Abrasive belt grinding machine

Abstract

The utility model discloses an abrasive belt grinding machine which comprises a machine frame and a transmission mechanism installed on the machine frame, the transmission mechanism comprises a driving wheel and a driven wheel, the driving wheel and the driven wheel are connected through an abrasive belt, the driving wheel is connected with an output shaft of a driving mechanism, and a positioning structure is arranged on the machine frame. A support assembly located on the inner side of the abrasive belt is slidably installed on the positioning structure in the transverse direction, the driven wheel is rotationally installed on the support assembly, and a first elastic piece is arranged between the positioning structure and the support assembly in the transverse direction. The support assembly is arranged on the positioning structure in a sliding mode, the first elastic piece is arranged between the support assembly and the positioning structure, the distance between the driving wheel and the driven wheel is adjusted, the grinding belt can be replaced conveniently, tensioning of the grinding belt can be achieved, and the grinding effect can be automatically adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding equipment, in particular to a belt grinder. Background Art

[0002] Belt grinders are generally suitable for grinding the surface of metal and non-metal parts. They are used in machinery, hardware, die-casting, daily necessities and other fields. They are a widely used processing equipment.

[0003] The conventional grinders on the market that use abrasive belts as consumables have abrasive belts mounted on the driving wheel and the driven wheel. The driving wheel is connected to the output shaft of the handheld drive device to drive the abrasive belt to rotate and grind the parts. The distance between the conventional driving wheel and the driven wheel is fixed and cannot be adjusted, which makes it inconvenient to install and remove the abrasive belt. If the abrasive belt is too close to the parts during use, it is easy to cause damage to the abrasive belt and the parts, which will reduce the service life of the grinder and affect the grinding effect. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the above-mentioned technology and is designed to provide a belt grinder, the specific structure of which is as follows.

[0005] The utility model discloses a belt sander, comprising a frame and a transmission mechanism installed on the frame, wherein the transmission mechanism comprises a driving wheel and a driven wheel, wherein the driving wheel and the driven wheel are connected via a grinding belt, and the driving wheel is connected to the output shaft of a driving mechanism; a positioning structure is provided on the frame, a bracket assembly located on the inner side of the grinding belt is laterally slidably installed on the positioning structure, the driven wheel is rotatably installed on the bracket assembly, and a first elastic member is laterally provided between the positioning structure and the bracket assembly.

[0006] Preferably, the frame is provided with a guide groove, the bracket assembly is provided with a limit screw that passes through the frame and is movably arranged on the guide groove, and the limit screw is provided with an adjustment handle for driving the bracket assembly to slide back and forth on the positioning structure.

[0007] Preferably, the frame is provided with a convex strip located beside the adjusting handle, and a cam portion is provided on the end of the adjusting handle corresponding to the limit screw. The cam portion and the convex strip are rollingly engaged, and the end of the adjusting handle away from the limit screw cooperates with the convex strip to limit the position.

[0008] Preferably, the bracket assembly includes a sliding seat and a bracket, the limit screw is arranged on the sliding seat, the first elastic member is arranged between the positioning structure and the sliding seat, the bracket is movably arranged below the sliding seat along the vertical direction and can rotate in the horizontal direction relative to the sliding seat, the sliding seat is movably provided with an adjustment screw connected to the bracket, and a second elastic member is vertically provided between the bracket and the sliding seat.

[0009] Preferably, a guide pin is vertically arranged between the sliding seat and the bracket, and a guide hole is arranged on the sliding seat or the bracket to flexibly cooperate with the guide pin. The guide pin is movable in the guide hole, so that the sliding seat can rotate left and right within a small range relative to the bracket.

[0010] Preferably, the sliding seat is slidably arranged on the frame.

[0011] Preferably, the positioning structure includes a positioning block and a positioning rod, the positioning block is installed on the frame, the positioning rod is transversely penetrated through the positioning block and is detachably connected to the positioning block, the positioning rod and the sliding seat are provided with receiving grooves relative to each other, the receiving groove of the sliding seat is sleeved on the positioning rod, and the first elastic member is arranged between the two receiving grooves.

[0012] Preferably, the positioning rod is provided with a dust cover connected to the sliding seat.

[0013] Preferably, the frame is provided with a accommodating cavity with one end open, the frame is provided with a through hole connected to the accommodating cavity, the driving wheel is rotatably arranged on the through hole and its part is placed in the accommodating cavity, the positioning structure is arranged in the accommodating cavity, and the bracket assembly and part of the grinding belt are placed in the accommodating cavity.

[0014] Preferably, the frame is provided with a dust suction port connected to the accommodating cavity, and a dust suction pipe is installed on the dust suction port.

[0015] Preferably, the frame is provided with a clamp for clamping the circumferential side wall of the driving mechanism, the clamp is provided with an opening and a locking piece is detachably provided on the opening, and the clamp is located above the driving wheel.

[0016] The utility model describes a belt sander, which can adjust the distance between the driving wheel and the driven wheel by sliding the bracket assembly on the positioning structure and arranging a first elastic member between the two, so as to facilitate the replacement of the sanding belt and realize the tensioning of the sanding belt, thereby automatically adjusting the sanding effect.

[0017] By movably installing the bracket under the sliding seat and arranging a second elastic member between the two, the bracket can be rotated by rotating the adjusting screw, and the assembly error of the bracket can be corrected to ensure that the driven wheel remains in a suitable position with the driving wheel, so that the sanding belt is not easy to fall off during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a belt grinder;

[0019] Figure 2 yes Figure 1 It is an exploded diagram of the grinder;

[0020] Figure 3 It is a top view of the frame and transmission mechanism;

[0021] Figure 4 It is a schematic diagram of the structure when the adjusting handle is rotated;

[0022] Figure 5 yes Figure 3 AA section view;

[0023] Figure 6 It is an exploded schematic diagram of the frame and transmission mechanism;

[0024] Figure 7 It is a structural schematic diagram of the positioning structure and the bracket assembly.

[0025] The reference numerals are as follows:

[0026] 1. frame 1a, guide groove 1b, accommodating cavity, 1c, perforation 1d, dust suction port 11, upper shell 111, first protrusion 112, second protrusion 113, slide rail 114, boss 12, bottom cover 2, transmission mechanism 21, driving wheel 22, driven wheel 23, frosting belt 3, driving mechanism 31, output shaft 4, positioning structure 41, positioning block 42, positioning rod 43, dust cover 5, bracket assembly 51, sliding seat 511, sliding part 51a, side wall 52, bracket 521, positioning plate 53, adjusting screw 54, second elastic member 55, guide pin 6, first elastic member 7, limit screw 8, adjusting handle 81, limit part 9, accommodating groove 10, dust suction pipe 20, clamp 30, locking member 40, positioning seat 401, arc-shaped positioning sheet DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0028] Embodiment 1:

[0029] As attached Figure 1-7As shown, a belt sander described in this embodiment includes a frame 1 and a transmission mechanism 2 installed on the frame 1, the transmission mechanism 2 includes a driving wheel 21 and a driven wheel 22, the driving wheel 21 and the driven wheel 22 are connected by a grinding belt 23, the driving wheel 21 is connected to the output shaft 31 of the driving mechanism 3, a positioning structure 4 is provided on the frame 1, the positioning structure 4 is located in the grinding belt 23, a bracket assembly 5 located in the grinding belt 23 is installed on the positioning structure 4 in a lateral sliding manner, the driven wheel 22 is rotatably installed on the bracket assembly 5, and a first elastic member 6 is provided between the positioning structure 4 and the bracket assembly 5 in a lateral direction. Among them, the first elastic member 6 is a spring arranged in a lateral direction. The driving wheel 21 is movably arranged on the frame 1 and assembled with the output shaft 31 by a threaded connection.

[0030] Preferably, a receiving chamber 1b with an opening at one end is provided on the frame 1, and the guide groove 1a is connected to the receiving chamber 1b; a through hole 1c connected to the receiving chamber 1b is provided on the frame 1, the driving wheel 21 is movably arranged on the through hole 1c and part of it is placed in the receiving chamber 1b, the positioning structure 4 is arranged in the receiving chamber 1b, and the bracket assembly 5 and part of the grinding belt 23 are placed in the receiving chamber 1b.

[0031] In this embodiment, the frame 1 includes an upper shell 11 and a bottom cover 12. The bottom and one end of the upper shell 11 are open. The bottom cover 12 is installed on the bottom of the upper shell 11 and cooperates with it to form a receiving cavity 1b. The upper shell 11 is provided with a through hole 1c.

[0032] Preferably, the frame 1 is provided with a dust suction port 1d connected to the accommodating chamber 1b, and the dust suction port 1d is installed with a dust suction pipe 10. During the grinding process, the dust generated during the grinding process entering the accommodating chamber 1b is sucked by connecting the dust suction pipe 10 to the dust suction device.

[0033] The dust suction port 1d is arranged on the side wall of the upper shell 11, and the dust suction pipe 10 is detachably mounted on the upper shell 11. In this embodiment, the dust suction pipe 10 and the upper shell 11 are connected by a rotating clamping method. In other embodiments, they can also be connected by a threaded connection.

[0034] like Figure 1 , 3 -4, preferably, a guide groove 1a is provided on the frame 1, and a limit screw 7 is provided on the bracket assembly 5, which is penetrated through the frame 1 and movably arranged on the guide groove 1a. The limit screw 7 is provided with an adjustment handle 8 for driving the bracket assembly 5 to slide back and forth on the positioning structure 4, so that the length of the bracket assembly 5 extending out of the accommodating cavity 1b can be adjusted, so as to facilitate the installation and disassembly of the sanding belt 23 and the automatic tensioning of the sanding belt 23.

[0035] The frame 1 is provided with a convex strip 112 located beside the adjusting handle 8, and a cam portion 81 is provided on the end of the adjusting handle 8 corresponding to the limit screw 7. The cam portion 81 and the convex strip 112 are rollingly matched, and the end of the adjusting handle 8 away from the limit screw 7 cooperates with the convex strip 112 to limit.

[0036] By rotating the adjustment handle 8, the convex strip 112 contacts different positions of the elliptical protrusion, and the elliptical protrusion is used as a fulcrum to change the relative distance between the corresponding end of the adjustment handle 8 and the convex strip 112, thereby adjusting the relative position between the positioning structure 4 and the bracket assembly 5. The cam portion 81 cooperates with the convex strip 112 to adjust and fix the position of the adjustment handle 8, and the sanding belt 23 can be installed and removed alone without holding the adjustment handle 8 at the same time.

[0037] In this embodiment, the cam portion 81 is a nearly elliptical protrusion disposed at the bottom of one end of the adjustment handle 8. The frame 1 is provided with a first protrusion 111 inclined relative to the second protrusion 112, and the end of the adjustment handle 8 that is away from the limit screw 7 is rotatably disposed between the first protrusion 111 and the protrusion 112, and the rotation angle of the adjustment handle 8 is an acute angle. The protrusion 112 is located between the adjustment handle 8 and the adjustment screw 53.

[0038] like Figure 5-7 As shown, preferably, the bracket assembly 5 includes a sliding seat 51 and a bracket 52, the limit screw 7 is arranged on the sliding seat 51, the first elastic member 6 is arranged between the positioning structure 4 and the sliding seat 51, the bracket 52 is movably arranged below the sliding seat 51 in the vertical direction and can rotate relative to the sliding seat 51 in the horizontal direction, the sliding seat 51 is movably provided with an adjustment screw 53 connected to the bracket 52, and a second elastic member 54 is vertically provided between the bracket 52 and the sliding seat 51. A guide pin 55 is vertically provided between the sliding seat 51 and the bracket 52, and a guide hole movably matched with the guide pin 55 is provided on the sliding seat 51 or the bracket 52.

[0039] In this embodiment, the adjusting screw 53 is passed through the sliding seat 51 and is threadedly connected to the bracket 52, so as to realize the movable connection between the sliding seat 51 and the bracket 52 and lock the positions of the two. The guide pin 55 is fixed on the sliding seat 51, and the bracket 52 is provided with a guide hole. The second elastic member 54 is a spring arranged in the vertical direction, and the sliding seat 51 is provided with a side wall 51a arranged to keep a distance from the end of the bracket 52.

[0040] Preferably, the sliding seat 51 is slidably disposed on the frame 1 .

[0041] In this embodiment, convex strips are arranged on the inner top surface of the upper shell 11 to form a slide rail 113, and a sliding portion 511 is arranged on the top of the slide seat 51 to slide with the slide rail 113 to guide the movement direction of the slide seat 51. A positioning plate 521 is arranged on one side of the bracket 52 to abut against the sanding belt 23.

[0042] Preferably, the positioning structure 4 includes a positioning block 41 and a positioning rod 42. The positioning block 41 is installed on the upper shell 11 and the bottom cover 12 of the frame 1 by screws. The positioning rod 42 is transversely penetrated on the positioning block 41 and is detachably connected to the positioning block 41 by screws. The positioning rod 42 and the sliding seat 51 are provided with receiving grooves 9 opposite to each other. The receiving groove 9 of the sliding seat 51 is sleeved on the positioning rod 42, and the first elastic member 6 is provided between the two receiving grooves 9. The positioning rod 42 is sleeved with a dust cover 43 connected to the sliding seat 51, wherein the dust cover 43 is sleeved with the sliding seat 51.

[0043] In this embodiment, the positioning block 41 is disposed between the upper shell 11 and the bottom cover 12. The sliding seat 51 and the bracket 52 are partially located in the accommodating cavity 1b, and the adjusting screw 53 is located outside the accommodating cavity 1b.

[0044] like Figure 1 , 2 As shown, preferably, a clamp 20 for clamping the circumferential side wall of the driving mechanism 3 is provided on the frame 1 , an opening is provided on the clamp 20 and a locking member 30 is detachably provided on the opening, and the clamp 20 is located above the driving wheel 21 .

[0045] In this embodiment, a boss 114 is provided on the upper surface of the upper shell 11 and is located next to the through hole 1c. A positioning seat 40 is installed on the boss 114. An arc-shaped positioning piece 401 is provided on the positioning seat 40. A portion of the inner wall of the clamp 20 is fixed on the arc-shaped positioning piece 401.

[0046] By rotating the adjusting handle 8 , the limit screw 7 slides along the guide groove 1 a , and the sliding seat 51 slides on the positioning rod 42 , so that the driven wheel 22 cooperates with the driving wheel 21 to tighten or loosen the sanding belt 23 .

[0047] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. A belt sander, comprising a frame (1) and a transmission mechanism (2) mounted on the frame (1), the transmission mechanism (2) comprising a driving wheel (21) and a driven wheel (22), the driving wheel (21) and the driven wheel (22) being connected via a grinding belt (23), the driving wheel (21) being connected to an output shaft (31) of a driving mechanism (3), characterized in that: The frame (1) is provided with a positioning structure (4), a bracket assembly (5) located on the inner side of the sanding belt (23) is slidably mounted on the positioning structure (4) in a transverse direction, the driven wheel (22) is rotatably mounted on the bracket assembly (5), and a first elastic member (6) is provided between the positioning structure (4) and the bracket assembly (5) in a transverse direction.

2. The belt sander according to claim 1, characterized in that: The frame (1) is provided with a guide groove (1a), the bracket assembly (5) is provided with a limit screw (7) which is passed through the frame (1) and movably arranged on the guide groove (1a), and the limit screw (7) is provided with an adjustment handle (8) for driving the bracket assembly (5) to slide back and forth on the positioning structure (4).

3. The belt sander according to claim 2, characterized in that: The frame (1) is provided with a convex strip (112) located beside the adjusting handle (8); a cam portion (81) is provided on one end of the adjusting handle (8) corresponding to the limit screw (7); the cam portion (81) and the convex strip (112) are rollingly matched; and the end of the adjusting handle (8) away from the limit screw (7) is limited by the convex strip (112).

4. The belt sander according to claim 2, characterized in that: The bracket assembly (5) comprises a sliding seat (51) and a bracket (52), the limit screw (7) is arranged on the sliding seat (51), the first elastic member (6) is arranged between the positioning structure (4) and the sliding seat (51), the bracket (52) is arranged below the sliding seat (51) in a vertically movable manner and can rotate relative to the sliding seat (51) in a horizontal direction, the sliding seat (51) is movably provided with an adjusting screw (53) connected to the bracket (52), and a second elastic member (54) is arranged vertically between the bracket (52) and the sliding seat (51).

5. The belt sander according to claim 4, characterized in that: A guide pin (55) is vertically arranged between the sliding seat (51) and the bracket (52), and a guide hole movably matched with the guide pin (55) is arranged on the sliding seat (51) or the bracket (52).

6. The belt sander according to claim 4, characterized in that: The sliding seat (51) is slidably arranged on the frame (1).

7. The belt sander according to any one of claims 4 to 6, characterized in that: The positioning structure (4) comprises a positioning block (41) and a positioning rod (42); the positioning block (41) is mounted on the frame (1); the positioning rod (42) is transversely passed through the positioning block (41) and is detachably connected to the positioning block (41); the positioning rod (42) and the sliding seat (51) are provided with accommodating grooves (9) opposite to each other; the accommodating groove (9) of the sliding seat (51) is sleeved on the positioning rod (42); and the first elastic member (6) is provided between the two accommodating grooves (9).

8. The belt sander according to claim 7, characterized in that: The positioning rod (42) is sleeved with a dust cover (43) connected to the sliding seat (51).

9. The belt sander according to claim 1, characterized in that: The frame (1) is provided with a receiving cavity (1b) with one end open, the frame (1) is provided with a through hole (1c) connected to the receiving cavity (1b), the driving wheel (21) is rotatably arranged on the through hole (1c) and part of it is placed in the receiving cavity (1b), the positioning structure (4) is arranged in the receiving cavity (1b), and parts of the bracket assembly (5) and the grinding belt (23) are placed in the receiving cavity (1b).

10. The belt sander according to any one of claims 1 to 6 and 9, characterized in that: The frame (1) is provided with a clamp (20) for clamping the circumferential side wall of the driving mechanism (3), the clamp (20) is provided with an opening and a locking member (30) is detachably provided on the opening, and the clamp (20) is located above the driving wheel (21).

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