A device with active lifting and automatic damping delivery

Abstract

The present invention relates to a device with active lifting and automatic damping delivery, comprising a primary suspension, an upper connecting rod, a primary left rocker arm, a primary right rocker arm, a secondary left rocker arm, a secondary right rocker arm, a secondary suspension, a lower connecting rod and an electro-hydraulic actuator. The electro-hydraulic actuator is connected with the primary left rocker arm and the primary right rocker arm. The connecting rod mechanism realizes the up and down movement of the secondary suspension through the extension and contraction of the piston rod of the electro-hydraulic actuator and under the constraints of the primary left rocker arm, the primary left rocker arm, the primary right rocker arm, the secondary left rocker arm and the secondary right rocker arm. The constraint of the secondary left rocker arm and the secondary right rocker arm by the lower connecting rod ensures that the secondary suspension is always in a horizontal state. The damper on the electro-hydraulic actuator can limit the hydraulic pressure from descending too fast and can perform damping and deceleration when the load is delivered. The connecting rod device has a simple structure and is safe and reliable.

Description

Technical Field

[0001] The invention relates to the field of connecting rod mechanisms, and in particular to a device with active lifting and automatic damping delivery. Background Art

[0002] The most basic and widely used type of planar linkage is the planar four-bar linkage consisting of four components. Since most of the components in the mechanism are rod-shaped, the rod-shaped components are often called rods. The lower pair is in surface contact and wear-resistant; plus the contact surfaces of the rotating pair and the moving pair are cylindrical and flat, which is easy to manufacture and easy to obtain high manufacturing accuracy. The linkage is widely used in various machinery and instruments.

[0003] The usual four-bar linkage can only achieve horizontal lateral movement, and cannot keep the connecting rod or suspension in a horizontal state during vertical movement; the traditional purely mechanized lifting device has large fluctuations and is unstable during lifting and lowering, which can easily cause the lifting device to fail. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a safe and reliable six-link device that can actively lift and automatically damp suspended objects.

[0005] The object of the present invention is achieved by the following technical scheme: a device with active lifting and automatic damping delivery, comprising a primary suspension, an upper connecting rod, a primary left rocker arm, a primary right rocker arm, a secondary left rocker arm, a secondary right rocker arm, a secondary suspension, a lower connecting rod and an electro-hydraulic actuator; wherein:

[0006] The heads of the first-level left rocker arm, the first-level right rocker arm, the second-level left rocker arm and the second-level right rocker arm are all bent structures, the turning point on the bending structure of the first-level left rocker arm is movably connected to one end of the first-level suspension, and the turning point on the bending structure of the first-level right rocker arm is movably connected to the other end of the first-level suspension; the two ends of the upper connecting rod are respectively movably connected to the bending edges of the first-level left rocker arm and the bending edges of the first-level right rocker arm; the waists of the first-level left rocker arm and the first-level right rocker arm are respectively movably connected to the two ends of the electro-hydraulic actuator; the tail of the first-level left rocker arm is movably connected to the tail of the second-level left rocker arm; the tail of the first-level right rocker arm is movably connected to the tail of the second-level right rocker arm; the turning points on the bending structure of the second-level left rocker arm and the turning points of the bending structure of the second-level right rocker arm are respectively movably connected to the two ends of the second-level suspension; the bending edges of the second-level left rocker arm and the bending edges of the second-level right rocker arm are respectively movably connected to the two ends of the lower connecting rod.

[0007] Preferably, the electro-hydraulic actuator includes a piston rod and a piston chamber, one end of the piston rod is movably connected to the first-stage left rocker arm, and the other end of the piston rod is buried in the piston chamber and slidably connected to the piston chamber; the piston chamber is movably connected to the first-stage right rocker arm.

[0008] Preferably, the connection between the first-level left rocker arm and the first-level suspension is at the same horizontal position as the connection between the first-level right rocker arm and the first-level suspension.

[0009] Preferably, the connection between the secondary left rocker arm and the secondary suspension is at the same horizontal position as the connection between the secondary right rocker arm and the secondary suspension, and the constraint of the secondary left rocker arm and the secondary right rocker arm by the lower connecting rod ensures that the secondary suspension is always in a horizontal state.

[0010] Preferably, the electro-hydraulic actuator is provided with a damper to limit excessively rapid hydraulic pressure.

[0011] The present invention has the following advantages:

[0012] 1. Six-link mechanism ensures that the secondary suspension can move up and down under the constraint of the link mechanism;

[0013] 2. The secondary suspension can always be in a horizontal state under the constraint of the rocker arm by the lower link;

[0014] 3. The damper on the electro-hydraulic actuator limits the rapid drop of hydraulic pressure and can provide damping and deceleration when the load is released. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a device with active lifting and automatic damping delivery;

[0016] Figure 2 It is a schematic diagram of the recovery of the present invention;

[0017] In the figure: 1-first-stage left rocker arm; 2-piston rod; 3-upper connecting rod; 4-first-stage suspension; 5-piston chamber; 6-first-stage right rocker arm; 7-second-stage right rocker arm; 8-lower connecting rod; 9-second-stage suspension; 10-second-stage left rocker arm. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0019] like Figure 1 and Figure 2As shown, a device with active lifting and automatic damping delivery comprises a primary suspension 4, an upper connecting rod 3, a primary left rocker arm 1, a primary right rocker arm 6, a secondary left rocker arm 10, a secondary right rocker arm 7, a secondary suspension 9, a lower connecting rod 8 and an electro-hydraulic actuator; the heads of the primary left rocker arm 1, the primary right rocker arm 6, the secondary left rocker arm 10 and the secondary right rocker arm 7 are all bent structures, the turning point on the bent structure of the primary left rocker arm 1 is movably connected to one end of the primary suspension 4, and the turning point on the bent structure of the primary right rocker arm 6 is movably connected to the other end of the primary suspension 4; the two ends of the upper connecting rod 3 are respectively connected to the primary left The bending edge of the rocker arm 1 is movably connected to the bending edge of the first-level right rocker arm 6; the waists of the first-level left rocker arm 1 and the first-level right rocker arm 6 are movably connected to the two ends of the electro-hydraulic actuator respectively; the tail of the first-level left rocker arm 1 is movably connected to the tail of the second-level left rocker arm 10; the tail of the first-level right rocker arm 6 is movably connected to the tail of the second-level right rocker arm 7; the turning point on the bending structure of the second-level left rocker arm 10 and the turning point of the bending structure of the second-level right rocker arm 7 are respectively movably connected to the two ends of the second-level suspension 9; the bending edge of the second-level left rocker arm 10 and the bending edge of the second-level right rocker arm 7 are respectively movably connected to the two ends of the lower connecting rod 8.

[0020] Preferably, the electro-hydraulic actuator includes a piston rod 2 and a piston chamber 5, one end of the piston rod 2 is movably connected to the first-stage left rocker arm 1, and the other end of the piston rod 2 is buried in the piston chamber 5 and slidably connected to the piston chamber 5; the piston chamber 5 is movably connected to the first-stage right rocker arm 6.

[0021] Preferably, the connection between the first-level left rocker arm 1 and the first-level suspension 4 and the connection between the first-level right rocker arm 6 and the first-level suspension 4 are at the same horizontal position.

[0022] Preferably, the connection between the secondary left rocker arm 10 and the secondary suspension 9 is at the same horizontal position as the connection between the secondary right rocker arm 7 and the secondary suspension 9, and the constraint of the secondary left rocker arm 10 and the secondary right rocker arm 7 by the lower connecting rod 8 ensures that the secondary suspension 9 is always in a horizontal state.

[0023] Preferably, the electro-hydraulic actuator is provided with a damper to limit excessively rapid hydraulic pressure.

[0024] Preferably, all the movable connections are rotatable hinges.

[0025] The working process of the device with active lifting and automatic damping delivery of the present invention is as follows: when lowering without load, the electro-hydraulic actuator is in the longest stretching state, the hook of the primary suspension 4 is unlocked, the piston rod 2 of the electro-hydraulic actuator is retracted, and the secondary suspension 9 unit is lowered downward through the six-bar mechanism until the piston rod 2 of the electro-hydraulic actuator is completely retracted; when actively lifting with load, the electro-hydraulic actuator keeps the secondary suspension 9 at the lowest position through the six-bar mechanism, and when the suspended object is hung on the secondary suspension 9, the piston rod 2 of the electro-hydraulic actuator is retracted, and the secondary suspension 9 unit is lifted up through the six-bar mechanism for recovery, and the electro-hydraulic actuator is in the longest extension state after being recovered; when automatically damping delivery with load, the hook of the primary suspension 4 is unlocked, the rodless cavity of the electro-hydraulic actuator quickly discharges oil under the action of external force, the piston rod 2 is quickly retracted, and the secondary suspension 9 is lowered. During the lowering process, the damper on the electro-hydraulic actuator automatically performs damping and deceleration. At the end of deployment, the hook of the secondary suspension 9 is unlocked, and the external object is separated.

Claims

1. A device with active lifting and automatic damping delivery, characterized in that: It comprises a primary suspension (4), an upper connecting rod (3), a primary left rocker arm (1), a primary right rocker arm (6), a secondary left rocker arm (10), a secondary right rocker arm (7), a secondary suspension (9), a lower connecting rod (8) and an electro-hydraulic actuator; wherein: The heads of the first-level left rocker arm (1), the first-level right rocker arm (6), the second-level left rocker arm (10) and the second-level right rocker arm (7) are all bent structures; the turning point on the bent structure of the first-level left rocker arm (1) is movably connected to one end of the first-level suspension (4), and the turning point on the bent structure of the first-level right rocker arm (6) is movably connected to the other end of the first-level suspension (4); the two ends of the upper connecting rod (3) are movably connected to the bent edges of the first-level left rocker arm (1) and the bent edges of the first-level right rocker arm (6) respectively; the first-level left rocker arm (1) and the first-level right rocker arm (6) are The waist is movably connected to the two ends of the electro-hydraulic actuator respectively; the tail of the first-level left rocker arm (1) is movably connected to the tail of the second-level left rocker arm (10); the tail of the first-level right rocker arm (6) is movably connected to the tail of the second-level right rocker arm (7); the turning point on the bending structure of the second-level left rocker arm (10) and the turning point of the bending structure of the second-level right rocker arm (7) are movably connected to the two ends of the second-level suspension (9); the bending edge of the second-level left rocker arm (10) and the bending edge of the second-level right rocker arm (7) are movably connected to the two ends of the lower connecting rod (8); The electro-hydraulic actuator comprises a piston rod (2) and a piston chamber (5); one end of the piston rod (2) is movably connected to the primary left rocker arm (1); the other end of the piston rod (2) is buried in the piston chamber (5) and is slidably connected to the piston chamber (5); the piston chamber (5) is movably connected to the primary right rocker arm (6); A damper is arranged on the electro-hydraulic actuator.

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