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CN-118556523-B - Shearing apparatus and shearing method

CN118556523BCN 118556523 BCN118556523 BCN 118556523BCN-118556523-B

Abstract

The present disclosure relates to a shearing apparatus and a shearing method, the shearing apparatus including a bracket, a first blade, a second blade, a driving device, a reversing valve set, and a control system, the first blade being disposed on the bracket, the second blade being movably disposed on the bracket, the driving device being drivingly connected with the second blade, the driving device being configured to drive the second blade to move relative to the first blade to perform a shearing action, the reversing valve set being configured to change a driving direction of the driving device to reciprocate the second blade, the control system being configured to control the reversing valve set to reverse, and the control system being configured to cause the second blade to have a first operation mode in which a movement stroke of the second blade relative to the first blade is fixed, and a second operation mode in which a movement stroke of the second blade relative to the first blade is variable, and in which a maximum movement stroke of the second blade is less than or equal to a movement stroke of the second blade in the first operation mode.

Inventors

  • PAN WEIYUAN
  • XU DONGJING
  • DAI ZHENZHEN

Assignees

  • 江苏徐工工程机械研究院有限公司

Dates

Publication Date
20260505
Application Date
20240725

Claims (11)

  1. 1. A shearing apparatus comprising: a bracket (1); a first blade (2) arranged on the bracket (1); a second blade (3) movably provided on the holder (1); -a driving device (4) in driving connection with the second blade (3), the driving device (4) being configured to drive the second blade (3) in movement with respect to the first blade (2) to perform a shearing action; a reversing valve group (5) configured to change a driving direction of the driving device (4) to reciprocate the second blade (3), and -A control system (6) configured to control the reversing valve group (5) to reverse, and-the control system (6) is configured to cause the second blade (3) to have a first operating mode in which the movement travel of the second blade (3) relative to the first blade (2) is fixed and a second operating mode in which the movement travel of the second blade (3) relative to the first blade (2) is variable and in which the maximum movement travel of the second blade (3) is less than or equal to the movement travel of the second blade (3) in the first operating mode; The control system (6) comprises a first automatic switching mechanism configured to enable automatic switching of the second blade (3) between the first and second modes of operation, and to automatically switch the reversing valve group (5) in the second mode of operation; The driving device (4) comprises a hydraulic cylinder, the reversing valve group (5) comprises a first working position and a second working position, the first working position is provided with a first control end (51), the second working position is provided with a second control end (52), the first automatic switching mechanism comprises a first sequence valve (611) and a second sequence valve (612), an inlet of the first sequence valve (611) is connected to a connecting oil path between a first working oil port of the reversing valve group (5) and a rod cavity of the hydraulic cylinder, an outlet of the first sequence valve (611) is connected to the first control end (51), the pressure of the first control end (51) is configured to enable the reversing valve group (5) to be switched to the first working position, an inlet of the second sequence valve (612) is connected to a connecting oil path between a second working oil port of the reversing valve group (5) and a rod-free cavity of the hydraulic cylinder, an outlet of the second sequence valve (612) is connected to the second control end (52), and the pressure of the first control end (51) is configured to enable the reversing valve group (5) to be switched to the working position.
  2. 2. The shearing apparatus as claimed in claim 1, characterized in that the opening pressure of the first sequence valve (611) is greater than the pressure on the connecting oil line between the first working port of the reversing valve set (5) and the rod-like chamber of the hydraulic cylinder in the first operating mode and/or the opening pressure of the second sequence valve (612) is greater than the pressure on the connecting oil line between the second working port of the reversing valve set (5) and the rod-free chamber of the hydraulic cylinder in the first operating mode.
  3. 3. The shearing apparatus of claim 1, wherein the control system (6) further comprises a first damping valve (621) and a second damping valve (622), the first damping valve (621) being connected between the return port of the reversing valve block (5) and the first control end (51), the second damping valve (622) being connected between the return port of the reversing valve block (5) and the second control end (52).
  4. 4. The shearing apparatus as recited in claim 1, characterized in that the first operating position has a third control end (53), the second operating position has a fourth control end (54), the first operating port of the reversing valve block (5) is in communication with the fourth control end (54), the pressure of the fourth control end (54) is configured to keep the reversing valve block (5) operating in the second operating position, the second operating port of the reversing valve block (5) is in communication with the third control end (53), and the pressure of the third control end (53) is configured to keep the reversing valve block (5) operating in the first operating position.
  5. 5. The shearing apparatus as recited in claim 4, characterized in that the area of the first control end (51) acting on the first work station is larger than the area of the fourth control end (54) acting on the second work station and/or that the area of the second control end (52) acting on the second work station is larger than the area of the third control end (53) acting on the first work station.
  6. 6. A shearing apparatus as claimed in claim 1, characterized in that the control system (6) comprises a second automatic switching mechanism configured to automatically switch the reversing valve group (5) in the first operating mode.
  7. 7. A shearing apparatus as claimed in claim 6, wherein the second automatic switching mechanism comprises a moving frame (7) and a first contact member (81) and a second contact member (82) respectively provided at both ends of the moving frame (7), the moving frame (7) is connected to a driving portion of the driving device (4), the reversing valve group (5) comprises a first contact (55) and a second contact (56), the reversing valve group (5) comprises a first working position and a second working position, the driving portion moves the moving frame (7) to a position where the first contact member (81) contacts the first contact member (55), the reversing valve group (5) is switched to the first working position to extend the driving portion relative to a fixed portion of the driving device (4), and the driving portion moves the moving frame (7) to a position where the second contact member (82) contacts the second contact member (56), and the reversing valve group (5) is switched to the second working position relative to the driving portion to retract the driving device (4).
  8. 8. The shear apparatus according to claim 1, wherein the drive device (4) comprises a hydraulic cylinder, the control system (6) comprising a hydraulic pump (63) and a flow valve (64), the flow valve (64) being connected between an outlet of the hydraulic pump (63) and the reversing valve group (5), the flow valve (64) being configured to regulate the flow of hydraulic oil into the reversing valve group (5).
  9. 9. The shear apparatus according to claim 8, wherein the control system (6) further comprises a relief valve (65), the relief valve (65) being connected in parallel with the flow valve (64), the relief valve (65) being configured to limit the highest pressure of the control system (6).
  10. 10. The shearing apparatus as claimed in claim 1, characterized in that the control system (6) comprises a non-return valve (66), the non-return valve (66) being connected between the oil inlet and the oil return of the reversing valve group (5).
  11. 11. A shearing method based on the shearing apparatus of any one of claims 1 to 10, comprising: The second blade (3) operates in the first mode of operation when the shear force required to shear the object to be sheared is less than the maximum shear force that can be provided by the shearing device, and The second blade (3) operates in the second mode of operation when the shear force required to shear the object to be sheared is greater than or equal to the maximum shear force that can be provided by the shearing device.

Description

Shearing apparatus and shearing method Technical Field The disclosure relates to the technical field of engineering machinery, in particular to shearing equipment and a shearing method. Background Along with the enhancement of people's ecological environment protection consciousness, from city to rural area, the planting area of trees is wider and wider, and is standardized more and more. In order to ensure the health and orderly growth of the tree, staff can prune the tree in a specific time period. Currently, the pruning tool is a common pruning pliers, or is temporarily assembled by installing a tool bit on the top of an insulating operating rod. The pruning tool has the advantages of small working force, small working surface, high labor intensity of workers and low working efficiency. In order to solve the problems, hedge trimmers are appeared on the market, which can enlarge the working surface and improve the trimming efficiency to a certain extent. But when pruning the barrier that the bush density is great, the branch is thicker, appear easily cutting motionless, cutter tooth jamming in the branch's phenomenon, the pneumatic cylinder of hedge trimmer receives the hindrance of branch this moment and leads to the motion to pause, and the pneumatic cylinder does not move the switching-over position, can not trigger hydraulic reversing valve switch, leads to shearing operation to pause, influences the efficiency of construction, serious can harm the shear head even, reduces hedge trimmer's life. It should be noted that the information disclosed in the background section of the present disclosure is only intended to increase understanding of the general background of the present disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. The statements made above merely serve to provide background information related to the present disclosure and may not necessarily constitute prior art. Disclosure of Invention The embodiment of the disclosure provides shearing equipment and a shearing method, which can effectively improve the shearing efficiency. According to one aspect of the present disclosure, there is provided a shearing apparatus comprising: A bracket; the first blade is arranged on the bracket; a second blade movably disposed on the bracket; A drive device in driving connection with the second blade, the drive device configured to drive the second blade to move relative to the first blade to complete the shearing action; a reversing valve group configured to change a driving direction of the driving device to reciprocate the second blade, and The control system is configured to control the reversing valve to reverse, and the control system is configured to enable the second blade to have a first working mode and a second working mode, wherein the movement stroke of the second blade relative to the first blade is fixed in the first working mode, the movement stroke of the second blade relative to the first blade is variable in the second working mode, and the maximum movement stroke of the second blade is smaller than or equal to the movement stroke of the second blade in the first working mode in the second working mode. In some embodiments, the control system includes a first automatic switching mechanism configured to effect automatic switching of the second blade between the first mode of operation and the second mode of operation, and to automatically reverse the reversing valve set in the second mode of operation. In some embodiments, the drive device comprises a hydraulic cylinder, the reversing valve block comprises a first working position and a second working position, the first working position is provided with a first control end, the second working position is provided with a second control end, the first automatic switching mechanism comprises a first sequence valve and a second sequence valve, an inlet of the first sequence valve is connected to a connecting oil path between a first working oil port of the reversing valve block and a rod cavity of the hydraulic cylinder, an outlet of the first sequence valve is connected to the first control end, the pressure of the first control end is configured to enable the reversing valve block to be switched to the first working position for working, an inlet of the second sequence valve is connected to a connecting oil path between a second working oil port of the reversing valve block and a rodless cavity of the hydraulic cylinder, an outlet of the second sequence valve is connected to the second control end, and the pressure of the second control end is configured to enable the reversing valve block to be switched to the second working position for working. In some embodiments, the opening pressure of the first sequence valve is greater than the pressure on the connecting oil path between the first working port of the reversing val