CN216371559U

CN216371559U - Polishing wheel and knife sharpener

Info

Publication number: CN216371559U
Application number: CN202122383445.0U
Authority: CN
Inventors: 徐珂; 邬春艳
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-04-26
Anticipated expiration: 2031-09-30

Abstract

The utility model provides a polishing wheel and a knife sharpener, wherein the polishing wheel comprises a side surface and a rim, a gear ring is arranged in a space formed by the rim and the side surface, the center of the gear ring is provided with a shaft hole, and the shaft hole is provided with a key notch. The polishing wheel and the gear ring of the knife sharpener are ingeniously designed into an integral structure, gear transmission is realized in a limited space, and the defects of low transmission efficiency, small transmission power, poor stability, short service life and the like caused by the conventional friction transmission are overcome; in addition, the utility model has the advantages of reliable work, long service life, high transmission efficiency, large transmission power and better stability.

Description

Polishing wheel and knife sharpener

Technical Field

The utility model relates to a water-cooled electric knife sharpener.

Background

The driving part of the existing knife sharpener comprises a motor output shaft, a friction wheel and a polishing wheel, wherein the motor output shaft drives the friction wheel to rotate through friction force, the friction wheel drives a main shaft to rotate through an elastic pin on the main shaft, and a grinding wheel is arranged on the main shaft so as to drive the grinding wheel to rotate and grind the edge of the tool; the polishing wheel is installed on the friction wheel through a screw, the friction wheel rotates and simultaneously drives the polishing wheel to rotate, and polishing of the edge of the ground cutter is achieved.

The knife sharpener has the following defects in use: 1. the friction wheel and the polishing wheel are designed in a split structure, so that on one hand, the installation is troublesome, the defects of large radial jump and large end jump exist, and meanwhile, the operation precision is poor, the operation is not stable, and the use of customers is influenced; on the other hand, the mode of driving by friction force has low transmission efficiency, small transmission power, poor stability and short service life; after the friction wheel is used for a long time, the rubber ring on the friction wheel is easy to age and deform, generates larger noise, and has serious slipping and shaking phenomena, and the motor can be damaged in serious cases, so that the transmission efficiency can be further reduced; furthermore, to prevent the polishing wheel from deforming, the polishing wheel is usually fixed to a sheet metal part, which substantially increases the assembly cost. 2. The friction wheel is realized driving the main shaft to rotate by relying on the elastic pin, the elastic pin bears little torsion, is easy to loosen, break or even fall off after being used for a long time, causes the whole machine to lose power, can not be used, and the elastic pin participates in the driven structure, poor stability, short service life and large potential failure risk.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of low transmission efficiency, small transmission power, poor stability, short service life, large potential failure risk and the like of the conventional knife sharpener drive, the utility model adopts the following scheme to solve the problems:

the utility model provides a polishing wheel which comprises a side surface and a rim, wherein a gear ring is arranged in a space formed by the rim and the side surface, and the center of the gear ring is provided with a shaft hole.

Furthermore, a plurality of reinforcing ribs are arranged between the gear ring and the shaft hole.

Further, a key notch is formed in the shaft hole.

Furthermore, the polishing wheel, the gear ring and the shaft hole are of an integrated structure.

The utility model also provides a knife sharpener which comprises a motor shaft, a main shaft and a polishing wheel, wherein the shaft end of the motor is connected with a driving gear, and the driving gear is meshed with the gear ring.

In some embodiments, the spindle further comprises a flat key, a key groove for mounting the flat key is formed in the spindle, and a notch matched with the flat key is formed in the shaft hole.

In some embodiments, the polishing wheel is made of reinforced PP, and the driving gear is made of oil-containing nylon.

The utility model achieves the following beneficial effects:

the polishing wheel and the gear ring of the knife sharpener are ingeniously designed into an integral structure, gear transmission is realized in a limited space, and the defects of low transmission efficiency, small transmission power, poor stability, short service life and the like caused by the conventional friction transmission are overcome; in addition, the utility model has the advantages of reliable work, long service life, high transmission efficiency, large transmission power and better stability.

Drawings

FIG. 1 is a schematic view of a polishing wheel according to an embodiment;

FIG. 2 is a schematic view of a first knife sharpener according to an embodiment;

FIG. 3 is a schematic view of a first knife sharpener according to an embodiment;

FIG. 4 is an enlarged view of portion A of FIG. 3;

in the above figures, 1, a knife sharpener body; 2. a motor shaft; 3. a drive gear; 4. a hexagon socket head cap screw; 5. a polishing wheel; 5-1, side; 5-2, wheel rim; 5-3, gear ring; 5-4, shaft hole; 5-5, reinforcing ribs; 5-4-1, a keyway opening; 6. a second gasket; 7. locking the handle; 8. a first gasket; 9. a flat bond; 10. a main shaft; 11. a flange plate; 12. a grinding wheel; 13. a third gasket; 14. self-locking nut.

Detailed Description

Generally, the knife sharpener drives the polishing wheel 5, the main shaft 10 and the grinding wheel 12 through friction transmission, which is relatively easy to realize, but besides inherent defects of low efficiency and small transmission power of the friction transmission, the knife sharpener also has the defects that rubber used for being rubbed with a motor shaft on the friction wheel is easy to age and deform, generates larger noise, shakes and slips, and further reduces the transmission efficiency and transmission power and shortens the service life.

The utility model adopts a gear transmission mode, although the gear transmission mode is a conventional transmission mode, the sharpener has small size, the transmission ratio is basically over 7 in order to reduce the rotating speed, the transmission ratio is large, and the space limitation is added, so that great challenge is brought to designers, and most polishing wheels 5 in the prior art are driven by an easily realized friction transmission mode.

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In a first embodiment, the polishing wheel 5 is provided, and referring to fig. 1, the polishing wheel includes a side surface 5-1 and a rim 5-2, the side surface 5-1 and the rim 5-2 define a cylindrical cavity, a ring gear 5-3 is disposed in the cylindrical cavity, and a shaft hole 5-4 is formed in the center of the ring gear. The polishing wheel is integrally of an integral structure, the polishing wheel with the gear ring is made of reinforced PP (polypropylene), and the driving gear is made of oil-containing nylon. The specific application can be described by referring to the two parts of the implementation.

In order to improve the transmission stability in later use, a plurality of reinforcing ribs 5-5 are arranged between the gear ring 5-3 and the shaft hole 5-4, and a key notch 5-4-1 is arranged at the shaft hole 5-4.

The restriction of drive ratio and design space is fully considered in this embodiment, unites two into one the design with throwing aureola 5 and ring gear, designs the ring gear in the outside of inner circle, and the maximize utilizes the space, has simplified the structure, has reduced production and assembly cost simultaneously.

In the second embodiment, referring to fig. 2, 3 and 4, the present embodiment provides a knife sharpener, which includes a motor shaft 2, a spindle 10, a grinding wheel 12 and a polishing wheel 5 in the first embodiment, wherein the end of the motor shaft 2 is connected to a driving gear 3, and the driving gear 3 is meshed with a gear ring on the polishing wheel 5.

In this embodiment, the spindle 10 is provided with a key slot for mounting the flat key 9, and correspondingly, the shaft hole of the polishing wheel 5 is provided with a notch matched with the flat key 9.

When the driving gear 3 is installed, the driving gear is sleeved on the motor shaft 2, and then the hexagon socket head cap screws penetrate through the driving gear 3 and are screwed into corresponding threads of the motor shaft 2, so that the driving gear 3 is fixed on the motor shaft 2.

The polishing wheel 5 is mounted as follows: the second gasket 6 is sleeved on the spindle 10 and attached to a spindle step, the flat key 9 is installed in a key groove corresponding to the spindle 10, a key notch 5-4-1 in the polishing wheel 5 corresponds to the flat key 9 on the spindle 10, meanwhile, a tooth surface on the gear ring is matched with a tooth surface on the driving gear, the polishing wheel 5 is installed on the spindle 10 and attached to the second gasket 6, the first gasket 8 penetrates through the spindle 10 and is attached to the outer side of the polishing wheel, and the locking handle 7 corresponds to a thread on the spindle 10 and is screwed onto the spindle 10, so that the polishing wheel 5 can be locked.

The flange plate 11 penetrates through the other side of the main shaft 10, the step of the main shaft 10 is attached, the grinding wheel 12 penetrates through the main shaft 10, the flange plate 11 is attached, the third gasket 13 penetrates through the main shaft 10, the grinding wheel 12 is attached, the self-locking nut 14 is screwed into the thread on the main shaft 10, the third gasket 13, the grinding wheel 12 and the flange plate 11 are locked on the main shaft 10, and finally the locking handle 7 is locked.

The polishing wheel 5 and the gear ring are integrally designed, so that the polishing wheel is simple to assemble and high in transmission efficiency; the main shaft 10 and the polishing wheel 5 realize transmission through the flat key 9, and have the advantages of large shearing force bearing capacity, high stability and long service life.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. The polishing wheel is characterized by comprising a side surface and a rim, wherein a gear ring is arranged in a space formed by the side surface and the rim, and the center of the gear ring is provided with a shaft hole.

2. The polishing wheel according to claim 1, wherein a plurality of ribs are provided between the ring gear and the shaft hole.

3. The polishing wheel of claim 1, wherein the shaft hole is provided with a key notch.

4. The polishing wheel of claim 1, wherein the polishing wheel, the ring gear, and the shaft aperture are of unitary construction.

5. The knife sharpener of any one of the preceding claims mounted thereon, comprising a motor shaft, a spindle and a polishing wheel, characterized in that: the shaft end of the motor is connected with a driving gear, and the driving gear is meshed with the gear ring.

6. The tool sharpener of claim 5, characterized in that: the spindle is provided with a key groove for mounting the flat key, and a notch matched with the flat key is formed in the shaft hole.

7. The tool sharpener of claim 5, characterized in that: the polishing wheel is made of reinforced PP (polypropylene), and the driving gear is made of oil-containing nylon.