CN218662413U

CN218662413U - Elastic body of torque sensor for unmanned aerial vehicle

Info

Publication number: CN218662413U
Application number: CN202223057393.9U
Authority: CN
Inventors: 姚奥林; 姚明华; 戴兴; 戴福梅; 方志高
Original assignee: Changzhou Changrong Electronics Co ltd
Current assignee: Changzhou Changrong Electronics Co ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-03-21
Anticipated expiration: 2032-11-17

Abstract

The utility model discloses a torque sensor's for unmanned aerial vehicle elastomer, its characterized in that: including the elastic shaft sleeve, the elastic shaft sleeve is whole to be hollow structure, the elastic shaft sleeve includes load portion and connecting portion, is equipped with the portion of meeting an emergency between load portion and the connecting portion, both sides in the portion of meeting an emergency are equipped with the district of meeting an emergency, it has the foil gage to bond on the district of meeting an emergency, the area of district of meeting an emergency accounts for the quarter of the portion of meeting an emergency external surface area, the setting of load portion is hugged closely to the district of meeting an emergency. The utility model discloses can promote the moment of torsion precision of collection.

Description

Elastic body of torque sensor for unmanned aerial vehicle

Technical Field

The utility model belongs to the technical field of torque sensor, concretely relates to torque sensor's elastomer for unmanned aerial vehicle.

Background

Along with social progress and technological development, unmanned aerial vehicles play an important role in various industries. Through carrying on different sensors, unmanned aerial vehicle can be applied to fields such as military affairs, agriculture and forestry and logistics industry. The power system is an important component of an unmanned aerial vehicle system, and the power system refers to a part of the unmanned aerial vehicle for driving the unmanned aerial vehicle to fly to provide energy. Oil-driven and electric designs are common. The mainstream design scheme at present is mainly electric. The power system of the micro electric unmanned aerial vehicle has multiple indexes, wherein the torque index has important significance for evaluating the performance of the power system of the electric unmanned aerial vehicle in different aspects.

The existing torque detection of the unmanned aerial vehicle is acquired through a torque sensor, for example, the Chinese patent with the application number of 2021233904727 discloses a power test system of a micro unmanned aerial vehicle, in the system, a guide rail is horizontally arranged and fixedly installed on a fixing device, and a dowel bar is arranged on the guide rail in a sliding manner and can horizontally slide along the guide rail; the pressure sensor is arranged on the fixing device and is contacted with one end of the dowel bar; the torque sensor is arranged at the other end of the dowel bar, and a motor mounting bottom plate which can be connected with a power device of the micro unmanned aerial vehicle is arranged on the torque sensor; the rotating speed detection unit is arranged at a position capable of detecting the rotating speed of the power device of the micro unmanned aerial vehicle; pressure sensor, torque sensor and rotational speed detecting element all are connected with signal acquisition preprocessing circuit, and signal acquisition preprocessing circuit can also link to each other with miniature unmanned aerial vehicle power device battery. The utility model discloses data such as thrust, moment of torsion, rotational speed, voltage, electric current and power that can the simultaneous measurement driving system provide the data support for whole micro unmanned aerial vehicle's driving system.

The torque sensor has the specific principle that strain gauges are symmetrically arranged on the outer surface of a cylinder in the middle of a torque transmission shaft on the torque sensor along the circumferential direction, and when the torque transmission shaft receives torque from an external power system, the strain gauges deform to generate a voltage signal; and finally, outputting the voltage signal to obtain a torque value. However, in the current structure scheme, the distance between the strain gauge and the end part of the torque transmission shaft is far, and the induction deformation has certain hysteresis, so that the measurement precision is easily influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a torque sensor's for unmanned aerial vehicle elastomer, including the elastic shaft cover, the elastic shaft cover is whole to be hollow structure, the elastic shaft cover includes load portion and connecting portion, is equipped with strain portion between load portion and the connecting portion, both sides in the strain portion are equipped with the strain area, it has the foil gage to bond on the strain area, the area of strain area accounts for strain portion external surface area's fourth, the setting of load portion is hugged closely to the strain area.

Preferably, the length of the strain zone is 16mm, and the width of the strain zone is 15mm.

Preferably, the inner diameter of the strain part is 22mm, and the outer diameter of the strain part is 30mm.

Preferably, the inner side wall of the load part is uniformly provided with spline teeth, and the number of the spline teeth is 18.

Preferably, the surface of the spline tooth is provided with a carburized layer, and the thickness of the carburized layer is 0.4-0.6mm.

The utility model has the advantages that: the district of meeting an emergency in this application scheme is close apart from load portion distance, when load portion through the spline with unmanned aerial vehicle driving system's driving shaft is connected and is carried out the moment of torsion and detect, the driving shaft passes through load portion with torsion and transmits for whole elastic shaft sleeve, the portion of meeting an emergency also can be because the moment of torsion produces small deformation, thereby the district of meeting an emergency compares in traditional scheme because more be close load portion can be so that the foil gage of pasting on it responds to deformation more fast and send electrical signal, avoid because deformation hysteresis influences the detection precision.

Drawings

FIG. 1 is a three-dimensional structure of the present invention;

FIG. 2 is a front view of the present invention;

fig. 3 is a cross-sectional view of the present invention;

fig. 4 is a cross-sectional view of the present invention;

in the figure: the device comprises an elastic shaft sleeve 1, a load part 2, a connecting part 3, a strain part 4, a strain area 5 and spline teeth 6.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Also, when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "fixedly attached" to another element, it can be fixedly attached by welding, bolting, gluing, or the like. In conclusion, the specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1-4, an elastomer of a torque sensor for an unmanned aerial vehicle, including an elastic shaft sleeve 1, the elastic shaft sleeve 1 is a hollow structure as a whole, the elastic shaft sleeve 1 includes a load part 2 and a connecting part 3, a strain part 4 is arranged between the load part 2 and the connecting part 3, two sides on the strain part 4 are provided with strain zones 5, strain gauges are bonded on the strain zones 5, the strain zones 5 are closely attached to the load part 2, so that the strain is induced more quickly, the area of the strain zones 5 occupies one fourth of the outer surface area of the strain part 4, so that a certain hysteresis error can be reduced, the length of the strain zones 5 is 16mm, the width of the strain zones 5 is 15mm, the inner diameter L1 of the strain part 4 is 22mm, the outer diameter L2 of the strain part 4 is 30mm, the cross-section height of the strain zones 5mm, spline teeth 6 are uniformly arranged on the inner side wall of the load part 2, the number of the spline teeth 6 is 18, if the number of teeth is less than 18, the number of teeth is lower, the modulus is larger, the depth of teeth is deeper, the material is removed, if the number of teeth is larger than 18, and the number of teeth is inconvenient, and the measurement is too many. The surface of the spline tooth 6 is provided with a carburized layer, the thickness of the carburized layer is 0.4-0.6mm, the carburized layer can enable the surface of the spline tooth 6 to obtain high hardness and wear resistance, and the center of the carburized layer can keep certain strength and high plasticity and toughness. The length of whole load portion 2 is 15.75mm, and the front end of load portion 2 is seted up the ring channel, and the diameter of ring channel is 27mm.

The distance of strain zone 5 in this embodiment scheme is close to load portion 2, when load portion 2 is connected with unmanned aerial vehicle driving system's power shaft through the spline and carries out the moment of torsion and detect, the power shaft passes through load portion 2 with torsion and transmits for whole elastic shaft sleeve 1, strain portion 4 also can be because the moment of torsion produces small deformation, thereby strain zone 5 compares in traditional scheme because be closer to load portion 2 can make the foil gage of pasting on it respond to deformation more fast and send electrical signal, avoid because deformation hysteresis influences the detection precision.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An elastomer of a torque sensor for an unmanned aerial vehicle, characterized in that: including elastic shaft sleeve (1), elastic shaft sleeve (1) is whole to be hollow structure, elastic shaft sleeve (1) is equipped with between load portion (2) and connecting portion (3) strain portion (4) including load portion (2) and connecting portion, both sides on strain portion (4) are equipped with strain zone (5), it has the foil gage to bond on strain zone (5), the area of strain zone (5) accounts for strain portion (4) external surface area's fourth, load portion (2) setting is hugged closely in strain zone (5).

2. The elastic body of the torque sensor for the unmanned aerial vehicle according to claim 1, wherein: the length of the strain zone (5) is 16mm and the width of the strain zone (5) is 15mm.

3. The elastic body of the torque sensor for the unmanned aerial vehicle according to claim 2, wherein: the internal diameter of the strain part (4) is 22mm, and the external diameter of the strain part (4) is 30mm.

4. The elastic body of the torque sensor for the unmanned aerial vehicle according to claim 3, wherein: the utility model discloses a load portion (2) is characterized in that evenly be equipped with spline tooth (6) on the inside wall of load portion (2), the quantity of spline tooth (6) is 18.

5. The elastic body of the torque sensor for the unmanned aerial vehicle according to claim 4, wherein: the surface of the spline tooth (6) is provided with a carburized layer, and the thickness of the carburized layer is 0.4-0.6mm.