CN203837627U - Inner hole groove measuring device - Google Patents

Abstract

The utility model discloses an inner hole groove measuring device, which comprises a sleeve body, a differential cylinder, a central shaft and at least two measuring rods, at least two measuring rods are slidably and evenly distributed on the radial peripheral wall of the sleeve body Above, the microtube is installed on the sleeve body, and the central shaft is axially movably supported on the sleeve body, and the central shaft is connected with the microtube so that when the microtube is rotated, the central shaft moves axially relative to the sleeve body, The central shaft has a measuring rod driving body, and the tail ends of at least two measuring rods are movably connected with the measuring rod driving body, and when the micrometer cylinder is rotated, the radial moving distance of the measuring rod relative to the sleeve body is equal to that of the central axis Relative to the axial movement distance of the sleeve body, a return spring is arranged between the tail end of the measuring rod and the driving body of the measuring rod. The utility model can accurately measure the diameter of the groove in the inner hole of the part, and avoids the phenomenon of conflict between machine tool operators and inspectors.

Description

Inner hole groove measuring device

technical field

The utility model relates to an inner hole groove measuring device.

Background technique

At present, in mechanical processing, the diameter of the inner groove of some parts cannot be measured, and the machine tool operator can only roughly determine the diameter of the groove by controlling the dial according to the drawing, which often causes conflicts between the machine tool operator and the inspector.

Contents of the invention

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a device for measuring the inner hole groove, which can accurately measure the diameter of the inner hole groove of the part, and avoid the conflict between the machine tool operator and the inspector. contradictory phenomenon.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is: a device for measuring inner hole grooves, which includes a sleeve body, a differential cylinder, a central shaft and at least two measuring rods, at least two measuring rods are slidably balanced Distributed on the radial peripheral wall of the sleeve body, the microtube is installed on the sleeve body, and the central shaft is supported on the sleeve body in an axially movable manner, and the central shaft is connected with the microtube so that when the microtube is rotated, the central axis Relative to the axial movement of the sleeve body, the central shaft has a measuring rod driving body, and the tail ends of at least two measuring rods are movably connected with the measuring rod driving body, and when the differential cylinder is rotated, the measuring rod is relatively The radial moving distance of the body is equal to the axial moving distance of the central shaft relative to the sleeve body, and a return spring is arranged between the tail end of the measuring rod and the driving body of the measuring rod.

Further, in order to prevent the driving body of the measuring rod from exceeding the limited stroke, a stop pin is installed on the sleeve body, and the stop pin cooperates with the driving body of the measuring rod.

A structure is further provided so that when the differential cylinder is rotated, the radial moving distance of the measuring rod relative to the sleeve body is equal to the axial moving distance of the central axis relative to the sleeve body, and the measuring rod driving body is a cone structure , the cone slope angle of the pyramid structure is α, and tanα=0.5.

Further, there are three measuring rods.

After adopting the above-mentioned technical scheme, when measuring the diameter of the groove of the inner hole, rotate the micrometer cylinder, extend the head of the measuring rod into the groove of the inner hole, and move the central axis 1mm in each axial direction, and the measuring rod is in the sleeve body. In the radial direction, that is, the distance extending into the groove of the inner hole is also moved by 1mm, so as long as a standard inner hole is used to correct the diameter measured by the measuring rod at a certain position of the measuring device, the measured inner hole groove can be calculated The diameter of the groove.

Description of drawings

Fig. 1 is a structural schematic diagram of the inner hole groove measuring device of the present invention.

Detailed ways

In order to make the content of the utility model more clearly understood, the utility model will be further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

As shown in Fig. 1, a kind of inner hole groove measurement device, it comprises sleeve body 6, microtube 7, central shaft 5 and at least two measuring rods 3, at least two measuring rods 3 are slidably distributed on the casing On the radial peripheral wall of the cylinder body 6, the microtube 7 is installed on the sleeve body 6, and the central shaft 5 is supported on the sleeve body 6 in an axially movable manner, and the central shaft 5 is connected with the microtube 7 so that when the microtube 7 is rotated The central shaft 5 moves axially relative to the sleeve body 6, the central shaft 5 has a measuring rod driving body 5-1, and the tail ends of at least two measuring rods 3 are movably connected with the measuring rod driving body 5-1, and when the rotation differential 7, the radial movement distance of the measuring rod 3 relative to the sleeve body 6 is equal to the axial movement distance of the central axis 5 relative to the sleeve body 6, and the distance between the tail end of the measuring rod 3 and the measuring rod driving body 5-1 A return spring 4 is provided.

In order to prevent the measuring rod driving body 5-1 from exceeding the limited stroke, as shown in FIG. 1 , a stop pin 8 is installed on the sleeve body 6, and the stop pin 8 cooperates with the measuring rod driving body 5-1.

The measuring rod driving body 5-1 is a cone structure, and the cone inclination angle of the cone structure is α, and tanα=0.5, and α is about 26°34′. With this structure, when the differential cylinder 7 is rotated, the measuring rod The radial movement distance of 3 relative to the sleeve body 6 is equal to the axial movement distance of the central shaft 5 relative to the sleeve body 6.

As shown in Fig. 1, there are three measuring rods 3, but not limited thereto.

The working principle of the utility model is as follows:

When measuring the diameter of the inner hole groove 2-1 of the workpiece 2, rotate the micrometer cylinder 7, extend the head of the measuring rod 3 into the inner hole groove 2-1, and the central axis 5 moves 1mm in each axial direction, and the measuring rod 3 In the radial direction of the sleeve body 6, that is, the distance extending into the groove 2-1 of the inner hole also moves 1 mm, so as long as a standard inner hole is used to correct the measured value of the measuring rod 3 at a certain position of the measuring device diameter, the diameter of the measured inner hole groove 2-1 can be calculated.

The specific embodiments described above have further described the technical problems, technical solutions and beneficial effects solved by the utility model in detail. It should be understood that the above descriptions are only specific embodiments of the utility model and are not intended to be used To limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (4)

1. an inner hole groove measurement mechanism, it is characterized in that: it comprises sleeve body (6), microdrum (7), central shaft (5) and at least two sounding rods (3), at least two sounding rods (3) are distributed on the radially perisporium of sleeve body (6) slidably, microdrum (7) is arranged on sleeve body (6), central shaft (5) can axially movably be bearing on sleeve body (6), when described central shaft (5) is connected with microdrum (7) to rotates microdrum (7), central shaft (5) moves axially with respect to sleeve body (6), described central shaft (5) has sounding rod driving body (5-1), the tail end of at least two sounding rods (3) is all flexibly connected with sounding rod driving body (5-1), and in the time of rotation microdrum (7), sounding rod (3) equals the move axially distance of central shaft (5) with respect to sleeve body (6) with respect to the distance that moves radially of sleeve body (6), between the tail end of sounding rod (3) and sounding rod driving body (5-1), be provided with retracing spring (4).

2. inner hole groove measurement mechanism according to claim 1, is characterized in that: on described sleeve body (6), backing pin (8) is installed, and this backing pin (8) matches with sounding rod driving body (5-1).

3. inner hole groove measurement mechanism according to claim 1 and 2, is characterized in that: described sounding rod driving body (5-1) is cone structure, and the cone bevel angle of this cone structure is α, and tan α=0.5.

4. inner hole groove measurement mechanism according to claim 1, is characterized in that: described sounding rod (3) is three.