A stay brake pull rod structure for SR20 flight trainer

Abstract

The utility model relates to flight training device technical field, specifically disclose a kind of stay brake pull rod structure for SR20 flight training device, including the pull rod body of metal structure and the handle of plastic structure;The lower end of pull rod body is used as connecting stay brake simulation system;Handle has the hand-held portion and joint portion of constituting T type structure, and handle is connected in the upper end of pull rod body;Handle has the plastic shell and metal screw sleeve combined as integral structure, and metal screw sleeve is axially embedded in joint portion, and metal screw sleeve forms the threaded hole used as connecting the upper end of pull rod body;The upper end of pull rod body has the pull rod joint matching metal screw sleeve threaded hole, and pull rod body is connected in the metal screw sleeve of joint portion of handle by pull rod joint threaded connection.The utility model satisfies the technical requirement of training use while, the assembly structure between handle and pull rod body is reinforced, obtains high structural strength, not easy to be damaged in inadvertent impact, effectively reduces replacement maintenance frequency and cost.

Description

Technical Field

[0001] This utility model relates to the field of flight training equipment technology, specifically to a parking brake lever structure for the SR20 flight training equipment. Background Technology

[0002] A flight trainer (i.e., a flight training simulator) is a simulation device used for ground training of pilots. It mainly consists of a cockpit, interface equipment, training computer, visual system, motion platform, and various instruments. Trainees can conduct relevant training by operating switches, pushing and pulling throttles, and controlling the flight stick and control surfaces, and can obtain real-time data such as flight speed, altitude, position, and meteorological parameters. The Cirrus SR20 flight trainer is a common teaching device used in aviation teaching environments for training trainees, and it is paired with the trainer aircraft used for later flight training.

[0003] In the structure of the SR20 flight trainer, there is a parking brake lever located in front of the right knee in the cockpit. Because the student's seat is relatively close to the parking brake lever, the student's right knee often inadvertently bumps against the parking brake lever during the actions of entering and sitting down or getting up from the cockpit. This is a relatively frequent phenomenon in the inventor's teaching experience, especially among new students who have not yet developed muscle memory.

[0004] like Figure 1 As shown, the existing parking brake lever used in the SR20 flight training device is mainly composed of a metal lever body 1' and a plastic handle 2', assembled as a whole using a plug-in or threaded assembly structure. The lower end of the lever body is connected to the parking brake simulation system via a joystick. The handle is a T-shaped structure made of rigid plastic, used by the student for gripping and operation. The phenomenon of the parking brake lever being pushed against during the student's actions of entering and sitting down or getting up and leaving the cabin mainly occurs at the handle. Due to the aforementioned molded structure of the parking brake lever, the plastic handle is prone to cracking and breakage at the joint connecting to the lever body, requiring frequent replacement and maintenance. Utility Model Content

[0005] The technical objective of this utility model is to provide a high-strength parking brake lever structure for the SR20 flight trainer, taking into account the special characteristics of the SR20 flight trainer and the shortcomings of the existing technology.

[0006] The technical objective of this utility model is achieved through the following technical solution: a parking brake lever structure for an SR20 flight trainer, comprising a lever body of metal structure and a handle of plastic structure. The lower end of the lever body is used to connect the SR20 flight trainer's parking brake simulation system; The parking brake levers are located inside the cockpit of the SR20 flight trainer. The handle has a handheld part and a connector part that form a T-shaped structure. The handle is connected to the upper end of the lever body. The upper part of the parking brake lever has a T-shaped structure. The handle has a plastic shell and a metal threaded sleeve that are integrated into a single structure, and the metal threaded sleeve is axially fitted into the joint portion of the handle. The metal threaded sleeve forms a threaded hole for connecting the upper end of the pull rod body. The upper end of the pull rod body has a pull rod connector that matches the threaded hole of the metal sleeve, and the pull rod body is threadedly connected to the metal sleeve at the joint of the handle through the pull rod connector.

[0007] Furthermore, the handle also has metal reinforcing ribs, which are arranged laterally within the handgrip of the handle and connected to the metal threaded sleeve in a T-shaped structure. The reinforcing ribs, the metal threaded sleeve, and the plastic shell are combined into an integral structure.

[0008] Furthermore, the reinforcing ribs are embedded inside the plastic outer shell.

[0009] Furthermore, the inner bore of the metal threaded sleeve has a threaded section on the lower side and a smooth section on the upper side, wherein the smooth section is used to stop and limit the pull rod body connected to the threaded section in the axial direction.

[0010] Furthermore, the vertical cross-section of the handle's grip portion is a rectangular structure with rounded corners.

[0011] Furthermore, the pull rod joint at the upper end of the pull rod body protrudes radially from the adjacent pull rod body.

[0012] Furthermore, the tie rod joint is an additional structure that is welded and fixed to the upper end of the tie rod body.

[0013] Furthermore, the pull rod joint has a solid core structure.

[0014] Furthermore, the lower end of the pull rod body has a control lever, and the lower end of the pull rod body is connected to the SR20 flight trainer's parking brake simulation system via the control lever.

[0015] The beneficial technical effects of this utility model are as follows: The above-mentioned technical measures are designed for the special characteristics of the SR20 flight trainer. Without changing the SR20 flight trainer, the handle of the parking brake lever is easily damaged by accidental impacts, and the upper structure of the lever body that matches the handle is optimized to the best of our ability. This not only meets the technical requirements for training use, but also strengthens the assembly structure between the handle and the lever body, achieving high structural strength. It is not easily damaged by accidental impacts, effectively reducing the number of replacements and maintenance and costs. Attached Figure Description

[0016] Figure 1 A structural diagram of the existing parking brake lever for the SR20 flight trainer (disassembled state); Figure 2 This is a structural schematic diagram of the present invention (in an exploded state); Figure 3 for Figure 2 A cross-sectional view of the connection structure between the pull rod and the handle; Figure 4 for Figure 2 A bottom view of the handle structure in the middle; Figure 5 for Figure 2 Side view of the handle structure.

[0017] The meanings of the labels in the diagram are as follows: 1—Pull rod body; 11—Pull rod joint; 12—Control lever; 2—Handle; 21—Handheld part; 22—Joint part; 23—Metal threaded sleeve; 24—Plastic housing; 25—Metal reinforcing rib. Detailed Implementation

[0018] This utility model relates to the field of flight training equipment technology, specifically to a parking brake lever structure for the SR20 flight training equipment. The main technical solution of this utility model will be described in detail below with reference to several embodiments. Embodiment 1, in conjunction with the accompanying drawings, is... Figures 2 to 5 The technical solution of this utility model is clearly and thoroughly explained; although other embodiments are not shown in separate drawings, their main structures can still be referred to the drawings of Embodiment 1.

[0019] It should be noted that the accompanying drawings of this utility model are schematic, and unnecessary details have been simplified to clarify the technical purpose of this utility model, so as to avoid obscuring the technical solution contributed by this utility model to the prior art. In addition, the expressions such as "about" and "basically" regarding quantity or fit relationship in the following text mean that reasonable assembly errors and processing errors are allowed in the industry, and do not literally describe absolute quantity or fit relationship.

[0020] Example 1 See Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this utility model is a parking brake lever structure for the SR20 flight trainer, which includes a metal lever body 1 and a plastic handle 2, which are assembled into a whole by a threaded structure.

[0021] Specifically, the upper end of the lever body 1 serves as a connecting handle 2 and has a lever joint 11. The lower end of the lever body 1 serves as a connection to the SR20 flight trainer's parking brake simulation system and has an axially extending control stick 12. The lever body 1 is connected to the SR20 flight trainer's parking brake simulation system via the control stick 12.

[0022] The handle 2 has a plastic shell 24, a metal threaded sleeve 23, and a reinforcing rib 25 that are assembled as a whole.

[0023] The plastic shell 24 is a rigid plastic molded structure, having a handle portion 21 and a connector portion 22 forming a T-shaped structure. The handle portion 21 is arranged laterally, and to ensure a comfortable grip, it has an upward arched curve in the horizontal direction. This arched curve is similar to the structure of existing handles or other similar handles. However, to enhance the structural strength of the handle while maintaining a comfortable grip, the vertical cross-section of the aforementioned handle portion 21 is a rectangular structure with rounded corners (e.g., ...). Figure 4 and Figure 5 As shown), its outer contour is smooth and without sharp edges, which also helps with safety during use. The connector 22 is located at the bottom of the central area of ​​the handle 21 and extends downward to connect the pull rod body 1. To ensure a stable and high-strength connection to the pull rod body 1 and to eliminate stress concentration in the plastic structure due to the presence of threads, the metal threaded sleeve 23 is axially fitted into the connector 22 of the handle 2, and is distributed concentrically with the connector of the handle 2. Of course, this fitting should be integrally formed when the handle 2 is molded.

[0024] The aforementioned metal threaded sleeve 23 has a threaded hole inside for connecting to the upper end of the aforementioned tie rod body 1. Therefore, the threaded hole of the metal threaded sleeve 23 should match the corresponding joint at the upper end of the aforementioned tie rod body 1. Of course, in order to limit the connection position of the tie rod body 1 within the metal threaded sleeve 23, the threaded hole of the metal threaded sleeve 23 has a threaded section on the lower side and a smooth section on the upper side in the axial direction. The smooth section is used to stop and limit the axial movement of the tie rod body 1 connected to the threaded section.

[0025] To further enhance the structural strength of the handle 2, a metal reinforcing rib 25 is provided in the hand-held part 21 of the handle 2. The reinforcing rib 25 is arranged horizontally in the hand-held part 21 of the handle 2 and is fixedly connected to the metal threaded sleeve 23 in a T-shaped structure. The reinforcing rib 25 is embedded in the plastic shell 24 and is hidden.

[0026] Thus, the overall structure composed of the plastic shell 24, the reinforcing rib 25, and the metal threaded sleeve 23 constitutes the handle 2 used to connect the pull rod body 1.

[0027] To accommodate the structure of the handle 2, the upper end of the lever body 1 is integrally formed with a lever connector 11 that matches the threaded hole of the metal sleeve 23 of the handle 2. Since the lever body is a non-replaceable part of the SR20 flight training device, the lever body 1 retains its original structure. However, based on the enhanced and optimized design of the handle 2 structure, to make the original lever body 1 compatible with the new handle 2, the lever connector 11 of the lever body 1 is a welded addition. To accommodate the structural dimensions of the new handle 2, the lever connector 11 at the upper end of the lever body 1 protrudes radially from the adjacent lever body 1, and the lever connector 11 is a solid structure.

[0028] The pull rod body 1 of the above structure is assembled into a whole with the pull rod joint 11 at the upper end and the handle 2 of the above structure through a threaded structure, and still maintains the upper T-shaped structure of the current parking brake pull rod, which meets the technical requirements for training use.

[0029] Example 2 This utility model is a parking brake lever structure for the SR20 flight trainer, which includes a metal lever body and a plastic handle, which are assembled into a whole by a threaded structure.

[0030] Specifically, the upper end of the lever body serves as a connecting handle and has a lever joint. The lower end of the lever body serves as a connection to the SR20 flight trainer's parking brake simulation system and has an axially extending control stick. The lever body is connected to the SR20 flight trainer's parking brake simulation system via this control stick.

[0031] The handle has a plastic shell and a metal screw thread that are combined into one piece.

[0032] The plastic outer shell is a rigid plastic molding structure with a T-shaped handle and a connector. The handle is arranged horizontally and has an upward arch to ensure a comfortable grip. This arch is similar to existing handles or other similar handles. However, to enhance the structural strength of the handle while maintaining a comfortable grip, the vertical cross-section of the handle is a rounded rectangle with a smooth outer contour and no sharp edges, which also improves safety. The connector is located at the bottom of the central area of ​​the handle and extends downwards to connect to the pull rod body. To ensure a stable and high-strength connection to the pull rod body and to eliminate stress concentration caused by the threads in the plastic structure, a metal threaded sleeve is axially fitted into the connector of the handle, concentrically distributed with the connector. This fitting should be integrally molded during the handle molding process.

[0033] The aforementioned metal threaded sleeve has a threaded hole inside for connecting to the upper end of the aforementioned tie rod body. Therefore, the threaded hole of the metal threaded sleeve should match the corresponding joint at the upper end of the aforementioned tie rod body. Of course, in order to limit the connection position of the tie rod body within the metal threaded sleeve, the threaded hole of the metal threaded sleeve has a threaded section on the lower side and a smooth section on the upper side in the axial direction. The smooth section serves to stop and limit the axial movement of the tie rod body connected to the threaded section.

[0034] To accommodate the aforementioned handle structure, the upper end of the aforementioned lever body has an integrally formed lever connector with a metal threaded hole that matches the handle. Since the lever body is part of the SR20 flight trainer and cannot be easily replaced, the lever body retains its original structure. However, based on the enhanced and optimized design of the aforementioned handle structure, to make the original lever body compatible with the new handle, the lever connector of the lever body is a welded addition. To accommodate the structural dimensions of the new handle, the lever connector at the upper end of the lever body protrudes radially from the adjacent lever body, and the lever connector is a solid structure.

[0035] The pull rod body of the above structure is assembled into a whole with the pull rod joint at the upper end and the handle of the above structure through a threaded structure, and still maintains the upper T-shaped structure of the current parking brake pull rod, which meets the technical requirements for training use.

[0036] Example 3 This utility model is a parking brake lever structure for the SR20 flight trainer, which includes a metal lever body and a plastic handle, which are assembled into a whole by a threaded structure.

[0037] Specifically, the upper end of the lever body serves as a connecting handle and has a lever joint. The lower end of the lever body serves as a connection to the SR20 flight trainer's parking brake simulation system and has an axially extending control stick. The lever body is connected to the SR20 flight trainer's parking brake simulation system via this control stick.

[0038] The handle has a plastic shell, metal threaded sleeve, and reinforcing ribs that are assembled as a whole.

[0039] The plastic outer shell is a rigid plastic molding structure with a T-shaped handle and a connector. The handle is arranged horizontally and has an upward arch to ensure a comfortable grip. This arch is similar to existing handles or other similar handles. However, to enhance the structural strength of the handle while maintaining a comfortable grip, the vertical cross-section of the handle is a rounded rectangle with a smooth outer contour and no sharp edges, which also improves safety. The connector is located at the bottom of the central area of ​​the handle and extends downwards to connect to the pull rod body. To ensure a stable and high-strength connection to the pull rod body and to eliminate stress concentration caused by the threads in the plastic structure, a metal threaded sleeve is axially fitted into the connector of the handle, concentrically distributed with the connector. This fitting should be integrally molded during the handle molding process.

[0040] The metal threaded sleeve has a threaded hole inside for connecting to the upper end of the tie rod body. Therefore, the threaded hole of the metal threaded sleeve should match the corresponding joint at the upper end of the tie rod body.

[0041] To further enhance the structural strength of the handle, a metal reinforcing rib is provided inside the handle's grip portion. This reinforcing rib is arranged horizontally inside the handle's grip portion and is fixedly connected to the metal threaded sleeve in a T-shaped structure. The reinforcing rib is embedded inside the plastic shell and is hidden.

[0042] Thus, the overall structure consisting of the aforementioned plastic shell, reinforcing ribs, and metal threaded sleeve constitutes the handle used to connect the pull rod body.

[0043] To accommodate the aforementioned handle structure, the upper end of the aforementioned pull rod body is integrally formed with a pull rod connector that matches the metal threaded hole of the aforementioned handle. The pull rod connector is a solid structure.

[0044] The pull rod body of the above structure is assembled into a whole with the pull rod joint at the upper end and the handle of the above structure through a threaded structure, and still maintains the upper T-shaped structure of the current parking brake pull rod, which meets the technical requirements for training use.

[0045] The above embodiments are only used to illustrate the present invention and are not intended to limit it.

[0046] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications can still be made to the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.

Claims

1. A parking brake lever structure for an SR20 flight trainer, the parking brake lever being arranged in the cockpit of the SR20 flight trainer, comprising a lever body (1) of metal structure and a handle (2) of plastic structure. The lower end of the lever body (1) is used to connect the SR20 flight trainer's parking brake simulation system; The handle (2) has a hand-held part (21) and a connector part (22) forming a T-shaped structure. The handle (2) is connected to the upper end of the lever body (1). The upper part of the stop brake lever has a T-shaped structure. Its features are: The handle (2) has a plastic shell (24) and a metal threaded sleeve (23) that are integrated into a single structure. The metal threaded sleeve (23) is axially fitted into the joint portion (22) of the handle (2). The metal threaded sleeve (23) forms a threaded hole for connecting the upper end of the pull rod body (1). The upper end of the pull rod body (1) has a pull rod connector (11) that matches the threaded hole of the metal sleeve (23). The pull rod body (1) is threadedly connected to the metal sleeve (23) at the joint (22) of the handle (2) through the pull rod connector (11).

2. The SR20 flight trainer's parking brake lever structure according to claim 1, characterized in that: The handle (2) also has a metal reinforcing rib (25), which is arranged horizontally in the hand-held part (21) of the handle (2) and connected to the metal threaded sleeve (23) in a T-shaped structure. The reinforcing rib (25), the metal threaded sleeve (23), and the plastic shell (24) are combined into an integral structure.

3. The SR20 flight trainer's parking brake lever structure according to claim 2, characterized in that: The reinforcing rib (25) is embedded inside the plastic shell (24).

4. The SR20 flight trainer's parking brake lever structure according to claim 1 or 2, characterized in that: The inner hole of the metal sleeve (23) has a threaded section on the lower side and a smooth hole section on the upper side. The smooth hole section is used to stop and limit the pull rod body (1) connected to the threaded section in the axial direction.

5. The SR20 flight trainer's parking brake lever structure according to claim 1, characterized in that: The handle (2) has a rectangular structure with rounded corners in the vertical cross-section of the hand part (21).

6. The SR20 flight trainer's parking brake lever structure according to claim 1, characterized in that: The tie rod joint (11) at the upper end of the tie rod body (1) protrudes radially from the tie rod body (1) adjacent to it.

7. The SR20 flight trainer's parking brake lever structure according to claim 6, characterized in that: The tie rod joint (11) is an additional structure that is welded and fixed to the upper end of the tie rod body (1).

8. The SR20 flight trainer's parking brake lever structure according to claim 6 or 7, characterized in that: The tie rod joint (11) is a solid structure.

9. The SR20 flight trainer's parking brake lever structure according to claim 1 or 6, characterized in that: The lower end of the pull rod body (1) has a control lever (12), and the lower end of the pull rod body (1) is connected to the SR20 flight trainer's parking brake simulation system through the control lever (12).

Images