Coaxiality and flatness detection device for bell jar

Abstract

The utility model belongs to the technical field of detection equipment, and discloses a bell jar coaxiality and flatness detection device, which comprises a base, a center rod is arranged on the base, two extension rods are horizontally arranged on the center rod, and dial indicators are arranged at the end parts, far away from the center rod, of the extension rods; the center rod is connected with the base through a bearing; the extension rod is connected with the center rod through a screw arranged on the center rod in a penetrating mode. The two extension rods are positioned on the same central surface of the central rod; a boss is arranged on the base, and the outer edge of the boss is circular; the device can efficiently detect the coaxiality and flatness of the bell jar, and is simple in structure and convenient to operate.

Description

Technical Field

[0001] This utility model belongs to the technical field of testing equipment, and relates to a testing device, particularly a device for testing the coaxiality and flatness of a bell-shaped jar. Background Technology

[0002] The bell-shaped cover is used to connect the electric motor and the hydraulic pump, serving a positioning and connection function. The coaxiality and flatness of the end face of the bell-shaped cover determine the connection stability and transmission efficiency. Therefore, checking the coaxiality and flatness determines whether the quality of the bell-shaped cover is up to standard.

[0003] The traditional method of checking the coaxiality and flatness of bell jars usually relies on lathes and dial indicators, requiring at least two or more people to complete the coaxiality measurement. The operation process is relatively cumbersome and prone to large measurement errors. At the same time, bell jars are usually made of aluminum alloy, and their machining dimensions are greatly affected by temperature, requiring multiple measurements. Therefore, relatively lightweight and flexible measuring tools are needed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by proposing a device for detecting the coaxiality and flatness of bell-shaped jars that can efficiently detect the coaxiality and flatness of bell-shaped jars, and which has a simple structure and is easy to operate.

[0005] The technical problem to be solved by this utility model is achieved through the following technical solution: a device for detecting the coaxiality and flatness of a bell-shaped jar, comprising a base, a central rod on the base, two horizontally arranged extension rods on the central rod, and a dial indicator at the end of each extension rod away from the central rod; the central rod is connected to the base by a bearing; the extension rods are connected to the central rod by screws passing through the central rod; the two extension rods are located on the same central plane of the central rod; a boss is provided on the base, the outer edge of the boss is circular, and through holes are evenly distributed on the boss for weight reduction, and the dial indicator located below cooperates with the outer edge of the boss.

[0006] Preferably, the two extension rods are arranged one above the other on the center rod, with the length of the lower extension rod being shorter than that of the upper extension rod.

[0007] Preferably, the center rod rotates along the center of the base 3 via the bearing 4; the perpendicularity of the center rod to the base is ≤0.01mm.

[0008] Preferably, the flatness of the upper surface of the base is ≤0.01mm.

[0009] Preferably, the base has a circular cross-section, and the central rod is vertically positioned at the center of the base.

[0010] Preferably, the connection points between the upper and lower extension rods and the central rod are both located on the center line of the central rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is a device for detecting the coaxiality and flatness of bell-shaped covers. It uses a dial indicator and mechanical synchronization principle to solve problems such as measuring the flatness of both ends of the bell-shaped cover and the coaxiality of the holes. This utility model solves the problem of lack of effective tools for detecting the coaxiality and flatness of bell-shaped covers with a simple method and low cost, effectively shortens the time required for detecting the coaxiality and flatness of bell-shaped covers, and improves the detection efficiency. At the same time, it can also be used for the coaxiality detection of cylindrical parts such as copper sleeves. Its structure is simple and the detection is convenient. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram illustrating the method for measuring the coaxiality of a bell-shaped jar according to this utility model.

[0014] Figure 3 This is a schematic diagram illustrating the method for measuring the flatness of a bell-shaped jar according to this invention.

[0015] The components include: center rod 1, screw 2, base 3, bearing 4, dial indicator 5, extension rod 6, and dial indicator 7. Detailed Implementation

[0016] A device for detecting the coaxiality and flatness of a bell-shaped jar, such as Figure 1 As shown, the system includes a base 3, a central rod 1 on the base 3, and two horizontally arranged extension rods 6 on the central rod 1. Each extension rod 6 has a dial indicator at its end furthest from the central rod 1, namely a lower dial indicator 5 and an upper dial indicator 7. The central rod 1 is connected to the base 3 via a bearing 4. The extension rods 6 are connected to the central rod 1 via screws passing through the central rod 1. The two extension rods 6 are located on the same central plane of the central rod 1. The base 3 has a boss with a circular outer edge, and the lower dial indicator 5 mates with the outer edge of the boss.

[0017] Two extension rods 6 are positioned one above the other on the central rod 1, with the lower extension rod 6 being shorter than the upper extension rod. The central rod 1 rotates along the center of the base 3 via a bearing 4. The perpendicularity between the central rod 1 and the base 3 is ≤0.01mm. The base 3 has a circular cross-section, and the central rod 1 is vertically positioned at the center of the base 3. The connection points between the upper and lower extension rods 6 and the central rod 1 are both located on the centerline of the central rod 1.

[0018] like Figure 2As shown, in the actual measurement of the coaxiality of the bell-shaped jar, the bell-shaped jar is first placed on the base 3. The change is displayed by the pointer of the dial indicator 5. The bell-shaped jar is rotated 360° to ensure that circle A is coaxial with the axis of the center rod 1. The bell-shaped jar is then fixed to the base 3. The center rod 1 is rotated again, and the data of the dial indicator 7 is read to measure the coaxiality of circle B relative to circle A.

[0019] like Figure 3 As shown, during the actual measurement of the flatness of the bell-shaped jar, the flatness of surface C is checked again using dial indicator 5. Then, the bell-shaped jar is placed on the base 3, and the position of dial indicator 7 is adjusted to contact the end face D of the bell-shaped jar. The center rod 1 is rotated 360°, and the data of dial indicator 7 is read to measure the flatness of the end face D of the bell-shaped jar.

[0020] The dial indicator 5 below cooperates with the circular boss on the base 3. The dial indicator 5 below is used to check the flatness of the surface C to ensure measurement accuracy. The circular boss on the base 3 is provided so that when the bell-shaped cover is placed on this embodiment, the coaxiality of the circle B and the central rod 1 can be roughly adjusted, and the stability of the bell-shaped cover placed on this embodiment can be ensured, playing a preliminary positioning role.

Claims

1. A device for detecting the coaxiality and flatness of a bell-shaped jar, characterized in that: The device includes a base with a central rod on it. Two extension rods are horizontally mounted on the central rod, and dial indicators are mounted on the ends of the extension rods furthest from the central rod. The central rod is connected to the base via bearings. The extension rods are connected to the central rod via screws that pass through the central rod. The two extension rods are located on the same central plane of the central rod. The base has a boss with a circular outer edge.

2. The bell-shaped jar coaxiality and flatness detection device according to claim 1, characterized in that: Two extension rods are set one above the other on the center rod. The lower extension rod is shorter than the upper extension rod, and the dial indicator at the lower position mates with the outer edge of the boss.

3. The bell-shaped jar coaxiality and flatness detection device according to claim 2, characterized in that: The center rod rotates along the center of the base via a bearing; the perpendicularity of the center rod to the base is ≤0.01mm.

4. The bell-shaped jar coaxiality and flatness detection device according to claim 3, characterized in that: The flatness of the upper surface of the base is ≤0.01mm.

5. The bell-shaped jar coaxiality and flatness detection device according to claim 4, characterized in that: The base has a circular cross-section, and the central rod is vertically positioned at the center of the base.

6. The bell-shaped jar coaxiality and flatness detection device according to claim 5, characterized in that: The connection points of the upper and lower extension rods to the center rod are both located on the center line of the center rod.

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