Front wheel steering rod limit mechanism

Abstract

The present invention discloses a front wheel steering rod limiting mechanism, comprising: a limiting member, whose surface has a U-shaped groove; a U-shaped member, fixed to the U-shaped groove of the limiting member by bolts; and a Teflon sleeve, comprising two semicircular sleeves, placed in the U-shaped groove of the limiting member; and the U-shaped groove of the limiting member, the U-shaped member and the Teflon sleeve work together to embrace the front wheel steering rod. The front wheel steering rod limiting mechanism provided by the present invention has a simple structure, few parts, easy assembly and disassembly, and strong versatility, and meets the limiting design and installation requirements of most aircraft front wheel steering rods.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft front wheel steering control systems, in particular to a simple front wheel steering rod limiting mechanism. Background Art

[0002] In the front wheel steering control system with steering rod of traditional aircraft, the fixing or limiting of the steering rod generally adopts the structure of metal flange or end cover and embedded bearing. This structure has large volume and weight, short bearing life and poor maintainability, which is not conducive to the fixed installation of the steering rod of the front wheel steering control system of the aircraft and meeting the requirements of lightweight structure. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The present invention provides a simple front wheel steering rod limiting mechanism to at least partially solve the above-mentioned technical problems.

[0005] (II) Technical solution

[0006] The present invention provides a front wheel steering rod limiting mechanism, comprising:

[0007] The limiting member 110 has a U-shaped groove on one side;

[0008] The U-shaped member 120 is fixed to the U-shaped groove of the limiting member 110 by bolts; and

[0009] The Teflon sleeve 130 includes two semicircular sleeves and is placed in the U-shaped groove of the stopper 110;

[0010] Furthermore, the U-shaped groove of the limiting member 110 , the U-shaped member 120 and the Teflon sleeve 130 work together to embrace the front wheel steering rod 200 .

[0011] In some embodiments of the present invention, the limiting member 110 is a rectangular parallelepiped part, and the bottom of the U-shaped groove thereof has a first boss.

[0012] In some embodiments of the present invention, when the U-shaped member 120 is fixed on the limiting member 110, the U-shaped opening direction of the U-shaped member 120 is opposite to the U-shaped opening direction of the U-shaped groove of the limiting member 110 and the bottom of the inner wall of the U-shaped opening of the U-shaped member 120 has a second boss.

[0013] Furthermore, when the U-shaped member 120 is fixed on the limiting member 110 , the first boss and the second boss are on the same horizontal plane.

[0014] In some embodiments of the present invention, a Teflon sleeve 130 is placed on the first boss and the second boss, and a Teflon coating is provided on the inner wall surface of the Teflon sleeve 130 , and the outer wall of the Teflon sleeve 130 fits the inner wall of the opening of the U-shaped groove of the stopper 110 and the inner wall of the opening of the U-shaped member 120 .

[0015] In some embodiments of the present invention, the front wheel steering rod limiting mechanism is a front wheel steering rod limiting mechanism of an aircraft, and the limiting member 110 is fixed between the engine firewall 300, the bulkhead 400 and the longitudinal stringer 500 of the aircraft by bolts.

[0016] (III) Beneficial effects

[0017] It can be seen from the above technical solution that the front wheel steering rod limiting mechanism provided by the present invention has at least one of the following beneficial effects:

[0018] (1) The front wheel steering rod limiting mechanism includes a limiting member, a U-shaped member and a Teflon sleeve, which has a simple structure, few parts and light weight;

[0019] (2) The front wheel steering rod limit mechanism is easy to load and unload, has strong versatility, and meets the limit design and installation requirements of the front wheel steering rods of most aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an isometric view of the front wheel steering rod limiting mechanism in an embodiment of the present invention;

[0021] Figure 2 An isometric exploded view of a front wheel steering rod limiting mechanism in an embodiment of the present invention;

[0022] Figure 3 and Figure 4 1. A front view and a top view of a limiting member in a limiting mechanism of a front wheel steering rod in an embodiment of the present invention;

[0023] Figure 5 , Figure 6 and Figure 7 The front view, top view and side view of the U-shaped member in the front wheel steering rod limiting mechanism in the embodiment of the present invention;

[0024] Figure 8 It is a front view of a Teflon sleeve in the front wheel steering rod limiting mechanism in an embodiment of the present invention;

[0025] Figure 9-12 Schematic diagram of the installation sequence of the front wheel steering rod limiting mechanism in an embodiment of the present invention;

[0026] Fig.13 1 is an installation diagram of the front wheel steering rod limiting mechanism in an embodiment of the present invention.

[0027] In the figure:

[0028] 100-front wheel steering rod limiting mechanism 110-limiting member 120-U-shaped member

[0029] 130-Teflon bushing 200-Front wheel steering rod 300-Firewall

[0030] 400-skin 500-stringer DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0032] Certain embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all, embodiments are shown. Indeed, various embodiments of the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure may satisfy applicable legal requirements.

[0033] In an exemplary embodiment of the present invention, a simple front wheel steering rod limiting mechanism is provided.

[0034] Figure 1 and Figure 2 The following is an isometric view and an exploded view of a simple front wheel steering rod limiting mechanism according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, the front wheel steering rod limiting mechanism provided in this embodiment includes:

[0035] The limiting member 110 has a U-shaped groove on one side;

[0036] The U-shaped member 120 is fixedly connected to the limiting member 110 by bolts; and

[0037] The Teflon sleeve 130 includes two semicircular sleeves and is placed in the U-shaped groove of the stopper 110;

[0038] Furthermore, the U-shaped groove of the limiting member 110 , the U-shaped member 120 and the Teflon sleeve 130 work together to embrace the front wheel steering rod 200 .

[0039] The following describes in detail the various components of the front wheel steering rod limiting mechanism provided in this embodiment.

[0040] Figure 3 , Figure 4 The figure is a front view and a top view of the limiting component in a simple front wheel steering rod limiting mechanism. Figure 3-Figure 4As shown, in this embodiment, the limiting member 110 is a rectangular parallelepiped part, one side of which is provided with a U-shaped groove, and the bottom of the groove is provided with a boss (ie, a first boss) to prevent the Teflon sleeve 130 from falling off.

[0041] It should be noted that the shape of the limiter 110 may also be other shapes besides a rectangular parallelepiped, and the material used to construct it is not limited to metal materials. This is just an embodiment, and the specific shape and material selection may depend on the actual situation.

[0042] Figure 5-Figure 7 The following are the front view, top view and side view of the U-shaped part in the simple front wheel steering rod limiting mechanism. Figure 5-Figure 7 As shown, the U-shaped member 120 has an opening, and the opening slides backward into the U-shaped groove of the limiting member 110 to fit its shape and together embrace the steering rod. At this time, the most preferred situation is that the U-shaped opening direction of the U-shaped member 120 is exactly opposite to the U-shaped opening direction of the U-shaped groove of the limiting member 110, and then the U-shaped member 120 is fixedly connected to the limiting member 110 by bolts.

[0043] In some embodiments, a boss (i.e., a second boss) is provided at the bottom of the inner wall of the U-shaped opening of the U-shaped member 120. Preferably, when the U-shaped member 120 is fixed on the limiting member 110, the first boss and the second boss are on the same horizontal plane, and the Teflon sleeve 130 is placed on the first boss and the second boss, which can effectively prevent the Teflon sleeve 130 from falling and ensure smooth operation during operation.

[0044] Figure 8 This is a front view of the Teflon bushing in the simple front wheel steering rod limit mechanism. Figure 8 As shown, the Teflon sleeve 130 includes two semicircular metal sleeves as shown in the figure, which are placed in the grooves of the limiting member 110 and the U-shaped member 120.

[0045] In some embodiments, the inner wall surface of the Teflon sleeve 130 is coated with a Teflon coating so that it fits the front wheel steering rod 200 to reduce steering friction. The outer wall of the Teflon sleeve 130 fits the opening inner wall of the U-shaped groove of the limit member 110 and the opening inner wall of the U-shaped member 120.

[0046] Figure 9-12 FIG. 1 is a schematic diagram of the installation sequence of a simple front wheel steering rod limiting mechanism in an embodiment of the present invention. Figure 9-12As shown, first, place the U-shaped member 120 under the bulkhead 400, slide the front wheel steering rod 200 from the side, and rotate the U-shaped member so that the opening faces the tail direction; secondly, place the U-shaped groove of the limiting member 110 facing the nose direction between the longitudinal girder 500 and the bulkhead 400, slide the front wheel steering rod 200, and fit with the U-shaped member 120 to embrace the front wheel steering rod 200; then put the two halves of the Teflon bushing 130 into the groove from top to bottom along the front wheel steering rod 200; finally, fit and pre-tighten the limiting member 110, the U-shaped member 120, the Teflon bushing 130 and the front wheel steering rod 200, and fix the U-shaped member 120 on the limiting member 110 by bolts.

[0047] Fig.13 This is a diagram of a simple front wheel steering lever limiting mechanism after installation in an embodiment of the present invention.

[0048] like Fig.13 As shown, in this embodiment, the front wheel steering rod limiting mechanism is the front wheel steering rod limiting mechanism of the aircraft, and the limiting member 110 of the limiting mechanism 100 is fixed between the engine firewall 300, the bulkhead 400 and the longitudinal stringer 500 of the aircraft by bolts, and the installation is completed.

[0049] It should be noted that, during actuation, the front wheel steering rod 200 is rotated by the force or torque output by the servo steering gear, driving the front wheel of the landing gear to complete the steering operation, and deformation will occur when the force is applied.

[0050] It should be noted that, when actuated, the limiting mechanism 100 constrains the in-plane linear displacement caused by the deformation of the front wheel steering rod 200 .

[0051] It should be noted that, during operation, the Teflon coating of the Teflon sleeve 130 is a smooth coating with a very small friction coefficient, thereby ensuring the normal rotation of the front wheel steering rod 200 .

[0052] At this point, the front wheel steering rod limiting mechanism of one embodiment of the present invention is completed.

[0053] So far, the embodiments of the present invention have been described in detail in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the front wheel steering rod limiting mechanism of the present invention.

[0054] It should be noted that the implementation methods not shown or described in the drawings or the text of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of various elements and methods are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0055] In summary, the present invention provides a front wheel steering rod limiting mechanism, including a limiting member, a U-shaped member and a Teflon bushing. The limiting member is installed between the engine firewall, the bulkhead and the stringer, and the U-shaped member slides into the U-shaped groove of the limiting member with its opening facing backward to embrace the steering rod and is fixed with bolts. The Teflon bushing is installed in the U-shaped groove, and the Teflon surface coating fits the front wheel steering rod to reduce steering friction. The three parts together constitute the front wheel steering rod limiting mechanism, which limits the displacement of the front wheel steering rod under force. The front wheel steering limiting mechanism of the present invention has a simple structure, few parts, is easy to load and unload, and has strong versatility, and meets the limiting design and installation requirements of the front wheel steering rod of most aircraft.

[0056] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure.

[0057] Moreover, the shapes and sizes of the components in the figures do not reflect the real size and proportion, but only illustrate the contents of the embodiments of the present disclosure. In addition, in the claims, any reference symbols between brackets shall not be constructed as limiting the claims.

[0058] Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

[0059] Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various disclosed aspects, in the above description of exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the following intention: that the claimed invention requires more features than the features explicitly recited in each claim. More specifically, as reflected in the claims below, the disclosed aspects lie in less than all the features of the single embodiment disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present disclosure.

[0060] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A front wheel steering rod limiting mechanism, characterized in that: include: A limiting member (110), wherein one side of the limiting member (110) has a U-shaped groove; A U-shaped member (120) is fixed to the U-shaped groove of the limiting member (110) by means of bolts; as well as A Teflon sleeve (130), comprising two semicircular sleeves, is placed in the U-shaped groove of the limiting member (110); Furthermore, the U-shaped groove of the limiting member (110), the U-shaped member (120) and the Teflon sleeve (130) work together to embrace the front wheel steering rod (200); The bottom of the U-shaped groove of the limiting member (110) has a first boss; the bottom of the inner wall of the U-shaped opening of the U-shaped member (120) has a second boss; When the U-shaped member (120) is fixed on the limiting member (110), the first boss and the second boss are on the same horizontal plane; The Teflon sleeve (130) is placed on the first boss and the second boss; and The limiting component (110) is a rectangular parallelepiped component.

2. The front wheel steering rod limiting mechanism according to claim 1, characterized in that: The front wheel steering rod limiting mechanism is a front wheel steering rod limiting mechanism of an aircraft.

3. The front wheel steering rod limiting mechanism according to claim 1, characterized in that: When the U-shaped member (120) is fixed on the limiting member (110), the U-shaped opening direction of the U-shaped member (120) is opposite to the U-shaped opening direction of the U-shaped groove of the limiting member (110).

4. The front wheel steering rod limiting mechanism according to claim 1 or 3, characterized in that: The inner wall surface of the Teflon sleeve (130) is provided with a Teflon coating.

5. The front wheel steering rod limiting mechanism according to claim 1, characterized in that: The outer wall of the Teflon sleeve (130) fits against the inner wall of the opening of the U-shaped groove of the limiting member (110) and the inner wall of the opening of the U-shaped member (120).

6. The front wheel steering rod limiting mechanism according to claim 1, characterized in that: The limiting member (110) is fixed between the engine firewall (300), the bulkhead (400) and the longitudinal stringer (500) of the aircraft by means of bolts.

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