CN111331485A

CN111331485A - Grinding device

Info

Publication number: CN111331485A
Application number: CN202010296463.2A
Authority: CN
Inventors: 唐文林; 刘连东; 姚敏; 胡晨毅
Original assignee: Jiaxing Woerde Diamond Tool Co ltd
Current assignee: Jiaxing Woerde Diamond Tool Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-06-26

Abstract

The invention provides a grinding device which comprises a plurality of grinding units, a revolution transmission member and a rotation transmission member, wherein the revolution transmission member is in driving connection with the grinding units, the grinding units are arranged on the revolution transmission member at intervals along the circumferential direction, the grinding units revolve around the center of the revolution transmission member, the rotation transmission member is in driving connection with the grinding units, the rotation transmission member drives the grinding units to rotate, and the sum of the diameters of the grinding units is larger than the diameter of the revolution transmission member. Through the technical scheme provided by the application, the problem that the use cost is high in the prior art can be solved.

Description

Grinding device

Technical Field

The invention relates to the technical field of processing devices, in particular to a grinding device.

Background

At present, the grinding wheel is a grinding tool with diamond particles on the surface and certain grinding capacity, and can be used for edging and chamfering the cutting section of glass and also can be used for grinding arc-shaped tracks which are difficult to finish by a cutting knife wheel. The size of the grinding product and the size of the grinding amount directly determine the parameters of the appearance, the size and the like of the grinding wheel.

In the prior art, for large-size and large-grinding-amount glass, such as a television display screen, vehicle-mounted glass and the like, grinding wheels produced by sintering, brazing and other processes with large overall dimensions and long service life are often required. Wherein, this kind of grinding miller production degree of difficulty is great, manufacturing cost is higher, often is impaired because of grinding miller local solder in the use, if appear: the problems of local breakout, holes, cracks and the like cause the whole grinding wheel to be scrapped, and the high-degree waste phenomenon is caused for production and use. Therefore, the prior art has the problem of high use cost.

Disclosure of Invention

The invention provides a grinding device, which aims to solve the problem of high use cost in the prior art.

The invention provides a grinding device which comprises a plurality of grinding units, a revolution transmission member and a rotation transmission member, wherein the revolution transmission member is in driving connection with the grinding units, the grinding units are arranged on the revolution transmission member at intervals along the circumferential direction, the grinding units revolve around the center of the revolution transmission member as the circle center, the rotation transmission member is in driving connection with the grinding units, the rotation transmission member drives the grinding units to rotate, and the sum of the diameters of the grinding units is larger than the diameter of the revolution transmission member.

Further, the grinding unit comprises a main body and a grinding head, the grinding head is arranged at one end of the main body, the main body is arranged in the revolution transmission member in a penetrating mode, a first tooth-shaped structure is arranged on the outer wall of the main body, and the first tooth-shaped structure is meshed with the rotation transmission member.

Furthermore, the revolution driving member is a transmission ring, a second tooth-shaped structure is arranged on the inner wall of the transmission ring, the main body is arranged in the transmission ring in a penetrating mode, and the first tooth-shaped structure is meshed with the second tooth-shaped structure.

Furthermore, the rotation transmission part is a first transmission gear, the first transmission gear and the transmission ring are coaxially arranged, the grinding units are arranged on the outer side of the first transmission gear in a surrounding mode, one side of the main body is meshed with the second tooth-shaped structure, and the other side of the main body is meshed with the first transmission gear.

Furthermore, the revolution driving member is a second transmission gear, a plurality of first mounting holes are formed in the second transmission gear at intervals, and the plurality of grinding units penetrate through the plurality of first mounting holes one by one.

Furthermore, the grinding unit also comprises a third transmission gear, the third transmission gear is arranged at the other end of the main body, the grinding head and the third transmission gear are respectively positioned at two sides of the second transmission gear, and the outer wall of the third transmission gear forms a first tooth-shaped structure.

Furthermore, the rotation transmission part comprises a first transmission gear, the first transmission gear and a third transmission gear are located on the same side of the second transmission gear, the grinding units are arranged on the outer side of the first transmission gear in a surrounding mode, and the third transmission gear is meshed with the first transmission gear.

Furthermore, the rotation transmission part further comprises a transmission shaft and a first bearing, the first transmission gear is sleeved on the transmission shaft, a second mounting hole is formed in the second transmission gear, one end of the transmission shaft penetrates through the second mounting hole, and the first bearing is arranged between the transmission shaft and the second mounting hole.

Furthermore, the grinding device also comprises a driving shaft and a fourth transmission gear, the fourth transmission gear is sleeved on the driving shaft, and the fourth transmission gear is meshed with the second transmission gear so as to drive the second transmission gear to rotate.

Further, the grinding device also comprises a shell, and the plurality of grinding units, the revolution transmission piece and the rotation transmission piece are all arranged in the shell.

Further, the casing includes the cover body and drain pan, and the cover body has and holds the chamber, and a plurality of grinding units, revolution driving medium and rotation driving medium all set up and are holding the intracavity, and the drain pan setting is provided with on the drain pan and dodges the portion at the open end of the cover body, dodges a plurality of grinding unit settings of portion correspondence on the drain pan.

By applying the technical scheme of the invention, the grinding device comprises a plurality of grinding units, a revolution transmission member and a rotation transmission member. The revolution transmission member is in driving connection with the grinding units, so that the grinding units are arranged on the revolution transmission member at intervals along the circumferential direction, the grinding units can revolve around the center of the revolution transmission member as the circle center, the rotation transmission member is in driving connection with the grinding units, the rotation transmission member is used for driving the grinding units to rotate, and the grinding units can be used for grinding the product to be ground in a mode of combining the revolution and the rotation. When part of the grinding units are damaged, only the damaged grinding units can be replaced, so that the use cost can be reduced. And, through setting up the diameter sum of a plurality of grinding units into being greater than the diameter of revolution driving medium, can increase the total area of contact of grinding device and the product of treating the grinding in-process to can promote grinding device's wearability and grinding efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a grinding apparatus according to an embodiment of the present invention;

FIG. 2 illustrates a top view of a grinding apparatus provided in accordance with an embodiment of the present invention;

FIG. 3 illustrates a bottom view of a grinding apparatus provided in accordance with an embodiment of the present invention;

fig. 4 shows an exploded view of a grinding apparatus provided according to a second embodiment of the present invention;

FIG. 5 is a schematic structural view of a grinding apparatus according to a second embodiment of the present invention;

FIG. 6 is a schematic view showing still another structure of a grinding apparatus according to a second embodiment of the present invention;

fig. 7 shows a schematic structural view of the housing in fig. 4.

Wherein the figures include the following reference numerals:

10. a grinding unit; 11. a main body; 111. a first tooth form structure; 12. grinding the head; 13. a third transmission gear; 20. a revolution driving member; 21. a drive ring; 211. a second tooth-shaped structure; 22. a second transmission gear; 221. a first mounting hole; 222. a second mounting hole; 30. a self-rotating transmission member; 31. a first drive gear; 32. a drive shaft; 40. a drive shaft; 50. a fourth transmission gear; 60. a housing; 61. a cover body; 611. an accommodating chamber; 62. a bottom case; 621. an avoidance part; 70. a second bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 3, an embodiment of the present invention provides a grinding apparatus including a plurality of grinding units 10, a revolving transmission member 20, and a rotating transmission member 30. The revolution transmission member 20 is in driving connection with the grinding units 10, the grinding units 10 are circumferentially arranged on the revolution transmission member 20 at intervals, the grinding units 10 revolve around the center of the revolution transmission member 20, the rotation transmission member 30 is in driving connection with the grinding units 10, and the rotation transmission member 30 drives the grinding units 10 to rotate. With the above structure, the grinding unit 10 is driven to revolve by the revolution transmission member 20, and the grinding unit is driven to rotate by the rotation transmission member 30, so that the grinding unit 10 grinds the product to be ground in a manner of combining revolution and rotation. Specifically, the revolution driving member 20 and the rotation driving member 30 may be drivingly connected to the grinding unit 10 by means of gears, belts, or the like. In the embodiment, since the product to be ground needs to be ground by using the side walls of the grinding units 10, the total contact area between the grinding device and the product to be ground in the grinding process can be increased by making the sum of the diameters of the plurality of grinding units 10 larger than the diameter of the revolving transmission member 20, and the wear resistance of the grinding device is improved.

With the grinding device provided in the present embodiment, the plurality of grinding units 10 are circumferentially arranged on the revolution transmission member 20 at intervals, the revolution transmission member 20 is used to drive the plurality of grinding units 10 to revolve around the center of the revolution transmission member 20, and the rotation transmission member 30 is used to drive the grinding units 10 to rotate, so that the plurality of grinding units 10 can be used to grind the product to be ground in a combined manner of revolution and rotation. When part grinding unit 10 takes place to damage, can only replace the grinding unit 10 that damages, so can reduce use cost, promote the utilization ratio of spare part. And, set up the diameter sum of a plurality of grinding units 10 to be greater than the diameter of revolution driving medium 20, compare the great grinding device of integrated into one piece's size, can increase the total area of contact of grinding device and the product of waiting to grind in the grinding process to can promote grinding device's wearability and grinding efficiency.

In this embodiment, the grinding unit 10 includes a main body 11 and a grinding head 12, the grinding head 12 is disposed at one end of the main body 11, the main body 11 is disposed in the revolving transmission member 20, the outer wall of the main body 11 has a first tooth-shaped structure 111, and the first tooth-shaped structure 111 is engaged with the rotation transmission member 30, so as to realize the driving connection between the rotation transmission member 30 and the grinding unit 10. Specifically, the sum of the diameters of the plurality of grinding heads 12 is larger than the diameter of the revolving transmission member 20, and the side wall of the grinding head 12 is used for grinding a product to be ground. In the present embodiment, the sum of the diameters of the plurality of grinding heads 12 is twice the diameter of the revolving transmission 20. Wherein diamonds are arranged on the outer wall of the grinding head 12.

The first tooth-shaped structure 111 on the outer wall of the main body 11 includes two structures, the first structure is the first tooth-shaped structure 111 directly processed on the outer wall of the main body 11, the second structure is the gear sleeved on the main body 11, and the first tooth-shaped structure 111 is formed by the teeth on the gear. In the present embodiment, the outer wall of the main body 11 is machined with a first tooth-shaped structure 111.

As shown in fig. 1, the revolving transmission member 20 is a transmission ring 21, and a second tooth-shaped structure 211 is disposed on an inner wall of the transmission ring 21. The main body 11 is inserted into the transmission ring 21, so that the first tooth-shaped structure 111 is engaged with the second tooth-shaped structure 211, and the revolving transmission member 20 can be in driving connection with the grinding unit 10.

In the present embodiment, the rotation transmission member 30 is a first transmission gear 31, and the first transmission gear 31 is disposed coaxially with the transmission ring 21. Specifically, the diameter of the first transmission gear 31 is smaller than that of the transmission ring 21, the plurality of grinding units 10 are enclosed outside the first transmission gear 31, one side of the main body 11 is engaged with the second tooth-shaped structure 211, and the other side of the main body 11 is engaged with the first transmission gear 31. With the above structure, when the first transmission gear 31 rotates relative to the transmission ring 21, the grinding unit 10 can simultaneously revolve and rotate under the driving of the first transmission gear 31 and the transmission ring 21.

In this embodiment, the grinding device further comprises a drive assembly in driving connection with the first transmission gear 31 and/or the transmission ring 21. The driving assembly is in driving connection with the first transmission gear 31, when the driving assembly drives the first transmission gear 31 to rotate, the first transmission gear can drive the grinding unit 10 to rotate, and the grinding unit 10 can revolve around the center of the transmission ring 21 as the center of the circle due to the fact that the grinding unit 10 is meshed with the transmission ring 21. The driving assembly is in driving connection with the transmission ring 21, when the driving assembly drives the transmission ring 21 to rotate, the transmission ring 21 can drive the grinding unit 10 to revolve, and the grinding unit 10 rotates due to the fact that the grinding unit 10 is meshed with the first transmission gear 31. The driving assembly is in driving connection with the first transmission gear 31 and the transmission ring 21, the rotating speed and the rotating mode of the first transmission gear 31 and the transmission ring 21 are controlled, the revolution and rotation states and the rotating speed of the grinding unit 10 can be adjusted, and therefore the grinding device can meet various grinding requirements.

As shown in fig. 4 to 7, a second embodiment of the present invention provides a grinding device, which is different from the first embodiment in that in the second embodiment, the revolving transmission member 20 is a second transmission gear 22, a plurality of first mounting holes 221 are formed in the second transmission gear 22 at intervals, and a plurality of grinding units 10 are respectively arranged in the plurality of first mounting holes 221 in a penetrating manner. With the above structure, when the second transmission gear 22 rotates, the grinding unit 10 is driven to revolve by the second transmission gear 22 as the grinding unit 10 is inserted into the first mounting hole 221.

In this embodiment, the grinding unit 10 further includes a third transmission gear 13, the third transmission gear 13 is disposed at the other end of the main body 11, the grinding head 12 and the third transmission gear 13 are respectively located at both sides of the second transmission gear 22, and an outer wall of the third transmission gear 13 forms a first tooth-shaped structure 111. Through the third transmission gear 13 sleeved on the grinding unit 10, the grinding unit 10 is convenient to process and assemble, and the processing and assembling cost can be reduced.

As shown in fig. 4, the rotation transmission member 30 includes a first transmission gear 31, and the first transmission gear 31 and the third transmission gear 13 are located on the same side of the second transmission gear 22, so that the first transmission gear 31 and the third transmission gear 13 are engaged with each other. Specifically, a plurality of grinding units 10 are enclosed outside the first transmission gear 31, and the third transmission gear 13 is meshed with the first transmission gear 31, so that the rotation transmission member 30 is in driving connection with the grinding units 10.

Specifically, the rotation transmission member 30 further includes a transmission shaft 32 and a first bearing, and the first transmission gear 31 is sleeved on the transmission shaft 32. The second transmission gear 22 is provided with a second mounting hole 222, one end of the transmission shaft 32 penetrates through the second mounting hole 222, and the first bearing is arranged between the transmission shaft 32 and the second mounting hole 222, so that the friction force of the transmission shaft 32 in the second mounting hole 222 can be reduced by using the first bearing, and the transmission shaft 32 can conveniently rotate relative to the second transmission gear 22.

As shown in fig. 4, the grinding device further includes a driving shaft 40 and a fourth transmission gear 50, the fourth transmission gear 50 is sleeved on the driving shaft 40, and the fourth transmission gear 50 is engaged with the second transmission gear 22 to drive the second transmission gear 22 to rotate, so as to realize the revolution of the grinding unit 10. Further, since the grinding unit 10 is engaged with the first transmission gear 31, the grinding unit 10 rotates while revolving.

In order to reduce the frictional force of the grinding unit 10 in the first mounting hole 221, a second bearing 70 is provided between the main body 11 and the first mounting hole 221, and the frictional force of the grinding unit 10 in the first mounting hole 221 is reduced by the second bearing 70, thereby facilitating the rotation of the grinding unit 10.

In order to improve the protection performance of the device, the grinding device further includes a housing 60, and the plurality of grinding units 10, the revolution driving member 20, and the rotation driving member 30 are disposed in the housing 60.

As shown in fig. 4 and 7, the housing 60 includes a housing 61 and a bottom case 62, the housing 61 has an accommodating chamber 611, the plurality of grinding units 10, the revolution transmission member 20, and the rotation transmission member 30 are disposed in the accommodating chamber 611, and the bottom case 62 is disposed at an opening end of the housing 61. By providing the housing 60 as the cover body 61 and the bottom case 62 which are separate bodies, it is convenient to assemble the plurality of grinding units 10, the revolution driving member 20, and the rotation driving member 30, and the assembly efficiency is improved. In this embodiment, the bottom case 62 is provided with a relief 621, the relief 621 is disposed corresponding to the plurality of grinding units 10, and the grinding head 12 of the grinding unit 10 can extend out of the housing 60 through the relief 621, so as to grind a product to be ground by using the grinding head 12. Wherein, be provided with on the cover body 61 and dodge the hole, one of them dodges the hole and corresponds the transmission shaft 32 and set up, and another dodges the hole and corresponds the drive shaft 40 and sets up, and transmission shaft 32 and drive shaft 40 can pass out and dodge the hole and be connected with the drive division.

In this embodiment, the grinding apparatus further includes a support bracket for supporting the housing 60.

In the present exemplary embodiment, the grinding device comprises the following three operating modes:

first, the driving shaft 40 and the fourth transmission gear 50 drive the second transmission gear 22 to perform circumferential circular motion, so as to drive the third transmission gear 13 to perform circumferential displacement around the first transmission gear 31. Simultaneously, the third transmission gear 13 rotates along with the meshing of the teeth, so that the grinding head 12 rotates and revolves around the second transmission gear 22;

secondly, when the driving shaft 40 and the fourth transmission gear 50 are stationary, the transmission shaft 32 and the first transmission gear 31 are rotated, and the first transmission gear 31 drives the third transmission gear 13 to rotate, so that the grinding head 12 rotates;

thirdly, the fourth transmission gear 50 and the first transmission gear 31 rotate simultaneously, so that the third transmission gear 13 receives the force transmitted by the fourth transmission gear 50 and the first transmission gear 31 simultaneously, and the grinding head 12 can control the rotation speed and the revolution speed according to the rotation speeds of the two driving wheels.

In this embodiment, the grinding device comprises a grinding wheel set.

With the device provided by the embodiment, a grinding wheel set formed by combining revolution and rotation of a plurality of grinding units 10 is used to replace a grinding wheel with a large outer diameter for grinding operation, and when one (some) grinding unit(s) 10 in the grinding wheel set is damaged, the grinding unit(s) 10 can be partially replaced. By adopting the structure, on one hand, the production difficulty of the product can be reduced, the production and use cost of the product can be reduced, and the utilization rate of the diamond can be improved; on the other hand can increase the grinding wheel bed of material and treat the total area of contact of grinding product among the grinding process, promotes the wearability of grinding wheel, reduces the area of contact of grinding wheel bed of material and treating grinding product of a certain moment simultaneously, is favorable to the chip removal and the heat dissipation of grinding wheel, has indirectly promoted the grinding sharpness and the grinding quality of grinding wheel.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The grinding device is characterized by comprising a plurality of grinding units (10), a revolution transmission member (20) and a rotation transmission member (30), wherein the revolution transmission member (20) is in driving connection with the grinding units (10), the grinding units (10) are arranged on the revolution transmission member (20) at intervals along the circumferential direction, the grinding units (10) revolve around the center of the revolution transmission member (20), the rotation transmission member (30) is in driving connection with the grinding units (10), the rotation transmission member (30) drives the grinding units (10) to rotate, and the sum of the diameters of the grinding units (10) is larger than the diameter of the revolution transmission member (20).

2. The grinding device according to claim 1, characterized in that the grinding unit (10) comprises a main body (11) and a grinding head (12), the grinding head (12) is arranged at one end of the main body (11), the main body (11) is arranged in the revolution transmission member (20) in a penetrating way, a first tooth-shaped structure (111) is arranged on the outer wall of the main body (11), and the first tooth-shaped structure (111) is meshed with the rotation transmission member (30).

3. The grinding device according to claim 2, characterized in that the revolution transmission member (20) is a transmission ring (21), a second tooth-shaped structure (211) is arranged on the inner wall of the transmission ring (21), the main body (11) is arranged in the transmission ring (21) in a penetrating way, and the first tooth-shaped structure (111) is meshed with the second tooth-shaped structure (211).

4. A grinding device according to claim 3, wherein the rotation transmission member (30) is a first transmission gear (31), the first transmission gear (31) is coaxially arranged with the transmission ring (21), the plurality of grinding units (10) are enclosed outside the first transmission gear (31), one side of the main body (11) is engaged with the second tooth-shaped structure (211), and the other side of the main body (11) is engaged with the first transmission gear (31).

5. The grinding device according to claim 2, characterized in that the revolving transmission member (20) is a second transmission gear (22), a plurality of first mounting holes (221) are arranged on the second transmission gear (22) at intervals, and a plurality of grinding units (10) are arranged in the first mounting holes (221) in a penetrating manner one by one.

6. A grinding device according to claim 5, characterized in that the grinding unit (10) further comprises a third transmission gear (13), the third transmission gear (13) being provided at the other end of the main body (11), the grinding head (12) and the third transmission gear (13) being located on both sides of the second transmission gear (22), respectively, the outer wall of the third transmission gear (13) forming the first tooth-shaped structure (111).

7. A grinding device according to claim 6, wherein the rotation transmission member (30) comprises a first transmission gear (31), the first transmission gear (31) and the third transmission gear (13) are positioned at the same side of the second transmission gear (22), the grinding units (10) are enclosed outside the first transmission gear (31), and the third transmission gear (13) is meshed with the first transmission gear (31).

8. The grinding device according to claim 7, wherein the rotation transmission member (30) further comprises a transmission shaft (32) and a first bearing, the first transmission gear (31) is sleeved on the transmission shaft (32), the second transmission gear (22) is provided with a second mounting hole (222), one end of the transmission shaft (32) is arranged in the second mounting hole (222) in a penetrating manner, and the first bearing is arranged between the transmission shaft (32) and the second mounting hole (222).

9. The grinding device according to claim 8, further comprising a driving shaft (40) and a fourth transmission gear (50), wherein the fourth transmission gear (50) is sleeved on the driving shaft (40), and the fourth transmission gear (50) is meshed with the second transmission gear (22) to drive the second transmission gear (22) to rotate.

10. The grinding device according to claim 1, characterized in that the grinding device further comprises a housing (60), and a plurality of the grinding units (10), the revolution transmission member (20), and the rotation transmission member (30) are provided in the housing (60).

11. The grinding device according to claim 10, wherein the housing (60) comprises a cover body (61) and a bottom case (62), the cover body (61) has an accommodating cavity (611), the plurality of grinding units (10), the revolving transmission member (20) and the rotating transmission member (30) are all arranged in the accommodating cavity (611), the bottom case (62) is arranged at an opening end of the cover body (61), and an avoiding portion (621) is arranged on the bottom case (62), and the avoiding portion (621) is arranged corresponding to the plurality of grinding units (10).