CN205138399U - Screw hole and terminal surface straightness detection device that hangs down - Google Patents

Abstract

A device for detecting the perpendicularity between a threaded hole and an end face, comprising a threaded positioning rod (8) that is matched and connected with the threaded hole of a workpiece (9) to be measured; the two ends are respectively connected to the positioning rod (8) by thrust ball bearings (4) The connected rotating sleeve (7); the clamping sleeve (5) connected with the rotating sleeve (7); the probe facing the workpiece to be measured and the lever gauge (10) connected with the clamping sleeve (5); located at the The rotating sleeve (7) is away from the workpiece (9) to be measured, and the compression spring (3) is set on the threaded positioning rod (8); side, the limit block (2) connected with the threaded positioning rod (8); on the side of the limit block (2) away from the workpiece (9) to be measured, the compression nut (1) threaded with the threaded positioning rod (8) ). According to the technical solution provided by the utility model, the simulation of the positioning axis is real and reliable, the rotation of the device is flexible and free, and the perpendicularity error value can be quantitatively measured.

Description

A testing device for perpendicularity between threaded hole and end face

technical field

The utility model relates to a detection device, in particular to a detection device for detecting the perpendicularity between a threaded hole and an end face.

Background technique

In mechanical processing, due to the functional requirements and drawing requirements of the components, it is often required that the threaded hole and the end face of the component with the threaded hole have a certain vertical accuracy. As shown in Figure 1, the threaded hole has a verticality requirement relative to the A datum plane. The existing detection method is to directly screw in the stud corresponding to the screw hole, and then check the gap between the stud and the edge of the square with a square and a feeler gauge. There are two shortcomings in this type of simple inspection tool: first, due to the The gap between the threaded screw and the cylindrical internal thread screw is large, and the radial movement is also large. It is not appropriate to use the axis of the cylindrical external thread to simulate the axis of the threaded hole to be measured. The axis of the cylindrical external thread cannot simulate the ideal axis position. Systematic deflection errors will occur, which will easily lead to untrue measurement results; second, using this simple checking tool method can only qualitatively judge whether the verticality of the measured threaded hole to the end face is within the tolerance range. The method of using a ruler can only qualitatively judge whether it is qualified or not, but cannot quantitatively read the specific value, and cannot quantitatively measure the specific value of the verticality of the measured threaded hole, which is not conducive to guiding subsequent production work.

CN104534965A disclosed a device for detecting verticality of internal threads and its use method on April 22, 2015. The device includes screws, threaded sleeves, reference blocks and pads. The center of the threaded sleeve is provided with an internally threaded hole C2, and the outer wall of the screw is There is an external thread C1, and the screw is inserted into the threaded hole C2 through the external thread C1. The threaded sleeve is T-shaped and the outer wall is provided with an external thread A2 that matches the internal threaded hole A1 on the workpiece to be measured. The reference block is ring-shaped and sleeved. Connected to the outer wall of the threaded sleeve, the spacer is placed at the bottom of the threaded sleeve and there is a distance between the threaded sleeve and the threaded sleeve. The technical solution of this public document converts the verticality of the internal threaded hole and its end face into the parallelism of the end faces of the two parts of the threaded sleeve and the reference block, and then it can be obtained by measuring the maximum difference in the distance between the threaded sleeve and the reference block The verticality still has not solved the technical problem that the detection device can directly read, and the measurement error is relatively large.

Utility model content

In order to overcome the defects of the existing measurement technology, the technical problem solved by the utility model is to provide a detection device for the perpendicularity between the threaded hole and the end face with accurate positioning, convenient measurement, and the ability to read specific data.

In order to solve the above measurement technical problems, the utility model provides a threaded hole and end surface perpendicularity detection device, which includes a threaded positioning rod that is connected with the threaded hole of the workpiece to be measured; the two ends are respectively connected to the positioning rod through thrust ball bearings The rotating sleeve; the clamping sleeve connected with the rotating sleeve; the probe facing the workpiece to be measured and the lever gauge connected with the clamping sleeve; located on the side of the rotating sleeve away from the workpiece to be measured, set on the thread positioning A compression spring on the rod; a limit block located on the side of the compression spring away from the workpiece to be measured and connected to the threaded positioning rod; located on the side of the limit block away from the workpiece to be measured, and threaded with the threaded positioning rod Connected compression nut.

As a further improved technical solution, the utility model provides a detection device for the perpendicularity between the threaded hole and the end surface, the end of the positioning rod near the workpiece to be measured is provided with a tapered thread that is matched with the threaded hole of the workpiece to be measured.

As a further technical solution for improvement, the utility model provides a threaded hole and end surface verticality detection device, the connection between the inner hole of the thrust ball bearing and the threaded positioning rod is a tight fit connection; the two ends of the rotating sleeve are provided with In the concave inner groove, the connection between the outer cylindrical surface of the thrust ball bearing and the inner groove of the rotating sleeve is a tight fit connection.

As a further technical solution for improvement, in the detection device for the verticality between the threaded hole and the end surface provided by the utility model, the connection between the limiting block and the threaded positioning rod is a slidable connection.

The technical scheme provided by the utility model adopts the positioning of the threaded positioning rod matched with the threaded hole of the workpiece to be tested, and the simulation of the positioning axis is real and reliable; the rotating sleeve is connected with the threaded positioning rod through the thrust ball bearing, so that the device can rotate flexibly; There is a spring between the sleeve and the compression nut, and the transmission sleeve is always tightly attached to the shoulder of the threaded positioning rod through the thrust ball bearing, eliminating the movement gap; the verticality error value can be quantitatively measured by using the lever gauge reading.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the application, but do not constitute an improper limitation of the utility model. In the attached picture:

Figure 1 is a diagram of the verticality requirements of the threaded hole of the workpiece to be measured relative to the workpiece reference plane;

Fig. 2 is a schematic diagram of the front view of the device for detecting the perpendicularity between the threaded hole and the end face;

Fig. 3 is a structural schematic diagram of the rotating sleeve of the embodiment threaded hole and end surface perpendicularity detection device;

Fig. 4 is a structural schematic diagram of a thread positioning rod of the detection device for perpendicularity between the threaded hole and the end surface of the embodiment.

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

As shown in Figures 2 to 4, the detection device for the perpendicularity between the threaded hole and the end face includes a tapered thread positioning rod 8 that is connected to the threaded hole of the workpiece 9 to be measured, the tapered thread positioning rod 8 is a stepped shaft, and the tapered thread positioning rod 8 The 9 ends near the workpiece to be measured are provided with taper threads that are matched with the threaded holes, and the 9 ends away from the workpiece to be measured are provided with threads for the connection of the compression nut 1 described later, and the two ends of the rotating sleeve 7 are respectively provided with inner concave Groove 6, the outer cylindrical surfaces of the two thrust ball bearings 4 are tightly connected with the two inner grooves 6 of the rotating sleeve 7, the inner holes of the two thrust ball bearings 4 are tightly connected with the tapered thread positioning rod 8, and the clamping sleeve 5 is connected by the screw Connected to the outer cylindrical surface of the rotating sleeve 7, the lever gauge 10 is connected to the clamping sleeve 5 by screws, the probe of the lever gauge 10 faces the reference plane of the workpiece to be measured, and the compression spring 3 is located on the rotating sleeve 7 away from the workpiece to be measured 9 One side is set on the tapered thread positioning rod 8, the limit block 2 is slidably connected with the tapered thread positioning rod 8 on the side of the compression spring 3 away from the workpiece 9 to be measured, and the compression nut 1 is located on the limit block 2 away from the workpiece to be measured. One side of measuring workpiece 9 is threadedly connected with tapered thread positioning rod 8.

Due to the effect of the compression spring 3, the transmission sleeve 7 is always in close contact with the shaft shoulder surface of the tapered thread positioning rod 8 through the thrust ball bearing 4. When measuring, screw the tapered thread positioning rod 8 into the threaded hole to be measured of the workpiece 9 until it can no longer be screwed into the threaded hole, adjust the position of the clamping sleeve 5 on the rotating sleeve 7, and make the lever gauge 10 side head press On the datum plane of the workpiece to be tested, fix the clamping sleeve 5, turn the transmission sleeve 7 once, and the difference between the maximum value and the minimum value measured by the lever gauge 10 is the value of the verticality of the measured threaded hole to the end surface.

Apparently, the utility model is not limited to the above preferred embodiments, and can also be transformed and improved in various forms within the spirit of the claims of the utility model and the specifications, so as to solve the same technical problem and achieve the desired technical effect. Therefore no restatement. All the solutions that a person of ordinary skill in the art can directly or associate from the content disclosed in the utility model also belong to the protection scope of the utility model as long as they are within the spirit defined in the claims.

Claims (4)

1. A detection device for the perpendicularity between a threaded hole and an end face, characterized in that it includes a threaded positioning rod (8) that is connected to the threaded hole of the workpiece (9) to be tested; The rotating sleeve (7) connected with the positioning rod (8); the clamping sleeve (5) connected with the rotating sleeve (7); (10); the compression spring (3) on the side of the rotating sleeve (7) away from the workpiece (9) to be measured and set on the threaded positioning rod (8); the compression spring (3) away from the workpiece to be measured The limit block (2) connected to the threaded positioning rod (8) on the side of the workpiece (9) to be measured; located on the side of the limit block (2) away from the workpiece (9) to be measured, and positioned with the thread The rod (8) is threaded to the compression nut (1). 2. The device for detecting perpendicularity between threaded holes and end faces according to claim 1, characterized in that, the end of the positioning rod (8) near the workpiece (9) to be measured is provided with a The threaded hole mates with the tapered thread of the connection. 3. The device for detecting perpendicularity between threaded holes and end surfaces according to claim 1, characterized in that the connection between the inner hole of the thrust ball bearing (4) and the threaded positioning rod (8) is a tight fit connection; Both ends of the rotating sleeve (7) are provided with concave inner grooves (6), and the connection between the outer cylindrical surface of the thrust ball bearing (4) and the inner groove (6) of the rotating sleeve (7) is tight. Mate connection. 4. The device for detecting perpendicularity between threaded holes and end surfaces according to claim 1, characterized in that the connection between the limiting block (2) and the thread positioning rod (8) is a slidable connection.