groove measuring head (5) is connected with a support screw (6), the support screw (6) is embedded into the head end of the inner step gauge body (1), a support nut (8) is fixed on the support screw (6), and a support spring (7) is connected between the support nut (8) and the inner groove measuring head (5). The use method is that the inner step gauge body (1) is held, the head of the inner step gauge body (1) is inserted into the hole of the measured product, the inner groove measuring head (5) enters the step hole, the poking device (10) is buckled, the inner groove measuring head (5) is raised, when the upper part and the lower part of the inner groove measuring head (5) are in contact with the inner wall of the step hole, the poking device (10) is stopped from being pressed, the reading of the dial gauge (9) is checked, and the reading displayed by the dial gauge (9) is the height of the step hole.

2. The precision bore step gauge of claim 1, wherein, The slidable transmission head (4) penetrates the front end of the inner step gauge body (1), and the tail end of the slidable transmission head (4) is located in the inner step gauge body (1).

3. The precision bore step gauge of claim 1, wherein, The inner step gauge body (1) is cylindrical, the inner step gauge body (1) is provided with an auxiliary transmission rod (3) and an auxiliary spring (2), the tail end of the slidable transmission head (4) is in contact with the head end of the auxiliary transmission rod (3), the tail end of the auxiliary transmission rod (3) is in contact with the head end of the auxiliary spring (2), the slidable transmission head (4) is pressed, the slidable transmission head (4) drives the auxiliary transmission rod (3), and the auxiliary transmission rod (3) compresses the auxiliary spring (2) to generate deformation.

4. The precision bore step gauge of claim 1, wherein, The front end of the inner step gauge body (1) is a round hole insertion end (12), and the longest side of the round hole insertion end (12) is greater than the inner diameter of the measured round hole.

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