CN216464849U

CN216464849U - Structure for controlling rotary cutter arm in fast and slow segmented mode

Info

Publication number: CN216464849U
Application number: CN202120646646.2U
Authority: CN
Inventors: 刘洋; 李卓
Original assignee: DEKUMA RUBBER AND PLASTIC TECHNOLOGY (DONGGUAN) Ltd
Current assignee: DEKUMA RUBBER AND PLASTIC TECHNOLOGY (DONGGUAN) Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-05-10
Anticipated expiration: 2031-03-30

Abstract

The utility model provides a structure for controlling a rotary cutter arm in a fast and slow segmented manner, which comprises a chassis and a hydraulic cylinder, the utility model provides a cutter arm assembly and speed reduction hydraulic cylinder, the one end pin joint of pneumatic cylinder is on the chassis, the other end of pneumatic cylinder and the one end pin joint of cutter arm assembly, the middle part pin joint of cutter arm assembly is on the chassis, the other end of cutter arm assembly is equipped with the cutter installation position that supplies the cutter installation, speed reduction hydraulic cylinder sets up on the chassis, speed reduction hydraulic cylinder includes the speed reduction cylinder body, piston and locating part, be equipped with first speed reduction mouth and second speed reduction mouth on the speed reduction cylinder body, be connected through the connecting pipe between first speed reduction mouth and the pneumatic cylinder hydraulic fluid port, the piston is movably to be set up in the speed reduction inner chamber, be equipped with first runner and the second runner that feeds through between first inner chamber and second inner chamber in the piston at interval, first runner is equipped with the choke valve, the second runner is equipped with the check valve, the locating part is used for spacing the removal to the piston. The utility model effectively shortens the feeding period of the cutter arm assembly and improves the cutting efficiency.

Description

Structure for controlling rotary cutter arm in fast and slow segmented mode

Technical Field

The utility model relates to the technical field of cutting equipment of a pipe material of an extruder line, in particular to a structure for controlling a rotary cutter arm in a fast and slow segmented manner.

Background

The cutting equipment for the wire pipe of the extruder is used for cutting the wire pipe, and is provided with a cutter arm rotating and cutting mechanism for cutting the wire pipe, the mechanism generally comprises a base plate, a cutter feeding oil cylinder and a cutter arm assembly, one end of the cutter feeding oil cylinder is rotatably connected onto the base plate through a rotating shaft, the other end of the cutter feeding oil cylinder is rotatably connected with one end of the cutter arm assembly, the middle of the cutter arm assembly is rotatably connected onto the base plate through a rotating shaft, a cutter is arranged at the other end of the cutter arm assembly, and the cutter of the cutter arm assembly is driven to rotate through the cutter feeding oil cylinder, so that the cutter of the cutter arm assembly cuts the wire pipe. At present, the mechanism adopts a flow control valve to control the working speed of the feed oil cylinder so as to control the rotating speed of the knife arm assembly, and the following problems exist in the control of the working speed of the feed oil cylinder by utilizing the flow control valve: firstly, the working speed of the cutter feeding oil cylinder is low, only one rotating speed is needed, so that the rotating feeding speed of the cutter arm assembly is reduced, the time consumed by the cutter arm assembly in the idle stroke is long, the cutting working efficiency is low, and the rotating feeding speed of the cutter arm assembly is regulated by the flow control valve, so that the effect of precise regulation is difficult to achieve; secondly, the initial position of the cutter arm assembly is adjusted through an oil cylinder adjusting screw rod, and the adjustment is inconvenient; thirdly, under the interference of an electric signal, the electromagnetic valve is blocked, so that the failure that the knife arm assembly does not retract easily occurs, and the knife arm assembly or the chassis is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a structure for controlling a rotary cutter arm in a fast and slow segmented manner, which effectively shortens the feeding period of a cutter arm assembly and improves the cutting efficiency.

In order to achieve the above purpose, the utility model provides a structure for controlling a rotary knife arm in a fast and slow segmented manner, which comprises a chassis, a hydraulic cylinder, a knife arm assembly and a deceleration hydraulic cylinder, wherein one end of the hydraulic cylinder is pivoted on the chassis, the other end of the hydraulic cylinder is pivoted with one end of the knife arm assembly, the middle part of the knife arm assembly is pivoted on the chassis, the other end of the knife arm assembly is provided with a cutter mounting position for mounting a cutter, the deceleration hydraulic cylinder is arranged on the chassis and comprises a deceleration cylinder body, a piston and a limiting part, a first deceleration port and a second deceleration port are arranged on the deceleration cylinder body at intervals, the first deceleration port is connected with an oil port of the hydraulic cylinder through a connecting pipe, a deceleration inner cavity is arranged inside the deceleration cylinder body, the piston is movably arranged in the deceleration inner cavity, and the piston divides the deceleration inner cavity into a first inner cavity and a second inner cavity, the first speed reduction port is communicated with the first inner cavity, the second speed reduction port is communicated with the second inner cavity, a first flow passage and a second flow passage which are communicated between the first inner cavity and the second inner cavity are arranged in the piston at intervals, the first flow passage is provided with a throttle valve for liquid to enter the second inner cavity from the first inner cavity, the second flow passage is provided with a one-way valve for liquid to enter the first inner cavity from the second inner cavity, and one end of the limiting part is arranged in the second inner cavity and used for limiting the movement of the piston.

Preferably, the structure of the segment control rotary tool arm further comprises a first connecting shaft, one end of the hydraulic cylinder is connected with the first connecting shaft, and the first connecting shaft is pivoted on the chassis.

Preferably, the other end of the hydraulic cylinder is pivotally connected to one end of the knife arm assembly through a pivot pin.

Preferably, the structure for controlling the rotating knife arm in a fast and slow segmented manner further comprises a second connecting shaft, the second connecting shaft is arranged on the chassis, and the middle part of the knife arm assembly is sleeved on the second connecting shaft and is pivoted with the second connecting shaft.

Preferably, the knife arm assembly comprises a knife arm body and a clamping block, the first end of the knife arm body is sleeved on the second connecting shaft and is pivoted with the second connecting shaft, the cutter mounting position is arranged on the second end of the knife arm body, one end of the clamping block is rotatably and adjustably arranged on the first end of the knife arm body, and the other end of the clamping block is pivoted with the hydraulic cylinder.

Preferably, one end of the clamping block is sleeved on the first end of the cutter arm body in an elastic-adjustable manner; the tool arm body is loosened through the clamping block, so that the tool arm body and the clamping block can be rotatably adjusted; the clamping block is locked on the tool arm body, so that the tool arm body and the clamping block can act together.

Preferably, the clamping block is provided with an adjusting scale, and the tool arm body is provided with an indicating line for indicating the adjusting scale.

Preferably, the structure of the rotating cutter arm with the speed and the speed controlled in a segmented manner further comprises a cutter, and the cutter is mounted on the cutter mounting position.

Preferably, the hydraulic cylinder further comprises an elastic member for restoring the piston, and the elastic member is connected to the piston and a side wall of the reduction cylinder body.

Preferably, the structure of the rotary tool arm controlled by the fast and slow sections further comprises an electric control system, and the electric control system is respectively connected with the hydraulic cylinder and the speed reduction hydraulic cylinder.

Compared with the prior art, the structure of the rotating knife arm with the fast and slow segmented control has the advantages that the reducing hydraulic cylinder connected with the hydraulic cylinder is arranged, in the initial knife feeding stage, liquid of the hydraulic cylinder can enter the first inner cavity of the reducing hydraulic cylinder through the connecting pipe and can quickly push the piston to move, so that the hydraulic cylinder can quickly operate and work, the knife arm component is quickly pushed to rotate, fast knife feeding is realized, the feeding period of the knife arm component is effectively shortened, and the cutting efficiency is improved; then, the piston is limited by the limiting part so that the piston cannot move continuously, liquid in the first inner cavity slowly enters the second inner cavity from the first flow channel through the throttle valve to reduce the working speed of the hydraulic cylinder, so that the rotating speed of the cutter arm assembly is reduced, low-speed feed is realized, the cutter can safely and stably cut the pipe wire, and the phenomenon of cutter breakage is avoided.

Drawings

Fig. 1 is a schematic perspective view of the structure of the rotary cutter arm with fast and slow segment control according to the present invention.

Fig. 2 is a schematic structural view of the knife arm assembly of the present invention.

Fig. 3 is a schematic diagram of the connection among the hydraulic cylinder, the retarding hydraulic cylinder and the electric control system of the present invention.

Fig. 4 is a schematic diagram of the hydraulic cylinder and retarding hydraulic cylinder of the present invention during fast feed.

Fig. 5 is a schematic diagram of the hydraulic cylinder and retarding hydraulic cylinder of the present invention during low feed.

Fig. 6 is a schematic diagram of the hydraulic cylinder and the retarding hydraulic cylinder of the present invention during rapid tool retracting.

FIG. 7 is a schematic diagram of the hydraulic cylinder and retarding hydraulic cylinder of the present invention in the retracted position.

Detailed Description

In order to explain technical contents and structural features of the present invention in detail, the following description is made with reference to the embodiments and the accompanying drawings.

Referring to fig. 1, 5 and 6, the structure 100 of the present invention for controlling the rotary knife arm in a fast and slow manner includes a chassis 1, a hydraulic cylinder 2, a knife arm assembly 3, a deceleration hydraulic cylinder 4 and a cutting knife 6. The one end pin joint of pneumatic cylinder 2 is on chassis 1, and the other end of pneumatic cylinder 2 and the one end pin joint of arm of a knife subassembly 3, the middle part pin joint of arm of a knife subassembly 3 is on chassis 1, and the other end of arm of a knife subassembly 3 is equipped with the 6 installation positions of cutter that supply 6 installation of cutter, and cutter 6 installs on 6 installation positions of cutter. The decelerating hydraulic cylinder 4 is arranged on the chassis 1, the decelerating hydraulic cylinder 4 comprises a decelerating cylinder body 41, a piston 42 and a limiting piece 43, a first decelerating port 411 and a second decelerating port 412 are arranged on the decelerating cylinder body 41 at intervals, the first decelerating port 411 is connected with an oil port of the hydraulic cylinder 2 through a connecting pipe 5, a decelerating inner cavity is arranged inside the decelerating cylinder body 41, the piston 42 is movably arranged in the decelerating inner cavity, the decelerating inner cavity is divided into a first inner cavity 413 and a second inner cavity 414 by the piston 42, the first decelerating port 411 is communicated with the first inner cavity 413, the second decelerating port 412 is communicated with the second inner cavity 414, a first flow passage 421 and a second flow passage 422 which are communicated between the first inner cavity 413 and the second inner cavity 414 are arranged in the piston 42 at intervals, a throttle valve 421a for liquid to enter the second inner cavity 414 from the first inner cavity 413 is arranged on the first flow passage 421, a one-way valve 422 for liquid to enter the first inner cavity 413 from the second inner cavity 414 is arranged on the second flow passage 422, one end of the limiting member 43 is disposed in the second inner cavity 414 and is used for limiting the movement of the piston 42.

In the initial feeding stage, the liquid in the hydraulic cylinder 2 can enter the first inner cavity 413 of the deceleration hydraulic cylinder 4 through the connecting pipe 5 and can quickly push the piston 42 to move, so that the hydraulic cylinder 2 can quickly operate and work, and quickly push the cutter arm assembly 3 to rotate, thereby realizing quick feeding, effectively shortening the feeding period of the cutter arm assembly 3 and improving the cutting efficiency; next, the limiting member 43 limits the piston 42 to prevent the piston 42 from moving continuously, and the liquid in the first inner cavity 413 slowly enters the second inner cavity 414 from the first flow passage 421 through the throttle valve 421a to reduce the working speed of the hydraulic cylinder 2, so as to reduce the rotating speed of the knife arm assembly 3, and implement low-speed feeding, so that the cutting knife 6 can safely and stably cut the pipe wire, and avoid the occurrence of knife breakage.

Referring to fig. 1 and 2, in the embodiment, the structure 100 for controlling the rotating knife arm in a fast and slow segmented manner further includes a first connecting shaft 11, one end of the hydraulic cylinder 2 is connected to the first connecting shaft 11, the first connecting shaft 11 is pivoted to the chassis 1, the hydraulic cylinder 2 can rotate via the first connecting shaft 11, the other end of the hydraulic cylinder 2 is pivoted to one end of the knife arm assembly 3 via a rotating pin 21, and the hydraulic cylinder 2 and the knife arm assembly 3 can rotate relatively. More specifically, the structure 100 for controlling the rotary knife arm in a fast and slow segmented manner further comprises a second connecting shaft 12, the second connecting shaft 12 is arranged on the chassis 1, and the middle part of the knife arm assembly 3 is sleeved on the second connecting shaft 12 and is pivoted with the second connecting shaft 12. In this embodiment, the knife arm assembly 3 is rotatable about the second connecting shaft 12.

Referring to fig. 1 and fig. 2, in the present embodiment, the knife arm assembly 3 includes a knife arm body 31 and a clamping block 32, a first end of the knife arm body 31 is sleeved on the second connecting shaft 12 and pivotally connected to the second connecting shaft 12, the installation position of the cutting knife 6 is disposed on a second end of the knife arm body 31, one end of the clamping block 32 is rotatably and adjustably disposed on the first end of the knife arm body 31, and the other end of the clamping block 32 is pivotally connected to the hydraulic cylinder 2. Specifically, one end of the clamping block 32 is sleeved on the first end of the tool arm body 31 in an elastic-adjustable manner; the tool arm body 31 is loosened by the clamping block 32, so that the tool arm body 31 and the clamping block 32 can be rotatably adjusted; the tool arm body 31 is locked on the tool arm body 31 by the clamping block 32, so that the tool arm body 31 and the clamping block 32 can act together. Wherein, one end of the clamping block 32 can adopt the existing half-open mode or the full-open structure, and the clamping block 32 can be locked by the existing bolt. More specifically, a bearing portion 312 is convexly provided on the peripheral side of the first end of the tool arm body 31, and the clamp block 32 is borne on the bearing portion 312. The bearing portion 312 ensures that the clamping block 32 can be firmly clamped to the tool arm body 31.

Referring to fig. 2, the clamping block 32 is provided with an adjustment scale 321, and the tool arm body 31 is provided with an indication line 311 for indicating the adjustment scale 321. When the clamping block 32 releases the tool arm body 31, the clamping block 32 and the tool arm body 31 can be adjusted in a rotating manner according to the adjusting scale 321 and the indicating line 311, so that the initial position of the cutting knife 6 on the installation position of the cutting knife 6 of the tool arm assembly 3 can be adjusted quickly.

Referring to fig. 3 and 4, the retarding cylinder 4 further includes an elastic member 44 for restoring the piston 42, and the elastic member 44 is connected to the piston 42 and the sidewall of the retarding cylinder 41. The elastic member 44 may employ an existing compression spring or the like. Further, the structure 100 for controlling the rotating knife arm in a fast and slow segmented manner further comprises an electric control system 7, and the electric control system 7 is respectively connected with the hydraulic cylinder 2 and the deceleration hydraulic cylinder 4. The specific principle of the electronic control system 7 is well known to those skilled in the art, and therefore, will not be described herein.

With reference to fig. 1 to 3, the specific working principle of the structure 100 for segment-controlled fast and slow rotary tool arms according to the present invention is as follows:

fast feeding: as shown in fig. 4, in the initial feeding stage, the liquid in the hydraulic cylinder 2 can enter the first inner cavity 413 of the deceleration hydraulic cylinder 4 through the connecting pipe 5, and the piston 42 has low resistance and is easy to push, so that the piston 42 can be quickly pushed to move and compress the elastic member 44, the hydraulic cylinder 2 can quickly operate and work, and the knife arm assembly 3 can be quickly pushed to rotate, thereby driving the cutter 6 to quickly rotate, realizing quick feeding, effectively shortening the feeding period of the knife arm assembly 3, and improving the cutting efficiency.

Low-speed feed: as shown in fig. 5, when the piston 42 moves to the position of the limiting member 43, the limiting member 43 limits the piston 42 so that the piston 42 cannot move continuously, the liquid in the first inner cavity 413 slowly enters the second inner cavity 414 from the first flow passage 421 through the throttle valve 421a to reduce the working speed of the hydraulic cylinder 2, thereby reducing the rotating speed of the knife arm assembly 3, realizing low-speed knife feeding, and enabling the cutting knife 6 to cut the pipe wire safely and stably to avoid the occurrence of knife breakage.

And (3) fast retracting: as shown in fig. 6, after the cutting knife 6 cuts the pipe wire, the piston 42 pushes the piston 42 to move and reset rapidly under the elastic restoring force of the elastic member 44, and simultaneously, the hydraulic cylinder 2 also realizes a rapid retraction action under the spring force thereof, so that the hydraulic cylinder 2 pushes the knife arm assembly 3 to rotate rapidly in a reverse direction, and the cutting knife 6 retracts rapidly. And active reset can reduce the failure rate.

Retracting the cutter in place: as shown in fig. 7, after the piston 42 is reset to the proper position, the liquid in the second inner chamber 414 enters the first inner chamber 413 through the check valve 422a and then flows into the hydraulic cylinder 2, so that the hydraulic cylinder 2 can be continuously and rapidly retracted to the original position, and the knife arm assembly 3 and the knife 6 can be rapidly reset, and finally the knife 6 is retracted to the proper position.

In summary, the structure 100 for controlling the rotary knife arm in a fast and slow segmented manner of the present invention is provided with the deceleration hydraulic cylinder 4 connected with the hydraulic cylinder 2, so that in the initial feeding stage, fast feeding can be realized, the feeding period of the knife arm assembly 3 is effectively shortened, and the cutting efficiency is improved. Next, the piston 42 is limited by the limiting member 43 to reduce the operating speed of the hydraulic cylinder 2, so as to reduce the rotating speed of the knife arm assembly 3, and realize low-speed feeding, so that the cutter 6 can safely and stably cut the pipe wire, and avoid the occurrence of knife breakage. Through setting up elastic component 44 for arm of a knife subassembly 3 can drive cutter 6 and reset fast, realizes withdrawing the sword fast. Through the arrangement of the one-way valve 422a, the hydraulic cylinder 2 can be continuously and rapidly withdrawn to return to the original position, so that the knife arm assembly 3 and the cutting knife 6 can be rapidly reset, and finally the cutting knife 6 is withdrawn to the position. The structure 100 for sectionally controlling the rotary cutter arm in speed can improve the cutting efficiency and is suitable for wide popularization and use; the relative position of the cutter arm body and the clamping block can be quickly adjusted according to the adjusting scales and the indicating lines, so that the initial position of the quick cutter is quickly adjusted; the knife arm assembly can still keep a retraction state under the condition of no electric signal or solenoid valve clamping and the like.

The above disclosure is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the utility model, so that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the utility model.

Claims

1. A structure for controlling a rotary knife arm in a fast-slow segmented mode is characterized by comprising a chassis, a hydraulic cylinder, a knife arm assembly and a speed reducing hydraulic cylinder, wherein one end of the hydraulic cylinder is pivoted on the chassis, the other end of the hydraulic cylinder is pivoted with one end of the knife arm assembly, the middle of the knife arm assembly is pivoted on the chassis, the other end of the knife arm assembly is provided with a cutter mounting position for mounting a cutter, the speed reducing hydraulic cylinder is arranged on the chassis and comprises a speed reducing cylinder body, a piston and a limiting part, a first speed reducing port and a second speed reducing port are arranged on the speed reducing cylinder body at intervals, the first speed reducing port is connected with an oil port of the hydraulic cylinder through a connecting pipe, a speed reducing inner cavity is arranged inside the speed reducing cylinder body, the piston is movably arranged in the speed reducing inner cavity, and the speed reducing inner cavity is divided into a first inner cavity and a second inner cavity by the piston, the first speed reduction port is communicated with the first inner cavity, the second speed reduction port is communicated with the second inner cavity, a first flow passage and a second flow passage which are communicated between the first inner cavity and the second inner cavity are arranged in the piston at intervals, the first flow passage is provided with a throttle valve for liquid to enter the second inner cavity from the first inner cavity, the second flow passage is provided with a one-way valve for liquid to enter the first inner cavity from the second inner cavity, and one end of the limiting part is arranged in the second inner cavity and used for limiting the movement of the piston.

2. The structure of claim 1, further comprising a first connecting shaft, wherein one end of the hydraulic cylinder is connected to the first connecting shaft, and the first connecting shaft is pivotally connected to the chassis.

3. The structure of the fast and slow segmented control rotary knife arm according to claim 1, characterized in that the other end of the hydraulic cylinder is pivoted with one end of the knife arm assembly through a rotary pin.

4. The structure of the rotary cutter arm controlled by segments according to claim 1, further comprising a second connecting shaft, wherein the second connecting shaft is arranged on the chassis, and the middle part of the cutter arm assembly is sleeved on the second connecting shaft and pivoted with the second connecting shaft.

5. The structure of the rotary cutter arm controlled by the fast and slow segments as claimed in claim 4, wherein the cutter arm assembly comprises a cutter arm body and a clamping block, the first end of the cutter arm body is sleeved on the second connecting shaft and pivoted with the second connecting shaft, the cutter mounting position is arranged at the second end of the cutter arm body, one end of the clamping block is rotatably and adjustably arranged at the first end of the cutter arm body, and the other end of the clamping block is pivoted with the hydraulic cylinder.

6. The structure of the rotary cutter arm with the sectional control of the speed as claimed in claim 5, wherein one end of the clamping block is sleeved on the first end of the cutter arm body in an elastic-adjustable manner; the tool arm body is loosened through the clamping block, so that the tool arm body and the clamping block can be rotatably adjusted; the tool arm body and the clamping block can move together by locking the clamping block on the tool arm body.

7. The structure of the rotary tool arm controlled by stages according to claim 5, wherein the clamping block is provided with adjusting scales, and the tool arm body is provided with indicating lines for indicating the adjusting scales.

8. The structure of the rotary cutter arm with the fast and slow segmented control function as claimed in claim 1, further comprising a cutter, wherein the cutter is mounted on the cutter mounting position.

9. The structure of the fast-slow segmented control rotary knife arm according to claim 1, characterized in that the decelerating hydraulic cylinder further comprises an elastic member for restoring the piston, and the elastic member is connected to the piston and the side wall of the decelerating cylinder body.

10. The structure of the rotary cutter arm controlled by the high speed and the low speed in a segmented manner according to claim 1, characterized by further comprising an electric control system, wherein the electric control system is respectively connected with the hydraulic cylinder and the deceleration hydraulic cylinder.