Coupler capable of clamping different shaft diameters and invariable in rotational inertia

Abstract

The invention relates to the technical field of mechanical transmission, and provides a coupling capable of clamping different shaft diameters and invariable in rotational inertia, which comprises an upper jaw adjusting mechanism, a middle rotational inertia compensation mechanism and a lower jaw adjusting mechanism, the upper clamping jaw adjusting mechanism comprises a first chuck, a first plane gear ring and a plurality of adjusting units. The first plane gear ring sleeves the outer side of the first chuck; the multiple adjusting units are evenly distributed in the circumferential direction of the first chuck, and each adjusting unit is located in the radial direction of the first chuck. The adjusting unit comprises a first bevel gear, a first worm and a clamping jaw; the first bevel gear is meshed with the first plane gear ring; the first bevel gear is rigidly connected with the first worm; a threaded hole is formed in the clamping jaw, the first worm penetrates through the clamping jaw, and the first worm is meshed with the threaded hole of the clamping jaw. The clamping device can clamp rotating shafts with different shaft diameters, and it is guaranteed that the rotational inertia is not changed when the rotating shafts with the different shaft diameters are clamped.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical transmission, and in particular to a coupling capable of clamping shafts of different diameters and having a constant moment of inertia. Background Art

[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] At present, most common couplings on the market can only adapt to the connection of specific shaft diameters. When shafts with different shaft diameters need to be connected, couplings of different specifications often need to be replaced, which not only increases costs, but also reduces the versatility and installation efficiency of the equipment. In addition, in some application scenarios with strict requirements on the moment of inertia, such as high-precision CNC machine tools and robots, when traditional couplings are connected to shafts with different shaft diameters, the moment of inertia will change due to the disassembly of the coupling and the replacement of specifications, thereby affecting the dynamic performance and accuracy of the equipment.

[0004] With the continuous improvement of industrial automation, the requirements for versatility, stability and precision of mechanical transmission systems are becoming higher and higher. Therefore, developing a coupling that can clamp different shaft diameters and keep the moment of inertia constant has become an urgent problem to be solved in the current mechanical engineering field. Summary of the invention

[0005] The present invention mainly solves the technical problems that traditional couplings need to be frequently replaced when facing the connection requirements of different shaft diameters, and the rotational inertia changes caused by replacement and disassembly of couplings in application scenarios with strict requirements on the rotational inertia. A coupling is proposed that can clamp different shaft diameters with unchanged rotational inertia, so as to clamp rotating shafts with different shaft diameters and ensure that its own rotational inertia remains unchanged when clamping rotating shafts with different shaft diameters.

[0006] The present invention provides a coupling capable of clamping shafts of different diameters and having a constant moment of inertia, comprising an upper clamping jaw adjustment mechanism, a middle moment of inertia compensation mechanism and a lower clamping jaw adjustment mechanism;

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

[0008] The upper jaw adjustment mechanism and the lower jaw adjustment mechanism have the same structure, and respectively comprise: a first chuck, a first planar gear ring, and a plurality of adjustment units;

[0009] The first plane gear ring is sleeved on the outside of the first chuck;

[0010] The plurality of adjustment units are evenly distributed in the circumferential direction of the first chuck, and a single adjustment unit is located in the radial direction of the first chuck;

[0011] The adjusting unit comprises: a first bevel gear, a first worm and a claw;

[0012] The first bevel gear is meshed with the first plane gear ring; the first bevel gear is rigidly connected with the first worm;

[0013] The claw has a threaded hole therein, the first worm passes through the claw, and the first worm is engaged with the threaded hole of the claw;

[0014] The middle rotation inertia compensation mechanism comprises: a second chuck, a second planar gear ring and a plurality of compensation units;

[0015] The second flat gear ring is sleeved on the outside of the second chuck;

[0016] The plurality of compensation units are evenly distributed in the circumferential direction of the second chuck, and a single compensation unit is located in the radial direction of the second chuck;

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

[0018] The second bevel gear is meshed with the second plane gear ring; the second bevel gear is rigidly connected with the second worm;

[0019] The counterweight block has a threaded hole therein, the second worm passes through the counterweight block, and the second worm is meshed with the threaded hole of the counterweight block.

[0020] Preferably, the upper clamping jaw adjusting mechanism, the middle rotational inertia compensation mechanism and the lower clamping jaw adjusting mechanism are fixed together.

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

[0022] A plurality of second worm rotation holes are evenly arranged in the middle and the periphery of the second chuck.

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

[0024] A first concave groove is provided at the bottom of the clamping jaw; the first concave groove of the clamping jaw is clearance-matched with the first convex groove of the first chuck;

[0025] A second convex groove is provided at the bottom of the second chuck;

[0026] A second concave groove is provided at the bottom of the counterweight block; the second concave groove of the counterweight block is clearance-matched with the second convex groove of the second chuck.

[0027] Preferably, the claw has the same mass as the counterweight.

[0028] Preferably, the first planar gear ring is placed concentrically with the circular first chuck, and the matching mode is a clearance fit;

[0029] The second planar gear ring is placed concentrically with the circular second chuck, and the fitting mode is a clearance fit.

[0030] Preferably, the clamping end of the clamping claw has thin strip-shaped friction lines.

[0031] Preferably, the first chuck is provided with 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 is provided with a second scale line on the sliding path of the counterweight block, or a second displacement sensor is installed on the counterweight block.

[0033] Correspondingly, the present invention further provides an adjustment method for a coupling capable of clamping shafts of different diameters and having a constant moment of inertia according to any embodiment of the present invention, comprising the following process:

[0034] Step 1, clamping the first rotating shaft on the upper clamping claw adjusting mechanism, adjusting the first worm of the upper clamping claw adjusting mechanism until the first rotating shaft is clamped, and determining the moving distance of the clamping claw of the upper clamping claw adjusting mechanism;

[0035] Step 2, clamp the second rotating shaft on the lower clamping jaw adjusting mechanism, adjust the first worm of the lower clamping jaw adjusting mechanism until the second rotating shaft is clamped, and determine the moving distance of the clamping jaw of the lower clamping jaw adjusting mechanism;

[0036] Step 3, calculate the moving distance of the counterweight block in the middle moment of inertia compensation mechanism according to the following formula:

[0037]

[0038] Wherein, x1 represents the moving distance of the claw of the upper claw adjustment mechanism, x2 represents the moving distance of the claw of the lower claw adjustment mechanism, and x3 represents the moving distance of the counterweight block in the middle moment of inertia compensation mechanism;

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

[0040] The present invention provides a coupling that can clamp shafts of different diameters and has 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 block have the same mass and ensure that the center of mass is on a vertical line. The coupling fixes the rotating shaft through the upper jaw adjustment mechanism and the lower jaw adjustment mechanism. According to the parallel axis theorem, when the jaws clamp shafts of different diameters, the displacement of the jaws will cause the coupling to produce a change in moment of inertia. At the same time, the counterweight block of the middle moment of inertia compensation mechanism moves and compensates according to the displacement relationship derived from the parallel axis theorem.

[0041] The coupling of the present invention can clamp rotating shafts with different shaft diameters, and can ensure that its own moment of inertia remains unchanged when clamping rotating shafts with different shaft diameters. It can be used in some application scenarios with strict requirements on the moment of inertia, thereby eliminating the impact on the stability and accuracy of the system. The upper jaw adjustment mechanism and the lower jaw adjustment mechanism of the present invention can effectively solve the inertia error caused by the installation and disassembly process in the process of replacing the coupling with different shaft diameters, and fundamentally meet the high-precision requirements for the moment of inertia in some high-precision application scenarios. At the same time, according to the shaft diameter of the rotating shaft, the clamping is adjusted by moving the jaws, and the operation method is simple. It also provides a high-performance, high-precision, and highly adaptable coupling for some other experimental calibration devices that require moment of inertia.

[0042] The compensation method of the middle moment of inertia compensation mechanism of the present invention is derived based on the parallel axis theorem. The claws in the above-mentioned claw adjustment mechanism will move when clamping the rotating shafts of different shaft diameters. The resulting displacement will cause the change of the overall moment of inertia of the coupling. Further movement compensation is performed through the counterweight block of the middle moment of inertia compensation mechanism. Through this compensation method, the requirement of the coupling's own moment of inertia being fixed is effectively guaranteed. At the same time, the compensation method of the middle moment of inertia compensation mechanism can also be applied to the field of clamps. Through the above-mentioned compensation method, it is ensured that the moment of inertia of the clamp will not change due to the change of the clamped shaft diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of a coupling provided by the present invention that can clamp shafts of different diameters and has a constant moment of inertia;

[0044] Figure 2 It is an exploded view of a coupling provided by the present invention that can clamp shafts of different diameters and has a constant moment of inertia;

[0045] Figure 3 It is a structural schematic diagram of the upper clamping jaw adjusting mechanism and the lower clamping jaw adjusting mechanism provided by the present invention;

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

[0047] Figure 5 It is a structural schematic diagram of the clamping claw provided by the present invention;

[0048] Figure 6 It is a structural schematic diagram of the middle rotation inertia compensation mechanism provided by the present invention;

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

[0050] Figure numerals: 1. upper jaw adjustment mechanism; 2. middle rotational inertia compensation mechanism; 3. lower jaw adjustment mechanism; 101. first chuck; 102. first planar gear ring; 103. first bevel gear; 104. first worm; 105. jaw; 1011. first convex groove; 1012. first worm rotation hole; 1051. first concave groove; 201. second chuck; 202. second planar gear ring; 203. second bevel gear; 204. second worm; 205. counterweight; 2051. second concave groove. DETAILED DESCRIPTION

[0051] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all the contents.

[0052] like Figure 1-2 As shown, an embodiment of the present invention provides a coupling capable of clamping shafts of different diameters and having a constant moment of inertia, comprising 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 concentrically arranged; the upper jaw adjustment mechanism 1, the middle rotational inertia compensation mechanism 2 and the lower jaw adjustment mechanism 3 are sequentially stacked and fixed together, and the fixing method can be achieved through 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, and respectively include: a first chuck 101, a first planar gear ring 102, and a plurality of adjustment units. The first planar gear ring 102 is sleeved on the outside of the first chuck 101; the first planar gear ring 102 is placed concentrically with the circular first chuck 101, and the matching mode is clearance matching.

[0055] A plurality of first worm rotation holes 1012 are evenly arranged in the middle and outer periphery of the first chuck 101 to fix two ends of the first worm 104 of the adjustment unit respectively, and constrain the first worm 104 in other degrees of freedom except the axial direction.

[0056] The plurality of adjustment units are evenly distributed in the circumferential direction of the first chuck 101 , and a single adjustment unit is located in the radial direction of the first chuck 101 .

[0057] The adjustment unit includes: a first bevel gear 103, a first worm 104 and a claw 105; the first bevel gear 103 is meshed with the first plane gear ring 102; the first bevel gear 103 is rigidly connected with the first worm 104; the claw 105 has a threaded hole, the threaded hole is a cylindrical through hole, the first worm 104 passes through the claw 105, and the first worm 104 is meshed with the threaded hole of the claw 105. The clamping end of the claw 105 has a thin strip friction pattern.

[0058] like Figure 4-5 As shown, in this embodiment, a first convex groove 1011 is provided at the bottom of the first chuck 101; a first concave groove 1051 is provided at the bottom of the claw 105; the first concave groove 1051 of the claw 105 and the first convex groove 1011 of the first chuck 101 are clearance-matched, so that the claw 105 slides on the first convex groove 1011 of the first chuck 101.

[0059] The first chuck 101 is provided with a first scale line on the sliding path of the clamping claw 105, or a first displacement sensor is installed on the clamping claw 105. The moving distance of the clamping claw 105 is obtained through the first scale line or the first displacement sensor.

[0060] In this embodiment, the adjustment units are arranged in three groups, and the structure and matching mode of each group of adjustment units are the same, which will not be described in detail. The three groups of adjustment units are evenly distributed on the first chuck 101, and the three claws 105 are at the same distance from the axis. The first bevel gear 103 is driven to mesh with the first planar gear ring 102 by rotating the first worm 104, and the first planar gear ring 102 rotates to drive the other first worms 104 to rotate synchronously. At the same time, the first worm 104 is meshed with the thread of the threaded hole of the claw 105 to control the movement of the three claws 105 on the first chuck 101. In order to increase the friction between the claws 105 clamping the rotating shaft, fine strip friction lines are designed and processed on the arc surface of the clamping end of the claw 105 to ensure the stability of clamping.

[0061] The upper clamping jaw adjusting mechanism 1 and the lower clamping jaw adjusting mechanism 3 have the same structure but opposite directions, with the first chuck 101 facing inwards and the clamping jaws 105 facing outwards.

[0062] like Figure 6 As shown, the middle rotation inertia compensation mechanism 2 includes: a second chuck 201, a second planar gear ring 202 and a plurality of compensation units. The second planar gear ring 202 is sleeved on the outside of the second chuck 201. The second planar gear ring 202 is placed concentrically with the circular second chuck 201, and the matching mode is clearance matching.

[0063] A plurality of second worm rotation holes are evenly arranged in the middle and the outer periphery of the second chuck 201 to fix the two ends of the second worm 204 of the compensation unit respectively, and constrain the other degrees of freedom of the second worm 204 except the axial direction.

[0064] The plurality of compensation units are evenly distributed in the circumferential direction of the second chuck 201 , and a single 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 204 and a counterweight 205; the second bevel gear 203 is meshed with the second planar gear ring 202; the second bevel gear 203 is rigidly connected with the second worm 204; the counterweight 205 has a threaded hole, the threaded hole is a cylindrical through hole, the second worm 204 passes through the counterweight 205, and the second worm 204 is meshed 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; Figure 7 As shown, the second concave groove 2051 is formed at the bottom of the counterweight block 205 ; the second concave groove 2051 of the counterweight block 205 is clearance-matched with the second convex groove of the second chuck 201 , so that the counterweight block 205 slides on the second convex groove of the second chuck 201 .

[0067] The second chuck 201 is provided with 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 matching mode 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 transformed into a counterweight 205. The jaw 105 and the counterweight 205 have the same mass, and the center of mass is ensured to be on a vertical line. The middle rotational inertia compensation mechanism 2 is set into three groups, and the structure and matching mode of each group of the middle rotational inertia compensation mechanism 2 are the same, which will not be repeated. The second bevel gear 203 is driven to mesh with the second plane gear ring 202 by rotating the second worm 204 to transmit, and the second plane gear ring 202 rotates and drives the other second worms 204 to rotate synchronously at the same time, and the second worm 204 is meshed with the thread of the threaded hole of the counterweight 205 to control the three counterweights 205 to move on the second chuck 201.

[0069] The present invention discloses a coupling that can clamp shafts of different diameters and has 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 jaw 105 and the counterweight block 205 have the same mass and ensure that the center of mass is on a vertical line. According to the parallel axis theorem, when the jaw 105 clamps shafts of different diameters, the displacement of the jaw 105 will cause the device itself to generate a change in moment of inertia. At the same time, the counterweight block 205 located in the middle is moved and compensated by the displacement relationship derived from the parallel axis theorem.

[0070] The present invention further provides an adjustment method for a coupling capable of clamping shafts of different diameters and having a constant moment of inertia according to any embodiment of the present invention, comprising the following process:

[0071] Step 1, clamp the first rotating shaft on the upper clamping jaw adjusting mechanism 1, adjust the first worm 104 of the upper clamping jaw adjusting mechanism 1 until the first rotating shaft is clamped, and determine the moving distance of the clamping jaw 105 of the upper clamping jaw adjusting mechanism 1.

[0072] Specifically, according to the diameter of the rotating shaft clamped by the upper clamping jaw adjusting mechanism 1, the first worm 104 in the upper clamping jaw adjusting mechanism 1 is rotated to drive the first bevel gear 103 and the first planar gear ring 102 to engage with each other for transmission, so that the first planar gear ring 102 rotates and drives other first worms 104 to rotate synchronously, and the first worm 104 is engaged with the thread of the threaded hole of the clamping jaw 105 for transmission to control all the clamping jaws 105 to move on the first chuck 101 until the clamped rotating shaft is tightened and self-locked.

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

[0074] Step 2, clamp the second rotating shaft on the lower clamping jaw adjusting mechanism 3, adjust the first worm 104 of the lower clamping jaw adjusting mechanism 3 until the second rotating shaft is clamped, and determine the moving distance of the clamping jaw 105 of the lower clamping jaw adjusting mechanism 3;

[0075] Specifically, according to the diameter of the rotating shaft clamped by the lower jaw adjusting mechanism 3, the first worm 104 in the lower jaw adjusting mechanism 3 is rotated to drive the first bevel gear 103 and the first planar gear ring 102 to engage with each other for transmission, so that the first planar gear ring 102 rotates and drives other first worms 104 to rotate synchronously, and the first worm 104 is engaged with the thread of the threaded hole of the jaw 105 for transmission to control all the jaws 105 to move on the first chuck 101 until the clamped rotating shaft is tightened and self-locked.

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

[0077] Step 3, calculate the moving distance of the counterweight block 205 in the middle rotation inertia compensation mechanism 2 according to the following formula:

[0078]

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

[0080] Step 4: adjust the middle rotational inertia compensation mechanism 2 according to the moving distance of the counterweight block 205 in the middle rotational inertia compensation mechanism 2 calculated in step 3.

[0081] In order to compensate for the change in the rotational inertia of the entire device caused by the moving distance of the claw 105 in the upper claw adjustment mechanism 1 and the lower claw adjustment mechanism 3, the second worm 204 in the middle rotational inertia compensation mechanism 2 is driven to engage with the second planar gear ring 202 for transmission, so that the second planar gear ring 202 rotates and drives other second worms 204 to rotate synchronously. The second worm 204 engages with the thread of the threaded hole of the counterweight block 205 to control all the counterweight blocks 205 to move on the second chuck 201. The moving distance is determined according to the moving distance of the claw 105 in the upper claw adjustment mechanism 1 and the lower claw adjustment mechanism 3.

[0082] The principle of calculating the moving distance of the counterweight block 205 in the middle rotation inertia compensation mechanism 2 in step 3 is described below:

[0083] According to the parallel axis theorem: the moment of inertia about parallel axes is determined by the perpendicular distance between the center of gravity of the object and the axis, and can be used to determine the mass moment of inertia or the second moment of area of ​​a given rigid body.

[0084] J 总 =J 初 +mx 2

[0085] Among them, J 总 is the changed moment of inertia, J 初 is the initial moment of inertia, m is the mass of the object, and x is the distance between the center of mass of the object and the center of rotation.

[0086] Furthermore, the jaw 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 jaw 105 in the upper jaw adjustment mechanism 1 and the lower jaw 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 between the center of mass of the clamping claw 105 and the counterweight block 205 and the clamping rotation axis is x, and this value is a set value under the premise that the clamping claw 105 and the counterweight block 205 have a movement margin.

[0088] The rotational inertia of the upper jaw adjustment mechanism 1 and the lower jaw adjustment mechanism 3 for the coupling are J k The rotational inertia of the coupling for the counterweight plate 205 in the middle rotational inertia compensation mechanism 2 is J p ,have:

[0089] J k =J1+mx 2

[0090] J p =J2+mx 2

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

[0092] According to the parallel axis theorem, the value of the moment of inertia of the upper jaw adjustment mechanism 105 for the coupling after the change is J c1The value of the moment of inertia of the lower jaw adjustment mechanism 3 for the coupling after the change is J c2 The value of the rotational inertia of the coupling after the counterweight block 205 of the middle rotational inertia compensation mechanism 2 changes 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] To further ensure that the moment of inertia of the coupling of the present invention does not change, there are:

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

[0098] Further expanding the above formula, 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] Further simplified to:

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

[0104] get:

[0105]

[0106] Among them, x, x1, x2 are known values, and x1, x2, x3 are set to be positive when the claw 105 of the upper claw adjustment mechanism 1, the claw 105 of the lower claw adjustment mechanism 3 and the counterweight 205 move outward, and negative otherwise. Through the functional relationship of x, x1, x2, x3 in the formula, the change value of the moment of inertia of the claw 105 in the upper claw adjustment mechanism 1 and the lower claw adjustment mechanism 3 and the corresponding moment of inertia compensation value of the counterweight 205 in the middle moment of inertia compensation mechanism can be obtained, and the moment of inertia value of the entire coupling is guaranteed to be fixed through the compensation mechanism.

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

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that modifying the technical solutions described in the aforementioned embodiments, or replacing some or all of the technical features therein by equivalents, does 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 with constant moment of inertia, characterized in that: It comprises an upper clamping jaw adjusting mechanism (1), a middle rotational inertia compensation mechanism (2) and a lower clamping jaw adjusting mechanism (3); The upper clamping jaw adjustment mechanism (1), the middle rotational inertia compensation mechanism (2) and the lower clamping 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 comprise: a first chuck (101), a first planar gear ring (102), and a plurality of adjustment units; The first planar gear ring (102) is sleeved on the outside of the first chuck (101); The plurality of adjustment units are evenly distributed in the circumferential direction of the first chuck (101), and a single adjustment unit is located in the radial direction of the first chuck (101); The adjusting unit comprises: a first bevel gear (103), a first worm (104) and a claw (105); The first bevel gear (103) is meshed with the first planar gear ring (102); the first bevel gear (103) is rigidly connected to the first worm (104); The claw (105) has a threaded hole therein, the first worm (104) passes through the claw (105), and the first worm (104) is meshed with the threaded hole of the claw (105); The middle rotational inertia compensation mechanism (2) comprises: a second chuck (201), a second planar gear ring (202), and a plurality of compensation units; The second planar gear ring (202) is sleeved on the outside of the second chuck (201); The plurality of compensation units are evenly distributed in the circumferential direction of the second chuck (201), and a single compensation unit is located in the radial direction of the second chuck (201); The compensation unit comprises: a second bevel gear (203), a second worm (204) and a counterweight (205); The second bevel gear (203) is meshed with the second planar gear ring (202); the second bevel gear (203) is rigidly connected to the second worm (204); The counterweight block (205) has a threaded hole therein, the second worm (204) passes through the counterweight block (205), and the second worm (204) is meshed with the threaded hole of the counterweight block (205).

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

3. The coupling capable of clamping shafts of different diameters and having a constant moment of inertia according to claim 1, characterized in that: A plurality of first worm rotation holes (1012) are evenly arranged in the middle and outer periphery of the first chuck (101); A plurality of second worm rotation holes are evenly arranged in the middle and outer periphery of the second chuck (201).

4. The coupling capable of clamping shafts of different diameters and having a constant moment of inertia according to claim 3, characterized in that: A first convex groove (1011) is provided at the bottom of the first chuck (101); A first concave groove (1051) is provided at the bottom of the clamping claw (105); the first concave groove (1051) of the clamping claw (105) and the first convex groove (1011) of the first chuck (101) are clearance-matched; A second convex groove is provided at the bottom of the second chuck (201); A second concave groove (2051) is provided at the bottom of the counterweight block (205); the second concave groove (2051) of the counterweight block (205) is clearance-matched with the second convex groove of the second chuck (201).

5. The coupling capable of clamping shafts of different diameters and having a constant moment of inertia according to claim 1, characterized in that: The clamping claw (105) and the counterweight (205) have the same mass.

6. The coupling capable of clamping shafts of different diameters and having a constant moment of inertia according to claim 1, characterized in that: The first planar gear ring (102) is placed concentrically with the circular first chuck (101), and the fitting mode is a clearance fit; The second planar gear ring (202) is placed concentrically with the circular second chuck (201), and the fitting mode is a clearance fit.

7. The coupling capable of clamping shafts of different diameters and having a constant moment of inertia according to claim 1, characterized in that: The clamping end of the clamping claw (105) has thin stripe-shaped friction lines.

8. The coupling capable of clamping shafts of different diameters and having a constant moment of inertia according to claim 1, characterized in that: The first chuck (101) is provided with a first scale line on the sliding path of the clamping claw (105), or a first displacement sensor is installed on the clamping claw (105); The second chuck (201) is provided with a second scale line on the sliding path of the counterweight (205), or a second displacement sensor is installed on the counterweight (205).

9. An adjustment method for a coupling capable of clamping shafts of different diameters and having a constant moment of inertia according to any one of claims 1 to 8, characterized in that: The process includes: Step 1, clamping the first rotating shaft on the upper clamping jaw adjusting mechanism (1), adjusting the first worm (104) of the upper clamping jaw adjusting mechanism (1) until the first rotating shaft is clamped, and determining the moving distance of the clamping jaw (105) of the upper clamping jaw adjusting mechanism (1); Step 2, clamping the second rotating shaft on the lower clamping jaw adjusting mechanism (3), adjusting the first worm (104) of the lower clamping jaw adjusting mechanism (3) until the second rotating shaft is clamped, and determining the moving distance of the clamping jaw (105) of the lower clamping jaw adjusting mechanism (3); Step 3, calculate the moving distance of the counterweight block (205) in the middle rotation inertia compensation mechanism (2) according to the following formula: Wherein, x1 represents the moving distance of the clamping claw (105) of the upper clamping claw adjustment mechanism (1), x2 represents the moving distance of the clamping claw (105) of the lower clamping claw adjustment mechanism (3), and x3 represents the moving distance of the counterweight (205) in the middle rotational inertia compensation mechanism (2); Step 4, adjusting the middle rotational inertia compensation mechanism (2) according to the moving distance of the counterweight block (205) in the middle rotational inertia compensation mechanism (2) calculated in step 3.

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