Air valve guide pipe coaxiality detection device

Abstract

The utility model discloses a valve guide pipe coaxiality detection device, which comprises a base, a fixing rod, a supporting piece and a measuring instrument, and is characterized in that the supporting piece comprises a guide rod and a fixing block, a to-be-detected workpiece is arranged on the guide rod in a penetrating manner, the diameter of the guide rod is matched with the inner aperture of the to-be-detected workpiece, and the to-be-detected workpiece is driven to measure the coaxiality of the to-be-detected workpiece; the to-be-detected workpiece does linear motion along the axis of the guide rod and rotates by taking the axis of the guide rod as a center; the measuring instrument is perpendicular to the outer wall face of the workpiece to be measured and comprises a measuring pointer, and when the workpiece to be measured moves or rotates on the guide rod, the end of the measuring pointer abuts against the outer wall face of the workpiece to be measured. According to the utility model, the guide rod is arranged, the to-be-detected workpiece is sleeved on the guide rod, the to-be-detected workpiece is in a suspended state, the measuring pointer is in contact with the outer wall surface of the to-be-detected workpiece, the to-be-detected workpiece is driven to rotate by one circle, the data of the measuring instrument is read, and the detection accuracy is ensured through multi-section measurement. And the detection efficiency can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, and in particular to a valve guide coaxiality testing device. Background Technology

[0002] Valve guides are crucial components in the engine's valve train, typically long and slender tubular structures. Misalignment of the valve guides can trigger a chain reaction, leading to problems such as poor valve sealing and valve sticking. This can further affect the operation of other engine components like the piston, piston rings, and cylinder walls, increasing their wear and damage risk. By monitoring and ensuring the coaxiality of the valve guides, the entire engine's components can be effectively protected, extending the engine's overall lifespan.

[0003] Existing methods for measuring the coaxiality of valve guides mostly employ the dial indicator method, which uses two blade-shaped V-blocks to simulate a reference axis to measure the coaxiality of shaft-like parts. This method is cumbersome to adjust, has low testing efficiency, and is limited by the base and testing tools, often only allowing measurement points at both ends. For longer valve guides, the number of selectable measurement points is even smaller, making it impossible to accurately calculate the coaxiality of the workpiece under test, which can easily lead to measurement errors. Utility Model Content

[0004] The purpose of this invention is to provide a valve guide coaxiality testing device to solve the problems in the prior art. It can measure the coaxiality of multiple sections of the workpiece under test, thereby improving the testing accuracy.

[0005] This utility model provides a valve guide coaxiality testing device for measuring the coaxiality of a workpiece, comprising:

[0006] The base, fixing rod, support components, and measuring instrument include:

[0007] The fixed rod is vertically mounted on the base, and the support member is horizontally mounted on the fixed rod. The support member includes a guide rod and a fixed block. The fixed block is connected to the fixed rod, and the guide rod is connected to one side of the fixed block. The workpiece to be tested is inserted through the guide rod. The diameter of the guide rod is adapted to the inner diameter of the workpiece to be tested. The workpiece to be tested is driven to make it move linearly along the axis of the guide rod and rotate around the axis of the guide rod.

[0008] The measuring instrument is set perpendicular to the outer wall surface of the workpiece to be measured. The measuring instrument includes a measuring pointer. When the workpiece to be measured moves or rotates on the guide rod, the end of the measuring pointer abuts against the outer wall surface of the workpiece to be measured.

[0009] In the valve guide coaxiality detection device described above, preferably, the fixing block has a first mounting hole, the fixing rod is disposed through the first mounting hole, and the fixing block can move linearly along the axis of the fixing rod; a first fixing nut is provided on the side of the fixing block away from the guide rod, the first fixing nut is used to lock or unlock the fixing block and the fixing rod.

[0010] In the valve guide coaxiality detection device described above, preferably, a clamping member is provided between the fixing block and the guide rod, and the clamping member is detachably connected to the guide rod.

[0011] In the valve guide coaxiality testing device described above, preferably, the fixed rod is provided with a support rod parallel to the guide rod, and the measuring instrument is mounted on the support rod.

[0012] In the valve guide coaxiality detection device described above, preferably, the fixing rod has a second mounting hole, the support rod passes through the second mounting hole, and a second fixing nut is provided on one side of the fixing rod, the second fixing nut being used to lock or unlock the support rod and the fixing rod.

[0013] In the valve guide coaxiality testing device described above, preferably, a third fixing nut is provided on the side of the support rod near the measuring instrument, the third fixing nut being used to lock or unlock the measuring instrument and the support rod.

[0014] In the valve guide coaxiality testing device described above, preferably, the measuring instrument includes a dial indicator or a micrometer.

[0015] In the valve guide coaxiality testing device described above, preferably, the difference between the diameter of the guide rod and the inner diameter of the workpiece to be tested is 0-0.05 mm.

[0016] In the valve guide coaxiality detection device described above, preferably, adjusting screws are provided at the four corners of the bottom of the base.

[0017] Compared with the prior art, this utility model sets up a guide rod, on which the workpiece to be tested is placed, so that the workpiece is suspended in the air. The measuring instrument is set perpendicular to the outer wall surface of the workpiece, and the measuring pointer contacts the outer wall surface of the workpiece. The workpiece is driven to rotate one revolution, and the data of the measuring instrument is read. The workpiece is then driven to move on the guide rod, so that the measuring instrument can measure the value at any position of the workpiece. Through multi-segment measurement, the detection accuracy is ensured. In addition, the detection operation of this application is simple and can effectively improve the detection efficiency. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 10 - Base; 11 - Adjusting screw;

[0021] 20 - Fixed rod;

[0022] 30 - Guide rod, 31 - Fixing block, 310 - First mounting hole, 32 - First fixing nut, 33 - Clamping element;

[0023] 40 - Measuring instrument, 41 - Measuring pointer, 42 - Support rod, 420 - Second mounting hole, 43 - Second fixing nut, 44 - Third fixing nut;

[0024] 50 – Workpiece to be tested. Detailed Implementation

[0025] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] See Figure 1 As shown, this utility model provides a valve guide coaxiality detection device, including a base 10, a fixing rod 20, a support member, and a measuring instrument 40, wherein: the fixing rod 20 is disposed on the base 1 in a vertical direction; in the embodiment provided in this application, the fixing rod 20 is disposed on the side of the base 1 near the edge.

[0027] A support member is horizontally mounted on a fixed rod 20. The support member includes a guide rod 30 and a fixed block 31. The fixed block 31 is connected to the fixed rod 20, and the guide rod 30 is connected to one side of the fixed block 31. The workpiece to be tested 50 is inserted through the guide rod 30. The diameter of the guide rod 30 is adapted to the inner hole of the workpiece to be tested 50. The workpiece to be tested 50 is driven to make it move linearly along the axis of the guide rod 30 and rotate around the axis of the guide rod 30. In the embodiment provided in this application, the axis of the guide rod 30 is used as a reference axis. A core rod with extremely high precision and a smooth surface is selected. There is a certain distance between the support member and the base 10, so that the workpiece to be tested 50 is suspended, which is convenient for subsequent testing. The workpiece to be tested is a valve guide. The smaller the gap between the workpiece to be tested 50 and the guide rod 30 when they rotate on the guide rod 30, the more accurate the test result. The difference between the diameter of the guide rod 30 and the inner hole diameter of the workpiece to be tested 50 is 0-0.05mm. In this embodiment, the difference between the diameter of the guide rod 30 and the inner diameter of the workpiece 50 to be tested is 0.05 mm. This ensures that the outer wall surface of the guide rod 30 fits as closely as possible to the inner wall surface of the workpiece 50 to be tested, while also ensuring that the workpiece 50 to be tested can rotate and move easily relative to the guide rod 30.

[0028] The measuring instrument 40 is perpendicular to the outer wall surface of the workpiece 50 to be measured. The measuring instrument 40 includes a measuring pointer 41. When the workpiece 50 to be measured moves or rotates on the guide rod 30, the end of the measuring pointer 41 is always in contact with the outer wall surface of the workpiece 50. In the embodiment provided in this application, the perpendicularity of the measuring instrument 40 to the outer wall surface of the workpiece 50 to be measured ensures the accuracy of the measurement data. The contact between the measuring pointer 41 and the outer wall surface of the workpiece 50 to be measured enables precise measurement of the coaxiality of the workpiece 50. The workpiece 50 to be measured can move linearly on the guide rod 30 to select multiple different positions as measurement points. The workpiece 50 to be measured can rotate on the guide rod 30 to rotate one revolution to measure its data.

[0029] The specific operating steps are as follows: Place the workpiece 50 to be tested on the guide rod 30, and make the measuring pointer 41 abut against the outer wall surface of the workpiece 50. Manually rotate the workpiece 50 one revolution, and read the value through the measuring instrument 40. Move the relative position of the workpiece 50 on the guide rod 30 multiple times, and multiple positions can be selected for measurement in segments. According to the recorded test results, you can check whether the product meets the drawing requirements. The measurement process is no longer limited by the length of the workpiece 50 to be tested. You can select any position to take multiple values, so the coaxiality value obtained is highly accurate, and the test process is simple and easy to operate.

[0030] The workpiece 50 to be measured can be driven by manual rotation or by other driving devices, which is not limited here. In addition, the measuring instrument 40 can be set on the coaxiality measuring device, or it can be placed near the workpiece 50 to be measured by other components, as long as the measuring instrument 40 is perpendicular to the workpiece 50 to be measured and the measuring pointer 41 is in contact with the outer wall surface of the workpiece 50 to be measured, which is not limited here.

[0031] In one possible implementation, see [link to implementation details]. Figure 1As shown, to ensure that the outer wall surface of the workpiece 50 to be measured can contact the measuring pointer 41, a support member is provided that can be adjusted vertically. Specifically, a first mounting hole 310 is provided on the fixing block 31, and a fixing rod 20 is inserted through the first mounting hole 310. The fixing block 31 can move linearly along the axis of the fixing rod 20. A first fixing nut 32 is provided on the side of the fixing block 31 away from the guide rod 30. The first fixing nut 32 is used to lock or unlock the fixing block 31 and the fixing rod 20. In the embodiment provided in this application, the fixing block 31 can slide up and down along the fixing rod 20. When the measuring instrument 40 is set to a non-movable state, the height of the guide rod 30 can be adjusted so that the workpiece 50 to be measured can contact the measuring pointer 41. For workpieces 50 of different sizes with different diameters, adjusting the height of the guide rod 30 can better accommodate workpieces 50 of different sizes. Furthermore, the measuring instrument 40 can also be set to be movable, so that the measuring pointer 41 can contact the workpiece 50 to be measured by moving the measuring instrument 40. This is not limited here. Furthermore, the locking and unlocking of the fixing block 31, the fixing rod 20 and the first fixing nut 32 are existing technologies. In this application, it is sufficient that the fixing block 31 and the fixing rod 20 do not move when locked and are locked securely. The specific structure will not be described in detail here.

[0032] Further, see Figure 1 As shown, in order to accommodate workpieces 50 with different inner diameters, a corresponding guide rod 30 is required as a reference axis. Therefore, a clamping member 33 is provided between the fixing block 31 and the guide rod 30, and the clamping member 33 is detachably connected to the guide rod 30. The clamping member 33 is used to clamp the guide rod 30. In the embodiment provided in this application, the clamping member 33 is a drill chuck. The drill chuck clamping can firmly fix the guide rod 30 on the spindle, preventing drill bit deviation, ensuring the accuracy of the reference axis, and reducing measurement errors. In addition, the drill chuck can quickly position and replace the guide rod 30, saving time in adjusting and fixing the guide rod 30. The drill chuck also facilitates the replacement of core rods of different sizes, increasing the applicability of the device.

[0033] In one possible implementation, see [link to implementation details]. Figure 1As shown, the measuring instrument 40 is a high-precision measuring instrument. When the measuring instrument 40 and the guide rod 30 are kept relatively stationary, the measurement results will be more accurate. Therefore, in this application, the fixed rod 20 is provided with a support rod 42 parallel to the guide rod 30, and the measuring instrument 40 is mounted on the support rod 42. The support rod 42 is used to fix the measuring instrument 40. The support rod 42 is preferably positioned above the fixed rod 20, parallel to the guide rod 30 and located on the same side. The length of the support rod 42 is the same as the length of the guide rod 30. The measuring instrument 40 is positioned on the side of the support rod 42 away from the fixed rod 20. The length of the guide rod 30 is preferably greater than that of the various workpieces 50 to be measured. Because the measuring instrument 40 is positioned on the side away from the fixed rod 20, when the workpiece 50 to be measured is moved, the entire workpiece 50 can pass under the measuring instrument 40, thus ensuring that any position of the workpiece 50 can be selected for measurement, which can improve the accuracy of product coaxiality detection.

[0034] Further, see Figure 1 As shown, a second mounting hole 420 is provided on the fixed rod 20, and the support rod 42 passes through the second mounting hole 420. A second fixing nut 43 is provided on one side of the fixed rod 20, which is used to lock or unlock the support rod 42 and the fixed rod 20. The support rod 42 and the fixed rod 20 are detachably connected for easy replacement. The support rod 42 is made of high-precision steel pipe to ensure that the support rod 42 and the fixed rod 20 are parallel to each other. In the embodiment provided in this application, the fixed rod 20 has a hole corresponding to the second fixing nut 43, and the second fixing nut 43 is connected to the support rod 42 through the hole. Therefore, the position of the support rod 42 relative to the fixed rod 20 is also adjustable and detachable, increasing the multi-scenario application of the device.

[0035] See Figure 1 As shown, to facilitate the replacement of the measuring instrument 40, in this application, a third fixing nut 44 is provided on the side of the support rod 42 near the measuring instrument 40. The third fixing nut 44 is used to lock or unlock the measuring instrument 40 to the support rod 42. During repeated use, the measuring instrument 40 may shift to a certain extent. After straightening the measuring instrument 40, the third fixing nut 44 is adjusted to keep the measuring instrument 40 vertical. Furthermore, different measuring instruments 40 can be replaced by adjusting the third fixing nut 44.

[0036] Further, see Figure 1 As shown, the measuring instrument 40 includes a dial indicator or a micrometer. The coaxiality of the workpiece 50 to be tested is measured by the dial indicator or micrometer. First, the dial indicator or micrometer is adjusted so that the small pointer points to 1 and the large pointer points to 0. The guide rod 30 is fixed as the reference axis. The workpiece 50 to be tested is placed on the guide rod 30. The workpiece 50 to be tested is rotated manually for one revolution, and the data is recorded. The coaxiality of each segment of the product may be different. During the test, the product can be divided into multiple segments for testing, and the maximum value is taken. At this time, the maximum value represents the coaxiality of the tested product.

[0037] Further, see Figure 1 As shown, sometimes the workbench used for measurement may be unstable due to the working conditions of the workbench. In order to ensure the stability of the measurement data, adjustment screws 11 are provided at the four corners of the bottom of the base 1. The adjustment screws 11 can adjust the level of the base 1 in a fine manner to ensure the stability during measurement. In addition, to ensure levelness, a bubble level or similar device can be installed on the base 1.

[0038] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A valve guide coaxiality detection device, characterized in that, include: The base, fixing rod, support components, and measuring instrument include: The fixed rod is vertically mounted on the base, and the support member is horizontally mounted on the fixed rod. The support member includes a guide rod and a fixed block. The fixed block is connected to the fixed rod, and the guide rod is connected to one side of the fixed block. The workpiece to be tested is inserted through the guide rod, and the diameter of the guide rod is adapted to the inner hole of the workpiece to be tested. The workpiece to be tested is driven to make it move linearly along the axis of the guide rod and rotate around the axis of the guide rod. The measuring instrument is set perpendicular to the outer wall surface of the workpiece to be measured. The measuring instrument includes a measuring pointer. When the workpiece to be measured moves or rotates on the guide rod, the end of the measuring pointer abuts against the outer wall surface of the workpiece to be measured.

2. The valve guide coaxiality detection device according to claim 1, characterized in that, The fixing block has a first mounting hole, and the fixing rod is inserted through the first mounting hole. The fixing block can move up and down along the axis of the fixing rod. The fixing block is provided with a first fixing nut on the side away from the guide rod. The first fixing nut is used to lock or unlock the fixing block from the fixing rod.

3. The valve guide coaxiality detection device according to claim 1, characterized in that, A clamping element is provided between the fixing block and the guide rod, and the clamping element is detachably connected to the guide rod.

4. The valve guide coaxiality detection device according to claim 1, characterized in that, The fixed rod is provided with a support rod parallel to the guide rod, and the measuring instrument is mounted on the support rod.

5. The valve guide coaxiality detection device according to claim 4, characterized in that, The fixing rod has a second mounting hole, and the support rod passes through the second mounting hole. A second fixing nut is provided on one side of the fixing rod, and the second fixing nut is used to lock or unlock the support rod and the fixing rod.

6. The valve guide coaxiality detection device according to claim 4, characterized in that, A third fixing nut is provided on the side of the support rod near the measuring instrument. The third fixing nut is used to lock or unlock the measuring instrument from the support rod.

7. The valve guide coaxiality detection device according to claim 1, characterized in that, The measuring instrument includes a dial indicator or a micrometer.

8. The valve guide coaxiality detection device according to claim 1, characterized in that, The difference between the diameter of the guide rod and the inner diameter of the workpiece to be tested is 0-0.05 mm.

9. The valve guide coaxiality detection device according to claim 1, characterized in that, Adjustment screws are provided at the four corners of the bottom of the base.

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