Efficient plane belt sander

Abstract

The plane efficient abrasive belt polishing machine comprises stand columns arranged at the two side ends of a base respectively, a top plate is erected on the tops of the two stand columns, a workpiece conveying mechanism used for conveying workpieces is arranged on the base, and polishing mechanisms used for polishing the workpieces are arranged in the two stand columns. According to the polishing mechanism, the distance between the two abrasive belt wheels and the tightness of the abrasive belt can be adjusted through the tensioning mechanism, replacement and maintenance of the abrasive belt are more convenient, faster and easier, the maintenance cost of the abrasive belt is reduced, meanwhile, the polishing mechanism is suitable for being provided with a wider abrasive belt, the polishing area of the abrasive belt on a workpiece each time is greatly widened, and the polishing efficiency is improved. The polishing device has the advantages of high polishing efficiency and good polishing effect. And the problems of low polishing efficiency and poor polishing effect caused by the phenomenon that one plate surface of a wide stainless steel plate and a wide aluminum plate can be polished only by polishing the stainless steel plate and the aluminum plate for multiple times in the traditional grinding machine, and one polishing missing area or overlapped polishing possibly occurs in two adjacent polishing processes are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of polishing machine especially relates to a plane high -efficient abrasive belt polishing machine. BACKGROUND

[0002] With the development of industrialization, the demand of stainless steel plate and aluminum plate is increasing, and the stainless steel plate and aluminum plate have broad market prospect, and the polishing quality and polishing efficiency of the stainless steel plate and aluminum plate also have higher requirements. The traditional polishing machine is used to polish the stainless steel plate and aluminum plate, the width of the grinding wheel is small, and the stainless steel plate and aluminum plate need to be polished for many times to complete the polishing of a plate surface, the polishing efficiency is low, and adjacent two polishing areas may have a polishing area or a phenomenon of overlapping polishing, resulting in uneven plate surface polishing and unsatisfactory polishing effect. SUMMARY

[0003] The utility model discloses a plane high -efficient abrasive belt polishing machine which overcomes the defects of the prior art.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: the plane high -efficient abrasive belt polishing machine includes the base, and the base two sides end is equipped with the stand respectively, and the top of two stands is equipped with the top plate together, the base is equipped with the workpiece conveying mechanism for conveying workpiece, and the polishing mechanism for polishing workpiece is arranged in two stands.

[0005] Further, the polishing mechanism includes a lifting seat, a polishing assembly is arranged in the lifting seat, a tensioning mechanism is arranged above the polishing assembly, the polishing assembly is in transmission connection with the tensioning mechanism, a first driving device is connected to the top surface of the lifting seat, a second driving device is connected to one side surface of the lifting seat, the second driving device is in transmission connection with the polishing assembly, a first rubber roller assembly and a second rubber roller assembly are respectively arranged at both ends of the bottom of the lifting seat, first linear sliding modules are respectively arranged on the opposite inner walls of the two stands, and the lifting seat is in sliding connection with the stands through the first linear sliding modules.

[0006] By adopting the above technical scheme, when the workpiece is placed on the workpiece conveying mechanism and fixed, the workpiece conveying mechanism conveys the workpiece to the lower side of the polishing mechanism, the first driving device drives the lifting seat to move downward, thereby driving the polishing assembly to descend to the surface of the workpiece, and the second driving device drives the polishing assembly to uniformly polish the surface of the workpiece.

[0007] Further, the lifting seat includes a first rubber roller support, a sand belt wheel support and a second rubber roller support, the first rubber roller support, the sand belt wheel support and the second rubber roller support are arranged in parallel with each other, and the first rubber roller support, the sand belt wheel support and the second rubber roller support are integrally formed at the same end portion.

[0008] By setting the first rubber roller support, the abrasive belt wheel support and the second rubber roller support in the lifting seat in parallel with each other and integrally forming the first rubber roller support, the abrasive belt wheel support and the second rubber roller support at the same end, the first rubber roller support, the abrasive belt wheel support and the second rubber roller support at the same end are separated from each other, which facilitates the abrasive belt to be sleeved on the first abrasive belt wheel and the second abrasive belt wheel, and has the advantages of convenient replacement, quick replacement, high replacement efficiency, simple maintenance and low maintenance cost.

[0009] Preferably, the polishing assembly comprises a first abrasive belt wheel, two ends of the first abrasive belt wheel are respectively connected with a first bearing seat and a second bearing seat, the first bearing seat and the second bearing seat are respectively connected with bearing mounting members, one end of the first abrasive belt wheel is connected and mounted with one end of the abrasive belt wheel support through the first bearing seat and the bearing mounting member at the same end, and the other end of the first abrasive belt wheel is connected and mounted with the other end of the abrasive belt wheel support through the second bearing seat and the bearing mounting member at the same end.

[0010] Preferably, the second driving device comprises a motor arranged on one side of the lifting seat, the motor is provided with a driving synchronous wheel at the output end, one end of the first abrasive belt wheel is provided with a driven synchronous wheel, and the driving synchronous wheel and the driven synchronous wheel are jointly connected with a synchronous belt.

[0011] The motor drives the driving synchronous wheel to rotate, the driving synchronous wheel drives the driven synchronous wheel to rotate through the synchronous belt, and the driven synchronous wheel drives the first abrasive belt wheel to rotate synchronously.

[0012] Preferably, the tensioning mechanism comprises a motor mounting plate mounted on the top surface of the abrasive belt wheel support, a stepping motor is arranged below the motor mounting plate and in the abrasive belt wheel support, the stepping motor is provided with a tensioning seat at the output end, the tensioning seat is provided with a second abrasive belt wheel at one side, two ends of the second abrasive belt wheel are respectively connected with a third bearing seat and a fourth bearing seat, and the second abrasive belt wheel is mounted on the tensioning seat through the third bearing seat and the fourth bearing seat.

[0013] The stepping motor of the tensioning mechanism drives the tensioning seat to ascend and descend to drive the second abrasive belt wheel to ascend and descend synchronously, the second abrasive belt wheel is driven by the stepping motor to move away from the first abrasive belt wheel to realize the adjustment of the distance between the second abrasive belt wheel and the first abrasive belt wheel, the second abrasive belt wheel is driven by the stepping motor to move close to the first abrasive belt wheel to realize the adjustment of the distance between the second abrasive belt wheel and the first abrasive belt wheel, and the design of the tensioning mechanism realizes the adjustment of the distance between the first abrasive belt wheel and the second abrasive belt wheel.

[0014] Preferably, the first abrasive belt wheel and the second abrasive belt wheel are jointly connected with an abrasive belt, and the first abrasive belt wheel is in transmission connection with the second abrasive belt wheel through the abrasive belt.

[0015] By adopting the technical scheme, when the first sand belt wheel rotates under the driving of the motor, the second sand belt wheel can be driven to rotate synchronously by the sand belt, and the surface of the workpiece in contact with the sand belt can be polished when the sand belt rotates. When the stepping motor drives the tensioning seat to descend, the second sand belt wheel can be driven to descend synchronously towards the first sand belt wheel to loosen the sand belt, so that the sand belt can be conveniently dismounted or replaced; conversely, after the sand belt is sleeved on the first sand belt wheel and the second sand belt wheel, the stepping motor of the tensioning mechanism drives the second sand belt wheel to ascend away from the first sand belt wheel to tighten the sand belt, which not only realizes quick replacement of the sand belt, but also ensures high replacement efficiency of the sand belt and reduces maintenance cost of the sand belt, and simultaneously, the tensioning mechanism can quickly adjust the tension of the sand belt to ensure high polishing precision and good polishing effect of the sand belt.

[0016] Further, the first rubber roller assembly comprises two rubber rollers arranged in parallel, and the same end of the two rubber rollers is connected with a double-shaft bearing seat, and a guide rod is arranged on the top surface of each double-shaft bearing seat, and a spring for buffering the rubber roller is sleeved on each guide rod.

[0017] Preferably, the upper end of the guide rod of the first rubber roller assembly is connected with the first rubber roller support, and the upper end of the guide rod of the second rubber roller assembly is connected with the second rubber roller support.

[0018] Further, the workpiece conveying mechanism comprises two second linear sliding modules and a third driving device arranged on the base, the third driving device is located between the two second linear sliding modules, and a workbench is connected to the two second linear sliding modules, in this embodiment, an electro-permanent magnetic chuck can be selectively installed on the workbench according to the use requirement to fix the workpiece placed thereon, and in other embodiments, a clamp can be selectively installed on the workbench according to the use requirement to fix the workpiece placed thereon and having a relatively light weight, and the workbench is not limited to this; the third driving device is in transmission connection with the workbench, and the third driving device drives the workbench to move back and forth on the two second linear sliding modules to cooperate with the polishing mechanism to polish the surface of the workpiece.

[0019] Compared with the prior art, the polishing mechanism has the following beneficial effects:

[0020] 1. The polishing assembly is provided with a tensioning mechanism, when the sand belt is installed, the stepping motor of the tensioning mechanism drives the second sand belt wheel to move away from the first sand belt wheel to tighten the sand belt, when the sand belt needs to be replaced, the stepping motor drives the second sand belt wheel to move close to the first sand belt wheel to loosen the sand belt, so that the sand belt can be conveniently dismounted, the design of the tensioning mechanism makes the replacement operation of the sand belt more convenient and the maintenance more simple, and the replacement efficiency and the maintenance efficiency of the sand belt can be greatly improved.

[0021] 2、 its through the design of the structure of the polishing mechanism, the first drive device of the polishing mechanism drives the lifting seat to lower to realize the automation of the sand belt to the workpiece surface, the second drive device drives the first sand belt wheel to rotate and then drives the sand belt to rotate to realize the automatic polishing of the workpiece surface, which realizes the automatic polishing of the workpiece, and has the advantages of high polishing efficiency and good polishing effect.

[0022] 3、 its through the first rubber roller assembly and the second rubber roller assembly are respectively arranged at both ends of the bottom of the lifting seat, the first rubber roller assembly and the second rubber roller assembly are used for pressing the workpiece, and the spring is used for buffering the rubber roller, which makes the sand belt realize the surface polishing of the workpiece, so as to ensure high polishing precision and good polishing effect.

[0023] 4、 its through the first rubber roller support, the sand belt wheel support and the second rubber roller support in the lifting seat of the polishing mechanism are arranged in parallel, and the same end of the first rubber roller support, the sand belt wheel support and the second rubber roller support is integrally formed, the same end of the first rubber roller support, the sand belt wheel support and the second rubber roller support is separated from each other, so that the sand belt is conveniently sleeved on the first sand belt wheel and the second sand belt wheel, the sand belt replacement is more convenient, and the maintenance is simpler, so that the maintenance cost is low.

[0024] 5、 its overall structure design can be suitable for installing the first sand belt wheel and the second sand belt wheel with a width of 600-3000MM and suitable for using the sand belt with a width of 800-3000MM, so that the width of the workpiece polished at one time reaches 600-3000MM, the polishing efficiency is greatly improved, the adjacent two polishing areas may appear a missing polishing area or overlapping polishing phenomenon is avoided, the polishing efficiency of the traditional grinding machine or the sand belt machine is improved by more than 5 times, the polishing time of the workpiece is greatly shortened, and the production capacity is greatly improved, and the problem of low polishing efficiency and poor polishing effect caused by the traditional sand belt machine needing to polish the stainless steel plate and the aluminum plate multiple times to complete the polishing of one plate surface is solved. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to facilitate the description, the utility model is described in detail by the following preferred embodiments and drawings.

[0026] Figure 1 It is a perspective view of the plane efficient sand belt polishing machine of the utility model.

[0027] Figure 2 It is a perspective view of the polishing mechanism of the plane efficient sand belt polishing machine of the utility model.

[0028] Figure 3It is the polishing mechanism different direction perspective drawing of the plane efficient abrasive belt polishing machine of the utility model.

[0029] Figure 4 It is the polishing mechanism different direction perspective drawing of the plane efficient abrasive belt polishing machine of the utility model.

[0030] Figure 5 It is the polishing mechanism different direction perspective drawing of the plane efficient abrasive belt polishing machine of the utility model.

[0031] Figure 6 It is the polishing mechanism different direction perspective drawing of the plane efficient abrasive belt polishing machine of the utility model.

[0032] Figure 7 It is the polishing mechanism different direction perspective drawing of the plane efficient abrasive belt polishing machine of the utility model.

[0033] Figure 8 It is the polishing mechanism different direction perspective drawing of the plane efficient abrasive belt polishing machine of the utility model.

[0034] Figure 9 It is the polishing mechanism different direction perspective drawing of the plane efficient abrasive belt polishing machine of the utility model. DETAILED DESCRIPTION

[0035] In order to facilitate understanding of the utility model, the utility model will be described more fully below with reference to the related drawings. The preferred embodiments of the utility model are shown in the drawings. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing the specific embodiments and are not intended to limit the utility model.

[0037] In the embodiment, please refer to Figure 1As shown in the figure, the plane efficient abrasive belt polishing machine comprises a base 1, a stand column 2, a top plate 3, a workpiece conveying mechanism 4 and a polishing mechanism 5, the stand column 2 is respectively arranged on the two side ends of the base 1; in the embodiment, the stand column 2 arranged on the same side of the base 1 is two, in other embodiments, different numbers of the stand column 2 can be arranged according to the actual situation; the top plate 3 is arranged on the top of all the stand columns 2, the workpiece conveying mechanism 4 is arranged on the base 1 and is used for conveying workpieces; the polishing mechanism 5 is arranged in the two stand columns 2 and is used for polishing workpieces.

[0038] Please refer to Figures 2-3 As shown in the figure, the polishing mechanism 5 comprises a lifting seat 6, a polishing assembly 7, a tensioning mechanism 8, a first driving device 91, a second driving device 92, a first rubber roller assembly 10, a second rubber roller assembly 11 and a first linear sliding module 12; the polishing assembly 7 is arranged in the lifting seat 6, the tensioning mechanism 8 is arranged above the polishing assembly 7, the polishing assembly 7 and the tensioning mechanism 8 are connected and installed through an abrasive belt 87, the top surface of the lifting seat 6 is connected and installed with the first driving device 91, the second driving device 92 is connected to one side surface of the lifting seat 6, the second driving device 92 is in transmission connection with the polishing assembly 7, the first rubber roller assembly 10 and the second rubber roller assembly 11 are respectively arranged at the two ends of the bottom of the lifting seat 6, the first linear sliding module 12 is respectively arranged on the inner walls of the two opposite stand columns 2, and the lifting seat 6 is in sliding connection with the stand columns 2 through the first linear sliding module 12.

[0039] Specifically, the first driving device 91 comprises a servo motor 911 arranged on the top surface of the lifting seat 6, the output end of the servo motor 911 is connected and installed with a first ball screw 913 through a shaft coupling 912, and the first ball screw 913 is fixedly installed with the lifting seat 6 through a fixing seat arranged thereon. In other embodiments, the first driving device 91 can also adopt a gear and rack assembly or a worm and gear assembly, and is not limited to this. The servo motor 911 drives the first ball screw 913 to rotate in the forward and reverse directions through the shaft coupling 912 to drive the lifting seat 6 to move up and down.

[0040] Specifically, the first linear sliding module 12 comprises a sliding rail 121 and a sliding block 122 sliding on the sliding rail 121.

[0041] Specifically, the lifting seat 6 is slidably installed on the inner walls of the two opposite stand columns 2 through the first linear sliding module 12, and the first driving device 91 drives the lifting seat 6 to move up and down on the first linear sliding module 12.

[0042] Please refer to Figures 4-5As shown, the lifting seat 6 includes a first rubber roller support 61, a sand belt wheel support 62 and a second rubber roller support 63, which are arranged in parallel and integrally formed at the same end.

[0043] As shown in Figure 4 and Figure 6 As shown, the polishing assembly 7 includes a first sand belt wheel 71, two ends of which are respectively connected with a first bearing seat 72 and a second bearing seat 73, and the first bearing seat 72 and the second bearing seat 73 are respectively connected with a bearing mounting 74. One end of the first sand belt wheel 71 is connected and installed with one end of the sand belt wheel support 62 through the first bearing seat 72 and the bearing mounting 74, and the other end of the first sand belt wheel 71 is connected and installed with the other end of the sand belt wheel support 62 through the second bearing seat 73 and the bearing mounting 74.

[0044] As shown in Figure 6 As shown, the second driving device 92 includes a motor 921 arranged on one side of the lifting seat 6, and the output end of the motor 921 is provided with a driving synchronous wheel 922. One end of the first sand belt wheel 71 close to the motor 921 is provided with a driven synchronous wheel 923, and the driving synchronous wheel 922 and the driven synchronous wheel 923 are commonly connected with a synchronous belt 924. The motor 921 drives the first sand belt wheel 71 to rotate through the driving synchronous wheel 922, the synchronous belt 924 and the driven synchronous wheel 923. The motor 921 drives the driving synchronous wheel 922 to rotate, which drives the driven synchronous wheel 923 to rotate synchronously through the synchronous belt 924, and the driven synchronous wheel 923 drives the first sand belt wheel 71 to rotate synchronously.

[0045] As shown in Figure 5 and Figure 6 As shown, the tensioning mechanism 8 includes a motor mounting plate 81 mounted on the top surface of the sand belt wheel support 62, and a stepping motor 82 is arranged below the motor mounting plate 81. The output end of the stepping motor 82 is provided with a tensioning seat 83, and a second sand belt wheel 84 is arranged on one side of the tensioning seat 83. The two ends of the second sand belt wheel 84 are respectively connected with a third bearing seat 85 and a fourth bearing seat 86, and the second sand belt wheel 84 is installed on the tensioning seat 83 through the third bearing seat 85 and the fourth bearing seat 86.

[0046] As shown in Figures 6-7 As shown, the first sand belt wheel 71 and the second sand belt wheel 84 are connected through a sand belt 87, and the first sand belt wheel 71 is drivingly connected with the second sand belt wheel 84 through the sand belt 87.

[0047] As shown in Figure 8As shown, the first rubber roller assembly 10 comprises two parallel rubber rollers 101, the same end of the two rubber rollers 101 is connected with a double shaft bearing seat 102, a guide rod 103 is arranged on the top surface of the double shaft bearing seat 102, a spring 104 is sleeved on the guide rod 103, and the spring 104 buffers the rubber roller 101.

[0048] Specifically, the double shaft bearing seat 102 is provided with one or more guide rods 103.

[0049] Specifically, the second rubber roller assembly 11 has the same structure as the first rubber roller assembly 10, the upper end of the guide rod 103 of the first rubber roller assembly 10 is connected with the first rubber roller support 61, and the upper end of the guide rod 103 of the second rubber roller assembly 11 is connected with the second rubber roller support 63.

[0050] Please refer to Figure 9 As shown, the workpiece conveying mechanism 4 comprises two second linear sliding modules 41 and a third driving device 42 arranged on the base 1, the third driving device 42 is located between the two second linear sliding modules 41, a workbench 43 is connected to the two second linear sliding modules 41, the third driving device 42 is in transmission connection with the workbench 43, and the third driving device 42 drives the workbench 43 to move back and forth on the two second linear sliding modules 41 to uniformly polish the surface of the workpiece in cooperation with the polishing mechanism 5.

[0051] Specifically, the third driving device 42 comprises a hydraulic cylinder 421 arranged between the two second linear sliding modules 41, the output end of the hydraulic cylinder 421 is provided with a second ball screw 422, and the second ball screw 422 is fixedly installed on the bottom surface of the workbench 43 through a nut support seat. In other embodiments, the third driving device 42 can also adopt a belt driving linear module and an electric cylinder linear module, and is not limited to this. The structure of the second linear sliding module 41 is the same as that of the first linear sliding module 12.

[0052] Please refer to Figures 1-9As shown, the working principle of the flat efficient abrasive belt polishing machine is as follows: first, the workpiece is placed on the workpiece conveying mechanism 4, the third driving device 42 drives the workbench 43 to move to the position directly below the polishing mechanism 5 through the second ball screw 422, the first driving device 91 of the polishing mechanism 5 drives the lifting seat 6 to descend to drive the polishing assembly 7 to descend to the surface of the workpiece, and the polishing assembly 7 is connected with the tensioning mechanism 8 above the polishing assembly 7, the second driving device 92 drives the polishing assembly 7 to rotate to drive the abrasive belt 87 to rotate to polish the surface of the workpiece, and the tensioning mechanism 8 drives the tensioning seat 83 to move up and down through the stepping motor 82 to adjust the distance between the second abrasive belt wheel 84 and the first abrasive belt wheel 71, when the stepping motor 82 drives the tensioning seat 83 to drive the second abrasive belt wheel 84 to move towards the first abrasive belt wheel 71, the tension of the abrasive belt 87 can be relaxed, at this time, the abrasive belt 87 is convenient to replace or maintain; when the first abrasive belt wheel 71 and the second abrasive belt wheel 84 are replaced with the abrasive belt 87, the stepping motor 82 drives the tensioning seat 83 to drive the second abrasive belt wheel 84 to move away from the first abrasive belt wheel 71, which can tension the abrasive belt 87, the design of the tensioning mechanism 8 not only makes the replacement and maintenance of the abrasive belt 87 more simple, fast and convenient, but also greatly improves the replacement efficiency and maintenance efficiency of the abrasive belt 87, and it also realizes the flexible adjustment of the tension of the abrasive belt 87 according to the different polishing requirements of the workpiece, so as to meet the different processing requirements of different workpieces, and further ensure the high polishing precision of the polishing assembly 7. At the same time, in order to further facilitate the replacement of the abrasive belt 87 and to facilitate the installation of the first abrasive belt wheel 71 and the second abrasive belt wheel 84 with wider width, the first rubber roller support 61, the abrasive belt wheel support 62 and the second rubber roller support 63 in the lifting seat 6 are arranged in parallel with each other and integrally formed at the same end of the first rubber roller support 61, the abrasive belt wheel support 62 and the second rubber roller support 63, and the first rubber roller support 61, the abrasive belt wheel support 62 and the second rubber roller support 63 are separated from each other at the same end, so as to facilitate the replacement of the abrasive belt 87, and the lifting seat 6 is matched with the tensioning mechanism 8, so that it can be suitable and fast to install the abrasive belt wheel (including the first abrasive belt wheel 71 and the second abrasive belt wheel 84) with a width of 600-3000MM and the abrasive belt 87 with a width of 800-3000MM, and further expand the polishing width of the workpiece to 600-3000MM each time, which greatly improves the polishing efficiency of the workpiece and expands the polishing surface of the workpiece each time, so as to have the advantages of high polishing efficiency and good polishing effect, so as to solve the problem of low polishing efficiency and poor polishing effect of the traditional abrasive belt machine for polishing the wider stainless steel plate and aluminum plate.

[0053] When the polishing mechanism 5 finishes polishing the workpiece, the first driving device 91 of the polishing mechanism 5 drives the lifting seat 6 to ascend to drive the polishing assembly 7 to ascend, and the third driving device 42 drives the workbench 43 to move away from the polishing mechanism 5 through the second ball screw 422 to unload the workpiece finished polishing and load the next workpiece to be polished, and the cycle is repeated.

[0054] The above embodiment is only an example of the present application and is not intended to limit the implementation and scope of the present application. Any technical solution that is the same as or equivalent to the content described in the claims of the present application should be included in the protection scope of the present application.

Claims

1. A high-efficiency flat sand belt polishing machine, comprising a base, two vertical columns respectively arranged on both sides of the base, and a top plate arranged on the top of the two vertical columns, characterized in that: The base is provided with a workpiece conveying mechanism for conveying workpieces, and the two upright columns are internally provided with a polishing mechanism for polishing workpieces; The polishing mechanism comprises a lifting seat, the lifting seat is internally provided with a polishing assembly, the polishing assembly is provided with a tensioning mechanism above, the polishing assembly is in transmission connection with the tensioning mechanism, the top surface of the lifting seat is connected with a first driving device, one side surface of the lifting seat is connected with a second driving device, the second driving device is in transmission connection with the polishing assembly, the bottom of the lifting seat is respectively provided with a first rubber roller assembly and a second rubber roller assembly, the opposite inner walls of the two upright columns are respectively provided with first linear sliding modules, and the lifting seat is in sliding connection with the upright columns through the first linear sliding modules.

2. The planar high-efficiency abrasive belt sander according to claim 1, characterized in that: The lifting seat comprises a first rubber roller support, a sand belt wheel support and a second rubber roller support, the first rubber roller support, the sand belt wheel support and the second rubber roller support are arranged in parallel with each other and are integrally formed at the same end portion.

3. The planar high-efficiency abrasive belt sander according to claim 2, characterized in that: The polishing assembly comprises a first sand belt wheel, the two end portions of the first sand belt wheel are respectively connected with a first bearing seat and a second bearing seat, the first bearing seat and the second bearing seat are respectively connected with bearing mounting pieces, one end portion of the first sand belt wheel is connected and mounted with one end portion of the sand belt wheel support through the first bearing seat and the bearing mounting piece, and the other end portion of the first sand belt wheel is connected and mounted with the other end portion of the sand belt wheel support through the second bearing seat and the bearing mounting piece.

4. The planar high-efficiency abrasive belt sander according to claim 3, characterized in that: The second driving device comprises a motor arranged on one side of the lifting seat, the output end of the motor is provided with a driving synchronous wheel, one end portion of the first sand belt wheel is provided with a driven synchronous wheel close to the motor, and the driving synchronous wheel and the driven synchronous wheel are jointly connected with a synchronous belt.

5. The planar high-efficiency abrasive belt sander of claim 3, wherein: The tensioning mechanism comprises a motor mounting plate, the lower surface of the motor mounting plate is provided with a stepping motor, the output end of the stepping motor is provided with a tensioning seat, one side of the tensioning seat is provided with a second sand belt wheel, the two end portions of the second sand belt wheel are respectively connected with a third bearing seat and a fourth bearing seat, and the second sand belt wheel is mounted on the tensioning seat through the third bearing seat and the fourth bearing seat.

6. The planar high-efficiency abrasive belt sander of claim 5, wherein: The first sand belt wheel and the second sand belt wheel are jointly connected with a sand belt, and the first sand belt wheel is in transmission connection with the second sand belt wheel through the sand belt.

7. The planar high-efficiency abrasive belt sander of claim 1, wherein: The first rubber roller assembly comprises two rubber rollers arranged in parallel, the same end portions of the two rubber rollers are jointly connected with double-shaft bearing seats, and the top surfaces of each double-shaft bearing seat are provided with one or more guide rods, and each guide rod is provided with a spring for buffering the rubber roller.

8. The planar high-efficiency abrasive belt sander according to claim 2 or 7, characterized in that: The upper end portions of the guide rods of the first rubber roller assembly are connected with the first rubber roller support, and the upper end portions of the guide rods of the second rubber roller assembly are connected with the second rubber roller support.

9. The planar high-efficiency abrasive belt sander of claim 1, wherein: The workpiece conveying mechanism comprises two second linear sliding modules and a third driving device arranged on the base, the third driving device is located between the two second linear sliding modules, the worktable is jointly connected on the two second linear sliding modules, the third driving device is in transmission connection with the worktable, and the third driving device drives the worktable to move back and forth on the two second linear sliding modules to cooperate with the polishing mechanism to polish the surface of the workpiece.

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