Header height sensor and semi-feed combine

Abstract

The utility model relates to a cutting platform height sensor and half feeding combine harvester relates to the technical field of harvester, wherein, a cutting platform height sensor, including sensor body and ground arm, sensor body rotationally connected with input shaft, input torsional spring is equipped with input shaft cover, and the both ends of input torsional spring are fixedly connected in sensor body and ground arm respectively, and one end of ground arm is fixedly connected in input shaft, still include support body, and the support body includes the fixed plate for being detachably connected in the abdomen of the divider and the support arm of one end fixedly connected in one end of fixed plate, and the other end fixedly connected with the pivot for rotatably installing sensor body of support arm, and the pivot cover is equipped with force torsional spring, and the both ends of force torsional spring are fixedly connected in support arm and sensor body respectively. The utility model can guarantee the consistency of stubble height when operating, and can protect equipment in non - operating or high - risk scene, improves overall use effect and life.

Description

Technical Field

[0001] This utility model relates to the field of harvester technology, and in particular to a header height sensor and a semi-feeding combine harvester. Background Technology

[0002] Semi-feed combine harvesters are important agricultural equipment widely used in my country, and their performance directly affects the efficiency and quality of grain harvesting. In the operation of traditional semi-feed combine harvesters, the raising and lowering of the header is entirely dependent on manual operation by the driver. Specifically, the driver must observe the undulations of the field ahead and continuously manually operate the header raising and lowering handle located in the cab, adjusting the header's height above the ground by controlling the extension and retraction of the hydraulic cylinders. This operating mode is the standard technical solution adopted by the vast majority of current models.

[0003] However, the aforementioned traditional manual control methods have significant drawbacks and limitations. Due to the uneven surface of the fields, especially in hilly and mountainous areas where ground undulations are more frequent, drivers must maintain high concentration, constantly anticipating road conditions and frequently and repeatedly operating the lifting handle to ensure consistent stubble height and avoid soil scooping by the divider. This process not only greatly increases the driver's workload and mental fatigue but also severely restricts operational efficiency. At high operating speeds, the driver's manual reaction speed cannot keep up with the rapid changes in the ground, easily leading to untimely and inaccurate control of the header height, hindering high-quality harvesting. Therefore, the core problem of existing technology lies in the lack of automatic adjustment capability for the header height. The lag and inaccuracy of manual control often result in the header being too low, causing the divider to insert into the ground, resulting in harvested plants with soil, which in turn causes blockages in the conveyor system, increased threshing load, and even damage to critical components such as the header. This not only increases the failure rate and maintenance costs but also forces drivers to reduce speed to ensure work quality, seriously affecting the harvester's operational efficiency and user experience.

[0004] To address the aforementioned issues, Chinese Patent Publication No. CN207040233U discloses a header height sensor based on angle information feedback. One end of the connecting arm is hinged to the mounting bracket, and the other end is connected to one end of the contour arm, with the other end of the contour arm abutting the harvesting ground. A torsion spring is provided between one end of the connecting arm and the mounting bracket, with both ends of the torsion spring connected to the mounting bracket and one end of the connecting arm, respectively. A divider connecting plate is hinged to the mounting bracket and directly connected to the angle sensor on the hinged pin A. Pin A is linked to the mounting bracket, and the divider on the harvester is mounted on the divider connecting plate. The contour arm rotates the mounting bracket via the torsion spring as the terrain of the harvesting ground changes. The angle sensor collects the angle change signal of the contour arm, and the contour arm remains in contact with the harvesting ground through the torsion spring.

[0005] Using the aforementioned header height sensor, the other end of the contour arm remains in contact with the harvesting ground under the action of a torsion spring. When moving from low to high terrain, the contour arm and connecting arm drive the mounting bracket to rotate via the torsion spring, which in turn drives pin A to rotate via the connecting end. This transmits the angle change information to the angle sensor, which outputs the change in contour angle as a signal to the harvester's control terminal, thereby controlling the harvester's header to descend for precise control. However, with this header height sensor, the contour arm is always in an extended working state, posing significant operational risks and potential equipment damage in various scenarios, including non-operational relocation, reversing, encountering hard obstacles in the field, handling extreme crop conditions, and equipment maintenance. For example, collisions during transport can easily cause structural damage; reversing can interfere with crops or implements; encountering hard objects such as stones or tree roots may cause false alarms or mechanical breakage; and under extremely low crop conditions, it may even penetrate the soil, causing blockages. Furthermore, it greatly inconveniences daily maintenance and cleaning. Utility Model Content

[0006] This utility model provides a header height sensor and a semi-feeding combine harvester, which can ensure the consistency of stubble height during operation and protect the equipment in non-operational or high-risk scenarios, thereby improving the overall performance and lifespan.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a cutting table height sensor, including a sensor body and a grounding arm. The sensor body is rotatably connected to an input shaft, and the input shaft is fitted with an input torsion spring. The two ends of the input torsion spring are respectively fixedly connected to the sensor body and the grounding arm, and one end of the grounding arm is fixedly connected to the input shaft. The sensor body also includes a support body, which includes a fixing plate for detachably connecting to the belly of the divider and a support arm fixedly connected to one end of the fixing plate. The other end of the support arm is fixedly connected to a rotating shaft for rotatably mounting the sensor body. The rotating shaft is fitted with a force-applying torsion spring, and the two ends of the force-applying torsion spring are respectively fixedly connected to the support arm and the sensor body. A retractable space is formed between the rotating shaft and the fixing plate for the sensor body and the grounding arm to rotate simultaneously, and the fixing plate is located on the rotation path of the other end of the grounding arm.

[0008] The beneficial effects of this utility model are: in the working state, the grounding arm always remains in contact with the ground under the action of the input torsion spring, and when passing through the raised ground, the sensor body receives the rotation information of the grounding arm and transmits the angle to the harvester control terminal to realize the control of the header height. At the same time, the fixed plate, the rotating shaft and the force-applying torsion spring are set so that the sensor body and the grounding arm can be retracted into the retractable space to protect the equipment in non-operation or high-risk scenarios, and improve the overall use effect and life.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, it also includes a sensor cover rotatably mounted on the rotating shaft, the sensor body being fixedly mounted inside the sensor cover, and one end of the force-applying torsion spring being fixedly connected to the sensor cover.

[0011] Furthermore, the sensor cover is detachably connected to a limiting screw, which overlaps the upper side of the support arm.

[0012] Furthermore, the support arm is fixedly connected to a limiting rod, the limiting rod is parallel to the rotating shaft, and the limiting rod and the rotating shaft are simultaneously clamped at one end of the force-applying torsion spring; the sensor cover is fixedly connected to a positioning rod, the positioning rod is parallel to the rotating shaft, and the positioning rod and the rotating shaft are simultaneously clamped at the other end of the force-applying torsion spring.

[0013] Furthermore, the sensor cover is fixedly connected to a protective cylinder, the positioning rod, the rotating shaft, and the force-applying torsion spring are all located inside the protective cylinder, and the protective cylinder abuts against the support arm.

[0014] Furthermore, the support body also includes a rod and a fastening screw. One end of the rod is fixedly connected to the fixing plate, and the other end is used to insert into the sleeve of the divider. The fastening screw is used to be threaded into the sleeve of the divider and abuts against the side wall of the rod.

[0015] Furthermore, the support body also includes an anti-rotation torsion spring and an anti-rotation pin. The anti-rotation torsion spring is used to be sleeved on the divider. One end of the anti-rotation pin is fixedly connected to the fixing plate, and the other end is inserted between the two free ends of the anti-rotation torsion spring. The two free ends of the anti-rotation torsion spring respectively abut against the opposite sides of the anti-rotation pin.

[0016] Furthermore, the grounding arm includes a connecting plate fixedly connected to the input shaft, an adapter plate fixedly connected to the connecting plate at one end, and a ground contact plate fixedly connected to the adapter plate at the other end. The other end of the adapter plate extends laterally within the retractable space.

[0017] Furthermore, the other end of the adapter plate extends laterally to the side wall of the sensor body, and the sensor body is fixedly connected to a limiting stage, which is located on the rotation path of the adapter plate with the input shaft as the rotation axis.

[0018] This utility model also provides a semi-feeding combine harvester, including at least one header height sensor. Attached Figure Description

[0019] Figure 1This is a diagram showing the installation structure of the cutting table height sensor of this utility model, in its working state; Figure 2 For the present utility model Figure 1 Enlarged view of section A in the middle; Figure 3 For the present utility model Figure 1 Another perspective on the structure diagram; Figure 4 For the present utility model Figure 3 A partial exploded view; Figure 5 This is a partial structural diagram of the cutting table height sensor of this utility model, showing it in a folded state; Figure 6 For the present utility model Figure 5 Enlarged view of section B; Figure 7 This is a partial exploded view of the structure of this utility model; Figure 8 For the present utility model Figure 7 A magnified view of a portion of the image; Figure 9 For the present utility model Figure 8 First enlarged view of the area; Figure 10 For the present utility model Figure 8 Second enlarged view of the area; Figure 11 This is a partial structural diagram of the semi-feeding combine harvester of this utility model.

[0020] The attached diagram lists the components represented by each number as follows: 1. Support body; 11. Fixing plate; 12. Support arm; 121. Limiting rod; 13. Insert rod; 14. Fastening screw; 15. Anti-rotation torsion spring; 16. Anti-rotation pin; 2. Shaft; 21. Force-applying torsion spring; 3. Sensor body; 31. Input shaft; 32. Input torsion spring; 33. Limiting stage; 4. Grounding arm; 41. Connecting plate; 42. Adapter plate; 43. Ground contact plate; 5. Sensor cover; 51. Limit screw; 52. Positioning rod; 53. Protective sleeve; 6. Divider; 61. Sleeve; 7. Cutting table frame. Detailed Implementation

[0021] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0022] Example 1 like Figures 1-10 This utility model provides a cutting table height sensor, including a sensor body 3 and a grounding arm 4. The sensor body 3 is rotatably connected to an input shaft 31. An input torsion spring 32 is sleeved on the input shaft 31. The two ends of the input torsion spring 32 are respectively fixedly connected to the sensor body 3 and the grounding arm 4, and one end of the grounding arm 4 is fixedly connected to the input shaft 31. The device also includes a support body 1. The support body 1 includes a fixing plate 11 for detachably connecting to the belly of the divider 6 and a support arm 12 for fixing one end to the fixing plate 11. The other end of the support arm 12 is fixedly connected to a rotating shaft 2 for rotatably mounting the sensor body 3. A force-applying torsion spring 21 is sleeved on the rotating shaft 2. The two ends of the force-applying torsion spring 21 are respectively fixedly connected to the support arm 12 and the sensor body 3. A retractable space is formed between the rotating shaft 2 and the fixing plate 11 for the sensor body 3 and the grounding arm 4 to rotate simultaneously. The fixing plate 11 is located on the rotation path of the other end of the grounding arm 4.

[0023] The beneficial effects of this embodiment are as follows: In the working state, the grounding arm 4 always remains in contact with the ground under the action of the input torsion spring 32. When passing through a raised ground, the sensor body 3 receives the rotation information of the grounding arm 4 and transmits the angle to the harvester control terminal to realize the control of the header height. At the same time, the support arm 12, the rotating shaft 2 and the force-applying torsion spring 21 are set so that the sensor body 3 and the grounding arm 4 can be retracted into the retractable space to protect the equipment in non-operation or high-risk scenarios, thereby improving the overall use effect and lifespan.

[0024] Specifically, in operation, the header height sensor moves forward with the divider 6, and the other end of the grounding arm 4 touches the ground. When there is a protrusion on the ground, the grounding arm 4 rotates around the input shaft 31 as the central axis, and the input shaft 31 rotates synchronously. The sensor body 3 detects the rotation angle of the input shaft 31 and transmits the angle information to the harvester's control terminal. The harvester's control terminal controls the header to rise, thereby ensuring the consistency of the stubble height during operation. As the header height rises, the grounding arm 4 adapts to the opposite direction under the torsional force of the input torsion spring 32 and always remains in contact with the ground.

[0025] When not in use, the cutter height sensor can be adjusted to the retracted state. The sensor body 3 can be manually moved so that the sensor body 3 and the grounding arm 4 rotate together around the pivot 2. When the grounding arm 4 rotates toward the fixed plate 11 and touches the fixed plate 11, the sensor body 3 can be released. The stored force-applying torsion spring 21 indirectly applies force to the grounding arm 4, so that the grounding arm 4 is only against the side of the fixed plate 11. This allows the sensor body 3 and the grounding arm 4 to stop in the retracted space, thus protecting the equipment in non-operational or high-risk scenarios and improving the overall performance and lifespan.

[0026] When needed, apply force to the grounding arm 4 and press it down. The sensor body 3 can switch from the "folded" state to the "working" state under the torsional force of the input torsion spring 32.

[0027] By adopting the above method, the header can automatically rise and fall to the same height above the ground according to the undulation of the ground during operation, keeping the stubble height consistent. This prevents the divider from inserting into the ground and causing soil to be transported, which could lead to blockages and damage to the header. There is no need to frequently operate the header lifting rod to adjust the header height, thus achieving automatic control of the header height and ensuring safe driving at high speeds. At the same time, the grounding arm 4 of the sensor can be retracted for storage when necessary.

[0028] The fixing plate 11 and the support arm 12 are integrally formed bent parts.

[0029] It should be noted that sensor body 3 is an angle sensor body. When the grounding arm 4 passes the protruding point and remains in contact with the ground after reversing, the cutting table stops rising to ensure the cutting height. When the grounding arm 4 passes the protruding point and is suspended from the ground after reversing, the cutting table automatically descends until the grounding arm 4 touches the ground, at which point the cutting table stops descending. The grounding arm 4 is considered to be in contact with the ground when the angle value measured by sensor body 3 is greater than 0°.

[0030] In addition, as a conventional technical means in this field, the raising and lowering of the harvester's header can be controlled by a joystick. During operation, in the "on" mode of automatic header height control, manually operating the header raising and lowering joystick to adjust the header's height above the ground takes precedence over automatic header height control.

[0031] It should be noted that the working principle and communication method of the sensor body 3 and the harvester's control terminal are commonplace, and are all conventional means or common knowledge. They will not be elaborated here. Those skilled in the art can make arbitrary settings according to their needs or convenience.

[0032] Based on the above embodiments, the rotating shaft 2 includes a shaft fixedly connected to the support arm 12 at one end and a screw threaded to the other end of the shaft. The shaft passes through the sensor cover 5 and the sensor body 3.

[0033] Example 2 like Figure 7 and Figure 8 Based on Embodiment 1, the cutting table height sensor of this utility model also includes a sensor cover 5 rotatably mounted on the rotating shaft 2, a sensor body 3 fixedly mounted inside the sensor cover 5, and one end of the force-applying torsion spring 21 fixedly connected to the sensor cover 5.

[0034] The advantage of adopting the preferred solution in the above embodiments is that the sensor body 3 is protected by the sensor cover 5.

[0035] The sensor cover 5 opens in a direction away from the support arm 12 to accommodate and install the sensor body 3.

[0036] Example 3 like Figure 3 , Figure 7 as well as Figure 8 Based on embodiments 1 and 2, the sensor cover 5 is detachably connected to a limiting screw 51, which overlaps the upper side of the support arm 12.

[0037] The beneficial effect of adopting the preferred solution in the above embodiments is that when the sensor body 3 and the grounding arm 4 are subjected to force to switch from the "closed" state to the "working" state, the limiting screw 51 rotates toward the fixing plate 11 and overlaps the upper side of the support arm 12, thereby limiting the initial ground contact height of the grounding arm 4.

[0038] In this embodiment, an arc groove is provided on the support arm 12 for the limit screw 51 to overlap.

[0039] Example 4 like Figure 3 and Figure 4 Based on embodiments 1-3, the support arm 12 is fixedly connected to a limiting rod 121, the limiting rod 121 is parallel to the rotating shaft 2, and the limiting rod 121 and the rotating shaft 2 are simultaneously clamped at one end of the force-applying torsion spring 21; the sensor cover 5 is fixedly connected to a positioning rod 52, the positioning rod 52 is parallel to the rotating shaft 2, and the positioning rod 52 and the rotating shaft 2 are simultaneously clamped at the other end of the force-applying torsion spring 21.

[0040] The advantage of adopting the preferred solution in the above embodiments is that the force-applying torsion spring 21 is fastened by the combined action of the rotating shaft 2, the limiting rod 121 and the positioning rod 52.

[0041] Example 5 like Figure 3 and Figure 4 Based on embodiments 1-4, the sensor cover 5 is fixedly connected to a protective cylinder 53, the positioning rod 52, the rotating shaft 2 and the force-applying torsion spring 21 are all located inside the protective cylinder 53, and the protective cylinder 53 abuts against the support arm 12.

[0042] The advantage of adopting the preferred solution in the above embodiments is that the positioning rod 52, the rotating shaft 2 and the torsion spring 21 are protected by the protective cylinder 53.

[0043] The positioning rod 52, the protective cylinder 53, and the sensor cover 5 are integrally formed.

[0044] Example 6 like Figures 1-4Based on embodiments 1-5, the support body 1 further includes a rod 13 and a fastening screw 14. One end of the rod 13 is fixedly connected to the fixing plate 11, and the other end is used to insert into the sleeve 61 of the divider 6. The fastening screw 14 is used to be threadedly connected to the sleeve 61 of the divider 6 and abuts against the side wall of the rod 13.

[0045] The advantage of adopting the preferred solution in the above embodiments is that the height sensor is stably installed on the divider 6 by tightening the fastening screw 14, and the insertion rod 13 is inserted into the sleeve 61, so as to quickly realize the assembly and disassembly.

[0046] Example 7 like Figures 1-4 Based on embodiments 1-6, the support body 1 further includes an anti-rotation torsion spring 15 and an anti-rotation pin 16. The anti-rotation torsion spring 15 is used to be sleeved on the sleeve 61 of the divider 6. One end of the anti-rotation pin 16 is fixedly connected to the fixing plate 11, and the other end is inserted between the two free ends of the anti-rotation torsion spring 15. The two free ends of the anti-rotation torsion spring 15 respectively abut against the opposite sides of the anti-rotation pin 16.

[0047] The beneficial effect of adopting the preferred solution in the above embodiments is that after the plug rod 13 is inserted into the sleeve 61 and the fastening screw 14 is tightened, the plug rod 13 can be prevented from coming out of the sleeve 61. At the same time, the two free ends of the anti-rotation torsion spring 15 are connected to the anti-rotation pin 16. Through the torsional force of the anti-rotation torsion spring 15, the grounding arm 4 is always in contact with the ground and will not deflect with the plug rod 13 as the central axis.

[0048] Example 8 like Figures 1-9 Based on embodiments 1-7, the grounding arm 4 includes a connecting plate 41 fixedly connected to the input shaft 31, an adapter plate 42 fixedly connected to the connecting plate 41 at one end, and a grounding plate 43 fixedly connected to the adapter plate 42 at one end and touching the ground at the other end. The other end of the adapter plate 42 extends laterally into the retractable space.

[0049] The beneficial effect of adopting the preferred solution in the above embodiments is that, through the conversion of the adapter plate 42, the rotation circumference of the contact plate 43 passes through the retracting space, so that the other end of the contact plate 43 in the retracted state can abut against the fixing plate 11.

[0050] In this embodiment, the connecting plate 41, the adapter plate 42, and the contact plate 43 are integrally formed bent parts.

[0051] Example 9 like Figure 4 and Figure 5Based on embodiments 1-8, the other end of the adapter plate 42 extends laterally to the side wall of the sensor body 3, and the sensor body 3 is fixedly connected to the limiting stage 33, which is located on the rotation path of the adapter plate 42 with the input shaft 31 as the rotation axis.

[0052] The beneficial effect of adopting the preferred solution in the above embodiments is that, in the "folded" state, when the other end of the grounding plate 43 abuts against the fixed plate 11, when the grounding arm 4 is subjected to a reaction force and undergoes a slight rotational movement about the input shaft 31 as the central axis, the limiting platform 33 can form a rotational limit on the adapter plate 42, ensuring the stability of the sensor in the "folded" state.

[0053] When the harvester reverses and forgets to "fold up" the sensor, the grounding arm 4 rotates due to the obstruction of the raised ground. The limiting platform 33 can also limit the rotation of the adapter plate 42 to prevent the grounding arm 4 from rotating excessively and causing damage to the sensor body 3.

[0054] Example 10 like Figure 10 The present invention also provides a semi-feeding combine harvester, including at least one header height sensor as described in Examples 1-9, and also includes a header frame 7 and a plurality of dividers 6 mounted on the header frame 7, wherein a header height sensor is mounted on the belly of at least one divider 6.

[0055] By adopting the aforementioned semi-feeding combine harvester and configuring a header height contouring function, the header can be raised and lowered according to the undulations of the ground during operation, keeping the header height at the same level and ensuring consistent stubble height.

[0056] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cutting table height sensor, comprising a sensor body (3) and a grounding arm (4), wherein the sensor body (3) is rotatably connected to an input shaft (31), the input shaft (31) is fitted with an input torsion spring (32), the two ends of the input torsion spring (32) are respectively fixedly connected to the sensor body (3) and the grounding arm (4), and one end of the grounding arm (4) is fixedly connected to the input shaft (31), characterized in that, It also includes a support body (1), which includes a fixing plate (11) for detachably connecting to the belly of the divider (6) and a support arm (12) fixedly connected to one end of the fixing plate (11). The other end of the support arm (12) is fixedly connected to a rotating shaft (2) for rotatably mounting the sensor body (3). The rotating shaft (2) is fitted with a torsion spring (21). The two ends of the torsion spring (21) are fixedly connected to the support arm (12) and the sensor body (3) respectively. A folding space is formed between the rotating shaft (2) and the fixing plate (11) for the sensor body (3) and the grounding arm (4) to rotate simultaneously. The fixing plate (11) is located on the rotation path at the other end of the grounding arm (4).

2. The cutting table height sensor according to claim 1, characterized in that, It also includes a sensor cover (5) rotatably mounted on the rotating shaft (2), the sensor body (3) is fixedly mounted inside the sensor cover (5), and one end of the force-applying torsion spring (21) is fixedly connected to the sensor cover (5).

3. The cutting table height sensor according to claim 2, characterized in that, The sensor cover (5) is detachably connected to a limiting screw (51), which overlaps the upper side of the support arm (12).

4. The cutting table height sensor according to claim 2, characterized in that, The support arm (12) is fixedly connected to a limiting rod (121), the limiting rod (121) is parallel to the rotating shaft (2), and the limiting rod (121) and the rotating shaft (2) are simultaneously clamped at one end of the force-applying torsion spring (21); the sensor cover (5) is fixedly connected to a positioning rod (52), the positioning rod (52) is parallel to the rotating shaft (2), and the positioning rod (52) and the rotating shaft (2) are simultaneously clamped at the other end of the force-applying torsion spring (21).

5. A cutting table height sensor according to claim 4, characterized in that, The sensor cover (5) is fixedly connected to a protective cylinder (53). The positioning rod (52), the rotating shaft (2) and the force-applying torsion spring (21) are all located inside the protective cylinder (53), and the protective cylinder (53) abuts against the support arm (12).

6. The cutting table height sensor according to claim 1, characterized in that, The support body (1) also includes a rod (13) and a fastening screw (14). One end of the rod (13) is fixedly connected to the fixing plate (11), and the other end is used to insert into the sleeve (61) of the divider (6). The fastening screw (14) is used to be threaded to the sleeve (61) of the divider (6) and abuts against the side wall of the rod (13).

7. A cutting table height sensor according to claim 6, characterized in that, The support body (1) also includes an anti-rotation torsion spring (15) and an anti-rotation pin (16). The anti-rotation torsion spring (15) is used to be sleeved on the sleeve (61) of the divider (6). One end of the anti-rotation pin (16) is fixedly connected to the fixing plate (11), and the other end is inserted between the two free ends of the anti-rotation torsion spring (15). The two free ends of the anti-rotation torsion spring (15) respectively abut against the opposite sides of the anti-rotation pin (16).

8. A cutting table height sensor according to any one of claims 1-7, characterized in that, The grounding arm (4) includes a connecting plate (41) fixedly connected to the input shaft (31), a transition plate (42) fixedly connected to the connecting plate (41) at one end, and a grounding plate (43) fixedly connected to the transition plate (42) at one end and the other end of the transition plate (42) touching the ground. The other end of the transition plate (42) extends laterally into the retractable space.

9. A cutting table height sensor according to claim 8, characterized in that, The other end of the adapter plate (42) extends laterally to the side wall of the sensor body (3), and the sensor body (3) is fixedly connected to the limiting stage (33), which is located on the rotation path of the adapter plate (42) with the input shaft (31) as the rotation axis.

10. A semi-feeding combine harvester, characterized in that, Includes at least one cutting table height sensor as described in any one of claims 1-9.

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