Invertable air bag hydraulic oil tank capable of automatically balancing atmosphere

Abstract

The utility model relates to the technical field of hydraulic oil tanks, in particular to an air bag hydraulic oil tank capable of being inverted and automatically balancing the atmosphere. In order to solve the problems that hydraulic oil possibly leaks from a communication position when an oil tank is directly communicated with the atmosphere, and meanwhile, the hydraulic oil cannot be continuously sucked after the oil tank is turned over, so that a hydraulic system stops working, the following technical scheme is provided: the oil tank comprises a hollow box body for containing the hydraulic oil, and the box body is polygonal; the hydraulic oil pump and the reversing valve are respectively connected with the box body through pipelines, a one-way valve is further arranged on the pipeline between the hydraulic oil pump and the reversing valve, and the reversing valve is connected with an oil cylinder through a pipeline; and the atmosphere communicating pipe is arranged at the top of the box body in a penetrating manner. According to the utility model, hydraulic oil is prevented from flowing out when the box body is overturned while the air pressure inside and outside the box body is balanced without influencing the oil suction of the hydraulic oil pump, so that the stable work of a hydraulic system is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil tanks, in particular to an air bag hydraulic oil tank which can be inverted and automatically balance the atmosphere. Background Art

[0002] Due to the structural characteristics of the oil cylinder, that is, the volume of the cavity at both ends of the piston rod is different, the volume of hydraulic oil in the oil cylinder is different when the oil cylinder is extended and retracted. When the oil cylinder is extended, the volume of hydraulic oil that the oil pump needs to pump to the oil cylinder is greater than the volume of hydraulic oil that the oil pump needs to pump to the oil cylinder when it is retracted, resulting in different amounts of hydraulic oil remaining in the oil tank. The traditional solution is to not fill the oil tank with hydraulic oil, leaving a margin to buffer the volume change of hydraulic oil in the hydraulic oil tank.

[0003] At the same time, in order to facilitate the oil pump to pump oil, the traditional hydraulic oil tank is directly connected to the atmosphere (when the oil pump is working without being connected to the atmosphere, the oil pump oil inlet absorbs the hydraulic oil in the oil tank, which will form a negative pressure and cause the oil pumping to be not smooth). Direct connection will cause another problem, that is, when the oil tank is turned over, the hydraulic oil will leak out at the position where the oil tank is connected to the atmosphere, and the hydraulic oil will flow to the upper part of the original oil tank, resulting in the oil inlet not contacting the hydraulic oil, so that the hydraulic oil can no longer be absorbed, causing the hydraulic system to stop working. In view of this, the utility model proposes an inverted and automatically balanced airbag hydraulic oil tank. Utility Model Content

[0004] The purpose of the utility model is to propose an invertible and automatically atmosphere-balanced airbag hydraulic oil tank to address the problem in the background technology that a direct connection between an oil tank and the atmosphere may cause leakage of hydraulic oil at the connection position, and that the oil tank cannot continue to absorb hydraulic oil after being turned over, causing the hydraulic system to stop working.

[0005] The technical solution of the utility model is as follows: an invertible and automatically atmosphere-balancing airbag hydraulic oil tank comprises a hollow box body for containing hydraulic oil, the box body being polygonal in shape; a hydraulic oil pump and a reversing valve respectively connected to the box body through pipelines, a one-way valve is further arranged on the pipeline between the hydraulic oil pump and the reversing valve, the reversing valve is connected to an oil cylinder through a pipeline; an atmosphere connecting pipe is passed through the top of the box body, one end of the atmosphere connecting pipe is connected to an airbag arranged in the box body.

[0006] Optionally, an oil outlet pipe is installed at the bottom of the box, and an oil return pipe also installed at the bottom of the box is provided on one side of the oil outlet pipe. The oil outlet pipe and the oil return pipe are both connected to the interior of the box. The oil outlet pipe is connected to the reversing valve through a pipeline, and the oil return pipe is connected to the hydraulic oil pump through a pipeline.

[0007] Optionally, a refueling pipe installed on the top of the box body is also provided on one side of the atmosphere connecting pipe, the refueling pipe is connected to the inside of the box body, and a sealing bolt is threadedly connected in the refueling pipe.

[0008] Optionally, a squeeze assembly is included to prevent the airbag from expanding during oil changes.

[0009] Optionally, the extrusion assembly includes a fixed block, a limit plate, a gear ring, a first gear, and a rotating shaft. Multiple groups of fixed blocks are distributed in a ring array and fixedly installed on the top wall of the box. The bottom of each group of fixed blocks is fixedly connected to the limit plate. The gear ring is sleeved and installed on the outer rings of the multiple groups of fixed blocks. The first gear is arranged on one side of the gear ring and meshes with it. A rotating shaft is fixedly connected to the first gear. The rotating shaft is rotatably connected to the top of the box, and the upper half of the rotating shaft is prismatic.

[0010] Optionally, the extrusion assembly also includes a second gear, a connecting rod, a positioning seat, a threaded rod, and a first fixed plate. Multiple groups of second gears are arranged on the outer ring of the gear ring and distributed in a ring array. The second gear is meshed with the gear ring. A connecting rod is fixedly connected to the second gear. Multiple groups of positioning seats installed on the inner wall of the box are rotatably connected to the connecting rod. One end of the connecting rod is fixedly connected to the threaded rod. The end of the threaded rod away from the connecting rod is rotatably connected to the first fixed plate. The first fixed plate is fixedly connected to the inner wall of the box.

[0011] Optionally, the extrusion assembly also includes a moving block, a limiting rod, and a second fixed plate. The moving block is sleeved on the threaded rod and threadedly connected to the threaded rod. The moving block is slidably connected to the limiting rod, one end of the limiting rod is fixedly connected to the first fixed plate, and one end of the limiting rod away from the first fixed plate is fixedly connected to the second fixed plate, and the second fixed plate is fixedly connected to the inner wall of the box.

[0012] Optionally, the extrusion assembly also includes an extrusion plate, a clearance groove, and a support rod. The extrusion plate is provided with a clearance groove, and the extrusion plate is arranged on the outside of the moving block through the clearance groove. The extrusion plate is rotatably connected to the moving block, and multiple groups of support rods are rotatably connected between the extrusion plate and the inner wall of the box.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects:

[0014] The utility model provides an airbag. When the air pressure in the box is reduced or increased, the airbag connected to the atmosphere expands or contracts accordingly, thereby balancing the atmospheric pressure inside and outside the box without affecting the oil suction of the hydraulic oil pump. At the same time, the box can be turned over, and the hydraulic oil will not flow out due to the turning over of the box. The atmosphere and the hydraulic oil are isolated by the airbag, and no bubbles or gaps appear in the hydraulic oil, which will not affect the hydraulic oil pump from sucking the hydraulic oil, thereby ensuring the stable operation of the hydraulic system.

[0015] Further, through the arrangement of the extrusion assembly, when the rotating shaft is rotated, multiple sets of gear rings are used to drive multiple sets of second gears to rotate synchronously, thereby driving the threaded rod to rotate, and then the moving block moves upward, the extrusion plate begins to deflect and is supported by the support rod, and the support rod squeezes the airbag to prevent the airbag from over-expanding and divides the inner part of the box into two areas, thereby preventing the generation of negative pressure and facilitating the external discharge of hydraulic oil for replacement of hydraulic oil;

[0016] In summary, the utility model can balance the air pressure inside and outside the box without affecting the oil suction of the hydraulic oil pump, and prevent the hydraulic oil from flowing out when the box is turned over, thereby ensuring the stable operation of the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the oil circuit of an invertible and automatically atmospheric-balanced airbag hydraulic oil tank is given;

[0018] Figure 2 It is a schematic diagram of the structure of an airbag hydraulic oil tank which can be inverted and automatically balanced to the atmosphere;

[0019] Figure 3 is a schematic diagram of the structure of the extrusion component;

[0020] Figure 4 for Figure 3 A magnified schematic diagram of center A.

[0021] Reference numerals:

[0022] 1. Box; 2. Hydraulic oil pump; 3. Reversing valve; 4. Check valve; 5. Oil cylinder; 6. Atmospheric connecting pipe; 7. Air bag;

[0023] 11. Oil outlet pipe; 12. Oil return pipe; 13. Oil filling pipe; 14. Sealing bolt;

[0024] 8. Extrusion assembly; 801. Fixed block; 802. Limiting plate; 803. Gear ring; 804. First gear; 805. Rotating shaft; 806. Second gear; 807. Connecting rod; 808. Positioning seat; 809. Threaded rod; 810. First fixed plate; 811. Moving block; 812. Limiting rod; 813. Second fixed plate; 814. Extrusion plate; 815. Make way groove; 816. Support rod. DETAILED DESCRIPTION

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0027] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Embodiment 1

[0031] like Figure 1 and Figure 2As shown, the utility model proposes an inverted and automatically balanced air bag hydraulic oil tank, comprising a hollow box body 1 for containing hydraulic oil, the box body 1 being a polygonal setting. A hydraulic oil pump 2 and a reversing valve 3 are respectively connected to the box body 1 through pipelines, and the hydraulic oil pump 2 is used to extract the hydraulic oil in the oil cylinder 5. The reversing valve 3 is used to switch the hydraulic oil pump 2 to extract hydraulic oil in the two chambers of the oil cylinder 5. A one-way valve 4 is also arranged on the pipeline between the hydraulic oil pump 2 and the reversing valve 3 to prevent the hydraulic oil from flowing back. The reversing valve 3 is connected to the oil cylinder 5 through a pipeline, and drives the oil cylinder 5 to extend or retract when the hydraulic oil flows. An atmospheric communication pipe 6 is arranged on the top of the box body 1, and one end of the atmospheric communication pipe 6 is connected to an air bag 7 arranged in the box body 1. The air bag 7 is made of rubber. The atmospheric communication pipe 6 connects the air bag 7 to the atmosphere, so that when the pressure in the box body 1 changes, the air bag 7 expands or contracts accordingly to balance the pressure in the box body 1, and the hydraulic oil in the box body 1 will not leak.

[0032] Furthermore, an oil outlet pipe 11 is installed at the bottom of the box body 1 in the above-mentioned hydraulic oil tank, and a return oil pipe 12 which is also installed at the bottom of the box body 1 is also provided on one side of the oil outlet pipe 11. Both the oil outlet pipe 11 and the return oil pipe 12 are connected to the inside of the box body 1. The oil outlet pipe 11 is connected to the reversing valve 3 through a pipeline, and the return oil pipe 12 is connected to the hydraulic oil pump 2 through a pipeline. A refueling pipe 13 installed at the top of the box body 1 is also provided on one side of the atmosphere connecting pipe 6. The refueling pipe 13 is connected to the inside of the box body 1, so that hydraulic oil can be added to the box body 1 through the refueling pipe 13. A sealing bolt 14 is threadedly connected in the refueling pipe 13, and a sealing rubber ring is also provided between the sealing bolt 14 and the refueling pipe 13. After the sealing bolt 14 is tightened, the sealing rubber ring is squeezed to improve the sealing performance.

[0033] In this embodiment, when in use, the hydraulic oil in the box body 1 is filled up through the filling pipe 13, and the hydraulic oil pump 2 is started at the same time to exhaust the air in the hydraulic system. After the air is exhausted, the hydraulic oil pump 2 stops working. The consumed hydraulic oil is replenished until the hydraulic oil overflows from the filling pipe 13, and the filling pipe 13 is closed with the sealing bolt 14. After the hydraulic oil pump 2 is started, the reversing valve 3 is turned on, the oil cylinder 5 is pushed out, and the amount of oil sucked into the oil cylinder 5 is greater than the amount of oil discharged back to the box body 1 by the oil cylinder 5. The air pressure in the box body 1 is reduced, and the airbag 7 is connected to the atmosphere through the atmosphere connecting pipe 6. The atmosphere enters the airbag 7 through the atmosphere connecting pipe 6. At this time, the airbag 7 expands, balancing the atmospheric pressure inside and outside the box body 1, and does not affect the hydraulic oil pump 2 to absorb oil. At the same time, the box body 1 can be turned over, and the hydraulic oil will not flow out of the box body 1 due to the turning of the box body 1. At the same time, the atmosphere and the hydraulic oil are isolated by the airbag 7, and there will be no bubbles or gaps in the hydraulic oil, which will not affect the hydraulic oil pump 2 to absorb the hydraulic oil, thereby ensuring the stable operation of the hydraulic system. After the hydraulic oil pump 2 is started, the reversing valve 3 is reversed, the oil cylinder 5 is retracted, and the amount of oil sucked into the oil cylinder 5 is less than the amount of oil discharged from the oil cylinder 5 back to the box 1, and the air pressure in the box 1 will increase. At this time, the air bag 7 is connected to the atmosphere, and the excess gas is discharged into the atmosphere through the atmosphere connecting pipe 6. The air bag 7 contracts, balancing the atmospheric pressure inside and outside the box 1, and the hydraulic system discharges oil stably.

[0034] Embodiment 2

[0035] like Figure 2-4As shown, based on the first embodiment, the hydraulic oil tank further includes an extrusion assembly 8 for preventing the airbag 7 from expanding when changing oil. The extrusion assembly 8 includes a fixed block 801, a limit plate 802, a gear ring 803, a first gear 804, and a rotating shaft 805. Multiple groups of fixed blocks 801 are distributed in a ring array and fixedly installed on the top wall of the box body 1. The bottom of each group of fixed blocks 801 is fixedly connected to the limit plate 802, and the positions of the fixed blocks 801 and the limit plate 802 are fixed. The gear ring 803 is sleeved and installed on the outer ring of the multiple groups of fixed blocks 801, so that the gear ring 803 keeps rotating in place. The first gear 804 is arranged on one side of the gear ring 803 and meshes with it. When the first gear 804 rotates, it drives the gear ring 803 to rotate synchronously. The first gear 804 is fixedly connected to the rotating shaft 805. When the rotating shaft 805 rotates, it drives the first gear 804 to rotate synchronously. The rotating shaft 805 is rotatably connected to the top of the box body 1, and the rotating shaft 805 keeps rotating in place, so that the first gear 804 keeps rotating in place. The upper half of the rotating shaft 805 is prismatic, which is convenient for rotating the rotating shaft 805 with a wrench. The extrusion assembly 8 also includes a second gear 806, a connecting rod 807, a positioning seat 808, a threaded rod 809, and a first fixed plate 810. Multiple groups of second gears 806 are all arranged on the outer ring of the gear ring 803 and are distributed in a ring array. The second gear 806 is meshed with the gear ring 803, and the gear ring 803 drives multiple groups of second gears 806 to rotate synchronously when rotating. The second gear 806 is fixedly connected with a connecting rod 807, and multiple groups of positioning seats 808 installed on the inner wall of the box body 1 are rotatably connected to the connecting rod 807, so that the connecting rod 807 keeps rotating in place. One end of the connecting rod 807 is fixedly connected with a threaded rod 809, and the threaded rod 809 rotates synchronously with the second gear 806 through the connecting rod 807. The end of the threaded rod 809 away from the connecting rod 807 is rotatably connected to the first fixed plate 810, and the first fixed plate 810 is fixedly connected to the inner wall of the box body 1, so that the threaded rod 809 keeps rotating in place. The extrusion assembly 8 also includes a moving block 811, a limiting rod 812, and a second fixed plate 813. The moving block 811 sleeved and installed on the threaded rod 809 is threadedly connected to it. When the threaded rod 809 rotates, it drives the moving block 811 to move along the length direction of the threaded rod 809. The moving block 811 is slidably connected with the limiting rod 812, one end of the limiting rod 812 is fixedly connected to the first fixed plate 810, and the end of the limiting rod 812 away from the first fixed plate 810 is fixedly connected to the second fixed plate 813, and the second fixed plate 813 is fixedly connected to the inner wall of the box body 1. The position of the limiting rod 812 is fixed, and it is used to limit the moving block 811 when it moves. The extrusion assembly 8 also includes an extrusion plate 814, a clearance groove 815, and a support rod 816. The extrusion plate 814 is provided with a clearance groove 815. The extrusion plate 814 is arranged on the outside of the moving block 811 through the clearance groove 815. The extrusion plate 814 is rotatably connected to the moving block 811. When the moving block 811 moves, it drives the extrusion plate 814 to move synchronously.A plurality of support rods 816 are rotatably connected between the extrusion plate 814 and the inner wall of the box body 1. The support rods 816 are initially in an inclined state. When the extrusion plate 814 moves upward, the support rods 816 deflect and support the extrusion plate 814 at the same time, so that the bottom end of the extrusion plate 814 tilts toward the center of the box body 1, squeezing the airbag 7 to prevent the box body 1 from expanding due to the pressure and hindering the outflow of hydraulic oil.

[0036] In this embodiment, when the hydraulic oil needs to be replaced, a wrench is used to rotate the rotating shaft 805, so that the first gear 804 rotates and meshes with the gear ring 803, and the gear ring 803 drives multiple sets of second gears 806 to rotate synchronously. When the second gear 806 rotates, the threaded rod 809 is driven by the connecting rod 807 to keep rotating in place, and the threaded rod 809 drives the moving block 811 to move upward under the limiting action of the limiting rod 812 when rotating, and the extrusion plate 814 moves upward synchronously. Since the support rod 816 is rotatably connected between the extrusion plate 814 and the box body 1, when the extrusion plate 814 moves upward, the end of the support rod 816 connected to the extrusion plate 814 moves upward, but the end of the support rod 816 connected to the box body 1 is fixed, so that when the extrusion plate 814 moves upward, the support rod 816 will be driven to deflect. At the same time, the bottom end of the extrusion plate 814 tilts toward the middle position of the box body 1 and squeezes the airbag 7, and the support rod 816 supports the extrusion plate 814. At this time, the expansion range of the airbag 7 is limited, so even when the hydraulic oil in the box 1 is discharged and the pressure in the box 1 decreases, the airbag 7 will not completely contact the inner wall of the box 1 after expansion, thereby avoiding the negative pressure caused by the expansion of the airbag 7, facilitating the outflow of the hydraulic oil in the box 1 and replacing the hydraulic oil.

[0037] The above specific embodiment is only an optional embodiment of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above embodiment, those skilled in the art can make various alternative improvements and combinations to the above specific embodiment.

Claims

1. An invertible and automatically atmospheric-balanced airbag hydraulic oil tank, characterized in that: include: A hollow box (1) for containing hydraulic oil, wherein the box (1) is polygonal in shape; A hydraulic oil pump (2) and a reversing valve (3) connected to the box (1) via pipelines, respectively; a one-way valve (4) is also provided on the pipeline between the hydraulic oil pump (2) and the reversing valve (3); and the reversing valve (3) is connected to an oil cylinder (5) via a pipeline; An atmosphere communication pipe (6) is provided through the top of the box body (1), and one end of the atmosphere communication pipe (6) is connected to an air bag (7) provided in the box body (1).

2. The invertible and automatically atmosphere-balanced airbag hydraulic oil tank according to claim 1, characterized in that: An oil outlet pipe (11) is installed at the bottom of the box body (1), and an oil return pipe (12) which is also installed at the bottom of the box body (1) is also provided on one side of the oil outlet pipe (11). The oil outlet pipe (11) and the oil return pipe (12) are both connected to the interior of the box body (1). The oil outlet pipe (11) is connected to the reversing valve (3) through a pipeline, and the oil return pipe (12) is connected to the hydraulic oil pump (2) through a pipeline.

3. The invertible and automatically atmosphere-balanced airbag hydraulic oil tank according to claim 2, characterized in that: A refueling pipe (13) mounted on the top of the box body (1) is also provided on one side of the atmosphere communication pipe (6); the refueling pipe (13) is communicated with the interior of the box body (1); a sealing bolt (14) is threadedly connected in the refueling pipe (13).

4. The invertible and automatically atmosphere-balanced airbag hydraulic oil tank according to claim 1, characterized in that: It also includes a squeezing assembly (8) for preventing the air bag (7) from expanding when changing the oil.

5. The invertible and automatically atmosphere-balanced airbag hydraulic oil tank according to claim 4, characterized in that: The extrusion assembly (8) comprises a fixed block (801), a limiting plate (802), a toothed ring (803), a first gear (804), and a rotating shaft (805); a plurality of fixed blocks (801) are distributed in a ring array and fixedly mounted on the top wall of the box body (1); the bottom of each group of fixed blocks (801) is fixedly connected to the limiting plate (802); the toothed ring (803) is sleeved and mounted on the outer rings of the plurality of fixed blocks (801); the first gear (804) is arranged on one side of the toothed ring (803) and meshes with the toothed ring; a rotating shaft (805) is fixedly connected to the first gear (804); the rotating shaft (805) is rotatably connected to the top of the box body (1); and the upper half of the rotating shaft (805) is prismatic.

6. The invertible and automatically atmosphere-balanced airbag hydraulic oil tank according to claim 5, characterized in that: The extrusion assembly (8) also includes a second gear (806), a connecting rod (807), a positioning seat (808), a threaded rod (809), and a first fixed plate (810). Multiple groups of the second gears (806) are arranged on the outer ring of the gear ring (803) and are distributed in a ring array. The second gear (806) is meshed with the gear ring (803). A connecting rod (807) is fixedly connected to the second gear (806). The connecting rod (807) is rotatably connected to multiple groups of positioning seats (808) installed on the inner wall of the box body (1). One end of the connecting rod (807) is fixedly connected to the threaded rod (809). The end of the threaded rod (809) away from the connecting rod (807) is rotatably connected to the first fixed plate (810). The first fixed plate (810) is fixedly connected to the inner wall of the box body (1).

7. The invertible and automatically atmosphere-balanced airbag hydraulic oil tank according to claim 6, characterized in that: The extrusion assembly (8) further comprises a moving block (811), a limiting rod (812), and a second fixed plate (813); the moving block (811) is sleeved and mounted on the threaded rod (809) and is threadedly connected thereto; the moving block (811) is slidably connected to a limiting rod (812); one end of the limiting rod (812) is fixedly connected to the first fixed plate (810); one end of the limiting rod (812) away from the first fixed plate (810) is fixedly connected to the second fixed plate (813); and the second fixed plate (813) is fixedly connected to the inner wall of the box body (1).

8. The invertible and automatically atmosphere-balanced airbag hydraulic oil tank according to claim 7, characterized in that: The extrusion assembly (8) further comprises an extrusion plate (814), a clearance groove (815), and a support rod (816); the extrusion plate (814) is provided with a clearance groove (815); the extrusion plate (814) is arranged on the outside of the moving block (811) via the clearance groove (815); the extrusion plate (814) is rotatably connected to the moving block (811); and a plurality of support rods (816) are rotatably connected between the extrusion plate (814) and the inner wall of the box body (1).

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