A drive shaft runout detection device

Abstract

The application discloses a kind of transmission shaft run-out detection devices, including support, relative arrangement;Two described supports are detachably connected by slide bar assembly, and support can be transversely slid along the length direction of slide bar assembly, for adjusting the lateral spacing of two side supports;Positioning support assembly;The positioning support assembly is two groups, symmetrically arranged on the upper end of each support, and each positioning support assembly includes a pair of positioning wheels, and the positioning groove is formed between the same side described positioning wheel upward opening, and the outer wall of transmission shaft is adapted, the device is simple and quick, and the efficiency is high: two groups of four positioning wheels form fixed positioning groove, transmission shaft is directly placed, and automatic centering can be achieved, the cumbersome steps of manual lifting and center alignment are saved, positioning time is shortened, and detection efficiency is greatly improved.

Description

Technical Field

[0001] This invention belongs to the technical field of shaft workpiece detection devices, specifically relating to a transmission shaft runout detection device. Background Technology

[0002] In marine propulsion systems, propeller shafts are critical transmission shaft components. Their straightness and radial runout directly affect transmission smoothness and service life. Before and after machining, repair, and installation, radial runout testing of the transmission shaft is required to ensure that it meets industry standards.

[0003] Currently, most commonly used drive shaft runout detection fixtures are simple structures with the following obvious defects: (1) Cumbersome positioning and low efficiency: lacking a dedicated centering structure, the drive shaft is placed on the center axis of the positioning pins on both sides, requiring manual lifting and repeated alignment of the shaft center throughout the process, which is cumbersome and has low detection efficiency; (2) Poor versatility: the support spacing is a fixed structure, and the span cannot be adjusted, so it can only be adapted to drive shafts of a single length specification, which has a limited range of applications; Poor portability: The solid iron plate is bulky and cannot be disassembled or extended for storage, making it inconvenient to carry to field operations such as the field, docks, and wharves. To address the shortcomings of the existing technology, this invention provides a drive shaft runout detection device that is easy to position, provides stable support, is adjustable, lightweight, and can be disassembled and stored, thereby solving the problems existing in the prior art. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A drive shaft runout detection device, comprising: Supports, set relative to each other; The slide rod assembly allows the two supports to be detachably connected, and the supports can slide laterally along the length of the slide rod assembly to adjust the lateral spacing between the two supports. Positioning support components; and Instrumentation testing components; The positioning support components are in two sets, symmetrically arranged on the upper end of each support. Each set of positioning support components includes a pair of positioning wheels, and the positioning wheels on the same side form an upward-opening positioning groove that is adapted to the outer wall of the drive shaft. The slide rod assembly is provided with limiting and locking structures at both ends to limit the relative sliding range of the support and fix the position of the support.

[0005] Furthermore, the instrument detection component is connected to the slide rod assembly and can move laterally along the slide rod assembly. The instrument detection component can be adjusted in height and / or angle.

[0006] Furthermore, the instrument detection assembly includes a sliding base, an adjustment bracket, and a detection instrument.

[0007] Furthermore, the slide rod assembly includes three parallel slide rods, which are respectively connected to the upper and lower parts of the support.

[0008] Furthermore, the support adopts a trapezoidal frame structure.

[0009] Furthermore, the support is provided with multiple weight-reducing holes.

[0010] Furthermore, the limiting and locking structure is a threaded locking nut.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This device offers simple, quick, and efficient positioning: it uses two sets of four positioning wheels to form a fixed positioning groove, allowing the drive shaft to be placed directly for automatic centering, eliminating the tedious steps of manual lifting and center alignment, thus shortening the positioning time and significantly improving detection efficiency. High stability and not easy to tip over: The support adopts a trapezoidal structure with a large bottom support area and a low center of gravity. Combined with the four positioning wheels to form a four-point stable support, it completely solves the problem of traditional tooling being easy to tip over, making the testing process safe and reliable. Lightweight and portable: The support has weight-reducing holes, and the slide bar is made of lightweight alloy material. The overall weight is only 1 / 3 of that of traditional solid iron plate devices. All parts can be disassembled, and the disassembled parts are compact in size, making them easy to store and transport, and suitable for field operation scenarios such as the field, docks, and shipyards. High versatility: The support can slide laterally along the slide bar to adjust the spacing, adapting to drive shafts of different lengths. The spacing of the positioning wheels is designed according to the commonly used shaft diameter, and can be adapted to mainstream drive shafts such as φ30–φ80mm, with a wide range of applications. High detection accuracy and no damage to the shaft: The positioning wheel is a rolling bearing that rotates with the drive shaft. The friction is small, so it will not scratch the shaft surface or hinder the shaft rotation, ensuring the stability of the detection benchmark and improving the accuracy of runout detection. Simple structure and easy maintenance: The positioning wheel adopts standard rolling bearings, which are reliable in structure and can be quickly disassembled and replaced after wear, resulting in low maintenance costs. In addition, the overall structure has no complicated adjustment mechanism, resulting in a low failure rate and making it easy to use for a long time. Attached Figure Description

[0012] Figure 1 A three-dimensional structural diagram illustrating a specific embodiment of the present invention (view 1); Figure 2 A three-dimensional structural diagram illustrating a specific embodiment of the present invention (view 2); Figure 3 A three-dimensional structural diagram showing the drive shaft after placement is provided to illustrate a specific embodiment of the present invention; The reference numerals in the accompanying drawings include: Support 1, weight reduction hole 10, slide rod 2, positioning wheel 30, positioning groove 31, limit locking structure 4, instrument detection assembly 5, sliding seat 50, detection instrument 51, adjusting bracket 52, drive shaft 6. Detailed Implementation

[0013] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0015] like Figure 1 - Figure 3 As shown, the drive shaft runout detection device of the present invention includes two oppositely arranged supports 1, a slide rod assembly, a positioning support assembly, and an instrument detection assembly 5. The specific structure and connection relationship of each component are as follows: Support 1, two identical supports 1 arranged symmetrically, serves as the overall support foundation for the device. Support 1 adopts a trapezoidal frame structure, with the bottom width greater than the top width. When placed on the ground or work platform, it provides a large support area and a low center of gravity, effectively preventing the device from tipping over and improving the safety of the testing process. The main body of support 1 features a hollow structure in the middle, with multiple evenly distributed weight-reducing holes 10. The weight-reducing holes 10 are preferably rectangular through holes. While ensuring the structural strength and support rigidity of support 1, the overall weight of the device is significantly reduced, making it noticeably lighter than traditional solid iron plate structures, facilitating manual handling and field transport.

[0016] Meanwhile, the corners of the trapezoidal frame of support 1 are rounded to prevent bumps and scratches to operators or drive shafts during operation.

[0017] The sliding rod assembly includes three parallel sliding rods 2, which are respectively connected to the upper, middle and lower parts of the support 1, or two of the sliding rods are arranged in parallel at the lower part to form a stable frame structure and ensure the rigidity of the two supports 1 after connection.

[0018] The support 1 has a sliding hole that matches the slide rod 2. The slide rod passes through the sliding hole, allowing the two supports 1 to slide freely laterally along the slide rod, thereby adjusting the distance between the two supports 1 to accommodate drive shafts 6 of different lengths.

[0019] The slide bar and support 1 are detachable. After the test is completed, the slide bar and support 1 can be separated to further reduce the storage volume and improve portability.

[0020] The slide bar in this embodiment is made of lightweight alloy material, taking into account both strength and lightweight requirements. It is equipped with a limiting locking structure 4 at both ends, preferably a threaded locking nut, which can limit the sliding range of the support 1 and prevent the support 1 from sliding out of the end of the slide bar. It can also lock the support 1 and the slide bar after the distance between the support 1 is adjusted to the correct position, ensuring the stability of the support 1 during the testing process.

[0021] The positioning support components are the core support and positioning structures of the device. There are two sets, symmetrically arranged at the upper end of each support 1. The two sets of positioning support components work together to support and position the drive shaft 6.

[0022] Each positioning support assembly includes two positioning wheels 30, with the following specific structure and function: The positioning wheels 30 adopt standard deep groove ball rolling bearings with a smooth cylindrical outer ring, which is wear-resistant and rotates flexibly. They are made of bearing steel with chrome-plated anti-rust treatment, making them suitable for humid and dusty outdoor and dock working environments, thus extending their service life. The rated dynamic load of the positioning wheels 30 is ≥10kN, meeting the testing requirements of heavy-duty drive shafts such as ship propeller shafts. The positioning wheels 30 are rotatably connected to the support 1 using mounting shafts. The mounting shafts are made of metal and are fixedly installed on the support 1 to ensure support stability. The axis of the mounting shafts is parallel to the axis of the drive shaft to be tested. The two mounting shafts are arranged horizontally and coaxially with a fixed spacing, designed according to the diameter range of commonly used drive shafts, ensuring that the positioning grooves 31 formed by the positioning wheels 30 can accommodate drive shafts of mainstream specifications such as φ30–φ80mm.

[0023] Assembly relationship: The two positioning wheels 30 are respectively sleeved on the corresponding mounting shaft (not shown in the figure). The inner ring is interference fit with the mounting shaft. The end of the mounting shaft is provided with a retaining spring to limit the axial movement of the positioning wheel 30, so that the positioning wheel 30 can rotate freely without axial movement. A fixed gap is left between the two positioning wheels 30 to form an upward-opening arc-shaped positioning groove 31. The bottom height of the positioning groove 31 is consistent with the center height of the drive shaft to ensure that the center of the drive shaft is aligned after placement.

[0024] Positioning principle: The drive shaft is placed directly in the positioning groove 31 between the two positioning wheels 30. Under its own gravity, it automatically falls into the lowest position in the middle of the two positioning wheels 30, achieving automatic centering without manual alignment or the need for the two ends to be tightened for positioning. Each set of two positioning wheels 30 forms two-point support, and the four positioning wheels 30 in the left and right sets together form four-point stable support, ensuring that the drive shaft will not wobble or tip over after placement, further improving the overall stability of the device. In addition, this device adopts a detachable design: the positioning wheels 30 are detachably connected to the mounting shaft. When the positioning wheels 30 wear out, they can be quickly disassembled and replaced, reducing usage and maintenance costs, and also facilitating storage and transport after disassembly.

[0025] In this invention, the installation position and spacing of the positioning wheels 30 are fixed, and no spacing adjustment mechanism is provided to ensure support rigidity and detection stability, and to avoid accuracy errors caused by the adjustment mechanism.

[0026] In addition, the instrument detection component 5 in this device is installed on the uppermost slide rod 2 and is used to detect the radial runout of the drive shaft in real time. The instrument detection component 5 includes a sliding seat 50, an adjusting bracket, and a detection instrument 51. The sliding seat 50 is made of aluminum alloy and is sleeved on the upper slide rod, slidably connected to the slide rod. The sliding seat 50 is equipped with a locking screw, which can be locked and fixed after sliding to the target position to align with different detection sections of the drive shaft. The adjustment bracket is a double-segment hinged metal bracket. One end is hinged to the sliding seat 50, and the other end is connected to the detection instrument. It can realize 0-90° angle adjustment and 0-10cm height adjustment, so that the probe of the detection instrument can elastically abut against the peripheral wall of the drive shaft to ensure detection accuracy.

[0027] Specifically, the preferred testing instrument is a dial indicator or a micrometer. The dial indicator has a range of 0-10mm and an accuracy of 0.01mm, while the micrometer has an accuracy of 0.001mm. The choice can be made according to the required testing accuracy to ensure accurate acquisition of the radial runout data of the drive shaft.

[0028] Working principle of this device The drive shaft runout detection device of the present invention is used as follows: Spacing adjustment: Based on the length of the drive shaft to be tested, loosen the threaded lock nuts at both ends of the slide rod, slide the two supports 1 laterally along the slide rod, adjust to the spacing that matches the length of the drive shaft, and after adjustment, tighten the threaded lock nuts to fix the position of the supports 1. Drive shaft positioning: The drive shaft to be tested is placed directly between the positioning wheels 30 of the left and right positioning support components. Relying on its own weight, the drive shaft will automatically fall into the centering position of the positioning groove 31, completing automatic centering without manual lifting or additional alignment. Instrument Adjustment: Move the sliding seat 50 of the instrument detection component 5 to align it with the section to be measured on the drive shaft, and tighten the locking screw on the sliding seat 50 to fix its position. Adjust the height and angle of the detection instrument by adjusting the bracket, so that the instrument probe elastically abuts against the peripheral wall of the drive shaft, and adjust the instrument pointer to zero. Radial runout detection: The drive shaft is slowly rotated manually or with external power. During rotation, the positioning wheel 30 rotates passively and synchronously with the drive shaft, forming rolling friction. The friction is minimal and will not hinder the rotation of the drive shaft or scratch its surface. The radial runout of the drive shaft is determined by observing the changes in the dial reading of the testing instrument and recording the maximum and minimum readings. The difference between the two readings is the radial runout of the drive shaft. The runout data is used to determine whether the bending and deformation of the shaft meets industry standards. Storage and handling: After the inspection is completed, the connection between the slide rod and the support 1 is disassembled, or the connection between the positioning wheel 30 and the mounting shaft is further disassembled, and each component is disassembled and stored. After disassembly, the volume is reduced to 1 / 5 of the original volume, and the weight is light, making it easy to manually transport to the next work scene.

[0029] It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A drive shaft runout detection device, characterized in that, include: Supports, set relative to each other; The slide rod assembly allows the two supports to be detachably connected, and the supports can slide laterally along the length of the slide rod assembly to adjust the lateral spacing between the two supports. Positioning support components; and Instrumentation testing components; The positioning support components are in two sets, symmetrically arranged on the upper end of each support. Each set of positioning support components includes a pair of positioning wheels, and the positioning wheels on the same side form an upward-opening positioning groove that is adapted to the outer wall of the drive shaft. The slide rod assembly is provided with limiting and locking structures at both ends to limit the relative sliding range of the support and fix the position of the support.

2. The drive shaft runout detection device as described in claim 1, characterized in that: The instrument detection component is connected to the slide rod assembly and can move laterally along the slide rod assembly. The instrument detection component can be adjusted in height and / or angle.

3. The drive shaft runout detection device as described in claim 2, characterized in that: The instrument testing assembly includes a sliding base, an adjusting bracket, and a testing instrument.

4. A drive shaft runout detection device as described in claim 1, 2, or 3, characterized in that: The slide bar assembly includes three parallel slide bars, which are respectively connected to the upper and lower parts of the support.

5. The drive shaft runout detection device as described in claim 4, characterized in that: The support adopts a trapezoidal frame structure.

6. The drive shaft runout detection device as described in claim 5, characterized in that: The support has multiple weight-reducing holes.

7. The drive shaft runout detection device as described in claim 1, characterized in that: The limiting and locking structure is a threaded lock nut.

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