Machining and forming device for winding common mode inductor magnetic core
By fine polishing the inductive core, the problem of unsmooth surface of the arc-shaped inductive core is solved, the performance and stability of the inductor are improved, and the coordination accuracy with other components and the reliability of electronic equipment is enhanced.
Patent Information
- Application Number
- CN202510591203.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2025-08-08
AI Technical Summary
The prior art is difficult to effectively process arc-shaped inductive cores, resulting in uneven surface surface and uneven curvature, which affects inductive performance and stability.
The process forming device consisting of a support table, a processing rotating mechanism, a limiting mechanism, an adjustment mechanism, an adapting mechanism and a grinding mechanism is used to finely polish the inductive magnetic core to ensure that each surface is uniformly treated.
The surface quality of the inductor core is improved, hysteresis and eddy current losses are reduced, the efficiency and stability of the inductor are enhanced, and the coordination accuracy with other components and the stability of electronic equipment is ensured.
Smart Images
Figure CN120453035A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of inductor core processing, and in particular relates to a processing and forming device for a wound common-mode inductor core. Background Art
[0002] Common-mode inductors play a vital role in electronic devices and are often used to suppress electromagnetic interference (EMI), particularly in circuits with strict EMC requirements, such as switching power supplies, communications equipment, and computer motherboards. They effectively filter out common-mode noise, improving circuit stability and reliability, ensuring proper operation and minimizing interference with other devices. Ferrite materials are hard and brittle, making them prone to surface unevenness and dimensional deviation during the molding and sintering processes. This necessitates surface leveling and trimming of the inductor core.
[0003] However, in the existing process of processing the inductor core, only the flat inductor core can be processed and trimmed, and some inductor cores are curved. When facing the curved inductor core, it will result in that the contour of the curved core cannot be well fitted, and the curved shape of the core may be destroyed during the processing, making its surface rough and the curvature uneven. Summary of the Invention
[0004] An embodiment of the present invention provides a device for processing and forming a wound common-mode inductor core to solve the problems in the prior art.
[0005] The embodiment of the present invention adopts the following technical solution: a processing and forming device for a wound common-mode inductor core, comprising a support table, a processing rotation mechanism provided on the top of the support table, and a rotational connection between the processing rotation mechanism and the support table; a processing limiting mechanism for limiting the inductor core is provided on the processing rotation mechanism, and the processing limiting mechanism and the processing rotation mechanism are rotationally matched; a support frame is provided on the top of the support table, a processing adjustment mechanism is provided on the support frame, and the processing adjustment mechanism is rotationally connected to the support frame; the processing adjustment mechanism is provided with two adjustment ends, and each adjustment end is provided with a processing adaptation mechanism, and the processing adaptation mechanism is slidingly matched with the adjustment end, and the processing adaptation mechanism is provided with a processing polishing mechanism.
[0006] A further technical solution is that the processing rotating mechanism includes a rotating motor, a rotating ring and a rotating platform. The rotating ring is located at the bottom of the rotating platform. The rotating platform is rotatably connected to the top position of the support platform through the rotating ring. The rotating motor is located at the bottom of the support platform and the main shaft of the rotating motor is connected to the rotating platform.
[0007] A further technical solution is that the processing limit mechanism includes a limit motor, a mounting disk, two sliding plates and two sliding columns, the mounting disk is horizontally arranged on the top of the rotating platform, the limit motor is located inside the rotating platform, a rotating disk with a rotatable connection is provided inside the mounting disk, the rotating disk is connected to the main shaft of the limit motor, two arc grooves are provided on the rotating disk, the two sliding columns are respectively arranged at the bottom of the two sliding plates, the sliding columns slide in the arc grooves, two notches are provided on the mounting disk, and the two sliding plates are horizontally slidably connected in the two notches.
[0008] A further technical solution is that each of the sliding plates is provided with two sliding grooves, one of which is provided with a sliding screw, the sliding screw is rotatably connected to the sliding plate, a sliding motor is provided on the side wall of the sliding plate, a fixed plate is provided on the top of the sliding plate, the bottom of the fixed plate is threadedly connected to the sliding screw, and the bottom of the fixed plate slides in cooperation with the other sliding groove.
[0009] A further technical solution is that a rotating disk with a rotatable connection is provided on the fixed plate, a horizontally arranged supporting bar is provided on the rotating disk, four anti-slip columns are provided on the side wall of the rotating disk, and a rotating motor is provided on one of the fixed plates with a transmission connection to the rotating disk.
[0010] A further technical solution is that the processing adjustment mechanism includes an adjustment motor, an adjustment gear and two adjustment rack plates. The adjustment motor is located at the top of the support frame, the adjustment gear is connected to the main shaft of the adjustment motor, the two adjustment rack plates are symmetrically slidably connected to the bottom of the support frame, the two adjustment rack plates are meshed with the adjustment gear, and the end of each adjustment rack plate is provided with a vertically arranged placement frame.
[0011] According to a further technical solution, a lifting electric cylinder is provided in the placement frame, and a mounting frame is provided on the telescopic end of the lifting electric cylinder.
[0012] A further technical solution is that the processing adaptation mechanism includes a mobile electric cylinder, a slide rail, a slider, a sliding wheel, a sliding shaft and a horizontal plate. The mobile electric cylinder is horizontally arranged on the side wall of the mounting frame, the slide rail is horizontally arranged on the side wall of the mounting frame, the slider is slidably connected to the slide rail and is connected to the telescopic end of the mobile electric cylinder, an L-shaped sliding groove is provided on the side wall of the mounting frame, the sliding shaft is rotatably connected to the slider, one end of the sliding shaft is provided with a flip plate, the sliding wheel is rotatably connected to the flip plate and slides in the sliding groove, and the horizontal plate is located at the other end of the sliding shaft.
[0013] According to a further technical solution, the processing and grinding mechanism includes a grinding motor and a grinding roller, the grinding motor is located on a horizontal plate, and the grinding roller is connected to the main shaft of the grinding motor.
[0014] The at least one technical solution adopted in the embodiment of the present invention can achieve the following beneficial effects: Finely polishing all surfaces of the inductor core improves its surface quality, reducing surface defects and roughness. This helps reduce hysteresis and eddy current losses during operation, improving the efficiency and stability of the inductor. For example, polishing the sides and vertical surfaces of the core ensures closer and more uniform contact between the core and the winding, reducing magnetic flux leakage and thus improving inductor performance. Polishing different surfaces of the core ensures precise fit with other components and enhances compatibility. For example, polishing the horizontal surface of the core allows for a better fit with the circuit board surface, reducing mounting gaps and improving the stability and reliability of the entire electronic device. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the processing rotation mechanism in the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the processing limit mechanism in the present invention Figure 1 ; Figure 5 Schematic diagram of the three-dimensional structure of the processing limit mechanism in the present invention Figure 2 ; Figure 6 Schematic diagram of the three-dimensional structure of the processing adjustment mechanism and the processing adaptation mechanism in the present invention; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 for Figure 6 Enlarged view of point B in the middle; Figure 9 Schematic diagram of the inductor core to be processed in the present invention.
[0016] Reference numerals: Support table 1, support frame 11, processing rotation mechanism 2, rotating motor 21, rotating ring 22, rotating platform 23, processing limit mechanism 3, limit motor 30, mounting plate 31, sliding plate 32, sliding column 33, rotating plate 34, arc groove 35, notch 36, slide 37, sliding screw 38, sliding motor 39, fixed plate 40, rotating plate 41, bearing bar 42, anti-slip column 43, rotating motor 44, processing adjustment mechanism 5, adjustment motor 51, adjustment gear 52, adjustment rack plate 53, placement frame 54, lifting electric cylinder 55, mounting frame 56, sliding groove 57, processing adaptation mechanism 6, moving electric cylinder 61, slide rail 62, slider 63, sliding wheel 64, sliding shaft 65, horizontal plate 66, flip plate 67, processing grinding mechanism 7, grinding motor 71, grinding roller 72. DETAILED DESCRIPTION
[0017] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0018] The following describes in detail a technical solution of a device for processing and forming a wound common-mode inductor core according to various embodiments of the present invention in conjunction with the accompanying drawings.
[0019] Reference Figures 1 to 9 As shown, an embodiment of the present invention provides a processing and forming device for a wound common-mode inductor core, comprising a support table 1, a processing rotation mechanism 2 being provided on the top of the support table 1, and the processing rotation mechanism 2 being rotatably connected to the support table 1; a processing limiting mechanism 3 for limiting the inductor core is provided on the processing rotation mechanism 2, and the processing limiting mechanism 3 is rotatably matched with the processing rotation mechanism 2, a support frame 11 being provided on the top of the support table 1, a processing adjustment mechanism 5 being provided on the support frame 11, and the processing adjustment mechanism 5 being rotatably connected to the support frame 11, and the processing adjustment mechanism 5 being provided with two adjustment ends, and each of the adjustment ends being provided with a processing adaptation mechanism 6, and the processing adaptation mechanism 6 is slidably matched with the adjustment end, and a processing polishing mechanism 7 is provided on the processing adaptation mechanism 6.
[0020] The following are targeted in this application Figure 9 The inductor core shown is processed.
[0021] Specifically, the processing rotating mechanism 2 includes a rotating motor 21, a rotating ring 22 and a rotating platform 23. The rotating ring 22 is located at the bottom of the rotating platform 23. The rotating platform 23 is rotatably connected to the top position of the support table 1 through the rotating ring 22. The rotating motor 21 is located at the bottom of the support table 1 and the main shaft of the rotating motor 21 is connected to the rotating platform 23.
[0022] When processing the inductor core, the rotating motor 21 drives the rotating platform 23 to rotate on the support platform 1 through the rotating ring 22, which will drive the inductor core to be processed for processing, and the grinding roller 72 can grind each surface in turn to ensure that all surfaces can be evenly processed, improve the overall flatness and smoothness of the core, avoid local inadequate grinding or inconsistent grinding degree, thereby ensuring the dimensional accuracy and shape accuracy of the core, which is beneficial to improving the performance stability and consistency of the inductor; multiple surfaces can be polished in one clamping, reducing the positioning error caused by multiple clamping, and further improving the processing accuracy and efficiency.
[0023] Specifically, the processing limit mechanism 3 includes a limit motor 30, a mounting disk 31, two sliding plates 32 and two sliding columns 33. The mounting disk 31 is horizontally arranged on the top of the rotating platform 23. The limit motor 30 is located inside the rotating platform 23. A rotating disk 34 with a rotatable connection is provided in the mounting disk 31. The rotating disk 34 is connected to the main shaft of the limit motor 30. Two arc grooves 35 are provided on the rotating disk 34. The two sliding columns 33 are respectively arranged at the bottom of the two sliding plates 32. The sliding columns 33 slide in the arc grooves 35. Two notches 36 are provided on the mounting disk 31. The two sliding plates 32 are horizontally slidably connected in the two notches 36.
[0024] Specifically, each sliding plate 32 is provided with two sliding grooves 37, one of which is provided with a sliding screw 38, and the sliding screw 38 is rotatably connected to the sliding plate 32. A sliding motor 39 is provided on the side wall of the sliding plate 32, and a fixed plate 40 is provided on the top of the sliding plate 32. The bottom of the fixed plate 40 is threadedly connected to the sliding screw 38, and the bottom of the fixed plate 40 is slidably matched with the other sliding groove 37.
[0025] Specifically, the fixed plate 40 is provided with a rotating disk 41 that is rotatably connected, the rotating disk 41 is provided with a horizontally arranged support bar 42, and the side walls of the rotating disk 41 are provided with four anti-slip columns 43. One of the fixed plates 40 is provided with a rotating motor 44 that is transmission-connected to the rotating disk 41. The anti-slip columns 43 can protect the inductor core and prevent damage to the side walls of the inductor core during clamping. The rotating motor 44 drives the rotating disk 41 to rotate on the fixed plate 40. During the process of polishing different positions of the inductor core, the two rotating disks 41 can be driven to rotate and flip, thereby driving the inductor core to flip, so that different positions of the inductor core can be polished.
[0026] After the two ends of the inductor core are placed on the two supporting bars 42 respectively, the limit motor 30 is driven to drive the rotating disk 34 to rotate in the mounting disk 31, which in turn drives the two sliding posts 33 to rotate through the two arc-shaped slots 35 on the rotating disk 34, thereby driving the two sliding plates 32 to move horizontally relative to or towards each other in the two notches 36 on the mounting disk 31. The movement of the two sliding plates 32 will respectively drive the two fixed plates 40 to move, thereby clamping and fixing the inductor core; When clamping and fixing different side walls of the inductor core, the spacing between the two fixing plates 40 can be adjusted. At this time, the sliding motor 39 drives the sliding screw 38 to rotate, thereby driving the fixing plate 40 to move in the sliding groove 37 on the sliding plate 32, thereby adjusting the spacing between the two fixing plates 40. During grinding, the two sliding motors 39 work simultaneously and can also drive the corresponding two sliding plates 32 to move synchronously. The movement of the two sliding plates 32 can drive the position of the inductor core to move relative to the position of the grinding roller 72, thereby grinding different positions on the inductor core; it helps to improve processing accuracy and meet the complex shape and size requirements of different inductor cores; it can make the contact between the grinding roller 72 and the surface of the inductor core more uniform, and the applied grinding force is relatively stable, thereby achieving uniform grinding of different positions of the inductor core; it can also flexibly adjust the movement range and speed of the sliding plate 32 according to the different specifications and shapes of the inductor core, so as to adapt to the processing of various types of inductor cores. Whether it is a small, medium or large inductor core, effective grinding of different positions can be achieved by adjusting the relevant parameters.
[0027] Specifically, the processing adjustment mechanism 5 includes an adjustment motor 51, an adjustment gear 52 and two adjustment rack plates 53. The adjustment motor 51 is located at the top of the support frame 11, and the adjustment gear 52 is connected to the main shaft of the adjustment motor 51. The two adjustment rack plates 53 are symmetrically slidably connected to the bottom of the support frame 11. The two adjustment rack plates 53 are meshed with the adjustment gear 52, and the end of each adjustment rack plate 53 is provided with a vertically arranged placement frame 54.
[0028] The adjustment motor 51 drives the adjustment gear 52 to rotate, which in turn drives the two adjustment rack plates 53 to rotate at the bottom of the support frame 11, thereby driving the positions of the two grinding rollers 72 to move relative to or toward each other, and fitting the position of the grinding roller 72 to the side of the side wall of the inductor core to smooth the burrs on the side wall. In the face of different sizes of inductor cores and different spacing positions of adjacent side walls that need to be polished, the motor 51 can be adjusted to make adjustments. The motor can be precisely controlled to make the polishing tool accurately reach the specified position for fine polishing to avoid accidentally touching other parts; it can flexibly adapt to the processing of inductor cores of various specifications. Whether it is a large-sized core or a small-sized core, and side walls with different spacings, the processing mode can be quickly switched by adjusting the parameters of the motor 51, without the need to replace a large number of fixtures or equipment, thereby reducing production costs and time costs.
[0029] Specifically, a lifting electric cylinder 55 is provided in the placement frame 54 , and a mounting frame 56 is provided on the telescopic end of the lifting electric cylinder 55 .
[0030] During grinding, the lifting electric cylinder 55 drives the mounting frame 56 to move downward, thereby driving the grinding roller 72 to move downward, thereby grinding and leveling the inductor core.
[0031] Specifically, the processing adaptation mechanism 6 includes a mobile electric cylinder 61, a slide rail 62, a slider 63, a sliding wheel 64, a sliding shaft 65 and a horizontal plate 66. The mobile electric cylinder 61 is horizontally arranged on the side wall of the mounting frame 56, and the slide rail 62 is horizontally arranged on the side wall of the mounting frame 56. The slider 63 is slidably connected to the slide rail 62 and is connected to the telescopic end of the mobile electric cylinder 61. An L-shaped sliding groove 57 is provided on the side wall of the mounting frame 56. The sliding shaft 65 is rotatably connected to the slider 63. A flip plate 67 is provided at one end of the sliding shaft 65. The sliding wheel 64 is rotatably connected to the flip plate 67 and slides in the sliding groove 57. The horizontal plate 66 is located at the other end of the sliding shaft 65.
[0032] When grinding the two sides of the inductor core or the vertical surface, the mobile electric cylinder 61 drives the slider 63 to move horizontally on the slide rail 62. The movement of the slider 63 drives the sliding shaft 65 to move horizontally, thereby driving the flip plate 67 to rotate so that the sliding wheel 64 rotates in the sliding groove 57. The position of the sliding wheel 64 is rotated until the sliding groove 57 is in the uppermost vertical position. At this time, the horizontal plate 66 is in a horizontal state, so that the grinding roller 72 is in a vertical state, and the two sides of the inductor core or the vertical surface can be ground. When grinding the horizontal surface of the inductor core, the moving electric cylinder 61 drives the slider 63 to move horizontally on the slide rail 62. The movement of the slider 63 drives the sliding shaft 65 to move horizontally, thereby driving the flip plate 67 to rotate so that the sliding wheel 64 rotates in the sliding groove 57. The position of the sliding wheel 64 is rotated until the sliding groove 57 is at the horizontal position of the lower sliding groove 57. At this time, the horizontal plate 66 is in a horizontal state, thereby making the grinding roller 72 in a horizontal state, and the horizontal surface of the inductor core can be ground. When the arc surface of the inductor core is polished, the polishing roller 72 can be driven to swing back and forth within 0-90 degrees, thereby polishing the arc surface of the inductor core.
[0033] Finely polishing all surfaces of the inductor core improves its surface quality, reducing surface defects and roughness. This helps reduce hysteresis and eddy current losses during operation, improving the efficiency and stability of the inductor. For example, polishing the sides and vertical surfaces of the core ensures closer and more uniform contact between the core and the winding, reducing magnetic flux leakage and thus improving inductor performance. Polishing different surfaces of the core ensures precise fit with other components and enhances compatibility. For example, polishing the horizontal surface of the core allows for a better fit with the circuit board surface, reducing mounting gaps and improving the stability and reliability of the entire electronic device.
[0034] Specifically, the processing and grinding mechanism 7 includes a grinding motor 71 and a grinding roller 72 . The grinding motor 71 is located on the horizontal plate 66 , and the grinding roller 72 is connected to the main shaft of the grinding motor 71 .
[0035] When the inductor core is being polished, the polishing motor 71 drives the polishing roller 72 to rotate, thereby polishing and leveling the burrs on the side wall of the inductor core.
[0036] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.
Claims
1. A device for processing and forming a wound common-mode inductor core, characterized in that: The invention comprises a support platform (1), wherein a processing rotation mechanism (2) is provided on the top of the support platform (1), and the processing rotation mechanism (2) is rotatably connected to the support platform (1); a processing limit mechanism (3) for limiting the position of the inductor core is provided on the processing rotation mechanism (2), and the processing limit mechanism (3) and the processing rotation mechanism (2) are rotatably matched; a support frame (11) is provided on the top of the support platform (1), and a processing adjustment mechanism (5) is provided on the support frame (11), and the processing adjustment mechanism (5) is rotatably connected to the support frame (11); the processing adjustment mechanism (5) is provided with two adjustment ends, and each adjustment end is provided with a processing adaptation mechanism (6), and the processing adaptation mechanism (6) is slidably matched with the adjustment end, and the processing adaptation mechanism (6) is provided with a processing grinding mechanism (7).
2. The device for processing and forming a wound common-mode inductor core according to claim 1, characterized in that: The machining rotation mechanism (2) comprises a rotating motor (21), a rotating ring (22) and a rotating platform (23), wherein the rotating ring (22) is located at the bottom of the rotating platform (23), and the rotating platform (23) is rotatably connected to the top position of the support platform (1) through the rotating ring (22), and the rotating motor (21) is located at the bottom of the support platform (1), and the main shaft of the rotating motor (21) is connected to the rotating platform (23).
3. The device for processing and forming a wound common-mode inductor core according to claim 2, characterized in that: The processing limit mechanism (3) includes a limit motor (30), a mounting plate (31), two sliding plates (32) and two sliding columns (33), wherein the mounting plate (31) is horizontally arranged on the top of the rotating platform (23), the limit motor (30) is located inside the rotating platform (23), a rotating plate (34) connected in rotation is provided in the mounting plate (31), the rotating plate (34) is connected to the main shaft of the limit motor (30), two arc grooves (35) are provided on the rotating plate (34), the two sliding columns (33) are respectively arranged at the bottom of the two sliding plates (32), the sliding columns (33) slide in the arc grooves (35), the mounting plate (31) is provided with two notches (36), and the two sliding plates (32) are horizontally slidably connected in the two notches (36).
4. The device for processing and forming a wound common-mode inductor core according to claim 3, characterized in that: Each of the sliding plates (32) is provided with two sliding grooves (37), wherein a sliding screw (38) is provided in one of the sliding grooves (37), and the sliding screw (38) is rotatably connected to the sliding plate (32). A sliding motor (39) is provided on the side wall of the sliding plate (32) and is transmission-connected to the sliding screw (38). A fixed plate (40) is provided on the top of the sliding plate (32), and the bottom of the fixed plate (40) is threadedly connected to the sliding screw (38). The bottom of the fixed plate (40) is slidably matched with the other sliding groove (37).
5. The device for processing and forming a wound common-mode inductor core according to claim 4, characterized in that: The fixed plate (40) is provided with a rotating disk (41) that is rotatably connected thereto. The rotating disk (41) is provided with a horizontally arranged supporting bar (42). Four anti-skid columns (43) are provided on the side wall of the rotating disk (41). One of the fixed plates (40) is provided with a rotating motor (44) that is transmission-connected to the rotating disk (41).
6. The device for processing and forming a wound common-mode inductor core according to claim 1, characterized in that: The processing adjustment mechanism (5) includes an adjustment motor (51), an adjustment gear (52) and two adjustment rack plates (53), wherein the adjustment motor (51) is located at the top of the support frame (11), the adjustment gear (52) is connected to the main shaft of the adjustment motor (51), and the two adjustment rack plates (53) are symmetrically slidably connected to the bottom of the support frame (11), and the two adjustment rack plates (53) are meshed with the adjustment gear (52), and a vertically arranged placement frame (54) is provided at the end of each adjustment rack plate (53).
7. The device for processing and forming a wound common-mode inductor core according to claim 6, characterized in that: A lifting electric cylinder (55) is provided in the placement frame (54), and a mounting frame (56) is provided on the telescopic end of the lifting electric cylinder (55).
8. The device for processing and forming a wound common-mode inductor core according to claim 7, characterized in that: The processing adaptation mechanism (6) includes a mobile electric cylinder (61), a slide rail (62), a slider (63), a sliding wheel (64), a sliding shaft (65) and a horizontal plate (66), wherein the mobile electric cylinder (61) is horizontally arranged on the side wall of the mounting frame (56), the slide rail (62) is horizontally arranged on the side wall of the mounting frame (56), the slider (63) is slidably connected to the slide rail (62) and connected to the telescopic end of the mobile electric cylinder (61), an L-shaped sliding groove (57) is provided on the side wall of the mounting frame (56), the sliding shaft (65) is rotatably connected to the slider (63), one end of the sliding shaft (65) is provided with a flip plate (67), the sliding wheel (64) is rotatably connected to the flip plate (67) and slides in the sliding groove (57), and the horizontal plate (66) is located at the other end of the sliding shaft (65).
9. The device for processing and forming a wound common-mode inductor core according to claim 8, characterized in that: The processing and grinding mechanism (7) comprises a grinding motor (71) and a grinding roller (72); the grinding motor (71) is located on the horizontal plate (66); and the grinding roller (72) is connected to the main shaft of the grinding motor (71).