End face grinding machine for circular and rectangular magnetic cores

Abstract

The end face grinding machine comprises a mounting plate, a first wheel set and a grinding belt, the first wheel set comprises four first contact wheels, the four first contact wheels are divided into the left side and the right side, and the left side and the right side are each provided with two first contact wheels to form a parallelogram mechanism in a combined mode; a second wheel set is arranged on the outer side of the first wheel set and comprises a plurality of second contact wheels, the second contact wheels are rotationally arranged on the mounting plate, the second contact wheels are in transmission connection with the first contact wheels through a grinding belt, and the grinding belt forms a first grinding part on the inner sides of the two first contact wheels on the left side; second grinding parts are formed on the inner sides of the two first contact wheels on the right side, and an adjusting assembly and a driving component are arranged on the mounting plate. The technical problems that existing grinding equipment cannot grind the two end faces of a magnetic core air gap at the same time, and the grinding efficiency is not high are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of grinding equipment, and in particular relates to an end surface grinding machine for circular and rectangular magnetic cores. Background Art

[0002] Circular and rectangular magnetic materials are widely used in many fields, including electronics, electrical, mechanical, medical, communications, etc. In order to reduce the magnetic permeability of the magnetic circuit, make the magnetic flux more sensitive to the change of current, and improve the sensitivity of the magnetic components, air gaps are cut on the circular and rectangular cores during the production process of rectangular and circular cores.

[0003] After the core air gap is cut, the end surface may be uneven, with defects such as burrs and cracks. These defects will affect the electromagnetic performance of the core, reduce the consistency of inductance, and even cause damage to the core. Therefore, it is necessary to use grinding equipment to grind the end surface of the core.

[0004] Existing magnetic core grinding equipment mainly grinds the magnetic core air gap by moving the grinding belt driven by the contact wheel. However, since the magnetic core air gap is similar to a notch, the existing grinding equipment can only grind one side in sequence by the grinding belt, and cannot grind the two end faces of the magnetic core air gap at the same time, which is inefficient. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an end face grinding machine for circular and rectangular magnetic cores, so as to solve the technical problem that the existing grinding equipment can only grind the end faces of the magnetic core air gap one by one through the grinding belt, but cannot grind the two end faces of the magnetic core air gap at the same time, resulting in low grinding efficiency.

[0006] To achieve the aforementioned invention objective, the technical solution adopted by the present invention includes: an end surface grinding machine for circular and rectangular magnetic cores, comprising a mounting plate, a first wheel group and a grinding belt, wherein the first wheel group comprises four first contact wheels, the four first contact wheels are divided into left and right sides, two first contact wheels are arranged on the left and right sides to form a parallelogram mechanism, and the two first contact wheels on the right side are rotatably connected to the mounting plate; A second wheel group is arranged outside the first wheel group, the second wheel group includes a plurality of second contact wheels, the plurality of second contact wheels are rotatably arranged on the mounting plate, the second contact wheels are connected to the first contact wheels through a grinding belt transmission, when the grinding belt is wound, a first grinding portion is formed on the inner side of the two first contact wheels on the left side, and a second grinding portion is formed on the inner side of the two first contact wheels on the right side, and the first grinding portion and the second grinding portion are arranged opposite to each other along the vertical direction; An adjusting component for adjusting the position of the first contact wheel on the left side to change the angle of the parallelogram mechanism is provided on the mounting plate, and a driving component for driving the first contact wheel and the second contact wheel to rotate synchronously is also provided on the mounting plate.

[0007] Compared with the prior art, the advantages of the present invention include: (1) The end face grinding machine for circular and rectangular magnetic cores provided by the present invention involves fewer component structures, is convenient to maintain, and has a lower cost.

[0008] (2) The end face grinding machine for circular and rectangular magnetic cores provided by the present invention adjusts the angle of the parallelogram mechanism through the adjusting component to change the distance between the first grinding part and the second grinding part, so as to adapt to the grinding requirements of the air gaps of magnetic cores with different widths; In addition, since the first grinding part and the second grinding part are located inside the first contact wheel, when the angle of the parallelogram mechanism changes to cause the distance between the first grinding part and the second grinding part to change, the minimum distance between the first grinding part and the second grinding part can be adjusted to zero (i.e., the first grinding part and the second grinding part coincide). Compared with the case where at least one of the first grinding part and the second grinding part is located outside (the minimum distance should be the diameter of the first contact wheel), the adjustment range is larger, so that it can have better adaptability to magnetic cores with a narrower air gap width.

[0009] (3) The end face grinding machine for circular and rectangular magnetic cores provided by the present invention can simultaneously grind the two end faces of the magnetic core air gap on the opposite sides of the first grinding part and the second grinding part, with higher efficiency. And the relative sides of the first grinding part and the second grinding part can also grind the side faces of the magnetic core, providing various grinding methods and having better practicability; In addition, the above two grinding methods make both sides of the grinding belt be utilized, improving the utilization rate of the grinding belt.

[0010] (4) Since the first grinding part and the second grinding part are kept parallel, the parallelism of the two end faces after grinding is relatively high, reducing the possibility of inclination of the two end faces after grinding and having a better grinding effect; In addition, when the angle of the parallelogram mechanism changes, the parallel state of the first grinding part and the second grinding part remains unchanged, that is, when the distance between the first grinding part and the second grinding part is changed by adjusting the angle of the parallelogram mechanism, the flat grinding of the end faces of the magnetic core air gap can still be continued, so that the parallelism of the two end faces after grinding is still relatively good.

[0011] (5) Through the setting of the winding method of the grinding belt on the first contact wheel and the second contact wheel, only one grinding belt can realize the double-sided grinding of the magnetic core air gap, reducing the use of the grinding belt and lowering the production cost; In addition, since the perimeter of the parallelogram mechanism remains unchanged, when the position of the first contact wheel on the left side changes, the tension state of the grinding belt will not be changed, so that a good grinding effect can be continuously maintained.

[0012] Furthermore, a first connecting rod is arranged between the two first contact wheels on the upper side. The two ends of the first connecting rod are respectively hinged to the axial center positions of the two first contact wheels on the upper side. A second connecting rod is arranged between the two first contact wheels on the lower side. The two ends of the second connecting rod are respectively hinged to the axial center positions of the two first contact wheels on the lower side. A third connecting rod is arranged between the two first contact wheels on the left side. The two ends of the third connecting rod are respectively hinged to the axial center positions of the two first contact wheels on the left side. A parallelogram mechanism is formed by combining the first connecting rod, the second connecting rod, the third connecting rod and the four first contact wheels; The adjusting assembly includes a screw rod and a slider. The screw rod is rotatably arranged on the mounting plate along the vertical direction. The screw rod is located on the left side of the parallelogram mechanism. The slider is sleeved on the screw rod and is connected with the screw rod through a threaded fit. The left side of the second connecting rod extends leftward and is movably connected with the slider. By rotating the screw rod, the slider can move on the screw rod, and then the angle of the second connecting rod changes.

[0013] Furthermore, a mounting frame is arranged between the first connecting rod and the second connecting rod. The two ends of the mounting frame are respectively hinged to the middle positions of the first connecting rod and the second connecting rod. A rotating disk is rotatably arranged on the mounting frame. The rotating disk is arranged vertically. A plurality of clamping components for fixing the magnetic core are arranged along the circumferential direction of the rotating disk. By rotating the rotating disk, the two end faces of the magnetic core can be abutted against the opposite sides of the first grinding part and the second grinding part.

[0014] Furthermore, the clamping component includes a clamping part and a placing table for placing the magnetic core. The placing table is arranged at the edge position of the rotating disk along the diameter direction of the rotating disk; The clamping part includes a rotating rod and a push rod. The middle part of the rotating rod is hinged to the rotating disk. A clamping block is arranged at one end of the rotating rod close to the placing table, and the other end is movably connected with the push rod. The push rod is slidably arranged on the rotating disk along the diameter direction of the rotating disk. By pushing the push rod to slide along the diameter direction of the rotating disk, the clamping block can be moved away from or close to the placing table; The mounting frame is provided with a cam mechanism capable of pushing the push rod to slide, and the cam mechanism includes a disc cam and an elastic member. The disc cam is fixed on the mounting frame and is coaxially arranged with the rotating disk. The wheel surface of the disc cam has a recessed section and a circumferential section. The recessed section is located on the side of the disc cam opposite to the grinding belt. When the push rod is away from the rotating rod and one end pushes against the recessed section, the clamping block is in a relaxed state with respect to the magnetic core. When the push rod is away from the rotating rod and one end pushes against the circumferential section, the clamping block is in a clamped state with respect to the magnetic core. The elastic member is arranged between the push rod and the mounting disk, and the elastic member can make the push rod away from the rotating rod and one end always push against the wheel surface of the disc cam.

[0015] Furthermore, an intermittent motion mechanism is provided on the mounting frame, and the continuous operation of the intermittent motion mechanism can make the rotating disk rotate intermittently at a predetermined angle, and the predetermined angle is adapted to the number of sets of the clamping components.

[0016] Furthermore, the intermittent motion mechanism includes a groove wheel mechanism, which includes a groove wheel and a dial that cooperates with the groove wheel. The groove wheel and the dial are both rotatably arranged on a mounting frame, the groove wheel is coaxially fixedly connected to a rotating disk, a worm gear structure is arranged between the dial and a driving component, the worm wheel is coaxially connected to the dial, the worm gear is meshed with the worm wheel, and the worm gear is transmission-connected to the driving component. The worm gear structure can be driven to operate through the driving component, thereby enabling the intermittent motion mechanism to operate.

[0017] Further, the driving component includes a motor, which is mounted on a mounting plate and fixedly connected to the axis of any one of the second contact wheels. A transmission wheel assembly is arranged between the motor and the worm, and the transmission wheel assembly includes a first transmission wheel, a second transmission wheel and a third transmission wheel. The first transmission wheel is coaxially connected to the motor output shaft, the second transmission wheel is movably arranged on the mounting plate via an elastic component, the third transmission wheel is coaxially connected to the worm, and the first transmission wheel, the second transmission wheel and the third transmission wheel are arranged in a triangle shape and are connected through a transmission member.

[0018] Furthermore, a reduction mechanism is provided between the motor and the transmission wheel assembly, and the reduction mechanism makes the rotation speed of the motor output shaft greater than the rotation speeds of the first transmission wheel, the second transmission wheel and the third transmission wheel.

[0019] Furthermore, the clamping block is made of rubber material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Structural schematic of an embodiment of the present invention Figure 1 ; Figure 2 Structural schematic of an embodiment of the present invention Figure 2 ; Figure 3 Structural schematic of an embodiment of the present invention Figure 3 ; Figure 4 Structural schematic of the rotating disk and the clamping member; Figure 5 Structural schematic of the parallelogram mechanism and the grinding belt.

[0022] Reference numerals: Magnetic core 1, mounting plate 2, grinding belt 3, first contact wheel 4, second contact wheel 5, first grinding part 6, second grinding part 7, first connecting rod 8, second connecting rod 9, third connecting rod 10, screw 11, slider 12, mounting bracket 13, rotating disk 14, placement table 15, rotating rod 16, push rod 17, clamping block 18, movable rod 19, disk cam 20, elastic member 21, concave section 22, circumferential section 23, release position 24, placement position 25, grinding position 26, grooved wheel 27, dial 28, worm and worm gear structure 29, motor 30, first transmission wheel 31, second transmission wheel 32, third transmission wheel 33, transmission member 34, elastic component 35. Detailed implementation manners

[0023] In view of the deficiencies in the prior art, the inventors of this case have, through long-term research and a large number of practices, been able to propose the technical solution of the present invention. The following will further explain the technical solution, its implementation process and principle, etc. in combination with the drawings in the embodiments of the present application and specific implementation cases.

[0024] It should be noted that the embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as a limitation to the present invention. The described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, the present invention covers any alternatives, modifications, equivalent methods and solutions made within the spirit, principle and scope of the present invention defined by the claims. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] In the description of the present application, terms such as "first", "second", "third" and similar words do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "one" do not denote a quantity limitation, but indicate the presence of at least one. Words such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0026] In the description of the present application, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, when using position terms such as both sides, outer side, upper and lower, etc., it should be understood that they are only used for easy understanding and description, considering that the structure may be facing other positions.

[0027] In the description of the present application, unless otherwise clearly specified and defined, the technical terms or scientific terms used should have the ordinary meaning understood by those of ordinary skill in the art to which the present application pertains. Terms such as "installed", "connected", "coupled", etc. should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or in contact connection or integral connection; for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] Please refer to Figures 1-5 , the present invention provides a technical solution: an end face grinding machine for circular and rectangular magnetic cores, comprising a mounting plate 2, a first wheel set and a grinding belt 3. It should be noted that, as Figure 1 shown, the magnetic core drawn in the figures of this embodiment is a rectangular magnetic core, but the circular magnetic core is also applicable in this embodiment.

[0029] As Figure 1 or 5 shows, the first wheel set includes four first contact wheels 4. The four first contact wheels 4 are divided into left and right sides, and two first contact wheels 4 are arranged on both the left and right sides to form a parallelogram mechanism in combination. The two first contact wheels 4 on the right side are rotatably connected to the mounting plate 2.

[0030] A second round of groups is arranged outside the first round of groups. The second round of groups includes a plurality of second contact wheels 5, and the plurality of second contact wheels 5 are all rotatably arranged on the mounting plate 2. A grinding belt 3 is drivingly connected between the second contact wheels 5 and the first contact wheels 4. When the grinding belt 3 is wound, a first grinding portion 6 is formed inside the two left first contact wheels 4, and a second grinding portion 7 is formed inside the two right first contact wheels 4. The first grinding portion 6 and the second grinding portion 7 are arranged opposite to each other in the vertical direction.

[0031] When the two left first contact wheels 4 move, the overall mechanism deforms into a parallelogram with different included angles. When the included angle changes, the opposite sides always remain parallel. After the angle of the parallelogram mechanism changes, the distance between the first grinding portion 6 and the second grinding portion 7 can be changed, so as to adapt to the grinding requirements of the air gaps of magnetic cores 1 with different widths.

[0032] In addition, since the first grinding portion 6 and the second grinding portion 7 are located inside the first contact wheels 4, when the angle of the parallelogram mechanism changes to make the distance between the first grinding portion 6 and the second grinding portion 7 change, the minimum distance between the first grinding portion 6 and the second grinding portion 7 can be adjusted to zero (that is, the first grinding portion 6 and the second grinding portion 7 coincide). Compared with the case where at least one of the first grinding portion 6 and the second grinding portion 7 is located outside (the minimum distance should be the diameter of the first contact wheel 4), the adjustment range is larger, so that the adaptability to the magnetic core 1 with a narrower air gap width is better.

[0033] As Figure 1 Or as shown in FIG. 5, in this embodiment, the number of the second contact wheels 5 is four, and the four second contact wheels 5 surround the outside of the four first contact wheels 4. It should be noted that in the present invention, the number and position of the second contact wheels 5 are not limited, as long as the grinding belt 3 can form a first grinding portion 6 inside the two left first contact wheels 4 and a second grinding portion 7 inside the two right first contact wheels 4 by changing the winding mode of the grinding belt 3, but the installation position of the second contact wheels 5 should not interfere with the use of the first grinding portion 6 and the second grinding portion 7.

[0034] The first grinding part 6 and the second grinding part 7 are strip-shaped structures in the vertical direction, and the first grinding part 6 and the second grinding part 7 can always remain parallel when the angle of the parallelogram mechanism changes. When grinding the magnetic core 1, the opposite sides of the first grinding part 6 and the second grinding part 7 can simultaneously grind the two end faces of the air gap of the magnetic core 1, with relatively high efficiency. Moreover, the relative sides of the first grinding part 6 and the second grinding part 7 can also grind the side face of the magnetic core 1, providing multiple grinding methods and good practicability. The above two grinding methods make both sides of the grinding belt 3 utilized, improving the utilization rate of the grinding belt 3. In addition, since the first grinding part 6 and the second grinding part 7 remain parallel, the parallelism of the two end faces after grinding is relatively high, reducing the possibility of inclination of the two end faces after grinding and having a better grinding effect. Further, when the angle of the parallelogram mechanism changes, the first grinding part 6 and the second grinding part 7 can always remain parallel, that is, when changing the distance between the first grinding part 6 and the second grinding part 7 (by adjusting the angle of the parallelogram mechanism), it is still possible to continue to maintain smooth grinding of the air gap end face of the magnetic core 1, so that the parallelism of the two end faces after grinding is still relatively high.

[0035] In addition to the above description, through the setting of the winding method of the grinding belt 3 on the first contact wheel 4 and the second contact wheel 5, only one grinding belt 3 can achieve double-sided grinding of the air gap of the magnetic core 1, reducing the use of the grinding belt 3 and lowering the production cost; and since the perimeter of the parallelogram mechanism remains unchanged, when the position of the left first contact wheel 4 changes, the tension state of the grinding belt 3 will not be changed, so that a better grinding effect can be continuously maintained.

[0036] An adjustment component for adjusting the position of the left first contact wheel 4 to change the angle of the parallelogram mechanism is provided on the mounting plate 2. After the adjustment component adjusts the angle of the parallelogram mechanism, a locking state can be formed to make the parallelogram mechanism relatively fixed.

[0037] A driving component for driving the first contact wheel 4 and the second contact wheel 5 to rotate synchronously is also provided on the mounting plate 2. Specifically, the driving component has the following specific driving methods: by driving any one of the second contact wheels 5 or any one of the first contact wheels 4 to rotate, and then making all the first contact wheels 4 and all the second contact wheels 5 rotate synchronously under the action of the grinding belt 3; by driving any one of the second contact wheels 5 or any one of the first contact wheels 4 to rotate, and by setting a synchronous transmission mechanism, such as a synchronous belt or a belt, between all the first contact wheels 4 and all the second contact wheels 5, to achieve synchronous rotation of the first contact wheel 4 and the second contact wheel 5.

[0038] Such as Figure 1 and 5As shown in the figure, in this embodiment: A first connecting rod 8 is arranged between the two upper first contact wheels 4. The two ends of the first connecting rod 8 are respectively hinged to the axial center positions of the two upper first contact wheels 4. A second connecting rod 9 is arranged between the two lower first contact wheels 4. The two ends of the second connecting rod 9 are respectively hinged to the axial center positions of the two lower first contact wheels 4. A third connecting rod 10 is arranged between the two left first contact wheels 4. The two ends of the third connecting rod 10 are respectively hinged to the axial center positions of the two left first contact wheels 4. Through the first connecting rod 8, the second connecting rod 9 and the third connecting rod 10, the four first contact wheels 4 are combined to form a parallelogram mechanism.

[0039] The adjusting assembly includes a screw rod 11 and a slider 12. The screw rod 11 is rotatably arranged on the mounting plate 2 along the vertical direction. The screw rod 11 is located on the left side of the parallelogram mechanism. The slider 12 is sleeved on the screw rod 11 and is connected to the screw rod 11 through a threaded fit. The left side of the second connecting rod 9 extends leftward and is movably connected to the slider 12. By rotating the screw rod 11, the slider 12 can move on the screw rod 11, thereby changing the angle of the second connecting rod 9. Specifically, the screw rod 11 is installed on the mounting plate 2 through two mounting seats. A limiting rod is arranged between the two mounting plates 2. The upper end of the limiting rod is fixedly connected to one of the mounting seats, and the lower end extends downward through the slider 12 and is connected to the other mounting seat. The left side of the second connecting rod 9 extends leftward to form a connecting portion. A first strip-shaped through hole is formed in the connecting portion. The length direction of the first strip-shaped through hole is consistent with the length direction of the second connecting rod 9. A connecting column is slidably arranged inside the first strip-shaped through hole, and the connecting column is fixedly connected to the slider 12.

[0040] Rotate the screw rod 11, the slider 12 moves along the length direction of the screw rod 11. The movement of the slider 12 drives the connecting column to move synchronously. During the movement of the connecting column, it pushes the second connecting rod 9 to rotate, causing the angle of the parallelogram mechanism to change. When the connecting column pushes the second connecting rod 9 to rotate, it also moves inside the first strip-shaped through hole, and there will be no interference between the connecting column and the second connecting rod 9.

[0041] Of course, the adjusting assembly is not limited to the above structure. As long as it is a structure that can drive the second connecting rod 9 to rotate, those skilled in the art should consider it. For example, a hydraulic push rod, an electric push rod and other pushing structures. The pushing structure is installed on the mounting plate 2, and the pushing end of the pushing structure is movably connected to the extending portion of the second connecting rod 9.

[0042] Such as Figure 1 and 2As shown in the figure, in this embodiment: An installation frame 13 is provided between the first connecting rod 8 and the second connecting rod 9. Both ends of the installation frame 13 are respectively hinged to the middle positions of the first connecting rod 8 and the second connecting rod 9. A rotating disk 14 is rotatably arranged on the installation frame 13. The rotating disk 14 is arranged vertically, and a plurality of clamping components for fixing the magnetic core 1 are evenly arranged along the circumferential direction of the rotating disk 14. By rotating the rotating disk 14, the two end faces of the magnetic core 1 can abut against the opposite sides of the first grinding part 6 and the second grinding part 7. After placing the magnetic core 1 on the rotating disk 14 and clamping and fixing it with the clamping components, rotating the rotating disk 14 can make the two end faces of the magnetic core 1 abut against the opposite sides of the first grinding part 6 and the second grinding part 7. The operation of the grinding belt 3 will grind the two end faces of the magnetic core 1.

[0043] It should be noted that when the adjusting assembly adjusts the angle of the parallelogram mechanism, it will synchronously drive the installation frame 13 to move. Since both ends of the installation frame 13 are respectively hinged to the middle positions of the first connecting rod 8 and the second connecting rod 9, the displacement distances of the installation frame 13 in the vertical direction and the horizontal direction are half of the displacement distances of the two first contact wheels 4 on the left side in the vertical direction and the horizontal direction. Thus, it can adapt to the position changes of the two first contact wheels 4 on the left side, so that when the clamped and fixed magnetic core 1 is being ground, the end face of the magnetic core 1 can always contact the opposite sides of the first grinding part 6 and the second grinding part 7, and grinding can continue. This reduces the step of correspondingly adjusting the clamping position of the magnetic core 1 after the positions of the first grinding part 6 and the second grinding part 7 change due to the position changes of the two first contact wheels 4 on the left side, and the operation is simpler.

[0044] As Figure 1 and 4 shown in the figure, in this embodiment: The clamping component includes a clamping part and a placement table 15 for placing the magnetic core 1. The placement table 15 is arranged at the edge position of the rotating disk 14 along the diameter direction of the rotating disk 14. The placement table 15 has a placement surface parallel to the diameter direction of the rotating disk 14, and the placement surface is attached to the bottom surface of the magnetic core 1.

[0045] The clamping part includes a rotating rod 16 and a push rod 17. The middle of the rotating rod 16 is hinged to the rotating disk 14. The rotating rod 16 forms a lever structure. By prying one end of the rotating rod 16, the other end of the rotating rod 16 can rotate in the opposite direction. A clamping block 18 is arranged at one end of the rotating rod 16 close to the placing table 15, and the other end is movably connected to the push rod 17. That is, a second strip-shaped through hole is formed at the end of the rotating rod 16 far from the clamping block 18. An activity rod 19 is slidably arranged in the second strip-shaped through hole, and the activity rod 19 is hinged to the push rod 17. The push rod 17 is slidably arranged on the rotating disk 14 along the diameter direction of the rotating disk 14. By pushing the push rod 17 to slide along the diameter direction of the rotating disk 14, the clamping block 18 can be moved away from or close to the placing table 15. When the clamping block 18 is close to the placing table 15, the magnetic core 1 placed on the placing table 15 can be gradually clamped. When the clamping block 18 is away from the placing table 15, the clamping of the magnetic core 1 can be gradually released.

[0046] A cam mechanism capable of pushing the push rod 17 to slide is arranged on the mounting frame 13. The cam mechanism includes a disk-shaped cam 20 and an elastic member 21. The disk-shaped cam 20 is fixed on the mounting frame 13 and is coaxially arranged with the rotating disk 14. The cam surface of the disk-shaped cam 20 has a concave section 22 and a circumferential section 23. The concave section 22 is located on the side of the disk-shaped cam 20 opposite to the grinding belt 3. When the end of the push rod 17 far from the rotating rod 16 abuts against the concave section 22, the clamping block 18 is in a relaxed state with respect to the magnetic core 1. When the end of the push rod 17 far from the rotating rod 16 abuts against the circumferential section 23, the clamping block 18 is in a clamped state with respect to the magnetic core 1. The elastic member 21 is arranged between the push rod 17 and the mounting disk. Through the elastic member 21, the end of the push rod 17 far from the rotating rod 16 can always abut against the cam surface of the disk-shaped cam 20. The elastic member 21 is a first spring. The first spring is sleeved outside the push rod 17. One end of the first spring is connected to the push rod 17, and the other end is connected to the rotating disk 14.

[0047] As Figure 1 and 4As shown, when the clamping component is at the concave section 22, it has a release position 24 and a placement position 25. When at the release position 24, the placement table 15 inclines towards the lower right. When at the placement position 25, the placement table 15 is in a horizontal position. When the clamping component is at the release position 24, the clamping of the magnetic core 1 by the clamping component changes from being clamped to being loose, enabling the magnetic core 1 to automatically slide down under the action of gravity, realizing the automatic collection of the magnetic core 1. When the clamping component is at the placement position 25, the magnetic core 1 is placed on the placement table 15, and then the rotating disk 14 is rotated counterclockwise. The wheel surface of the disk cam 20 rises from the concave section 22 to the circumferential section 23. The disk cam 20 will then push the push rod 17 to move away from the disk cam 20, causing the clamping block 18 to move towards the placement table 15 to clamp the magnetic core 1. At the same time, the magnetic core 1 moves towards the disk cam 20 under the influence of gravity and leans against the edge of the rotating disk 14, and will not fall off due to gravity before being stably clamped. When placing the magnetic core 1 on the clamping component, the clamping component is located on the side of the rotating disk 14 away from the grinding belt 3, which can reduce the interference caused by components such as the grinding belt 3 and make it more convenient to place the magnetic core 1. Additionally, it should be noted that the grinding position 26 of the clamping component on the rotating disk 14 is relative to the placement position 25.

[0048] As Figure 2 and 3 shown, in this embodiment: an intermittent motion mechanism is provided on the mounting bracket 13. The operation of the intermittent motion mechanism will cause the rotating disk 14 to rotate intermittently at a predetermined angle. The setting of the predetermined angle is adapted to the number of sets of the clamping components. For example, if the number of sets of the clamping components is 4, the rotation angle is 90 degrees; if the number of sets of the clamping components is 6, the rotation angle is 60 degrees. In this embodiment, the number of sets of the clamping components is 6 groups, so the predetermined angle should be 60 degrees. After the rotating disk 14 rotates 60 degrees, it will stop for a certain period of time. During this period, the magnetic core 1 can be placed at the placement position 25 and the magnetic core 1 can be ground at the grinding position 26, which provides time for the staff to place the magnetic core 1 and also provides time for the grinding of the magnetic core 1, enabling the end face grinding work of the magnetic core 1 to be carried out in an orderly manner and helping to improve the grinding efficiency. At the same time, during the rotation, the magnetic core 1 reaching the release position 24 can automatically slide down under gravity, realizing automatic blanking. After the stop time ends, it rotates 60 degrees and repeats the previous step. By cycling in this way, continuous feeding, blanking, and grinding of the magnetic core 1 can be achieved.

[0049] As Figure 2 and 3As shown, in this embodiment: the intermittent motion mechanism includes a groove wheel 27 mechanism, the groove wheel 27 mechanism includes a groove wheel 27 and a dial 28 matched with the groove wheel 27, the groove wheel 27 and the dial 28 are both rotatably arranged on the mounting frame 13, and the groove wheel 27 is coaxially fixedly connected with the rotating disk 14. Specifically, the dial 28 is a disk with a cylindrical pin, which rotates continuously as an input end, and a locking arc is arranged on the dial 28, and the locking arc cooperates with the concave arc of the non-working surface of the groove wheel 27 to limit the rotation of the groove wheel 27 in the non-driving stage. When the dial 28 rotates, the cylindrical pin is embedded in the groove of the groove wheel 27, pushing the groove wheel 27 to rotate a certain angle (60 degrees in this embodiment), and after the cylindrical pin is separated from the groove, the locking arc clamps the concave arc of the groove wheel 27 to keep it stationary until the next drive.

[0050] A worm gear structure 29 is provided between the dial 28 and the driving component. The worm wheel is coaxially connected with the dial 28, the worm is meshed with the worm wheel, and the worm is connected with the driving component. The driving component can drive the worm gear structure 29 to operate, thereby making the intermittent motion mechanism operate. The groove wheel 27 mechanism is connected to the driving component through the worm gear structure 29. While the driving component drives the first contact wheel 4 and the second contact wheel 5 to rotate synchronously, the worm gear structure 29 drives the groove wheel 27 mechanism to operate so that the rotating disk 14 rotates intermittently, realizing continuous loading, unloading and grinding. The automation level is high, and the driving source for driving the groove wheel 27 mechanism to operate is reduced, which saves energy and reduces costs. In addition, the worm gear structure 29 makes the groove wheel 27 mechanism run slowly, increases the grinding and loading time of the magnetic core 1, and the self-locking nature of the worm gear structure 29 makes the groove wheel 27 mechanism move in one direction.

[0051] like Figure 3 As shown, in this embodiment: the driving component includes a motor 30, which is mounted on the mounting plate 2 and fixedly connected to the axis of any second contact wheel 5. A transmission wheel assembly is arranged between the motor 30 and the worm, and the transmission wheel assembly includes a first transmission wheel 31, a second transmission wheel 32 and a third transmission wheel 33. The first transmission wheel 31 is coaxially connected to the output shaft of the motor 30, and the second transmission wheel 32 is movably arranged on the mounting plate 2 through an elastic component 35. Specifically, the elastic component 35 includes a second spring, one end of the second spring is hinged to the axis of the second transmission wheel 32, and the other end is hinged to the mounting plate 2. The third transmission wheel 33 is coaxially connected to the worm, and the first transmission wheel 31, the second transmission wheel 32 and the third transmission wheel 33 are arranged in a triangular shape and are connected through a transmission member 34. The specific transmission member 34 is a chain, a synchronous belt, a belt, etc.

[0052] Since the worm is installed on the mounting bracket 13, during the process of the adjusting member adjusting the parallelogram mechanism, the movement of the mounting bracket 13 will synchronously drive the movement of the worm. The movement of the worm only allows it to move up, down, left, and right along the surface of the mounting plate 2, and the front and rear positions will not change. Therefore, by movably arranging the second transmission wheel 32 on the mounting plate 2 through the elastic component 35, it can better adapt to the position change of the worm, and the transmission ratio among the first transmission wheel 31, the second transmission wheel 32, and the third transmission wheel 33 is relatively stable. If the transmission wheel assembly is arranged on the side of the mounting plate 2 facing away from the grinding belt 3, an opening penetrating the mounting plate 2 in the thickness direction needs to be opened on the mounting plate 2 to enable the worm to move within the opening.

[0053] In this embodiment: A speed reduction mechanism is provided between the motor 30 and the transmission wheel assembly. Through the speed reduction mechanism, the rotational speed of the output shaft of the motor 30 is greater than the rotational speeds of the first transmission wheel 31, the second transmission wheel 32, and the third transmission wheel 33. Furthermore, the rotational speeds of the first contact wheel 4 and the second contact wheel 5 are greater than the rotational speed of the dial 28, making the operation of the Geneva wheel mechanism 27 slower, and further increasing the grinding and feeding time of the magnetic core 1. It should be understood that the speed reduction mechanism can be a planetary gear speed reduction mechanism, etc.

[0054] In this embodiment: In order to improve the clamping effect of the clamping block 18 and provide additional buffer protection for the magnetic core 1, the clamping block 18 is made of rubber material.

[0055] It should be understood that the above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An end surface grinding machine for circular and rectangular magnetic cores, comprising a mounting plate, a first wheel set and a grinding belt, characterized in that: The first wheel group includes four first contact wheels, which are divided into left and right sides, and two first contact wheels are arranged on each side to form a parallelogram mechanism, and the two first contact wheels on the right side are rotatably connected to the mounting plate; A second wheel group is arranged outside the first wheel group, the second wheel group includes a plurality of second contact wheels, the plurality of second contact wheels are rotatably arranged on the mounting plate, the second contact wheels are connected to the first contact wheels through a grinding belt transmission, when the grinding belt is wound, a first grinding portion is formed on the inner side of the two first contact wheels on the left side, and a second grinding portion is formed on the inner side of the two first contact wheels on the right side, and the first grinding portion and the second grinding portion are arranged opposite to each other along the vertical direction; The mounting plate is provided with an adjusting component for adjusting the position of the left first contact wheel to change the angle of the parallelogram mechanism, and the mounting plate is also provided with a driving component for driving the first contact wheel and the second contact wheel to rotate synchronously.

2. An end surface grinding machine for circular and rectangular magnetic cores according to claim 1, characterized in that: A first connecting rod is provided between the two first contact wheels on the upper side, and the two ends of the first connecting rod are respectively hinged to the axis positions of the two first contact wheels on the upper side; a second connecting rod is provided between the two first contact wheels on the lower side, and the two ends of the second connecting rod are respectively hinged to the axis positions of the two first contact wheels on the lower side; a third connecting rod is provided between the two first contact wheels on the left side, and the two ends of the third connecting rod are respectively hinged to the axis positions of the two first contact wheels on the left side; a parallelogram mechanism is formed by the combination of the first connecting rod, the second connecting rod, the third connecting rod and the four first contact wheels; The adjustment assembly includes a screw and a slider. The screw is rotatable along the vertical direction and is arranged on the mounting plate. The screw is located on the left side of the parallelogram mechanism. The slider is sleeved on the screw and is connected to the screw through a threaded fit. The left side of the second connecting rod extends to the left and is movably connected to the slider. The slider can be moved on the screw by rotating the screw, thereby changing the angle of the second connecting rod.

3. An end surface grinding machine for circular and rectangular magnetic cores according to claim 2, characterized in that: A mounting frame is arranged between the first connecting rod and the second connecting rod, and two ends of the mounting frame are respectively hinged to the middle positions of the first connecting rod and the second connecting rod. The mounting frame is rotatably provided with a rotating disk, and the rotating disk is vertically arranged. A plurality of clamping components for fixing the magnetic core are evenly arranged along the circumferential direction of the rotating disk. By rotating the rotating disk, the two end faces of the magnetic core can be abutted against the opposite sides of the first grinding part and the second grinding part.

4. The end surface grinding machine for circular and rectangular magnetic cores according to claim 3, characterized in that: The clamping component includes a clamping portion and a placement table for placing the magnetic core, and the placement table is arranged at the edge of the rotating disk along the diameter direction of the rotating disk; The clamping part includes a rotating rod and a push rod, the middle part of the rotating rod is hinged with the rotating disk, a clamping block is arranged at one end of the rotating rod close to the placement table, and the other end is movably connected with the push rod, and the push rod is slidably arranged on the rotating disk along the diameter direction of the rotating disk, and the clamping block can be moved away from or close to the placement table by pushing the push rod to slide along the diameter direction of the rotating disk; The mounting frame is provided with a cam mechanism capable of pushing the push rod to slide, and the cam mechanism includes a disc cam and an elastic member. The disc cam is fixed on the mounting frame and is coaxially arranged with the rotating disk. The wheel surface of the disc cam has a recessed section and a circumferential section. The recessed section is located on the side of the disc cam opposite to the grinding belt. When the push rod is away from the rotating rod and one end pushes against the recessed section, the clamping block is in a relaxed state with respect to the magnetic core. When the push rod is away from the rotating rod and one end pushes against the circumferential section, the clamping block is in a clamped state with respect to the magnetic core. The elastic member is arranged between the push rod and the mounting disk, and the elastic member can make the push rod away from the rotating rod and one end always push against the wheel surface of the disc cam.

5. The end surface grinding machine for circular and rectangular magnetic cores according to claim 4, characterized in that: The mounting frame is provided with an intermittent motion mechanism, and the continuous operation of the intermittent motion mechanism enables the rotating disk to intermittently rotate at a predetermined angle, and the predetermined angle is adapted to the number of sets of the clamping components.

6. The end surface grinding machine for circular and rectangular magnetic cores according to claim 5, characterized in that: The intermittent motion mechanism includes a groove wheel mechanism, which includes a groove wheel and a dial matched with the groove wheel. The groove wheel and the dial are both rotatably arranged on the mounting frame, the groove wheel is coaxially fixedly connected to the rotating disk, a worm gear structure is arranged between the dial and the driving component, the worm wheel is coaxially connected to the dial, the worm is meshed with the worm wheel, and the worm is transmission-connected to the driving component. The worm gear structure can be driven to operate through the driving component, thereby making the intermittent motion mechanism operate.

7. An end surface grinding machine for circular and rectangular magnetic cores according to claim 6, characterized in that: The driving component includes a motor, which is mounted on a mounting plate and fixedly connected to the axis of any one of the second contact wheels. A transmission wheel assembly is arranged between the motor and the worm, and the transmission wheel assembly includes a first transmission wheel, a second transmission wheel and a third transmission wheel. The first transmission wheel is coaxially connected to the motor output shaft, the second transmission wheel is movably arranged on the mounting plate through an elastic component, the third transmission wheel is coaxially connected to the worm, and the first transmission wheel, the second transmission wheel and the third transmission wheel are arranged in a triangle shape and are connected through transmission members.

8. An end surface grinding machine for circular and rectangular magnetic cores according to claim 7, characterized in that: A speed reduction mechanism is provided between the motor and the transmission wheel assembly, and the speed reduction mechanism makes the rotation speed of the motor output shaft greater than the rotation speeds of the first transmission wheel, the second transmission wheel and the third transmission wheel.

9. An end surface grinding machine for circular and rectangular magnetic cores according to claim 8, characterized in that: The clamping block is made of rubber material.

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