Rotary double-cylinder hydraulic shears with limiting mechanism

Abstract

The present application relates to a kind of rotary double-cylinder hydraulic shears with limiting mechanism, including lower frame, both sides of lower frame are equipped with articulated oil cylinder assembly and two groups of symmetrically arranged jaw arms, knife edge is installed on jaw arm, and two groups of the knife edge form scissors structure, oil cylinder assembly is articulated with corresponding jaw arm, adjustable limiting mechanism that cooperates with corresponding jaw arm is installed on the lower frame, and the limiting mechanism is used to limit jaw arm to move along its rotation axis direction;By limiting mechanism, prevent the knife from letting out when shearing, block the jaw arm and shift along the axis of rotation, improve shearing effect.And limiting mechanism adopts adjustable structure to adjust after long time use wear, keep the best use state;By rotating structure, prevent the hydraulic pipeline of oil cylinder assembly from rotating winding.

Description

Technical Field

[0001] This invention relates to a rotary double-cylinder hydraulic shear with a limiting mechanism, belonging to the technical field of shearing equipment. Background Technology

[0002] Currently, the shearing of automobiles and scrap steel mainly uses single-cylinder hydraulic shears or manual gas cutting. Single-cylinder hydraulic shears have low shearing force and poor shearing effect, and can currently only dismantle steel structures with a height of about 10 meters. Furthermore, only one side of the blade can be opened, resulting in a small opening, making it inflexible for shearing structural profiles at high altitudes. Manual gas cutting at high altitudes is inefficient and has poor safety.

[0003] Furthermore, when hydraulic shears are cutting, the rotating shears will move outwards, causing the clamp arm to shift axially along the rotating shaft, reducing the cutting effect and easily damaging the shears. Summary of the Invention

[0004] The purpose of this invention is to provide a rotary double-cylinder hydraulic shear with a limiting mechanism to solve the problem mentioned in the background art that the shear arm is prone to offset in the axial direction of the rotating shaft, which reduces the shearing effect.

[0005] The technical solution of the present invention is as follows:

[0006] A rotary double-cylinder hydraulic shear with a limiting mechanism includes a lower frame. Hinged cylinder assemblies and two symmetrically arranged clamp arms are provided on both sides of the lower frame. Blades are mounted on the clamp arms, and the two sets of blades form a shear structure. The cylinder assemblies are hinged to corresponding clamp arms. An adjustable limiting mechanism is installed on the lower frame to cooperate with the corresponding clamp arms. The limiting mechanism is used to restrict the movement of the clamp arms along their rotation axis.

[0007] Preferably, the clamp arm is rotatably connected to the lower frame via a rotating shaft.

[0008] Preferably, the lower frame edge is provided with a guard plate surrounding the pivot and / or limiting mechanism.

[0009] Preferably, the blade is detachably mounted on the clamp arm via a bolt assembly.

[0010] Preferably, the blade has a non-linear structure.

[0011] Preferably, the upper frame is connected to the top of the lower frame via a rotating assembly.

[0012] Preferably, a rotary joint is provided on the upper frame, and the hydraulic pipeline of the cylinder assembly is connected to the rotary joint.

[0013] Preferably, the limiting mechanism includes an arc-shaped tooth, a lower internal threaded component, a stop component, an upper internal threaded component, and a threaded limiting component; the arc-shaped tooth is fixed to the lower frame, the lower and upper internal threaded components are threadedly engaged with the threaded limiting component, the stop component moves along the axial direction of the threaded limiting component to engage or disengage with the arc-shaped tooth, the lower and upper internal threaded components are located on the stop component for clamping and fixing the stop component, and one end of the threaded limiting component abuts against the clamp arm.

[0014] Preferably, the outer wall of the threaded limiting member is fitted with a stop ring located between the upper internal threaded member and the stop member. The edge of the stop ring is folded to provide a limiting slot. The upper internal threaded member and the stop member are respectively provided with an upper limiting slot and a lower limiting slot that cooperate with the limiting slot.

[0015] Preferably, a lubrication channel is provided between the two ends of the threaded limiting member.

[0016] The present invention has the following beneficial effects:

[0017] A limiting mechanism prevents the blade from protruding outwards during shearing and blocks the clamp arm from shifting axially along the shaft, thus improving the shearing effect. Furthermore, the limiting mechanism is adjustable, allowing for adjustment after wear and tear from prolonged use to maintain optimal performance. A rotary joint prevents the hydraulic lines of the cylinder assembly from rotating and becoming entangled. Attached Figure Description

[0018] Figure 1 This is a three-dimensional isometric view of the present invention;

[0019] Figure 2 This is the front view of the present invention;

[0020] Figure 3 This is a schematic diagram of the mating structure of the upper frame and rotary joint of the rotating shaft of the present invention;

[0021] Figure 4 This is a schematic diagram of the limiting mechanism of the present invention;

[0022] Figure 5 for Figure 4 Explosion structure diagram;

[0023] Figure 6 This is a partial structural cross-sectional view of the limiting mechanism and the upper and lower mechanisms of the present invention.

[0024] The reference numerals in the figure are as follows:

[0025] 1. Lower frame; 2. Rotating shaft; 3. Clamping arm; 4. Blade; 5. Hydraulic cylinder assembly; 6. Rotating component; 7. Limiting mechanism; 71. Arc-shaped tooth; 72. Lower internal thread component; 73. Stop component; 731. Lower limit slot; 74. Upper internal thread component; 741. Upper limit slot; 75. Threaded limit component; 76. Stop ring; 761. Limiting part; 8. Upper frame; 9. Rotary joint; 10. Protective plate. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-6 As shown:

[0028] The lower frame 1 has hydraulic cylinder assemblies 5 (hydraulic cylinders) hinged to the left and right sides of the upper end. The lower frame 1 has front arms 3 rotatably connected to the left and right sides of the lower end via rotating shafts 2. Two sets of clamp arms 3 are symmetrically arranged. The hydraulic cylinder assembly 5 is hinged to the corresponding clamp arms 3. The rear side wall of the left clamp arm 3 is equipped with a blade 4, and the front side wall of the right clamp arm 3 is equipped with a blade 4. The two sets of blades 4 form a scissor structure for cutting workpieces.

[0029] The extension and retraction of the hydraulic cylinder assembly 5 drives the corresponding clamp arm 3 to rotate around the corresponding rotating shaft 2.

[0030] The blade 4 is detachably mounted on the clamp arm 3 by several bolt assemblies. The blade 4 can be removed for easy maintenance and replacement.

[0031] An upper frame 8 is mounted on the upper part of the lower frame 1 via a rotating assembly 6 (rotating platform). The upper frame 8 is used to mount external mechanical equipment such as excavators. Figure 3 As shown, a rotary joint 9 is installed on the upper frame 8, and the rotary joint 9 is located at the center of the rotating assembly 6; the hydraulic pipes of both sets of cylinder assemblies 5 are connected to the rotary joint 9, which is connected to an external hydraulic circuit. The lower frame 1 and the upper frame 8 achieve the horizontal rotation of the blade 4 through the rotation of the rotating assembly 6. At the same time, the rotating structure 9 prevents the hydraulic pipes of the cylinder assembly 5 from rotating and tangling during the rotation process; as shown Figure 2 As shown, the blade 4 has a non-linear structure and a similar obtuse angle structure, which is conducive to having a large enough space between the two sets of blades 4 to grip more workpieces.

[0032] like Figure 4-6As shown, the arc-shaped tooth 71 is welded and fixed to the outer wall of the lower frame 1. The remaining lower internal threaded part 72, stop part 73, upper internal threaded part 74, threaded limit part 75 and stop ring 76 are relatively movable and adjustable. The lower internal threaded part 72 (parallel to the axis of the rotating shaft 2) is rotated or fixedly connected to the lower frame 1. The lower end of the threaded limit part 75 is threadedly connected to the lower internal threaded part 72, and the lower end of the threaded limit part 75 abuts against the side wall of the clamp arm 3. The stop part 73 is sleeved on the outer wall of the threaded limit part 75. The stop part 73 can only slide along the axis of the threaded limit part 75. The stop ring 76 is sleeved on the outer wall of the threaded limit part 75. The upper internal threaded part 74 is threadedly connected to the upper end of the threaded limit part 75.

[0033] First, the lower end of the movable threaded limit member 75 abuts against the side wall of the clamp arm 3; then, the stop member 73 is adjusted and moved to engage with the arc-shaped tooth 71. At this time, the threaded limit member 75 is relatively fixed and cannot rotate under the cooperation of the stop member 73 and the arc-shaped tooth 71. Then, a set of limit locking parts 761 on the edge of the stop ring 76 is folded down and inserted into the lower limit locking groove 731, so that the stop ring 76 is fixed relative to the stop member 73. Then, the upper internal thread member 74 is rotated to approach the lower internal thread member 72. The upper internal thread member 74 and the lower internal thread member 72 cooperate to clamp the stop member 73 and the stop ring 76, preventing the stop member 73 from disengaging from the engaged arc-shaped tooth 71. Then, another set of limit locking parts 761 on the edge of the stop ring 76 is folded up and inserted into the upper limit locking groove 741, which can prevent the upper internal thread member 74 from rotating further.

[0034] Since the two sets of blades 4 are used to cut steel structures and other components, the reaction force of the steel structure pushes the two sets of blades 4 to move away from each other along the axis of the rotating shaft 4. Since the lower end of the threaded limiting member 75 abuts against the side wall of the clamp arm 3, the relative friction between the clamp arm 3 and the threaded limiting member 75 during long-term rotation can easily cause wear on the lower end of the threaded limiting member 75. This makes it impossible for the two sets of blades 4 to fit tightly together, reducing the cutting effect. Therefore, the limiting mechanism 7 is designed as an adjustable structure for easy adjustment.

[0035] Therefore, two sets of limiting mechanisms 7 are installed on the lower frame 1. The lower ends of the threaded limiting parts 75 in the two sets of limiting mechanisms 7 abut against the side wall of the clamp arm 3 respectively. The blade 4 is fixedly installed in the position of the clamp arm 3 and will not shift. The threaded limiting parts 75 are used to prevent the reverse thrust of the shearing process from causing the clamp arm 3 to shift relative to the lower frame 1 along the axis of the rotating shaft 2.

[0036] like Figure 6 As shown, a lubrication channel is provided between the two ends of the threaded limiting member 75. The user can inject lubricating oil into the lower end of the threaded limiting member 75 through the lubrication channel. The lubricating oil can reduce the friction between the threaded limiting member 75 and the clamp arm 3.

[0037] like Figure 1-2As shown, the structure of the guard plate 10 is adapted to the outer contour of the lower frame 1. The guard plate 10 is welded and fixed to the edge of the lower frame 10. The guard plate 10 surrounds the corresponding rotating shaft 2 and the limiting mechanism 7. The guard plate 10 prevents the blade 4 from colliding with the rotating shaft 2 and the limiting mechanism 7 when shearing the workpiece.

[0038] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A rotary double-cylinder hydraulic shears with a limiting mechanism, comprising a lower frame (1), an articulated oil cylinder assembly (5) arranged on both sides of the lower frame (1), and two groups of symmetrical clamping arms (3), a blade (4) is installed on each clamping arm (3), and the two groups of blades (4) form a scissor structure, the oil cylinder assembly (5) is articulated with a corresponding clamping arm (3), characterized in that: The lower rack (1) is provided with adjustable limiting mechanisms (7) matched with one-to-one pincer arms (3), which are used to limit the movement of the pincer arms (3) along the rotation axis direction thereof; ​ The limiting mechanism (7) comprises an arc-shaped tooth (71), a lower internal threaded part (72), a stopper (73), an upper internal threaded part (74) and a threaded limiting part (75); the arc-shaped tooth (71) is fixed on the lower rack (1); the lower internal threaded part (72) and the upper internal threaded part (74) are both threadedly matched with the threaded limiting part (75); the stopper (73) is moved along the axis direction of the threaded limiting part (75) to engage or disengage with the arc-shaped tooth (71); the lower internal threaded part (72) and the upper internal threaded part (74) are located on opposite sides of the stopper (73) and are used to clamp and fix the stopper (73); one end of the threaded limiting part (75) is abuttingly matched with the pincer arm (3); The threaded limiting part (75) is provided with a stopper blocking ring (76) located between the upper internal threaded part (74) and the stopper (73) on the outer wall thereof; the stopper blocking ring (76) is provided with a limiting clamping part (761) on the edge thereof; the upper internal threaded part (74) and the stopper (73) are respectively provided with an upper limiting clamping groove (741) and a lower limiting clamping groove (731) matched with the limiting clamping part (761); The stopper (73) can only slide along the axis direction of the threaded limiting part (75).

2. The rotary double cylinder hydraulic shearing with a limiting mechanism according to claim 1, characterized in that: The pincer arm (3) is rotatably connected to the lower rack (1) through a rotating shaft (2).

3. The rotary double cylinder hydraulic shearing with a limiting mechanism according to claim 2, characterized in that: The lower rack (1) is provided with a guard plate (10) surrounding the rotating shaft (2) and / or the limiting mechanism (7) on the edge thereof.

4. The rotary double cylinder hydraulic shearing with a limiting mechanism according to claim 1, characterized in that: The blade (4) is detachably installed on the pincer arm (3) through a bolt assembly.

5. The rotary double cylinder hydraulic shearing with a limiting mechanism according to claim 1, characterized in that: The blade (4) has a non-linear structure.

6. The rotary double cylinder hydraulic shearing with a limiting mechanism as claimed in claim 1, characterized in that: The upper rack (8) is connected to the lower rack (1) through a rotating assembly (6) on the top thereof.

7. A rotary double cylinder hydraulic shear with a limiting mechanism as claimed in claim 6, characterized in that: The upper rack (8) is provided with a rotating joint (9), and the hydraulic pipeline of the oil cylinder assembly (5) is connected to the rotating joint (9).

8. The rotary double cylinder hydraulic shearing with a limiting mechanism as claimed in claim 1, characterized in that: The threaded limiting part (75) is provided with a lubricating channel between the two ends thereof.

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