A detachable piston rod of a precision multi-synchronous hydraulic cylinder

Abstract

The present application relates to the technical field of hydraulic cylinders, and discloses a detachable piston rod of a precision multi-joint synchronizer hydraulic cylinder, comprising a plurality of hydraulic cylinders, a plurality of oil inlets are provided between the plurality of hydraulic cylinders, the plurality of hydraulic cylinders are all threadedly connected to the oil inlets adjacent to them, the interiors of the plurality of hydraulic cylinders are all slidably connected to piston bodies, the interiors of the plurality of hydraulic cylinders are all provided with piston rods, and the plurality of piston rods are all threadedly connected to the piston bodies adjacent to them. The detachable piston rod of the precision multi-joint synchronizer hydraulic cylinder, by providing a plurality of piston rods, the plurality of piston rods are threadedly connected to the piston body together to ensure that they can be tightly combined together to form an integral movable rod, and the tightening pressure between each two small sections of the piston rod and the piston body fixes the piston body, so that the piston body and the piston rod are firmly fixed together, avoiding the problem of piston shaking or inaccurate stroke caused by the existence of gaps.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic cylinders, and in particular to a detachable piston rod of a precision multi-synchronous hydraulic cylinder. Background Art

[0002] In the field of hydraulic cylinder technology, the piston rod is a key component. Its stability and precision directly affect the working efficiency of the hydraulic cylinder. At present, most hydraulic cylinders use traditional fixed piston rods. Although they can meet basic usage requirements, they are still insufficient in high-precision and high-stability application scenarios.

[0003] The existing patent (Announcement No.: CN205918686U) discloses a non-equal volume synchronous distributor hydraulic cylinder, the oil port of the cylinder head and the two oil ports on one side of the two cylinder bodies are respectively connected to the oil return ports of three hydraulic cylinders with the same piston stroke and different action areas, the oil port at the bottom of the cylinder and the two oil ports on the other side of the two cylinder bodies are respectively connected to the oil inlet of the hydraulic cylinder, and the strokes of the three pistons in the three cylinder barrels are the same. In this utility model, the synchronization accuracy is not affected by factors such as system pressure, flow and load. Each seal is made of high-quality sealing material, so that the synchronization rate of each hydraulic cylinder is the same. The displacement sensor installed at the end of the piston rod at the cylinder head can realize servo or proportional control, so as to achieve the purpose of servo or proportional control of speed, force, position and other parameters of multiple hydraulic cylinders that need to be synchronized at the same time.

[0004] In the above document, when a key is installed, there is a slot at the corresponding position, so there is a gap between the slot and the key (otherwise it cannot be installed). If the gap is too small, it cannot be installed. If the gap is too large, the piston will have a slight shake, which will affect the stroke and the accuracy of the device. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present application provides a detachable piston rod of a precision multi-synchronous hydraulic cylinder, which has the advantages of stability, saving process steps and facilitating installation, and solves the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a detachable piston rod of a precision multi-synchronous hydraulic cylinder, comprising a plurality of hydraulic cylinders, a plurality of oil inlets are provided between the plurality of hydraulic cylinders, the plurality of hydraulic cylinders are all threadedly connected to the oil inlets adjacent to them, the interiors of the plurality of hydraulic cylinders are all slidably connected to piston bodies, the interiors of the plurality of hydraulic cylinders are all provided with piston rods, and the plurality of piston rods are all threadedly connected to the piston bodies adjacent to them.

[0007] According to the above scheme, the threaded connection between the hydraulic cylinder and the oil inlet and the threaded connection between the piston rod and the piston body facilitates installation and disassembly, thereby improving installation speed and efficiency.

[0008] Furthermore, two first sealing rings are fixedly connected to the outer surfaces of the plurality of oil inlets, and the plurality of first sealing rings are in contact with the inner wall of the hydraulic cylinder adjacent thereto.

[0009] Through the above solution, installing the first sealing ring can seal the position where the oil inlet is connected to the hydraulic cylinder, thereby preventing the hydraulic oil in the hydraulic cylinder from leaking.

[0010] Furthermore, oil inlet valves are installed on the outer surfaces of the plurality of oil inlets, and the plurality of oil inlet valves are distributed at equal distances.

[0011] Through the above scheme, the entry of hydraulic oil can be controlled by installing the oil inlet valve, and the oil inlet amount of the hydraulic oil can be controlled.

[0012] Furthermore, the inner walls of the plurality of oil inlets are fixedly connected with a second sealing ring, and the plurality of the second sealing rings are in contact with the piston rods adjacent thereto.

[0013] Through the above solution, installing the second sealing ring can seal the position where the oil inlet contacts the piston rod, thereby preventing the hydraulic oil from flowing into the hydraulic cylinder close to the oil inlet.

[0014] Furthermore, a third sealing ring is fixedly connected to the left side surfaces of the plurality of piston bodies, and the plurality of third sealing rings are in contact with the piston rods adjacent thereto.

[0015] Through the above solution, installing the third sealing ring can seal the connection between the piston rod and the piston body, preventing the hydraulic oil from flowing to the connection between the piston rod and the piston body and causing the threaded connection between the two to loosen.

[0016] Furthermore, the right sides of the multiple piston bodies are each provided with a slot, the inner walls of the multiple slots are each slidably connected to a pressure reducing ring, the inner walls of the multiple slots are each fixedly connected to an elastic buffer, and the multiple elastic buffers are each fixedly connected to the pressure reducing ring adjacent thereto.

[0017] Through the above solution, the installation of the elastic buffer and the cooperation of the pressure reducing ring can partially buffer the pressure on the right side of the piston body, thereby alleviating the pressure on the piston body.

[0018] Furthermore, a cavity is opened on the left side surface of each of the piston bodies, a buffer ring is slidably connected to the inside of each of the cavities, a damping cylinder is fixedly connected to the inner wall of each of the cavities, a sliding rod is slidably connected to the inside of each of the damping cylinders, and the other ends of each of the sliding rods are fixedly connected to the buffer ring adjacent to the same.

[0019] Through the above scheme, the cooperation of the installation slide rod and the damping cylinder can buffer the pressure on the right side of the piston, reduce the pressure on the piston body, and avoid the pressure being concentrated on the piston body and affecting the life of the piston body.

[0020] Furthermore, the right ends of the plurality of sliding rods are fixedly connected to springs, and the other ends of the plurality of springs are fixedly connected to the damping cylinders adjacent thereto.

[0021] Through the above scheme, the installed spring can assist in buffering the pressure exerted on the piston body through the deformation force of the spring, and achieve the energy absorption function by cooperating with the damping cylinder and the sliding rod.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] The detachable piston rod of the precision multi-synchronous hydraulic cylinder is provided with a plurality of piston rods, and the plurality of piston rods are threadedly connected with the piston body to ensure that they can be tightly combined together to form an integral movable rod. The tightening pressure between each two small sections of the piston rod and the piston body fixes the piston body, so that the piston body and the piston rod are firmly fixed together, avoiding the problem of piston shaking or inaccurate stroke caused by the existence of gaps. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a cross-sectional view of the overall structure of this application;

[0025] Figure 2 For this application Figure 1 A schematic diagram of the structure at A;

[0026] Figure 3 For this application Figure 1 A schematic diagram of the structure at B;

[0027] Figure 4 This is a schematic diagram of the overall structure of this application.

[0028] In the figure:

[0029] 1. Hydraulic cylinder; 2. Oil inlet; 3. Piston body; 4. Piston rod; 5. First sealing ring; 6. Oil inlet valve; 7. Second sealing ring; 8. Third sealing ring; 9. Notch; 10. Pressure reducing ring; 11. Elastic buffer; 12. Cavity; 13. Buffer ring; 14. Damping cylinder; 15. Sliding rod; 16. Spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] See also Figure 1 , Figure 4 In the embodiment, a detachable piston rod of a precision multi-link synchronizer hydraulic cylinder comprises a plurality of hydraulic cylinders 1, a plurality of oil inlets 2 are arranged between the plurality of hydraulic cylinders 1, and the plurality of hydraulic cylinders 1 are all threadedly connected to the oil inlets 2 close thereto, a piston body 3 is slidably connected to the interior of the plurality of hydraulic cylinders 1, a piston rod 4 is arranged inside the plurality of hydraulic cylinders 1, and the plurality of piston rods 4 are all threadedly connected to the piston body 3 close thereto, by setting a plurality of piston rods 4, the plurality of piston rods 4 are threadedly connected to the piston body 3 close thereto, and by arranging a plurality of piston rods 4, the plurality of piston rods 4 are threadedly connected to the piston body 3 close thereto, and can ensure that they can be tightly combined together to form an integral active rod, and the tightening pressure between each two small sections of the piston rod 4 and the piston body 3 fixes the piston body 3, so that the piston body 3 and the piston rod 4 are firmly fixed together, and the problem of piston shaking or inaccurate stroke caused by the existence of a gap is avoided, and the outer surfaces of the plurality of oil inlets 2 are fixedly connected to two first sealing rings 5, and the plurality of first sealing rings 5 ​​are in contact with the inner wall of the hydraulic cylinder 1 close thereto, and the installation of the first sealing ring 5 can seal the position where the oil inlet 2 is connected to the hydraulic cylinder 1, and prevent the hydraulic oil in the hydraulic cylinder 1 from leaking.

[0032] See also Figure 1 , Figure 2 and Figure 3 , the outer surfaces of the multiple oil inlet ports 2 are all installed with oil inlet valves 6, and the multiple oil inlet valves 6 are equidistantly distributed. By installing the oil inlet valves 6, the entry of hydraulic oil can be controlled, and the oil intake amount of the hydraulic oil can be controlled. The inner walls of the multiple oil inlet ports 2 are fixedly connected with second sealing rings 7, and the multiple second sealing rings 7 are in contact with the piston rod 4 close to them. The installation of the second sealing ring 7 can seal the contact position between the oil inlet port 2 and the piston rod 4 to prevent the hydraulic oil from flowing into the hydraulic cylinder 1 close to it. The left sides of the multiple piston bodies 3 are fixedly connected with third sealing rings 8, and the multiple third sealing rings 8 are in contact with the piston rod 4 close to them. The installation of the third sealing ring 8 can seal the connection between the piston rod 4 and the piston body 3 to prevent the hydraulic oil from flowing to the connection between the piston rod 4 and the piston body 3 and causing the threaded connection between the two to loosen.

[0033] See also Figure 1 , Figure 2 and Figure 3The right sides of the multiple piston bodies 3 are all provided with slots 9, the inner walls of the multiple slots 9 are all slidably connected with pressure relief rings 10, the inner walls of the multiple slots 9 are all fixedly connected with elastic buffers 11, and the multiple elastic buffers 11 are all fixedly connected with the pressure relief rings 10 close to them. The installation of the elastic buffers 11 and the pressure relief rings 10 can partially buffer the pressure on the right side of the piston body 3 and reduce the pressure on the piston body 3. The left sides of the multiple piston bodies 3 are all provided with cavities 12, the interiors of the multiple cavities 12 are all slidably connected with buffer rings 13, the inner walls of the multiple cavities 12 are all fixedly connected with damping cylinders 14, and the interiors of the multiple damping cylinders 14 They are all slidably connected with a slide rod 15, and the other ends of the multiple slide rods 15 are fixedly connected to the buffer ring 13 close to them. The cooperation of installing the slide rod 15 and the damping cylinder 14 can buffer the pressure on the right side of the piston, reduce the pressure on the piston body 3, and avoid the pressure concentration on the piston body 3 and affecting the life of the piston body 3. The right ends of the multiple slide rods 15 are all fixedly connected with a spring 16, and the other ends of the multiple springs 16 are fixedly connected to the damping cylinder 14 close to them. The installation of the spring 16 can assist in buffering the pressure on the piston body 3 through the deformation force of the spring 16, and complete the energy absorption function with the damping cylinder 14 and the slide rod 15.

[0034] In the present embodiment, a detachable piston rod of a precision multi-link synchronizer hydraulic cylinder is provided with a plurality of piston rods 4. The plurality of piston rods 4 are threadedly connected with a piston body (3) to ensure that they can be tightly combined together to form an integral movable rod. The tightening pressure between each two small sections of the piston rod 4 and the piston body 3 fixes the piston body 3, so that the piston body 3 and the piston rod 4 are firmly fixed together, thereby avoiding the problem of piston shaking or inaccurate stroke caused by the existence of a gap.

[0035] The working principle of the above embodiment is as follows: when assembling, multiple hydraulic cylinders 1 are threadedly connected with multiple oil inlets 2, and the piston rod 4 is threadedly connected with the piston body 3, so that the overall assembly can be completed, which is convenient and quick. By setting multiple piston rods 4, multiple piston rods 4 are threadedly connected with the piston body 3 to ensure that they can be tightly combined together to form an integral active rod. The tightening pressure between every two small sections of the piston rod 4 and the piston body 3 fixes the piston body 3, so that the piston body 3 and the piston rod 4 are firmly fixed together, avoiding the problem of piston shaking or inaccurate stroke caused by the existence of gaps. When the piston body 3 slides in the hydraulic cylinder 1, the pressure on the right side of the piston can be buffered by installing the slide rod 15 and the damping cylinder 14, reducing the pressure on the piston body 3, and avoiding the pressure from being concentrated on the piston body 3 to affect the life of the piston body 3. By installing the elastic buffer 11 and the pressure reducing ring 10, a part of the pressure on the right side of the piston body 3 can be buffered, reducing the pressure on the piston body 3, and improving the service life of the piston body 3.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A detachable piston rod of a precision multi-synchronous hydraulic cylinder, comprising a plurality of hydraulic cylinders (1), characterized in that: A plurality of oil inlets (2) are provided between the plurality of hydraulic cylinders (1); the plurality of hydraulic cylinders (1) are all threadedly connected to the oil inlets (2) adjacent thereto; the interiors of the plurality of hydraulic cylinders (1) are all slidably connected to piston bodies (3); the interiors of the plurality of hydraulic cylinders (1) are all provided with piston rods (4); and the plurality of piston rods (4) are all threadedly connected to the piston bodies (3) adjacent thereto.

2. The detachable piston rod of a precision multi-synchronous hydraulic cylinder according to claim 1 is characterized in that: Two first sealing rings (5) are fixedly connected to the outer surfaces of the plurality of oil inlets (2), and the plurality of first sealing rings (5) are in contact with the inner wall of the hydraulic cylinder (1) adjacent thereto.

3. The detachable piston rod of a precision multi-synchronous hydraulic cylinder according to claim 1 is characterized in that: An oil inlet valve (6) is installed on the outer surfaces of the plurality of oil inlets (2), and the plurality of oil inlet valves (6) are distributed at equal distances.

4. The detachable piston rod of a precision multi-synchronous hydraulic cylinder according to claim 1 is characterized in that: The inner walls of the plurality of oil inlets (2) are all fixedly connected with a second sealing ring (7), and the plurality of second sealing rings (7) are all in contact with the piston rod (4) adjacent thereto.

5. The detachable piston rod of a precision multi-synchronous hydraulic cylinder according to claim 1 is characterized in that: The left sides of the plurality of piston bodies (3) are all fixedly connected with a third sealing ring (8), and the plurality of third sealing rings (8) are all in contact with the piston rod (4) adjacent thereto.

6. The detachable piston rod of a precision multi-synchronous hydraulic cylinder according to claim 1 is characterized in that: The right sides of the plurality of piston bodies (3) are each provided with a slot (9), the inner walls of the plurality of slots (9) are each slidably connected to a pressure reducing ring (10), the inner walls of the plurality of slots (9) are each fixedly connected to an elastic buffer member (11), and the plurality of elastic buffer members (11) are each fixedly connected to the pressure reducing ring (10) adjacent thereto.

7. The detachable piston rod of a precision multi-synchronous hydraulic cylinder according to claim 1 is characterized in that: The left sides of the plurality of piston bodies (3) are each provided with a cavity (12); the interiors of the plurality of cavities (12) are each slidably connected to a buffer ring (13); the inner walls of the plurality of cavities (12) are each fixedly connected to a damping cylinder (14); the interiors of the plurality of damping cylinders (14) are each slidably connected to a sliding rod (15); and the other ends of the plurality of sliding rods (15) are each fixedly connected to the buffer ring (13) adjacent thereto.

8. The detachable piston rod of a precision multi-synchronous hydraulic cylinder according to claim 7 is characterized in that: The right ends of the plurality of sliding rods (15) are fixedly connected to a spring (16), and the other ends of the plurality of springs (16) are fixedly connected to a damping cylinder (14) adjacent thereto.

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