Grinding head driving structure and edging machine

Abstract

The application discloses a grinding head driving structure, comprising: a mounting seat, wherein a mounting cavity is arranged on the mounting seat; a permanent magnet motor, wherein a stator of the permanent magnet motor is fixedly connected in the mounting cavity, and the stator is in abutment with a circumferential side wall of the mounting cavity; a main shaft, wherein the main shaft is rotatably installed in the mounting cavity through a main bearing, and the main shaft is connected with a rotor of the permanent magnet motor; a first end of the main shaft protrudes from the mounting cavity and is used for connecting a grinding tool; and a cooling system, wherein the cooling system is configured to cool the mounting seat, so as to indirectly and simultaneously cool the permanent magnet motor and the main bearing. The grinding head driving structure provided by the application improves production efficiency, reduces volume and weight, and can solve the problem of heat generation increase caused by high rotation speed, and ensure continuous high rotation speed work. The application further discloses an edging machine applying the grinding head driving structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of production equipment of ceramic tiles, glass, stone, metal plates and other materials, and particularly relates to a grinding head driving structure and an edge grinding machine. BACKGROUND

[0002] In the existing ceramic tile production equipment, the conventional ceramic grinding head or ceramic polishing head is driven by a common motor through a belt or a shaft coupling to transmit torque, which has the problems of easy belt wear, large size of the driving device, low production efficiency and high failure rate.

[0003] Therefore, it is necessary to provide a new grinding head driving structure that can meet high speed, low energy consumption and good cooling effect. SUMMARY

[0004] In order to overcome at least one of the defects of the prior art, the present application provides a grinding head driving structure, which improves production efficiency, reduces size and weight, and solves the problem of heat generation caused by high speed.

[0005] The technical scheme adopted by the present application to solve the problems is:

[0006] A grinding head driving structure comprises:

[0007] A mounting seat is provided with a mounting cavity;

[0008] A permanent magnet motor, the stator of the permanent magnet motor is fixedly connected in the mounting cavity, and the stator abuts against the circumferential side wall of the mounting cavity;

[0009] A main shaft is rotatably installed in the mounting cavity through a main bearing, and the main shaft is connected with the rotor of the permanent magnet motor, the first end of the main shaft protrudes from the mounting cavity and is used for connecting a grinding tool;

[0010] A cooling system is configured to cool the mounting seat to indirectly cool the permanent magnet motor and the main bearing at the same time.

[0011] The grinding head driving structure provided by the present application directly drives the main shaft to rotate by using the permanent magnet motor, and the permanent magnet motor and the main bearing are arranged in the mounting cavity of the mounting seat, and the cooling system is used for cooling the mounting seat to indirectly cool the permanent magnet motor and the main bearing at the same time. Through the organic combination of multiple characteristics, the lightweight improvement and high speed improvement of the grinding head driving structure are realized, and the problem of heat generation caused by high speed is solved, ensuring continuous high speed work without the need for speed reduction or shutdown cooling, greatly improving the production efficiency, and the overall structure is simple.

[0012] Further, the cooling system comprises a cooling flow channel surrounding the mounting cavity.

[0013] Further, the cooling system comprises a cooling fan, which is in transmission connection with the main shaft and can at least cool the outer surface of the mounting seat.

[0014] Further, the second end of the main shaft protrudes into the mounting cavity and is connected with the cooling fan.

[0015] Further, the mounting seat comprises a sliding sleeve, a first end disc and a second end disc, the sliding sleeve has a mounting cavity which is open at both ends, the first end disc and the second end disc are respectively installed at both ends of the mounting cavity, the rotor sleeve is arranged outside the main shaft and is in transmission connection with the main shaft, and the first end of the main shaft passes through the first end disc and is exposed outward.

[0016] The first end disc can axially position the main bearing, and the second end disc can axially position the stator of the permanent magnet motor, so as to realize the positioning and installation of the permanent magnet motor and the main bearing. Of course, preferably, the first end disc and the second end disc can also have a sealing function, so as to effectively seal the mounting cavity and prevent dust in the working environment from entering the mounting cavity to affect the permanent magnet motor and the main bearing.

[0017] Further, the main shaft is also rotatably installed on the second end disc through a secondary bearing, the main bearing is located between the first end disc and the permanent magnet motor, and the permanent magnet motor is located between the main bearing and the secondary bearing. In this way, the permanent magnet motor is located between the main bearing and the secondary bearing, and the secondary bearing is directly installed in the second end disc, which can greatly reduce the length of the entire grinding head driving structure and the overall volume, and further realize miniaturization.

[0018] Further, a positioning spacer is arranged in the mounting cavity and is clamped between the stator and the second end disc.

[0019] Further, a plurality of through holes are arranged in the circumferential side wall of the mounting cavity, and at least one lead-through groove is recessed inward on the end face of each end of the mounting cavity, the lead-through groove and the through hole are connected in series to form a cooling flow channel, and a sealing plate is embedded in the opening end of the lead-through groove.

[0020] Further, the first end disc or the second end disc abuts against the sealing plate.

[0021] Further, a plurality of through holes are arranged in the circumferential side wall of the mounting cavity, and at least one lead-through groove is arranged on each of the first end disc and the second end disc, the lead-through groove and the through hole are connected in series to form a cooling flow channel.

[0022] In this way, in the above two schemes, a plurality of through holes are arranged in the circumferential side wall of the mounting cavity, and the lead-through groove and the through hole are connected in series to form a cooling flow channel, which effectively improves the efficiency and uniformity of heat exchange, avoids local uneven heat dissipation, and is convenient to process.

[0023] Further, the cooling flow channel is further connected with an inlet and an outlet, the inlet is arranged on the first end plate or the second end plate, and the outlet is arranged on the first end plate or the second end plate.

[0024] Further, the stator comprises a stator core, the stator core abuts against the circumferential side wall of the mounting cavity, or the stator comprises a stator core and a shell, the shell is sleeved on the stator core, and the shell abuts against the circumferential side wall of the mounting cavity.

[0025] Further, the feeding assembly and the machine base are further included, the mounting seat is slidably arranged on the machine base, and the feeding assembly is arranged between the machine base and the mounting seat to drive the mounting seat to slide relative to the machine base.

[0026] Based on the same concept, the application further discloses an edging machine, which comprises the grinding head driving structure as described above.

[0027] In summary, the grinding head driving structure and the edging machine provided by the application have the following technical effects:

[0028] 1) The permanent magnet motor is used to directly drive the main shaft to rotate, the permanent magnet motor and the main bearing are arranged in the mounting cavity of the mounting seat, and the cooling system is used to indirectly cool the permanent magnet motor and the main bearing through the cooling effect of the mounting seat. Specifically, the cooling can be realized by using liquid cooling and / or air cooling. Through the organic combination of multiple features, the light weight improvement and high speed improvement of the grinding head driving structure are realized, and the problem of heat generation caused by high speed is solved, so that the continuous high speed operation can be ensured without the need of speed reduction or shutdown cooling. The production efficiency is greatly improved, and the overall structure is simple;

[0029] 2) The two end plates are used to realize the axial positioning of the main bearing and the stator, and the effective sealing of the mounting cavity is further realized, so that the dust in the working environment is prevented from entering the mounting cavity to affect the permanent magnet motor and the main bearing. Meanwhile, the permanent magnet motor is located between the main bearing and the secondary bearing, and the secondary bearing is directly arranged in the second end plate, so that the length of the entire grinding head driving structure can be greatly reduced, and the overall volume can be reduced, and the miniaturization is further realized.

[0030] 3) The plurality of through holes are arranged in the circumferential side wall of the mounting cavity, and the cooling flow channel is formed by the mutual connection of the through holes and the through grooves, so that the heat exchange efficiency and the uniformity of heat exchange are effectively improved, and the local uneven heat dissipation is avoided, and the processing is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a cross-sectional view of the grinding head driving structure of the embodiment 1 of the application;

[0032] Figure 2 is a cross-sectional view of the mounting seat of the embodiment 1 of the application.

[0033] Figure 3 The left view schematic diagram of the mounting seat corresponding to the first end face of the embodiment 1 of the application;

[0034] Figure 4 The right view schematic diagram of the mounting seat corresponding to the second end face of the embodiment 1 of the application;

[0035] Figure 5 The structural schematic diagram of the second end disc of the embodiment 1 of the application;

[0036] Figure 6 The explosion schematic diagram of the sliding sleeve connected with the sealing plate of the embodiment 1 of the application;

[0037] Figure 7 The sectional view schematic diagram of the grinding head driving structure of the embodiment 2 of the application.

[0038] In the drawings, the meanings of the reference signs are as follows:

[0039] 1, mounting seat; 101, first end face; 102, second end face; 11, mounting cavity; 111, first stepped hole; 112, second stepped hole; 113, third stepped hole; 114, fourth stepped hole; 12, cooling flow channel; 121, through hole; 122, through groove; 123, oil hole; 124, screw hole; 13, first end disc; 131, first sealing ring; 14, second end disc; 141, liquid inlet; 142, liquid outlet; 143, oil inlet; 144, accommodating groove; 145, shaft hole; 146, second sealing ring; 15, sealing plate; 16, cooling fan; 17, fan cover; 18, sliding sleeve; 2, permanent magnet motor; 21, stator; 22, rotor; 3, main shaft; 4, main bearing; 5, adapter block; 6, secondary bearing; 7, feeding assembly; 8, machine base; 9, positioning spacer sleeve. DETAILED DESCRIPTION

[0040] In order to better understand and implement, the technical solutions in the embodiments of the application will be clearly and completely described below in combination with the drawings in the embodiments of the application.

[0041] In the description of the application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0043] Embodiment 1

[0044] With reference to Figure 1 The application discloses a grinding head driving structure, which comprises a mounting seat 1, a permanent magnet motor 2, a main shaft 3, a grinding tool (not shown in the figure), a main bearing 4 and a cooling system.

[0045] The mounting seat 1 serves as a main carrier, and the mounting seat 1 is provided with a mounting cavity 11. The cooling system comprises a cooling flow channel 12, which is arranged around the mounting cavity 11 to cool the mounting seat 1 by using the cooling flow channel 12. The permanent magnet motor 2 serves as a power source, and a stator 21 of the permanent magnet motor 2 is fixedly connected in the mounting cavity 11 and abuts against the circumferential side wall of the mounting cavity 11. The main shaft 3 is driven by the permanent magnet motor 2 and is used for connecting the grinding tool. Specifically, the main shaft 3 is rotatably mounted in the mounting cavity 11 through the main bearing 4. Specifically, an inner ring of the main bearing 4 is sleeved on the main shaft 3, an outer ring of the main bearing 4 abuts against and is fixed relative to the circumferential side wall of the mounting cavity 11, and the main shaft 3 is connected with a rotor 22 of the permanent magnet motor 2. A first end of the main shaft 3 protrudes from the mounting cavity 11 and is used for connecting the grinding tool. The cooling flow channel 12 can indirectly cool the permanent magnet motor 2 and the main bearing 4 at the same time through the mounting seat 1.

[0046] In the grinding head driving structure, the permanent magnet motor 2 is used to directly drive the main shaft 3 to rotate, the permanent magnet motor 2 and the main bearing 4 are arranged in the mounting cavity 11 of the mounting seat 1, and the cooling flow channel 12 is arranged in the mounting seat 1 to cool the permanent magnet motor 2 and the main bearing 4 at the same time. Through the organic combination of the multiple features, the lightweight improvement and the high-speed improvement of the grinding head driving structure are realized, the problem of the increase of heat generation caused by high speed is solved, the continuous high-speed work is ensured, the speed reduction or shutdown cooling is not needed, the production efficiency is greatly improved, and the overall structure is simple.

[0047] Specifically, the cooling principle is that when the permanent magnet motor 2 works, the rotor 22 drives the main shaft 3 to rotate, the main shaft 3 drives the grinding tool to rotate, and in the working process, the rotor 22 rotates relative to the stator 21, and the inner ring of the main bearing 4 rotates relative to the outer ring of the main bearing 4. Therefore, under the working condition of high speed, the permanent magnet motor 2 and the main bearing 4 will generate a large amount of heat, the heat of the permanent magnet motor 2 can be transmitted to the circumferential side wall of the mounting cavity 11 through the stator 21, and the heat of the main bearing 4 can be transmitted to the circumferential side wall of the mounting cavity 11 through the outer ring of the main bearing 4, that is, the heat of the permanent magnet motor 2 and the main bearing 4 can be transmitted to the mounting seat 1, and then taken away by the cooling liquid in the cooling flow channel 12, so that the cooling flow channel 12 simultaneously cools the permanent magnet motor 2 and the main bearing 4.

[0048] In the embodiment, the structure of the permanent magnet motor 2 can have two schemes:

[0049] One of them is that the stator 21 includes a stator core, and the stator core abuts against the circumferential side wall of the mounting cavity 11. In this scheme, the permanent magnet motor 2 has no shell, and the stator core is directly installed in the mounting cavity 11, reducing the heat conduction transition of the shell, and the cooling effect is best. Of course, in this scheme, the permanent magnet motor 2 and the mounting seat 1 may need to be designed and produced in combination, and many ceramic enterprises do not have the ability to produce the permanent magnet motor 2, so the permanent magnet motor 2 and the mounting seat 1 need to be designed and produced by outsourcing, which will easily lead to the situation that the overall production cost is relatively high;

[0050] The second one is that the stator 21 includes a stator core and a shell, and the shell is sleeved on the stator core, and the shell abuts against the circumferential side wall of the mounting cavity 11. In this scheme, the permanent magnet motor 2 has a shell, and the heat of the permanent magnet motor 2 is transmitted to the circumferential side wall of the mounting cavity 11 through the stator core and the shell in turn, and the cooling effect is relatively poor, but the permanent magnet motor 2 is complete and can be directly purchased on the market, which is conducive to the research and development and production management of enterprises.

[0051] Of course, considering comprehensively, the first scheme of the above permanent magnet motor 2 is preferred.

[0052] In addition, it should be noted that the application points of the application are the installation of the permanent magnet motor 2 in the mounting cavity 11 and the design of the cooling flow channel 12, and the structure of the permanent magnet motor 2 itself is not the application point of the application, so the other structures of the permanent magnet motor 2 are not limited, and the structures of the rotor 22 and the stator 21 and the specific cooperation structure between them are not limited.

[0053] Reference Figure 1In the embodiment, the grinding head driving structure further comprises a feeding assembly 7 and a machine base 8, the mounting base 1 is slidably arranged on the machine base 8, and the feeding assembly 7 is arranged between the machine base 8 and the mounting base 1 to drive the mounting base 1 to slide relative to the machine base 8, so that the feeding amount of the grinding tool can be accurately controlled.

[0054] Specifically, the machine base 8 is provided with a through sliding groove, the mounting base 1 is slidably arranged in the sliding groove, the sliding direction of the mounting base 1 is parallel to the axial direction of the main shaft 3, and it can also be understood that the extension direction of the sliding groove is parallel to the axial direction of the main shaft 3; the feeding assembly 7 is mounted on the machine base 8, and the output end of the feeding assembly 7 is in transmission connection with the mounting base 1.

[0055] It should be noted that the feeding assembly 7 can be a manually driven structure or an automatically driven structure, and can drive the mounting base 1 to slide relative to the machine base 8, and the specific structure of the feeding assembly 7 is not limited in the present application.

[0056] Referring to Figure 1 and Figure 2 , and taking the directions shown in Figure 2 as reference, in the embodiment, the mounting base 1 comprises a sliding sleeve 18, a first end disc 13 and a second end disc 14, the sliding sleeve 18 has the mounting cavity 11 described above, the mounting cavity 11 is in a two-end opening shape, and a first end face 101 and a second end face 102 are respectively formed at the two opening ends of the mounting cavity 11, wherein the first end face 101 is located at the left opening end of the mounting cavity 11, and the second end face 102 is located at the right opening end of the mounting cavity 11; the mounting cavity 11 is sequentially composed of a first stepped hole 111, a second stepped hole 112, a third stepped hole 113 and a fourth stepped hole 114 from right to left, wherein the hole diameter of the first stepped hole 111 is greater than the hole diameter of the second stepped hole 112, the hole diameter of the second stepped hole 112 is greater than the hole diameter of the third stepped hole 113, the hole diameter of the fourth stepped hole 114 is greater than the hole diameter of the third stepped hole 113, the main body part of the stator 21 is mounted on the first stepped hole 111, and a part of the stator 21 can also be mounted on the second stepped hole 112, that is, the outer peripheral surface of the stator 21 can abut against the hole walls of the first stepped hole 111 and the second stepped hole 112, the stator 21 can also abut against the stepped face of the second stepped hole 112 for limiting, and / or the stator 21 can also abut against the right stepped face of the third stepped hole 113 for limiting; the main bearing 4 is composed of two high-speed ball bearings arranged side by side, the main bearing 4 is mounted on the fourth stepped hole 114, the outer ring of the main bearing 4 abuts against the hole wall of the fourth stepped hole 114, and the main bearing 4 can also abut against the left stepped face of the third stepped hole 113 for limiting, of course, the main shaft 3 can also be provided with a shaft shoulder and / or a positioning ring to cooperate with the mounting of the main bearing 4.

[0057] Preferably, the first end disc 13 and the second end disc 14 are respectively arranged at the two ends of the mounting cavity 11, specifically, the first end disc 13 is arranged on the first end face 101 by bolts, and the second end disc 14 is arranged on the second end face 102 by bolts, the rotor 22 is sleeved on the main shaft 3 and is in transmission connection with the main shaft 3, and the first end of the main shaft 3 penetrates through the first end disc 13 and is exposed outward.

[0058] The first end disc 13 can axially position the main bearing 4, specifically, the first end disc 13 can abut against the outer ring of the main bearing 4, thereby clamping and fixing the main bearing 4, so as to axially position the main bearing 4.

[0059] The second end disc 14 can axially position the stator 21 of the permanent magnet motor 2, specifically, in the embodiment, the grinding head driving structure further comprises a positioning spacer 9, the positioning spacer 9 is located in the mounting cavity 11 and is clamped between the stator 21 and the second end disc 14, in this way, the force of the second end disc 14 acts on the positioning spacer 9, and then the positioning spacer 9 acts on the stator 21, thereby axially positioning the stator 21; in other embodiments, the second end disc 14 can also directly abut against the stator 21, which can also axially position the stator 21.

[0060] Of course, considering comprehensively, it is better to position the stator 21 through the positioning spacer 9, so as to effectively simplify the structure of the second end disc 14 while ensuring that the permanent magnet motor 2 has a larger installation depth.

[0061] Of course, preferably, the first end disc 13 and the second end disc 14 can also have a sealing function, that is, the two end discs are blocked at the two ends of the mounting cavity 11 to effectively seal the mounting cavity 11, so as to avoid dust in the working environment from entering the mounting cavity to affect the permanent magnet motor 2 and the main bearing 4. Since the first end of the main shaft 3 penetrates through the first end disc 13 and is exposed outward, it can also be understood that the first end disc 13 needs to be sleeved on the main shaft 3, therefore, preferably, a first sealing ring 131 can be arranged between the first end disc 13 and the main shaft 3, so as to ensure the sealing performance when the main shaft 3 rotates.

[0062] More preferably, the main shaft 3 is also rotatably arranged on the second end disc 14 through the secondary bearing 6, so that the rotation of the main shaft 3 is more stable, the main bearing 4 is located between the first end disc 13 and the permanent magnet motor 2, and the permanent magnet motor 2 is located between the main bearing 4 and the secondary bearing 6. Specifically, the inner side of the second end disc 14 is recessed inward to form an accommodating groove 144, the secondary bearing 6 is arranged on the accommodating groove 144, and the second end of the main shaft 3 is connected with the secondary bearing 6 after penetrating through the rotor 22 of the permanent magnet motor 2, that is, the permanent magnet motor 2 is located at the middle part of the main shaft 3. Preferably, the accommodating groove 144 is in a stepped shape, so as to provide a receiving space for the second end of the main shaft 3.

[0063] It should be noted that the rotor 22 and the main shaft 3 can be connected by means of a crescent key, a flat key, etc. In this embodiment, the transmission method between the rotor 22 and the main shaft 3 is not specifically limited, as long as the rotor 22 can drive the main shaft 3 to rotate together when it rotates relative to the stator 21.

[0064] By combining the above schemes, the permanent magnet motor 2 is located between the main bearing 4 and the secondary bearing 6, and the secondary bearing 6 is directly installed in the second end plate 14. While ensuring that there is sufficient relative distance between the main bearing 4 and the secondary bearing 6 (if the distance is too small, the main shaft 3 is prone to vibration at high speed), the space between the main bearing 4 and the secondary bearing 6 is reasonably utilized to accommodate the permanent magnet motor 2. At the same time, the space is further saved by using the second end plate 14 to install the secondary bearing 6. This can greatly reduce the length of the entire grinding head drive structure and reduce its overall volume, further realizing miniaturization.

[0065] On the other hand, in the above scheme, the assembly of each component is simple and easy to maintain: during assembly, the permanent magnet motor 2 is first installed in the mounting cavity 11, the first end plate 13 is fitted into the main shaft 3, and the main bearing 4 is installed on the main shaft 3. Then, the second end of the main shaft 3 is inserted into the mounting cavity 11 through the first end face 101, so that the main shaft 3 is connected to the rotor 22 and the main bearing 4 is fixed relative to the mounting cavity 11. At this time, the first end plate 13 can also be fastened to the first end face 101 by bolts. Then, the positioning spacer 9 is fitted in, and the secondary bearing 6 is installed on the second end of the main shaft 3. Finally, the receiving groove 144 of the second end plate 14 is aligned with the secondary bearing 6, and the second end plate 14 is fastened to the second end face 102 by bolts, so that the secondary bearing 6 and the receiving groove 144 are tightly fitted, and at the same time, the force of the second end plate 14 is applied to the stator 21 through the positioning spacer 9.

[0066] See Figures 2 to 4 , Figure 6 In this embodiment, preferably, a plurality of through holes 121 are arranged in the circumferential sidewall of the mounting cavity 11, and at least one guide groove 122 is formed by inward recessing on both end faces of the mounting cavity 11. The guide groove 122 and the through holes 121 are connected in series to form a cooling channel 12. Preferably, a sealing plate 15 is also embedded at the opening end of the guide groove 122 to prevent leakage of coolant.

[0067] Preferably, the first end plate 13 or the second end plate 14 abuts against the sealing plate 15 to prevent the sealing plate 15 from falling off.

[0068] Specifically, the sealing plate 15 is preferably made of plastic or rubber so that it can be interference-fitted into the opening end of the guide groove 122, resulting in a better sealing effect.

[0069] In order to avoid the sealing plate 15 blocking the through groove 122, the cross section of the through groove 122 is preferably stepped, so as to support the sealing plate 15 by using the stepped structure thereof.

[0070] As an example, six through holes 121 are provided, which are uniformly arranged along the circumference of the mounting cavity 11, the extension direction of the through holes 121 corresponds to the opening direction of the mounting cavity 11, and the through holes 121 can penetrate the first end face 101 and the second end face 102, thereby forming six through hole interfaces on the first end face 101 and the second end face 102, three through grooves 122 are recessed inwardly on the first end face 101 to conduct the six through hole interfaces two by two, two through grooves 122 are recessed inwardly on the second end face 102 to conduct four of the through hole interfaces two by two, and two through hole interfaces are reserved on the second end face 102 without being conducted by the through grooves 122. In this way, the five through grooves 122 sequentially connect the six through holes 121 to form a single cooling flow channel 12, and the two independent through hole interfaces on the second end face 102 can be respectively conducted with the liquid inlet 141 and the liquid outlet 142 on the second end disc 14. In this way, the cooling liquid enters the cooling flow channel 12 through the liquid inlet 141 on the second end disc 14, and flows out through the liquid outlet 142 on the second end disc 14 after passing through the six through holes 121 and the five through grooves 122. Of course, based on the fact that the through grooves 122 have five, the sealing plate 15 also has five, and each sealing plate 15 is correspondingly embedded in one through groove 122.

[0071] It is known that the liquid inlet 141 and the liquid outlet 142 are connected to an external cooling circulation system.

[0072] It is known that, as the first variable mode of the above example, the number of through grooves 122 on the first end face 101 and the second end face 102 can also be exchanged, that is, two through grooves 122 are provided on the first end face 101, and four through grooves 122 are provided on the second end face 102. At this time, the liquid inlet 141 and the liquid outlet 142 can be provided on the first end disc 13.

[0073] As the second variable mode of the above example, the liquid inlet 141 and the liquid outlet 142 can also be provided on the sliding sleeve 18, so as to be connected to the cooling flow channel 12 to realize the flow of the cooling liquid.

[0074] As the third variable mode of the above example, the through grooves 122 can also be provided on the end discs, that is, at least one through groove 122 is provided on the first end disc 13 and the second end disc 14, and the through grooves 122 and the through holes 121 in the circumferential side wall of the mounting cavity 11 are connected to each other to form the cooling flow channel 12.

[0075] It should be noted that the number of through holes 121 can also be four, five, seven, eight, etc., and the total number of the through grooves 122 can correspond to one less than the number of the through holes 121, so that a single cooling flow channel 12 can be formed after being connected in series; the number of the through holes 121 and the through grooves 122 is not specifically limited in the present application. It can be known that when the number of the through holes 121 is odd, the liquid inlet 141 and the liquid outlet 142 can be located on different end plates; when the number of the through holes 121 is even, the liquid inlet 141 and the liquid outlet 142 can be located on the same end plate.

[0076] In some other embodiments, the cooling flow channel 12 can also be provided with two, and the input ends of the two cooling flow channels 12 are connected by a shunt groove, and the output ends of the two cooling flow channels 12 are connected by a flow groove, and the liquid inlet 141 is connected with the shunt groove, and the liquid outlet 142 is connected with the flow groove, so that a double cooling mode is formed.

[0077] In the above scheme, a plurality of through holes 121 are arranged in the circumferential side wall of the mounting cavity 11, and the cooling flow channel 12 is formed by connecting the through grooves 122 and the through holes 121 in series, which effectively improves the heat exchange efficiency and uniformity, and avoids the situation of local uneven heat dissipation, and is convenient to process.

[0078] Referring to Figure 3 In the present embodiment, a plurality of screw holes 124 can also be provided on the first end face 101, and the screw holes 124 are located between the two adjacent through grooves 122, and the screw holes 124 on the first end face 101 can be used to fix the first end plate 13.

[0079] Referring to Figure 4 In the present embodiment, a plurality of screw holes 124 can also be provided on the second end face 102, and the screw holes 124 are located between the two adjacent through grooves 122, and the screw holes 124 on the second end face 102 can be used to fix the second end plate 14.

[0080] Combined with Figure 5 In the present embodiment, the second end face 102 can also be provided with an oil hole 123, and the second end plate 14 is provided with an oil inlet 143 corresponding to the oil hole 123, and the oil hole 123 can penetrate to the fourth stepped hole 114, so as to inject lubricating oil to lubricate the main bearing 4.

[0081] In the present embodiment, the present application also discloses an edging machine, which comprises the grinding head driving structure as described above. When the grinding head driving structure is applied to the edging machine, the grinding tool in the grinding head driving structure comprises an edging wheel.

[0082] In addition, the application also discloses a polishing machine comprising the grinding head driving structure.

[0083] Specifically, the first end (i.e. the output end) of the main shaft 3 is provided with an adapter block 5, which can be used to connect the grinding wheel or the polishing disc. Preferably, the adapter block 5 is integrally formed with the main shaft 3. Of course, in other preferable embodiments, the adapter block 5 can also be detachably connected with the main shaft 3.

[0084] It should be noted that the first end of the main shaft 3 can also be connected with the grinding tool through other known ways, such as forming a column with a screw hole or a thread at the first end of the main shaft 3, and then inserting and fitting the column with the grinding tool and locking through a bolt or a nut.

[0085] Embodiment 2

[0086] Referring to Figure 7 The embodiment also discloses a grinding head driving structure, and the difference between the embodiment and the embodiment 1 is only that the cooling system applied is different. Specifically, the embodiment 1 applies a liquid cooling mode, while the embodiment applies an air cooling mode.

[0087] In the embodiment, the cooling system comprises a cooling fan 16, which is in driving connection with the main shaft 3. The cooling fan 16 can at least cool the outer surface of the mounting base 1. Thus, when the permanent magnet motor 2 drives the main shaft 3 to rotate, the main shaft 3 drives the cooling fan 16 to work, and the cooling fan 16 blows air on the mounting base 1 to realize air cooling, thereby indirectly cooling the permanent magnet motor 2 and the main bearing 4 at the same time, and no additional driving source is needed to drive the cooling fan 16, thereby saving cost.

[0088] Of course, the cooling fan 16 can also adopt a negative pressure mode to cool the mounting base 1.

[0089] Preferably, the second end of the main shaft 3 protrudes into the installation cavity 11 and is connected with the cooling fan 16. Thus, the main shaft 3 directly drives the cooling fan 16, and the overall structure is simple and the parts are few.

[0090] Specifically, the second end disc 14 is further provided with an axle hole 145 which is communicated with the accommodating groove 144 and the axis of the axle hole 145 is in line with the axis of the accommodating groove 144, the second end of the main shaft 3 passes through the axle hole 145 and is connected with the cooling fan 16, that is, the cooling fan 16 is located on the side of the second end disc 14 which is away from the sliding sleeve 18. Since the second end of the main shaft 3 passes through the second end disc 14 and is exposed outward, it can also be understood that the second end disc 14 needs to be sleeved on the main shaft 3, therefore, preferably, a second sealing ring 146 can be arranged between the second end disc 14 and the main shaft 3 to ensure the sealing performance when the main shaft 3 rotates, and at the same time, to avoid the dust brought by the cooling fan 16 from entering the installation cavity 11 through the axle hole 145.

[0091] It should be noted that in other preferred embodiments, a transmission member can also be used to drive the cooling fan 16 between the main shaft 3 and the cooling fan 16, that is, the main shaft 3 indirectly drives the cooling fan 16 to work through the transmission member.

[0092] Referring to Figure 7 More preferably, the second end disc 14 can be further provided with a wind cover 17 which covers the cooling fan 16 to provide protection.

[0093] In summary, the grinding head driving structure provided by the application directly drives the main shaft 3 to rotate by using the permanent magnet motor 2, and the permanent magnet motor 2 and the main bearing 4 are arranged in the installation cavity 11 of the mounting seat 1, and the cooling system is used to cool the mounting seat 1 to indirectly cool the permanent magnet motor 2 and the main bearing 4, and the cooling can be realized by using liquid cooling and / or air cooling, through the organic combination of multiple characteristics, the lightweight improvement and high speed improvement of the grinding head driving structure are realized, and the problem of heat generation caused by high speed is solved, ensuring that the high speed operation can be continuously realized without the need for speed reduction or shutdown cooling, greatly improving the production efficiency, and the overall structure is simple; the two end discs are used to realize the axial positioning of the main bearing 4 and the stator 21, and the effective sealing of the installation cavity 11 can be further realized, avoiding the dust in the working environment from entering the installation cavity 11 to affect the permanent magnet motor 2 and the main bearing 4, at the same time, the permanent magnet motor 2 is located between the main bearing 4 and the secondary bearing 6, and the secondary bearing 6 is directly installed in the second end disc 14, which can greatly reduce the length of the entire grinding head driving structure and the overall volume, further realizing miniaturization; the multiple through holes 121 are arranged in the circumferential side wall of the installation cavity 11, and the cooling flow channel 12 is formed by the series connection of the through holes 121 and the communicating grooves 122, which effectively improves the heat exchange efficiency and uniformity, avoids the local uneven heat dissipation, and is convenient to process.

[0094] The technical means disclosed in the present application are not limited to the technical means disclosed in the above embodiments, and include technical solutions composed of any combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the scope of protection of the present application.

Claims

1. A structure for driving a grinding head, characterized by comprising: The application relates to a cooling system for a permanent magnet motor and a main shaft. The application comprises: a mounting base (1) provided with a mounting cavity (11); a permanent magnet motor (2), a stator (21) of the permanent magnet motor (2) being fixedly connected in the mounting cavity (11), and the stator (21) abutting against the circumferential side wall of the mounting cavity (11); a main shaft (3) rotatably mounted in the mounting cavity (11) through a main shaft bearing (4), and the main shaft (3) being connected with a rotor (22) of the permanent magnet motor (2), a first end of the main shaft (3) protruding out of the mounting cavity (11) and being used for connecting a grinding tool; a cooling system configured to cool the mounting base (1) to indirectly cool the permanent magnet motor (2) and the main shaft bearing (4) at the same time; the cooling system comprises a cooling flow channel (12) surrounding the mounting cavity (11); the mounting base (1) comprises a sliding sleeve (18), a first end disc (13) and a second end disc (14), the sliding sleeve (18) is provided with the mounting cavity (11), the mounting cavity (11) is in a two-end opening shape, and the first end disc (13) and the second end disc (14) are respectively connected to the two ends of the mounting cavity (11); the main shaft bearing (4) is located between the first end disc (13) and the permanent magnet motor (2); 2. The abrasive head drive structure of claim 1, wherein, a plurality of through holes (121) are arranged in the circumferential side wall of the mounting cavity (11), at least one lead-through groove (122) is recessed inwardly on the end face of the mounting cavity (11), or at least one lead-through groove (122) is arranged on the first end disc (13) and the second end disc (14), and the lead-through groove (122) and the through hole (121) are connected in series to form the cooling flow channel (12).

3. The abrasive head drive structure of claim 2, wherein, the cooling system comprises a cooling fan (16) in transmission connection with the main shaft (3), and the cooling fan (16) can at least cool the outer surface of the mounting base (1).

4. The abrasive head drive structure of any one of claims 1 to 3, wherein, a second end of the main shaft (3) protrudes out of the mounting cavity (11) and is connected with the cooling fan (16).

5. The abrasive head drive structure of claim 1, wherein, the rotor (22) is sleeved on the main shaft (3) and is in transmission connection with the main shaft (3), and a first end of the main shaft (3) penetrates through the first end disc (13) and is exposed outwardly.

6. The abrasive head drive structure of claim 1, wherein, the main shaft (3) is also rotatably mounted on the second end disc (14) through a secondary shaft bearing (6), and the permanent magnet motor (2) is located between the main shaft bearing (4) and the secondary shaft bearing (6).

7. The abrasive head drive structure of claim 1, wherein, a positioning spacer sleeve (9) is further arranged in the mounting cavity (11) and is clamped between the stator (21) and the second end disc (14).

8. The abrasive head drive structure of claim 7, wherein, if the lead-through groove (122) is recessed inwardly on the end face of the mounting cavity (11), a sealing plate (15) is further embedded on the opening end of the lead-through groove (122). the first end disc (13) or the second end disc (14) abuts against the sealing plate (15).

9. The abrasive head drive structure of claim 1 or 7 or 8, wherein, The cooling flow channel (12) is further connected with an inlet (141) and an outlet (142), the inlet (141) is arranged on the first end disc (13) or the second end disc (14), and the outlet (142) is arranged on the first end disc (13) or the second end disc (14).

10. The abrasive head drive structure of any one of claims 1 to 3, wherein, The stator (21) comprises a stator core, and the stator core is in abutment with the circumferential side wall of the mounting cavity (11); or the stator (21) comprises a stator core and a shell, the shell is sleeved on the stator core, and the shell is in abutment with the circumferential side wall of the mounting cavity (11).

11. The abrasive head drive structure of any one of claims 1 to 3, wherein, Further comprising a feeding assembly (7) and a machine base (8), the mounting seat (1) is slidingly arranged on the machine base (8), and the feeding assembly (7) is arranged between the machine base (8) and the mounting seat (1) and is used for driving the mounting seat (1) to slide relative to the machine base (8).

12. An edger as claimed in claim 11, characterized in that The grinding head driving structure comprises the grinding head driving structure according to any one of claims 1 to 11.

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