Displacement monitoring device and working machine

Abstract

The invention discloses a displacement monitoring device and an operation machine, the displacement monitoring device comprises a guide plate, a detection assembly and a controller, the guide plate is arranged on a fixed part and is provided with a guide groove, the guide groove extends along the length direction of the fixed part, and the guide groove is obliquely arranged along the width direction of the fixed part; the detection assembly comprises a sliding pin and an angle sensor, the sliding pin is slidably arranged in the guide groove, the angle sensor is arranged on a sliding part, the sliding part is slidably arranged on the fixed part, and the angle sensor is in driving connection with the sliding pin and is used for detecting the rotation angle of the sliding pin; the controller is in communication connection with the angle sensor and is configured to determine the linear displacement of the sliding piece according to the rotation angle of the sliding pin, and the device has the advantages of being high in detection accuracy, convenient and rapid to install and small in occupied space.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of displacement detection, and particularly relates to a displacement monitoring device and a working machine. BACKGROUND

[0002] When crop harvesting is performed using a harvester, the front and rear positions of a pickup reel on a header need to be constantly adjusted according to the height and lodging of crops. However, the header is usually only equipped with an angle sensor for detecting the inclination angle of the header, and the working personnel cannot accurately determine the front and rear displacement of the pickup reel, thereby affecting the crop harvesting effect. In addition, due to the complex structure, large volume of the existing displacement sensor, the lack of sufficient installation space on the header, and the installation interference between the displacement sensor and the angle sensor or other components, the displacement sensor for detecting the displacement of the pickup reel cannot be directly installed on the header. SUMMARY

[0003] In view of the above defects or deficiencies, the present application provides a displacement monitoring device and a working machine, aiming to solve the technical problem that the front and rear displacement of the pickup reel cannot be accurately detected in the prior art.

[0004] In order to achieve the above-mentioned purpose, the present application provides a displacement monitoring device, which comprises: A guide plate is provided on the fixed part and has a guide groove, the guide groove extends along the length direction of the fixed part, and the guide groove is inclined along the width direction of the fixed part; A detection assembly comprises a sliding pin and an angle sensor, the sliding pin is slidably arranged in the guide groove, the angle sensor is arranged on the sliding part, and the sliding part is slidably arranged on the fixed part, the angle sensor is drivingly connected with the sliding pin, and is used for detecting the rotation angle of the sliding pin; A controller is in communication connection with the angle sensor, and is configured to determine the linear displacement of the sliding part according to the rotation angle of the sliding pin.

[0005] In the embodiment of the present application, the detection assembly further comprises a swing link, one end of the swing link is hinged with the sliding pin, the other end of the swing link is connected with the angle sensor, so that the sliding pin is drivingly connected with the angle sensor through the swing link, and the swing angle of the swing link is equal to the rotation angle of the sliding pin, and the controller is configured to determine the linear displacement of the sliding part according to the swing angle of the swing link.

[0006] In the embodiment of the present application, the swing link comprises a rod body and a mounting block, one end of the rod body is hinged with the sliding pin, and the mounting block is arranged at the other end of the rod body, the mounting block is provided with a mounting hole, and the angle sensor is provided with a rotation detection shaft, the rotation detection shaft extends into the mounting hole and is connected with the mounting block.

[0007] In the embodiment of the present application, a limiting step is arranged on the rotating detection shaft, and an abutting boss is arranged on the hole wall of the mounting hole and abuts against the limiting step.

[0008] In the embodiment of the present application, the detection assembly further comprises a limiting ring and a limiting spring, the limiting ring and the limiting spring are sleeved on the sliding pin, a first clamping groove is arranged on the sliding pin, the limiting ring is arranged in the first clamping groove, one end of the limiting spring abuts against the limiting ring, and the other end of the limiting spring abuts against the rod body.

[0009] In the embodiment of the present application, the detection assembly further comprises a stop ring, the stop ring is sleeved on the sliding pin, and the stop ring is located on the side of the rod body away from the guide plate.

[0010] In the embodiment of the present application, the sliding member is provided with a mounting bracket, the angle sensor is arranged on the mounting bracket, and the rotating detection shaft passes through the mounting bracket and extends into the mounting hole.

[0011] In the embodiment of the present application, the mounting bracket comprises a connecting portion and a mounting portion, the connecting portion is connected with the sliding member, the mounting portion is connected with the connecting portion and is arranged to be bent relative to the connecting portion, and the angle sensor is arranged on the mounting portion.

[0012] In the embodiment of the present application, a connecting lug is arranged on the angle sensor, a connecting fastener is arranged on the connecting lug, and a connecting hole through which the connecting fastener passes is arranged on the mounting portion at a position corresponding to the connecting lug.

[0013] In order to achieve the above-mentioned purpose, the present application further provides a working machine, which comprises the displacement monitoring device according to the above.

[0014] Through the above technical solution, the displacement monitoring device and the working machine provided by the embodiment of the present application have the following advantages: In the technical solution of the present application, the sliding member can drive the angle sensor to move, so that the angle sensor drives the sliding pin to slide in the guide groove. Since the guide groove is arranged to be inclined, the sliding pin can rotate during the sliding process. The angle sensor can detect the rotation angle of the sliding pin and send it to the controller. The controller receives the detection result of the angle sensor, and then can determine the sliding distance of the sliding pin according to the rotation angle of the sliding pin. The sliding pin and the sliding member move synchronously to realize the determination of the linear displacement of the sliding member by detecting the rotation angle of the sliding pin. Without additional displacement sensors, the linear displacement of the sliding member can be accurately detected, and the device has the advantages of high detection accuracy, convenient and fast installation, and small occupied space.

[0015] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are included to provide a further understanding of embodiments of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain embodiments of the application. The drawings provided herein are for illustrative purposes only and, as such, do not limit the scope of the application. For the sake of brevity and clarity, explanations in the detailed description and examples that pertain to familiar or redundant aspects of the technology will typically be presented in a summary fashion. In the drawings and descriptions provided herein, like-numbers represent similar elements, unless indicated otherwise. Figure 1 is a structural schematic diagram of a displacement monitoring device, a fixing member and a sliding member according to an embodiment of the application; Figure 2 is a partial structural schematic diagram of a displacement monitoring device, a fixing member and a sliding member according to an embodiment of the application; Figure 3 is an exploded structural schematic diagram of a displacement monitoring device, a fixing member and a sliding member according to an embodiment of the application; Figure 4 is a structural schematic diagram of a displacement monitoring device according to an embodiment of the application; Figure 5 is a sectional structural schematic diagram of a displacement monitoring device according to an embodiment of the application; Figure 6 is an exploded structural schematic diagram of a displacement monitoring device according to an embodiment of the application; Figure 7 is a structural schematic diagram of a sliding pin and a swing link according to an embodiment of the application; Figure 8 is a structural schematic diagram of a swing link according to an embodiment of the application; Figure 9 is a structural schematic diagram of a mounting bracket according to an embodiment of the application.

[0017] BRIEF DESCRIPTION OF DRAWINGS DETAILED DESCRIPTION

[0018] Embodiments of the application will be described in detail with reference to the drawings, wherein like reference numerals refer to like elements throughout. It is to be understood that the detailed description of the embodiments provided herein is intended to be illustrative only and is not intended to be limiting as to the scope of the application.

[0019] A displacement monitoring device according to the application will be described below with reference to the drawings.

[0020] As Figures 1 to 5As shown, the displacement monitoring device provided by the present application comprises a guide plate 10, a detection assembly and a controller, the guide plate 10 is arranged on a fixed part 200 and is provided with a guide groove 11, the guide groove 11 is arranged along the length direction of the fixed part 200, and the guide groove 11 is arranged obliquely along the width direction of the fixed part 200; the detection assembly comprises a sliding pin 20 and an angle sensor 40, the sliding pin 20 is arranged slidably in the guide groove 11, the angle sensor 40 is arranged on a sliding part 300, and the sliding part 300 is arranged slidably on the fixed part 200, the angle sensor 40 is drivingly connected with the sliding pin 20 and is used for detecting the rotation angle of the sliding pin 20; the controller is communicatively connected with the angle sensor 40 and is configured to determine the linear displacement of the sliding part 300 according to the rotation angle of the sliding pin 20.

[0021] It should be noted that the displacement monitoring device of the present application can be used to detect the linear displacement of the sliding part 300 relative to the fixed part 200 in the case that the displacement sensor installation space is insufficient or installation interference, the structure shape, type, action and application equipment of the fixed part 200 and the sliding part 300 are not limited in the present application, as long as the sliding part 300 arranged slidably on the fixed part 200 can be used for linear displacement detection by the displacement monitoring device of the present application, and the present application is only used as an example of the displacement monitoring device applied to a harvester, wherein the harvester comprises a header device, the header device comprises a reel, a header mounting beam and a sliding seat, the fixed part 200 is arranged as the header mounting beam, the sliding part 300 is arranged as the sliding seat, the sliding part 300 is arranged slidably on the fixed part 200, the reel is connected with the sliding part 300 so that the sliding part 300 can drive the reel to slide forward and backward relative to the fixed part 200, and the displacement monitoring device of the present application is used for detecting the displacement of the reel and the sliding part 300.

[0022] Specifically, the guide plate 10 of the displacement monitoring device is arranged on the fixed part 200, the length direction of the fixed part 200 is the front-back direction as shown in Figure 3 , the width direction of the fixed part 200 is the up-down direction as shown in Figure 3 , the guide plate 10 is provided with the guide groove 11 arranged along the front-back direction, and the guide groove 11 is arranged obliquely from top to bottom along the front-back direction, the angle sensor 40 of the displacement monitoring device is arranged on the sliding part 300, so that the sliding part 300 can drive the angle sensor 40 to slide forward and backward along the fixed part 200, the sliding pin 20 is arranged on the angle sensor 40, the sliding pin 20 extends into the guide groove 11 and can slide along the guide groove 11.

[0023] When the sliding piece 300 drives the reel to move forward and backward, the sliding piece 300 synchronously drives the angle sensor 40 to drive the sliding pin 20 to slide in the guide groove 11, and the guide groove 11 is inclined to be arranged, so that the sliding pin 20 can rotate in the sliding process, the angle sensor 40 can detect the rotation angle of the sliding pin 20 and send it to the controller, the controller receives the detection result of the angle sensor 40, and then can determine the sliding distance of the sliding pin 20 according to the rotation angle of the sliding pin 20, the sliding pin 20, the sliding piece 300 and the reel move synchronously to realize the determination of the linear displacement of the sliding piece 300 and the reel through the detection of the rotation angle of the sliding pin 20, without additional displacement sensor, the linear displacement of the reel can be accurately detected, and the method has the advantages of high detection accuracy, convenient and fast installation and small occupied space.

[0024] It can be understood that the angle sensor 40 can adopt an angle sensor for detecting the inclination angle in the header device, so that an angle sensor does not need to be additionally arranged on the sliding piece 300, the cost is further reduced, the assembly step is simplified, and the installation efficiency is improved; in addition, since the guide groove 11 is inclined to be arranged, the sliding pin 20 has displacement in the front-back direction and displacement in the up-down direction when sliding, so that the sliding pin 20 can drive the detection shaft of the angle sensor 40 to rotate when the sliding pin 20 is displaced in the up-down direction, the rotation angle of the sliding pin 20 is detected by the angle sensor 40, and the displacement of the reel is determined through the rotation angle, and it needs to be noted that the linear displacement can be determined according to the rotation angle by using the prior art, for example, the linear displacement of the sliding piece 300 is determined according to the angle-displacement mapping table, the angle-displacement conversion formula and the like, since the method for determining the linear displacement according to the rotation angle is well known to those skilled in the art and does not belong to the core improvement part of the application, and thus will not be described here.

[0025] In the embodiment of the application, the detection assembly further comprises a swing link 30, one end of the swing link 30 is hinged to the sliding pin 20, and the other end of the swing link 30 is connected to the angle sensor 40, so that the sliding pin 20 is drivingly connected to the angle sensor 40 through the swing link 30, and the swing angle of the swing link 30 is equal to the rotation angle of the sliding pin 20, and the controller is configured to determine the rotation angle of the sliding pin 20 according to the swing angle of the swing link 30, and determine the linear displacement of the sliding piece 300 according to the rotation angle of the sliding pin 20.

[0026] As Figures 1 to 5As shown, the angle sensor 40 is provided with a swing linkage 30, and the end of the swing linkage 30 away from the angle sensor 40 is provided with a sliding pin 20. The sliding pin 20 extends into the guide groove 11 and can slide along the guide groove 11. When the sliding component 300 drives the reel to move back and forth, the sliding component 300 synchronously drives the angle sensor 40 so that the angle sensor 40 drives the sliding pin 20 to slide in the guide groove 11 through the swing linkage 30. Since the guide groove 11 is inclined, the sliding pin 20 can drive the swing linkage 30 to swing during the sliding process. The angle sensor 40 can detect the swing angle of the swing linkage 30 and send it to the controller. The controller receives the detection result of the angle sensor 40 and can then determine the sliding distance of the sliding pin 20 based on the swing angle of the swing linkage 30. The sliding pin 20, the sliding component 300 and the reel move synchronously to realize the determination of the linear displacement of the sliding component 300 and the reel by detecting the swing angle of the swing linkage 30. The linear displacement of the reel can be accurately detected without the need for an additional displacement sensor. It has the advantages of high detection accuracy, convenient and quick installation and small space occupation.

[0027] Understandably, because the guide groove 11 is inclined, the sliding pin 20 has both forward and backward displacement and up and down displacement when sliding. This allows the sliding pin 20 to drive the swing linkage 30 to swing when it moves up and down, so that the angle sensor 40 can detect the swing angle of the swing linkage 30 and determine the displacement of the reel by the swing angle. It should be noted that the linear displacement can be determined by existing technology, such as by using an angle-displacement mapping table or an angle-displacement conversion formula. Since the method of determining the linear displacement by the swing angle is well known to those skilled in the art and is not part of the core improvement of this application, it will not be described in detail here.

[0028] In this embodiment of the invention, the swing linkage 30 includes a rod body 31 and a mounting block 32. One end of the rod body 31 is hinged to the sliding pin 20, and the mounting block 32 is located at the other end of the rod body 31. The mounting block 32 has a mounting hole 321. The angle sensor 40 has a rotation detection shaft 41, which extends into the mounting hole 321 and is connected to the mounting block 32.

[0029] like Figures 6 to 8 As shown, the sliding pin 20 slides along the guide groove 11 to drive the rod body 31 to rotate. The rod body 31 drives the mounting block 32 and the rotation detection shaft 41 to rotate, so that the angle sensor 40 can accurately detect the swing angle of the rod body 31 through the rotation angle of the rotation detection shaft 41. The rotation detection shaft 41 is installed in the mounting hole 321 and can rotate synchronously with the mounting block 32, which improves the accuracy of displacement detection.

[0030] Furthermore, a limiting step 411 is provided on the rotating detection shaft 41, and an abutment boss 3211 is provided on the wall of the mounting hole 321, and the abutment boss 3211 abuts against the limiting step 411. Figure 6 and Figure 8 As shown, the limiting step 411 on the rotating detection shaft 41 is used to abut against the abutting boss 3211 in the mounting hole 321. It can both position and install the swing linkage 30, and limit the rotating detection shaft 41 to ensure that the rotating detection shaft 41 rotates synchronously with the mounting block 32, thereby further improving the accuracy of displacement detection.

[0031] In this embodiment of the invention, the detection component further includes a limiting retaining ring 21 and a limiting spring 22. The limiting retaining ring 21 and the limiting spring 22 are both sleeved on the sliding pin 20. The sliding pin 20 has a first retaining groove 23. The limiting retaining ring 21 is disposed in the first retaining groove 23. One end of the limiting spring 22 abuts against the limiting retaining ring 21, and the other end of the limiting spring 22 abuts against the rod body 31.

[0032] like Figures 3 to 7 As shown, the two ends of the limiting spring 22 abut against the rod body 31 and the limiting ring 21 respectively, and the limiting ring 21 is installed in the first groove 23. The elastic force of the limiting spring 22 acts on the limiting ring 21, thereby pushing the limiting ring 21 to move towards the guide plate 10. The limiting ring 21 drives the sliding pin 20 to move towards the guide plate 10, so that the sliding pin 20 extends into the guide groove 11 and can slide along the guide groove 11, effectively preventing the sliding pin 20 from dislodging from the guide groove 11, and ensuring stable and reliable sliding.

[0033] In embodiments of the present invention, such as Figures 3 to 7 As shown, the detection assembly also includes a stop ring 24, which is sleeved on the sliding pin 20 and located on the side of the rod body 31 facing away from the guide plate 10. The stop ring 24 is used to abut against the rod body 31 to limit the sliding pin 20 and prevent the sliding pin 20 from falling off the rod body 31. The structure is stable and reliable. Furthermore, the sliding pin 20 has a second slot 25, which is spaced apart from the first slot 23. The second slot 25 is used for installing the stop ring 24, which effectively prevents the stop ring 24 from falling off and further improves the structural stability.

[0034] In embodiments of the present invention, such as Figure 4 and Figure 9As shown, the sliding component 300 is provided with a mounting bracket 50, and the angle sensor 40 is mounted on the mounting bracket 50. The rotation detection shaft 41 passes through the mounting bracket 50 and extends into the mounting hole 321. The mounting bracket 50 is used for mounting the angle sensor 40, so that the rotation detection shaft 41 of the angle sensor 40 can extend into and be installed into the mounting hole 321, which improves the ease of assembly. The structure is compact and occupies little space, realizing the detection of tilt angle and linear displacement of the reel by a single angle sensor 40.

[0035] Furthermore, the mounting bracket 50 includes a connecting part 51 and a mounting part 52. The connecting part 51 is connected to the sliding member 300, and the mounting part 52 is connected to the connecting part 51 and bent relative to the connecting part 51. An angle sensor 40 is disposed on the mounting part 52. In addition, the angle sensor 40 is provided with a connecting ear 42, and a connecting fastener 421 passes through the connecting ear 42. The mounting part 52 is provided with a connecting hole 521 at the position corresponding to the connecting ear 42 for the connecting fastener 421 to pass through.

[0036] like Figure 4 and Figure 9 As shown, the connecting part 51 is bent relative to the mounting part 52 to facilitate the mounting of the connecting part 51 on the sliding member 300, which improves the ease of installation. The mounting part 52 is used for the rotation detection shaft 41 of the angle sensor 40 to pass through to stably support the angle sensor 40, which improves the structural reliability. Furthermore, the angle sensor 40 is provided with a connecting ear 42, and the mounting part 52 is provided with a connecting hole 321. The connecting fastener 421 passes through the connecting ear 42 and the mounting hole 321 to connect the angle sensor 40 to the mounting part 52, which makes the installation convenient and quick, and the structure stable and reliable.

[0037] In this embodiment of the invention, the sliding member 300 is provided with an arc-shaped relief groove 301, and the sliding pin 20 passes through the arc-shaped relief groove 301 and extends into the guide groove 11. Figures 1 to 3 As shown, the sliding member 300 has an arc-shaped clearance groove 301 that communicates with the guide groove 11. The arc-shaped clearance groove 301 is used for the sliding pin 20 to pass through so that the sliding pin 20 can extend into the guide groove 11. The arc-shaped clearance groove 301 is set in an arc shape to avoid the sliding pin 20, effectively preventing sliding interference to the sliding pin 20. The structure is reasonably designed, and the setting of the sliding pin 20 passing through the sliding member 300 improves the structural compactness and further reduces the space occupied.

[0038] In addition, the present invention also provides a working machine, which includes the displacement monitoring device according to the above description. The specific structure of the displacement monitoring device is as described in the above embodiments. Since the working machine adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0039] Furthermore, the operating machinery is configured as a harvester, which includes a header assembly. The header assembly includes a reel, a header mounting beam, and a sliding seat. The fixing component 200 is configured as the header mounting beam, and the sliding component 300 is configured as the sliding seat. The reel is connected to the sliding component 300, and the fixing component 200 is used to connect to the header body. When the sliding component 300 drives the reel to move back and forth, the sliding component 300 synchronously drives the angle sensor 40 so that the angle sensor 40 drives the sliding pin 20 to slide within the guide groove 11. Because the guide groove 11 is inclined, the sliding pin 20 can slide within the guide groove 11. During the movement, the angle sensor 40 can detect the rotation angle of the sliding pin 20 and send it to the controller. The controller receives the detection result from the angle sensor 40 and can then determine the sliding distance of the sliding pin 20 based on the rotation angle of the sliding pin 20. The sliding pin 20, the sliding component 300 and the reel move synchronously to realize the determination of the linear displacement of the sliding component 300 and the reel by detecting the rotation angle of the sliding pin 20. The linear displacement of the reel can be accurately detected without the need for an additional displacement sensor. It has the advantages of high detection accuracy, convenient and quick installation and small space occupation.

[0040] In the description of this invention, it should be understood that 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 invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a connection that allows communication between them; 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 invention according to the specific circumstances.

[0042] 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.

[0043] 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 displacement monitoring device, characterized in that, The displacement monitoring device includes: A guide plate (10) is provided on the fixing member (200) and has a guide groove (11). The guide groove (11) extends along the length direction of the fixing member (200) and is inclined along the width direction of the fixing member (200). The detection component includes a sliding pin (20) and an angle sensor (40). The sliding pin (20) is slidably disposed in the guide groove (11), and the angle sensor (40) is disposed on a sliding member (300). The sliding member (300) is slidably disposed on the fixing member (200). The angle sensor (40) is drivenly connected to the sliding pin (20) and is used to detect the rotation angle of the sliding pin (20). The controller is communicatively connected to the angle sensor (40) and is configured to determine the linear displacement of the sliding member (300) based on the rotation angle of the sliding pin (20).

2. The displacement monitoring device according to claim 1, characterized in that, The detection assembly further includes a swing link (30), one end of which is hinged to the sliding pin (20), and the other end of which is connected to the angle sensor (40) so that the sliding pin (20) is driven to connect to the angle sensor (40) through the swing link (30), and the swing angle of the swing link (30) is equal to the rotation angle of the sliding pin (20). The controller is configured to determine the linear displacement of the sliding member (300) based on the swing angle of the swing link (30).

3. The displacement monitoring device according to claim 2, characterized in that, The swing linkage (30) includes a rod body (31) and a mounting block (32). One end of the rod body (31) is hinged to the sliding pin (20). The mounting block (32) is located at the other end of the rod body (31). The mounting block (32) has a mounting hole (321). The angle sensor (40) has a rotation detection shaft (41). The rotation detection shaft (41) extends into the mounting hole (321) and is connected to the mounting block (32).

4. The displacement monitoring device according to claim 3, characterized in that, A limiting step (411) is provided on the rotation detection shaft (41), and an abutting boss (3211) is provided on the wall of the mounting hole (321), and the abutting boss (3211) abuts against the limiting step (411).

5. The displacement monitoring device according to claim 3, characterized in that, The detection component also includes a limiting ring (21) and a limiting spring (22). The limiting ring (21) and the limiting spring (22) are both sleeved on the sliding pin (20). The sliding pin (20) has a first slot (23). The limiting ring (21) is located in the first slot (23). One end of the limiting spring (22) abuts against the limiting ring (21), and the other end of the limiting spring (22) abuts against the rod body (31).

6. The displacement monitoring device according to claim 3, characterized in that, The detection component also includes a stop ring (24), which is sleeved on the sliding pin (20) and is located on the side of the rod body (31) facing away from the guide plate (10).

7. The displacement monitoring device according to claim 3, characterized in that, The sliding member (300) is provided with a mounting bracket (50), the angle sensor (40) is provided on the mounting bracket (50), and the rotation detection shaft (41) passes through the mounting bracket (50) and extends into the mounting hole (321).

8. The displacement monitoring device according to claim 7, characterized in that, The mounting bracket (50) includes a connecting part (51) and a mounting part (52). The connecting part (51) is connected to the sliding member (300). The mounting part (52) is connected to the connecting part (51) and is bent relative to the connecting part (51). The angle sensor (40) is mounted on the mounting part (52).

9. The displacement monitoring device according to claim 8, characterized in that, The angle sensor (40) is provided with a connecting ear (42), and a connecting fastener (421) is provided on the connecting ear (42). The mounting part (52) is provided with a connecting hole (521) corresponding to the position of the connecting ear (42) for the connecting fastener (421) to pass through.

10. A type of operating machinery, characterized in that, The operating machinery includes a displacement monitoring device according to any one of claims 1 to 9.

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