CN114083405B - Multipurpose polisher - Google Patents

Abstract

The invention relates to the field of polishing equipment, and particularly discloses a multipurpose polishing machine, which comprises: the device comprises a seat plate, a driving roller, a driven roller, a clamping block, a supporting plate component with a supporting plate, a power box, a sliding frame, a push rod with an inclined end face, a driving device and a push rod seat with an inclined bottom face. The polishing machine is provided with the driving roller and the driven roller which are arranged in a triangular shape in the polishing machine to drive the polishing belt to polish, the working area of the polishing belt is provided with the relief opening, the polishing machine not only can be suitable for polishing plane workpieces, but also can be suitable for polishing curved workpieces, the telescopic supporting plate component can be used for supporting the polishing belt when the grinding machine polishes planes, so that the polishing effect is improved, two polishing modes of strong polishing and common polishing are realized by changing the connecting position of the driving device, and the ejector rod can apply vertical pulse pressure to the supporting plate when in strong polishing, so that the polishing efficiency is improved, and the polishing quality is improved.

Description

Multipurpose polisher

Technical Field

The invention belongs to the field of polishing equipment, and particularly relates to a multipurpose polishing machine.

Background

The polisher is the instrument that the rate of utilization is very high, and in the electrician field, pincers worker field, a plurality of fields such as machining can be used often, and the kind of polisher has a lot, and there is the horned mill, flat grinding machine etc. and the consumptive material of polishing also divide into emery wheel, abrasive band, abrasive paper etc. can choose for use according to the occasion of difference.

However, in some occasions of field equipment installation and maintenance, a flat-plate-shaped, arc-shaped and tubular workpiece needs to be temporarily polished, and due to the poor universality of the polisher, various polishing equipment needs to be carried, which is extremely inconvenient; in addition, when the electric grinding machine is used for field operation, the problem that the electric power is difficult to be supplied to the electric grinding machine often exists due to various operation places and conditions; if the traditional portable polisher is adopted, when some severely rusted or relatively thick polishing layers are polished, the required polishing effect cannot be achieved, and the polishing efficiency is relatively low.

The above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.

Disclosure of Invention

The invention aims to provide a multipurpose polisher, so that the defects of poor universality, low polishing efficiency and poor polishing effect of the conventional portable polisher are overcome.

To achieve the above object, the present invention provides a multipurpose sander comprising: the seat plate comprises a first side surface and a second side surface which are opposite, a driving roller and two driven rollers are arranged on the first side surface, abrasive belts are wound on the driving roller and the driven rollers, a position-giving opening is formed in one end of the seat plate, and the position-giving opening is located between the two driven rollers; the support plate component comprises a telescopic block, one end of the telescopic block is arranged in the seat plate in a sliding mode, the other end of the telescopic block extends outwards from the abdicating opening, a support plate is arranged at the other end of the telescopic block, one end of the support plate extends to the inner side of the abrasive belt and is parallel to the abrasive belt, and the other end of the support plate extends outwards from the second side face; the power box is fixedly arranged on the second side face, a sliding cavity is arranged in the power box, two ends of the sliding cavity respectively extend outwards from two ends of the sliding cavity to form a first cavity opening and a second cavity opening, the first cavity opening is close to the supporting plate, a first power input shaft and a power output shaft are arranged on two sides of the power box, the power output shaft is connected with the driving roller, and when the first power input shaft rotates, the power output shaft can be driven to synchronously rotate; the sliding frame is arranged in the sliding cavity in a slidable mode and comprises a first end and a second end which are opposite, the first end can extend out of the first cavity opening, the second end can extend out of the second cavity opening, a push rod is arranged at the first end, the end part of the push rod is perpendicular to the supporting plate and is provided with an inclined end face, an included angle smaller than 90 degrees is formed between the inclined end face and the axis of the push rod, a second power input shaft is arranged at the second end, and when the second power input shaft rotates, the power output shaft and the push rod can be driven to synchronously rotate at the same time; drive arrangement, it includes driving motor, driving motor's output is equipped with the power connector, the power connector can respectively with first power input shaft with the connection can be dismantled to second power input shaft, and can drive respectively first power input shaft with second power input shaft rotates, driving motor's lateral part is equipped with grips the handle, be equipped with battery pack in the handle, the lateral part of handle is equipped with switch.

Preferably, among the above-mentioned technical scheme, the periphery of first power input shaft is equipped with first fixed cover, the periphery of second power input shaft is equipped with the fixed cover of second, the periphery of power connector is equipped with the plug bush, the plug bush can with first fixed cover with the fixed cover fixed connection of second.

Preferably, in the above technical solution, one of the driven rollers is an elastic roller, and when the elastic roller is subjected to an external force, the elastic roller can approach to the other driven roller, and when the elastic roller is in a free state, the elastic roller can automatically move away from the other driven roller.

Preferably, among the above-mentioned technical scheme, first spout has been seted up to the first side, be equipped with the slider in the first spout, driven drum locates with rotatable mode on the slider, the one end of first spout with the mouth of stepping down is close to each other, the other end of first spout with the mouth of stepping down is kept away from each other the one end of first spout with be equipped with first spring between the slider.

Preferably, in the above technical solution, the supporting plate is perpendicular to the telescopic block, the middle of the supporting plate is hinged to the other end of the telescopic block, and a torsion spring is disposed at the hinged position to keep the supporting plate and the telescopic block in a perpendicular state all the time.

Preferably, in the above technical scheme, a second chute is formed in the bottom of the clearance opening, the telescopic block is slidably disposed in the second chute, and a plurality of first latches are disposed on one side of the telescopic block facing the first side surface.

Preferably, in the above technical scheme, a clamping block groove is formed in the first side face, the clamping block groove and the second sliding groove are communicated with each other and perpendicular to each other, a slidable clamping block is arranged in the clamping block groove, a second spring is arranged between the clamping block and the seat plate, the second spring can drive the clamping block and the telescopic block to be close to each other, a second clamping tooth matched with the first clamping tooth is arranged on the clamping block, a handle is arranged on one side of the clamping block, which is far away from the second clamping tooth, and when the second clamping tooth and the first clamping tooth are mutually engaged, the telescopic block can be limited to slide in the second sliding groove.

Preferably, in the above technical scheme, a first bevel gear, a second bevel gear and a third bevel gear which are matched with each other are arranged in the power box, the first bevel gear is coaxially connected with the power output shaft, the second bevel gear is coaxially connected with the first power input shaft, a certain distance is provided between the first bevel gear and the second bevel gear, and axes of the first bevel gear and the second bevel gear are coincident with each other; the power box is characterized in that a first fixing seat and a second fixing seat are further arranged in the power box, a third bevel gear is rotatably arranged on the first fixing seat and located between the first bevel gear and the second bevel gear, the axis of the third bevel gear is perpendicular to the axis of the first bevel gear and the axis of the second bevel gear, and a spline hole is formed in the center of the third bevel gear.

Preferably, in the above technical scheme, a rotatable spline shaft is arranged in the sliding frame, the spline shaft slidably passes through the spline hole, a spline matched with the spline hole is arranged on the outer side of the spline shaft, one end of the spline shaft is coaxially connected with the second power input shaft, the other end of the spline shaft passes through the second fixing seat and is coaxially connected with the push rod, a retaining ring is fixedly arranged on the spline shaft, and a third spring is arranged between the retaining ring and the second fixing seat.

Preferably, among the above-mentioned technical scheme, be equipped with outside convex push rod seat in the backup pad, the push rod groove has been seted up on the push rod seat, the tip of push rod can insert to the push rod inslot, the bottom in push rod groove is equipped with oblique bottom surface, the inclination of oblique bottom surface with the inclination of oblique terminal surface is unanimous.

Compared with the prior art, the invention has the following beneficial effects:

1. the multipurpose polisher drives the polishing belt to polish through the driving roller and the driven roller which are arranged in a triangular mode, the working area of the polishing belt is provided with the relief opening, the multipurpose polisher is suitable for polishing plane workpieces and curved surface workpieces, the telescopic supporting plate assembly can support the polishing belt when the grinding belt polishes the plane, polishing effects are improved, two polishing modes of powerful polishing and common polishing are achieved by changing the connecting position of the driving device, and the ejector rod can apply vertical pulse pressure to the supporting plate when the grinding belt is polished in a powerful mode, so that polishing efficiency is improved, and polishing quality is improved.

2. The supporting plate assembly has two functions, when the supporting plate is put down and is in contact with the grinding belt, and the power connector is connected with the first power input shaft, the supporting plate only plays a supporting role, so that the equipment can be more uniformly ground on a plane; when the backup pad is put down and is contacted with the dull polish area, when power connector and second power input shaft were connected, need promote the carriage downwards during polishing to can the drive push rod downstream, thereby provide a vertically continuous pulse power to the department of polishing, promoted the efficiency of polishing.

3. The vertical pulse force is realized by inserting the push rod with the inclined end face into the push rod groove provided with the inclined bottom face, and when the push rod rotates, the inclined end face and the inclined bottom face can be staggered with each other, so that a continuous vertical pulse force can be provided for the second end of the support plate.

4. The driven roller is internally provided with the elastic roller capable of moving transversely, the sanding belt can be conveniently replaced in the using process, the sanding belt can be replaced only by pushing the elastic roller during replacement, and an additional tool is not needed for dismounting.

5. The telescopic block can be stretched by driving the supporting plate, and the sliding of the telescopic block in the second sliding groove can be automatically limited by the clamping block, so that the telescopic block is convenient and quick to use.

6. The peripheries of the first power input shaft and the second power input shaft are respectively provided with the fixed sleeve, and the periphery of the power connector is provided with the inserting sleeves matched with the power connector, so that the effect of enhancing the connection strength of the power device can be achieved, and the connection part can be conveniently detached.

7. According to the invention, the transmission gear in the power box is provided with the spline hole, and the sliding frame is provided with the spline shaft matched with the spline hole, so that the sliding frame can longitudinally slide, and meanwhile, the transverse power transmission can be ensured not to be interrupted.

8. The sliding frame can generate vertical pulse to the support plate only when the power connector of the driving device is connected with the second power input shaft and is pressed downwards vertically, and when the downward pressing force is released, the sliding frame is quickly reset under the action of the third spring, so that the vertical pulse is immediately eliminated, the pulse impact on the support plate is not required all the time, a large amount of polishing energy consumption can be saved, and the service life of a battery is prolonged.

Drawings

Fig. 1 is a structural view of the multipurpose sander of the present invention.

Fig. 2 is a partial cutaway view of the seat plate.

Fig. 3 is a structural view of a supporting plate assembly.

FIG. 4 is a partial cutaway view of the power box.

Fig. 5 is a structural view of the carriage.

Fig. 6 is a structural view of the driving device.

Description of the main reference numbers:

1-seat plate, 11-first side face, 111-first sliding groove, 112-sliding block, 113-first spring, 12-second side face, 13-driving roller, 14-driven roller, 141-elastic roller, 15-abrasive belt, 16-position-giving opening, 17-second sliding groove, 18-clamping block groove, 19-clamping block, 191-second clamping tooth, 192-handle and 110-second spring;

2-supporting plate component, 21-telescopic block, 211-first latch, and 22-supporting plate;

3-power box, 31-sliding cavity, 311-first cavity opening, 312-second cavity opening, 32-first power input shaft, 321-first fixing sleeve, 33-power output shaft, 34-first bevel gear, 35-second bevel gear, 36-third bevel gear, 37-first fixing seat, 38-second fixing seat and 39-spline hole;

4-sliding frame, 41-first end, 42-second end, 43-push rod, 431-inclined end surface, 44-second power input shaft, 441-second fixing sleeve, 45-spline shaft, 451-spline, 46-retainer ring, 47-third spring;

5-a driving device, 51-a driving motor, 52-a power connector, 521-a plug bush, 53-a handle and 54-a power switch;

6-push rod seat, 61-push rod groove, 62-inclined bottom surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. The terms "first", "second" and "third", if any, are used for descriptive purposes only and for distinguishing between technical features and are not to be construed as indicating or implying relative importance or implying a number of indicated technical features or a precedence of indicated technical features.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and may be, for example, 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. The following describes an embodiment of the present invention based on its overall structure.

As shown in fig. 1 to 6, the multipurpose sander in this embodiment includes: the seat plate 1, the first side surface 11, the first sliding groove 111, the sliding block 112, the first spring 113, the second side surface 12, the driving roller 13, the driven roller 14, the elastic roller 141, the sanding belt 15, the abdicating opening 16, the second sliding groove 17, the latch groove 18, the latch 19, the second latch 191, the handle 192, the second spring 110, the support plate assembly 2, the expansion block 21, the first latch 211, the support plate 22, the power box 3, the sliding cavity 31, the first cavity opening 311, the second cavity opening 312, the first power input shaft 32, the first fixing sleeve 321, the power output shaft 33, the first bevel gear 34, the second bevel gear 35, the third bevel gear 36, the first fixing seat 37, the second fixing seat 38, the spline hole 39, the sliding frame 4, the first end 41, the second end 42, the push rod 43, the inclined end surface 431, the second power input shaft 44, 441-the second fixing sleeve, the 45-spline shaft, 451-spline, 46-retainer ring, the third spring 47, the driving device 5, the driving motor 51, the power push rod 52, the insertion sleeve 53, the power switch 53, the handle holder 62, and the inclined groove 61.

The seat plate 1 is of a triangular structure, the seat plate 1 comprises a first side surface 11 and a second side surface 12 which are opposite to each other, a driving roller 13 and two driven rollers 14 are installed on the first side surface 11, the driving roller 13 is located right above the middle of the two driven rollers 14, abrasive belts 15 are installed on the driving roller 13 and the driven rollers 14, a yielding port 16 is formed in the bottom end of the seat plate 1 and located between the two driven rollers 14, one driven roller 14 is an elastic roller 141, a first sliding groove 111 in the horizontal direction is formed in the first side surface 11, a slidable sliding block 112 is installed in the first sliding groove 111, the driven rollers 14 are installed on the sliding block 112 in a rotatable mode, one end of the first sliding groove 111 is close to the yielding port 16, the other end of the first sliding groove 111 is far away from the yielding port 16, a first spring 113 is installed between one end of the first sliding groove 111 and the sliding block 112, when the elastic roller 141 is acted by an external force, the elastic roller 141 can be close to the other driven roller 14, the first spring 113 is compressed, and when the elastic roller 141 is in a free state, because of a restoring force of the first spring 113, the first driven roller 14 can be automatically far away from the other driven roller 14.

The support plate component 2 comprises a telescopic block 21, a second sliding groove 17 is formed in the bottom of the abdicating opening 16, one end of the telescopic block 21 is slidably mounted in the second sliding groove 17, the other end of the telescopic block 21 extends outwards from the abdicating opening 16, a support plate 22 is mounted at the other end of the telescopic block 21, the support plate 22 and the telescopic block 21 are perpendicular to each other, the middle of the support plate 22 is hinged to the other end of the telescopic block 21, a torsion spring is mounted at the hinged position and can enable the support plate 22 and the telescopic block 21 to be always kept in a perpendicular state, one end of the support plate 22 extends to the inner side of the abrasive belt 15 and is parallel to the abrasive belt 15, the other end of the support plate 22 extends outwards from the second side surface 12, a plurality of first clamping teeth 211 are arranged on one side, facing the first side surface 11, the plane parts of the first clamping teeth 211 face upwards, and the inclined edges face downwards; the first side 11 is provided with a clamping block groove 18, the clamping block groove 18 is communicated with the second sliding groove 17 and is perpendicular to the second sliding groove 17, a slidable clamping block 19 is arranged in the clamping block groove 18, a second spring 110 is arranged between the clamping block 19 and the seat plate 11, the second spring 110 can drive the clamping block 19 to be close to the telescopic block 21, a second clamping tooth 191 matched with the first clamping tooth 211 is arranged on the clamping block 19, a handle 192 is arranged on one side, far away from the second clamping tooth 191, of the clamping block 19, and when the second clamping tooth 191 and the first clamping tooth 211 are mutually engaged, the telescopic block 21 can be limited to slide in the second sliding groove 17.

The power box 3 is fixedly welded on the second side surface 12, a sliding cavity 31 is arranged inside the power box 3, two ends of the sliding cavity 31 respectively extend outwards from two ends of the sliding cavity 31 to form a first cavity opening 311 and a second cavity opening 312, the first cavity opening 311 is close to the support plate 22, two sides of the power box 3 are respectively provided with a first power input shaft 32 and a power output shaft 33, the power output shaft 33 is connected with the driving roller 13, when the first power input shaft 32 rotates, the power output shaft 33 can be driven to synchronously rotate, and a first bevel gear 34, a second bevel gear 35, a third bevel gear 36, a first fixing seat 37 and a second fixing seat 38 which can be matched with each other are arranged in the power box 3; the first bevel gear 34 is coaxially connected with the power output shaft 33, the second bevel gear 35 is coaxially connected with the first power input shaft 32, a certain distance is reserved between the first bevel gear 34 and the second bevel gear 35, the axes of the first bevel gear 34 and the second bevel gear 35 are overlapped, the third bevel gear 36 is rotatably mounted on the first fixed seat 37 and is positioned between the first bevel gear 34 and the second bevel gear 35, the axis of the third bevel gear 36 is perpendicular to the axes of the first bevel gear 34 and the second bevel gear 35, the third bevel gear 35 is simultaneously meshed with the first bevel gear 34 and the second bevel gear 35, and the center of the third bevel gear 36 is provided with a spline hole 39.

The sliding frame 4 is installed in the sliding cavity 31 and can slide along the sliding cavity, the sliding frame 4 comprises a first end 41 and a second end 42 which are opposite, the first end 41 can extend out from the first cavity opening 311, the second end 42 can extend out from the second cavity opening 312, a push rod 43 is arranged at the first end 41, the end part of the push rod 43 is perpendicular to the support plate 22 and is provided with an inclined end face 431, an included angle smaller than 90 degrees is formed between the inclined end face 431 and the axis of the push rod 43, the second end 42 is provided with a second power input shaft 44, when the second power input shaft 44 rotates, the power output shaft 33 and the push rod 43 can be driven to synchronously rotate at the same time, a rotatable spline shaft 45 is installed in the sliding frame 4, the spline shaft 45 can slidably pass through the spline hole 39, the outer side of the spline shaft 45 is matched with the spline hole 39 through a spline 451, one end of the spline shaft 45 is coaxially connected with the second power input shaft 44, the other end of the spline shaft 45 passes through the second spline shaft 38 to be coaxially connected with the push rod 43, a retainer ring 46 is fixedly arranged on the spline shaft 45, and a third spring 47 is arranged between the retainer ring 46 and the second retainer ring 38; the position of the supporting plate 22 close to the other end thereof is provided with a push rod seat 6 protruding outwards, the push rod seat 6 is provided with a push rod groove 61, the diameter of the push rod groove 61 is slightly larger than that of the end part of the push rod 43, the end part of the push rod 43 can be inserted into the push rod groove 61, the bottom of the push rod groove 61 is provided with an inclined bottom surface 62, and the inclination angle of the inclined bottom surface 62 is consistent with that of the inclined end surface 431.

The driving device 5 comprises a driving motor 51, the output end of the driving motor 51 is provided with a power connector 52, the power connector 52 can be detachably connected with the first power input shaft 32 and the second power input shaft 44 respectively, and can drive the first power input shaft 32 and the second power input shaft 44 to rotate respectively, the side part of the driving motor 51 is provided with a holding handle 53, a battery pack is installed in the handle 53, and the side part of the handle 53 is provided with a power switch 54; the periphery of the first power input shaft 32 is provided with a rectangular first fixing sleeve 321, the periphery of the second power input shaft 44 is provided with a rectangular second fixing sleeve 441, the periphery of the power connector 52 is provided with a rectangular inserting sleeve 521, and the inserting sleeve 521 can be inserted into the first fixing sleeve 321 and the second fixing sleeve 441 and is in quick fixed connection with the first fixing sleeve 321 and the second fixing sleeve 441 through spring pins.

The working principle of a multipurpose sander in this embodiment will be described in detail below to make the skilled person more aware of the invention:

in use, the sander can provide a plurality of sanding modes:

1. when a curved part needs to be polished, firstly, the power connector 52 is connected with the first power input shaft 32, then the pull handle 192 is pulled to pull the fixture block 19, the support plate 22 is retracted into the abdication port 16, the surface of a workpiece is polished through the polishing belt 15 between the two driven rollers 14, and the abdication port 16 can perform an abdication effect on the arc surface of a polished part;

2. when a plane part needs to be polished, the power connector 52 is connected with the first power input shaft 32, then the support plate 22 is pulled out directly, the surface of a workpiece is polished through the polishing belt 15 between the two driven rollers 14, and the support plate 22 can support the inner side of the polishing belt 15;

3. when the surface of a part needs to be polished strongly, the power connector 52 and the second power input shaft 44 are connected with each other to apply downward pressure, the surface of a workpiece is polished through the polishing belt 15 between the two driven rollers 14, when the handle 53 is pressed to the polishing position, the whole sliding frame 4 can move to the polishing area, so that the end part of the push rod 43 can be inserted into the push rod groove 61 of the push rod seat 6, the inclined bottom surface 62 and the inclined end surface 431 are alternately matched, a continuous pulse force in the vertical direction is applied to the support plate 22, a good polishing effect is achieved, and the polishing quality is improved.

In summary, the polishing machine is provided with the driving rollers which are arranged in a triangular shape and the driven rollers which roll to drive the polishing belt to polish, the working area of the polishing belt is provided with the relief opening, the polishing machine is not only suitable for polishing plane workpieces, but also suitable for polishing curved surface workpieces, the telescopic supporting plate component can support the polishing belt when the grinding machine polishes planes, so that the polishing effect is improved, two polishing modes of powerful polishing and common polishing are realized by changing the connecting position of the driving device, and the ejector rod can apply vertical pulse pressure to the supporting plate when the grinding machine polishes with powerful force, so that the polishing efficiency is improved, and the polishing quality is improved.

The foregoing description of the specific exemplary embodiments of the invention has been presented for the purposes of illustration and description and is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching, and although examples of the invention have been illustrated and described, the present examples are intended to be illustrative only and not limiting of the invention, the particular features, structures, materials or characteristics described may be suitably combined in any one or more examples or illustrations, which were chosen and described in order to explain certain principles of the invention and its practical application, to thereby enable others skilled in the art to make modifications, substitutions, variations and alternatives, as are suited to the particular use contemplated, without departing from the principles and spirit of the invention, and these are intended to be protected by the teachings of patent within the scope of the appended claims.

Claims (10)

1. A multipurpose sander, comprising:

the seat plate (1) comprises a first side surface (11) and a second side surface (12) which are opposite, a driving roller (13) and two driven rollers (14) are arranged on the first side surface (11), abrasive belts (15) are wound on the driving roller (13) and the driven rollers (14), one end of the seat plate (1) is provided with a position yielding opening (16), and the position yielding opening is positioned between the two driven rollers (14);

the supporting plate assembly (2) comprises a telescopic block (21), one end of the telescopic block (21) is slidably arranged in the seat plate (1), the other end of the telescopic block (21) extends outwards from the position giving opening (16), a supporting plate (22) is arranged at the other end of the telescopic block (21), one end of the supporting plate (22) extends to the inner side of the abrasive belt (15) and is parallel to the abrasive belt (15), and the other end of the supporting plate (22) extends outwards from the second side surface (12);

the power box (3) is fixedly arranged on the second side surface (12), a sliding cavity (31) is arranged inside the power box (3), two ends of the sliding cavity (31) respectively extend outwards from two ends of the sliding cavity (31) to form a first cavity opening (311) and a second cavity opening (312), the first cavity opening (311) is close to the support plate (22), a first power input shaft (32) and a power output shaft (33) are arranged on two sides of the power box (3), the power output shaft (33) is connected with the driving roller (13), and when the first power input shaft (32) rotates, the power output shaft (33) can be driven to synchronously rotate;

a sliding frame (4) slidably disposed in the sliding cavity (31), wherein the sliding frame (4) includes a first end (41) and a second end (42) which are opposite to each other, the first end (41) can extend out from the first cavity opening (311), the second end (42) can extend out from the second cavity opening (312), the first end (41) is provided with a push rod (43), the end of the push rod (43) is perpendicular to the support plate (22) and is provided with an inclined end surface (431), an included angle smaller than 90 degrees is formed between the inclined end surface (431) and the axis of the push rod (43), the second end (42) is provided with a second power input shaft (44), and when the second power input shaft (44) rotates, the power output shaft (33) and the push rod (43) can be simultaneously driven to synchronously rotate;

drive arrangement (5), it includes driving motor (51), the output of driving motor (51) is equipped with power connector (52), power connector (52) can respectively with first power input shaft (32) with second power input shaft (44) can be dismantled and connect, and can drive respectively first power input shaft (32) with second power input shaft (44) rotate, the lateral part of driving motor (51) is equipped with grips handle (53), be equipped with battery pack in handle (53), the lateral part of handle (53) is equipped with switch (54).

2. The multipurpose sander according to claim 1, wherein a first retainer sleeve (321) is provided on the outer periphery of the first power input shaft (32), a second retainer sleeve (441) is provided on the outer periphery of the second power input shaft (44), and a socket (521) is provided on the outer periphery of the power connector (52), wherein the socket (521) can be fixedly connected with the first retainer sleeve (321) and the second retainer sleeve (441).

3. A multipurpose sander according to claim 1, wherein one of said driven rollers (14) is a resilient roller (141), said resilient roller (141) being capable of moving closer to the other driven roller (14) when subjected to an external force, and said resilient roller (141) being capable of automatically moving away from the other driven roller (14) when in a free state.

4. The multipurpose sander according to claim 3, wherein the first side surface (11) is provided with a first sliding slot (111), a sliding block (112) is arranged in the first sliding slot (111), the driven roller (14) is rotatably arranged on the sliding block (112), one end of the first sliding slot (111) and the allowance opening (16) are close to each other, the other end of the first sliding slot (111) and the allowance opening (16) are far away from each other, and a first spring (113) is arranged between one end of the first sliding slot (111) and the sliding block (112).

5. A multipurpose sander according to claim 1, characterized in that said support plate (22) and said telescopic block (21) are perpendicular to each other, and the middle of said support plate (22) is hinged to the other end of said telescopic block (21), and a torsion spring is provided at the hinge to keep the support plate (22) and said telescopic block (21) in a perpendicular state all the time.

6. A multipurpose sanding machine according to claim 5, characterized in that the bottom of the relief opening (16) is provided with a second runner (17), in which second runner (17) the telescopic block (21) is slidably arranged, and in that on the side of the telescopic block (21) facing the first side surface (11) a number of first latches (211) are arranged.

7. The multipurpose sander according to claim 6, wherein a clamping block groove (18) is formed in the first side surface (11), the clamping block groove (18) and the second sliding groove (17) are mutually communicated and perpendicular, a slidable clamping block (19) is arranged in the clamping block groove (18), a second spring (110) is arranged between the clamping block (19) and the seat plate (1), the second spring (110) can drive the clamping block (19) and the telescopic block (21) to mutually approach, a second clamping tooth (191) matched with the first clamping tooth (211) is arranged on the clamping block (19), a handle (192) is arranged on one side, far away from the second clamping tooth (191), of the clamping block (19), and when the second clamping tooth (191) and the first clamping tooth (211) are mutually engaged, the telescopic block (21) can be limited from sliding inwards towards the second sliding groove (17).

8. The multipurpose sander according to claim 1, characterized in that a first bevel gear (34), a second bevel gear (35) and a third bevel gear (36) are arranged in the power box (3), wherein the first bevel gear (34) is coaxially connected with the power output shaft (33), the second bevel gear (35) is coaxially connected with the first power input shaft (32), and the first bevel gear (34) and the second bevel gear (35) have a certain distance and have the same axis; the power box (3) is further internally provided with a first fixed seat (37) and a second fixed seat (38), a third bevel gear (36) is rotatably arranged on the first fixed seat (37) and is positioned between the first bevel gear (34) and the second bevel gear (35), the axis of the third bevel gear (36) is perpendicular to the axes of the first bevel gear (34) and the second bevel gear (35), and the center of the third bevel gear (36) is provided with a spline hole (39).

9. A multipurpose sander as set forth in claim 8, wherein a rotatable spline shaft (45) is provided in said carriage (4), said spline shaft (45) slidably passes through said spline hole (39), a spline (451) matching with said spline hole (39) is provided on the outer side of said spline shaft (45), one end of said spline shaft (45) is coaxially connected with said second power input shaft (44), the other end of said spline shaft (45) passes through said second fixed seat (38) to be coaxially connected with said push rod (43), a retainer ring (46) is fixedly provided on said spline shaft (45), and a third spring (47) is provided between said retainer ring (46) and said second fixed seat (38).

10. The multipurpose sander according to claim 1, wherein the support plate (22) is provided with a push rod seat (6) protruding outwards, the push rod seat (6) is provided with a push rod groove (61), the end of the push rod (43) can be inserted into the push rod groove (61), the bottom of the push rod groove (61) is provided with an inclined bottom surface (62), and the inclination angle of the inclined bottom surface (62) is consistent with the inclination angle of the inclined end surface (431).

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