An electric knife sharpener

Abstract

The application relates to an electric knife sharpener, and relates to the technical field of knife sharpening. The electric knife sharpener comprises a device shell and a knife sharpening device arranged in the device shell. An outer side of the device shell is provided with a knife sharpening groove for sliding of a blade part of a knife, and a knife sharpening opening is arranged at one end of the knife sharpening groove. The knife sharpening device is provided with two opposite rotating knife disc assemblies for sharpening the blade part of the knife and a driving mechanism for driving the rotation of the knife disc assemblies. The knife disc assemblies are arranged at the knife sharpening opening. The application can improve the sharpening effect of the blade part of the knife.

Description

Technical Field

[0001] This application relates to the field of tool grinding, and more particularly to an electric tool grinder. Background Technology

[0002] Knives are indispensable tools in daily life and industrial production. With repeated use, the cutting edge gradually dulls, leading to a decrease in cutting effectiveness and efficiency. This not only makes cutting more difficult but can also cause safety accidents. Therefore, it is necessary to sharpen knives regularly to maintain their cutting performance and extend their service life.

[0003] Common knife sharpening methods mainly include whetstones and sharpening machines. Whetstones, as the most classic sharpening tool, require the user to hold the knife and rub it back and forth at a specific angle. This method demands a high level of skill from the user, who must maintain a consistent sharpening angle; angles that are too large or too small will not result in effective sharpening. Sharpening machines have lowered the skill requirements for manual sharpening, using a rotating grinding wheel to grind the knife surface. However, the sharpening process still relies heavily on the user's hand strength, making it difficult to ensure consistent pressure and speed with each stroke. For less experienced users, the sharpening results are often less than ideal.

[0004] In view of the aforementioned technologies, the inventors believe that there is a need to provide a sharpening tool that makes knife sharpening simpler and more efficient. Utility Model Content

[0005] To improve the sharpening effect of the cutting edge of a tool, this application provides an electric tool sharpener.

[0006] The electric knife sharpener provided in this application adopts the following technical solution: An electric knife sharpener includes a housing and a sharpening device disposed within the housing; the outer side of the housing has a sharpening groove for sliding of the cutting edge of a knife, and a sharpening opening is provided at one end of the sharpening groove; the sharpening device has two relatively rotating cutter disc assemblies for sharpening the cutting edge of the knife and a drive mechanism for driving the cutter disc assemblies to rotate; the cutter disc assemblies are arranged at the sharpening opening.

[0007] By adopting the above technical solution, the electric knife sharpener includes a device housing and a sharpening device. The outer side of the device housing has a sharpening groove and a sharpening edge. The sharpening device has a relatively rotating cutter disc assembly and a drive mechanism. The cutter disc assembly is arranged at the sharpening edge. The sharpening groove on the outer side of the device housing can guide the cutting edge of the knife to the sharpening edge. The drive mechanism drives the two relatively rotating cutter disc assemblies to sharpen the cutting edge of the knife, thereby realizing the electric knife sharpening function and improving the sharpening effect and efficiency.

[0008] Optionally, the sharpening device includes a sharpening base, two tool holder units rotatably arranged on the sharpening base for mounting the tool disc assembly, and an elastic element mounted between the two tool holder units and driving the two tool disc assemblies to always tend to move closer to each other; the sharpening device is also provided with an adjustment mechanism to limit the deflection of the tool holder units.

[0009] By adopting the above technical solution, a grinding station is set up to install the tool holder unit. The tool holder unit can be used to install the tool disc assembly. The elastic element makes the two tool disc assemblies always tend to move closer to each other, which helps to make the two tool disc assemblies fit more closely to the cutting edge of the tool, thus improving the grinding effect. The adjustment mechanism can limit the deflection of the tool holder unit, making the position of the tool disc assembly more stable and improving the grinding accuracy and stability.

[0010] Optionally, the tool holder unit includes a tool holder housing rotatably mounted on the grinding holder and a drive shaft mounted on the top of the tool holder housing and connected to the central axis of the tool disc assembly; the tool disc assembly includes a plurality of grinding discs mounted on the drive shaft and a partition block separating adjacent grinding discs; the grinding discs of the two tool disc assemblies are arranged in a staggered manner; and the end of the drive shaft is provided with a fastening nut for pressing the grinding discs against the drive shaft.

[0011] By adopting the above technical solution, multiple grinding discs are installed on the drive shaft, and the separator blocks separate adjacent grinding discs, which helps the grinding discs to act on both sides of the tool. The grinding discs of the two disc assemblies are staggered, which can more comprehensively grind the cutting edge of the tool. The fastening nuts press the grinding discs tightly against the drive shaft, reducing the probability of the grinding discs loosening, improving the stability of the grinding, and thus improving the grinding effect.

[0012] Optionally, the sharpening device further includes a transmission mechanism connecting the drive shaft and the drive mechanism; the transmission mechanism includes a first gear mounted on the end of the drive shaft of one of the tool holder units, a second gear meshing with the first gear, a third gear mounted on the end of the drive shaft of another tool holder unit, and a fourth gear meshing with both the second gear and the third gear.

[0013] By adopting the above technical solution, the sharpening device also includes a transmission mechanism connecting the drive shaft and the drive mechanism. The transmission mechanism consists of a first gear, a second gear, a third gear and a fourth gear. It can drive the first gear and the fourth gear to rotate through the second gear, and drive the third gear to rotate through the fourth gear. This facilitates the power transmission of the drive mechanism, causing the two cutter disc assemblies to rotate relative to each other, thereby sharpening the cutting edge of the tool.

[0014] Optionally, the drive mechanism includes a drive motor installed in the housing of the device, a rotating roller arranged on one side of the second gear, and a rotating belt sleeved on the rotating roller and the output end of the drive motor; the end of the rotating roller is provided with a rotating gear that meshes with the second gear.

[0015] By adopting the above technical solution, the drive motor drives the rotating roller to rotate through the rotating belt. The rotating gear at the end of the rotating roller meshes with the second gear to realize power transmission, thereby driving the cutter head assembly to rotate. This can effectively drive the cutter head assembly to rotate relative to each other to grind the cutting edge of the tool, providing power for the normal operation of the grinder.

[0016] Optionally, the adjustment mechanism includes an adjustment rod rotatably mounted on the device housing, an adjustment plate connected to one side of the cutter head assembly, and an adjustment pressure tube sleeved on the adjustment rod with its bottom surface abutting against the top of the adjustment plate; the adjustment rod is provided with an external thread in the circumferential direction; the inner wall of the adjustment pressure tube is provided with an internal thread that mates with the external thread.

[0017] By adopting the above technical solution, the adjustment mechanism, through the cooperation of the adjustment rod, adjustment plate and adjustment pressure tube, and by utilizing the interaction between the external thread of the adjustment rod and the internal thread of the adjustment pressure tube, can rotate the adjustment pressure tube, thereby adjusting the position between the two sets of cutter head assemblies, which is beneficial to adapting to different sharpening needs and improving the sharpening effect.

[0018] Optionally, the top surface of the adjusting plate is provided with an adjusting protrusion that abuts against the bottom surface of the adjusting pressure tube; the bottom of the adjusting pressure tube is provided with an adjusting protrusion that abuts against the adjusting protrusion.

[0019] By adopting the above technical solution, the bottom of the adjusting convex ring at the bottom of the adjusting pressure tube abuts against the adjusting protrusion at the top of the adjusting plate. The adjusting protrusion can slide at the bottom of the adjusting convex ring, which is more conducive to position adjustment and reduces the resistance of sliding friction between the surface of the adjusting plate and the adjusting pressure tube. The larger contact area of ​​the adjusting convex ring can more effectively apply the pressure of the adjusting pressure tube to the adjusting plate, thereby more accurately adjusting the rotation angle of the tool holder unit, improving the precision of the adjustment of the position and spacing of the tool disc assembly, and helping to improve the grinding accuracy and grinding effect.

[0020] Optionally, the device housing has an adjustment hole through which the adjusting pressure tube passes; an adjustment knob is installed at the end of the adjusting pressure tube that passes through the adjustment hole.

[0021] By adopting the above technical solution, the device housing has an adjustment hole through which the adjustment pressure tube can pass. An adjustment knob is installed at the end of the adjustment pressure tube, which makes it easy for the user to operate the adjustment pressure tube. The adjustment pressure tube can be rotated to a fixed angle according to the usage requirements, thereby facilitating the adjustment of the distance between the blade disc components, which is conducive to achieving a better grinding effect.

[0022] Optionally, two synchronous gears are provided between the two cutter head assemblies, which are installed one-to-one on the bottom of the cutter holder unit and mesh with each other.

[0023] By adopting the above technical solution, two synchronous gears are installed at the bottom of the tool holder unit in a one-to-one correspondence between the two tool disc assemblies. The two synchronous gears mesh with each other, and the synchronous rotation between the synchronous gears enables the two tool disc assemblies to rotate synchronously, which improves the stability and consistency of the tool disc assembly grinding process and improves the grinding effect.

[0024] Optionally, the elastic element includes an elastic torsion spring; the sharpening device is provided with fixing bolts that fix the two ends of the elastic torsion spring to the two tool holder units respectively.

[0025] By adopting the above technical solution, the elastic torsion spring can drive the two cutter head assemblies to always tend to move closer to each other. The two ends of the elastic torsion spring can be fixed to the two cutter head units by the fixing bolts, which helps to improve the stability of the elastic torsion spring installation and enables the cutter head assembly to better grind the cutting edge of the cutter.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. An electric knife sharpener, by setting a sharpening groove on the housing and a sharpening chute at one end of the sharpening groove, can guide the cutting edge of the knife to be sharpened at the correct angle along the length of the sharpening groove; the knife disc assembly is arranged at the sharpening chute, and the drive mechanism can drive two relatively rotating knife disc assemblies to sharpen the cutting edge of the knife, thereby improving the sharpening effect and sharpening efficiency. 2. By setting up a grinding station and a tool holder unit that rotates relative to the grinding station, and installing elastic elements and synchronous gears between the tool holder units to drive the two tool disc assemblies to always move closer to each other, the distance between the tool disc assemblies can be adjusted to meet different grinding requirements; the design of the elastic elements can also drive the tool disc assembly to fit more closely with the cutting edge, thus improving the grinding effect of the tool disc assembly. 3. By setting a synchronous gear, the two cutter head assemblies can be driven to rotate synchronously with consistent rotation angles, which improves the stability and consistency of the cutter head assembly grinding process and helps to improve the grinding effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the electric knife sharpener according to an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the grinding device according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram showing the connection between the tool holder unit and the grinding tool holder in an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the structure of the elastic element in an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the engagement between the synchronous gear and the tool holder unit in an embodiment of this application.

[0032] Figure 6 This is a schematic diagram of the structure of the adjustment mechanism in an embodiment of this application.

[0033] Figure 7 This is a schematic diagram of the drive mechanism in an embodiment of this application.

[0034] Figure 8 This is a schematic diagram of the transmission mechanism in an embodiment of this application.

[0035] Figure 9 This is a schematic diagram of the cutter head assembly according to an embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Device housing; 11. Grinding groove; 12. Grinding edge; 13. Adjustment hole; 14. Support base; 2. Grinding device; 21. Grinding holder; 211. Fixing frame; 212. Side fixing plate; 22. Tool holder unit; 221. Tool holder housing; 222. Tool holder rotating shaft; 223. Drive shaft; 2231. Drive connecting rod; 2232. Fastening nut; 23. Elastic element; 231. Elastic arm; 2311. Fixing ring; 24. Fixing bolt; 241. Fixing stud; 242. Fixing screw head; 25. Synchronizing gear 26. Wheel; 261. Adjusting mechanism; 262. Adjusting rod; 262. Adjusting pressure tube; 2621. Adjusting convex ring; 263. Adjusting plate; 2631. Adjusting convex block; 264. Adjusting knob; 2641. Anti-slip texture; 27. Cutter disc assembly; 271. Grinding disc; 272. Separator block; 28. Drive mechanism; 281. Drive motor; 282. Rotating roller; 283. Rotating belt; 284. Rotating gear; 29. ​​Transmission mechanism; 291. First gear; 292. Second gear; 293. Third gear; 294. Fourth gear. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0038] This application discloses an electric knife sharpener. (Refer to...) Figure 1An electric knife sharpener includes a housing 1 and a sharpening device 2 disposed within the housing 1. A sharpening groove 11 for sliding of the knife cutting edge is formed on the outer side of the housing 1, and a sharpening opening 12 is formed at one end of the groove 11. The sharpening groove 11 is located at the top of the housing 1, extending longitudinally through the upper surface of the housing 1. The groove walls are vertical, and the bottom is arc-shaped, facilitating the sliding arrangement of the knife cutting edge. The sharpening opening 12 is located at one end of the sharpening groove 11, gradually increasing in size towards the end along the length of the groove 11, making it easier to observe the sharpening process and adjust the knife's grinding.

[0039] Reference Figure 1 and Figure 2 The sharpening device 2 has two relatively rotating cutter head assemblies 27 for sharpening the cutting edges of cutting tools and a drive mechanism 28 for driving the cutter head assemblies 27 to rotate. The sharpening device 2 includes a sharpening base 21 and two relatively rotating cutter holder units 22 arranged on the sharpening base 21 for mounting the cutter head assemblies 27. The sharpening base 21 includes a fixing frame 211 fixed to the bottom surface of the device housing 1 and two side fixing plates 212 vertically arranged on the top of the fixing frame 211.

[0040] Reference Figure 1 and Figure 3 The tool holder unit 22 includes a tool holder housing 221 rotatably mounted on the grinding holder 21. A horizontally penetrating tool holder shaft 222 is provided at the bottom of the tool holder housing 221. Both ends of the tool holder shaft 222 pass through side fixing plates 212, and fixing nuts are installed at the ends to reduce the probability of the tool holder shaft 222 falling off. The two tool holder housings 221 are located on both sides of the grinding edge 12, arranged opposite each other with the extension line of the grinding groove 11 as the central axis.

[0041] Reference Figure 2 and Figure 4The sharpening device 2 also includes an elastic element 23 installed between the two tool holder units 22 and driving the two tool disc assemblies 27 to always tend to move closer to each other. The elastic element 23 includes an elastic torsion spring, with elastic arms 231 extending from both ends of the elastic torsion spring to abut against the side walls of the tool holder housing 221. The tool holder unit 22 is provided with fixing bolts 24 that fix the elastic arms 231 at both ends of the elastic torsion spring to the side walls of the two tool holder housings 221 respectively. The ends of the elastic arms 231 are provided with fixing rings 2311. The fixing bolts 24 have fixing studs 241 that pass through the fixing rings 2311 and connect to the tool holder housing 221, and fixing heads 242 located at the ends of the fixing bolts 24. The edges of the fixing heads 242 extend outward, with a radius not less than the radius of the fixing rings 2311, reducing the probability of the fixing rings 2311 detaching. When the fixing bolt 24 passes through the fixing ring 2311 and is connected to the side wall of the tool holder housing 221, the elastic arms 231 of the elastic torsion spring tend to move closer to each other. The fixing screw head 242 can press the fixing ring 2311 against the side wall of the tool holder housing 221, so that when the elastic arms 231 move closer, they can drive the tool holder housing 221 to move closer.

[0042] Reference Figure 2 and Figure 5 A symmetrically arranged synchronous gear 25 is provided between the two cutter head assemblies 27. The synchronous gear 25 consists of two gears 25 respectively mounted on the bottom of the base housing and meshing with each other. One synchronous gear 25 is mounted on the cutter head shaft 222 between one cutter head housing 221 and the side fixing plate 212, and the other synchronous gear 25 is mounted on the cutter head shaft 222 between the other cutter head housing 221 and the side fixing plate 212. When the cutter head housing 221 rotates, it drives the cutter head shaft 222 to rotate. The cutter head shaft 222 drives one synchronous gear 25 to rotate, which in turn drives the other synchronous gear 25, achieving relative synchronous rotation and causing the two cutter head housings 221 to rotate relative synchronously.

[0043] Reference Figure 2 and Figure 6The sharpening device 2 is also equipped with an adjustment mechanism 26 to limit the deflection of the tool holder unit 22. The adjustment mechanism 26 includes an adjustment rod 261 rotatably mounted on the device housing 1, an adjustment plate 263 connected to one side of the tool disc assembly 27, and an adjustment pressure tube 262 sleeved on the adjustment rod 261 with its bottom surface abutting against the top of the adjustment plate 263. The adjustment rod 261 is vertically arranged on one side of the tool holder unit 22, and the adjustment rod 261 has external threads in its circumference, with its bottom mounted on a fixing frame 211. The inner wall of the adjustment pressure tube 262 has internal threads that mate with the external threads. When the adjustment pressure tube 262 is rotated, the internal threads can move downward along the external threads, allowing the adjustment pressure tube 262 to move along the length of the adjustment rod 261. The device housing 1 has an adjustment hole 13 through which the adjustment pressure tube 262 passes. An adjustment knob 264 is installed at the end of the adjustment pressure tube 262 that passes through the adjustment hole 13. The adjustment knob 264 has anti-slip raised texture 2641 around its circumference to increase friction and facilitate the rotation of the adjustment knob 264.

[0044] Reference Figure 3 and Figure 6 The adjusting plate 263 includes a connecting part connected to the side wall of the tool holder housing 221 and an adjusting part abutting against the bottom of the adjusting pressure tube 262. The connecting part fits against the side wall of the tool holder housing 221 and is fixed by bolts. The adjusting part extends to the bottom side of the adjusting pressure tube 262 and is provided with an adjusting protrusion 2631 abutting against the bottom surface of the adjusting pressure tube 262. The bottom of the adjusting pressure tube 262 is provided with an adjusting protrusion ring 2621 abutting against the adjusting protrusion 2631, so that the adjusting protrusion 2631 can slide on the bottom surface of the adjusting protrusion ring 2621, increasing the sliding surface and reducing the probability of disengagement. Rotating the adjusting knob 264 causes the adjusting pressure tube 262 to move downward along the adjusting rod 261. The adjusting protrusion ring 2621 at the bottom of the adjusting pressure tube 262 can transfer the downward pressure force to the adjusting protrusion 2631, thereby transmitting it to the adjusting part and the connecting part. The connecting part causes the tool holder housing 221 to rotate downward around the tool holder rotation axis 222.

[0045] Reference Figure 2 and Figure 7 The drive mechanism 28 includes a drive motor 281 installed inside the device housing 1, a rotating roller 282 arranged on one side of a tool holder unit 22, and a rotating belt 283 sleeved between the rotating roller 282 and the output end of the drive motor 281. The drive motor 281 is connected to the inner wall of the device housing 1, and its output shaft is arranged horizontally. The device housing 1 also has a support base 14 located on one side of the tool holder housing 221 for the rotating roller 282 to be rotatably mounted. The support base 14 has a support hole through which the rotating roller 282 passes. One end of the rotating roller 282 supports one side of the rotating belt 283, and the other end is equipped with a rotating gear 284. When the drive motor 281 is running, the output shaft drives the rotating belt 283 to move, the rotating belt 283 drives the rotating roller 282 to rotate, and the rotating roller 282 drives the rotating gear 284 at its end to rotate.

[0046] Reference Figure 2 and Figure 8 The tool holder unit 22 also includes a drive shaft 223 mounted on the top of the tool holder housing 221 and connected to the central shaft of the tool disc assembly 27. The sharpening device 2 also includes a transmission mechanism 29 connecting the drive shaft 223 and the drive mechanism 28. The transmission mechanism 29 includes a first gear 291 mounted near the end of the drive shaft 223 of the tool holder unit 22, a second gear 292 rotatably mounted on the same tool holder unit 22 and meshing with the first gear 291, a third gear 293 mounted on the end of the drive shaft 223 of another tool holder unit 22, and a fourth gear 294 meshing with both the second gear 292 and the third gear 293. The second gear 292 meshes with the rotating gear 284. When the rotating gear 284 rotates, the second gear 292 rotates, which in turn drives the first gear 291 and the fourth gear 294 to rotate. The first gear 291 drives the corresponding drive shaft 223 to rotate, and the fourth gear 294 drives the third gear 293 to rotate. The third gear 293 drives the corresponding drive shaft 223 to rotate, thus realizing the relative rotation of the two drive shafts 223.

[0047] Reference Figure 2 and Figure 9 A drive shaft 223 extends out of the tool holder housing 221 and is provided with a drive connecting rod 2231. The tool disc assembly 27 includes multiple grinding discs 271 mounted on the drive connecting rod 2231 and a separator block 272 separating adjacent grinding discs 271. The grinding discs 271 of the two tool disc assemblies 27 are arranged in a staggered manner, and the axial sides of the grinding discs 271 abut against both sides of the cutting edge of the tool. When the two drive shafts 223 rotate, they can drive the grinding discs 271 on both sides to rotate relative to each other, and the axial sides of the grinding discs 271 grind the cutting edge of the tool. The end of the drive connecting rod 2231 is provided with a fastening nut 2232 to press the grinding disc 271 against the drive shaft 223. The inner side wall of the device housing 1 is also provided with a clearance groove for the fastening nut 2232 to be arranged. In this application, the number of grinding discs 271 on the same drive connecting rod 2231 is two.

[0048] Reference Figures 1 to 9 The implementation principle of an electric knife sharpener according to an embodiment of this application is as follows: the cutting edge of the knife is slid to the sharpening mouth 12 through the sharpening groove 11. The driving mechanism 28 in the sharpening device 2 provides driving force, and the transmission mechanism 29 transmits the driving force to the driving shaft 223. The two driving shafts 223 rotate relative to each other, causing the sharpening discs 271 to rotate relative to each other, thus sharpening the cutting edge of the knife located at the sharpening mouth 12. The elastic element 23 drives the two blade disc assemblies 27 to move closer together. The adjusting mechanism 26 presses down and rotates the sharpening disc 271 on the top of one blade holder housing 221. The synchronous gear 25 between the blade holder housings 221 drives the sharpening disc 271 on the top of the other blade holder housing 221 to press down and rotate to the other side, thereby realizing the synchronous adjustment of the spacing between the sharpening discs 271 and achieving a better sharpening effect.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electric knife sharpener, characterized in that, The device includes a housing (1) and a sharpening device (2) disposed within the housing (1); the outer side of the housing (1) is provided with a sharpening groove (11) for sliding of the cutting edge of the tool, and a sharpening mouth (12) is provided at one end of the sharpening groove (11); the sharpening device (2) has two relatively rotating cutter disc assemblies (27) for sharpening the cutting edge of the tool and a drive mechanism (28) for driving the cutter disc assemblies (27) to rotate; the cutter disc assemblies (27) are arranged at the sharpening mouth (12).

2. The electric knife sharpener according to claim 1, characterized in that, The sharpening device (2) includes a sharpening base (21), two blade holder units (22) arranged rotatably on the sharpening base (21) for mounting the blade disc assembly (27), and an elastic element (23) mounted between the two blade holder units (22) and driving the two blade disc assemblies (27) to always tend to move closer to each other; the sharpening device (2) is also provided with an adjustment mechanism (26) for limiting the deflection of the blade holder units (22).

3. The electric knife sharpener according to claim 2, characterized in that, The tool holder unit (22) includes a tool holder housing (221) rotatably mounted on the grinding holder (21) and a drive shaft (223) mounted on the top of the tool holder housing (221) and connected to the central axis of the tool disc assembly (27); the tool disc assembly (27) includes a plurality of grinding discs (271) mounted on the drive shaft (223) and a partition block (272) separating adjacent grinding discs (271); the grinding discs (271) of the two tool disc assemblies (27) are arranged in a staggered manner; the end of the drive shaft (223) is provided with a fastening nut (2232) for pressing the grinding discs (271) against the drive shaft (223).

4. An electric knife sharpener according to claim 3, characterized in that, The sharpening device (2) further includes a transmission mechanism (29) connecting the drive shaft (223) and the drive mechanism (28); the transmission mechanism (29) includes a first gear (291) mounted on the end of the drive shaft (223) of one of the tool holder units (22), a second gear (292) meshing with the first gear (291), a third gear (293) mounted on the end of the drive shaft (223) of another tool holder unit (22), and a fourth gear (294) meshing with both the second gear (292) and the third gear (293) during rotation.

5. An electric knife sharpener according to claim 4, characterized in that, The drive mechanism (28) includes a drive motor (281) installed in the housing (1) of the device, a rotating roller (282) arranged on one side of the second gear (292), and a rotating belt (283) sleeved on the rotating roller (282) and the output end of the drive motor (281); the end of the rotating roller (282) is provided with a rotating gear (284) that meshes with the second gear (292).

6. An electric knife sharpener according to claim 2, characterized in that, The adjustment mechanism (26) includes an adjustment rod (261) rotatably mounted on the housing (1) of the device, an adjustment plate (263) connected to one side of the cutter head assembly (27), and an adjustment pressure tube (262) sleeved on the adjustment rod (261) and with its bottom surface abutting against the top of the adjustment plate (263); the adjustment rod (261) is provided with an external thread in the circumference; the inner wall of the adjustment pressure tube (262) is provided with an internal thread that mates with the external thread.

7. An electric knife sharpener according to claim 6, characterized in that, The top surface of the adjusting plate (263) is provided with an adjusting protrusion (2631) that abuts against the bottom surface of the adjusting pressure tube (262); the bottom of the adjusting pressure tube (262) is provided with an adjusting protrusion ring (2621) that abuts against the adjusting protrusion (2631).

8. An electric knife sharpener according to claim 6, characterized in that, The housing (1) of the device has an adjustment hole (13) through which the pressure regulating tube (262) passes; an adjustment knob (264) is installed at the end of the pressure regulating tube (262) that passes through the adjustment hole (13).

9. An electric knife sharpener according to claim 2, characterized in that, Two synchronous gears (25) are provided between the two cutter head assemblies (27), which are installed at the bottom of the cutter holder unit (22) and mesh with each other.

10. An electric knife sharpener according to claim 2, characterized in that, The elastic element (23) includes an elastic torsion spring; the sharpening device (2) is provided with fixing bolts (24) for fixing the two ends of the elastic torsion spring to the two tool holder units (22) respectively.

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