Disc cam contour measuring device

Abstract

The invention relates to the technical field of disc cam measurement, and discloses a disc cam contour measuring device, which comprises a base, and is characterized in that the top of the base is provided with a cam driving mechanism, and the cam driving mechanism is used for positioning and rotationally driving a cam; the cam driving mechanism comprises a connecting base, a center protruding block is fixedly connected to the top of the connecting base, a threaded hole is formed in the top of the center protruding block, and a threaded cover is connected to the inner wall of the threaded hole in a threaded mode. Through the design of the cam driving mechanism, the cam is inserted into the outer wall of the central convex block, then the threaded cover is rotationally connected to the top of the central convex block, and at the moment, the supporting legs abut against the top of the cam, so that the function of positioning the cam is achieved, and the scheme abandons a complex mechanical mechanism of a traditional high-precision centering clamp; rapid clamping and accurate positioning are achieved only through simple machinery, the manufacturing cost and the maintenance difficulty are remarkably reduced, actual use and operation are simple, and practical operation of workers is facilitated.

Description

Technical Field

[0001] This invention relates to the field of disc cam measurement technology, specifically to a disc cam profile measuring device. Background Technology

[0002] Disc cams are a common type of mechanical transmission element. Through the contact between their radial profile curve and the follower, they convert the rotational motion of the cam into the linear or intermittent motion of the push rod. They are characterized by their compact structure and precise and controllable motion, and are widely used in fields such as automated equipment, packaging machinery, and pharmaceutical production lines.

[0003] The disc cam profile measuring device drives the cam to rotate at a constant speed via a stepper motor. It works in conjunction with a laser triangulation instrument to perform continuous non-contact scanning of the cam profile, collects three-dimensional point cloud data in real time, and reconstructs the complete profile curve using software. It also analyzes parameters such as displacement, curvature, and profile degree to ensure that the motion law is highly consistent with the design curve. It is widely used in precision machinery manufacturing, automated production lines, and scientific research quality control.

[0004] In actual operation, to ensure the high accuracy and repeatability of laser scanning data, the cam profile measuring device must be stably and coaxially fixed. The current mainstream solutions generally adopt special centering fixtures with complex structures, such as radial adaptive clamping systems based on disc cam-spring linkage mechanisms, or eccentric locking devices with high-precision mandrels and elastic pressure plates. The manufacturing and assembly process involves multi-level centering calibration and preload adjustment, which is not only time-consuming and requires high technical skills from operators, but also the fixture body is highly customized and difficult to replace and adapt, resulting in a significant increase in the overall equipment investment and maintenance costs. Summary of the Invention

[0005] The purpose of this invention is to provide a disc cam profile measuring device, which solves the problem that cam clamps in the prior art cause a significant increase in the overall equipment investment and maintenance costs.

[0006] The present invention provides the following technical solution: a disc cam profile measuring device, including a base, and a cam drive mechanism is provided on the top of the base, the cam drive mechanism being used to position and rotate the cam; The cam drive mechanism includes a connecting seat, a central protrusion is fixedly connected to the top of the connecting seat, a threaded hole is opened on the top of the central protrusion, a threaded cap is threadedly connected to the inner wall of the threaded hole, a support leg is fixedly connected to the outer wall of the threaded cap, and a protrusion is fixedly connected to the bottom of the support leg.

[0007] The cam is inserted into the outer wall of the central protrusion, and then the threaded cap is rotated and connected to the top of the central protrusion. At this time, the support leg will abut against the top of the cam, thus realizing the function of positioning the cam. The operation is simple, easy to understand, and low in cost.

[0008] As a preferred embodiment of the above technical solution, a cross-shaped rotating handle is fixedly connected to the top of the threaded cap, and a rubber sleeve is fixedly fitted onto the outer wall of the cross-shaped rotating handle.

[0009] The design of the cross-shaped handle and rubber sleeve makes it easy for users to rotate the threaded cap.

[0010] As a preferred embodiment of the above technical solution, the cam drive mechanism further includes a support leg, which is fixedly mounted on the top of the base. A circular seat is fixedly mounted on the top of the support leg, and a rotating platform is rotatably connected to the top of the circular seat. A stepper motor is fixedly mounted on the bottom of the circular seat, and the output shaft of the stepper motor is fixedly connected to the bottom of the rotating platform.

[0011] The design of the stepper motor and rotary table allows the cam to rotate, facilitating contour measurement.

[0012] As a preferred embodiment of the above technical solution, the top of the rotating platform is provided with a groove, and a plug is movably inserted into the inner cavity of the groove. The plug is fixedly installed on the outer wall of the connecting seat.

[0013] The design of the grooves and inserts makes the connector completely replaceable.

[0014] As a preferred embodiment of the above technical solution, a measuring mechanism is provided on the top of the base. The measuring mechanism includes a bottom frame, which is fixedly installed on the top of the base. A horizontal rail is fixedly installed between the two sides of the inner wall of the bottom frame. A sliding seat is slidably connected to the outer wall of the horizontal rail, and a lifting frame is fixedly installed on the top of the sliding seat.

[0015] The lateral position of the laser measuring instrument can be adjusted by using a horizontal track and sliding seat design.

[0016] As a preferred embodiment of the above technical solution, a square base one is fixedly installed on the top of the lifting frame, a vertical pole is fixedly installed on the top of the square base one, a square base two is fixedly installed on the top of the vertical pole, a lead screw is rotatably connected between the square base one and the square base two, a lifting seat is provided on the outer wall of the vertical pole and the lead screw, and a laser measuring instrument is detachably connected to the side of the lifting seat.

[0017] The height of the laser measuring instrument can be adjusted by designing square base one, square base two, upright rod, and lead screw.

[0018] As a preferred embodiment of the above technical solution, a rotating wheel is fixedly connected to the top of the lead screw, a U-shaped rod is slidably connected to the inner wall of the rotating wheel, a pressure plate is fixedly installed at the bottom of the U-shaped rod, an elastic element is fixedly installed between the rotating wheel and the pressure plate, and a rubber strip is fixedly connected to the bottom of the pressure plate.

[0019] The angle of the rotating wheel can be temporarily locked by using a U-shaped rod, pressure plate, and elastic element.

[0020] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes a cam-driven mechanism to insert a cam onto the outer wall of a central protrusion, and then rotates a threaded cap onto the top of the central protrusion. At this point, the support leg abuts against the top of the cam, thus achieving the function of positioning the cam. This solution eliminates the complex mechanical mechanisms of traditional high-precision centering fixtures, relying solely on simple mechanics to achieve rapid clamping and precise positioning, significantly reducing manufacturing costs and maintenance difficulty. In actual use, it is simple to operate and convenient for workers to practice. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the cam drive mechanism of the present invention; Figure 3 This is a schematic diagram of the connection structure between the rotating platform and the connecting seat of the present invention; Figure 4 This is a schematic diagram of the threaded cap structure of the present invention; Figure 5 This is a schematic diagram of the structure of the sliding seat of the present invention; Figure 6 This is a schematic diagram of the lifting seat of the present invention; Figure 7 This is a schematic diagram of the structure of the rotor of the present invention.

[0022] In the diagram: 1. Base; 2. Cam drive mechanism; 21. Support leg; 22. Circular seat; 23. Rotary table; 24. Stepper motor; 25. Groove; 26. Insert block; 27. Connecting seat; 271. Central protrusion; 272. Threaded hole; 273. Threaded cap; 274. Support leg; 275. Protrusion; 276. Cross handle; 277. Rubber sleeve; 3. Measuring mechanism; 31. Base frame; 32. Horizontal rail; 33. Sliding seat; 34. Lifting frame; 35. Square seat one; 36. Upright pole; 37. Square seat two; 38. Lead screw; 381. Rotary wheel; 382. U-shaped rod; 383. Elastic element; 384. Pressure plate; 385. Rubber strip; 39. Lifting seat; 391. Laser measuring instrument. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0024] like Figures 1-7 As shown, the present invention provides a technical solution: a disc cam profile measuring device, including a base 1, and a cam drive mechanism 2 is provided on the top of the base 1. The cam drive mechanism 2 is used to position and rotate the cam. The cam drive mechanism 2 includes a connecting seat 27. A central protrusion 271 is fixedly connected to the top of the connecting seat 27. A threaded hole 272 is opened on the top of the central protrusion 271. A threaded cover 273 is threadedly connected to the inner wall of the threaded hole 272. A support leg 274 is fixedly connected to the outer wall of the threaded cover 273. A protrusion 275 is fixedly connected to the bottom of the support leg 274. The cam is inserted into the outer wall of the central protrusion 271, and then the threaded cover 273 is rotated and connected to the top of the central protrusion 271. At this time, the support leg 274 will abut against the top of the cam, thus realizing the function of positioning the cam. The design of the protrusion 275 improves the effect of the support leg 274 in pressing and securing the cam.

[0025] As one implementation method in this embodiment, such as Figure 4 As shown, a cross handle 276 is fixedly connected to the top of the threaded cover 273, and a rubber sleeve 277 is fixedly fitted on the outer wall of the cross handle 276. The design of the cross handle 276 makes it convenient for users to rotate the threaded cover 273, and the design of the rubber sleeve 277 improves the comfort of users when rotating.

[0026] As one implementation method in this embodiment, such as Figure 2 As shown, the cam drive mechanism 2 also includes a support leg 21, which is fixedly installed on the top of the base 1. A circular seat 22 is fixedly installed on the top of the support leg 21. A rotating platform 23 is rotatably connected to the top of the circular seat 22. A stepper motor 24 is fixedly installed at the bottom of the circular seat 22. The output shaft of the stepper motor 24 is fixedly connected to the bottom of the rotating platform 23. After the cam is loaded, the stepper motor 24 is controlled to work, which can drive the rotating platform 23 to rotate, thereby driving the connecting seat 27 and the entire cam to rotate, so as to facilitate the contour measurement work.

[0027] As one implementation method in this embodiment, such as Figure 3 As shown, the top of the rotating table 23 has a groove 25, and a plug 26 is movably inserted into the inner cavity of the groove 25. The plug 26 is fixedly installed on the outer wall of the connecting seat 27. The outer diameter of the central protrusion 271 is adapted to the cam hole. When measuring cams of different sizes, the connecting seat 27 and the central protrusion 271 need to be replaced as a whole. When replacing, the bolts on the outer wall of the rotating table 23 can be loosened to operate.

[0028] As one implementation method in this embodiment, such as Figure 5 As shown, a measuring mechanism 3 is provided on the top of the base 1. The measuring mechanism 3 includes a bottom frame 31, which is fixedly installed on the top of the base 1. A horizontal rail 32 is fixedly installed between the two sides of the inner wall of the bottom frame 31. A sliding seat 33 is slidably connected to the outer wall of the horizontal rail 32. A lifting frame 34 is fixedly installed on the top of the sliding seat 33. During the debugging process, the user can adjust the distance from the laser measuring instrument 391 to the cam by loosening the bolts on the outer wall of the sliding seat 33 and then sliding the sliding seat 33 on the outer wall of the horizontal rail 32. The outer wall of the horizontal rail 32 is coated with scale lines to facilitate user positioning.

[0029] As one implementation method in this embodiment, such as Figure 6 As shown, a square base 35 is fixedly installed on the top of the lifting frame 34. A vertical pole 36 is fixedly installed on the top of the square base 35. A square base 37 is fixedly installed on the top of the vertical pole 36. A lead screw 38 is rotatably connected between the square base 35 and the square base 37. A lifting seat 39 is provided on the outer wall of the vertical pole 36 and the lead screw 38. A laser measuring instrument 391 is detachably connected to the side of the lifting seat 39. During the debugging process, the user can adjust the height of the laser measuring instrument 391 and rotate the lead screw 38 to drive the lifting seat 39 to slide vertically on the outer wall of the vertical pole 36, thus realizing the function of adjusting the height of the laser measuring instrument 391. The outer wall of the vertical pole 36 is coated with scale lines for easy positioning by the user. It is worth noting that this... The stepper motor 24 and laser measuring instrument 391 mentioned in this case are commercially available devices that can be purchased by those skilled in the art. No structural modifications have been made to these devices in this paper. Therefore, those skilled in the art are familiar with their working principles based on their professional knowledge and can apply them proficiently. Thus, this paper will not elaborate further on them. Furthermore, this solution aims to protect the physical structure, not the circuitry or software control. The mention of the processing circuit in this paper is merely a supplementary explanation of the feasibility and authenticity of this invention. This invention does not seek protection for the algorithm and circuitry technology. It is worth emphasizing that although this solution does not elaborate on the electronic control program, those skilled in the art can be familiar with and apply it based on their professional knowledge.

[0030] As one implementation method in this embodiment, such as Figure 7As shown, a rotating wheel 381 is fixedly connected to the top of the lead screw 38. A U-shaped rod 382 is slidably connected to the inner wall of the rotating wheel 381. A pressure plate 384 is fixedly installed at the bottom of the U-shaped rod 382. An elastic element 383 is fixedly installed between the rotating wheel 381 and the pressure plate 384. A rubber strip 385 is fixedly connected to the bottom of the pressure plate 384. The user can rotate the lead screw 38 from the rotating wheel 381. In the initial state, the elastic force of the elastic element 383 can cause the pressure plate 384 to abut against the top of the square seat 37, so that the rotating wheel 381 cannot rotate, thus maintaining the height of the laser measuring instrument 391. When rotating the rotating wheel 381, the pressure plate 384 can be pulled up from the U-shaped rod 382.

[0031] Working principle: In use, the cam is inserted into the outer wall of the central protrusion 271, and then the threaded cover 273 is rotated and connected to the top of the central protrusion 271. At this time, the support leg 274 will abut against the top of the cam, thus realizing the function of positioning the cam. The stepper motor 24 is controlled to work, which can drive the rotating table 23 to rotate, thereby driving the connecting seat 27 and the entire cam to rotate. At the same time, through the work of the laser measuring instrument 391, the cam contour is continuously scanned non-contactly, and three-dimensional point cloud data is collected in real time, thus realizing the function of contour measurement.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A disc cam profile measuring device, characterized in that: Includes a base (1), and a cam drive mechanism (2) is provided on the top of the base (1). The cam drive mechanism (2) is used to position and rotate the cam. The cam drive mechanism (2) includes a connecting seat (27), a central protrusion (271) is fixedly connected to the top of the connecting seat (27), a threaded hole (272) is opened on the top of the central protrusion (271), a threaded cover (273) is threadedly connected to the inner wall of the threaded hole (272), a support leg (274) is fixedly connected to the outer wall of the threaded cover (273), and a protrusion (275) is fixedly connected to the bottom of the support leg (274).

2. The disc cam profile measuring device according to claim 1, characterized in that: The top of the threaded cap (273) is fixedly connected to a cross handle (276), and a rubber sleeve (277) is fixedly fitted on the outer wall of the cross handle (276).

3. The disc cam profile measuring device according to claim 1, characterized in that: The cam drive mechanism (2) further includes a support leg (21), which is fixedly installed on the top of the base (1). A circular seat (22) is fixedly installed on the top of the support leg (21). A rotating platform (23) is rotatably connected to the top of the circular seat (22). A stepper motor (24) is fixedly installed at the bottom of the circular seat (22). The output shaft of the stepper motor (24) is fixedly connected to the bottom of the rotating platform (23).

4. The disc cam profile measuring device according to claim 3, characterized in that: The top of the rotating platform (23) is provided with a groove (25), and a plug (26) is movably inserted into the inner cavity of the groove (25). The plug (26) is fixedly installed on the outer wall of the connecting seat (27).

5. The disc cam profile measuring device according to claim 1, characterized in that: A measuring mechanism (3) is provided on the top of the base (1). The measuring mechanism (3) includes a bottom frame (31). The bottom frame (31) is fixedly installed on the top of the base (1). A horizontal rail (32) is fixedly installed between the two sides of the inner wall of the bottom frame (31). A sliding seat (33) is slidably connected to the outer wall of the horizontal rail (32). A lifting frame (34) is fixedly installed on the top of the sliding seat (33).

6. The disc cam profile measuring device according to claim 5, characterized in that: A square seat (35) is fixedly installed on the top of the lifting frame (34). A vertical pole (36) is fixedly installed on the top of the square seat (35). A square seat (37) is fixedly installed on the top of the vertical pole (36). A lead screw (38) is rotatably connected between the square seat (35) and the square seat (37). A lifting seat (39) is provided on the outer wall of the vertical pole (36) and the lead screw (38). A laser measuring instrument (391) is detachably connected to the side of the lifting seat (39).

7. The disc cam profile measuring device according to claim 6, characterized in that: A rotating wheel (381) is fixedly connected to the top of the lead screw (38), a U-shaped rod (382) is slidably connected to the inner wall of the rotating wheel (381), a pressure plate (384) is fixedly installed at the bottom of the U-shaped rod (382), an elastic element (383) is fixedly installed between the rotating wheel (381) and the pressure plate (384), and a rubber strip (385) is fixedly connected to the bottom of the pressure plate (384).

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