CN210308016U - Conical cylinder-shaped cutter, vegetable cutting mechanism and drum-type vegetable cutter - Google Patents

Abstract

The utility model discloses a cone-shaped cutter, a vegetable cutting mechanism and a drum-type vegetable cutter, which comprises a cone-shaped cutter body, a connecting part and a fixing ring, wherein the outer surface of the cone-shaped cutter body is provided with a plurality of cutting edges, the connecting part comprises a bottom plate which seals the small-caliber end surface of the cone-shaped cutter body and a connecting head which is arranged outside the bottom plate and is connected with a rocking handle component, and the fixing ring is arranged on the large-caliber annular end part of the cone-shaped cutter body; the small-caliber end of the conical cutter body is fixed by a bottom plate, and the large-caliber end of the conical cutter body is fixed by a fixing ring, so that the conical cutter is reliable in structure and not easy to deform; the outer surface of the fixing ring is higher than the outer surface of the cone-shaped cutter body, the outer surface of the fixing ring of the cone-shaped cutter is tightly attached to the inner wall of the cutter placing cylinder, and an annular gap is formed between the outer surface of the cone-shaped cutter and the inner wall of the cutter placing cylinder, so that the cone-shaped cutter can rotate in the cutter placing cylinder.

Description

Conical cylinder-shaped cutter, vegetable cutting mechanism and drum-type vegetable cutter

Technical Field

The utility model relates to a kitchen supplies field especially relates to a awl cylindric cutter, mechanism and drum-type shredder of cutting dish.

Background

The shredder is a common kitchen article, can avoid the injury risk caused by cutting vegetables with a cutter and improve the efficiency of cutting vegetables.

The structure and the form of the shredder are various; such as a shredder with publication number CN 109465880A; a household shredder with publication number CN 109772534A.

A roller shredder, such as the CN109262726A multifunctional shredder, is a roller shredder, i.e. a roller cutter is arranged in a shredding chamber, and the roller cutter is installed and connected with a rotating handle through a detaching mechanism. A mechanical roller shredder of publication No. CN 205129972U. Utility model people when realizing above-mentioned utility model, have following technical problem at least: the roller cutter has the problems of insufficient strength, easy deformation and the like due to the limitations of materials, structures and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a awl cylindric cutter convenient to improve intensity is provided, further provides the mechanism of cutting the dish and drum-type shredder that have above-mentioned awl cylindric cutter.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the conical cutter comprises a conical cutter body, a connecting part and a fixing ring, wherein the outer surface of the conical cutter body is provided with a plurality of cutting edges, and the connecting part comprises a bottom plate for sealing the small-caliber end surface of the conical cutter body and a connecting head arranged on the outer side of the bottom plate and connected with a rocking handle assembly; the fixing ring is arranged on the large-caliber annular end part of the conical cutter body, and the outer surface of the fixing ring is higher than that of the conical cutter body.

The utility model discloses a further optimization scheme does: the cone-shaped cutter body is formed by rolling a metal sheet stamped with a cutting edge; the conical cutter body is provided with a splicing seam, and the conical cutter body is shaped by the fixing ring.

The utility model discloses a further optimization scheme does: the connecting part and the fixing ring are integrally formed on the metal conical cutter body through an injection molding process.

The utility model discloses a further optimization scheme does: the coupling head is a cylindrical part with a cavity, and the peripheral side wall of the cylindrical part is provided with at least one through hole communicated with the cavity; the cylindrical part is used for being inserted into the mounting hole of the rocking handle assembly, and the through hole is used for inserting a push rod of the rocking handle assembly.

The utility model discloses a further optimization scheme does: the cross section of the cylindrical part is square, and the four side walls of the cylindrical part are respectively provided with one through hole.

The utility model discloses a further optimization scheme does: the taper of the conical cutter body is 5-10 degrees.

The utility model discloses a further optimization scheme does: the blade of the cone-shaped cutter body is a round hole type blade or a strip-shaped blade.

The utility model discloses another theme does: the vegetable cutting mechanism comprises a cutter placing cylinder with a conical cylinder-shaped inner cavity and a conical cylinder-shaped cutter positioned in the conical cylinder-shaped inner cavity.

The utility model discloses a further optimization scheme does: the outer surface of the fixing ring of the vegetable cutting mechanism is closely attached to the inner wall of the knife placing cylinder in a rotatable manner, and an annular gap is formed between the outer surface of the conical cutter body and the inner wall of the knife placing cylinder, so that the conical cutter can rotate in the knife placing cylinder.

The utility model discloses another theme does: the roller type shredder comprises the shredding mechanism and a base, wherein the knife placing cylinder is detachably connected with the base.

Compared with the prior art, the utility model has the advantages that the small-bore end of awl wound-rotor type cutter body is fixed with the bottom plate, and the big-bore end of awl wound-rotor type cutter body is fixed with solid fixed ring, makes the structure of awl wound-rotor type cutter more reliable, and non-deformable. The outer surface of the fixing ring of the conical cutter is tightly attached to the inner wall of the cutter placing cylinder, and an annular gap is formed between the outer surface of the conical cutter and the inner wall of the cutter placing cylinder, so that the conical cutter can rotate in the cutter placing cylinder.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be taken as limiting the scope of the present invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

Fig. 1 is a first perspective view of a preferred embodiment of the present invention;

fig. 2 is a schematic perspective view of a second preferred embodiment of the present invention;

fig. 3 is a third schematic perspective view of a preferred embodiment of the present invention;

fig. 4 is an exploded view of a preferred embodiment of the present invention;

FIG. 5 is a second exploded view of a preferred embodiment of the present invention;

fig. 6 is a partial first fuselage schematic view of a preferred embodiment of the present invention;

FIG. 7 is a second partial fuselage diagram of a preferred embodiment of the present invention;

fig. 8 is a partial fuselage view of a preferred embodiment of the present invention;

FIG. 9 is a cross-sectional view of a portion of the fuselage of a preferred embodiment of the present invention;

FIG. 10 is an exploded view of a partial fuselage of a preferred embodiment of the present invention;

fig. 11 is a first schematic view of a knife placing cylinder according to a preferred embodiment of the present invention;

fig. 12 is a second schematic view of a knife placing cylinder according to a preferred embodiment of the present invention;

fig. 13 is a third schematic view of a knife placing cylinder according to a preferred embodiment of the present invention;

fig. 14 is a perspective view of a conical cylinder cutter according to a preferred embodiment of the present invention;

fig. 15 is an exploded view of a conical cylinder cutter in accordance with a preferred embodiment of the present invention;

FIG. 16 is a schematic view of a connection structure of a conical cylinder-shaped cutter and a rocking handle assembly according to a preferred embodiment of the present invention;

fig. 17 is a schematic view of the coupling portion of the conical cylindrical cutter according to a preferred embodiment of the present invention;

FIG. 18 is a schematic view of a rocking handle assembly of a preferred embodiment of the present invention;

FIG. 19 is a schematic view of a mounting portion of a rocking handle assembly according to a preferred embodiment of the present invention;

fig. 20 is a first schematic view of a detachable coupling structure of the vegetable cutter body and the base according to a preferred embodiment of the present invention;

fig. 21 is a second schematic view of a detachable coupling structure of the vegetable cutter body and the base according to a preferred embodiment of the present invention;

fig. 22 is an enlarged view of the detachable coupling structure of the body and the base of the vegetable cutter according to a preferred embodiment of the present invention;

fig. 23 is a schematic view of a locking pin according to a preferred embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the invention.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements, mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The hand-operated vegetable cutter shown in fig. 1-5 sequentially comprises a base 01 and a machine body 02 with a vegetable cutting mechanism from bottom to top. Wherein the vegetable cutting mechanism comprises a knife placing cylinder 1, a conical cylinder-shaped cutter 2 and a rocking handle component 3.

As shown in fig. 5 to 10, the knife cylinder 1 is a component having a conical cylinder shaped inner cavity 101, and the outer contour thereof is a chamfered frustum which is consistent with the taper of the conical cylinder shaped inner cavity 101. One side of the knife placing cylinder 1 is open and is provided with a discharge hole 102, and the other side is connected with the rocking handle component 3.

The conical cylinder-shaped cutter is sleeved in the cutter cylinder 1, an annular gap is formed between the conical cylinder-shaped inner cavity 101 and the conical cylinder-shaped cutter 2, the rocking handle component 3 is detachably connected with the conical cylinder-shaped cutter 2, the rocking handle component 3 drives the conical cylinder-shaped cutter 2 to rotate in the conical cylinder-shaped inner cavity 101 of the cutter cylinder 1, and then fruits and vegetables in the cutter cylinder 1 are cut into pieces or strips with uniform sizes, so that the vegetable cutting efficiency is improved.

As shown in fig. 11, the upper edges of the knife cylinder 1 and the conical cylinder cavity 101 are distributed in a horizontal direction, the lower edges are arranged obliquely downward toward the discharge port 102, the angle of inclination is a, and the cross section of the open end is inclined downward to form the discharge port 102 at the lower part. Preferably, the inclined angle b of the front end of the discharge port 102 is larger than the inclined angle a of the lower edge of the outer contour of the knife cylinder 1, so that a bell mouth-like shape is formed, cut fruits and vegetables can naturally flow out of the discharge port 102, a user can collect the cut vegetables more easily, and the vegetable cutting operation is more convenient.

Preferably, the taper of the conical cylindrical cavity 101 is 5-10 °, more preferably 6.5 °, so that the inclination angle a of the lower edge of the conical cylindrical cavity 101 (i.e. the inclination angle a of the lower edge of the outer contour of the knife holder 1) is 10-20 °, more preferably 13 °.

As shown in fig. 5 and 12, one end of the knife cylinder 1 connected with the rocking handle assembly 3 is provided with a circular connecting hole 103, the connecting hole 103 is the same as the conical cylinder shaped inner cavity 101, an annular positioning part 104 extends outwards from the outer periphery of the hole, and the rocking handle assembly 3 is rotatably connected with the annular positioning part 104.

As shown in fig. 5-10 and 13, a feeding portion 105 is disposed above the knife cylinder 1, and has a hollow square column structure, and is communicated with the knife cylinder 1, and a feeding port 106 is formed at the joint, and the feeding port 106 is communicated with the conical cylinder cavity 101. The setting of feed portion 105 has not only played the guide effect to the fruit vegetables feeding, has provided the fixed position of fruit vegetables cutting, but also the effectual both hands of separation user and the direct contact of cutting edge, has guaranteed user's safety.

As shown in fig. 5-10 and 12, a connecting seat 4 for connecting with the base 01 is arranged below the knife cylinder 1, so that the knife cylinder 1 can be detachably arranged on the base 01, thereby facilitating the cleaning work of a user after use and improving the food sanitation.

The feeding part 105, the knife placing cylinder 1 and the connecting seat 4 can be integrally formed or can be in a split structure, the feeding part, the knife placing cylinder and the connecting seat are preferably integrally formed by plastic in an injection molding mode in the embodiment, and the whole structure is transparent, so that the structure is simplified, the cost is reduced, and the states of the cut fruits and vegetables in the whole process of feeding, cutting and discharging can be clearly observed.

As shown in fig. 9 and 10, a conical cutter 2 is disposed in the cutter cylinder 1, the conical cutter 2 and the conical cavity 101 of the cutter cylinder 1 are matched with each other, and the tapers of the two are the same, that is, the upper cutting edge 201 of the conical cutter 2 at the material inlet 106 is distributed in the horizontal direction, and the lower cutting edge 202 of the conical cutter 2 is inclined downward toward the material outlet 102. The upper edge 201 of the conical cylindrical cutter 2 is a generatrix at the uppermost end of the outer side surface of the conical cylinder, and the lower edge 202 is a generatrix at the lowermost end of the outer side surface of the conical cylinder in the same manner.

As shown in fig. 14, 15, the conical cylindrical cutter 2 includes a fixed ring 21, a conical cylindrical cutter body 22, and a coupling portion 23; the coupling portion 23 includes a bottom plate 203 that closes the small-diameter end face of the conical cylindrical tool 2 and a coupling head 204 that is provided outside the bottom plate 203; the fixing ring 21 is provided on the large-diameter annular end portion of the conical cylindrical cutter body 22, and the outer surface 210 of the fixing ring 21 is higher than the outer surface 220 of the conical cylindrical cutter body 22.

As one preferable form of the conical cylindrical cutter body 22, the conical cylindrical cutter body 22 is formed by rolling a metal sheet punched with the blade 205; the cone-shaped cutter body 22 is provided with a splicing seam, and the cone-shaped cutter body 22 is shaped by the fixing ring 21. The coupling portion 23 and the fixing ring 21 are integrally formed on the metal conical cutter body 22 by an injection molding process.

The conical cutter body 22 is provided with a cutting edge 205, and the cutting edge 205 is distributed on the rotating side surface of the conical cutter body 22 and faces outwards. The blades 205 may be round-hole blades evenly distributed along the rotating side surface array, or may be strip-shaped blades. And the rotating conical cutter body 22 always has a part of the cutting edge 205 positioned at the feeding port 106.

As shown in fig. 9 and 14, the size of the fixing ring 21 is matched with the cross section of the conical inner cavity 101 where the fixing ring is located, so that the outer surface of the fixing ring 21 and the inner wall of the knife cylinder 1 can be rotationally attached together, the conical cutter 2 and the knife cylinder 1 are radially positioned, and the cutting instability caused by the shaking of the conical cutter 2 is avoided.

As shown in fig. 1-15, the coupling head 204 passes through the connecting hole 103 at one end of the knife cylinder 1 to be connected with the rocking handle assembly 3.

As shown in fig. 16, the rocking handle assembly 3 includes a mounting portion 31 connected to a coupling head 204, a rocking arm 32 and a handle 33. The mounting portion 31 is located at the end of the swing arm 32, the handle 33 is at an angle of approximately 90 ° to the swing arm 32, and the handle 33 is designed to be suitable for a user to hold the handle 33 for a long time to rotate, so that the handle assembly 3 can be manually driven easily and easily.

In order to facilitate the cleaning of the conical cylindrical cutter 2, the conical cylindrical cutter 2 is detachably arranged on the cutter placing barrel 1, and the detachability of the conical cylindrical cutter 2 is realized through the detachable connection between the connecting head 204 and the rocking handle component 3. The coupling head 204 and the rocking handle assembly 3 can be connected through screw threads or through a push rod structure.

As shown in fig. 1-5 and 17-19, as a preferable structure of the connection structure between the conical cylinder-shaped cutter 2 and the rocking handle assembly 3, in the present embodiment, the coupling head 204 is connected with the rocking handle assembly 3 through a push rod. Specifically, the front section of the coupling head 204 is a coupling round table 024 matched with an inner hole of the annular positioning part 104 of the knife cylinder 1, the rear end is a cylindrical part 025 with a square cross section and a cavity, and four side walls of the cylindrical part 025 are respectively provided with a through hole 303 communicated with the cavity.

Correspondingly, the mounting part 31 of the rocking handle assembly 3 is a cavity which can accommodate the annular positioning part 104, a square mounting hole 301 which is matched with the cylindrical part 025 is arranged in the middle of the cavity, and the cylindrical part 025 is inserted into the mounting hole 301 and is radially fixed through a push rod structure. At this time, the outer end of the mounting hole 301 abuts against the end face of the annular positioning portion 104, and the bottom plate 203 of the conical cutter 2 abuts against the inner wall of the cutter placing cylinder 1, so that the conical cutter 2 and the cutter placing cylinder 1 are axially fixed.

A tongue-shaped push rod 302 is arranged below the inner wall of the mounting hole 301, and a compression spring is arranged below the tongue-shaped push rod 302 and is connected with a button assembled on the rocker 32. The compression spring can be compressed and deformed by pressing the button, and the tongue-shaped push rod 302 retracts and does not protrude out of the inner wall of the mounting hole 301; when the button is released, the compression spring is reset, and the tongue-shaped push rod 302 is ejected and inserted into the through hole 303 of the cylindrical part 025, so that the conical cylindrical cutter 2 is fixed with the rocking handle assembly 3. The square cylindrical part 025 and the mounting hole 301 enable the through hole 303 and the tongue-shaped push rod 302 to be positioned more quickly and conveniently, and meanwhile, the through holes 303 are formed in four sides, so that the conical cylindrical cutter 2 can be assembled with the rocking handle assembly 3 in four directions, and a user can conveniently and quickly reassemble the cutter after cleaning.

The detachable coupling of the body 02 of the vegetable cutter to the base 01 will be described in detail below with reference to fig. 1-5 and 20-23.

The connecting seat 4 below the knife cylinder 1 of the machine body 02 is a convex block with a convex section, and the base of the connecting seat is a rectangle horizontally arranged. The coupling seat 4 is hollow inside, so that the whole body 02 is lighter. The bottom of the front end of the connecting seat 4 is provided with a locking groove 41 with a downward opening, the inner side of the locking groove 41 is connected with the lower edge of the cutter placing cylinder 1 by a reinforcing rib 42, and the structural rigidity is enhanced.

The upper surface of base 01 is the arc concave surface 5 anastomotic with putting a knife section of thick bamboo 1, the upper end is equipped with the recess 6 that the opening is up, recess 6 and hookup seat 4 phase-match, the preceding terminal surface of recess 6 extends to the front surface of base 01 makes the front surface of base 01 have a breach 61, hookup seat 4 inserts to the recess 6 of base 01 from the breach 61 of base 01 with horizontal direction lateral shifting, be equipped with horizontal spacing muscle 7 in the recess 6, horizontal spacing muscle 7 is located the base both sides top of hookup seat 4, restriction hookup seat 4 upwards breaks away from in recess 6.

The detachable connection structure of the body 02 and the base 01 further comprises a locking assembly arranged on the base 01, wherein the locking assembly comprises a movable locking pin 8, the locking pin 8 can move up and down, and can extend from the base 01 to be inserted into the locking groove 41 of the connection seat 4 so as to limit the lateral movement of the connection seat 4 relative to the groove 6. In the first state, the lock pin 8 limits the coupling seat 4 from moving out of the groove 6; in the second state, the locking pin 8 unlocks the coupling seat 4 and allows the coupling seat 4 to be removed from the recess 6.

The locking assembly further comprises an elastic piece, the elastic piece drives the lock pin 8 to partially extend out of the bottom of the groove 6 and is in a first state; when an external force is applied to the elastic member, the external force overcomes the elastic force of the elastic member and causes the latch 8 to be in the retracted state, i.e., the second state.

The locking pin 8 comprises a locking tongue 81 with a bevel 801, the bevel 801 being inclined inwards from bottom to top so as to meet the direction of transverse insertion of the coupling seat 4 into the recess 6.

When the coupling seat 4 is transversely inserted into the groove 6, the bolt 81 can be compressed to a retracted state; and the latch tongue 81 can extend into the lock groove 41 under the action of the elastic member.

The outer surface of the base 01 is provided with a first control switch 10 which is coupled to the latch 8 and can slide up and down. The first control switch 10 is slid downwards, the lock pin 8 moves downwards, the elastic piece is compressed, the lock tongue 81 retracts and is not clamped in the lock groove 41, the detachable connecting structure is in a second state, and the knife holder 1 can slide out of the base 01; when the first control switch 10 is loosened, the elastic element is compressed, the bolt 81 protrudes out of the bottom of the groove 6 of the base 01, when the coupling seat 4 of the cleaned knife cylinder 1 is transversely inserted into the groove 6, the inclined surface 801 of the bolt 81 meets the insertion direction, when the bottom obstacle of the coupling seat 4 is met, the bolt 81 can be compressed, after the bolt 81 is installed in place, the bolt 81 is in a pop-up state and is clamped in the locking groove 41 of the coupling seat 4, and the detachable coupling structure is in a first state.

For making at the in-process of cutting the dish, it is more stable to fix between base 01 and the operation panel, need not the hand vegetable-chopper of user, and the operation of cutting the dish becomes more laborsaving safety, and base 01 wholly is a terrace with edge in this embodiment, sets up a sucking disc 05 that can adsorb at the workstation. Specifically, the base 01 is a hollow structure, the bottom of the base 01 is provided with a sucker 05 which is larger than the bottom area of the base 01, an operating mechanism for controlling the sucker 05 is arranged in the inner cavity of the base 01, and the operating mechanism for controlling the sucker 05 is connected with a second control switch 06 arranged on the outer surface of the base 01. When the second control switch 06 is turned off, the middle part of the sucking disc 05 forms vacuum and is adsorbed on the operation table, thereby improving the use safety of the utility model; when the second control switch 06 is turned on, the vacuum is eliminated in the middle of the sucker 05, and the sucker 05 is separated from the operating table, so that the vegetable cutter can be shifted and taken conveniently.

It is right above the utility model provides a awl cylindric cutter, mechanism and drum-type shredder of cutting dish have carried out detailed introduction, and it is right to have used specific individual example herein the utility model discloses a principle and implementation mode have been elucidated, and the description of above embodiment is only used for helping understanding the utility model discloses and core thought. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The conical cutter is characterized by comprising a conical cutter body, a connecting part and a fixing ring, wherein the outer surface of the conical cutter body is provided with a plurality of cutting edges, and the connecting part comprises a bottom plate for sealing the small-caliber end surface of the conical cutter body and a connecting head arranged on the outer side of the bottom plate and connected with a rocking handle assembly; the fixing ring is arranged on the large-caliber annular end part of the conical cutter body, and the outer surface of the fixing ring is higher than that of the conical cutter body.

2. The cone and cylinder type cutter according to claim 1, wherein the cone and cylinder type cutter body is formed by rolling a metal sheet punched with a blade; the conical cutter body is provided with a splicing seam, and the conical cutter body is shaped by the fixing ring.

3. The cone and cylinder type cutter according to claim 1, wherein the coupling portion and the fixing ring are integrally formed on the cone and cylinder type cutter body made of metal by an injection molding process.

4. The cone and cylinder type cutter according to claim 1, wherein said coupling head is a cylinder having a cavity, and the peripheral side wall of said cylinder is provided with at least one through hole communicating with said cavity; the cylindrical part is used for being inserted into the mounting hole of the rocking handle assembly, and the through hole is used for inserting a push rod of the rocking handle assembly.

5. The tapered cylinder cutting tool according to claim 4, wherein said cylindrical portion has a square cross-section, and four side walls of said cylindrical portion are provided with one of said through holes, respectively.

6. The cone and barrel type cutter according to claim 1, wherein the taper of said cone and barrel type cutter body is 5-10 degrees.

7. The tapered cylindrical cutting tool according to claim 1, wherein the cutting edge of the tapered cylindrical cutting tool body is a circular hole type cutting edge or an elongated cutting edge.

8. The vegetable cutting mechanism is characterized by comprising a cutter placing cylinder with a conical cylinder-shaped inner cavity and a conical cylinder-shaped cutter according to any one of claims 1 to 7, wherein the conical cylinder-shaped cutter is positioned in the conical cylinder-shaped inner cavity.

9. The vegetable cutting mechanism as claimed in claim 8, wherein the outer surface of the fixing ring is rotatably fitted to the inner wall of the knife cylinder, and the outer surface of the cone-shaped knife body has an annular gap with the inner wall of the knife cylinder, so that the cone-shaped knife can rotate in the knife cylinder.

10. The roller type shredder is characterized by comprising the vegetable cutting mechanism and a base as claimed in claim 8, wherein the knife placing cylinder is detachably connected with the base.

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