Cableway driving friction connection mechanism and device based on elastic deformation compensation

Abstract

According to the cableway driving friction connection mechanism and device based on elastic deformation compensation, the connection mode of a driving device is changed into static connection from dynamic connection, gaps are eliminated, the transmission stability is improved, the plane friction pair is arranged at the joint of the driving shaft and the driving wheel body to transmit torque, and therefore the stability of the cableway driving friction connection mechanism is improved. The plane friction pair is connected with the driving wheel body through a prestress bolt, the pretightening force enables the contact surface of the friction pair to generate constant static friction torque, and the pressure intensity distribution uniformity of the contact surface of the plane friction pair is larger than or equal to 90%.

Description

A cableway drive friction connection mechanism and device based on elastic deformation compensation Technical Field

[0001] This utility model relates to the technical field of passenger ropeway drive devices, and in particular to a ropeway drive friction connection mechanism and device based on elastic deformation compensation. Background Technology

[0002] Existing passenger ropeway drive systems generally use standard flat keys, tangential keys, or splines for connection. Due to machining tolerances, these dynamic connection structures often result in clearances, which can easily lead to loosening of connectors, abnormal noises, and decreased transmission efficiency during forward and reverse operation. Specific defects include:

[0003] The gaps cause instability in the drive train, requiring frequent maintenance and making fault location difficult.

[0004] Long-term operation has caused structural fatigue, posing a safety hazard;

[0005] High maintenance costs and low replacement efficiency affect the economic efficiency of cableway operation. Summary of the Invention

[0006] The purpose of this utility model is to provide a cableway drive friction connection mechanism and device based on elastic deformation compensation, which changes the connection method of the drive device from dynamic connection to static connection, eliminates gaps and improves transmission stability.

[0007] The embodiments of this utility model are implemented as follows:

[0008] A cableway drive friction connection mechanism based on elastic deformation compensation is provided, in which a planar friction pair is set at the connection between the drive shaft and the drive wheel to transmit torque. The planar friction pair is connected to the drive wheel by prestressed bolts. The preload of the bolts causes the contact surface of the friction pair to generate a constant static friction torque. The pressure distribution uniformity of the contact surface of the planar friction pair is ≥90%.

[0009] In a preferred embodiment of the present invention, the planar friction pair includes an outer friction plate and an inner friction plate. The outer friction plate is disposed on the upper and lower surfaces of the drive wheel body, and the inner friction plate is assembled on the surfaces of the upper and lower cavities inside the drive wheel body.

[0010] In a preferred embodiment of this utility model, the outer friction plate and the inner friction plate are made of tungsten carbide-based composite material, and a laser-clad wear-resistant layer with a thickness of 0.5-1.2 mm is provided on the surface.

[0011] In a preferred embodiment of this utility model, the outer friction plate and the inner friction plate are annular, and bolt holes are provided on the annular body. Bolt groups are assembled in the bolt holes, and the bolt groups are arranged in an alternating annular layout.

[0012] In a preferred embodiment of the present invention, the drive wheel body is provided with an assembly groove for assembling an outer friction plate and an inner friction plate.

[0013] In a preferred embodiment of this invention, the thickness of the outer friction plate is equal to the thickness of the inner friction plate.

[0014] In a preferred embodiment of this utility model, the surface hardness of the outer friction plate and the inner friction plate is ≥60HRC, and the core toughness is ≥40J.

[0015] In a preferred embodiment of this utility model, the prestressed bolt is a double-ended stud hydraulic tension preload bolt.

[0016] In a preferred embodiment of this utility model, the slope angle of the upper surface of the drive wheel is smaller than that of the lower surface. A horizontal baffle extends from the middle of the upper surface slope and is positioned directly above the upper end plane of the drive wheel. The horizontal baffle is connected to the upper end plane of the drive wheel by screws. The width of the upper end plane of the drive wheel is smaller than that of the lower end plane of the drive wheel. A transmission gear is mounted on the lower end plane of the drive wheel by screws. A washer with a stepped cross-section is also provided between the transmission gear and the lower end plane of the drive wheel.

[0017] A cableway drive device based on elastic deformation compensation includes any of the aforementioned cableway drive friction connection mechanisms, and a first wheel support and a second wheel support are also mounted on the drive shaft, the first wheel support and the second wheel support being located at the upper and lower parts of the drive wheel body, respectively.

[0018] The beneficial effects of this utility model embodiment are:

[0019] This invention incorporates a planar friction pair at the connection between the drive shaft and the drive wheel to transmit torque. The static connection of the friction pair replaces the key connection, eliminating gaps and preventing loosening and abnormal noise. Simultaneously, a prestressed bolt connection is used, with the bolt preload elastically compensating for tolerances, giving it self-compensation capabilities and extending its lifespan. The improved drive wheel, drive shaft, and planar friction pair adopt a modular design, reducing disassembly and assembly difficulty, facilitating maintenance, and minimizing downtime. The contact surface of the planar friction pair is a precision-machined large flat surface with a stable friction coefficient, ensuring constant static torque, enhancing the stability of the transmission chain, reducing the risk of shaft breakage, and thus improving safety. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is a schematic diagram of the cableway drive device according to an embodiment of the present invention;

[0022] Figure 2 is an enlarged structural schematic diagram of the cableway drive device at position A in an embodiment of the present invention;

[0023] Figure 3 is an enlarged structural schematic diagram of the cableway drive device at position B in an embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of the external friction plate structure according to an embodiment of the present invention;

[0025] icon:

[0026] Drive shaft 110; drive wheel body 120; assembly groove 121; upper surface inclined surface 122; lower surface inclined surface 123; horizontal baffle 124; upper end plane of drive wheel 125; lower end plane of drive wheel 126; transmission gear 127; washer 128; planar friction pair 130; outer friction plate 131; inner friction plate 132; bolt hole 133; first bolt hole group 1331; second bolt hole group 1332; third bolt hole group 1333; fourth bolt hole group 1334; prestressed bolt 140;

[0027] First wheel support 151; second wheel support 152. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] First Embodiment

[0035] Referring to Figures 1-4, this embodiment provides a cableway drive friction connection mechanism based on elastic deformation compensation. A planar friction pair 130 is set at the connection between the drive shaft 110 and the drive wheel 120 to transmit torque. The planar friction pair 130 replaces the traditional key connection, completely eliminating the fit clearance caused by machining tolerances, avoiding loosening and abnormal noise under forward and reverse operation conditions, and improving transmission stability by ≥40%. The planar friction pair 130 is connected to the drive wheel 120 by a prestressed bolt 140. Its preload causes the contact surface of the friction pair to generate a constant static friction torque, and the pressure distribution uniformity of the contact surface of the planar friction pair 130 is ≥90%.

[0036] To reduce the problems of dynamic connections, this embodiment utilizes the proportional relationship between the prestress of the high-strength prestressed bolt 140 and the tightening torque. At the same time, it utilizes the principle of friction pair transmission to solve the problem of non-compensation in the original connection. By utilizing the elastic deformation principle of the prestressed bolt 140, elastic deformation is effectively compensated, and under the condition of stable friction coefficient, its static friction torque remains unchanged.

[0037] The planar friction pair 130 includes an outer friction plate 131 and an inner friction plate 132. The outer friction plate 131 is disposed on the upper and lower surfaces of the drive wheel body 120, and the inner friction plate 132 is assembled on the upper and lower cavity surfaces inside the drive wheel body 120. The contact surfaces of the outer friction plate 131 and the inner friction plate 132 are precision-machined planes with stable friction coefficients, ensuring constant static torque.

[0038] In this embodiment, the uniform preload generated by the prestressed bolt 140 ensures a pressure distribution uniformity of ≥90%, thereby maintaining a constant static friction torque on the contact surface of the friction pair and achieving a transmission efficiency of over 98%. Compared to the 80%-85% of traditional key connections, the transmission efficiency is significantly improved.

[0039] Specifically, in this embodiment, the outer friction plate 131 and the inner friction plate 132 are made of tungsten carbide-based composite material, with a laser-clad wear-resistant layer on the surface, the thickness of which is 0.5-1.2 mm. The surface hardness of the outer friction plate 131 and the inner friction plate is ≥60 HRC, and the core toughness is ≥40 J. The outer friction plate 131 / inner friction plate 132 uses tungsten carbide-based composite material and a laser-clad wear-resistant layer. The thickness of the laser-clad wear-resistant layer is 0.5-1.2 mm, the surface hardness is ≥60 HRC, which improves the wear resistance of the friction plate, and the core toughness is ≥40 J, which improves the impact resistance of the friction plate. Under extreme working conditions, the wear amount is ≤0.05 mm / 10^6 cycles.

[0040] The outer friction plate 131 and the inner friction plate 132 are annular, with an inner diameter of 410 mm and an outer diameter of 940 mm. Bolt holes 133 are provided on the annular body, and bolt groups are assembled in bolt holes 133. The bolt groups are arranged in an interlaced annular layout to avoid stress concentration.

[0041] Specifically, this embodiment includes four sets of bolt holes 133 arranged in a circular array, from the inside out: a first bolt hole group 1331, a second bolt hole group 1332, a third bolt hole group 1333, and a fourth bolt hole group 1334. The spacing between the first bolt hole group 1331 and the second bolt hole group 1332 is the same as the spacing between the third bolt hole group 1333 and the fourth bolt hole group 1334. The spacing between the second bolt hole group 1332 and the third bolt hole group 1333 is greater than the spacing between the first bolt hole group 1331 and the second bolt hole group 1332. Furthermore, the first bolt hole group 1331 and the second bolt hole group 1332 are arranged in an alternating ring pattern, the second bolt hole group 1332 and the third bolt hole group 1333 are arranged in an alternating ring pattern, and the number of bolt holes in the fourth bolt hole group 1334 is twice that of the third bolt hole group 1333.

[0042] Correspondingly, the drive wheel body 120 is provided with an assembly groove 121 for assembling the outer friction plate 131 and the inner friction plate. The thickness of the outer friction plate 131 is equal to the thickness of the inner friction plate 132, which is 22mm, forming a "hard-tough" layered structure. The friction coefficient fluctuation is ≤0.02 under operating conditions of -40℃ to 80℃, which enhances environmental adaptability.

[0043] In this embodiment, the outer friction plate 131 and the inner friction plate 132 adopt a ring-shaped split design. They are quickly positioned by the assembly slot 121 of the drive wheel body 120, supporting individual replacement, reducing spare parts costs, and shortening the disassembly and assembly time to 2 hours. Compared with the traditional key connection which takes 6-8 hours, this greatly improves the disassembly and assembly efficiency.

[0044] Meanwhile, in this embodiment, the prestressed bolts 140 are precisely controlled in terms of preload, and the bolt holes 133 are arranged in radial groups to form a ring array. With the help of a symmetrical cross tightening process, the preload is applied in stages of 50%, 80%, and 100%, and the preload torque deviation is ≤ ±5%, thus avoiding local stress concentration.

[0045] Specifically, in this embodiment, the prestressed bolt 140 is a double-ended stud hydraulic tension preload bolt. The double-ended stud hydraulic tension preload bolt can also be used with a disc spring washer to achieve dynamic compensation for tolerances, thermal expansion and wear, thereby extending the service life of the transmission system.

[0046] The drive wheel body 120 is a double-groove drive wheel. The angle of its upper surface inclined surface 122 is smaller than that of its lower surface inclined surface 123. A horizontal baffle 124 extends from the middle of the upper surface inclined surface 122 and is located directly above the upper end plane of the drive wheel body 120. The horizontal baffle 124 is connected to the upper end plane of the drive wheel body 120 by screws and provides thread protection. The width of the upper end plane 125 of the drive wheel is smaller than the width of the lower end plane 126 of the drive wheel. The lower end plane 126 of the drive wheel is fitted with a transmission gear 127 by screws. A washer 128 with a stepped cross section is also provided between the transmission gear 127 and the lower end plane 126 of the drive wheel.

[0047] In this embodiment, the upper and lower end faces of the drive wheel 120 adopt an asymmetrical inclined surface design, with the angle of the upper surface inclined surface 122 being less than that of the lower surface. Combined with the stepped washer 128, it effectively disperses the dynamic tension impact of the wire rope, reducing the vibration amplitude by 70%.

[0048] Second Embodiment

[0049] Please refer to Figure 1. This embodiment provides a cableway drive device based on elastic deformation compensation. Using the cableway drive friction connection mechanism in the first embodiment, the drive shaft 110 is also equipped with a first wheel support 151 and a second wheel support 152. The first wheel support 151 and the second wheel support 152 are located at the upper and lower parts of the drive wheel 120, respectively, and there is a gap between them.

[0050] This specification describes examples of embodiments of the present invention, but does not imply that these embodiments illustrate and describe all possible forms of the present invention. It should be understood that the embodiments in the specification can be implemented in various alternative forms. The drawings are not necessarily drawn to scale; some features may be enlarged or reduced to show details of specific components. The specific structural and functional details disclosed should not be construed as limiting, but merely as a representative basis for teaching those skilled in the art to implement the present invention in various forms. Those skilled in the art will understand that multiple features illustrated and described with reference to any of the drawings can be combined with features illustrated in one or more other drawings to form embodiments not explicitly illustrated or described. The illustrated combinations of features provide representative embodiments for typical applications. However, various combinations and variations of features consistent with the teachings of the present invention may be used as needed for specific applications or implementations.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cableway drive friction connection mechanism based on elastic deformation compensation, characterized in that, A planar friction pair is provided at the connection between the drive shaft and the drive wheel to transmit torque. The planar friction pair is connected to the drive wheel by a prestressed bolt. The preload of the bolt causes the contact surface of the friction pair to generate a constant static friction torque. The pressure distribution uniformity of the contact surface of the planar friction pair is ≥90%.

2. The cableway drive friction connection mechanism based on elastic deformation compensation according to claim 1, characterized in that, The planar friction pair includes an outer friction plate and an inner friction plate. The outer friction plate is disposed on the upper and lower surfaces of the drive wheel body, and the inner friction plate is assembled on the surfaces of the upper and lower cavities inside the drive wheel body.

3. The cableway drive friction connection mechanism based on elastic deformation compensation according to claim 2, characterized in that, The outer friction plate and inner friction plate are made of tungsten carbide-based composite material, with a laser-clad wear-resistant layer on the surface, with a thickness of 0.5-1.2 mm.

4. The cableway drive friction connection mechanism based on elastic deformation compensation according to claim 2, characterized in that, The outer friction plate and the inner friction plate are annular, and bolt holes are provided on the annular body. Bolt groups are assembled in the bolt holes, and the bolt groups are arranged in an alternating annular layout.

5. The cableway drive friction connection mechanism based on elastic deformation compensation according to claim 2, characterized in that, The drive wheel is provided with an assembly groove for assembling the outer friction plate and the inner friction plate.

6. The cableway drive friction connection mechanism based on elastic deformation compensation according to claim 2, characterized in that, The thickness of the outer friction plate is equal to the thickness of the inner friction plate.

7. The cableway drive friction connection mechanism based on elastic deformation compensation according to claim 2, characterized in that, The surface hardness of the outer friction plate and the inner friction plate is ≥60HRC, and the core toughness is ≥40J.

8. The cableway drive friction connection mechanism based on elastic deformation compensation according to claim 2, characterized in that, The prestressed bolt is a double-ended stud hydraulic tension preload bolt.

9. The cableway drive friction connection mechanism based on elastic deformation compensation according to claim 1, characterized in that, The upper surface of the drive wheel has a smaller slope angle than the lower surface. A horizontal baffle extends from the middle of the upper surface slope and is positioned directly above the upper end plane of the drive wheel. The horizontal baffle is connected to the upper end plane of the drive wheel by screws. The width of the upper end plane of the drive wheel is smaller than the width of the lower end plane of the drive wheel. A transmission gear is mounted on the lower end plane of the drive wheel by screws. A washer with a stepped cross-section is also provided between the transmission gear and the lower end plane of the drive wheel.

10. A cableway drive device based on elastic deformation compensation, comprising the cableway drive friction connection mechanism as described in any one of claims 1-9, characterized in that, The drive shaft is also equipped with a first wheel support and a second wheel support, which are located at the upper and lower parts of the drive wheel, respectively.

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