Cam stroke measuring device for railway locomotive valve
By designing a cam stroke measuring device for railway locomotive valves, using pushers and vertical frames to clamp the cam box assembly, and combining with a dial meter to measure the cam stroke, the problem of low cam measurement efficiency is solved and efficient and accurate cam stroke detection is achieved.
Patent Information
- Application Number
- CN202422836596.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In the prior art, the cam stroke measurement efficiency of railway locomotive valves is low, time-consuming and labor-intensive, and it is difficult to ensure measurement accuracy.
A cam stroke measuring device for railway locomotive valves is designed, including a base plate, support, horizontal cylinder, arc-shaped push plate, vertical frame and dial meter. The cam box assembly is clamped with push hands and vertical frames, and the cam stroke is measured through the dial meter to simulate the displacement of the cam during working process.
It significantly improves measurement efficiency and accuracy, saves simple operation and saves time and effort, ensures the cam assembly pass rate, and avoids the impact of unqualified stroke on the performance of the locomotive valve.
Smart Images
Figure CN223138543U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of railway locomotive valve part measuring devices, and particularly relates to a device for measuring the cam stroke of a railway locomotive valve. Background Art
[0002] The locomotive valve of a railway diesel locomotive contains a cam box structure. Four cams are connected in series by a rotating shaft in the cam box. The operating strokes of three of the cams need to be detected to ensure that the cams push out the corresponding plungers by a certain stroke, so as to open and close different valve ports, thereby realizing the function of quantitatively increasing or decreasing the pressure of the locomotive brake. However, when measuring the strokes of the three cams at present, it is time-consuming and laborious, and the measurement efficiency is low. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a device for measuring the cam stroke of a railway locomotive valve with reasonable structure and reliable use, which solves the problem of low measurement efficiency, is convenient to operate, saves time and effort, significantly improves the measurement efficiency, and ensures the measurement accuracy.
[0004] The technical solution of the utility model is as follows:
[0005] A device for measuring the cam stroke of a railway locomotive valve includes a bottom plate and a dial indicator. The technical key points are: a support is arranged on one side of the upper surface of the bottom plate, and a horizontal air cylinder is arranged on the support. The end of the cylinder rod of the horizontal air cylinder is provided with a pusher, and an arc-shaped push plate is arranged at the front end of the pusher. A vertical frame corresponding to the arc-shaped push plate is arranged on the other side of the upper surface of the bottom plate. The vertical frame has a vertical surface that is closely connected to the flange end face of the workpiece to be measured. The number of dial indicators is three, and the three dial indicators are fixedly arranged at intervals along the height direction of the vertical frame. The measuring heads of the dial indicators pass through the vertical surface and point to the cams of the workpiece to be measured.
[0006] For the above-mentioned device for measuring the cam stroke of a railway locomotive valve, the vertical frame is provided with a plurality of horizontal through holes at intervals from top to bottom. The center line of the horizontal through holes is parallel to the center line of the horizontal air cylinder, and the center line of the horizontal air cylinder and the center lines of the respective horizontal through holes are located in the same vertical plane. The shaft tubes of the dial indicators are fixed in the corresponding horizontal through holes.
[0007] The above-mentioned device for measuring the cam stroke of a railway locomotive valve further includes a handle for connecting with the upper end of the camshaft of the workpiece to be measured, so as to facilitate operation.
[0008] For the above-mentioned device for measuring the cam stroke of a railway locomotive valve, the arc center line of the arc-shaped push plate is perpendicular to the horizontal plane.
[0009] The beneficial effects of the utility model are:
[0010] This device is used to detect the stroke of the cam in the cam box assembly. When in use, the outer shell of the cam box assembly to be detected is clamped by the arc-shaped push plate of the pusher and the vertical surface of the vertical frame. During the detection process, the camshaft drives three cams to rotate, and then three dial indicators corresponding to the cams respectively measure. The measurement operation is simple and convenient, truly simulating the actual displacement of the cam during the working process, with high measurement accuracy, and at the same time significantly improving the measurement efficiency, saving time and effort. This device can ensure a certain qualified rate of the assembly of the cam, avoiding the influence of unqualified cam stroke on the performance of the locomotive valve. Brief Description of the Drawings
[0011] Figure 1 is the structural schematic diagram of the present utility model;
[0012] Figure 2 is the usage state diagram of the present utility model.
[0013] In the figure: 1. Support, 2. Horizontal cylinder, 3. Arc-shaped push plate, 4. Test piece, 401. Cam, 402. Flange end face, 403. Outer shell, 404. Camshaft, 5. Vertical frame, 6. Dial indicator, 7. Base plate, 8. Handle. Detailed Embodiment
[0014] The present utility model will be described in detail according to the attached drawings of the specification.
[0015] As Figure 1 , Figure 2 shown, the device for measuring the cam stroke of the railway locomotive valve includes a base plate 7 and a dial indicator 6.
[0016] Among them, a support 1 is provided on one side of the upper surface of the base plate 7, and a horizontal cylinder 2 is provided on the support 1. The end of the cylinder rod of the horizontal cylinder 2 is provided with a pusher, and an arc-shaped push plate 3 is provided at the front end of the pusher. The arc center line of the arc-shaped push plate 3 is perpendicular to the horizontal plane. A vertical frame 5 corresponding to the arc-shaped push plate 3 is provided on the other side of the upper surface of the base plate 7. The vertical frame 5 has a vertical surface that is closely connected to the flange end face 402 of the test piece 4. The number of the dial indicators 6 is three, and the three dial indicators 6 are fixedly spaced along the height direction of the vertical frame 5. The measuring head of the dial indicator 6 passes through the vertical surface and points to the cam 401 of the test piece 4.
[0017] In this embodiment, the vertical frame 5 is provided with a plurality of horizontal through holes at intervals from top to bottom. The center line of the horizontal through holes is parallel to the center line of the horizontal cylinder 2, and the center line of the horizontal cylinder 2 and the center lines of the respective horizontal through holes are located in the same vertical plane. The shaft tube of the dial indicator 6 is fixed in the corresponding horizontal through hole. This device further includes a handle 8 for connecting to the upper end of the camshaft 404 of the test piece 4 for easy operation.
[0018] Working Principle:
[0019] During use, place the cam box assembly between the arc-shaped push plate 3 and the vertical frame 5. Start the horizontal cylinder 2 to drive the pusher to move towards the vertical frame 5 side, and use the vertical surfaces of the arc-shaped push plate 3 and the vertical frame 5 to clamp and position the outer shell 403 of the cam box assembly. The measuring heads of the three dial indicators 6 are respectively in contact with the outer peripheral surfaces of the three cams 401 inside the cam box assembly. Pull the handle 8 to drive the camshaft 404 to rotate, thereby driving the three cams 401 to rotate synchronously, generating a lift stroke, which in turn pushes the measuring heads of the dial indicators 6 to generate displacements, and indication data appears on the dials of the dial indicators 6, realizing the stroke measurement work of the cams 401.
[0020] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiments of the present invention and cannot be considered as defining the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention shall still fall within the scope covered by this patent.
Claims
1. A device for measuring the cam stroke of a railway locomotive valve, comprising a bottom plate and a dial indicator, characterized in that: On one side of the upper surface of the bottom plate, there is a support, and a horizontal cylinder is arranged on the support. The end of the cylinder rod of the horizontal cylinder is provided with a pusher, and the front end of the pusher is provided with an arc-shaped push plate. On the other side of the upper surface of the bottom plate, there is a vertical frame corresponding to the arc-shaped push plate. The vertical frame has a vertical surface that is closely connected to the flange end face of the workpiece to be measured. The number of dial indicators is three, and the three dial indicators are fixedly spaced along the height direction of the vertical frame. The measuring heads of the dial indicators pass through the vertical surface and point to the cam of the workpiece to be measured.
2. The measuring cam travel device for railway locomotive valves according to claim 1, characterized in that: The vertical frame is provided with a plurality of horizontal through holes at intervals from top to bottom. The center line of the horizontal through holes is parallel to the center line of the horizontal cylinder, and the center line of the horizontal cylinder and the center lines of the respective horizontal through holes are located in the same vertical plane. The shaft tube of the dial indicator is fixed in the corresponding horizontal through hole.
3. The measuring cam stroke device for railway locomotive valves according to claim 1, characterized in that: It further includes a handle for connecting to the upper end of the camshaft of the workpiece to be measured.
4. The measuring device for the cam stroke of a railway locomotive valve according to claim 1, characterized in that: The arc center line of the arc-shaped push plate is perpendicular to the horizontal plane.