A tool sharpener

Abstract

This utility model discloses a tool sharpening machine, including a base, a grinding disc mounted on the base, a motor for driving the grinding disc to rotate, and a protective shell mounted on the base corresponding to the outer side of the grinding disc. The protective shell includes a fixed shell mounted on the base and a movable shell that can move up and down relative to the fixed shell and has an opening. The height of the fixed shell is less than the height of the grinding disc. The tool sharpening machine also includes a pushing mechanism for pushing the movable shell up and down. In use, when the height of the grinding disc is reduced to less than the opening height of the movable shell, the user can operate the pushing mechanism to push the movable shell downwards to adjust the opening height of the movable shell to be less than the height of the grinding disc. This allows the grinding disc to continue to be used for sharpening operations, making full use of each grinding disc, thereby reducing grinding disc waste and lowering grinding costs.

Description

Technical Field

[0001] This utility model belongs to the field of grinding equipment technology, and specifically relates to a tool sharpening machine. Background Technology

[0002] A tool sharpening machine is a grinding device specifically designed for sharpening cutting tools. A typical tool sharpening machine includes a base, a grinding disc mounted on the base, a motor to drive the grinding disc, and a protective shell on the base corresponding to the outside of the grinding disc, with an opening in the shell. In use, the motor is first turned on to drive the grinding disc to rotate. Then, the unsharpened cutting edge of the tool is placed flat on the grinding disc, where the grinding disc grinds and sharpens the cutting edge, thus completing the tool sharpening process.

[0003] However, existing tool sharpening machines still have shortcomings. The grinding disc is continuously worn down during the grinding process, causing the disc height to decrease. When the disc height is reduced to less than the height of the protective shell opening, the tool will be blocked by the side wall of the protective shell opening during the sharpening operation. This prevents the tool edge from lying flat on the grinding disc, making it impossible to continue the sharpening operation. Users must replace the grinding disc before the sharpening operation can be performed again, resulting in the old grinding disc becoming unusable and wasting resources, thus increasing grinding costs. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a tool sharpening machine, wherein the opening height of the protective shell of the tool sharpening machine can be adjusted to reduce the waste of the grinding disc and reduce the grinding cost.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a knife sharpening machine, including a base, a grinding disc disposed on the base, a motor for driving the grinding disc to rotate, and a protective shell disposed on the base corresponding to the outer side of the grinding disc. The protective shell includes a fixed shell disposed on the base and a movable shell that can move up and down relative to the fixed shell and has an opening. The height of the fixed shell is less than the height of the grinding disc. The knife sharpening machine also includes a pushing mechanism for pushing the movable shell to move up and down.

[0006] In the above solution, the protective shell is divided into a fixed shell and a movable shell. When the height of the grinding disc is consumed to a level lower than the opening height of the movable shell, the user can operate the pushing mechanism to move the movable shell downwards to adjust the opening height of the movable shell to be lower than the height of the grinding disc. This allows the grinding disc to continue to be used for sharpening operations, making full use of each grinding disc, thereby reducing grinding disc waste and lowering grinding costs.

[0007] Furthermore, the aforementioned pushing mechanism includes a rotating rod rotatably connected to the outside of the fixed shell, and a first fixed seat disposed on the outside of the movable shell. Rotating the rotating rod will drive the first fixed seat to move up and down along the rotating rod, and the first fixed seat will drive the movable shell to move up and down at the same time, thereby realizing the structural function of the pushing mechanism to drive the movable shell to move up and down.

[0008] Furthermore, the aforementioned pushing mechanism also includes a second fixed seat located on the outside of the fixed housing, a sleeve on the second fixed seat, a slide cylinder placed inside the sleeve, and a rotating rod rotatably connected to the inside of the sleeve, with the outer side of the rotating rod threadedly connected to the inner side of the slide cylinder. Rotating the rotating rod will cause the slide cylinder to slide up and down along the sleeve via threaded transmission, and the upper end of the slide cylinder abuts against the lower part of the first fixed seat. In use, when the rotating rod is rotated via threaded transmission and the slide cylinder moves upward along the sleeve, the slide cylinder will push the first fixed seat upward, causing the movable housing to move upward; and when the rotating rod is rotated via threaded transmission and the slide cylinder moves downward along the sleeve, the first fixed seat and the movable housing will move downward together with the slide cylinder.

[0009] Furthermore, the aforementioned propulsion mechanism comprises three parts: a first propulsion mechanism, a second propulsion mechanism, and a third propulsion mechanism, each positioned at a corner of the protective shell. These three propulsion mechanisms drive the movable shell up and down, ensuring it moves in a straight line and providing smoother transmission. The first propulsion mechanism's rotating rod is connected to a first turntable; rotating the first turntable drives the rotating rod, facilitating operation. The rotating rod of the first propulsion mechanism is connected to the rotating rod of the second propulsion mechanism, and vice versa. Thus, rotation of the first propulsion mechanism's rod drives rotation of the second propulsion mechanism's rod, and vice versa, ensuring synchronized rotation of the rotating rods of each mechanism. This guarantees the movable shell moves in a straight line, preventing tilting during movement.

[0010] Furthermore, the rotating rod of the first pushing mechanism is connected to a first driving gear, the rotating rod of the second pushing mechanism is connected to a first driven gear and a second driving gear, and the rotating rod of the third pushing mechanism is connected to a second driven gear. The first driving gear and the first driven gear are connected via a first toothed belt drive, and the second driving gear and the second driven gear are connected via a second toothed belt drive. In use, when the rotating rod of the first pushing mechanism rotates, it drives the first driving gear to rotate. Simultaneously, the rotation of the first driving gear drives the first driven gear to rotate via the first toothed belt, which in turn drives the second driving gear to rotate via the second toothed belt, thus achieving the structural function of synchronous rotation of the rotating rods of each pushing mechanism.

[0011] Furthermore, the outer side of the aforementioned fixed shell is provided with base plates corresponding to the upper and lower positions of the two toothed belts. A tension wheel is rotatably connected between the two base plates corresponding to the inner position of the toothed belts. The tension wheel abuts against the inner side of the toothed belts, which can prevent the toothed belts from loosening and improve the transmission stability between the toothed belts and gears.

[0012] Furthermore, each of the two base plates is provided with a sliding groove. A screw passes through the sliding groove of the two base plates and is threadedly connected to a nut. A tensioning wheel is fitted on the outside of the screw, corresponding to the position between the two base plates. This allows adjustment of the position of the tensioning wheel, enabling better tightening of the toothed belt. In use, when the toothed belt becomes loose, the nut can be loosened. At this time, the screw can be pushed to slide along the sliding groove to adjust the position of the tensioning wheel so that it abuts against the inside of the toothed belt. Then, the nut is tightened, at which point the screw can no longer slide along the sliding groove, thus locking the position of the tensioning wheel. This allows the tensioning wheel to tighten the toothed belt, ensuring the transmission stability between the toothed belt and the gear.

[0013] Furthermore, the aforementioned tool sharpening machine also includes a dressing mechanism for repairing and smoothing the grinding surface of the grinding disc. The dressing mechanism includes a base platform located on the outside of the base, a first slide block located on the base platform and capable of sliding back and forth relative to the base platform, a second slide block capable of sliding up and down relative to the first slide block, a support rod connected to the second slide block, and a dressing pen located at the front end of the support rod. The dressing pen is located above the grinding disc, and the movable housing has an avoidance opening corresponding to the position of the dressing pen. In use, pushing the first slide can adjust the front-to-back position of the dressing pen, while pushing the second slide can adjust its up-to-down position. After long-term use, unevenness inevitably appears on the grinding wheel, which can affect the sharpening effect on the tool. At this time, the position of the dressing pen can be adjusted so that the lower end of the dressing pen is against the grinding wheel. As the grinding wheel rotates, the dressing pen will repair the grinding wheel. Adjusting the dressing pen to move back and forth relative to the grinding wheel can fully repair the grinding wheel. After the grinding wheel is smoothed by the dressing pen, the sharpening operation can be performed, resulting in a better sharpening effect on the tool.

[0014] Furthermore, a first lead screw is rotatably connected to the aforementioned base, and the first lead screw is threadedly connected to a first slide block. Rotating the first lead screw causes the first slide block to slide back and forth relative to the base. A second turntable is connected to the outer end of the first lead screw. A second lead screw is rotatably connected to the aforementioned first slide block, and the second lead screw is threadedly connected to the second slide block. Rotating the second lead screw causes the second slide block to slide up and down relative to the first slide block. A third turntable is connected to the outer end of the second lead screw. In use, the back-and-forth position of the trimming pen can be adjusted by rotating the second turntable, while the up-and-down position of the trimming pen can be adjusted by rotating the third turntable. The operation is convenient and the structure is stable.

[0015] Furthermore, a grinding disc mounting base is rotatably connected to the base corresponding to the inner position of the fixed shell. The motor is located inside the base, and its shaft is connected to the shaft of the grinding disc mounting base. The grinding disc can be detachably mounted on the grinding disc mounting base. Starting the motor will drive the grinding disc mounting base to rotate, and the rotation of the mounting base will simultaneously drive the grinding disc to rotate. This solution, by adding a grinding disc mounting base structure, facilitates the replacement of the grinding disc.

[0016] The movable housing of this utility model tool sharpening machine can be adjusted according to the height of the grinding disc. When the height of the grinding disc is consumed to a level lower than the opening height of the movable housing, the opening height of the movable housing can be adjusted to be lower than the height of the grinding disc. In this way, the grinding disc can continue to be used for sharpening operations, so as to make full use of each grinding disc, reduce grinding disc waste, and reduce grinding costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the tool sharpening machine in the first position according to an embodiment of the present invention.

[0018] Figure 2 This is a partial sectional view of the knife sharpening machine according to an embodiment of the present utility model.

[0019] Figure 3 This is a schematic diagram illustrating the use of the knife sharpening machine according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the knife sharpening machine in the second position according to an embodiment of the present invention.

[0021] Figure 5 for Figure 4 Enlarged view of part A in the image. Detailed Implementation

[0022] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0023] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0025] Example 1

[0026] like Figure 1 , 2 As shown, this embodiment provides a knife sharpening machine, including a base 1, a grinding disc 2 disposed on the base 1, a motor 3 for driving the grinding disc 2 to rotate, and a protective shell disposed on the base 1 corresponding to the outer side of the grinding disc 2. The protective shell includes a fixed shell 41 disposed on the base 1, and a movable shell 42 that can move up and down relative to the fixed shell 41 and has an opening 421. The height of the fixed shell 41 is less than the height of the grinding disc 2, the height of the opening 421 of the movable shell 42 is greater than the height of the fixed shell 41, and the height of the opening 421 of the movable shell 42 is less than the height of the grinding disc 2.

[0027] The aforementioned knife sharpening machine also includes a pushing mechanism for pushing the movable shell 42 to move up and down. The movable shell 42 is located inside the fixed shell 41. The pushing mechanism includes a rotating rod 51 rotatably connected to the outside of the fixed shell 41, and a first fixed seat 52 located on the outside of the movable shell 42. Rotating the rotating rod 51 will drive the first fixed seat 52 to move up and down along the rotating rod 51. While the first fixed seat 52 moves up and down, it will drive the movable shell 42 to move up and down, thereby realizing the structural function of the pushing mechanism to push the movable shell 42 to move up and down.

[0028] Specifically, the aforementioned pushing mechanism also includes a second fixed seat 53 located on the outside of the fixed housing 41, a sleeve 54 located on the second fixed seat 53, a slide cylinder 55 slidably fitted inside the sleeve 54, a rotating rod 51 rotatably connected to the inside of the sleeve 54, the upper end of the rotating rod 51 passing through the first fixed seat 52 so that the first fixed seat 52 can move up and down along the rotating rod 51, and the outer side of the rotating rod 51 is threadedly connected to the inner side of the slide cylinder 55. Rotating the rotating rod 51 will cause the slide cylinder 55 to slide up and down along the sleeve 54 via threaded transmission, and the upper end of the slide cylinder 55 abuts against the lower part of the first fixed seat 52.

[0029] When the height of the movable housing 42 needs to be adjusted, the rotating rod 51 can be rotated forward. The rotating rod 51 will be threaded through the slide cylinder 55 and move upward along the sleeve 54. At the same time, the slide cylinder 55 will push the first fixed seat 52 upward, causing the movable housing 42 to move upward, thus adjusting the height of the movable housing 42 to rise. Conversely, rotating the rotating rod 51 in the opposite direction will be threaded through the slide cylinder 55 and move downward along the sleeve 54. At the same time, the first fixed seat 52 and the movable housing 42 will also move downward along with the slide cylinder 55, thus adjusting the height of the movable housing 42 to fall.

[0030] like Figure 3 As shown, when sharpening the tool 20, the cutting edge of the tool 20 needs to be placed flat on the grinding disc 2 for grinding to ensure the sharpening effect. However, as the grinding disc 2 is continuously consumed during the grinding process, its height decreases. When the height of the grinding disc 2 is reduced to less than the height of the opening 421 of the movable housing 42, the tool will be blocked by the opening 421 of the movable housing 42. This forces the cutting edge of the tool 2 to be placed flat on the grinding disc 2, making it impossible to continue sharpening the tool using the grinding disc 2. Consequently, a new grinding disc 2 must be replaced, wasting the grinding disc 2 resource.

[0031] To address the issue of wasted grinding disc 2 resources, the tool sharpening machine in this embodiment divides the protective shell into a fixed shell 41 and a movable shell 42. The movable shell 42 can be adjusted according to the height of the grinding disc 2. When the height of the grinding disc 2 is reduced to less than the height of the opening 421 of the movable shell 42, the user can rotate the rotating rod 51 to lower the height of the movable shell 42, so that the height of the opening 421 of the movable shell 42 is lower than the height of the grinding disc 2. This allows the grinding disc 2 to continue to be used for sharpening operations, making full use of each grinding disc 2, thereby reducing the waste of the grinding disc 2 and lowering grinding costs.

[0032] Example 2

[0033] This embodiment is a further improvement on the tool sharpening machine structure of Embodiment 1. The improvement lies in, for example... Figure 1 As shown, the aforementioned driving mechanism comprises three parts: a first driving mechanism 61, a second driving mechanism 62, and a third driving mechanism 63. Each driving mechanism is located at a corner of the protective shell. These three driving mechanisms propel the movable shell 42 up and down, ensuring that the movable shell 42 maintains a straight upward or downward trajectory, resulting in smoother transmission.

[0034] In this design, the lower end of the rotating rod 61 of the first pushing mechanism 61 is connected to a first turntable 511. Rotating the first turntable 511 drives the rotating rod 51 to rotate, thus facilitating the operation of the rotating rod 51 of the first pushing mechanism 61. The rotating rod 51 of the first pushing mechanism 61 is connected to the rotating rod 51 of the second pushing mechanism 62, and the rotating rod 51 of the second pushing mechanism 62 is connected to the rotating rod 51 of the third pushing mechanism 63. Thus, when the rotating rod 51 of the first pushing mechanism 61 rotates, it drives the rotating rod 51 of the second pushing mechanism 62 to rotate, and vice versa. This ensures that the rotating rods 51 of each pushing mechanism rotate synchronously, guaranteeing that the movable shell 42 moves in a straight line and preventing tilting during movement.

[0035] like Figure 4 , 5 As shown, the first pushing mechanism 61's rotating rod 51 is connected to a first driving gear 611, the second pushing mechanism 62's rotating rod 51 is connected to a first driven gear 621 and a second driving gear 622, and the third pushing mechanism 63's rotating rod 51 is connected to a second driven gear 631. The first driving gear 611 and the first driven gear 621 are connected via a first toothed belt 71, and the second driving gear 622 and the second driven gear 631 are connected via a second toothed belt 72. In use, rotating the first turntable 511 causes the rotating rod 51 of the first pushing mechanism 61 to rotate, which in turn drives the first driving gear 611 to rotate. Simultaneously, the first driving gear 611 drives the first driven gear 621 to rotate via the first toothed belt 71, and also drives the second driving gear 622 to rotate via the second toothed belt 72, thus achieving the structural function of synchronous rotation of the rotating rods 51 of each pushing mechanism.

[0036] As an improvement to this embodiment, such as Figure 5 As shown, the outer side of the aforementioned fixed shell 41 is provided with a base plate 411 corresponding to the upper and lower sides of the two toothed belts. A tension wheel 412 is rotatably connected between the two base plates 411 corresponding to the inner side of the toothed belts. The tension wheel 412 abuts against the inner side of the toothed belts, which can prevent the toothed belts from loosening and improve the transmission stability between the toothed belts and gears.

[0037] Furthermore, each of the two base plates 411 is provided with a groove 4110. A screw 413 passes through the groove 4110 of the two base plates 411 and is threadedly connected to a nut. A tensioning wheel 412 is fitted on the outside of the screw 413 at a position corresponding to the two base plates 411. This allows adjustment of the position of the tensioning wheel 412, which can better tighten the toothed belt. In use, when the toothed belt becomes loose, the nut can be loosened. At this time, the screw 413 can be pushed to slide along the groove 4110 to adjust the position of the tensioning wheel 412 so that it abuts against the inner side of the toothed belt. Then, the nut is tightened. At this time, the screw 412 can no longer slide along the groove 4110, thereby locking the position of the tensioning wheel 412 so that the tensioning wheel 412 can tighten the toothed belt, thereby ensuring the transmission stability between the toothed belt and the gear.

[0038] Example 3

[0039] This embodiment is a further improvement on the tool sharpening machine structure of Embodiment 2. The improvement lies in that, as... Figure 2 As shown, the aforementioned tool sharpening machine also includes a dressing mechanism for repairing and smoothing the grinding surface (i.e., the surface of the grinding disc 2) of the grinding disc 2. The dressing mechanism includes a base 8 located on the outside of the base 1, a first slide 81 located on the base 8 and capable of sliding back and forth relative to the base 8, a second slide 82 located in front of the first slide 81 and capable of sliding up and down relative to the first slide 81, a support rod 83 located in front of the second slide 82, and a dressing pen 84 located at the lower front end of the support rod 83. The dressing pen 84 is located above the grinding disc 2, and an clearance opening 422 is provided on the movable housing 42 corresponding to the position of the dressing pen 84.

[0040] like Figure 4 As shown, a first lead screw 85 is rotatably connected to the base 8. The first lead screw 85 is threadedly connected to the first slide block 81. Rotating the first lead screw 85 causes the first slide block 81 to slide back and forth relative to the base 8. A second turntable 851 is connected to the outer end of the first lead screw 85 to facilitate its rotation. A second lead screw 86 is rotatably connected to the first slide block 81. The second lead screw 86 is threadedly connected to the second slide block 82. Rotating the second lead screw 86 causes the second slide block 82 to slide up and down relative to the first slide block 81. A third turntable 861 is connected to the outer end of the second lead screw 86 to facilitate its rotation.

[0041] In use, when the second turntable 851 is rotated, causing the first lead screw 85 to rotate, the first lead screw 85 will drive the first slide block 81 to slide back and forth relative to the base 8. Simultaneously, the sliding of the first slide block 81 will move the trimming pen 84, thereby adjusting its position. When the third turntable 861 is rotated, causing the second lead screw 86 to rotate, the second lead screw 86 will drive the second slide block 82 to slide up and down relative to the first slide block 81. Simultaneously, the sliding of the second slide block 82 will move the trimming pen 84, thereby adjusting its position.

[0042] During the sharpening process, after prolonged use, unevenness inevitably develops on the grinding disc 2, affecting the sharpening effect on the tool 20. The user can use a trimming pen to smooth the surface of the grinding disc 2. The smoothing and repair process is as follows: First, the motor 3 drives the grinding disc 2 to rotate. Then, by rotating the third turntable 861 and the second turntable 851, the vertical and horizontal positions of the trimming pen 84 are adjusted so that the lower end of the trimming pen 84 is against the surface of the grinding disc 2. As the grinding disc 2 rotates, the trimming pen 84 repairs it. By adjusting the forward and backward movement of the trimming pen 84 relative to the surface of the grinding disc 2, a comprehensive repair can be achieved. After the trimming pen 84 smooths the surface of the grinding disc 2, the sharpening process can be performed, resulting in a better sharpening effect on the tool 20.

[0043] As an improvement to this embodiment, for example... Figure 2 As shown, a grinding disc mounting base 9 is rotatably connected to the base 1, corresponding to the inner position of the fixed shell 41. A motor 3 is located inside the base 1, and the shaft of the motor 3 is connected to the axis of the grinding disc mounting base 9. The shaft of the motor 3 is aligned with the axes of the grinding disc mounting base 9 and the grinding disc 2. The grinding disc 2 can be detachably mounted on the grinding disc mounting base 9. Starting the motor 3 will drive the grinding disc mounting base 9 to rotate, and the rotation of the grinding disc mounting base 9 will simultaneously drive the grinding disc 2 to rotate. This design, by adding the grinding disc mounting base 9 structure, facilitates the replacement of the grinding disc 2.

[0044] Furthermore, the height of the aforementioned fixing shell 41 is less than or equal to the height of the grinding disc mounting base 9, to prevent the tool 20 from being blocked by the fixing shell 41 and unable to be placed flat on the grinding disc 2 during sharpening. Figure 1 As shown, the aforementioned movable shell 42 includes a shell body 423 and a shell cover 424. The shell cover 424 is rotatably connected to the top of the shell body 423. The shell cover 424 can be rotated to open and close relative to the shell body 423. When the grinding disc 2 needs to be replaced, the shell cover 424 can be opened to easily remove the grinding disc 2, making the replacement operation of the grinding disc 2 more convenient. After the grinding disc 2 is replaced, the shell cover 424 can be rotated to close, thus protecting the grinding disc 2.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A knife sharpening machine, comprising a base (1), a grinding disc (2) disposed on the base (1), a motor (3) for driving the grinding disc (2) to rotate, and a protective shell disposed on the base (1) corresponding to the outer side of the grinding disc (2), characterized in that: The protective shell includes a fixed shell (41) disposed on the base (1) and a movable shell (42) that can move up and down relative to the fixed shell (41) and has an opening (421). The height of the fixed shell (41) is less than the height of the grinding disc (2). The tool sharpening machine also includes a pushing mechanism for pushing the movable shell (42) to move up and down.

2. The tool sharpening machine according to claim 1, characterized in that: The pushing mechanism includes a rotating rod (51) rotatably connected to the outside of the fixed shell (41) and a first fixed seat (52) located on the outside of the movable shell (42). Rotating the rotating rod (51) will drive the first fixed seat (52) to move up and down along the rotating rod (51).

3. The tool sharpening machine according to claim 2, characterized in that: The pushing mechanism also includes a second fixed seat (53) located on the outside of the fixed shell (41), a sleeve (54) located on the second fixed seat (53), a slide cylinder (55) placed inside the sleeve (54), a rotating rod (51) rotatably connected to the inside of the sleeve (54), and the outside of the rotating rod (51) is threadedly connected to the inside of the slide cylinder (55). Rotating the rotating rod (51) will cause the slide cylinder (55) to slide up and down along the sleeve (54) via threaded transmission, and the upper end of the slide cylinder (55) abuts against the bottom of the first fixed seat (52).

4. The tool sharpening machine according to claim 2 or 3, characterized in that: The aforementioned pushing mechanism has three parts, namely the first pushing mechanism (61), the second pushing mechanism (62), and the third pushing mechanism (63). Each pushing mechanism is arranged at the corner of the protective shell (4). The rotating rod (51) of the first pushing mechanism (61) is connected to the first turntable (511). The rotating rod (51) of the first pushing mechanism (61) is connected to the rotating rod (51) of the second pushing mechanism (62) through a transmission connection. The rotating rod (51) of the second pushing mechanism (62) is connected to the rotating rod (51) of the third pushing mechanism (63) through a transmission connection.

5. The tool sharpening machine according to claim 4, characterized in that: The first pushing mechanism (61) has a rotating rod (51) connected to a first driving gear (611), the second pushing mechanism (62) has a rotating rod (51) connected to a first driven gear (621) and a second driving gear (622), and the third pushing mechanism (63) has a rotating rod (51) connected to a second driven gear (631). The first driving gear (611) and the first driven gear (621) are connected by a first toothed belt (71), and the second driving gear (622) and the second driven gear (631) are connected by a second toothed belt (72).

6. The tool sharpening machine according to claim 5, characterized in that: The fixed shell (41) has a base plate (411) on the outer side corresponding to the upper and lower sides of the two toothed belts. A tension wheel (412) is rotatably connected between the two base plates (411) corresponding to the inner side of the toothed belts. The tension wheel (412) abuts against the inner side of the toothed belts.

7. The tool sharpening machine according to claim 6, characterized in that: The two substrates (411) are respectively provided with grooves (4110), a screw (413) passes through the grooves (4110) of the two substrates (411) and is threadedly connected to a nut, and a tensioning wheel (412) is fitted on the outside of the screw (413) at the position between the two substrates (411).

8. The tool sharpening machine according to claim 4, characterized in that: It also includes a trimming mechanism for repairing and smoothing the grinding surface of the grinding disc (2). The trimming mechanism includes a base (8) located on the outside of the base (1), a first slide (81) located on the base (8) and capable of sliding back and forth relative to the base (8), a second slide (82) capable of sliding up and down relative to the first slide (81), a support rod (83) connected to the second slide (82), and a trimming pen (84) located at the front end of the support rod (83). The trimming pen (84) is located above the grinding disc (2), and the movable shell (42) has an avoidance opening (422) corresponding to the position of the trimming pen (84).

9. The tool sharpening machine according to claim 8, characterized in that: A first lead screw (85) is rotatably connected to the base (8). The first lead screw (85) is threadedly connected to the first slide (81). Rotating the first lead screw (85) will cause the first slide (81) to slide back and forth relative to the base (8). The outer end of the first lead screw (85) is connected to a second turntable (851). A second lead screw (86) is rotatably connected to the first slide (81). The second lead screw (86) is threadedly connected to the second slide (82). Rotating the second lead screw (86) will cause the second slide (82) to slide up and down relative to the first slide (81). The outer end of the second lead screw (86) is connected to a third turntable (861).

10. The tool sharpening machine according to claim 1, characterized in that: A grinding disc mounting base (9) is rotatably connected to the base (1) corresponding to the inner position of the fixed shell (41). The motor (3) is located inside the base (1). The rotating shaft of the motor (3) is connected to the shaft of the grinding disc mounting base (9). The grinding disc (2) can be detachably installed on the grinding disc mounting base (9).

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