Combined hydraulic cylinder

Abstract

The utility model relates to the technical field of hydraulic cylinders, and discloses a combined type hydraulic cylinder which comprises a supporting plate and a connecting plate, cylinder bodies are fixedly connected to the top of the supporting plate and the top of the connecting plate, sealing assemblies are connected to the inner walls of the cylinder bodies in a sliding mode, piston rods are fixedly connected to the tops of the sealing assemblies, and the piston rods are fixedly connected to the connecting plate. The outer portion of the cylinder body is fixedly connected with a fixing ring, the two sides of the bottom of the fixing ring are fixedly connected with supporting columns, the two sides of the top of the fixing ring are slidably connected with shell sleeves, the inner walls of the shell sleeves are slidably connected with buffering pads, the tops of the buffering pads are fixedly connected with telescopic columns, and the telescopic columns are sleeved with first springs. According to the hydraulic cylinder, extra supporting can be provided through elastic potential energy, the stabilizing effect is improved, and therefore swinging or inclining caused by instability can be reduced, safe operation is ensured, and the service life of the hydraulic cylinder is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a combined hydraulic cylinder. Background Art

[0002] A modular hydraulic cylinder is usually composed of multiple hydraulic cylinders to achieve more complex motion control or increase output force. The design of the modular hydraulic cylinder can be selected according to the specific application requirements. A common design is a parallel combination, in which the piston rods of multiple hydraulic cylinders are connected at the same output position to increase the total output force. Another design is a series combination, in which the hydraulic cylinders are connected in sequence so that the output force can be added in sequence.

[0003] After searching, the Chinese announcement number is: CN211116926U, which is a new type of combined hydraulic cylinder. An outer driving shell is set on one side of the cylinder body, and a driving mechanism is set in the driving chamber of the outer driving shell, a No. 2 driving gear is set in the driving mechanism, and then a No. 2 piston rod is set at the end of the No. 1 piston rod away from the piston, and a thread is set on the outer side of the No. 2 piston rod, so that the No. 2 piston rod is meshed with the No. 2 driving gear, which can make the No. 2 driving gear work and drive the No. 2 piston rod to rotate and extend; by setting a No. 1 driving gear, a No. 1 gear and a No. 2 gear in the driving mechanism, setting the No. 1 gear and the No. 2 gear on the same side of the No. 1 driving gear and the No. 2 driving gear, and then connecting the No. 1 gear and the No. 2 gear through a chain, the No. 1 driving gear can rotate to drive the No. 1 gear, the chain and the No. 2 gear to move, thereby driving the No. 2 driving gear to rotate, which can further increase the extendible length range of the hydraulic cylinder.

[0004] Although the above patent can further increase the extendable length range of the hydraulic cylinder by rotating the moving gear during use, in the specific use process, the length is extended by the gears, and stability needs to be provided by the meshing between the gears, resulting in poor stable support effect, which will affect the hydraulic cylinder. In view of the above problems, a combined hydraulic cylinder is proposed. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a combined hydraulic cylinder, which aims to improve the problem in the prior art that stability is provided by meshing between gears, resulting in poor stability support effect, thus affecting the hydraulic cylinder.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A combined hydraulic cylinder comprises a support plate and a connecting plate, wherein the support plate and the top of the connecting plate are fixedly connected to a cylinder body, a sealing assembly is slidably connected to the inner wall of the cylinder body, a piston rod is fixedly connected to the top of the sealing assembly, a fixing ring is fixedly connected to the outside of the cylinder body, both sides of the bottom of the fixing ring are fixedly connected to support columns, both sides of the top of the fixing ring are slidably connected to shell sleeves, the inner wall of the shell sleeve is slidably connected to a buffer pad, the top of the buffer pad is fixedly connected to a telescopic column, the outer sleeve of the telescopic column is provided with a spring, wherein the tops of two of the telescopic columns are fixedly connected to connecting plates, and the tops of the other two telescopic columns are fixedly connected to the fixing plates, the front and rear sides of the connecting plate are provided with disassembly assemblies, and both sides of the front end of the cylinder body are provided with oil holes;

[0008] As a further description of the above technical solution:

[0009] The disassembly assembly includes two pull rods, which are respectively slidably connected to the two sides of the connecting plate, and the outer sleeve of the pull rod is provided with a spring 2, and the two sides of the pull rod are rotatably connected with a telescopic rod, and the end of the telescopic rod away from the pull rod is rotatably connected with a limiting strip, and the top four corners of the connecting plate are slidably connected with fixing bolts, and the outer part of the limiting strip is engaged with the through hole of the fixing bolt;

[0010] As a further description of the above technical solution:

[0011] One end of the spring 1 is fixedly connected to an inner wall of one side of the shell, and the other end of the spring 1 is fixedly connected to one side of the buffer pad;

[0012] As a further description of the above technical solution:

[0013] The bottom of the connecting plate fits with the bottom of the connecting plate, and the outer portion of the fixing bolt is slidably connected to the top through hole of the connecting plate;

[0014] As a further description of the above technical solution:

[0015] Each of the sealing assemblies comprises a piston, the outside of the piston is slidably connected to the inner wall of the cylinder body, the top of the piston is fixedly connected to a rubber ring, the top of the rubber ring is fixedly connected to an end cover, and the top of the piston is fixedly connected to the bottom of the piston rod;

[0016] As a further description of the above technical solution:

[0017] The two piston rods are fixedly connected to the bottom of the connecting plate and the fixing plate respectively;

[0018] As a further description of the above technical solution:

[0019] The outside of the pull rod is slidably connected to the inner wall of the connecting plate, and the outside of the limiting strip is slidably connected to the inner wall of the connecting plate;

[0020] As a further description of the above technical solution:

[0021] One end of the second spring is fixedly connected to an inner wall of one side of the connecting plate, and the other end of the second spring is fixedly connected to one side of the pull rod.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, the piston rod is moved by starting the cylinder body, and the piston rod can drive the connecting plate and the fixed plate to move during the movement, so that the telescopic column can drive the buffer pad to slide on the inner wall of the shell. At this time, the spring will be squeezed and deformed to generate elastic potential energy. The elastic potential energy can provide additional support and enhance the stability effect, thereby reducing the swaying or tilting caused by instability, thereby ensuring safe operation and improving the service life of the hydraulic cylinder.

[0024] 2. In the utility model, by pulling the pull rod, the telescopic rod can be driven to rotate under the pulling of the pull rod, thereby pulling the limiting bar to move. Under the movement of the limiting bar, the fixing bolt can be withdrawn from the through hole. At this time, the fixing bolt can be removed for disassembly, thereby completing the separation between the two cylinder bodies, and the fixing bolt is clamped by the limiting bar to complete the combination, thereby improving the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional schematic diagram of a combined hydraulic cylinder proposed by the utility model;

[0026] Figure 2 This is a structural schematic diagram of a piston rod of a combined hydraulic cylinder proposed by the utility model;

[0027] Figure 3 This is a structural schematic diagram of a piston of a combined hydraulic cylinder proposed by the utility model;

[0028] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0029] Figure 5 The utility model is a schematic structural diagram of a pull rod of a combined hydraulic cylinder.

[0030] Legend:

[0031] 1. Fixed plate; 2. Shell; 3. Pull rod; 4. Support plate; 5. Support column; 6. Oil hole; 7. Cylinder body; 8. Fixing bolt; 9. Telescopic column; 10. Piston rod; 11. Rubber ring; 12. End cover; 13. Piston; 14. Buffer pad; 15. Connecting plate; 16. Connecting plate; 17. Spring 1; 18. Telescopic rod; 19. Spring 2; 20. Limiting strip. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1 and Figure 3 The utility model provides an embodiment: a combined hydraulic cylinder, including a support plate 4 and a connecting plate 15, the tops of the support plate 4 and the connecting plate 15 are fixedly connected with a cylinder body 7, the cylinder body 7 is supported by the support plate 4 and the connecting plate 15, the inner wall of the cylinder body 7 is slidably connected with a sealing assembly, the top of the sealing assembly is fixedly connected with a piston rod 10, each sealing assembly includes a piston 13, the outer part of the piston 13 is slidably connected to the inner wall of the cylinder body 7, the top of the piston 13 is fixedly connected with a rubber ring 11, the piston 13 can be sealed by the rubber ring 11, the top of the rubber ring 11 is fixedly connected with an end cover 12, the top of the piston 13 is fixedly connected to the bottom of the piston rod 10, and the piston rod 10 can be driven to move by the cylinder body 7.

[0034] refer to Figure 2 and Figure 3 The outside of the cylinder body 7 is fixedly connected with a fixing ring, and both sides of the bottom of the fixing ring are fixedly connected with support columns 5, so that the support columns 5 can provide additional supporting force for the cylinder body 7, and both sides of the top of the fixing ring are slidably connected with a shell sleeve 2, and the inner wall of the shell sleeve 2 is slidably connected with a buffer pad 14, and the buffer pad 14 can be limited by the shell sleeve 2, and the top of the buffer pad 14 is fixedly connected with a telescopic column 9, and the outer sleeve of the telescopic column 9 is provided with a spring 17, and the spring 17 is limited by the telescopic column 9. One end of the spring 17 is fixedly connected to the inner wall of one side of the shell sleeve 2, and the other end of the spring 17 is fixedly connected to one side of the buffer pad 14. The movement of the buffer pad 14 can squeeze the spring 17 so that the spring 17 is deformed to generate elastic potential energy. Oil holes 6 are provided on both sides of the front end of the cylinder body 7, and oil is added through the oil holes 6.

[0035] refer to Figure 1The tops of the two telescopic columns 9 are fixedly connected with a connecting plate 16, and the two piston rods 10 are respectively fixedly connected to the bottom of the connecting plate 16 and the fixed plate 1. The piston rods 10 can push the connecting plate 16 and the fixed plate 1 to move. The outside of the pull rod 3 is slidably connected to the inner wall of the connecting plate 16, and the pull rod 3 can be restricted by the connecting plate 16. The tops of the other two telescopic columns 9 are fixedly connected with the fixed plate 1.

[0036] refer to Figure 1 and Figure 5 , both the front and rear sides of the connecting plate 16 are provided with disassembly components, which include two pull rods 3, which are respectively slidably connected to the two sides of the connecting plate 16, and the pull rod 3 can be restricted by the connecting plate 16. The bottom of the connecting plate 15 fits with the bottom of the connecting plate 16, and the outer sleeve of the pull rod 3 is provided with a spring 2 19, and the pull rod 3 can restrict the spring 2 19. One end of the spring 2 19 is fixedly connected to the inner wall of one side of the connecting plate 16, and the other end of the spring 2 19 is fixedly connected to one side of the pull rod 3. The spring 2 19 can be squeezed by the movement of the pull rod 3, so that the spring 2 19 is deformed to generate elastic potential energy. Both sides of the pull rod 3 are rotatably connected with telescopic rods 18, When the pull rod 3 is pulled, it can drive the telescopic rod 18 to rotate. The end of the telescopic rod 18 away from the pull rod 3 is rotatably connected to the limiting bar 20, so that the Shudie telescopic rod 18 can drive the limiting bar 20 to move when it rotates. The outside of the limiting bar 20 is slidably connected to the inner wall of the connecting plate 16, so that the limiting bar 20 can move stably. The top four corners of the connecting plate 15 are slidably connected with fixing bolts 8, and the outside of the fixing bolts 8 is slidably connected to the top through hole of the connecting plate 16. The connecting plate 15 and the connecting plate 16 can be connected by the fixing bolts 8, and the outside of the limiting bar 20 is engaged with the through hole of the fixing bolt 8, and the fixing bolt 8 is restricted by the limiting bar 20.

[0037] Working principle: When the equipment is in use, the piston rod 10 is started to drive the fixed plate 1 and the connecting plate 16 to move respectively. At this time, the telescopic column 9 will drive the buffer pad 14 to slide on the inner wall of the shell 2, so that the spring 17 can be squeezed, so that the end cover 12 is deformed to generate elastic potential energy, provide additional support, reduce the shaking of the equipment during operation, and thus improve the service life of the equipment. When the two hydraulic cylinders need to be separated, by pulling the pull rod 3, the telescopic rod 18 can be driven to rotate under the pulling of the pull rod 3. At this time, the rotation of the telescopic rod 18 can drive the limiting bar 20 to move. At this time, the limiting bar 20 withdraws from the inner wall of the fixing bolt 8 so that the fixing bolt 8 can be taken out, and the disassembly of the two hydraulic cylinders is completed. When installation is required, pull the pull rod 3, and then pass the fixing bolt 8 through the top through holes of the connecting plate 15 and the connecting plate 16 in turn, and then release the pull rod 3. At this time, the spring 2 19 can release the elastic potential energy so that the limiting bar 20 resets the through hole of the fixing bolt 8 to limit the fixing bolt 8 and prevent the fixing bolt 8 from slipping.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined hydraulic cylinder, comprising a support plate (4) and a connecting plate (15), characterized in that: The support plate (4) and the connecting plate (15) are both fixedly connected to the top of a cylinder body (7), the inner wall of the cylinder body (7) is slidably connected to a sealing assembly, the top of the sealing assembly is fixedly connected to a piston rod (10), the outside of the cylinder body (7) is fixedly connected to a fixing ring, the bottom two sides of the fixing ring are fixedly connected to support columns (5), the top two sides of the fixing ring are slidably connected to a shell (2), the inner wall of the shell (2) is slidably connected to a buffer pad (14), the top of the buffer pad (14) is fixedly connected to a telescopic column (9), the outer sleeve of the telescopic column (9) is provided with a spring 1 (17), the tops of two of the telescopic columns (9) are fixedly connected to a connecting plate (16), the tops of the other two of the telescopic columns (9) are fixedly connected to a fixing plate (1), the front and rear sides of the connecting plate (16) are provided with disassembly assemblies, and the front ends of the cylinder body (7) are provided with oil holes (6).

2. A combined hydraulic cylinder according to claim 1, characterized in that: The disassembly assembly includes two pull rods (3), and the two pull rods (3) are respectively slidably connected to the two sides of the connecting plate (16), and the outer sleeve of the pull rod (3) is provided with a spring 2 (19). Both sides of the pull rod (3) are rotatably connected with a telescopic rod (18), and one end of the telescopic rod (18) away from the pull rod (3) is rotatably connected with a limiting strip (20), and the top four corners of the connecting plate (15) are slidably connected with a fixing bolt (8), and the outer part of the limiting strip (20) is engaged with the through hole of the fixing bolt (8).

3. A combined hydraulic cylinder according to claim 1, characterized in that: One end of the spring one (17) is fixedly connected to an inner wall of one side of the shell (2), and the other end of the spring one (17) is fixedly connected to one side of the buffer pad (14).

4. A combined hydraulic cylinder according to claim 2, characterized in that: The bottom of the connecting plate (15) is fitted with the bottom of the connecting plate (16), and the outside of the fixing bolt (8) is slidably connected to the top through hole of the connecting plate (16).

5. The combined hydraulic cylinder according to claim 1, characterized in that: Each sealing assembly comprises a piston (13), the outside of the piston (13) is slidably connected to the inner wall of the cylinder body (7), the top of the piston (13) is fixedly connected to a rubber ring (11), the top of the rubber ring (11) is fixedly connected to an end cover (12), and the top of the piston (13) is fixedly connected to the bottom of the piston rod (10).

6. A combined hydraulic cylinder according to claim 1, characterized in that: The two piston rods (10) are respectively fixedly connected to the bottom of the connecting plate (16) and the fixing plate (1).

7. A combined hydraulic cylinder according to claim 2, characterized in that: The outside of the pull rod (3) is slidably connected to the inner wall of the connecting plate (16), and the outside of the limiting strip (20) is slidably connected to the inner wall of the connecting plate (16).

8. A combined hydraulic cylinder according to claim 2, characterized in that: One end of the second spring (19) is fixedly connected to an inner wall of one side of the connecting plate (16), and the other end of the second spring (19) is fixedly connected to one side of the pull rod (3).

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