Eccentricity eliminating coupling device

Abstract

The utility model relates to an eccentric shaft coupling device which comprises a shaft coupling upper plate, a shaft coupling middle plate and a shaft coupling lower plate which are arranged from top to bottom. The center of the coupling upper plate is provided with a through hole for the driven shaft to pass through; the coupling upper plate and the coupling middle plate are connected with each other through a plurality of first coupling columns, and the coupling middle plate and the coupling lower plate are connected with each other through a plurality of second coupling columns; the multiple coupling columns are evenly distributed around the axial center line of the via hole in the circumferential direction. The coupling middle plate is provided with a groove hole suitable for the coupling column to penetrate through. The center of the coupling lower plate is provided with a through hole for the driving shaft to penetrate through. When the driving shaft rotates, the coupling upper plate and the coupling lower plate of the eccentricity-eliminating coupling device transmit rotation by means of the coupling column, and eccentricity generated by misalignment of the driving shaft and the driven shaft during connection and transmission is eliminated by means of translation of the coupling column in the slotted hole in the coupling middle plate. The problem of clamping stagnation caused by eccentricity in the transmission rotation process of the driving shaft and the driven shaft is solved.

Description

Technical Field

[0001] The utility model belongs to the field of transmission, and in particular relates to an eccentricity eliminating coupling device. Background Art

[0002] At present, the most commonly used coupling on precision instruments is the plum blossom coupling. This coupling has limited effect on eliminating the eccentricity between the motor shaft and the rotating shaft in precision measuring instruments, especially for instruments such as roundness meters and cylindricity meters. Due to the inherent disadvantages of their own hard connection, the vibration of the motor will be transmitted to the rotating table, resulting in the data measured by the probe not being the parameters of the workpiece itself; in addition, the non-concentricity between the motor shaft and the rotating shaft is magnified due to the hard connection, and the measured workpiece deviates from the rotation center due to the centrifugal effect, which will also cause the data measured by the probe not being the parameters of the workpiece itself. The above have a fatal impact on the function and performance of the instrument, thus posing a threat to product quality and causing some confusion to the inspection personnel. Utility Model Content

[0003] The utility model aims to provide an eccentricity-eliminating coupling device to overcome the above technical defects.

[0004] In order to solve the above technical problems, the utility model provides an eccentricity elimination coupling device, comprising a coupling upper plate, a coupling middle plate and a coupling lower plate arranged from top to bottom;

[0005] A through hole is provided at the center of the coupling upper plate for the driven shaft to pass through;

[0006] The coupling upper plate and the coupling middle plate are connected to each other through a plurality of first coupling columns, and the coupling middle plate and the coupling lower plate are connected to each other through a plurality of second coupling columns;

[0007] A plurality of coupling columns are evenly arranged in the circumferential direction around the axial center line of the through hole;

[0008] Wherein, a slot hole suitable for the coupling column to pass through is arranged on the coupling middle plate;

[0009] A through hole for the driving shaft to pass through is opened at the center of the coupling lower plate.

[0010] The coupling column includes:

[0011] The rod portion has a through threaded hole bored along its axial center;

[0012] The upper screw is screwed and inserted into the upper hole end of the through threaded hole;

[0013] The lower screw is screwed and inserted into the lower hole end of the through threaded hole;

[0014] Flange: The outer wall of the rod portion protrudes radially to form a flange.

[0015] The coupling middle plate is a disc-shaped structure with a through hole in the center;

[0016] Four slots are provided on the disc of the coupling middle plate;

[0017] The slots are oblong holes, and the long directions of the slots of all the oblong holes are perpendicular to the axial center line of the coupling middle plate.

[0018] The coupling upper plate is a disc-shaped structure, with a through hole in the center for the driven shaft to pass through;

[0019] Two first circular holes distributed at 180 degrees are opened on the disc of the coupling upper plate;

[0020] The upper screw of the first coupling column passes through the first circular hole and is then screwed into the through threaded hole, so that the coupling upper plate is clamped between the upper screw head and the flange of the first coupling column.

[0021] The coupling lower plate is a disc-shaped structure, with a through hole in the center for the driving shaft to pass through;

[0022] Two second circular holes distributed at 180 degrees are opened on the disc of the coupling lower plate;

[0023] The lower screw of the second coupling column passes through the second circular hole and is then screwed into the through threaded hole, so that the coupling lower plate is clamped between the lower screw head and the flange of the second coupling column.

[0024] The two first coupling columns and the two second coupling columns pass through the corresponding four slots on the coupling middle plate and are locked by upper screws or lower screws, so that the first coupling columns and the second coupling columns can move in the corresponding slots without leaving the coupling middle plate.

[0025] The thickness of the coupling upper plate and the coupling lower plate are the same or different;

[0026] The thickness of the coupling middle plate is smaller than the thickness of the coupling upper plate and the coupling lower plate.

[0027] The central through hole of the coupling upper plate extends circumferentially in a direction away from the coupling middle plate to form an upper sleeve for the driven shaft to pass through;

[0028] The driven shaft and the upper sleeve are fixed by fastening nails arranged in the radial direction.

[0029] The central through hole of the coupling lower plate extends circumferentially in a direction away from the coupling middle plate to form a lower sleeve for the driving shaft to pass through;

[0030] The driving shaft and the lower sleeve are fixed by fastening nails arranged in the radial direction.

[0031] The eccentricity eliminating coupling device proposed in the utility model is mainly composed of a coupling upper plate suitable for installing a driven shaft, a coupling lower plate suitable for installing a driving shaft, and a coupling middle plate arranged therebetween. Adjacent coupling plates are connected to each other through coupling columns. When the driving shaft rotates, the coupling upper plate and the coupling lower plate transmit rotation with the help of the coupling column. The coupling column is translated in a slot hole on the coupling middle plate to eliminate the eccentricity caused by the misalignment of the driving shaft and the driven shaft during connection and transmission, thereby solving the problem of the driving shaft and the driven shaft being stuck due to eccentricity during the transmission of rotation.

[0032] In order to make the above contents of the present invention more clearly understood, preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of an eccentricity-eliminating coupling device.

[0034] Figure 2 This is a structural diagram of the coupling upper plate and coupling column.

[0035] Figure 3 This is a structural diagram of the coupling middle plate and coupling column.

[0036] Figure 4 This is a structural diagram of the coupling lower plate and coupling column.

[0037] Description of reference numerals:

[0038] 100. Coupling upper plate; 110. Upper sleeve;

[0039] 200. Driven shaft;

[0040] 300. Coupling middle plate;

[0041] 410. First coupling column; 420. Second coupling column;

[0042] 500. Coupling lower plate; 510. Lower sleeve;

[0043] 600. Driving shaft. DETAILED DESCRIPTION

[0044] The following is an explanation of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0045] It should be noted that, in the present utility model, the upper, lower, left and right in the figure are regarded as the upper, lower, left and right of the eccentricity-eliminating coupling device described in this specification.

[0046] The exemplary embodiments of the present invention are now introduced with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0047] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0048] This embodiment relates to an eccentricity-eliminating coupling device, see Figure 1 The eccentricity elimination coupling device comprises a coupling upper plate 100, a coupling middle plate 300 and a coupling lower plate 500 arranged from top to bottom. It should be noted here that the arrangement of the three coupling plates can be Figure 1 The arrangement can be from top to bottom or from left to right, as long as the three coupling plates are parallel and stacked.

[0049] The structures of the coupling upper plate 100 and the coupling lower plate 500 are as follows:

[0050] (1) A through hole is provided in the center of the coupling upper plate 100 for the driven shaft 200 to pass through, and the driven shaft 200 is installed in the through hole. In order to make the connection between the driven shaft 200 and the coupling upper plate 100 more stable, as shown in FIG. Figure 1 As shown, the central through hole of the coupling upper plate 100 extends circumferentially in a direction away from the coupling middle plate 300 to form an upper sleeve 110 for the driven shaft 200 to pass through. Figure 2 As shown, the driven shaft 200 and the upper sleeve 110 are fixed by fastening nails arranged in the radial direction, so that the axial movement of the driven shaft 200 can be prevented or reduced, and the driven shaft 200 and the coupling upper plate 100 can be kept rotating as a whole as much as possible.

[0051] (2) The coupling lower plate 500 is a disc-shaped structure, and a through hole is opened in the center for the driving shaft 600 to pass through. The driving shaft 600 is installed in the through hole. In order to make the connection between the driving shaft 600 and the coupling lower plate 500 more stable, as shown in FIG. Figure 1 As shown, the central through hole of the coupling lower plate 500 extends circumferentially in a direction away from the coupling middle plate 300 to form a lower sleeve 510 for the driving shaft 600 to pass through. Figure 4As shown, the driving shaft 600 and the lower sleeve 510 are fixed by fastening nails arranged in the radial direction, so that the axial movement of the driving shaft 600 can be prevented or reduced, and the driving shaft 600 and the coupling lower plate 500 can be kept rotating as a whole as much as possible.

[0052] The three coupling plates form a rotatable device. Specifically, the coupling upper plate 100 and the coupling middle plate 300 are connected to each other through a plurality of first coupling columns 410, and the coupling middle plate 300 and the coupling lower plate 500 are connected to each other through a plurality of second coupling columns 420. Figure 1 When the driving shaft 600 rotates, the coupling upper plate 100 and the coupling lower plate 500 transmit rotation with the help of the coupling column, that is, the driving shaft 600 drives the coupling upper plate 100 to rotate, and the coupling upper plate 100 transmits the rotational force to the coupling middle plate 300 through multiple second coupling columns 420, and the coupling middle plate 300 continues to transmit the rotational force to the coupling upper plate 100 through multiple first coupling columns 410, and the coupling upper plate 100 drives the driven shaft 200 to rotate, and now the power transmission is completed.

[0053] Multiple coupling columns are evenly arranged circumferentially around the axial center line of the through hole. It should be noted here that during installation, the center lines of the through holes of the coupling upper plate 100 and the coupling lower plate 500 coincide with each other. Therefore, multiple coupling columns are evenly arranged circumferentially around the axial center line of any through hole. The aforementioned coupling columns refer to the first coupling column 410 and the second coupling column 420.

[0054] Among them, a slot hole suitable for the coupling column to pass through is set on the coupling middle plate 300. Figure 1 and Figure 3 The coupling middle plate 300 is a disc-shaped structure with a through hole in the center. The axial center line of the through hole coincides with the through hole center lines of the coupling upper plate 100 and the coupling lower plate 500. The design of the through hole can reduce the weight of the coupling middle plate 300 to reduce energy loss in the process of transmitting power. In addition, for the same purpose, in this embodiment, the thickness of the coupling middle plate 300 is smaller than the thickness of the coupling upper plate 100 and the coupling lower plate 500.

[0055] The thickness of the coupling upper plate 100 and the coupling lower plate 500 may be the same or different. However, in order to ensure the consistency of the rotation speed, in this embodiment, the thickness of the coupling upper plate 100 and the coupling lower plate 500 are the same.

[0056] In this embodiment, reference Figure 3 Four slots are provided on the disc of the coupling middle plate 300. The slots are oblong holes. The long directions of the slots of all the oblong holes are perpendicular to the axial center line of the coupling middle plate 300. That is, the coupling middle plate 300 has a slot at four angles, namely, 0 degrees, 90 degrees, 180 degrees, and 270 degrees.

[0057] A coupling column is installed in each slot, and the coupling column can move frictionlessly in the slot on the coupling middle plate 300. That is to say, in this embodiment, a total of four coupling columns are provided, but in actual applications, the number and position of the coupling columns can be adjusted, and the specific number and position are not limited.

[0058] like Figure 1 As shown, the coupling column includes:

[0059] The rod portion has a through threaded hole bored along its axial center.

[0060] The upper screw is screwed and inserted into the upper hole end of the through threaded hole.

[0061] The lower screw is screwed and inserted into the lower hole end of the through threaded hole.

[0062] Flange: The outer wall of the rod portion protrudes radially to form a flange.

[0063] according to Figure 1 It can be seen that the flange is not set at the midpoint of the rod, but at a position close to one end of the through threaded hole. If the part close to the flange is defined as the upper screw, then the part far from the flange is the lower screw, but this will be inconsistent with Figure 1 Therefore, in this embodiment, the definition Figure 1 The up, down, left and right in the text shall be deemed as the up, down, left and right of the eccentric-eliminating coupling device in this manual.

[0064] Combination Figure 1 and Figure 2 It can be seen that the coupling upper plate 100 is a disc-shaped structure with a through hole in the center for the driven shaft 200 to pass through. Two first circular holes distributed 180 degrees are opened on the disc of the coupling upper plate 100, and the two first circular holes are opposite to the 0-degree slot hole and the 180-degree slot hole on the coupling middle plate 300.

[0065] The upper screw of the first coupling column 410 passes through the first circular hole and is screwed into the through threaded hole, so that the coupling upper plate 100 is clamped between the upper screw head and the flange of the first coupling column 410. At this point, the first coupling column 410 and the coupling upper plate 100 are connected as a whole.

[0066] Combination Figure 1 and Figure 4 It can be seen that two second circular holes distributed at 180 degrees are opened on the disc of the coupling lower plate 500 , and the two second circular holes are directly opposite to the 90-degree slot hole and the 270-degree slot hole on the coupling middle plate 300 .

[0067] The lower screw of the second coupling column 420 passes through the second circular hole and is screwed into the through threaded hole, so that the coupling lower plate 500 is clamped between the lower screw head and the flange of the second coupling column 420. At this point, the second coupling column 420 and the coupling lower plate 500 are connected as one.

[0068] The two first coupling columns 410 and the two second coupling columns 420 pass through the corresponding four slots on the coupling middle plate 300 and are locked by upper screws or lower screws, so that the first coupling columns 410 and the second coupling columns 420 can move in the corresponding slots without separating from the coupling middle plate 300.

[0069] According to the above, the coupling middle plate 300 is not fixed to the coupling column, and the coupling column can move in the slot of the coupling middle plate 300. There are 4 coupling columns in total, which are in pairs. The two coupling columns in a pair are two points on a straight line formed, and two mutually perpendicular lines can be formed to form the X-axis and the Y-axis.

[0070] The working principle of the eccentricity elimination coupling device is as follows:

[0071] If the central through hole of the coupling upper plate 100 is defined as the central origin of the coordinate system composed of the X-axis and the Y-axis, and the axial centerline of the central through hole is the Z-axis, then the central through hole of the coupling lower plate 500 is the point in this coordinate system. To make the driven shaft 200 and the driving shaft 600 concentric, it is necessary to eliminate the horizontal distance between the point in the coordinate system and the Z-axis. In order to eliminate the horizontal distance between the point in the coordinate system and the Z-axis, it is necessary to change the coordinates of the point, that is, adjust the position of the central through hole of the coupling upper plate 100 so that it coincides with the Z-axis. If the coupling middle plate 300 moves along the X-axis under the action of the coupling upper plate 100 and the first coupling column 410, then the coupling lower plate 500 will move along the Y-axis under the action of the coupling middle plate 300 and the second coupling column 420, so that the position of the central through hole of the coupling lower plate 500 changes.

[0072] The eccentricity elimination coupling device provided by the utility model is applied to the transmission structure, and is particularly suitable for the eccentricity elimination requirements of precision instruments, such as gear measuring centers, roundness-waviness measuring instruments, cylindricity measuring instruments and other high-precision instrument measurement systems. The following will take the Y901200D roundness-waviness instrument as an example to illustrate the application process of the eccentricity elimination coupling device:

[0073] The driving shaft 600 is the motor shaft of the Y901200D roundness and waviness meter, and serves as the drive of the entire instrument spindle system. The driven shaft 200 is the rotating spindle of the Y901200D roundness and waviness meter. Because the rotating spindle of the roundness and waviness and the motor shaft are not aligned during assembly, and there is a distance between the axes, there is eccentricity. In order to eliminate the eccentricity, the motor can be started, and the motor shaft, i.e., the driving shaft 600, starts to rotate, driving the coupling lower plate 500 to rotate, and the second coupling column 420 fixed on the coupling lower plate 500 also starts to rotate. Due to the eccentricity, the second coupling column 420 will be driven toward the center of the circle formed by the rotation, and will translate along the slot on the plate under the restriction of the coupling middle plate 300 to approach the center of rotation, as shown in FIG. Figure 3 shown.

[0074] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. The eccentricity-eliminating coupling device is characterized in that: It comprises a coupling upper plate (100), a coupling middle plate (300) and a coupling lower plate (500) arranged from top to bottom; A through hole for the driven shaft (200) to pass through is provided at the center of the coupling upper plate (100); The coupling upper plate (100) and the coupling middle plate (300) are connected to each other via a plurality of first coupling columns (410), and the coupling middle plate (300) and the coupling lower plate (500) are connected to each other via a plurality of second coupling columns (420); A plurality of coupling columns are evenly arranged circumferentially around the axial center line of the through hole; Wherein, a slot hole suitable for the coupling column to pass through is provided on the coupling middle plate (300); A through hole for the driving shaft (600) to pass through is provided at the center of the coupling lower plate (500).

2. The eccentricity elimination coupling device according to claim 1, characterized in that: The coupling column comprises: The rod portion has a through threaded hole bored along its axial center; An upper screw is screwed and inserted into the upper hole end of the through threaded hole; A lower screw is screwed and inserted into the lower hole end of the through threaded hole; The outer wall of the rod portion protrudes radially to form a flange.

3. The eccentricity elimination coupling device according to claim 2, characterized in that: The coupling middle plate (300) is a disc-shaped structure with a through hole at its center; Four slots are provided on the disc of the coupling middle plate (300); The slotted holes are oblong holes, and the long directions of the slotted holes of all the oblong holes point perpendicularly to the axial centerline of the coupling middle plate (300).

4. The eccentricity elimination coupling device according to claim 3, characterized in that: The coupling upper plate (100) is a disc-shaped structure, and a through hole is provided at the center thereof for the driven shaft (200) to pass through; Two first circular holes distributed at 180 degrees are opened on the circular disc of the coupling upper plate (100); The upper screw of the first coupling column (410) passes through the first circular hole and is screwed into the through threaded hole, so that the coupling upper plate (100) is clamped between the upper screw head and the flange of the first coupling column (410).

5. The eccentricity elimination coupling device according to claim 3, characterized in that: The coupling lower plate (500) is a disc-shaped structure, with a through hole at its center for the driving shaft (600) to pass through; Two second circular holes distributed at 180 degrees are opened on the circular disk of the coupling lower plate (500); The lower screw of the second coupling column (420) passes through the second circular hole and is screwed into the through threaded hole, so that the coupling lower plate (500) is clamped between the lower screw head and the flange of the second coupling column (420).

6. The eccentricity-eliminating coupling device according to claim 4 or 5, characterized in that: The two first coupling columns (410) and the two second coupling columns (420) are passed through the corresponding four slot holes on the coupling middle plate (300) and are then locked by upper screws or lower screws, so that the first coupling columns (410) and the second coupling columns (420) can move in the corresponding slot holes without being separated from the coupling middle plate (300).

7. The eccentricity-eliminating coupling device according to claim 4 or 5, characterized in that: The thickness of the coupling upper plate (100) and the coupling lower plate (500) are the same or different; The thickness of the coupling middle plate (300) is respectively smaller than the thickness of the coupling upper plate (100) and the coupling lower plate (500).

8. The eccentricity-eliminating coupling device according to claim 4, characterized in that: The central through hole of the coupling upper plate (100) extends circumferentially in a direction away from the coupling middle plate (300) to form an upper sleeve (110) for allowing the driven shaft (200) to pass through; The driven shaft (200) and the upper sleeve (110) are fixed via fastening pins arranged in the radial direction.

9. The eccentricity-eliminating coupling device according to claim 5, characterized in that: The central through hole of the coupling lower plate (500) extends circumferentially in a direction away from the coupling middle plate (300) to form a lower sleeve (510) for allowing the driving shaft (600) to pass through; The driving shaft (600) and the lower sleeve (510) are fixed by fastening nails arranged in the radial direction.

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