A reducer output shaft concentricity calibration fixture

Abstract

The present application relates to concentricity calibration technical field, disclose a kind of reducer output shaft concentricity calibration fixture, including two groups of interval distribution installation ring pipe and array distribution in the outside of two groups of installation ring pipe telescopic pneumatic cylinder, the inside of the installation ring pipe is triangular array and is provided with the clamping assembly of the output shaft calibration by three-jaw chucking, the outside of three groups of the clamping assembly is provided with the driving assembly for providing power for clamping assembly, the outside of the installation ring pipe is triangular array and is provided with sleeve slot, the installation ring pipe is sleeved with clamping assembly by sleeve slot, the structure of the sleeve slot and the clamping assembly of the clamping groove of the outside of the device by installation ring pipe are opened, so that driving assembly and clamping assembly can be conveniently disassembled and maintained;The combination of telescopic pneumatic cylinder and link shaft guarantees the stability of spacing adjustment, and simplifies the structural complexity;Fixture is not only efficient and convenient in operation, also save time and effort in maintenance.

Description

Technical Field

[0001] This invention relates to the field of concentricity calibration technology, specifically to a concentricity calibration fixture for the output shaft of a speed reducer. Background Technology

[0002] As a key component in industrial transmission systems, the concentricity accuracy of the output shaft of a speed reducer has a decisive impact on the overall operational stability, transmission efficiency, and service life of the equipment. During the manufacturing, assembly, and long-term operation of the speed reducer, the output shaft is prone to concentricity deviations such as radial runout or axial misalignment due to factors such as residual material stress, machining errors, accumulated assembly tolerances, or uneven load. If these deviations are not calibrated in time, they will not only aggravate the vibration and noise of the transmission system, but also lead to premature wear of bearings, seals, and other related components, and even cause serious consequences such as equipment downtime, causing great inconvenience to continuous production.

[0003] Currently, common methods for calibrating the concentricity of output shafts in industrial settings include manual inspection using fixed fixtures and dial indicators, or local correction using split-type roller straightening devices. However, these traditional methods have several limitations: First, most fixtures have a simple structure and fixed dimensions, and can only be used for shafts of specific models or size ranges. When dealing with output shafts of different diameters and lengths, it is necessary to change the corresponding fixtures or repeatedly adjust them using shims, modules, and other auxiliary tools. This process is cumbersome and time-consuming, making it difficult to adapt to the flexible production needs of multi-variety, small-batch production. Second, the calibration process usually requires transferring the shaft between multiple devices or workstations. For example, the deviation position and value are first measured on the inspection table, and then it is moved to the straightening equipment for correction. This not only increases the risk of repeated positioning errors, but also may cause secondary damage to the shaft surface due to accidental bumps during hoisting and handling.

[0004] For example, the Chinese invention patent (application number: CN202310930057.0) discloses a "drive shaft concentricity detection and calibration device," which states that a drive shaft is a high-speed, low-support rotating body, making its dynamic balance crucial. Drive shafts are generally inspected before leaving the factory, and those that fail inspection are effectively calibrated. However, most existing drive shaft concentricity calibration devices primarily use raised-grinding calibration devices, while bending concentricity calibration uses roller pressing. Changing between these two devices requires moving the drive shaft, thus reducing production efficiency. Therefore, it is necessary to provide a drive shaft concentricity detection and calibration device to solve the problems mentioned in the background. The aforementioned patent demonstrates the deficiencies of the existing technology; therefore, we propose a reducer output shaft concentricity calibration fixture. Summary of the Invention

[0005] The purpose of this invention is to provide a speed reducer output shaft concentricity calibration fixture to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gearbox output shaft concentricity calibration fixture, comprising two sets of spaced mounting ring tubes and telescopic cylinders arrayed on the outer sides of the two sets of mounting ring tubes. The inner side of the mounting ring tubes is provided with a triangular array of clamping components that achieve output shaft calibration by three-jaw clamping. The outer sides of the three sets of clamping components are provided with driving components for providing power to the clamping components. The outer side of the mounting ring tubes is provided with a triangular array of sleeve grooves, and the mounting ring tubes are sleeved with the clamping components through the sleeve grooves.

[0007] Preferably, the drive assembly includes a ring gear disposed inside the mounting ring tube, the ring gear being an internal gear, and the inner side of the ring gear meshing with the clamping assembly, and the outer side of the ring gear having external teeth evenly distributed.

[0008] Preferably, a ring plate is fixedly installed on one side of the ring gear, and an inwardly recessed groove is provided on the inner side of the mounting ring tube, and the inner side of the mounting ring tube is engaged with the outer side of the ring plate through the groove.

[0009] Preferably, the side wall of the mounting ring tube is provided with a side groove, a servo motor is fixedly installed on the outside of the mounting ring tube, and a transmission gear is fixedly installed on the output end of the servo motor. The outside of the transmission gear extends through the side groove to the inside of the mounting ring tube, and the transmission gear meshes with the external teeth.

[0010] Preferably, the clamping assembly includes a rotating gear array arranged inside the mounting ring tube, the rotating gear meshing with the ring gear, one end of the rotating gear having an inwardly extending connecting groove, the connecting groove being T-shaped, and the rotating gear rotatably connecting to a connecting shaft through the connecting groove.

[0011] Preferably, a mounting plate is fixedly installed at one end of the connecting shaft located outside the rotating gear, and the top of the mounting plate is fixedly connected to the inner side of the mounting ring tube.

[0012] Preferably, an extension shaft is fixedly installed at the other end of the rotating gear. A central groove is pre-set in the middle of the extension shaft, and the central groove is T-shaped. The extension shaft is rotatably connected to a connecting shaft through the central groove. A side plate is fixedly installed at the end of the connecting shaft away from the mounting plate.

[0013] Preferably, a torsion spring is fixedly installed on the outer side of the connecting shaft, and the connecting shaft is connected to the inner wall of the extension shaft through the torsion spring.

[0014] Preferably, an arc plate is fixedly installed on the outer side of the side plate, and clamping shafts of different sizes are sequentially installed on the inner side of the arc plate, and the clamping shafts are fixedly connected to each other.

[0015] Preferably, the telescopic cylinder is inclined, and both ends of the telescopic cylinder are rotatably sleeved with connecting shafts. The connecting shafts are distributed perpendicularly to the telescopic cylinder, and the two sets of connecting shafts are respectively fixedly connected to the outer walls of the two sets of mounting ring tubes.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. A flexible and adjustable clamping frame is constructed by two sets of spaced mounting ring tubes and telescopic cylinders arranged in an array on their outer sides. The telescopic cylinders are tilted and rotatably connected to the outer wall of the mounting ring tubes through connecting shafts at both ends, allowing the spacing between the two sets of mounting ring tubes to be steplessly adjusted according to the length of the output shaft being tested. This enables the system to adapt to shafts of different specifications. Furthermore, by changing the clamping position during the testing process, the concentricity of multiple cross-sections of the shaft can be continuously tested, greatly improving the versatility and testing efficiency of the equipment and avoiding the hassle of frequently changing tooling due to changes in shaft size.

[0018] 2. The coordinated operation of the drive assembly and the clamping assembly achieves precise clamping force control and motion synchronization. The drive assembly uses a servo motor as its power source, and through the meshing of the transmission gear with the outer teeth of the ring gear, it drives the ring gear to rotate smoothly within the mounting ring tube. The ring gear, as the internal gear, meshes with three sets of rotating gears arranged in a triangular array on its inner side, ensuring synchronous radial movement of the three clamping points. This transmission chain has a compact structure and reliable power transmission, effectively avoiding shaft misalignment or surface damage caused by asynchronous clamping, providing a fundamental guarantee for high-precision calibration.

[0019] 3. The rotating gear is connected to the mounting plate via a connecting shaft and can rotate around a fixed axis under the drive of the ring gear. The extension shaft at the other end of the rotating gear is sleeved with the connecting shaft via a T-shaped central groove and elastically connected by a torsion spring. This structure gives the connecting shaft and the side plate and arc plate fixed at its end a certain radial floating capability, which can automatically adjust the contact angle and clamping force according to the actual contour of the output shaft. Multiple clamping shafts are provided on the inner side of the arc plate, which can evenly distribute the clamping stress and prevent local overload. At the same time, the angle sensor integrated on the arc plate can collect the rotation angle of each clamping point in real time. Through the fusion analysis of multiple sets of data, the concentricity deviation of the output shaft can be accurately calculated. After detecting the deviation, it can automatically switch to the calibration mode. By controlling the further rotation of the arc plate, the clamping shaft applies directional pressure to the shaft body. Combined with the rotation of the shaft body, efficient and non-destructive concentricity correction is achieved.

[0020] 4. The sleeve groove on the outside of the mounting ring and the slot structure on the inside allow for easy disassembly and maintenance of both the drive assembly and the clamping assembly; the combination of the telescopic cylinder and the connecting shaft ensures the stability of the spacing adjustment and simplifies the structural complexity; the clamp is not only efficient and convenient to operate, but also saves time and effort in maintenance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a fixture for calibrating the concentricity of the output shaft of a speed reducer.

[0022] Figure 2 This is a side view of the structure of the present invention;

[0023] Figure 3 This is an exploded view of the internal structure of the mounting ring tube of the present invention;

[0024] Figure 4 This is a cross-sectional view of the internal structure of the mounting ring tube of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the clamping assembly of the present invention;

[0026] Figure 6 This is an exploded view of the clamping assembly of the present invention;

[0027] Figure 7 This is a cross-sectional view of the connection structure of the extension shaft of the present invention.

[0028] In the diagram: 1. Installing ring pipe; 2. Telescopic cylinder; 3. Connecting shaft;

[0029] 4. Drive components; 401. Ring gear; 402. External gear; 403. Ring plate; 404. Slot; 405. Servo motor; 406. Transmission gear; 407. Side groove;

[0030] 5. Clamping assembly; 501. Mounting plate; 502. Rotating gear; 503. Connecting shaft; 504. Connecting groove; 505. Extension shaft; 506. Side plate; 507. Connecting shaft; 508. Torsion spring; 509. Arc plate; 510. Clamping shaft;

[0031] 6. Socket groove. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1 - Figure 7 As shown, the present invention provides a technical solution: a gear reducer output shaft concentricity calibration fixture, including two sets of spaced mounting ring tubes 1 and telescopic cylinders 2 arrayed on the outside of the two sets of mounting ring tubes 1. The inner side of the mounting ring tubes 1 is arranged in a triangular array with clamping components 5 that achieve output shaft calibration by three-jaw clamping. The outer side of the three sets of clamping components 5 is provided with driving components 4 for providing power to the clamping components 5. The outer side of the mounting ring tubes 1 is provided with a sleeve groove 6 in a triangular array, and the mounting ring tubes 1 are sleeved with the clamping components 5 through the sleeve groove 6.

[0034] A flexibly adjustable clamping frame is constructed by two sets of spaced mounting ring tubes 1 and telescopic cylinders 2 arranged in an array on their outer sides. The telescopic cylinders 2 are tilted and are rotatably connected to the outer wall of the mounting ring tubes 1 through connecting shafts 3 at both ends. This allows the distance between the two sets of mounting ring tubes 1 to be steplessly adjusted according to the length of the output shaft being tested. This enables the system to adapt to shafts of different specifications. Furthermore, by changing the clamping position during the testing process, the concentricity of multiple cross-sections of the shaft can be continuously tested, greatly improving the versatility and testing efficiency of the equipment and avoiding the trouble of frequently changing tooling due to changes in shaft size.

[0035] Furthermore, such as Figure 3 and Figure 4 The drive assembly 4 includes a ring gear 401 disposed inside the mounting ring tube 1. The ring gear 401 is an internal gear, and the inner side of the ring gear 401 meshes with the clamping assembly 5. External teeth 402 are evenly distributed on the outer side of the ring gear 401.

[0036] Furthermore, a ring plate 403 is fixedly installed on one side of the ring gear 401, and an inwardly recessed groove 404 is provided on the inner side of the mounting ring tube 1. The inner side of the mounting ring tube 1 is engaged with the outer side of the ring plate 403 through the groove 404.

[0037] Furthermore, a side groove 407 is provided through the side wall of the mounting ring tube 1, a servo motor 405 is fixedly installed on the outside of the mounting ring tube 1, and a transmission gear 406 is fixedly installed at the output end of the servo motor 405. The outside of the transmission gear 406 extends through the side groove 407 to the inside of the mounting ring tube 1, and the transmission gear 406 meshes with the external teeth 402.

[0038] In use, the servo motor 405 installed on the outside of the mounting ring tube 1 needs to be started first. The servo motor 405 and the transmission gear 406 fixedly installed at its output end drive the external tooth 402 meshing with the transmission gear 406 to rotate, thereby driving the ring gear 401 fixedly connected to the external tooth 402 to rotate, and then the rotating ring gear 401 provides power support for the clamping assembly 5 meshing with its inner side.

[0039] In the preferred embodiment of this technical solution, please refer to Figure 5 , Figure 6 and Figure 7 As shown, the clamping assembly 5 includes a rotating gear 502 arrayed inside the mounting ring tube 1. The rotating gear 502 meshes with the ring gear 401. One end of the rotating gear 502 is provided with an inwardly extending connecting groove 504. The connecting groove 504 is T-shaped. The rotating gear 502 is rotatably sleeved with the connecting shaft 503 through the connecting groove 504.

[0040] After the spacing is adjusted, the servo motor 405 fixed to the outside of the mounting ring tube 1 is started. The output end of the servo motor 405 drives the transmission gear 406 to rotate. The transmission gear 406 extends into the inside through the side groove 407 of the side wall of the mounting ring tube 1 and meshes with the external teeth 402 evenly distributed on the outside of the ring gear 401, thereby driving the ring gear 401 to rotate inside the mounting ring tube 1.

[0041] The ring gear 401 engages with the slot 404 inside the mounting ring tube 1 via the ring plate 403 on one side, ensuring stable rotation. As the core of the drive assembly 4, the ring gear 401 acts as an internal gear, meshing with the rotating gears 502 in the clamping assembly 5 arranged in a triangular array. The rotation of the ring gear 401 synchronously drives the three rotating gears 502 to rotate around their respective fixed connecting shafts 503, achieving precise and synchronous power distribution to the three clamping points.

[0042] Furthermore, a mounting plate 501 is fixedly installed on one end of the connecting shaft 503 located outside the rotating gear 502, and the top of the mounting plate 501 is fixedly connected to the inner side of the mounting ring tube 1.

[0043] Furthermore, an extension shaft 505 is fixedly installed at the other end of the rotating gear 502. A central groove is pre-set in the middle of the extension shaft 505, and the central groove is T-shaped. The extension shaft 505 is rotatably sleeved with a connecting shaft 507 through the central groove. A side plate 506 is fixedly installed at the end of the connecting shaft 507 away from the mounting plate 501.

[0044] Furthermore, a torsion spring 508 is fixedly installed on the outer side of the connecting shaft 507. The connecting shaft 507 is connected to the inner wall of the extension shaft 505 through the torsion spring 508. The torsion spring 508 facilitates the reset of the connecting shaft 507 and allows the three sets of arc plates 509 to rotate at different angles.

[0045] Furthermore, an arc plate 509 is fixedly installed on the outer side of the side plate 506, and clamping shafts 510 of different sizes are sequentially installed on the inner side of the arc plate 509, and the clamping shafts 510 are fixedly connected to each other.

[0046] The rotational motion of the rotating gear 502 is transmitted through an extension shaft 505 fixedly mounted at one end. The extension shaft 505 is rotatably sleeved with a connecting shaft 507 via its T-shaped central groove, and the connecting shaft 507 is connected to the inner wall of the extension shaft 505 via a torsion spring 508. This structure allows the connecting shaft 507, the side plate 506 fixed to its end, and the arc plate 509 to have radial floating capability. In detection mode, the three sets of arc plates 509 synchronously move centripetally to contact the output shaft. The clamping shaft 510 inside the arc plate 509 conforms to the shaft surface, and the angle is adaptively fine-tuned by the torsion spring 508 due to differences in shaft contour. An angle sensor integrated on the arc plate 509 collects three sets of angle data in real time to calculate the concentricity deviation.

[0047] In use, the rotation of the ring gear 401 first drives the rotating gear 502, which meshes with the inner side of the ring gear 401, to rotate around the connecting shaft 503. This rotating gear 502 then drives the extension shaft 505 at one end to rotate. When the extension shaft 505 rotates, it drives the side plate 506 to rotate via the internally rotated connecting shaft 507 and torsion spring 508. The rotation of the side plate 506 drives the arc plate 509, which is fixedly mounted on its outer side, to rotate. The outer side of the arc plate 509 then contacts the output shaft. An angle sensor preset on the outer side of the arc plate 509 detects the rotation angle of the arc plate 509, and the output shaft is determined based on the detected multiple angles. The concentricity of the output shaft is checked to achieve calibration. When a problem is detected in the concentricity of the output shaft, the output shaft can be removed first. Then, the ring gear 401 is continuously rotated, causing the ring gear 401 to drive the arc plate 509 to rotate continuously until it rotates to the inside of the sleeve groove 6. At this time, the output shaft of the reducer is inserted into the inside of the two sets of mounting ring tubes 1. Then, the ring gear 401 is started in reverse, causing the arc plate 509 to drive the clamping shaft 510 fixedly installed inside it to rotate in the opposite direction. The clamping shaft 510 clamps the output shaft. The reducer drives the output shaft to rotate, and in combination with the clamping of the three sets of clamping shafts 510, the output shaft of the reducer is calibrated.

[0048] In the preferred embodiment of this technical solution, please refer to Figure 2 As shown, the telescopic cylinder 2 is inclined, and both ends of the telescopic cylinder 2 are rotatably connected to the connecting shaft 3. The connecting shaft 3 is perpendicular to the telescopic cylinder 2, and the two sets of connecting shaft 3 are respectively fixedly connected to the outer wall of the two sets of mounting ring pipes 1.

[0049] First, based on the length of the output shaft to be calibrated, the telescopic cylinders 2 distributed on the outside of the two sets of mounting ring tubes 1 are activated. Since the telescopic cylinders 2 are connected to the outer wall of the mounting ring tubes 1 through the connecting shafts 3 at both ends, their inclined structure allows their telescopic movement to smoothly and accurately adjust the distance between the two sets of mounting ring tubes 1, so that the fixture can be adapted to shafts of different sizes and is ready to detect the concentricity of different positions of the shaft.

[0050] In use, the telescopic cylinder 2 extends and retracts, and in conjunction with the connecting shaft 3 that rotates at both ends, it is easy to change the distance between the two sets of mounting ring tubes 1, thereby adapting to output shafts of different sizes. At the same time, during testing, the concentricity of different positions of the shaft can be detected by changing the distance.

[0051] 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.

[0052] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concentricity calibration fixture for the output shaft of a speed reducer, comprising two sets of spaced mounting ring tubes (1) and telescopic cylinders (2) arrayed outside the two sets of mounting ring tubes (1), characterized in that: The inner side of the mounting ring tube (1) is provided with a triangular array of clamping components (5) for output shaft calibration by three-jaw clamping. The outer sides of the three sets of clamping components (5) are provided with driving components (4) for providing power to the clamping components (5). The outer side of the mounting ring tube (1) is provided with a triangular array of socket grooves (6). The mounting ring tube (1) is sleeved with the clamping components (5) through the socket grooves (6). The drive assembly (4) includes a ring gear (401) disposed inside the mounting ring tube (1), and the clamping assembly (5) includes a rotating gear (502) arranged in an array inside the mounting ring tube (1). The rotating gear (502) meshes with the ring gear (401). One end of the rotating gear (502) is provided with an inwardly extending connecting groove (504). The connecting groove (504) is T-shaped. The rotating gear (502) is rotatably sleeved with a connecting shaft (503) through the connecting groove (504). The connecting shaft (503) is fixedly mounted with a mounting plate (501) at one end outside the rotating gear (502), and the top of the mounting plate (501) is fixedly connected to the inner side of the mounting ring tube (1). An extension shaft (505) is fixedly installed at the other end of the rotating gear (502). A central groove is pre-set in the middle of the extension shaft (505). A connecting shaft (507) is rotatably sleeved on the extension shaft (505) through the central groove. A side plate (506) is fixedly installed at the end of the connecting shaft (507) away from the mounting plate (501). A torsion spring (508) is fixedly installed on the outside of the connecting shaft (507), and the connecting shaft (507) is connected to the inner wall of the extension shaft (505) through the torsion spring (508). An arc plate (509) is fixedly installed on the outer side of the side plate (506). Clamping shafts (510) of different sizes are sequentially installed on the inner side of the arc plate (509), and the clamping shafts (510) are fixedly connected to each other. The rotation angle of the arc plate (509) is detected by a preset angle sensor on the outer side of the arc plate (509).

2. The gearbox output shaft concentricity calibration fixture according to claim 1, characterized in that: The inner side of the ring gear (401) meshes with the clamping assembly (5), and the outer side of the ring gear (401) is evenly distributed with external teeth (402).

3. A speed reducer output shaft concentricity calibration fixture according to claim 2, characterized in that: A ring plate (403) is fixedly installed on one side of the ring gear (401), and an inwardly recessed groove (404) is provided on the inner side of the mounting ring tube (1). The inner side of the mounting ring tube (1) is engaged with the outer side of the ring plate (403) through the groove (404).

4. A speed reducer output shaft concentricity calibration fixture according to claim 3, characterized in that: The side wall of the mounting ring tube (1) is provided with a side groove (407). A servo motor (405) is fixedly installed on the outside of the mounting ring tube (1), and a transmission gear (406) is fixedly installed at the output end of the servo motor (405), and the transmission gear (406) meshes with the external teeth (402).

5. A speed reducer output shaft concentricity calibration fixture according to claim 1, characterized in that: The telescopic cylinder (2) is inclined, and both ends of the telescopic cylinder (2) are rotatably sleeved with connecting shafts (3). The two sets of connecting shafts (3) are respectively fixedly connected to the outer walls of the two sets of mounting ring pipes (1).

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