Chain wheel radial run-out detection tool

Abstract

The utility model discloses a radial run-out detection tool for a chain wheel. The radial run-out detection tool comprises a fixing mechanism and a measuring column mechanism, the fixing mechanism comprises a support and a fixing shaft, a liftable dial indicator is arranged on the support, and the fixing shaft is arranged on the support; the measuring column mechanism comprises a limiting disc, a measuring column, a sliding column and a guide ring, the limiting disc is rotatably arranged on the support, a plurality of sliding grooves formed in the radial direction are formed in the limiting disc in the circumferential direction, the measuring column and the sliding column are both in sliding connection with the sliding grooves and are connected through springs, a threaded sleeve is further arranged on the limiting disc in the circumferential direction, and the threaded sleeve is sleeved with the guide ring. The outer wall of the guide ring is in threaded connection with the threaded sleeve, a plurality of guide walls are arranged on the inner wall of the guide ring in the circumferential direction, the guide walls are gradually thickened in the circumferential direction of the guide ring, and the sliding columns abut against the guide walls. By using the radial run-out detection tool for the chain wheel, the plurality of measuring columns can be placed in the tooth groove of the chain wheel to abut against each other, so that a plurality of point positions can be rapidly measured, the operation is convenient and simple, and the detection efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sprocket detection, in particular to a sprocket radial runout detection tool. Background Art

[0002] The sprocket is the main component of the chain drive, and its processing accuracy directly affects the working performance of the chain drive. Radial runout is one of the main indicators for evaluating the processing accuracy of the sprocket, which directly affects the dynamic characteristics of the chain drive. Therefore, measuring the radial runout of the sprocket is an important prerequisite for ensuring the performance of the sprocket drive.

[0003] In the prior art, the radial runout detection of the sprocket is to put the measuring rod into the tooth groove of the sprocket and close to the tooth root circle, put the needle of the dial indicator on the measuring rod to get the reading, and rotate the sprocket to repeat the above operation. Finally, the difference in the values ​​of each measuring point is the radial runout of the tooth root circle of the sprocket. This method requires the operator to repeatedly put the measuring rod into each tooth groove for detection, resulting in low detection efficiency, and the long-term repetition of the operator will also affect the detection quality. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model proposes a sprocket radial runout detection tool, which can improve the detection efficiency.

[0005] In order to achieve the above-mentioned object, the utility model is realized by the following technical scheme: a sprocket radial runout detection tool, including a fixing mechanism and a measuring column mechanism;

[0006] The fixing mechanism comprises a bracket and a fixing shaft, the bracket is provided with a dial indicator which can be raised and lowered, and the fixing shaft is arranged on the bracket;

[0007] The measuring column mechanism includes a limit plate, a measuring column, a sliding column and a guide ring. The limit plate is rotatably arranged on the bracket and is provided with a plurality of radially arranged sliding grooves around the circumference. The measuring column and the sliding column are both slidably connected to the sliding grooves and are connected to each other through a spring. A threaded sleeve is also provided around the circumference of the limit plate. The outer wall of the guide ring is threadedly connected to the threaded sleeve, and a plurality of guide walls are provided around the circumference of the inner wall. The guide walls gradually become thicker along the circumferential direction of the guide ring, and the sliding column abuts against the guide walls.

[0008] First, put the sprocket on the fixed shaft, then rotate the guide ring to make the gradually thickened part of the guide wall contact the sliding column, push the sliding column and the measuring column to move in the sliding groove, move toward the center, until the measuring column is put into the tooth groove of the sprocket. Under the action of the spring, the measuring column is pressed against the tooth groove. The guide ring and the threaded sleeve are connected by threads to keep the measuring column pressed against. Lower the dial indicator so that the ejector pin is pressed against the measuring column for measurement, and then rotate the limit plate to drive the sprocket to rotate on the fixed shaft, so as to measure multiple measuring columns.

[0009] The beneficial effect of the above-mentioned sprocket radial runout detection tool is that multiple measuring pins can be placed and tightened in the sprocket tooth grooves, so that multiple points can be measured quickly, and the operation is convenient and simple, which greatly improves the detection efficiency.

[0010] Furthermore, the fixing mechanism also includes a screw rod and a lifting seat, the screw rod is fixedly arranged on the bracket, the lifting seat is threadedly connected to the screw rod, and the dial indicator is rotatably arranged on the lifting seat.

[0011] During testing, the dial indicator can be adjusted to a suitable height by rotating the lifting seat, and the dial indicator is rotated relative to the lifting seat so that the ejector pin can be pressed against the measuring column.

[0012] Furthermore, the lifting seat and the threaded sleeve are both provided with threaded through holes, and threaded locking bolts are provided in the threaded through holes.

[0013] The lifting seat can be locked relative to the screw rod or the guide ring can be locked relative to the threaded sleeve by turning the locking bolt to ensure that the height of the dial indicator will not change and the guide ring will not rotate relatively when the limit plate is turned.

[0014] Furthermore, the measuring column mechanism also includes a motor, which is fixedly arranged and connected to the limiting plate, and can drive the limiting plate to rotate.

[0015] By driving the limit plate to rotate through a motor, the operator's workload can be further reduced, and the operator only needs to record the dial indicator reading.

[0016] Furthermore, the bracket is provided with a threaded column, and the fixed shaft is provided with a threaded hole which is threadedly connected to the threaded column.

[0017] The fixed shaft is detachably connected to the bracket, so that the fixed shaft can be easily replaced and is used to adapt the corresponding fixed shaft to different sprockets. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation of the utility model, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0019] Figure 1 A front view of a sprocket radial runout detection tool provided by an embodiment of the utility model;

[0020] Figure 2 for Figure 1 A side view of a sprocket radial runout detection tool is shown;

[0021] Reference numerals:

[0022] 1-sprocket, 2-dial indicator;

[0023] 10-fixing mechanism, 11-bracket, 12-fixing shaft, 13-screw, 14-lifting seat, 15-locking bolt, 16-motor, 17-threaded column;

[0024] 20-measuring column mechanism, 21-limiting plate, 211-sliding groove, 212-threaded sleeve, 22-measuring column, 221-spring, 23-sliding column, 24-guide ring, 241-guide wall. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0026] See also Figure 1 and Figure 2 The utility model provides a sprocket radial runout detection tool, including a fixing mechanism 10 and a measuring column mechanism 20. The sprocket is placed on the fixing mechanism 10, and a measuring column 22 is placed into a tooth groove of the sprocket through the measuring column mechanism 20 for measurement.

[0027] Specifically, the fixing mechanism 10 includes a bracket 11 and a fixed shaft 12. The bracket 11 is provided with a dial indicator 2 that can be raised and lowered. The fixed shaft 12 is provided on the bracket 11. The measuring column mechanism 20 includes a limit plate 21, a measuring column 22, a sliding column 23 and a guide ring 24. The limit plate 21 is rotatably provided on the bracket 11, sleeved on the outside of the fixed shaft 12, and is concentric with the fixed shaft 12. The limit plate 21 is provided with a plurality of radially arranged sliding grooves 211 around the circumference, and the measuring column 22 and the sliding column 23 are slidably connected in the sliding grooves 211 ( Figure 1 For the sake of convenience, the slide column is not shown in the figure. The slide column is shorter than the measuring column to avoid blocking the dial indicator. The measuring column 22 and the slide column 23 are connected to each other through a spring 221. The limit plate 21 is also provided with a threaded sleeve 212 around the circumference. The outer wall of the guide ring 24 is threadedly connected to the inner wall of the threaded sleeve 212. The inner wall is provided with a plurality of guide walls 241 around the circumference. The guide walls 241 gradually become thicker along the circumferential direction of the guide ring 24. The slide column 23 abuts against the guide walls 241. In order to facilitate the rotation of the guide ring 24, a handle for holding is provided on the ring surface.

[0028] During the inspection, the sprocket 1 is first placed on the fixed shaft 12, and then the guide ring 24 is rotated so that the gradually thickened part of the guide wall 241 pushes the sliding column 23 and the measuring column 22 to move in the sliding groove 211, and moves toward the center of the circle until the measuring column 22 is placed in the tooth groove of the sprocket 1. The measuring column 22 is pressed against the tooth groove under the action of the spring 221, and the guide ring 24 is connected to the threaded sleeve 212 through a thread, which can keep the measuring column 22 pressed against the tooth groove. Then the dial indicator 2 is lowered so that the ejector pin is pressed against the measuring column 22 for measurement, and the limit plate 21 is rotated to drive the sprocket 1 to rotate on the fixed shaft 12, so as to measure multiple measuring columns and obtain readings at multiple points. Finally, after the readings of all points of the sprocket are obtained, the difference between the maximum and minimum values ​​is the radial runout value of the sprocket.

[0029] Specifically, the fixing mechanism 10 further includes a screw rod 13 and a lifting seat 14, the screw rod 13 is fixedly arranged on the bracket 11, the lifting seat 14 is threadedly connected to the screw rod 13, and the dial indicator 2 is rotatably arranged on the lifting seat 14. During the inspection, the dial indicator 2 can be adjusted to a suitable height by rotating the lifting seat 14, and then the dial indicator 2 is rotated relative to the lifting seat 14 so that the ejector pin can be pushed against the measuring column 22 for measurement.

[0030] In this embodiment, the lifting seat 14 and the threaded sleeve 212 are both provided with threaded through holes, and the threaded through holes are provided with threaded locking bolts 15. By screwing the locking bolts 15, the lifting seat 14 can be locked relative to the screw rod 13, or the guide ring 24 can be locked relative to the threaded sleeve 212, so as to ensure that the height of the dial indicator 2 does not change, and the guide ring 24 does not rotate relatively when the limit plate 21 is rotated.

[0031] Specifically, the measuring column mechanism 20 also includes a motor 16, which is fixedly mounted on the frame and is connected to the limit plate 21 through a gear set. In this embodiment, the motor 16 is connected to a gear, and a gear ring is disposed outside the limit plate 21, and the gear and the gear ring are meshed. The motor 16 can drive the limit plate 21 to rotate, so as to further reduce the workload of the operator, and the operator only needs to record the dial indicator reading.

[0032] Specifically, the bracket 11 is further provided with a threaded column 17, and the fixed shaft 12 is provided with a threaded hole and is threadedly connected with the threaded column 17. The fixed shaft 12 is detachably connected to the bracket 11, which can facilitate the replacement of the fixed shaft 12 and is used to install a fixed shaft 12 of corresponding size for different sprockets.

[0033] The working principle of the above-mentioned sprocket radial runout detection tool is: put the sprocket 1 on the fixed shaft 12, then rotate the guide ring 24 to make the guide wall 241 push the sliding column 23 and the measuring column 22 to move in the sliding groove 211, move toward the center of the circle, until the measuring column 22 is put into the tooth groove of the sprocket 1, and the measuring column 22 is pressed against the tooth groove under the action of the spring 221. Then rotate the lifting seat 14 to lower the dial indicator 2, so that the ejector pin is pressed against the measuring column 22 for measurement, and rotate the limit plate 21 to drive the sprocket 1 to rotate on the fixed shaft 12, so as to measure multiple measuring columns 22.

[0034] By using the above-mentioned sprocket radial runout detection tool, multiple measuring pins can be placed together in the tooth grooves of the sprocket and tightened, so that multiple points can be measured quickly, and the operation is convenient and simple, thereby greatly improving the detection efficiency.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A sprocket radial runout detection tool, characterized in that: It includes a fixing mechanism and a measuring column mechanism; The fixing mechanism comprises a bracket and a fixing shaft, the bracket is provided with a dial indicator which can be raised and lowered, and the fixing shaft is on the bracket; The measuring column mechanism includes a limit plate, a measuring column, a sliding column and a guide ring. The limit plate is rotatably arranged on the bracket and is provided with a plurality of radially arranged sliding grooves around the circumference. The measuring column and the sliding column are both slidably connected to the sliding grooves and are connected to each other through a spring. A threaded sleeve is also provided around the circumference of the limit plate. The outer wall of the guide ring is threadedly connected to the threaded sleeve, and a plurality of guide walls are provided around the circumference of the inner wall. The guide walls gradually become thicker along the circumferential direction of the guide ring, and the sliding column abuts against the guide walls.

2. The sprocket radial runout detection tool according to claim 1, characterized in that: The fixing mechanism also includes a screw rod and a lifting seat. The screw rod is fixedly arranged on the bracket. The lifting seat is threadedly connected with the screw rod. The dial indicator is rotatably arranged on the lifting seat.

3. The sprocket radial runout detection tool according to claim 2, characterized in that: The lifting seat and the threaded sleeve are both provided with threaded through holes, and threaded locking bolts are arranged in the threaded through holes.

4. The sprocket radial runout detection tool according to claim 1, characterized in that: The measuring column mechanism also includes a motor, which is fixedly arranged and connected to the limiting plate, and can drive the limiting plate to rotate.

5. The sprocket radial runout detection tool according to claim 1, characterized in that: The bracket is provided with a threaded column, and the fixed shaft is provided with a threaded hole which is threadedly connected with the threaded column.

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