A coupling capable of clamping shafts of different diameters while maintaining a constant moment of inertia.

Abstract

This invention relates to the field of mechanical transmission technology, providing a coupling capable of clamping shafts of different diameters while maintaining a constant moment of inertia. The coupling includes an upper jaw adjustment mechanism, a middle moment of inertia compensation mechanism, and a lower jaw adjustment mechanism. The upper jaw adjustment mechanism comprises a first chuck, a first planar gear ring, and multiple adjustment units. The first planar gear ring is fitted around the outside of the first chuck. The multiple adjustment units are evenly distributed along the circumference of the first chuck, with each adjustment unit located radially from the first chuck. Each adjustment unit includes a first bevel gear, a first worm gear, and a jaw. The first bevel gear meshes with the first planar gear ring. The first bevel gear is rigidly connected to the first worm gear. The jaw has a threaded hole, through which the first worm gear passes, and meshes with the threaded hole of the jaw. This invention can clamp shafts of different diameters while ensuring that its moment of inertia remains constant when clamping shafts of different diameters.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission technology, and in particular to a coupling that can clamp shafts of different diameters while maintaining a constant moment of inertia. Background Technology

[0002] In the field of modern mechanical engineering, couplings, as important components that connect two shafts to transmit torque and motion, are widely used in various mechanical equipment.

[0003] Currently, most common couplings on the market can only accommodate connections of specific shaft diameters. When connecting shafts of different diameters, it is often necessary to replace them with couplings of different specifications. This not only increases costs but also reduces the versatility and installation efficiency of the equipment. Furthermore, in applications with strict requirements for rotational inertia, such as high-precision CNC machine tools and robots, the rotational inertia changes when connecting shafts of different diameters using traditional couplings due to disassembly and replacement of the coupling, thereby affecting the dynamic performance and accuracy of the equipment.

[0004] With the continuous improvement of industrial automation, the requirements for the versatility, stability, and precision of mechanical transmission systems are also increasing. Therefore, developing a coupling that can clamp shafts of different diameters while maintaining a constant moment of inertia has become an urgent problem to be solved in the field of mechanical engineering. Summary of the Invention

[0005] This invention primarily addresses the technical problems of traditional couplings requiring frequent replacement when facing connection needs with different shaft diameters, and the alteration of rotational inertia caused by replacing or disassembling couplings in application scenarios with strict requirements for rotational inertia. It proposes a coupling capable of clamping shafts of different diameters while maintaining a constant rotational inertia, thus clamping shafts of varying diameters and ensuring that its own rotational inertia remains unchanged when clamping shafts of different diameters.

[0006] The present invention provides a coupling that can clamp different shaft diameters and has a constant moment of inertia, including an upper jaw adjustment mechanism, a middle moment of inertia compensation mechanism and a lower jaw adjustment mechanism;

[0007] The upper jaw adjustment mechanism, the middle moment of inertia compensation mechanism, and the lower jaw adjustment mechanism are arranged concentrically;

[0008] The upper jaw adjustment mechanism and the lower jaw adjustment mechanism have the same structure, each including: a first chuck, a first planar toothed ring, and multiple adjustment units;

[0009] The first planar toothed ring is fitted onto the outside of the first chuck;

[0010] Multiple adjustment units are evenly distributed in the circumferential direction of the first chuck, and each adjustment unit is located in the radial direction of the first chuck;

[0011] The adjustment unit includes: a first bevel gear, a first worm gear, and a pawl;

[0012] The first bevel gear meshes with the first planar gear ring; the first bevel gear is rigidly connected to the first worm gear;

[0013] The chuck has a threaded hole, the first worm passes through the chuck, and the first worm meshes with the threaded hole of the chuck;

[0014] The central moment of inertia compensation mechanism includes: a second chuck, a second planar toothed ring, and multiple compensation units;

[0015] The second planar toothed ring is fitted onto the outside of the second chuck;

[0016] Multiple compensation units are evenly distributed in the circumferential direction of the second chuck, and each compensation unit is located in the radial direction of the second chuck.

[0017] The compensation unit includes: a second bevel gear, a second worm gear, and a counterweight;

[0018] The second bevel gear meshes with the second planar gear ring; the second bevel gear is rigidly connected to the second worm gear;

[0019] The counterweight has a threaded hole, the second worm passes through the counterweight, and the second worm meshes with the threaded hole of the counterweight.

[0020] Preferably, the upper jaw adjustment mechanism, the middle moment of inertia compensation mechanism, and the lower jaw adjustment mechanism are fixed together.

[0021] Preferably, a plurality of first worm gear rotation holes are evenly formed in the middle and on the outer periphery of the first chuck;

[0022] Multiple second worm gear rotation holes are evenly opened in the middle and outer periphery of the second chuck.

[0023] Preferably, a first convex groove is formed at the bottom of the first chuck;

[0024] The bottom of the chuck has a first concave groove; the first concave groove of the chuck and the first convex groove of the first chuck are fitted with a clearance.

[0025] The second chuck has a second convex groove at its bottom;

[0026] The counterweight has a second concave groove at its bottom; the second concave groove of the counterweight and the second convex groove of the second chuck are fitted with a clearance.

[0027] Preferably, the claw and the counterweight have the same mass.

[0028] Preferably, the first planar toothed ring and the circular first chuck are placed concentrically, and the fit is a clearance fit;

[0029] The second planar toothed ring and the circular second chuck are placed concentrically, and the fit is a clearance fit.

[0030] Preferably, the gripping end of the claw has fine strip-shaped friction texture.

[0031] Preferably, the first chuck has a first scale line on the sliding path of the jaws, or a first displacement sensor is installed on the jaws;

[0032] The second chuck has a second scale line on the sliding path of the counterweight, or a second displacement sensor is installed on the counterweight.

[0033] Correspondingly, the present invention also provides an adjustment method for a coupling capable of clamping different shaft diameters and with constant moment of inertia according to any embodiment of the present invention, comprising the following steps:

[0034] Step 1: Clamp the first rotating shaft on the upper jaw adjustment mechanism, adjust the first worm gear of the upper jaw adjustment mechanism until the first rotating shaft is clamped, and determine the moving distance of the jaw of the upper jaw adjustment mechanism.

[0035] Step 2: Clamp the second rotating shaft on the lower jaw adjustment mechanism, adjust the first worm gear of the lower jaw adjustment mechanism until the second rotating shaft is clamped, and determine the moving distance of the jaw of the lower jaw adjustment mechanism;

[0036] Step 3: Calculate the moving distance of the counterweight in the central moment of inertia compensation mechanism according to the following formula:

[0037]

[0038] Where x1 represents the moving distance of the jaw in the upper jaw adjustment mechanism, x2 represents the moving distance of the jaw in the lower jaw adjustment mechanism, and x3 represents the moving distance of the counterweight in the middle moment of inertia compensation mechanism.

[0039] Step 4: Adjust the central rotational inertia compensation mechanism according to the moving distance of the counterweight block in the central rotational inertia compensation mechanism calculated in Step 3.

[0040] This invention provides a coupling capable of clamping shafts of different diameters while maintaining a constant moment of inertia. The upper jaw adjustment mechanism, the middle moment of inertia compensation mechanism, and the lower jaw adjustment mechanism are concentrically arranged. The jaws and the counterweight have the same mass, ensuring their centers of mass are on a vertical line. The coupling fixes the rotating shaft through the upper and lower jaw adjustment mechanisms. According to the parallel axis theorem, when the jaws clamp shafts of different diameters, the displacement of the jaws will cause a change in the moment of inertia of the coupling. Simultaneously, the counterweight of the middle moment of inertia compensation mechanism compensates for this change using the displacement relationship derived from the parallel axis theorem.

[0041] The coupling of this invention can clamp shafts of different diameters while ensuring that its moment of inertia remains constant when clamping shafts of different diameters. This allows it to be used in applications with strict requirements for moment of inertia, thereby eliminating any impact on system stability and accuracy. The upper and lower jaw adjustment mechanisms of this invention effectively solve the inertia errors caused during installation and disassembly when changing couplings for different shaft diameters. This fundamentally meets the high-precision requirements for moment of inertia in high-precision applications. Furthermore, the clamping and adjustment are performed by moving the jaws according to the shaft diameter, making operation simple. This also provides a high-performance, high-precision, and highly adaptable coupling for other experimental calibration devices requiring moment of inertia.

[0042] The compensation method of the central rotational inertia compensation mechanism of this invention is derived based on the parallel axis theorem. In the aforementioned chuck adjustment mechanism, the chucks move when gripping shafts of different diameters, resulting in a change in the overall rotational inertia of the coupling. This change is further compensated by the movement of the counterweight in the central rotational inertia compensation mechanism. This compensation method effectively ensures that the rotational inertia of the coupling remains constant. Furthermore, the compensation method of the central rotational inertia compensation mechanism can also be applied to the field of fixtures, ensuring that the rotational inertia of the fixture does not change due to variations in the diameter of the gripped shaft. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the coupling provided by the present invention, which can clamp different shaft diameters and has a constant moment of rotational inertia;

[0044] Figure 2 This is an exploded view of the coupling provided by the present invention, which can clamp different shaft diameters and has a constant moment of rotational inertia;

[0045] Figure 3 This is a schematic diagram of the upper jaw adjustment mechanism and the lower jaw adjustment mechanism provided by the present invention;

[0046] Figure 4 This is a schematic diagram of the structure of the first chuck provided by the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of the chuck provided by the present invention;

[0048] Figure 6 This is a schematic diagram of the structure of the central rotational inertia compensation mechanism provided by the present invention;

[0049] Figure 7 This is a schematic diagram of the counterweight block provided by the present invention.

[0050] Reference numerals: 1. Upper chuck adjustment mechanism; 2. Middle rotational inertia compensation mechanism; 3. Lower chuck adjustment mechanism; 101. First chuck; 102. First planar gear ring; 103. First bevel gear; 104. First worm gear; 105. Chuck; 1011. First convex groove; 1012. First worm gear rotation hole; 1051. First concave groove; 201. Second chuck; 202. Second planar gear ring; 203. Second bevel gear; 204. Second worm gear; 205. Counterweight; 2051. Second concave groove. Detailed Implementation

[0051] To make the technical problems solved by this invention, the technical solutions adopted, and the technical effects achieved clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings, not all of them.

[0052] like Figure 1-2 As shown in the figure, the present invention provides a coupling that can clamp different shaft diameters and has a constant moment of inertia, including an upper jaw adjustment mechanism 1, a middle moment of inertia compensation mechanism 2 and a lower jaw adjustment mechanism 3.

[0053] The upper jaw adjustment mechanism 1, the middle rotational inertia compensation mechanism 2, and the lower jaw adjustment mechanism 3 are arranged concentrically. The upper jaw adjustment mechanism 1, the middle rotational inertia compensation mechanism 2, and the lower jaw adjustment mechanism 3 are stacked and fixed together in sequence. The fixing method can be achieved by an external frame or shell. The upper jaw adjustment mechanism 1, the middle rotational inertia compensation mechanism 2, and the lower jaw adjustment mechanism 3 are respectively fixed on the same frame or shell to achieve fixation together.

[0054] like Figure 3As shown, the upper jaw adjustment mechanism 1 and the lower jaw adjustment mechanism 3 have the same structure, each including: a first chuck 101, a first planar toothed ring 102, and multiple adjustment units. The first planar toothed ring 102 is fitted around the outside of the first chuck 101; the first planar toothed ring 102 and the circular first chuck 101 are placed concentrically, and the fit is a clearance fit.

[0055] The first chuck 101 has a plurality of first worm gear rotation holes 1012 evenly opened in the middle and outer periphery, which respectively fix the two ends of the first worm gear 104 of the adjustment unit and constrain the first worm gear 104's other degrees of freedom except for the axial direction.

[0056] Multiple adjustment units are evenly distributed in the circumferential direction of the first chuck 101, and each adjustment unit is located in the radial direction of the first chuck 101.

[0057] The adjusting unit includes: a first bevel gear 103, a first worm gear 104, and a chuck 105; the first bevel gear 103 meshes with a first planar gear ring 102; the first bevel gear 103 and the first worm gear 104 are rigidly connected; the chuck 105 has a threaded hole, which is a cylindrical through hole, through which the first worm gear 104 passes, and the first worm gear 104 meshes with the threaded hole of the chuck 105. The clamping end of the chuck 105 has fine strip-shaped friction marks.

[0058] like Figure 4-5 As shown, in this embodiment, the first chuck 101 has a first convex groove 1011 at its bottom; the jaw 105 has a first concave groove 1051 at its bottom; the jaw 105 has a clearance fit with the first concave groove 1051 and the first convex groove 1011 of the first chuck 101, so that the jaw 105 slides on the first convex groove 1011 of the first chuck 101.

[0059] The first chuck 101 has a first scale line set on the sliding path of the jaw 105, or a first displacement sensor is installed on the jaw 105. The moving distance of the jaw 105 is obtained through the first scale line or the first displacement sensor.

[0060] In this embodiment, the adjustment unit is set into three groups, each with the same structure and engagement method, which will not be described in detail here. The three groups of adjustment units are evenly distributed on the first chuck 101, and the three jaws 105 are equidistant from the axis. By rotating the first worm gear 104, the first bevel gear 103 meshes with the first planar gear ring 102 for transmission. The rotation of the first planar gear ring 102 drives the other first worm gears 104 to rotate synchronously. At the same time, the threads of the first worm gears 104 mesh with the threaded holes of the jaws 105 to control the movement of the three jaws 105 on the first chuck 101. To increase the friction between the jaws 105 and the rotating shaft, fine strip-shaped friction textures are designed and machined on the arc surface of the jaw 105 clamping end to ensure clamping stability.

[0061] The upper jaw adjustment mechanism 1 and the lower jaw adjustment mechanism 3 have the same structure, but opposite directions, with the first chuck 101 facing inward and the jaws 105 facing outward.

[0062] like Figure 6 As shown, the central rotational inertia compensation mechanism 2 includes: a second chuck 201, a second planar toothed ring 202, and multiple compensation units. The second planar toothed ring 202 is fitted around the outside of the second chuck 201. The second planar toothed ring 202 and the circular second chuck 201 are placed concentrically, and the fit is a clearance fit.

[0063] The second chuck 201 has multiple second worm gear rotation holes evenly opened in the middle and on the outer periphery, which fix the two ends of the second worm gear 204 of the compensation unit respectively, and constrain the other degrees of freedom of the second worm gear 204 except for the axial direction.

[0064] Multiple compensation units are evenly distributed in the circumferential direction of the second chuck 201, and each compensation unit is located in the radial direction of the second chuck 201.

[0065] The compensation unit includes: a second bevel gear 203, a second worm gear 204, and a counterweight 205; the second bevel gear 203 meshes with a second planar toothed ring 202; the second bevel gear 203 is rigidly connected to the second worm gear 204; the counterweight 205 has a threaded hole, which is a cylindrical through hole, and the second worm gear 204 passes through the counterweight 205, and the second worm gear 204 meshes with the threaded hole of the counterweight 205.

[0066] In this embodiment, a second convex groove is formed at the bottom of the second chuck 201; such as Figure 7 As shown, a second concave groove 2051 is provided at the bottom of the counterweight 205; the second concave groove 2051 of the counterweight 205 and the second convex groove of the second chuck 201 are fitted with a clearance, so that the counterweight 205 slides on the second convex groove of the second chuck 201.

[0067] The second chuck 201 has a second scale line on the sliding path of the counterweight 205, or a second displacement sensor is installed on the counterweight 205. The moving distance of the counterweight 205 is obtained through the second scale line or the second displacement sensor.

[0068] In this embodiment, the overall structure and engagement method of the middle rotational inertia compensation mechanism 2 are basically the same as those of the upper jaw adjustment mechanism 1 and the lower jaw adjustment mechanism 3, except that the jaw 105 is replaced by a counterweight 205. The jaw 105 and the counterweight 205 have the same mass and ensure that their centers of mass are on the same vertical line. The middle rotational inertia compensation mechanism 2 is set into three groups, and the structure and engagement method of each group of the middle rotational inertia compensation mechanism 2 are the same, which will not be described again. By rotating the second worm 204, the second bevel gear 203 is driven to mesh with the second planar gear ring 202 for transmission. The rotation of the second planar gear ring 202 simultaneously drives the other second worms 204 to rotate synchronously. At the same time, the threads of the second worms 204 and the threaded holes of the counterweight 205 are engaged to control the movement of the three counterweights 205 on the second chuck 201.

[0069] This invention discloses a coupling capable of clamping shafts of different diameters while maintaining a constant moment of inertia. The upper jaw adjustment mechanism 1, the middle moment of inertia compensation mechanism 2, and the lower jaw adjustment mechanism 3 are concentrically arranged. The jaws 105 and the counterweight 205 have the same mass, ensuring their centers of mass are on a vertical line. According to the parallel axis theorem, when the jaws 105 clamp shafts of different diameters, the displacement of the jaws 105 will cause a change in the moment of inertia of the device itself. Simultaneously, the counterweight 205 in the middle compensates for the movement based on the displacement relationship derived from the parallel axis theorem.

[0070] The present invention also provides an adjustment method for a coupling capable of clamping different shaft diameters and with constant moment of inertia according to any embodiment of the present invention, comprising the following steps:

[0071] Step 1: Clamp the first rotating shaft on the upper jaw adjustment mechanism 1, adjust the first worm gear 104 of the upper jaw adjustment mechanism 1 until the first rotating shaft is clamped, and determine the moving distance of the jaw 105 of the upper jaw adjustment mechanism 1.

[0072] Specifically, based on the diameter of the rotating shaft held by the upper jaw adjustment mechanism 1, the first worm gear 104 in the upper jaw adjustment mechanism 1 is rotated to drive the first bevel gear 103 to mesh with the first planar gear ring 102 for transmission. This causes the first planar gear ring 102 to rotate and simultaneously drive the other first worm gears 104 to rotate synchronously. The first worm gear 104 meshes with the threaded holes of the jaws 105 to control all jaws 105 to move on the first chuck 101 until the held rotating shaft is tightened and self-locked.

[0073] The moving distance x1 of the jaw 105 of the upper jaw adjustment mechanism 1 is determined by the first scale line of the upper jaw adjustment mechanism 1 or the first displacement sensor.

[0074] Step 2: Clamp the second rotating shaft on the lower jaw adjustment mechanism 3, adjust the first worm gear 104 of the lower jaw adjustment mechanism 3 until the second rotating shaft is clamped, and determine the moving distance of the jaw 105 of the lower jaw adjustment mechanism 3.

[0075] Specifically, based on the diameter of the rotating shaft held by the lower jaw adjustment mechanism 3, the first worm gear 104 in the lower jaw adjustment mechanism 3 drives the first bevel gear 103 to mesh with the first planar gear ring 102 for transmission. This causes the first planar gear ring 102 to rotate, simultaneously driving the other first worm gears 104 to rotate synchronously. The first worm gear 104 meshes with the threads of the threaded holes of the jaws 105 to control the movement of all jaws 105 on the first chuck 101 until the held rotating shaft is tightened and self-locked.

[0076] The movement distance x2 of the jaw 105 of the lower jaw adjustment mechanism 3 is determined by the first scale line of the lower jaw adjustment mechanism 3 or the first displacement sensor.

[0077] Step 3: Calculate the moving distance of the counterweight 205 in the central rotational inertia compensation mechanism 2 according to the following formula:

[0078]

[0079] Where x1 represents the moving distance of the jaw 105 of the upper jaw adjustment mechanism 1, x2 represents the moving distance of the jaw 105 of the lower jaw adjustment mechanism 3, and x3 represents the moving distance of the counterweight 205 in the middle rotational inertia compensation mechanism 2.

[0080] Step 4: Adjust the central rotational inertia compensation mechanism 2 according to the moving distance of the counterweight 205 in the central rotational inertia compensation mechanism 2 calculated in Step 3.

[0081] To compensate for the change in the overall rotational inertia caused by the movement distance of the jaws 105 in the upper jaw adjustment mechanism 1 and the lower jaw adjustment mechanism 3, the second worm 204 in the rotational inertia compensation mechanism 2 drives the second bevel gear 203 to mesh with the second planar gear ring 202 for transmission. This causes the second planar gear ring 202 to rotate, simultaneously driving the other second worms 204 to rotate synchronously. The second worm 204 meshes with the threaded hole of the counterweight 205 to control the movement of all counterweights 205 on the second chuck 201. The movement distance is determined based on the movement distance of the jaws 105 in the upper jaw adjustment mechanism 1 and the lower jaw adjustment mechanism 3.

[0082] The following explains the principle behind calculating the moving distance of the counterweight 205 in the central moment of inertia compensation mechanism 2 in step 3:

[0083] According to the parallel axis theorem, the moment of inertia of an object along a parallel axis through the perpendicular distance between its center of gravity and the axis can be used to determine the moment of inertia of mass or the second moment of area of ​​a given rigid body.

[0084] J 总 =J 初 +mx 2

[0085] Among them, J 总 For the changed moment of inertia, J 初 Let m be the initial moment of inertia, m be the mass of the object, and x be the distance from the center of mass of the object to the axis of rotation.

[0086] Furthermore, the chuck 105 and the counterweight 205 have the same mass and their centers of mass are on the same vertical line. The moment of inertia of the chuck 105 in the upper chuck adjustment mechanism 1 and the lower chuck adjustment mechanism 3 is J1, and the moment of inertia of the counterweight 205 in the middle moment of inertia compensation mechanism 2 is J2.

[0087] Furthermore, the distance x between the center of mass of the chuck 105 and the counterweight 205 and the clamping axis is a set value that is based on the premise that the chuck 105 and the counterweight 205 have a margin of movement.

[0088] The moments of inertia of the jaws 105 about the coupling in the upper jaw adjustment mechanism 1 and the lower jaw adjustment mechanism 3 are respectively J k The moment of inertia of the counterweight plate 205 in the central moment of inertia compensation mechanism 2 with respect to the coupling is J. p ,have:

[0089] J k =J1+mx 2

[0090] J p =J2+mx 2

[0091] Specifically, when the jaw 105 of the upper jaw adjustment mechanism 1 is clamping a rotating shaft with different diameters, the moving distance is assumed to be x1; when the jaw 105 of the lower jaw adjustment mechanism 3 is clamping a rotating shaft with different diameters, the moving distance is assumed to be x2; at the same time, the counterweight 205 moves x3 on the second chuck 201 to compensate for the change in rotational inertia caused by the upper jaw adjustment mechanism 1 and the lower jaw adjustment mechanism 3.

[0092] According to the parallel axis theorem, the changed value of the moment of inertia of the pawl 105 of the upper pawl adjustment mechanism 1 about the coupling is J. c1The value of the moment of inertia of the jaw 105 of the lower jaw adjustment mechanism 3 relative to the coupling after the change is J. c2 The value of the moment of inertia of the counterweight 205 of the central moment of inertia compensation mechanism 2 after the change with respect to the coupling is J. c3 ,have:

[0093] J c1 =J1+m(x+x1) 2

[0094] J c2 =J1+m(x+x2) 2

[0095] J c3 =J² + m(x + x³) 2

[0096] Furthermore, to ensure that the moment of inertia of the coupling itself does not change, the following is provided:

[0097] J c1 +J c2 +J c3 =2Jk+J p

[0098] Expanding the above formula further, we have:

[0099] 2J1+J2+m(x+x1) 2 +m(x+x2) 2 +m(x+x3) 2 =2J1+2mx 2 +J2+mx 2

[0100] After simplification, it becomes:

[0101] (x+x1) 2 +(x+x2) 2 +(x+x3) 2 =3x 2

[0102] To further simplify:

[0103] x1 2 +x2 2 +x3 2 +2x(x1+x2+x3)=0

[0104] get:

[0105]

[0106] Where x, x1, and x2 are known values, and x1, x2, and x3 are set to be positive when the jaw 105 of the upper jaw adjustment mechanism 1, the jaw 105 of the lower jaw adjustment mechanism 3, and the counterweight 205 move outward, and negative otherwise. By applying the functional relationship between x, x1, x2, and x3 in the formula, the change in rotational inertia of the jaw 105 in the upper jaw adjustment mechanism 1 and the lower jaw adjustment mechanism 3, and the corresponding rotational inertia compensation value of the counterweight 205 in the middle rotational inertia compensation mechanism, can be obtained. Through the compensation mechanism, the rotational inertia value of the entire coupling can be kept constant.

[0107] In summary, the change in rotational inertia of the jaw 105 in the upper jaw adjustment mechanism 1 and the lower jaw adjustment mechanism 3 of the coupling of the present invention, and the corresponding rotational inertia compensation amount of the counterweight 205 in the middle rotational inertia compensation mechanism 2, through the aforementioned compensation mechanism, thereby ensure that the rotational inertia J of the entire device remains constant.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coupling capable of clamping shafts of different diameters while maintaining a constant moment of inertia, characterized in that, It includes an upper chuck adjustment mechanism (1), a middle rotational inertia compensation mechanism (2), and a lower chuck adjustment mechanism (3). The upper jaw adjustment mechanism (1), the middle moment of inertia compensation mechanism (2), and the lower jaw adjustment mechanism (3) are concentrically arranged; The upper jaw adjustment mechanism (1) and the lower jaw adjustment mechanism (3) have the same structure, and respectively include: a first chuck (101), a first planar toothed ring (102) and multiple adjustment units; The first planar toothed ring (102) is fitted onto the outside of the first chuck (101); Multiple adjustment units are evenly distributed in the circumferential direction of the first chuck (101), and each adjustment unit is located in the radial direction of the first chuck (101); The adjustment unit includes: a first bevel gear (103), a first worm gear (104), and a pawl (105); The first bevel gear (103) meshes with the first planar gear ring (102); the first bevel gear (103) is rigidly connected to the first worm (104); The chuck (105) has a threaded hole, the first worm (104) passes through the chuck (105), and the first worm (104) engages with the threaded hole of the chuck (105); The central moment of inertia compensation mechanism (2) includes: a second chuck (201), a second planar toothed ring (202), and multiple compensation units; The second planar toothed ring (202) is fitted onto the outside of the second chuck (201); Multiple compensation units are evenly distributed in the circumferential direction of the second chuck (201), and each compensation unit is located in the radial direction of the second chuck (201); The compensation unit includes: a second bevel gear (203), a second worm gear (204), and a counterweight (205). The second bevel gear (203) meshes with the second planar gear ring (202); the second bevel gear (203) is rigidly connected to the second worm (204); The counterweight (205) has a threaded hole, the second worm (204) passes through the counterweight (205), and the second worm (204) meshes with the threaded hole of the counterweight (205); The first chuck (101) has a plurality of first worm gear rotation holes (1012) evenly opened in the middle and on the outer periphery; the second chuck (201) has a plurality of second worm gear rotation holes evenly opened in the middle and on the outer periphery. The first chuck (101) has a first convex groove (1011) at its bottom; the jaw (105) has a first concave groove (1051) at its bottom; the first concave groove (1051) of the jaw (105) and the first convex groove (1011) of the first chuck (101) are in clearance fit; the second chuck (201) has a second convex groove at its bottom; the counterweight (205) has a second concave groove (2051) at its bottom; the second concave groove (2051) of the counterweight (205) and the second convex groove of the second chuck (201) are in clearance fit; The chuck (105) and the counterweight (205) have the same mass.

2. The coupling according to claim 1, capable of clamping different shaft diameters while maintaining a constant moment of inertia, is characterized in that... The upper claw adjustment mechanism (1), the middle rotational inertia compensation mechanism (2), and the lower claw adjustment mechanism (3) are fixed together.

3. The coupling according to claim 1, capable of clamping different shaft diameters while maintaining a constant moment of inertia, is characterized in that... The first planar toothed ring (102) and the circular first chuck (101) are placed concentrically, and the fit is a clearance fit; The second planar toothed ring (202) and the circular second chuck (201) are placed concentrically and are fitted with a clearance fit.

4. The coupling according to claim 1, capable of clamping different shaft diameters while maintaining a constant moment of inertia, is characterized in that... The gripping end of the claw (105) has fine strip-shaped friction patterns.

5. The coupling according to claim 1, capable of clamping different shaft diameters while maintaining a constant moment of inertia, is characterized in that... The first chuck (101) has a first scale line set on the sliding path of the jaw (105), or a first displacement sensor is installed on the jaw (105); The second chuck (201) has a second scale line on the sliding path of the counterweight (205), or a second displacement sensor is installed on the counterweight (205).

6. A method for adjusting a coupling capable of clamping different shaft diameters and with a constant moment of inertia according to any one of claims 1 to 5, characterized in that, The process includes the following: Step 1: Clamp the first rotating shaft on the upper jaw adjustment mechanism (1), adjust the first worm (104) of the upper jaw adjustment mechanism (1) until the first rotating shaft is clamped, and determine the moving distance of the jaw (105) of the upper jaw adjustment mechanism (1); Step 2: Clamp the second rotating shaft on the lower jaw adjustment mechanism (3), adjust the first worm (104) of the lower jaw adjustment mechanism (3) until the second rotating shaft is clamped, and determine the moving distance of the jaw (105) of the lower jaw adjustment mechanism (3); Step 3: Calculate the moving distance of the counterweight (205) in the central moment of inertia compensation mechanism (2) according to the following formula: ； in, This indicates the distance the jaw (105) of the upper jaw adjustment mechanism (1) moves. This indicates the moving distance of the lower jaw adjustment mechanism (3) jaw (105). This indicates the distance the counterweight (205) in the central moment of inertia compensation mechanism (2) has moved. The distance between the object's center of mass and the axis of rotation; Step 4: Adjust the central rotational inertia compensation mechanism (2) according to the moving distance of the counterweight (205) in the central rotational inertia compensation mechanism (2) calculated in Step 3.

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