CN214616539U - Fishtail knife with novel structure - Google Patents

Abstract

The utility model provides a novel structure fishtail sword, which comprises a base, the top of base is provided with a plurality of tool bits along its length direction interval distribution, and the side of the cutting portion of major part is provided with the dismouting hole that is used for the dismouting tool bit, and the bottom both sides of cutting portion are provided with the ladder shoulder, and the ladder shoulder cooperates with the countersunk groove that sets up at the base top, and the bottom in countersunk groove is provided with the mounting groove that is used for installing the tool bit, and the inner wall of mounting groove is provided with the jump ring subassembly, and the jump ring subassembly cover is established in the outside of tool bit connecting portion and its bottom and the spacing shoulder butt of setting on connecting portion, the bottom of connecting portion is provided with the sphere groove. This device has higher high-speed joint ability, has reduced the work load that the change tool bit needs to be accomplished, has reduced the change degree of difficulty and replacement cost, and the radiating effect is better with the damping effect, and the actual life of tool bit is longer moreover. The utility model relates to a rationally, simple structure is fit for extensive the popularization.

Description

Fishtail knife with novel structure

Technical Field

The utility model belongs to the technical field of the shield constructs the cutter, especially, relate to a novel structure fishtail sword.

Background

Shield tunneling equipment is increasingly widely used in underground engineering construction such as subway construction, rail transit construction and coal mine tunnel construction. The central fishtail cutter is mainly suitable for the stratum with the hardness below the medium, when the shield cutter head is used for tunneling, the linear speed of the cutter is low due to the central position of the cutter head, the front cutting cutter can not be arranged, the central hob can not be installed, and the cutting and stirring effect of the soil body at the central part can be better improved by installing the central fishtail cutter. The existing fishtail cutter is integrally formed by brazing and then is fixed with the cutter head by welding. The design and the working principle of the central fishtail cutter are that the shape design of the central fishtail cutter can lead the central fishtail cutter to cut the central part of the soil mass in advance, lead the central part to form the soil mass with a small circular section and then enlarge the soil mass to the full-section cutting; the conical root design of the central fishtail cutter can enable the soil body cut by the central fishtail cutter to increase a turning motion on the basis of tangential and radial motions when the cutter head rotates, so that the cutting problem of the soil body at the central part can be solved, the mobility and the stirring effect of the cut soil body are improved, and the whole tunneling effect of the shield is greatly improved.

Because the central fishtail knife is positioned at the central position of the cutter head, the linear speed is low, the cutting distance is short, the position of the conical blade part is seriously abraded, and the rest positions are not easy to damage. The tapered edge part is the main cutting part of the fishtail cutter, and the whole fishtail cutter adopts an integrated continuous form, so that if the cutter is worn for a certain amount, the fishtail cutter needs to be integrally replaced. The whole fishtail cutter needs to be planed, the workload is large, and the waste is serious.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem that foretell center fishtail sword exists in the aspect of changing, provide a reasonable in design, simple structure, be convenient for change and be favorable to reduce cost's a novel structure fishtail sword.

In order to achieve the purpose, the utility model discloses a technical scheme do, the utility model provides a pair of novel structure fishtail sword, including base and tool bit, the tool bit includes cutting portion and connecting portion, the top of base is provided with a plurality of tool bits along its length direction interval distribution, the side of cutting portion is provided with the dismouting hole that is used for the dismouting tool bit, the bottom both sides of cutting portion are provided with the ladder shoulder, the ladder shoulder cooperates with the countersunk groove that sets up at the base top, the bottom in countersunk groove is provided with the mounting groove that is used for installing the tool bit, the inner wall of mounting groove is provided with the jump ring subassembly, the jump ring subassembly is used for coming up the connecting portion joint in the mounting groove, the jump ring subassembly cover is established in the outside of connecting portion and its bottom and the spacing shoulder butt of setting on connecting portion, the bottom of connecting portion is provided with the sphere groove.

As preferred, the jump ring subassembly includes that a plurality of jump rings of connecting from top to bottom are right, the jump ring is right including the last jump ring and the lower jump ring of transversal personally submitting C font, go up and be provided with curved first connection piece between the bottom surface of jump ring and the top surface of jump ring down, adjacent jump ring is to connecting through curved second connection piece, it is opposite with the opening opposite direction of jump ring down to go up the jump ring, the tip of going up the jump ring is provided with towards its central direction convex last joint head, the tip of jump ring is provided with towards its central direction convex lower joint head down, the side of connecting portion be provided with last joint head and lower joint head complex butt plane.

Preferably, the contact plane is provided with a plurality of heat dissipation holes which are uniformly distributed.

Preferably, the top center of the cutter head is provided with a plurality of tear-resistant heads.

Preferably, a pair of positioning grooves is arranged on the side surface of the dismounting hole.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

1. the utility model provides a fishtail knife with a novel structure, the base adopts a form that a plurality of knife heads are distributed at intervals, and in addition, the two are quickly connected by adopting a snap spring component, so that the workload required to be completed by replacing the knife heads can be reduced, and the replacement difficulty and the replacement cost are reduced; meanwhile, the dismounting hole can provide a connecting fulcrum for tools used for dismounting the cutter head so as to finish dismounting; and the structure of dismouting hole and sphere groove can improve the radiating effect and the shock attenuation effect of tool bit, is favorable to prolonging the actual life of tool bit. The utility model relates to a rationally, simple structure is fit for extensive the popularization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a sectional view of a fishtail knife with a novel structure provided by an embodiment;

FIG. 2 is a sectional view of the fishtail knife with a novel structure provided by the embodiment in another direction;

FIG. 3 is a front view of the fishtail knife with a novel structure provided by the embodiment;

FIG. 4 is an isometric view of a fishtail (without a circlip assembly) with a novel structure provided by the embodiment;

fig. 5 is a schematic structural diagram of a clamp spring pair provided in the embodiment;

in the above figures, 1, a base; 11. a countersunk groove; 12. mounting grooves; 2. a cutter head; 21. a cutting portion; 22. a connecting portion; 23. disassembling and assembling holes; 24. a step shoulder; 25. an abutment plane; 26. a spherical groove; 27. heat dissipation holes; 28. positioning a groove; 29. a limiting shoulder; 3. a clamp spring assembly; 31. a clamp spring pair; 311. mounting a clamp spring; 312. a lower clamp spring; 313. a clamping joint is arranged; 314. a lower clamp joint; 32. a first connecting piece; 4. a tear resistant head.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" used herein refer to the same directions as the drawings, and do not limit the structure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Embodiment, as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the utility model provides a novel structure fishtail knife, including base 1 and tool bit 2, tool bit 2 includes cutting portion 21 and connecting portion 22. Wherein, the section shape of the cutter head 2 still presents a fishtail shape. The utility model discloses a change the integrative continuous form of tool bit in the past, be provided with a plurality of tool bits 2 along its length direction interval distribution at the top of base 1 promptly, and simultaneously, the side of cutting portion 21 is provided with the dismouting hole 23 that is used for the dismouting tool bit, the bottom both sides of cutting portion 21 are provided with ladder shoulder 24, ladder shoulder 24 cooperates with the countersunk head groove 11 that sets up at the base top, the bottom of countersunk head groove 11 is provided with the mounting groove 12 that is used for installing the tool bit, the inner wall of mounting groove 12 is provided with jump ring subassembly 3, jump ring subassembly 3 cover is established in the outside of connecting portion 22 and its bottom and the spacing shoulder 29 butt that sets up on connecting portion 22. In the device, the base 1 is provided with a plurality of cutter heads which are distributed at intervals, and the cutter heads and the clamp spring assembly 3 are quickly connected, so that the workload required by replacing the cutter heads can be reduced, and the replacement difficulty and the replacement cost are reduced; meanwhile, the dismounting hole 23 can provide a connection pivot for tools used for dismounting the tool bit, so that a worker or a manipulator can conveniently separate the tool bit from the clamp spring assembly by inserting the dismounting tool into the dismounting hole.

As shown in fig. 1 and 5, consider the operational environment characteristics of shield cutter, in order to improve jump ring subassembly 3's joint performance, the utility model provides a jump ring subassembly 3 includes a plurality of jump rings of connecting from top to bottom to 31, jump ring pair 31 includes transversal last jump ring 311 and the lower jump ring 312 of personally submitting the C font, be provided with curved first connecting piece 32 between the bottom surface of going up jump ring 311 and the top surface of lower jump ring 312, adjacent jump ring is connected through curved second connecting piece to 31, it is opposite with the opening opposite direction of lower jump ring 312 to go up jump ring 311, the tip of going up jump ring 311 is provided with towards its central direction convex last joint 313, the tip of lower jump ring 312 is provided with towards its central direction convex lower joint 314, the side of connecting portion 22 is provided with last joint 313 and lower joint 314 complex butt plane 25, the bottom of connecting portion 22 is provided with spherical groove 26. In the present device, two clamp springs in the same clamp spring pair 31 can be correspondingly expanded while being inserted into the connecting portion, until the connecting portion 22 is completely inserted into the mounting groove 12, all the upper clamp connectors 313 and the lower clamp connectors 314 are clamped on the abutting plane 25, so as to achieve the purpose of quick clamping. Wherein, the ladder shoulder 24 can play the effect of preventing changeing with heavy groove 11 cooperation back to guarantee the stability of being connected of tool bit on the base. The clamp spring pair 31 and the connecting part can be clamped efficiently by adopting the clamp springs with two clamping directions, and the first connecting piece 32 can provide a reasonable elastic gap for the upper clamp spring 311 and the lower clamp spring 312 so as to compensate a vibration gap generated by the clamp spring pair 31 in the whole cutter working process; meanwhile, the probability that the cutter head is passively separated from the base can be reduced by adopting the plurality of clamp spring pairs 31, and particularly, the second connecting piece is arranged to serve as a buffer structure of the adjacent clamp spring pair 31, so that the connection reliability of the cutter head 2 in the base 1 can be ensured, and the cutting performance of the device applied to the cutter head is fully improved. Furthermore, the design that the disassembly and assembly holes 23, the heat dissipation holes 27 and the spherical grooves 26 are communicated can effectively improve the heat dissipation effect of the cutter head, and is beneficial to prolonging the actual service life of the cutter head.

As shown in fig. 2, in order to improve the heat dispersion of tool bit, the utility model discloses be provided with a plurality of evenly distributed's louvre 27 on butt plane 25, and louvre 27 can make tool bit and base produced vibration heat and friction heat pass through louvre 27 and dismouting hole 23 and obtain reasonable release, and the outside transmission of heat accelerates, still plays the effect of damping to a certain extent moreover, and then prolongs the actual life of tool bit.

In order to prolong the actual life of tool bit 2, the utility model discloses be provided with a plurality of anti tear heads 4 at the top center of tool bit 2, utilize anti tear head 4 effectively to strengthen the tearing resistance at fishtail tool bit center.

As shown in fig. 4, in order to facilitate the dismouting tool bit 2, the utility model discloses be provided with a pair of constant head tank 28 in the side of dismouting hole 23, constant head tank 28 can cooperate with assembly and disassembly tools's partial structure, forms effectual atress fulcrum to guarantee assembly and disassembly tools and tool bit support node's stability, reduce the degree of difficulty of dismouting tool bit.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims (5)

1. The utility model provides a novel structure fishtail sword, includes base and tool bit, the tool bit includes cutting part and connecting portion, its characterized in that, the top of base is provided with a plurality of tool bits along its length direction interval distribution, the side of cutting part is provided with the dismouting hole that is used for the dismouting tool bit, the bottom both sides of cutting part are provided with the ladder shoulder, the ladder shoulder cooperates with the countersunk head groove that sets up at the base top, the bottom in countersunk head groove is provided with the mounting groove that is used for installing the tool bit, the inner wall of mounting groove is provided with the jump ring subassembly, the jump ring subassembly is used for coming connecting portion joint in the mounting groove, the jump ring subassembly cover is established in the outside of connecting portion and its bottom and the spacing shoulder butt of setting on connecting portion, the bottom of connecting portion is provided with the spherical surface groove.

2. The fishtail knife with the novel structure as claimed in claim 1, wherein the clamp spring assembly comprises a plurality of clamp spring pairs which are connected up and down, each clamp spring pair comprises an upper clamp spring and a lower clamp spring which are C-shaped in cross section, an arc-shaped first connecting piece is arranged between the bottom surface of each upper clamp spring and the top surface of each lower clamp spring, adjacent clamp spring pairs are connected through arc-shaped second connecting pieces, the opening directions of the upper clamp springs and the lower clamp springs are opposite, an upper clamp connector protruding towards the central direction of the upper clamp springs is arranged at the end portions of the upper clamp springs, a lower clamp connector protruding towards the central direction of the lower clamp springs is arranged at the end portions of the lower clamp springs, and abutting planes matched with the upper clamp connector and the lower clamp connector are arranged on the side surfaces of the connecting portions.

3. The fishtail knife of claim 2 in which the abutting surface has a plurality of evenly distributed heat dissipation holes.

4. The fishtail knife of claim 3 in which the top center of the knife head is provided with a plurality of tear resistant heads.

5. The fishtail knife of claim 4 in which the holes are provided with a pair of locating grooves on the sides.

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