Steering ring, steering device and undercarriage
By designing a bushing in the steering ring and injecting lubricating medium into the annular cavity formed by the bushing and the body, the problem of frequent replacement of wear-resistant parts in existing landing gear steering structures is solved, achieving self-lubrication and improving the durability and safety of the landing gear.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 微至航空科技(北京)有限公司
- Filing Date
- 2025-06-17
- Publication Date
- 2026-04-28
AI Technical Summary
The existing landing gear steering structure requires frequent replacement of wear-resistant structural components, which can easily lead to mechanical friction gaps and pose safety hazards.
Design a steering ring including a body and a bushing, with an annular cavity formed between the bushing and the body. A lubricating medium is injected through a channel, and the lubricating medium is coated on the surface of the support during rotation to achieve self-lubrication and reduce mechanical wear.
It achieves a self-lubricating function, reduces maintenance difficulty, improves durability and safety, reduces mechanical wear, and is low in cost and easy to maintain.
Smart Images
Figure CN224171167U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of landing gear technology, and in particular to a steering ring, a steering device and a landing gear. Background Technology
[0002] The existing landing gear steering structure is mainly a dry friction steering structure, which involves adding metal or polymer wear-resistant materials to the landing gear struts and fuselage components. During steering, the main shaft struts rub against the wear-resistant materials. This steering structure is relatively simple and easy to implement, but it requires frequent replacement of wear-resistant structural components and is prone to mechanical friction gaps, which can lead to safety hazards. Utility Model Content
[0003] In view of this, one objective of this utility model is to provide a steering ring to improve durability and safety. Another objective of this utility model is to provide a steering device including the aforementioned steering ring. Yet another objective of this utility model is to provide a landing gear including the aforementioned steering device.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A steering ring, comprising:
[0006] The body has a sleeve hole, and the outer surface of the body is provided with a channel that extends through the wall of the sleeve hole, the channel being used for injecting a lubricating medium;
[0007] A bushing is located in the bushing hole. An annular cavity for accommodating the lubricating medium is formed between the outer wall of the bushing and the wall of the bushing hole. A through hole communicating with the annular cavity is provided on the inner wall of the bushing.
[0008] Optionally, in the aforementioned steering ring, the outer wall of the bushing is provided with an annular groove surrounding the centerline of the bushing.
[0009] Optionally, in the above-mentioned steering ring, the outline of the cross-section of the ring groove is arc-shaped.
[0010] Optionally, in the aforementioned steering ring, the wall of the bushing is provided with at least one groove, and at least one of the grooves is connected to the channel.
[0011] Optionally, the steering ring described above includes an injection nozzle mounted on the channel and protruding from the outer surface of the body, the injection nozzle being used to inject the lubricating medium into the ring cavity.
[0012] Optionally, in the above-mentioned steering ring, there are two or more injection nozzles, and the injection nozzles are distributed circumferentially along the sleeve hole.
[0013] Optionally, in the above-mentioned steering ring, the body is configured as a split structure, including a first split and a second split that are connected by a mating joint, and the plane on which the mating surfaces of the first split and the second split are located is the radial surface of the sleeve hole.
[0014] Optionally, in the aforementioned steering ring, the bushing includes a first bushing and a second bushing arranged symmetrically, both of which are semi-circular.
[0015] A steering device includes a column and a steering ring as disclosed in any of the preceding claims, the steering ring being rotatably fitted onto the column.
[0016] A landing gear includes a steering servo and the steering device disclosed above, wherein the steering servo is kinetically connected to the steering ring for driving the steering ring to rotate relative to the column.
[0017] The steering ring provided by this utility model has the following beneficial effects:
[0018] Because an annular cavity for accommodating lubricating medium is formed between the outer wall of the bushing and the wall of the bore in the main body, and a channel penetrating to the wall of the bore is provided on the outer surface of the main body, and a through hole communicating with the annular cavity between the bushing and the main body is provided on the inner wall of the bushing, lubricating medium can be pre-injected into the annular cavity between the bushing and the main body through the channel on the main body for storage. During the rotation of the steering ring relative to the support it is rotatably fitted with, the lubricating medium in the annular cavity can contact the surface of the support through the through hole on the bushing, and be coated onto the surface of the support as the steering ring rotates, thus lubricating the sliding fit between the support and the bushing. Therefore, by adopting the steering ring of this invention, during a routine maintenance process, only a quantitative amount of lubricating medium needs to be added to achieve the system's internal self-lubrication function, greatly reducing maintenance difficulty and minimizing mechanical wear. It features low engineering implementation difficulty, low cost, high durability, and high safety. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0020] Figure 1 This is a perspective view of the steering ring according to an embodiment of the present utility model;
[0021] Figure 2 yes Figure 1 An exploded schematic diagram of the steering ring shown.
[0022] Figure 3 yes Figure 1 The front view of the steering ring shown;
[0023] Figure 4 yes Figure 3 The left view;
[0024] Figure 5 yes Figure 2 A three-dimensional schematic diagram of the first component;
[0025] Figure 6 yes Figure 5 A partially enlarged schematic diagram of the structure shown;
[0026] Figure 7 yes Figure 5 Top view of the first component shown;
[0027] Figure 8 yes Figure 5 A three-dimensional schematic diagram of the first component shown from another perspective;
[0028] Figure 9 yes Figure 2 A three-dimensional schematic diagram of the second part;
[0029] Figure 10 yes Figure 9 The top view of the second component shown;
[0030] Figure 11 yes Figure 9 A three-dimensional schematic diagram of the second component shown from another perspective;
[0031] Figure 12 yes Figure 9 A three-dimensional schematic diagram of the second component shown from another perspective;
[0032] Figure 13 yes Figure 2 A three-dimensional schematic diagram of the first lining tile;
[0033] Figure 14 yes Figure 13 The front view of the first lining tile shown;
[0034] Figure 15 yes Figure 14 The left view;
[0035] Figure 16 This is a schematic diagram of the landing gear according to an embodiment of the present utility model;
[0036] Figure 17 yes Figure 16 The diagram shows a partial disassembly of the landing gear at the steering ring position.
[0037] The diagram is marked as follows:
[0038] 100. Main body; 110. First component; 120. Second component;
[0039] 111. First groove; 112. First mating surface; 113. First fixing hole; 114. First connecting part; 115. First channel; 116. First weight-reducing groove; 117. First leakage hole;
[0040] 121. Second groove; 122. Second mating surface; 123. Second fixing hole; 124. Second connecting part; 125. Second channel; 126. Second weight-reducing groove; 127. Second leakage hole;
[0041] 200. Bushing; 210. First liner; 211. Through hole; 212. Annular groove; 213. Flange; 220. Second liner;
[0042] 300, Injection nozzle; 400, Fastener; 500, Column; 501, Third groove; 600, Steering servo; 700, Steering ring. Detailed Implementation
[0043] 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.
[0044] See Figures 1-15 This utility model provides a steering ring, including a body 100 and a bushing 200. The body 100 has a bushing hole, and the outer surface of the body 100 is provided with a channel extending to the wall of the bushing hole for injecting lubricating medium. The bushing 200 is located in the bushing hole of the body 100, and an annular cavity for containing lubricating medium is formed between the outer wall of the bushing 200 and the wall of the bushing hole. The inner wall of the bushing 200 is provided with a through hole 211 communicating with the annular cavity between the bushing 200 and the body 100.
[0045] The working principle of the steering ring of this utility model is as follows: the steering ring is rotatably sleeved on the support body (such as the main shaft support of the landing gear) through the bushing 200, and is connected to the drive device and the target body (such as the wheel of the landing gear) through the body 100 to achieve steering. Under the driving force of the drive device, the steering ring rotates relative to the support body, and the target body rotates together with the body 100, thereby realizing the rotational movement of the target body relative to the support body, that is, the target body achieves steering movement.
[0046] Because an annular cavity for accommodating lubricating medium is formed between the outer wall of the bushing 200 and the wall of the bore in the body 100, and a channel penetrating to the wall of the bore is provided on the outer surface of the body 100, and a through hole 211 communicating with the annular cavity between the bushing 200 and the body 100 is provided on the inner wall of the bushing 200, lubricating medium can be pre-injected into the annular cavity between the bushing 200 and the body 100 through the channel on the body 100 for storage. During the rotation of the steering ring relative to the support, the lubricating medium in the annular cavity can contact the surface of the support through the through hole 211 on the bushing 200, and be coated on the surface of the support as the steering ring rotates, thus lubricating the rotating fit pair between the support and the bushing 200. After adopting the steering ring of this utility model, during a routine maintenance, only a quantitative amount of lubricating medium needs to be added to achieve the self-lubricating function of the system, greatly reducing maintenance difficulty and reducing mechanical wear. It has the characteristics of low engineering implementation difficulty, low cost, high durability and safety.
[0047] In some embodiments, the outer wall of the bushing 200 is provided with an annular groove 212 surrounding the axis of the bushing 200. The annular groove 212 is located on the outer surface of the bushing 200, that is, on the side of the bushing 200 facing the bore wall of the body 100, and the annular groove 212 extends circumferentially along the bushing 200. By providing the annular groove 212, the volume of the annular cavity between the bushing 200 and the body 100 can be increased, thereby facilitating the storage of a larger amount of lubricating medium. In some embodiments, the lubricating medium may be grease or lubricating oil.
[0048] In the foundation where the outer wall of the bushing 200 is provided with an annular groove 212, the outline of the cross section of the annular groove 212 can be selected in various ways. For example, the outline of the cross section of the annular groove 212 can be arc-shaped (or called C-shaped), V-shaped, right-angled U-shaped (i.e., U-shaped with two right-angle bends), etc.
[0049] In some embodiments, the wall of the bushing may have at least one groove, and at least one groove is connected to the channel of the body 100. As mentioned above, the channel of the body 100 is used to inject lubricating medium. By opening a groove on the surface of the bushing of the body 100 that is connected to the channel, the lubricating medium in the channel can flow quickly away from the channel along the groove after flowing into the annular cavity between the bushing 200 and the body 100, thereby filling the entire annular cavity more quickly.
[0050] In some embodiments, the steering ring may include a filling nozzle 300 mounted on the channel and protruding from the outer surface of the body 100, the filling nozzle 300 being used to fill the annular cavity between the bushing 200 and the body 100 with lubricating medium. It should be understood that the filling nozzle 300 is a commercially available, mature product that can be easily connected to a pipeline for conveying lubricating medium, thereby improving the efficiency of filling the annular cavity with lubricating medium.
[0051] In some embodiments, there may be two or more injection nozzles 300, and the injection nozzles 300 are distributed circumferentially along the sleeve hole of the body 100. With this arrangement, during maintenance, the injection nozzle 300 with a larger operating space can be selected to complete the injection of lubricating medium. As the steering ring rotates, the position of the injection nozzle 300 in the actual space will change, and it may stop in a position close to other surrounding components during maintenance. By setting two or more injection nozzles 300 distributed circumferentially along the sleeve hole of the body 100, more injection nozzles 300 can be selected by the operator. At this time, the operator can select the injection nozzle 300 with a larger distance from other surrounding components, making it more convenient to connect pipelines and perform other operations.
[0052] See Figures 1-12 In some embodiments, the body 100 can be configured as a split structure, including a first split 110 and a second split 120 that are connected by mating. The plane containing the mating surfaces of the first split 110 and the second split 120 is the radial surface of the sleeve hole. It is easy to understand that the first split 110 has two first mating surfaces 112, and the second split 120 has two second mating surfaces 122. When the first split 110 and the second split 120 are connected by mating, the first mating surfaces 112 and the second mating surfaces 122 fit together in a one-to-one correspondence. Then, the first split 110 and the second split 120 can be fixedly connected together by fasteners 400 (e.g., bolts, screws, etc.). Of course, in other embodiments, the body 100 of the steering ring can also be configured as a single piece, that is, the body 100 is composed of a single part.
[0053] See Figures 5-8The first split body 110 may have a first fixing hole 113 for installing the fastener 400 at the location of the first mating surface 112. A portion of the aforementioned sleeve hole is formed by the inner sidewall of the first split body 110, so a first groove 111 may be formed on the inner sidewall of the first split body 110. In some embodiments, the outer sidewall of the first split body 110 may have an outwardly protruding first connecting portion 114, which may be used to connect with a drive device for driving the rotating ring. To reduce the weight of the first split body 110, the first split body 110 may have a first weight-reducing groove 116, the depth direction of the first weight-reducing groove 116 being parallel to the axis of the sleeve hole of the body 100. Based on the first weight-reducing groove 116, to prevent rainwater and other debris from accumulating in the first weight-reducing groove 116, a first drain hole 117 may be formed at the bottom of the first weight-reducing groove 116, so that rainwater and other debris in the first weight-reducing groove 116 can be discharged in time to avoid accumulation.
[0054] See Figures 9-12 The second split body 120 may have a second fixing hole 123 for installing the fastener 400 at the location of the second mating surface 122. A portion of the aforementioned sleeve hole is formed by the inner sidewall of the second split body 120, so a second groove 121 may be formed on the inner sidewall of the second split body 120. In some embodiments, the outer sidewall of the second split body 120 may have an outwardly protruding second connecting portion 124, which can be used to connect with a target body that rotates together with the rotating ring. To reduce the weight of the second split body 120, a second weight-reducing groove 126 may be provided, the depth direction of which is parallel to the axis of the sleeve hole of the body 100. Based on the provision of the second weight-reducing groove 126, to prevent rainwater and other debris from accumulating in the second weight-reducing groove 126, a second drain hole 127 may be provided at the bottom of the second weight-reducing groove 126, so that rainwater and other debris in the second weight-reducing groove 126 can be discharged in time to prevent accumulation.
[0055] It should be noted that after the first mating surface 112 of the first split body 110 is fitted with the second mating surface 122 of the second split body 120, the first groove 111 on the first split body 110 and the second groove 121 on the second split body 120 are connected, that is, the positions of the first groove 111 and the second groove 121 on the mating surfaces of the two split bodies correspond to each other. The channel of the body 100 can be provided on either the first split body 110 or the second split body 120, or a channel for injecting lubricating medium can be provided on both the first split body 110 and the second split body 120. For example, the first split body 110 is provided with a first channel 115, and the second split body 120 is provided with a second channel 125.
[0056] Based on the split structure of the main body 100, the bushing 200 may include a symmetrically arranged first bushing 210 and a second bushing 220, both of which are semi-circular. Figures 1-3 As shown, the first liner 210 is installed on the inner wall of the first segment 110, and the second liner 220 is installed on the inner wall of the second segment 120. The first liner 210 and the second liner 220 fit together to form a complete circular bushing 200. Of course, in other embodiments, the bushing 200 can also be set as an integral piece, that is, the bushing 200 is composed of a single part.
[0057] The symmetrical arrangement of the first liner tile 210 and the second liner tile 220 means that their structural forms are symmetrical about their mating ends. For ease of description, only the first liner tile 210 will be used as an example below; the structure of the second liner tile 220 can be understood in conjunction with the description of the first liner tile 210. See also... Figures 13-15 In some embodiments, the first liner 210 may have three through holes 211. Of course, in other embodiments, the number of through holes 211 on the first liner 210 may be other values, such as one or two. The through holes 211 can be set to... Figure 14 Besides the circle shown, other shapes such as square and triangle can also be used. In some embodiments, the end face of the first liner 210 may be provided with an outwardly protruding flange 213. The flange 213 is used to close the end face of the annular cavity between the bushing 200 and the body 100 after the first liner 210 is installed on the inner wall of the first split body 110. Of course, in other embodiments, the end face of the annular cavity may also be closed by other structures, such as an inwardly protruding structure of the first split body 110.
[0058] Based on the steering ring provided by this utility model, this utility model also provides a steering device, which may include a column 500 and a steering ring as described in any of the above embodiments, wherein the steering ring is rotatably sleeved on the column 500. The structural form of the steering ring can be referred to the preceding description of the steering ring, and will not be repeated here. Since the steering ring disclosed in the above embodiments has the aforementioned technical effects, the steering device having this steering ring also has the aforementioned technical effects, and will not be repeated here.
[0059] In addition, based on the aforementioned steering mechanism, this utility model also provides a landing gear, see [link to relevant documentation]. Figure 16 and Figure 17The bogie includes a steering servo 600 and the aforementioned steering device. The steering servo 600 is kinetically connected to the steering ring 700 and is used to drive the steering ring to rotate relative to the column 500. In some embodiments, the column 500 of the steering device can be a damping cylinder that dampens the wheels of the landing gear. To enable the lubricating medium to more adequately lubricate the rotating joint formed by the column 500 and the steering ring 700, a third groove 501 can be provided on the surface of the column 500 at the position corresponding to the steering ring 700. The third groove 501 can be configured as an annular groove surrounding the axis of the column 500.
[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0061] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A steering ring, characterized in that, include: The body has a sleeve hole, and the outer surface of the body is provided with a channel that extends through the wall of the sleeve hole, the channel being used for injecting a lubricating medium; A bushing is located in the bushing hole. An annular cavity for accommodating the lubricating medium is formed between the outer wall of the bushing and the wall of the bushing hole. A through hole communicating with the annular cavity is provided on the inner wall of the bushing.
2. The steering ring according to claim 1, characterized in that, The outer wall of the bushing is provided with an annular groove around the centerline of the bushing.
3. The steering ring according to claim 2, characterized in that, The cross-sectional profile of the annular groove is arc-shaped.
4. The steering ring according to claim 1, characterized in that, The wall of the sleeve hole has at least one groove, and at least one of the grooves is connected to the channel.
5. The steering ring according to claim 1, characterized in that, Includes an injection nozzle mounted on the channel and protruding from the outer surface of the body, the injection nozzle being used to inject the lubricating medium into the annular cavity.
6. The steering ring according to claim 5, characterized in that, The injection nozzle is provided in two or more parts, and the injection nozzle is distributed circumferentially along the sleeve hole.
7. The steering ring according to any one of claims 1 to 6, characterized in that, The main body is configured as a split structure, including a first split and a second split that are connected by a butt joint, and the plane on which the butt joint surfaces of the first split and the second split are located is the radial surface of the sleeve hole.
8. The steering ring according to claim 7, characterized in that, The bushing includes a first liner and a second liner arranged symmetrically, both of which are semi-circular.
9. A steering device, characterized in that, It includes a column and a steering ring as described in any one of claims 1 to 8, the steering ring being rotatably fitted onto the column.
10. A landing gear, characterized in that, It includes a steering servo and a steering device as described in claim 9, wherein the steering servo is tractively connected to the steering ring and is used to drive the steering ring to rotate relative to the column.