Agricultural sensor, power device and agricultural machine

Abstract

The invention provides an agricultural sensor, a power device and an agricultural machine, and relates to the technical field of agricultural machines. According to the agricultural sensor provided by the invention, the shaft sleeve component of the shaft sleeve mechanism is provided with the through hole for the shaft to penetrate through, when the shaft bears torque, the shaft sleeve mechanism can rotate relative to the shell mechanism, and when the shell mechanism is relatively fixed, the shaft sleeve mechanism rotates relative to the shell mechanism under the torque action of the shaft; and the magnetic component and the sensing component which are respectively positioned on the shaft sleeve mechanism and the shell mechanism also rotate relatively. In this way, circumferential movement of the magnetic member relative to the sensing mechanism is detected by the sensing mechanism, so that the sensing mechanism obtains torque on the shaft. Compared with the prior art, it is not needed that in the prior art, an existing shaft is divided into two sections, a sensor element is arranged between the two sections of the shaft, and then the two sections of the shaft are connected together in a connecting mode such as a coupler.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural machinery, and in particular to an agricultural sensor, a power device and an agricultural machinery. Background Art

[0002] In the prior art, torque sensors used in agricultural machinery usually adopt a broken shaft installation method, that is, the same shaft is broken into two sections, and then a torque sensor is set between the ends of the two shaft sections, and then the two shaft sections are connected. However, this method of setting the sensor requires the shaft to be broken, which is difficult to apply to existing agricultural machinery, and the sensor setting method is cumbersome, and it is not conducive to sealing and protection between the two shaft sections, which has many disadvantages. Summary of the invention

[0003] In view of this, the present application provides an agricultural sensor, a power device and an agricultural machine, the purpose of which is to solve the above technical problems to a certain extent.

[0004] In a first aspect, the present application provides an agricultural sensor, the agricultural sensor comprising:

[0005] a housing mechanism having a cavity located within the housing mechanism;

[0006] A sleeve mechanism, the sleeve mechanism comprising a sleeve component, the sleeve component having a through hole extending along the axial direction, the through hole being used for the shaft to pass through;

[0007] A plurality of elastic members, wherein the elastic members are connected between the housing mechanism and the sleeve mechanism;

[0008] A magnetic component and a sensing mechanism, wherein the magnetic component is connected to one of the housing mechanism and the sleeve mechanism, and the sensing mechanism is connected to the other of the housing mechanism and the sleeve mechanism;

[0009] In which, the sleeve mechanism can rotate relative to the shell mechanism so that the elastic component is deformed along the circumferential direction. The sensing mechanism is used to detect the circumferential movement of the magnetic component relative to the sensing mechanism, obtain the relative distance of the circumferential movement, and convert it into a torque on the shaft according to the elastic coefficient of the elastic component, wherein the positive and negative direction of the torque is judged according to the relative displacement of the circumferential movement.

[0010] Preferably, the housing mechanism comprises a housing body, the housing body having the cavity, and the housing mechanism further comprises an outer fixing ring, the outer fixing ring is connected to the inner side of the housing body, and the outer fixing ring has a plurality of first recesses located on the inner side of the outer fixing ring and arranged one-to-one with the plurality of elastic members;

[0011] The sleeve mechanism comprises an inner fixing ring, which is sleeved on the outer side of the sleeve member, and has a plurality of second recessed portions located on the outer side of the inner fixing ring and corresponding to the plurality of elastic members one by one;

[0012] Wherein, two sides of the elastic member that are opposite to each other in the radial direction are respectively inserted into the corresponding first recess and the corresponding second recess.

[0013] Preferably, the sleeve mechanism also includes a pressure ring, and the end face of the inner fixed ring on one side in the axial direction has an annular groove connected to the multiple second recesses, and the part of the elastic member inserted into the corresponding second recess has a notch portion whose radial position corresponds to the annular groove, and the pressure ring is embedded in the annular groove and in the notch portion.

[0014] Preferably, a portion of the elastic member located between the outer fixing ring and the inner fixing ring has a smaller dimension in the axial direction than that of the inner fixing ring and smaller than that of the outer fixing ring.

[0015] Preferably, the elastic member is formed into a sheet-like structure, and a large surface of the sheet-like structure is parallel to the axial direction.

[0016] Preferably, the agricultural sensor further comprises a first bearing assembly and a second bearing assembly disposed in the cavity;

[0017] Wherein, the outer rings of the first bearing assembly and the second bearing assembly are both fixed to the housing mechanism, and the inner rings of the first bearing assembly and the second bearing assembly are both fixed to the sleeve member;

[0018] The first bearing assembly and the second bearing assembly seal two sides of the cavity in the axial direction respectively.

[0019] Preferably, the sleeve member has a first shoulder and a second shoulder for positioning the first bearing assembly and the second bearing assembly;

[0020] The cavity has a receiving cavity located on the radially outer side of the shaft segment between the first shoulder and the second shoulder, and the plurality of elastic members are disposed in the receiving cavity.

[0021] Preferably, the housing mechanism comprises a housing body, and the housing body has the cavity;

[0022] The shell body comprises a first shell and a second shell opposite to each other in the axial direction, and the agricultural sensor further comprises a transmission connecting member, which is sleeved on the outer side of the shell body;

[0023] Part of the transmission connection member is also sandwiched between the first shell and the second shell.

[0024] In a second aspect, the present application provides a power device, which includes the agricultural sensor as described above.

[0025] In a third aspect, the present application provides an agricultural machine, which includes the agricultural sensor as described above, and / or includes the power device as described above.

[0026] According to the agricultural sensor provided by the present application, the sleeve member of the sleeve mechanism has a through hole for the shaft to pass through. When the shaft is subjected to torque, the sleeve mechanism can rotate relative to the housing mechanism. When the housing mechanism is relatively fixed, the sleeve mechanism rotates relative to the housing mechanism under the torque of the shaft, thereby causing the magnetic member and the sensing member respectively located in the sleeve mechanism and the housing mechanism to rotate relative to each other. In this way, the sensing mechanism detects the circumferential movement of the magnetic member relative to the sensing mechanism, so that the sensing mechanism obtains the torque on the shaft.

[0027] Compared with the prior art, the agricultural sensor provided in the present application only needs to be sleeved on the shaft, and the rotation generated by its internal structure can be used to obtain the torque on the shaft, without the need to break the existing shaft into two sections as in the prior art, and arrange the sensor element between the two sections of the shaft, and then connect the two sections of the shaft together through a connection method such as a coupling.

[0028] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram showing a two-dimensional image of an agricultural sensor provided according to an embodiment of the present application is shown;

[0031] Figure 2 A schematic diagram showing another two-dimensional image of an agricultural sensor provided according to an embodiment of the present application;

[0032] Figure 3 Shows Figure 2 Schematic diagram of a cross-sectional view of section AA;

[0033] Figure 4 A schematic diagram showing a two-dimensional diagram of an elastic member of an agricultural sensor provided according to an embodiment of the present application;

[0034] Figure 5 A schematic diagram showing a two-dimensional diagram of a partial structure of an agricultural sensor provided according to an embodiment of the present application;

[0035] Figure 6 A schematic diagram showing a three-dimensional diagram of a sensing mechanism of an agricultural sensor provided according to an embodiment of the present application;

[0036] Figure 7 A schematic diagram of an exploded view of an agricultural sensor provided according to an embodiment of the present application is shown.

[0037] Reference numerals:

[0038] 100-shell structure; 110-shell body; 120-cavity; 121-accommodating cavity; 130-first shell; 140-second shell;

[0039] 200-shaft sleeve mechanism; 210-shaft sleeve component; 211-first shaft shoulder; 212-second shaft shoulder;

[0040] 300-elastic member; 310-notch portion; 400-external fixing ring; 410-first recess; 500-inner fixing ring; 510-second recess; 610-annular groove; 620-pressing ring;

[0041] 710-magnetic component; 720-sensing mechanism;

[0042] 810 - first bearing assembly; 820 - second bearing assembly; 900 - transmission connecting piece. DETAILED DESCRIPTION

[0043] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0044] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the 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 application 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 limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0047] According to a first aspect of an embodiment of the present application, an agricultural sensor is provided. Figures 1 to 7 The structure and working principle of agricultural sensors are described in detail.

[0048] According to the agricultural sensor provided in the embodiment of the present application, the agricultural sensor includes a housing mechanism 100, a sleeve mechanism 200, a plurality of elastic members 300, a magnetic member 710 and a sensing mechanism 720. In the embodiment, the housing mechanism 100 has a cavity 120 located inside the housing mechanism 100, the sleeve mechanism 200 includes a sleeve member 210, and the sleeve member 210 has a through hole extending along the axial direction, and the through hole is used for the shaft to pass through.

[0049] In the embodiment, the elastic member 300 is connected between the housing mechanism 100 and the sleeve mechanism 200, the magnetic member 710 is connected to one of the housing mechanism 100 and the sleeve mechanism 200, and the sensing mechanism 720 is connected to the other of the housing mechanism 100 and the sleeve mechanism 200. In the embodiment, the sleeve mechanism 200 can rotate relative to the housing mechanism 100 so that the elastic member 300 is deformed along the circumferential direction, and the sensing mechanism 720 is used to detect the circumferential movement of the magnetic member 710 relative to the sensing mechanism 720, obtain the relative distance of the circumferential movement, and convert it into a torque on the shaft according to the elastic coefficient of the elastic member 300, wherein the positive and negative direction of the torque is determined according to the relative displacement of the circumferential movement.

[0050] Thus, according to the agricultural sensor provided in the embodiment of the present application, the sleeve member 210 of the sleeve mechanism 200 has a through hole for the shaft to pass through. When the shaft is subjected to torque, since the sleeve mechanism 200 can rotate relative to the housing mechanism 100, when the housing mechanism 100 is relatively fixed, the sleeve mechanism 200 rotates relative to the housing mechanism 100 under the torque of the shaft, thereby causing the magnetic member 710 and the sensing member respectively located in the sleeve mechanism 200 and the housing mechanism 100 to rotate relative to each other. In this way, the sensing mechanism 720 detects the circumferential movement of the magnetic member 710 relative to the sensing mechanism 720, so that the sensing mechanism 720 obtains the torque on the shaft.

[0051] Compared with the prior art, the agricultural sensor provided according to the embodiment of the present application only needs to be sleeved on the shaft, and the rotation generated by its internal structure can be used to obtain the torque on the shaft, without the need to break the existing shaft into two sections as in the prior art, and arrange the sensor element between the two sections of the shaft, and then connect the two sections of the shaft together through a connection method such as a coupling.

[0052] In the embodiment, if the above-mentioned existing arrangement of sensor elements is applied to existing agricultural machinery, it is not only necessary to dismantle the original power structure of the agricultural machinery, such as breaking the shaft, but also to add components such as couplings, and increase additional adjustment time. Therefore, the installation is cumbersome and the reliability is poor. In other words, the installation efficiency is low and the use effect is not good.

[0053] In addition, agricultural machinery is mostly located in a field environment, where the terrain and working conditions are harsh. The installation method of the broken shaft will be further affected by the harsh working conditions of the agricultural machinery. In addition, the sensor element is located between two broken shafts, and it is more difficult to take measures to resist external interference on the sensor element. Sewage, dust, gravel, plants and other debris in the working environment of agricultural machinery may impact the sensor element, causing the sensor element to be misaligned or fail.

[0054] In addition, before the present application was proposed, another common measure for measuring torque on a shaft was to use a strain gauge for measurement. That is, a strain gauge is attached to the shaft and connected to a circuit such as a bridge. During the measurement process, the strain gauge is strained as the shaft is subjected to torque, so that the torque of the shaft is fed back to the circuit where the strain gauge is located in the form of its own strain, and the torque on the shaft is obtained by conversion through the material of the strain gauge and the known resistance.

[0055] However, the measurement measure of attaching strain gauges on the shaft is difficult to be applied as sensor elements in agricultural machinery. On the one hand, strain gauges are often used in laboratories because the strain gauges themselves have high requirements for external working conditions. Considering that the strain of the strain gauges is usually invisible to the naked eye, they are too sensitive. Once there is external physical disturbance, their accuracy will be greatly reduced. In addition, because the strain gauges are directly connected to the circuit, if the circuit is subjected to disturbance, the accuracy of the electrical signal output will also be reduced. If the strain gauges are applied to agricultural machinery with harsh working environments, it may be difficult to ensure that the strain gauges are in a condition without physical interference for a long time.

[0056] On the other hand, the working conditions of agricultural machinery are very changeable, which places high demands on the power of the agricultural machinery itself and also leads to many sudden changes in power transmission of agricultural machinery. In other words, the torque of power transmission is large and there are many sudden changes in torque. If strain gauges are used, the electrical signals output by the strain gauges often produce sharp peaks and troughs at the beginning of the torque mutation as the shaft deforms more. If you want to continue to use this electrical signal, you need to remove the sharp peaks and troughs when processing this electrical signal and calculate the equivalent electrical signal, which greatly increases the calculation amount of the agricultural machinery driving computer.

[0057] Compared with traditional solutions such as strain gauges, the agricultural sensor provided according to the embodiment of the present application adopts the circumferential rotational deformation of the housing mechanism 100 relative to the shaft (together with the sleeve mechanism 200). Compared with the deformation of the strain gauge that is imperceptible to the naked eye, the deformation amount of this deformation is larger, and therefore has a buffering effect on the relative rotation between the housing mechanism 100 and the sleeve mechanism 200. This buffering effect avoids sudden changes in the torque signal obtained by the sensing mechanism 720, such as sharp peaks and troughs in the strain gauge solution, and essentially has a filtering effect on such sharp peak and trough signals.

[0058] In addition, in the embodiment, the sensing mechanism 720 and the magnetic member 710 are respectively arranged in the relatively rotating housing mechanism 100 and the sleeve mechanism 200, and the relative rotation of the housing mechanism 100 and the sleeve mechanism 200 is fed back as the relative rotation between the sensing mechanism 720 and the magnetic member 710, so that the rotation of the magnetic member 710 relative to the sensing mechanism 720 is obtained by the sensing mechanism 720 to obtain the torque signal. Therefore, the elastic member 300 and the magnetic member 710 themselves are not in the circuit for obtaining the torque signal, so there is no need to consider the influence of the two on the circuit in the sensing mechanism 720, which effectively improves the anti-interference ability of the agricultural sensor. In the relatively harsh working environment of agricultural machinery, the agricultural sensor provided according to the embodiment of the present application has higher reliability than the existing strain gauge solution.

[0059] In an embodiment, as an example, the magnetic component 710 may be fixedly connected to the sleeve mechanism 200, and the sensing mechanism 720 may be fixedly connected to the housing mechanism 100, and the specific connection form will be described in detail in the subsequent description.

[0060] In an embodiment, the magnetic member 710 may be, for example, a magnetic ring, and the sensing mechanism 720 may include, for example, a circuit having, for example, a Hall sensor, which is used to sense the change in magnetic field caused by the rotation of the magnetic ring to convert it into a torque signal. In an embodiment, the circuit may be integrated on a printed circuit board.

[0061] In an embodiment, the torque signal can be sent outwardly by wired or wireless means, such as to a driving computer of an agricultural machine. As an example, in the example of the accompanying drawings given in the embodiment of the present application, the torque signal can be sent outwardly by wireless means. Therefore, based on the above description, a displacement acquisition module for collecting the circumferential rotation displacement of the magnetic ring, a power supply module for powering the entire circuit, and a wireless transceiver module for sending the torque signal outward can be provided on the above printed circuit board.

[0062] According to the agricultural sensor provided by the embodiment of the present application, as shown in the drawings of the embodiment of the present application, the shell body 110 (the second shell 140, that is, the right shell) included in the shell mechanism 100 can be provided with an axially extending window, which can connect the cavity 120 with the external environment to allow the antenna of the wireless transceiver module to partially extend into the external environment through the window. As an example, the gap between the antenna and the inner side of the window can be sealed by filling with sealant.

[0063] According to the agricultural sensor provided in the embodiment of the present application, in the embodiment, the shell mechanism 100 may include a shell body 110, the shell body 110 may have the above-mentioned cavity 120, the shell mechanism 100 may also include an outer fixing ring 400, the outer fixing ring 400 may be connected to the inner side of the shell body 110, and the outer fixing ring 400 may have a plurality of first recesses 410 located on the inner side of the outer fixing ring 400 and arranged one-to-one with the above-mentioned plurality of elastic members 300.

[0064] Furthermore, in an embodiment, the sleeve mechanism 200 may include an inner fixing ring 500, which may be sleeved on the outer side of the sleeve component 210, and the inner fixing ring 500 may have a plurality of second recesses 510 located on the outer side of the inner fixing ring 500 and corresponding one-to-one to the plurality of elastic components 300.

[0065] On this basis, in the embodiment, two sides of the elastic member 300 that are opposite to each other in the radial direction may be inserted into the corresponding first recess 410 and the corresponding second recess 510 , respectively.

[0066] In this way, according to the agricultural sensor provided in the embodiment of the present application, an outer fixing ring 400 and an inner fixing ring 500 are respectively provided to maintain the above-mentioned multiple elastic components 300 between the outer fixing ring 400 and the inner fixing ring 500, and the outer fixing ring 400 and the inner fixing ring 500 are respectively separated from the shell body 110 and the sleeve component 210, which facilitates the pre-assembly of the above-mentioned multiple elastic components 300 with at least one of the outer fixing ring 400 and the inner fixing ring 500, and then assembles them with the remaining components, thereby reducing the difficulty of assembly and improving assembly efficiency.

[0067] In the embodiment, the first recessed portion 410 may be a first opening opened on the inner side of the outer fixing ring 400, that is, on the inner cylindrical surface, and these first openings may be arranged on the inner side of the outer fixing ring 400 in the form of equally dividing the circumference. Similarly, the second recessed portion 510 may be a second opening opened on the outer side of the inner fixing ring 500, that is, on the outer cylindrical surface, and these second openings may also be arranged on the outer side of the inner fixing ring 500 in the form of equally dividing the circumference. As an example, the circumferential angle between adjacent second openings is the same as the circumferential angle between adjacent first openings.

[0068] According to the agricultural sensor provided by the embodiment of the present application, in the embodiment, the sleeve mechanism 200 further includes a pressing ring 620, and the end surface of one side of the inner fixed ring 500 in the axial direction may have an annular groove 610 connected to the plurality of second recesses 510, and the portion of the elastic member 300 inserted into the corresponding second recess 510 may have a notch portion 310 corresponding to the annular groove 610 in the radial direction, and the pressing ring 620 may be embedded in the annular groove 610 and embedded in the notch portion 310. Therefore, the portion of the elastic member 300 inserted into the second recess 510 is reinforced.

[0069] At the same time, the pressure ring 620 also connects the above-mentioned multiple elastic components 300 as a whole by press-fitting with the pressure ring 620, which is beneficial for these elastic components 300 to deform in a relatively uniform load manner when the above-mentioned multiple elastic components 300 are deformed, so that the relative rotation between the shell mechanism 100 and the sleeve mechanism 200 is closer to the actual rotation caused by the torque on the shaft, thereby improving the accuracy of the agricultural sensor.

[0070] According to the agricultural sensor provided in the embodiment of the present application, in the embodiment, the axial size of the portion of the elastic member 300 located between the outer fixing ring 400 and the inner fixing ring 500 can be smaller than the axial size of the inner fixing ring 500 and smaller than the axial size of the outer fixing ring 400.

[0071] In the embodiment, this means that the axial size of the portion of the elastic member 300 exposed outside the first recess 410 and the second recess 510 is smaller than the axial size of the annular gap defined by the inner fixing ring 500 and the outer fixing ring 400. Therefore, during the circumferential deformation of the elastic member 300, the two axial sides of the elastic member 300 will not be disturbed by the outer components, so that the deformation of the elastic member 300 can better represent the actual deformation caused by the torque, thereby improving the accuracy of the agricultural sensor.

[0072] According to the agricultural sensor provided in the embodiment of the present application, the shell body 110 may include a first shell 130 and a second shell 140 that are opposite to each other in the axial direction, and the agricultural sensor may further include a transmission connection member 900, which may be sleeved on the outer side of the shell body 110. In the embodiment, part of the transmission connection member 900 may also be sandwiched between the first shell 130 and the second shell 140.

[0073] In an embodiment, as an example, the transmission connection 900 can transmit power to a shaft passing through the sleeve member 210. For example, the transmission connection 900 can be a sprocket that can cooperate with a chain or a gear that cooperates with other gears.

[0074] In the embodiment, taking the sprocket as an example, another sprocket can be sleeved on a power output shaft and connected to the sprocket of the agricultural sensor through a chain. When the other power output shaft rotates to output torque, the housing mechanism 100 connected to the sprocket rotates, and the radially inner sleeve mechanism 200 is driven to rotate through the above-mentioned multiple elastic components 300, thereby driving the radially inner shaft of the sleeve mechanism 200 to rotate. In this process, the above-mentioned multiple elastic components 300 are in a deformation state of transmitting torque, and the deformation amount is characterized by the relative rotation amount of the housing mechanism 100 and the sleeve mechanism 200.

[0075] In the embodiment, as an example, the transmission connector 900 may have a through hole for sleeved on the outside of the shell body 110, and the inner edge of the hole may have a thinner thickness (i.e., a smaller axial dimension) for being sandwiched in the gap formed by the first shell 130 and the second shell 140. As an example, a bolt may be used to penetrate the first shell 130, the transmission connector 900, and the second shell 140, and a nut may be screwed on the outside of the bolt for fixing.

[0076] In addition, in the embodiment, as an example, the agricultural sensor can also be set at the end of the shaft. In this example, the transmission connection 900 can also be a coupling, which can be connected to the coupling at the end of the shaft of another power output shaft.

[0077] In an embodiment, according to the agricultural sensor provided in the embodiment of the present application, the elastic member 300 can be formed into a sheet-like structure, and the large surface of the sheet-like structure is parallel to the axial direction. In this case, the elastic member 300 can be formed of three parts as a whole: the parts at both ends in the radial direction can be a rectangle with a larger width, and the part located between the two parts is a rectangle with a smaller width. The middle part and the parts at both ends are transitioned by chamfering.

[0078] In the embodiment, since the large surface of the elastic member 300 is parallel to the axial direction, the length direction of the large surface can be arranged in the radial direction, and the width direction of the large surface can be arranged in the axial direction. Such an arrangement makes it easy for the elastic member 300 to bend and deform in the circumferential direction, but has considerable rigidity in the axial direction. Therefore, the deformation of the elastic member 300 hardly has an axial component, which is conducive to ensuring the stability of the elastic member 300.

[0079] Furthermore, in the embodiment, the outer fixing ring 400 mentioned in the above description may be connected to the first housing 130 via a plurality of safety bolts distributed at intervals in the circumferential direction and penetrating through the first housing 130 and the outer fixing ring 400 .

[0080] According to the agricultural sensor provided in the embodiment of the present application, the agricultural sensor may further include a first bearing assembly 810 and a second bearing assembly 820 disposed in the cavity 120. In the embodiment, the outer rings of the first bearing assembly 810 and the second bearing assembly 820 may be fixed to the housing mechanism 100, and the inner rings of the first bearing assembly 810 and the second bearing assembly 820 may be fixed to the sleeve member 210. In the embodiment, the first bearing assembly 810 and the second bearing assembly 820 may respectively seal both sides of the cavity 120 in the axial direction.

[0081] In the embodiment, both ends of the housing body 110 in the axial direction, that is, the left side of the first housing 130 and the right side of the second housing 140, can be open for the shaft to pass through. Therefore, the first bearing assembly 810 and the second bearing assembly 820 can be used for sealing.

[0082] As an example, in an embodiment, the first bearing assembly 810 and the second bearing assembly 820 may both include only bearings, where the bearings may be, for example, deep groove ball bearings, and the bearings may be bearings with built-in external seals, and the external seals of the bearings may be used to seal both sides of the first shell 130 and the second shell 140.

[0083] In other examples, the first bearing assembly 810 may also include a bearing and an external end cover, and the second bearing assembly 820 may also be the same. The opening on the corresponding shell can be sealed by the end cover, and a sealing ring can be added between the inner hole of the end cover and the shaft.

[0084] According to the agricultural sensor provided by the embodiment of the present application, the sleeve component 210 has a first shoulder 211 and a second shoulder 212 for positioning the first bearing assembly 810 and the second bearing assembly 820, and the cavity 120 of the shell body 110 may have a cavity 121 located on the radially outer side of the shaft segment between the first shoulder 211 and the second shoulder 212, and the above-mentioned multiple elastic components 300 are arranged in the cavity 121. In this way, the above-mentioned multiple elastic components 300 are protected in the cavity 121, and the cavity 121 is sequentially provided with the inner fixing ring 500, the elastic component 300 and the outer fixing ring 400 from the radial inner side to the radial outer side. In an embodiment, the distance from the radial innermost part of the part of the elastic component 300 exposed between the inner fixing ring 500 and the outer fixing ring 400 to the axis of the shaft may be greater than the distance from the outer side of the outer ring of the above-mentioned bearing assembly to the axis of the shaft. In this way, the impact that may be caused to the agricultural sensor during the operation of the agricultural machinery will hardly act directly on the shrapnel, which ensures the stability and accuracy of the agricultural sensor when it is working.

[0085] According to an embodiment of the present application, a power device includes the agricultural sensor as described above, and also includes the above beneficial effects, which will not be repeated here.

[0086] According to an embodiment of the present application, an agricultural machine includes the agricultural sensor mentioned above, and / or includes the power device of the agricultural machine as described above.

[0087] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. All equivalent structural changes made by using the contents of the present application specification and drawings under the innovative concept of the present application, or directly / indirectly applied in other related technical fields are included in the protection scope of the present application.

Claims

1. An agricultural sensor, characterized in that: The agricultural sensor comprises: a housing mechanism having a cavity located within the housing mechanism; A sleeve mechanism, the sleeve mechanism comprising a sleeve component, the sleeve component having a through hole extending along the axial direction, the through hole being used for the shaft to pass through; A plurality of elastic members, wherein the elastic members are connected between the housing mechanism and the sleeve mechanism; A magnetic component and a sensing mechanism, wherein the magnetic component is connected to one of the housing mechanism and the sleeve mechanism, and the sensing mechanism is connected to the other of the housing mechanism and the sleeve mechanism; In which, the sleeve mechanism can rotate relative to the shell mechanism so that the elastic component is deformed along the circumferential direction. The sensing mechanism is used to detect the circumferential movement of the magnetic component relative to the sensing mechanism, obtain the relative distance of the circumferential movement, and convert it into a torque on the shaft according to the elastic coefficient of the elastic component, wherein the positive and negative direction of the torque is judged according to the relative displacement of the circumferential movement.

2. The agricultural sensor according to claim 1, characterized in that: The housing mechanism comprises a housing body, the housing body has the cavity, the housing mechanism further comprises an outer fixing ring, the outer fixing ring is connected to the inner side of the housing body, the outer fixing ring has a plurality of first recesses located on the inner side of the outer fixing ring and arranged one by one corresponding to the plurality of elastic members; The sleeve mechanism comprises an inner fixing ring, which is sleeved on the outer side of the sleeve member, and has a plurality of second recessed portions located on the outer side of the inner fixing ring and corresponding to the plurality of elastic members one by one; Wherein, two sides of the elastic member that are opposite to each other in the radial direction are respectively inserted into the corresponding first recess and the corresponding second recess.

3. The agricultural sensor according to claim 2, characterized in that: The sleeve mechanism also includes a pressure ring, and one side end face of the inner fixed ring in the axial direction has an annular groove connected to the multiple second recesses, and the part of the elastic member inserted into the corresponding second recess has a notch portion whose radial position corresponds to the annular groove, and the pressure ring is embedded in the annular groove and in the notch portion.

4. The agricultural sensor according to claim 2, characterized in that: A size of a portion of the elastic member located between the outer fixing ring and the inner fixing ring in the axial direction is smaller than a size of the inner fixing ring in the axial direction and smaller than a size of the outer fixing ring in the axial direction.

5. The agricultural sensor according to claim 1, characterized in that: The elastic member is formed into a sheet-like structure, and a large surface of the sheet-like structure is parallel to the axial direction.

6. The agricultural sensor according to claim 1, characterized in that: The agricultural sensor further includes a first bearing assembly and a second bearing assembly disposed in the cavity; Wherein, the outer rings of the first bearing assembly and the second bearing assembly are both fixed to the housing mechanism, and the inner rings of the first bearing assembly and the second bearing assembly are both fixed to the sleeve member; The first bearing assembly and the second bearing assembly seal two sides of the cavity in the axial direction respectively.

7. The agricultural sensor according to claim 6, characterized in that: The sleeve member has a first shoulder and a second shoulder for positioning the first bearing assembly and the second bearing assembly; The cavity has a receiving cavity located on the radially outer side of the shaft segment between the first shoulder and the second shoulder, and the plurality of elastic members are disposed in the receiving cavity.

8. The agricultural sensor according to claim 1, characterized in that: The housing mechanism comprises a housing body, and the housing body has the cavity; The shell body comprises a first shell and a second shell opposite to each other in the axial direction, and the agricultural sensor further comprises a transmission connecting member, which is sleeved on the outer side of the shell body; Part of the transmission connection member is also sandwiched between the first shell and the second shell.

9. A power device, characterized in that: The power device comprises the agricultural sensor according to any one of claims 1 to 8.

10. An agricultural machine, characterized in that: The agricultural machine comprises the agricultural sensor according to any one of claims 1 to 8, and / or comprises the power device according to claim 9.

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