grinder

Abstract

This utility model discloses a grinding machine, comprising: a support base; a sanding belt wound in a V-shape onto two sanding rollers and a sanding pad; and a sanding belt tensioning device, the tensioning device comprising: a tensioning mechanism pressing against the outer surface of the sanding belt between the sanding pad and the sanding rollers, including: a tensioning drive component rotatably mounted on the support base, including a moving part; a connecting assembly rotatably connected to the moving part; and a tensioning roller group, which is eccentrically mounted on the support base and connected to the connecting assembly; wherein, when the tensioning drive component drives the moving part to move, it drives the connecting assembly to rotate, which in turn drives the tensioning roller group connected to it to rotate and change position, pressing the sanding belt to move towards the symmetry line of the two sanding rollers to tension the sanding belt. The grinding machine proposed by this utility model can achieve rapid tension adjustment of a V-shaped sanding belt.

Description

Technical Field

[0001] This utility model belongs to the field of sheet metal processing technology, specifically, it relates to an improvement in the structure of a grinding machine with a sanding belt tensioning device. Background Technology

[0002] Existing sanding and grinding equipment for boards mainly consists of a drive roller and a driven roller. The abrasive belt is wound around the drive roller and the driven roller and moves in a loop under the drive of the drive roller and the driven roller. The drive roller and the driven roller work together to rotate and pass the abrasive belt to perform the grinding operation on the workpiece.

[0003] If the sanding belt becomes loose during operation, it needs to be tightened. The main way to tighten the sanding belt is to set the drive roller as an eccentric roller and drive the drive roller through the drive mechanism to tighten the sanding belt wrapped between the drive roller and the driven roller.

[0004] With continuous development, grinding equipment has emerged with grinding machines in which the sanding belt is arranged in a V-shape on the sanding roller and sanding pad. The above-mentioned method of setting the drive roller in an eccentric structure is no longer suitable for existing grinding machines.

[0005] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0006] This invention addresses the technical problem that the existing belt tensioning structure for grinding machines is not applicable to V-belt grinding machines, and proposes a novel belt tensioning device.

[0007] To achieve the above-mentioned utility model / design objectives, the present utility model adopts the following technical solution:

[0008] A grinding machine, comprising:

[0009] Supporting substrate;

[0010] The sanding belt is wound in a V-shape onto two sanding rollers and a sanding pad;

[0011] It includes a belt tensioning device, which comprises:

[0012] The tensioning mechanism, pressing against the outer surface of the sanding belt between the sanding pad and the sanding belt roller, includes:

[0013] The tensioning drive component, assembled onto the support base, includes a movable part;

[0014] The connecting component is rotatably connected to the moving part;

[0015] The tensioning roller assembly, which is eccentric, is rotatably mounted on the support base and connected to the connecting assembly;

[0016] When the tensioning drive unit moves the moving part, it drives the connecting component to rotate. The connecting component drives the tensioning roller group connected to it to rotate and change its position, pressing the sanding belt to move towards the direction of the symmetry line of the two sanding belt rollers to tension the sanding belt.

[0017] In some embodiments of this application, the support base includes a first base frame and a second base frame, which are symmetrically arranged at both ends of the sanding belt roller;

[0018] The tensioning roller assembly includes: an outer tensioning roller;

[0019] The tensioning inner roller is eccentric and is arranged inside the tensioning outer roller and rotatably connected to the tensioning outer roller. Both ends of the tensioning inner roller extend out of the tensioning outer roller. One end extends through the first base frame corresponding to the position of the connecting component and is connected to the connecting component. The other end is rotatably connected to the second base frame.

[0020] In some embodiments of this application, the moving part is rotatably connected to the connecting assembly via a rotating connector.

[0021] In some embodiments of this application, the connection component includes:

[0022] A connector having a first connecting portion and a second connecting portion;

[0023] A connecting shaft is connected to the rotating connector and the first connecting part;

[0024] The tensioning inner roller is connected to the second connecting part.

[0025] In some embodiments of this application, the tensioning inner roller includes:

[0026] The main section of the inner roller;

[0027] A first connecting section connected to one end of the inner roller main body section extends at least partially through the first base frame. The outer diameter of the first connecting section is smaller than the minimum outer diameter of the inner roller main body section, and a locking step is formed between the first connecting section and the inner roller main body section.

[0028] The second connecting segment is connected to the first connecting segment, and its outer diameter is smaller than that of the first connecting segment, and it extends out of the support base;

[0029] The connector is sleeved onto the first connecting segment via the second connecting part;

[0030] The first connecting sleeve is fitted onto the first connecting segment, with its two ends abutting against the locking step and the connecting member, respectively.

[0031] The pressure roller cover is pressed and fixed to the ends of the connector and the first connecting section.

[0032] In some embodiments of this application, a clamping member is further included, which passes through the pressure roller cover and is screwed into the threaded hole of the first connecting section, and a gasket assembly is provided between the clamping member and the pressure roller cover.

[0033] In some embodiments of this application, the second connecting sleeve includes a second set of protrusions;

[0034] The first connecting sleeve includes a first set of protrusions;

[0035] A first mounting hole is provided on the first base frame, and the first connecting sleeve passes through the first mounting hole and abuts against the side of the first base frame away from the tensioning outer roller through the protrusion of the first sleeve.

[0036] The tensioning inner roller includes a second connecting section, the outer diameter of which is smaller than the minimum outer diameter of the inner roller main body section;

[0037] The second base frame is provided with a second mounting hole, and a second connecting sleeve is fitted on the second connecting section. The second connecting sleeve passes through the second mounting hole and abuts against the side of the second base frame away from the tensioning outer roller through the second sleeve protrusion.

[0038] In some embodiments of this application, the sanding belt includes a tensioning section located between the sanding pad and the sanding belt roller. Two tensioning sections are formed on the sanding belt between the two sanding belt rollers and the sanding pad. The two tensioning sections are arranged opposite to each other. Each tensioning section is provided with the tensioning mechanism. The two tensioning mechanisms are arranged opposite to each other.

[0039] In some embodiments of this application, two sanding belt rollers are provided and symmetrically arranged on the support base;

[0040] The sanding belt has one end wound onto one of the sanding belt rollers and the other end wound onto the other sanding belt roller;

[0041] The sanding pad is pressed onto the sanding belt section located between the two sanding rollers;

[0042] The belt abrasive drive unit includes:

[0043] The first drive unit is connected to one of the sanding belt rollers and drives the sanding belt roller to perform winding or unwinding movements.

[0044] The second drive unit is connected to another sanding belt roller and drives that roller to perform unwinding or winding. During unwinding and winding, the two sanding belt rollers rotate at the same speed, have the same outer diameter, and rotate in the same direction to ensure synchronous winding and unwinding operations, thus keeping the sanding belt between the two rollers taut.

[0045] Compared with the prior art, the advantages and positive effects of this utility model are:

[0046] In this embodiment, when the moving part is extended or retracted by setting a tensioning drive connected to the support base, the moving part will drive the connecting component rotatably connected to it to rotate, which in turn drives the eccentric tensioning roller group to rotate. The tensioning roller group is eccentric, and when it rotates, it will change the contact position with the sanding belt. When the eccentric section of the tensioning roller group contacts the sanding belt, it will squeeze the sanding belt and make it move towards the middle position of the two sanding belt rollers, that is, towards the direction of the symmetry line of the two sanding belt rollers, so as to tighten the sanding belt, thereby realizing the rapid tension adjustment of the V-shaped sanding belt.

[0047] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a three-dimensional structural diagram of one embodiment of the grinding machine proposed in this utility model;

[0050] Figure 2 for Figure 1 Enlarged view of a portion at point A;

[0051] Figure 3 This invention relates to an embodiment of a grinding machine and its structure in conjunction with the abrasive belt roller and tension roller assembly. Figure 1 ;

[0052] Figure 4 This invention relates to an embodiment of a grinding machine and its structure in conjunction with the abrasive belt roller and tension roller assembly. Figure 2 ;

[0053] Figure 5 This is a structural diagram of the eccentric grinding mechanism of one embodiment of the grinding machine proposed in this utility model;

[0054] Figure 6 This is a structural diagram showing the cooperation between the first base frame, the second base frame, and the tensioning roller assembly in one embodiment of the grinding machine proposed in this utility model;

[0055] Figure 7 for Figure 5 BB-direction sectional view;

[0056] Figure 8 for Figure 6 A magnified view of a portion at point C;

[0057] Figure 9 for Figure 6 A magnified view of a portion of point D.

[0058] In the figure, 110 is the first base frame; 120 is the second base frame; 200 is the sanding belt roller; 300 is the sanding belt; 310 is the tensioning section; 410 is the tensioning drive component; 411 is the moving part; 420 is the outer tensioning roller; 430 is the inner tensioning roller; 431 is the main body section of the inner roller; 432 is the first connecting section; 433 is the locking step; 434 is the second connecting section; 440 is the connecting component; 441 is the first connecting part; 442 is the second connecting part; 4 50. Connecting shaft; 500. Rotating connecting part; 610. First connecting sleeve; 611. First set of protrusions; 620. Second connecting sleeve; 621. Second set of protrusions; 710. Pressure roller cover; 720. Pressing part; 810. First driving device; 820. Second driving device; 911. Drive motor; 912. Reducer; 913. Synchronous connecting shaft; 920. Rotating component; 930. Connecting sleeve; 940. Fixing plate. Detailed Implementation

[0059] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0060] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0062] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0063] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0064] In some embodiments of this application, a grinding machine is proposed, comprising:

[0065] Support base and abrasive belt roller 200 assembled onto the support base.

[0066] Two sanding belt rollers 200 are provided and symmetrically arranged on the support base. The axes of the two sanding belt rollers 200 are parallel to each other and are in the same horizontal plane.

[0067] The sanding belt 300 is wound at one end onto one of the sanding belt rollers 200 and at the other end onto another sanding belt roller 200.

[0068] A portion of the sanding belt 300 is wound onto one of the sanding belt rollers 200, and another portion is wound onto the other sanding belt roller 200.

[0069] When selecting, the abrasive belt 300 can be a longer abrasive belt roll, which is partially stored by being wound onto two abrasive belt rollers 200 respectively, thereby increasing the length of the abrasive belt 300 used for grinding.

[0070] The sanding belt 300 also includes a portion that is not wound onto the two sanding belt rollers 200, which is spread out between the two sanding belt rollers 200.

[0071] The sanding pad is pressed onto the sanding belt section between the two sanding belt rollers 200.

[0072] The sanding pad is used to press down the portion of the sanding belt 300 that is not wrapped around the two sanding rollers 200. Under the pressure of the sanding pad, this portion of the sanding belt 300 is pressed down to a position close to the plate on the conveyor bed, so that the sanding belt 300 can contact the plate and grind the plate.

[0073] In some embodiments of this application, the grinding machine further includes a grinding device connected to the sanding pad for driving the sanding pad to move. The grinding device includes two eccentric grinding mechanisms arranged side by side.

[0074] Each eccentric grinding mechanism includes: a rotating component 920 having an eccentric portion;

[0075] A drive mechanism is connected to the rotating component 920 and drives the rotating component 920 to rotate;

[0076] The eccentric parts of both eccentric grinding mechanisms are connected to the sanding pad, and the sanding pad is connected to the supporting substrate.

[0077] When the sanding belt 300 grinding device is working, the two eccentric grinding mechanisms move synchronously, driving the sanding pad connected to it, the support base, the sanding belt roller 200 connected to the support base, and the sanding belt 300 to perform circumferential translation to grind the board.

[0078] The drive mechanism includes a drive motor 911 and two reducers 912. The two reducers 912 of the two eccentric grinding mechanisms are connected by a synchronous connecting shaft 913. The two reducers are respectively connected to the corresponding rotating parts. One of the reducers is connected to the drive motor 911 to ensure that the two move synchronously.

[0079] The rotating component 920 includes a rotating main body and an eccentric part, with the axis of the rotating main body and the axis of the eccentric part offset by a certain distance.

[0080] The rotating main body is the rotating main body segment, and the eccentric part is the eccentric shaft segment.

[0081] During connection, the rotating main body section and the reducer 912 are connected, and a connecting sleeve 930 is sleeved on the outer side of the eccentric part. The eccentric part and the connecting sleeve 930 are connected by a bearing, and a fixing plate 940 is fixedly connected to the bottom of the connecting sleeve 930.

[0082] The fixing plate 940, the sanding pad, and the support base are fixed together by screws.

[0083] In some embodiments of this application, a first driving device 810 and a second driving device 820 are provided on the support base, which are respectively connected to two sanding belt rollers 200 and drive the two sanding belt rollers 200 to perform actions.

[0084] During operation, the first drive device 810 drives the sanding belt roller 200 connected to it to perform a winding motion, and the second drive device 820 drives the sanding belt roller 200 connected to it to perform an unwinding motion, so as to achieve the effect of automatic winding and unwinding of the two sanding belt rollers 200.

[0085] During the grinding process, the sanding belt 300 located between the sanding pad and the sanding roller 200 may become loose. In order to avoid the sanding belt 300 becoming loose and affecting the grinding effect, a tensioning mechanism is set at the position of the sanding belt 300 between the sanding pad and the sanding roller to press the sanding belt 300 and achieve tensioning of the sanding belt 300.

[0086] The sanding belt 300 located between the sanding pad and the sanding roller 200 forms a tension section 310. Two tension sections 310 are formed on the sanding belt 300 between the two sanding rollers and the sanding pad, and the two tension sections 310 are arranged opposite to each other.

[0087] The institutions that tighten monetary policy include:

[0088] The tensioning drive component 410 is assembled onto the support base and includes a movable part 411.

[0089] The tensioning drive component 410 is a tensioning drive cylinder, which includes a cylinder seat, a fixed plate on the support base, an insertion hole on the fixed plate, a shaft hole on the cylinder seat, and a connecting shaft 450 with one end interference-fitted into the insertion hole and the other end interference-fitted into the cylinder seat to achieve support and fixation of the cylinder seat.

[0090] The moving part 411 is the cylinder rod of the tension drive cylinder, which can perform telescopic movement.

[0091] A connecting component is rotatably connected to the moving part 411;

[0092] The tensioning roller assembly, which is eccentric, is connected to the connecting component;

[0093] When the tensioning drive 410 moving part 411 is activated, it drives the connecting assembly to rotate. The connecting assembly drives the tensioning roller group connected to it to rotate and change its position, pressing the sanding belt 300 to move in the direction of the symmetrical line close to the middle position of the two sanding belt rollers 200 to tension the sanding belt 300.

[0094] When the cylinder rod of the tensioning drive cylinder extends or retracts, it drives the connecting assembly connected to it to rotate, which in turn drives the eccentric tensioning roller group to rotate. The tensioning roller group is eccentric, and when it rotates, it changes the contact position with the sanding belt 300. When the eccentric section of the tensioning roller group contacts the sanding belt 300, it will squeeze the sanding belt 300 and move it towards the middle position of the two sanding belt rollers 200, that is, towards the direction of the symmetrical line of the two sanding belt rollers 200, so as to tighten the sanding belt 300.

[0095] In this embodiment, the tensioning drive 410 connected to the support base drives the rotation of the connecting assembly and the eccentric tensioning roller group to achieve rapid tensioning adjustment of the V-shaped sand belt 300.

[0096] In some embodiments of this application, the tensioning mechanism is provided on each tensioning segment 310, and the two tensioning mechanisms are positioned opposite each other.

[0097] When the abrasive belt 300 is tightened, two tightening mechanisms that abut against the two tightening sections 310 can be operated simultaneously to tighten both sides of the abrasive belt 300 evenly, ensuring that the abrasive belt 300 will not shift.

[0098] In some embodiments of this application, the support base includes a first base frame 110 and a second base frame 120, which are symmetrically arranged at both ends of the sanding belt roller 200.

[0099] The tensioning roller assembly includes: a tensioning outer roller 420;

[0100] The inner tensioning roller 430, which is eccentric, is arranged inside the outer tensioning roller 420 and rotatably connected to the outer tensioning roller 420. The inner tensioning roller 430 and the outer tensioning roller 420 can be rotatably connected by bearings.

[0101] When the inner tensioning roller 430 rotates, it can drive the outer tensioning roller 420 connected to it to rotate.

[0102] To avoid wear on the sanding belt 300, the tensioning outer roller 420 can be made of rubber.

[0103] The tensioning inner roller 430 extends directly out of the first base frame 110 and connects to the connecting assembly, so that the tensioning drive component 410 can directly drive the tensioning inner roller 430 to rotate when it extends or retracts.

[0104] In some embodiments of this application, the movable part 411 is rotatably connected to the connecting assembly via a rotating connector 500. Specifically, the rotating connector 500 is a spherical bearing, and the movable part 411 is provided with threads, which are screwed to one end of the spherical bearing, and the other end of the spherical bearing is connected to the connecting assembly.

[0105] In some embodiments of this application, the connection component includes:

[0106] The connector 440 has a first connecting portion 441 and a second connecting portion 442;

[0107] The connecting shaft 450 is connected to the rotating connector 500 and the first connecting part 441;

[0108] The tensioning inner roller 430 is connected to the second connecting part 442.

[0109] The first connecting part 441 is a first connecting hole formed on the connector 440. The connecting shaft 450 is inserted into the first connecting hole to be fixedly connected with the connector 440. The other end of the connecting shaft 450 is fixedly connected to the rotating connector 500.

[0110] The second connecting part 442 is a second connecting hole for inserting the tensioning inner roller 430.

[0111] In some embodiments of this application, the tensioning inner roller 430 includes:

[0112] The inner roller main body section 431 is partially built inside the tensioning outer roller 420 to be rotatably connected to the tensioning outer roller 420.

[0113] A first connecting section 432 connected to one end of the inner roller main body section 431 extends at least partially through the first base frame 110. The outer diameter of the first connecting section 432 is smaller than the minimum outer diameter of the inner roller main body section 431. A locking step 433 is formed between the first connecting section 432 and the inner roller main body section 431.

[0114] The connector 440 is fitted onto the first connecting segment 432 via the second connecting part 442;

[0115] The first connecting sleeve 610 is fitted onto the first connecting segment 432, with its two ends abutting against the locking step 433 and the connecting member 440, respectively.

[0116] The pressure roller cover 710 is pressed and fixed to the ends of the connector 440 and the first connecting section 432.

[0117] The connector 440 is fitted onto the first connecting section 432 via the second connecting part 442, thus connecting the connector 440 and the tensioning inner roller 430. The pressure roller cover 710 presses on the end faces of the connector 440 and the first connecting section 432 to press and fix the connector 440. It cooperates with the first connecting sleeve 610, which is locked in the locking step 433, to limit the two ends of the connector 440 and ensure that the connector 440 will not move axially relative to the tensioning inner roller 430.

[0118] In some embodiments of this application, a threaded hole is provided in the first connecting section 432, and the clamping member 720 is screwed into the threaded hole of the first connecting section 432 through the pressure roller cover 710. A gasket assembly is provided between the clamping member 720 and the pressure roller cover 710.

[0119] In some embodiments of this application, the first connecting sleeve 610 includes a first set of protrusions 611;

[0120] A first mounting hole is provided on the first base frame 110, and the first connecting sleeve 610 passes through the first mounting hole and abuts against the side of the first base frame 110 away from the tensioning outer roller 420 through the first sleeve protrusion 611.

[0121] The tensioning inner roller 430 includes a second connecting section 434, the outer diameter of which is smaller than the minimum outer diameter of the inner roller body section 431;

[0122] The second base frame 120 is provided with a second mounting hole, and the second connecting sleeve 620 is sleeved on the second connecting section 434. It passes through the second mounting hole and abuts against the side of the second base frame 120 away from the tensioning outer roller 420 through the second sleeve protrusion 621.

[0123] By using two connecting sleeves arranged on the tensioning inner roller 430 respectively, which pass through the first mounting hole and the second mounting hole respectively, the rotational connection between the tensioning inner roller 430 and the first base frame 110 and the second base frame 120 is realized.

[0124] The first set of protrusions 611 and the second set of protrusions 621 on the two connecting sleeves respectively abut against the outer sides of the first base frame 110 and the second base frame 120 to achieve axial limiting of the tensioning inner roller 430 and prevent it from moving axially during rotation.

[0125] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A grinding mill, comprising: Supporting substrate; Two sanding belt rollers are mounted on the support base, and The sanding belt is wound in a V-shape onto two sanding rollers and a sanding pad; characterized in that It includes a belt tensioning device, which comprises: The tensioning mechanism, pressing against the outer surface of the sanding belt between the sanding pad and the sanding belt roller, includes: The tensioning drive component, assembled onto the support base, includes a movable part; The connecting component is rotatably connected to the moving part; The tensioning roller assembly, which is eccentric, is rotatably mounted on the support base and connected to the connecting assembly; When the tensioning drive unit moves the moving part, it drives the connecting component to rotate. The connecting component drives the tensioning roller group connected to it to rotate and change its position, pressing the sanding belt to move to the middle position of the two sanding belt rollers to tension the sanding belt.

2. The grinder of claim 1, wherein, The supporting matrix includes: The first base frame and the second base frame are symmetrically arranged at both ends of the sanding belt roller; The tensioning roller assembly includes: an outer tensioning roller; The tensioning inner roller is eccentric and is arranged inside the tensioning outer roller and rotatably connected to the tensioning outer roller. Both ends of the tensioning inner roller extend from the tensioning outer roller. One end passes through the first base frame corresponding to the position of the connecting component and is connected to the connecting component. The other end is rotatably connected to the second base frame.

3. The grinder of claim 2, wherein, The moving part is rotatably connected to the connecting assembly via a rotating connector.

4. The grinder of claim 3, wherein, The connection component includes: A connector having a first connecting portion and a second connecting portion; A connecting shaft is connected to the rotating connector and the first connecting part; The tensioning inner roller is connected to the second connecting part.

5. The grinder of claim 2, wherein, The tensioning inner roller includes: The main section of the inner roller; A first connecting section connected to one end of the inner roller main body section extends at least partially through the first base frame. The outer diameter of the first connecting section is smaller than the minimum outer diameter of the inner roller main body section, and a locking step is formed between the first connecting section and the inner roller main body section. The second connecting section is connected to the first connecting section, and its outer diameter is smaller than that of the first connecting section, and it extends out from the first base frame; The connector is sleeved onto the first connecting segment via the second connecting part; The first connecting sleeve is fitted onto the first connecting segment, with its two ends abutting against the locking step and the connecting member, respectively. The pressure roller cover passes through the second connecting section and is pressed onto the connecting member.

6. The grinder of claim 5, wherein, It also includes: a clamping member, which passes through the pressure roller cover and is screwed into the threaded hole of the first connecting section, and a gasket assembly is provided between the clamping member and the pressure roller cover.

7. The grinder of claim 5, wherein, Including: The second connecting sleeve includes a second set of protrusions; The first connecting sleeve includes a first set of protrusions; A first mounting hole is provided on the first base frame, and the first connecting sleeve passes through the first mounting hole and abuts against the side of the first base frame away from the tensioning outer roller through the protrusion of the first sleeve. The tensioning inner roller includes a second connecting section, the outer diameter of which is smaller than the minimum outer diameter of the inner roller main body section; The second base frame is provided with a second mounting hole, and a second connecting sleeve is fitted on the second connecting section. The second connecting sleeve passes through the second mounting hole and abuts against the side of the second base frame away from the tensioning outer roller through the second sleeve protrusion.

8. The grinder of claim 1, wherein, The sanding belt located between the sanding pad and the sanding belt roller forms a tensioning section. Two tensioning sections are formed on the sanding belt between the two sanding belt rollers and the sanding pad. The two tensioning sections are arranged opposite to each other. Each tensioning section is provided with a tensioning mechanism. The two tensioning mechanisms are arranged opposite to each other.

9. The grinding machine according to claim 1, characterized in that, The two sanding belt rollers are symmetrically arranged on the support base; The sanding belt has one end wound onto one of the sanding belt rollers and the other end wound onto the other sanding belt roller; The sanding pad is pressed onto the sanding belt section located between the two sanding rollers; The belt abrasive drive unit includes: The first drive unit is connected to one of the sanding belt rollers and drives the sanding belt roller to perform winding or unwinding movements. The second drive unit is connected to another sanding belt roller drive, driving the other sanding belt roller to perform unwinding or rewinding movements.

Images