CN216265186U

CN216265186U - Abrasive belt machine with abrasive belt capable of being replaced rapidly and provided with abrasive belt disc

Info

Publication number: CN216265186U
Application number: CN202122633767.6U
Authority: CN
Inventors: 孙高前; 杨兆国; 戴昊
Original assignee: Yancheng Baoding Power Tools Co ltd
Current assignee: Yancheng Baoding Power Tools Co ltd
Priority date: 2021-10-31
Filing date: 2021-10-31
Publication date: 2022-04-12
Anticipated expiration: 2031-10-31

Abstract

The utility model discloses an abrasive belt machine with an abrasive belt conveniently replaced, and relates to the technical field of abrasive belt machines with abrasive belts. The utility model comprises a base, wherein the top of the base is fixedly connected with a shell, the bottom surface in the shell is fixedly provided with a transmission mechanism, a first rotating shaft and a second rotating shaft are movably arranged above the transmission mechanism, the peripheral side surface of the first rotating shaft is movably connected with one end of an abrasive belt, and the other end of the abrasive belt is movably connected with the peripheral side surface of the second rotating shaft; the tensioning assembly is fixedly arranged above the transmission mechanism, the adjusting assemblies are fixedly arranged on two opposite sides of the tensioning assembly, and the adjusting assemblies are fixedly arranged on two opposite inner side walls of the shell. The utility model can adapt to various types of abrasive belts by arranging the tensioning assembly and the adjusting assembly so as to meet the processing requirements, has wide application range, and meets the processing requirements of various types of materials by adjusting the distance between the abrasive belt and the transmission belt.

Description

Abrasive belt machine with abrasive belt capable of being replaced rapidly and provided with abrasive belt disc

Technical Field

The utility model belongs to the technical field of abrasive belt machines, and particularly relates to an abrasive belt machine with an abrasive belt capable of being replaced quickly.

Background

The prior abrasive belt machine and the prior abrasive disc machine are two independent machine tools which have polishing and grinding functions. The abrasive belt machine is generally provided with a driving wheel and a driven wheel, and two wheels are connected through an abrasive belt to rotate, so that a workpiece is polished and ground on the abrasive belt; the abrasive disc machine is usually a motor driving a disc to make a rotary motion, the end face of the disc is pasted with abrasive paper, and a workpiece is polished and ground through the rotation of the abrasive paper. With the development of the use requirements and the progress of the technology, a small abrasive belt and abrasive disc machine integrating the abrasive belt function and the abrasive disc function is widely applied.

The driving wheel and the driven wheel in the existing abrasive belt machine with the abrasive belt are fixed on the device, the abrasive belt, the driving wheel and the driven wheel are mutually matched, when various types of abrasive belts need to be replaced so as to meet processing requirements, the abrasive belt is not matched with the driving wheel and the driven wheel, the abrasive belt is easy to loosen and loose, the application range is limited, the distance between the abrasive belt and the transmission belt is fixed, and various types of material processing requirements cannot be met, so that the abrasive belt machine with the abrasive belt convenient to replace quickly is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a sand table belt sander convenient for quickly replacing an abrasive belt, and solves the problems that in the existing sand table belt sander, a driving wheel and a driven wheel are fixed on a device, the abrasive belt, the driving wheel and the driven wheel are mutually matched, when various types of abrasive belts need to be replaced so as to meet processing requirements, the abrasive belt, the driving wheel and the driven wheel are not matched, the abrasive belt is easy to loosen and limited in application range, and the distance between the abrasive belt and the transmission belt is fixed so as not to meet the processing requirements of various types of materials.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to an abrasive belt machine with an abrasive belt conveniently replaced, which comprises a base, wherein the top of the base is fixedly connected with a casing, the bottom surface inside the casing is fixedly provided with a transmission mechanism, a first rotating shaft and a second rotating shaft are movably arranged above the transmission mechanism, the peripheral side surface of the first rotating shaft is movably connected with one end of the abrasive belt, and the other end of the abrasive belt is movably connected with the peripheral side surface of the second rotating shaft; a tensioning assembly is fixedly arranged above the transmission mechanism, adjusting assemblies are fixedly arranged on two opposite sides of the tensioning assembly, and the adjusting assemblies are fixedly arranged on two opposite inner side walls of the shell;

the tensioning assembly comprises a movable rod, a first rotating rod, first conical teeth, second conical teeth, a first screw and a sleeve, wherein the movable rod is movably arranged on two opposite sides in the shell, a first bearing seat and a second bearing seat are fixedly connected to the inner parts of the two opposite sides of the movable rod respectively, two opposite ends of the first rotating shaft penetrate through the movable rod and are movably connected to a first bearing in the first bearing seat, two opposite ends of the second rotating shaft penetrate through the movable rod and are movably connected to a second bearing in the second bearing seat, one side of the movable rod, far away from the first rotating shaft and the second rotating shaft, is movably connected with the first rotating rod, one end of the first rotating rod extends into the inner part of the movable rod and is fixedly connected with the first conical teeth, one side of the first conical teeth is movably connected with the second conical teeth, the second conical teeth are mutually meshed with the first conical teeth, one end of the second conical teeth, far away from the first conical teeth, is fixedly connected with the first screw, the peripheral side surface of the first screw rod is movably connected with a sleeve, one end of the sleeve, far away from the first screw rod, penetrates through one side surface of the movable rod and is movably connected to the peripheral side surface of the first bearing seat, and two ends of the first rotating rod penetrate through two opposite side walls of the shell and are fixedly connected with a first handle;

the adjusting component comprises a second rotating rod, a third conical tooth, a fourth conical tooth, a second screw rod, a sliding block and a movable block, wherein the second rotating rod is movably arranged on two opposite outer side walls of the casing, the adjacent end of the second rotating rod penetrates through the outer side wall of the casing and the fixedly connected third conical tooth, the bottom of one side of the third conical tooth is movably connected with the fourth conical tooth, the inside of the fourth conical tooth is movably connected with the second screw rod, the second screw rod penetrates through the fourth conical tooth and the circumferential side face and is movably connected with the sliding block, the sliding block is far away from the inside of one end face of the second screw rod and is movably connected with the movable block, the first bearing seat is fixedly connected onto the movable block, the second rotating rod rotates to drive the third conical tooth to move, and two ends of the second rotating rod penetrate through two opposite side walls of the casing and is fixedly connected with a second handle.

Preferably, there is one end of the support rod at the bottom of the second bearing seat, there is a mounting plate fixedly connected to the other end of the support rod, there are two opposite sides of the mounting plate fixedly connected to the inner side wall of the casing, there is a support plate fixedly connected to the outer wall of the casing, there is a motor fixedly connected to the top of the support plate, and the second rotating shaft penetrates through the second bearing seat and one side wall of the casing and is fixedly connected to the output end of the motor.

Preferably, a first mounting groove is formed in one side of the inside of the movable rod, a fixing plate is fixedly connected to two opposite sides of the inside of the first mounting groove, the first screw rod penetrates through the fixing plate and is movably arranged inside the first mounting groove, two fourth bearings are movably connected to the side faces of the first screw rod, and outer side walls of the two fourth bearings are fixedly connected to the inside of the fixing plate.

Preferably, a first movable groove is formed in the sleeve, an internal thread is fixedly connected to the side wall of the first movable groove, the internal thread is matched with an external thread arranged on the peripheral side face of the first screw, and the first screw rotates to drive the sleeve to move along the first screw.

Preferably, the relative both sides fixedly connected with slide of sleeve one end week side, the spout has been seted up on the relative both sides wall of first mounting groove, the slide activity sets up inside the spout, and the inside slide activity that supplies of spout just plays limiting displacement to it.

Preferably, the second mounting groove has all been seted up on the relative two inside walls of casing, the equal swing joint in both ends has the third bearing about the second screw rod, two the third bearing is fixed connection respectively on two cell walls about the second mounting groove, the inside second screw rod that supplies activity of second mounting groove.

Preferably, the slider is kept away from and is seted up the second movable groove on the second screw rod terminal surface, the movable block activity sets up in the second movable inslot portion, fixedly connected with telescopic link one end on the second movable groove lateral wall, telescopic link other end fixed connection is on the movable block, telescopic link one end fixedly connected with spring one end, and spring other end fixed connection is on the movable block.

Preferably, the movable block is far away from the connecting plate fixedly connected with two opposite sides of one end of the second screw rod, one end of the connecting plate is provided with a plurality of first threaded through holes, one end face of the sliding block is provided with a plurality of second threaded through holes, the inner diameters of the first threaded through holes and the second threaded through holes are the same, and therefore bolts are sequentially inserted into the first threaded through holes and the second threaded through holes to fixedly connect the movable block on the sliding block.

The utility model has the following beneficial effects:

1. the utility model can adapt to various types of abrasive belts by arranging the tensioning assembly so as to meet the processing requirements, the first rotating rod is driven to rotate by rotating the first handle so as to drive the first conical tooth to move and the second conical tooth to move so as to drive the first screw rod to rotate, so that the sleeve moves along the direction of the first screw rod and drives the first rotating shaft arranged between the first bearing seats to move, the first bearing seats drive the movable block to move in the second movable groove so as to adjust the tensioning degree of the abrasive belt, and after the abrasive belt is adjusted to a proper position, the bolts are sequentially inserted into the first threaded through hole of the connecting plate and the second threaded through hole of the sliding block so as to fixedly connect the movable block to the sliding block, so that the abrasive belt cannot be loosened, and the application range is wide;

2. according to the utility model, the distance between the abrasive belt and the transmission belt can be adjusted by arranging the adjusting component, the second rotating rod is driven to rotate by rotating the second handle, so that the third conical tooth is driven to move, the fourth conical tooth is driven to move, the second screw rod is driven to rotate, so that the sliding block is driven to move up and down, the first bearing seat is driven to rotate by taking the second bearing seat as a center, the distance between the abrasive belt and the transmission belt is changed, and the processing requirements of various materials are met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of an abrasive belt sander for facilitating quick change of the sanding belt in accordance with the present invention;

FIG. 2 is a top view of an abrasive disc belt machine of the present invention facilitating quick change of the abrasive belt;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2 of an abrasive belt machine for a disc of the present invention to facilitate quick change of an abrasive belt;

FIG. 4 is an enlarged view of a portion of the belt sander at point B in FIG. 3, illustrating a belt sander with an abrasive belt being quickly replaced according to the present invention;

FIG. 5 is an enlarged view of a portion of the abrasive belt machine of the abrasive disc of FIG. 3 at C for facilitating quick change of the abrasive belt in accordance with the present invention;

FIG. 6 is a cross-sectional view taken at D-D of FIG. 2 of an abrasive belt machine for a disc of the present invention to facilitate quick change of an abrasive belt;

fig. 7 is an enlarged view of a portion E of fig. 6 of an abrasive belt machine for an abrasive disc facilitating quick change of an abrasive belt according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a base; 2. a housing; 3. a first rotating shaft; 4. a second rotating shaft; 5. an abrasive belt; 6. a movable rod; 7. a first rotating lever; 8. a first conical tooth; 9. a second tapered tooth; 10. a first screw; 11. a sleeve; 12. a second rotating rod; 13. a third tapered tooth; 14. a fourth conical tooth; 15. a second screw; 16. a slider; 17. a movable block; 18. a support bar; 19. mounting a plate; 20. a first mounting groove; 21. a fixing plate; 22. a first movable slot; 23. a slide plate; 24. a chute; 25. a second mounting groove; 26. a second movable slot; 27. a telescopic rod; 28. a connecting plate; 29. a first handle; 30. a second handle; 31. a support plate; 32. a motor; 33. a spring.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-7, the utility model is an abrasive belt machine of an abrasive belt for rapidly replacing abrasive belt, comprising a base 1, wherein the top of the base 1 is fixedly connected with a casing 2, the bottom surface inside the casing 2 is fixedly provided with a transmission mechanism, a first rotating shaft 3 and a second rotating shaft 4 are movably arranged above the transmission mechanism, the peripheral side surface of the first rotating shaft 3 is movably connected with one end of an abrasive belt 5, and the other end of the abrasive belt 5 is movably connected with the peripheral side surface of the second rotating shaft 4; a tensioning assembly is fixedly arranged above the transmission mechanism, adjusting assemblies are fixedly arranged on two opposite sides of the tensioning assembly, and the adjusting assemblies are fixedly arranged on two opposite inner side walls of the shell 2;

the tensioning assembly comprises a movable rod 6, a first rotating rod 7, a first conical tooth 8, a second conical tooth 9, a first screw rod 10 and a sleeve 11, the movable rod 6 is movably arranged on two opposite sides in the shell 2, a first bearing seat and a second bearing seat are respectively and fixedly connected in the two opposite sides of the movable rod 6, two opposite ends of the first rotating shaft 3 penetrate through the movable rod 6 and are movably connected on a first bearing in the first bearing seat, two opposite ends of the second rotating shaft 4 penetrate through the movable rod 6 and are movably connected on a second bearing in the second bearing seat, one side of the movable rod 6, far away from the first rotating shaft 3, one side of the second rotating shaft 4 is movably connected with the first rotating rod 7, one end of the first rotating rod 7 extends into the movable rod 6 and is fixedly connected with the first conical tooth 8, one side of the first conical tooth 8 is movably connected with the second conical tooth 9, the second conical tooth 9 is mutually meshed with the first conical tooth 8, one end, far away from the first conical tooth 8, of the second conical tooth 9 is fixedly connected with a first screw rod 10, the peripheral side face of the first screw rod 10 is movably connected with a sleeve 11, one end, far away from the first screw rod 10, of the sleeve 11 penetrates through one side face of the movable rod 6 and is movably connected to the peripheral side face of the first bearing seat, two ends of the first rotating rod 7 penetrate through two opposite side walls of the shell 2 and is fixedly connected with a first handle 29, and the first rotating rod 7 is driven to rotate by rotating the first handle 29, so that the first conical tooth 8 is driven to move, and the second conical tooth 9 is driven to move, so that the first screw rod 10 is driven to rotate;

the adjusting component comprises a second rotating rod 12, a third conical tooth 13, a fourth conical tooth 14, a second screw rod 15, a sliding block 16 and a movable block 17, the second rotating rod 12 is movably arranged on two opposite outer side walls of the machine shell 2, one end of the second rotating rod 12 adjacent to the second rotating rod penetrates through the outer side wall of the machine shell 2 and is fixedly connected with the third conical tooth 13, the bottom of one side of the third conical tooth 13 is movably connected with the fourth conical tooth 14, the second screw rod 15 is movably connected with the second screw rod 14 inside, the second screw rod 15 penetrates through the fourth conical tooth 14 and is movably connected with the sliding block 16 on the peripheral side surface, the sliding block 16 is movably connected with the movable block 17 inside one end surface far away from the second screw rod 15, a first shaft is fixedly connected with the movable block 17, the second rotating rod 12 rotates to drive the third conical tooth 13 to move, two ends of the second rotating rod 12 penetrate through the machine shell 2 and are fixedly connected with a second handle 30, the second handle 30 rotates to drive the fourth conical tooth 14 to move, thereby driving the second screw rod 15 to rotate, and enabling the sliding block 16 to move on the second screw rod 15.

Wherein, second bearing frame bottom swing joint has 18 one ends of bracing piece, 18 other ends fixedly connected with mounting panel 19 of bracing piece, the relative both sides difference fixed connection of mounting panel 19 is on casing 2 inside wall, fixedly connected with backup pad 31 on the casing 2 outer wall, backup pad 31 top fixedly connected with motor 32, second pivot 4 runs through second bearing frame and 2 lateral walls of casing and fixed connection on motor 32 output, motor 32 output drives second pivot 4 and rotates, thereby drive abrasive band 5 and rotate, abrasive band 5 drives first pivot 3 and rotates.

Wherein, first mounting groove 20 has been seted up to inside one side of movable rod 6, the inside relative both sides fixedly connected with fixed plate 21 of first mounting groove 20, and first screw rod 10 runs through fixed plate 21 activity and sets up inside first mounting groove 20, and first screw rod 10 week side swing joint has two fourth bearings, and two fourth bearing lateral walls fixed connection are inside fixed plate 21.

Wherein, sleeve 11 is inside to be seted up first movable groove 22, and fixed connection has the internal thread on the 22 lateral walls in first movable groove, and the external screw thread looks adaptation that the internal thread and the first screw rod 10 week side were equipped with, and first screw rod 10 rotates and drives sleeve 11 and follow first screw rod 10 activity.

Wherein, the relative both sides fixedly connected with slide 23 of the peripheral side of one end of sleeve 11, has seted up spout 24 on the relative both sides wall of first mounting groove 20, and slide 23 activity sets up inside spout 24, and the inside slide 23 activity that supplies of spout 24 just plays limiting displacement to it.

Wherein, the second mounting groove 25 has all been seted up on two relative inside walls of casing 2, and the equal swing joint in both ends has the third bearing about the second screw rod 15, and two third bearings are fixed connection respectively on two cell walls about second mounting groove 25, and the inside second screw rod 15 that supplies of second mounting groove 25 moves about.

Wherein, slider 16 is kept away from and has been seted up second movable groove 26 on the 15 terminal surface of second screw rod, the activity of movable block 17 sets up inside second movable groove 26, fixedly connected with telescopic link 27 one end on the 26 lateral walls in second movable groove, telescopic link 27 other end fixed connection is on movable block 17, telescopic link 27 one end fixedly connected with spring 33 one end, spring 33 other end fixed connection is on movable block 17, spring 33 and the cooperation of telescopic link 27 play the cushioning effect to movable block 17.

Wherein, the relative both sides fixedly connected with connecting plate 28 of second screw rod 15 one end is kept away from to movable block 17, and a plurality of first screw thread through-holes have been seted up to connecting plate 28 one end, have seted up a plurality of second screw thread through-holes on the 16 terminal surfaces of slider, and first screw thread through-hole is the same with second screw thread through-hole internal diameter, thereby insert first screw thread through-hole and second screw thread through-hole with the bolt in proper order with movable block 17 fixed connection on slider 16.

When a person uses the abrasive belt, after the abrasive belt 5 is replaced, firstly, the first handle 29 is rotated, the first rotating rod 7 is rotated to drive the first conical teeth 8 to move, the second conical teeth 9 to move, the first screw rod 10 is driven to rotate, the sleeve 11 moves along the direction of the first screw rod 10, the first rotating shaft 3 arranged between the first bearing seats is driven to move, the first bearing seats drive the movable block 17 to move in the second movable groove 26, so that the tension degree of the abrasive belt 5 is adjusted, and after the abrasive belt is adjusted to a proper position, bolts are sequentially inserted into the first threaded through hole of the connecting plate 28 and the second threaded through hole of the sliding block 16, so that the movable block 17 is fixedly connected to the sliding block 16, the abrasive belt 5 cannot be loosened, and the application range is wide; when different types of materials are processed, the second handle 30 is rotated, the second handle 30 drives the second rotating rod 12 to rotate, the second rotating rod 12 drives the third conical tooth 13 to move, the third conical tooth 13 drives the fourth conical tooth 14 to move, the fourth conical tooth 14 drives the second screw 15 to rotate, the second screw 15 rotates to drive the sliding block 16 to move up and down, the first bearing seat is driven to rotate by taking the second bearing seat as a center, the distance between the abrasive belt 5 and a conveying belt is changed, and the processing requirements of various types of materials are met.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an abrasive band machine convenient to quick replacement abrasive band, includes base (1), its characterized in that: the top of the base (1) is fixedly connected with a casing (2), the bottom surface inside the casing (2) is fixedly provided with a transmission mechanism, a first rotating shaft (3) and a second rotating shaft (4) are movably arranged above the transmission mechanism, the peripheral side surface of the first rotating shaft (3) is movably connected with one end of an abrasive belt (5), and the other end of the abrasive belt (5) is movably connected with the peripheral side surface of the second rotating shaft (4); a tensioning assembly is fixedly arranged above the transmission mechanism, adjusting assemblies are fixedly arranged on two opposite sides of the tensioning assembly, and the adjusting assemblies are fixedly arranged on two opposite inner side walls of the shell (2);

the tensioning assembly comprises a movable rod (6), a first rotating rod (7), first conical teeth (8), second conical teeth (9), a first screw rod (10) and a sleeve (11), wherein the movable rod (6) is movably arranged on two opposite sides in the shell (2), a first bearing seat and a second bearing seat are fixedly connected to the inner parts of the two opposite sides of the movable rod (6) respectively, two opposite ends of a first rotating shaft (3) penetrate through the movable rod (6) and are movably connected to a first bearing in the first bearing seat, two opposite ends of a second rotating shaft (4) penetrate through the movable rod (6) and are movably connected to a second bearing in the second bearing seat, one side of the movable rod (6) far away from the first rotating shaft (3) and the second rotating shaft (4) is movably connected with the first rotating rod (7), one end of the first rotating rod (7) extends to the inner part of the movable rod (6) and is fixedly connected with the first conical teeth (8), one side of the first conical tooth (8) is movably connected with a second conical tooth (9), the second conical tooth (9) is meshed with the first conical tooth (8), one end, far away from the first conical tooth (8), of the second conical tooth (9) is fixedly connected with a first screw rod (10), the peripheral side face of the first screw rod (10) is movably connected with a sleeve (11), one end, far away from the first screw rod (10), of the sleeve (11) penetrates through one side face of the movable rod (6) and is movably connected to the peripheral side face of the first bearing seat;

the adjusting component comprises a second rotating rod (12), a third conical tooth (13), a fourth conical tooth (14), a second screw rod (15), a sliding block (16) and a movable block (17), the second rotating rods (12) are movably arranged on two opposite outer side walls of the machine shell (2), one end of the second rotating rod (12) adjacent to the first rotating rod penetrates through the outer side wall of the machine shell (2) and is fixedly connected with a third conical tooth (13), the bottom of one side of the third conical tooth (13) is movably connected with a fourth conical tooth (14), a second screw (15) is movably connected inside the fourth conical tooth (14), the second screw (15) penetrates through the fourth conical tooth (14) and the peripheral side surface is movably connected with a slide block (16), the inner portion of one end face, away from the second screw rod (15), of the sliding block (16) is movably connected with a movable block (17), and the first bearing seat is fixedly connected to the movable block (17).

2. The belt sander for facilitating quick change of sanding belt according to claim 1, wherein one end of the supporting rod (18) is movably connected to the bottom of the second bearing seat, the other end of the supporting rod (18) is fixedly connected to the mounting plate (19), and two opposite sides of the mounting plate (19) are respectively and fixedly connected to the inner side wall of the casing (2).

3. The belt sander convenient for quick abrasive belt replacement of claim 2, wherein a first mounting groove (20) is formed in one side of the interior of the movable rod (6), fixing plates (21) are fixedly connected to two opposite sides of the interior of the first mounting groove (20), and the first screw (10) is movably arranged in the first mounting groove (20) through the fixing plates (21).

4. The belt sander capable of rapidly replacing an abrasive belt conveniently according to claim 3, wherein a first movable groove (22) is formed in the sleeve (11), an internal thread is fixedly connected to the side wall of the first movable groove (22), and the internal thread is matched with an external thread formed on the peripheral side surface of the first screw (10).

5. An abrasive belt machine for rapidly replacing abrasive belts as claimed in claim 4, wherein a sliding plate (23) is fixedly connected to one end of the sleeve (11) on the opposite sides of the circumferential surface, sliding grooves (24) are formed on the opposite side walls of the first mounting groove (20), and the sliding plate (23) is movably arranged inside the sliding grooves (24).

6. The belt sander capable of rapidly replacing an abrasive belt conveniently according to claim 1, wherein a second mounting groove (25) is formed on each of two opposite inner side walls of the housing (2), third bearings are movably connected to the upper and lower ends of the second screw (15), and the two third bearings are fixedly connected to the upper and lower groove walls of the second mounting groove (25), respectively.

7. The belt sander convenient for quick abrasive belt replacement of claim 6, wherein a second movable groove (26) is formed in an end surface of the sliding block (16) away from the second screw (15), the movable block (17) is movably arranged in the second movable groove (26), one end of a telescopic rod (27) is fixedly connected to one side wall of the second movable groove (26), and the other end of the telescopic rod (27) is fixedly connected to the movable block (17).

8. The belt sander convenient for quick abrasive belt replacement of claim 7, wherein the movable block (17) is fixedly connected with a connecting plate (28) at the end far away from the second screw (15) and at the opposite sides, one end of the connecting plate (28) is provided with a plurality of first threaded through holes, one end surface of the sliding block (16) is provided with a plurality of second threaded through holes, and the first threaded through holes and the second threaded through holes have the same inner diameter.