High-reliability reinforcement hydraulic cylinder

Abstract

The utility model relates to the technical field of hydraulic cylinders, in particular to a high-reliability reinforcement hydraulic cylinder. According to the technical scheme, the device comprises a fixed seat, and two supporting plates which are symmetrically arranged are fixedly mounted at the top of the fixed seat; the oil pressure reducing assembly comprises a partition pipe, a small load area, a large load area, a one-way valve and a piston piece, the partition pipe divides the interior of the oil cylinder pipe into the small load area and the large load area, the one-way valve is fixedly installed at the position, close to the end, of a pipe body of the partition pipe, and the piston piece slides in the small load area; the two ends of the one-way valve are communicated with the small load area and the large load area respectively. When the external load of the hydraulic cylinder is large, the oil pressure of the small load area in the partition pipe is increased, the one-way valve is opened by the hydraulic oil pressure, the hydraulic oil in the small load area flows to the large load area through the one-way valve, the oil pressure of the small load area in the partition pipe is reduced, and the hydraulic cylinder is prevented from being damaged due to the fact that the hydraulic oil in the small load area is too large.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a high-reliability force-enhancing hydraulic cylinder. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy through linear reciprocating motion (or swinging motion). It can cause relative displacement between the piston or plunger and the cylinder body through liquid pressure. Hydraulic cylinders have the advantages of simple structure, reliable operation, smooth movement, and large output force. They are widely used in industrial production and mechanical equipment.

[0003] In the prior art, liquid is injected into a hydraulic cylinder, and the liquid pressure is used to move a piston, and the piston pushes a push rod to apply a thrust to an object.

[0004] However, when this type of hydraulic cylinder is in use, the external load it pushes becomes larger in a short period of time, the oil pressure in the hydraulic cylinder increases, and the force of the oil pressure squeezing the hydraulic cylinder is too large, which may cause damage to the hydraulic cylinder. Utility Model Content

[0005] The utility model aims to propose a high-reliability force-enhancing hydraulic cylinder to solve the problem in the background technology that the hydraulic cylinder is damaged due to the increased oil pressure in the hydraulic cylinder.

[0006] The technical solution of the utility model is: a high-reliability force-increasing hydraulic cylinder, comprising:

[0007] A fixed seat, wherein two symmetrically arranged support plates are fixedly installed on the top of the fixed seat, and an oil cylinder pipe is fixedly installed between the two support plates;

[0008] The oil pressure reducing assembly comprises a partition pipe, a small load area, a large load area, a one-way valve and a piston member. The partition pipe divides the interior of the oil cylinder pipe into a small load area and a large load area. The one-way valve is fixedly installed near the end of the partition pipe. The piston member slides in the small load area. Both ends of the one-way valve are connected to the small load area and the large load area respectively.

[0009] One end of the partition pipe is fixedly installed on the inner wall of the end of the oil cylinder pipe, and an oil filling pipe is fixedly installed on the pipe body of the partition pipe near the end.

[0010] Optionally, there is a distance between the other end of the partition pipe and the cylinder tube, the middle part of the oil filling pipe is fixedly connected to the cylinder tube, hydraulic oil flows inside the small load area, and the hydraulic oil inside the small load area flows unidirectionally to the large load area through a one-way valve.

[0011] Optionally, the piston member includes a plunger and a push rod, the plunger slides in a small load area of ​​the inner wall of the partition pipe, and the push rod is fixedly installed at the center of the end of the plunger.

[0012] Optionally, the hydraulic oil pressure in the small load area is normal, there is hydraulic oil in the small load area, the one-way valve is in a closed state, and there is no hydraulic oil in the large load area; when the hydraulic oil pressure in the small load area is too high, the one-way valve is in a conducting state, and there is hydraulic oil in both the small load area and the large load area.

[0013] Optionally, a force amplification component is also included, which includes an annular piston and a fixed plate. The annular piston slides in a large load area, the fixed plate is fixedly installed on the end of the annular piston, and the center of the fixed plate is fixedly connected to the plunger.

[0014] Optionally, the inner wall of the annular piston is slidably connected to the partition pipe, and the outer wall of the annular piston is slidably connected to the cylinder pipe.

[0015] Optionally, the push rod passes through the end of the cylinder tube, and a load collar is fixedly mounted on the end of the push rod.

[0016] Compared with the prior art, the utility model has the following beneficial technical effects:

[0017] When the load outside the hydraulic cylinder is large, the oil pressure in the small load area in the partition pipe increases. At this time, the hydraulic oil pressure opens the one-way valve, so that the hydraulic oil inside the small load area flows to the large load area in one direction through the one-way valve, reducing the oil pressure in the small load area in the partition pipe, and preventing the hydraulic cylinder from being damaged due to excessive hydraulic oil in the small load area.

[0018] Furthermore, when the external load of the hydraulic cylinder is large, the hydraulic oil pressure in the small load area is too large, and the hydraulic oil is introduced into the large load area through the one-way valve. The annular piston and the plunger form a large piston under the connection of the fixed plate. The large piston is simultaneously subjected to the pressure of the hydraulic oil in the small load area and the large load area to push the external load. By increasing the piston area, the thrust is increased and the oil pressure is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall structure of an embodiment of the utility model is given;

[0020] Figure 2 A schematic cross-sectional view of the oil cylinder tube structure of an embodiment of the utility model is given;

[0021] Figure 3 A schematic cross-sectional view of a partition pipe structure of an embodiment of the utility model is given;

[0022] Figure 4 Given Figure 3 A part of the one-way valve structure is an enlarged schematic diagram.

[0023] Figure numerals: 1. fixing seat; 2. cylinder tube; 3. oil filling pipe; 4. oil pressure reducing assembly; 41. partition pipe; 42. small load area; 43. large load area; 44. one-way valve; 45. plunger; 46. push rod; 5. force amplifying assembly; 51. annular piston; 52. fixing plate; 6. load collar; 7. support plate. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Example 1

[0030] This embodiment provides a high reliability force-increasing hydraulic cylinder, such as Figure 1As shown, it comprises a fixing seat 1, two symmetrically arranged supporting plates 7 are fixedly installed on the top of the fixing seat 1, and a cylinder tube 2 is fixedly installed between the two supporting plates 7;

[0031] like Figure 2 and 3 As shown, an oil pressure reducing assembly 4 is arranged inside the oil cylinder tube 2, and the oil pressure reducing assembly 4 includes a partition pipe 41, a small load area 42, a large load area 43, a one-way valve 44 and a piston member. One end of the partition pipe 41 is fixedly installed on the inner wall of the end of the oil cylinder tube 2, and there is a spacing between the other end of the partition pipe 41 and the oil cylinder tube 2, and the spacing is used for the sliding of the piston member.

[0032] The middle part of the oil filling pipe 3 is fixedly connected to the cylinder pipe 2 , and the end of the oil filling pipe 3 is fixedly installed near the end of the pipe body of the partition pipe 41 , and the hydraulic oil is transported to the inside of the oil pressure reducing assembly 4 through the oil filling pipe 3 .

[0033] like Figure 4 As shown, the partition pipe 41 divides the interior of the cylinder tube 2 into a small load area 42 and a large load area 43. A one-way valve 44 is fixedly installed on the tube body of the partition pipe 41 near the end position. The piston slides in the small load area 42. The two ends of the one-way valve 44 are respectively connected to the small load area 42 and the large load area 43. Hydraulic oil is added to the small load area 42 in the partition pipe 41 through the oil filling pipe 3, and the hydraulic oil is used to push the piston to move.

[0034] When the external load pushed by the piston increases in a short time, the oil pressure in the small load area 42 in the partition pipe 41 increases. At this time, the hydraulic oil pressure opens the one-way valve 44, so that the hydraulic oil inside the small load area 42 flows unidirectionally through the one-way valve 44 to the large load area 43, reducing the oil pressure in the small load area 42 in the partition pipe 41.

[0035] When the hydraulic oil pressure in the small load area 42 is normal, there is hydraulic oil in the small load area 42, the one-way valve 44 is in a closed state, and there is no hydraulic oil in the large load area 43; when the hydraulic oil pressure in the small load area 42 is too high.

[0036] like Figure 3 As shown, the piston member includes a plunger 45 and a push rod 46. The plunger 45 slides in the small load area 42 of the inner wall of the partition tube 41. The push rod 46 is fixedly installed at the center of the end of the plunger 45. The push rod 46 passes through the end of the cylinder tube 2. The load collar 6 is fixedly installed at the end of the push rod 46. The hydraulic oil in the small load area 42 inside the partition tube 41 pushes the plunger 45 to move the push rod 46, thereby applying thrust to the load collar 6.

[0037] In this embodiment, the oil pressure in the small load area 42 in the partition pipe 41 increases. At this time, the hydraulic oil pressure opens the one-way valve 44, so that the hydraulic oil inside the small load area 42 flows unidirectionally to the large load area 43 through the one-way valve 44, reducing the oil pressure in the small load area 42 in the partition pipe 41, preventing the hydraulic cylinder from being damaged due to excessive hydraulic oil in the small load area 42.

[0038] Example 2

[0039] Based on Example 1, this embodiment proposes a high-reliability force-increasing hydraulic cylinder, such as Figure 3 As shown, the force-increasing assembly 5 includes an annular piston 51 and a fixed plate 52. The annular piston 51 slides in the large load area 43. The fixed plate 52 is fixedly mounted on the end of the annular piston 51, and the center of the fixed plate 52 is fixedly connected to the plunger 45. The hydraulic oil introduced from the small load area 42 into the large load area 43 pushes the annular piston 51. At this time, the annular piston 51 and the plunger 45 form a large piston under the connection of the fixed plate 52 to increase the piston area, increase the thrust and reduce the oil pressure.

[0040] like Figure 3 As shown, the inner wall of the annular piston 51 is slidably connected to the partition pipe 41, and the outer wall of the annular piston 51 is slidably connected to the oil cylinder pipe 2. The annular piston 51 is blocked between the partition pipe 41 and the oil cylinder pipe 2 to prevent leakage of hydraulic oil.

[0041] When the load outside the hydraulic cylinder is small, the hydraulic oil is transported into the small load area 42 to quickly push the plunger 45 and the push rod 46, so that the push rod 46 is quickly extended; when the load outside the hydraulic cylinder is large, the hydraulic oil pressure in the small load area 42 is too high, and the hydraulic oil is introduced into the large load area 43 through the one-way valve 44 to increase the thrust and reduce the oil pressure.

[0042] In this embodiment, when the external load is small, the push rod 46 is quickly extended by delivering hydraulic oil to the small load area 42; when the external load of the hydraulic cylinder is large, the hydraulic oil pressure in the small load area 42 is too large, and the hydraulic oil is introduced into the large load area 43 through the one-way valve 44. The annular piston 51 and the plunger 45 form a large piston under the connection of the fixed plate 52. The large piston is simultaneously subjected to the pressure of the hydraulic oil in the small load area 42 and the large load area 43 to push the external load. By increasing the piston area, the thrust is increased and the oil pressure is reduced.

[0043] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A high reliability force-boosting hydraulic cylinder, characterized in that: include: A fixed seat (1), wherein two symmetrically arranged support plates (7) are fixedly mounted on the top of the fixed seat (1), and an oil cylinder tube (2) is fixedly mounted between the two support plates (7); An oil pressure reducing assembly (4) comprises a partition pipe (41), a small load area (42), a large load area (43), a one-way valve (44) and a piston member, wherein the partition pipe (41) divides the interior of the oil cylinder pipe (2) into a small load area (42) and a large load area (43), a one-way valve (44) is fixedly installed on the pipe body of the partition pipe (41) and near the end position, the piston member slides in the small load area (42), and two ends of the one-way valve (44) are respectively connected to the small load area (42) and the large load area (43); One end of the partition pipe (41) is fixedly mounted on the inner wall of the end of the oil cylinder pipe (2), and an oil injection pipe (3) is fixedly mounted on the pipe body of the partition pipe (41) near the end.

2. A high reliability force booster hydraulic cylinder according to claim 1, characterized in that: There is a distance between the other end of the partition pipe (41) and the oil cylinder pipe (2), the middle part of the oil injection pipe (3) is fixedly connected to the oil cylinder pipe (2), hydraulic oil flows inside the small load area (42), and the hydraulic oil inside the small load area (42) flows in one direction to the large load area (43) through a one-way valve (44).

3. A high reliability force booster hydraulic cylinder according to claim 1, characterized in that: The piston member comprises a plunger (45) and a push rod (46). The plunger (45) slides at a small load area (42) of the inner wall of the partition tube (41), and the push rod (46) is fixedly installed at the center of the end of the plunger (45).

4. A high reliability force booster hydraulic cylinder according to claim 1, characterized in that: When the hydraulic oil pressure in the small load area (42) is normal, there is hydraulic oil in the small load area (42), the one-way valve (44) is in a closed state, and there is no hydraulic oil in the large load area (43); when the hydraulic oil pressure in the small load area (42) is too high, the one-way valve (44) is in an open state, and there is hydraulic oil in both the small load area (42) and the large load area (43).

5. The high reliability force-boosting hydraulic cylinder according to claim 3, characterized in that: The invention also comprises a force amplifying assembly (5), wherein the force amplifying assembly (5) comprises an annular piston (51) and a fixing plate (52), wherein the annular piston (51) slides in the large load area (43), the fixing plate (52) is fixedly mounted on the end of the annular piston (51), and the center of the fixing plate (52) is fixedly connected to the plunger (45).

6. A high reliability force booster hydraulic cylinder according to claim 5, characterized in that: The inner wall of the annular piston (51) is slidably connected to the partition pipe (41), and the outer wall of the annular piston (51) is slidably connected to the cylinder pipe (2).

7. A high reliability force booster hydraulic cylinder according to claim 6, characterized in that: The push rod (46) passes through the end of the oil cylinder tube (2), and the end of the push rod (46) is fixedly mounted with a load collar (6).

Images