Tool for detecting flatness of annular groove

Abstract

The utility model relates to a detection tool, in order to solve the problem of conveniently detecting the flatness of a ring groove of rotary equipment, the utility model constructs a ring groove flatness detection tool, which comprises a base, a rotating shaft, a cross rod and a dial indicator mounting rod, a plurality of thread adjusting support legs are arranged on the base, and the thread adjusting support legs are arranged in a convex polygon vertex manner; the rotating shaft is rotationally arranged on the base, and the axis of the rotating shaft is approximately perpendicular to the plane where the landing points of the thread adjusting supporting legs are located; the transverse rod is arranged on the rotating shaft in a sliding mode, and the sliding direction of the transverse rod is perpendicular to the axis of the rotating shaft. The dial indicator mounting rod is fixed at the end of the cross rod. According to the utility model, the dial indicator is installed on the dial indicator installation rod, so that the flatness of the ring groove can be conveniently detected.

Description

Technical Field

[0001] The utility model relates to a detection tooling, and more specifically, to a detection tooling for detecting the flatness of a ring groove plane. Background Art

[0002] The slewing platform is a key structural part of slewing equipment such as excavators. It is generally formed by welding three parts: the machined main platform, the left platform, and the right platform. The connection between the lower frame and the upper frame of the excavator is realized through the slewing bearing mounting surface (i.e., the ring groove plane) machined on the main platform. The flatness of the bearing mounting surface has a significant impact on the performance of the whole machine. Due to welding deformation during the welding of the main platform with the left and right platforms, the average flatness of the machined slewing bearing mounting surface is relatively large. If the flatness of the slewing bearing mounting surface exceeds a certain value, it will have a significant impact on the performance of the whole machine, such as causing abnormal noise during the slewing of the whole machine.

[0003] To solve the problem of out-of-tolerance flatness of the ring groove plane of the slewing platform, in addition to taking measures from the process, such as anti-deformation and deformation prevention in each process of machining, assembling, and welding, accurate detection of the flatness of the ring groove plane is also one of the keys. Therefore, it is very necessary to design a detection tooling convenient for detecting the flatness of the ring groove plane of the slewing platform. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a detection tooling for the flatness of the ring groove of a slewing device, so as to facilitate the detection of the flatness of the ring groove plane.

[0005] The technical solution for the utility model to achieve its purpose is: a detection tooling for the flatness of a ring groove, which includes:

[0006] A base, on which a plurality of threaded adjusting legs are arranged, and the threaded adjusting legs are arranged at the vertices of a convex polygon.

[0007] A rotating shaft, which is rotatably arranged on the base, and the axis line of the rotating shaft is approximately perpendicular to the plane where the landing points of the threaded adjusting legs are located.

[0008] A cross bar, which is slidably arranged on the rotating shaft, and the sliding direction of the cross bar is perpendicular to the axis line of the rotating shaft.

[0009] A dial indicator mounting rod, which is fixed to the end of the cross bar.

[0010] In the detection tooling for the flatness of the ring groove of the utility model, the base is in a flat plate shape, and the axis line of the rotating shaft is perpendicular to the plane where the base is located.

[0011] In the detection tooling for the flatness of the ring groove of the utility model, the number of the threaded adjusting legs is three and they are arranged at the vertices of an equilateral triangle, and the projection of the axis line of the rotating shaft on the base is located at the center of the equilateral triangle formed by the three threaded adjusting legs.

[0012] In the flatness detection tooling for the annular groove of the present utility model, the threaded adjusting leg is composed of a bolt that is in threaded fit with the base.

[0013] In the flatness detection tooling for the annular groove of the present utility model, a shaft seat is arranged on the base, the lower end of the rotating shaft is rotatably connected to the shaft seat, and the cross bar is arranged at the upper end of the rotating shaft.

[0014] In the flatness detection tooling for the annular groove of the present utility model, a cross bar through hole for the cross bar to penetrate is arranged on the rotating shaft, a cross bar locking threaded hole communicating with the cross bar through hole is arranged on the top end surface of the rotating shaft, and a cross bar locking bolt with an end abutted against the cross bar is installed in the cross bar locking threaded hole.

[0015] In the flatness detection tooling for the annular groove of the present utility model, the cross bar locking bolt is coaxially arranged with the rotating shaft, and both the end surface of the cross bar locking bolt and the locking abutting surface on the cross bar for abutting against the end surface of the cross bar locking bolt are flat surfaces.

[0016] In the flatness detection tooling for the annular groove of the present utility model, at a position on the cross bar opposite to the locking abutting surface, there is a guiding plane parallel to the locking abutting surface, and on the hole wall of the cross bar through hole, there is a sliding plane matching with the guiding plane on the cross bar.

[0017] In the flatness detection tooling for the annular groove of the present utility model, a rod mounting hole with a center line parallel to the axis line of the rotating shaft is arranged at the end of the cross bar, and the dial indicator mounting rod is located in the rod mounting hole.

[0018] In the flatness detection tooling for the annular groove of the present utility model, a rod locking threaded hole communicating with the rod mounting hole is arranged on the end surface of the cross bar, and a rod locking bolt abutting against the dial indicator mounting rod is arranged in the rod locking threaded hole.

[0019] Compared with the prior art, in the present utility model, a dial indicator is installed on the dial indicator mounting rod, and the flatness of the annular groove can be detected more conveniently. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the flatness detection tooling for the annular groove of the present utility model.

[0021] Names and serial numbers of components in the figure:

[0022] Base 1, shaft seat 11, threaded adjusting leg 12, rotating shaft 2, cross bar locking bolt 21, cross bar through hole 22, cross bar 3, locking abutting surface 31, rod mounting hole 32, rod locking bolt 4. Detailed Embodiment

[0023] The following describes the specific implementation embodiments in conjunction with the accompanying drawings.

[0024] The flatness detection tooling for the annular groove is as Figure 1 shown, and it includes a base 1, a rotating shaft 2, a cross bar 3, and a dial indicator mounting rod 5.

[0025] A plurality of threaded adjusting legs 12 are provided on the base 1, and the threaded adjusting legs 12 are arranged at the vertices of a convex polygon.

[0026] The rotating shaft 2 is rotatably arranged on the base 1, and its axis is approximately perpendicular to the plane where the grounding points of the threaded adjusting legs 12 are located.

[0027] The cross bar 3 is slidably arranged on the rotating shaft 2, and its sliding direction is perpendicular to the axis of the rotating shaft 2.

[0028] The dial indicator mounting rod 5 is fixed to the end of the cross bar 3. The dial indicator mounting rod 5 is used to connect and mount a dial indicator (not shown in the figure) for detecting the flatness of the annular groove.

[0029] More specifically, the base 1 is in a flat plate shape, and the axis of the rotating shaft 2 is perpendicular to the plane where the base 1 is located. The number of the threaded adjusting legs 12 is three, and the three threaded adjusting legs 12 are arranged at the vertices of an equilateral triangle, that is, the connecting lines between the positions where the three threaded adjusting legs 12 are located form an equilateral triangle. The projection of the axis of the rotating shaft 2 on the base 1 is located at the center of the equilateral triangle. The threaded adjusting legs 12 are composed of bolts that are in threaded fit with the base 1. Since the axis of the rotating shaft 2 is perpendicular to the plane where the base 1 is located, the distances between the grounding points of the threaded adjusting legs 12 and the base may be unequal due to the need for leveling, resulting in relatively slight differences. The plane where the grounding points of the threaded adjusting legs 12 are located may not be strictly parallel to the plane where the base is located geometrically, but is close to parallel, that is, the axis of the rotating shaft 2 is approximately perpendicular to the plane where the grounding points of the threaded adjusting legs 12 are located.

[0030] Optionally, a shaft seat 11 is provided on the base 1, the lower end of the rotating shaft 2 is rotatably connected to the shaft seat 11, and the cross bar 3 is arranged at the upper end of the rotating shaft 2.

[0031] A cross bar through hole 22 for the cross bar 3 to penetrate is provided on the rotating shaft 2, a cross bar locking threaded hole communicating with the cross bar through hole 22 is provided on the top end face of the rotating shaft 2, and a cross bar locking bolt 21 with an end abutted against the cross bar 3 is installed in the cross bar locking threaded hole. The cross bar locking bolt 21 can rotate forward and backward, so as to lock the cross bar 3 or release the locking of the cross bar 3. After the locking of the cross bar is released, the cross bar can slide in the cross bar through hole 22, so as to adjust the distance between the end of the cross bar 3 and the rotating shaft 2.

[0032] The crossbar locking bolt 21 is coaxially arranged with the rotating shaft 2, and the end face of the crossbar locking bolt 21 and the locking abutting surface 31 on the crossbar 3 for abutting against the end face of the crossbar locking bolt 21 are both flat surfaces. Further, the position on the crossbar 3 opposite to the locking abutting surface 31 (the lower surface of the crossbar) is a guiding plane parallel to the locking abutting surface 31, and the wall of the crossbar through-hole 22 has a sliding plane that cooperates with the guiding plane on the crossbar 3. Through the guiding plane and the locking abutting surface 31, the crossbar 3 can be well fixed, preventing the crossbar 3 from changing its attitude (having a rotational angle offset relative to the rotating shaft) before and after sliding relative to the rotating shaft 2.

[0033] A rod mounting hole 32 with a center line parallel to the axis line of the rotating shaft 2 is provided at the end of the crossbar 3, and the dial indicator mounting rod 5 is located in the rod mounting hole 32. A rod locking threaded hole communicating with the rod mounting hole 32 is provided on the end face of the crossbar 3, and a rod locking bolt 4 abutting against the dial indicator mounting rod 5 is provided in the rod locking threaded hole. After loosening the rod locking bolt 4, the dial indicator mounting rod 5 can move up and down to adjust the height of the dial indicator.

[0034] When the ring groove flatness detection tooling detects the flatness of the ring groove, place the ring groove flatness detection tooling in the middle of the ring groove, for example, place it in the middle of the ring groove of the excavator slewing platform, adjust the position of the tooling so that the axis line of the rotating shaft 2 is at the center of the ring groove, and install a dial indicator for detecting flatness at the lower end of the dial indicator mounting rod 5. Adjust the protruding length of the crossbar 3 relative to the rotating shaft so that the measurement point is on the ring groove plane, and mark four points located on concentric circles at equidistant positions (transverse and longitudinal) on the ring groove, and mark them in clockwise order as: Point 1, Point 5, Point 9, and Point 13. Point 1 and Point 9 are usually the intersection points of the main platform center line and the ring groove, and the one closer to the front end of the main platform is Point 1. After determining the 4 positioning points, then mark the remaining 12 points in sequence, dividing the ring groove plane into 16 equal parts. After adjusting the dial indicator pointer to zero, make the initial reading of the initial pressure of the dial indicator 3.00 mm. During the leveling process of the detection tooling, by adjusting the threaded adjusting leg 12, make the reading of the dial indicator at Point 1 equal to the reading at Point 9, and the reading at Point 5 equal to the reading at Point 13. After the leveling of the detection tooling is completed, rotate the rotating shaft 2 to make the dial indicator return to the position of Point 1, and adjust the dial reading of the inside diameter dial indicator to 3.00 mm. Measure the values of each point in sequence starting from Point 1, record the measured values of each point, perform addition and subtraction calculations on the values to calculate the flatness of the platform ring groove, and determine whether the flatness of the platform ring groove meets the standard, which is the entire measurement process. Using the ring groove flatness detection tooling in this embodiment to install the dial indicator can more conveniently and accurately detect the flatness of the ring groove.

Claims

1. A ring groove flatness detection tool, characterized in that: include: A base, on which a plurality of threaded adjustment legs are arranged, and the vertices of the threaded adjustment legs are arranged in a convex polygonal manner; A rotating shaft is rotatably arranged on the base, and its axis is approximately perpendicular to the plane where the threaded adjustment legs land; A crossbar, slidably disposed on the rotating shaft, with a sliding direction perpendicular to the axis of the rotating shaft; The dial indicator mounting rod is fixed to the end of the cross bar.

2. The ring groove flatness detection tool according to claim 1, characterized in that: The base is in the shape of a flat plate, and the axis of the rotating shaft is perpendicular to the plane where the base is located.

3. The ring groove flatness detection tool according to claim 2, characterized in that: The number of the threaded adjustment legs is three and they are arranged in a triangle with vertices of an equilateral triangle. The projection of the axis of the rotating shaft on the base is located at the center of the equilateral triangle formed by the three threaded adjustment legs.

4. The ring groove flatness detection tool according to claim 2, characterized in that: The threaded adjustment leg is composed of a bolt that is threadably matched with the base.

5. The ring groove flatness detection tool according to any one of claims 1 to 4, characterized in that: The base is provided with an axle seat, the lower end of the rotating shaft is rotatably connected to the axle seat, and the cross bar is arranged at the upper end of the rotating shaft.

6. The ring groove flatness detection tool according to claim 5, characterized in that: The rotating shaft is provided with a cross bar through hole for the cross bar to be inserted therein, and the top end face of the rotating shaft is provided with a cross bar locking threaded hole which is communicated with the cross bar through hole, and a cross bar locking bolt whose end abuts against the cross bar is installed in the cross bar locking threaded hole.

7. The ring groove flatness detection tool according to claim 6, characterized in that: The cross bar locking bolt is coaxially arranged with the rotation axis, and the end face of the cross bar locking bolt and the locking abutting face on the cross bar used for abutting against the end face of the cross bar locking bolt are both planes.

8. The ring groove flatness detection tool according to claim 7, characterized in that: The position on the cross bar opposite to the locking abutment surface is a guide plane parallel to the locking abutment surface, and the hole wall of the cross bar through hole is provided with a sliding plane matching with the guide plane on the cross bar.

9. The ring groove flatness detection tool according to any one of claims 6 to 8, characterized in that: The end of the cross bar is provided with a rod mounting hole whose center line is parallel to the axis center line of the rotating shaft, and the dial indicator mounting rod is located in the rod mounting hole.

10. The ring groove flatness detection tool according to claim 9, characterized in that: The end surface of the cross bar is provided with a rod locking threaded hole which is communicated with the rod mounting hole, and the rod locking threaded hole is provided with a rod locking bolt which abuts against the dial indicator mounting rod.

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