Shaft runout measuring device

Abstract

The utility model provides a shaft run-out measuring device, which comprises at least two supporting units, the supporting units are distributed along the axial direction of a shaft to be measured so as to jointly support the shaft to be measured, all the supporting units are distributed along the axial direction of the shaft to be measured, and each supporting unit comprises a supporting assembly and a height adjusting assembly, the height adjusting assembly is used for adjusting the height of the supporting assembly, so that the height of the supporting assembly of each supporting unit is the same, the supporting assembly comprises a rotating component, the rotating component is used for supporting a shaft to be measured, and the rotating component can rotate along with the rotation of the shaft to be measured; and a shaft run-out measuring unit for contacting the outer peripheral surface of the shaft to be measured to measure the shaft run-out. The shaft run-out testing device is not affected by sites, is particularly suitable for shaft run-out testing of long shafts with different outer diameters, can freely adjust the long shafts to be in a horizontal state under different environment influences, and is high in checking efficiency and accurate and reliable in testing data.

Description

Technical Field

[0001] This utility model relates to the field of machining inspection, and in particular to a shaft runout measuring device. Background Technology

[0002] Shaft runout refers to the deviation of the actual center line of rotation of a rotating shaft from its theoretical center line during rotation. This deviation causes periodic radial or axial deviations during rotation, typically manifesting as runout or oscillation on the shaft surface. Shaft runout is an important indicator for measuring the machining accuracy and assembly quality of rotating components (such as motor shafts, gear shafts, and spindles).

[0003] Shaft runout is one of the core parameters for evaluating the quality of rotating components. Measuring shaft runout not only ensures equipment performance and accuracy but also prevents potential failures and reduces maintenance costs, making it an indispensable part of mechanical design, manufacturing, and maintenance.

[0004] Measuring shaft runout is crucial for several reasons. First, it ensures equipment operating accuracy. Excessive shaft runout can cause vibration or wobbling in rotating components (such as gears, impellers, and spindles), directly affecting the machining accuracy (e.g., machine tools, precision instruments) or operational stability (e.g., motors, pumps). Second, it extends equipment lifespan. Vibration caused by runout accelerates the wear of bearings, seals, and other components, shortening their service life. Third, it prevents malfunctions and safety hazards. Abnormal runout may indicate bearing damage, shaft bending, or misalignment of couplings; timely detection can prevent sudden malfunctions or accidents (e.g., breakage of high-speed rotating equipment). Fourth, it improves energy efficiency and reduces noise. Vibration caused by runout increases energy loss and operating noise; correcting runout optimizes equipment efficiency. Fifth, it ensures compliance with industry standards and specifications. Many industries (such as automotive, aerospace, and machine tool manufacturing) have strict standards for shaft runout (e.g., ISO or DIN standards), making shaft runout measurement a key step in quality control.

[0005] For long shafts that are relatively heavy, it is impossible to measure their runout without using a machine tool, thus making it impossible to check product quality. This will inevitably bring potential quality problems to the product. However, testing on a machine tool has the disadvantages of low efficiency, high cost, and measurement data being affected by the accuracy of the machine tool. There is an urgent need for a convenient, flexible device that is not affected by the location to measure the shaft runout of long shafts. Utility Model Content

[0006] The purpose of this invention is to provide a shaft runout measuring device that is not affected by the site and is especially suitable for shaft runout testing of long shafts with different outer diameters. It can freely adjust the long shaft to a horizontal state under different environmental influences, resulting in high inspection efficiency and accurate and reliable test data.

[0007] To achieve the above objectives, this utility model provides a shaft runout measuring device, which includes:

[0008] At least two support units are provided, which are distributed along the axial direction of the shaft to be measured to jointly support the shaft to be measured, and all the support units are distributed along the axial direction of the shaft to be measured. Each support unit includes a support component and a height adjustment component. The height adjustment component is used to adjust the height of the support component so that the height of the support component of each support unit is the same. The support component includes a rotating member for supporting the shaft to be measured, and the rotating member can rotate with the shaft to be measured.

[0009] A shaft runout measuring unit is used to contact the outer peripheral surface of the shaft to be measured in order to measure shaft runout.

[0010] Optionally, one of the support components includes a support and two rotating members, the two rotating members being parallel to each other and mounted on the support, with a space between the two rotating members for placing the shaft to be measured.

[0011] Optionally, the rotating component includes a first shaft and a rotating element. The rotating element is sleeved on the first shaft. The outer peripheral surface of the rotating element is used to contact the outer peripheral surface of the shaft to be tested and can rotate with the shaft to be tested. The two ends of the first shaft are mounted on the support.

[0012] Optionally, the support includes a base and two support frames, the two support frames are disposed on the base, the two support frames are respectively located at both ends of the first shaft, each support frame is provided with at least a pair of positioning grooves, each positioning groove is used to accommodate one first shaft, the two positioning grooves in a pair of positioning grooves are at the same height so that the corresponding two first shafts are at the same height, and the base is connected to the height adjustment component.

[0013] Optionally, the shaft runout measuring device includes a level, which is used to ensure that the shaft under test is in a horizontal state.

[0014] Optionally, the height adjustment assembly includes a hydraulic cylinder and a push rod, the push rod being driven by the hydraulic cylinder and connected to the support assembly to adjust the height of the support assembly.

[0015] Optionally, the support unit further includes a moving component, which includes a mounting base and a plurality of pulleys. The height adjustment component is disposed on the mounting base, and the pulleys are mounted on the mounting base to drive the entire support unit to move.

[0016] Optionally, the moving component includes a locking component for locking the position of the moving component.

[0017] Optionally, the locking assembly includes an adjusting bolt passing through the mounting base, the adjusting bolt locking the position of the movable assembly by abutting against the platform supporting the pulley.

[0018] Optionally, the shaft runout measuring unit includes a bracket and a dial indicator, or a bracket and a micrometer indicator; the dial indicator or the micrometer indicator is mounted on the bracket and is used to contact the shaft to be measured to measure its shaft runout.

[0019] As configured above, this invention supports the shaft under test via a support unit, and the height of each support component can be adjusted via a height adjustment assembly to keep the shaft under test horizontal. Furthermore, the rotating component supporting the shaft under test can rotate with the shaft under test, facilitating the measurement of shaft runout using the shaft runout measurement unit. This invention's shaft runout measurement device is convenient, flexible, and low-cost. It is unaffected by location and can perform shaft runout measurement without a machine tool. It is particularly suitable for testing the shaft runout of long shafts with varying outer diameters. Under different environmental conditions, the long shaft can be freely adjusted to a horizontal state, resulting in high inspection efficiency and accurate and reliable test data, thus ensuring product quality. Attached Figure Description

[0020] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

[0021] Figure 1 This is a schematic diagram of a shaft runout measuring device and a shaft to be measured according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the support frame of the shaft runout measuring device according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the rotating component of a shaft runout measuring device according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the hydraulic cylinder and push rod of an embodiment of the shaft runout measuring device of the present invention;

[0025] Figure 5 This is a schematic diagram of the base of a shaft runout measuring device according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the mounting base and pulley of the shaft runout measuring device according to an embodiment of the present invention.

[0027] The reference numerals in the attached figures are as follows:

[0028] 1-Support unit; 11-Support assembly; 111-Support; 1111-Base; 1112-Support frame; 112-Rotating component; 1121-First shaft; 1122-Rotating component; 12-Height adjustment assembly; 121-Hydraulic cylinder; 122-Push rod; 1221-End; 13-Moving assembly; 131-Adjusting bolt; 132-Mounting seat; 1321-Threaded hole; 133-Pulley; 134-Second shaft; 135-Bearing seat; 136-Locking nut; 2-Shaft runout measuring unit; 3-Shaft to be measured; 4-Level; 7-Hole; 8-First positioning groove; 9-Second positioning groove. Detailed Implementation

[0029] In this document, unless otherwise stated, the terms “upper,” “lower,” “left,” “right,” “inner,” “outer,” “front,” “back,” “top,” “bottom,” etc., are used to indicate orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a characteristic orientation and operation, and therefore should not be construed as a limitation of the present invention.

[0030] The specific embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0031] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.

[0032] Figure 1 This is a schematic diagram of a shaft runout measuring device and the shaft to be measured according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the support frame of an embodiment of the shaft runout measuring device of this utility model. Figure 3 This is a schematic diagram of the rotating component of a shaft runout measuring device according to an embodiment of this utility model. Please refer to it. Figure 1 , Figure 2 and Figure 3 This utility model provides a shaft runout measuring device, including a shaft runout measuring unit 2 and at least two support units 1.

[0033] Support units 1 are distributed along the axial direction of the shaft to be measured 3 to jointly support the shaft to be measured 3. All support units 1 are distributed along the axial direction of the shaft to be measured 3. Each support unit 1 includes a support assembly 11 and a height adjustment assembly 12. The height adjustment assembly 12 is used to adjust the height of the support assembly 11 so that the height of the support assembly 11 in each support unit 1 is the same. The support assembly 11 includes a rotating member 112, which is used to support the shaft to be measured 3 and can rotate with the shaft to be measured 3. Further, a support assembly 11 includes a support 111 and two rotating members 112. The two rotating members 112 are parallel to each other and mounted on the support 111. There is space between the two rotating members 112 for placing the shaft to be measured 3. That is, the rotation axes of the two rotating members 112 are parallel to each other. At the same time, the rotation axis of the rotating member 112 is parallel to the axial direction of the shaft to be measured 3. It can be understood that the two rotating members 112 in a support assembly 11 are distributed along the outer periphery of the shaft to be measured 3 to support the shaft to be measured 3.

[0034] For example, the rotating component 112 includes a first shaft 1121 and a rotating element 1122. The rotating element 1122 is sleeved on the first shaft 1121. The outer peripheral surface of the rotating element 1122 is used to contact the outer peripheral surface of the shaft to be measured 3 and can rotate with the shaft to be measured 3. The two ends of the first shaft 1121 are mounted on the support 111, and the first shaft 1121 does not rotate. For example, the rotating element 1122 can be a bearing, in which case the outer ring of the bearing is used to contact the outer peripheral surface of the shaft to be measured 3 and can rotate with the shaft to be measured 3, so that the shaft to be measured 3 can be rotated when the measuring shaft runs out, increasing the rotation flexibility and improving the detection efficiency.

[0035] Furthermore, the support 111 includes a base 1111 and two support frames 1112. The two support frames 1112 are mounted on the base 1111 and are located at both ends of the first shaft 1121. Each support frame 1112 has at least one pair of positioning grooves, each positioning groove for accommodating one first shaft 1121. The two positioning grooves in a pair are at the same height so that the corresponding two first shafts 1121 are at the same height, thereby making the rotating parts 1122 on the two first shafts 1121 at the same height, ensuring the stability of the support. The base 1111 is connected to the height adjustment assembly 12. Specifically, the two support frames 1112 in a support 111 can be parallel support plates, which stand upright on the base 1111. For example, the support plates can be welded to the base 1111. The support frame 1112 is provided with at least one pair of positioning grooves, so that the support assembly 11 can be adapted to a wider range of shafts 3 to be measured. It is understood that during each measurement, one pair of positioning grooves can be selected from multiple pairs to accommodate shafts 3 with different outer diameters. In this embodiment, the positioning grooves can be U-shaped grooves, with the positions and shapes of the two positioning grooves in the same pair being symmetrical. In this embodiment, the support frame 1112 is provided with two pairs of positioning grooves, namely a pair of first positioning grooves 8 and a pair of second positioning grooves 9. The distance between the first positioning grooves 8 is smaller than the distance between the second positioning grooves 9. The two second positioning grooves 9 are located on the two outer sides of the two first positioning grooves 8. It is understood that the second positioning grooves 9 are suitable for shafts 3 with larger outer diameters. During measurement, the two ends of the first shaft 1121 are placed in the positioning grooves of the two support frames 1112 respectively. Each support frame 1112 uses one pair of positioning grooves, and two first shafts 1121 are placed on the two support frames 1112 of one support 111.

[0036] The height adjustment assembly 12 includes a hydraulic cylinder 121 and a push rod 122. The push rod 122 is driven by the hydraulic cylinder 121 and is connected to the support assembly 11 to adjust the height of the support assembly 11. For example, the push rod 122 is fixedly connected to the base 1111. The push rod 122 and the base 1111 can be connected, for example, by bolts (not shown in the figure). It is understood that both the push rod 122 and the base 1111 are provided with holes 7 for mounting bolts. Please refer to [reference needed]. Figure 4 and Figure 5 In this embodiment, the rod portion of the push rod 122 is cylindrical, and the end portion 1221 of the push rod 122 (i.e., the end connected to the base 1111) is rectangular. Please refer to [reference needed]. Figure 1 and Figure 4 Furthermore, the hydraulic cylinder 121 can be, for example, an oil cylinder, and the hydraulic cylinder 121 also has a pipe (not shown in the figure) for conveying oil to realize the up and down movement of the push rod 122, thereby adjusting the height of the support assembly 11.

[0037] The shaft runout measuring unit 2 is used to contact the outer peripheral surface of the shaft 3 to measure shaft runout. Preferably, the shaft runout measuring unit 2 includes a bracket and a dial indicator, or a bracket and a micrometer indicator; the dial indicator or micrometer indicator is mounted on the bracket (not shown in the figure) so that the head of the dial indicator or micrometer indicator contacts the outer peripheral surface of the shaft 3 to measure its shaft runout.

[0038] The shaft runout measuring device also includes a level 4, which is used to ensure that the shaft 3 to be measured is in a horizontal state, thereby improving the accuracy of shaft runout measurement. In use, the level 4 is placed on the shaft 3 to be measured and adjusted to be level.

[0039] For a better option, please refer to the following. Figure 1 and Figure 6 The support unit 1 also includes a moving assembly 13, which includes a mounting base 132 and a plurality of pulleys 133. A height adjustment assembly 12 is mounted on the mounting base 132. For example, the bottom of a hydraulic cylinder 121 can be connected to the mounting base 132 by bolts (not shown in the figure). The pulleys 133 are mounted on the mounting base 132 to move the entire support unit 1. For example, there are four pulleys 133. It can be understood that two second shafts 134 and bearing seats 135 corresponding to each pulley 133 are provided below the mounting base 132. Each bearing seat 135 contains a bearing and is connected to the mounting base 132 by bolts. The second shafts 134 and the bearings on the bearing seats 135 are assembled and connected by tolerance fit, for example, the second shaft 134 can be interference-fitted with the inner ring of the bearing. A pulley 133 is installed at each end of the second shaft 134, and the second shaft 134 and the pulleys 133 are assembled and connected by tolerance fit, for example, the second shaft 134 and the pulleys 133 can be interference-fitted. The arrangement of the moving component 13 makes this utility model portable, easy to use, and unaffected by the environment.

[0040] Preferably, the moving component 13 includes a locking component for locking the position of the moving component 13 to increase detection accuracy. Specifically, the locking component includes an adjusting bolt 131 passing through the mounting base 132, and the mounting base 132 has a threaded hole 1321 corresponding to the adjusting bolt 131. The adjusting bolt 131 locks the position of the moving component 13 by abutting against the platform of the supporting pulley 133. For example, multiple adjusting bolts 131 can be installed on one mounting base 132. In the locked state, the adjusting bolt 131 passes downward through the mounting base 132, and the thread of the adjusting bolt 131 abuts against the platform of the supporting pulley 133, thereby locking the position of the moving component 13. (See reference...) Figure 1The head of the adjusting bolt 131 is located above the mounting base 132. A locking nut 136 is also provided between the head of the adjusting bolt 131 and the mounting base 132. The locking nut 136 is threadedly engaged with the screw of the adjusting bolt 131. When the screw of the adjusting bolt 131 abuts against the platform of the support pulley 133, the locking nut 136 can be turned to make the locking nut 136 abut against the mounting base 132, thereby locking the position of the adjusting bolt 131.

[0041] As configured above, this invention supports the shaft to be tested 3 via the support unit 1, and the height of each support component 11 can be adjusted via the height adjustment component 12 to keep the shaft to be tested 3 horizontal. Furthermore, the rotating component 112 supporting the shaft to be tested 3 can rotate with the shaft to be tested 3, facilitating the measurement of shaft runout using the shaft runout measuring unit 2. This invention's shaft runout measuring device is convenient, flexible, and low-cost. It is not affected by location and can perform shaft runout measurement without a machine tool. It is particularly suitable for shaft runout testing of long shafts with different outer diameters. Under different environmental conditions, the long shaft can be freely adjusted to a horizontal state, resulting in high inspection efficiency and accurate and reliable test data, thus ensuring product quality.

[0042] It should be noted that references to "an embodiment," "an embodiment," "a specific embodiment," "some embodiments," etc., in the specification only indicate that the described embodiment may include a specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Additionally, when a specific feature, structure, or characteristic is described in conjunction with an embodiment, whether explicitly described or not, implementing such a feature, structure, or characteristic in conjunction with other embodiments is within the knowledge of those skilled in the art.

[0043] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0044] It should also be noted that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention without departing from the scope of the present invention, or equivalent embodiments can be modified based on the disclosed technical content. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the protection scope of the present invention.

[0045] It should also be understood that, unless otherwise specified or indicated, the terms “first,” “second,” “third,” etc., in the specification are used only to distinguish the various components, elements, and steps in the specification, and not to indicate the logical or sequential relationships between the various components, elements, and steps.

[0046] Furthermore, it should be recognized that the terminology described herein is used only to describe particular embodiments and not to limit the scope of the invention. It must be noted that the singular forms “a” and “an” used herein and in the appended claims include plural bases unless the context clearly indicates otherwise. For example, a reference to “a step” or “an apparatus” means a reference to one or more steps or apparatuses, and may include secondary steps and secondary apparatuses. All conjunctions used should be understood in the broadest sense. Also, the word “or” should be understood to have the definition of logical “or” rather than logical “exclusive OR”, unless the context clearly indicates otherwise. Furthermore, implementation of the methods and / or devices in embodiments of the invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. A shaft runout measuring device, characterized in that, include: At least two support units are provided, which are distributed along the axial direction of the shaft to be measured to jointly support the shaft to be measured, and all the support units are distributed along the axial direction of the shaft to be measured. Each support unit includes a support component and a height adjustment component. The height adjustment component is used to adjust the height of the support component so that the height of the support component of each support unit is the same. The support component includes a rotating member for supporting the shaft to be measured, and the rotating member can rotate with the shaft to be measured. A shaft runout measuring unit is used to contact the outer peripheral surface of the shaft to be measured in order to measure shaft runout.

2. The shaft runout measuring device as described in claim 1, characterized in that, One of the support components includes a support and two rotating members, the two rotating members being parallel to each other and mounted on the support, with space between the two rotating members for placing the shaft to be measured.

3. The shaft runout measuring device as described in claim 2, characterized in that, The rotating component includes a first shaft and a rotating element. The rotating element is sleeved on the first shaft. The outer peripheral surface of the rotating element is used to contact the outer peripheral surface of the shaft to be tested and can rotate with the shaft to be tested. The two ends of the first shaft are mounted on the support.

4. The shaft runout measuring device as described in claim 3, characterized in that, The support includes a base and two support frames. The two support frames are disposed on the base and are located at both ends of the first shaft. Each support frame is provided with at least one pair of positioning slots. Each positioning slot is used to accommodate one first shaft. The two positioning slots in a pair are at the same height so that the corresponding two first shafts are at the same height. The base is connected to the height adjustment component.

5. The shaft runout measuring device as described in claim 1, characterized in that, The shaft runout measuring device includes a level, which is used to ensure that the shaft to be measured is in a horizontal state.

6. The shaft runout measuring device as described in claim 1, characterized in that, The height adjustment assembly includes a hydraulic cylinder and a push rod, the push rod being driven by the hydraulic cylinder and connected to the support assembly to adjust the height of the support assembly.

7. The shaft runout measuring device as described in claim 1, characterized in that, The support unit further includes a moving component, which includes a mounting base and multiple pulleys. The height adjustment component is disposed on the mounting base, and the pulleys are mounted on the mounting base to drive the entire support unit to move.

8. The shaft runout measuring device as described in claim 7, characterized in that, The moving component includes a locking component for locking the position of the moving component.

9. The shaft runout measuring device as described in claim 8, characterized in that, The locking assembly includes an adjusting bolt passing through the mounting base, which locks the position of the movable assembly by abutting against the platform supporting the pulley.

10. The shaft runout measuring device as described in claim 1, characterized in that, The shaft runout measuring unit includes a bracket and a dial indicator, or a bracket and a micrometer indicator; the dial indicator or the micrometer indicator is mounted on the bracket and is used to contact the shaft to be measured to measure its shaft runout.

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