Multi-section inner diameter testing fixture with floating positioning platform

Abstract

The utility model discloses a multi-section inner diameter testing fixture with a floating positioning platform, which comprises a support, supporting legs are arranged at the bottom of the support, a detection cylinder and a linear bearing are arranged on the support, and a plurality of air nozzles are arranged on the side wall of the detection cylinder from top to bottom; a sliding rod capable of sliding up and down is installed in the linear bearing, a floating disc is arranged at the top of the sliding rod, and the floating disc is arranged on the outer side of the detection cylinder in a sleeving mode; the beneficial effects of the utility model are that the floating disc bears the workpiece to be detected, after the workpiece is placed on the floating disc, the floating disc is driven to move downwards under the action of the self weight of the floating disc, and in the process, the air nozzles located on the side wall of the detection cylinder spray air to detect the inner diameter of the workpiece and output the detection result.

Description

Technical Field

[0001] The utility model relates to the technical field of inner diameter detection of cylinder parts, in particular to a multi-section inner diameter detection tool with a floating positioning platform. Background Art

[0002] Cylinder bore parts are common parts in the machining field. Their inner diameter is one of the key dimensions to ensure the normal operation of the equipment. Therefore, before assembling the finished equipment, its inner diameter needs to be tested. At present, there are four main methods for measuring the inner diameter of various cylinder bores: 1. Three-coordinate point measurement. This measurement method can measure the dimensions of each section of the inner diameter of the cylinder bore, but the measurement time is too long and the efficiency is too low. 2. The inner diameter gauge is used for measurement. This measurement method can measure the inner diameter of the cylinder bore, but the detection efficiency is very low. The accuracy of the detection result depends more on the proficiency of the operator, and the contact measurement is easy to scratch the workpiece. 3. A multi-channel contact sensor is used to directly measure the inner diameter of the cylinder bore. After calibration with a standard part, the workpiece is inserted into the measuring device. The sensor contacts the inner surface of the workpiece and calculates the difference between the display value of each cross-section workpiece and the standard part, thereby obtaining the detection result. This measurement method can measure the inner diameter of the cylinder bore, but the contact measurement is easy to scratch the workpiece and the cost is too high. 4. The inner diameter of the cylinder bore is measured by pneumatic measurement. After calibration with standard parts, the workpiece is inserted into the measuring device, and the difference between the display value of each cross-section workpiece and the standard part is calculated to obtain the test result. This measurement method can measure the inner diameter of the cylinder bore, but the gap between the pneumatic probe and the inner hole of the workpiece is very small. During on-site use, it is difficult to smoothly place the workpiece into the measuring device for larger workpieces.

[0003] The patent with the announcement number "CN113959378A" discloses a "hole inner diameter measuring device", which includes: a base plate; a measuring assembly, which includes a first mounting plate and a pneumatic measuring head arranged on the first mounting plate, the first mounting plate is connected to the base plate, and the pneumatic measuring head is movable along the height direction of the base plate; a calibration assembly, which includes a plurality of calibration gauges, which are movably arranged on the base plate; a clamping assembly, which is used to clamp the workpiece, and the clamping assembly is movably arranged on the base plate to transport the workpiece to the bottom of the pneumatic measuring head. Although it uses a pneumatic measuring head to measure the inner diameter of the workpiece, it can be seen from the drawings in its specification that the workpiece measured by the device is small in size and is not suitable for measuring large-sized workpieces.

[0004] To this end, our company proposes a multi-section inner diameter gauge with a floating positioning platform. Summary of the invention

[0005] The utility model aims to provide a multi-section inner diameter measuring tool with a floating positioning platform, which can realize rapid detection of the inner diameter of a workpiece without damaging the inner wall of the workpiece.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A multi-section inner diameter gauge with a floating positioning platform comprises a support, a support leg is arranged at the bottom of the support, a detection cylinder and a linear bearing are arranged on the support, and a plurality of air nozzles are arranged on the side wall of the detection cylinder from top to bottom;

[0008] A sliding rod which can slide up and down is installed in the linear bearing, a floating plate is arranged on the top of the sliding rod, and the floating plate is sleeved on the outside of the detection tube.

[0009] Preferably, a positioning platform for carrying the workpiece to be measured is provided on the floating plate, and a positioning groove is provided in the positioning platform.

[0010] Preferably, a limit stopper is provided on the support to prevent the floating plate from excessively moving downward.

[0011] Preferably, a spring is sleeved on the outer side of the sliding rod, and two ends of the spring are respectively in contact with the floating plate and the linear bearing.

[0012] Preferably, an air inlet pipe and an air delivery pipe are provided on the support, the air inlet end of the air delivery pipe is connected to the air inlet pipe, and the air outlet end of the air delivery pipe is connected to the air nozzle.

[0013] Preferably, two fixing grooves are symmetrically arranged on the side wall of the detection cylinder, and the multiple air nozzles are installed in the fixing grooves, and the heights of the multiple air nozzles on the two fixing grooves correspond to each other.

[0014] Preferably, the linear bearings and limit blocks are arranged in an array at four locations outside the detection cylinder.

[0015] The beneficial effects of the utility model are:

[0016] 1. The floating plate carries the workpiece to be tested. After the workpiece is placed on the floating plate, it is driven downward by its own weight. During this process, the air nozzle located on the side wall of the detection tube sprays air to detect the inner diameter of the workpiece and output the test results.

[0017] 2. A spring is set outside the sliding rod. The elastic force of the spring matches the deadweight of the workpiece, ensuring that after the workpiece is placed on the floating plate, it can move downward for measurement under a small downward external force. After the measurement is completed, it can move upward under a small upward external force, so that the floating plate can be reset and the workpiece can be removed. The small downward or upward external force should be based on the ease that ordinary workers can apply to reduce the work intensity of the workers.

[0018] 3. A limit stopper is set on the support to prevent the floating plate from moving downward excessively, causing damage to the bottom surface of the workpiece, and at the same time prevent the sliding rod from exceeding the stroke of the linear bearing, providing reliable protection for the inspection fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 It is a three-dimensional diagram of the utility model (without the positioning platform);

[0021] Figure 3 It is a top view of the utility model (removing the positioning platform and floating plate);

[0022] Figure 4 It is a three-dimensional diagram of the utility model from another angle.

[0023] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings.

[0025] Embodiment 1

[0026] like Figure 1 and Figure 2 As shown, the multi-section inner diameter gauge with a floating positioning platform of this embodiment includes a support 1, a support leg 2 is provided at the bottom of the support 1, a detection tube 5 and a linear bearing 3 are provided on the support 1, and multiple air nozzles 9 are provided at different heights from top to bottom on the side wall of the detection tube 5; in some embodiments, the height of the workpiece is shorter, and only one air nozzle 9 is provided at the same height on the side wall of the detection tube 5; and in some embodiments, the height of the workpiece is longer, and the interior of the workpiece is divided into multiple sections with different inner diameters. In order to ensure that the inner diameter size of each section meets the requirements, multiple air nozzles 9 need to be provided on the side wall of the detection tube 5 along the height direction. Figure 2 As shown, in this embodiment, three air nozzles 9 are arranged in the height direction of the side wall of the detection tube 5 .

[0027] A sliding rod 10 that can slide up and down is installed in the linear bearing 3, and a floating plate 7 is arranged on the top of the sliding rod 10. The floating plate 7 is sleeved on the outside of the detection tube 5. During the detection, the workpiece to be tested is placed on the floating plate 7, and the workpiece is pressed down (or the workpiece moves down under its own weight), driving the sliding rod 10 to move down in the linear bearing 3. During this process, the air nozzle 9 gradually enters the interior of the workpiece. After moving down to a suitable distance, the air nozzle 9 starts to spray air to detect the inner diameter of the workpiece.

[0028] In order to better install and position the workpiece, a positioning platform 6 for carrying the workpiece to be tested is provided on the floating plate 7, and a positioning groove 61 is provided in the positioning platform 6. When placing the workpiece, the flange at the end of the workpiece can be positioned through the positioning groove 61 to prevent the inner wall of the workpiece from rubbing against the outer wall of the detection tube 5 due to inaccurate positioning during the downward movement, thereby causing damage to the equipment and products and reducing the detection efficiency.

[0029] In order to prevent the workpiece from moving downward excessively, causing the bottom surface of the workpiece (a workpiece with one end open and the other end closed) to rub against the top surface of the detection tube 5, thereby damaging the workpiece; or causing the sliding rod 10 to exceed the stroke of the linear bearing 3, thereby causing the inspection fixture to malfunction; in this embodiment, a limit stopper 4 is provided on the support 1, and when the workpiece moves downward to the limit position, the floating plate 7 contacts the limit stopper 4, and the workpiece cannot move downward further.

[0030] A spring 11 is sleeved on the outside of the sliding rod 10, and the two ends of the spring 11 are respectively in contact with the floating plate 7 and the linear bearing 3. The elastic force of the spring 11 matches the deadweight of the workpiece, ensuring that after the workpiece is placed on the floating plate 7, it can be moved downward for measurement under the action of a small downward external force. After the measurement is completed, it can be moved upward under the action of a small upward external force, so that the floating plate 7 is reset, making it convenient to remove the measured workpiece and place the workpiece to be measured. The small downward or upward external force is based on the ease with which ordinary workers can apply it, so as to reduce the work intensity of the workers.

[0031] like Figure 4 As shown, an air inlet pipe 12 and an air delivery pipe 13 are provided on the support 1 , the air inlet end of the air delivery pipe 13 is connected to the air inlet pipe 12 , and the air outlet end of the air delivery pipe 13 is connected to the air nozzle 9 .

[0032] like Figure 3 As shown, two fixed grooves 8 are symmetrically arranged on the side wall of the detection tube 5, and the multiple air nozzles 9 on the two fixed grooves 8 correspond in height to each other. The air nozzles 9 at the same height on the two fixed grooves 8 are grouped in pairs to improve the measurement accuracy.

[0033] The linear bearings 3 and the limit blocks 4 are arranged in an array at four locations outside the detection tube 5, so that the floating plate 7 and the workpiece are subjected to uniform force.

[0034] During the inspection, the utility model first places the workpiece to be inspected on the positioning table 6, with the workpiece flange located in the positioning groove 61, and then gently presses down the end of the workpiece, so that the workpiece and the positioning table 6, the floating plate 7, and the sliding rod 10 move downward smoothly as a whole, until the bottom of the floating plate 7 contacts the limit stopper 4, and then the air inlet pipe 12 supplies air to the air nozzle 9 through the air delivery pipe 13, and the inner diameter of the workpiece is inspected through the air jet of the air nozzle 9. During the inspection process, the workpiece can be slowly rotated to achieve an overall inspection of its inner diameter. After the inspection is completed, the floating plate 7 is gently lifted, and under the action of the spring 11, the workpiece and the positioning table 6, the floating plate 7, and the sliding rod 10 move upward smoothly as a whole, until they are reset. At this time, the workpiece that has been inspected can be removed, and then the next workpiece to be inspected can be placed on top for inspection.

[0035] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the protection scope of the technical solution of the utility model.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0037] If the words "first", "second" and so on are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description. Unless otherwise stated, the above words have no special meaning.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A multi-section inner diameter gauge with a floating positioning platform, comprising a support, a support leg is provided at the bottom of the support, and is characterized in that: The support is provided with a detection cylinder and a linear bearing, and the side wall of the detection cylinder is provided with multiple air nozzles from top to bottom; A sliding rod which can slide up and down is installed in the linear bearing, a floating plate is arranged on the top of the sliding rod, and the floating plate is sleeved on the outside of the detection tube.

2. The multi-section inner diameter gauge with floating positioning platform according to claim 1, characterized in that: The floating plate is provided with a positioning platform for carrying the workpiece to be measured, and a positioning groove is provided in the positioning platform.

3. The multi-section inner diameter gauge with floating positioning platform according to claim 1, characterized in that: The support is provided with a limit stopper to prevent the floating plate from excessively moving downward.

4. The multi-section inner diameter gauge with floating positioning platform according to claim 1, characterized in that: A spring is sleeved on the outer side of the sliding rod, and two ends of the spring are respectively in contact with the floating plate and the linear bearing.

5. The multi-section inner diameter gauge with floating positioning platform according to claim 1, characterized in that: An air inlet pipe and an air delivery pipe are arranged on the support, the air inlet end of the air delivery pipe is connected to the air inlet pipe, and the air outlet end of the air delivery pipe is connected to the air nozzle.

6. The multi-section inner diameter gauge with floating positioning platform according to claim 1, characterized in that: The side wall of the detection cylinder is symmetrically provided with two fixed grooves, and the multiple air nozzles are installed in the fixed grooves, and the heights of the multiple air nozzles on the two fixed grooves correspond to each other.

7. The multi-section inner diameter gauge with floating positioning platform according to claim 3, characterized in that: The linear bearings and the limit blocks are arranged in an array at four locations outside the detection cylinder.

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