A quick mechanism for detecting the coaxiality of a cross shaft

Abstract

This utility model discloses a rapid mechanism for detecting the coaxiality of a crosshair, relating to the field of coaxiality detection technology. It includes a worktable, with a clamping and rotating mechanism on the top of the worktable. A detection mechanism is located above the clamping and rotating mechanism. A steering mechanism is also provided on the top of the worktable for rapid detection of a 90-degree rotation of the crosshair. The steering mechanism includes a rotating unit and a positioning unit. The rotating unit, located on the top of the worktable, includes a frame fixedly installed on the top of the worktable. The rotating unit enables automatic 90-degree rotation detection of the crosshair. The rotating unit includes a frame, a rotating plate, a positioning plate, and a linkage column. Rotation of the rotating plate causes the linkage column to slide into the linkage groove of the linkage plate, driving the linkage plate to rotate 90 degrees, thereby synchronously rotating the positioning unit. This avoids manual operation and improves detection efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of coaxiality detection technology, specifically a rapid mechanism for detecting the coaxiality of a cross shaft. Background Technology

[0002] A cross shaft, also known as a cross-shaft universal coupling, is a mechanical component used to transmit motion and power between two intersecting shafts.

[0003] According to the patent titled "A Detection Device for Inspecting the Coaxiality of the Threaded Hole and Outer Circle of a Crosshead" (Patent Publication No.: CN206862271U, Patent Publication Date: 2018-01-09), the device includes a detection rod. The detection rod comprises a threaded section and a smooth section, with the smooth section symmetrically arranged at both ends of the threaded section. The detection rod is mounted on the crosshead, and the threaded section of the detection rod mates with the threaded hole of the crosshead. A gauge is installed on both smooth sections of the detection rod. By setting the detection rod so that its geometric center engages with the crosshead via a threaded connection, and the two ends are symmetrically arranged with smooth sections, the smooth sections at both ends are balanced during inspection, preventing any imbalance and accurately reflecting the coaxiality of the threaded hole and the outer circle of the crosshead, thus effectively improving the inspection results.

[0004] Based on the aforementioned existing technology, the current rapid mechanism for detecting the coaxiality of cross shafts still has the following problems. Currently, the detection of the coaxiality of cross shafts generally requires the operator to manually remove the cross shaft from the fixture after the first pair of journals has been tested, then rotate it 90 degrees in the air, and then reinstall the other pair of journals into the fixture for positioning and clamping, and finally perform a second test. Since the workpiece needs to be clamped, positioned and disassembled twice, the entire testing process is time-consuming. Therefore, this utility model provides a rapid mechanism for detecting the coaxiality of cross shafts. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a rapid mechanism for detecting the coaxiality of cross shafts. This solves the following problems that existing rapid mechanisms for detecting the coaxiality of cross shafts still have: Currently, the detection of the coaxiality of cross shafts generally involves the operator manually removing the cross shaft from the fixture after the first pair of journals has been tested, then rotating it 90 degrees in the air, and then reinstalling the other pair of journals into the fixture for positioning and clamping, before finally performing a second test. Because the workpiece needs to be clamped, positioned, and disassembled twice, the entire testing process is time-consuming.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rapid mechanism for detecting the coaxiality of a cross shaft, comprising a worktable, a set of clamping and rotating mechanisms disposed on the top of the worktable, a detection mechanism disposed above the clamping and rotating mechanisms, and a steering mechanism disposed on the top of the worktable for achieving rapid detection of a 90-degree rotation of the cross shaft, the steering mechanism comprising:

[0007] A rotating unit, located on the top of the workbench, includes a frame fixedly installed on the top of the workbench. A rotating plate is rotatably installed at the bottom of the inner cavity of the frame. A positioning plate and a linkage column are fixedly installed on the top of the rotating plate. A linkage plate is rotatably installed in the inner cavity of the frame, and linkage slots are provided at all four ends of the linkage plate. By rotating the rotating plate, the linkage column slides into the interior of the linkage slot, realizing a 90-degree rotation of the linkage slot, and driving the positioning unit above the frame to rotate synchronously, realizing a 90-degree rotation of the cross shaft.

[0008] The positioning unit is located above the rotating unit and is used for pre-positioning the cross shaft.

[0009] Preferably, the main shaft of the linkage plate passes through the top of the frame and is fixedly installed with a top plate. A servo motor is fixedly installed at the bottom of the frame and is located inside the rectangular groove at the bottom of the workbench. The output end of the servo motor passes through the frame and is fixedly connected to the rotating plate. A third cylinder is fixedly installed at the bottom of the workbench and the output end of the third cylinder passes through the workbench and is fixedly connected to the frame.

[0010] Preferably, the positioning unit includes a cross-shaped housing fixedly installed on the top of the top plate. A cross rod is fixedly installed inside the cross-shaped housing. Sliding blocks are slidably installed on the surfaces of the four branches of the cross rod, and a positioning post is fixedly installed on the top of the sliding blocks. Springs are installed on the surfaces of the four branches of the cross rod. The springs push the sliding blocks and the positioning post to pre-position the cross shaft. A top cover is fixedly installed on the top of the cross-shaped housing, and the positioning post slides inside the cross groove of the top cover.

[0011] Preferably, the clamping and rotating mechanism includes a set of mounting brackets fixedly installed on the top of the workbench. A first cylinder is fixedly installed on one side of the mounting brackets, and a sliding column is rotatably installed at the output end of the first cylinder. A clamping head is fixedly installed at one end of the sliding column. A rotating cylinder is rotatably installed inside the mounting brackets, and the sliding column slides inside the rotating cylinder. A limit block is fixedly installed inside the rotating cylinder, and the limit block slides inside a limit groove opened on one side of the sliding column.

[0012] Preferably, a gear ring is fixedly installed on the surface of the rotating drum, and a micro motor is fixedly installed on one side of the mounting frame. The output end of the micro motor passes through the mounting frame and is fixedly installed with a gear, which meshes with the gear ring.

[0013] Preferably, the testing mechanism includes a top frame fixedly installed above the mounting frame, and a second cylinder is fixedly installed on the top of the top frame. The output end of the second cylinder passes through the top frame and is fixedly installed on a frame. A bidirectional lead screw is rotatably installed inside the frame. One end of the bidirectional lead screw passes through the frame and is fixedly connected to a motor output end on one side. A set of moving blocks is rotatably installed on the surface thread of the bidirectional lead screw, and a dial indicator is fixedly installed on the inner side of the moving blocks.

[0014] This invention provides a rapid mechanism for detecting the coaxiality of a cross shaft. Compared with the prior art, it has the following advantages:

[0015] 1. This rapid mechanism for detecting the coaxiality of a cross shaft achieves automatic 90-degree rotation detection of the cross shaft through a rotating unit. The rotating unit includes a frame, a rotating plate, a positioning plate, and a linkage column. The rotation of the rotating plate causes the linkage column to slide into the linkage groove of the linkage plate, driving the linkage plate to rotate 90 degrees, thereby causing the positioning unit to rotate synchronously. This avoids manual operation and improves detection efficiency and accuracy.

[0016] 2. This rapid mechanism for detecting the coaxiality of the cross shaft achieves rapid pre-positioning of the cross shaft through a positioning unit. The positioning unit includes a cross housing, a cross rod, a sliding block, a positioning pin, and a spring. The spring pushes the sliding block and the positioning pin to move, allowing the positioning pin to adaptively clamp the cross shaft, ensuring that the journal is aligned with the detection mechanism and improving the accuracy and consistency of the detection. Attached Figure Description

[0017] Figure 1 This is a frontal perspective view of the three-dimensional structure of this utility model;

[0018] Figure 2 This is a bottom-view perspective structural diagram of the present invention;

[0019] Figure 3 This is a partial top-view perspective structural diagram of the present invention;

[0020] Figure 4 This is a three-dimensional structural diagram of the positioning unit of this utility model.

[0021] Figure 5 This is a three-dimensional cross-sectional view of the clamping and rotating mechanism of this utility model;

[0022] Figure 6 This is a frontal three-dimensional structural view of the testing mechanism of this utility model.

[0023] In the diagram: 1-Workbench, 2-Steering mechanism, 21-Rotating unit, 211-Frame, 212-Rotating plate, 213-Positioning plate, 214-Linkage column, 215-Linkage plate, 216-Linkage groove, 217-Top plate, 218-Third cylinder, 219-Servo motor, 22-Positioning unit, 221-Cross box, 222-Cross rod, 223-Sliding block, 224-Positioning column, 225-Spring Spring, 226-Top cover, 3-Clamping and rotating mechanism, 31-Mounting bracket, 32-Rotating cylinder, 33-Sliding column, 34-Limiting block, 35-Limiting groove, 36-First cylinder, 37-Clamping head, 38-Gear ring, 39-Micro motor, 310-Gear, 4-Detection mechanism, 41-Top frame, 42-Second cylinder, 43-Frame, 44-Double lead screw, 45-Motor, 46-Moving block, 47-Dial indicator. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-6 This utility model provides a technical solution:

[0026] A rapid detection mechanism for the coaxiality of a crosshair includes a worktable 1, a set of clamping and rotating mechanisms 3 arranged on the top of the worktable 1, a detection mechanism 4 arranged above the clamping and rotating mechanisms 3, and a steering mechanism 2 arranged on the top of the worktable 1 for rapid detection of the crosshair rotating 90 degrees. The steering mechanism 2 includes:

[0027] The rotating unit 21 is located on the top of the workbench 1 and includes a frame 211 fixedly installed on the top of the workbench 1. A rotating plate 212 is rotatably installed at the bottom of the inner cavity of the frame 211. A positioning plate 213 and a linkage column 214 are fixedly installed on the top of the rotating plate 212. A linkage plate 215 is rotatably installed in the inner cavity of the frame 211, and linkage slots 216 are provided at all four ends of the linkage plate 215. By rotating the rotating plate 212, the linkage column 214 slides into the interior of the linkage slot 216 to realize the 90-degree rotation of the linkage slot 216, and drives the positioning unit 22 above the frame 211 to rotate synchronously to realize the 90-degree rotation of the cross shaft.

[0028] The positioning unit 22 is disposed above the rotating unit 21 and is used for pre-positioning the cross shaft.

[0029] In this embodiment, the main shaft of the linkage plate 215 passes through the top of the frame 211 and is fixedly installed with the top plate 217. The bottom of the frame 211 is fixedly installed with the servo motor 219, which is located inside the rectangular groove at the bottom of the workbench 1. The output end of the servo motor 219 passes through the frame 211 and is fixedly connected with the rotating plate 212. The bottom of the workbench 1 is fixedly installed with the third cylinder 218, and the output end of the third cylinder 218 passes through the workbench 1 and is fixedly connected with the frame 211.

[0030] The rotating unit 21 includes a frame 211, a rotating plate 212, a positioning plate 213, and a linkage column 214, as well as a linkage groove 216 on the linkage plate 215. When the rotating plate 212 rotates, the linkage column 214 slides into the linkage groove 216 to drive the linkage plate 215 to rotate 90 degrees, thereby driving the positioning unit 22 to rotate synchronously and completing the automatic rotation detection of the cross shaft.

[0031] The third cylinder 218 is model DSNU-20-50-PPV-A, which is electrically connected to an external power supply and is operated by a human-controlled control panel. The servo motor 219 is model EDSMT-2T110-020A. By setting up the servo motor 219 and the third cylinder 218, the servo motor 219 drives the rotating plate 212 to rotate, and the third cylinder 218 controls the lifting and lowering of the frame 211, realizing the automation and precise control of the rotating unit 21, and improving the stability and efficiency of the detection.

[0032] In this embodiment, the positioning unit 22 includes a cross-shaped housing 221 fixedly installed on the top of the top plate 217. A cross rod 222 is fixedly installed inside the cross-shaped housing 221. Sliding blocks 223 are slidably installed on the four surfaces of the cross rod 222. A positioning post 224 is fixedly installed on the top of the sliding block 223. Springs 225 are installed on the four surfaces of the cross rod 222. The springs 225 push the sliding blocks 223 and the positioning post 224 to pre-position the cross shaft. A top cover 226 is fixedly installed on the top of the cross-shaped housing 221, and the positioning post 224 slides inside the cross groove of the top cover 226.

[0033] The positioning unit 22 includes a cross housing 221, a cross rod 222, a sliding block 223, a positioning post 224, and a spring 225. The spring 225 pushes the sliding block 223 and the positioning post 224 to move, thereby achieving elastic pre-positioning of the cross shaft, ensuring that the journal is aligned with the detection position, and improving the detection accuracy.

[0034] In this embodiment, the clamping and rotating mechanism 3 includes a set of mounting brackets 31 fixedly installed on the top of the workbench 1. A first cylinder 36 is fixedly installed on one side of the mounting bracket 31, and a sliding column 33 is rotatably installed at the output end of the first cylinder 36. A clamping head 37 is fixedly installed at one end of the sliding column 33. A rotating cylinder 32 is rotatably installed inside the mounting bracket 31, and the sliding column 33 slides inside the rotating cylinder 32. A limiting block 34 is fixedly installed inside the rotating cylinder 32, and the limiting block 34 slides inside the limiting groove 35 opened on one side of the sliding column 33.

[0035] The first cylinder 36, model DSNU-20-50-PPV-A, is electrically connected to an external power source and is operated by a human-controlled control panel. Through the clamping and rotating mechanism 3, which includes a mounting bracket 31, a rotating cylinder 32, a sliding column 33, and a clamping head 37, the first cylinder 36 drives the sliding column 33 to move, causing the clamping head 37 to clamp the cross shaft. The rotating cylinder 32 ensures sliding stability through a limiting block 34 and a limiting groove 35, thus achieving a firm clamping and rotation of the cross shaft.

[0036] In this embodiment, a toothed ring 38 is fixedly installed on the surface of the rotating drum 32, and a micro motor 39 is fixedly installed on one side of the mounting frame 31. The output end of the micro motor 39 passes through the mounting frame 31 and is fixedly installed with a gear 310, and the gear 310 meshes with the toothed ring 38.

[0037] The micro motor 39, model OMV800, is electrically connected to an external power supply and can be opened and closed via a human-operated control panel. The micro motor 39 drives the rotating drum 32 to rotate through the meshing of the gear ring 38 on the surface of the rotating drum 32 with the gear 310 output by the micro motor 39, thereby enabling the rotating drum 32 to rotate and the cross shaft to rotate. This achieves comprehensive detection of the journal and improves the coverage of coaxiality detection.

[0038] In this embodiment, the detection mechanism 4 includes a top frame 41 fixedly installed above the mounting frame 31, and a second cylinder 42 is fixedly installed on the top of the top frame 41. The output end of the second cylinder 42 passes through the top frame 41 and is fixedly installed on a frame 43. A bidirectional lead screw 44 is rotatably installed inside the frame 43. One end of the bidirectional lead screw 44 passes through the frame 43 and is fixedly connected to the output end of a motor 45 on one side. A set of moving blocks 46 is rotatably installed on the surface of the bidirectional lead screw 44, and a dial indicator 47 is fixedly installed on the inner side of the moving blocks 46.

[0039] The second cylinder 42, model DSNU-20-50-PPV-A, is electrically connected to an external power source and its opening and closing operation is achieved through a personnel-operated control panel. The motor 45, model KV3SF-8521F-WR, is also electrically connected to an external power source and its opening and closing operation is achieved through a personnel-operated control panel. The detection mechanism 4 includes a top frame 41, a second cylinder 42, a frame 43, a double-acting lead screw 44, a motor 45, a moving block 46, and a dial indicator 47. The second cylinder 42 controls the lifting and lowering of the frame 43, the motor 45 drives the double-acting lead screw 44 to move the moving block 46, and the dial indicator 47 detects the coaxiality of the journal, thus realizing automated detection and data recording.

[0040] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0041] During operation, first, the cross shaft is placed between the four positioning pins 224. The spring 225 pushes the sliding block 223 with its own elastic force, so that the sliding block 223 drives the positioning pins 224 to move synchronously, and the positioning pins 224 pre-position the cross shaft.

[0042] Next, the third cylinder 218 drives the frame 211 to move upward, the first cylinder 36 operates to drive the sliding column 33 to move, the sliding column 33 drives the clamping head 37 to move synchronously, the sliding column 33 fixes the cross shaft, the third cylinder 218 drives the frame 211 to move downward, the second cylinder 42 operates to move the frame 43 downward, so that the dial indicator 47 is located above the journal surface of the cross shaft.

[0043] Then, the micro motor 39 drives the gear ring 38 to rotate, the gear ring 38 drives the sliding column 33 and the clamping head 37 to rotate, causing the cross shaft to rotate, and the clamping head 37 performs coaxiality detection on the cross shaft.

[0044] Finally, the third cylinder 218 moves the frame 211 upward to position the cross shaft. The servo motor 219 drives the rotating plate 212 to rotate, and the linkage column 214 slides into the linkage groove 216, causing the linkage plate 215 to rotate 90 degrees. After rotation, the arc surface of the positioning plate 213 is inserted into the arc groove of the linkage plate 215 to fix the position of the linkage plate 215. At the same time, the linkage plate 215 drives the top plate 217 to rotate, thereby driving the positioning unit 22 to rotate and making the cross shaft rotate synchronously to detect the other journal of the cross shaft.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid mechanism for detecting the coaxiality of a cross shaft, comprising a worktable, a set of clamping and rotating mechanisms disposed on the top of the worktable, and a detection mechanism disposed above the clamping and rotating mechanisms, characterized in that: The top of the workbench is equipped with a steering mechanism for rapid detection by rotating the cross shaft 90 degrees. The steering mechanism includes: A rotating unit, located on the top of the workbench, includes a frame fixedly installed on the top of the workbench. A rotating plate is rotatably installed at the bottom of the inner cavity of the frame. A positioning plate and a linkage column are fixedly installed on the top of the rotating plate. A linkage plate is rotatably installed in the inner cavity of the frame, and linkage slots are provided at all four ends of the linkage plate. By rotating the rotating plate, the linkage column slides into the interior of the linkage slot, realizing a 90-degree rotation of the linkage slot, and driving the positioning unit above the frame to rotate synchronously, realizing a 90-degree rotation of the cross shaft. The positioning unit is located above the rotating unit and is used for pre-positioning the cross shaft.

2. The rapid mechanism for detecting the coaxiality of a cross shaft according to claim 1, characterized in that: The main shaft of the linkage plate passes through the top of the frame and is fixedly installed with a top plate. A servo motor is fixedly installed at the bottom of the frame and is located inside the rectangular groove at the bottom of the workbench. The output end of the servo motor passes through the frame and is fixedly connected to the rotating plate. A third cylinder is fixedly installed at the bottom of the workbench and the output end of the third cylinder passes through the workbench and is fixedly connected to the frame.

3. The rapid mechanism for detecting the coaxiality of a cross shaft according to claim 2, characterized in that: The positioning unit includes a cross-shaped housing fixedly installed on the top of the top plate. A cross rod is fixedly installed inside the cross-shaped housing. Sliding blocks are slidably installed on the four surfaces of the cross rod, and a positioning post is fixedly installed on the top of the sliding blocks. Springs are installed on the four surfaces of the cross rod. The springs push the sliding blocks and the positioning post to pre-position the cross shaft. A top cover is fixedly installed on the top of the cross-shaped housing, and the positioning post slides inside the cross groove of the top cover.

4. The rapid mechanism for detecting the coaxiality of a cross shaft according to claim 1, characterized in that: The clamping and rotating mechanism includes a set of mounting brackets fixedly installed on the top of the workbench. A first cylinder is fixedly installed on one side of the mounting brackets, and a sliding column is rotatably installed at the output end of the first cylinder. A clamping head is fixedly installed at one end of the sliding column. A rotating cylinder is rotatably installed inside the mounting brackets, and the sliding column slides inside the rotating cylinder. A limit block is fixedly installed inside the rotating cylinder, and the limit block slides inside a limit groove opened on one side of the sliding column.

5. A rapid mechanism for detecting the coaxiality of a cross shaft according to claim 4, characterized in that: A gear ring is fixedly installed on the surface of the rotating drum, and a micro motor is fixedly installed on one side of the mounting frame. The output end of the micro motor passes through the mounting frame and is fixedly installed with a gear, which meshes with the gear ring.

6. The rapid mechanism for detecting the coaxiality of a cross shaft according to claim 4, characterized in that: The testing mechanism includes a top frame fixedly installed above the mounting bracket, and a second cylinder is fixedly installed on the top of the top frame. The output end of the second cylinder passes through the top frame and is fixedly installed on a frame. A bidirectional lead screw is rotatably installed inside the frame. One end of the bidirectional lead screw passes through the frame and is fixedly connected to a motor output end on one side. A set of moving blocks is rotatably installed on the surface thread of the bidirectional lead screw, and a dial indicator is fixedly installed on the inner side of the moving blocks.

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