Plane grinding and cutting device

Abstract

The utility model belongs to the technical field of grinding and cutting, and particularly relates to a plane grinding and cutting device. The plane grinding and cutting device comprises a grinding and cutting tool head, a fixed protective cover, a movable protective cover and an elastic piece. The grinding and cutting tool head is used for grinding or cutting a workpiece; the fixed protective cover covers the grinding and cutting tool head; the movable protective cover is connected to the fixed protective cover and can move in the axial direction of the fixed protective cover, and a supporting face is formed at the bottom of the movable protective cover and used for making contact with the surface of a workpiece. One end of the elastic piece is connected with the fixed protective cover, the other end of the elastic piece is connected with the movable protective cover, and the elastic piece is configured to be shrunk when the supporting face is close to the grinding and cutting tool head. By means of the plane grinding and cutting device in the technical scheme, it can be guaranteed that the surface of a workpiece is trimmed to be flat and smooth, the situation that a grinding and cutting tool head is stuck is not likely to happen, and therefore the probability of production failures is reduced, and personal injuries caused by improper use of the device are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of polishing and cutting, and particularly relates to a planar polishing and cutting device. BACKGROUND

[0002] In the process of metal product processing, because of process requirements or in the pursuit of beauty, the protruding part of the product surface often needs to be polished. This operation requires high precision, and the product surface needs to have high flatness and smoothness after polishing. Similarly, the workpiece to be cut requires good flatness after cutting. The polishing and cutting device is a commonly used device in the process of metal product processing, but the existing polishing device has some defects.

[0003] At present, since the existing polishing and cutting device does not have a planar limiting support structure, the flatness of the processed workpiece is completely determined by the technical level of the operator, which requires a higher level of operator and poor product consistency. On the other hand, it is also easy to cause the tool head to be stuck due to unstable hand holding, resulting in faults and personal injury and other adverse problems.

[0004] Therefore, it is urgent to propose a planar polishing and cutting device to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to at least solve the problem of difficult control of the flatness of the workpiece after polishing or cutting. The purpose is achieved by the following technical solutions:

[0006] The utility model discloses a planar polishing and cutting device, comprising:

[0007] A polishing and cutting tool head is used for polishing or cutting a workpiece;

[0008] A fixed protective cover is arranged on the polishing and cutting tool head;

[0009] A movable protective cover is connected to the fixed protective cover and can move along the axial direction of the fixed protective cover, the bottom of the movable protective cover forms a support surface, and the support surface is used for contacting the surface of the workpiece;

[0010] An elastic member is connected to one end of the fixed protective cover, and the other end of the elastic member is connected to the movable protective cover, and the elastic member is configured to contract when the support surface is close to the polishing and cutting tool head.

[0011] When the planar polishing and cutting device is used, the protruding part on the workpiece is polished by rotating the polishing and cutting tool head, or the workpiece is cut by the polishing and cutting tool head; the polishing and cutting tool head is covered by the fixed protective cover, on one hand, the fixed protective cover can prevent the dust or debris generated in the polishing process from flying, and on the other hand, the fixed protective cover is used to connect the movable protective cover. The movable protective cover is connected with the fixed protective cover through the elastic member, and in the polishing process, the supporting surface of the movable protective cover is pressed on the surface of the workpiece, the elastic member is contracted under the pressure, and under the action of the restoring force of the elastic member, the movable protective cover is always stably attached to the surface of the workpiece, at the same time, the supporting surface moves towards the direction close to the polishing and cutting tool head until the polishing and cutting tool head contacts the position to be polished, so as to polish or over-polish. Since the operator needs to overcome the restoring force of the elastic member to move the supporting surface close to the surface of the polishing and cutting tool head, the stability when the polishing and cutting tool head contacts the workpiece is easy to control, and the workpiece is prevented from being uneven after polishing due to unstable operation of the operator. Similarly, in the cutting process, under the action of the restoring force of the elastic member, the movable protective cover can be stably supported on the surface of the workpiece, and the flatness of the cutting can be ensured. Compared with the case that the cutting perpendicularity is completely controlled by human, the planar polishing and cutting device can effectively improve the consistency of the workpiece. In conclusion, since the polishing or cutting process is stable and controllable, the surface of the workpiece can be polished to be smooth and smooth. In addition, since the operator can easily and stably control the polishing or cutting process, the polishing and cutting tool head is not easy to be stuck, thereby reducing the probability of production failure and reducing personal injury caused by improper use of the device.

[0012] In addition, the planar polishing and cutting device according to the utility model can also have the following additional technical features:

[0013] In some embodiments of the utility model, the movable protective cover comprises a connecting sleeve and an extension plate, the connecting sleeve is sleeved on the outside of the fixed protective cover and can move along the axial direction of the fixed protective cover, and the extension plate is circumferentially arranged along the bottom of the connecting sleeve, and the bottom of the extension plate forms the supporting surface.

[0014] In some embodiments of the utility model, the fixed protective cover is provided with a connecting piece, the connecting piece is provided with a guide hole, a guide piece is movably arranged in the guide hole, the bottom of the guide piece is connected with the extension plate, the guide piece can move along the axial direction of the fixed protective cover in the guide hole, the elastic member is sleeved on the guide piece, one end of the elastic member abuts against the connecting piece, and the other end of the elastic member abuts against the extension plate.

[0015] In some embodiments of the utility model, the connecting piece is provided with an adjusting bolt, the adjusting bolt is in threaded connection with the connecting piece, and the bottom of the adjusting bolt is used for abutting against the top of the connecting sleeve.

[0016] In some embodiments of the utility model, the planar polishing and cutting device further comprises a housing, the housing is internally provided with a driving assembly and a transmission assembly, the transmission assembly and the driving assembly are in transmission connection, the polishing and cutting tool head and the transmission assembly are in transmission connection, the driving assembly is used for driving the transmission assembly to rotate, and the transmission assembly is used for driving the polishing and cutting tool head to rotate.

[0017] In some embodiments of the utility model, the housing is provided with an auxiliary handle.

[0018] In some embodiments of the utility model, the top of the fixed protective cover is provided with a hoop, the housing comprises a connecting seat, and the hoop is sleeved on the connecting seat.

[0019] In some embodiments of the utility model, the inner wall of the hoop is provided with a positioning protrusion, the outer periphery of the connecting seat is provided with a positioning groove, and the positioning protrusion is arranged in the interior of the positioning groove.

[0020] In some embodiments of the utility model, the fixed protective cover comprises a top plate and a guide sleeve, the guide sleeve is arranged along the outer periphery of the top plate, the movable protective cover is sleeved on the outer side of the guide sleeve, the top plate is provided with an avoiding opening allowing the transmission assembly to pass through, and the hoop is connected to the edge of the avoiding opening.

[0021] In some embodiments of the utility model, the fixed protective cover is provided with a first observation opening, the movable protective cover is provided with a second observation opening, the second observation opening and the first observation opening are arranged opposite to each other, and the first observation opening and the second observation opening are used for observing the polishing and cutting tool head. BRIEF DESCRIPTION OF DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to be limiting in any respect. In the drawings:

[0023] Figure 1 A structural schematic view of a planar polishing and cutting device according to an embodiment of the utility model is schematically shown;

[0024] Figure 2An exploded view of the planar polishing and cutting device according to the embodiment of the present application is schematically shown;

[0025] Figure 3 A partial structure schematic view of the planar polishing and cutting device according to the embodiment of the present application is schematically shown;

[0026] Figure 4 A structure schematic view of the fixed protective cover according to the embodiment of the present application is schematically shown;

[0027] Figure 5 A structure schematic view of the movable protective cover according to the embodiment of the present application is schematically shown.

[0028] The various reference signs in the drawings represent the following:

[0029] 100, polishing and cutting tool head;

[0030] 210, fixed protective cover; 211, top plate; 212, guide sleeve; 213, clamp; 2131, positioning protrusion; 2132, fixing ring; 2133, elastic ring; 2134, first extension part; 2135, second extension part; 214, locking pin; 215, locking wrench; 216, first observation port; 220, movable protective cover; 221, connecting sleeve; 222, extension plate; 223, second observation port; 224, connecting column; 230, elastic member; 240, connecting member; 250, guide member; 260, adjusting bolt;

[0031] 310, auxiliary handle; 320, connecting seat; 321, positioning groove; 322, first connecting ring; 323, connecting convex rib; 324, second connecting ring; 330, first shell; 340, second shell; 350, third shell; 360, switch button;

[0032] 410, transmission shaft; 420, driven wheel; 430, rolling bearing; 440, first fixing disc; 450, second fixing disc;

[0033] 510, driving member; 520, driving wheel. DETAILED DESCRIPTION

[0034] Exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and so that the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0035] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0036] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of example embodiments.

[0037] Spatially relative terms, such as "inner", "outer", "beneath", "below", "lower", "above", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0038] Figure 1 A structural schematic diagram of a planar polishing and cutting device according to an embodiment of the present application is schematically shown. Figure 2 An exploded view of a planar polishing and cutting device according to an embodiment of the present application is schematically shown. As Figure 1 and Figure 2The utility model provides a kind of plane polishing cutting device, including polishing cutting tool head 100, fixed protective cover 210, movable protective cover 220 and elastic member 230;Polishing cutting tool head 100 is used to polish or cut workpiece;Fixed protective cover 210 is covered in polishing cutting tool head 100;Movable protective cover 220 is connected in fixed protective cover 210 and can move along the axial direction of fixed protective cover 210, the bottom of movable protective cover 220 forms support surface, and support surface is used to contact with the surface of workpiece;One end of elastic member 230 and fixed protective cover 210 are connected, the other end of elastic member 230 and movable protective cover 220 are connected, and elastic member 230 is configured as support surface is close to polishing cutting tool head 100, and elastic member 230 shrinks.

[0039] When using the plane polishing cutting device in the present technical solution, the protruding parts on the workpiece are polished by rotating the polishing cutting tool head 100, or the workpiece is cut by the polishing cutting tool head 100;The polishing cutting tool head 100 is covered by the fixed protective cover 210, which can prevent dust or debris generated during polishing from flying, and the fixed protective cover 210 is used to connect the movable protective cover 220. The movable protective cover 220 is connected to the fixed protective cover 210 by the elastic member 230. During polishing, the support surface of the movable protective cover 220 is pressed against the surface of the workpiece, and the elastic member 230 is contracted under pressure. Under the action of the restoring force of the elastic member 230, the movable protective cover 220 is always stably attached to the surface of the workpiece. At the same time, the support surface moves towards the direction of the polishing cutting tool head 100 until the polishing cutting tool head 100 contacts the position to be polished, thereby polishing. Since the operator needs to overcome the restoring force of the elastic member 230 to move the support surface towards the surface of the polishing cutting tool head 100, the stability of the contact between the polishing cutting tool head 100 and the workpiece is easily controlled, preventing the workpiece from being unevenly polished or over-polished due to unstable operation by the operator. Similarly, during cutting, the movable protective cover 220 can be stably supported on the surface of the workpiece under the action of the restoring force of the elastic member 230, which can ensure the flatness of the cut. Compared to the case where the cutting perpendicularity is completely controlled by human, the use of the plane polishing cutting device in the present technical solution can effectively improve the consistency of the workpiece. In summary, due to the stable and controllable polishing or cutting process, the surface of the workpiece can be polished smoothly. In addition, since the operator can easily and stably control the polishing or cutting process, it is not easy to cause the polishing cutting tool head 100 to be stuck, thereby reducing the probability of production failure and reducing personal injury caused by improper use of the device.

[0040] Optionally, the polishing and cutting tool head 100 can be in a circular plate shape or a cylindrical shape, and the diameter thereof can be 10-300 mm. For example, the diameter of the polishing and cutting tool head 100 can be 10 mm, 50 mm, 200 mm, 250 mm or 300 mm, etc. For example, the polishing and cutting tool head 100 can be a metal milling cutter, or a saw blade or a steel wire brush, etc. According to the type of the polishing and cutting tool head 100, the planar polishing and cutting device can be used for workpiece cutting or polishing. It can be understood that, under the action of the restoring force of the elastic member 230, the movable protective cover 220 can be stably supported on the surface of the workpiece, and the quality of the workpiece polishing or cutting is reduced by the influence of the technical level of the operator, so that whether the workpiece is polished or cut, the surface of the workpiece can be finished flat and smooth.

[0041] Optionally, the workpiece can be glass steel or sheet metal that needs to be polished or cut.

[0042] Further, Figure 3 The partial structure schematic view of the planar polishing and cutting device according to the embodiment of the present application is schematically shown. Referring to Figure 2 and Figure 3 The planar polishing and cutting device further comprises a housing, the inside of the housing is provided with a driving assembly and a transmission assembly, the transmission assembly and the driving assembly are in transmission connection, the polishing and cutting tool head 100 and the transmission assembly are in transmission connection, the driving assembly is used for driving the transmission assembly to rotate, and the transmission assembly is used for driving the polishing and cutting tool head 100 to rotate.

[0043] Optionally, the driving assembly comprises a driving member 510 and a driving wheel 520, a fixed end of the driving member 510 is fixedly connected with the shell, the driving wheel 520 is fixedly connected with an output end of the driving member 510, and the driving member 510 is configured to drive the driving wheel 520 to rotate. Optionally, the driving member 510 can be a motor. Optionally, the transmission assembly can be a speed reduction mechanism. The transmission assembly is configured to ensure that the polishing and cutting tool head 100 rotates stably. Of course, in some embodiments, the transmission assembly can not be provided, and the polishing and cutting tool head 100 is directly and transmissionally connected with the driving assembly. Optionally, the transmission assembly comprises a transmission shaft 410 and a driven wheel 420, and the driven wheel 420 is transmissionally connected with the driving wheel 520. Optionally, the driving wheel 520 and the driven wheel 420 are both gears, and the driving wheel 520 and the driven wheel 420 are in meshing transmission. The driven wheel 420 is fixedly connected with a top portion of the transmission shaft 410, and the polishing and cutting tool head 100 is fixedly connected with a bottom portion of the transmission shaft 410. When the driving wheel 520 drives the driven wheel 420 to rotate, the driven wheel 420 drives the transmission shaft 410 to rotate synchronously, and the transmission shaft 410 drives the polishing and cutting tool head 100 to rotate, so that the workpiece is polished or cut. Optionally, the bottom portion of the transmission shaft 410 is sleeved with a first fixed disc 440 and a second fixed disc 450, and the polishing and cutting tool head 100 is clamped between the first fixed disc 440 and the second fixed disc 450.

[0044] Optionally, the transmission shaft 410 is sleeved with a rolling bearing 430, the rolling bearing 430 comprises a bearing inner ring, a bearing outer ring and rolling bodies, the rolling bodies are arranged between the bearing inner ring and the bearing outer ring, the bearing inner ring is fixedly connected with the transmission shaft 410, the bearing outer ring is fixedly connected with the shell, the transmission shaft 410 drives the bearing inner ring to rotate when the transmission shaft 410 rotates, the bearing inner ring drives the rolling bodies to rotate, and the rolling bodies are in rolling contact with the bearing outer ring. The rolling bearing 430 is configured to make the transmission more stable.

[0045] Optionally, the shell comprises a first shell 330, a second shell 340 and a third shell 350. The first shell 330 covers the transmission assembly, the driving member 510 is arranged inside the second shell 340, and the third shell 350 is internally arranged with a battery. The battery is arranged on one side of the driving member 510 and is electrically connected with the driving member 510, for providing electric energy for the driving member 510. Optionally, the battery can be a primary battery, and after the battery is used up, the operator can replace the battery. The battery can also be a secondary battery, and after the battery is used up, the battery can be charged. Of course, the planar polishing and cutting device can also be directly connected to an alternating current power supply. Optionally, the shell is provided with a switch button 360, and when the switch button 360 is pressed, the power supply is turned on, and the polishing or cutting work can be carried out. After the operation is completed, the switch button 360 is pressed in time to turn off the power supply, so as to prevent the polishing and cutting tool head 100 from rotating due to accidental touch and avoid causing harm to the personnel. Optionally, the second shell 340 is arranged in a structure convenient for the operator to hold, so as to ensure that the operator can comfortably hold the polishing and cutting device. Optionally, the second shell 340 is provided with a protective rib or a non-slip pad, so as to prevent the polishing and cutting device from slipping out of the operator's hand.

[0046] Further, the shell is provided with an auxiliary handle 310. Optionally, the auxiliary handle 310 is connected to the first shell 330, that is, arranged above the polishing and cutting tool head 100. It can be understood that the operator can press the polishing and cutting device downward through the auxiliary handle 310, which is very convenient for the operator to hold. When operating, the operator holds the second shell 340 with one hand and presses the auxiliary handle 310 with the other hand, so that the movable protective cover 220 moves upward relative to the fixed protective cover 210, so that the polishing and cutting tool head 100 contacts the workpiece. Optionally, the auxiliary handle 310 comprises a holding section and connecting sections arranged at both ends of the holding section, respectively, and the holding section is connected to the first shell 330 through the connecting sections. Optionally, the length direction of the holding section is perpendicular to the axial direction of the second shell 340, so as to facilitate the operator to hold and meet the ergonomic design concept.

[0047] Further, Figure 4 The structure of the fixed protective cover 210 according to the embodiment of the utility model is schematically shown. Referring to Figures 2 to 4The top of the fixed protective cover 210 is provided with a hoop 213, and the shell further comprises a connecting seat 320, and the hoop 213 is sleeved on the connecting seat 320. Further, the connecting seat 320 is sleeved on the outside of the rolling bearing 430, and the bearing outer ring is fixedly connected with the inner wall of the connecting seat 320. Optionally, the connecting seat 320 comprises a first connecting ring 322, a connecting convex rib 323 and a second connecting ring 324 connected in sequence. The first connecting ring 322 is connected with the first shell 330. Optionally, the outer side of the first connecting ring 322 is provided with external threads, and the inner side of the bottom of the first shell 330 is provided with internal threads, so that the first connecting ring 322 and the first shell 330 are screw-connected through the external threads and the internal threads. Preferably, the connecting convex rib 323 is connected with the first shell 330 through bolts. Specifically, the connecting convex rib 323 is provided with through holes for the bolts to pass through, and correspondingly, the bottom of the first shell 330 is provided with threaded holes, so that when the connecting seat 320 and the first shell 330 are assembled, the bolts pass through the through holes on the connecting convex rib 323, and the bolts are screw-connected with the threaded holes on the first shell 330. The second connecting ring 324 is used to connect with the hoop 213.

[0048] Optionally, the hoop 213 comprises a fixed ring 2132 and an elastic ring 2133, both of which are arc-shaped structures, and the fixed ring 2132 and the elastic ring 2133 are connected to form an open ring structure capable of sleeving the second connecting ring 324. Optionally, one end of the elastic member 230 is connected with the fixed ring 2132, and the bottom is suspended to form a certain adjustment space for the elastic member 230. Further, the end of the fixed ring 2132 not connected with the elastic ring 2133 is provided with a first extension 2134, and the end of the elastic ring 2133 not connected with the fixed ring 2132 is provided with a second extension 2135, the first extension 2134 and the second extension 2135 are oppositely arranged, and the first extension 2134 and the second extension 2135 are respectively provided with through holes for passing the locking pin 214. In an embodiment, the locking pin 214 can be a locking bolt, when locking, the locking bolt is sequentially passed through the first extension 2134 and the second extension 2135, and a nut is sleeved on the locking bolt, and the nut is tightened, so that the hoop 213 is tightly sleeved on the connecting seat 320. In another embodiment, the locking pin 214 comprises a pin body, a limiting portion and a connecting portion, the limiting portion and the connecting portion are respectively arranged at both ends of the pin body, the pin body is passed through the first extension 2134 and the second extension 2135, the limiting portion is located on one side of the first extension 2134, and the connecting portion is located on one side of the second extension 2135. The connecting portion is connected with the locking wrench 215, the locking wrench 215 and the connecting portion are rotatably connected, by rotating the locking wrench 215, the limiting portion will abut against the first extension 2134, and at the same time, the locking wrench 215 abuts against the second extension 2135, so that the hoop 213 tightly holds the connecting seat 320. Optionally, the connecting portion of the locking wrench 215 and the connecting portion are provided with an arc-shaped portion. In the clockwise direction, the distance from the outer periphery of the arc-shaped portion to the center of rotation of the arc-shaped portion gradually increases, so that when the locking wrench 215 is rotated in the clockwise direction, the arc-shaped portion can gradually push the second extension 2135 to move close to the first extension 2134, at the same time, the locking wrench 215 is buckled on the elastic ring 2133, and the hoop 213 tightly holds the second connecting ring 324. Optionally, a gasket is arranged between the arc-shaped portion and the first extension 2134, which can make the first extension 2134 bear force evenly and prevent the first extension 2134 from being worn or broken.

[0049] Further, Figures 2 to 4The inner wall of the hoop 213 is provided with positioning protrusions 2131, and the outer periphery of the second connecting ring 324 is provided with positioning grooves 321, and the positioning protrusions 2131 are arranged inside the positioning grooves 321. In the embodiment, the positioning protrusions 2131 are cuboid protrusions, and the number of the positioning protrusions 2131 is multiple, and the multiple positioning protrusions 2131 are arranged at intervals. In other embodiments, the positioning protrusions 2131 can also be columnar protrusions or annular protrusions arranged circumferentially along the inner wall of the hoop 213. The number of the positioning protrusions 2131 can be one or multiple. In the embodiment, the positioning grooves 321 are annular grooves arranged on the outer side of the second connecting ring 324, and in other embodiments, the shape and number of the positioning grooves 321 can be arranged according to the positioning protrusions 2131, so that the positioning protrusions 2131 can be inserted into the positioning grooves 321 one by one. Through the cooperation of the positioning protrusions 2131 and the positioning grooves 321, the stable connection of the connecting seat 320 and the hoop 213 can be achieved, and the falling of the connecting seat 320 from the hoop 213 can be effectively prevented. Optionally, the positioning protrusions 2131 can be arranged on the fixed ring 2132 or the elastic ring 2133, of course, the positioning protrusions 2131 can also be arranged on both the fixed ring 2132 and the elastic ring 2133. In other embodiments, the positioning protrusions 2131 can also be arranged on the outer periphery of the second connecting ring 324, and the positioning grooves 321 can be arranged on the inner wall of the hoop 213.

[0050] Referring to Figure 3 and Figure 4 The fixed protective cover 210 comprises a top plate 211 and a guide sleeve 212, the guide sleeve 212 is arranged along the outer periphery of the top plate 211, the movable protective cover 220 is arranged outside the guide sleeve 212, the top plate 211 is provided with an avoiding opening allowing the transmission assembly to pass through, and the hoop 213 is connected to the edge of the avoiding opening. The top plate 211 is substantially a circular plate structure, the avoiding opening is a circular opening, the transmission shaft 410 passes through the avoiding opening and is connected with the polishing and cutting tool head 100. The hoop 213 is connected to the edge of the through hole, wherein the bottom of the fixed ring 2132 is fixedly connected with the top plate 211, and the bottom of the elastic ring 2133 is not connected with the top plate 211, but there is a certain gap, so that the elastic ring 2133 has a certain movement range. It can be understood that the guide sleeve 212, the movable protective cover 220 and the polishing and cutting tool head 100 are concentrically arranged, and the guide sleeve 212 can guide the movable protective cover 220, so that the movable protective cover 220 moves stably along the axial direction of the polishing and cutting tool head 100.

[0051] Further, Figure 5 The structure schematic diagram of the movable protective cover 220 according to the embodiment of the utility model is schematically shown. Referring to Figures 3 to 5The movable protective cover 220 comprises a connecting sleeve 221 and an extension plate 222. The connecting sleeve 221 is sleeved on the outside of the fixed protective cover 210 and can move along the axial direction of the fixed protective cover 210. The extension plate 222 is arranged along the bottom of the connecting sleeve 221 in a circumferential direction, and the bottom of the extension plate 222 forms a support surface. Optionally, the connecting sleeve 221 is in the form of a ring-shaped sleeve structure. The height of the connecting sleeve 221 is set according to the use requirement. Since the movable protective cover 220 needs to move along the axial direction of the fixed protective cover 210, it is necessary to ensure that the connecting sleeve 221 is always sleeved on the fixed protective cover 210 during the movement, so as to avoid that the top of the connecting sleeve 221 is separated from the bottom of the fixed protective cover 210, thereby avoiding the dislocation between the movable protective cover 220 and the fixed protective cover 210. The extension plate 222 is in the form of a ring-shaped plate structure. The extension plate 222 is arranged perpendicularly to the axial direction of the connecting sleeve 221, and the inner edge of the extension plate 222 is connected to the bottom end of the connecting sleeve 221, and the outer edge of the extension plate 222 extends away from the center line of the connecting sleeve 221. It can be understood that, by arranging the extension plate 222, the contact area between the movable protective cover 220 and the workpiece surface can be increased, thereby increasing the stability when the movable protective cover 220 contacts the workpiece, which is helpful to achieve a smooth workpiece surface. In an embodiment, the extension plate 222 can also not be arranged. In the process of polishing or cutting, the bottom end of the connecting sleeve 221 directly contacts the workpiece. In another embodiment, the outer edge of the extension plate 222 can be connected to the bottom end of the connecting sleeve 221, so that the inner edge of the extension plate 222 extends towards the center line of the connecting sleeve 221. Of course, the connecting sleeve 221 can also be connected between the outer edge and the inner edge of the extension plate 222. The position and width of the extension plate 222 are set according to the use requirement, which requires that the movable protective cover 220 can be stably supported on the workpiece surface, and also avoids interference with the polishing or cutting tool head 100. Optionally, the connecting sleeve 221 and the extension plate 222 can be in the form of an integral structure.

[0052] Further, the fixed protective cover 210 is provided with a connecting piece 240, the connecting piece 240 is provided with a guide hole, a guide piece 250 is movably arranged in the guide hole, the bottom of the guide piece 250 is connected to the extension plate 222, the guide piece 250 can move along the axial direction of the fixed protective cover 210 in the guide hole, and the elastic piece 230 is sleeved on the guide piece 250. One end of the elastic piece 230 abuts against the connecting piece 240, and the other end of the elastic piece 230 abuts against the extension plate 222.

[0053] Optionally, the connecting piece 240 is fixedly connected to the top plate 211, and the connecting manner between the connecting piece 240 and the top plate 211 can be threaded connection, adhesion or welding, etc. Optionally, the number of the connecting pieces 240 can be multiple, and the multiple connecting pieces 240 are arranged along the circumference of the fixed protective cover 210. Illustratively, the number of the connecting pieces 240 is three, and the interval between each adjacent two connecting pieces 240 is equal. It can be understood that the guide piece 250 is arranged on each connecting piece 240, and the elastic piece 230 is sleeved on each guide piece 250. By arranging multiple elastic pieces 230, the stress balance of the movable protective cover 220 can be ensured, so that the movable protective cover 220 can be stably moved and easily controlled during use. Optionally, the guide piece 250 can be a rod structure with a circular cross section, and the guide hole is a circular hole. Preferably, the top of the guide piece 250 is provided with an anti-disengagement part. When the operator releases the auxiliary handle 310, the elastic piece 230 will rebound relying on its own restoring force. During the rebounding process of the elastic piece 230, the guide piece 250 moves downward relative to the guide hole. By arranging the anti-disengagement part, the guide piece 250 can be prevented from moving out of the guide hole, so that the movable protective cover 220 cannot be moved upward due to the misalignment of the guide piece 250 with the guide hole. In other embodiments, the length of the guide piece 250 can also be arranged to be greater than the initial state of the elastic piece 230 when it is not compressed, so that the guide piece 250 is prevented from exiting the guide hole. Optionally, the elastic piece 230 can be a compression spring. By sleeving the elastic piece 230 on the guide piece 250, the elastic piece 230 can be prevented from tilting during the compression and automatic rebounding process. Further, referring to Figure 5 , the extension plate 222 is provided with a connecting column 224 for connecting the guide piece 250. In an embodiment, the guide piece 250 is a bolt, and the connecting column 224 is provided with a threaded hole, and the guide piece 250 and the connecting column 224 are threadedly connected. By adopting this structure, the assembly between components can be facilitated, and the assembly process is simplified.

[0054] Continuing to refer to Figure 3 , the connecting piece 240 is provided with an adjusting bolt 260, the adjusting bolt 260 and the connecting piece 240 are threadedly connected, and the bottom of the adjusting bolt 260 is used for abutting against the top of the connecting sleeve 221. It can be understood that by rotating the adjusting bolt 260, the length of the adjusting bolt 260 extending downward from the connecting piece 240 can be adjusted. When the support surface of the movable protective cover 220 approaches the polishing and cutting tool head 100, the adjusting bolt 260 can limit the movement distance of the movable protective cover 220, so as to limit the polishing or cutting depth, and avoid excessive polishing or cutting.

[0055] Referring to Figures 3 to 5The first observation opening 216 is arranged on the fixed protective cover 210, and the second observation opening 223 is arranged on the movable protective cover 220, the second observation opening 223 and the first observation opening 216 are arranged opposite to each other, and the first observation opening 216 and the second observation opening 223 are used for observing the polishing and cutting tool head 100. The rotating state of the polishing and cutting tool head 100 can be observed through the first observation opening 216 and the second observation opening 223, and whether the polishing and cutting tool head 100 is normally operated is determined.

[0056] The polishing and cutting device provided by the technical scheme is used as follows:

[0057] The length of the adjusting screw bolt 260 is adjusted by screwing, the maximum distance of the movable protective cover 220 relative to the fixed protective cover 210 is determined, and the polishing or cutting degree is avoided to be too large. The power supply is turned on by pressing the switch button 360. The polishing and cutting tool head 100 is aligned with the position of the workpiece to be polished or cut, one hand holds the auxiliary handle 310 and presses downward, the supporting surface of the movable protective cover 220 is pressed on the surface of the workpiece, at this time, the elastic member 230 is contracted, the supporting surface gradually approaches the polishing and cutting tool head 100 until the polishing and cutting tool head 100 is in contact with the workpiece. At the same time, the driving assembly is started, the driving assembly drives the transmission assembly to rotate, the transmission assembly drives the polishing and cutting tool head 100 to rotate, and the polishing or cutting work is performed. During the polishing or cutting process, the supporting surface can be stably attached to the surface of the workpiece due to the restoring force of the elastic member 230, so that the operation process is stable and the flatness of the workpiece is easy to control. After the polishing or cutting is completed, the auxiliary handle 310 is released, the elastic member 230 rebounds and drives the movable protective cover 220 to reset. After the operation is completed, the power supply is turned off by pressing the switch button 360.

[0058] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A planar abrasive cutting device, characterized in that, The planar polishing and cutting device comprises: a polishing and cutting tool head (100) for polishing or cutting a workpiece; a fixed protective cover (210) covering the polishing and cutting tool head (100); a movable protective cover (220) connected to the fixed protective cover (210) and capable of moving along the axial direction of the fixed protective cover (210), the bottom of the movable protective cover (220) forming a support surface for contacting the surface of the workpiece; a resilient member (230) having one end connected to the fixed protective cover (210) and the other end connected to the movable protective cover (220), the resilient member (230) being configured to contract when the support surface is close to the polishing and cutting tool head (100).

2. The apparatus of claim 1, wherein, The movable protective cover (220) comprises a connecting sleeve (221) and an extension plate (222), the connecting sleeve (221) being sleeved on the outside of the fixed protective cover (210) and capable of moving along the axial direction of the fixed protective cover (210), the extension plate (222) being circumferentially arranged on the bottom of the connecting sleeve (221), the bottom of the extension plate (222) forming the support surface.

3. The apparatus of claim 2, wherein, The fixed protective cover (210) is provided with a connecting member (240), the connecting member (240) being provided with a guide hole, a guide member (250) being movably arranged in the guide hole, the bottom of the guide member (250) being connected to the extension plate (222), the guide member (250) being capable of moving along the axial direction of the fixed protective cover (210) in the guide hole, the resilient member (230) being sleeved on the guide member (250), one end of the resilient member (230) abutting against the connecting member (240), the other end of the resilient member (230) abutting against the extension plate (222).

4. The apparatus of claim 3, wherein, An adjusting bolt (260) is arranged through the connecting member (240), the adjusting bolt (260) being threadedly connected to the connecting member (240), the bottom of the adjusting bolt (260) being used for abutting against the top of the connecting sleeve (221).

5. The apparatus of any of claims 1-4, wherein, The planar polishing and cutting device further comprises a housing, the inside of the housing being provided with a driving assembly and a transmission assembly, the transmission assembly and the driving assembly being in transmission connection, the polishing and cutting tool head (100) and the transmission assembly being in transmission connection, the driving assembly being used for driving the transmission assembly to rotate, the transmission assembly being used for driving the polishing and cutting tool head (100) to rotate.

6. The apparatus of claim 5, wherein, The housing is provided with an auxiliary handle (310).

7. The apparatus of claim 5 wherein, The top of the fixed protective cover (210) is provided with a hoop (213), the housing comprising a connecting seat (320), the hoop (213) being sleeved on the connecting seat (320).

8. The apparatus of claim 7, wherein, The inner wall of the hoop (213) is provided with a positioning protrusion (2131), the outer periphery of the connecting seat (320) is provided with a positioning groove (321), the positioning protrusion (2131) being arranged in the positioning groove (321).

9. The apparatus of claim 7 wherein, The fixed protective cover (210) comprises a top plate (211) and a guide sleeve (212) arranged along the outer periphery of the top plate (211), the movable protective cover (220) is sleeved outside the guide sleeve (212), the top plate (211) is provided with a avoiding port allowing the transmission assembly to pass through, and the hoop (213) is connected to the edge of the avoiding port.

10. The apparatus of any one of claims 1-4, wherein, The fixed protective cover (210) is provided with a first observation port (216), the movable protective cover (220) is provided with a second observation port (223), the second observation port (223) and the first observation port (216) are arranged opposite to each other, and the first observation port (216) and the second observation port (223) are used for observing the polishing and cutting tool head (100).

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