Belt type grinding machine

Abstract

The utility model provides a belt type grinding machine which comprises a base, a telescopic support is arranged at one end of the base, a box body is fixedly arranged at the front end of the support, a groove penetrating through the bottom of the box body is formed in the box body, the groove is formed in the length direction of the box body and penetrates through the front end of the box body, a driving wheel is arranged at the rear end of the groove, and the driving wheel is erected on a rotating shaft. One end of the rotating shaft penetrates through the box wall and is connected with the output end of the first motor; the driving wheel is connected with the driven wheel through the abrasive belt so that the abrasive belt can be closed, the driven wheel is arranged on the installation frame, the installation frame is arranged at the front end of the groove, a lifting mechanism capable of adjusting the height of the installation frame is movably arranged at the upper end of the installation frame, and a tensioning mechanism is further arranged in the groove. The abrasive belt on the driven wheel can be made to get close to a workpiece preliminarily, the driven wheel is made to ascend and descend finely through the lifting mechanism, and therefore secondary lifting is achieved, the driven wheel is made to grind the workpiece accurately, and the finishing effect of the procedure is achieved.

Description

Technical Field

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

[0002] A grinder is a machine tool that uses abrasive tools to grind the surface of a workpiece. Most grinders use high-speed rotating grinding wheels for grinding, while a few use other grinding tools such as oilstones and abrasive belts and free abrasives for processing, such as honing machines, superfinishing machines, belt grinders, grinders and polishers. Grinding machines can process materials with higher hardness, such as hardened steel, cemented carbide, etc.; they can also process brittle materials, such as glass and granite. Grinding machines can perform high-precision grinding with very small surface roughness, and can also perform high-efficiency grinding, such as high-power grinding.

[0003] Most of the existing technologies using abrasive belts for grinding use a driving wheel and a driven wheel to drive the rotation of the abrasive belt. However, since the position of the driven wheel is fixed and can only be raised and lowered once during use, fine adjustment cannot be made during grinding. Sudden height adjustment causes the abrasive belt to suddenly touch the workpiece, which can easily cause excessive wear of the abrasive belt. Utility Model Content

[0004] The utility model aims to provide a belt grinder to solve the problems in the background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A belt grinder comprises a base, one end of which is provided with a retractable bracket, a box body is fixedly provided at the front end of the bracket, a groove penetrating the bottom of the box body is provided in the box body, the groove is provided along the length direction of the box body and penetrates the front end of the box body, a driving wheel is provided at the rear end of the groove, the driving wheel is mounted on a rotating shaft, one end of the rotating shaft penetrates the box body wall and is connected to the output end of a first motor; the driving wheel is connected to the driven wheel through the sanding belt to form a closed sanding belt, the driven wheel is arranged on a mounting frame, the mounting frame is arranged at the front end of the groove, a lifting mechanism capable of adjusting the height of the mounting frame is movably provided on the upper end of the mounting frame, and a tensioning mechanism is also provided in the groove.

[0007] Furthermore, a hydraulic cylinder is provided on the base at the rear end of the box body, and the upper end of the hydraulic cylinder abuts against the box body.

[0008] Furthermore, side grooves are provided on both sides of the front end of the groove, sliding rods are provided in the side grooves, and the mounting frame includes a linear bearing sleeved on the sliding rod, a fixed rod and a fixed shaft are provided between the linear bearings, the fixed shaft is located below the fixed rod, and the driven wheel frame is arranged on the fixed shaft.

[0009] Furthermore, the lifting mechanism includes a turntable arranged at the upper end of the box and a threaded rod fixed to the lower end of the turntable, the threaded rod is threadedly connected to the box and passes through the box, the lower end of the threaded rod is fixedly connected to a rotating block, and the rotating block is embedded in a movable groove connected to the fixed rod.

[0010] Furthermore, the tensioning device includes a tensioning wheel arranged between the driving wheel and the driven wheel, the tensioning wheel is sleeved on the movable rod, both ends of the movable rod pass through the box wall and are mounted in a movable hole on the box wall, and the box wall is provided with positioning seats at the upper and lower ends of the movable hole, and the positioning seat is threaded with a fastening rod, and the fastening rods at the upper and lower ends of the movable hole are symmetrical up and down along the center of the movable hole.

[0011] Furthermore, a second motor is arranged in the base, an output end of the second motor is connected to an output shaft, the output shaft is connected to a movable disk, and the movable disk is arranged on the upper surface of the base.

[0012] After adopting the above technical solution, the utility model has the following beneficial effects:

[0013] The belt grinder of the utility model can lift the box body through the hydraulic cylinder, so that the abrasive belt on the driven wheel can be initially brought close to the workpiece, and then the driven wheel can be finely lifted and lowered through the lifting mechanism, thereby realizing secondary lifting to enable the driven wheel to grind the workpiece accurately, and preventing the abrasive belt from suddenly touching the workpiece due to only one sudden height adjustment, which may easily cause excessive wear of the abrasive belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the external structure of a belt grinder according to an embodiment of the utility model;

[0015] Figure 2 It is an internal front view of a box body of a belt grinder according to an embodiment of the utility model;

[0016] Figure 3 It is a side view of a box body of a belt grinder according to an embodiment of the utility model.

[0017] In the figure:

[0018] Base-1, bracket-2, box-3, groove-4, driving wheel-5, first motor-6, driven wheel-7, hydraulic cylinder-8, side groove-9, sliding rod-10, linear bearing-11, fixed rod-12, fixed shaft-13, turntable-14, threaded rod-15, rotating block-16, movable groove-17, tensioning wheel-18, movable hole-19, positioning seat-20, fastening rod-21, second motor-22, movable disk-23, movable rod-24. DETAILED DESCRIPTION

[0019] In order to further explain the technical solution of the present utility model, specific embodiments are described in detail below with reference to the accompanying drawings.

[0020] Reference Figure 1-3 The utility model provides a belt grinder, including a base 1, a bracket 2 is arranged at one end of the base 1, a box 3 is fixedly arranged at the front end of the bracket 2, a groove 4 is arranged in the box 3 and passes through the bottom of the box 3, the groove 4 is arranged along the length direction of the box 3 and passes through the front end of the box 3, a driving wheel 5 is arranged at the rear end of the groove 4, the driving wheel 5 is mounted on a rotating shaft, one end of the rotating shaft passes through the wall of the box 3 and is connected to the output end of a first motor 6; the driving wheel 5 is connected to a driven wheel 7 through a sand belt to form a closed sand belt, the driven wheel 7 is arranged on a mounting frame, the mounting frame is arranged at the front end of the groove 4, and a lifting mechanism for adjusting the height of the mounting frame is movably arranged on the upper end of the mounting frame, and a tensioning mechanism is also arranged in the groove 4; the grinding machine drives the driving wheel 5 through the first motor 6, and the driving wheel 5 drives the driven wheel 7 so that the sand belt on the driven wheel 7 grinds the workpiece, and the height of the driven wheel 7 can be adjusted by the lifting mechanism to gradually approach the workpiece to play a role of fine grinding, and in addition, the tension of the sand belt can be adjusted by the tensioning mechanism to achieve a suitable grinding state.

[0021] Furthermore, a hydraulic cylinder 8 is provided on the base 1 at the rear end of the box 3, and the upper end of the hydraulic cylinder 8 is against the box 3. The box 3 can be raised and lowered by the hydraulic cylinder 8, and the support frame can be extended into the base to play a large-scale height adjustment role and can be quickly positioned.

[0022] The movable groove 17 is provided in the movable groove 17 of the fixed rod 12, and the movable groove 17 is provided in the movable groove 17 of the fixed rod 12. The movable groove 17 is provided in the movable groove 17, and the movable groove 17 is provided in the movable groove 17 ...

[0023] Furthermore, the tensioning device includes a tensioning wheel 18 arranged between the driving wheel 5 and the driven wheel 7, the tensioning wheel 18 is sleeved on the movable rod 24, both ends of the movable rod 24 pass through the wall of the box body 3 and are mounted in the movable hole 19 on the wall of the box body 3, and the box body 3 wall is provided with positioning seats 20 at the upper and lower ends of the movable hole 19, and the positioning seats 20 are threadedly connected with fastening rods 21, and the fastening rods 21 at the upper and lower ends of the movable hole 19 are symmetrical along the center of the movable hole 19; when the movable rod 24 is moved downward, the tensioning wheel 18 presses down the sanding belt, and the sanding belt becomes tight; otherwise, the sanding belt becomes loose, and it is mainly through the fastening rods 21 at the upper and lower ends of the movable hole 19 that the movable rod 24 extending out of the movable hole 19 is fixed at the same time.

[0024] Furthermore, a second motor 22 is provided in the base 1, and the output end of the second motor 22 is connected to the output shaft, and the output shaft is connected to the movable disk 23. The movable disk 23 is provided on the upper surface of the base 1. The second motor 22 drives the movable disk 23 to rotate, which can improve the grinding efficiency of the workpiece placed on the movable disk 23.

[0025] During the specific operation, the workpiece to be ground is placed on the movable disk 23, the box body 3 is lowered by the hydraulic cylinder 8, and the driven wheel 7 is initially close to the workpiece in a large range. The second motor 22 is started to rotate the movable disk 23, and the first motor 6 is started to drive the driving wheel 5 to rotate, thereby the driven wheel 7 rotates, and the sanding belt runs. Then, the threaded rod 15 is driven to move downward in a spiral by rotating the turntable 14, and the driven wheel 7 mounted on the fixed shaft 13 is caused to gradually descend to approach the workpiece. In addition, the tensioning wheel 18 is used to adjust the tightness of the sanding belt. When the movable rod 24 is moved downward, the tensioning wheel 18 presses down the sanding belt, and the sanding belt becomes tight; otherwise, the sanding belt becomes loose, which is mainly achieved by fixing the movable rod 24 extending out of the movable hole 19 at the same time through the fastening rods 21 at the upper and lower ends of the movable hole 19. The grinder has the function of secondary height adjustment. The first adjustment is to make the driven wheel 7 close to the workpiece in a large range, while the secondary adjustment makes the driven wheel 7 gradually and finely approach for grinding, which plays the role of fine grinding and avoids the result of over-grinding caused by traditional single height adjustment.

[0026] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A belt grinder, characterized in that: It includes a base, one end of which is provided with a retractable bracket, a box is fixedly provided at the front end of the bracket, a groove penetrating the bottom of the box is provided in the box, the groove is provided along the length direction of the box and penetrates the front end of the box, a driving wheel is provided at the rear end of the groove, the driving wheel is provided on a rotating shaft, one end of the rotating shaft penetrates the box wall and is connected to the output end of the first motor; the driving wheel is connected to the driven wheel through a sanding belt to form a closed sanding belt, the driven wheel is provided on a mounting frame, the mounting frame is provided at the front end of the groove, a lifting mechanism capable of adjusting the height of the mounting frame is movably provided on the upper end of the mounting frame, and a tensioning mechanism is also provided in the groove.

2. The belt grinder according to claim 1, characterized in that: A hydraulic cylinder is arranged on the base at the rear end of the box body, and the upper end of the hydraulic cylinder abuts against the box body.

3. The belt grinder according to claim 1, characterized in that: Side grooves are arranged on both sides of the front end of the groove, and sliding rods are arranged in the side grooves. The mounting frame includes a linear bearing sleeved on the sliding rod, and a fixed rod and a fixed shaft are arranged between the linear bearings. The fixed shaft is located below the fixed rod, and the driven wheel frame is arranged on the fixed shaft.

4. The belt grinder according to claim 1, characterized in that: The lifting mechanism includes a turntable arranged at the upper end of the box body and a threaded rod fixed at the lower end of the turntable, the threaded rod is threadedly connected to the box body and passes through the box body, the lower end of the threaded rod is fixedly connected to a rotating block, and the rotating block is embedded in a movable groove connected to the fixed rod.

5. The belt grinder according to claim 1, characterized in that: The tensioning mechanism includes a tensioning wheel arranged between the driving wheel and the driven wheel, the tensioning wheel is sleeved on the movable rod, both ends of the movable rod pass through the box wall and are mounted in the movable hole on the box wall, the box wall is provided with positioning seats at the upper and lower ends of the movable hole, the positioning seat is threadedly connected with a fastening rod, and the fastening rods at the upper and lower ends of the movable hole are symmetrical up and down along the center of the movable hole.

6. The belt grinder according to claim 1, characterized in that: A second motor is arranged in the base, an output end of the second motor is connected to an output shaft, the output shaft is connected to a movable disk, and the movable disk is arranged on the upper surface of the base.

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