阅读说明：本技术 一种挖泥绞吸船的铰刀头连接机构 (Reamer head connecting mechanism of dredging cutter suction ship ) 是由 刘和明 杨嵩 钱梵梵 鲁磊 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种挖泥绞吸船的铰刀头连接机构,涉及挖掘设备技术领域,包括螺柱以及用于与铰刀叶片连接固定的基座,所述基座上开设有与螺柱相螺接的螺孔,所述螺孔内设有分力机构,所述分力机构包括有：传力组件,其包括位于所述基座内的压缩状态以及连接所述基座和所述螺柱的伸展状态；触发组件,其连接于所述螺孔的底部,所述触发组件接收所述螺柱的挤压以使得所述传力组件从所述压缩状态进入所述伸展状态,本发明通过分力机构来分担了且转移了螺孔与螺柱之间的挤压力,有利于避免螺柱上以及铰刀头上相适配的螺孔的螺旋线挤压力过大变形而无法拆除的情况。(The invention discloses a reamer head connecting mechanism of a dredging cutter suction ship, which relates to the technical field of excavating equipment and comprises a stud and a base used for being connected and fixed with a reamer blade, wherein the base is provided with a screw hole in threaded connection with the stud, a component force mechanism is arranged in the screw hole, and the component force mechanism comprises: a force transfer assembly including a compressed state within the base and an extended state connecting the base and the stud; the force transmission assembly is connected to the bottom of the screw hole and used for receiving the extrusion of the stud so as to enable the force transmission assembly to enter the extension state from the compression state.)

1. The utility model provides a dredge cutter head coupling mechanism who inhales ship, includes double-screw bolt (1) and is used for being connected fixed base (2) with the reamer blade, set up screw (3) with double-screw bolt (1) looks spiro union on base (2), its characterized in that, be equipped with component mechanism (4) in screw (3), component mechanism (4) are including:

a force transfer assembly (5) comprising a compressed state within the base (2) and an extended state connecting the base and the stud (2);

a trigger assembly (6) connected to the bottom of the threaded bore (3), the trigger assembly (6) receiving compression of the stud (1) to bring the force transfer assembly (5) from the compressed state into the extended state.

2. The reamer head connecting mechanism of the dredging cutter suction ship according to claim 1, wherein the force transmission assembly (5) comprises a placing groove (5.1) arranged on the inner wall of the screw hole (3), an installation cylinder (5.2) is installed in the placing groove (5.1), a limiting part (5.3) for limiting the rotation of the stud (1) is movably inserted in the installation cylinder (5.2), and the limiting part (5.3) is connected with the inner wall of the installation cylinder (5.2) through a first spring (5.4).

3. The reamer head connecting mechanism of a dredge cutter suction ship according to claim 2, characterized in that the bottom end of the mounting cylinder (5.2) is rotatably connected with the side wall of the placing groove (5.1) through a shaft column (5.21), and the bottom of the mounting cylinder (5.2) is kept in a horizontal state through a support member (5.22).

4. A reamer head attachment mechanism for a dredge cutter suction vessel according to claim 2, wherein the end of the top of the mounting cylinder (5.2) near the mouth of the cylinder is fixed to the inner top wall of the placement groove (5.1) by a second spring (5.23).

5. A reamer head attachment mechanism according to claim 2, wherein the stop member (5.3) is a first post (5.31) adapted to the inner wall of the mounting cylinder (5.2).

6. The reamer head connecting mechanism of the dredge cutter suction ship according to claim 2, wherein the limiting member (5.3) is a second post rod (5.32) adapted to the inner wall of the mounting cylinder (5.2), the bottom of the second post rod (5.32) is provided with a limiting groove (5.33), and a clamping block (5.34) fixed to the trigger component (6) is adapted and clamped in the limiting groove (5.33).

7. The reamer head connecting mechanism of a dredge cutter suction vessel according to claim 1, wherein the trigger assembly (6) comprises a mounting plate (6.1), the mounting plate (6.1) is connected with the bottom of the screw hole (3) through an elastic assembly (6.2), and a passive assembly (6.3) matched with the force transmission assembly (5) is mounted on the side surface of the mounting plate (6.1).

8. A reamer head attachment mechanism according to claim 7, in which the passive member (6.3) comprises a slot (6.31) in the side of the mounting plate (6.1).

9. Reamer head attachment for a dredge cutter-suction vessel, according to claim 8, characterized in that the end of the slot (6.31) is articulated with a flap (6.32) which can rotate perpendicularly to the mounting plate (6.1).

10. The reamer head connecting mechanism of the dredge cutter suction ship according to claim 1, characterized in that the side of the stud (1) is provided with a slot (1.1) communicated with the end thereof.

Technical Field

The invention relates to the technical field of excavating equipment, in particular to a reamer head connecting mechanism of a dredging cutter suction ship.

Background

The digging end of the dredging cutter suction ship is usually provided with a continuously rotating reamer head for digging silt so as to facilitate the suction and the conveying of a subsequent cutter suction pipe, and the continuously rotating reamer head is an indispensable important mechanism for the normal use of the dredging cutter suction ship.

The prior Chinese patent publication number is as follows: CN202324037U, the name of this patent is "a cutter suction dredger is with preventing stone reamer", this patent is including reamer wheel hub, reamer arm, reamer tooth and reamer circle, its characterized in that: the outside of reamer arm has along reamer arm trend welding to be used for preventing that large granule stone from getting into several baffles of mud sucking mouth, the height of several baffles reduces along with adjacent reamer arm opening the shelves interval gradually. Because the above technical scheme is adopted in the utility model, there is the baffle in the reamer arm outside along the welding of sword wall trend promptly, and this baffle can effectively reduce the probability of taking place of shutoff.

There is the weak point among the prior art to lie in, wherein the reamer head passes through double-screw bolt and reamer head screwed connection with the drive shaft that provides the continuous turning power, the rotation direction of its reamer head and the direction of screwing up of double-screw bolt on the reamer head are each other reverse, along with long-time use, make on reamer head and the double-screw bolt appear squeezing overload easily between the helix of helix and screw, lead to on the double-screw bolt and the helix deformation of the spiral hole of the looks adaptation on the reamer head, final reamer head and double-screw bolt are difficult to carry out reverse rotation and dismantle, the condition that can't be demolishd with the reamer head when the maintenance appears, the change of reamer head is not convenient for.

Disclosure of Invention

The invention aims to provide a reamer head connecting mechanism of a dredging cutter suction ship, which aims to overcome the defects in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme:

the utility model provides a dredge cutter head coupling mechanism who inhales ship, includes the double-screw bolt and is used for being connected fixed base with reamer blade, set up the screw with double-screw bolt looks spiro union on the base, be equipped with component mechanism in the screw, component mechanism is including:

a force transfer assembly including a compressed state within the base and an extended state connecting the base and the stud;

a trigger assembly connected to a bottom of the threaded bore, the trigger assembly receiving compression of the stud to cause the force transfer assembly to enter the extended state from the compressed state.

Preferably, the force transmission assembly comprises a placing groove formed in the inner wall of the screw hole, an installation barrel is installed in the placing groove, a limiting part for limiting rotation of the stud is movably inserted into the installation barrel, and the limiting part is connected with the inner wall of the installation barrel through a first spring.

Preferably, the bottom end of the mounting cylinder is rotatably connected with the side wall of the placing groove through a shaft column, and the bottom of the mounting cylinder is kept in a horizontal state through a supporting piece.

Preferably, one end of the top of the mounting cylinder, which is close to the cylinder opening of the mounting cylinder, is fixed to the inner top wall of the placing groove through a second spring.

Preferably, the limiting part is a first post rod matched with the inner wall of the installation cylinder.

Preferably, the locating part is the second post pole of installation section of thick bamboo inner wall looks adaptation, the spacing groove has been seted up to the bottom of second post pole, spacing inslot adaptation joint has the joint piece fixed mutually with the trigger subassembly.

Preferably, the trigger component comprises a mounting plate, the mounting plate is connected with the bottom of the screw hole through an elastic component, and a driven component matched with the force transmission component is mounted on the side face of the mounting plate.

Preferably, the passive component comprises a notch arranged on the side edge of the mounting plate.

Preferably, the end part of the notch is movably hinged with a baffle which can rotate perpendicular to the mounting plate.

Preferably, the side surface of the stud is provided with a clamping groove communicated with the end part of the stud.

In the technical scheme, the reamer head connecting mechanism of the dredging cutter suction ship provided by the invention shares and transfers the extrusion force between the screw hole and the stud by arranging the component force mechanism, so that the situation that the screw line extrusion forces of the screw holes matched with the stud and the reamer head are too large and deformed to be dismantled is favorably avoided, the situation that the screw line extrusion forces of the screw holes matched with the end part of the stud and the bottom of the screw hole are damaged due to excessive extrusion is also avoided, and the situation that the stud and the reamer head cannot be dismantled during maintenance is favorably avoided.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a side cross-sectional view of a base in an incompletely inserted state of a stud of a reamer head attachment mechanism of a dredge cutter suction vessel of the present invention;

FIG. 2 is a side cross-sectional view of the base with the studs of the reamer head attachment mechanism of the dredge cutter suction vessel of the present invention fully inserted;

FIG. 3 is a complete cross-sectional view of the base of FIG. 1 taken along line A-A thereof in accordance with the present invention;

FIG. 4 is an enlarged view of the invention at B of FIG. 2;

FIG. 5 is an enlarged view of FIG. 2 at C;

FIG. 6 is a schematic view of the mounting of the baffle of the reamer head attachment mechanism of a dredge cutter suction vessel of the present invention in the sidewall groove;

FIG. 7 is a schematic view of a position limiting member of a reamer head coupling mechanism of a dredge cutter suction vessel according to the present invention;

FIG. 8 is a partial perspective view of a reamer head attachment mechanism of a dredge cutter suction vessel of the present invention in a first state;

fig. 9 is a partial perspective view of a reamer head attachment mechanism of a dredge cutter suction vessel in a second state of the present invention.

Description of reference numerals:

1. a stud; 1.1, a clamping groove; 1.2, a cover plate; 1.3, sealing grooves; 1.4, sealing a gasket; 1.5, a through hole; 1.6, inserting a rod; 1.7, a protruding component; 1.71, a track groove; 1.72, bumps; 1.8, a hard ring; 1.9, a ring groove; 2. a base; 3. a screw hole; 4. a force component mechanism; 5. a force transfer assembly; 5.1, placing a groove; 5.2, mounting the cylinder; 5.21, a shaft column; 5.22, a support; 5.23, a second spring; 5.3, a limiting piece; 5.31, a first post rod; 5.32, a second post; 5.33, limiting grooves; 5.34, a clamping block; 5.341, a plate body; 5.342, protruding teeth; 5.4, a first spring; 6. a trigger component; 6.1, mounting a plate; 6.2, an elastic component; 6.21, placing holes; 6.22, supporting a top post; 6.23, a third spring; 6.3, passive components; 6.31, notches; 6.311, sidewall slots; 6.312, mounting shaft; 6.313, a limiting block; 6.314, a torsion spring; 6.32, baffle.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

Referring to fig. 1-9, a reamer head connecting mechanism of a dredge cutter suction ship provided in an embodiment of the present invention includes a stud 1 and a base 2 for connecting and fixing with a reamer blade, the base 2 is provided with a screw hole 3 screwed with the stud 1, a force component mechanism 4 is disposed in the screw hole 3, the force component mechanism 4 includes:

a force transfer assembly 5 comprising a compressed state within the base 2 and an extended state connecting the base and the stud 2;

a trigger assembly 6 connected to the bottom of the threaded bore 3, the trigger assembly 6 receiving compression of the stud 1 to bring the force transfer assembly 5 from the compressed state to the extended state.

It is specific, current reamer head is in rotating the use, long-time use makes on reamer head and double-screw bolt 1 helix and screw 3 appear extruding overload between the helix, lead to on the double-screw bolt 1 and the helix in the spiral hole of the looks adaptation warp, final reamer head is difficult to carry out reverse rotation with double-screw bolt 1 and dismantles, the condition that double-screw bolt 1 and reamer head can't be demolishd when overhauing the maintenance appears, the change of reamer head is not convenient for, and through set up component mechanism 4 between double-screw bolt 1 and base 2, thereby can play the effect of sharing the extrusion force between the extrusion, be favorable to preventing that the helix in spiral hole from warping, play to share the extrusion force and play the guard action to the helix in spiral hole.

Specifically, the base 2 is used for being connected and fixed on each reamer blade, the base 2 is a cylindrical base body, each reamer blade is fixed on the arc-shaped side surface of the base 2, the screw hole 3 is formed in one end of the base 2, the screw hole 3 is used for connecting the stud 1 with the base 2, when the stud 1 is not inserted into the screw hole 3, the force transmission component 5 and the trigger component 6 are on the same horizontal plane, the force transmission component 5 is not extruded with the trigger component 6 at the bottom end of the stud 1, the force transmission component 5 keeps a contraction state under the limiting action of the trigger component 6, the force transmission component 5 in the contraction state does not cause any influence on the stud 1, the stud 1 can normally rotate spirally in the screw hole 3, when the bottom end of the stud 1 is extruded with the trigger component 6 and the trigger component 6 moves downwards, the trigger component 6 still keeps limiting the force transmission component 5, the force transmission component 5 is kept in a contraction state, when the trigger component 6 is pressed by the stud 1 to move downwards, when the trigger component 6 is separated from the force transmission component 5, the clamping groove 1.1 on the stud 1 is aligned with the force transmission component 5, meanwhile, the trigger component 6 no longer plays a role in limiting the force transmission component 5, at the moment, the force transmission component 5 deforms to be in a stretching state and is clamped with the clamping groove 1.1, thereby limiting the rotation of the stud 1, the force transmission assembly 5 disperses the torque force generated by the rotation of the stud 1 to the base 2, meanwhile, the stud 1 can not rotate, thereby sharing and transferring the extrusion force between the screw hole 3 and the stud 1, being beneficial to avoiding the situation that the helical line extrusion force of the screw hole matched with the stud 1 and the reamer head is too large and deformed to be dismantled, and meanwhile, the damage caused by excessive extrusion between the end part of the stud 1 and the hole bottom of the screw hole 3 is avoided.

As a preferable technical solution of this embodiment, the force transmission assembly 5 includes a placement groove 5.1 opened on an inner wall of the screw hole 3, a mounting cylinder 5.2 is installed in the placement groove 5.1, a limiting member 5.3 for limiting rotation of the stud 1 is movably inserted into the mounting cylinder 5.2, the limiting member 5.3 is connected with the inner wall of the mounting cylinder 5.2 through a first spring 5.4, the placement groove 5.1 is a rectangular groove, the number of the placement grooves 5.1 is not less than two, the placement grooves 5.1 are uniformly distributed along the screw hole 3, a side groove wall of the placement groove 5.1 is perpendicular to a hole bottom surface of the screw hole 3, an outer side surface of the mounting cylinder 5.2 is a rectangular surface, the outer side surface of the mounting cylinder 5.2 is parallel to the side groove wall of the placement groove 5.1, so that the mounting cylinder 5.2 and the side groove wall of the placement groove 5.1 maintain a good contact area, in an actual use process, when the trigger assembly 6 is separated from the force transmission assembly 5, at this moment, the limiting part 5.3 moves outwards under the action of the elastic force of the first spring 5.4, so that the force transmission assembly 5 is in an extending state until the limiting part 5.3 is clamped with the clamping groove 1.1, thereby completing the limiting effect on the rotation of the stud 1, at this moment, the value of the inserting length of the limiting part 5.3 in the installation cylinder 5.2 is not less than one half of the whole length of the limiting part 5.3, wherein the end part of the installation cylinder 5.2 parallel to the bottom surface of the hole of the screw hole 3 is flush with the inner wall of the screw hole 3, on one hand, the blocking caused when the stud 1 is inserted into the screw hole 3 is avoided, on the other hand, the contact surface of the installation cylinder 5.2 and the limiting part 5.3 in the extending state is increased to the maximum degree, and the limiting part 5.3 is enabled to be directly acted on the groove wall of the placing groove 5.1 by the deflection force of the stud 1, thereby being beneficial to preventing the bending situation that the installation cylinder 5.2 is over-stressed.

As a preferable technical solution of this embodiment, the bottom end of the mounting tube 5.2 is rotatably connected to the sidewall of the placement groove 5.1 through a shaft post 5.21, the bottom of the mounting tube 5.2 is kept in a horizontal state through a support member 5.22, the shaft post 5.21 is parallel to the bottom surface of the screw hole 3, and the shaft post 5.21 is perpendicular to the side surface of the mounting tube 5.2, so that the mounting tube 5.2 can deflect in the placement groove 5.1, wherein the support member 5.22 is a bar-shaped memory metal member such as a rod post, during actual use, when it is necessary to remove the force component effect and the limiting effect of the force transmission assembly 5, the position of the placement groove 5.1 inside the base 2 can be heated through a high-temperature heating device such as a flame gun, when the support member 5.22 is in a normal temperature state, such as when the temperature is lower than 150 ℃, the support member 5.22 keeps a straight rod state, so as to keep the support effect on the bottom of the mounting tube 5.2, when the memory deformation temperature of the support member 5.22 is reached, if the temperature reaches 160 ℃ and above 160 ℃, the support member 5.22 is bent and the like, the support member 5.22 is bent into a V shape, the bottom of the mounting tube 5.2 cannot be kept in a horizontal state by the support member 5.22 in the state, at this time, the mounting tube 5.2 can deflect around the shaft column 5.21, so that the limiting member 5.3 is separated from the slot 1.1 on the stud 1, and at this time, the stud 1 can rotate reversely until the stud 1 is separated from the screw hole 3.

As a preferable technical solution of this embodiment, one end of the top of the mounting tube 5.2 near the tube opening thereof is fixed to the inner top wall of the placement groove 5.1 by the second spring 5.23, and in practical use, when the shape of the supporting member 5.22 changes, the elastic force of the second spring 5.23 in the compressed state further provides power for the mounting tube 5.2 to deflect around the axle column 5.21, which helps the limiting member 5.3 to disengage from the slot 1.1 on the stud 1.

As a preferable technical solution of this embodiment, the limiting member 5.3 is a first post rod 5.31 adapted to an inner wall of the mounting cylinder 5.2, when the force transmission assembly 5 is in a contracted state, the first post rod 5.31 is located inside the mounting cylinder 5.2, an end of the first post rod 5.31 abuts against a planar surface on the trigger assembly 6, and an end of the first post rod 5.31 is a planar end, in an actual use process, when the trigger assembly 6 is squeezed by the stud 1 to move, the first post rod 5.31 and the trigger assembly 6 move relatively, and when the trigger assembly 6 is separated from the first post rod 5.31, the trigger assembly 6 does not have a limiting effect on the first post rod 5.31, that is, the trigger assembly 6 does not limit the force transmission assembly 5 any more.

As a preferred technical solution of this embodiment, the limiting member 5.3 is a second post 5.32 adapted to an inner wall of the mounting barrel 5.2, a limiting groove 5.33 is formed at the bottom of the second post 5.32, a clamping block 5.34 fixed to the trigger assembly 6 is adapted to be clamped in the limiting groove 5.33, the clamping block 5.34 includes a plate 5.341, a protruding tooth 5.342 adapted to the limiting groove 5.33 is fixed to the plate 5.341, in an actual use process, the trigger assembly 6 is fixed to the plate 5.341, and the second post 5.32 is limited by clamping the protruding tooth 5.342 to the limiting groove 5.33, when the trigger assembly 6 is pressed by the stud 1 to move, the protruding tooth 5.342 is separated from the limiting groove 5.33, at this time, the trigger assembly 6 does not have a limiting effect on the second post 5.32, that is, the trigger assembly 6 does not limit the force transmission of the trigger assembly 5.

As a preferable technical scheme of this embodiment, the triggering component 6 includes a mounting plate 6.1, the mounting plate 6.1 is connected to the bottom of the screw hole 3 through an elastic component 6.2, a passive component 6.3 matched with the force transmission component 5 is installed on a side surface of the mounting plate 6.1, the passive component 6.3 limits the force transmission component 5 in a contracted state, wherein the elastic component 6.2 includes a placement hole 6.21 opened on the bottom surface of the screw hole 3, a supporting pillar 6.22 is inserted into the placement hole 6.21, the bottom end of the supporting pillar 6.22 is connected to the bottom of the placement hole 6.21 through a third spring 6.23, and the top end of the supporting pillar 6.22 is fixed to the mounting plate 6.1, so that the mounting plate 6.1 maintains a certain clearance space with the bottom of the screw hole 3 when not being squeezed, and the mounting plate 6.1 has a sufficient moving space when being squeezed by the stud 1.

As a preferred technical solution of this embodiment, the passive component 6.3 includes a notch 6.31 opened at a side edge of the mounting plate 6.1, and in actual use, when the mounting cylinder 5.2 deflects, the notch 6.31 can be used for the mounting cylinder 5.2 to pass through the mounting plate 6.1.

As a preferable technical solution of this embodiment, the end of the notch 6.31 is movably hinged with a baffle 6.32 that can rotate perpendicular to the mounting plate 6.1, the side surface of the baffle 6.32 abuts against the end of the first post 5.31 on the force transmission assembly 5, the baffle 6.32 is a planar portion of the trigger assembly 6 abutting against the end of the first post 5.31, specifically, the groove wall of the notch 6.31 is provided with a side wall groove 6.311 adapted to the baffle 6.32, the inside of the side wall groove 6.311 movably connects one end of the baffle 6.32 through a mounting shaft 6.312, the mounting shaft 6.312 is connected with the baffle 6.32 through a torsion spring 6.314, the top of the baffle 6.32 is provided with a limit block 6.313 fixed to the side wall groove 6.311, so as to limit the deflection range of the baffle 6.32, so that the baffle 6.32 cannot deflect upwards, that is, the baffle 6.32 cannot deflect towards the opening end of the screw hole 3, when the mounting cylinder 5.2 passes through the notch 6.31 and passes through the mounting plate 6.1, the baffle 6.32 is deflected around the mounting shaft 6.312, at the same time, the torsion spring 6.314 is deformed, so that the mounting barrel 5.2 passes through the notch 6.31 smoothly through the notch 6.31.

As a preferred technical scheme of this embodiment, a clamping groove 1.1 communicated with an end portion of the stud 1 is formed in a side surface of the stud 1, a length direction of the clamping groove 1.1 is parallel to an axial direction of the stud 1, and a bottom end of the clamping groove 1.1 is communicated with a bottom end of the stud 1.

The outer side of double-screw bolt 1 is fixed with apron 1.2, apron 1.2 and the seal groove 1.3 looks adaptation of 3 opening ends in screw, apron 1.2 and seal groove 1.3 are circular, the bottom of apron 1.2 is fixed with seal ring 1.4, seal ring 1.4 is the elasticity packing ring, it is used for increasing the leakproofness between apron 1.2 and seal groove 1.3, the bottom of seal groove 1.3 is seted up has ring groove 1.9, the inside adaptation of ring groove 1.9 has placed stereoplasm ring 1.8, the tank bottom of ring groove 1.9 is seted up a plurality of through holes 1.5 that communicate in standing groove 5.1, the inside of through hole 1.5 is equipped with inserted bar 1.6, the bottom of inserted bar 1.6 contacts with bulge subassembly 1.7 when passing force subassembly 5 extension state, in the use, seal ring 1.4 covers on ring groove 1.9.

The convex component 1.7 comprises a track groove 1.71 penetrating through the side surface of the mounting cylinder 5.2, when the mounting cylinder 5.2 is in a horizontal state, the track groove 1.71 is positioned at the top of the mounting cylinder 5.2, a bump 1.72 fixed with the limiting piece 5.3 is movably penetrated inside the track groove 1.71, the bump 1.72 is preferably a ladder-shaped block, two sides of the bump 1.72 are inclined planes of forty-five degrees, so that the bottom end of the inserted bar 1.6 moves along the side edge of the bump 1.72, the top of the bump 1.72 extends out of the outer side surface of the mounting cylinder 5.2, when the force transmission component 5 is in an extension state, the bump 1.72 moves along the track groove 1.71 along the limiting piece 5.3, so that the inserted bar 1.6 moves along the side edge of the bump 1.72 in the process of moving towards the inserted bar 1.6, so that the position of the inserted bar 1.6 moves upwards, and the track groove 1.71 passes through the bump 1.72, and the separation of the limiting part 5.3 and the mounting cylinder 5.2 is also favorably prevented, and the bottom end of the inserted link 1.6 is an arc end, so that the friction resistance when the inserted link 1.6 and the bump 1.72 slide relatively in front is reduced.

When the insert rod 1.6 moves upwards, the hard ring 1.8 is extruded by the insert rod 1.6 to move, so that the adjacent sealing washer 1.4 is extruded, at the moment, the hard ring 1.8 still does not separate from the ring groove 1.9, the deformation of the sealing washer 1.4 is further increased, the sealing effect between the cover plate 1.2 and the sealing groove 1.3 is further improved favorably, when the lug 1.72 moves along with the installation cylinder 5.2 and separates from the insert rod 1.6, and the lug 1.72 does not provide supporting force for the insert rod 1.6 any more, the hard ring 1.8 and the insert rod 1.6 move under the elastic extrusion effect of the sealing washer 1.4, so that the elastic force of the sealing washer 1.4 acts on the installation cylinder 5.2 through the insert rod 1.6, and the installation cylinder 5.2 rotates around the shaft post 5.21.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.