Hydraulic cylinder piston rod assembly

Abstract

The utility model relates to the technical field of piston rod assembly, specifically a kind of hydraulic cylinder piston rod assembly, including cylinder barrel, cylinder barrel is equipped with upper cylinder cover, and the piston rod body is slidably connected on upper cylinder cover, and the end of piston rod body is equipped with connector by mounting structure, and connector is rotatably connected with mounting head on it, and mounting head is threadedly connected with lock head on it, and lock head is in contact with connector, and mounting head is equipped with slot, and the end of piston rod body is inserted with slot, and screw rod is rotatably connected with mounting head, and two sliding blocks are symmetrically slidably connected in the inside of mounting head, and the opposite direction of screw rod both ends is threaded, and screw rod is threadedly connected with sliding block, and clamping block is fixedly connected on sliding block, and clamping groove is equipped on piston rod body, and clamping block is engaged with clamping groove;Through mounting structure, connector is quickly installed and disassembled at the end of piston rod body, and simultaneously reduce the thread damage under high-strength tension working condition, improve the stability of the installation connection of piston rod body and connector.

Description

Technical Field

[0001] This utility model relates to a piston rod assembly, specifically a hydraulic cylinder piston rod assembly, and belongs to the technical field of piston rod assembly. Background Technology

[0002] In practical applications of hydraulic cylinders, the piston rod assembly, as the core transmission component, directly affects the working efficiency and service life of the hydraulic cylinder due to its connection stability, ease of installation, and overall protection performance.

[0003] However, the installation structure of the piston rod and connector of traditional hydraulic cylinder piston rod assemblies mostly adopts a single thread fixing or welding method. The former is prone to thread damage at the port under long-term high-intensity tensile conditions, resulting in troublesome disassembly of the connector or connection failure. The latter cannot achieve disassembly and maintenance later, resulting in high maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic cylinder piston rod assembly to solve the above problems. The assembly allows for quick installation and disassembly of the connector at the end of the piston rod body through an installation structure, while reducing thread damage under high-strength tensile conditions and improving the stability of the installation connection between the piston rod body and the connector.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a hydraulic cylinder piston rod assembly, including a cylinder barrel, an upper cylinder cover, a piston rod body slidably connected to the upper cylinder cover, a connector head mounted on the end of the piston rod body via an installation structure, the installation structure including an installation head, an installation head rotatably connected to the connector head, a locking head threadedly connected to the installation head, the locking head abutting against the connector head, a slot provided on the installation head, the end of the piston rod body inserting into the slot, a screw rotatably connected to the installation head, two sliders symmetrically slidably connected inside the installation head, the threads at both ends of the screw having opposite directions, the screw threadedly connected to the sliders, a locking block fixedly connected to the slider, a locking groove provided on the piston rod body, the locking block engaging with the locking groove.

[0006] Preferably, the mounting head has two guide shafts fixedly connected inside, and the slider is slidably connected to the guide shafts.

[0007] Preferably, the mounting head has two flat grooves, and the lock head has a fixing groove with a regular hexagonal cross-section.

[0008] Preferably, the mounting head is provided with a limiting structure, the limiting structure includes a locking hole, the mounting head is provided with a plurality of locking holes arranged in a circumferential array, and the connecting head is slidably connected with a locking rod, the locking rod engaging with one of the locking holes.

[0009] Preferably, the cross-section of the clamp rod is a cross-shaped structure, a spring is fixedly connected between the clamp rod and the connector, and a pull ring is provided at the end of the clamp rod.

[0010] Preferably, the cylinder is provided with a lower cylinder cover, the lower cylinder cover is provided with a first oil injection hole, and the upper cylinder cover is provided with a second oil injection hole.

[0011] Preferably, the upper cylinder head is provided with a protective structure, the protective structure including protective rods, four protective rods passing through the upper cylinder head, and the ends of the protective rods being locked to the lower cylinder head by a first nut.

[0012] Preferably, the piston rod body is fixedly connected to the piston body at the end inside the cylinder by a second nut. The piston body is provided with two sealing rings, which are slidably connected to the inner wall of the cylinder to form a sealing fit.

[0013] Preferably, an oil seal is fixedly connected to the upper cylinder head, the piston rod body is slidably connected to the oil seal, a dustproof ring is provided at the end of the oil seal, a guide sleeve is provided on the upper cylinder head, and the piston rod body is slidably connected to the guide sleeve.

[0014] The beneficial effects of this utility model are as follows: An upper cylinder cover is provided on the cylinder barrel, and a piston rod body is slidably connected to the upper cylinder cover. A connector is mounted on the end of the piston rod body through an installation structure. An installation head is rotatably connected to the connector. A locking head is threadedly connected to the installation head, and the locking head abuts against the connector. A slot is provided on the installation head, and the end of the piston rod body is inserted into the slot. A screw is rotatably connected to the installation head. Two sliders are symmetrically slidably connected inside the installation head. The threads at both ends of the screw are in opposite directions, and the screw is threadedly connected to the sliders. A locking block is fixedly connected to the slider. A locking groove is provided on the piston rod body, and the locking block engages with the locking groove. The installation structure allows for quick installation and removal of the connector at the end of the piston rod body, while reducing thread damage under high-strength tensile conditions and improving the stability of the installation connection between the piston rod body and the connector. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the piston rod body and the piston body of this utility model.

[0017] Figure 3 for Figure 2 The diagram shown is an enlarged view of the structure of part A.

[0018] Figure 4 This is a schematic diagram of the connection structure between the cylinder barrel and the upper cylinder head of this utility model;

[0019] Figure 5 for Figure 4 The diagram shown is an enlarged view of the structure of section B.

[0020] Figure 6 This is a schematic diagram of the connection structure between the mounting head and the lock head of this utility model.

[0021] In the diagram: 1. Cylinder; 2. Upper cylinder head; 3. Piston rod body; 4. Mounting structure; 401. Mounting head; 402. Flat groove; 403. Lock head; 404. Fixing groove; 405. Slot; 406. Screw; 407. Slider; 408. Locking block; 409. Locking groove; 410. Guide shaft; 5. Limiting structure; 501. Locking hole; 502. Locking rod; 503. Spring; 504. Pull ring; 6. Protective structure; 601. Protective rod; 602. First nut; 7. Connector; 8. Lower cylinder head; 9. First oil filling hole; 10. Second oil filling hole; 11. Piston body; 12. Second nut; 13. Sealing ring; 14. Oil seal; 15. Dustproof ring; 16. Guide sleeve. 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 Figures 1-6 As shown, a hydraulic cylinder piston rod assembly includes a cylinder barrel 1, an upper cylinder cover 2 on the cylinder barrel 1, a piston rod body 3 slidably connected to the upper cylinder cover 2, and a connector 7 mounted on the end of the piston rod body 3 via a mounting structure 4. The mounting structure 4 includes a mounting head 401, the mounting head 401 being rotatably connected to the connector 7, a locking head 403 being threadedly connected to the mounting head 401, the locking head 403 abutting against the connector 7, and a slot 405 on the mounting head 401, the end of the piston rod body 3 being inserted into the slot 405. The mounting head 401 is equipped with a screw 406 and two sliders 407 are symmetrically slidably connected inside. The screw 406 has opposite thread directions at both ends and is threadedly connected to the sliders 407. A locking block 408 is fixedly connected to the slider 407. The piston rod body 3 is provided with a locking groove 409, and the locking block 408 engages with the locking groove 409. The mounting structure 4 allows for quick installation and removal of the connector 7 at the end of the piston rod body 3, while reducing thread damage under high-strength tensile conditions and improving the stability of the installation connection between the piston rod body 3 and the connector 7.

[0024] As a technical optimization of this utility model, the mounting head 401 has two guide shafts 410 fixedly connected inside, and the slider 407 is slidably connected to the guide shafts 410. The guide shafts 410 can limit the movement direction of the slider 407, prevent the slider 407 from rotating during sliding, and ensure that the slider 407 drives the locking block 408 to accurately engage with the locking groove 409 on the piston rod body 3.

[0025] As a technical optimization of this utility model, the mounting head 401 is provided with two flat grooves 402, and the locking head 403 is provided with a fixing groove 404 with a regular hexagonal cross section. The fixing groove 404 with a regular hexagonal cross section on the locking head 403 facilitates operation with tools such as wrenches, reducing the difficulty of operation. The two flat grooves 402 on the mounting head 401 can also make it convenient for workers to hold during the installation process, improving the installation efficiency.

[0026] As a technical optimization of this utility model, the mounting head 401 is provided with a limiting structure 5, which includes a locking hole 501. Multiple locking holes 501 are arranged in a circumferential array on the mounting head 401. A locking rod 502 is slidably connected to the connecting head 7, and the locking rod 502 engages with one of the locking holes 501. The cross-section of the locking rod 502 is a cross-shaped structure. A spring 503 is fixedly connected between the locking rod 502 and the connecting head 7. A pull ring 504 is provided at the end of the locking rod 502. Pulling the pull ring 504 at the end of the locking rod 502 in the limiting structure 5 causes... The locking rod 502 overcomes the elastic force of the spring 503 and disengages from the locking hole 501 on the mounting head 401. At this time, the connector head 7 can be rotated to the required angle. After releasing the pull ring 504, the spring 503 returns to its original position and pushes the locking rod 502 to engage with the corresponding locking hole 501, thereby quickly fixing the angle of the connector head 7. The cross-sectional structure of the locking rod 502 can prevent the locking rod 502 from rotating during sliding, ensuring the stability of the engagement. This limiting structure 5 design makes the angle adjustment of the connector head 7 flexible and convenient, meeting the connection requirements under different working conditions.

[0027] As a technical optimization of this utility model, the cylinder 1 is provided with a lower cylinder cover 8, the lower cylinder cover 8 is provided with a first oil injection hole 9, and the upper cylinder cover 2 is provided with a second oil injection hole 10; hydraulic oil is injected or discharged into the cylinder 1 through the first oil injection hole 9 on the lower cylinder cover 8 and the second oil injection hole 10 on the upper cylinder cover 2, so as to realize the reciprocating motion of the piston body 11 driving the piston rod body 3, thereby driving the external equipment to work.

[0028] As a technical optimization of this utility model, the upper cylinder head 2 is provided with a protective structure 6, which includes a protective rod 601. Four protective rods 601 pass through the upper cylinder head 2, and the ends of the protective rods 601 are locked to the lower cylinder head 8 by the first nut 602. The protective rods 601 can protect the cylinder 1, prevent external objects from colliding with the cylinder 1 and causing damage, enhance the overall structural strength of the component, and ensure the stable operation of the component in a complex industrial environment.

[0029] As a technical optimization of this utility model, the piston rod body 3 is fixedly connected to the piston body 11 at the end inside the cylinder 1 by the second nut 12. The piston body 11 is provided with two sealing rings 13, which are slidably connected to the inner wall of the cylinder 1 and form a sealing fit. The two sealing rings 13 on the piston body 11 are slidably connected to the inner wall of the cylinder 1 and form a sealing fit. This double sealing ring 13 design can effectively enhance the sealing performance inside the cylinder 1, prevent hydraulic oil leakage, ensure the normal pressure output of the hydraulic cylinder, and ensure the stability of the equipment drive.

[0030] As a technical optimization of this utility model, an oil seal 14 is fixedly connected to the upper cylinder head 2, and the piston rod body 3 is slidably connected to the oil seal 14. A dustproof ring 15 is provided at the end of the oil seal 14, and a guide sleeve 16 is provided on the upper cylinder head 2. The piston rod body 3 is slidably connected to the guide sleeve 16. The oil seal 14 fixedly connected to the upper cylinder head 2 and the piston rod body 3 are slidably connected, which can further prevent the hydraulic oil in the cylinder 1 from leaking outward. The dustproof ring 15 at the end of the oil seal 14 can prevent external dust and impurities from entering the cylinder 1, avoiding dust and impurities from causing wear on the inner wall of the cylinder 1 and the piston body 11, and extending the service life of the components. At the same time, the guide sleeve 16 on the upper cylinder head 2 is slidably connected to the piston rod body 3, providing precise guidance for the reciprocating motion of the piston rod body 3, reducing the offset of the piston rod body 3 during movement, and ensuring the smoothness of movement.

[0031] In use, the components are first installed. The end of the piston rod body 3 located inside the cylinder 1 is fixedly connected to the piston body 11 by the second nut 12. The two sealing rings 13 on the piston body 11 are slidably connected to the inner wall of the cylinder 1 to form a sealing fit. This double sealing ring 13 design can effectively enhance the sealing performance inside the cylinder 1, prevent hydraulic oil leakage, ensure the normal pressure output of the hydraulic cylinder, and ensure the stability of the equipment drive. Next, the upper cylinder cover 2 is installed. The oil seal 14 fixedly connected to the upper cylinder cover 2 is slidably connected to the piston rod body 3, which can further prevent the hydraulic oil inside the cylinder 1 from leaking outward. The dustproof ring 15 at the end of the oil seal 14 can prevent external dust and impurities from entering the cylinder 1, avoiding dust and impurities from causing wear on the inner wall of the cylinder 1 and the piston body 11, and extending the service life of the components. At the same time, the guide sleeve 16 on the upper cylinder cover 2 is slidably connected to the piston rod body 3, providing precise guidance for the reciprocating motion of the piston rod body 3, reducing the offset of the piston rod body 3 during movement, and ensuring the smoothness of movement.

[0032] Next, the connector 7 is installed. The mounting head 401 is inserted into the slot 405 at the end of the piston rod body 3. The screw 406 on the mounting head 401 is rotated. Since the threads at both ends of the screw 406 are opposite and are threadedly connected to the two sliders 407, the two sliders 407 will slide symmetrically inside the mounting head 401 when the screw 406 is rotated. The guide shaft 410 can restrict the movement direction of the sliders 407, prevent the sliders 407 from rotating during the sliding process, and ensure that the sliders 407 drive the locking block 408 to accurately engage with the locking groove 409 on the piston rod body 3, so as to realize the quick positioning connection between the mounting head 401 and the piston rod body 3. The operation is convenient and efficient.

[0033] Then, rotate the locking head 403 threaded on the mounting head 401 to make the locking head 403 abut against the connector 7, thus fixing the connector 7 to the mounting head 401. The fixing groove 404 with a regular hexagonal cross section on the locking head 403 makes it easy to operate with tools such as wrenches, reducing the difficulty of operation. The two flat grooves 402 on the mounting head 401 also make it easy for workers to hold during the installation process, improving installation efficiency.

[0034] When the angle of connector 7 needs to be adjusted, pull the pull ring 504 at the end of the locking rod 502 in the limiting structure 5, so that the locking rod 502 overcomes the elastic force of the spring 503 and disengages from the locking hole 501 on the mounting head 401. At this time, connector 7 can be rotated to the required angle. After releasing the pull ring 504, the spring 503 returns to its original position and pushes the locking rod 502 to engage with the corresponding locking hole 501, thereby quickly fixing the angle of connector 7. The cross-sectional structure of the locking rod 502 can prevent the locking rod 502 from rotating during sliding, ensuring the stability of the engagement. This limiting structure 5 design makes the angle adjustment of connector 7 flexible and convenient, meeting the connection requirements under different working conditions.

[0035] During the use of the component, hydraulic oil is injected or discharged into the cylinder 1 through the first oil injection hole 9 on the lower cylinder head 8 and the second oil injection hole 10 on the upper cylinder head 2, so as to realize the reciprocating motion of the piston body 11 driving the piston rod body 3, thereby driving the external equipment to work. At the same time, the four protective rods 601 that pass through the upper cylinder head 2 are locked to the lower cylinder head 8 by the first nut 602. The protective rods 601 can protect the cylinder 1, prevent external objects from colliding with the cylinder 1 and causing damage, enhance the overall structural strength of the component, and ensure the stable operation of the component in complex industrial environments.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydraulic cylinder piston rod assembly, comprising a cylinder barrel (1), an upper cylinder cover (2) provided on the cylinder barrel (1), a piston rod body (3) slidably connected to the upper cylinder cover (2), and a connector (7) mounted on the end of the piston rod body (3) via an mounting structure (4), characterized in that: The mounting structure (4) includes a mounting head (401), which is rotatably connected to the connector (7). A lock head (403) is threaded onto the mounting head (401), and the lock head (403) abuts against the connector (7). A slot (405) is provided on the mounting head (401), and the end of the piston rod body (3) is inserted into the slot (405). A screw (406) is rotatably connected to the mounting head (401). Two sliders (407) are symmetrically slidably connected inside the mounting head (401). The threads at both ends of the screw (406) are opposite in direction. The screw (406) is threadedly connected to the slider (407). A locking block (408) is fixedly connected to the slider (407). A slot (409) is provided on the piston rod body (3), and the locking block (408) engages with the slot (409).

2. The hydraulic cylinder piston rod assembly according to claim 1, characterized in that: The mounting head (401) has two guide shafts (410) fixedly connected inside, and the slider (407) is slidably connected to the guide shafts (410).

3. The hydraulic cylinder piston rod assembly according to claim 1, characterized in that: The mounting head (401) is provided with two flat grooves (402), and the lock head (403) is provided with a fixing groove (404) with a regular hexagonal cross section.

4. A hydraulic cylinder piston rod assembly according to claim 1, characterized in that: The mounting head (401) is provided with a limiting structure (5), the limiting structure (5) includes a locking hole (501), the mounting head (401) is provided with a plurality of locking holes (501) in a circumferential array, and the connector (7) is slidably connected with a locking rod (502), the locking rod (502) engaging with one of the locking holes (501).

5. A hydraulic cylinder piston rod assembly according to claim 4, characterized in that: The cross section of the lever (502) is a cross shape. A spring (503) is fixedly connected between the lever (502) and the connector (7). A pull ring (504) is provided at the end of the lever (502).

6. A hydraulic cylinder piston rod assembly according to claim 1, characterized in that: The cylinder (1) is provided with a lower cylinder cover (8), the lower cylinder cover (8) is provided with a first oil injection hole (9), and the upper cylinder cover (2) is provided with a second oil injection hole (10).

7. A hydraulic cylinder piston rod assembly according to claim 6, characterized in that: The upper cylinder head (2) is provided with a protective structure (6), which includes a protective rod (601). Four protective rods (601) pass through the upper cylinder head (2), and the ends of the protective rods (601) are locked to the lower cylinder head (8) by a first nut (602).

8. A hydraulic cylinder piston rod assembly according to claim 1, characterized in that: The piston rod body (3) is fixedly connected to the piston body (11) at the end inside the cylinder (1) by a second nut (12). The piston body (11) is provided with two sealing rings (13), which are slidably connected to the inner wall of the cylinder (1) and form a sealing fit.

9. A hydraulic cylinder piston rod assembly according to claim 1, characterized in that: An oil seal (14) is fixedly connected to the upper cylinder head (2), the piston rod body (3) is slidably connected to the oil seal (14), the end of the oil seal (14) is provided with a dustproof ring (15), the upper cylinder head (2) is provided with a guide sleeve (16), and the piston rod body (3) is slidably connected to the guide sleeve (16).

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