A single-oil-cylinder piston locking structure of a remote control grab bucket

Abstract

The utility model relates to hydraulic pressure oil cylinder technical field, and disclose a single oil cylinder remote control grab bucket's oil cylinder piston locking structure, including hydraulic pressure oil cylinder body, the inside of hydraulic pressure oil cylinder body is provided with piston rod and piston, the piston rod bottom end is located the inside screw thread installation of hydraulic pressure oil cylinder body has the piston. Single oil cylinder remote control grab bucket's oil cylinder piston locking structure, through four groups of around locking ring vertical axis symmetry distribution's threaded hole, inner ball groove, inner hexagonal flat end fastening screw and steel ball constitute the multi -point locking mechanism, the penetration type design of combination inner hexagonal flat end fastening screw and the rigid contact limit of steel ball and inner ball groove, can effectively limit the relative rotation of locking ring and piston rod, avoid the piston and piston rod loose, locking ring and the piston's resistance connection realize the axial compression fixed of piston on piston rod, obviously promoted the connection intensity and the anti -loose ability between piston rod and piston, locking ring, ensure that the oil cylinder stable operation.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a cylinder piston locking structure for a single-cylinder remote-controlled grab bucket. Background Technology

[0002] The remote-controlled grab cylinder, as the core actuator of the remote-controlled grab, achieves precise opening and closing control of the grab by integrating hydraulic and wireless remote control technologies. Its self-contained closed hydraulic system can receive remote control signals to control the solenoid valve to switch directions, changing the flow of hydraulic oil in the upper and lower chambers of the cylinder to push the piston rod to extend and retract. In conjunction with the connection between the lower end of the cylinder body and the lower support beam of the grab, and the upper end of the piston rod and the sliding seat, a lever mechanism is formed to drive the grab flaps to move. This component is widely used in ports, docks, mines, power plants, and other places, and is suitable for loading and unloading bulk materials such as coal, ore, and grain on bulk carriers and single-hook cranes. It has advantages such as no need for external power supply, continuous operation for 80 hours on a single battery charge, precise control at any position in the air, stable and shock-free operation, high grabbing efficiency, and low maintenance costs. It has become a key piece of equipment in the modern bulk cargo loading and unloading field, effectively improving operational efficiency and safety.

[0003] In traditional single-cylinder remote-controlled grabs, the piston and piston rod are usually locked together using bolts. During the opening and closing of the grab, the cylinder is subjected to periodic rotational torque. After prolonged use, the bolts may loosen, affecting the normal operation of the remote-controlled grab. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a cylinder piston locking structure for a single-cylinder remote-controlled grab bucket, which can effectively solve the problems in the prior art.

[0005] The technical solution adopted by this utility model is: a hydraulic cylinder piston locking structure for a single-cylinder remote-controlled grab bucket, including a hydraulic cylinder body, a piston rod and a piston are arranged inside the hydraulic cylinder body, the bottom end of the piston rod is threadedly installed with a piston on the inner side of the hydraulic cylinder body, a barrier gasket is arranged between the piston rod and the piston, a locking ring is threadedly installed on the bottom end of the piston rod on the inner side of the piston, both the piston rod and the locking ring have threaded holes of the same diameter, the outer diameter surface of the piston rod has an inner ball groove on the inner side of the threaded hole, a steel ball is placed inside the inner ball groove, an internal hexagonal flat-end fastening screw is threadedly installed between the piston rod and the locking ring through the threaded hole, and a piston ring is also provided on the outer diameter surface of the piston.

[0006] Preferably, the top end of the hydraulic cylinder body is threaded with an upper cover plate, and the piston rod passes through the upper cover plate and extends to the upper part of the upper cover plate.

[0007] Through the above technical solution, the upper cover plate can axially limit and radially guide the piston rod, while sealing the opening at the top of the hydraulic cylinder body to prevent internal hydraulic oil leakage and ensure the stability of the cylinder's working pressure.

[0008] Preferably, the threaded holes, inner ball grooves, internal hexagonal flat-end fastening screws, and steel balls are all provided in four identical sets, and the four sets of threaded holes, inner ball grooves, internal hexagonal flat-end fastening screws, and steel balls are symmetrically distributed around the vertical axis of the locking ring.

[0009] Through the above technical solution, the four sets of symmetrically distributed threaded holes, inner ball grooves, internal hexagonal flat-end fastening screws and steel balls can firmly lock the locking ring to the bottom end of the piston rod, solving the problem of easy loosening of the traditional hydraulic cylinder saddle bolts, thereby extending the service life of the hydraulic cylinder.

[0010] Preferably, the axes of the piston, the barrier pad, and the locking ring are located on the same vertical line, and the piston rod passes through the barrier pad and the piston and extends to the inside of the locking ring.

[0011] The above technical solution ensures that the piston, barrier pad, and locking ring are coaxially aligned, preventing uneven loading or wobbling during operation.

[0012] Preferably, the internal hexagonal flat-end fastening screw passes through the locking ring and extends to the inside of the piston rod.

[0013] Through the above technical solution, the internal hexagonal flat-end fastening screw adopts a through-type design, which can enhance the connection strength between the locking ring and the piston rod. By the pressing action between the screw end face and the steel ball, the displacement of the steel ball in the inner ball groove is restricted, thereby locking the relative position of the locking ring and the piston rod, avoiding loosening of the threads between the locking ring and the piston rod, and ensuring the stable operation of the equipment.

[0014] Preferably, the axes of the hydraulic cylinder body, piston rod, and piston are located on the same vertical line, and the locking ring is in contact with the piston.

[0015] Through the above technical solution, the hydraulic cylinder body, piston rod and piston are coaxially arranged to avoid displacement when the piston moves. At the same time, the locking ring is connected to the piston to press the piston axially on the piston rod to prevent the piston from loosening.

[0016] Compared with the prior art, this utility model provides a cylinder piston locking structure for a single-cylinder remote-controlled grab bucket, which has the following beneficial effects: The piston locking structure of this single-cylinder remote-controlled grab bucket uses four sets of threaded holes, inner ball grooves, internal hexagonal flat-end fastening screws, and steel balls symmetrically distributed around the vertical axis of the locking ring to form a multi-point locking mechanism. Combined with the through-type design of the internal hexagonal flat-end fastening screws and the rigid contact limit of the steel balls and inner ball grooves, it can effectively limit the relative rotation between the locking ring and the piston rod, preventing the piston and piston rod from loosening. At the same time, the abutting connection between the locking ring and the piston achieves axial compression and fixation of the piston on the piston rod, significantly improving the connection strength and anti-loosening ability between the piston rod and the piston and the locking ring, ensuring the stable operation of the remote-controlled grab bucket. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front structure of this utility model; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 3 This is a schematic diagram of the locking ring installation structure of this utility model; Figure 4 This is a schematic diagram of the installation structure of the hexagonal flat-end fastening screw of this utility model.

[0018] The components are: 1. Hydraulic cylinder body; 2. Upper cover plate; 3. Piston rod; 4. Piston; 5. Barrier pad; 6. Inner ball groove; 7. Locking ring; 8. Threaded hole; 9. Hex socket head cap screw; 10. Steel ball; 11. Piston ring. Detailed Implementation

[0019] 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.

[0020] Example 1: As Figure 1-4 As shown, the present invention provides a hydraulic cylinder piston locking structure for a single-cylinder remote-controlled grab bucket, comprising a hydraulic cylinder body 1, a piston rod 3 and a piston 4 disposed on the inner side of the hydraulic cylinder body 1, the piston 4 being threadedly mounted on the bottom end of the piston rod 3 on the inner side of the hydraulic cylinder body 1, a barrier pad 5 being disposed between the piston rod 3 and the piston 4, a locking ring 7 being threadedly mounted on the bottom end of the piston rod 3 on the inner side of the piston 4, both the piston rod 3 and the locking ring 7 having threaded holes 8 of the same diameter inside, an inner ball groove 6 being formed on the outer diameter surface of the piston rod 3 on the inner side of the threaded hole 8, a steel ball 10 being placed inside the inner ball groove 6, a hexagonal flat-end fastening screw 9 being threadedly mounted between the piston rod 3 and the locking ring 7 through the threaded hole 8, and a piston ring 11 being disposed on the outer diameter surface of the piston 4.

[0021] Specifically, a top cover plate 2 is threaded onto the top of the hydraulic cylinder body 1, and the piston rod 3 passes through the top cover plate 2 and extends to the upper part of the top cover plate 2. The advantage is that the top cover plate 2 can axially limit and radially guide the piston rod 3, while sealing the opening at the top of the hydraulic cylinder body 1 to prevent internal hydraulic oil leakage and ensure the stability of the cylinder's working pressure.

[0022] Example 2: like Figure 2-4 As shown, this is an improvement on the previous embodiment.

[0023] Specifically, the threaded holes 8, inner ball grooves 6, internal hexagonal socket head cap screws 9, and steel balls 10 are all provided in four identical sets. These four sets of threaded holes 8, inner ball grooves 6, internal hexagonal socket head cap screws 9, and steel balls 10 are symmetrically distributed around the vertical axis of the locking ring 7. The advantage is that the four symmetrically distributed sets of threaded holes 8, inner ball grooves 6, internal hexagonal socket head cap screws 9, and steel balls 10 can firmly lock the locking ring 7 to the bottom end of the piston rod 3, solving the problem of easy loosening of traditional hydraulic cylinders using saddle bolts, thereby extending the service life of the hydraulic cylinder.

[0024] Specifically, the axes of piston 4, barrier pad 5, and locking ring 7 are located on the same vertical line, and piston rod 3 passes through barrier pad 5 and piston 4 and extends to the inside of locking ring 7. The advantage is that the coaxial arrangement of piston 4, barrier pad 5, and locking ring 7 avoids uneven loading or shaking during movement.

[0025] Specifically, the hexagon socket head cap screw 9 passes through the locking ring 7 and extends to the inside of the piston rod 3. The advantage is that the through-type design of the hexagon socket head cap screw 9 enhances the connection strength between the locking ring 7 and the piston rod 3. Through the pressing action of the screw end face against the steel ball 10, the displacement of the steel ball 10 within the inner ball groove 6 is restricted, thereby locking the relative position of the locking ring 7 and the piston rod 3, preventing loosening of the threads between the locking ring 7 and the piston rod 3, and ensuring stable operation of the equipment.

[0026] Specifically, the axes of the hydraulic cylinder body 1, piston rod 3, and piston 4 are located on the same vertical line, and the locking ring 7 is in contact with the piston 4. The advantage is that the coaxial arrangement of the hydraulic cylinder body 1, piston rod 3, and piston 4 prevents the piston 4 from shifting during movement. Simultaneously, the contact connection between the locking ring 7 and the piston 4 axially presses the piston 4 against the piston rod 3, preventing the piston 4 from becoming detached from the piston rod 3.

[0027] Working principle: During assembly, the user first places the upper cover plate 2 and the barrier pad 5 on the outside of the piston rod 3, then aligns the piston 4 with the piston rod 3 and screws it in until the piston 4 and piston rod 3 are relatively fixed. Then, align the locking ring 7 with the piston rod 3 and screw it in until the locking ring 7 is fully in contact with the piston 4. Align the four inner ball grooves 6 with the four sets of threaded holes 8. Then, place the steel ball 10 into the threaded hole 8 and screw in the hexagon socket head cap screw 9 until the steel ball 10 is fully inserted into the inner ball groove 6, and the hexagon socket head cap screw 9, steel ball 10, and piston rod 3 are fully aligned. The piston rod 3 abuts against each other, then the piston 4 is inserted into the hydraulic cylinder body 1, and the upper cover plate 2 and the hydraulic cylinder body 1 are locked together. At this point, the assembly is complete. During use, the four sets of symmetrically distributed internal hexagonal flat-end fastening screws 9 always keep the steel ball 10 pressed against the steel ball 10. The rigid contact between the steel ball 10 and the inner ball groove 6 restricts the rotation of the locking ring 7, thereby preventing the piston 4 from loosening during the movement. This effectively solves the problem of easy loosening of the traditional hydraulic cylinder using saddle bolts, thereby extending the service life of the hydraulic cylinder and ensuring the stable operation of the remote-controlled grab.

[0028] 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 hydraulic cylinder piston locking structure for a single-cylinder remote-controlled grab bucket, comprising a hydraulic cylinder body (1), characterized in that: The inner side of the hydraulic cylinder body (1) is provided with a piston rod (3) and a piston (4). The bottom end of the piston rod (3) is threadedly installed on the inner side of the hydraulic cylinder body (1) and the piston (4) is provided with a barrier gasket (5). The bottom end of the piston rod (3) is threadedly installed on the inner side of the piston (4) and the locking ring (7) is threadedly installed. The piston rod (3) and the locking ring (7) both have threaded holes (8) with the same diameter. The outer diameter surface of the piston rod (3) has an inner ball groove (6) on the inner side of the threaded hole (8). A steel ball (10) is placed inside the inner ball groove (6). The piston rod (3) and the locking ring (7) are threadedly installed with an internal hexagonal flat-end fastening screw (9) through the threaded hole (8). The outer diameter surface of the piston (4) is also provided with a piston ring (11).

2. The cylinder piston locking structure of a single-cylinder remote-controlled grab bucket according to claim 1, characterized in that: The top of the hydraulic cylinder body (1) is threaded with an upper cover plate (2), and the piston rod (3) passes through the upper cover plate (2) and extends to the upper part of the upper cover plate (2).

3. The cylinder piston locking structure of a single-cylinder remote-controlled grab bucket according to claim 1, characterized in that: The threaded hole (8), inner ball groove (6), internal hexagonal flat-end fastening screw (9) and steel ball (10) are all provided with four identical sets, and the four sets of threaded hole (8), inner ball groove (6), internal hexagonal flat-end fastening screw (9) and steel ball (10) are symmetrically distributed around the vertical axis of the locking ring (7).

4. The cylinder piston locking structure of a single-cylinder remote-controlled grab bucket according to claim 1, characterized in that: The axes of the piston (4), the barrier pad (5) and the locking ring (7) are located on the same vertical line, and the piston rod (3) passes through the barrier pad (5) and the piston (4) and extends to the inside of the locking ring (7).

5. The cylinder piston locking structure of a single-cylinder remote-controlled grab bucket according to claim 1, characterized in that: The internal hexagonal flat-end fastening screw (9) passes through the locking ring (7) and extends to the inside of the piston rod (3).

6. The cylinder piston locking structure of a single-cylinder remote-controlled grab bucket according to claim 1, characterized in that: The axes of the hydraulic cylinder body (1), piston rod (3) and piston (4) are located on the same vertical line, and the locking ring (7) is in contact with the piston (4).

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