A device for quickly measuring camshaft base circle runout

Abstract

The utility model relates to a device of quick measurement camshaft base circle runout belongs to mechanical measurement technical field. At least including dial gauge, V type block seat body, support and lock the element of fixed on the support, the lock the element includes support fastening screw and dial gauge fastening screw, the dial gauge is fixed on the support through dial gauge fastening screw, the support is fixed on V type block seat body through support fastening screw, the dial gauge's measuring pin contacts cam base circle. The utility model can avoid the measurement deviation caused by displacement, promote the measurement accuracy, and the utility model can simplify data acquisition process, improve the measurement efficiency.

Description

Technical Field

[0001] This utility model relates to a device for rapidly measuring the runout of the base circle of a camshaft, belonging to the field of mechanical measurement technology. Background Technology

[0002] As a core component of the valve train in an internal combustion engine, the camshaft's machining accuracy directly affects the engine's power performance, combustion efficiency, and operational stability. Among these, the runout of the camshaft base circle is a key indicator of its machining quality. Excessive runout can lead to valve lift errors and valve timing misalignments, subsequently causing engine noise, power loss, and even premature wear. Therefore, accurate and efficient measurement of the camshaft base circle runout is crucial in the manufacturing and quality inspection processes. Currently, the measurement of camshaft base circle runout and dimensions is affected by factors such as operator skill, equipment precision, material condition, process methods, and environment, easily resulting in low measurement efficiency and unstable accuracy. Existing measuring devices often require removing parts from the production line for offline testing, which is cumbersome and cannot achieve rapid online measurement, failing to meet the demands of efficient production and real-time quality monitoring. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides a device for quickly measuring the runout of the camshaft base circle. This invention can avoid measurement deviations caused by displacement and improve measurement accuracy; moreover, this invention can simplify the data acquisition process and improve measurement efficiency.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: it includes at least a dial indicator, a V-block seat, a bracket, and a locking element fixed on the bracket; the locking element includes a bracket fastening screw and a dial indicator fastening screw, the dial indicator is fixed on the bracket by the dial indicator fastening screw, the bracket is fixed on the V-block seat by the bracket fastening screw, and the probe of the dial indicator is in contact with the base circle of the cam.

[0005] Moreover, the V-groove of the V-shaped block seat is in close contact with the journal of the shaft part to be tested, and can rotate on the journal around the axis of the shaft part to be tested.

[0006] Furthermore, the extension direction of the bracket is parallel to the axial centerline of the shaft-like part to be tested.

[0007] Furthermore, the runout value of the cam base circle is obtained by measuring the difference between the maximum and minimum values ​​displayed by a dial indicator during the measurement process.

[0008] Furthermore, the size of the cam base circle is obtained by the deviation between the value measured by a dial indicator and the zero-digit value calibrated by a standard sample.

[0009] As can be seen from the above technical solution, the device for quickly measuring the base circle runout of a camshaft provided by this utility model has the following advantages over the prior art:

[0010] (1) Because in the technical solution adopted by this utility model, the bracket is fixed to the dial indicator and the V-block seat respectively by fastening screws, this utility model can ensure that the connection of each component is stable during the measurement process, avoid measurement deviation due to displacement, and improve measurement stability.

[0011] (2) Because in the technical solution adopted by this utility model, the V-groove of the V-block seat is in close contact with the journal of the shaft part to be measured and can rotate around its axis, and the extension direction of the bracket is parallel to the axial centerline of the shaft part to be measured, this utility model can make the dial indicator probe always in contact with the cam base circle at a reasonable angle, which facilitates the rapid completion of full circumference measurement and improves the ease of operation.

[0012] (3) Because in the technical solution adopted by this utility model, the runout of the cam base circle is obtained by the difference between the maximum and minimum values ​​of the dial indicator, and the base circle size is obtained by the deviation between the measured value and the zero value of the standard sample calibration, this utility model can simplify the data calculation process, reduce manual operation error, realize the rapid acquisition of measurement results, and improve measurement efficiency. Attached Figure Description

[0013] Figure 1 Left view of a device for rapidly measuring the base circle runout of a camshaft;

[0014] Figure 2 Front view of a device for rapidly measuring the base circle runout of a camshaft.

[0015] In the figure: 1. Journal of the shaft part to be tested; 2. Bracket fastening screw; 3. Bracket; 4. V-block seat; 5. Dial indicator fastening screw; 6. Dial indicator. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0017] The present invention provides a device for rapidly measuring the base circle runout of a camshaft, the structure of which is as follows: Figure 1 and Figure 2 As shown, it includes at least a dial indicator 6, a V-block seat 4, a bracket 3, and a locking element fixed on the bracket. The locking element includes a bracket fastening screw 2 and a dial indicator fastening screw 5. The dial indicator 6 is fixed on the bracket by the dial indicator fastening screw 5, and the bracket 3 is fixed on the V-block seat 4 by the bracket fastening screw 2. The probe of the dial indicator 6 is in contact with the base circle of the cam.

[0018] Furthermore, the V-groove of the V-shaped block seat is in close contact with the journal 1 of the shaft part to be tested, and can rotate on the journal around the axis of the shaft part to be tested.

[0019] Furthermore, the extension direction of the bracket 3 is parallel to the axial centerline of the shaft-like part to be tested.

[0020] Furthermore, the runout value of the cam base circle is obtained by measuring the difference between the maximum and minimum values ​​displayed by dial indicator 6 during the measurement process.

[0021] Furthermore, the dimensions of the cam base circle are obtained by measuring the value using dial indicator 6 and comparing it with the zero-digit value calibrated from the standard sample.

[0022] like Figure 1 and Figure 2 As shown, the actual usage process is as follows:

[0023] Assembly process: Fix dial indicator 6 to bracket 3 with dial indicator fastening screw 5, ensuring that the probe of dial indicator 6 faces the base circle of the cam to be measured; then fix bracket 3 vertically to V-block seat 4 with bracket fastening screw 2, and adjust the position of bracket 3 so that the extension direction of bracket 3 is parallel to the axial centerline of the shaft part to be measured.

[0024] Calibration process: Select a standard sample (the dimensions and runout of its spindle journal and cam base circle are known standard values), place the V-groove of the V-block seat 4 tightly against the journal of the standard sample, adjust the probe of the dial indicator 6 to contact the cam base circle of the standard sample, rotate the standard sample or the V-block seat 4, and after confirming that the probe is in stable contact with the base circle, adjust the dial indicator 6 to zero.

[0025] Measurement process: Move the device to the camshaft to be measured, ensuring that the V-groove of the V-block seat 4 is in close contact with the journal 1 of the shaft part to be measured, and that the bracket 3 is parallel to the axial centerline of the camshaft to be measured; slowly rotate the V-block seat 4 around the axis of the camshaft to be measured, and the probe of the dial indicator 6 moves with the contour of the cam base circle. Record the maximum and minimum values ​​displayed by the dial indicator 6; the difference between the two values ​​is the runout of the cam base circle to be measured; at the same time, determine the size of the cam base circle based on the deviation between the real-time reading of the dial indicator 6 and the zero position (a positive reading indicates that the size of the base circle to be measured is greater than the standard value; a negative reading indicates that the size of the base circle to be measured is less than the standard value); move the V-block seat 4 axially and repeat the above measurement steps. The presence of taper in the cam can be determined by the size difference at different positions.

[0026] The device of this invention has a simple structure and is easy to operate. It provides a device that can quickly and accurately achieve online measurement, and is simple in structure and low in cost. It can be widely used in online rapid inspection in camshaft production sites, effectively improving production efficiency and quality control.

Claims

1. A device for rapidly measuring the base circle runout of a camshaft, comprising at least a dial indicator, a V-block seat, a bracket, and a locking element fixed to the bracket, characterized in that: The locking element includes a bracket fastening screw and a dial indicator fastening screw. The dial indicator is fixed to the bracket by the dial indicator fastening screw, and the bracket is fixed to the V-block seat by the bracket fastening screw. The probe of the dial indicator is in contact with the base circle of the cam.

2. The device for rapidly measuring the base circle runout of a camshaft according to claim 1, characterized in that: The V-groove of the V-block seat is in close contact with the journal of the shaft part to be tested, and can rotate on the journal around the axis of the shaft part to be tested.

3. The device for rapidly measuring the base circle runout of a camshaft according to claim 1, characterized in that: The extension direction of the bracket is parallel to the axial centerline of the shaft-like part to be tested.

4. The device for rapidly measuring the base circle runout of a camshaft according to claim 1, characterized in that: The runout value of the cam base circle is obtained by measuring the difference between the maximum and minimum values ​​displayed by a dial indicator.

5. The device for rapidly measuring the base circle runout of a camshaft according to claim 1, characterized in that: The dimensions of the cam base circle are obtained by comparing the measured values ​​with the zero-digit values ​​calibrated from the standard sample using a dial indicator.

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