A multi-purpose sander

Abstract

The present invention discloses a multi-purpose sander, comprising: a fixedly installed component bracket and a substrate; a sand belt assembly, a pressure roller assembly, and a guide roller assembly, specifically including a sleeve rod assembly and three different guide roller structures. The three guide roller mechanisms can be selectively installed on the substrate through the sleeve rod assembly to cause the sand belt assembly to be extruded and deformed, further forming an operating part in the area where the sand belt assembly is close to the guide roller assembly. The other two guide roller mechanisms are installed on the component bracket through the sleeve rod assembly to be applicable to a variety of different sanding requirements. In the present invention, a replaceable guide roller assembly is adopted, different guide roller structures are applied in different requirements, and no adverse mutual interference occurs when each guide roller structure is in use. At the same time, by utilizing the characteristic that the sand belt assembly can freely change its shape, after different guide roller structures are replaced, the sand belt assembly can be adjusted by the movement of the movable guide roller, and the effect of keeping the sand belt taut during use is always maintained.

Description

Technical Field

[0001] The present invention belongs to the technical field of sanding machines, and specifically relates to a multi-purpose sanding machine. Background Art

[0002] A sanding machine, also known as a belt sander, is a commonly used surface treatment device, mainly composed of components such as a motor, a main shaft, a belt, and a sanding wheel; its principle is that the motor drives the main shaft to rotate, and then drives the belt to circulate between the sanding wheel and the main shaft; when the workpiece contacts the high-speed rotating belt, the abrasive on the belt will polish, deburr, rust-remove, etc. the surface of the workpiece, making the surface of the workpiece smooth and flat.

[0003] In the prior art, a small burr sanding machine with the publication number CN216228617U records that a sanding belt assembly with a pressure roller and a deviation correction component cooperates with a conveying component, which can adapt to workpieces of different thicknesses, and ensures that the sanding belt assembly performs sanding efficiently and stably. At the same time, the side of the sanding belt assembly can perform additional sanding treatment on the workpiece; a multi-functional sanding machine with the publication number CN211193347U records that during the woodworking process, a sanding belt tensioning mechanism provided 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 be replaced with other cylindrical sanding belts of different models at any time, achieving the effect of sanding wood with different requirements.

[0004] However, in the above prior art, the problem of interference between multiple different sanding components is not solved during use. When multiple functional components are combined and used, each sanding belt assembly needs to use the same working area, and the unused sanding belt assembly is still in its original position during use, causing interference to the sanding belt assembly in use and affecting all functions of the sanding belt assembly in normal use;

[0005] Moreover, when the existing sanding belt assembly is replaced, it cannot change the shape of the grinding target, and can only achieve limited size replacement, that is, after replacement, the original function of grinding a smaller object can only be replaced with the function of grinding a larger object of the same kind, and cannot completely change the grinding shape. For example, when specifically sanding a wooden panel, it is necessary to have a circular arc grinding function that can grind the edges and corners, a right angle grinding function that can grind the edges of the vertical surface, and a flat surface grinding function for the main body of the panel. However, the existing multi-functional sanding machines mainly target different size grinding requirements, still for different sizes of the same use, and do not produce new use effects, and are not suitable for the above functional requirements. Summary of the Invention

[0006] The object of the present invention is to propose a multi-functional replaceable guide roller assembly for a multi-purpose sander, which can be used for different sanding positions and there is no adverse mutual interference between the replaced guide roller assemblies, in order to meet the need of simultaneously sanding a flat surface, a vertical surface and an edge on the same panel when the existing belt sander is in specific use.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A multi-purpose sander, comprising:

[0009] A fixedly installed component bracket and a substrate;

[0010] A belt assembly, installed inside the substrate, for sanding workpieces;

[0011] A pressure roller assembly, installed on the substrate, for pressing and driving the belt assembly;

[0012] A guide roller assembly, specifically including a sleeve rod assembly and three different guide roller structures. The three guide roller mechanisms can be selectively installed on the substrate through the sleeve rod assembly to deform the belt assembly by extrusion, so that the area of the belt assembly close to the guide roller assembly forms a working part. The other two guide roller mechanisms are installed on the component bracket through the sleeve rod assembly to meet a variety of different sanding requirements.

[0013] Among them, the guide roller assembly includes a conical guide roller, a roller guide roller and a flat guide roller. The belt assembly includes a conical belt, a roller belt and a flat belt that respectively cooperate with the conical guide roller, the roller guide roller and the flat guide roller to form a belt sanding structure. The sleeve rod assembly includes a first sleeve rod, a second sleeve rod and a third sleeve rod that are respectively fixed to the conical guide roller, the roller guide roller and the flat guide roller for standardized installation.

[0014] Among them, the conical guide roller includes two frame components arranged in parallel with each other and a first guide roller arranged at the gap between the two frame components;

[0015] A support bolt is fixedly installed between the two frame components. At least one of the two frame components is fixedly installed at the end of the first sleeve rod. Open slots are provided at the same end of the two frame components away from the first sleeve rod. Bearings are fixedly installed at both ends of the first guide roller, and the two bearings are respectively inserted into the two open slots.

[0016] Among them, the roller guide roller includes a second guide roller rotatably connected to the end of the second sleeve rod through a rotating shaft and a first support plate perpendicular to the arc surface;

[0017] An extension rod is fixedly connected between the second sleeve rod and the first support plate. A concave area is provided on the first support plate to cooperate with the second guide roller.

[0018] Among them, the flat guide roller includes a vertical plate rotatably installed at the end of the third sleeve rod through a rotating shaft, and two third guide rollers rotatably connected to the upper and lower ends of the vertical plate respectively;

[0019] An adjustment disc is fixedly installed on the side of the vertical plate. An adjustment groove with the rotating shaft as the arc center is provided on the adjustment disc. A second knob is screwed onto the third sleeve rod and passes through the adjustment groove. A guide roller baffle is installed at the upper third guide roller of the two third guide rollers. The guide roller baffle is fixedly installed with the vertical plate. A second support plate is fixed on the outside of the third sleeve rod. A recess for cooperating with the flat abrasive belt transmission is provided on the second support plate. A backing plate is fixed on the side of the vertical plate.

[0020] Among them, the component support includes: a bottom plate;

[0021] A column and a motor, both fixedly installed above the bottom plate;

[0022] At least two installation sleeves are obliquely fixed on the column for cooperating with the insertion of the sleeve rod assembly.

[0023] Among them, the substrate includes: a side plate fixedly installed with the bottom plate;

[0024] An insertion slot opened on the side plate for cooperating with the insertion of the sleeve rod assembly;

[0025] An upper retaining shell fixedly installed with the side plate;

[0026] A locking handle is screwed onto the side plate near the insertion slot, and the extended end of the locking handle passing through the side wall of the insertion slot cooperates with the sleeve rod assembly to abut.

[0027] Among them, the pressure roller assembly includes: a driving guide wheel fixedly installed at the output end of the motor;

[0028] A rotating push rod, with a turning shaft rotatably connected to the side plate in the middle section, a threaded rod inserted and slid on one end, and a slot opened on the other end. The extended end of the threaded rod passing through the rotating push rod is screwed with a threaded cap. The threaded cap abuts against the side wall of the rotating push rod. A pressure roller spring is fixed at the end of the threaded rod away from the threaded cap. The free end of the pressure roller spring is fixedly connected with the side plate by clamping. An insertion rod is inserted into the slot, and a pin passing through the insertion rod is inserted into the side wall of the slot;

[0029] A movable guide wheel rotatably connected to the insertion rod.

[0030] Among them, a through shaft is rotatably connected between the rotating push rod and the movable guide wheel. A pressure roller chute for 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. A locking knob is screwed onto the outside of the rotating push rod, and the extended end of the locking knob abuts against the side wall of the side plate.

[0031] 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.

[0032] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0033] 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.

[0034] 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.

[0035] 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

[0036] Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of the present invention;

[0037] Figure 2 It is a schematic diagram of the front side of the overall mechanism of the second embodiment of the present invention;

[0038] Figure 3 This is a partial structural exploded view of the second embodiment of the present invention;

[0039] Figure 4 It is a cross-sectional view of the abrasive belt assembly in the second embodiment of the present invention;

[0040] Figure 5 is a cross-sectional view of the plug-in slot in the second embodiment of the present invention;

[0041] Figure 6 It is a schematic diagram of the rear side of the overall mechanism in the second embodiment of the present invention;

[0042] Figure 7 Schematic diagram of the front side of the overall mechanism in the third embodiment of the present invention;

[0043] Figure 8 Exploded view of the partial structure in the third embodiment of the present invention;

[0044] Figure 9 Cross-sectional view at the abrasive belt assembly in the third embodiment of the present invention;

[0045] Figure 10 Cross-sectional view at the insertion slot in the third embodiment of the present invention;

[0046] Figure 11 Schematic diagram of the rear side of the overall mechanism in the third embodiment of the present invention;

[0047] Figure 12 Schematic diagram of the front side of the overall mechanism in the fourth embodiment of the present invention;

[0048] Figure 13 Exploded view of the partial structure in the fourth embodiment of the present invention;

[0049] Figure 14 Cross-sectional view at the abrasive belt assembly in the fourth embodiment of the present invention;

[0050] Figure 15 Cross-sectional view at the insertion slot in the fourth embodiment of the present invention;

[0051] Figure 16 Schematic diagram of the rear side of the overall mechanism in the fourth embodiment of the present invention;

[0052] Figure 17 Schematic diagram of the first embodiment of the present invention without the guide roller assembly installed Figure 1 ;

[0053] Figure 18 Schematic diagram of the first embodiment of the present invention without the guide roller assembly installed Figure 2 ;

[0054] Figure 19 Schematic diagram of the first embodiment of the present invention without the guide roller assembly installed Figure 3 ;

[0055] Figure 20 Schematic diagram of the first embodiment of the present invention without the guide roller assembly installed Figure 4 ;

[0056] Figure 21 Schematic diagram of the first embodiment of the present invention without the guide roller assembly installed Figure 5 ;

[0057] Figure 22 Schematic diagram of the first embodiment of the present invention without the guide roller assembly installed Figure 6 。

[0058] Markings in the figure:

[0059] 1. Substrate; 11. Side plate; 12. Insertion slot; 13. Upper retaining shell; 14. Locking handle;

[0060] 2. Component bracket; 21. Bottom plate; 22. Column; 23. Mounting sleeve; 24. Motor;

[0061] 3. Pressure roller assembly; 31. Driving guide wheel; 32. Movable guide wheel; 33. Rotating push rod; 331. Tipping shaft; 332. Slot; 333. Plug; 334. Plug rod; 335. Locking knob; 336. Operating handle; 337. Pressure roller chute; 34. Pressure roller spring; 35. Threaded rod; 36. Threaded cap;

[0062] 4. Sanding belt assembly; 4a. Tapered sanding belt; 4b. Roller sanding belt; 4c. Flat sanding belt;

[0063] 5. Guide roller assembly;

[0064] 5a. Tapered guide roller; 51a. First sleeve rod; 52a. Frame assembly; 53a. Support bolt; 54a. Open slot; 55a. First guide roller; 56a. Bearing;

[0065] 5b. Roller guide roller; 51b. Second sleeve rod; 52b. Extension rod; 53b. First support plate; 54b. Second guide roller;

[0066] 5c. Flat guide roller; 51c. Third sleeve rod; 52c. Adjusting disc; 53c. Vertical plate; 54c. Third guide roller; 55c. Pad; 56c. Second knob; 57c. Guide roller baffle; 58c. Second support plate; 59c. Adjusting slot. Detailed implementation manners

[0067] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to 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.

[0068] Example 1. Refer to Figure 1-22 , a multi-purpose sander, comprising:

[0069] A fixedly installed component bracket 2 and a substrate 1;

[0070] A sanding belt assembly 4, installed inside the substrate 1 and used for sanding workpieces;

[0071] A pressure roller assembly 3, installed on the substrate 1 and used for pressing and driving the sanding belt assembly 4;

[0072] 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;

[0073] 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;

[0074] 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.

[0075] 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;

[0076] 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;

[0077] 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;

[0078] Specifically, two frame components 52a limit the abrasive belt assembly 4, and then the distance between the two frame components 52a is supported by the support bolts 53a. Finally, the abrasive belt assembly 4 is extruded by the first guide roller 55a, and the rotation of the first guide roller 55a is facilitated by two bearings 56a. And through the setting of the opening groove 54a, the installation and limitation of the two bearings 56a on both sides of the first guide roller 55a are facilitated; during use, a working part for grinding is formed above the abrasive belt assembly 4 near the first guide roller 55a, and the workpiece to be processed can be supported by the first support plate 53b of the roller guide roller 5b and the second support plate 58c of the flat guide roller 5c installed on the component bracket 2, facilitating the grinding operation.

[0079] Among them, the roller guide roller 5b includes a second guide roller 54b rotatably connected to the end of the second sleeve rod 51b through a rotating shaft and a first support plate 53b vertically arranged with respect to the arc surface; an extension rod 52b is fixedly connected between the second sleeve rod 51b and the first support plate 53b, and a concave area is provided on the first support plate 53b to cooperate with the second guide roller 54b.

[0080] Specifically, the second guide roller 54b is set as a roller-shaped structure, so that a wheel-shaped surface is formed at the working part for grinding where the roller abrasive belt 4b is close to the first support plate 53b; during use, the workpiece to be processed can be attached above the first support plate 53b, and through the concave area provided 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, facilitating the grinding operation.

[0081] Among them, the flat guide roller 5c includes a vertical plate 53c rotatably installed at the end of the third sleeve rod 51c through a rotating shaft and two third guide rollers 54c rotatably connected to the upper and lower ends of the vertical plate 53c respectively; an adjustment disc 52c is fixedly installed on the side of the vertical plate 53c, and an adjustment groove 59c with the rotating shaft as the arc center is provided on the adjustment disc 52c. A second knob 56c is screwed onto the third sleeve rod 51c and passes through the adjustment groove 59c. A guide roller baffle 57c is installed at the upper third guide roller 54c of the two third guide rollers 54c, and the guide roller baffle 57c is fixedly installed with the vertical plate 53c. A second support plate 58c is fixed on the outside of the third sleeve rod 51c, and a concave area for cooperating with the flat abrasive belt 4c to drive is provided on the second support plate 58c. A backing plate 55c is fixed on the side of the vertical plate 53c.

[0082] Specifically, the setting of the two third guide rollers 54c enables the grinding working part of the flat abrasive 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, thus facilitating the grinding requirements of flat surfaces at various angles. During use, through the setting of the adjustment groove 59c, the adjustment disc 52c, the vertical plate 53c, and the two third guide rollers 54c can be rotated around the rotating shaft. Then, through the setting of the second knob 56c, the rotated adjustment disc 52c can be fixed to the third sleeve rod 51c by the second knob 56c, 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 the grinding operation.

[0083] Among them, the component bracket 2 includes: a bottom plate 21; a vertical column 22 and a motor 24, both fixedly installed above the bottom plate 21; at least two mounting sleeves 23, which are inclined and fixedly installed on the vertical column 22 for cooperating with the insertion of the sleeve rod assembly; the substrate 1 includes: a side plate 11, fixedly installed with the bottom plate 21; an insertion slot 12 opened on the side plate 11 for cooperating with the insertion of the sleeve rod assembly; an upper housing 13, fixedly installed with the side plate 11; a locking handle 14, screwed and installed on the side plate 11 near the insertion slot 12, and the extended end of the locking handle 14 passing through the side wall of the insertion slot 12 is in contact with the sleeve rod assembly in a cooperative manner.

[0084] Specifically, the setting of the bottom plate 21 is used for the fixation and support of each component in the overall sander.

[0085] The setting of the vertical column 22 is used for the installation of at least two mounting sleeves 23.

[0086] The setting of the motor 24 is used to drive the transmission of the abrasive belt assembly 4, further realizing the grinding function of the sander.

[0087] The setting of at least two mounting sleeves 23 is used to cooperate with the insertion of the other 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 sander equipment at the same time, effectively preventing the defect of component loss and facilitating quick replacement during use.

[0088] The setting of the side plate 11 is used to carry the installation of the working sleeve rod assembly and the installation of the pressure roller assembly 3.

[0089] The setting of the insertion slot 12 is used to cooperate with the insertion 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 loosened through the locking handle 14.

[0090] The setting of the upper housing 13 is used to block the area of the abrasive belt assembly 4 that does not need to work, preventing accidental contact by the operator.

[0091] Among them, the pressure roller assembly 3 includes: a driving guide wheel 31 fixedly installed at the output end of the motor 24; a rotating push rod 33 with a turning shaft 331 rotatably connected to the side plate 11 installed in the middle section, a threaded rod 35 inserted and slid at one end, and a slot 332 opened at the other end. The threaded rod 35 passes through the extended end of the rotating push rod 33 and is screwed with a threaded cap 36. The threaded cap 36 abuts against the side wall of the rotating push rod 33. One end of the threaded rod 35 away from the threaded cap 36 is fixed with a pressure roller spring 34, and the free end of the pressure roller spring 34 is fixedly connected to the side plate 11 by clamping. A plug rod 334 is inserted into the slot 332, and a pin 333 passing through the plug rod 334 is inserted into the side wall of the slot 332; a movable guide wheel 32 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. A pressure roller chute 337 for sliding the through shaft is opened on the side plate 11. A control handle 336 is fixedly installed on the rotating push rod 33, and a locking knob 335 is threadedly engaged on the outside of the rotating push rod 33. The extended end of the locking knob 335 abuts against the side wall of the side plate 11;

[0092] Specifically, the output end of the motor 24 drives the driving guide wheel 31 to rotate, further driving the abrasive belt assembly 4 in a transmission relationship with the driving guide wheel 31 to form a transmission effect. The abutment setting of the threaded cap 36 on the rotating push rod 33 can adjust the position through the spiral of the threaded cap 36 on the threaded rod 35, thereby finely adjusting the position of the movable guide wheel 32 at the other end of the rotating push rod 33. Among them, the movable guide wheel 32 also causes the abrasive belt assembly 4 to be pulled and stretched taut; during use, when the pressure roller spring 34 contracts, it can drive the rotating push rod 33 to rotate around the turning shaft 331, further driving the plug rod 334 and the movable guide wheel 32 to slide in the pressure roller chute 337, and finally enabling the movable guide wheel 32 to adjust the tensioning effect of the abrasive belt assembly 4 according to the replacement of the guide roller assembly 5.

[0093] Specifically, the pin 333 is provided to fixedly assemble the plug rod 334 in the slot 332. The control handle 336 is provided for manually adjusting the rotation angle of the rotating push rod 33. The locking knob 335 is provided to limit the rotating push rod 33 on the side plate 11 through the locking knob 335 after the control handle 336 adjusts the angle of the rotating push rod 33. At this time, adjustment is no longer performed through the pressure roller spring 34.

[0094] Example two, referring to Figure 2-6 , when the conical guide roller 5a in the guide roller assembly 5 is installed in the working area of the substrate 1 through the first sleeve rod 51a, correspondingly, the abrasive belt assembly 4 will be squeezed to form a structure of a conical abrasive belt 4a, and at the same time, the roller guide roller 5b and the flat guide roller 5c are respectively installed in the accommodating area of the component bracket 2 through the second sleeve rod 51b and the third sleeve rod 51c;

[0095] Example three, referring toFigure 7-11 When the roller guide 5b in the guide roller assembly 5 is installed in the working area of the substrate 1 through the second sleeve rod 51b, correspondingly, the abrasive belt assembly 4 will be squeezed to form the structure of the roller abrasive belt 4b. At the same time, the tapered guide roller 5a and the flat guide roller 5c are respectively installed in the accommodating area of the component bracket 2 through the first sleeve rod 51a and the third sleeve rod 51c.

[0096] Embodiment 4, refer 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 sleeve rod 51c, correspondingly, the abrasive belt assembly 4 will be squeezed to form the structure of the flat abrasive belt 4c. At the same time, the tapered guide roller 5a and the roller guide 5b are respectively installed in the accommodating area of the component bracket 2 through the first sleeve rod 51a and the second sleeve rod 51b.

[0097] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall 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 the 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 the assembly bracket (2) through the sleeve rod assembly to meet a variety of different sanding requirements. 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; 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 with 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); 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).

2. A multi-purpose sanding machine as claimed in claim 1, 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).

3. A multi-purpose sanding machine as claimed in claim 1, 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 matching the insertion of the sleeve rod assembly.

4. A multi-purpose sanding machine as claimed in claim 3, 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.

5. A multi-purpose sanding machine as claimed in claim 4, 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).

6. A multi-purpose sanding machine as claimed in claim 5, 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).

7. A multi-purpose sanding machine as claimed in claim 6, 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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