Multipurpose sanding machine

Abstract

The invention discloses a multipurpose sanding machine which comprises an assembly support and a base plate which are fixedly installed. The abrasive belt assembly, the compression roller assembly and the guide roller assembly specifically comprise a loop bar assembly and three different guide roller structures, one of the three guide roller structures can be selected to be installed on the base plate through the loop bar assembly, the three guide roller structures are used for enabling the abrasive belt assembly to be extruded and deformed, and the area, close to the guide roller assembly, of the abrasive belt assembly further forms an operation part. The other two guide roller mechanisms are installed on the assembly support through the loop bar assembly so as to meet various different sanding requirements. The replaceable guide roller assembly is adopted, different guide roller structures are applied according to different requirements, the guide roller structures do not generate unfavorable mutual interference during use, meanwhile, the characteristic that the abrasive belt assembly can freely change the form is utilized, and after the different guide roller structures are replaced, the abrasive belt assembly can be replaced, and the abrasive belt assembly can be replaced. The abrasive belt assembly can be adjusted through movement of the movable guide roller, and the effect that the abrasive belt is tightened for use is always kept.

Description

Technical Field

[0001] The invention belongs to the technical field of sanding machines, in particular to a multi-purpose sanding machine. Background Art

[0002] A sanding machine, also known as a belt sander, is a commonly used surface treatment equipment, mainly composed of a motor, a spindle, a belt, a sanding wheel and other components; the principle is that the motor drives the spindle to rotate, thereby driving the belt to circulate between the sanding wheel and the spindle; when the workpiece contacts the high-speed rotating belt, the abrasive on the belt will grind, deburr, and remove rust on the workpiece surface, making the workpiece surface smooth and flat.

[0003] In the prior art, a small burr sander with publication number CN216228617U records that a sanding belt assembly with a pressure roller and a correction member cooperates with a transmission assembly, which can adapt to workpieces of different thicknesses and ensure that the sanding belt assembly can perform efficient and stable sanding. At the same time, the side of the sanding belt assembly can perform additional workpiece sanding treatment; a multifunctional sanding machine with publication number CN211193347U records that during the sanding process of wood tools, a sanding belt tensioning mechanism arranged on the sanding mechanism can tighten the sanding belt to prevent the sanding belt from loosening and affecting the sanding effect. The sanding mechanism can replace other cylindrical sanding belts of different models at any time, thereby achieving the effect of sanding wood with different requirements.

[0004] However, the above prior art does not solve the problem of mutual interference between various sanding components when used. When multiple functional parts are used in combination, each sanding belt component needs to use the same working area, and the unused sanding belt components are still in the original position when used, which interferes with the sanding belt components in use and affects all functions of the sanding belt components in normal use. Moreover, when replacing the existing sanding belt components, it is not possible to change the shape of the sanding target, but only to achieve limited size replacement, that is, after the replacement, the original smaller sanding function can only be replaced by sanding the same larger object, and the sanding shape cannot be completely changed. For example, when sanding a wooden panel, it is necessary to have an arc sanding function that can sand the edges of the edges, a right-angle sanding function that can sand the edges of the vertical surfaces, and a flat sanding function for the main body of the panel. The existing multi-functional sanding belt machines are mainly aimed at sanding needs of different sizes, and are still aimed at different sizes for the same purpose, and do not produce new use effects, and are not suitable for the above functional requirements. Summary of the invention

[0005] The purpose of the present invention is to propose a multifunctional replaceable guide roller assembly for grinding flat surfaces, vertical surfaces and edges and corners on the same panel when the existing belt sander is used. The guide roller assemblies can be replaced without any adverse mutual interference, thereby providing a multi-purpose sanding machine.

[0006] The technical solution adopted by the present invention is as follows: A multi-purpose sanding machine, comprising: Fixed mounting component brackets and baseplates; A sanding belt assembly, mounted inside the base plate, for sanding the workpiece; A pressure roller assembly is installed on the base plate and is used to press and drive the abrasive belt assembly; The guide roller assembly specifically includes a sleeve rod assembly and three different guide roller structures. The three guide roller mechanisms can be selectively installed on the base plate through the sleeve rod assembly to squeeze and deform the sanding belt assembly, and further form a working part in the area of ​​the sanding belt assembly close to the guide roller assembly. The other two guide roller mechanisms are installed on the assembly bracket through the sleeve rod assembly to meet a variety of different sanding requirements.

[0007] Among them, the guide roller assembly includes a conical guide roller, a roller guide roller and a flat guide roller, the sanding belt assembly includes a conical sanding belt, a roller sanding belt and a flat sanding belt which respectively cooperate with the conical guide roller, the roller guide roller and the flat guide roller to form a sanding belt grinding structure, and the sleeve rod assembly includes a first set of rods, a second set of rods and a third set of rods which are respectively fixed to the conical guide roller, the roller guide roller and the flat guide roller for standardized installation.

[0008] Wherein, the tapered guide roller comprises two frame assemblies arranged parallel to each other and a first guide roller arranged in the gap between the two frame assemblies; Support bolts are fixedly installed between the two frame assemblies, at least one of the two frame assemblies is fixedly installed on the end of the first set of rods, and the same end of the two frame assemblies away from the first set of rods is provided with an open groove, and bearings are fixedly installed on both ends of the first guide roller, and the two bearings are respectively plugged into the two open grooves.

[0009] Wherein, the roller guide roller comprises a second guide roller rotatably connected to the end of the second set of rods through a rotating shaft and a first support plate vertically arranged to the arc surface; An extension rod is fixedly connected between the second set of rods and the first supporting plate, and a concave area matching the concave of the second guide roller is provided on the first supporting plate.

[0010] Wherein, the flat plate guide roller comprises a vertical plate rotatably mounted at the end of the third set of rods through a rotating shaft and two third guide rollers rotatably connected at the upper and lower ends of the vertical plate; An adjustment disc is fixedly installed on the side of the vertical plate, and an adjustment groove with a rotation axis as the center of the arc is opened on the adjustment disc. A second knob is threadedly installed on the third set of rods, and the second knob passes through the adjustment groove. A guide roller baffle is installed on the third guide roller above the two third guide rollers, and the guide roller baffle is fixedly installed on the vertical plate. A second support plate is fixed on the outer side of the third set of rods, and a recessed portion for cooperating with the flat sanding belt transmission is opened on the second support plate. A pad is fixed on the side of the vertical plate.

[0011] Wherein, the component bracket includes: a bottom plate; The column and the motor are fixedly installed above the base plate; At least two installation sleeves are fixed on the column at an angle to cooperate with the insertion of the sleeve rod assembly.

[0012] Wherein, the base plate includes: a side plate fixedly mounted on the bottom plate; The plug-in slots provided on the side panels are adapted for plugging in the sleeve rod assembly; The upper baffle shell is fixedly installed with the side plate; The locking handle is screwed and installed on the side plate near the plug-in slot, and the extended end of the locking handle that passes through the side wall of the plug-in slot is abutted against the matching sleeve rod assembly.

[0013] Wherein, the pressure roller assembly includes: a driving guide wheel, fixedly installed with the output end of the motor; A rotating push rod is installed in the middle section with a flip shaft connected to the side plate for rotation, a threaded rod is inserted and slidably connected at one end, and a slot is opened at the other end. The threaded rod passes through the extended end of the rotating push rod and is screwed and connected with a threaded screw cap, and the threaded screw cap abuts against the side wall of the rotating push rod. A pressure roller spring is fixed at one end of the threaded rod away from the threaded screw cap, and the free end of the pressure roller spring is fixed with the side plate by clamping, and an insertion rod is inserted in the slot, and a pin that passes through the insertion rod is inserted into the side wall of the slot; The movable guide wheel is rotatably connected with the insertion rod.

[0014] Among them, a through shaft is rotatably connected between the rotating push rod and the movable guide wheel, a pressure roller slide groove cooperating with the sliding of the through shaft is opened on the side plate, an operating handle is fixedly installed on the rotating push rod, and a locking knob is screwed and connected to the outer side of the rotating push rod, and the extending end of the locking knob abuts against the side wall of the side plate.

[0015] Wherein, the conical abrasive belt, the roller abrasive belt and the flat abrasive belt can be connected to the driving guide wheel and the movable guide wheel in a transmission manner.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, a replaceable guide roller assembly is adopted. In order to meet the needs of various purposes, the working area mainly used for grinding is set to three different guide roller structures, and different guide roller structures are applied to different needs; and each guide roller structure does not produce adverse mutual interference when in use, which is more convenient for daily use, and realizes the purpose of integrating different types of grinding functions into the same sanding machine.

[0017] 2. In the present invention, a structure for spreading the double rollers of the abrasive belt assembly is adopted, and a fixed driving guide roller and a movable active guide roller are adopted. At the same time, the characteristic that the abrasive belt assembly can freely change its shape is utilized, so that after the three different guide roller structures are replaced, the abrasive belt assembly can be adjusted by moving the movable guide roller, and finally the abrasive belt assembly can follow the replacement of the guide roller assembly and always keep it in a taut state for use.

[0018] 3. In the present invention, an elastic movable guide roller limiting structure is adopted. The rotation of the rotating push rod is driven by the pressure roller spring, so that the movable guide roller can generate a certain pressure on the sand belt assembly. Therefore, when the sand belt assembly produces a slight expansion and contraction during the working process, the movable guide roller can be pushed by the pressure roller spring to automatically adjust the position, thereby ultimately improving the stability of the sand belt assembly during the working process and reducing the possibility of the sand belt assembly being too loose or too tight during the working process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of the present invention; Figure 2 It is a schematic diagram of the front side of the overall mechanism of the second embodiment of the present invention; Figure 3 This is a partial structural exploded view of the second embodiment of the present invention; Figure 4 It is a cross-sectional view of the abrasive belt assembly in the second embodiment of the present invention; Figure 5 is a cross-sectional view of the plug-in slot in the second embodiment of the present invention; Figure 6 It is a schematic diagram of the rear side of the overall mechanism in the second embodiment of the present invention; Figure 7 It is a schematic diagram of the front side of the overall mechanism of the third embodiment of the present invention; Figure 8 This is a partial structural exploded view of the third embodiment of the present invention; Fig. 9 It is a cross-sectional view of the abrasive belt assembly in the third embodiment of the present invention; Fig.10 is a cross-sectional view of the plug-in slot in the third embodiment of the present invention; Fig.11 It is a schematic diagram of the rear side of the overall mechanism in the third embodiment of the present invention; Fig.12 It is a schematic diagram of the front side of the overall mechanism of the fourth embodiment of the present invention; Fig.13 This is a partial structural exploded view of the fourth embodiment of the present invention; Fig.14 It is a cross-sectional view of the abrasive belt assembly in the fourth embodiment of the present invention; Fig.15 is a cross-sectional view of the plug-in slot in the fourth embodiment of the present invention; Fig.16 It is a schematic diagram of the rear side of the overall mechanism in the fourth embodiment of the present invention; Fig.17 Schematic diagram of the embodiment 1 of the present invention where the guide roller assembly is not installed Figure 1 ; Fig.18 Schematic diagram of the embodiment 1 of the present invention where the guide roller assembly is not installed Figure 2 ; Fig.19 Schematic diagram of the embodiment 1 of the present invention where the guide roller assembly is not installed Figure 3 ; Fig. 20 Schematic diagram of the embodiment 1 of the present invention where the guide roller assembly is not installed Figure 4 ; Fig.21 Schematic diagram of the embodiment 1 of the present invention where the guide roller assembly is not installed Figure 5 ; Fig. 22 Schematic diagram of the embodiment 1 of the present invention where the guide roller assembly is not installed Figure 6 .

[0020] Markings in the figure: 1. Base plate; 11. Side plate; 12. Plug slot; 13. Upper stop shell; 14. Locking handle; 2. Component bracket; 21. Base plate; 22. Column; 23. Mounting sleeve; 24. Motor; 3. Press roller assembly; 31. Drive guide wheel; 32. Movable guide wheel; 33. Rotating push rod; 331. Turning shaft; 332. Slot; 333. Latch; 334. Insert rod; 335. Locking knob; 336. Operating handle; 337. Press roller slide; 34. Press roller spring; 35. Threaded rod; 36. Threaded screw cap; 4. Abrasive belt assembly; 4a. Conical abrasive belt; 4b. Roller abrasive belt; 4c. Flat abrasive belt; 5. Guide roller assembly; 5a, tapered guide roller; 51a, first set of rods; 52a, frame assembly; 53a, supporting bolts; 54a, open groove; 55a, first guide roller; 56a, bearing; 5b, roller guide roller; 51b, second set of rods; 52b, extension rod; 53b, first support plate; 54b, second guide roller; 5c, flat guide roller; 51c, third set of rods; 52c, adjustment disc; 53c, vertical plate; 54c, third guide roller; 55c, pad; 56c, second knob; 57c, guide roller baffle; 58c, second support plate; 59c, adjustment slot. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] Embodiment 1, refer to Figure 1-22 , a multi-purpose sanding machine, comprising: A fixedly mounted component bracket 2 and a base plate 1; A sanding belt assembly 4, installed inside the base plate 1, for sanding the workpiece; The pressure roller assembly 3 is installed on the base plate 1 and is used to press and drive the abrasive belt assembly 4; The guide roller assembly 5 specifically includes a sleeve rod assembly and three different guide roller structures. The three guide roller mechanisms can be selectively installed on the base plate 1 through the sleeve rod assembly, so as to cause the sanding belt assembly 4 to be squeezed and deformed, and further form a working portion in the area of ​​the sanding belt assembly 4 close to the guide roller assembly 5. The other two guide roller mechanisms are installed on the assembly bracket 2 through the sleeve rod assembly to meet various different sanding requirements; When in use, the sanding machine can replace different guide roller mechanisms according to different grinding requirements, and then adjust the sanding belt assembly 4 through the pressure roller assembly 3 according to the different guide roller structures, so that the sanding belt assembly 4 is tightened between the pressure roller assembly 3 and the guide roller assembly 5, and the sanding belt assembly 4 forms a specific working shape in the working area of ​​the guide roller assembly 5, so as to be used for grinding with different requirements; Specifically, the guide roller assembly 5 is provided with a sleeve rod assembly for fixing and three different forms of guide roller structures for grinding. When one of the guide roller structures is used, the guide roller structure can be installed in the working area of ​​the substrate 1 through the sleeve rod assembly, and the other two unused guide roller structures can also be installed in the accommodating area of ​​the assembly bracket 2 through the sleeve rod assembly, and the positions of the three guide roller structures can be replaced with each other at any time to meet different grinding requirements.

[0023] The guide roller assembly 5 includes a conical guide roller 5a, a roller guide roller 5b and a flat guide roller 5c, the sand belt assembly 4 includes a conical sand belt 4a, a roller sand belt 4b and a flat sand belt 4c which respectively cooperate with the conical guide roller 5a, the roller guide roller 5b and the flat guide roller 5c to form a sand belt grinding structure, and the sleeve rod assembly includes a first sleeve rod 51a, a second sleeve rod 51b and a third sleeve rod 51c which are respectively fixed to the conical guide roller 5a, the roller guide roller 5b and the flat guide roller 5c for standardized installation; the conical sand belt 4a, the roller sand belt 4b and the flat sand belt 4c can be connected to the driving guide wheel 31 and the movable guide wheel 32 in transmission connection; The tapered guide roller 5a includes two frame assemblies 52a arranged parallel to each other and a first guide roller 55a arranged in the gap between the two frame assemblies 52a; A supporting bolt 53a is fixedly installed between the two frame assemblies 52a, at least one of the two frame assemblies 52a is fixedly installed with the end of the first set of rods 51a, and the same end of the two frame assemblies 52a away from the first set of rods 51a is provided with an open groove 54a, and bearings 56a are fixedly installed at both ends of the first guide roller 55a, and the two bearings 56a are respectively plugged into the two open grooves 54a; Specifically, the two frame assemblies 52a form a limit for the sanding belt assembly 4, and then the support bolts 53a are used to support the distance between the two frame assemblies 52a, and finally the sanding belt assembly 4 is squeezed by the first guide roller 55a, and the two bearings 56a are used to facilitate the rotation of the first guide roller 55a, and the setting of the open groove 54a facilitates the installation and limitation of the two bearings 56a on both sides of the first guide roller 55a; when in use, the sanding belt assembly 4 forms a working part for grinding near the top of the first guide roller 55a, and the first support plate 53b of the roller guide roller 5b installed on the assembly bracket 2 and the second support plate 58c in the flat guide roller 5c can be used to auxiliary support the workpiece to be processed, thereby facilitating the grinding operation.

[0024] The roller guide roller 5b includes a second guide roller 54b rotatably connected to the end of the second rod 51b through a rotating shaft and a first support plate 53b vertically arranged to the arc surface; an extension rod 52b is fixedly connected between the second rod 51b and the first support plate 53b, and a concave area matching the concave of the second guide roller 54b is provided on the first support plate 53b; Specifically, the second guide roller 54b is configured as a roller-shaped structure, so that the grinding working part of the roller abrasive belt 4b close to the first support plate 53b forms a wheel-shaped surface; when in use, the workpiece to be processed can be attached to the top of the first support plate 53b, and through the recessed area set on the first support plate 53b, the workpiece to be processed can be completely attached to the outer wall of the roller abrasive belt 4b, thereby facilitating the grinding operation.

[0025] The flat plate guide roller 5c includes a vertical plate 53c rotatably mounted at the end of a third rod 51c through a rotating shaft, and two third guide rollers 54c rotatably connected at the upper and lower ends of the vertical plate 53c; an adjusting disc 52c is fixedly mounted on the side of the vertical plate 53c, and an adjusting groove 59c with an arc center around the rotating shaft is provided on the adjusting disc 52c; a second knob 56c is threadedly mounted on the third rod 51c, and the second knob 56c passes through the adjusting groove 59c; a guide roller baffle 57c is installed at the third guide roller 54c above the two third guide rollers 54c, and the guide roller baffle 57c is fixedly mounted on the vertical plate 53c; a second support plate 58c is fixed on the outer side of the third rod 51c, and a recessed portion is provided on the second support plate 58c for cooperating with the transmission of the flat plate sanding belt 4c; a pad 55c is fixed on the side of the vertical plate 53c; Specifically, the setting of the two third guide rollers 54c allows the grinding working part of the flat sanding belt 4c near the second support plate 58c to form a strip-shaped plane, and the angle between the upper plane of the second support plate 58c and the strip-shaped plane is adjustable, thereby facilitating the needs of plane grinding at various angles; when in use, the adjustment groove 59c can be set to allow the adjustment disc 52c, the vertical plate 53c and the two third guide rollers 54c to rotate around the rotation axis, and then the second knob 56c is set to allow the rotated adjustment disc 52c to be fixed to the third sleeve rod 51c by the second knob 56c, thereby realizing the angle adjustment between the upper plane of the second support plate 58c and the strip-shaped plane, further realizing grinding at various angles and facilitating grinding operations.

[0026] The component bracket 2 includes: a bottom plate 21; a column 22 and a motor 24, both of which are fixedly installed on the top of the bottom plate 21; at least two mounting sleeves 23, which are fixedly fixed on the column 22 in an inclined manner, and are used to cooperate with the plugging of the sleeve rod assembly; the base plate 1 includes: a side plate 11, which is fixedly installed with the bottom plate 21; a plug-in slot 12 provided on the side plate 11, which cooperates with the plug-in of the sleeve rod assembly; an upper stopper shell 13, which is fixedly installed with the side plate 11; a locking handle 14, which is screwed and installed on the side plate 11 near the plug-in slot 12, and the extended end of the locking handle 14 that passes through the side wall of the plug-in slot 12 cooperates with the sleeve rod assembly to abut; Specifically, the bottom plate 21 is provided to fix and support various components in the overall sanding machine; The column 22 is provided for the installation of at least two installation sleeves 23; The motor 24 is provided to drive the transmission of the abrasive belt assembly 4, further realizing the function of the abrasive belt machine grinding; At least two installation sleeves 23 are provided to cooperate with the insertion of the remaining two unused sleeve rod assemblies in the guide roller assembly 5, so that the three sleeve rod assemblies in the guide roller assembly 5 can be installed in the belt sander equipment at the same time, which can effectively prevent the defect of component loss and facilitate quick replacement during use; The side plate 11 is provided to support the installation of the working sleeve rod assembly and the installation of the pressure roller assembly 3; The plug-in slot 12 is provided to cooperate with the plug-in and replacement of any one of the three sleeve rod assemblies in the guide roller assembly 5; and the sleeve rod assembly can be locked and released by the locking handle 14; The upper baffle shell 13 is provided to shield a portion of the area where the sanding belt assembly 4 does not need to work, so as to prevent the operator from accidentally touching it.

[0027] The pressure roller assembly 3 includes: a driving guide wheel 31, which is fixedly installed with the output end of the motor 24; a rotating push rod 33, a middle section of which is installed with a flip shaft 331 rotatably connected to the side plate 11, a threaded rod 35 is inserted and slidably inserted at one end, and a slot 332 is opened at the other end. The threaded rod 35 passes through the extended end of the rotating push rod 33 and is screwed and connected with a threaded screw cap 36. The threaded screw cap 36 abuts against the side wall of the rotating push rod 33, and a pressure roller spring 34 is fixed at one end of the threaded rod 35 away from the threaded screw cap 36. The free end of the pressure roller spring 34 is connected to the side plate 11 The slot 332 is fixed with a plug rod 334, and the side wall of the slot 332 is plugged with a pin 333 that penetrates the plug rod 334; the movable guide wheel 32 is rotatably connected to the plug rod 334; a through shaft is rotatably connected between the rotating push rod 33 and the movable guide wheel 32, and a roller slide groove 337 that cooperates with the sliding of the through shaft is provided on the side plate 11, and an operating handle 336 is fixedly installed on the rotating push rod 33, and a locking knob 335 is screwed and connected to the outer side of the rotating push rod 33, and the extended end of the locking knob 335 abuts against the side wall of the side plate 11; Specifically, the output end of the motor 24 drives the driving guide wheel 31 to rotate, and further drives the sanding belt assembly 4 that forms a transmission relationship with the driving guide wheel 31 to form a transmission effect. The threaded screw cap 36 is arranged to abut against the rotating push rod 33, and the position of the movable guide wheel 32 at the other end of the rotating push rod 33 can be fine-tuned by the screw of the threaded screw cap 36 on the threaded rod 35, wherein the movable guide wheel 32 also makes the sanding belt assembly 4 stretched and tightened; when in use, when the pressure roller spring 34 contracts, it can drive the rotating push rod 33 to rotate around the flip axis 331, and further drive the insertion rod 334 and the movable guide wheel 32 to slide in the pressure roller slide groove 337, so that the movable guide wheel 32 can be replaced according to the guide roller assembly 5, and the tightening effect of the sanding belt assembly 4 can be adjusted at the same time; Specifically, the latch 333 is used to fix the insertion rod 334 in the slot 332, the operating handle 336 is used to manually adjust the rotation angle of the rotating push rod 33, and the locking knob 335 is used to limit the rotating push rod 33 on the side plate 11 through the locking knob 335 after the operating handle 336 adjusts the angle of the rotating push rod 33, and at this time, it is no longer adjusted through the pressure roller spring 34.

[0028] Example 2, refer to Figure 2-6 When the tapered guide roller 5a in the guide roller assembly 5 is installed in the working area of ​​the base plate 1 through the first set of rods 51a, the abrasive belt assembly 4 will be squeezed to form a tapered abrasive belt 4a structure, and the roller guide roller 5b and the flat guide roller 5c are installed in the accommodating area of ​​the assembly bracket 2 through the second set of rods 51b and the third set of rods 51c respectively; Example 3, refer to Figure 7-11 When the roller guide roller 5b in the guide roller assembly 5 is installed in the working area of ​​the base plate 1 through the second set of rods 51b, the abrasive belt assembly 4 will be squeezed to form a roller abrasive belt 4b structure, and the conical guide roller 5a and the flat guide roller 5c are installed in the accommodating area of ​​the assembly bracket 2 through the first set of rods 51a and the third set of rods 51c respectively; Embodiment 4, referring to Figure 12-16 When the flat guide roller 5c in the guide roller assembly 5 is installed in the working area of ​​the substrate 1 through the third set of rods 51c, the abrasive belt assembly 4 will be squeezed to form a flat abrasive belt 4c structure, and the conical guide roller 5a and the roller guide roller 5b will be installed in the accommodating area of ​​the assembly bracket 2 through the first set of rods 51a and the second set of rods 51b respectively.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-purpose sanding machine, characterized in that: include: A fixedly mounted component bracket (2) and a base plate (1); A sanding belt assembly (4) installed inside the base plate (1) and used for sanding a workpiece; A pressure roller assembly (3) is mounted on the base plate (1) and is used to press and drive the abrasive belt assembly (4); The guide roller assembly (5) specifically comprises a sleeve rod assembly and three different guide roller structures. The three guide roller mechanisms can be selectively installed on a base plate (1) through the sleeve rod assembly, and are used to cause the sanding belt assembly (4) to be squeezed and deformed, so that the area of ​​the sanding belt assembly (4) close to the guide roller assembly (5) forms a working portion. The other two guide roller mechanisms are installed on an assembly bracket (2) through the sleeve rod assembly, so as to be suitable for a variety of different sanding requirements.

2. A multi-purpose sanding machine as claimed in claim 1, characterized in that: The guide roller assembly (5) comprises a conical guide roller (5a), a roller guide roller (5b) and a flat guide roller (5c); the sanding belt assembly (4) comprises a conical sanding belt (4a), a roller sanding belt (4b) and a flat sanding belt (4c) which respectively cooperate with the conical guide roller (5a), the roller guide roller (5b) and the flat guide roller (5c) to form a sanding belt grinding structure; the sleeve rod assembly comprises a first sleeve rod (51a), a second sleeve rod (51b) and a third sleeve rod (51c) which are respectively fixed to the conical guide roller (5a), the roller guide roller (5b) and the flat guide roller (5c) for standardized installation.

3. A multi-purpose sanding machine as claimed in claim 2, characterized in that: The tapered guide roller (5a) comprises two frame assemblies (52a) arranged in parallel with each other and a first guide roller (55a) arranged in the gap between the two frame assemblies (52a); A supporting bolt (53a) is fixedly installed between the two frame assemblies (52a), at least one of the two frame assemblies (52a) is fixedly installed to the end of the first set of rods (51a), an open groove (54a) is provided at the same end of the two frame assemblies (52a) away from the first set of rods (51a), bearings (56a) are fixedly installed at both ends of the first guide roller (55a), and the two bearings (56a) are respectively plugged into the two open grooves (54a).

4. A multi-purpose sanding machine as claimed in claim 2, characterized in that: The roller guide roller (5b) comprises a second guide roller (54b) rotatably connected to the end of the second sleeve rod (51b) via a rotating shaft, and a first support plate (53b) arranged perpendicular to the arc surface; An extension rod (52b) is fixedly connected between the second sleeve rod (51b) and the first support plate (53b), and the first support plate (53b) is provided with a recessed area that matches the inner concave area of ​​the second guide roller (54b).

5. A multi-purpose sanding machine as claimed in claim 2, characterized in that: The flat plate guide roller (5c) comprises a vertical plate (53c) rotatably mounted at the end of a third sleeve rod (51c) via a rotating shaft, and two third guide rollers (54c) rotatably connected at the upper and lower ends of the vertical plate (53c); An adjustment disc (52c) is fixedly mounted on the side of the vertical plate (53c), and an adjustment groove (59c) with an arc center around the rotation axis is formed on the adjustment disc (52c). A second knob (56c) is threadedly mounted on the third sleeve rod (51c), and the second knob (56c) passes through the adjustment groove (59c). A guide roller baffle (57c) is mounted on the third guide roller (54c) above the two third guide rollers (54c), and the guide roller baffle (57c) is fixedly mounted on the vertical plate (53c). A second support plate (58c) is fixed on the outer side of the third sleeve rod (51c), and a recessed portion for cooperating with the flat sanding belt (4c) for transmission is formed on the second support plate (58c). A pad (55c) is fixed on the side of the vertical plate (53c).

6. A multi-purpose sanding machine as claimed in claim 2, characterized in that: The component bracket (2) comprises: a bottom plate (21); The column (22) and the motor (24) are both fixedly mounted above the bottom plate (21); At least two mounting sleeves (23) are fixed obliquely on the upright column (22) and are used for cooperating with the insertion of the sleeve rod assembly.

7. A multi-purpose sanding machine as claimed in claim 6, characterized in that: The base plate (1) comprises: a side plate (11) fixedly mounted on a bottom plate (21); A plug-in slot (12) is provided on the side plate (11) to cooperate with the plug-in of the sleeve rod assembly; An upper retaining shell (13) is fixedly mounted on the side plate (11); The locking handle (14) is screwed and mounted on the side plate (11) near the plug slot (12), and the extended end of the locking handle (14) that passes through the side wall of the plug slot (12) abuts against the matching sleeve rod assembly.

8. A multi-purpose sanding machine as claimed in claim 7, characterized in that: The pressure roller assembly (3) comprises: a driving guide wheel (31) fixedly mounted on the output end of the motor (24); A rotating push rod (33) is installed in the middle section with a flip shaft (331) rotatably connected to the side plate (11), a threaded rod (35) is inserted and slidably connected at one end, and a slot (332) is opened at the other end, the threaded rod (35) passes through the extending end of the rotating push rod (33) and is screwed and connected with a threaded screw cap (36), the threaded screw cap (36) abuts against the side wall of the rotating push rod (33), a pressure roller spring (34) is fixed to the end of the threaded rod (35) away from the threaded screw cap (36), the free end of the pressure roller spring (34) is clamped and fixed to the side plate (11), an insertion rod (334) is inserted in the slot (332), and a latch (333) that passes through the insertion rod (334) is inserted into the side wall of the slot (332); The movable guide wheel (32) is rotatably connected to the insertion rod (334).

9. A multi-purpose sanding machine as claimed in claim 8, characterized in that: A through shaft is rotatably connected between the rotating push rod (33) and the movable guide wheel (32); a pressure roller slide groove (337) cooperating with the sliding of the through shaft is provided on the side plate (11); an operating handle (336) is fixedly mounted on the rotating push rod (33); a locking knob (335) is screwed on the outer side of the rotating push rod (33); an extended end of the locking knob (335) abuts against the side wall of the side plate (11).

10. A multi-purpose sanding machine as claimed in claim 9, characterized in that: The conical sanding belt (4a), the roller sanding belt (4b) and the flat sanding belt (4c) can be connected to the driving guide wheel (31) and the movable guide wheel (32) in a transmission manner.

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