Vibration reduction hanging bracket structure of transmission shaft

Abstract

The utility model discloses a vibration reduction hanging bracket structure of a transmission shaft, which comprises a vibration reduction hanging bracket, a sliding bearing, a vibration reduction pad and a check ring, the sliding bearing is arranged in the vibration reduction hanging bracket, and the sliding bearing is connected with the transmission shaft; a damping pad is arranged on the outer ring of the sliding bearing, a check ring is further arranged on the damping hanging bracket, and the check ring is fixedly connected with the damping hanging bracket through a check ring bolt. The vibration reduction hanging bracket has the advantages that the whole vibration reduction hanging bracket structure body is made of titanium alloy, and the weight is low on the premise that the strength is guaranteed; meanwhile, through the structure of a sliding bearing and a shock pad in the middle of the transmission shaft, the problems that the control of the unmanned aerial vehicle is affected due to serious shaking of the transmission shaft, and even a rack is impacted can be avoided, and all parts of the vibration reduction hanging bracket structure have high applicability and maintainability.

Description

Technical Field

[0001] The present invention relates to the technical field of the drive system of unmanned aerial vehicles, and particularly relates to a vibration damping hanger structure for a drive shaft. Background Technique

[0002] In recent years, with the development of the domestic unmanned aerial vehicle field, the technical levels of various unmanned aerial vehicle manufacturers have also developed rapidly. There are more requirements for the overall performance indicators and the overall weight of the whole machine, and the requirements for the control performance of unmanned aerial vehicles are also getting higher and higher.

[0003] The drive shaft is an important component for transmitting power in the drive train. Its function is to transmit the power of the engine to the end, so that the end generates a driving force. In the current existing technology, when an unmanned aerial vehicle is flying, the drive shaft will generate vibrations, which will affect the balance of the unmanned aerial vehicle and even cause the flight trajectory of the unmanned aerial vehicle to deviate.

[0004] In the existing field of unmanned aerial vehicles, with the increase of the load requirement, the long-axis drive shaft of unmanned aerial vehicles has gradually been adopted by each main engine factory. In order to reduce the resistance during the high-speed rotation of the drive shaft, a structure with roller bearings and vibration damping pads inside the bracket is usually adopted, but this structure is difficult to assemble and adjust and inconvenient to maintain. Utility Model Content

[0005] The purpose of the present utility model is to overcome the deficiencies of the existing technology and provide a vibration damping hanger structure for a drive shaft, so as to improve the transmission efficiency, reduce the manufacturing cost, reduce the overall weight of the whole machine, and improve the overall performance indicators of the whole machine.

[0006] To achieve the above purpose, the present utility model provides the following technical solutions: a vibration damping hanger structure for a drive shaft, including a frame cross beam and a drive shaft, and the technical key points are:

[0007] A vibration damping hanger is arranged on one side of the frame cross beam, a sliding bearing is arranged inside the vibration damping hanger, and the sliding bearing is connected to the drive shaft;

[0008] A vibration damping pad is arranged on the outer ring of the sliding bearing, a retaining ring is also arranged on the vibration damping hanger, and the retaining ring is fixedly connected to the hoisting through a retaining ring bolt;

[0009] Two bolt mounting holes are also arranged on the vibration damping hanger, and the vibration damping hanger is connected to the aircraft frame cross beam through bolts.

[0010] Preferably, the sliding bearing and the vibration damping pad are of an integral structure, and are connected to the drive shaft by being press-fitted into the vibration damping hanger.

[0011] Preferably, the sliding bearing, the vibration damping pad and the vibration damping hanger are connected by an interference fit method.

[0012] Preferably, the retaining rings are fixed at both ends of the vibration damping hanger and are locked by retaining ring bolts.

[0013] Preferably, the overall material of the vibration damping hanger structure is titanium alloy.

[0014] The advantages and beneficial effects of the present utility model are as follows: The present utility model provides a vibration damping hanger structure for a transmission shaft. By providing a vibration damping hanger, a sliding bearing, a vibration damping pad, and a retaining ring, the effect of a lightweight design for the transmission shaft hanger in the middle of the transmission shaft is achieved. This not only reduces the weight of the transmission shaft hanger but also avoids the problem that serious vibration of the transmission shaft will affect the control of the unmanned aerial vehicle and even cause the transmission shaft to impact the frame. The installation method of the vibration damping hanger structure protected by this application is simple and does not require additional installation of other transition brackets, that is, it can realize the layout of the power transmission system with a lateral span of more than 2000 mm for the installation point of the intermediate support bracket of the transmission shaft. At the same time, the components constituting the vibration damping hanger structure adopt an assembled structure, which can be repaired targeted, reducing costs. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall planar structure of the vibration damping hanger structure;

[0016] Figure 2 is a schematic diagram of the three-dimensional structure of the vibration damping hanger structure;

[0017] In the figure: 1. Vibration damping hanger, 2. Vibration damping pad, 3. Retaining ring, 4. Sliding bearing, 5. Retaining ring bolt. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figure 1 , the present utility model provides a technical solution: a vibration damping hanger structure for a transmission shaft. The overall material of the vibration damping hanger structure is titanium alloy, and such titanium alloy material has a relatively low weight while ensuring strength.

[0020] In this application, the vibration damping suspension mechanism of the transmission shaft mainly includes a vibration damping hanger 1, a vibration damping pad 2, a retaining ring 3, and a sliding bearing 4. A vibration damping hanger 1 is provided on one side of the frame crossbeam. A sliding bearing 4 is provided inside the vibration damping hanger 1, and the sliding bearing 4 is connected to the transmission shaft.

[0021] A vibration damping pad 2 is provided on the outer ring of the sliding bearing 4. The sliding bearing 4 and the vibration damping pad 2 are of an integral structure. After the sliding bearing 4 and the vibration damping pad 2 are integrally vulcanized, they are press-fitted into the vibration damping hanger 1 and connected to the transmission shaft. The sliding bearing 4 and the vibration damping pad 2 are connected to the transmission shaft by being press-fitted into the vibration damping hanger 1. The vibration damping pad 2 vulcanized on the outer ring of the sliding bearing 4 mainly serves to support the transmission shaft and absorb the rotational vibration of the transmission shaft. An interference fit is adopted between the sliding bearing 4, the vibration damping pad 2 and the hanger 1 to achieve the connection.

[0022] In this application, the material of the vibration damping pad 2 is rubber. The rubber stiffness and hardness value of the sliding bearing 4 can be adjusted in a timely manner according to the actual working effect of the transmission shaft to ensure the best vibration damping effect.

[0023] In this application, a retaining ring 3 is further provided on the vibration damping hanger 1. The retaining ring 3 is fixedly connected to the hanger 1 through a retaining ring bolt 5. The retaining ring 3 is fixed at the upper and lower ends of the vibration damping hanger 1 and is locked through the retaining ring bolt 5. Each side of the retaining ring 3 is fixed by four retaining ring bolts 5. After the sliding bearing 4 and the vibration damping pad 2 are pressed into the vibration damping hanger 1, two retaining rings 3 are fixed at both ends of the vibration damping hanger 1 and locked with the retaining ring bolts 5.

[0024] Two bolt mounting holes are further provided on the vibration damping hanger 1. The bolt mounting holes connect the vibration damping hanger 1 to the aircraft frame cross beam through bolts.

[0025] In this application, a vibration damping pad 2 made of rubber is provided inside the vibration damping hanger mechanism of the transmission shaft, which can effectively prevent the vibration of the transmission shaft from affecting the overall NVH of the machine. At the same time, a maintenance-free sliding bearing 4 is provided inside the vibration damping hanger mechanism. An oil storage groove is provided inside the sliding bearing 4, and a maintenance-free structure is adopted. The vibration damping pad 2 and the sliding bearing 4 are assembled and installed into the vibration damping hanger 1, and the vibration damping pad can be replaced according to the overall NVH performance requirements, improving the applicability and maintainability.

[0026] The vibration damping hanger structure of the transmission shaft protected by this application is provided with a vibration damping pad made of rubber, which can effectively prevent the vibration of the transmission shaft from affecting the overall NVH of the machine. At the same time, a sliding bearing with a maintenance-free structure is adopted, and an oil storage groove is provided inside the sliding bearing to reduce the intensity of bearing maintenance. The vibration damping pad and the sliding bearing are assembled and installed into the vibration damping hanger, and the vibration damping pad can be replaced according to the overall NVH performance requirements. During use, after the sliding bearing and the vibration damping pad are pressed into the vibration damping hanger, a retaining ring is fixed on each of the upper and lower sides of the vibration damping hanger and locked with a retaining ring bolt. At the same time, two bolt mounting holes are further provided on the vibration damping hanger, and the vibration damping hanger is connected to the aircraft frame cross beam through bolts. Each component in the vibration damping hanger structure adopts an assembled structure, which can be repaired specifically to reduce costs.

[0027] The utility model adopts sliding bearings, which are convenient to disassemble and maintain. In addition, a vibration damping pad made of rubber material is arranged in the vibration damping hanger, which can play a role in reducing vibration and effectively improve the NVH performance of the fuselage.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front part", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model.

[0029] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "set", "connected", "fixed", "swivelly connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A vibration damping hanger structure for a transmission shaft, comprising a frame cross beam and a transmission shaft, characterized in that: On one side of the frame cross beam, there is a vibration damping hanger (1), inside which there is a sliding bearing (4), and the sliding bearing (4) is connected to the transmission shaft; On the outer ring of the sliding bearing (4), there is a vibration damping pad (2), and on the vibration damping hanger (1), there is also a retaining ring (3), and the retaining ring (3) is fixedly connected to the vibration damping hanger (1) through a retaining ring bolt (5); On the vibration damping hanger (1), there are also two bolt mounting holes, and the bolt mounting holes connect the vibration damping hanger (1) to the aircraft frame cross beam through bolts.

2. The vibration damping hanger structure for a transmission shaft according to claim 1, characterized in that: The sliding bearing (4) and the vibration damping pad (2) are of an integral structure, and are connected to the transmission shaft by being press-fitted into the vibration damping hanger (1).

3. The vibration damping hanger structure for a transmission shaft according to claim 2, characterized in that: The sliding bearing (4), the vibration damping pad (2) and the vibration damping hanger (1) are connected by an interference fit.

4. The vibration damping hanger structure for a transmission shaft according to claim 1, characterized in that: The retaining ring (3) is fixed at both ends of the vibration damping hanger (1) and is locked through the retaining ring bolts (5).

5. The vibration damping hanger structure for a transmission shaft according to claim 1, characterized in that: The overall material of the vibration damping hanger structure is titanium alloy material.

Images