Slewing device driven by double hydraulic cylinders

Abstract

A slewing device driven by double hydraulic cylinders relates to the technical field of engineering machinery and comprises a rack, a slewing bearing is mounted on the rack, a rotary table is mounted on the slewing bearing, hinge seats are mounted on the left side and the right side of the rotary table, a fixed hinge seat is mounted at the top of the rack, and a driving oil cylinder is mounted on the fixed hinge seat in a hinged manner. The slewing device driven by the double hydraulic cylinders is large in driving force, higher in impact bearing capacity and more stable in cantilever crane slewing, the phenomenon that the cantilever crane shakes due to factors such as scale side gaps and impact is reduced, and the slewing device driven by the double hydraulic cylinders is more stable in cantilever crane slewing. And the structure is simple, the maintenance is easy, and the damage risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a rotary device driven by dual hydraulic cylinders. Background Technology

[0002] In construction machinery, the structure of a robotic arm's turntable typically includes a slewing bearing, a drive unit, and a pinion gear. The slewing bearing is the core component of the turntable, bearing the weight of the lifting arm and load, and achieving horizontal rotation through the drive unit. The drive unit can be an electric motor or a hydraulic motor, transmitting power to the slewing bearing via a reducer and a pinion gear, thereby driving the turntable to rotate. However, in robotic arms that require frequent swaying and are susceptible to lateral reaction forces, factors such as lateral clearance and impact can lead to excessive swaying of the robotic arm, making it difficult to control and prone to gear wear. Figure 4 As shown, it includes 9 internal gear slewing bearing, 10 pinion, 11 reducer, 12 hydraulic motor and turntable. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a slewing device driven by dual hydraulic cylinders. It has a large driving force, stronger impact resistance, more stable boom slewing, and reduces boom swaying caused by factors such as lateral clearance and impact. Its structure is simple, easy to maintain and repair, and reduces the risk of damage. It can effectively solve the problems in the background art.

[0004] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0005] A rotary device driven by dual hydraulic cylinders includes a frame, a slewing bearing mounted on the frame, a turntable mounted on the slewing bearing, and hinge seats mounted on both the left and right sides of the turntable. A fixed hinge seat is mounted on the top of the frame, and a drive cylinder is hinged to the fixed hinge seat. The end of the cylinder rod of the drive cylinder is hinged to the hinge seat, and a hydraulic oil pipe for controlling the extension and retraction of the drive cylinder is mounted on the drive cylinder.

[0006] Furthermore, the fixed hinge seat includes a short fixed hinge seat and a long fixed hinge seat, and the driving cylinder includes a driving cylinder one and a driving cylinder two. Both the short fixed hinge seat and the long fixed hinge seat are fixed on the frame. The short fixed hinge seat is hinged to the cylinder end of the driving cylinder two, and the long fixed hinge seat is hinged to the cylinder end of the driving cylinder one. The cylinder rod ends of both the driving cylinder one and the driving cylinder two are hinged to the hinge seat.

[0007] Furthermore, the long fixed hinge seat and the cylinder end of the first driving cylinder, as well as the short fixed hinge seat and the cylinder end of the second driving cylinder, are all rotatably connected by a pin. The cylinder rod ends of the first and second driving cylinders are also rotatably connected to the hinge seat by a pin.

[0008] Furthermore, the turntable is fixed to the outer ring of the slewing bearing, and the inner ring of the slewing bearing is fixed to the frame, both by bolts.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This dual-hydraulic-cylinder driven rotary device has the following advantages:

[0010] 1. It adopts a dual-cylinder structure to replace electric motors, hydraulic motors, gears, etc. to drive the robotic arm turntable. It is applicable to scenarios where the robotic arm swing angle is small, frequent starts are required, and it is susceptible to lateral reaction forces. It has a large driving force, stronger impact resistance, and more stable boom rotation, reducing boom swaying caused by factors such as lateral clearance and impact.

[0011] 2. Its structure is simple, easy to maintain and repair, and reduces the risk of damage. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a partial structural diagram of the frame of this utility model;

[0014] Figure 3 This is a three-dimensional side view of the present invention;

[0015] Figure 4 This is a schematic diagram of the existing technology structure.

[0016] In the diagram: 1-turntable, 1.1-hinged seat, 2-slewing bearing, 3-drive cylinder one, 4-drive cylinder two, 5-frame, 5.1-short fixed hinge seat, 5.2-long fixed hinge seat, 6-pin one, 7-pin two, 8-hydraulic oil pipe. Detailed Implementation

[0017] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0018] Please see Figure 1-4 This embodiment provides a technical solution: a rotary device driven by dual hydraulic cylinders, including a frame 5, a slewing bearing 2 mounted on the frame 5, a turntable 1 mounted on the slewing bearing 2, the turntable 1 and the outer ring of the slewing bearing 2 and the inner ring of the slewing bearing 2 and the frame 5 are all fixed by bolts, and hinge seats 1.1 are mounted on both the left and right sides of the turntable 1, a fixed hinge seat is mounted on the top of the frame 5, a drive cylinder is hinged on the fixed hinge seat, the end of the cylinder rod of the drive cylinder is hinged to the hinge seat 1.1, and a hydraulic oil pipe 8 for controlling the extension and retraction of the drive cylinder is mounted on the drive cylinder.

[0019] The fixed hinge base includes a short fixed hinge base 5.1 and a long fixed hinge base 5.2. The drive cylinder includes drive cylinder one 3 and drive cylinder two 4. Both the short fixed hinge base 5.1 and the long fixed hinge base 5.2 are fixed on the frame 5. The short fixed hinge base 5.1 is hinged to the cylinder end of drive cylinder two 4, and the long fixed hinge base 5.2 is hinged to the cylinder end of drive cylinder one 3. The cylinder rod ends of drive cylinder one 3 and drive cylinder two 4 are both hinged to the hinge base 1.1. The hinges between the long fixed hinge base 5.2 and the cylinder end of drive cylinder one 3, and between the short fixed hinge base 5.1 and the cylinder end of drive cylinder two 4, are rotatably connected by pin one 6. The cylinder rod ends of drive cylinder one 3 and drive cylinder two 4 are rotatably connected to the hinge base 1.1 by pin two 7. The cylinder rod end of drive cylinder one 3 retracts... When the cylinder rod end of the second drive cylinder 4 extends, the long fixed hinge seat 5.2 and the cylinder end of the first drive cylinder 3, as well as the short fixed hinge seat 5.1 and the cylinder end of the second drive cylinder 4, are all hinged and rotated through the first pin 6. The cylinder rod ends of the first drive cylinder 3 and the second drive cylinder 4 are both rotated through the second pin 7 and the hinge seat 1.1, thereby jointly driving the turntable 1 to rotate clockwise or counterclockwise around the center of the slewing bearing 2. It adopts a double cylinder structure to replace the electric motor, hydraulic motor, gear, etc. to drive the robotic arm turntable. It is used in scenarios where the swing angle of the robotic arm is small, frequent starts are required, and it is susceptible to lateral reaction forces. It has a large driving force, stronger impact resistance, and more stable boom rotation, reducing boom swaying caused by factors such as lateral clearance and impact.

[0020] The working principle of the rotary device driven by dual hydraulic cylinders provided by this utility model is as follows: When the end of the cylinder rod of the first driving cylinder 3 retracts, the end of the cylinder rod of the second driving cylinder 4 extends. The long fixed hinge seat 5.2 and the cylinder end of the first driving cylinder 3 and the short fixed hinge seat 5.1 and the cylinder end of the second driving cylinder 4 are both hinged and rotated through the pin 6. The cylinder rod ends of the first driving cylinder 3 and the second driving cylinder 4 are both rotated through the pin 7 and the hinge seat 1.1, thereby jointly driving the turntable 1 to rotate clockwise or counterclockwise around the center of the slewing bearing 2.

[0021] It is worth noting that the components disclosed in the above embodiments are all general standard parts or parts known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. For example, a rotary connection can refer to a rotary connection through a bearing.

[0023] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A rotary device driven by dual hydraulic cylinders, comprising a frame (5), characterized in that: A slewing bearing (2) is installed on the frame (5), a turntable (1) is installed on the slewing bearing (2), and hinge seats (1.1) are installed on both the left and right sides of the turntable (1). A fixed hinge seat is installed on the top of the frame (5), and a drive cylinder is hinged on the fixed hinge seat. The end of the cylinder rod of the drive cylinder is hinged to the hinge seat (1.1). A hydraulic oil pipe (8) for controlling the extension and retraction of the cylinder is installed on the drive cylinder.

2. The rotary device driven by dual hydraulic cylinders according to claim 1, characterized in that: The fixed hinge seat includes a short fixed hinge seat (5.1) and a long fixed hinge seat (5.2). The driving cylinder includes a first driving cylinder (3) and a second driving cylinder (4). The short fixed hinge seat (5.1) and the long fixed hinge seat (5.2) are both fixed on the frame (5). The short fixed hinge seat (5.1) is hinged to the cylinder end of the second driving cylinder (4). The long fixed hinge seat (5.2) is hinged to the cylinder end of the first driving cylinder (3). The cylinder rod ends of the first driving cylinder (3) and the second driving cylinder (4) are both hinged to the hinge seat (1.1).

3. A rotary device driven by dual hydraulic cylinders according to claim 2, characterized in that: The long fixed hinge seat (5.2) and the cylinder end of the first driving cylinder (3) and the short fixed hinge seat (5.1) and the cylinder end of the second driving cylinder (4) are all rotatably connected by the first pin (6). The cylinder rod ends of the first driving cylinder (3) and the second driving cylinder (4) are rotatably connected to the hinge seat (1.1) by the second pin (7).

4. A slewing device driven by two hydraulic cylinders according to claim 1, characterized in that: The turntable (1) and the outer ring of the slewing bearing (2) are fixed together by bolts, as are the inner ring of the slewing bearing (2) and the frame (5).

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