CN102837247B - Working table of abrasive belt machine - Google Patents

Abstract

The invention provides a workbench of a sand belt machine, which belongs to the technical field of operation. The utility model solves the problem that it is difficult to stably hold the workpiece when the polishing machine is used to grind the workpiece. The workbench of this belt machine includes a workbench located at the front side of the abrasive belt grinding section. Between the workbench and the frame, at least the plane where the plate surface of the workbench is located and the sand of the abrasive belt grinding section can be adjusted. The angle between the planes where the surface is located and the plane where the plate surface of the workbench is located and the plane where the sand surface of the abrasive belt grinding section is located during adjustment are always connected by the connection adjustment structure on the horizontal plane. The worktable of the belt machine has the function of assisting in positioning the workpiece, assisting in determining the angle between the grinding surface of the workpiece and the positioning surface, and guiding the feeding of the workpiece. The workbench of the abrasive belt machine can be adjusted and fixed only by screwing the bolts and moving the corresponding parts, so it can be seen that it has the advantage of convenient adjustment.

Description

Belt machine workbench

technical field

The invention belongs to the technical field of operation, and relates to an abrasive belt machine, in particular to a workbench of an abrasive belt machine.

Background technique

The belt machine is a device used to grind the outer surface of the workpiece and improve the finish of the workpiece. The use of abrasive belt machining has the advantages of high production efficiency and high product qualification rate; thus it is widely used in various fields, especially in hardware, plumbing and furniture industries.

There are many types of belt machines, such as a flat abrasive belt polishing machine proposed by the applicant [application number: 200610118511.9; authorized announcement number: CN1962191B], which includes a frame with a workbench, which is equipped with a The rotating shaft connected to the mechanism, the driving wheel is connected to the rotating shaft, and the driven wheel and the tensioning wheel are also arranged on the frame. The driving wheel, the driven wheel and the tensioning wheel are sleeved with abrasive belts. It is arranged in parallel with the abrasive belt, and a column is arranged on the frame, and the above-mentioned tensioning wheel is arranged at the column, and a tensioning device capable of moving the tensioning wheel is arranged between the tensioning wheel and the column. When using the polishing machine to grind workpieces, the workpieces are fixed on the workbench, the surface to be ground must be a horizontal plane, and the workpiece feed is completed by lifting the workbench.

Another example is a kind of vertical abrasive belt grinding machine [application number: 00259206.1; authorized announcement number: CN2449871Y] designed by an applicant from Taiwan, China. Set up a vertical frame, set a tensioning wheel on the upper part of the vertical frame, and set a tension wheel on the top of the vertical frame, set up a group of abrasive belts by two tensioning wheels, and use a protective box to cover and isolate only the abrasive belt below. In the exposed shape, a connecting pipe is set on the top of the protective box to connect the dust collection equipment, and the pulley connected to one end of the lower tensioning wheel cooperates with a transmission belt to connect the motor inside the machine. When using the vertical abrasive belt grinder to grind workpieces, the workpieces are fixed on the storage platform, and the feeding of the workpieces is realized by manipulating the storage platform; the grinding machine uses exposed abrasive belts for grinding. The table top of the above two workbenches and the grinding section of the abrasive belt are all processed in a parallel state. When the processing grinding surface and the positioning surface are not parallel, pads are needed to support the workpiece, which makes the structure of the fixed workpiece complicated, and Different workpieces also require specific development of pads, which also increases production costs.

Another example is a belt changing mechanism for an abrasive belt flat polishing machine proposed by the applicant before [application number: 01254790.5; authorized announcement number: CN2505230Y]. The abrasive belt flat polishing machine is composed of a body, a motor, a driving wheel and a driven wheel. Both the wheel and the driven wheel are fixed on the body and are located on the same horizontal plane. When using this polishing machine to grind a workpiece, the workpiece is held and pressed on the surface of the abrasive belt from top to bottom, and the back of the abrasive belt is against the body, thereby completing the fixing and feeding of the workpiece at the same time. When processing workpieces such as triangular prisms, due to the uneven force and pressure applied by people, the amount of grinding on the same side will be different, which will affect the accuracy of the workpiece; at the same time, there will be a problem of difficulty in stably holding the workpiece.

Contents of the invention

The object of the present invention is to solve the above-mentioned problems in the prior art, and propose a workbench of a belt machine. The belt machine with the workbench can avoid the problem of difficult positioning of workpieces when the positioning surface and the grinding surface are non-parallel.

The purpose of the present invention can be achieved through the following technical solutions: a kind of workbench of belt machine, belt machine comprises frame, motor and sand belt, is provided with a driven wheel and a driving wheel at least in the annular circle of sand belt; The driving wheel is located above the driving wheel, the driven wheel and the driving wheel are positioned on the frame, the motor is fixed on the frame, and the motor shaft is connected to the driving wheel; the section of the abrasive belt between the driven wheel and the driving wheel is the grinding section ; It is characterized in that the workbench includes a workbench located at the front side of the abrasive belt grinding section, and the plane between the workbench and the frame can at least adjust the plane where the plate surface of the workbench is located and the abrasive belt grinding section The angle between the planes where the sand surface is located and the intersecting line between the plane where the plate surface of the worktable is located and the plane where the sand surface of the abrasive belt grinding section is located is always on the horizontal plane.

The angle between the table surface of this workbench and the abrasive belt grinding section can be flexibly adjusted according to the angle between the workpiece grinding surface and the positioning surface. Adjust the size of the included angle between the abrasive belt grinding sections to be the same as the included angle between the workpiece grinding surface and the positioning surface. Thus, when the workpiece is processed, the positioning surface leans against the surface of the worktable and is gradually pushed towards the abrasive belt. When people hold the workpiece, they have auxiliary positioning, thereby improving the stability of the fixed workpiece. At the same time, when the workpiece moves along the surface of the worktable, the stability of the workpiece feeding is also improved. The surface of the worktable is used as the reference plane during processing, which also effectively improves the processing accuracy.

In the above-mentioned workbench of the abrasive belt machine, the connection adjustment structure includes a connection part that both ends of the workbench are folded down, and the two connection parts and the frame are connected by bolts and nuts; The axes of the bolts in the two groups of bolts and nuts are located on the same horizontal plane and coincide with the same straight line. The angle between the plane where the plate surface of the worktable is located and the plane where the sand surface of the abrasive belt grinding section is located can be adjusted by screwing the bolts and nuts and swinging the worktable.

In the above-mentioned workbench of the abrasive belt machine, two chutes corresponding to the positions of the bolts and nuts are provided on the frame, and the longitudinal line of the chute is in line with the plane where the above-mentioned board surface is located. The intersecting line of the plane where the sand surface of the abrasive belt grinding section is located is vertical; the bolts in the bolts and nuts are embedded in the chute. By screwing the bolts and nuts, swinging the worktable and pushing and pulling the worktable, not only can the angle between the plane of the worktable and the plane of the sand surface of the abrasive belt grinding section be adjusted, but also the The distance between the worktable and the abrasive belt.

In the workbench of the belt sander mentioned above, the frame includes a box at the bottom and a support bar whose lower end is fixed on the top surface of the box, the driven wheel is positioned on the support bar, the driving wheel is positioned in the box, and the box On the top wall of the body, there is a step-off dust collection port for the abrasive belt to pass through and for the material produced by grinding to enter the box body. port. This structure makes the dust, powder and sand grains and other substances generated during the processing of the workpiece enter the box through the dust collecting hopper and the dust collecting port, which improves the environmental protection performance of the abrasive belt machine.

In the above-mentioned workbench of the belt machine, the dust hopper is fixed on the top surface of the box body, and the workbench is connected with the dust hopper through the connecting adjustment structure one.

In the workbench of the above-mentioned belt machine, the connection adjustment structure includes a connecting part that both ends of the workbench are folded down, and the two connecting parts and the dust hopper are connected by bolts and nuts. ; The axes of the bolts in the two groups of bolts and nuts are located on the same horizontal plane and coincide with the same straight line.

In the workbench of the belt sander mentioned above, two chutes corresponding to the positions of the bolts and nuts are provided on the two side walls of the dust collecting hopper, and the longitudinal line of the chute is in line with the above-mentioned plate surface as the platen. The intersecting line of the plane and the plane where the sand surface of the abrasive belt grinding section is located is perpendicular; the bolts in the bolts and nuts are embedded in the chute.

In the workbench of the above-mentioned abrasive belt machine, the rear side of the abrasive belt grinding section is provided with a grinding part for the back of the abrasive belt to lean against, and a connecting shaft is arranged on the grinding part, between the connecting shaft and the frame The two phases are connected through a connection adjustment structure that can adjust the distance between the abrasive part and the back of the abrasive belt and can fix the connection shaft on the frame.

In the workbench of the above-mentioned belt sander, the frame has a vertically arranged support rod, and the driven wheel is positioned on the support rod; the connection adjustment structure 2 includes a horizontally arranged horizontal bar and a The sliding sleeve, the longitudinal line of the cross bar is vertically set relative to the axis of the connecting shaft; one end of the cross bar is fixedly connected with the connecting shaft, and the other end is provided with a strip-shaped fixing hole along its longitudinal direction, and the fixing hole is pierced with Two fixing bolts; the sliding sleeve is threadedly connected with locking bolt 2 which can make the sliding sleeve fixedly connected to the support bar, and the cross bar is fixedly connected with the sliding sleeve through the fixing bolts. This connection adjustment structure 1 can not only adjust the distance between the abrasive part and the back of the abrasive belt by screwing the fixing bolt and pulling the cross bar; it can also adjust the distance between the abrasive part and the ground by turning the locking bolt 2 and pushing the sliding sleeve high.

In the above-mentioned workbench of the abrasive belt machine, the abrasive member includes a plate-shaped base plate, a plate surface faces the back of the abrasive belt and a wear-resistant sheet covering the above-mentioned plate surface is fixed on the base plate; the connecting shaft and the base plate The other board is fixedly connected. This grinding piece is suitable for grinding the plane of the workpiece. The wear-resistant sheet is set to prevent the abrasive belt from contacting the substrate, that is, to prevent the abrasive belt from gradually wearing the substrate. The wear-resistant sheet is more wear-resistant than the base plate, which can increase the service life of the wear-resistant parts.

In the working table of the belt sander mentioned above, both ends of the wear-resistant sheet extend around the end surface of the corresponding substrate and are fixedly connected to the other surface of the substrate by bolts. By fixing the wear-resistant sheet with bolts so that the wear-resistant part can be disassembled, the worn-out wear-resistant sheet can be removed and replaced with a new wear-resistant sheet, which further improves the service life of the worn-out part.

In the workbench of the above-mentioned belt machine, the grinding member is a cylindrical grinding wheel, which is sleeved on the connecting shaft and connected to the connecting shaft through a bearing. The grinding parts are suitable for grinding arc surface or irregular surface. When the abrasive belt is in contact with the grinding wheel, the abrasive belt drives the grinding wheel to rotate synchronously.

Compared with the prior art, when using this abrasive belt machine to process workpieces, firstly, the angle between the surface of the worktable and the grinding section of the abrasive belt is adjusted to be equal to the angle between the grinding surface of the workpiece and the positioning surface. Adapted numerically. Then the positioning surface of the workpiece is abutted against the surface of the worktable, and the workpiece is held, and gradually approaches the abrasive belt along the surface of the worktable until the back of the abrasive belt abuts against the abutment. It can be seen that the worktable has the function of assisting in positioning the workpiece, assisting in determining the angle between the grinding surface of the workpiece and the positioning surface, and guiding the feeding of the workpiece.

The workbench of the abrasive belt machine can be adjusted and fixed only by screwing the bolts and moving the corresponding parts, so it can be seen that it has the advantage of convenient adjustment.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of the workbench of the abrasive belt machine.

FIG. 2 is a schematic perspective view of the partial structure in FIG. 1 .

Fig. 3 is a structural schematic diagram of the first working state of the working table of the abrasive belt machine.

Fig. 4 is a schematic structural diagram of the second working state of the working table of the abrasive belt machine.

Fig. 5 is a structural schematic diagram of the third working state of the working table of the abrasive belt machine.

Fig. 6 is a schematic structural view of the fourth working state of the working table of the abrasive belt machine.

In the figure, 1, frame; 1a, box body; 1b, support rod; 2, motor; 3, abrasive belt; 3a, grinding section; 4, driven wheel; 5, driving wheel; 6, working table; 6a , connecting part; 7, bolt and nut; 8, chute; 9, grinding piece; 9a, substrate; 9b, wear-resistant sheet; 9c, grinding wheel; 10, connecting shaft; 11, cross bar; 12, fixing hole; 13. Fixing bolts; 14. Bearing; 15. Dust collecting bucket; 16. Workpiece.

Detailed ways

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

Embodiment one

As shown in Fig. 1, this abrasive belt machine comprises a frame 1, a motor 2, an abrasive belt 3, a driven wheel 4 and a driving wheel 5. The driven wheel 4 and the driving wheel 5 are located in the annular ring of the abrasive belt 3 and can tension the abrasive belt 3 . The driven wheel 4 is located above the driving wheel 5, the driven wheel 4 and the driving wheel 5 are positioned on the frame 1, the motor 2 is fixed on the frame 1, and the rotating shaft of the motor 2 is connected with the driving wheel 5; the abrasive belt 3 is positioned on the driven wheel A section between 4 and driving wheel 5 is the grinding section 3a.

The workbench of this belt machine is not only suitable for the above-mentioned belt machines, but also suitable for other types of belt machines. The workbench of this abrasive belt machine comprises workbench plate 6 and connection adjustment structure one. The workbench 6 is a metal plate, and the workbench 6 can be arranged horizontally. The worktable 6 is located at the front side of the grinding section 3a of the abrasive belt 3 .

The connection adjustment structure-set between the workbench 6 and the frame 1, the workbench 6 can be fixedly connected with the frame 1 through the connection adjustment structure-and the connection adjustment structure-can also adjust the position of the board surface of the workbench 6 The angle between the plane and the plane where the abrasive belt 3 grinding section 3a sand surface is located and the intersection line between the plane where the plate surface of the worktable 6 is located and the plane where the abrasive belt 3 grinding section 3a sand surface is located during adjustment Always on a level surface.

Specifically, the connection adjustment structure includes a connecting part 6a that both ends of the workbench 6 are folded down, and the two connecting parts 6a and the frame 1 are connected by bolts and nuts 7; two sets of bolts and nuts The axes of the bolts in 7 are located on the same horizontal plane and coincide with the same straight line. By screwing the bolts and nuts 7 and swinging the worktable 6, the angle between the plane where the plate surface of the workbench 6 is located and the plane where the abrasive belt 3 grinding section 3a sand surface is located can be adjusted. According to the actual situation, when the abrasive belt machine is produced, the connection adjustment structure-can be replaced by the following scheme, the connection adjustment structure-not only includes the connection part 6a that the two ends of the worktable 6 are folded down, the two connection parts 6a and The frames 1 are connected by bolts and nuts 7; the axes of the bolts in the two groups of bolts and nuts 7 are located on the same horizontal plane and coincide with the same straight line; The chute 8 provided correspondingly, the longitudinal line of the chute 8 is perpendicular to the intersection line of the plane where the plate surface of the above-mentioned platen is located and the plane where the abrasive belt 3 grinding section 3a sand surface is located; the bolts and nuts 7 are embedded In chute 8. By screwing the bolts and nuts 7, swinging the worktable 6 and pushing and pulling the worktable 6, not only the plane where the plate surface of the workbench 6 is located and the plane where the grinding section 3a of the abrasive belt 3 is located can be adjusted. The size of the angle can also adjust the distance between the worktable 6 and the abrasive belt 3.

In order to improve the stability of the processed workpiece 16 and improve the precision of the product, a grinding part 9 for the back of the abrasive belt 3 to lean against can be provided on the rear side of the grinding section 3a of the abrasive belt 3, and a connecting shaft is provided on the grinding part 9 10. The connecting shaft 10 and the frame 1 are connected by two connection adjustment structures that can adjust the distance between the abrasive part 9 and the back of the abrasive belt 3 and can fix the connecting shaft 10 on the frame 1. The connection adjustment structure 2 includes a horizontal bar 11, the longitudinal line of the bar 11 is vertically set relative to the axis of the connecting shaft 10; one end of the bar 11 is fixedly connected with the connecting shaft 10, and the other end is opened along its longitudinal There are strip-shaped fixing holes 12, and two fixing bolts 13 are pierced at the fixing holes 12, and the cross bar 11 is fixedly connected with the frame 1 through the fixing bolts 13. The second connection adjustment structure can only adjust the distance between the abrasive part 9 and the back of the abrasive belt 3 by screwing the fixing bolt 13 and pulling the cross bar 11 .

The grinding part 9 includes a plate-shaped base plate 9a, one plate face faces the back of the abrasive belt 3 and a wear-resistant sheet 9b covering the above-mentioned plate face is fixed on the base plate 9a; the connecting shaft 10 is fixedly connected to the other plate face of the base plate 9a . Both ends of the wear-resistant sheet 9b extend around the end surface of the corresponding base plate 9a and are fixedly connected with the other plate surface of the base plate 9a by bolts. According to the shape of the grinding surface of the workpiece 16, the grinding part 9 can be replaced by the following scheme. The grinding part 9 is a cylindrical grinding wheel 9c, the grinding wheel 9c is sleeved on the connecting shaft 10 and the grinding wheel 9c is connected to the connecting shaft 10 through a bearing 14 .

As shown in Figure 3, the grinding surface of the workpiece 16 is perpendicular to the positioning surface; . The plate surface of the worktable 6 is vertically arranged relative to the grinding section 3a of the abrasive belt 3 . As shown in Figure 4 again, the included angle between the grinding surface of the workpiece 16 and the positioning surface is 60 °, then the abrasive belt 3 grinding segment 3a of this belt abrasive machine can be vertically arranged, leaning on the abutment surface of the abrasive piece 9 It abuts against the back of the abrasive belt 3; the angle between the surface of the worktable 6 and the grinding section 3a of the abrasive belt 3 is also 60°. As shown in Figure 5 again, the angle between the grinding surface of the workpiece 16 and the positioning surface is 45 °, then the angle of the abrasive belt 3 grinding section 3a of this belt machine is 75 ° with respect to the horizontal plane, and the grinding parts The abutment surface of 9 is against the back of the abrasive belt 3; the angle between the surface of the workbench 6 and the horizontal plane is 30°, that is, the surface of the workbench 6 is sandwiched between the grinding section 3a of the abrasive belt 3 The angle is also 45°. As shown in Figure 6, the grinding surface of the workpiece 16 is a circular arc surface, then the grinding section 3a of the abrasive belt 3 of this belt abrasive machine can be vertically arranged, and the abutting surface of the abrasive part 9 is against the back of the abrasive belt 3 ; The workpiece 16 does not need to lean against the surface of the worktable 6; the grinding part 9 is the grinding wheel 9c.

Embodiment two

The belt machine can be replaced by the following scheme. The frame 1 of the belt machine includes a box body 1a at the bottom and a support bar 1b whose lower end is fixedly connected to the top surface of the box body 1a. The driven wheel 4 is positioned on the support bar 1b. The driving wheel 5. Positioned in the box body 1a, the top wall of the box body 1a is provided with a step-off dust collection port for the abrasive belt 3 to penetrate and for the material produced by grinding to enter the case body 1a, and a dust-collection port is fixed at the step-off dust collection port. bucket 15. Then the workbench of this abrasive belt machine is all basically the same in structure and principle compared with embodiment one, and the difference is: in the workbench of this abrasive belt machine, workbench plate 6 is arranged on the upper port of dust collecting bucket 15. The workbench 6 is connected to the dust collecting hopper 15 through the connection adjustment structure one, and the dust collecting hopper 15 is fixed on the top surface of the box body 1a. The connection adjustment structure includes the connecting part 6a that both ends of the worktable 6 are folded down, and the two connecting parts 6a and the dust collecting bucket 15 are connected by bolts and nuts 7; The axes of are located on the same horizontal plane and coincide with the same straight line. According to the actual situation, when the abrasive belt machine is produced, the connection adjustment structure-can be replaced by the following scheme, the connection adjustment structure-not only includes the connection part 6a that the two ends of the worktable 6 are folded down, the two connection parts 6a and The dust collecting hoppers 15 are all connected by bolts and nuts 7; the axes of the bolts in the two groups of bolts and nuts 7 are located on the same horizontal plane and coincide with the same straight line; The positions of the bolts and nuts 7 correspond to the chute 8 provided one by one, and the longitudinal line of the chute 8 is perpendicular to the intersection line of the plane where the above-mentioned board surface is located and the plane where the grinding section 3a sand surface of the abrasive belt 3 is located; The bolts in the nut 7 are embedded in the chute 8 .

The connection adjustment structure 2 includes a horizontally arranged crossbar 11 and a sliding sleeve sleeved on the support rod 1b. The longitudinal line of the crossbar 11 is vertically arranged relative to the axis of the connecting shaft 10; one end of the crossbar 11 is connected to the connecting shaft 10 is fixedly connected, and the other end is provided with a strip-shaped fixing hole 12 along its longitudinal direction, and two fixing bolts 13 are pierced at the fixing hole 12; the sliding sleeve is threaded to enable the sliding sleeve to be fixedly connected to the support rod 1b The locking bolt 2 on the top, the cross bar 11 is fixedly connected with the sliding sleeve through the fixing bolt 13. This connection adjustment structure can not only adjust the distance between the grinding part 9 and the back of the abrasive belt 3 by screwing the fixing bolt 13 and pulling the cross bar 11; it can also adjust the grinding part by turning the locking bolt 2 and pushing the sliding sleeve to slide 9 Height relative to the ground.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (9)

1. The workbench of a kind of abrasive belt machine, abrasive belt machine comprises frame (1), motor (2) and abrasive belt (3), is provided with a driven wheel (4) and A driving wheel (5); the driven wheel (4) is located above the driving wheel (5), the driven wheel (4) and the driving wheel (5) are all positioned on the frame (1), and the motor (2) is fixed on the frame On (1), the rotating shaft of the motor (2) is connected to the drive wheel (5); the section of the abrasive belt (3) between the driven wheel (4) and the drive wheel (5) is the grinding section (3a); its characteristics Be that, this workbench comprises the workbench (6) that is positioned at the front side of abrasive belt (3) grinding section (3a), between workbench (6) and frame (1) can adjust workbench ( 6) The angle between the plane where the plate surface is located and the plane where the sand surface of the abrasive belt (3) grinding section (3a) is located, and the plane and the sand surface of the worktable (6) when adjusting The intersecting line of the plane where the sand surface of the belt (3) grinding section (3a) is located is always connected with the connecting adjustment structure on the horizontal plane; the rear side of the grinding belt (3) grinding section (3a) is provided with a sand supply The grinding part (9) against the back of the belt (3) is provided with a connecting shaft (10) on the grinding part (9), and the grinding part can be adjusted between the connecting shaft (10) and the frame (1). (9) is connected with the two-phase connection of the connection adjustment structure with the distance between the back side of the abrasive belt (3) and the connecting shaft (10) that can be fixed on the frame (1). 2. The workbench of the belt machine according to claim 1, characterized in that, the connection adjustment structure includes a connecting portion (6a) that both ends of the workbench (6) are folded down, The two connecting parts (6a) and the frame (1) are connected by bolts and nuts (7); the axes of the bolts in the two groups of bolts and nuts (7) are located on the same horizontal plane and coincide with the same straight line. 3. The workbench of the abrasive belt machine according to claim 2, characterized in that, the frame (1) is provided with two chutes (8) corresponding to the positions of the bolts and nuts (7). , the longitudinal line of the chute (8) is perpendicular to the intersection line of the plane where the plate surface of the above-mentioned workbench (6) is located and the plane where the sand surface of the abrasive belt (3) grinding section (3a) is located; the bolt and nut (7 ) middle bolt is embedded in the chute (8). 4. The workbench of the abrasive belt machine according to claim 1, characterized in that, said frame (1) comprises a box body (1a) at the bottom and a box body (1a) whose lower end is fixed on the top surface of the box body (1a). The supporting rod (1b), the driven wheel (4) is positioned on the supporting rod (1b), the driving wheel (5) is positioned in the box (1a), and the top wall of the box (1a) is provided with an abrasive belt (3) The material produced by the threading and grinding enters the dust collecting port of the box body (1a), and the dust collecting port (15) is fixed at the dust collecting port, and the working table (6) is arranged on the dust collecting hopper (15 ) at the upper port. 5. The workbench of the abrasive belt machine according to claim 4, characterized in that, the dust collecting bucket (15) is fixed on the top surface of the box body (1a), and the workbench (6) is adjusted by connecting Structure one is connected with the dust collecting bucket (15). 6. The workbench of the abrasive belt machine according to claim 5, characterized in that, the connection adjustment structure includes a connecting portion (6a) in which both ends of the workbench (6) are folded down, The two connecting parts (6a) and the dust collecting bucket (15) are connected by bolts and nuts (7); the axes of the bolts in the two sets of bolts and nuts (7) are located on the same horizontal plane and coincide with the same straight line. 7. The workbench of the abrasive belt machine according to claim 6, characterized in that two sidewalls of the dust collecting hopper (15) are provided with two corresponding to the positions of the bolts and nuts (7). The chute (8), the longitudinal line of the chute (8) is perpendicular to the intersection line of the plane where the plate surface of the above-mentioned worktable (6) is located and the plane where the sand surface of the abrasive belt (3) grinding section (3a) is located ; The bolts in the bolt nuts (7) are embedded in the chute (8). 8. The workbench of the belt sander according to any one of claims 1 to 7, characterized in that, the frame (1) has a vertically arranged support bar (1b), and the driven wheel (4 ) is positioned on the support bar (1b); the connection adjustment structure two includes a horizontally arranged cross bar (11) and a sliding sleeve sleeved on the support bar (1b), and the longitudinal line of the cross bar (11) is relative to the connection The shaft center of the shaft (10) is arranged vertically; one end of the cross bar (11) is fixedly connected with the connecting shaft (10), and the other end is provided with a strip-shaped fixing hole (12) along its longitudinal direction, and the fixing hole (12) is Two fixing bolts (13) are pierced; the sliding sleeve is threadedly connected with locking bolt 2 which can make the sliding sleeve fixedly connected to the support bar (1b), and the cross bar (11) is connected with the sliding sleeve through the fixing bolt (13). set of fixed connections. 9. The workbench of an abrasive belt machine according to any one of claims 1 to 7, characterized in that, said grinding member (9) comprises a plate-shaped base plate (9a), a plate surface Facing the back of the abrasive belt (3) and the base plate (9a) is fixed with a wear-resistant sheet (9b) covering the above-mentioned plate surface; the connecting shaft (10) is fixedly connected with the other plate surface of the base plate (9a); The grinding part (9) is a cylindrical grinding wheel (9c), which is sleeved on the connecting shaft (10) and connected to the connecting shaft (10) through a bearing (14). .