Spray boom frame joint scraping prevention device and boom sprayer
The design of the anti-scratching joint device on the boom mount solves the problem of inconvenient spring force adjustment, realizes automatic avoidance and precise buffering of the boom mount, and improves the adaptability and ease of operation of the boom sprayer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-03-10
AI Technical Summary
The spring force adjustment of the springs in existing boom sprayers is inconvenient, making it difficult for the boom frame to quickly and accurately adjust the buffer force when encountering obstacles, which easily leads to hard scratches.
The spray boom frame adopts an anti-scratching joint device. Through the design of the connecting parts and springs, the sleeve part can be rotated relative to each other under the action of external force, changing the height of the spray boom frame. The spring force can be adjusted by the threaded section and nut, realizing continuous change and fine adjustment of the spring force.
It enables the spray boom frame to automatically adjust and recover when encountering obstacles, reducing hard collisions, improving the equipment's adaptability and ease of operation, protecting the structural integrity of the spray boom frame, and precisely adjusting the buffer force according to different environments.
Smart Images
Figure CN223979342U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of agricultural equipment, in particular to a spray boom frame anti-scratch device and a spray boom sprayer. BACKGROUND
[0002] With the continuous development of agricultural automation, crop pesticide spraying also gradually adopts mechanized spraying. The existing spray boom sprayer usually has multiple spray boom frames to achieve large-area spraying. The spray boom sprayer can expand and fold under the drive of a hydraulic cylinder or an electric drive. In order to avoid the hard scratch of the spray boom frame when it encounters an obstacle that cannot be passed, the prior art such as the utility model patent CN218604732U discloses a scratch-proof folding spray boom structure and a spray boom sprayer with the same, which comprises an intermediate spray boom frame, a spray boom mechanism, and a drive mechanism. A locking spring is installed at the connection between the push-pull oil cylinder and the intermediate spray boom frame. A buffer spring is installed at the connection between the intermediate pull rod and the second spray boom assembly. The connection between the first spray boom assembly and the second spray boom assembly has a spring assembly. The first spray boom assembly and the second spray boom assembly are connected through the spring assembly with a circular arc surface contact. When an obstacle is encountered, the circular arc surface can be used for gap adjustment. The compression of the spring assembly can play a buffering role. However, the two ends of the spring directly contact the first spray boom assembly and the second spray boom assembly. When it is necessary to adjust the spring force of the spring, only the spring with different spring force coefficients can be replaced to achieve this. This means that multiple specifications of springs need to be reserved to cope with different working environments and requirements. If the operator wants to adjust the buffer force, the old spring must be disassembled and a new spring must be installed. This process is relatively complex and time-consuming, which is not conducive to quick adjustment. SUMMARY
[0003] The utility model wants to achieve the purpose of providing a spray boom frame anti-scratch device, which solves the problem of inconvenient spring force adjustment of the spring in the prior art, making the spring force adjustment of the spring more convenient.
[0004] In order to achieve the above object, the utility model discloses the following technical scheme: spray pole frame anti-scratch joint device, including connecting shaft and two for connecting adjacent spray pole frame respectively connecting piece, the connecting piece includes the sleeve joint of sliding sleeve in the connecting shaft, the connecting shaft is equipped with the support part of supporting the sleeve joint, the connecting shaft is equipped with the threaded section still, the spring and the nut are sleeved in the end of the connecting shaft away from the support part, the nut and threaded section are threadedly connected, and the both ends of the spring are respectively with the nut and one of sleeve joint abuts, so that the sleeve joint of two is abutted under the action of spring, one of two sleeve joint is equipped with the first cooperation face, and the other is equipped with the second cooperation face and the first cooperation face abuts, the connecting piece is relative connecting shaft circumferential rotation to make the first cooperation face and the second cooperation face relative rotation under the action of external force, and the relative rotation of the first cooperation face and the second cooperation face forces one of two sleeve joint to produce axial movement to change the height of the connected spray pole frame, and the connecting piece has the tendency of keeping the initial contact position under the elastic force of the spring.
[0005] After adopting the above technical scheme, the utility model has the following advantages: the device is provided with a spring, when the spray pole frame encounters an obstacle, the spring can absorb and buffer external force by compression deformation, reduce the direct impact on the spray pole frame, thereby effectively avoiding the hard collision of the spray pole frame with the obstacle and causing scratches, protecting the integrity of the spray pole frame structure and the normal work of the sprayer, the first cooperation face and the second cooperation face of two connecting pieces can rotate relative when subjected to external force, thereby forcing the sleeve joint to produce axial movement to change the height of the spray pole frame, enabling the spray pole frame to automatically adjust the position according to the situation of the obstacle, avoiding the obstacle, more effectively avoiding the hard scratches of the spray pole frame with the obstacle, the connecting piece has the tendency of keeping the initial contact position under the elastic force of the spring, in the absence of external force, two connecting pieces can keep the initial contact position, provide stable support, and automatically return to the original position after the obstacle is removed, improve the self-adaptive ability and operation convenience of the equipment, secondly, by setting the threaded section and the nut, the rotation operation of the nut can be directly performed to adjust the pressure of the spring, more easily adjust to adapt to different working environments and requirements without replacing the spring, and the spring compression amount can also be adjusted by the nut, which can also realize the continuous change of the spring force instead of step adjustment, which can more accurately adjust the spring force according to the actual obstacle situation and the required buffer force, so that the spray pole frame can be better protected when encountering different degrees of collision.
[0006] Furthermore, one of the sleeve portions is provided with a cylindrical swing sleeve, and the other sleeve portion is provided with a groove. The first mating surface includes the cylindrical surface of the swing sleeve, and the second mating surface includes arc-shaped surfaces or inclined surfaces located on both sides of the groove. When the connector is in the initial contact position, the swing sleeve is located in the groove. When the connector is subjected to an external force, it rotates circumferentially relative to the connecting shaft to make the swing sleeve disengage from the groove along the second mating surface.
[0007] Using the aforementioned technical solution, when the equipment is in its initial state or when it does not encounter any obstacles, the swing sleeve is located in the groove, which provides a stable basic structure for the two connecting parts. Once an obstacle is encountered, the external force applied to the spray boom frame will cause the connecting parts to rotate relative to each other, causing the swing sleeve to disengage from the groove along the second mating surface. This process not only buffers external impacts but also forces the connecting sleeve to move axially, thereby changing the height of the connected spray boom frame. This allows the spray boom frame to flexibly adjust its height according to factors such as actual terrain and crop growth, further enhancing the anti-scratch effect and better meeting the needs of different operations. Finally, the second mating surface adopts an arc or bevel design, which can ensure that the swing sleeve can disengage from the groove more smoothly when an obstacle is encountered.
[0008] Furthermore, when the connector is in the initial contact position, the swing sleeve is supported on the second mating surface and has a gap between it and the bottom surface of the groove.
[0009] By employing the aforementioned technical solution, a gap exists between the swing sleeve and the bottom surface of the groove, avoiding direct contact between the two in the initial position, thereby significantly reducing frictional losses that may occur during relative motion. When the connecting parts rotate relative to each other, the swing sleeve mainly contacts and slides relative to the second mating surface. Compared to sliding with a large area of contact with the bottom surface of the groove, the frictional force is significantly reduced, which is beneficial to improving the transmission efficiency of the device and reducing energy loss.
[0010] Furthermore, both sides of the groove opening are provided with support surfaces for supporting the swing sleeve that is disengaged from the groove, and the support surfaces are connected to the second mating surface.
[0011] With the above technical solution, when the swing sleeve is disengaged from the groove along the second mating surface due to external force, the support surfaces on both sides can provide support points to ensure that the swing sleeve remains stable during movement as much as possible. The support surfaces on both sides can evenly distribute the load borne by the swing sleeve, making the force on the swing sleeve more balanced.
[0012] Furthermore, the supporting surface is a plane.
[0013] Through the above technical solution, since the connector may cause the swing sleeve to rotate forward or backward, the planar support surface provides the same support for the swing sleeve when the connector rotates forward or backward, ensuring that the swing sleeve maintains balance during the process of disengaging from the groove. Regardless of the direction the swing sleeve rotates with the connector, the contact method and support force between the planar support surface and the swing sleeve are relatively stable and consistent. An object on an inclined plane is subject to the component of gravity along the inclined plane. When the connector causes the swing sleeve to rotate downwards on the inclined plane, the component of gravity helps the swing sleeve slide or roll downwards, making rotation relatively easy. However, when rotating upwards on the inclined plane, it is necessary to overcome the component of gravity and friction, making rotation more difficult.
[0014] Furthermore, the swing sleeve is located above the groove and abuts against the spring.
[0015] By adopting the aforementioned technical solution, when the spray boom frame is subjected to an external impact, the swing sleeve located above can immediately sense the force. Since it is in direct contact with the spring, it can quickly transfer the force to the spring, causing the spring to compress rapidly and play a buffering role. This can effectively reduce the impact force on the spray boom frame and protect the spray boom frame and related equipment.
[0016] Furthermore, a limiting sleeve is also fitted on the connecting shaft. The limiting sleeve includes a pressing part located between the spring and the nut and a limiting part fitted on the outer ring of the spring.
[0017] Using the aforementioned technical solution, since the nut is usually small, the contact area between the nut and the spring is limited when adjusting the spring force, and the spring may become skewed or deviated. The spring needs a stable support surface to ensure its normal operation. The compression part can increase the contact area with the spring, making the force on the spring more uniform. By setting a limiting sleeve, the limiting part of the limiting sleeve is fitted on the outer ring of the spring, which can provide more precise positioning for the spring and ensure that the spring maintains a fixed position on the connecting shaft as much as possible, thereby preventing it from becoming skewed or deviated during operation and making the spring's operation more stable and reliable.
[0018] Furthermore, the connector also includes a positioning part and a connecting part. The connecting part is used to connect with the spray bar frame. The positioning part and the sleeve part are respectively connected to the two ends of the connecting part. The positioning part is sleeved on the connecting shaft. The nut is disposed between the sleeve part and the positioning part and is spaced apart from the sleeve part and the positioning part respectively.
[0019] By adopting the aforementioned technical solution, the connecting part is connected to the spray boom frame, providing a stable connection foundation for the spray boom frame and ensuring that the spray boom frame will not easily detach from other components during operation. Simultaneously, the positioning part is sleeved on the connecting shaft, further limiting the shaking of the connecting part on the connecting shaft and improving the connection stability of the spray boom frame. Furthermore, the nut is spaced apart from the sleeve and positioning parts, reducing direct contact and friction between the nut and the sleeve and positioning parts during the rotation of the connecting part, effectively reducing the possibility of the nut loosening.
[0020] Another objective of this utility model is to provide a boom sprayer, including a main unit and a plurality of boom frames connected in sequence on the main unit, wherein two adjacent boom frames are connected by a boom frame anti-scratch joint device as described in any of the above technical solutions.
[0021] Through the above technical solution, since the anti-scratching device of the spray boom frame can automatically adjust when it encounters an obstacle and return to its original position after the obstacle is removed, the spray boom sprayer can better adapt to different terrains and working environments, reducing the risk of hard collisions with the spray boom frame. Since the anti-scratching device of the spray boom frame is equipped with a threaded section and a nut, the pressure of the spring can be adjusted by directly rotating the nut, making it easier to adjust to different working environments and requirements.
[0022] Furthermore, the spray boom frame includes a front frame connected to the main unit and a rear frame away from the main unit. The front frame and the rear frame are connected by the spray boom frame anti-scratch joint device, and the included angle between the front frame and the spray boom frame anti-scratch joint device is 115°.
[0023] By using the above technical solution, the angle between the front frame and the anti-scratching joint device of the spray boom frame can be reasonably set, allowing the spray boom frame to adjust its posture more flexibly when facing different terrain conditions. Attached Figure Description
[0024] The present invention will be further described below with reference to the accompanying drawings:
[0025] Figure 1 This is a schematic diagram of the anti-scratching device for the spray boom frame in Embodiment 1 of this utility model;
[0026] Figure 2 This is a structural schematic diagram of the anti-scratching joint device for the spray boom frame from another perspective in Embodiment 1 of this utility model;
[0027] Figure 3 This is a cross-sectional view of the anti-scratching joint device of the spray bar frame in Embodiment 1 of this utility model;
[0028] Figure 4 This is an exploded view of the anti-scratching device for the spray boom frame in Embodiment 1 of this utility model;
[0029] Figure 5This is a schematic diagram of the limiting sleeve in Embodiment 1 of this utility model;
[0030] Figure 6 This is a schematic diagram of the boom sprayer in Embodiment 2 of this utility model;
[0031] Figure 7 For the present utility model Figure 6 Enlarged view of the structure at point A in the middle;
[0032] In the diagram, 10 is the connecting shaft; 11 is the support part; 12 is the threaded section; 20 is the connector; 21 is the sleeve part; 22 is the connecting part; 23 is the swing sleeve; 231 is the first mating surface; 24 is the groove; 241 is the second mating surface; 25 is the positioning part; 26 is the gap; 27 is the support surface; 28 is the limiting sleeve; 281 is the extrusion part; 282 is the limiting part; 29 is the through hole; 30 is the spring; 40 is the nut; 50 is the main unit; 60 is the spray bar frame; 61 is the front frame; and 62 is the rear frame. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.
[0034] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein.
[0035] It should be understood that in the various embodiments of this utility model, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this utility model.
[0036] It should be understood that in this invention, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.
[0037] It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.
[0038] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.
[0039] Example 1:
[0040] like Figures 1 to 5 As shown, this utility model provides a spray boom frame anti-scratch device, including a connecting shaft 10 and two connecting parts 20 for connecting adjacent spray boom frames 60 respectively. Each connecting part 20 includes a sleeve portion 21 slidably fitted onto the connecting shaft 10. The connecting shaft 10 is provided with a support portion 11 supporting the sleeve portion 21. The connecting shaft 10 also has a threaded section 12. A spring 30 and a nut 40 are fitted onto one end of the connecting shaft 10 away from the support portion 11. The nut 40 and the threaded section 12 are threadedly connected. The two ends of the spring 30 respectively abut against the nut 40 and one of the sleeve portions 21, so that the two sleeve portions 20... 1. Under the action of spring 30, the two sleeve parts 21 are abutted. One of them is provided with a first mating surface 231, and the other is provided with a second mating surface 241 that abuts against the first mating surface 231. The connecting member 20 is rotated circumferentially relative to the connecting shaft 10 under the action of external force, so that the first mating surface 231 and the second mating surface 241 rotate relative to each other. The relative rotation of the first mating surface 231 and the second mating surface 241 forces one of the two sleeve parts 21 to move axially to change the height of the connected spray boom frame 60. The connecting member 20 has a tendency to maintain the initial contact position under the elastic force of spring 30.
[0041] The device is equipped with a spring 30. When the boom mount 60 encounters an obstacle, the spring 30 can absorb and buffer the external force through compression deformation, reducing the direct impact on the boom mount 60. This effectively prevents the boom mount 60 from being scratched by a hard collision with the obstacle, protecting the structural integrity of the boom mount 60 and the normal operation of the sprayer. The first mating surface 231 and the second mating surface 241 of the two connecting parts 20 can rotate relative to each other when subjected to external force, thereby forcing the sleeve part 21 to move axially to change the height of the boom mount 60. This allows the boom mount 60 to automatically adjust its position according to the obstacle, thus avoiding the obstacle and more effectively preventing hard scratches between the boom mount 60 and the obstacle. The connecting parts 20 have a tendency to maintain their initial contact position under the elastic force of the spring 30. When in operation, the two connectors 20 can maintain their initial contact position, providing stable support, and automatically return to their original position after the obstacle is removed, improving the device's adaptability and ease of operation. Secondly, by setting the threaded section 12 and the nut 40, the pressure of the spring 30 can be adjusted directly by rotating the nut 40, making it easier to adjust to different working environments and requirements without replacing the spring 30. The compression of the spring 30 can also be adjusted by using the nut 40, which can achieve continuous change of spring force instead of stepped adjustment. This allows for more precise fine-tuning of the spring force according to the actual obstacle encountered and the required buffer force, so that the spray boom frame 60 can receive better buffer protection when encountering collisions of different degrees.
[0042] It should be noted that the boom mount 60 in this application refers to the boom mount 60 of the boom sprayer.
[0043] It should be noted that the external force acting on the connector 20 must be greater than the spring force exerted by the spring 30 on the connector 20 for the connector 20 to rotate.
[0044] To increase the structural strength of the connector 20, it also includes a positioning part 25 and a connecting part 22. The connecting part 22 is used to connect with the spray boom frame 60, providing a stable connection base for the spray boom frame 60 and ensuring that the spray boom frame 60 will not easily detach from other components during operation. Meanwhile, the positioning part 25 and the sleeve part 21 are respectively connected to the two ends of the connecting part 22. The positioning part 25 is sleeved on the connecting shaft 10, further limiting the shaking of the connector 20 on the connecting shaft 10 and improving the connection stability of the spray boom frame 60. Furthermore, the nut 40 and the sleeve part 21 are spaced apart, reducing direct contact and friction between the nut 40 and the sleeve part 21 during the rotation of the connector 20, effectively reducing the possibility of the nut 40 loosening.
[0045] Since the nut 40 is usually small, the contact area between the nut 40 and the spring 30 is limited when adjusting the spring force, and the spring 30 may become skewed or deviated. Therefore, in this application, a limiting sleeve 28 is also provided on the connecting shaft 10. The limiting sleeve 28 includes a pressing part 281 located between the spring 30 and the nut 40 and a limiting part 282 sleeved on the outer ring of the spring 30. The pressing part 281 can increase the contact area with the spring 30, making the force on the spring 30 more uniform. By setting the limiting sleeve 28, the limiting part 282 of the limiting sleeve 28 is sleeved on the outer ring of the spring 30, which can provide more precise positioning for the spring 30, and ensure that the spring 30 maintains a fixed position on the connecting shaft 10 as much as possible, thereby preventing it from becoming skewed or deviated during operation, and making the operation of the spring 30 more stable and reliable.
[0046] Because mechanical equipment often vibrates during operation, this vibration subjectes the nut 40 to periodic impact and shear forces. These forces gradually cause slight displacement and loosening of the threaded connection of the nut 40, resulting in a change in the spring force of the spring 30. Therefore, this application uses two nuts 40, which generate a certain interaction force. This interaction force increases the friction between the threads, and when subjected to external forces, the two nuts 40 restrain each other, making relative rotation difficult, thus effectively preventing the nuts 40 from loosening. In some cases, by initially tightening the first nut 40 to adjust the preload of the spring 30, and then using the second nut 40 for fine-tuning and locking, higher adjustment accuracy can be achieved.
[0047] One of the connecting parts 21 is provided with a cylindrical swing sleeve 23, and the other connecting part 21 is provided with a groove 24. The first mating surface 231 includes the cylindrical surface of the swing sleeve 23, and the second mating surface 241 includes arc-shaped surfaces located on both sides of the groove 24. When the connector 20 is in the initial contact position, the swing sleeve 23 is located in the groove 24, which provides a stable basic structure for the two connectors 20. Once an obstacle is encountered, the connector 20 is subjected to external force and rotates circumferentially relative to the connecting shaft 10 to make the swing sleeve 23 disengage from the groove 24 along the second mating surface 241. This process can not only buffer external impact, but also force the connecting sleeve to move axially, thereby changing the height of the connected spray boom 60. This allows the spray boom 60 to flexibly adjust its height according to factors such as actual terrain and crop growth, further enhancing the anti-scratch effect and better meeting different operations. Finally, the second mating surface 241 adopts an arc or inclined surface design to ensure that the swing sleeve 23 can disengage from the groove 24 more smoothly when encountering an obstacle.
[0048] To ensure a smoother disengagement of the swing sleeve 23 from the groove 24, when the connector 20 is in the initial contact position, the swing sleeve 23 is supported on the second mating surface 241 with a gap 26 between it and the bottom surface of the groove 24. This avoids direct contact between the two in the initial position, thereby significantly reducing frictional losses that may occur during relative motion. When the connector 20 rotates relative to the groove 24, the swing sleeve 23 mainly contacts and slides relative to the second mating surface 241. Compared to sliding with a large area of contact with the bottom surface of the groove 24, the frictional force is significantly reduced, which helps to improve the transmission efficiency of the device and reduce energy loss.
[0049] To make the connector 20 rotate more smoothly, both sides of the groove 24 are provided with support surfaces 27 for supporting the swing sleeve 23 that is disengaged from the groove 24. The support surfaces 27 are connected to the second mating surface 241. When the swing sleeve 23 is disengaged from the groove 24 along the second mating surface 241 due to external force, the support surfaces 27 on both sides can provide support points to ensure that the swing sleeve 23 remains stable during movement as much as possible. The support surfaces 27 on both sides can evenly distribute the load borne by the swing sleeve 23, making the force on the swing sleeve 23 more balanced.
[0050] Since the connector 20 can cause the swing sleeve 23 to rotate forward or backward, if the support surface 27 is an inclined plane, and an object on the inclined plane is subject to the component of gravity along the inclined plane, when the connector 20 causes the swing sleeve 23 to rotate downward on the inclined plane, the component of gravity will help the swing sleeve 23 slide or roll downward, making the rotation easier. However, when rotating upward on the inclined plane, it is necessary to overcome the component of gravity and friction, making the rotation more difficult. Therefore, in this application, the support surface 27 is a plane. The plane support surface 27 can provide the same support effect for the swing sleeve 23 when the connector 20 rotates forward or backward, ensuring that the swing sleeve 23 remains balanced during the process of disengaging from the groove 24. No matter which direction the swing sleeve 23 rotates with the connector 20, the contact method and support force between the plane support surface 27 and the swing sleeve 23 are relatively stable and consistent.
[0051] It should be noted that both the sleeve 21 and the limiting sleeve 28 are provided with through holes 29 for the connecting shaft 10 to pass through. Specifically, the limiting part 282 of the limiting sleeve 28 is provided with through holes 29, and the swing sleeve 23 and the groove 24 are also provided with through holes 29.
[0052] In the prior art, the swing sleeve 23 is located below the groove 24. External force needs to be transmitted to the swing sleeve 23 below through other components, and then transmitted from the swing sleeve 23 to the spring 30 through the groove 24. The force transmission path is relatively long, resulting in a slower response speed of the spring 30 compared to the first solution. When dealing with sudden impacts, it may not be able to play a timely and effective buffering role, and the protection effect on the spray boom frame 60 will be weakened. Therefore, in this embodiment, the swing sleeve 23 is located above the groove 24 and abuts against the spring 30. When the spray boom frame 60 is impacted by an external force, the swing sleeve 23 located above can feel the force immediately. Since it is in direct contact with the spring 30, it can quickly transmit the force to the spring 30, causing the spring 30 to compress quickly and play a buffering role. This can effectively reduce the impact force on the spray boom frame 60 and protect the spray boom frame 60 and related equipment.
[0053] To improve the stability of the swing sleeve 23's movement, a limiting sleeve 28 is also provided between the swing sleeve 23 and the spring 30. The limiting sleeve 28 can effectively restrict the position of the spring 30, preventing it from moving laterally or deviating during operation as much as possible. By utilizing gravity assistance, the swing sleeve 23 can quickly move upward and disengage from the groove 24 when encountering an obstacle, avoiding hard collisions. Similarly, after the external force disappears, the swing sleeve 23 can easily return to its initial position with the help of the spring 30 and other reset devices.
[0054] When in use, when the spray boom mount 60 collides with an obstacle, the swing sleeve 23 rotates out of the groove 24, causing the spring 30 to compress upward, which will cause the spray boom mount 60 to rotate and slide over the obstacle. After passing the obstacle, the spray boom mount 60 returns to its original assembly position due to its own weight, the angle of rotation, and the compression force of the spring 30. The swing sleeve 23 returns to the groove 24, thus preventing the spray boom mount 60 from being scratched. The spray boom mount 60 can swing forward or backward to prevent the spray boom mount 60 from being scratched when reversing, effectively protecting the spray boom mount 60 and ensuring its service life.
[0055] Understandably, in other embodiments, the second mating surface can be an inclined plane, which can provide a clear disengagement direction and tendency for the swing sleeve. When the connector rotates, the swing sleeve will gradually rise along the direction of the inclined plane and disengage from the groove. The inclination angle of the inclined plane can be designed according to actual needs to precisely control the speed and force of the swing sleeve's disengagement, ensuring reliable disengagement under different working conditions.
[0056] Understandably, in other embodiments, both the first mating surface and the second mating surface can be inclined surfaces. When the connector is subjected to an external force, it rotates circumferentially relative to the connecting shaft, causing the first mating surface and the second mating surface to rotate relative to each other. This results in the inclined surfaces at different positions of the first mating surface and the second mating surface coming into contact with each other, forcing one of the two sleeve parts to move axially to change the height of the connected spray bar frame.
[0057] Example 2:
[0058] like Figure 6 and Figure 7 As shown, this embodiment provides a boom sprayer, including a main unit 50 and a plurality of boom frames 60 connected in sequence on the main unit 50. Adjacent boom frames 60 are connected by a boom frame anti-scratch device according to any of the above-mentioned technical solutions. Because the boom frame anti-scratch device can automatically adjust when encountering obstacles and return to its original position after the obstacles are removed, the boom sprayer can better adapt to different terrains and working environments, reducing the risk of hard collisions with the boom frames 60. Furthermore, the boom frame anti-scratch device is equipped with a threaded section 12 and a nut 40, allowing direct rotation of the nut 40 to adjust the pressure of the spring 30, making adjustments easier to adapt to different working environments and requirements.
[0059] The spray boom mount 60 includes a front frame 61 connected to the main unit 50 and a rear frame 62 located away from the main unit 50. The front frame 61 and the rear frame 62 are connected by a spray boom mount anti-scratch joint device. The included angle between the front frame 61 and the spray boom mount anti-scratch joint device is 115°. By reasonably setting the included angle between the front frame 61 and the spray boom mount anti-scratch joint device, the spray boom mount 60 can adjust its posture more flexibly when facing different terrain conditions.
[0060] It should be noted that the included angle between the front frame 61 and the anti-scratch joint device of the spray boom frame is specifically the included angle between the length direction of the front frame 61 and the axis of the connecting shaft 10 of the anti-scratch joint device.
[0061] It is understood that in other embodiments, the included angle between the front frame and the anti-scratch device may also be other suitable angles such as 114°, 116°, 117°, 118°, 119°, 120°, etc.
[0062] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.
Claims
1. A scratch-proof joint device for a spray boom support, comprising a connecting shaft and two connecting members for connecting adjacent spray boom supports, respectively, the connecting members comprising a sleeve part slidingly fitted on the connecting shaft, the connecting shaft being provided with a support part supporting the sleeve part, characterized in that, The connecting shaft is further provided with a threaded section, a spring and a nut are sleeved on the connecting shaft away from the supporting part, the nut is threadedly connected with the threaded section, and two ends of the spring are respectively abutted with the nut and one of the sleeve joint parts, so that the two sleeve joint parts are abutted under the action of the spring, one of the sleeve joint parts is provided with a first matching surface, and the other is provided with a second matching surface abutted with the first matching surface, the connecting piece is relatively rotated around the circumference of the connecting shaft under the action of external force, so that the first matching surface and the second matching surface are relatively rotated, and the relative rotation of the first matching surface and the second matching surface forces one of the sleeve joint parts to move axially to change the height of the connected spray bar frame, and the connecting piece has a tendency to keep the initial contact position under the action of the elastic force of the spring.
2. The spray bar rack anti-scratch joint device according to claim 1, characterized in that, One of the sleeve joint parts is provided with a cylindrical swing sleeve, the other sleeve joint part is provided with a groove, the first matching surface comprises a cylindrical surface of the swing sleeve, and the second matching surface comprises an arc surface or an inclined surface located on both sides of the groove, the swing sleeve is located in the groove when the connecting piece is in the initial contact position, and the connecting piece is relatively rotated around the circumference of the connecting shaft under the action of external force, so that the swing sleeve is separated from the groove along the second matching surface.
3. The spray bar rack anti-scratch joint device of claim 2, wherein, When the connecting piece is in the initial contact position, the swing sleeve is supported on the second matching surface and has a gap between the swing sleeve and the bottom surface of the groove.
4. The anti-scratch pinning device for a boom holder according to claim 2, characterized in that, The groove is provided with a supporting surface on both sides of the groove opening for supporting the swing sleeve separated from the groove, and the supporting surface is connected with the second matching surface.
5. The anti-scratch pinning device for a boom holder according to claim 4, characterized in that, The supporting surface is a plane.
6. The anti-scratch pinning device for a boom holder according to claim 2, characterized in that, The swing sleeve is located above the groove and abutted with the spring.
7. The spray bar rack scratch prevention device of claim 1, wherein, The connecting shaft is further sleeved with a limiting sleeve, the limiting sleeve comprises a pressing part located between the spring and the nut and a limiting part sleeved on the outer ring of the spring.
8. The spray bar rack scratch prevention device of claim 1, wherein, The connecting piece further comprises a positioning part and a connecting part, the connecting part is used for connecting with the spray bar frame, the positioning part and the sleeve joint part are respectively connected at two ends of the connecting part, the positioning part is sleeved on the connecting shaft, and the nut is arranged between the sleeve joint part and the positioning part and is arranged in a spaced mode with the sleeve joint part and the positioning part.
9. A boom sprayer comprising a main unit and a plurality of sequentially connected boom supports provided on the main unit, characterized in that, Two adjacent spray bar frames are connected through the spray bar frame anti-scratch joint device of any one of claims 1 to 8.
10. The boom sprayer of claim 9, wherein, The spray bar frame comprises a front frame connected with a main machine and a rear frame away from the main machine, the front frame and the rear frame are connected through the spray bar frame anti-scratch joint device, and the included angle between the front frame and the spray bar frame anti-scratch joint device is 115°.