Torque limiting mechanism with buffering function

Abstract

The application belongs to the field of torque limiter of aerospace vehicle, and particularly relates to a torque limiting mechanism with buffering function. The torque limiting mechanism comprises two left and right input shafts, an energy absorption component, two left and right torque limiting assemblies and a disc spring supporting sleeve. The disc spring supporting sleeve supports the two left and right torque limiting assemblies. The left end of the left input shaft and the right end of the right input shaft are arranged in the housing through the two left and right torque limiting assemblies. The energy absorption component is arranged on the disc spring supporting sleeve and between the two left and right torque limiting assemblies.

Description

Technical Field

[0001] This invention belongs to the field of torque limiters for aircraft and aerospace vehicles, and specifically relates to a torque limiting mechanism with a buffer function. Background Technology

[0002] High-lift systems typically include leading-edge slats and trailing-edge flaps. When a jamming fault occurs in the transmission lines of a high-lift system, the power drive unit continues to operate the transmission lines because the fault cannot be detected. At this point, the jamming torque on the transmission lines exceeds the strength of the transmission structure, leading to transmission line breakage and affecting flight safety. Traditional aircraft transmission lines passively use mechanical torque limiting devices to prevent overload torque from acting on the transmission lines when a jamming fault occurs. While existing torque limiting mechanisms can limit the upper limit of the load at the rear end, the impact load generated during braking is still transmitted to the mechanical structure at the front end of the torque limiting mechanism. This necessitates that the front-end mechanical structure's strength design consider the impact load, resulting in a heavier product. Summary of the Invention

[0003] Purpose of the invention: A torque limiting mechanism with buffering function is provided to absorb braking impact loads.

[0004] Technical solution: A torque limiting mechanism with a buffer function includes: two input shafts (left and right), an energy-absorbing component, two torque limiting components (left and right), and a disc spring support sleeve. The disc spring support sleeve supports the two torque limiting components. The right end of the left input shaft and the left end of the right input shaft are respectively disposed in the housing through the two torque limiting components. The energy-absorbing component is disposed on the disc spring support sleeve and located between the two torque limiting components.

[0005] Furthermore, the energy-absorbing component is a ring spring assembly.

[0006] Furthermore, the two torque limiting components are identical and each includes: a stationary sleeve 203, an inner raceway disc 211, a steel ball 212, an outer raceway disc 213, a moving friction plate 214, a stationary friction plate 215, and a disc spring assembly 218. The inner raceway disc 211, the steel ball 212, and the outer raceway disc 213 are pressed together by an axial disc spring assembly 218, a disc spring support sleeve 219, and a slotted screw 220. The moving friction plate 214 and the outer raceway disc 213 are connected by a spline, and the stationary friction plate 215 and the stationary sleeve 203 are connected by a spline.

[0007] Furthermore, the left-side torque limiting assembly includes: a stationary sleeve 203, an inner ball track disc 211, a steel ball 212, an outer ball track disc 213, a dynamic friction plate 214, and a stationary friction plate 215. The inner ball track disc 211, the steel ball 212, and the outer ball track disc 213 are pressed together by a disc spring support sleeve 219 and a slotted screw 220. The dynamic friction plate 214 and the outer ball track disc 213 are connected by a spline, and the stationary friction plate 215 and the stationary sleeve 203 are connected by a spline. The right-side torque limiting assembly includes: a stationary sleeve 203, an inner raceway disc 211, a steel ball 212, an outer raceway disc 213, a moving friction plate 214, a stationary friction plate 215, and a disc spring assembly 218. The inner raceway disc 211, the steel ball 212, and the outer raceway disc 213 are pressed together by the axial disc spring assembly 218, the disc spring support sleeve 219, and the slotted screw 220. The moving friction plate 214 and the outer raceway disc 213 are connected by a spline, and the stationary friction plate 215 and the stationary sleeve 203 are connected by a spline.

[0008] Furthermore, the input shaft 101 is supported by two deep groove ball bearings 201 between itself and the housing.

[0009] Furthermore, the two ends of the ball socket formed by the inner ball socket 211 and the outer ball socket 213 are symmetrical, and the angle and position of the ball socket ensure that the steel ball cannot climb out of the bottom of the ball socket before the transmission of super torque.

[0010] Furthermore, the torque limiting assembly includes three evenly distributed steel balls 212.

[0011] Furthermore, when the torque limiting device transmits torque normally, the buffer function of the energy-absorbing component is not triggered.

[0012] Furthermore, when the torque transmitted by the right-side torque limiting device exceeds the normal torque, the energy-absorbing component is triggered by the right-side torque limiting component to buffer the torque.

[0013] Furthermore, when the torque transmitted by the left torque limiting device exceeds the normal torque, the energy-absorbing component is triggered by the left torque limiting component to buffer the torque.

[0014] Beneficial effects: This patent provides a torque limiting mechanism with a buffer function. This mechanism adds a buffer function to the traditional torque limiting mechanism. When the system experiences a jamming fault and generates an overload torque, the torque limiting mechanism with a buffer function uses an energy-absorbing component set inside to absorb the impact load during the braking process, thereby reducing the load acting on the front mechanical structure of the torque limiting mechanism and effectively reducing the product weight.

[0015] This technology can be widely used in various mechanisms that require torque limiting. It has a simple structure, is easy to process and assemble, and offers considerable economic benefits. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional outline of the torque limiting mechanism with buffering function of the present invention; Figure 2 This is a cross-sectional view of the torque limiting mechanism with buffering function of the present invention; Figure 3 This is a diagram of the ring spring state in the normal torque transmission mode of the torque limiting mechanism with buffer function of the present invention; Figure 4 This is a diagram of the ring spring state in the braking buffer mode of the torque limiting mechanism with buffer function on the right input shaft of the present invention when the torque exceeds the normal torque. Figure 5 This is a diagram of the ring spring state in the braking buffer mode of the torque limiting mechanism with buffer function on the left input shaft of the present invention when the torque exceeds the normal torque. Among them, 101 is the input shaft, 102 is the left housing, 103 is the right housing, 104 is the housing nut, 105 is the housing screw, 201 is the deep groove ball bearing, 202 is the spring T-sleeve, 203 is the stationary plate sleeve, 204 is the locating pin, 205 is the left support sleeve, 206 is the half ring, 207 is the angular contact bearing, 208 is the screw, 209 is the right support sleeve, 210 is the ring spring assembly, 211 is the inner ball track disc, 212 is the steel ball, 213 is the outer ball track disc, 214 is the moving friction plate, 215 is the stationary friction plate, 216 is the support ring, 217 is the long screw, 218 is the disc spring, 219 is the disc spring support sleeve and 220 is the slotted screw. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0020] In the description of this invention, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing and simplifying the invention, and should not be construed as limiting the invention. Furthermore, the use of ordinal numbers (e.g., "first and second," etc.) is for distinguishing objects and is not limited to this order, and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly, encompassing both direct connection and indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0022] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0024] To address the issue of excessive product weight due to impact loads generated during braking by traditional torque limiting mechanisms, this application provides a torque limiting mechanism with a buffer function. The mechanism includes two input shafts (left and right), an energy-absorbing component, two torque limiting assemblies (left and right), and a disc spring support sleeve. The disc spring support sleeve supports the two torque limiting assemblies. The right end of the left input shaft and the left end of the right input shaft are respectively housed within the housing via the two torque limiting assemblies. The energy-absorbing component is mounted on the disc spring support sleeve and positioned between the two torque limiting assemblies. By absorbing the braking impact load, the impact load during braking is reduced, thereby lowering the load acting on the front mechanical structure of the torque limiting mechanism and effectively reducing product weight. In one possible embodiment, the energy-absorbing component is a ring spring assembly.

[0025] The two torque limiting components can be the same or different. In one possible embodiment, the two torque limiting components are the same and each includes: stationary sleeve 203, inner ball track 211, steel ball 212, outer ball track 213, moving friction plate 214, stationary friction plate 215, and disc spring assembly 218. The inner ball track 211, steel ball 212 and outer ball track 213 are pressed together by the axial disc spring assembly 218, disc spring support sleeve 219 and slotted screw 220. The moving friction plate 214 and outer ball track 213 are connected by a spline, and the stationary friction plate 215 and stationary sleeve 203 are connected by a spline.

[0026] In one possible embodiment, the two torque limiting components are different. The left torque limiting component includes: a stationary sleeve 203, an inner ball track disc 211, a steel ball 212, an outer ball track disc 213, a dynamic friction plate 214, and a stationary friction plate 215. The inner ball track disc 211, the steel ball 212, and the outer ball track disc 213 are pressed together by a disc spring support sleeve 219 and a slotted screw 220. The dynamic friction plate 214 and the outer ball track disc 213 are connected by a spline, and the stationary friction plate 215 and the stationary sleeve 203 are connected by a spline. The right-side torque limiting assembly includes: a stationary sleeve 203, an inner raceway disc 211, a steel ball 212, an outer raceway disc 213, a moving friction plate 214, a stationary friction plate 215, and a disc spring assembly 218. The inner raceway disc 211, the steel ball 212, and the outer raceway disc 213 are pressed together by the axial disc spring assembly 218, the disc spring support sleeve 219, and the slotted screw 220. The moving friction plate 214 and the outer raceway disc 213 are connected by a spline, and the stationary friction plate 215 and the stationary sleeve 203 are connected by a spline.

[0027] In one possible embodiment, the input shaft 101 is supported between itself and the housing by two deep groove ball bearings 201.

[0028] In one possible embodiment, the two ends of the ball socket formed by the inner ball socket 211 and the outer ball socket 213 are symmetrical, and the angle and position of the ball socket ensure that the steel ball cannot climb out of the bottom of the ball socket before the over-torque is transmitted.

[0029] In one possible embodiment, the torque limiting assembly includes, but is not limited to, three uniformly distributed steel balls 212.

[0030] In one possible embodiment, the buffer function of the energy-absorbing component is not triggered when the torque limiting device is transmitting torque normally.

[0031] In one possible embodiment, when the torque transmitted by the right torque limiting device exceeds the normal torque, the energy-absorbing component is triggered by the right torque limiting component to buffer the torque; when the torque transmitted by the left torque limiting device exceeds the normal torque, the energy-absorbing component is triggered by the left torque limiting component to buffer the torque.

[0032] The design features a structure on each side with an inner track disc, steel ball, disc spring assembly, and outer track disc assembly that transmits power and motion, enabling braking to be triggered under normal torque and under excessive torque.

[0033] The design of the ball socket structure on both sides of the fairway disc is symmetrical at both ends. The angle and position of the ball socket are determined according to the design, but the steel ball cannot climb out of the bottom of the ball socket before transmitting the super torque.

[0034] The layout design of the ring spring assembly enables the buffer to be triggered under normal torque but triggered under excessive torque.

[0035] The torque limiting mechanism is not limited to the form of a steel ball track; it can also be other torque limiting mechanisms.

[0036] The preferred embodiments are described in detail below with reference to the accompanying drawings.

[0037] The present invention proposes a torque limiting mechanism with buffer function, the structure of which is as follows: Figure 1 and Figure 2 As shown. The fault indication mechanism consists of an input shaft 101, a left housing 102, a right housing 103, a housing nut 104, a housing screw 105, a deep groove ball bearing 201, a T-sleeve 202, a stationary sleeve 203, a locating pin 204, a left support sleeve 205, a half ring 206, an angular contact bearing 207, a screw 208, a right support sleeve 209, a ring spring assembly 210, an inner ball track disc 211, a steel ball 212, an outer ball track disc 213, a dynamic friction plate 214, a static friction plate 215, a support ring 216, a long screw 217, a disc spring assembly 218, a disc spring support sleeve 219, and a slotted screw 220.

[0038] The input shaft 101 is supported by two deep groove ball bearings 201, which are in turn supported by the left housing 102. The outer ball track disc 213, the input shaft 101, and the T-sleeve 202 are connected by splines. The stationary sleeve 203 is fixed to the left housing 102 by three circumferentially locating pins 204. An angular contact bearing 207 is mounted on the outer surface of the stationary sleeve 203 to support the left support sleeve 205. The left end face of the angular contact bearing 207 contacts the right end faces of the two semi-rings 206, limiting its axial displacement. The right end face of the angular contact bearing 207 contacts the left end face of the shoulder of the stationary sleeve 203, further limiting its axial displacement. The right support sleeve 209 and the left support sleeve 205 are secured together by eight circumferentially distributed screws 208. The left end face of the ring spring assembly 210 is supported by the left support sleeve 205 and the right end face of the inner ball track disk 211. The right end face of the ring spring assembly 210 is supported by the right support sleeve 209 and the left end face of the inner ball track disk 211. The two inner ball track disks 211 on both sides of the ring spring assembly 210, the three steel balls 212 on each side, and the two outer ball track disks 213 on both sides are pressed together by the disc spring assembly 218, the disc spring support sleeve 219, and the slotted screw 220 located in the axial direction. The moving friction plates 214 on both sides of the ring spring assembly 210 and the outer ball track disks 213 are connected by splines. The stationary friction plates 215 on both sides of the ring spring assembly 210 and the stationary plate sleeve 203 are connected by splines.

[0039] Normal torque transmission mode: When the torque limiting device transmits torque normally, the torque input from the right input shaft 101 is transmitted to the left input shaft 101 through the right T-sleeve 202, the right outer ball track disc 213, the three evenly distributed steel balls 212 on the right, the right inner ball track disc 211, the right support sleeve 209, the left support sleeve 205, the left inner ball track disc 211, the three evenly distributed steel balls 212 on the left, the left outer ball track disc 213, and the left T-sleeve 202. The preload of the disc spring assembly 218 is applied to the two inner ball track discs 211 on both sides of the ring spring assembly 210, the three steel balls 212 on each side, and the two outer ball track discs 213 on both sides through the disc spring support sleeve 219. At this time, the steel balls 212 are pressed to the bottom of the two inner ball track discs on both sides, the three steel balls 212 on each side, and the bottom of the two outer ball track discs on both sides. In normal torque transmission mode, the ring spring assembly 210 used for buffering does not operate and does not trigger the buffering function. The state of the ring spring assembly 210 is as follows: Figure 4 As shown.

[0040] Exceeding normal torque braking buffer mode: When the torque transmitted by the right-side torque limiting device exceeds the normal torque, the torque loaded on the right-side input shaft 101 passes through the right-side T-sleeve 202, the right-side outer ball track disc 213, and the three evenly distributed steel balls 212 on the right side. At this time, as the steel balls 212 move from the bottom to the top of the right-side outer ball track disc 213 and the right-side inner ball track disc 211, they push the right-side outer ball track disc 213 to the right, generating an axial force that acts on the end faces of the dynamic friction plate 214 and the static friction plate 215, generating a braking torque. Simultaneously, they push the right-side inner ball track disc 211 to the left, generating an axial force that compresses the ring spring assembly 210, triggering the buffer function. The state of the ring spring assembly 210 is as follows: Figure 5 As shown.

[0041] When the torque transmitted by the left torque limiting device exceeds the normal torque, the torque loaded on the left input shaft 101 passes through the left T-sleeve 202, the left outer ball track disc 213, and the three evenly distributed steel balls 212 on the left. At this time, as the steel balls 212 move from the bottom to the top of the left outer ball track disc 213 and the left inner ball track disc 211, they push the left outer ball track disc 213 to the left, generating an axial force that acts on the end faces of the dynamic friction plate 214 and the static friction plate 215, generating a braking torque. Simultaneously, they push the left inner ball track disc 211 to the right, generating an axial force that compresses the ring spring assembly 210, triggering the buffer function. The state of the ring spring assembly 210 is as follows: Figure 5 As shown.

[0042] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A torque limiting mechanism with a buffering function, characterized in that, include: The device includes two input shafts (left and right), an energy-absorbing component, two torque limiting components (left and right), and a disc spring support sleeve. The disc spring support sleeve supports the two torque limiting components. The right end of the left input shaft and the left end of the right input shaft are respectively housed within the housing via the two torque limiting components. The energy-absorbing component is mounted on the disc spring support sleeve and located between the two torque limiting components.

2. The torque limiting mechanism according to claim 1, characterized in that, The energy-absorbing component is a ring spring assembly.

3. The torque limiting mechanism according to claim 1, characterized in that, The two torque limiting components are identical and each includes: a stationary sleeve, an inner raceway disc, a steel ball, an outer raceway disc dynamic friction plate, a stationary friction plate, and a disc spring assembly. The inner raceway disc, the steel ball, and the outer raceway disc are pressed together by an axial disc spring assembly, a disc spring support sleeve, and slotted screws. The dynamic friction plate and the outer raceway disc are connected by a spline, and the stationary friction plate and the stationary sleeve are connected by a spline.

4. The torque limiting mechanism according to claim 1, characterized in that, The left-side torque limiting assembly includes: a stationary sleeve, an inner ball track disc, a steel ball, an outer ball track disc, a dynamic friction plate, and a stationary friction plate. The inner ball track disc, the steel ball, and the outer ball track disc are pressed together by a disc spring support sleeve and slotted screws. The dynamic friction plate and the outer ball track disc are connected by a spline, and the stationary friction plate and the stationary sleeve are connected by a spline. The right-side torque limiting assembly includes: a stationary sleeve, an inner raceway disc, a steel ball, an outer raceway disc dynamic friction plate, a stationary friction plate, and a disc spring assembly. The inner raceway disc, the steel ball, and the outer raceway disc are pressed together by an axial disc spring assembly, a disc spring support sleeve, and slotted screws. The dynamic friction plate and the outer raceway disc are connected by a spline, and the stationary friction plate and the stationary sleeve are connected by a spline.

5. The torque limiting mechanism according to claim 1, characterized in that, The input shaft is supported by two deep groove ball bearings between itself and the housing.

6. The torque limiting mechanism according to claim 1, characterized in that, The inner and outer lane discs form a symmetrical ball hole at both ends, and the angle and position of the ball hole ensure that the steel ball cannot climb out of the bottom of the ball hole before the over-torque is transmitted.

7. The torque limiting mechanism according to claim 1, characterized in that, The torque limiting assembly includes three evenly distributed steel balls.

8. The torque limiting mechanism according to claim 1, characterized in that, When the torque limiting device transmits torque normally, the buffer function of the energy-absorbing component is not triggered.

9. The torque limiting mechanism according to claim 1, characterized in that, When the torque transmitted by the right-side torque limiting device exceeds the normal torque, the energy-absorbing component is triggered by the right-side torque limiting component to buffer the torque.

10. The torque limiting mechanism according to claim 1, characterized in that, When the torque transmitted by the left torque limiting device exceeds the normal torque, the energy-absorbing component is triggered by the left torque limiting component to buffer the torque.

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