Slipper assembly for action of a hydraulic steering gear

Abstract

The utility model discloses a slider assembly for the action of fork type hydraulic steering engine, including slider body, the cross section of slider body is square, the center of slider body is provided with the aperture of through slider body upper and lower end, is provided with the sliding sleeve in aperture, still be provided with the limiting mechanism for limiting the axial movement of sliding sleeve on the upper and lower end of slider body. Through the sleeve setting slider assembly on the drive column, the original line contact structure is improved to the surface contact form. This design has improved the stress distribution condition significantly, has avoided the local stress concentration problem effectively. The change of contact form not only has promoted the stability of transmission, has also optimized the wear characteristic greatly, has laid the foundation for the long -term stable operation of system.

Description

Technical Field

[0001] This utility model relates to the field of marine hydraulic steering gear, and in particular to a slider assembly for the operation of a fork-type hydraulic steering gear. Background Technology

[0002] As a core steering device in modern ships, the fork-type hydraulic steering gear uses a hydraulic system to drive the swivel seat to rotate, thereby steering the rudder. For example, patent announcement number CN219790506 U discloses a steering device for a fork-type hydraulic steering gear, employing a transmission method where a drive column, a friction-reducing wear-resistant ring, and a fork slot in the swivel seat are connected. When the hydraulic system pushes the connecting hydraulic rod in a linear motion, the drive column fixed to the hydraulic rod will, through the friction-reducing wear-resistant ring contacting the side wall of the fork slot, convert the linear thrust into a tangential force on the fork slot, ultimately driving the swivel seat to rotate around a fixed axis.

[0003] However, this structure has significant drawbacks in practical applications. The drive column and fork slot typically have line contact, leading to high stress concentration and severe wear after long-term operation, affecting transmission accuracy. Furthermore, the lack of an effective wear compensation mechanism often necessitates disassembling the entire drive assembly for maintenance, which is not only time-consuming and labor-intensive but also increases maintenance costs. In addition, traditional structures are prone to localized deformation or cracking due to stress concentration when subjected to impact loads, further reducing the system's service life.

[0004] While existing technologies attempt to improve wear by increasing material hardness or enhancing lubrication, these solutions often fail to balance transmission stability and ease of maintenance. For example, while overall hardening can improve wear resistance, it increases the risk of brittle fracture; and coating technology faces the problem of coating peeling. Therefore, there is an urgent need for a new steering mechanism structure that can reduce contact stress and simplify maintenance procedures. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned technical problems and provide a slider assembly for the operation of a fork-type hydraulic servo motor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A slider assembly for the operation of a fork-type hydraulic servo motor includes a slider body with a square cross-section. The slider body has an opening at its center that extends through the upper and lower ends. A sliding sleeve is disposed within the opening. Limiting mechanisms for restricting the axial movement of the sliding sleeve are also provided at the upper and lower ends of the slider body.

[0008] The above technical solution improves the original line contact structure into a surface contact structure by installing a slider assembly on the drive column. This design significantly improves the force distribution and effectively avoids local stress concentration. The change in contact form not only enhances the smoothness of transmission but also greatly optimizes wear characteristics, laying the foundation for long-term stable operation of the system.

[0009] As a preferred embodiment of this utility model, the limiting mechanism is a limiting plate, and the limiting plate is provided with a through hole extending through the thickness direction of the limiting plate. The through hole is coaxially arranged with the sliding sleeve, and the diameter of the through hole is larger than the inner diameter of the sliding sleeve and smaller than the outer diameter of the sliding sleeve.

[0010] The above technical solution ensures that the drive column can pass through the sliding sleeve by having a through hole diameter larger than the inner diameter of the sliding sleeve, while the structure smaller than the outer diameter of the sliding sleeve forms a mechanical stop.

[0011] As a preferred embodiment of this invention, the limiting plate is fixedly connected to the slider body by locking screws.

[0012] The above technical solution enables the quick disassembly and maintenance of the limit plate through the locking screw connection method, which facilitates the subsequent replacement of the sliding sleeve.

[0013] As a preferred embodiment of this invention, the sliding sleeve and the slider body are in an interference fit.

[0014] Through the above technical solution, the interference fit creates a permanent stress-locking structure between the sleeve and the slider body. This fit method ensures that the micro-displacement of the mating surfaces is controlled within 0.003mm when the component is subjected to typical working loads of a hydraulic servo motor, reducing the risk of fretting wear by 90% compared to traditional clearance fits.

[0015] As a preferred embodiment of this invention, a wear-resistant plate is provided at the position where the slider body contacts the swing seat fork groove.

[0016] By using the above technical solution, and by setting a wear-resistant plate, the wear mainly occurs on the replaceable wear-resistant plate, which can extend the service life of the slider body.

[0017] As a preferred embodiment of this invention, the wear-resistant plate and the slider body are detachable.

[0018] The above technical solution, with its detachable structure, facilitates the replacement of wear-resistant plates.

[0019] As a preferred embodiment of this invention, the wear-resistant plate and the slider body are connected by locking screws.

[0020] With the above technical solution, the wear-resistant plate and the slider body are connected by locking screws, which facilitates quick replacement of the wear-resistant plate.

[0021] In summary, this utility model has at least one of the following beneficial technical effects:

[0022] 1. By installing a slider assembly on the drive column, the original line contact structure is improved to a surface contact structure. This design significantly improves the force distribution and effectively avoids local stress concentration problems. The change in contact form not only enhances the smoothness of transmission but also greatly optimizes wear characteristics, laying the foundation for long-term stable operation of the system.

[0023] 2. The detachable wear-resistant plate on the side of the slider body realizes the modular design concept of key friction pairs. This innovative structure allows for the replacement of worn parts individually without disassembling the entire drive system, greatly simplifying the maintenance process. The wear-resistant plate is made of a special alloy material and is precision machined, ensuring both excellent wear resistance and assembly accuracy, making system maintenance more convenient and efficient. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the slider assembly structure for the operation of a fork-type hydraulic steering gear according to this utility model.

[0025] Figure 2 This is a cross-sectional structural diagram of the slider assembly for the operation of a fork-type hydraulic servo motor according to this utility model.

[0026] Figure 3 This is a structural diagram of the slider assembly for the operation of a fork-type hydraulic servo motor according to this utility model.

[0027] The components shown in the diagram are: 1. Slider body; 2. Wear-resistant plate; 3. Limiting plate; 4. Sliding sleeve; 5. Drive column. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-3 This utility model will be described in further detail.

[0029] Example 1

[0030] like Figure 1 and Figure 2 As shown, a slider assembly for a fork-type hydraulic steering gear includes a slider body 1 with a square cross-section. An opening penetrating the upper and lower ends of the slider body 1 is provided at its center. In this embodiment, the slider body 1 requires high hardness and can be made of QT500-7 ductile iron, a material with excellent comprehensive properties, a tensile strength of 500-700 MPa, meeting the load-bearing requirements of ship steering gears, and is also low in cost. A sliding sleeve 4 is provided within the opening, and limiting mechanisms for restricting the axial movement of the sliding sleeve 4 are also provided at the upper and lower ends of the slider body 1.

[0031] In this embodiment, the sliding sleeve 4 is made of copper, and ZCuSn10P1 tin bronze can be selected: it contains 10% tin to improve wear resistance and has good self-lubricating properties. The sliding sleeve 4 and the slider body 1 are interference fit, and the sliding sleeve 4 is installed into the opening of the slider body 1 after cooling.

[0032] The limiting mechanism is a limiting plate 3, which has a through hole extending through its thickness. The through hole is coaxial with the sliding sleeve 4, and its diameter is larger than the inner diameter of the sliding sleeve 4 but smaller than its outer diameter. The limiting plate 3 is fixed to the upper and lower end faces of the slider body 1 by screws, and abuts against the upper and lower ends of the sliding sleeve 4, thereby limiting the axial direction of the sliding sleeve 4.

[0033] In this embodiment, the sliding sleeve 4 and the slider body 1 are interference fit. After the sliding sleeve 4 is cooled down, it is placed in the opening in the center of the slider body 1. After the sliding sleeve 4 returns to normal temperature, it will form an interference fit with the slider body 1.

[0034] A wear-resistant plate 2 is provided at the contact position between the slider body 1 and the swing seat fork groove. The wear-resistant plate 2 can be made of Cr15Mo3 high-chromium cast iron. The wear-resistant plate 2 and the slider body 1 are detachable. In this embodiment, the wear-resistant plate 2 is fixed to the side of the slider body 1 by locking screws.

[0035] like Figure 3 As shown, the slider assembly for the operation of the fork-type hydraulic servo in this embodiment is installed on the drive column 5 during use. The inner circumferential surface of the sliding sleeve 4 contacts the outer circumferential surface of the drive column 5, and the wear-resistant plate 2 on the slider body 1 contacts the two end faces of the fork groove.

[0036] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A slider assembly for the operation of a fork-type hydraulic steering gear, characterized in that: The slide includes a slider body (1), the cross-section of which is square. The center of the slider body (1) has an opening that passes through the upper and lower ends of the slider body (1). A sliding sleeve (4) is provided in the opening. A limiting mechanism for restricting the axial movement of the sliding sleeve (4) is also provided at the upper and lower ends of the slider body (1).

2. The slider assembly for the operation of a fork-type hydraulic servo motor according to claim 1, characterized in that: The limiting mechanism is a limiting plate (3). The limiting plate (3) has a through hole that runs through the thickness direction of the limiting plate (3). The through hole is coaxially arranged with the sliding sleeve (4). The diameter of the through hole is larger than the inner diameter of the sliding sleeve (4) and smaller than the outer diameter of the sliding sleeve (4).

3. A slider assembly for the operation of a fork-type hydraulic servo motor according to claim 2, characterized in that: The limiting plate (3) is fixedly connected to the slider body (1) by locking screws.

4. A slider assembly for the operation of a fork-type hydraulic steering gear according to claim 1, characterized in that: The sliding sleeve (4) and the slider body (1) are interference fit.

5. A slider assembly for the operation of a fork-type hydraulic steering gear according to claim 1, characterized in that: A wear-resistant plate (2) is provided at the position where the slider body (1) contacts the swing seat fork groove.

6. A slider assembly for the operation of a fork-type hydraulic steering gear according to claim 5, characterized in that: The wear-resistant plate (2) and the slider body (1) are detachable.

7. A slider assembly for the operation of a fork-type hydraulic servo according to claim 6, characterized in that: The wear-resistant plate (2) is connected to the slider body (1) by a locking screw.

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