CN111604766A - An automatic feeding device for grinding sandpaper - Google Patents

Abstract

The invention discloses an automatic feeding device for grinding sandpaper, comprising: a storage device for storing and outputting the sandpaper, a forward device for dragging the sandpaper to feed, a moving device for driving the sandpaper to move laterally to contact the grinding workpiece, and The lifting device, the storage device and the advancing device are respectively located on both sides of the lifting device. The lifting device is vertically connected with the moving device to drive the moving device to rise and fall. Both the storage device and the advancing device are connected in parallel with the moving device. One side, the moving unit, the other side of the lifting unit, and the advancing unit. By using the automatic feeding device for grinding sandpaper provided by the present invention, the purpose of precise grinding and rapid feeding of the sandpaper can be achieved, which is beneficial to improve the grinding efficiency and effect of the sandpaper.

Description

An automatic feeding device for grinding sandpaper

technical field

The invention relates to the technical field of dry sanding, and more particularly, to an automatic feeding device for sanding sandpaper.

Background technique

In the prior art, when grinding the output shaft of the motor, the sandpaper replacement and feeding operations are mostly carried out by manually grasping the sandpaper, resulting in the inability to complete the grinding operation accurately and quickly.

To sum up, how to provide a device that can quickly and accurately perform the sandpaper feeding operation is an urgent problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide an automatic feeding device for grinding sandpaper, which can realize the purpose of precise grinding and rapid feeding of the sandpaper, which is beneficial to improve the sandpaper grinding efficiency and effect, and the device has a compact structure and is easy to use. Can be used for promotion.

In order to achieve the above object, the present invention provides the following technical solutions:

An automatic feeding device for grinding sandpaper, comprising: a storage device for storing and outputting sandpaper, a forward device for dragging the sandpaper to feed, a moving device for driving the sandpaper to move laterally to contact a grinding workpiece, and A lifting device, the storage device and the advancing device are respectively located on both sides of the lifting device, the lifting device is vertically connected with the moving device to drive the moving device to rise and fall, the storage device and the advancing device All are connected in parallel with the moving device, and the sandpaper goes around the storage device, one side of the lifting device, the moving device, the other side of the lifting device, and the advancing device in sequence.

Preferably, the installation bottom plate of the mobile device is arranged on the top of the lifting device, the storage device and the advancing device are both arranged on the lifting bottom plate, the lifting bottom plate and the mounting bottom plate are connected by connecting rods, and the lifting and lowering The bottom plate is provided with an opening that is convenient for the lifting device to pass through, the two sides of the opening are correspondingly provided with a rotating piece that facilitates the transmission of sandpaper, and the position corresponding to the rotating piece of the mounting bottom plate is provided with a preset for the sandpaper to pass through. Leave a hole, the top of the mobile device is provided with a sandpaper support for changing the movement direction of the sandpaper.

Preferably, the moving device includes a moving support for driving the sandpaper support to move laterally, a linear transmission device for driving the moving support to move laterally, and an elastic module for resetting the moving support. The sandpaper The bracket is arranged on the top of the moving bracket, and the linear transmission device and the elastic module are respectively arranged on the left and right sides of the moving bracket.

Preferably, the moving bracket is movably arranged on the installation base plate, and the installation base plate is provided with a linear guide rail for restricting the movement track of the moving bracket.

Preferably, a shock absorbing member is provided between the linear transmission device and the moving bracket, and the shock absorbing member is used to reduce the impact force on the linear transmission device when the moving bracket is reset.

Preferably, the storage device includes a storage bracket vertically connected to the lifting bottom plate, a reel for storing the sandpaper, a transmission shaft for driving the reel to rotate, and a drive shaft for ensuring that the reel does not loosen The damping module, the sandpaper is wound around the outer periphery of the reel, the damping module and the reel are respectively arranged on both sides of the storage bracket, and the transmission shaft sequentially runs through the damping module, the storage stand and the reel.

Preferably, the side of the reel away from the bracket is provided with a splint for clamping the reel and a locking member for locking the reel and the splint on the drive shaft, The splint is arranged in contact with the reel, and the locking member is connected with the end of the transmission shaft.

Preferably, the advancing device includes an advancing bracket vertically connected to the lifting bottom plate, a rolling member for dragging the sandpaper to feed, a driving member for driving the rolling member to rotate, and a driving member for pressing the The rolling element is used to tighten the tensioning element of the sandpaper, the driving element and the tensioning element are respectively arranged at two ends of the rolling element, and the rolling element is connected with the advancing support.

Preferably, the driving member includes a motor and a rotating shaft connected with the output shaft of the motor, and the rolling member includes a main roller for connecting with the rotating shaft to rotate synchronously and a main roller for cooperating with the main roller To pinch pull the sandpaper from the rollers.

Preferably, both the lifting device and the moving device are reciprocating linear motion modules.

When using the automatic feeding device for polishing sandpaper provided by the present invention, the sandpaper is output from the storage device and then goes around one side of the lifting device, the moving device, and the other side of the lifting device in turn, and is finally dragged by the advancing device to realize the sandpaper feeding. During the operation of the sandpaper, when the grinding workpiece needs to be polished, the lifting device can be controlled to rise, so that the sandpaper is moved to a position flush with the grinding workpiece, and then the moving device is controlled to drive the sandpaper to move laterally, so that the sandpaper contacts and grinds The workpiece is subjected to grinding operations. When the grinding operation of the grinding workpiece is completed, the moving device can be controlled to move laterally in the opposite direction to keep away from the grinding workpiece, and then the lifting device can be controlled to descend to the original position, so as to facilitate the grinding operation of the next grinding workpiece. And since both the storage device and the advancing device are connected in parallel with the moving device, the moving track of the sandpaper from the storage device to the moving device and the moving track from the moving device to the forwarding device can remain unchanged, so as to ensure the accurate sanding position.

To sum up, the automatic feeding device for grinding sandpaper provided by the present invention can achieve the purpose of precise grinding and rapid feeding of the sandpaper, which is beneficial to improve the grinding efficiency and effect of the sandpaper. Promote use.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

Fig. 1 is the structural representation of the polishing sandpaper automatic feeding device provided by the present invention;

2 is a schematic structural diagram of a storage device;

Fig. 3 is the structural representation of advancing device;

FIG. 4 is a schematic diagram of the movement trajectory of the sandpaper.

In Figures 1-4:

1 is the lifting device, 2 is the installation bottom plate, 3 is the lifting bottom plate, 4 is the connecting rod, 5 is the rotating piece, 6 is the reserved hole, 7 is the sandpaper support, 8 is the moving support, 9 is the linear transmission device, and 10 is the Elastic module, 11 is a linear guide rail, 12 is a shock absorber, 13 is a storage bracket, 14 is a reel, 15 is a transmission shaft, 16 is a damping module, 17 is a splint, 18 is a locking piece, 19 is a forward bracket, 20 21 is the rolling element, 21 is the tensioning element, 22 is the motor, 23 is the rotating shaft, 24 is the connecting block, 25 is the bottom plate of the whole machine, 26 is the storage device, 27 is the advancing device, and 28 is the sandpaper movement track.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The core of the present invention is to provide an automatic feeding device for grinding sandpaper, which can realize the purpose of precise grinding and rapid feeding of the sandpaper, which is beneficial to improve the grinding efficiency and effect of the sandpaper, and the device has a compact structure and is convenient to use, and can be widely used. .

Please refer to FIGS. 1 to 4 , wherein, FIG. 1 is a schematic structural diagram of an automatic feeding device for polishing sandpaper provided by the present invention; FIG. 2 is a structural schematic diagram of a storage device; FIG. 3 is a structural schematic diagram of a forwarding device; FIG. 4 is a sandpaper Schematic diagram of the motion trajectory.

This specific embodiment provides an automatic feeding device for grinding sandpaper, including: a storage device 26 for storing and outputting sandpaper, a forward device 27 for dragging the sandpaper to feed, and for driving the sandpaper to move laterally to contact the grinding workpiece The moving device and the lifting device 1, the storage device 26 and the forwarding device 27 are located on both sides of the lifting device 1 respectively, the lifting device 1 is vertically connected with the moving device to drive the moving device to lift, and the storage device 26 and the forwarding device 27 are parallel to the moving device. After connecting, the sandpaper goes around the storage device 26 , one side of the lifting device 1 , the moving device, the other side of the lifting device 1 , and the advancing device 27 in sequence.

It should be noted that since both the storage device 26 and the advancing device 27 are connected in parallel with the moving device, the movement track of the sandpaper from the storage device 26 to the moving device and the moving track from the moving device to the advancing device 27 can remain unchanged to ensure Precise sanding position. The storage device 26 can be provided as the reel 14 so that the sandpaper can be pulled from the reel 14 as the advancing device 27 pulls the sandpaper.

The structure, size, position, etc. of the storage device 26 , the advancing device 27 , the moving device and the lifting device 1 can be determined in the actual application process according to the actual situation and actual demand.

It should also be noted that, when using the automatic feeding device for grinding sandpaper provided by the present invention, the sandpaper is output from the storage device 26 and then goes around one side of the lifting device 1, the moving device, and the other side of the lifting device 1 in sequence, and is finally advanced. The device 27 is dragged for sandpaper feeding. During the operation of the sandpaper, when the grinding workpiece needs to be polished, the lifting device 1 can be controlled to rise, so that the sandpaper is moved to a position flush with the grinding workpiece, and then the moving device is controlled to drive the sandpaper to move laterally so that the sandpaper is in contact with the sandpaper. Grinding the workpiece for grinding operations. After the grinding operation of the grinding workpiece is completed, the moving device can be controlled to move laterally in the opposite direction to keep away from the grinding workpiece, and then the lifting device 1 can be controlled to descend to the original position, so as to facilitate the grinding operation of the next grinding workpiece.

To sum up, the automatic feeding device for grinding sandpaper provided by the present invention can achieve the purpose of precise grinding and rapid feeding of the sandpaper, which is beneficial to improve the grinding efficiency and effect of the sandpaper. Promote use.

On the basis of the above-mentioned embodiment, preferably, the installation bottom plate 2 of the mobile device is arranged on the top of the lifting device 1 , the storage device 26 and the advancing device 27 are both arranged on the lifting bottom plate 3 , and the lifting bottom plate 3 and the installation bottom plate 2 are connected by the connecting rod 4 . , the lifting bottom plate 3 is provided with an opening that is convenient for the lifting device 1 to pass through, and the two sides of the opening are correspondingly provided with a rotating member 5 that is convenient for sandpaper transmission. 6. The top of the mobile device is provided with a sandpaper holder 7 for changing the moving direction of the sandpaper, so that the sandpaper can be output from the storage device 26, and then pass through one side of the lifting device 1, the mobile device, and the other side of the lifting device 1, and finally be advanced by the device. 27Drag for sandpaper feed operation.

It should be noted that the lifting device 1 can be fixed on the bottom plate 25 of the whole machine to which the sandpaper is automatically fed to the device. The lifting device 1 can pass through the bottom plate 25 of the whole machine for lifting movement, and the lifting process of the lifting device 1 can drive the installation of the mobile device. The bottom plate 2 is lifted and lowered, and the lifting bottom plate 3 can be synchronously driven up and down during the lifting process of the installation bottom plate 2. This process can ensure that the trajectory of the sandpaper feeding process remains unchanged, which is more conducive to ensuring the accuracy and consistency of the sandpaper grinding position. The sandpaper movement trajectory 28 may refer to the path shown in FIG. 4 . The same reserved holes 6 can be set on the bottom plate 25 of the whole machine corresponding to the mounting bottom plate 2 to facilitate the passage and feeding of the sandpaper.

It should also be noted that, during the grinding operation of the grinding workpiece, the movement of the lifting device 1 and the moving device can be controlled so that one side of the sandpaper support 7 approaches and contacts the grinding workpiece, thereby performing the workpiece grinding operation.

In the actual application process, according to the actual situation and actual needs, the shape, size, structure, location, material, etc.

Preferably, the moving device includes a moving support 8 for driving the sandpaper support 7 to move laterally, a linear conveying device 9 for driving the moving support 8 to move laterally, and an elastic module 10 for resetting the moving support 8. The sandpaper support 7 is located in On the top of the moving bracket 8 , the linear conveying device 9 and the elastic module 10 are respectively arranged on the left and right sides of the moving bracket 8 .

In this embodiment, when the moving device moves to a height position flush with the grinding workpiece along with the lifting device 1, the linear conveying device 9 can be controlled to run to drive the moving bracket 8 to move laterally, so that the grinding workpiece can be placed on the sandpaper support 7 On one side, when the grinding workpiece is placed in place, the linear conveying device 9 can be controlled to stop working, and the moving bracket 8 can move in the opposite direction under the elastic force of the elastic module 10, so that the sandpaper support 7 is close to the grinding workpiece, so as to facilitate Carry out subsequent grinding operations.

Preferably, the moving bracket 8 is movably arranged on the installation base plate 2, and the installation base plate 2 is provided with a linear guide 11 for restricting the movement trajectory of the moving bracket 8, that is, when the mobile device moves laterally from side to side, the movement bracket 8 and the sandpaper support 7. There will be no position deviation, and the moving bracket 8 will only move left and right laterally along the linear guide 11, so as to ensure that the movement trajectory of the sandpaper remains in a predetermined state, which is beneficial to ensure the accuracy and consistency of the sandpaper grinding position.

Preferably, a shock absorbing member 12 is provided between the linear transmission device 9 and the moving bracket 8 , and the shock absorbing member 12 is used to reduce the impact force on the linear transmission device 9 when the moving bracket 8 is reset.

It should be noted that the shock absorbing member 12 can be set as a buffer material member, so that when the moving bracket 8 is reset and moved under the action of the elastic force of the elastic module 10, the impact force of the moving bracket 8 on the linear transmission device 9 can be effectively reduced, In order to avoid damage to the linear conveying device 9 and the moving bracket 8, it is beneficial to improve the service life of the device.

The shape, size, structure, position, material, etc. of the motion bracket 8 , the linear transmission device 9 , the elastic module 10 , the linear guide 11 and the shock absorbing member 12 can be determined in the actual application process according to the actual situation and actual demand.

On the basis of the above-mentioned embodiment, preferably, the storage device 26 includes a storage bracket 13 vertically connected to the lifting bottom plate 3, a reel 14 for storing sandpaper, a transmission shaft 15 for driving the reel 14 to rotate, and a drive shaft 15 for ensuring the rotation of the reel 14. The damping module 16 of the reel 14 is not loose, the sandpaper is wound around the outer periphery of the reel 14, the damping module 16 and the reel 14 are respectively arranged on both sides of the storage bracket 13, and the transmission shaft 15 runs through the damping module 16, the storage bracket 13 and the roll Disc 14.

It should be noted that the lifting device 1 can drive the storage bracket 13 to move up and down when the lifting device 1 is lifted, and when the forward device 27 drags the sandpaper, the sandpaper can be rotated and output along the reel 14. Since the damping module 16 is provided, it can effectively ensure the rolling The disc 14 is not loose and will not affect the smooth rotation of the reel 14, so that the sandpaper can be output smoothly and continuously.

Preferably, the side of the reel 14 away from the bracket is provided with a splint 17 for clamping the reel 14 and a locking member 18 for locking the reel 14 and the splint 17 on the drive shaft 15, and the splint 17 fits the roll The disc 14 is provided, and the locking member 18 is connected with the end of the transmission shaft 15, so as to effectively ensure the fixing effect of the reel 14, so as to avoid the loose sandpaper in the reel 14 and affect the feeding of the sandpaper. Therefore, the reel 14 and the transmission When the shaft 15 is rotated, the sandpaper can be effectively and continuously output.

In the actual application process, according to the actual situation and actual needs, the shape, size, structure, position and material of the storage bracket 13, the reel 14, the transmission shaft 15, the damping module 16, the splint 17 and the locking member 18 can be adjusted. Sure.

On the basis of the above embodiment, preferably, the advancing device 27 includes an advancing bracket 19 vertically connected to the lifting bottom plate 3, a rolling member 20 for dragging the sandpaper to feed, a driving member for driving the rolling member 20 to rotate, and a For the tensioning member 21 for pressing the rolling member 20 to tighten the sandpaper, the driving member and the tensioning member 21 are respectively arranged at both ends of the rolling member 20 , and the rolling member 20 is connected with the advancing bracket 19 .

In this embodiment, the lifting device 1 can drive the advancing bracket 19 to move up and down synchronously, and when the driving member starts to run, it can drive the rolling member 20 to roll, and the rolling member 20 can drag the sandpaper during the rolling process, so that the The sandpaper can be output from the reel 14 , and then wind through one side of the lifting device 1 , the sandpaper support 7 of the mobile device, and the other side of the lifting device 1 , and finally be pulled and fed by the rolling element 20 .

In addition, since one end of the rolling member 20 is provided with a tensioning member 21, the tensioning member 21 can effectively compress the rolling member 20, so that the sandpaper is effectively tensioned when the rolling member 20 drags the sandpaper, which is beneficial to improve the feeding effect of the sandpaper. And ensure the movement trajectory of the sandpaper.

Preferably, the tension member 21 can be set as a spring to effectively compress the rolling member 20 .

Preferably, the driving member includes a motor 22 and a rotating shaft 23 connected with the output shaft of the motor 22, and the rolling member 20 includes a main roller for connecting with the rotating shaft 23 to rotate synchronously and a main roller for clamping and pulling the sandpaper in cooperation with the main roller. from the scroll wheel.

It should be noted that a connecting block 24 may be provided between the output shaft of the motor 22 and the rotating shaft 23 to improve the rotational stability of the rotating shaft 23 . During use, the operator can control the rotation speed of the rotating shaft 23 by controlling the motor 22 to control the rotation speed of the main roller and the slave roller, and finally can effectively control the feeding speed of the sandpaper, so as to realize the uniform feeding of the sandpaper, which is beneficial to Improve the sanding effect of sandpaper.

It should also be noted that, since the storage device 26 and the advancing device 27 are both arranged on the lifting bottom plate 3, and are located on both sides of the lifting device 1, and the lifting bottom plate 3 is connected to the mounting bottom plate 2 of the mobile device and moves synchronously, therefore, the rotation When the motor 22 rotates the main roller and the slave roller to drag the sandpaper, it can ensure that the sandpaper moves at a constant speed and equidistant in the predetermined trajectory, so as to ensure the continuous operation of the sandpaper feeding operation and the accuracy and consistency of the sanding position of the sandpaper. Moreover, the automatic feeding device for grinding sandpaper provided by the present invention has the advantages of compact structure, stable grinding effect, precise grinding position, and automatic feeding of sandpaper, which can be popularized and used.

The shape, structure, size, position, etc. of the advancing bracket 19 , the rolling element 20 , the driving element and the tensioning element 21 can be determined in the actual application process according to the actual situation and actual demand.

On the basis of the above embodiment, preferably, the lifting device 1 and the moving device are both reciprocating linear motion modules.

It should be noted that, since the moving device can drive the sandpaper to move left and right laterally, the moving device can be set as a cylinder linear reciprocating module. Since the lifting device 1 can perform up and down movements, the lifting device 1 can be set as an electric cylinder linear reciprocating motion module. Of course, it is also possible to set the lifting device 1 and the moving device as other types of reciprocating linear motion modules in the actual application process, according to the actual situation and actual needs.

In addition, it should also be noted that the orientation or positional relationship indicated by "up and down", "left and right", etc. in this application is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of simplified description and easy understanding, not An indication or implication that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, is not to be construed as a limitation of the invention.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. Any combination of all the embodiments provided by the present invention falls within the protection scope of the present invention, and is not repeated here.

The automatic feeding device for polishing sandpaper provided by the present invention has been described in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (10)

1. An automatic feeding device for grinding sandpaper, characterized in that it comprises: a storage device (26) for storing and outputting sandpaper, a forward device (27) for dragging the sandpaper to feed, The sandpaper moves laterally to contact a moving device and a lifting device (1) for grinding the workpiece, the storage device (26) and the advancing device (27) are respectively located on both sides of the lifting device (1), and the lifting device ( 1) It is vertically connected to the moving device to drive the moving device to rise and fall, the storage device (26) and the advancing device (27) are both connected in parallel with the moving device, and the sandpaper is wound around the moving device in turn. A storage device (26), one side of the lifting device (1), the moving device, the other side of the lifting device (1), and the advancing device (27). 2 . The automatic feeding device for sanding paper according to claim 1 , wherein the installation bottom plate ( 2 ) of the moving device is arranged on the top of the lifting device ( 1 ), and the storage device ( 26 ) and the The advancing devices (27) are all provided on the lifting bottom plate (3), the lifting bottom plate (3) and the mounting bottom plate (2) are connected by connecting rods (4), and the lifting bottom plate (3) is provided with a The opening through which the lifting device (1) passes, the two sides of the opening are correspondingly provided with rotating members (5) that facilitate the transmission of sandpaper, and the corresponding positions of the mounting bottom plate (2) and the rotating member (5) are provided to facilitate the A reserved hole (6) through which the sandpaper passes, and a sandpaper support (7) for changing the movement direction of the sandpaper is provided on the top of the mobile device. 3 . The automatic feeding device for sanding paper according to claim 2 , wherein the moving device comprises a moving bracket ( 8 ) for driving the sand paper support ( 7 ) to move laterally, and for driving the moving A linear conveying device (9) for lateral movement of the support (8) and an elastic module (10) for resetting the moving support (8), the sandpaper support (7) is arranged on the top of the moving support (8), The linear conveying device (9) and the elastic module (10) are respectively arranged on the left and right sides of the moving bracket (8). 4. The automatic feeding device for sanding paper according to claim 3, characterized in that, the moving bracket (8) is movably arranged on the installation base plate (2), and the installation base plate (2) is provided with a The linear guide rail (11) is used to limit the movement track of the moving bracket (8). 5 . The automatic feeding device for sanding paper according to claim 4 , wherein a shock absorbing member ( 12 ) is arranged between the linear conveying device ( 9 ) and the moving bracket ( 8 ), and the reducing The shock element (12) is used to reduce the impact force on the linear transmission device (9) when the moving bracket (8) is reset. 6. The automatic feeding device for sanding paper according to any one of claims 2 to 5, wherein the storage device (26) comprises a storage bracket (13) vertically connected with the lifting bottom plate (3), a reel (14) for storing the sandpaper, a transmission shaft (15) for driving the reel (14) to rotate, and a damping module (16) for ensuring that the reel (14) is not loose, The sandpaper is wound around the outer periphery of the reel (14), the damping module (16) and the reel (14) are respectively arranged on both sides of the storage bracket (13), and the transmission shaft (15) ) sequentially penetrates through the damping module (16), the storage support (13) and the reel (14). 7. The automatic feeding device for sanding paper according to claim 6, characterized in that, the side of the reel (14) away from the support is provided with a splint (17) for clamping the reel (14). ) and a locking member (18) for locking the reel (14) and the clamping plate (17) on the transmission shaft (15), the clamping plate (17) fitting the reel (14) It is provided that the locking member (18) is connected with the end of the transmission shaft (15). 8. The automatic feeding device for sanding paper according to any one of claims 2 to 5, wherein the advancing device (27) comprises an advancing bracket (19) vertically connected to the lifting bottom plate (3), A rolling member (20) for dragging the sandpaper to feed, a driving member for driving the rolling member (20) to rotate, and a pulling member for pressing the rolling member (20) to tighten the sandpaper A tensioning member (21), the driving member and the tensioning member (21) are respectively provided at both ends of the rolling member (20), and the rolling member (20) is connected with the advancing bracket (19). 9 . The automatic feeding device for sanding paper according to claim 8 , wherein the driving member comprises a motor ( 22 ) and a rotating shaft ( 23 ) connected with the output shaft of the motor ( 22 ). The rolling element (20) includes a main roller for connecting with the rotating shaft (23) to rotate synchronously, and a slave roller for cooperating with the main roller to clamp and pull the sandpaper. 10. The automatic feeding device for sanding paper according to any one of claims 1 to 5, wherein the lifting device (1) and the moving device are both reciprocating linear motion modules.

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