Gauge for roller path of cam

Abstract

The utility model discloses a checking fixture for a roller path of a cam, which comprises a machine table, a rotatable mounting seat is arranged on the machine table, the mounting seat is connected with the cam, a checking fixture unit is arranged on the machine table and positioned on one side of the mounting seat, and the checking fixture unit comprises a detection bearing positioned in the roller path of the cam. The detection bearing is installed on a connecting rod capable of rotating in the circumferential direction, and the cam rotates to enable the detection bearing to roll in a roller path. Through the above mode, the detection tool for the roller path of the cam detects whether the roller path of the cam is qualified or not through simulating the working state of the cam, is simple in operation, short in time consumption and high in detection precision, and can ensure that a clamping stagnation phenomenon does not occur during later assembly and use.

Description

Technical Field

[0001] The utility model relates to the field of detection devices, in particular to a jig for the raceway of a cam used in a grass rake. Background Art

[0002] When the grass rake is actually working, 14 grass raking rods are assembled in the cam raceway. In order to ensure that the rods can roll smoothly in the raceway after assembly, 100% dimensional inspection of the cam raceway is required.

[0003] The existing detection method is to inspect the dimensions of the cam raceway by 3D scanning. It is necessary to stick matte marking points on the cam surface first and scan the cam. After the scanning is completed, click on the raceway with the mouse for comparison. The existing detection method is cumbersome to operate, time-consuming, and the matte marking points on the casting surface need to be removed after inspection. The whole process takes about half an hour, only 20 pieces can be inspected in one shift, and the detection result is greatly affected by fitting, and the detection result cannot fully guarantee the inspection correctness.

[0004] Using the existing inspection method for the cam raceway, the inspection efficiency is low and the inspection accuracy is low, which cannot meet the customer's delivery requirements. Summary of the Invention

[0005] The main technical problem to be solved by the utility model is to provide a jig for the raceway of a cam, which can detect whether the raceway of the cam is qualified by simulating the working state of the cam, is simple to operate, time-consuming short, has high inspection accuracy, and can ensure that there will be no jamming phenomenon during later assembly and use.

[0006] To solve the above technical problem, a technical solution adopted by the utility model is: to provide a jig for the raceway of a cam, including a machine table, a rotatable mounting seat is provided on the machine table, the mounting seat is connected with a cam, a jig unit is provided on the machine table on one side of the mounting seat, the jig unit includes a detection bearing located in the raceway of the cam, the detection bearing is installed on a link that can rotate circumferentially, and the cam rotates to make the detection bearing roll in the raceway.

[0007] In a preferred embodiment of the utility model, the raceway is an arc-shaped raceway with a height difference in the vertical space.

[0008] In a preferred embodiment of the utility model, the detection bearing rolls in the raceway and swings back and forth circumferentially.

[0009] In a preferred embodiment of the utility model, the rear end of the link is connected to a turntable, the turntable is rotatably connected in a support, and the link swings back and forth following the detection bearing.

[0010] In a preferred embodiment of the present utility model, a movable positioning rod is provided on the support, and a positioning hole cooperating with the positioning rod is provided on the turntable.

[0011] In a preferred embodiment of the present utility model, the support is slidably connected to the guide rail, and the movement of the support causes the cam to enter or leave the raceway.

[0012] In a preferred embodiment of the present utility model, a limit block is provided on the machine table at the front end of the support.

[0013] In a preferred embodiment of the present utility model, a cylinder is connected to the lower end of the support, the rear end of the cylinder is connected to the rotating block, and the rear end of the rotating block is connected to the operating handle.

[0014] In a preferred embodiment of the present utility model, a keyway cooperating with the cam is provided on the mounting seat, and a nut for pressing the cam is threadedly connected to the top of the mounting seat.

[0015] In a preferred embodiment of the present utility model, the mounting seat is rotatably connected to the machine table through a bearing.

[0016] The beneficial effects of the present utility model are as follows: The inspection tool for the raceway of the cam of the present utility model, through the cooperation of the detection shaft bearing and the roller raceway, simulates the actual working conditions of the cam by the rotation of the cam. If the detection shaft bearing rotates smoothly in the raceway, it indicates that the raceway is qualified. The inspection accuracy is high, and it will not cause waste due to secondary disassembly and assembly because of the unqualified size of the cam raceway after assembly.

[0017] For the inspection tool of the raceway of the cam of the present utility model, the detection shaft bearing can rotate in the raceway and can swing following the change of the raceway position, ensuring that the detection bearing can fit the raceway for detection, improving the detection effect and detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0019] Figure 1 is a schematic three-dimensional structure diagram of the inspection tool for the raceway of the cam of the present utility model;

[0020] Figure 2 is Figure 1 a sectional view of

[0021] Figure 3 is Figure 1 a sectional view of

[0022] Figure 4 It is a top view of a jig without a mounted cam;

[0023] The markings of each component in the attached drawings are as follows: 1. Machine table, 2. Mounting base, 3. Cam, 4. Nut, 5. Guide rail, 6. Support, 7. Turntable, 8. Connecting rod, 9. Detection bearing, 10. Positioning rod, 11. Positioning hole, 12. Cylinder, 13. Rotating block, 14. Operating handle. Specific embodiments

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below. The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope in which the present invention can be implemented.

[0025] Please refer to Figures 1 to 4 , a jig for the raceway of a cam, including a machine table 1. A rotatable mounting base 2 is provided on the machine table 1. The mounting base 2 is rotatably connected to the machine table 1 through a bearing, and the mounting base 2 can rotate freely. The mounting base 2 is connected with a cam 3. A keyway for cooperating with the cam 3 is provided on the mounting base 2. A nut 4 for pressing the cam 3 is threadedly connected to the top of the mounting base 2. When installing the cam, the cam 3 is fitted with the keyway, and then the nut 4 is screwed in to fix the cam 3 to the mounting base 2. At this time, the cam 3 can rotate following the mounting base 2, that is, the installation of the cam 3 is completed.

[0026] The machine 1 is provided with a check fixture unit located on one side of the mounting seat 2, and the check fixture unit includes a guide rail 5 arranged on the machine 1. A support 6 is movably connected to the guide rail 5, and the support 6 can move forward and backward along the guide rail 5 to allow the cam 3 to enter or leave the raceway. A turntable 7 is rotatably connected to the support 6, and a connecting rod 8 is connected to the turntable 7. The end of the connecting rod 8 away from the turntable 7 is connected to a detection bearing 9. The detection bearing 9 can rotate freely following the connecting rod 8 and the turntable 7. When inspection is required, the support 6 moves forward and rotates the turntable 7 to allow the detection bearing 9 to enter the raceway. When the cam 3 rotates, the detection bearing 9 can roll in the raceway. Since the raceway rolls in an arc raceway with a height difference in the vertical space, due to the height difference of the raceway, the detection bearing 9 will have a certain degree of deflection. The connecting rod 8 and the turntable 7 can ensure that the detection bearing 9 can swing back and forth in the circumferential direction, so that the detection bearing 9 always fits the raceway. If the detection bearing 9 does not get stuck during the rotation of the cam 3, it means that the raceway is qualified.

[0027] A movable positioning rod 10 is provided on the support 6, and a positioning hole 11 is provided on the rotating disk 7 to cooperate with the positioning rod 10. The positioning rod 10 is inserted into the positioning hole 11 to limit the rotation of the rotating disk 7.

[0028] A cylinder 12 is connected to the bottom of the support 6, and the rear end of the cylinder 12 is connected to the rotating block 13, and the rear end of the rotating block 13 is connected to the operating handle 14. The machine 1 is provided with a limit block 15 (not shown in the figure) at the front end of the support 6. The operating handle 14 is turned, and the operating handle 14 drives the rotating block 13 to rotate. The rotating block 13 simultaneously pushes the support 6 forward so that the detection bearing 9 enters the raceway. After the raceway enters, the operating handle 14 is continued to be turned. At this time, the cylinder 12 will push and compress, and the cylinder 12 will support the support 6 to prevent the detection bearing 9 from being pushed out during the rotation of the cam 3. The limit block, the cylinder 12, the rotating block 13 and the operating handle 14 ensure that the depth of the detection bearing 9 entering the raceway is correct, ensuring that the detection can be carried out smoothly.

[0029] Different from the prior art, the cam raceway inspection fixture of the utility model simulates the working state of the cam to detect whether the cam raceway is qualified. It is simple to operate, short in time, and high in inspection accuracy, and can ensure that there will be no jamming during later assembly and use.

[0030] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A cam raceway inspection tool, comprising a machine platform (1), wherein a rotatable mounting seat (2) is provided on the machine platform (1), wherein the mounting seat (2) is connected to a cam (3), wherein: The machine platform (1) is provided with a gauge unit located on one side of the mounting seat (2), the gauge unit comprising a detection bearing (9) located in a raceway of the cam (3), the detection bearing (9) being mounted on a connecting rod (8) that can rotate in a circumferential direction, and the rotation of the cam (3) causes the detection bearing (9) to roll in the raceway.

2. The cam raceway inspection tool according to claim 1, characterized in that: The raceway is an arc-shaped raceway with a height difference in the vertical space.

3. The cam raceway inspection tool according to claim 2, characterized in that: The detection bearing (9) rolls in the raceway and oscillates back and forth in the circumferential direction.

4. The cam raceway inspection tool according to claim 3, characterized in that: The rear end of the connecting rod is connected to a rotating disk (7), the rotating disk (7) is rotatably connected in a support (6), and the connecting rod (8) swings back and forth following the detection bearing (9).

5. The cam raceway inspection tool according to claim 4, characterized in that: The support (6) is provided with a movable positioning rod (10), and the rotating disk (7) is provided with a positioning hole (11) that cooperates with the positioning rod (10).

6. The cam raceway inspection tool according to claim 5, characterized in that: The support (6) is slidably connected to the guide rail (5), and the movement of the support (6) causes the cam (3) to enter or leave the raceway.

7. The cam raceway inspection tool according to claim 6, characterized in that: The machine platform (1) is provided with a limit block located at the front end of the support (6).

8. The cam raceway inspection tool according to claim 7, characterized in that: The lower end of the support (6) is connected to a cylinder (12), the rear end of the cylinder (12) is connected to a rotating block (13), and the rear end of the rotating block (13) is connected to an operating handle (14).

9. The cam raceway inspection tool according to claim 1, characterized in that: The mounting seat (2) is provided with a keyway that cooperates with the cam (3), and the top of the mounting seat (2) is threadedly connected with a nut (4) that presses the cam (3).

10. The cam raceway inspection tool according to claim 9, characterized in that: The mounting seat (2) is rotatably connected to the machine platform (1) via a bearing.

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