Abrasive belt adjusting structure and tool sharpener thereof

Abstract

The utility model relates to the technical field of tool sharpeners, and discloses an abrasive belt adjusting structure and a tool sharpener comprising the same, the abrasive belt adjusting structure comprises a bottom plate, the bottom plate is provided with a chute, and the bottom plate is fixedly connected with a motor; the abrasive belt is arranged on the bottom plate; the adjusting assembly is arranged on the bottom plate, the adjusting assembly is used for adjusting the abrasive belt, the adjusting assembly comprises a first abrasive belt wheel, a mounting frame, second abrasive belt wheels and a third abrasive belt wheel, the mounting frame is in sliding connection with a sliding groove in the bottom plate, and the second abrasive belt wheels are symmetrically arranged at one end of the mounting frame and rotationally connected with the mounting frame; the third abrasive belt wheel is arranged on the mounting frame and movably connected with the mounting frame, the tightness degree of the abrasive belt is adjusted through cooperation of components in the adjusting assembly, the inclined face of the abrasive belt is adjusted, and meanwhile the abrasive belt is supported by means of components in the supporting assembly. And the abrasive belt is prevented from falling off in the working process due to insufficient supporting force borne by the abrasive belt.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of the knife grinder, concretely relates to a sand belt adjusting structure and a knife grinder thereof. BACKGROUND

[0002] The knife grinder is a mechanical equipment specially used for grinding knives, which can help users quickly and accurately grind various knives, such as kitchen knives, gardening tools, woodworking tools, etc.; the main function of the knife grinder is to restore or improve the sharpness of the knives and prolong the service life of the knives; the annular sand belt is a widely used polishing tool in industrial production; it is formed by adhering abrasive to a base material to form a closed loop belt structure, and is usually used for surface polishing, polishing and deburring processes of materials such as metal, wood and stone.

[0003] The file with the publication number (CN118720953A) discloses a sand belt adjustable knife grinder and a control system thereof, which comprises: a knife grinding mechanism, including a knife grinding frame assembly, an adjusting wheel assembly and an adjusting frame assembly installed on the knife grinding frame assembly, and a driving assembly installed on the adjusting frame assembly; a water circulation mechanism, including a water circulation box assembly, a water adding assembly arranged on the water circulation box assembly, and the knife grinding frame assembly can be stably placed on the water circulation box assembly.

[0004] The above device can make the threaded rod rotate by rotating the knob, the threaded rod can make the pin column move and drive the adjusting frame body to rotate around the shaft rod two, the adjusting frame body rotating can drive the motor mounting frame to move, so that the motor rotates, the motor rotating can make the sand belt wheel two inclined and drive the sand belt to move, which is convenient for the staff to adjust the position of the sand belt.

[0005] The above device adjusts the position of the sand belt by adjusting the position of the motor and the sand belt wheel, but in the adjustment of the sand belt, due to the change of the position of the motor and the sand belt wheel, the supporting force of the sand belt is reduced, and when the supporting force of the sand belt is too low, the sand belt will fall off the device.

[0006] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0007] To solve the technical problem of supporting force in sand belt adjustment, the basic idea of the technical solution of the utility model is:

[0008] A belt sander adjustment structure and its grinding machine include a base plate with a groove, a motor fixedly connected to the base plate, a sanding belt disposed on the base plate, and an adjustment assembly disposed on the base plate. The adjustment assembly is used to adjust the sanding belt and includes a first sanding belt wheel, a mounting frame, a second sanding belt wheel, and a third sanding belt wheel. The mounting frame is slidably connected to the groove on the base plate. The second sanding belt wheels are symmetrically disposed at one end of the mounting frame and rotatably connected to the mounting frame. The third sanding belt wheel is disposed on the mounting frame and movably connected to the mounting frame. The first sanding belt wheel is fixedly connected to the output shaft of the motor. The sanding belt is drivenly connected to the first sanding belt wheel, and the sanding belt abuts against each of the second and third sanding belt wheels.

[0009] In a preferred embodiment of this utility model, the mounting frame is Y-shaped, and each second sanding belt wheel is located at one end of the mounting frame, with a distance between the second sanding belt wheels.

[0010] In a preferred embodiment of this utility model, a plurality of support blocks are provided on the base plate, and the support blocks are fixedly connected to the base plate. A lead screw is rotatably connected to the mounting frame, and the lead screw is threadedly connected to each support block. A baffle is fixedly connected to the base plate, and the other end of the mounting frame abuts against the baffle.

[0011] In a preferred embodiment of this utility model, a support rod is provided on the mounting frame, the support rod is rotatably connected to the mounting frame, a third sanding belt wheel is rotatably connected to the end of the support rod, and a support assembly is provided between the support rod and the mounting frame.

[0012] In a preferred embodiment of this utility model, the support assembly includes a telescopic rod and a spring. One end of the telescopic rod is rotatably connected to the support rod, and the other end of the telescopic rod is slidably connected to the mounting frame. The spring is sleeved on the telescopic rod, and both ends of the spring are fixedly connected to the corresponding ends of the telescopic rod.

[0013] In a preferred embodiment of the present invention, one end of the telescopic rod is rotatably connected to a first connecting block, the first connecting block being fixedly connected to a support rod, and the other end of the telescopic rod is rotatably connected to a second connecting block, the second connecting block being slidably connected to a mounting bracket.

[0014] A knife sharpening machine includes a base with an installation position. The installation position is provided with all the aforementioned sanding belt adjustment structures, and a base plate is fixedly connected to the installation position on the base.

[0015] In a preferred embodiment of the present invention, a mounting block is fixedly connected to the base, and a clamp is fixedly connected to the side wall of the mounting block. The clamp consists of two side plates, which are connected by fasteners.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The sanding belt adjustment structure and the grinding machine thereof adjust the tightness of the sanding belt and adjust the inclination of the sanding belt by coordinating the internal components of the adjustment assembly. At the same time, the sanding belt is supported by the components in the support assembly to prevent the sanding belt from falling off during operation due to insufficient support.

[0018] 2. This abrasive belt adjustment structure and its grinding machine, when the abrasive belt comes into contact with and rubs against the cutting tool and is squeezed inward by the tool, supports the abrasive belt through components within the support assembly, preventing excessive hard force on the abrasive belt, which could affect its lifespan and the quality of the cutting tool.

[0019] 3. The sanding belt adjustment structure and its grinding machine have an R angle of approximately 90 degrees at the Y-shaped end of the mounting frame. By extending and tightening the sanding belt, the overall sanding belt is relaxed, preventing it from hardening and breaking during processing after prolonged use, thus avoiding a threat to the user's safety.

[0020] 4. The abrasive belt adjustment structure and its grinding machine, wherein the abrasive belt on the side in contact with the tool changes its inclination surface due to the change of the mounting frame position, and when the inclination surface of the abrasive belt changes, the grinding angle of the abrasive belt on the tool changes, thereby making fine adjustments to the grinding of the tool.

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0022] In the attached diagram:

[0023] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the adjustment component structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the mounting frame structure of this utility model;

[0026] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure at point B;

[0027] Figure 5 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0028] In the diagram: 1. Base; 11. Sanding belt; 12. Mounting block; 13. Clamp; 2. Base plate; 21. Baffle; 22. Motor; 23. First sanding belt wheel; 3. Mounting frame; 31. Second sanding belt wheel; 32. Lead screw; 33. Support block; 4. Support rod; 41. Telescopic rod; 42. Spring; 43. First connecting block; 44. Second connecting block; 45. Third sanding belt wheel. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0030] Please see Figures 1-5 A belt sander adjustment structure and its grinding machine include a base plate 2 with a groove on the base plate 2 and a motor 22 fixedly connected to the base plate 2; a sanding belt 11 disposed on the base plate 2; and an adjustment assembly disposed on the base plate 2 for adjusting the sanding belt 11. The adjustment assembly includes a first sanding belt wheel 23, a mounting frame 3, a second sanding belt wheel 31, and a third sanding belt wheel 45. The mounting frame 3 is slidably connected to the groove on the base plate 2. The second sanding belt wheel 31 is symmetrically disposed at one end of the mounting frame 3 and rotatably connected to the mounting frame 3. The third sanding belt wheel 45... Wheel 45 is mounted on mounting frame 3. Third sanding belt wheel 45 is movably connected to mounting frame 3. First sanding belt wheel 23 is fixedly connected to the output shaft of motor 22. Sanding belt 11 is drivenly connected to first sanding belt wheel 23. Sanding belt 11 abuts against each second sanding belt wheel 31 and third sanding belt wheel 45. The tension of sanding belt 11 is adjusted and the inclination of sanding belt 11 is adjusted by adjusting the cooperation of internal components of the adjustment assembly. At the same time, 45 supports sanding belt 11 with the help of components in the support assembly to prevent sanding belt 11 from falling off during operation due to insufficient support force.

[0031] The mounting frame 3 is Y-shaped. Each second sanding belt wheel 31 is located at one end of the mounting frame 3, with a distance between them. Multiple support blocks 33 are mounted on the base plate 2, and each support block 33 is fixedly connected to the base plate 2. A lead screw 32 is rotatably connected to the mounting frame 3, and the lead screw 32 is threadedly connected to each support block 33. A baffle 21 is fixedly connected to the base plate 2, and the other end of the mounting frame 3 abuts against the baffle 21. Manually rotating the lead screw 32 causes threaded transmission between the lead screw 32 and the support block 33, driving the mounting frame 3 to slide within a groove in the base plate 2. This change in the position of the mounting frame 3, along with the movement of the second sanding belt wheels 31, causes the second sanding belt wheels to... The abrasive belts 31 are symmetrically arranged at one end of the mounting frame 3 with a gap. Therefore, when each second abrasive belt wheel 31 moves, the abrasive belt 11 on the side in contact with the tool changes its tilt surface due to the change in the position of the mounting frame 3. When the tilt surface of the abrasive belt 11 changes, the grinding angle of the abrasive belt 11 on the tool changes, thereby making a fine adjustment to the grinding of the tool. The mounting frame 3 moves through the thread of the lead screw 32. The thread has precision during movement. At the same time, the R angle of the Y-shaped end of the mounting frame 3 is approximately 90 degrees. By extending and tightening the abrasive belt 11, the overall abrasive belt 11 is relaxed, preventing the abrasive belt 11 from hardening and breaking during processing after long-term use, which would threaten the safety of the user.

[0032] The mounting frame 3 is equipped with a support rod 4, which is rotatably connected to the mounting frame 3. A third sanding belt wheel 45 is rotatably connected to the end of the support rod 4. A support assembly is provided between the support rod 4 and the mounting frame 3. The support assembly includes a telescopic rod 41 and a spring 42. One end of the telescopic rod 41 is rotatably connected to the support rod 4, and the other end of the telescopic rod 41 is fixedly connected to the mounting frame 3. The spring 42 is sleeved on the telescopic rod 41, and both ends of the spring 42 are fixedly connected to the corresponding ends of the telescopic rod 41. One end of the telescopic rod 41 is rotatably connected to a first connecting block 43, which is fixedly connected to the support rod 4. The other end of the telescopic rod 41 is rotatably connected to a second connecting block 44, which is fixedly connected to the mounting frame 3. During the adjustment of the sanding belt 11... When the abrasive belt 11 retracts inward, it pushes 45 and support rod 4. Support rod 4 rotates towards telescopic rod 41. After being squeezed, telescopic rod 41 retracts inward and squeezes spring 42. Spring 42 deforms after being squeezed and applies the deformation force to telescopic rod 41. Telescopic rod 41 is supported by the force of spring 42 and stops retracting. After telescopic rod 41 stops retracting, it supports support rod 4 and 45. 45 supports abrasive belt 11 to prevent abrasive belt 11 from falling off the device during operation due to insufficient support force after adjustment. When abrasive belt 11 comes into contact with and rubs against the cutting tool, it is squeezed inward by the cutting tool. The components in the support assembly support abrasive belt 11 to prevent excessive hard force on abrasive belt 11, which could affect its lifespan and the quality of the cutting tool.

[0033] A knife sharpening machine includes a base 1 with an installation position. The installation position is equipped with all the aforementioned abrasive belt adjustment structures. A base plate 2 is fixedly connected to the installation position on the base 1. An installation block 12 is fixedly connected to the base 1. A clamp 13 is fixedly connected to the side wall of the installation block 12. The clamp 13 consists of two side plates connected by fasteners, including but not limited to bolts. A knife is placed between the clamps 13 and tightened using the fasteners. A motor 22 drives a first abrasive belt wheel 23 to rotate, which in turn drives an abrasive belt 11 to rotate. The rotating abrasive belt 11 rubs against the knife to sharpen it. The tension of the abrasive belt 11 is adjusted by coordinating the internal components of an adjustment assembly, and the inclination of the abrasive belt 11 is also adjusted. Simultaneously, the abrasive belt 11 is supported by components within a support assembly to prevent insufficient support from causing it to fall off during operation.

[0034] Working Principle: The cutting tool is placed between the clamps 13 and tightened with fasteners. The motor 22 drives the first abrasive belt wheel 23 to rotate, which in turn drives the abrasive belt 11 to rotate. As the abrasive belt 11 rotates, it rubs against the cutting tool to grind it. When adjustment is needed, the lead screw 32 is manually rotated. The lead screw 32 is threadedly driven by the support block 33, causing the mounting bracket 3 to slide within the groove of the base plate 2. This change in the position of the mounting bracket 3 simultaneously drives the second abrasive belt wheel 31. The second abrasive belt wheels 31 are symmetrically arranged at one end of the mounting bracket 3 with a gap. Therefore, as each second abrasive belt wheel 31 moves, the abrasive belt 11 on the side in contact with the cutting tool changes its inclination due to the change in the position of the mounting bracket 3. When the inclination of the abrasive belt 11 changes, the grinding angle of the abrasive belt 11 on the cutting tool changes, thus allowing for fine adjustments to the grinding of the cutting tool. The mounting bracket 3 moves via the thread of the lead screw 32. The thread provides precision during movement, allowing for adjustments to the abrasive belt 11. When the sanding belt 11 retracts inward, it pushes 45 and the support rod 4. The support rod 4 rotates towards the telescopic rod 41. The telescopic rod 41, under pressure, retracts inward and compresses the spring 42. The spring 42 deforms under pressure and applies the deformation force to the telescopic rod 41. The telescopic rod 41 stops retracting due to the force of the spring 42. After the telescopic rod 41 stops retracting, it supports the support rods 4 and 45. 45 supports the sanding belt 11, preventing insufficient support after adjustment from causing problems during operation. During operation, the sanding belt 11 detaches from the device. When it comes into contact with and rubs against the cutting tool, it is squeezed inward by the tool. The components inside the support assembly support the sanding belt 11 to prevent it from being subjected to excessive hard force, which could affect its lifespan and the quality of the cutting tool. At the same time, the R angle of the Y-shaped end of the mounting bracket 3 is approximately 90 degrees. By extending and tightening the sanding belt 11, the overall tension of the sanding belt 11 is eased, preventing it from hardening and breaking during processing after prolonged use, which could threaten the user's safety.

[0035] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A sanding belt adjustment structure, characterized in that, include: The base plate (2) has a sliding groove and a motor (22) is fixedly connected to the base plate (2); A sanding belt (11) is set on the base plate (2); An adjustment assembly is set on the base plate (2) and is used to adjust the sanding belt (11). The adjustment assembly includes a first sanding belt wheel (23), a mounting frame (3), a second sanding belt wheel (31), and a third sanding belt wheel (45). The mounting frame (3) is slidably connected to the groove on the base plate (2). The second sanding belt wheel (31) is symmetrically arranged at one end of the mounting frame (3) and rotatably connected to the mounting frame (3). The third sanding belt wheel (45) is set on the mounting frame (3) and movably connected to the mounting frame (3). The first sanding belt wheel (23) is fixedly connected to the output shaft of the motor (22). The sanding belt (11) is drivenly connected to the first sanding belt wheel (23). The sanding belt (11) abuts against each of the second sanding belt wheel (31) and the third sanding belt wheel (45).

2. The sand belt adjustment structure according to claim 1, characterized in that, The mounting frame (3) is Y-shaped in general. Each second sanding belt wheel (31) is located at one end of the mounting frame (3), and there is a distance between the second sanding belt wheels (31).

3. The sand belt adjustment structure according to claim 1, characterized in that, The base plate (2) is provided with multiple support blocks (33), all of which are fixedly connected to the base plate (2). A screw rod (32) is rotatably connected to the mounting frame (3), and the screw rod (32) is threadedly connected to each support block (33). A baffle (21) is fixedly connected to the base plate (2), and the other end of the mounting frame (3) abuts against the baffle (21).

4. The sanding belt adjustment structure according to claim 1, characterized in that, The mounting frame (3) is provided with a support rod (4), the support rod (4) is rotatably connected to the mounting frame (3), the third sanding wheel (45) is rotatably connected to the end of the support rod (4), and a support assembly is provided between the support rod (4) and the mounting frame (3).

5. The sand belt adjustment structure according to claim 4, characterized in that, The support assembly includes a telescopic rod (41) and a spring (42). One end of the telescopic rod (41) is rotatably connected to the support rod (4), and the other end of the telescopic rod (41) is slidably connected to the mounting frame (3). The spring (42) is sleeved on the telescopic rod (41), and both ends of the spring (42) are fixedly connected to the corresponding ends of the telescopic rod (41).

6. The sand belt adjustment structure according to claim 5, characterized in that, One end of the telescopic rod (41) is rotatably connected to a first connecting block (43), which is fixedly connected to the support rod (4). The other end of the telescopic rod (41) is rotatably connected to a second connecting block (44), which is slidably connected to the mounting bracket (3).

7. A knife sharpening machine, comprising a base (1), characterized in that, The base (1) has an installation position, and the installation position is provided with a sand belt adjustment structure as described in any one of claims 1-6. The base plate (2) is fixedly connected to the installation position on the base (1).

8. The sharpening machine according to claim 7, characterized in that, A mounting block (12) is fixedly connected to the base (1), and a clamp (13) is fixedly connected to the side wall of the mounting block (12). The clamp (13) consists of two side plates, which are connected by fasteners.

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