Fixed type double-telescopic-oil-cylinder structure

Abstract

The fixed type double-telescopic-oil-cylinder structure comprises telescopic oil cylinders, a mounting plate and a connecting plate, the two telescopic oil cylinders are arranged between the mounting plate and the connecting plate in parallel and in the reverse direction, the extending directions of piston rods of the two telescopic oil cylinders are opposite, and the two piston rods can penetrate through the mounting plate and the connecting plate respectively to meet the long stroke requirement of a main machine; the two telescopic oil cylinders use the same oil way, one telescopic oil cylinder adopts a double-core pipe structure, a large cavity and a small cavity of the telescopic oil cylinder are respectively connected with a small cavity and a large cavity of the other telescopic oil cylinder, and oil ports are concentrated at the lug ring end of the telescopic oil cylinder adopting the double-core pipe structure; the long stroke requirement of a main engine is met, meanwhile, the stability of the telescopic oil cylinders is improved, the structure is relatively simple, the size is small, the problem that the main engine is small in space is solved, oil ports are concentrated at the earring end of one telescopic oil cylinder, and the main engine is convenient to install.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic cylinders, and in particular relates to a fixed double-telescopic oil cylinder structure. Background Art

[0002] Telescopic cylinder: The telescopic cylinder is a hydraulic actuator that adjusts the telescopic movement of the boom. Generally, the telescopic cylinder is a working condition where the rodless chamber is subjected to high pressure and the rod oil chamber is subjected to low pressure (main push condition). It is usually a thrust hydraulic cylinder.

[0003] Telescopic cylinders are a type of hydraulic cylinder commonly used in construction machinery. When working, they control the extension or retraction of the boom by extending and retracting the telescopic cylinder. For large-scale or large-tonnage machinery and equipment, telescopic cylinders generally use long strokes to meet the boom extension height requirements. At the same time, the longer the telescopic cylinder stroke, the larger the relative cylinder and rod diameters, thereby meeting the hydraulic cylinder stability requirements. Since large-scale or large-tonnage machinery and equipment now have higher requirements for lightweight and more compact overall space requirements for the main machine, increasing the long stroke requirement by increasing the cylinder and rod diameters cannot meet the main machine's needs. Using two separate telescopic cylinders would make it difficult to arrange the oil circuits. Therefore, meeting the main machine's long stroke requirements while also meeting the main machine's stability requirements and facilitating installation is crucial for the main machine.

[0004] The existing main machine uses a longer-stroke telescopic cylinder or two telescopic cylinders to meet its needs, which not only requires a large space but is also prone to poor stability and even piston rod bending. Summary of the Invention

[0005] In response to the problems existing in the above-mentioned prior art, the present invention provides a fixed double telescopic cylinder structure, comprising: a telescopic cylinder, a mounting plate, and a connecting plate. The two telescopic cylinders are arranged in parallel and in opposite directions between the mounting plate and the connecting plate, so that the piston rods of the two telescopic cylinders extend in opposite directions. The two piston rods can pass through the mounting plate and the connecting plate respectively to meet the long stroke requirement of the main machine; the two telescopic cylinders use the same oil circuit, and one of the telescopic cylinders adopts a double-core tube structure. The large cavity and the small cavity of the telescopic cylinder are respectively connected to the small cavity and the large cavity of the other telescopic cylinder, and the oil ports are concentrated at the earring end of the telescopic cylinder adopting the double-core tube structure; while meeting the long stroke requirement of the main machine, the stability of the telescopic cylinder is improved, the structure is relatively simple, and the volume is small, which solves the problem of small space of the main machine. The oil ports are concentrated at the earring end of one of the telescopic cylinders, which is convenient for installation of the main machine.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a fixed double telescopic cylinder structure, including: a telescopic cylinder, a mounting plate, and a connecting plate. The two telescopic cylinders are arranged in parallel and in opposite directions between the mounting plate and the connecting plate. The telescopic cylinder is fixedly connected to the mounting plate and the connecting plate so that the piston rods of the two telescopic cylinders extend in opposite directions, and the two piston rods pass through the mounting plate and the connecting plate respectively.

[0007] Furthermore, the rod oil chambers of the two telescopic oil cylinders are connected to each other, and the rodless chambers are connected to each other, so that they work synchronously.

[0008] Furthermore, a rod oil channel and a rodless oil channel are provided in the piston rod of one of the two telescopic cylinders, and an oil port connected to the rod oil channel and the rodless oil channel is provided on the earring at the end of the piston rod with the rod oil channel and the rodless oil channel. The rod oil channel is connected to the rod oil chamber of the telescopic cylinder, and the rodless oil channel is connected to the rodless chamber of the telescopic cylinder.

[0009] Furthermore, the piston rod in the other telescopic oil cylinder is not provided with a rod oil passage and a rodless oil passage, and two pin holes are provided on the earring at its end.

[0010] Furthermore, a flange is provided on the end of the cylinder barrel of the two telescopic cylinders where the piston rod extends out.

[0011] Furthermore, the connecting plate is connected to the bottom of a telescopic oil cylinder and to one end of a telescopic oil cylinder barrel with a flange by bolts. The center of the connection between the connecting plate and the flange of the telescopic oil cylinder is also provided with a mounting hole for the piston rod to pass through.

[0012] Furthermore, the mounting plate is connected to the bottom of a telescopic oil cylinder by welding and to one end of a telescopic oil cylinder barrel with a flange by bolts. The connection between the mounting plate and the bottom of a telescopic oil cylinder by welding is provided with a stop that cooperates with the bottom of the cylinder, and the connection between the mounting plate and the end of the telescopic oil cylinder barrel with a flange by bolts is provided with a mounting through hole for the piston rod to pass through.

[0013] Furthermore, the mounting plate is provided with folded edges all around, and each folded edge is provided with a mounting hole.

[0014] Furthermore, nylon blocks are installed on the folded edges around the mounting plate.

[0015] The beneficial effects of the present invention are: 1. Two telescopic cylinders are used and set in opposite directions, so that the two piston rods extend in opposite directions, increasing the stroke and meeting the long stroke requirements of the main machine. The structure is simple and easy to process; 2. One of the telescopic cylinders has two pin holes on its earrings, which are installed with the main machine through pins. This structure converts the connection mode from articulated to fixed, improving the stability of the hydraulic cylinder; 3. The oil passages of the two telescopic cylinders are connected in series, and the oil ports are concentrated on the piston rod earring of one of the telescopic cylinders, which is convenient for main engine installation and takes up little space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the partial cross-section of the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the present invention; Figure 3 It is a right side structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the main structure of the installation plate; Figure 5 This is a schematic diagram of the left-side structure of the mounting plate; Figure 6 This is a schematic diagram of the main structure of the connecting plate; Figure 7 It is a schematic diagram of the right side structure of the connecting plate; Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure; Figure 9 This is a schematic diagram of the structure of earring A from a top view; Figure 10 Schematic diagram of the cross-sectional structure of earring A; Figure 11 This is a schematic diagram of the main structure of earring B; Figure 12 This is a schematic diagram of the structure of earring B from the right side; Figure 13 This is a schematic diagram of the connection principle structure of telescopic cylinder A and telescopic cylinder B; In the figure: 1. Telescopic cylinder A; 11. Flange; 12. Earring A; 13. Pin hole; 14. Piston rod A; 15. Rod oil chamber; 16. Rodless oil chamber; 2. Telescopic cylinder B; 21. Earring B; 22. Piston rod B; 23. Rod oil channel; 24. Rodless oil channel; 3. Mounting plate; 31. Bolt mounting hole; 32. Mounting through hole; 33. Stopper; 34. Folded edge; 4. Connecting plate; 41. Limit hole. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention pertains. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0019] like Figures 1-13 As shown, a fixed double telescopic cylinder structure includes: a telescopic cylinder A, a telescopic cylinder B, a mounting plate, and a connecting plate. The telescopic cylinder A and the telescopic cylinder B are arranged in parallel and opposite directions between the mounting plate and the connecting plate. The telescopic cylinder A and the telescopic cylinder B are fixedly connected to the mounting plate and the connecting plate to form a stable structure. The fixed double telescopic cylinder structure makes the piston rods of the telescopic cylinder A and the telescopic cylinder B extend in opposite directions. The piston rods of the telescopic cylinder A and the telescopic cylinder B pass through the mounting plate and the connecting plate respectively. The fixed double telescopic cylinder structure is connected to the main machine through the mounting plate.

[0020] like Figure 1 、 2 As shown in Figures 11, 12, and 13, the rod oil chamber of the telescopic cylinder A is connected to the rod oil chamber of the telescopic cylinder B, and the rodless chamber of the telescopic cylinder A is connected to the rodless chamber of the telescopic cylinder B, so that they work synchronously.

[0021] Among them, the piston rod B of the telescopic cylinder B adopts a double-core tube structure, that is, a rod oil channel and a rodless oil channel are provided in the piston rod B in the telescopic cylinder B, and the earring B at the end of the piston rod B in the telescopic cylinder B is provided with an oil port connected to the rod oil channel and the rodless oil channel, which are respectively a rod oil port and a rodless oil port. The rod oil channel is connected to the rod oil chamber of the telescopic cylinder B, and the rodless oil channel is connected to the rodless chamber of the telescopic cylinder B; it is connected to the hydraulic system through the rod oil port and the rodless oil port, and is used to synchronously control the operation of the telescopic cylinder A and the telescopic cylinder B. Ear plates are provided on both sides of the earring B for fixing to the main arm.

[0022] like Figure 1 、 2 As shown in Figures 9 and 10, the piston rod A in the telescopic cylinder A is not provided with a rod oil channel and a rodless oil channel. Two pin holes are provided on the earring A at its end, and it is installed with the main machine through a pin. This structure converts the connection mode from an articulated type to a fixed type.

[0023] like Figure 1 、 2 As shown, the cylinder barrels of telescopic oil cylinders A and B are provided with a flange at the end where the piston rod extends, and the bottom of the cylinder barrel of telescopic oil cylinder A is provided with a threaded hole.

[0024] like Figure 1 、 2As shown in Figures 3, 6, 7 and 8, two groups of annularly distributed bolt mounting holes are provided on the connecting plate, one group of annularly distributed bolt mounting holes has an installation through hole for passing the piston rod in the center, the piston rod end of the telescopic cylinder B passes through the installation through hole on the connecting plate, and the flange of the telescopic cylinder B is connected to the group of annularly distributed bolt mounting holes on the connecting plate by bolts, and the other group of annularly distributed bolt mounting holes is connected to the threaded holes at the bottom of the cylinder barrel of the telescopic cylinder A by bolts. The connecting plate structure is used for main machine installation, and the ear plates on both sides of the connecting plate are fixed to the main machine arm.

[0025] like Figure 7 、 8 As shown, the connecting plate is also provided with a limiting hole that cooperates with the bottom of the telescopic oil cylinder A, which is used for positioning and limiting with the bottom of the telescopic oil cylinder A.

[0026] like Figure 1 、 2 As shown in Figures 3, 4 and 5, a group of annularly distributed bolt mounting holes are provided on the mounting plate, and a mounting through hole for passing the piston rod is provided in the center of the group of annularly distributed bolt mounting holes. The end of the piston rod of the telescopic cylinder A passes through the mounting through hole on the mounting plate, and the flange of the telescopic cylinder A is connected to the group of annularly distributed bolt mounting holes on the mounting plate by bolts. A stopper is provided on the mounting plate to match the bottom of the cylinder barrel of the telescopic cylinder B, and the bottom of the cylinder barrel of the telescopic cylinder B is welded together with the stopper on the mounting plate.

[0027] The mounting plate is provided with folded edges all around, and each folded edge is provided with two bolt mounting holes; nylon blocks are installed on the folded edges around the mounting plate to guide the main arm and increase stability.

[0028] By setting the telescopic cylinder A and telescopic cylinder B in opposite directions, the piston rod A and piston rod A are extended to both ends, which can meet the long stroke requirement of the main machine; the telescopic cylinder A and telescopic cylinder B use the same oil circuit, and the telescopic cylinder B adopts a double-core tube structure. The rod oil chamber and rodless chamber of the telescopic cylinder B are respectively connected to the rod oil chamber and rodless chamber of the telescopic cylinder A, and the oil ports are concentrated on the piston rod B earring B of the telescopic cylinder B, which is convenient for the installation of the main machine; the earring B structure adopts two pin shaft holes, which are fixed to the main machine through pin shafts. This structure transforms the connection mode from an articulated type to a fixed type, improves the end condition coefficient, and thus improves stability; in addition, the mounting plate is folded around and fixed with nylon blocks by bolts, which play a guiding role in the main machine's boom and increase stability at the same time; the fixed double telescopic cylinder structure improves the stability of the cylinder while meeting the long stroke requirement of the main machine. It has a relatively simple structure and a small size, which solves the problem of small space of the main machine. The oil ports are concentrated in the earring B, which is convenient for the installation of the main machine.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fixed double telescopic cylinder structure, characterized in that: include: A telescopic oil cylinder, a mounting plate, and a connecting plate. The two telescopic oil cylinders are arranged in parallel and in opposite directions between the mounting plate and the connecting plate. The telescopic oil cylinder is fixedly connected to the mounting plate and the connecting plate so that the piston rods of the two telescopic oil cylinders extend in opposite directions. The two piston rods pass through the mounting plate and the connecting plate respectively.

2. A fixed double telescopic cylinder structure according to claim 1, characterized in that: The rod oil chambers of the two telescopic oil cylinders are communicated with each other, and the rodless chambers are communicated with each other, so that they work synchronously.

3. A fixed double telescopic cylinder structure according to claim 2, characterized in that: In one of the two telescopic cylinders, a rod oil channel and a rodless oil channel are provided in the piston rod. The earring at the end of the piston rod with the rod oil channel and the rodless oil channel is provided with an oil port connected to the rod oil channel and the rodless oil channel. The rod oil channel is connected to the rod oil chamber of the telescopic cylinder, and the rodless oil channel is connected to the rodless chamber of the telescopic cylinder.

4. A fixed double telescopic oil cylinder structure according to claim 3, characterized in that: The piston rod in the other telescopic oil cylinder is not provided with a rod oil passage and a rodless oil passage, and the earring at the end thereof is provided with two pin holes.

5. The fixed double telescopic cylinder structure according to claim 1, characterized in that: The cylinder barrels of the two telescopic oil cylinders are provided with flanges at the ends where the piston rods extend out.

6. The fixed double telescopic cylinder structure according to claim 1, characterized in that: The connecting plate is connected to the bottom of a telescopic oil cylinder and one end of a telescopic oil cylinder barrel with a flange by bolts. The center of the connection between the connecting plate and the flange of the telescopic oil cylinder is also provided with a mounting through hole for the piston rod to pass through.

7. The fixed double telescopic cylinder structure according to claim 1, characterized in that: The mounting plate is connected to the bottom of a telescopic oil cylinder by welding and to one end of a telescopic oil cylinder barrel with a flange by bolts. The connection between the mounting plate and the bottom of a telescopic oil cylinder by welding is provided with a stop that cooperates with the bottom of the cylinder. The connection between the mounting plate and the end of the telescopic oil cylinder barrel with a flange by bolts is provided with a mounting through hole for the piston rod to pass through.

8. A fixed double telescopic oil cylinder structure according to claim 1 or 7, characterized in that: The mounting plate is provided with folded edges all around, and each folded edge is provided with a mounting hole.

9. The fixed double telescopic cylinder structure according to claim 8, characterized in that: Nylon blocks are installed on the folded edges around the mounting plate.

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