CN116690328A

CN116690328A - Grinding disc and floor grinding machine

Info

Publication number: CN116690328A
Application number: CN202210593229.5A
Authority: CN
Inventors: 孙杰; 张坤; 胡佳祥; 杨若澜; 王飞; 胡志刚; 邵先需
Original assignee: Guangdong Bozhilin Robot Co Ltd
Current assignee: Guangdong Bozhilin Robot Co Ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2023-09-05

Abstract

The invention discloses a grinding disc and a floor grinder, wherein the grinding disc comprises a box body, a driving shaft and a planetary gear set, and the box body comprises a first mounting plate; the driving shaft is rotationally connected with the first mounting plate; the planet wheelset is located in the box, and the planet wheelset includes: the planetary grinding device comprises a driving gear, at least two driven gears and at least two planetary grinding disks; the driven shaft is rotationally connected with the first mounting plate by adopting a radial thrust bearing, a boss is arranged on a shaft hole matched with the driven shaft by the first mounting plate, the radial thrust bearing is arranged below the boss, and an inner ring of the radial thrust bearing is arranged below the outer ring; the floor grinding machine comprises a frame, a motor, a travelling mechanism and a grinding disc, wherein a driving shaft is connected with the motor in a transmission manner, and the travelling mechanism is used for assisting the floor grinding machine to advance. Through above-mentioned scheme, the driven shaft can bear bigger axial force effect under radial thrust bearing's effect, and the bearing capacity of abrasive disc is stronger.

Description

Grinding disc and floor grinding machine

Technical Field

The invention relates to the technical field of floor grinding devices, in particular to a grinding disc and a floor grinding machine.

Background

The grinding disc is arranged at the bottom of the floor grinding machine, is mainly used for ground grinding treatment, polishes terrazzo, a concrete surface layer, an epoxy mortar layer, an old epoxy ground and the like, specifically, when the floor grinding machine is used for construction operation, a grinding head on the grinding disc is attached to the floor surface, a transmission wheel set of a motor driving grinding disc is started and drives the grinding head to rotate so as to grind the floor, each wheel shaft of the transmission wheel set is connected with a box body through a shaft sleeve, and a threaded hole is formed in the shaft sleeve and the box body and is fixed through bolts.

However, the gear box for installing the transmission wheel set in the floor grinder needs to bear a large weight of the machine body, the threaded hole receives a large axial tensile force, and when the gear box faces the raised hard foreign matters on the floor, the threaded hole is likely to be stressed too much to deform or fracture the bolt.

Disclosure of Invention

The invention mainly aims to provide a grinding disc and a floor grinding machine, and aims to improve the bearing capacity of the grinding disc in the floor grinding machine.

To achieve the above object, the present invention provides an abrasive disk comprising:

the box body comprises a first mounting plate;

the driving shaft is rotationally connected with the first mounting plate;

the planetary gear set is arranged in the box body, and the planetary gear set comprises:

a drive gear fixed to the drive shaft; and

at least two driven gears, each driven gear is fixed with a driven shaft, each driven gear is in transmission connection with the driving gear, and one end of each driven shaft can respectively pass through the first mounting plate in a rotating way; and

the planetary grinding discs are arranged in one-to-one correspondence with the driven shafts and are fixed at one end of the driven shafts penetrating through the first mounting plate;

the driven shaft is rotationally connected with the first mounting plate by adopting a radial thrust bearing, a boss is arranged on the shaft hole matched with the driven shaft, the radial thrust bearing is arranged below the boss, and an inner ring of the radial thrust bearing is positioned below the outer ring.

In some embodiments of the present invention, the grinding disc further comprises a sun gear rotatably connected to the drive shaft and at least two follower gears coaxially fixed in engagement with the sun gear with the driven shaft.

In some embodiments of the present invention, the housing further includes a second mounting plate, the follower gear is disposed above the follower gear at intervals, the second mounting plate is mounted between the follower gear and is rotationally connected to the driven shaft, and the second mounting plate is further rotationally connected to the driving shaft.

In some embodiments of the present invention, the driven gears comprise two long-axis driven gears and two short-axis driven gears, and the planetary gear set further comprises two first transition wheels and two second transition wheels;

the two first transition wheels are meshed with the driving gear and are arranged on two opposite sides of the driving gear, the two second transition wheels are correspondingly meshed with the two first transition wheels, the two short shaft driven gears are correspondingly meshed with the first transition wheels, the two long shaft driven gears are meshed with the second transition wheels, and the driven shafts of the long shaft driven gears penetrate through the second mounting plate and are fixed with the follow-up gears.

In some embodiments of the present invention, the wheel shafts of the first transition wheel and the second transition wheel are respectively provided with a step shaft, the step shaft passes through the second mounting plate, the step surface abuts against the second mounting plate, and a shaft check ring is arranged at one end of the step shaft passing through the second mounting plate and abuts against the second mounting plate.

In some embodiments of the present invention, the first mounting plate is provided with a flat bottom hole corresponding to the axial position of each transition wheel, the bottom wall of the flat bottom hole is provided with a threaded blind hole, one end of the wheel shaft of the transition wheel is provided with a flange, and the flange is provided with a threaded through hole and is connected with the threaded blind hole through a threaded connecting piece.

In some embodiments of the invention, the grinding disc further comprises a top cover mounted to the second mounting plate and covering the sun gear with the follower gear;

the top cap is provided with the oil filler point, the second mounting panel is provided with the oil leak hole, first mounting panel is provided with the oil drain hole, oil filler point, oil leak hole and oil drain hole all demountable installation have the sealing plug.

In some embodiments of the present invention, the driving shaft is rotationally connected with the first mounting plate by adopting a radial thrust bearing, and an inner ring of the radial thrust bearing is positioned above an outer ring;

the driving shaft bearing is connected with a driving shaft sleeve, each driven shaft is connected with a driven shaft sleeve in a bearing manner, the driving shaft sleeve is fixed in the sun gear, and one end of each driven shaft sleeve is fixed on the first mounting plate.

In some embodiments of the present invention, the grinding disc further includes a first oil seal installed between the drive shaft and the drive shaft bushing, a second oil seal installed between the top cover and the drive shaft bushing, and a third oil seal installed between the driven shaft and the driven shaft bushing.

In some embodiments of the present invention, each of the planetary grinding discs includes a planetary disc and a plurality of grinding heads, a plurality of magnets are disposed on a surface of the planetary disc facing away from the first mounting plate, the magnets are equally spaced around a rotation center of each of the planetary discs, and each of the grinding heads is magnetically attracted to each of the magnets.

In some embodiments of the present invention, each of the planetary polishing plates includes a planetary plate, a connection plate is mounted on a surface of each of the planetary plates facing the case, each connection plate is provided with an assembly hole and is correspondingly assembled with each driven shaft, and an elastic member is mounted on a surface of each connection plate facing the planetary plate to elastically abut against each of the planetary plates.

The utility model provides a terrace grinds machine, includes frame, motor, running gear and abrasive disc, the abrasive disc includes:

the box body comprises a first mounting plate;

the driving shaft is rotationally connected with the first mounting plate;

a drive gear fixed to the drive shaft; and

the driven shaft is rotationally connected with the first mounting plate by adopting a radial thrust bearing, a boss is arranged on a shaft hole matched with the driven shaft of the first mounting plate, the radial thrust bearing is arranged below the boss, and an inner ring of the radial thrust bearing is arranged below the outer ring; the driving shaft is in transmission connection with the motor.

According to the invention, through the scheme, the driving shaft and the driving gear are driven by the motor to rotate relative to the frame, the driven gear, the driven shaft, the follow-up gear and the grinding disc are driven by the driving gear to rotate and revolve around the sun gear, the grinding effect of the planetary grinding disc on the terrace is better, in addition, when the grinding disc abuts against the ground, the radial thrust bearing can provide supporting force for the box body and parts mounted on the box body, the driven shaft can bear larger axial force under the action of the radial thrust bearing, and the bearing capacity of the grinding disc is stronger.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a floor grinding machine according to the present invention;

FIG. 2 is a side view of the floor grinding machine of FIG. 1;

FIG. 3 is a schematic view of an embodiment of a polishing disc of the floor polishing machine according to the present invention;

FIG. 4 is a schematic view of the polishing disc of FIG. 3 with the top cover removed;

FIG. 5 is a schematic top view of the abrasive disk of FIG. 4;

FIG. 6 is a schematic view of the bottom structure of the polishing disc of FIG. 4;

FIG. 7 is a schematic diagram of an embodiment of a case and a planetary gear set;

FIG. 8 is a schematic diagram of the case and planetary gear set of FIG. 7 in a top view;

FIG. 9 is a schematic view of the abrasive disk of FIG. 3 in full section along the axes of two long driven shafts;

FIG. 10 is an enlarged view of the long driven shaft of FIG. 9;

FIG. 11 is an enlarged view of the driven shaft sleeve of FIG. 10;

FIG. 12 is a schematic view of the abrasive disk of FIG. 3 in full section along the two first transition wheel axes;

fig. 13 is an enlarged view of the first transition pulley axle of fig. 11.

Reference numerals illustrate:

100. floor grinding machine; 110. a frame; 120. a motor; 130. a grinding disc; 131. a case; 132. a first mounting plate; 1321. oil leakage holes; 133. a second mounting plate; 1331. a flat bottom hole; 1332. a threaded blind hole; 1333. an oil discharging hole; 134. a drive shaft; 135. a sun gear; 136. a drive shaft sleeve; 140. a planetary gear set; 141. a drive gear; 142. a driven gear; 1421. a long shaft driven gear; 1422. a stub shaft driven gear; 1423. a long driven shaft; 1424. a short driven shaft; 143. a follower gear; 144. a planetary grinding disc; 1441. a planetary disc; 1442. grinding head; 1443. a magnet; 1444. a connecting disc; 1445. a fitting hole; 145. an elastic member; 1451. a rubber plate; 1452. a spring; 1453. a relief hole; 145. radial thrust bearing; 146. a first transition wheel; 147. a second transition wheel; 148. a step shaft; 149. a driven shaft sleeve; 150. a top cover; 151. an oil filling hole; 160. a first oil seal; 161. a second oil seal; 162. and a third oil seal.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present invention.

Referring to fig. 1, the present invention provides a polishing disc, which is applied to a floor polishing machine 100, wherein the floor polishing machine 100 is mainly used for polishing floors, and can effectively polish terrazzo, concrete surface layers, epoxy mortar layers, old epoxy floors and the like.

Referring to fig. 3 to 13, the polishing disc 130 includes a housing 131, a driving shaft 134, and a planetary gear set 140, wherein the housing 131 includes a first mounting plate 132; the drive shaft 134 is rotatably coupled to the first mounting plate 132; the planetary gear set 140 is disposed in the case 131, and the planetary gear set 140 includes: a drive gear 141, at least two driven gears 142, and at least two planetary grinding disks 144; the drive gear 141 is fixed to the drive shaft 134; each driven gear 142 is fixed with a driven shaft, each driven gear 142 is in transmission connection with the driving gear 141, and one end of each driven shaft can pass through the first mounting plate 132 in a rotating way; each planetary grinding disc 144 is arranged in one-to-one correspondence with each driven shaft and is fixed at one end of the driven shaft penetrating through the first mounting plate 132; the driven shaft is rotationally connected with the first mounting plate 132 by adopting a radial thrust bearing 145, a boss is arranged on a shaft hole of the first mounting plate 132 matched with the driven shaft, the radial thrust bearing 145 is arranged below the boss, and an inner ring of the radial thrust bearing 145 is arranged below the outer ring.

The driving gear 141 and the driven gear 142 may be spur gears, helical gears, or friction wheels, and the fixing manner of each wheel and the shaft may be a key connection, an integrally formed arrangement, an interference fit, or the like, and the rotational connection manner between the driving shaft 134 and the driven shaft and the first mounting plate 132 may be a shaft hole connection or a bearing connection, which is not particularly limited herein.

In some embodiments of the invention, the radial inflow bearing is a tapered roller bearing; the number of the driven gears 142 can be two, three, etc., and the driven gears 142 can be directly meshed with the driving gears 141 or can be connected through a single driving wheel or a driving wheel set, and the structure of the planetary wheel set 140 is also quite many, and the arrangement is not limited in this way.

According to the scheme, the driving shaft 134 can drive the driving gear 141 to rotate, so that the driven gear 142, the driven shaft and the planetary grinding disc 144 are driven by the driving gear 141 to rotate, the planetary grinding disc 144 grinds the terrace, when the grinding disc 130 abuts against the ground, the radial thrust bearing 145 can provide supporting force for the box 131 and parts mounted on the box 131, the driven shaft can bear larger axial force under the action of the radial thrust bearing 145, and the bearing capacity of the grinding disc is stronger.

Referring to fig. 3 to 10, in some embodiments of the present invention, the polishing disc 130 further includes a sun gear 135 and at least two follower gears 143, the sun gear 135 is rotatably connected with the driving shaft 134, and the follower gears 143 are coaxially fixed with the driven shaft and meshed with the sun gear 135. So set up, when drive shaft 134 rotates relative to sun gear 135, planetary grinding disc 144 can not only rotate around the rotation under the drive of drive shaft 134, but also revolve around sun gear 135, and the grinding effect is better.

The sun gear 135 may be a spur gear, a helical gear, or a friction wheel, as well as the follower gear 143, and the sun gear 135 may be fixed to the frame 110 in various manners, and in some embodiments of the present invention, a shaft sleeve is disposed outside the drive shaft 134, and both the frame 110 and the sun gear 135 are fixed to the shaft sleeve, and the shaft sleeve, the sun gear 135 and the shaft sleeve are stationary relative to the frame 110 during polishing operation, and both ends of the shaft sleeve may be bolted to the frame 110 and the sun gear 135, or the sun gear 135 may be directly welded to the frame 110, and the manner in which the sun gear 135 is fixed to the frame 110 is not specifically described herein.

The number of the follower gears 143 may be the same as or different from that of the follower gears 142, for example, three follower gears 142 are provided, each follower gear 142 is meshed with the driving gear 141 and is arranged around the driving shaft 134 at equal intervals, and each follower shaft is fixedly provided with a follower gear 143, which is not particularly limited herein.

Further, in some embodiments of the present invention, the case further includes a second mounting plate 133, the follower gear is disposed above the follower gear at intervals, the second mounting plate 133 is mounted between the follower gear and is rotatably connected to the driven shaft, and the second mounting plate 133 is also rotatably connected to the driving shaft. So set up, box 131 all rotates with the drive shaft through second mounting panel 133 and is connected, and joint strength is higher.

The second mounting plate 133 may be rotatably coupled to the driven shaft, the drive shaft 134, respectively, by a bearing connection, such as a deep groove ball bearing, needle bearing, etc., which is not specifically limited herein,

with continued reference to fig. 3-10, in some embodiments of the present invention, the driven gear 142 includes two long-axis driven gears 1421 and two short-axis driven gears 1422, and the planetary gear set 140 further includes two first transition wheels 146 and two second transition wheels 147; the two first transition wheels 146 are engaged with the driving gear 141 and disposed on opposite sides of the driving gear 141, the two second transition wheels 147 are engaged with the two first transition wheels 146 correspondingly, the two short-shaft driven gears 1422 are engaged with the first transition wheels 146 correspondingly, the two long-shaft driven gears 1421 are engaged with the second transition wheels 147, and the driven shafts of the long-shaft driven gears 1421 pass through the second mounting plate 133 and are fixed with the follower gears 143.

So configured, when the driving gear 141 rotates, the two first transition gears 146 rotate reversely relative to the driving gear 141 under the driving of the driving gear 141, the two second transition gears 147 and the two short-shaft driven gears 1422 rotate forwardly relative to the driving gear 141 under the driving of the first transition gears 146, the two long-shaft driven gears 1421 rotate reversely relative to the driving gear 141 under the driving of the two second transition gears 147, and the two following gears rotate and revolve around the sun gear 135 under the driving of the two long-shaft driven gears 1421. At this time, the two long driven shafts 1423 apply torsion force to the box 131 to drive the box 131 to rotate, the two planetary grinding discs 144 mounted at one ends of the two short driven shafts 1424 are diagonally arranged with the two planetary grinding discs 144 mounted at one ends of the two long driven shafts 1423, and the direction of rotation is opposite, when the grinding operation is performed, the acting forces generated by the planetary grinding discs 144 on the floor surface are balanced, so that the grinding discs 130 can work stably, and each planetary grinding disc 144 rotates and revolves along with the box 131, so that the grinding efficiency is high, and the grinding quality is good.

The axial limiting manner of the driving shaft 134 and the driven shaft mounted on the second mounting plate 133 and the first mounting plate 132 may be by providing a shoulder, a collar or a conical surface, etc., preferably, referring to fig. 12 and 13, in some embodiments of the present invention, the axles of the first transition wheel 146 and the second transition wheel 147 are respectively provided as a step axle 148, the step axle 148 passes through the second mounting plate 133 and the step surface abuts against the second mounting plate 133, and an axle retainer ring is provided at one end of the step axle 148 passing through the second mounting plate 133 and abuts against the second mounting plate 133. So set up, the second mounting panel 133 both sides receive the axial spacing of step axle 148 and for the axle retaining ring respectively, and the reliability of planet mill is higher to convenient assembling.

The long driven shaft 1423 may be fixed to the follower gear 143 by penetrating one end of the second mounting plate 133, the long driven shaft 1423 may be in interference fit with the follower gear 143, the long driven shaft 1423 may be connected to the follower gear 143 by a key, or may be fixed to the follower gear 143 by welding, and the long driven shaft 1423 may be fixed to the follower gear 143 by a variety of methods, which are not particularly limited herein.

Further, with continued reference to fig. 12 and 13, considering that the transition axle passes through the first mounting plate 132 and is rotationally connected with a risk of oil leakage, a seal is required to prevent oil leakage after adding gear oil, so in some embodiments of the present invention, a flat bottom hole 1331 is provided in the first mounting plate 132 corresponding to each transition axle axis position, a threaded blind hole 1332 is provided in the bottom wall of the flat bottom hole 1331, and a flange is provided at one end of the axle of the transition wheel, and the flange is provided with a threaded through hole and is connected with the threaded blind hole 1332 through a threaded connection. So set up, the transition shaft is in box 131 completely, does not have the oil leakage risk, easy maintenance.

Further, considering that the axial force between the first transition wheel 146 and the second transition wheel 147 and the corresponding wheel axle is small and can be ignored, in some embodiments of the present invention, the first transition wheel 146 and the second transition wheel 147 are connected with the corresponding wheel axle by using deep groove ball roller bearings, so as to meet the requirement of flexible rotation of the first transition wheel 146 and the second transition wheel 147.

In order to solve the above problems, referring to fig. 1 to 3, in consideration of the fact that the sun gear 135 and the follower gear 143 are exposed to the outside with a high risk, and stones or other foreign matters bouncing up on the terrace may be caught between the sun gear 135 and the follower gear 143, in some embodiments of the present invention, the grinding disc 130 further includes a top cover 150 mounted on the second mounting plate 133 and covering the sun gear 135 and the follower gear 143; the top cap 150 is provided with the oil filler hole 151, and the second mounting plate 133 is provided with the oil leak hole 1321, and first mounting plate 132 is provided with the oil discharge hole 1333, and the sealing plug is all detachably installed to oil filler hole 151, oil leak hole 1321 and oil discharge hole 1333.

So set up, top cap 150 can separate foreign matter such as shelves stone and prevent sun gear 135 and follow-up gear 143 normal operating to when filling gear oil, can directly add at oil filler point 151, gear oil rethread oil leak hole 1321 leaks into box 131, when changing gear oil, can discharge old and useless fluid through oil discharge hole 1333 again with oil discharge hole 1333 shutoff, and refill new gear oil from oil filler point 151, convenient operation.

The top cover 150 may be mounted on the second mounting plate 133 in various manners, and may be fastened by bolts, or may be fastened by clamping, and the material of the top cover 150 may be plastic, aluminum alloy, or the like, and is not particularly limited.

Further, in order to ensure tightness between the top cover 150 and the second mounting plate 133, in some embodiments of the present invention, a sealing strip is provided at a contact surface between the lower end of the top cover 150 and the second mounting plate 133. So set up, prevent to leave tiny gap and lead to the oil leak problem between top cap and the second mounting panel 133.

The sealing strip may be made of one or more of asbestos, rubber, etc., and the sealing strip may be attached to the top cover 150 by bonding, clamping, etc., which are not limited herein.

Referring to fig. 9, in some embodiments of the present invention, a radial thrust bearing 145 is rotatably connected between the driving shaft 134 and the first mounting plate 132, and an inner ring of the radial thrust bearing 145 is located above an outer ring; the driving shaft 134 is connected with a driving shaft sleeve 136 in a bearing way, each driven shaft is connected with a driven shaft sleeve 149 in a bearing way, the driving shaft sleeve 136 is fixed in the sun gear 135, and one end of each driven shaft sleeve 149 is fixed on the first mounting plate 132. By this arrangement, the friction resistance between the driving shaft 134 and the sun gear 135, and between the driven shaft and the first mounting plate 132 is small, the abrasion between the parts is small, the service life of the parts is prolonged, and in addition, the radial thrust bearing 145 can bear the weight of the parts such as the driving gear 141, so that the bearing capacity of the grinding disc 130 is further improved.

The driving shaft sleeve and the sun gear 135 may be fixed by a key connection, an interference fit, or the like, the driven shaft sleeve 149 may be fixed by a bolt, a threaded connection, or an interference fit, and the bearing may be a deep groove ball bearing or a needle bearing, which are not particularly limited.

Further, referring to fig. 3-6, in order to avoid oil leakage between the driving shaft 134 and the driving shaft sleeve 136, between the top cover 150 and the driving shaft sleeve 136, and between the driven shaft and the driven shaft sleeve 149, in some embodiments of the present invention, the grinding disc 130 further includes a first oil seal 160, a second oil seal 161, and a third oil seal 162, the first oil seal 160 is installed between the driving shaft 134 and the driving shaft sleeve 136, the second oil seal 161 is installed between the top cover 150 and the driving shaft sleeve 136, and the third oil seal 162 is installed between the driven shaft and the driven shaft sleeve 149. So set up, effectively solved above-mentioned problem, in addition, when dismantling and changing first oil blanket 160, second oil blanket 161, can directly follow the outside of abrasive disc 130 and dismantle, when dismantling and changing third oil blanket 162, can dismantle with the planetary disc 1441 after taking down, need not to dismantle box 131 and top cap 150, easy maintenance.

The first oil seal 160, the second oil seal 161 and the third oil seal 162 may be single-type oil seals or assembled-type oil seals, and the materials may be fluororubber, silicone rubber, etc., which are not particularly limited herein.

Referring to fig. 6, in some embodiments of the present invention, each planetary polishing disc 144 includes a planetary disc 1441 and a plurality of grinding heads 1442, a plurality of magnets 1443 are disposed on a surface of the planetary disc 1441 opposite to the first mounting plate 132, and each magnet 1443 is equally spaced around a rotation center of each planetary disc 1441, and each grinding head 1442 is magnetically attracted to each magnet 1443. The arrangement is convenient to detach and replace the grinding heads 1442, the grinding heads 1442 are correspondingly arranged on the magnets 1443 and are equally distributed around the rotation centers of the planetary discs 1441 at equal intervals, the weights are even, and the problem that the planetary discs 144 are unstable in operation due to eccentric force generated by the planetary discs 1441 when rotating at high speed is avoided.

The number of grinding heads 1442 may be two, three, four, etc., and the manner of mounting the magnets 1443 on the first mounting plate 132 may be a clamping manner or may be embedded in the first mounting plate 132 according to the specific application, which is not particularly limited herein.

Considering that the weight of the entire grinding disk 130 is increased when the number of grinding heads 1442 is large, and that the grinding efficiency is low when the number of grinding heads 1442 is small, it is preferable that the grinding heads 1442 are provided with four in some embodiments of the present invention. So set up, on the basis of guaranteeing grinding efficiency, reduced the holistic quality and the cost of abrasive disc 130.

Referring to fig. 9 to 13, in some embodiments of the present invention, each planetary polishing pad 144 includes a planetary pad 1441, each planetary pad 1441 has a connection pad 1444 mounted on a surface facing the case 131, each connection pad 1444 has a mounting hole 1445 and is correspondingly mounted on each driven shaft, and each connection pad 1444 has an elastic member 145 mounted on a surface facing the planetary pad 1441 to elastically abut against each planetary pad 1441. By the arrangement, when the grinding machine faces to uneven road surfaces, the elastic piece 145 between the planetary discs 1441 and the connecting discs 1444 is pressed and deformed, so that the side tilting of the grinding machine is avoided, the grinding heads 1442 on the planetary discs 1441 are always attached to the ground, and the grinding effect is good.

As mentioned above, the elastic members 145 are various, and preferably, referring to fig. 10, in some embodiments of the present invention, each elastic member 145 includes a rubber plate 1451 and a spring 1452, one surface of each rubber plate 1451 is fixed to the connecting plate 1444, the other surface is fixed to the planetary plate 1441, a yielding hole 1453 is formed in the central position of each rubber plate 1451, and each spring 1452 is correspondingly installed in each yielding hole 1453 and is pressed between the connecting plate 1444 and the planetary plate 1441. So set up, when the ground is not level, rubber slab 1451 and spring 1452 all are pressed and exert the reaction force to planetary disc 1441, make bistrique 1442 to the grinding dynamics on protruding ground bigger, grinding efficiency is higher, and the effect is better.

The invention also provides a floor grinder 100, the floor grinder 100 comprises a frame 110, a motor 120, a travelling mechanism and a grinding disc 130, and a driving shaft is in transmission connection with the motor.

The motor 120 may be a gear motor 120, a constant speed motor 120, a speed regulating motor 120, etc., and the motor 120 may be fixed, sliding or rotating mounted on the frame 110 according to the specific application; the driving shaft 134 and the output shaft of the motor 120 may be coaxially connected, or a speed-regulating gear set may be adopted; the running mechanism may be driven by a tire, a crawler belt, a mechanical leg, or the like, and may be automatic, for example, driven by an engine, or may be operated manually by manual pushing, and is not particularly limited.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. An abrasive disk comprising:

the box body comprises a first mounting plate;

the driving shaft is rotationally connected with the first mounting plate;

a drive gear fixed to the drive shaft; and

2. The floor grinding machine of claim 1, wherein the grinding disc further comprises a sun gear rotatably connected to the drive shaft and at least two follower gears coaxially fixed in meshing engagement with the sun gear with the driven shaft.

3. The floor grinding machine of claim 2, wherein the housing further comprises a second mounting plate, the follower gear being spaced above the follower gear, the second mounting plate being mounted between the follower gear and being rotatably connected to the driven shaft, the second mounting plate further being rotatably connected to the drive shaft.

4. The floor grinding machine of claim 3, wherein the driven gears comprise two major axis driven gears and two minor axis driven gears, the planetary gear set further comprising two first transition wheels and two second transition wheels;

5. The floor grinding machine of claim 4, wherein the axles of the first transition wheel and the second transition wheel are respectively provided with a step shaft, the step shaft passes through the second mounting plate and the step surface abuts against the second mounting plate, and a shaft retainer ring is arranged at one end of the step shaft passing through the second mounting plate and abuts against the second mounting plate.

6. The floor grinding machine of claim 4, wherein the first mounting plate is provided with a flat bottom hole corresponding to the axis of each transition wheel, a threaded blind hole is formed in the bottom wall of the flat bottom hole, a flange is arranged at one end of the wheel shaft of the transition wheel, and a threaded through hole is formed in the flange and connected with the threaded blind hole through a threaded connecting piece.

7. The floor grinding machine of claim 3, wherein said grinding pan further includes a top cover mounted to said second mounting plate and covering said sun gear with said follower gear;

8. The floor grinding machine of claim 7, wherein a radial thrust bearing is rotatably connected between the drive shaft and the first mounting plate, and an inner race of the radial thrust bearing is positioned above an outer race;

9. The floor grinding machine of claim 8, wherein the grinding disc further comprises a first oil seal mounted between the drive shaft and the drive shaft sleeve, a second oil seal mounted between the top cover and the drive shaft sleeve, and a third oil seal mounted between the driven shaft and the driven shaft sleeve.

10. The floor grinding machine of claim 1, wherein each of the planetary grinding plates includes a planetary plate and a plurality of grinding heads, a face of the planetary plate facing away from the first mounting plate is provided with a plurality of magnets, each of the magnets is equally spaced around a rotation center of each of the planetary plates, and each of the grinding heads is magnetically attracted to each of the magnets.

11. The floor grinding machine of claim 1, wherein each of the planetary grinding plates includes a planetary plate, a connection plate is mounted on a surface of each of the planetary plates facing the box body, each connection plate is provided with a mounting hole and is correspondingly mounted with each driven shaft, and an elastic member is mounted on a surface of each connection plate facing the planetary plate to elastically abut against each of the planetary plates.

12. A floor grinding machine, characterized by comprising a frame, a motor, a travelling mechanism and a grinding disc according to any one of claims 1 to 11, wherein the driving shaft is in transmission connection with the motor, and the travelling mechanism is used for assisting the floor grinding machine to advance.