A detection device for detecting the bottom diameter of a taper

Abstract

This utility model discloses a testing device for detecting the bottom diameter of a taper, comprising: a handle with a through mounting hole; a measuring column passing through the mounting hole of the handle with at least a portion of its upper end outside the handle, the upper end of which has a measuring head that is conical and matches the tapered hole on the workpiece; an elastic element installed in the mounting hole that ensures the measuring column always tends to move upward; a limiting ring installed on the handle that prevents the measuring column from dislodging from the upper end of the handle; and a dial indicator that measures the change in the insertion depth of the measuring head in a standard part and the product to be tested, allowing the calculation of the bottom inner diameter of the product to be tested based on the change value, making the measurement quick and convenient.

Description

Technical Field

[0001] This utility model belongs to the field of machining inspection, and specifically relates to a testing device for detecting the bottom diameter of a taper. Background Technology

[0002] The product's electric chuck is formed by twisting sheet metal material to create a conical ring with an adjustable degree of closure. The taper of the conical part needs to meet the design requirements. Therefore, the taper of the electric chuck needs to be tested during the production process. Unqualified products need to be adjusted. How to measure the taper of the electric chuck is an urgent problem to be solved. Summary of the Invention

[0003] The purpose of this invention is to provide a convenient device for detecting the bottom diameter of a taper.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a detection device for detecting the bottom diameter of a taper, comprising:

[0005] The handle has a through mounting hole running vertically inside.

[0006] A measuring column, which passes through the mounting hole of the handle and has at least a portion of its upper end outside the handle, has a measuring head at its upper end, the measuring head being conical in shape to match the conical hole on the workpiece;

[0007] An elastic element, which is installed in the mounting hole and causes the measuring column to always have an upward tendency;

[0008] A limiting retaining ring is installed on the handle and prevents the measuring column from dislodging from the upper end of the handle;

[0009] A dial indicator is mounted on the handle with its probe positioned on the downward path of the measuring column. When the measuring column is vertically positioned and in a free state, the probe is in contact with the lower end face of the measuring column and is not subjected to pressure from the measuring column.

[0010] Another implementation method is that a connecting ring is formed at the upper end of the handle, and the outer circumferential surface of the connecting ring is threaded, and the connecting ring is threadedly connected to the limiting retaining ring.

[0011] Another implementation method is to form a lower boss on the inner sidewall of the connecting ring, which is located on the path of the measuring head as it moves downward, and serves as the lower limit of the measuring head.

[0012] Another implementation method is to form an annular upper boss on the inner sidewall of the upper end of the limiting ring. The inner diameter of the upper boss is smaller than the outer diameter of the lower end of the measuring head, and the upper boss serves as the upper limit of the measuring head.

[0013] Another implementation method includes a linear bearing fixedly installed in the handle, and the measuring column includes a movable column connected to the lower part of the measuring head. The movable column passes through the linear bearing. When the measuring column is vertically set and in a free state, the detection rod is attached to the lower end surface of the movable column and is not subjected to pressure from the movable column.

[0014] Another implementation method is to sleeve the elastic element on the movable column, with the lower end of the elastic element fixed inside the handle and its upper end abutting against the lower end face of the measuring head. The elastic element can be a spring that is kept in a compressed state, so that the measuring column always has an upward tendency.

[0015] Another implementation method includes an adapter fixed to the lower end of the handle, with the dial indicator's probe fixedly inserted into the adapter; the adapter's insertion hole is interference-fitted with the dial indicator's probe to achieve quick fixing of the dial indicator.

[0016] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: by measuring the change value of the insertion depth of the measuring head in the standard part and the product to be tested by a dial indicator, the bottom inner diameter of the product to be tested can be calculated based on the change value, and the measurement is quick and convenient. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 for Figure 1 A sectional view;

[0019] Figure 3 This is a schematic diagram showing the connection between the product and the measuring head during measurement. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0021] See Figure 1-3As shown, the measuring device for detecting the taper bottom diameter includes: a handle 2, a measuring column 1, an elastic element 3, a limiting ring 5, a linear bearing 4, an adapter 7, and a dial indicator 6. The handle 2 has a through mounting hole running vertically through it. The measuring column 1 passes through the mounting hole in the handle 2, with at least a portion of its upper end outside the handle 2. Its upper end has a measuring head 11, which is tapered and matches the tapered hole on the workpiece. The elastic element 3 is installed in the mounting hole, ensuring the measuring column 1 always tends to move upwards. The limiting ring 5 is installed on the handle 2, preventing the measuring column 1 from dislodging from the upper end of the handle 2. The dial indicator 6 is installed on the handle 2, with its measuring rod 61 positioned along the downward movement path of the measuring column 1. The linear bearing 4 is fixedly installed inside the handle 2. The adapter 7 is fixed to the lower end of the handle 2.

[0022] Specifically:

[0023] A connecting ring 22 is formed at the upper end of the handle 2. The outer circumferential surface of the connecting ring 22 is threaded, and the connecting ring 22 is threaded into the limiting retaining ring 5. A lower boss 21 is formed on the inner side wall of the connecting ring 22. The lower boss 21 is located on the path of the measuring head 11 moving downward, and the lower boss 21 serves as the lower limit of the measuring head 11.

[0024] The upper end of the limiting ring 5 forms an annular upper boss 51 on its inner side wall. The inner diameter of the upper boss 51 is smaller than the outer diameter of the lower end of the measuring head 11. The upper boss 51 serves as the upper limit of the measuring head 11.

[0025] The measuring column 1 includes a movable column 12 connected below the measuring head 11. The movable column 12 passes through the linear bearing 4. When the measuring column 1 is set vertically and is in a free state, the detection rod 61 is attached to the lower end surface of the movable column 12 and is not subjected to the pressure of the movable column 12.

[0026] The elastic element 3 is sleeved on the moving column 12. The lower end of the elastic element 3 is fixed inside the handle 2, and its upper end abuts against the lower end face of the measuring head 11. The elastic element 3 can be a spring, which is kept in a compressed state, so that the measuring column 1 always has an upward tendency.

[0027] The measuring rod 61 of the dial indicator 6 is fixedly inserted into the adapter 7; the insertion hole of the adapter 7 is interference-fitted with the measuring rod 61 of the dial indicator 6 to achieve quick fixation of the dial indicator 6.

[0028] The measurement method is as follows: Place product 0 onto measuring head 11, hold handle 2 with your left hand, and press product 0 vertically downwards with your right hand. At this time, measuring column 1 presses down on elastic element 3, maintaining straightness through linear bearing 4. When product 0 is pressed to the limit stop ring 5, moving column 12 contacts Mitutoyo dial indicator probe 6. Mitutoyo dial indicator 6 maintains straightness through adapter 7. Then, using a certain function calculation formula, read the dial indicator value and remove the product. The change in the insertion depth of the measuring head in the standard part and the product to be tested is measured by the dial indicator. The bottom inner diameter of the product to be tested can be calculated based on the change value. The measurement is quick and convenient. It can also be connected to automated assembly equipment to realize the function of rapid detection; the measurement results can be displayed in real time and are equipped with a data output port. Data can be stored to realize statistical process control, which can not only meet the target requirements, but also save more costs.

[0029] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A detection device for detecting the bottom diameter of a taper, characterized in that it include: The handle has a through mounting hole running vertically inside. A measuring column, which passes through the mounting hole of the handle and has at least a portion of its upper end outside the handle, has a measuring head at its upper end, the measuring head being conical in shape to match the conical hole on the workpiece; An elastic element, which is installed in the mounting hole and causes the measuring column to always have an upward tendency; A limiting retaining ring is installed on the handle and prevents the measuring column from dislodging from the upper end of the handle; A dial indicator, which is mounted on the handle and whose probe is located on the path of the downward movement of the measuring column.

2. The detection device for detecting the taper base diameter according to claim 1, characterized in that: The upper end of the handle has a connecting ring, the outer circumferential surface of the connecting ring is threaded, and the connecting ring is threaded into the limiting retaining ring.

3. The detection device for detecting the taper base diameter according to claim 2, characterized in that: A lower boss is formed on the inner sidewall of the connecting ring, and the lower boss is on the path of the measuring head moving downward.

4. The detection device for detecting the taper base diameter according to claim 1, characterized in that: The inner wall of the upper end of the limiting ring forms an annular upper boss, and the inner diameter of the upper boss is smaller than the outer diameter of the lower end of the measuring head.

5. The detection device for detecting the taper base diameter according to claim 1, characterized in that: The device further includes a linear bearing fixedly installed in the handle, and the measuring column includes a movable column connected below the measuring head, the movable column passing through the linear bearing.

6. The detection device for detecting the taper base diameter according to claim 5, characterized in that: The elastic element is sleeved on the movable column, the lower end of the elastic element is fixed inside the handle, and its upper end abuts against the lower end surface of the measuring head.

7. The detection device for detecting the taper base diameter according to claim 5, characterized in that: The device also includes an adapter fixed to the lower end of the handle, and the dial indicator's probe is fixedly inserted into the adapter.

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