A locking device for a sander

Abstract

The utility model discloses a locking device for sander relates to sander technical field, and it is designed to solve the technical problem that the locking device for sander of existing cannot lock the angle of tension pulley quickly before and after rectification, including frame, adjustment subassembly is set up at the top of frame, when the utility model needs to install or disassemble abrasive belt quickly, handheld the handle extension end of "L" shape and presses down, through cooperation with elastic component, can make tension pulley with hinged place as center, along the fan -shaped track parallel with driving wheel and driven wheel displacement, when needing rectification, the locking pin sleeve is pulled out to its far away locking pin, and the locking is cancelled, can be driven through stepping motor, and make tension pulley rotate along the direction perpendicular to driving wheel and driven wheel, and slightly angle makes the skewed abrasive belt return to the correct position, then releases the locking pin, and tension pulley 4 can be locked in the current position through locking subassembly quickly.

Description

Technical Field

[0001] This utility model relates to the field of sanding machine technology, and more specifically, to a locking device for sanding machines. Background Technology

[0002] A sander is an electric tool or fixed device that uses abrasives such as sandpaper or sanding belts to grind and polish the surface of workpieces such as wood, metal, and plastic. The sander achieves the process purpose of removing material, smoothing the surface, reducing roughness, or obtaining a specific gloss by having high-speed moving abrasives come into contact with the surface of the workpiece.

[0003] Based on their structure, abrasive form, and movement, sanders can be mainly divided into several types, such as disc sanders, track sanders, and belt sanders. Among them, belt sanders mainly consist of a drive wheel, a driven tension wheel, and an annular sanding belt fitted on both wheels. The motor drives the drive wheel to rotate, and the friction drives the sanding belt to make a high-speed unidirectional cyclic motion, thereby continuously and efficiently processing the workpiece passing through its grinding area. During the use of belt sanders, the sanding belt is prone to lateral deviation at high speed. Belt deviation can easily lead to uneven grinding, accelerated wear on the edge of the sanding belt, and even cause the sanding belt to completely detach from the wheel body.

[0004] To address the aforementioned issues, existing technologies employ mechanical tracking and correction components. These components work by using a driven tensioning wheel that can deflect slightly. When the operator detects belt deviation, they manually adjust a tracking knob, which causes a minute angular deflection of the tensioning wheel, altering the belt's trajectory and returning it to the correct position. However, these mechanical tracking and correction components lack a rapid and reliable locking mechanism after correction. Under subsequent continuous high-intensity vibrations, the adjusted tensioning wheel may experience slight displacement or rebound, resulting in the loss of correction effectiveness and requiring frequent re-observation and adjustment by the operator. Therefore, we propose a locking device for sanders. Utility Model Content

[0005] The purpose of this invention is to provide a locking device for a sander to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: including a frame;

[0007] An adjustment component is provided on the top of the frame. The adjustment component includes a handle. The handle is "L"-shaped and hinged to the top of the frame at one of its bottom corners. An elastic component is provided at the other bottom end of the handle. The bottom of the elastic component is installed on the top of the frame. A locking component is also provided on the outer wall of the handle.

[0008] The tensioning wheel includes a wheel body and a wheel frame. One end of the tensioning wheel frame is hinged to the top of the handle and can rotate in the vertical direction. The tensioning wheel can be driven by a stepper motor.

[0009] A locking assembly is provided on the outer wall of the handle, including a spring C fixed between the handle and the outer wall of the tension wheel frame. A locking pin is provided at the end of the tension wheel frame. A locking pin sleeve is inserted into the outer wall of the handle at the location corresponding to the locking pin. The locking pin sleeve can be magnetically inserted into the locking pin.

[0010] As a further description of the above technical solution: the outer side wall of the frame is rotatably connected with a driving wheel and a driven wheel. The driving wheel and the driven wheel are both parallel to the tensioning wheel and can cooperate with each other. The driving wheel can be driven by a driving motor.

[0011] The outer walls of the drive wheel, tension wheel, and driven wheel are provided with sanding belts, and the outer wall of the frame is also equipped with a worktable.

[0012] As a further description of the above technical solution: the handle is "L" shaped and a hinge assembly A is installed at one of the bottom corners. The hinge assembly A is installed on the top of the frame. The handle can cooperate with the hinge assembly A to make the tension wheel move in a direction parallel to the driving wheel and the driven wheel.

[0013] As a further description of the above technical solution: the elastic component includes a spring A and a damper, and the outer wall of the damper is fitted with the spring A.

[0014] As a further description of the above technical solution: a correction component is installed on the top of the handle. The correction component includes a hinged inner frame B fixed to the top of the handle. A hinged outer frame B is hinged to the outer side of the hinged inner frame B. A tensioning wheel is installed on the outer side wall of the hinged outer frame B. The hinged outer frame B can be driven by a stepper motor to make the tensioning wheel rotate in a direction perpendicular to the driving wheel and the driven wheel.

[0015] As a further description of the above technical solution: a screw head and a limiting ring are fixed on the outer wall of the locking pin sleeve; a spring B is sleeved on the outer wall of the locking pin sleeve; the spring B is located between the limiting ring and the handle; a magnetic piece A is fixed on the outer wall of the locking pin; a magnetic piece B is installed on the inner wall of the locking pin sleeve; the magnetic poles of the magnetic piece B are opposite to those of the magnetic piece A.

[0016] In the above technical solution, the locking device for a sander provided by this utility model has the following beneficial effects:

[0017] When the sanding belt needs to be quickly installed or removed, the L-shaped handle is held and pressed down. In conjunction with the elastic component, the tensioning wheel can be moved around the hinge point along a fan-shaped trajectory parallel to the driving and driven wheels. When correction is needed, the locking pin sleeve is pulled outward to move it away from the locking pin, thus releasing the lock. The tensioning wheel can then be driven by the stepper motor to rotate in a direction perpendicular to the driving and driven wheels. A slight angle is used to return the skewed sanding belt to the correct position. Then, the locking pin is released, and the tensioning wheel 4 can be quickly locked in the current position by the locking component. This solves the problem that existing locking devices for sanders cannot quickly lock the tensioning wheel at an angle before and after correction. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the back structure provided for an embodiment of this utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure at point A;

[0021] Figure 3 This is a front view structural diagram provided for an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the locking assembly provided in an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Frame; 2. Drive motor; 3. Drive wheel; 4. Tensioner wheel; 5. Adjustment assembly; 6. Sanding belt; 7. Driven wheel; 8. Worktable;

[0025] 501. Hinge assembly A; 502. Handle; 503. Elastic assembly; 504. Correction assembly; 505. Locking assembly;

[0026] 5031, Spring A; 5032, Damper;

[0027] 5041, Hinged inner frame B; 5042, Hinged outer frame B; 5043, Stepper motor;

[0028] 5051, Locking pin sleeve; 5052, Tightening head; 5053, Spring B; 5054, Limiting ring; 5055, Magnetic plate A; 5056, Magnetic plate B; 5057, Locking pin; 5058, Spring C. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0030] Please see Figures 1-4 This utility model embodiment provides a technical solution: including a frame 1;

[0031] In another embodiment of the present invention, preferably, the outer wall of the frame 1 is rotatably connected with a drive wheel 3 and a driven wheel 7. The drive wheel 3 and the driven wheel 7 are both parallel to the tension wheel 4 and can cooperate with each other. The drive wheel 3 can be driven by the drive motor 2.

[0032] The outer walls of the drive wheel 3, tension wheel 4 and driven wheel 7 are equipped with sanding belts 6, and the outer walls of the frame 1 are also equipped with worktables 8.

[0033] Adjustment component 5 is set on the top of frame 1. Adjustment component 5 includes handle 502. Handle 502 is "L" shaped and is hinged to the top of frame 1 at one corner. Elastic component 503 is provided at the other bottom end of handle 502. The bottom of elastic component 503 is installed on the top of frame 1. Locking component 505 is also provided on the outer wall of handle 502.

[0034] In another embodiment of the present invention, preferably, the handle 502 is L-shaped and a hinge assembly A501 is installed at one corner of the bottom end. The hinge assembly A501 is installed on the top of the frame 1. The handle 502 can cooperate with the hinge assembly A501 to make the tension wheel 4 move in a direction parallel to the driving wheel 3 and the driven wheel 7.

[0035] By operating the handle 502, the tensioning wheel 4 can be displaced along a fan-shaped trajectory parallel to the driving wheel 3 and the driven wheel 7 with the hinge as the center, thereby achieving the tensioning or slack of the sanding belt 6.

[0036] The tension wheel 4 includes a wheel body and a wheel frame. One end of the wheel frame of the tension wheel 4 is hinged to the top of the handle 502 and can rotate in the vertical direction. The tension wheel 4 can be driven by a stepper motor 5043. The wheel body of the tension wheel 4 can rotate freely within the wheel frame.

[0037] The locking assembly 505 is located on the outer wall of the handle 502 and includes a spring C5058 fixed between the handle 502 and the outer wall of the tension wheel 4 frame. This spring C5058 provides cushioning and restoring force. After the sanding belt 6 is adjusted, the spring C5058's rebound force can drive the tension wheel 4 to return to its original position. A locking pin 5057 is provided at the end of the tension wheel 4 frame. A locking pin sleeve 5051 is inserted into the outer wall of the handle 502 at the location corresponding to the locking pin 5057. The locking pin sleeve 5051 can be magnetically engaged with the locking pin 5057. When the locking pin sleeve 5051 and the locking pin 5057 are magnetically engaged together, the tension wheel 4 is locked and cannot rotate along the hinge of the correction assembly 504.

[0038] In another embodiment of this utility model, the elastic component 503 includes a spring A5031 and a damper 5032. The outer wall of the damper 5032 is fitted with the spring A5031, which provides buffering and resetting force. When the sanding belt 6 is installed or removed, the spring A5031 resets, which can drive the handle 502 and the tension wheel 4 to reset. At the same time, during the operation, the damper 5032 can also play a role in buffering and shock absorption, reducing the shaking of the tension wheel 4 and maintaining the stability of the sanding belt 6.

[0039] In another embodiment of this utility model, a correction component 504 is installed on the top of the handle 502. The correction component 504 includes a hinged inner frame B5041 fixed to the top of the handle 502, and a hinged outer frame B5042 is hinged to the outer side of the hinged inner frame B5041. A tension wheel 4 is installed on the outer side wall of the hinged outer frame B5042. The hinged outer frame B5042 can be driven by a stepper motor 5043, so that the tension wheel 4 rotates in a direction perpendicular to the driving wheel 3 and the driven wheel 7. When the sander is started, the sanding belt 6 will naturally move to the side with greater friction. If the sanding belt 6 deviates to the left, the tension wheel 4 is slightly adjusted in the opposite direction, and the sanding belt 6 will gradually return to the center position and return to the correct running trajectory. The same applies when the sanding belt 6 deviates to the right.

[0040] In another embodiment of this utility model, a screw head 5052 and a limiting ring 5054 are fixed on the outer wall of the locking pin sleeve 5051. A spring B5053 is sleeved on the outer wall of the locking pin sleeve 5051. The spring B5053 is located between the limiting ring 5054 and the handle 502. A magnetic piece A5055 is fixed on the outer wall of the locking pin 5057. A magnetic piece B5056 is installed on the inner wall of the locking pin sleeve 5051. The magnetic poles of the magnetic piece B5056 are opposite to those of the magnetic piece A5055. Reliable engagement is achieved through magnetic attraction.

[0041] Working principle: This embodiment provides a locking device for a sander. When using this utility model, if it is necessary to quickly install or remove the sanding belt 6, hold the extended end of the "L"-shaped handle 502 and press it down. Through cooperation with the elastic component 503, the handle 502 overcomes the elastic force of the elastic component 503 and drives the tension wheel 4 to move along a fan-shaped trajectory parallel to the driving wheel 3 and the driven wheel 7 with the hinge component A501 as the center. This loosens the sanding belt 6, making it easy to replace. After replacement, release the handle 502, and the spring A5031 will return to its original position, which can drive the handle 502 and the tension wheel 4 to return to their original positions. At the same time, during the operation, the damper 5032 can also play a role in buffering and shock absorption, reducing the shaking of the tension wheel 4 and maintaining the stability of the sanding belt 6.

[0042] When correction is needed, pull out the locking pin sleeve 5051 to move it away from the locking pin 5057, release the lock, turn on the external power supply, turn on the stepper motor 5043 through the external switch, and make the stepper motor 5043 drive the tension wheel 4 to make a slight adjustment in the direction of the sanding belt 6. When the sander starts, the sanding belt 6 will naturally move to the side with greater friction. If the sanding belt 6 deviates to the left, make a slight adjustment in the opposite direction to the tension wheel 4, and the sanding belt 6 will gradually return to the center position and return to the correct running trajectory. The same applies when the sanding belt 6 deviates to the right. Make the tension wheel 4 rotate in a direction perpendicular to the driving wheel 3 and the driven wheel 7, and make a slight angle to bring the deviated sanding belt 6 back to the correct position.

[0043] At this time, spring C5058 is stretched or compressed. After adjustment, stepper motor 5043 is turned off, and spring C5058 resets, which can drive tension wheel 4 to reset.

[0044] Next, release the locking pin 5057. The locking pin sleeve 5051 can magnetically engage with the locking pin 5057. When the locking pin sleeve 5051 and the locking pin 5057 are magnetically engaged, the tension wheel 4 is locked and cannot rotate along the hinge of the correction assembly 504. The tension wheel 4 can be quickly locked in the current position by the locking assembly 505 (both the active motor 2 and the stepper motor 5043 are existing products on the market and are connected to an external power supply and an external switch).

[0045] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A locking device for a sander, characterized in that, Includes rack (1); An adjustment component (5) is provided on the top of the frame (1). The adjustment component (5) includes a handle (502). The handle (502) is "L" shaped and is hinged to the top of the frame (1) at one corner. An elastic component (503) is provided at the other end of the bottom of the handle (502). The bottom of the elastic component (503) is installed on the top of the frame (1). A locking component (505) is also provided on the outer wall of the handle (502). The tension wheel (4) includes a wheel body and a wheel frame. One end of the wheel frame of the tension wheel (4) is hinged to the top of the handle (502) and can rotate in the vertical direction. The tension wheel (4) can be driven by a stepper motor (5043). A locking assembly (505) is provided on the outer wall of the handle (502), including a spring C (5058) fixed between the handle (502) and the outer wall of the tension wheel (4) frame. A locking pin (5057) is provided at the end of the tension wheel (4) frame. A locking pin sleeve (5051) is inserted into the outer wall of the handle (502) at the location corresponding to the locking pin (5057). The locking pin sleeve (5051) can be magnetically inserted into the locking pin (5057).

2. The locking device for a sander according to claim 1, characterized in that, The outer wall of the frame (1) is rotatably connected to a drive wheel (3) and a driven wheel (7). The drive wheel (3) and the driven wheel (7) are parallel to the tension wheel (4) and can cooperate with each other. The drive wheel (3) can be driven by the drive motor (2). The outer walls of the drive wheel (3), tension wheel (4) and driven wheel (7) are provided with sanding belts (6), and the outer walls of the frame (1) are also provided with worktables (8).

3. A locking device for a sander according to claim 2, characterized in that, The handle (502) is "L" shaped and has a hinge assembly A (501) installed at one corner of the bottom. The hinge assembly A (501) is installed on the top of the frame (1). The handle (502) can cooperate with the hinge assembly A (501) to make the tension wheel (4) move in a direction parallel to the driving wheel (3) and the driven wheel (7).

4. A locking device for a sander according to claim 3, characterized in that, The elastic component (503) includes a spring A (5031) and a damper (5032), with the spring A (5031) sleeved on the outer wall of the damper (5032).

5. A locking device for a sander according to claim 4, characterized in that, The top of the handle (502) is equipped with a correction assembly (504). The correction assembly (504) includes a hinged inner frame B (5041) fixed to the top of the handle (502). A hinged outer frame B (5042) is hinged to the outer side of the hinged inner frame B (5041). A tension wheel (4) is installed on the outer side wall of the hinged outer frame B (5042). The hinged outer frame B (5042) can be driven by a stepper motor (5043) to make the tension wheel (4) rotate in a direction perpendicular to the driving wheel (3) and the driven wheel (7).

6. A locking device for a sander according to claim 5, characterized in that, The outer wall of the locking pin sleeve (5051) is fixed with a screw head (5052) and a limiting ring (5054). The outer wall of the locking pin sleeve (5051) is fitted with a spring B (5053). The spring B (5053) is located between the limiting ring (5054) and the handle (502). The outer wall of the locking pin (5057) is fixed with a magnetic piece A (5055). The inner wall of the locking pin sleeve (5051) is fitted with a magnetic piece B (5056). The magnetic poles of the magnetic piece B (5056) are opposite to those of the magnetic piece A (5055).

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