Vibration reduction bearing based on belleville spring
By evenly arranging the disc spring group in the circumference in the bearing, using its nonlinear characteristics and stacking method, the problem of insufficient vibration damping capacity in high-demand scenarios is solved, and higher load-bearing capacity and low-frequency vibration damping are achieved Effect.
Patent Information
- Application Number
- CN202323572494.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2033-12-27
AI Technical Summary
In some high-demand use scenarios, especially joint rehabilitation auxiliary exoskeletons, high-precision surgical robots and high-voltage line patrol inspection robots, they cannot meet higher load-bearing capacity, working conditions adaptability, low-frequency and even ultra-low frequency. Vibration damping/vibration isolation capability.
A vibration-absorbing bearing based on disc springs is designed. By uniformly arranging at least three disc spring groups in the circumference of the outer or inner ring of the bearing, the nonlinear characteristics of the disc springs and different stacking methods are used to achieve a larger The load-bearing capacity and low stiffness can effectively reduce vibration.
The frequency reduction and vibration impact reduction in the system are achieved, providing higher load-bearing capacity and low-frequency vibration damping effect, avoiding direct contact between the bearing and the mechanical structure, and extending service life.
Smart Images
Figure CN222229180U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearings, and more specifically to a vibration-damping bearing based on a disc spring. Background Art
[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy.
[0003] Usually, after the bearing is connected to the shaft, the rotation of the shaft drives the inner ring / outer ring of the bearing to rotate, and then through components such as balls between the inner ring and the outer ring, the inner ring rotates while the outer ring does not rotate, or the shaft and the inner ring remain stationary while the outer ring rotates. This avoids direct contact between the shaft and the mechanical structure, transfers the wear between the shaft and the machine to components such as balls, and extends the service life of the shaft.
[0004] However, in some use scenarios, such as joint rehabilitation auxiliary exoskeletons, high-precision surgical robots, mobile precision machining and high-voltage line inspection and measurement robots, higher requirements are required for load-bearing capacity, working condition adaptability, and low-frequency or even ultra-low-frequency vibration reduction / isolation capabilities. Most types of bearings currently cannot meet the requirements, especially the vibration reduction / isolation capabilities, which are not available in ordinary bearings. Utility Model Content
[0005] This specification provides a disc spring-based vibration-damping bearing, which effectively buffers and reduces vibrations of the bearing movement through the disc spring.
[0006] The embodiments of the present specification disclose a disc spring-based vibration-damping bearing, comprising a bearing outer ring and a bearing inner ring, and also comprising: at least three disc spring groups, evenly arranged circumferentially on the outer side surface of the bearing outer ring away from the bearing inner ring, or evenly arranged circumferentially on the inner side surface of the bearing inner ring away from the bearing outer ring.
[0007] In some embodiments, the disc spring group has 4, 6 or 8 disc springs.
[0008] In some embodiments, each of the disc spring groups includes a plurality of disc spring units, and the plurality of disc spring units in each of the disc spring groups are stacked in the same direction, stacked in opposite directions, or any combination of the same direction and stacked in opposite directions.
[0009] In some embodiments, when the disc spring assembly is disposed on the outer side of the bearing outer ring, the disc spring assembly is connected to the bearing outer ring via a connecting member.
[0010] In some embodiments, when the disc spring group is arranged on the inner side surface of the bearing inner ring, one end of the disc spring group is connected to the bearing inner ring through a connecting piece, and the other end of the disc spring group is in contact with the shaft passing through the bearing inner ring; and / or, one end of the disc spring group is in contact with the bearing inner ring, and the other end of the disc spring group is used to be connected to the shaft passing through the bearing inner ring through a connecting piece.
[0011] In some embodiments, the connecting member is a gasket or a connecting rod.
[0012] The embodiments of this specification can at least achieve the following beneficial effects:
[0013] At least three disc spring groups are evenly arranged along the circumferential direction on the outer side surface of the bearing outer ring or the inner side surface of the bearing inner ring, and the nonlinear characteristics of the disc springs are utilized to obtain a larger load-bearing capacity and low stiffness in the vertical direction, so that the vibration-damping bearing can effectively reduce the frequency of the system in which it is located, reduce the impact of vibration on the outside of the system, or reduce the impact of vibration outside the system on the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic structural diagram of disc springs involved in some embodiments of the present invention, which are arranged on the outer side of the outer ring of a bearing.
[0015] Figure 2 It is a schematic structural diagram of a disc spring assembly involved in some embodiments of the utility model, which is arranged on the inner side surface of the inner ring of a bearing.
[0016] Figure 3 This is a schematic structural diagram of disc spring units involved in some embodiments of the present invention in a same-direction stacking manner.
[0017] Figure 4 This is a schematic structural diagram of disc spring units involved in some embodiments of the present invention in a reverse stacking manner.
[0018] Figure 5 This is a schematic structural diagram of disc spring units involved in some embodiments of the present invention using any combination of same-direction stacking and reverse stacking.
[0019] Figure 6 This is a structural schematic diagram of a disc spring assembly involved in some embodiments of the present invention being arranged on the outer side of a bearing outer ring, in which the disc spring assembly is connected to the bearing outer ring via a connecting piece.
[0020] Figure 7 This is a schematic structural diagram of the disc spring assembly involved in some embodiments of the utility model when it is arranged between the inner ring of the bearing and the shaft through a connecting piece.
[0021] Reference numerals:
[0022] 100, vibration damping bearing; 110, disc spring assembly; 111, disc spring unit;
[0023] 120. Bearing outer ring; 130. Bearing inner ring; 140. Shaft; 150. Connector. DETAILED DESCRIPTION
[0024] The technical solution of the present utility model is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following.
[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.
[0026] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] In the present utility model, unless otherwise clearly specified and limited, if a first feature exists above or below a second feature, it may include that the first and second features are in direct contact, or it may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is above, above and above the second feature, including that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. If a first feature exists below, below and below the second feature, it includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0029] The present invention is further described below in conjunction with the embodiments, which are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in the field without creative work are all within the protection scope of the present invention.
[0030] Please refer to the attached drawings, which show the structure of the embodiment selected for the present invention, which is for illustration only, and the patent application is not limited to this structure.
[0031] Figure 1 and Figure 2 It is a schematic structural diagram of a disc spring-based vibration-damping bearing 100 according to some embodiments of this specification.
[0032] The vibration-damping bearing 100 may include a disc spring set 110 , a bearing outer ring 120 , and a bearing inner ring 130 .
[0033] In some embodiments, the disc spring assembly 110 may be evenly arranged on the outer side of the bearing outer ring 120 along the circumferential direction. Figure 1 shown.
[0034] In some embodiments, the disc spring assembly 110 may be evenly arranged on the inner side of the bearing inner ring 130 along the circumferential direction. Figure 2 shown.
[0035] In some embodiments, there may be at least three disc spring groups 110. Specifically, there may be 3, 4, 5, 6, 7, 8, or even more disc spring groups 110, and the specific number is selected according to actual conditions.
[0036] The purpose of evenly arranging the disc spring groups 110 along the circumferential direction is to enable the vibration-damping bearing to evenly transmit force. For example, the disc spring groups 110 are evenly arranged along the circumferential direction on the outer side of the bearing outer ring 120, so as to achieve buffering and vibration reduction between the system where the vibration-damping bearing 100 is located and the vibration-damping bearing 100. For another example, the disc spring groups 110 are evenly arranged along the circumferential direction on the inner side of the bearing inner ring 130, so as to achieve buffering and vibration reduction between the vibration-damping bearing 100 and the shaft passing through the bearing inner ring 130.
[0037] In some embodiments, each disc spring group 110 may include a plurality of disc spring units 111 , and the plurality of disc spring units 111 in each disc spring group 110 may be stacked in the same direction, stacked in opposite directions, or any combination of the same direction and opposite directions.
[0038] like Figure 3 As shown, stacking in the same direction means that a plurality of disc spring units 111 are stacked in sequence in the same direction. The disc spring group 110 stacked in the same direction can quickly improve the bearing capacity of the system while keeping the moving space in the vertical direction unchanged.
[0039] like Figure 4 As shown, reverse stacking refers to stacking two adjacent disc spring units 111 in opposite directions. The disc spring group 110 using reverse stacking can obtain lower system stiffness by using a very small displacement increment while ensuring that the bearing mass remains unchanged.
[0040] like Figure 5 As shown, any combination of same-direction stacking and reverse stacking means that some disc spring units 111 are stacked in sequence in the same direction, and another part of adjacent disc spring units 111 are stacked in opposite directions.
[0041] The disc spring unit 111 can obtain different load and stiffness ranges through different stacking forms (including same-direction stacking, reverse stacking, and combined stacking) and stacking quantities, thereby meeting different engineering requirements.
[0042] The disc spring is used as the bearing structure in this specification, which has at least the following beneficial effects:
[0043] (1) The disc spring has a compact structure and strong load-bearing capacity. It can support a large mass with only a small deformation, which helps to reduce the overall size and vertical displacement of the entire vibration damping bearing.
[0044] (2) The load-bearing capacity can be customized. By changing the number and form of the disc springs, the mass and structural stiffness of the system using the vibration damping bearing at the equilibrium position can be easily changed.
[0045] (3) The disc spring itself has large structural damping and friction damping, and does not require additional dampers.
[0046] (4) By properly selecting the height-to-thickness ratio of the disc spring, a smaller dynamic stiffness can be obtained while ensuring sufficient load-bearing capacity.
[0047] In some embodiments, the disc spring assembly 110 may be disposed on the outer side of the bearing outer ring 120, and the disc spring assembly 110 is connected to the bearing outer ring 120 via a connecting member 150, such as Figure 6 shown.
[0048] In some embodiments, the disc spring assembly 110 may be disposed between the bearing inner ring 130 and the shaft 140 passing through the bearing inner ring 130, and the disc spring assembly 110 may be connected to the bearing inner ring 130 via a connector 150, such as Figure 7 shown.
[0049] In some embodiments, the disc spring assembly 110 may be disposed between the bearing inner ring 130 and a shaft 140 passing through the bearing inner ring 130, and the disc spring assembly 110 is connected to the shaft 140 via a connecting member 150, such as Figure 7 shown.
[0050] In some embodiments, the connecting member 150 may be a spacer or a connecting rod.
[0051] Some of the above embodiments use the connector 150, which has at least the following beneficial effects: by adding or subtracting the number of connectors 150, the distance between the disc spring group 110 and the bearing outer ring 120, the distance between the disc spring group 110 and the shaft 140, and the distance between the disc spring group 110 and the bearing inner ring 130 can be changed to meet different load-bearing capacity requirements, so that pre-adjustment can be performed under different load-bearing conditions. Pre-adjustment means that before the vibration-damping bearing 100 is used, the reference amount of the above distance is first determined according to the load-bearing capacity requirements (the corresponding relationship between the reference amount and the load-bearing capacity requirements can be determined through repeated tests in the early stage), and then the selected number of connectors 150 are pre-installed at the corresponding positions based on the reference amount.
[0052] The vibration-damping bearing of this specification can be applied to the elastic support system in the aircraft engine, and the nonlinear stiffness and large damping characteristics of the disc spring can be used to replace the squirrel cage elastic support and squeeze film damper currently used in the aircraft engine. The vibration-damping bearing of this specification can also provide vibration reduction / vibration isolation capabilities for high-precision instruments, such as joint rehabilitation auxiliary exoskeletons, high-precision surgical robots, movable precision machining and high-voltage line inspection and measurement robots, etc.
[0053] The above embodiments are used to illustrate the present invention, not to limit the present invention, so changes in the exemplified values or replacement of equivalent components should still fall within the scope of the present invention.
[0054] From the above detailed description, it can be understood by those skilled in the art that the present invention can indeed achieve the aforementioned objectives and is in compliance with the provisions of the Patent Law.
[0055] Although the preferred embodiments of the utility model have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model. The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.
Claims
1. A disc spring-based vibration-damping bearing, comprising a bearing outer ring and a bearing inner ring, characterized in that: Also includes: At least three disc spring groups are evenly arranged on the outer side surface of the bearing outer ring along the circumferential direction, or evenly arranged on the inner side surface of the bearing inner ring along the circumferential direction.
2. A disc spring-based vibration damping bearing according to claim 1, characterized in that: The disc spring group has 4, 6 or 8 disc springs.
3. A disc spring-based vibration damping bearing according to claim 1, characterized in that: Each disc spring group includes a plurality of disc spring units, and the plurality of disc spring units in each disc spring group are stacked in the same direction, stacked in opposite directions, or any combination of the same direction and stacked in opposite directions.
4. A disc spring-based vibration damping bearing according to claim 1, characterized in that: When the disc spring assembly is arranged on the outer side surface of the bearing outer ring, the disc spring assembly is connected to the bearing outer ring through a connecting piece.
5. A disc spring-based vibration damping bearing according to claim 1, characterized in that: When the disc spring group is arranged on the inner side surface of the bearing inner ring, one end of the disc spring group is connected to the bearing inner ring through a connecting piece, and the other end of the disc spring group is in contact with the shaft passing through the bearing inner ring; and / or, one end of the disc spring group is in contact with the bearing inner ring, and the other end of the disc spring group is used to be connected to the shaft passing through the bearing inner ring through a connecting piece.
6. A disc spring-based vibration damping bearing as claimed in claim 4 or 5, characterized in that: The connecting member is a gasket or a connecting rod.