Combined harvester threshing cylinder driving shaft torque and rotating speed integrated sensor

Abstract

The utility model discloses a torque and rotating speed integrated sensor for a driving shaft of a threshing cylinder of a combine harvester, and belongs to the technical field of rotating shaft torque and rotating speed sensors. Comprising a stress strain elastomer and a rotating speed detection device, the stress strain elastic body and the rotating speed detection device are integrally integrated on the universal joint structure; the device further comprises a signal acquisition board and an electronic circuit box, the signal acquisition board is fixed on the universal joint structure, and the electronic circuit box is fixed on the combine harvester body; the acquisition plate protection cover is fixed on the universal joint structure and is used for protecting the signal acquisition plate; and the bearing end cover is fixed on the strain elastic body and is used for locking the driving shaft of the threshing cylinder and the stress strain elastic body. According to the utility model, the rotating shaft torque detection sensor and the rotating speed sensor are integrated on the universal joint structure, so that the installation space is saved, strain gauges do not need to be arranged on the rotating shaft, and the detection precision and stability are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field, and in particular relates to an integrated sensor for the torque and speed of a driving shaft of a threshing drum of a combine harvester. Background Art

[0002] Real-time detection of the load status of the combine harvester is crucial for low-loss and high-efficiency regulation of the machine and ensuring national food security. As an important structural unit of the combine harvester, the threshing drum is responsible for threshing and separating the straw-seed mixture cut by the header and transported across the bridge. The torque and speed information of its active shaft can better characterize the load status of the combine harvester. The torque detection principle of the active shaft is to convert the mechanical deformation of the shaft caused by external force into an electrical signal, and the speed detection principle is to detect the mark on the rotating shaft through the Hall element, and then calculate the pulse signal per unit time to obtain it.

[0003] In conventional rotating shaft torque and speed detection solutions, the torque sensor and the speed sensor are usually two independent components, which usually require a larger installation space, and the two sensors need to be wired separately, resulting in a messy wiring harness.

[0004] Most of the existing rotating shaft torque sensors are detected by sticking strain gauges on the rotating shaft. For example, the patent with patent publication number CN111656951B discloses a torque sensor for the active shaft of a cutting platform, including a first housing, a first power supply, a collection circuit voltage stabilization module, an output voltage stabilization module, a first Huygens bridge, an amplifier circuit, a collection circuit and a first ZigBee transmission module. The first Huygens bridge is an equal-arm full bridge composed of multiple strain gauges pasted along the axial direction at 45°. The first power supply is mainly used to power the first Huygens bridge pasted on the active shaft of the cutting platform through the output voltage stabilization module. The first Huygens bridge is used to generate a first voltage change signal when the active shaft of the cutting platform is strained by torque. The first voltage change signal is sent by the first ZigBee transmission module through the amplifier circuit collection circuit.

[0005] The above patent has obvious beneficial effects, but still has the following shortcomings in actual operation:

[0006] In the above-mentioned comparative documents, multiple strain gauges are used to form a Huygens bridge to detect torque signals, and the signals are sent through a ZigBee transmission module. However, in actual operation, the field harvesting environment of a combine harvester is extremely harsh, resulting in a lot of signal noise generated by the strain gauges and large data jumps. Since the strain gauges are attached to the rotating shaft, the signals cannot be transmitted through the wiring harness and can only be transmitted wirelessly. The ZigBee transmission used will cause packet loss, resulting in the inability to obtain torque signals. Therefore, there is an urgent need in the art to improve the torque speed sensor of the active shaft of the threshing drum of the combine harvester to solve the defects of the prior art. Utility Model Content

[0007] In view of the above analysis, an embodiment of the utility model aims to provide a torque and speed integrated sensor for a threshing drum driving shaft of a combine harvester, so as to solve one or more of the above problems existing in the prior art.

[0008] The purpose of the utility model is achieved in this way:

[0009] A torque and speed integrated sensor for a threshing drum driving shaft of a combine harvester, comprising:

[0010] Stress-strain elastic body and rotation speed detection device;

[0011] The stress-strain elastic body and the rotation speed detection device are integrated into a universal joint structure; it also includes a signal acquisition board and an electronic circuit box, the signal acquisition board is fixed on the universal joint structure, and the electronic circuit box is fixed on the combine harvester body; it also includes a collection board protection cover fixed on the universal joint structure for protecting the signal collection board and a bearing end cover fixed on the strain elastic body for locking the threshing drum driving shaft and the stress-strain elastic body.

[0012] Furthermore, the speed detection device includes a rotor coil installed on the stress-strain elastic body structure, a Hall speed meter installed on the rotor coil, a stator coil and a magnet mounting seat installed on the stator coil, and the stator coil is fixed to the combine harvester casing structure through a stator mounting bracket.

[0013] Furthermore, the stator coil is kept at a certain distance from the rotor coil through the bearing.

[0014] Furthermore, the strain signal generated by the stress-strained elastic body and the pulse signal generated by the speed detection device are acquired by a signal acquisition board. The signals acquired by the signal acquisition board are processed by an electronic circuit box to transmit torque and speed signals to the upper computer software.

[0015] Furthermore, the pulse signal is obtained by the Hall tachometer during the rotation process by detecting the magnet mounting seat.

[0016] Furthermore, the electronic circuit box is mainly responsible for coil data coupling, power supply, torque calculation and communication command processing.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] a) The utility model provides an integrated torque and speed sensor for the active shaft of the threshing drum of a combine harvester, which integrates a stress-strain elastic body and a speed detection device into a universal joint structure. When the belt drives the universal joint to rotate, the rotating shaft of the threshing drum is thereby driven to rotate. Under the action of the load, the stress-strain elastic body is deformed. At this time, the stress-strain elastic body and the speed detection device can accurately detect the torque and speed in real time, thus realizing the integrated application of the torque sensor and the speed sensor. Only one signal line needs to be drawn out from the universal joint structure to obtain the torque and speed signals, thus meeting the requirement of a smaller installation space.

[0019] b) The utility model provides an integrated sensor for the torque and speed of the active shaft of the threshing drum of a combine harvester. A stress-strain elastic body is provided to detect the torque signal of the active shaft of the threshing drum. There is no need to stick multiple strain gauges on the shaft. The detection signal is stable and the signal is transmitted through a signal line, so the transmission is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A three-dimensional schematic diagram of a torque and speed integrated sensor for a threshing drum driving shaft of a combine harvester provided by the utility model;

[0022] Figure 2 A schematic cross-sectional view of the torque and speed integrated sensor for the driving shaft of the threshing drum of a combine harvester provided by the utility model;

[0023] Figure 3 A structural diagram of a speed detection device of a torque speed integrated sensor for a driving shaft of a threshing drum of a combine harvester provided by the utility model;

[0024] Figure 4 A schematic diagram of the structure of the stress-strain elastic body of the torque-speed integrated sensor for the driving shaft of the threshing drum of a combine harvester provided by the utility model;

[0025] Figure 5 A schematic diagram of data acquisition and transmission of the integrated torque and speed sensor for the active shaft of the threshing drum of a combine harvester provided by the utility model. DETAILED DESCRIPTION

[0026] 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. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments disclosed in this disclosure can be combined, separated, interchanged and / or rearranged with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] In the accompanying drawings, the size and relative size of components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments may be implemented differently, a specific process sequence may be performed in a different order than described. For example, two successively described processes may be performed substantially simultaneously or in an order opposite to the order described. In addition, the same reference numerals represent the same components.

[0028] Example 1

[0029] A specific embodiment of the utility model is as follows Figure 1-5 As shown, a torque and speed integrated sensor for a driving shaft of a threshing drum of a combine harvester is disclosed, comprising:

[0030] A stress-strain elastic body 1 and a rotation speed detection device 2, wherein the stress-strain elastic body 1 and the rotation speed detection device 2 are integrated in one piece on a universal joint structure 3; further comprising a signal acquisition board 4 and an electronic circuit box 5, wherein the signal acquisition board 4 is fixed on the universal joint structure, and the electronic circuit box 5 is fixed on a combine harvester body; further comprising a collection board protection cover 6 fixed on the universal joint structure 3 for protecting the signal collection board 4, and a bearing end cover 7 fixed on the strain elastic body 1 for locking the threshing drum driving shaft and the stress-strain elastic body 1.

[0031] For details, please refer to Figure 3 The speed detection device 2 includes a rotor coil 8 installed on the stress-strain elastic body 1 structure, a Hall speed meter 9 installed on the rotor coil 8, a stator coil 10 and a magnet mounting seat 11 installed on the stator coil 10. The stator coil 10 is fixed to the combine harvester casing structure through a stator mounting bracket 12, and the stator coil 10 maintains a certain distance from the rotor coil 8 through a bearing 13.

[0032] For details, please refer to Figure 5 The data collected by the signal acquisition board 4 is transmitted to the electronic circuit box 5, and the data processed by the electronic circuit box is obtained by the host computer software 14.

[0033] The working principle and use process of the utility model: when the product is used, the sensor is connected to the driving shaft of the threshing drum. When the combine harvester is working, the engine outputs power to drive the universal joint structure 3 to rotate, thereby driving the driving shaft of the threshing drum to rotate. Because the stress-strain elastic body 1 and the universal joint structure 3 are an integrated structure, the stress-strain elastic body 1 rotates at the same time. The bearing end cover 7 is used to lock the driving shaft of the threshing drum and the stress-strain elastic body 1 to prevent relative rotation, which leads to inaccurate torque measurement. Under the action of the load, the stress-strain elastic body 1 senses torsional deformation, and the signal acquisition board 4 converts the mechanical deformation into an electrical signal and performs AD conversion output. Because the actual field harvesting environment is complex, the acquisition board protective cover 6 is used for the signal acquisition board 4, because the rotor coil 8 is installed on the stress-strain elastic body 1, and the Hall speed meter 9 is installed on the rotor coil 8, so the rotor coil 8 and the Hall speed meter 9 rotate integrally with the stress-strain elastic body 1, and the stator coil 10 is fixed to the harvester shell structure through the stator mounting bracket 12, and the magnet mounting seat 11 is installed on the stator coil 10, and is fixed to the harvester shell structure together with the stator coil 10. The Hall speed meter 9 detects the number of times the magnet mounting seat 11 is rotated during the rotation process and generates a pulse signal, and the pulse signal is obtained by the signal acquisition board 4. The deformation electrical signal and pulse signal obtained by the signal acquisition board 4 are transmitted to the electronic circuit box 5 through the wiring harness, and the coil data coupling, power supply, torque calculation and communication command processing are performed, and the processed signal is transmitted to the host computer software 14.

[0034] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A torque and speed integrated sensor for the driving shaft of a threshing drum of a combine harvester, characterized in that: include: A stress-strain elastic body (1) and a rotation speed detection device (2); The stress-strain elastic body (1) and the rotation speed detection device (2) are integrated in one piece on a universal joint structure (3); the device also includes a signal acquisition board (4) and an electronic circuit box (5), wherein the signal acquisition board (4) is fixed on the universal joint structure (3), and the electronic circuit box (5) is fixed on a combine harvester body; the device also includes a collection board protection cover (6) fixed on the universal joint structure (3) for protecting the signal acquisition board (4), and a bearing end cover (7) fixed on the strain elastic body (1) for locking the threshing drum driving shaft and the stress-strain elastic body (1).

2. The torque and speed integrated sensor for the driving shaft of the threshing drum of a combine harvester according to claim 1, characterized in that: The speed detection device (2) comprises a rotor coil (8) mounted on a stress-strain elastic body (1) structure, a Hall speed meter (9) mounted on the rotor coil (8), a stator coil (10), and a magnet mounting seat (11) mounted on the stator coil (10); the stator coil (10) is fixed to the outer shell structure of the combine harvester via a stator mounting bracket (12).

3. The torque and speed integrated sensor for the driving shaft of the threshing drum of a combine harvester according to claim 2, characterized in that: The stator coil (10) is kept at a certain distance from the rotor coil (8) via a bearing (13).

4. The torque and speed integrated sensor for the driving shaft of the threshing drum of a combine harvester according to claim 1, characterized in that: The strain signal generated by the stress-strain elastic body (1) and the pulse signal generated by the speed detection device (2) are acquired by a signal acquisition board (4). The signals acquired by the signal acquisition board (4) are processed by an electronic circuit box (5) and the torque and speed signals are transmitted to the upper computer software (14).

5. The torque and speed integrated sensor for the driving shaft of the threshing drum of a combine harvester according to claim 4, characterized in that: The pulse signal is obtained by the Hall tachometer (9) during the rotation process by detecting the magnet mounting seat (11).

6. The torque and speed integrated sensor for the driving shaft of the threshing drum of a combine harvester according to claim 4, characterized in that: The electronic circuit box (5) is mainly responsible for coil data coupling, power supply, torque calculation and communication command processing.

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