Belt sander

Abstract

The utility model discloses a belt sander which comprises a driving main machine, and the driving main machine comprises a machine shell assembly and a driving motor. The grinding device is characterized by further comprising a grinding assembly. The two sets of grinding assemblies are named as a fine sand belt grinding assembly and a round pipe grinding assembly according to different functions of the grinding assemblies. The two sets of polishing assemblies can be rapidly detached and fixedly arranged on the driving main machine, and the driving main machine drives the polishing assemblies to conduct polishing operation. In order to conveniently connect the polishing assemblies, a mounting part protruding leftwards is arranged on the left side of the upper portion of the machine shell assembly, and the two polishing assemblies can be rapidly detached and fixedly arranged on the mounting part.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a multifunctional sanding belt machine. Background Art

[0002] Belt sanders are an important power tool. Handheld electric belt sanders are commonly used for sanding surfaces such as wood and metal. Existing belt sanders typically consist of a housing, a transmission assembly, and a sanding assembly. The housing houses a drive motor, which is provided with a handle for holding the belt sander during operation. The drive motor drives the sanding belt in the sanding assembly through the transmission assembly to perform sanding.

[0003] Chinese patent document CN114800188B discloses a quickly detachable electric belt sander, which is composed of at least a drive unit, a mounting unit, and a working unit. The drive unit mainly includes a drive motor that provides power. The drive motor is correspondingly arranged in a motor housing 1. The motor housing 1 is partially extended and is equipped with a handle 2 and a foot 3 at the distal end of the handle 2, which is used in conjunction with a power supply. The mounting unit is composed of a mounting housing 4, which is a structure of a main housing 402 and a detachable end cover 401. Figure 2 This is a structure where the end cap 401 is open, creating a storage space within. After the main housing 402 is connected to the motor housing 1, the motor's output shaft is located within the mounting housing 4. This allows the working unit to be assembled to drive the abrasive belt for sanding. This structure is relatively simple and is not suitable for sanding round pipes. Furthermore, its angle remains fixed.

[0004] Chinese patent document CN214135422U discloses an adjustable handheld sanding machine. The structure includes a handheld portion 1, which is provided with a drive mechanism inside. The handheld portion 1 has a power cord 2 connected to the drive mechanism at one end and an operating support rod 3 fixed to the other end. The operating support rod 3 is provided with a driving wheel 4 connected to the drive mechanism at the connection with the handheld portion 1. A driven wheel 5 is provided at the end of the operating support rod 3 away from the driving wheel 4. An annular sanding belt 6 is provided on the driving wheel 4 and the driven wheel 5. The driving wheel 4 is driven by a driving motor to rotate. The driving wheel 4 drives the driven wheel 5 to rotate through the annular sanding belt 6. The outer side of the annular sanding belt 6 is a grinding surface. This structure is suitable for grinding curved surfaces such as circular pipes, but its function is relatively simple. Utility Model Content

[0005] The utility model aims to provide a sanding belt machine with a simple structure and capable of replacing different sanding components.

[0006] The basic technical solution for achieving the objectives of this utility model is a belt sander comprising a main drive unit, which includes a housing assembly and a drive motor. Its structural features include a grinding assembly. These two grinding assemblies comprise two groups, designated as a fine-belt grinding assembly and a round tube grinding assembly, respectively, based on their respective functions. Both grinding assemblies can be quickly removed and fixed to the main drive unit, which drives the grinding assemblies to perform the grinding operation.

[0007] Furthermore, in order to facilitate the connection of the grinding assembly: a mounting portion protruding to the left is provided on the left side of the upper portion of the casing assembly, and both sets of grinding assemblies can be quickly disassembled and fixed on the mounting portion.

[0008] Furthermore, to enhance the firmness of the mounting portion, a motor shaft bearing is provided in the mounting portion. The drive motor is fixedly mounted in the upper portion of the housing assembly, and its motor shaft is rotatably mounted on the housing assembly via the motor shaft bearing in the mounting portion, extending to the left outside the mounting portion 1, and a drive wheel is provided on the motor shaft.

[0009] Furthermore, to facilitate installation, the fine-abrasive belt sanding assembly includes a first connecting seat, a tensioning device, a driven wheel, and a fine-abrasive belt. The first connecting seat is provided with a clamping connection, which is provided with a connection hole. The clamping connection is provided with an adjustment slot extending radially through the inside and outside of the clamping connection, and the width of the adjustment slot is adjusted using a quick-release screw. The clamping connection is sleeved onto the mounting portion of the housing assembly, the drive wheel extends into the first connecting seat, and the clamping connection is then clamped and secured to the mounting portion using a quick-release screw. The tensioning device is fixedly mounted on the first connecting seat, the driven wheel is rotatably mounted on the tensioning device, and the fine-abrasive belt is arranged around the driven wheel and the drive wheel.

[0010] Furthermore, to enhance post-installation reliability, the clamping connection of the fine-belt sanding assembly is provided with radially outwardly protruding positioning features. The handle of the quick-release screw of the fine-belt sanding assembly is provided with a positioning groove. The positioning groove of the handle of the quick-release screw of the fine-belt sanding assembly cooperates with the positioning feature to prevent the quick-release screw from rotating and loosening.

[0011] Furthermore, to facilitate installation, the round tube grinding assembly includes a second connecting base, an adjustment arm, a second driven wheel, and an abrasive belt. The second connecting base is provided with a second clamping connection, which has a connection hole and a second adjustment slot extending radially through the second clamping connection. The width of the second adjustment slot is adjusted using a second quick-release screw. The second clamping connection is mounted on the mounting portion of the housing assembly. The drive wheel extends into the second connecting base and is then clamped to the mounting portion using a second quick-release screw. The adjustment arm is rotatably mounted on the second connecting base, with a torsion spring interposed between the adjustment arm and the second connecting base. An auxiliary driven wheel is mounted on the rotating shaft of the adjustment arm. The second driven wheel is rotatably mounted on the adjustment arm. The abrasive belt is arranged around the second driven wheel, the auxiliary driven wheel, and the drive wheel. The torsion spring expands the adjustment arm and the second connecting base to ensure belt tension. A drive motor drives the abrasive belt through the drive wheel to grind the round tube.

[0012] Furthermore, to enhance post-installation reliability, the second clamping connection portion of the tube grinding assembly is provided with a second radially outwardly protruding positioning portion. The handle of the second quick-release screw of the tube grinding assembly is provided with a second positioning groove, which cooperates with the positioning portion to prevent the second quick-release screw from rotating loose.

[0013] The present invention has the following beneficial effects: (1) The sanding belt machine of the present invention has a simple structure and can replace different sanding components to meet the needs of different sanding surfaces. It has a wide range of applications and can reduce investment costs. (2) The housing component of the sanding belt machine of the present invention is provided with a mounting portion, and a bearing is provided in the mounting portion. When the sanding component is clamped and fixed, the supporting strength of the mounting portion can be improved to ensure a firm fixation. At the same time, it is also conducive to adapting to sanding at various angles. (3) The clamping connection part of the sanding belt machine of the present invention is provided with a positioning part, and the handle of the quick-release screw is provided with a corresponding positioning groove, which can prevent the quick-release screw from rotating and loosening, thereby ensuring a good fixed connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a structural schematic diagram of a sanding belt machine used for fine sanding belt grinding components.

[0015] Figure 2 for Figure 1 Schematic diagram of the right side.

[0016] Figure 3 For Figure 1 Schematic diagram when viewed from the upper right front.

[0017] Figure 4 The utility model is a structural schematic diagram of a sanding belt machine used for round tube grinding components.

[0018] Figure 5 for Figure 4 Schematic diagram of the right side.

[0019] Figure 6 For Figure 4 Schematic diagram when viewed from the upper right front.

[0020] Figure 7 This is a schematic structural diagram of the driving host of the sanding belt machine of the utility model.

[0021] Figure 8 Schematic diagram of the structure of the fine belt grinding component.

[0022] Figure 9 This is a schematic diagram of the structure of the round tube grinding assembly.

[0023] The reference numerals in the accompanying drawings are:

[0024] Driving host 1, housing assembly 1-1, mounting portion 1-11, motor heat dissipation hole 1-12, grip portion 1-13, battery seat connection portion 1-14, driving motor 1-2, driving wheel 1-21, operating switch 1-3,

[0025] Grinding assembly 2, fine sand belt grinding assembly 2a, first connecting seat 2a-1, clamping connection part 2a-11, adjustment groove 2a-12, positioning part 2a-13, tensioning device 2a-2, driven wheel 2a-3, fine sand belt 2a-4, quick release screw 2a-5, positioning groove 2a-51,

[0026] Round tube grinding assembly 2b,

[0027] Second connecting seat 2b-1, second clamping connecting part 2b-11, second adjusting slot 2b-12, second positioning part 2b-13, adjusting arm 2b-2, second driven wheel 2b-3, sanding belt 2b-4, second quick release screw 2b-5, second positioning slot 2b-51, torsion spring 2b-6, auxiliary driven wheel 2b-7. DETAILED DESCRIPTION

[0028] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings. Figure 2 The direction shown is carried out, that is, Figure 2 The up, down, left, and right directions shown are the up, down, left, and right directions described. Figure 1 The direction is forward, away from Figure 2 The terms "upper", "lower", "left", "right" and the like indicating directions or positional relationships are based on the positional relationships described in the accompanying drawings and are only used to facilitate the description of the present invention or to simplify the description, and do not indicate a specific direction that must be possessed.

[0029] (Example 1)

[0030] See Figures 1 to 9 The multifunctional belt sander of the present invention includes a driving main unit 1 and a grinding component 2. The grinding component 2 can be quickly disassembled and fixedly mounted on the driving main unit 1, and the driving main unit 1 drives the grinding component 2 to perform grinding operations. The driving main unit 1 includes a casing component 1-1 and a driving motor 1-2. A mounting portion 1-11 protruding to the left is provided on the left side of the upper portion of the casing component 1-1, and a motor shaft bearing is provided in the mounting portion 1-11. The driving motor 1-2 is fixedly mounted in the upper portion of the casing component 1-1, and its motor shaft is rotatably mounted on the casing component 1-1 through the motor shaft bearing in the mounting portion 1-11, and extends to the left outside the mounting portion 1-11, and a driving wheel 1-21 is provided on the motor shaft. A motor heat dissipation hole 1-12 is provided on the upper portion of the casing component 1-1. An operating switch 1-3 is provided in the middle portion of the casing component 1-1. A grip portion 1-13 is provided at the lower portion of the housing assembly 1-1, and a battery seat connection portion 1-14 is provided at the lower end of the grip portion 1-13 for installing a corresponding battery, which is used to power the drive motor 1-2.

[0031] There are two groups of grinding assemblies 2, which are respectively called fine sand belt grinding assemblies 2a and round tube grinding assemblies 2b according to their different functions.

[0032] See Figures 1 to 3 、 Figure 7 and Figure 8The fine abrasive belt grinding assembly 2a includes a first connecting seat 2a-1, a tensioning device 2a-2, a driven wheel 2a-3, and a fine abrasive belt 2a-4. The first connecting seat 2a-1 is provided with a clamping connection portion 2a-11, which is provided with a connecting hole. The clamping connection portion 2a-11 is provided with an adjustment groove 2a-12 extending radially through the inside and outside of the clamping connection portion 2a-11. The adjustment groove 2a-12 is connected to the connecting hole, and the width of the adjustment groove 2a-12, that is, the diameter of the connecting hole of the clamping connection portion 2a-11, is adjusted by a quick-release screw 2a-5. The clamping connection portion 2a-11 is provided with an outwardly protruding positioning portion 2a-13 along its radial direction. The handle of the quick-release screw 2a-5 is provided with a positioning groove 2a-51. During installation, the clamping connection portion 2a-11 is placed over the mounting portion 1-11 of the housing assembly 1-1. The drive wheel 1-21 extends into the first connection seat 2a-1. The clamping connection portion 2a-11 is then clamped and fixed to the mounting portion 1-11 using the quick-release screw 2a-5. The positioning groove 2a-51 of the handle of the quick-release screw 2a-5 is then engaged with the positioning portion 2a-13, thereby preventing the quick-release screw 2a-5 from rotating and loosening, ensuring a secure connection. The tensioning device 2a-2 is fixedly mounted on the first connection seat 2a-1. The driven wheel 2a-3 is rotatably mounted on the tensioning device 2a-2. The fine abrasive belt 2a-4 is arranged around the driven wheel 2a-3 and the drive wheel 1-21. The tension of the fine abrasive belt 2a-4 is adjusted by the tensioning device 2a-2. The fine abrasive belt 2a-4 is rotated by the drive motor 1-2 via the drive wheel 1-21 to perform the grinding operation.

[0033] See Figures 1 to 3 、 Figure 7 and Figure 9 The round tube grinding assembly 2b includes a second connecting seat 2b-1, an adjustment arm 2b-2, a second driven wheel 2b-3, and a sanding belt 2b-4. The second connecting seat 2b-1 is provided with a second clamping connection portion 2b-11, which is provided with a connection hole. The second clamping connection portion 2b-11 is provided with a second adjustment groove 2b-12 running through the inside and outside of the second clamping connection portion 2b-11 along its radial direction. The width of the second adjustment groove 2b-12, that is, the aperture of the connection hole of the second clamping connection portion 2b-11, is adjusted by a second quick-release screw 2b-5. The second clamping connection portion 2b-11 is provided with a second positioning portion 2b-13 protruding outward along its radial direction. The handle of the second quick-release screw 2b-5 is provided with a second positioning groove 2b-51.

[0034] During installation, the second clamping connection part 2b-11 is put on the mounting part 1-11 of the casing assembly 1-1, the driving wheel 1-21 is extended into the second connecting seat 2b-1, and then the second clamping connection part 2b-11 is clamped and fixed on the mounting part 1-11 through the second quick-release screw 2b-5, and then the second positioning groove 2b-51 of the handle of the second quick-release screw 2b-5 is clamped on the second positioning part 2b-13, so as to prevent the second quick-release screw 2b-5 from rotating loose and ensuring a good fixed connection.

[0035] An adjustment arm 2b-2 is rotatably mounted on the second connecting base 2b-1. A torsion spring 2b-6 is interposed between the adjustment arm 2b-2 and the second connecting base 2b-1. An auxiliary driven wheel 2b-7 is mounted on the rotation axis of the adjustment arm 2b-2. A second driven wheel 2b-3 is rotatably mounted on the adjustment arm 2b-2. An abrasive belt 2b-4 is disposed around the second driven wheel 2b-3, the auxiliary driven wheel 2b-7, and the drive wheel 1-21. The torsion spring 2b-6 maintains tension between the adjustment arm 2b-2 and the second connecting base 2b-1, thereby ensuring the tension of the abrasive belt 2b-4. A drive motor 1-2, via the drive wheel 1-21, drives the abrasive belt 2b-4 to rotate, thereby grinding the pipe.

[0036] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A belt sander, comprising a driving main unit (1), wherein the driving main unit (1) comprises a housing assembly (1-1) and a driving motor (1-2); characterized in that: The invention also includes a grinding assembly (2); the grinding assembly (2) has two groups, and the two groups of grinding assemblies (2) are respectively called fine sand belt grinding assemblies (2a) and round tube grinding assemblies (2b) according to their different functions; the two groups of grinding assemblies (2) can be quickly disassembled and fixedly arranged on the driving main unit (1), and the driving main unit (1) drives the grinding assemblies (2) to perform the grinding operation.

2. The belt sander according to claim 1, characterized in that: A mounting portion (1-11) protruding to the left is provided on the left side of the upper portion of the casing assembly (1-1), and both sets of grinding assemblies (2) can be quickly disassembled and fixedly mounted on the mounting portion (1-11).

3. The belt sander according to claim 2, characterized in that: A motor shaft bearing is provided in the mounting portion (1-11); the drive motor (1-2) is fixedly provided in the upper portion of the housing assembly (1-1); its motor shaft is rotatably provided on the housing assembly (1-1) via the motor shaft bearing in the mounting portion (1-11) and extends to the left outside the mounting portion (1-11); and a drive wheel (1-21) is provided on the motor shaft.

4. The belt sander according to claim 3, characterized in that: The fine sand belt grinding assembly (2a) comprises a first connecting seat (2a-1), a tensioning device (2a-2), a driven wheel (2a-3) and a fine sand belt (2a-4); the first connecting seat (2a-1) is provided with a clamping connection portion (2a-11), the clamping connection portion (2a-11) is provided with a connection hole, and the clamping connection portion (2a-11) is provided with an adjustment groove (2a-12) running through the inside and outside of the clamping connection portion (2a-11) along its radial direction, and the width of the adjustment groove (2a-12) is adjusted by a quick-release screw (2a-5); the clamping connection portion (2a-11) The drive wheel (1-21) is sleeved on the mounting portion (1-11) of the housing assembly (1-1), and the drive wheel (1-21) extends into the first connecting seat (2a-1). Then, the clamping connecting portion (2a-11) is clamped and fixed to the mounting portion (1-11) via a quick-release screw (2a-5); the tensioning device (2a-2) is fixedly arranged on the first connecting seat (2a-1), the driven wheel (2a-3) is rotatably arranged on the tensioning device (2a-2), and the fine sanding belt (2a-4) is arranged around the driven wheel (2a-3) and the drive wheel (1-21).

5. The belt sander according to claim 4, characterized in that: A clamping connection portion (2a-11) of the fine sand belt grinding assembly (2a) is provided with a positioning portion (2a-13) protruding outward along its radial direction; a positioning groove (2a-51) is provided on the handle of the quick-release screw (2a-5) of the fine sand belt grinding assembly (2a); and the positioning groove (2a-51) of the handle of the quick-release screw (2a-5) of the fine sand belt grinding assembly (2a) cooperates with the positioning portion (2a-13) to prevent the quick-release screw (2a-5) from rotating and loosening.

6. The belt sander according to claim 3, characterized in that: The round tube grinding assembly (2b) comprises a second connecting seat (2b-1), an adjusting arm (2b-2), a second driven wheel (2b-3) and a sanding belt (2b-4); a second clamping connecting portion (2b-11) is provided on the second connecting seat (2b-1), the second clamping connecting portion (2b-11) is provided with a connecting hole, and the second clamping connecting portion (2b-11) is provided with a second adjusting groove (2b-12) running through the inside and outside of the second clamping connecting portion (2b-11) along its radial direction, and the width of the second adjusting groove (2b-12) is adjusted by a second quick-release screw (2b-5); the second clamping connecting portion (2b-11) is sleeved on the mounting portion (1-11) of the housing assembly (1-1), the driving wheel (1-21) extends into the second connecting seat (2b-1), and then the second clamping connecting portion (2b-11) is clamped by the second quick-release screw (2b-5). The invention is fixed on the mounting portion (1-11); the adjusting arm (2b-2) is rotatably mounted on the second connecting seat (2b-1); a torsion spring (2b-6) is provided between the adjusting arm (2b-2) and the second connecting seat (2b-1); an auxiliary driven wheel (2b-7) is provided on the rotating shaft of the adjusting arm (2b-2); the second driven wheel (2b-3) is rotatably mounted on the adjusting arm (2b-2); the sanding belt (2b-4) is arranged around the second driven wheel (2b-3), the auxiliary driven wheel (2b-7) and the driving wheel (1-21); the adjusting arm (2b-2) and the second connecting seat (2b-1) are opened by the torsion spring (2b-6), thereby ensuring the tension of the sanding belt (2b-4); and the driving motor (1-2) drives the sanding belt (2b-4) to rotate via the driving wheel (1-21) to perform a grinding operation on the round pipe.

7. The belt sander according to claim 6, characterized in that: The second clamping connection portion (2b-11) of the round tube grinding assembly (2b) is provided with a second positioning portion (2b-13) protruding outward along its radial direction; a second positioning groove (2b-51) is provided on the handle of the second quick-release screw (2b-5) of the round tube grinding assembly (2b); the second positioning groove (2b-51) of the handle of the second quick-release screw (2b-5) of the round tube grinding assembly (2b) cooperates with the second positioning portion (2b-13) to prevent the second quick-release screw (2b-5) from rotating and loosening.

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