Driving device with heavy load falling buffering function

Abstract

The utility model relates to a driving device with a heavy load falling buffering function. The driving device comprises a double-piston-rod oil cylinder, a structural part, a sliding beam, an electric cylinder, a claw hook, a control valve set and two guide rails. The two guide rails are symmetrically arranged on the equipment box body; grabbing hooks are arranged on the guide rails in a sliding mode. A structural member and a sliding beam are respectively arranged between the rear ends of the two grapnels; an electric cylinder is hinged to the sliding beam; a double-piston-rod oil cylinder is hinged to the structural part; a cylinder body of the double-piston-rod oil cylinder is fixed at the upper ends of the two guide rails; and a control valve group is arranged on the double-piston-rod oil cylinder. The device is simple and compact in structure, efficient, safe and reliable in performance.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy-load lifting, in particular to a driving device with a heavy-load falling buffer function. Background Art

[0002] At present, there are two types of conventional lifting devices. One is hydraulic control, with a supporting hydraulic pump station and hydraulic system to complete lifting and buffering control, but the hydraulic station of this type is large in size, the pipeline layout is complicated, and the cost is high. The other is electric drive, which is mostly for light loads, but it is large in size, high in price, and difficult to arrange. Utility Model Content

[0003] The utility model mainly solves the technical problems of the prior art such as large volume and difficult layout, and proposes a driving device with heavy-load falling buffer function, which is used in cargo lifting and transportation equipment, or in working conditions where impact protection is required when the load falls at a speed limited by gravity. Compared with the traditional hydraulic lifting device, this device not only eliminates the use of a power station, but also reduces the use of pipelines, saves space, saves use costs, and can effectively control the descent speed, reduce the impact caused by the load, and operate safely and smoothly.

[0004] A driving device with heavy-load falling buffer function, which adopts an electric-hydraulic combination to perform lifting movements. When unloaded, it is driven to rise by an electric cylinder, and when loaded, it is driven to descend at a controlled speed by a control valve group.

[0005] The device is mainly composed of an electric cylinder, a double piston rod oil cylinder, a moving connection, a guide rail and a control valve group. The piston rod end of the electric cylinder and the piston rod end of the double piston rod oil cylinder are hinged on the moving connection; the moving connection includes a sliding beam, a compression spring, a grab hook and a structural part, the piston rod of the electric cylinder is hinged to the sliding beam; the piston rod of the double piston rod oil cylinder is hinged to the structural part; the sliding beam, the structural part and the grab hook are welded together; the compression spring is installed between the sliding beam and the structural part to compensate for the relative movement between the electric cylinder and the double piston rod oil cylinder.

[0006] The utility model provides a driving device with heavy-load drop buffering function, comprising: a double-piston rod oil cylinder, a structural member, a sliding beam, an electric cylinder, a grab hook, a control valve group and two guide rails;

[0007] Two guide rails are symmetrically arranged on the equipment box; a grab hook is slidably arranged on the guide rails; a structural member and a sliding beam are respectively arranged between the rear ends of the two grab hooks; an electric cylinder is hinged on the sliding beam; the cylinder body of the electric cylinder is arranged on the equipment box; a double-piston rod oil cylinder is hinged on the structural member; the cylinder body of the double-piston rod oil cylinder is fixed on the upper ends of the two guide rails;

[0008] A control valve group is arranged on the double-piston rod oil cylinder.

[0009] Furthermore, the piston rod end of the electric cylinder is connected to the sliding beam via a hinge ear at the piston rod end of the electric cylinder.

[0010] Furthermore, the piston rod end of the double-piston-rod oil cylinder is connected to the structural member through a double-piston-rod oil cylinder hinge ear.

[0011] Furthermore, the electric cylinder and the double-piston rod oil cylinder correspond in position up and down.

[0012] Furthermore, compression springs are respectively arranged between the two ends of the structural member and the two ends of the sliding beam.

[0013] Furthermore, the cylinder body of the double-piston rod oil cylinder is arranged on the upper end of the guide rail through a limit plate; the limit plate is arranged between the two guide rails.

[0014] Compared with the prior art, the driving device with heavy-load drop buffering function provided by the utility model has the following advantages:

[0015] (1) The utility model has a simple and compact appearance and occupies little space;

[0016] (2) The utility model is composed of multiple groups of one-way throttle valves and two-way electromagnetic reversing valves connected in parallel. When descending with load, the descent speed is controlled by adjusting the size of the one-way throttle valve, and the integrated control valve group and the lifting speed are controllable;

[0017] (3) The compression spring of the utility model is installed between the sliding beam and the structural member to compensate for the relative movement between the electric cylinder and the oil cylinder and has a buffering function;

[0018] (4) The system of the utility model has a redundant design and is safe and reliable;

[0019] (5) The utility model has fewer pipeline connections and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0022] Figure 3 It is a schematic diagram of the motion of the utility model;

[0023] Figure 4 This is a schematic diagram of the hydraulic principle of the utility model;

[0024] Figure numerals: 1. Guide rail; 2. Double-piston rod oil cylinder; 3. Structural member; 4. Sliding beam; 5. Compression spring; 6. Electric cylinder; 7. Double-piston rod oil cylinder hinge ear; 8. Electric cylinder piston rod end hinge ear; 9. Grab hook; 10. Control valve group; 11. Oil cylinder upper chamber; 12. Oil cylinder lower chamber; 13. First one-way throttle valve; 14. Second one-way throttle valve; 15. Two-way electromagnetic reversing valve. DETAILED DESCRIPTION

[0025] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the sake of ease of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of the contents.

[0026] like Figure 1-3 As shown, the embodiment of the utility model provides a driving device with heavy-load drop buffering function, including: a double-piston rod oil cylinder 2, a structural member 3, a sliding beam 4, an electric cylinder 6, a grab hook 9, a control valve group 10 and two guide rails 1;

[0027] Two guide rails 1 are symmetrically arranged on the equipment box, and two guide rails 1 are symmetrically arranged on both sides of the box; a grab hook 9 is slidably arranged on the guide rail 1; a structural member 3 and a sliding beam 4 are respectively arranged between the rear ends of the two grab hooks 9; the structural member 3 is located at the upper end of the sliding beam 4; the two ends of the structural member 3 are respectively connected to the rear ends of the two grab hooks 9. The two ends of the sliding beam 4 are respectively connected to the rear ends of the two grab hooks 9. The electric cylinder 6 is hinged on the sliding beam 4; the cylinder body of the electric cylinder 6 is arranged at the tail of the equipment box; the piston rod end of the electric cylinder 6 is hinged to the sliding beam 4 through the hinge ear 8 of the electric cylinder piston rod end. The electric cylinder 6 corresponds to the double piston rod oil cylinder 2 in the upper and lower positions.

[0028] The double piston rod oil cylinder 2 is hinged on the structural member 3; the cylinder body of the double piston rod oil cylinder 2 is fixed on the upper ends of the two guide rails 1; the cylinder body of the double piston rod oil cylinder 2 is arranged on the upper ends of the guide rails 1 through a limit plate; the limit plate is arranged between the two guide rails. The piston rod end of the double piston rod oil cylinder 2 is hinged to the structural member 3 through the double piston rod oil cylinder hinge ear 7; the structural member 3 connects the sliding beam 4, the electric cylinder 6 and the hinge ear 7 and the grab hook 9 of the double piston rod oil cylinder as a whole to form a movable connecting member, which performs lifting and lowering movements along the guide rail 1. The sliding beam 4, the structural member 3 and the grab hook 9 are welded as a whole and slide on the guide rail 1. Compression springs 5 ​​are respectively arranged between the two ends of the structural member 3 and the two ends of the sliding beam 4; the compression spring 5 is installed between the sliding beam 4 and the structural member 3 to compensate for the relative movement between the electric cylinder and the oil cylinder.

[0029] The two volume chambers of the double piston rod oil cylinder 2 are connected by a steel pipe and are provided with a control valve group 10. The control valve group 10 is composed of one-way throttle valves 13, 14 and a two-way electromagnetic reversing valve 15 in parallel. The control valve group 10 is used to control the falling speed of the heavy object and the load retention, and to control the running speed of the double piston rod oil cylinder. The unloaded lifting of the grab hook 9 is driven by the electric cylinder, and the loaded falling is regulated by the control valve group, and the compression spring 5 is used to compensate for the relative movement. The control valve group 10 includes: two valve group units arranged in parallel, each valve group unit includes: a first one-way throttle valve 13, a second one-way throttle valve 14 and two two-way electromagnetic reversing valves 15; the first one-way throttle valve 13 and the second one-way throttle valve 14 are arranged in parallel; the two ends of the first one-way throttle valve 13 and the second one-way throttle valve 14 are respectively arranged in series with the two-way electromagnetic reversing valve 15. The first one-way throttle valve 13 controls the load falling speed, runs smoothly, and reduces impact; the two-way electromagnetic reversing valve 15 is redundantly controlled.

[0030] Working process of the utility model: a. No-load lifting: This device pushes the sliding connection composed of sliding beam 4, structural member 3 and grab hook 9 welded together by the extension of electric cylinder 6 to drive the load to rise along the guide rail 1, and simultaneously drives the piston rod of double piston rod oil cylinder 2 to move upward. The relative movement between the electric cylinder and the piston rod of double piston rod oil cylinder 2 is compensated by compression spring 5. At this time, the oil in the upper chamber 11 of double piston rod oil cylinder 2 flows to the lower chamber 12 of double piston rod oil cylinder through check valve 13. The oil cylinder is in follow-up state, and the lifting speed is controlled by the electric cylinder.

[0031] b. Descending with load: When the grab hook 9 is loaded, the sliding connection composed of the sliding beam 4, the structural member 3 and the grab hook 9 welded together descends along the guide rail 1 due to the action of gravity, and simultaneously drives the piston rod of the double piston rod oil cylinder 2 and the piston rod of the electric cylinder 6 to move downward. The relative movement between the electric cylinder and the piston rod of the double piston rod oil cylinder 2 is compensated by the compression spring 5. At this time, the oil in the lower chamber 12 of the double piston rod oil cylinder returns to the upper chamber 11 of the oil cylinder through the damping hole 14, and the back pressure is increased by throttling to resist the load gravity, so as to achieve the purpose of smooth lowering. The descending speed can be controlled by adjusting the size of the damping hole 14.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that modifying the technical solutions recorded in the aforementioned embodiments, or replacing part or all of the technical features therein by equivalents, does not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A driving device with heavy-load drop buffering function, characterized in that: include: It is composed of a double piston rod oil cylinder (2), a structural member (3), a sliding beam (4), an electric cylinder (6), a grab hook (9), a control valve group (10) and two guide rails (1); Two guide rails (1) are symmetrically arranged on the equipment box; a grab hook (9) is slidably arranged on the guide rail (1); a structural member (3) and a sliding beam (4) are respectively arranged between the rear ends of the two grab hooks (9); an electric cylinder (6) is hinged on the sliding beam (4); a double-piston rod oil cylinder (2) is hinged on the structural member (3); the cylinder body of the double-piston rod oil cylinder (2) is fixed on the upper ends of the two guide rails (1); A control valve group (10) is arranged on the double-piston rod oil cylinder (2).

2. The driving device with heavy-load drop buffering function according to claim 1, characterized in that: The piston rod end of the electric cylinder (6) is connected to the sliding beam (4) via an electric cylinder piston rod end hinge ear (8).

3. The driving device with heavy-load drop buffering function according to claim 1, characterized in that: The piston rod end of the double-piston-rod oil cylinder (2) is connected to the structural member (3) via a double-piston-rod oil cylinder hinge ear (7).

4. The driving device with heavy-load drop buffering function according to claim 1, characterized in that: The electric cylinder (6) and the double-piston rod oil cylinder (2) correspond in position up and down.

5. The driving device with heavy-load drop buffering function according to claim 1, characterized in that: Compression springs (5) are respectively arranged between the two ends of the structural member (3) and the two ends of the sliding beam (4).

6. The driving device with heavy-load drop buffering function according to claim 1, characterized in that: The cylinder body of the double-piston rod oil cylinder (2) is arranged on the upper end of the guide rail (1) via a limit plate; the limit plate is arranged between the two guide rails.

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