Self-lubricating type hydraulic oil cylinder piston rod assembly

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, and discloses a self-lubricating type hydraulic oil cylinder piston rod assembly which comprises a front end cover, a shell is movably installed on the right side of the front end cover, a connecting pipe is movably installed on the right side of the shell, and a rear end cover is movably installed on the right side of the connecting pipe. An oil inlet pipe extending to the bottom of the shell is fixedly installed on the left side of the inner bottom wall of the shell, an oil return pipe extending to the bottom of the shell is fixedly installed on the right side of the inner bottom wall of the shell, and a piston rod set penetrating through the connecting pipe and extending to the right side of the rear end cover is arranged on the inner side of the shell. A lubricating mechanism located on the outer side of the piston rod set is arranged on the inner side of the rear end cover, a pressing mechanism is arranged on the right side of the piston rod set, and a pull ring is arranged on the right side of the pressing mechanism.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a self-lubricating hydraulic cylinder piston rod assembly. Background Technology

[0002] A search revealed Chinese Patent Publication No. CN214196826U, which discloses a piston rod mechanism for a hydraulic cylinder, including a piston rod body and a first fixed pressure block. This hydraulic cylinder piston rod mechanism is equipped with a positioning and fixing rod that allows a spring body to be fixedly mounted on the surface of a lifting lug body, thereby enabling the spring body to exert a certain force on the lifting lug body. The positioning and fixing rod is a threaded connection, facilitating the installation, disassembly, replacement, and maintenance of the entire auxiliary equipment. The existing technical solution described above has the following drawbacks: it lacks a lubrication structure, resulting in insufficient lubrication of the piston rod after prolonged use, affecting the operation of the hydraulic cylinder. Therefore, a self-lubricating hydraulic cylinder piston rod assembly is proposed to solve the aforementioned problems. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a self-lubricating hydraulic cylinder piston rod assembly, which has the advantage of having a lubrication structure and solves the problems mentioned in the background art.

[0005] (II) Technical Solution

[0006] To achieve the aforementioned purpose of providing a lubrication structure, this utility model provides the following technical solution: a self-lubricating hydraulic cylinder piston rod assembly, including a front end cover, a housing movably mounted on the right side of the front end cover, a connecting pipe movably mounted on the right side of the housing, a rear end cover movably mounted on the right side of the connecting pipe, an oil inlet pipe extending to its bottom fixedly mounted on the left side of the inner bottom wall of the housing, an oil return pipe extending to its bottom fixedly mounted on the right side of the inner bottom wall of the housing, a piston rod assembly penetrating the connecting pipe and extending to the right side of the rear end cover, a lubrication mechanism located outside the piston rod assembly on the inner side of the rear end cover, a pressing mechanism on the right side of the piston rod assembly, and a pull ring on the right side of the pressing mechanism;

[0007] The piston rod assembly includes a piston rod, a piston rod that is slidably installed on the inner side of the housing through a connecting pipe and extends to the right side of the rear end cover, a piston block that fits against the inner wall of the housing is fixedly installed on the left side of the piston rod, a sealing ring is movably installed on the outer side of the piston block, and an insert rod is fixedly installed on the left side of the piston block.

[0008] Preferably, the lubrication mechanism includes a ring body. The right side of the rear end cover has a ring body extending to its inner side. A sponge ring that fits against the outer side of the piston rod is movably installed on the inner side of the ring body. The right side of the rear end cover has an installation groove. A box body extending to the right side of the rear end cover is fixedly installed on the inner side of the installation groove. A cover body is movably installed on the right side of the inner wall of the box body. A pressure plate is slidably installed on the inner side of the box body. A connecting pipe extending to the inner side of the ring body is fixedly installed on the rear side of the inner wall of the box body. Two connecting rods extending to the right side of the cover body are fixedly installed on the right side of the pressure plate. A vertical plate is fixedly installed between the right sides of the two connecting rods. A return spring that is fixedly connected to the cover body is fixedly installed on the left side of the vertical plate.

[0009] Preferably, the pressing mechanism includes a mounting box, the mounting box is fixedly mounted on the right side of the piston rod, the pull ring is fixedly mounted on the right side of the mounting box, a crossbar is fixedly mounted on the left side of the inner wall of the mounting box, a limit hole is opened on the front side of the inner wall of the mounting box, a slot hole is opened on the inner top wall of the mounting box, a movable cylinder is slidably mounted on the right side of the crossbar, a connecting spring is fixedly mounted on the left side of the movable cylinder and fixedly connected to the inner wall of the mounting box and sleeved on the outside of the crossbar, a swing rod extending to the front side of the mounting box is rotatably connected to the right side of the movable cylinder, and a movable plate is fixedly mounted on one end of the front side of the swing rod, the movable plate being located on the right side of the vertical plate.

[0010] Preferably, the inner wall of the box body has a circular hole adapted to the connecting pipe on the rear side, the inner side of the ring body has an annular groove, and the inner wall of the ring body has a circular hole adapted to the connecting pipe on the front side.

[0011] Preferably, the cover has a through hole inside, the size of which is adapted to the connecting rod, a rubber pad is fixedly installed on the right side of the vertical plate, and there are two return springs.

[0012] Preferably, the left side of the movable cylinder has a circular groove adapted to the crossbar, and one end of the swing rod is rotatably connected to the movable cylinder through a support shaft.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the present invention provides a self-lubricating hydraulic cylinder piston rod assembly, which has the following beneficial effects:

[0015] This self-lubricating hydraulic cylinder piston rod assembly incorporates a lubrication mechanism and a pressing mechanism. The lubrication mechanism's housing stores lubricant. Initially, the pressure plate, under the action of the return spring, is positioned near the right side of the housing's inner wall. At this point, the housing contains a certain amount of lubricant, and the sponge ring also absorbs a certain amount of lubricant. The sponge ring is in contact with the outer side of the piston rod, providing initial lubrication. When the piston rod moves to a certain position to the left, the pressing mechanism activates. The moving plate, located to the right of the vertical plate, pushes the vertical plate to the left as the piston rod continues to move to the left. The vertical plate, via a connecting rod, causes the pressure plate to slide to the left within the housing, compressing the lubricant. Under pressure, the lubricant enters the inner side of the ring through a connecting pipe and further penetrates into the sponge ring, causing the sponge ring to absorb more lubricant, thus continuously providing sufficient lubricant to the piston rod. The lubrication reduces friction and wear on the piston rod during movement. When the piston rod retracts to the right, the pressure of the moving plate on the vertical plate disappears. Under the elastic force of the return spring, the vertical plate moves to the right, causing the pressure plate to slide to the right and return to its initial position within the box. At the same time, a negative pressure is formed within the box, which facilitates the smooth entry of lubricant into the box and its compression output during the next press, thus achieving the purpose of having a lubrication structure. If lubrication is not required, the moving plate can be pulled to the left, causing the swing rod to move to the left, which compresses the connecting spring and slides on the outside of the crossbar. When it can no longer move, the swing rod is rotated upwards and moved to the inside of the slot. After releasing, the swing rod moves to the right under the tension of the connecting spring. At this time, the moving plate is in the position above the mounting box. When the piston rod moves, the moving plate no longer contacts the vertical plate, thus no longer squeezing the lubricating oil, and the hydraulic cylinder can be used normally. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0017] Figure 2 This is a three-dimensional cross-sectional view of the structure of this utility model;

[0018] Figure 3 This is an exploded view of a partial structure of the present invention;

[0019] Figure 4 This is an exploded cross-sectional view of a portion of the structure of this utility model;

[0020] Figure 5 This is a partial sectional perspective view of the present invention.

[0021] In the diagram: 1. Front cover, 2. Housing, 3. Connecting pipe, 4. Rear cover, 5. Oil inlet pipe, 6. Oil return pipe, 7. Piston rod assembly, 71. Piston rod, 72. Piston block, 73. Sealing ring, 74. Insert rod, 8. Lubrication mechanism, 801. Ring body, 802. Sponge ring, 803. Mounting groove, 804. Box body, 805. Cover body, 806. Pressure plate, 807. Connecting pipe, 808. Connecting rod, 809. Vertical plate, 810. Return spring, 9. Pressing mechanism, 91. Mounting box, 92. Limiting hole, 93. Strip hole, 94. Horizontal bar, 95. Moving cylinder, 96. Connecting spring, 97. Swinging rod, 98. Moving plate, 10. Pull ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution: a self-lubricating hydraulic cylinder piston rod assembly, including a front end cover 1, a housing 2 movably mounted on the right side of the front end cover 1, a connecting pipe 3 movably mounted on the right side of the housing 2, a rear end cover 4 movably mounted on the right side of the connecting pipe 3, an oil inlet pipe 5 extending to its bottom fixedly mounted on the left side of the inner bottom wall of the housing 2, an oil return pipe 6 extending to its bottom fixedly mounted on the right side of the inner bottom wall of the housing 2, a piston rod assembly 7 penetrating the connecting pipe 3 and extending to the right side of the rear end cover 4, a lubrication mechanism 8 located outside the piston rod assembly 7 located on the inner side of the rear end cover 4, a pressing mechanism 9 located on the right side of the piston rod assembly 7, and a pull ring 10 located on the right side of the pressing mechanism 9.

[0024] The piston rod assembly 7 includes a piston rod 71. The piston rod 71, which is slidably installed on the inner side of the housing 2, passes through the connecting pipe 3 and extends to the right side of the rear end cover 4, and is the actuating component of the hydraulic cylinder. Under the action of hydraulic oil, it makes linear reciprocating motion in the housing 2 to realize the transmission of mechanical energy. It can be used to drive other mechanical equipment or complete specific work tasks. A piston block 72, which fits against the inner wall of the housing 2, is fixedly installed on the left side of the piston rod 71. A sealing ring 73 is movably installed on the outer side of the piston block 72 to play a sealing role, preventing hydraulic oil from leaking between the piston block 72 and the inner wall of the housing 2, ensuring that the hydraulic system can build up pressure normally, and improving the working efficiency and reliability of the hydraulic cylinder. A plug rod 74 is fixedly installed on the left side of the piston block 72.

[0025] The lubrication mechanism 8 includes a ring 801. A ring 801 extending to the inner side of the rear end cover 4 is fixedly installed on the right side of the ring 801. A sponge ring 802, which fits against the outer side of the piston rod 71, is movably installed on the inner side of the ring 801. This sponge ring absorbs lubricant and, when the piston rod 71 moves, applies lubricant to its surface, thus reducing friction and wear between the piston rod 71 and the rear end cover 4 and extending the equipment's service life. A mounting groove 803 is provided on the right side of the rear end cover 4. A box 804 extending to the right side of the rear end cover 4 is fixedly installed on the inner side of the mounting groove 803. A cover 805 is movably installed on the right side of the inner wall of the box 804. A pressure plate is slidably installed on the inner side of the box 804. 806. A connecting pipe 807 extending to the inner side of the ring 801 is fixedly installed on the rear side of the inner wall of the box 804. Two connecting rods 808 extending to the right side of the cover 805 are fixedly installed on the right side of the pressure plate 806. A vertical plate 809 is fixedly installed between the right sides of the two connecting rods 808. A return spring 810 fixedly connected to the cover 804 is fixedly installed on the left side of the vertical plate 809. The elastic coefficient of the return spring 810 can be set according to the requirements to provide a return force for the vertical plate 809, so that the vertical plate 809 can return to the initial position when no external force is applied. At the same time, it ensures that the lubrication mechanism 8 can return to normal state after the pressing mechanism 9 is released, ready for the next lubrication operation.

[0026] The inner wall of the box 804 has a circular hole on the rear side that matches the connecting pipe 807. The inner side of the ring 801 has an annular groove. The inner wall of the ring 801 has a circular hole on the front side that matches the connecting pipe 807. The cover 805 has a through hole inside. The size of the through hole matches the connecting rod 808. A rubber pad is fixedly installed on the right side of the vertical plate 809. There are two return springs 810.

[0027] The pressing mechanism 9 includes a mounting box 91. The mounting box 91 is fixedly mounted on the right side of the piston rod 71. The pull ring 10 is fixedly mounted on the right side of the mounting box 91. A crossbar 94 is fixedly mounted on the left side of the inner wall of the mounting box 91. A limit hole 92 is opened on the front side of the inner wall of the mounting box 91. A slot hole 93 is opened on the inner top wall of the mounting box 91. A movable cylinder 95 is slidably mounted on the right side of the crossbar 94. A connecting spring 96 is fixedly mounted on the left side of the movable cylinder 95, which is fixedly connected to the inner wall of the mounting box 91 and sleeved on the outside of the crossbar 94. The spring coefficient of spring 96 can be set according to requirements. The right side of the movable cylinder 95 is rotatably connected to a swing rod 97 extending to the front side of the mounting box 91. A movable plate 98 is fixedly installed at the front end of the swing rod 97. The movable plate 98 is located on the right side of the vertical plate 809. The rotation setting of the swing rod 97 facilitates changing the state of the movable plate 98. When the movable plate 98 is located in front of the mounting box 91, it can contact the vertical plate 809. When the movable plate 98 is located above the mounting box 91, it cannot contact the vertical plate 809 and the lubricant cannot be squeezed out.

[0028] The left side of the movable cylinder 95 is provided with a circular groove that matches the crossbar 94, and one end of the swing rod 97 is rotatably connected to the movable cylinder 95 through a support shaft.

[0029] During use, install the front cover 1, housing 2, connecting pipe 3, and rear cover 4 in sequence, ensuring tight and sealed connections between components to prevent hydraulic oil leakage. Connect the inlet pipe 5 and return pipe 6 to the corresponding pipes of the external hydraulic system, ensuring secure connections to prevent loosening that could lead to hydraulic oil leakage or unstable pressure. Add an appropriate amount of lubricant to the housing 804 of the lubrication mechanism 8 to ensure sufficient lubrication for the piston rod 71 during its movement. Start the external hydraulic system and control the flow and pressure of the hydraulic oil as needed. When piston rod 71 extends, hydraulic oil enters housing 2 from oil inlet pipe 5, pushing piston rod 71 to the right. When piston rod 71 needs to retract, hydraulic oil flows out from oil return pipe 6, causing piston rod 71 to move to the left under internal pressure and external load. During the movement of piston rod 71, lubrication mechanism 8 automatically provides lubrication to piston rod 71. When piston rod 71 moves to the right to the trigger position of pressing mechanism 9, pressing mechanism 9 pushes the pressure plate 806 of lubrication mechanism 8 to compress lubricant, thereby replenishing the lubricant supply and ensuring that piston rod 71 is always in a good lubrication state.

[0030] Regularly check the connections of each component to ensure that there are no loose connections or leaks between the front cover 1, housing 2, connecting pipe 3, and rear cover 4. Check the connection between the oil inlet pipe 5 and the oil return pipe 6 to ensure they are secure and that the pipes are not damaged or aged. Replace them promptly if necessary. Regularly check the lubricant level in the lubrication mechanism 8. When the lubricant is insufficient, add lubricant to the housing 804 in time to ensure lubrication. Check the wear of the sealing ring 73. If the sealing ring 73 is found to be damaged or aged, it should be replaced in time to prevent hydraulic oil leakage from affecting the normal operation of the hydraulic system.

[0031] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0032] In summary, this self-lubricating hydraulic cylinder piston rod assembly, through the provision of a lubrication mechanism 8 and a pressing mechanism 9, utilizes a housing 804 within the lubrication mechanism 8 to store lubricant. Initially, the pressure plate 806, under the action of the return spring 810, is positioned near the right side of the inner wall of the housing 804. At this time, the housing 804 stores a certain amount of lubricant, and the sponge ring 802 also absorbs a certain amount of lubricant. The sponge ring 802 is in contact with the outer side of the piston rod 71, providing initial lubrication for the piston rod 71. When the piston rod 71 moves to a certain position to the left, the pressing mechanism 9... Mechanism 9 begins to function. The movable plate 98 is located to the right of the vertical plate 809. As the piston rod 71 continues to move to the left, the movable plate 98 pushes the vertical plate 809 to the left. The vertical plate 809, via the connecting rod 808, causes the pressure plate 806 to slide to the left within the housing 804, compressing the lubricant inside. Under pressure, the lubricant enters the inner side of the ring 801 through the connecting pipe 807 and further penetrates into the sponge ring 802, causing the sponge ring 802 to absorb more lubricant. This continuously provides sufficient lubrication to the piston rod 71, reducing the risk of piston rod 71 failure. 1. During the movement, friction and wear occur. When the piston rod 71 retracts to the right, the pressure of the moving plate 98 on the vertical plate 809 disappears. Under the elastic force of the return spring 810, the vertical plate 809 moves to the right, causing the pressure plate 806 to slide to the right within the housing 804 and return to its initial position. At the same time, a negative pressure is formed within the housing 804, which facilitates the smooth entry of lubricant into the housing 804 and its compression and output during the next press, thus achieving the purpose of having a lubrication structure. If lubrication is not required, the moving plate 98 can be pulled to the left, causing the swing rod 97 to move to the left, thereby compressing and connecting the moving cylinder 95. Spring 96 slides on the outside of crossbar 94. When it can no longer move, rotate swing rod 97 to move it up to the inside of slot 93. After releasing, the swing rod 97 moves to the right under the tension of connecting spring 96. At this time, moving plate 98 is above mounting box 91. When piston rod 71 moves, moving plate 98 no longer contacts vertical plate 809, so the lubricating oil is no longer squeezed. The hydraulic cylinder can be used normally, which solves the problem of insufficient lubricating oil on piston rod after long-term use due to the lack of a lubrication structure, which affects the use of hydraulic cylinder.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-lubricating hydraulic cylinder piston rod assembly, comprising a front end cover (1), a housing (2) movably mounted on the right side of the front end cover (1), a connecting pipe (3) movably mounted on the right side of the housing (2), a rear end cover (4) movably mounted on the right side of the connecting pipe (3), an oil inlet pipe (5) extending to the bottom of the housing (2) fixedly mounted on the left side of the inner bottom wall, an oil return pipe (6) extending to the bottom of the housing (2) fixedly mounted on the right side of the inner bottom wall, and a piston rod assembly (7) penetrating the connecting pipe (3) and extending to the right side of the rear end cover (4) provided on the inner side of the housing (2), characterized in that: The inner side of the rear end cover (4) is provided with a lubrication mechanism (8) located outside the piston rod assembly (7), and the right side of the piston rod assembly (7) is provided with a pressing mechanism (9), and the right side of the pressing mechanism (9) is provided with a pull ring (10). The piston rod assembly (7) includes a piston rod (71). A piston rod (71) that passes through a connecting pipe (3) and extends to the right side of the rear end cover (4) is slidably installed on the inner side of the housing (2). A piston block (72) that fits against the inner wall of the housing (2) is fixedly installed on the left side of the piston rod (71). A sealing ring (73) is movably installed on the outer side of the piston block (72). An insert rod (74) is fixedly installed on the left side of the piston block (72).

2. The self-lubricating hydraulic cylinder piston rod assembly according to claim 1, characterized in that: The lubrication mechanism (8) includes a ring (801). The ring (801) extending to the inner side of the rear end cover (4) is fixedly installed on the right side. A sponge ring (802) that fits against the outer side of the piston rod (71) is movably installed on the inner side of the ring (801). A mounting groove (803) is provided on the right side of the rear end cover (4). A box (804) extending to the right side of the rear end cover (4) is fixedly installed on the inner side of the mounting groove (803). A cover (805) is movably installed on the right side of the inner wall of the box (804). A pressure plate (806) is slidably installed on the inner side of the box body (804). A connecting pipe (807) extending to the inner side of the ring body (801) is fixedly installed on the rear side of the inner wall of the box body (804). Two connecting rods (808) extending to the right side of the cover body (805) are fixedly installed on the right side of the pressure plate (806). A vertical plate (809) is fixedly installed between the right sides of the two connecting rods (808). A return spring (810) fixedly connected to the cover body (805) is fixedly installed on the left side of the vertical plate (809).

3. The self-lubricating hydraulic cylinder piston rod assembly according to claim 2, characterized in that: The pressing mechanism (9) includes a mounting box (91). The mounting box (91) is fixedly installed on the right side of the piston rod (71). The pull ring (10) is fixedly installed on the right side of the mounting box (91). A crossbar (94) is fixedly installed on the left side of the inner wall of the mounting box (91). A limit hole (92) is opened on the front side of the inner wall of the mounting box (91). A strip hole (93) is opened on the inner top wall of the mounting box (91). A movable cylinder (95) is slidably installed on the right side of the crossbar (94). A connecting spring (96) is fixedly installed on the left side of the movable cylinder (95) and is fixedly connected to the inner wall of the mounting box (91) and sleeved on the outside of the crossbar (94). A swing rod (97) extending to the front side of the mounting box (91) is rotatably connected to the right side of the movable cylinder (95). A movable plate (98) is fixedly installed at one end of the front side of the swing rod (97). The movable plate (98) is located on the right side of the vertical plate (809).

4. The self-lubricating hydraulic cylinder piston rod assembly according to claim 2, characterized in that: The inner wall of the box (804) has a circular hole adapted to the connecting pipe (807) on the rear side, the inner side of the ring (801) has an annular groove, and the inner wall of the ring (801) has a circular hole adapted to the connecting pipe (807) on the front side.

5. A self-lubricating hydraulic cylinder piston rod assembly according to claim 2, characterized in that: The cover (805) has a through hole inside, the size of which is adapted to the connecting rod (808). A rubber pad is fixedly installed on the right side of the vertical plate (809), and there are two return springs (810).

6. The self-lubricating hydraulic cylinder piston rod assembly according to claim 3, characterized in that: The left side of the movable cylinder (95) is provided with a circular groove that matches the crossbar (94), and one end of the swing rod (97) is rotatably connected to the movable cylinder (95) through a support shaft.

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