Plane grinding and cutting device

Abstract

The invention 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 invention belongs to the technical field of grinding and cutting, and in particular relates to a plane grinding and cutting device. Background Art

[0002] In the process of metal product processing, it is often necessary to grind the raised parts of the product surface due to process requirements or the pursuit of aesthetics. This operation requires high precision, and the product surface must have high flatness and smoothness after grinding. Similarly, the workpiece to be cut is required to have good flatness after cutting. Grinding and cutting devices are commonly used in the process of metal product processing, but existing grinding devices have some defects.

[0003] At present, since the existing grinding and cutting devices do not have a planar limiting support structure, the flatness of the processed workpiece is completely determined by the technical level of the operator, which places high requirements on the operator and results in poor product consistency. On the other hand, it is also easy for the tool head to get stuck due to unstable hand holding, resulting in malfunctions and personal injuries.

[0004] Therefore, it is urgent to propose a plane grinding and cutting device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to at least solve the problem that the flatness of a workpiece after grinding or cutting is difficult to control. This purpose is achieved through the following technical solutions:

[0006] A first aspect of the present invention provides a plane grinding and cutting device, comprising:

[0007] Grinding and cutting tool heads, used for grinding or cutting workpieces;

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

[0009] A movable protective cover, the 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 supporting surface, and the supporting surface is used to contact the surface of the workpiece;

[0010] An elastic member, one end of which is connected to the fixed protective cover, and the other end of which is connected to the movable protective cover, wherein the elastic member is configured such that when the supporting surface is close to the grinding and cutting tool head, the elastic member contracts.

[0011] When using the plane grinding and cutting device in the technical solution, the raised part on the workpiece is ground by rotating the grinding and cutting tool head, or the workpiece is cut by the grinding and cutting tool head; the grinding and cutting tool head is covered by a fixed protective cover, which can prevent the dust or debris generated during the grinding 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 to the fixed protective cover through an elastic member. During the grinding process, the support surface of the movable protective cover is pressed against the surface of the workpiece, and the elastic member is contracted under pressure. 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 support surface moves in the direction close to the grinding and cutting tool head until the grinding and cutting tool head contacts the position to be ground, thereby grinding or over-grinding. Since the operator needs to overcome the restoring force of the elastic member when making the support surface close to the surface of the grinding and cutting tool head, the stability of the grinding and cutting tool head and the workpiece when in contact is easy to control, preventing the workpiece from being uneven after grinding due to unstable operation of the operator. Similarly, during 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, which can ensure the flatness of the cutting. Compared with the situation where the cutting verticality is completely controlled by humans, the use of the plane grinding and cutting device in the present technical solution can effectively improve the consistency of the workpiece. In summary, since the grinding or cutting process is smooth and controllable, it can be ensured that the surface of the workpiece is trimmed to be smooth and clean. In addition, since the operator can easily and stably control the grinding or cutting process, it is not easy for the grinding and cutting tool head to get stuck, thereby reducing the probability of production failures and reducing personal injuries caused by improper use of the device.

[0012] In addition, the plane grinding and cutting device according to the present invention may also have the following additional technical features:

[0013] In some embodiments of the present invention, the movable protective cover includes a connecting sleeve and an extension plate, the connecting sleeve is arranged on the outside of the fixed protective cover and can move axially along the fixed protective cover, the extension plate is arranged circumferentially along the bottom of the connecting sleeve, and the bottom of the extension plate forms the support surface.

[0014] In some embodiments of the present invention, a connecting piece is provided on the fixed protective cover, a guide hole is provided on the connecting piece, a guide piece is movably penetrated inside the guide hole, the bottom of the guide piece is connected to the extension plate, the guide piece can move axially along the fixed protective cover inside the guide hole, the elastic piece is sleeved on the guide piece, one end of the elastic piece abuts against the connecting piece, and the other end of the elastic piece abuts against the extension plate.

[0015] In some embodiments of the present invention, an adjusting bolt is passed through the connecting member, the adjusting bolt and the connecting member are threadedly connected, and the bottom of the adjusting bolt is used to abut against the top of the connecting sleeve.

[0016] In some embodiments of the present invention, the plane grinding and cutting device also includes a shell, a driving assembly and a transmission assembly are arranged inside the shell, the transmission assembly and the driving assembly are transmission-connected, the grinding and cutting tool head and the transmission assembly are transmission-connected, the driving assembly is used to drive the transmission assembly to rotate, and the transmission assembly is used to drive the grinding and cutting tool head to rotate.

[0017] In some embodiments of the present invention, an auxiliary handle is provided on the housing.

[0018] In some embodiments of the present invention, a clamp is provided on the top of the fixed protective cover, the shell includes a connecting seat, and the clamp is sleeved on the connecting seat.

[0019] In some embodiments of the present invention, a positioning protrusion is provided on the inner wall of the clamp, a positioning groove is provided on the outer periphery of the connecting seat, and the positioning protrusion is arranged inside the positioning groove.

[0020] In some embodiments of the present invention, the fixed protective cover includes 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 outside of the guide sleeve, the top plate is provided with an avoidance opening allowing the transmission assembly to pass through, and the clamp is connected to the edge of the avoidance opening.

[0021] In some embodiments of the present invention, a first observation port is provided on the fixed protective cover, and a second observation port is provided on the movable protective cover. The second observation port and the first observation port are arranged opposite to each other, and the first observation port and the second observation port are used to observe the grinding and cutting tool head. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0023] Figure 1 The schematic diagram of the structure of the plane grinding and cutting device according to the embodiment of the present invention is schematically shown;

[0024] Figure 2 Schematically shows an exploded view of a plane grinding and cutting device according to an embodiment of the present invention;

[0025] Figure 3 A partial structural diagram of a plane grinding and cutting device according to an embodiment of the present invention is schematically shown;

[0026] Figure 4 The structure diagram of the fixed protective cover according to the embodiment of the present invention is schematically shown;

[0027] Figure 5 The structural diagram of the movable protective cover according to the embodiment of the present invention is schematically shown.

[0028] The reference numerals in the accompanying drawings represent the following:

[0029] 100. Grinding cutting tool heads;

[0030] 210, fixed protective cover; 211, top plate; 212, guide sleeve; 213, hoop; 2131, positioning protrusion; 2132, fixed ring; 2133, elastic ring; 2134, first extension; 2135, second extension; 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 ridge; 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 fixed plate; 450, second fixed plate;

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

[0034] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0035] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0036] Although the terms first, second, third, etc. can be used in the text to describe multiple 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 only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0037] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0038] Figure 1 The schematic diagram of the structure of the plane grinding and cutting device according to the embodiment of the present invention is schematically shown. Figure 2 The exploded view of the plane grinding and cutting device according to the embodiment of the present invention is schematically shown. Figure 1 and Figure 2As shown, the present invention proposes a plane grinding and cutting device, including a grinding and cutting tool head 100, a fixed protective cover 210, a movable protective cover 220 and an elastic member 230; the grinding and cutting tool head 100 is used for grinding or cutting a workpiece; the fixed protective cover 210 is arranged on the grinding and cutting tool head 100; the movable protective cover 220 is connected to the fixed protective cover 210 and can move along the axial direction of the fixed protective cover 210, and the bottom of the movable protective cover 220 forms a supporting surface, which is used to contact the surface of the workpiece; one end of the elastic member 230 is connected to the fixed protective cover 210, and the other end of the elastic member 230 is connected to the movable protective cover 220, and the elastic member 230 is configured so that when the supporting surface is close to the grinding and cutting tool head 100, the elastic member 230 contracts.

[0039] When the plane grinding and cutting device in the present technical solution is used, the protruding part on the workpiece is ground by rotating the grinding and cutting tool head 100, or the workpiece is cut by the grinding and cutting tool head 100; the grinding and cutting tool head 100 is covered by the fixed protective cover 210, which can prevent the dust or debris generated during the grinding process from flying, and on the other hand, 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 through the elastic member 230. During the grinding process, the support surface of the movable protective cover 220 is pressed against the surface of the workpiece, and the elastic member 230 is contracted by the 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 in the direction close to the grinding and cutting tool head 100 until the grinding and cutting tool head 100 contacts the position to be ground, thereby grinding. Since the operator needs to overcome the restoring force of the elastic member 230 to make the support surface close to the surface of the grinding and cutting tool head 100, the stability of the grinding and cutting tool head 100 and the workpiece when in contact is easy to control, and the workpiece is prevented from being uneven or over-grinded after grinding due to unstable operation of the operator. Similarly, during the cutting process, 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, which can ensure the flatness of the cutting. Compared with the situation where the verticality of the cutting is completely controlled by humans, the plane grinding and cutting device in the present technical solution can effectively improve the consistency of the workpiece. In summary, since the grinding or cutting process is stable and controllable, it can be ensured that the surface of the workpiece is trimmed to be smooth and bright. In addition, since the operator can easily and stably control the grinding or cutting process, it is not easy for the grinding and cutting tool head 100 to get stuck, thereby reducing the probability of production failures and reducing personal injuries caused by improper use of the device.

[0040] Optionally, the grinding and cutting tool head 100 can be disc-shaped or cylindrical, and its diameter can be 10mm to 300mm. For example, the diameter of the grinding and cutting tool head 100 can be 10mm, 50mm, 200mm, 250mm or 300mm, etc. For example, the grinding and cutting tool head 100 can be a metal milling cutter, or a saw blade or a wire brush, etc. Depending on the type of the grinding and cutting tool head 100, the plane grinding and cutting device can be used for workpiece cutting or grinding. 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 grinding or cutting is affected by the technical level of the operator. Therefore, whether the workpiece is ground or cut, it can be ensured that the surface of the workpiece is trimmed smooth and clean.

[0041] Optionally, the workpiece may be fiberglass or sheet metal that needs to be polished or cut.

[0042] Further, Figure 3 The partial structural diagram of the plane grinding and cutting device according to the embodiment of the present invention is schematically shown. Figure 2 and Figure 3 The plane grinding and cutting device also includes a shell, and a driving assembly and a transmission assembly are arranged inside the shell. The transmission assembly and the driving assembly are transmission-connected, and the grinding and cutting tool head 100 and the transmission assembly are transmission-connected. The driving assembly is used to drive the transmission assembly to rotate, and the transmission assembly is used to drive the grinding and cutting tool head 100 to rotate.

[0043] Optionally, the drive assembly includes a drive member 510 and a driving wheel 520, the fixed end of the drive member 510 is fixedly connected to the housing, the driving wheel 520 is fixedly connected to the output end of the drive member 510, and the drive member 510 is used to drive the driving wheel 520 to rotate. Optionally, the drive member 510 can be a motor. Optionally, the transmission assembly can be a speed reduction mechanism. The grinding and cutting tool head 100 is ensured to rotate smoothly by setting the transmission assembly. Of course, in some embodiments, the transmission assembly may not be set, and the grinding and cutting tool head 100 is directly connected to the drive assembly by transmission. Optionally, the transmission assembly includes a transmission shaft 410 and a driven wheel 420, and the driven wheel 420 is connected to the driving wheel 520 by transmission. Optionally, the driving wheel 520 and the driven wheel 420 are gears, and the driving wheel 520 and the driven wheel 420 are meshed for transmission. The driven wheel 420 is fixedly connected to the top of the transmission shaft 410, and the grinding and cutting tool head 100 is fixedly connected to the bottom 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 grinding and cutting tool head 100 to rotate, thereby grinding or cutting the workpiece. Optionally, the bottom of the transmission shaft 410 is sleeved with a first fixed disk 440 and a second fixed disk 450, and the grinding and cutting tool head 100 is clamped between the first fixed disk 440 and the second fixed disk 450.

[0044] Optionally, a rolling bearing 430 is sleeved on the transmission shaft 410. The rolling bearing 430 includes a bearing inner ring, a bearing outer ring and a rolling body. The rolling body is arranged between the bearing inner ring and the bearing outer ring. The bearing inner ring is fixedly connected to the transmission shaft 410, and the bearing outer ring is fixedly connected to the housing. When the transmission shaft 410 rotates, the bearing inner ring drives the transmission, and the bearing inner ring drives the rolling body to rotate. The rolling body and the bearing outer ring are in rolling contact. By arranging the rolling bearing 430, the transmission can be made more stable.

[0045] Optionally, the housing includes a first housing 330, a second housing 340 and a third housing 350. The first housing 330 is disposed above the transmission assembly, the driving member 510 is disposed inside the second housing 340, and the inside of the third housing 350 is used to set a battery. The battery is disposed on one side of the driving member 510 and is electrically connected to the driving member 510 to provide power to the driving member 510. Optionally, the battery can be a primary battery, and the operator can replace the battery after the battery power is exhausted. The battery can also be a secondary battery, and the battery can be charged after the power is exhausted. Of course, the plane grinding and cutting device can also be directly connected to an AC power supply. Optionally, a switch button 360 is provided on the housing, and when the switch button 360 is pressed, the power is turned on, and grinding or cutting work can be performed. After the operation is completed, the switch button 360 is pressed in time to disconnect the power supply to prevent the grinding and cutting tool head 100 from rotating due to accidental touch, thereby avoiding injury to personnel. Optionally, the second housing 340 is configured as a structure that is convenient for the operator to hold, so as to ensure that the operator can comfortably hold the grinding and cutting device. Optionally, a protective ridge or anti-skid pad is provided on the second housing 340 to prevent the grinding and cutting device from slipping out of the operator's hand.

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

[0047] Further, Figure 4 The structure diagram of the fixed protective cover 210 according to the embodiment of the present invention is schematically shown. Figures 2 to 4, a clamp 213 is provided on the top of the fixed protective cover 210, and the shell also includes a connecting seat 320, and the clamp 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 outer ring of the bearing and the inner wall of the connecting seat 320 are fixedly connected. Optionally, the connecting seat 320 includes a first connecting ring 322, a connecting ridge 323 and a second connecting ring 324 connected in sequence. The first connecting ring 322 is connected to the first shell 330. Optionally, an external thread is provided on the outer side of the first connecting ring 322, and an internal thread is provided on the inner side of the bottom of the first shell 330, so that the first connecting ring 322 and the first shell 330 are threadedly connected by external threads and internal threads. Preferably, the connecting ridge 323 is connected to the first shell 330 by bolts. Specifically, the connecting rib 323 is provided with a through hole for passing a bolt, and correspondingly, the bottom of the first housing 330 is provided with a threaded hole. When the connecting seat 320 and the first housing 330 are assembled, a bolt is passed through the through hole on the connecting rib 323, and the bolt is threadedly connected to the threaded hole on the first housing 330. The second connecting ring 324 is used to connect with the hoop 213.

[0048] Optionally, the hoop 213 includes 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 that can cover the second connecting ring 324. Optionally, one end of the elastic member 230 is connected to the fixed ring 2132, and the bottom is suspended, so that the elastic member 230 has a certain adjustment space. Further, the end of the fixed ring 2132 that is not connected to the elastic ring 2133 is provided with a first extension portion 2134, and the end of the elastic ring 2133 that is not connected to the fixed ring 2132 is provided with a second extension portion 2135, the first extension portion 2134 and the second extension portion 2135 are arranged opposite to each other, and the first extension portion 2134 and the second extension portion 2135 are respectively provided with through holes, and the through holes are used to penetrate the locking pin 214. In one embodiment, the locking pin 214 may be a locking bolt. When locking, the locking bolt is passed through the first extension 2134 and the second extension 2135 in sequence, and a nut is sleeved on the locking bolt. The nut is tightened to tightly sleeve the clamp 213 on the connection seat 320. In another embodiment, the locking pin 214 includes 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 a 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 the locking wrench 215 will abut against the second extension 2135, so that the clamp 213 tightly holds the connection seat 320. Optionally, an arc portion is provided at the connection between the locking wrench 215 and the connecting portion. In the clockwise direction, the distance from the outer periphery of the arc portion to the rotation center of the arc portion gradually increases, so that when the locking wrench 215 is rotated clockwise, the arc portion can gradually push the second extension portion 2135 closer to the first extension portion 2134, and at the same time, the locking wrench 215 will be buckled on the elastic ring 2133, and then the clamp 213 will clamp the second connecting ring 324. Optionally, a gasket is provided between the arc portion and the first extension portion 2134, and the gasket can make the first extension portion 2134 evenly stressed to prevent the first extension portion 2134 from being worn or broken.

[0049] Further, see Figures 2 to 4, the inner wall of the clamp 213 is provided with a positioning protrusion 2131, the outer periphery of the second connecting ring 324 is provided with a positioning groove 321, and the positioning protrusion 2131 is arranged inside the positioning groove 321. In the present embodiment, the positioning protrusion 2131 is a rectangular parallelepiped protrusion, the number of the positioning protrusions 2131 is multiple, and the multiple positioning protrusions 2131 are arranged at intervals. In other embodiments, the positioning protrusion 2131 may also be a columnar protrusion or an annular protrusion arranged along the circumference of the inner wall of the clamp 213. The number of the positioning protrusions 2131 may be one or more. In the present embodiment, the positioning groove 321 is an annular groove arranged on the outer side of the second connecting ring 324. In other embodiments, the shape and number of the positioning grooves 321 may be set 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 protrusion 2131 and the positioning groove 321, the connection seat 320 and the clamp 213 can be firmly connected, and the connection seat 320 can be effectively prevented from falling off from the clamp 213. Optionally, the positioning protrusion 2131 can be set on the fixed ring 2132 or on the elastic ring 2133. Of course, the positioning protrusion 2131 can also be set on both the fixed ring 2132 and the elastic ring 2133. In other embodiments, the positioning protrusion 2131 can also be set on the outer periphery of the second connection ring 324, and the positioning groove 321 can be set on the inner wall of the clamp 213.

[0050] See also Figure 3 and Figure 4 The fixed protective cover 210 includes 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 sleeved on the outer side of the guide sleeve 212. The top plate 211 is provided with an escape opening for allowing the transmission assembly to pass through. The clamp 213 is connected to the edge of the escape opening. The top plate 211 is roughly a circular plate-shaped structure. The escape opening is a circular opening. The transmission shaft 410 passes through the escape opening and is connected to the grinding and cutting tool head 100. The clamp 213 is connected to the edge of the through hole, wherein the bottom of the fixed ring 2132 is fixedly connected to the top plate 211, and the bottom of the elastic ring 2133 is not connected to the top plate 211, but there is a certain gap, so as to ensure that the elastic ring 2133 has a certain range of movement. It can be understood that the guide sleeve 212 , the movable protective cover 220 and the grinding and cutting tool head 100 are concentrically arranged, and the guide sleeve 212 can guide the movable protective cover 220 to ensure that the movable protective cover 220 moves smoothly along the axial direction of the grinding and cutting tool head 100 .

[0051] Further, Figure 5 The structure diagram of the movable protective cover 220 according to the embodiment of the present invention is schematically shown. Figures 3 to 5The movable protective cover 220 includes 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 circumferentially arranged along the bottom of the connecting sleeve 221, and the bottom of the extension plate 222 forms a supporting surface. Optionally, the connecting sleeve 221 is an annular sleeve structure. The height of the connecting sleeve 221 is set according to the needs of use. 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 to prevent the top of the connecting sleeve 221 from escaping from the bottom of the fixed protective cover 210, thereby avoiding misalignment between the movable protective cover 220 and the fixed protective cover 210. The extension plate 222 is an annular plate structure, and the extension plate 222 is arranged perpendicular 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 thereof extends in a direction away from the center line of the connecting sleeve 221. It can be understood that by setting the extension plate 222, the contact area between the movable protective cover 220 and the surface of the workpiece can be increased, thereby increasing the stability of the movable protective cover 220 when in contact with the workpiece, and helping to achieve a smooth and clean surface of the workpiece. In one embodiment, the extension plate 222 may not be provided, and the bottom end of the connecting sleeve 221 is directly in contact with the workpiece during grinding or cutting. In another embodiment, the outer edge of the extension plate 222 may be connected to the bottom end of the connecting sleeve 221, so that the inner edge of the extension plate 222 extends in a direction close to the center line of the connecting sleeve 221. Of course, the connecting sleeve 221 may 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 requirements, which requires that the movable protective cover 220 can be stably supported on the workpiece surface and can avoid interference with the grinding and cutting tool head 100. Optionally, the connecting sleeve 221 and the extension plate 222 can be an integrally formed structure.

[0052] Furthermore, a connecting piece 240 is provided on the fixed protective cover 210, and a guide hole is provided on the connecting piece 240. A guide piece 250 is movably penetrated inside the guide hole. The bottom of the guide piece 250 is connected to the extension plate 222. The guide piece 250 can move axially inside the guide hole along the fixed protective cover 210. 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 connector 240 is fixedly connected to the top plate 211, and the connection between the connector 240 and the top plate 211 can be connected by a threaded connector, bonding or welding, etc. Optionally, the number of connectors 240 can be multiple, and multiple connectors 240 are arranged at intervals along the circumference of the fixed protective cover 210. Exemplarily, the number of connectors 240 is three, and the intervals between each two adjacent connectors 240 are equal. It can be understood that each connector 240 is penetrated by a guide member 250, and each guide member 250 is sleeved with an elastic member 230. By providing multiple elastic members 230, it can be ensured that the force of the movable protective cover 220 is balanced, thereby ensuring that the movable protective cover 220 can be stably moved and easy to control during use. Optionally, the guide member 250 can be a rod-shaped structure with a circular cross-section, and the guide hole is a circular hole. Preferably, an anti-slip portion is provided on the top of the guide member 250. When the operator releases the auxiliary handle 310, the elastic member 230 will rebound by its own restoring force. During the rebound of the elastic member 230, the guide member 250 moves downward relative to the guide hole. The anti-slip portion can be provided to prevent the guide member 250 from moving out of the guide hole, thereby preventing the movable protective cover 220 from being unable to move upward due to the guide member 250 not being able to align with the guide hole. In other embodiments, the length of the guide member 250 can also be set to be greater than the initial state of the elastic member 230 when it is not compressed, thereby preventing the guide member 250 from withdrawing from the guide hole. Optionally, the elastic member 230 can be a compression spring. By sleeved the elastic member 230 on the guide member 250, it is possible to prevent the elastic member 230 from tilting during the compression and automatic rebound process. For further information, see Figure 5 The extension plate 222 is provided with a connecting column 224 for connecting the guide member 250. In one embodiment, the guide member 250 is a bolt, and a threaded hole is provided on the connecting column 224, and the guide member 250 and the connecting column 224 are threadedly connected. With this structure, the assembly between the components can be facilitated and the assembly process can be simplified.

[0054] Continue to see Figure 3 The connecting member 240 is provided with an adjusting bolt 260, which is threadedly connected to the connecting member 240, and the bottom of the adjusting bolt 260 is used to abut 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 member 240 can be adjusted. When the supporting surface of the movable protective cover 220 approaches the grinding and cutting tool head 100, the adjusting bolt 260 can limit the moving distance of the movable protective cover 220, thereby limiting the grinding or cutting depth to avoid over-grinding or over-cutting.

[0055] See also Figures 3 to 5The fixed protective cover 210 is provided with a first observation port 216, and 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. The first observation port 216 and the second observation port 223 are used to observe the grinding and cutting tool head 100. Through the first observation port 216 and the second observation port 223, the rotation of the grinding and cutting tool head 100 can be seen to determine whether the grinding and cutting tool head 100 is operating normally.

[0056] The use process of the grinding and cutting device provided by this technical solution is as follows:

[0057] By screwing the adjusting bolt 260, the length of the bottom of the adjusting bolt 260 extending out of the connection is adjusted, thereby determining the maximum distance that the movable protective cover 220 moves relative to the fixed protective cover 210 to avoid excessive grinding or cutting. Press the switch button 360 to turn on the power. Align the grinding and cutting tool head 100 with the position where the workpiece needs to be ground or cut, hold the auxiliary handle 310 with one hand and press it downward, so that the support surface of the movable protective cover 220 is pressed on the surface of the workpiece. At this time, the elastic member 230 contracts, and the support surface gradually approaches the grinding and cutting tool head 100 until the grinding and cutting tool head 100 contacts the workpiece. At the same time, start the drive assembly, the drive assembly drives the transmission assembly to rotate, and the transmission assembly drives the grinding and cutting tool head 100 to rotate, so as to perform grinding or cutting. During the grinding or cutting process, due to the restoring force of the elastic member 230, the support surface can be stably attached to the surface of the workpiece, so that the operation process is smooth and the flatness of the workpiece is easy to control. After the grinding or cutting is completed, release the auxiliary handle 310, the elastic member 230 rebounds, and drives the movable protective cover 220 to reset. After the operation is completed, the switch button 360 is pressed to cut off the power supply.

[0058] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A plane grinding and cutting device, characterized in that: include: A grinding and cutting tool head (100) for grinding or cutting a workpiece; A fixed protective cover (210), wherein the fixed protective cover (210) is disposed on the grinding and cutting tool head (100); A movable protective cover (220), the movable protective cover (220) being connected to the fixed protective cover (210) and being movable along the axial direction of the fixed protective cover (210), the bottom of the movable protective cover (220) forming a supporting surface, the supporting surface being used to contact the surface of the workpiece; An elastic member (230), one end of the elastic member (230) is connected to the fixed protective cover (210), and the other end of the elastic member (230) is connected to the movable protective cover (220), and the elastic member (230) is configured so that when the support surface approaches the grinding and cutting tool head (100), the elastic member (230) contracts.

2. The plane grinding and cutting device according to claim 1, characterized in that: The 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 is movable along the axial direction of the fixed protective cover (210); the extension plate (222) is circumferentially arranged along the bottom of the connecting sleeve (221); and the bottom of the extension plate (222) forms the supporting surface.

3. The plane grinding and cutting device according to claim 2, characterized in that: The fixed protective cover (210) is provided with a connecting piece (240), and a guide hole is provided on the connecting piece (240). A guide piece (250) is movably inserted into the guide hole. The bottom of the guide piece (250) is connected to the extension plate (222). The guide piece (250) can move in the axial direction of the fixed protective cover (210) inside the guide hole. The elastic piece (230) is sleeved on the guide piece (250), and 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).

4. The plane grinding and cutting device according to claim 3, characterized in that: An adjusting bolt (260) is passed through the connecting piece (240), the adjusting bolt (260) and the connecting piece (240) are threadedly connected, and the bottom of the adjusting bolt (260) is used to abut against the top of the connecting sleeve (221).

5. The plane grinding and cutting device according to any one of claims 1 to 4, characterized in that: The plane grinding and cutting device also includes a shell, wherein a driving assembly and a transmission assembly are arranged inside the shell, wherein the transmission assembly is in driving connection with the driving assembly, wherein the grinding and cutting tool head (100) is in driving connection with the transmission assembly, wherein the driving assembly is used to drive the transmission assembly to rotate, and wherein the transmission assembly is used to drive the grinding and cutting tool head (100) to rotate.

6. The plane grinding and cutting device according to claim 5, characterized in that: An auxiliary handle (310) is provided on the housing.

7. The surface grinding and cutting device according to claim 5, characterized in that: A clamp (213) is provided on the top of the fixed protective cover (210), the shell comprises a connecting seat (320), and the clamp (213) is sleeved on the connecting seat (320).

8. The plane grinding and cutting device according to claim 7, characterized in that: The inner wall of the clamp (213) is provided with a positioning protrusion (2131), the outer periphery of the connecting seat (320) is provided with a positioning groove (321), and the positioning protrusion (2131) is arranged inside the positioning groove (321).

9. The plane grinding and cutting device according to claim 7, characterized in that: The fixed protective cover (210) comprises a top plate (211) and a guide sleeve (212), wherein the guide sleeve (212) is arranged along the outer circumference of the top plate (211), and the movable protective cover (220) is sleeved on the outer side of the guide sleeve (212). The top plate (211) is provided with an escape opening for allowing the transmission assembly to pass through, and the clamp (213) is connected to the edge of the escape opening.

10. The plane grinding and cutting device according to any one of claims 1 to 4, characterized in that: The fixed protective cover (210) is provided with a first observation port (216), and 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 each other, and the first observation port (216) and the second observation port (223) are used to observe the grinding and cutting tool head (100).

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