A retractable actuator cylinder with an upper locking pin

Abstract

The utility model belongs to the technical field of locking structure design, specifically relates to a kind of upper locking pin in retraction and extension actuator, including outside lock block, inside lock block, inside lock block upper end is provided with lock tongue, outside lock block is provided with the lock hole cooperation with lock shed, and limit hole that cooperates locking pin is also opened on lock shed, the lock tongue is inserted into lock hole, and the locking and fixing of outside lock block and inside lock block are realized by lock pin.The utility model improves the material structure of upper locking pin in retraction and extension actuator, enhances the wear resistance and lubrication degree of product, greatly reduces the wear degree under the running scene.Multiple component gradient structure design is adopted, the bearing capacity and toughness of product surface are strengthened, and the fracture and shedding phenomenon caused by extreme environment are avoided.

Description

Technical Field

[0001] This utility model belongs to the field of locking structure design technology, specifically relating to an upper locking pin in a retractable actuator cylinder, which is a support arm design structure for RAT that uses a DLC film layer to replace the upper locking pin in the retractable actuator cylinder. Background Technology

[0002] A certain model of ram air turbine (RAT) system consists of a retractable actuator, turbine components, gearbox assembly, multi-functional combined hydraulic pump, support arm, and frame. The RAT release function is accomplished by the retractable actuator. The deployment of the retractable actuator is achieved through three parts: an unlocking mechanism, a locking mechanism, and a release mechanism. The unlocking mechanism consists of a deployment electromagnet and unlocking control components; the locking mechanism consists of an upper locking pin, cylindrical rollers, a locking piston spring, and a locking piston; and the release mechanism consists of a deployment spring and a hydraulic cylinder.

[0003] The upper locking pin has two states. In the RAT retracted state, it is locked in the retraction and extension actuator cylinder. In the RAT extended state, the upper locking pin moves and releases under the squeezing force of the inner cylinder, releasing the spring force of the actuator cylinder and extending the product.

[0004] Due to material limitations, existing upper locking pins are prone to wear and have low lubrication during internal movement and release operations, requiring more precise manufacturing. Utility Model Content

[0005] The purpose of this invention is to improve the material structure of the upper locking pin in the retracting actuator cylinder and design an upper locking pin with higher wear resistance and toughness.

[0006] The technical solution of this utility model is as follows: a locking pin in a retractable actuator cylinder, comprising an outer locking block and an inner locking block. The upper end of the inner locking block is provided with a locking tongue, and the outer locking block is provided with a locking hole that cooperates with the locking chamber. The locking chamber is also provided with a limiting hole for cooperating with a locking pin. The locking tongue is inserted into the locking hole, and the outer locking block and the inner locking block are locked and fixed by the locking pin.

[0007] Furthermore, both the outer and inner locking blocks are provided with DLC film layers.

[0008] Furthermore, the outer and inner locking blocks are equipped with DLC film layers using multi-gradient structure DLC film layer technology.

[0009] Furthermore, the outer locking block is also provided with anti-rotation holes that cooperate with the external structure.

[0010] Furthermore, the locking tongue adopts a rectangular structure.

[0011] Furthermore, the inner locking block is made of 40CrNiMoA material.

[0012] The core design technology of the improved upper locking pin design of the DLC film layer in this utility model is reflected in: 1) The upper locking pin is composed of an outer locking block, an inner locking block, and a cylindrical pin. Figure 1 Showing the overall shape of the upper locking pin. Figure 2 Show the internal structure of the product cross-section. 2) The outer locking block is designed with QBe2 material to ensure a certain level of lubricity and prevent adhesion; the inner locking block is designed with 40CrNiMoA material to meet certain rigidity requirements. During fabrication, a multi-gradient structure DLC film layer technology is used on the locking block structure to improve the outer surface of the product material.

[0013] The beneficial effects of this utility model are as follows: 1) By improving the material structure of the upper locking pin in the retractable actuator cylinder, the wear resistance and lubrication of the product are enhanced, greatly reducing the wear level under operating conditions. 2) The multi-layer composition gradient structure design strengthens the load-bearing capacity and toughness of the product surface, avoiding breakage and detachment induced by extreme environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the structure of this utility model; Figure 3 This is a diagram showing the usage state of this utility model; Among them, the outer locking block 1, the cylindrical pin 2, the inner locking block 3, the outer locking block DLC plating layer 4, and the inner locking block DLC plating layer 5. Detailed Implementation

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings or specific implementation examples. It should be noted that some (but not all) of the disclosed examples are shown in the drawings. In fact, many different examples can be described, and these examples should not be construed as limited to the examples set forth herein. Rather, these examples are described to better demonstrate the positive effects of this utility model, and all aspects not detailed herein are considered to be well-known or conventional techniques in the art.

[0016] See appendix Figure 1 , Figure 2The main body of the upper locking pin in this utility model is composed of an outer locking block 1 and an inner locking block 3, which are locked together by a cylindrical pin 2. The product is symmetrically placed inside the actuating cylinder and uses a mechanical structure combined with a locking piston and cylindrical rollers. The outer and inner locking blocks are coated through five steps: incoming material inspection, cleaning, clamping, coating, and performance testing. A NiCr / Cr / CrW / CrWC / W-DLC gradient multilayer structure is adopted, and multi-gradient and thickness are precisely controlled to obtain a film / substrate interface with good bonding strength, thereby improving the film's load-bearing capacity and toughness. At the same time, according to different model requirements, the specific film system can be customized to meet the requirements of DLC design with high precision in terms of wear resistance, high corrosion resistance, lubrication, and sealing.

[0017] See appendix Figure 3 As shown, the upper locking pin proposed in this utility model, when used, receives an external electrical signal to the retracting actuator cylinder; upon receiving the signal, the retracting component generates a downward suction force Fd, pulling the locking control component and causing its center A to cross the product's central axis. After center A crosses the central axis, the internal small spring force reverses and becomes a driving force that drives the locking control component to rotate counterclockwise around the axis. Under the action of the internal small spring, the locking piston moves to the right and the cylindrical roller exits from the bottom of the locking pin. The upper locking pin is radially released from its mechanical limit and, under the squeezing force of the inner cylinder, retracts into the piston head's circular hole, thus releasing the upper lock. After the upper lock is released, the hydraulic cylinder extends outward under the action of the external release spring until it is fully extended.

[0018] The above specific embodiments or examples are only used to explain the technical solutions of this utility model and are not intended to limit this application. Parts not described in detail are considered to be conventional technical means or common knowledge in the field. It can be understood by those skilled in the art that, based on the design concept of this application, adaptive modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications, equivalent substitutions, and adaptive improvements do not depart from the technical essence of this utility model and should all be covered within the protection scope of this application.

Claims

1. A locking pin in the upper position of a retractable actuator cylinder, characterized in that, It includes an outer locking block and an inner locking block. The upper end of the inner locking block is provided with a locking tongue, and the outer locking block is provided with a locking hole that cooperates with the locking tongue. The locking tongue is also provided with a limiting hole for cooperating with the locking pin. The locking tongue is inserted into the locking hole, and the outer locking block and the inner locking block are locked and fixed by the locking pin.

2. The upper locking pin in a retractable actuator cylinder as described in claim 1, characterized in that, Both the outer and inner locking blocks are covered with DLC film layers.

3. The upper locking pin in a retractable actuator cylinder as described in claim 1, characterized in that, The outer and inner locking blocks are equipped with DLC film layers arranged using multi-gradient structure DLC film layer technology.

4. The upper locking pin in a retractable actuator cylinder as described in claim 1, characterized in that, The outer locking block also has anti-rotation holes on its side that cooperate with the external structure.

5. The upper locking pin in a retractable actuator cylinder as described in claim 1, characterized in that, The latch has a rectangular structure.

6. The upper locking pin in a retractable actuator cylinder as described in claim 1, characterized in that, The inner locking block is made of 40CrNiMoA material.

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