A measuring bench for measuring the torque value exerted by the transmission between permanent magnets

Abstract

The application discloses a measuring rack for measuring the torque value of the transmission force exerted between permanent magnets, wherein a weighing lever in the measuring rack is fastened with an A-shaped magnet loading shaft through a stud bolt, so that the torque suffered by the A-shaped magnet loading shaft is conducted to the weighing lever; a load line rope is wound around an outer edge ring groove of the weighing lever, one end of the load line rope is connected with the weighing lever, and the other end is connected with a weight; the load suffered by the load line rope is the gravity G of the weight, the load direction is tangent to the circumferential direction of the outer edge ring groove, the force arm of the torque of the weighing lever is the circumferential radius R of the outer edge ring groove, and the product of the gravity G of the weight and the circumferential radius R of the outer edge ring groove is equal to the torque M suffered by the weighing lever; the A-shaped magnet suffers the magnetic torque exerted by a B-shaped magnet, the torque direction is opposite to the torque M exerted by the weight on the weighing lever, and the A-shaped magnet loading shaft remains stationary, so that the torque M exerted by the weight on the weighing lever is the torque suffered by the A-shaped magnet.

Description

Technical Field

[0001] This invention belongs to the field of magnetic property measurement technology of permanent magnet materials, and specifically relates to a measuring stand for measuring the torque applied during transmission between permanent magnets. Background Technology

[0002] Permanent magnets are currently used for drive transmission in various industries. For example, in the woodworking industry, the Swiss company Lamello has developed an invisible magnetic screw called Invis Mx. It not only makes wood joints completely invisible but also features quick disassembly and superior load-bearing capacity. Its technical principle involves two radially magnetized permanent magnets arranged in parallel, with one magnet rotating around its axis within a certain interval, thus driving the other magnet to rotate around the same axis. Similarly, in the medical device industry, the magnetically controlled growth rod used in early-onset scoliosis surgery employs a similar technical principle to Lamello's invisible magnetic screw.

[0003] Although studies measuring the torque transmitted between permanent magnets have existed in foreign literature for some time, current research is neither in-depth nor comprehensive. They only cover specific location scenarios and lack multi-dimensional, multi-angle data. Most studies assume the permanent magnet axes are parallel, thus missing other scenarios such as the intersection of permanent magnet axes projected onto different planes.

[0004] Therefore, in order to measure the torque value of the permanent magnets when they are in multiple dimensions and angles, there is an urgent need to provide a measuring stand for measuring the torque value applied by the transmission between permanent magnets. Summary of the Invention

[0005] This invention provides a measuring stand for measuring the torque applied during transmission between permanent magnets, which can solve the defects and problems in the prior art.

[0006] To solve the above problems, the technical solution provided by the present invention is as follows:

[0007] This invention provides a measuring stand for measuring the torque applied during transmission between permanent magnets. The measuring stand includes a base (140), a rotating stage (160) and two shaft positioning keys (190) are provided on the base (140), and a curved knife holder (130) is movably provided on the rotating stage (160).

[0008] The two shaft positioning keys (190) are provided with sliding drive screws (170) and two sliding measuring rails (180). A slider platform (200) is provided on the sliding drive screws (170). A heightening pad (210) is provided on the slider platform (200). A slide rail (220) is provided on the heightening pad (210). A U-shaped bearing seat (20) is provided on the slide rail (220). A pair of bearings (21) are installed on the bearing seat (20). An A-type magnet loading shaft (40) is installed in the pair of bearings (21). An A-type magnet (2000) is installed at the front end of the A-type magnet loading shaft (40).

[0009] A flat flange bearing seat (60) is installed at one end of the curved blade holder (130). A worm gear positioning table (240), an idler wheel positioning slide (70), and an auxiliary gear are installed on the flat flange bearing seat (60). A magnet loading shaft gear (100) and an idler wheel (110) are respectively installed on the worm gear positioning table (240) and the idler wheel positioning slide (70). The magnet loading shaft gear (100) is connected to a type B magnet loading shaft (50). A type B magnet (1000) is provided on the type B magnet loading shaft (50).

[0010] A weighing rod (30) is mounted on the type A magnet loading shaft (40). The weighing rod (30) is fastened to the type A magnet loading shaft (40) by a headless screw (31) so that the torque on the type A magnet loading shaft (40) is transmitted to the weighing rod (30). The weighing rod (30) is provided with an outer ring groove (32). A load rope is wound around the outer ring groove (32). One end of the load rope is connected to the weighing rod (30), and the other end is connected to the weight. The load on the load rope is the weight G of the weight, and the load direction is perpendicular to the circle of the outer ring groove (32). Tangent in the circumferential direction, the lever arm of the torque of the weighing rod (30) is the circumferential radius R of the outer ring groove (32), and the weight G of the weight multiplied by the circumferential radius R of the outer ring groove (32) is equal to the torque M of the weighing rod (30); the type A magnet (2000) is subjected to a magnetic torque from the type B magnet (1000), and the direction of this torque is opposite to the torque M of the weight applied to the weighing rod (30), and the loading shaft (40) of the type A magnet remains stationary, then the torque M of the weight applied to the weighing rod (30) is the torque of the type A magnet (2000).

[0011] According to an optional embodiment of the present invention, the cylindrical base of the rotary table (160) is configured to cooperate with the rotary table slot (141) of the base (140) so that the rotary table (160) can rotate around the central axis of the rotary table slot (141); the rotary table (160) is also provided with a threaded lifting shaft (150).

[0012] The center hole of the rotary table (160) is a rotary table threaded hole (164), which is configured to cooperate with the shaft thread (152) of the threaded lifting shaft (150) so that rotating the threaded lifting shaft (150) can control the rotary table (160) to move up and down along the vertical direction of the Z-axis, where the Z-axis is the central axis of the rotary table (160).

[0013] The bottom of the slot (141) of the rotary table contacts the bottom of the threaded lifting shaft (150), thereby providing support for the threaded lifting shaft (150); the rotation direction of the rotary table (160) is tightened by a headless screw (161); the threaded lifting shaft (150) is tightened by a screw (162), which is screwed into the threaded hole (142) to prevent the threaded lifting shaft (150) from sliding after its position is determined; the rotary table (160) has a first scale (166) to facilitate the determination of the rotation angle.

[0014] According to an optional embodiment of the present invention, the bearing seat (20) is provided with a shoulder (23), and the slide rail (220) is provided with a T-slot (222). By the limiting fit between the outer shape of the shoulder (23) and the outer shape of the T-slot (222), the bearing seat (20) is restricted to move only in the X-axis direction. After the position of the bearing seat (20) is selected, a T-nut (221) is provided in the T-slot (222). A screw (225) passes through the bottom hole of the bearing seat (20) and engages with the T-nut (221). After the screw (225) is tightened, the position of the bearing seat (20) is fixed.

[0015] According to an optional embodiment of the present invention, the heightening pad (210) is used to increase the variation range of the bearing seat (20) in the vertical Z-axis; the protrusion (225) of the slide rail (220) and the groove (211) of the heightening pad (210) are matched to limit the relative movement of the slide rail (220) and the heightening pad (210) in the horizontal direction; four screws (224) are respectively passed through the countersunk holes at the four corners of the slide rail (220) and engaged with the four threaded holes (209) of the slider platform (200) to lock, thereby limiting the relative position of the slide rail (220) and the slider platform (200).

[0016] According to an optional embodiment of the present invention, a second scale (22) is provided on both sides of the bearing seat (20), and a third scale (223) is also provided on both sides of the slide rail (220). During the sliding process of the bearing seat (20) and the slide rail (220), the relative position of the second scale (22) and the third scale (223) can be observed to control the sliding displacement distance.

[0017] According to an optional embodiment of the present invention, the bottom of the slider platform (200) has two smooth through holes (201) and a threaded hole (202) in the middle. The two smooth through holes (201) on both sides are respectively clearance-fitted with the two sliding measuring rails (180), and the threaded through hole (202) in the middle is threadedly fitted with the sliding drive screw (170). The sliding drive screw (170) has a trapezoidal thread, which has stability.

[0018] The plane on which the shaft positioning key (190) mates with the base (140) has a U-shaped groove (149) to define the position of the shaft positioning key (190). The shaft positioning key (190) is provided with four countersunk holes in the vertical direction. Four screws (191) pass through one of the four countersunk holes of the shaft positioning key (190) and engage with the four threaded holes of the U-shaped groove (149). Their function is to fix the position of the shaft positioning key (190), thereby indirectly determining the relative position of the bearing seat (20) and the base (140).

[0019] According to an optional embodiment of the present invention, the front end of the B-type magnet loading shaft (50) has a threaded hole, which is used with screws (57) and washers (58) to install and fasten the B-type magnet (1000), and the front and rear positions of the B-type magnet 1000 can be adjusted by changing the thickness of the magnet washer (56).

[0020] The type B magnet loading shaft (50) is provided with a shoulder (51) and a scale ring (52). The outer surface of the scale ring (52) is engraved with a scale for marking the relative angle of rotation.

[0021] According to an optional embodiment of the present invention, a reading shim (120) is installed on the flat flange bearing seat (60). The perforated sleeve (63) at the tail of the B-type magnet loading shaft (50) passes through the center hole (121) of the reading shim (120) to ensure that the center of the reading shim is consistent with the center of the B-type magnet loading shaft (50) and to ensure the reading accuracy of the reading shim (120). The reading shim (120) is provided with a sharp corner (122) so that after installation, the position of the sharp corner is just aligned with the fourth scale (133) on the curved knife holder (130).

[0022] According to an optional embodiment of the present invention, the curved blade holder (130) is provided with a curved groove (132), the curved groove (132) is nested and engaged with the convex curved platform (165) of the rotary table (160) to limit the curved blade holder (130) to rotate only around the curved groove (132).

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) In view of the existing solution, there is a problem that the torque value of the torque transmitted between the permanent magnets cannot be measured under the multi-dimensional and multi-angle conditions of the relative positions of multiple permanent magnets. The present invention proposes a solution that supports the measurement of the torque value of a specific single permanent magnet under multi-dimensional and multi-angle conditions and the structural design of the measuring table.

[0025] (2) To address how to make the relative positions of multiple permanent magnets form staggered multi-angles, the measuring platform structure of the present invention is designed with a curved blade holder and a rotating platform. Some permanent magnets are installed above the curved blade holder, and the curved blade holder is installed on the rotating platform. The rotating platform can rotate around the vertical direction, while the curved blade holder can rotate around the horizontal direction. With the cooperation of the curved blade holder and the rotating platform, the permanent magnets can be positioned at any angle relative to the horizontal and vertical planes.

[0026] (3) Regarding how to achieve axial translation of the relative positions of multiple permanent magnets along the XYZ axes in Cartesian coordinates, the measuring platform structure of this invention includes a slide rail that moves in the X-axis direction, a slider platform that moves in the Y-axis direction, and a rotary table that can move in the Z-axis direction, wherein the Z-axis is the central axis of the rotary table. The slide rail achieves X-axis movement through structural limiting movement and is locked in place by a T-nut. The slider platform achieves Y-axis movement through a lead screw drive mechanism, and the rotary table achieves Z-axis movement through a lead screw drive mechanism with a threaded lifting shaft and is locked in place by a headless screw.

[0027] (4) To make the replacement of magnets more convenient, the measuring platform structure of the present invention is designed with multiple magnet loading shafts, and the magnets are installed on the magnet loading shafts; each magnet loading shaft is machined with threaded holes to facilitate the installation and removal of magnets; at the same time, each magnet loading shaft can rotate around its central axis, so as to operate the rotation of the large magnet to magnetically control the rotation of the small magnet.

[0028] (5) Regarding how to achieve the rotation of the magnet around the central axis, the multiple magnet loading shafts in the measuring platform of this invention are all mounted on their respective bearing seats; each magnet loading shaft and bearing seat is an independent entity, so each magnet loading shaft can freely rotate around its own axis. In particular, if a large magnet is required for linkage, it can be linked by gear meshing. This gear is mounted at the tail of the magnet loading shaft equipped with the large magnet. There is also an idler gear between the two gears. In addition to meshing transmission, the idler gear also has a range of motion that can move left, right, up, and down. This range of motion allows the two magnet loading shafts to still mesh and transmit power by adjusting the position of the idler gear after the distance between them has been adjusted.

[0029] (6) Regarding how to control the rotation of the magnet loading shaft, the measuring platform of the present invention controls the rotation of the magnet loading shaft through a worm gear or a drive handle, thereby controlling the rotation of the magnet. The drive handle is installed at the tail end of the magnet loading shaft and directly drives the rotation of the magnet loading shaft. The worm gear is installed on one side of the magnet loading shaft, and the transmission is controlled by the meshing of the worm gear with the gear at the tail end of the magnet loading shaft, while also having a self-locking effect.

[0030] (7) Regarding how to measure the torque value of a specific single permanent magnet under a certain state, the measuring platform of this invention uses a transfer method for measurement. The principle is as follows. Since a single permanent magnet is mounted and bound to the magnet loading shaft, the torque borne by the permanent magnet will be transferred to the magnet loading shaft. Therefore, we can suspend a weight on the outer cylindrical surface of the magnet loading shaft. The direction of the gravity G of the suspended weight is tangent to the outer surface of the shaft. Then, the torque can be obtained by multiplying the weight G of the weight by the lever arm R (radius of the shaft + radius of the suspension rope). As long as the frictional force of the bearing rotation is small enough, the direction of the torque formed by the magnetic force borne by the permanent magnet is opposite to the direction of the torque formed by the weight G of the weight, and the magnet loading shaft remains in uniform motion or stationary, we can roughly estimate the current torque value formed by the magnetic force borne by the permanent magnet, that is, G×R=M=torque value formed by the magnetic force borne by the permanent magnet. At the same time, we can also directly calculate the frictional force by other methods, and then estimate the current torque value formed by the magnetic force borne by the permanent magnet more accurately. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional schematic diagram of a measuring stand for measuring the torque applied during transmission between permanent magnets, provided as an embodiment of this application.

[0033] Figure 2 A cross-sectional view of a measuring stand for measuring the torque applied during transmission between permanent magnets, provided in an embodiment of this application.

[0034] Figure 3 This is a rear view of a measuring stand for measuring the torque applied during transmission between permanent magnets, as provided in an embodiment of this application.

[0035] Figure 4 The image shows a right view of a measuring stand for measuring the torque applied during transmission between permanent magnets, as provided in an embodiment of this application.

[0036] Figure 5 This is a top view of a measuring stand for measuring the torque applied during transmission between permanent magnets, as provided in an embodiment of this application.

[0037] Figure 6 This is a cross-sectional view of the magnet loading axis of a curved knife holder provided in an embodiment of this application.

[0038] Figure 7 , Figure 8 and Figure 9 An exploded view of a partial structure of a measuring stand for measuring the torque applied during transmission between permanent magnets, provided in an embodiment of this application. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] like Figures 1 to 9 As shown in the figure, an embodiment of the present invention provides a structural schematic diagram of a measuring stand for measuring the torque applied during transmission between permanent magnets.

[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the measuring stand includes a base 140, a rotary table 160 and two axis positioning keys 190 are provided on the base 140, and a curved knife holder 130 is movably provided on the rotary table 160.

[0042] Two axis positioning keys 190 are provided with sliding drive screws 170 and two sliding measuring rails 180. A slider platform 200 is provided above the sliding drive screws 170. A heightening pad 210 is provided above the slider platform 200. A slide rail 220 is provided above the heightening pad 210. A U-shaped bearing seat 20 is provided above the slide rail 220. A pair of bearings 21 are installed on the bearing seat 20. An A-type magnet loading shaft 40 is installed in the pair of bearings 21. An A-type magnet 2000 is installed at the front end of the A-type magnet loading shaft 40.

[0043] A flat flange bearing seat 60 is installed at one end of the curved blade holder 130. A worm gear positioning table 240, an idler wheel positioning slide 70, and an auxiliary gear are installed on the flat flange bearing seat 60. A magnet loading shaft gear 100 and an idler wheel 110 are respectively installed on the worm gear positioning table 240 and the idler wheel positioning slide 70. The magnet loading shaft gear 100 is connected to a type B magnet loading shaft 50. A type B magnet 1000 is installed on the type B magnet loading shaft 50.

[0044] A weighing rod 30 is mounted on the A-type magnet loading shaft 40. The weighing rod 30 is fastened to the A-type magnet loading shaft 40 by a headless screw 31, so that the torque on the A-type magnet loading shaft 40 is transmitted to the weighing rod 30. The weighing rod 30 is provided with an outer ring groove 32, and a load rope is wound around the outer ring groove 32. One end of the load rope is connected to the weighing rod 30, and the other end is connected to the weight. The load on the load rope is the weight G of the weight, and the load direction is tangent to the circumferential direction of the outer ring groove 32. The lever arm of the torque of the weighing rod 30 is the circumferential radius R of the outer ring groove 32. The weight G of the weight multiplied by the circumferential radius R of the outer ring groove 32 is equal to the torque M of the weighing rod 30. The type A magnet 2000 is subjected to a magnetic torque from the type B magnet 1000. The direction of this torque is opposite to the torque M exerted by the weight on the weighing rod 30. Furthermore, the type A magnet loading shaft 40 remains stationary. Therefore, the torque M exerted by the weight on the weighing rod 30 is the torque experienced by the type A magnet 2000.

[0045] The cylindrical base of the rotary table 160 is fitted with the rotary table slot 141 of the base 140 so that the rotary table 160 can rotate around the central axis of the rotary table slot 141. The rotary table 160 is also provided with a threaded lifting shaft 150. The central hole of the rotary table 160 is a rotary table threaded hole 164, which is fitted with the shaft thread 152 of the threaded lifting shaft 150 so that rotating the threaded lifting shaft 150 can control the rotary table 160 to move up and down along the vertical direction of the Z-axis, where the Z-axis is the central axis of the rotary table 160. The bottom of the slot 141 of the rotary table contacts the bottom of the threaded lifting shaft 150, thereby providing support for the threaded lifting shaft 150; the rotational orientation of the rotary table 160 is secured by a headless screw 161; the threaded lifting shaft 150 is secured by a screw 162, which is screwed into the threaded hole 142 to prevent the threaded lifting shaft 150 from sliding after its position is determined; the rotary table 160 has a first scale 166 to facilitate the determination of the rotation angle.

[0046] In this embodiment, the bearing seat 20 is provided with a shoulder 23, and the slide rail 220 is provided with a T-slot 222. The bearing seat 20 is restricted to move only in the X-axis direction by the limiting fit between the outer shape of the shoulder 23 and the outer shape of the T-slot 222. After the position of the bearing seat 20 is selected, a T-nut 221 is provided in the T-slot 222. A screw 225 passes through the bottom hole of the bearing seat 20 and engages with the T-nut 221. After the screw 225 is tightened, the position of the bearing seat 20 is fixed.

[0047] The slide rail 220 is mounted on the slider platform 200, with a heightening pad 210 sandwiched between them. The heightening pad 210 is used to increase the range of variation of the bearing seat 20 in the vertical Z-axis direction. The protrusion 225 of the slide rail 220 and the groove 211 of the heightening pad 210 are matched to limit the relative movement of the slide rail 220 and the heightening pad 210 in the horizontal direction. Four screws 224 pass through the countersunk holes at the four corners of the slide rail 220 and engage with the four threaded holes 209 of the slider platform 200 to lock them in place, thereby limiting the relative position of the slide rail 220 and the slider platform 200.

[0048] The bearing seat 20 is provided with a second scale 22 on both sides, and the slide rail 220 is also provided with a third scale 223 on both sides. During the sliding process of the bearing seat 20 and the slide rail 220, the relative position of the second scale 22 and the third scale 223 can be observed to control the sliding displacement distance.

[0049] The bottom of the slider platform 200 has two smooth through holes 201 and a threaded hole 202 in the middle. The smooth through holes 201 on both sides are clearance-fitted with the two sliding measuring rails 180, and the threaded through hole 202 in the middle is threadedly fitted with the sliding drive screw 170. That is, the two sliding measuring rails 180 and the sliding drive screw 170 are positioned by the three through holes of the two 190-axis positioning keys. The sliding drive screw 170 is preferably a trapezoidal thread, which has stability.

[0050] The plane on which the shaft positioning key 190 mates with the base 140 has a U-shaped groove 149 to define the position of the shaft positioning key 190. The shaft positioning key 190 has four countersunk holes in the vertical direction. Four screws 191 pass through one of the four countersunk holes of the shaft positioning key 190 and mate with the four threaded holes of the U-shaped groove 149, respectively. Their function is to fix the position of the shaft positioning key 190, thereby indirectly determining the relative position of the bearing seat 20 and the base 140. The slider platform 200 can be moved along the axial direction of the sliding measuring track 180 (the Y-axis direction of the base) by rotating the sliding drive screw 170.

[0051] The front end of the B-type magnet loading shaft 50 has a threaded hole, which is used with screws 57 and washers 58 to install and fasten the B-type magnet 1000. The front and rear positions of the B-type magnet 1000 can be adjusted by changing the thickness of the magnet washer 56. The B-type magnet loading shaft 50 is provided with a shoulder 51 and a scale ring 52. The outer surface of the scale ring 52 is engraved with a scale for marking the relative angle of rotation.

[0052] The B-type magnet loading shaft 50 has threads at its tail. The bearing 61 is installed via a shoulder on the B-type magnet loading shaft. Finally, a nut 54 and a perforated sleeve 63 are used to restrict the positional relationship between the B-type magnet loading shaft 50 and the flat flange bearing seat 60. Specifically, the nut 54 is tightened to press against the perforated sleeve 63, which contacts the bearing 61 to restrict the positional relationship. The through hole 64 of the perforated sleeve 63 ensures a tight contact and fixation between the magnet loading shaft gear 100 and the B-type magnet loading shaft 50. A headless screw 65 is seen installed in the threaded hole on the magnet loading shaft gear 100. Tightening the headless screw 65 ensures it passes precisely through the through hole 64 of the perforated sleeve 63, securing it tightly to the B-type magnet loading shaft 50. This method ensures that the rotation of the magnet loading shaft gear 100 is synchronized with the B-type magnet loading shaft 50.

[0053] A reading shim 120 is installed on the flat flange bearing housing 60. A perforated sleeve 63 at the tail of the type B magnet loading shaft 50 passes through the center hole 121 of the reading shim 120 to ensure that the center of the reading shim aligns with the center of the type B magnet loading shaft 50, guaranteeing the accuracy of the reading. The reading shim 120 has a pointed corner 122, which, after installation, aligns precisely with the fourth scale 133 on the cutter holder 130. The combined effect of these two features allows us to read the approximate position of the type B magnet loading shaft 50 relative to the cutter holder 130. Finally, the flat flange bearing housing 60 is installed onto the cutter holder 130 using screws 62.

[0054] The idler wheel positioning slide 70 includes a positioning slide 230, screws 231, T-nuts 232, a chimney shaft 233, an idler wheel 110, and chimney shaft screws 234. The positioning slide 230 has two threaded holes on its back, which are used to mount it to the curved knife holder 130 via two screws 231. The chimney shaft 233 has a smooth through-hole. The idler wheel 110 is fitted onto the outer surface of the chimney, and then the chimney shaft screw 234 passes through the smooth through-hole and directly engages with the T-nut 232 in the T-slot of the positioning slide 230, thus locking the position of the idler wheel 110 relative to the positioning slide 230 and enabling the two magnet loading shaft gears 100 to mesh and drive with the idler wheel 110. With this installation method, in addition to meshing and driving, the idler wheel 110 also has a range of motion that can move left, right, up, and down. This range of motion allows the two B-type magnet loading shafts 50 to be adjusted in distance, while still maintaining meshing and driving by adjusting the position of the idler wheel 110.

[0055] like Figure 7 , Figure 8 and Figure 9 As shown, the worm bearing housing 240 has two bearings, namely bearing 242 and bearing 242A. The worm shaft 241 passes through the central hole of the worm 90 and is mounted on the worm bearing housing 240 in conjunction with the two bearings. The worm bearing housing 240 has two threaded holes on its back, which are used to mount the worm shaft to the cutter holder 230 using the same method as the idler wheel 70 positioning slide. The worm 90 is connected to either of the magnet loading shaft gears 100.

[0056] The retaining member 55, retaining shaft 55A, and type B retaining member 55B combine to form a loading shaft retaining member. Its function is to stabilize the relative position of the two type B magnets 1000, which may be affected by the mutual attraction or repulsion forces during their movement. The groove 551 of the retaining member 55 and the groove 55B1 of the type B retaining member 55B respectively hold one type B magnet loading shaft 50. The retaining shaft 55A has a thread 55A0 at its tail, which is screwed into the threaded hole 55B0 of the type B retaining member 55B to adjust the telescopic distance. Finally, the retaining shaft 55A is locked in place by headless screws 550 and 55B1, thus forming the loading shaft retaining member to secure the two type B magnet loading shafts 50.

[0057] The cutter holder 130 has a curved groove 132, which nests with the convex curved platform 165 of the rotary table 160 to restrict the cutter holder 130 to rotate only around the curved groove 132. After the cutter holder 130 has rotated to its position, two screws 133 are screwed into the two threaded holes of the convex curved platform 165 and tightened to fix the positional relationship between the cutter holder 130 and the rotary table 160. The cutter holder 130 has a scale 131, and the rotary table 160 also has a scale 163; both are used to help the observer determine their rotational positional relationship. The cutter holder 130 rotates along the curved groove 132, with the center of rotation being the center O, and the radius of the curved groove 132 being Rc. Figure 2 In the front sectional view, its center O is exactly the geometric center of the section surface of the B-type magnet 1000. This function ensures that the geometric center of the section surface of the B-type magnet 1000 remains stable in the horizontal direction during the rotation of the curved blade holder 130 along the curved groove 132.

[0058] To measure the torque value experienced by a specific individual permanent magnet, the measured positional change is relative to this specific individual permanent magnet, with the positional relationships of other permanent magnets varying accordingly. For example... Figures 1 to 9 As shown, the specific process is as follows:

[0059] like Figure 1 The diagram shows the X-axis, Y-axis, Z-axis, rotation direction around the Z-axis, and rotation direction around the horizontal line that passes through the center O and intersects the Z-axis perpendicularly. An additional item is the spacing between the type B magnets 1000. Prerequisites: The type A magnet 2000 is the object being measured, and the type B magnet 1000 is the control object. The following operating procedures use two type B magnets 1000 and a single type A magnet 2000 as examples.

[0060] Magnet installation method: as follows Figure 2 and Figure 6 As shown, type A magnet 2000 is directly inserted into the hole at the front end of type A magnet loading shaft 40, and the headless screw 49 is tightened to lock the type A magnet 2000. Before installing type B magnet 1000, determine the magnet height and select a magnet shim 56 of appropriate height to ensure that its center O is exactly the geometric center of the cross-section of type B magnet 1000. Then, insert type B magnet 1000 into type B magnet loading shaft 50, making the magnet contact the magnet shim 56; next, tighten screw 57 in conjunction with shim 58 to lock type B magnet 1000. The magnetic pole direction of each magnet should be marked here for later recording.

[0061] X-axis direction: First, loosen the engagement between screw 225 and T-nut 221. Then, slide the bearing seat 20 back and forth to change the relative position of type A magnet 2000 and the two type B magnets 1000 along the X-axis. Finally, after the position is determined, tighten screw 225 and T-nut 221.

[0062] Y-axis direction: By rotating the sliding drive screw 170, the bearing seat 20 is moved left and right to change the relative position of the type A magnet 2000 and the two type B magnets 1000 along the Y-axis. Finally, after the position is determined, the sliding drive screw 170 is kept stationary.

[0063] Z-axis direction: First, loosen the headless screw 161 and screw 162. Then, rotate the threaded lifting shaft 150 to move the rotary table 160 up and down along the Z-axis, thereby changing the relative position of the type A magnet 2000 and the two type B magnets 1000 along the Z-axis. Finally, after the position is determined, tighten the headless screw 161 and screw 162 to keep the rotary table 160 and the threaded lifting shaft 150 stationary.

[0064] Rotation direction around the Z-axis: First, loosen screw 162, then rotate the rotary table 160, thereby changing the relative position of type A magnet 2000 and the two type B magnets 1000 in the direction of rotation around the Z-axis. Finally, after the position is determined, tighten screw 162 to keep the rotary table 160 stationary.

[0065] To determine the direction of rotation around the horizontal line that intersects the center O and the Z-axis perpendicularly: First, loosen the two screws 133. Then, rotate the curved blade holder 130 along the curved groove 132, thereby changing the relative position of the type A magnet 2000 and the two type B magnets 1000 around the horizontal line that intersects the center O and the Z-axis perpendicularly. Finally, after determining the position, tighten the two screws 133 to keep the curved blade holder 130 stationary.

[0066] The spacing between the B-type magnets 1000 is as follows: First, loosen the four screws 62. Then, move the two flat flange bearing seats 60 on the curved blade holder 130 to adjust the spacing between the two B-type magnets 1000. Next, tighten the four screws 62 to keep the two flat flange bearing seats 60 in a fixed position. After this, rotate the retaining shaft 55A to adjust the spacing between the retaining members 55 and 55B, and then tighten the headless screws 550 and 55B1 to lock the retaining shaft 55A. Finally, use the grooves 551 and 55B1 of the retaining members to respectively engage the B-type magnet loading shaft 50.

[0067] Composite Dimension: The above 6 operation procedures can be combined, thus creating a wide variety of situations. For example, operation procedure 1 can change the X-axis direction, and the above operation procedures can change the Y-axis direction, change the Z-axis direction, and operation procedure 4 can rotate around the Z-axis, and so on.

[0068] Torque Measurement: Torque measurement can only be performed after all the above position adjustments have been confirmed. First, mark the scale 45 and scale ring 52 to record the current rotation position. Confirm the current rotation angle of the type B magnet 1000 from the value of scale ring 52. Then, the weighing rod 30 has an outer ring 32 groove, which is used to fit a load line wrapped around its outer edge. One end of the load line is connected to the weighing rod 30, and the other end is connected to the weight. The weight of the weight is gradually increased from the minimum value. Here, the load line is light and thin enough, and strong enough, such as fishing line. Next, wait for the weighing rod 30 to reach equilibrium and come to rest. The weight G of the weight multiplied by the circumference R of the outer ring groove 32 is equal to the torque M of the weighing rod 30. The torque M is equal to the rotational torque exerted by the type B magnet 1000 on the type A magnet 2000. In addition, the current rotation angle of the type A magnet loading shaft 40 can be read through the scale 45. Finally, we can find out the rotation angle of the loading shaft 40 of the type A magnet when the torque M is applied to the weighing rod 30, and thus the corresponding relationship between the torque M and the rotation angle.

[0069] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A measuring stand for measuring the torque applied during transmission between permanent magnets, characterized in that, The measuring platform includes a base (140), on which a rotating table (160) and two shaft positioning keys (190) are provided, and a curved knife holder (130) is movably provided on the rotating table (160). The two shaft positioning keys (190) are provided with sliding drive screws (170) and two sliding measuring rails (180). A slider platform (200) is provided on the sliding drive screws (170). A heightening pad (210) is provided on the slider platform (200). A slide rail (220) is provided on the heightening pad (210). A U-shaped bearing seat (20) is provided on the slide rail (220). A pair of bearings (21) are installed on the bearing seat (20). An A-type magnet loading shaft (40) is installed in the pair of bearings (21). An A-type magnet (2000) is installed at the front end of the A-type magnet loading shaft (40). A flat flange bearing seat (60) is installed at one end of the curved blade holder (130). A worm gear positioning table (240), an idler wheel positioning slide (70), and an auxiliary gear are installed on the flat flange bearing seat (60). A magnet loading shaft gear (100) and an idler wheel (110) are respectively installed on the worm gear positioning table (240) and the idler wheel positioning slide (70). The magnet loading shaft gear (100) is connected to a type B magnet loading shaft (50). A type B magnet (1000) is provided on the type B magnet loading shaft (50). A weighing rod (30) is mounted on the type A magnet loading shaft (40). The weighing rod (30) is fastened to the type A magnet loading shaft (40) by a headless screw (31) so that the torque on the type A magnet loading shaft (40) is transmitted to the weighing rod (30). The weighing rod (30) is provided with an outer ring groove (32). A load rope is wound around the outer ring groove (32). One end of the load rope is connected to the weighing rod (30), and the other end is connected to the weight. The load on the load rope is the weight G of the weight, and the load direction is perpendicular to the circle of the outer ring groove (32). Tangent in the circumferential direction, the lever arm of the torque of the weighing rod (30) is the circumferential radius R of the outer ring groove (32), and the weight G of the weight multiplied by the circumferential radius R of the outer ring groove (32) is equal to the torque M of the weighing rod (30); the type A magnet (2000) is subjected to a magnetic torque from the type B magnet (1000), and the direction of this torque is opposite to the torque M of the weight applied to the weighing rod (30), and the loading shaft (40) of the type A magnet remains stationary, then the torque M of the weight applied to the weighing rod (30) is the torque of the type A magnet (2000).

2. The measuring stand for measuring the torque applied during transmission between permanent magnets according to claim 1, characterized in that, The cylindrical base of the rotating platform (160) is fitted with the rotating platform slot (141) of the base (140) so that the rotating platform (160) can rotate around the central axis of the rotating platform slot (141); the rotating platform (160) is also provided with a threaded lifting shaft (150). The center hole of the rotary table (160) is a rotary table threaded hole (164), which is configured to cooperate with the shaft thread (152) of the threaded lifting shaft (150) so that rotating the threaded lifting shaft (150) can control the rotary table (160) to move up and down along the vertical direction of the Z-axis, where the Z-axis is the central axis of the rotary table (160). The bottom of the slot (141) of the rotary table contacts the bottom of the threaded lifting shaft (150), thereby providing support for the threaded lifting shaft (150); the rotation direction of the rotary table (160) is tightened by a headless screw (161); the threaded lifting shaft (150) is tightened by a screw (162), which is screwed into the threaded hole (142) to prevent the threaded lifting shaft (150) from sliding after its position is determined; the rotary table (160) has a first scale (166) to facilitate the determination of the rotation angle.

3. A measuring stand for measuring the torque applied during transmission between permanent magnets according to claim 1, characterized in that, The bearing seat (20) is provided with a shoulder (23), and the slide rail (220) is provided with a T-slot (222). The bearing seat (20) is restricted to move only in the X-axis direction by the limiting fit between the outer shape of the shoulder (23) and the outer shape of the T-slot (222). After the position of the bearing seat (20) is selected, a T-nut (221) is provided in the T-slot (222). A screw (225) passes through the bottom hole of the bearing seat (20) and engages with the T-nut (221). After the screw (225) is tightened, the position of the bearing seat (20) is fixed.

4. A measuring stand for measuring the torque applied during transmission between permanent magnets according to claim 1, characterized in that, The heightening pad (210) is used to increase the range of variation of the bearing seat (20) in the vertical Z-axis direction; the protrusion (225) of the slide rail (220) and the groove (211) of the heightening pad (210) are matched to limit the relative movement of the slide rail (220) and the heightening pad (210) in the horizontal direction; four screws (224) pass through the countersunk holes at the four corners of the slide rail (220) and engage with the four threaded holes (209) of the slider platform (200) to lock, thereby limiting the relative position of the slide rail (220) and the slider platform (200).

5. A measuring stand for measuring the torque applied during transmission between permanent magnets according to claim 1, characterized in that, The bearing seat (20) is provided with a second scale (22) on both sides, and the slide rail (220) is also provided with a third scale (223) on both sides. During the sliding process of the bearing seat (20) and the slide rail (220), the relative position of the second scale (22) and the third scale (223) can be observed to control the sliding displacement distance.

6. A measuring stand for measuring the torque applied during transmission between permanent magnets according to claim 1, characterized in that, The slider platform (200) has two smooth through holes (201) and a threaded hole (202) in the middle at the bottom. The two smooth through holes (201) are respectively clearance-fitted with the two sliding measuring rails (180), and the threaded through hole (202) in the middle is threadedly fitted with the sliding drive screw (170); the sliding drive screw (170) has a trapezoidal thread. The plane on which the shaft positioning key (190) mates with the base (140) has a U-shaped groove (149) to define the position of the shaft positioning key (190). The shaft positioning key (190) is provided with four countersunk holes in the vertical direction. Four screws (191) pass through one of the four countersunk holes of the shaft positioning key (190) and engage with the four threaded holes of the U-shaped groove (149) to fix the position of the shaft positioning key (190), thereby indirectly determining the relative position of the bearing seat (20) and the base (140).

7. A measuring stand for measuring the torque applied during transmission between permanent magnets according to claim 1, characterized in that, The front end of the B-type magnet loading shaft (50) has a threaded hole, which is used with screws (57) and washers (58) to install and fasten the B-type magnet (1000). The front and rear positions of the B-type magnet 1000 can be adjusted by changing the thickness of the magnet washer (56). The type B magnet loading shaft (50) is provided with a shoulder (51) and a scale ring (52). The outer surface of the scale ring (52) is engraved with a scale for marking the relative angle of rotation.

8. A measuring stand for measuring the torque applied during transmission between permanent magnets according to claim 1, characterized in that, A reading shim (120) is installed on the flat flange bearing seat (60). The perforated sleeve (63) at the tail of the B-type magnet loading shaft (50) passes through the center hole (121) of the reading shim (120) to ensure that the center of the reading shim is consistent with the center of the B-type magnet loading shaft (50) and to ensure the reading accuracy of the reading shim (120). The reading shim (120) is provided with a sharp corner (122) so that after installation, the position of the sharp corner is exactly aligned with the fourth scale (133) on the curved knife holder (130).

9. A measuring stand for measuring the torque applied during transmission between permanent magnets according to claim 1, characterized in that, The curved blade holder (130) is provided with a curved groove (132), which is nested and engaged with the convex curved platform (165) of the rotary table (160) to limit the curved blade holder (130) to rotate only around the curved groove (132).

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