Foldable and telescopic sunshade mechanism and mower

Abstract

The utility model discloses a foldable and telescopic sunshade mechanism, belongs to the field of mowers, solves the problem that an existing sunshade is poor in sunshade effect, and adopts the technical scheme that a supporting unit is adopted, a sunshade rod is used for supporting sunshade cloth, and the sunshade cloth is arranged on the sunshade rod; the head end of the sun-shading rod and the head end of the supporting unit are hinged to different height positions of the installation carrier respectively, the tail end of the sun-shading rod is hinged to the tail end of the supporting unit, at least one part of the sun-shading rod and at least one part of the supporting unit jointly form a closed connecting rod structure, and the shape of the supporting unit is variable. And the supporting unit rotates around a hinge point between the supporting unit and the mounting carrier so as to adjust the angle of the sun-shading rod relative to the horizontal plane. The angle of the sunshade can be adjusted, and the sunshade effect of the sunshade is improved. The utility model further discloses a mower.

Description

Technical Field

[0001] This utility model relates to the field of lawnmowers, and in particular to a foldable and retractable sunshade mechanism and a lawnmower. Background Technology

[0002] To provide operators with a comfortable and relaxed riding environment, and to provide them with shade and rain protection, existing technologies include foldable and retractable sunshade mechanisms on lawnmowers. For example, utility model patent CN201509442U discloses a ride-on lawnmower anti-tipping and rolling device, which includes a vertical support column installed on the lawnmower chassis. The support column is also connected to a longitudinal support extending horizontally forward of the machine body. A sunshade canopy is installed through the longitudinal support. However, the angle of the canopy cannot be adjusted, resulting in a fixed angle of sunshade, which cannot cope with different angles of sunlight and affects the user experience. Utility Model Content

[0003] The purpose of this invention is to provide a foldable and retractable sunshade mechanism, which solves the problem of poor sunshade effect in existing sunshades, makes the angle of the sunshade adjustable, and improves the sunshade effect.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a foldable and retractable sunshade mechanism, comprising a mounting carrier and a sunshade rod and a support unit disposed on the mounting carrier. The sunshade rod is used to support the sunshade cloth. The first end of the sunshade rod and the first end of the support unit are respectively hinged to different height positions of the mounting carrier. The last end of the sunshade rod and the last end of the support unit are hinged. At least a part of the sunshade rod and the support unit together form a closed linkage structure. The shape of the support unit is variable, and the angle of the sunshade rod relative to the horizontal plane can be adjusted by rotating the support unit around the hinge point between it and the mounting carrier.

[0005] After adopting the above technical solution, this utility model has the following advantages: First, at least a part of the sunshade rod and the support unit together form a closed linkage structure. This structure can effectively disperse the external forces borne by the sunshade, such as wind force and gravity, making the sunshade more stable during use and less prone to deformation or damage. Second, by rotating the support unit around the hinge point between it and the mounting carrier to change the shape of the support unit, the angle of the sunshade rod relative to the horizontal plane can be changed, and the angle of the sunshade cloth on the support unit relative to the horizontal plane can be changed accordingly to adapt to different angles of direct sunlight, providing better sunshade effect for operators, greatly improving the convenience and comfort of use, and also allowing the sunshade to be easily folded up when not in use, greatly reducing the storage space of the overall sunshade mechanism, and facilitating carrying and transportation.

[0006] Furthermore, the support unit includes a first support link hinged to the mounting carrier and a second support link hinged to the sunshade rod. The first support link and the second support link are hinged together, and the relative rotation of the first support link and / or the second support link about the hinge point between the first support link and the second support link adjusts the shape of the support unit.

[0007] By employing the aforementioned technical solution, the shape of the support unit is adjusted by the relative rotation of the first and second support links around their hinge point. This increases the adjustment dimension and allows for more precise adjustment of the angle between the sunshade rod and the sunshade cloth relative to the horizontal plane according to different lighting and working environment requirements, further improving the sunshade effect and meeting the sunshade needs of operators in various complex scenarios as much as possible. The relative rotation of the first and second support links allows the support unit to be folded in a more reasonable manner, further reducing the volume of the sunshade in its folded state. The dual support link structure makes the support unit more adaptable to different sunshade adjustment needs. When encountering wind forces from different directions or different road conditions during the mower's journey, the first and second support links can automatically adjust their relative positions according to the force conditions to maintain the stability of the sunshade. For example, in the event of strong crosswinds, the relative rotation of the links can adjust the angle of the sunshade, reducing the impact of wind resistance on the sunshade and ensuring that the sunshade always provides effective sun and rain protection for the operator.

[0008] Furthermore, one of the first support link and the second support link is provided with a first positioning hole and a second positioning hole arranged circumferentially around the first positioning hole, and the other of the first support link and the second support link is provided with a third positioning hole and a fourth positioning hole. The third positioning hole and the first positioning hole are hinged together by a first fastener. After the first support link and the second support link rotate relative to each other, the second positioning hole and the fourth positioning hole are fixedly connected by a second fastener.

[0009] By employing the aforementioned technical solution, the third positioning hole and the first positioning hole are hinged together using the first fastener, providing a stable initial connection foundation for the double-support rod structure while ensuring a certain degree of rotational flexibility. This allows the first and second support rods to maintain relative stability in their initial state. When adjusting the angle of the sunshade, the operator only needs to loosen the second fastener. Combining the multiple position options of the second and fourth positioning holes, the first fastener is used as a fulcrum, providing convenient one-handed operation. The first and second support rods are rotated around the first fastener to the appropriate position and then secured with the second fastener. The operation is simple and easy to understand. In actual use, the operator can hold either the first or second support rod with one hand, using the first fastener as a fulcrum for rotation, while preparing to operate the second fastener for fixation with the other hand, further improving operational convenience and work efficiency.

[0010] Furthermore, an angle adjustment plate is provided between the first support link and the second support link. The angle adjustment plate has a first positioning hole and a second positioning hole arranged circumferentially around the first positioning hole. One of the first support link and the second support link is fixedly connected to the angle adjustment plate. The other of the first support link and the second support link has a third positioning hole and a fourth positioning hole. The third positioning hole and the first positioning hole are hinged by a first fastener. After the first support link and the second support link rotate relative to each other, the second positioning hole and the fourth positioning hole are fixedly connected by a second fastener.

[0011] By employing the aforementioned technical solution, the third positioning hole and the first positioning hole are hinged together using the first fastener, providing a stable initial connection foundation for the double-support linkage structure while ensuring a certain degree of rotational flexibility. This allows the first and second support linkages to maintain relative stability in their initial state. When adjusting the sunshade angle, the operator only needs to loosen the second fastener. Combining the multiple position options of the second and fourth positioning holes, the first fastener is set as the fulcrum, providing convenient one-handed operation. The first and second support linkages are rotated around the first fastener to the appropriate position and then secured with the second fastener. The operation is simple and easy to understand. The angle adjustment plate is equipped with the first positioning hole and second positioning holes arranged around its circumference, providing clearer markings for sunshade angle adjustment and making adjustment more convenient. Furthermore, the angle adjustment plate connects the first and second support linkages, making the connection between them more stable. When the sunshade is subjected to external forces, the angle adjustment plate can work with the linkages to disperse and transfer stress, further improving the mechanical stability of the entire sunshade mechanism in complex environments. By centralizing the positioning holes on the angle adjustment plate, the machining difficulty of individual parts is reduced compared to machining a complex positioning hole layout on each of the two connecting rods. For the first and second support connecting rods, only the relatively simple third and fourth positioning holes need to be machined, reducing machining steps and costs.

[0012] Furthermore, the closed linkage structure is provided in two parts, and the two closed linkage structures are symmetrically arranged on both sides of the mounting carrier. The sunshade mechanism also includes a synchronous adjustment structure connecting the second fasteners on both sides, which is used to drive the second fasteners on both sides to move synchronously.

[0013] Through the above technical solution, two closed linkage structures are symmetrically arranged on both sides of the mounting carrier, ensuring the symmetry and balance of the sunshade structure as much as possible. When the sunshade is subjected to external forces such as wind and vibration, the symmetrical structures on both sides can evenly distribute the force, avoiding tilting or damage caused by uneven force on one side. At the same time, a synchronous adjustment structure is set up to simultaneously drive the second fasteners on both sides to move synchronously. This means that when adjusting the angle of the sunshade, the operator does not need to operate the second fasteners on both sides separately. With just one operation, the angle of the support units on both sides can be adjusted synchronously, further ensuring the stability and balance of the sunshade. For example, when the operator needs to adjust the angle of the sunshade to adapt to the direction of sunlight, the synchronous adjustment structure can ensure that the angle adjustment on both sides is consistent, avoiding the uncoordinated situation where one side is higher than the other.

[0014] Furthermore, the synchronous adjustment structure includes two separate adjustment links that are fixedly connected to the second fasteners on both sides. A first elastic element is provided between the two adjustment links, and the second fasteners on both sides are inclined to enter the second positioning hole and the fourth positioning hole simultaneously due to the elastic action of the first elastic element.

[0015] Through the above technical solution, the first elastic element enables the synchronous adjustment structure to have automatic reset and self-tightening functions. After the angle of the sunshade is adjusted, under the elastic action of the first elastic element, the second fasteners on both sides always tend to simultaneously enter the second and fourth positioning holes, minimizing changes in the angle of the sunshade due to external forces. When adjusting the angle of the sunshade, the operator only needs to overcome the elastic force of the first elastic element to move the adjusting rod, move the second fastener out of the current positioning hole and rotate it to the appropriate positioning hole position. After releasing the adjusting rod, the first elastic element will automatically push the second fastener back into the positioning hole, completing the fixation.

[0016] Furthermore, the sunshade rod is adjustable from 45° to 90°.

[0017] Using the aforementioned technical solution, if the adjustable range of the sunshade rod is less than 45°, it is difficult to effectively adjust the sunshade angle according to different sun positions. If the adjustable range of the sunshade rod is greater than 90°, the adjustable range of the sunshade rod is too large, and the center of gravity of the entire sunshade structure will change significantly, which may make it very unstable. By setting an appropriate adjustment range, effective sunshade can be achieved while ensuring the stability of the structure.

[0018] Furthermore, the support unit includes a first support link hinged to the mounting carrier and a second support link hinged to the sunshade rod. The first and second support links are slidably connected to adjust the linear distance between the front end and the rear end of the support unit.

[0019] The sliding connection design, achieved through the aforementioned technical solution, makes operation more intuitive and convenient. Operators can easily change the length of the support unit and thus adjust the angle of the sunshade by simply pushing or pulling the first and second support rods.

[0020] Furthermore, a second elastic element is provided between the second support link and the sunshade bar to maintain tension between the sunshade bar and the second support link.

[0021] Through the above technical solution, the presence of the second elastic element ensures that the sunshade rod and the second support link are always kept in a taut state, and the sunshade cloth can always be kept in a relatively flat state.

[0022] Another objective of this utility model is to provide a lawnmower, including a housing and a blade assembly, and also including the foldable and retractable sunshade mechanism described in any of the above technical solutions.

[0023] Through the above technical solutions, the foldable and retractable sunshade provides operators with better sun and rain protection. The sunshade angle can be adjusted, allowing the sunshade to more accurately adapt to different angles of direct sunlight, bringing better sunshade effect to the operator. The closed linkage structure also makes the sunshade mechanism more stable. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a structural schematic diagram of the foldable and retractable sunshade mechanism in Embodiment 1 of this utility model;

[0026] Figure 2 In this utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0027] Figure 3 This is a structural schematic diagram of the foldable and retractable sunshade mechanism in Embodiment 2 of this utility model;

[0028] Figure 4 This is a cross-sectional view of the adjusting linkage in Embodiment 2 of this utility model;

[0029] Figure 5 This is a structural schematic diagram of the foldable and retractable sunshade mechanism in Embodiment 4 of this utility model;

[0030] Figure 6 This is a schematic diagram of the foldable and retractable sunshade mechanism of Embodiment 4 of this utility model from another perspective.

[0031] Figure 7 This is a schematic diagram of the lawnmower in Embodiment 5 of this utility model;

[0032] In the diagram, 10 is the mounting carrier; 20 is the sunshade rod; 30 is the support unit; 31 is the first support link; 32 is the second support link; 33 is the first positioning hole; 34 is the second positioning hole; 35 is the third positioning hole; 36 is the fourth positioning hole; 37 is the positioning through hole; 40 is the angle adjustment plate; 50 is the first fastener; 51 is the second fastener; 60 is the reinforcing rod; 70 is the adjusting link; 71 is the first elastic element; 72 is the sleeve; 73 is the gripping part; 80 is the second elastic element; 90 is the housing; and 91 is the blade assembly. 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 Figure 1 and Figure 2 As shown, this utility model provides a foldable and retractable sunshade mechanism, including a mounting carrier 10 and a sunshade rod 20 and a support unit 30 disposed on the mounting carrier 10. The sunshade rod 20 is used to support the sunshade cloth. The first end of the sunshade rod 20 and the first end of the support unit 30 are respectively hinged to different height positions of the mounting carrier 10. The tail end of the sunshade rod 20 and the tail end of the support unit 30 are hinged. At least a part of the sunshade rod 20 and the support unit 30 are closed together to form a linkage structure. The shape of the support unit 30 is variable, and the angle of the sunshade rod 20 relative to the horizontal plane can be adjusted by rotating the support unit 30 about the hinge point between it and the mounting carrier 10.

[0041] First, at least a portion of the sunshade rod 20 and the support unit 30 together form a closed linkage structure. This structure can effectively disperse the external forces borne by the sunshade, such as wind and gravity, making the sunshade more stable during use and less prone to deformation or damage. Second, by rotating the support unit 30 around the hinge point between it and the mounting carrier 10, the shape of the support unit 30 can be changed, which can realize the angle change of the sunshade rod 20 relative to the horizontal plane. Correspondingly, the angle of the sunshade cloth on the support unit 30 relative to the horizontal plane can be changed to adapt to different angles of direct sunlight, providing better sunshade effect for operators, greatly improving the convenience and comfort of use, and also allowing the sunshade to be easily folded up when not in use, greatly reducing the storage space of the overall sunshade mechanism and making it convenient to carry and transport.

[0042] To further enhance the structural stability of the sunshade mechanism, two closed linkage structures are provided, symmetrically arranged on both sides of the mounting carrier 10, ensuring the symmetry and balance of the sunshade structure as much as possible. When the sunshade is subjected to external forces such as wind and vibration, the symmetrical structures on both sides can evenly distribute the force, avoiding tilting or damage caused by uneven force on one side. A reinforcing rod 60 is also connected between the two closed linkage structures to further enhance the structural strength of the sunshade.

[0043] Specifically, the support unit 30 includes a first support link 31 hinged to the mounting carrier 10 and a second support link 32 hinged to the sunshade rod 20. The first support link 31 and the second support link 32 are hinged together, and their relative rotation around the hinge point allows adjustment of the initial shape of the support unit 30. This increases the adjustment dimensionality and enables more precise adjustment of the angle between the sunshade rod 20 and the sunshade cloth relative to the horizontal plane according to different lighting and working environment requirements, further improving the sunshade effect and meeting the sunshade needs of workers in various complex scenarios as much as possible. The relative rotation of the first support link 31 and the second support link 32 also allows the support unit 30 to be folded in a more reasonable manner, further reducing the volume of the sunshade in the folded state. The dual support link structure makes the support unit 30 more adaptable to different sunshade adjustment requirements. When encountering winds from different directions or varying road conditions while the lawnmower is traveling, the first support link 31 and the second support link 32 can automatically adjust their relative positions according to the force applied to maintain the stability of the sunshade. For example, in the event of strong crosswinds, the relative rotation of the first support link 31 and the second support link 32 can adjust the angle of the sunshade, reducing the impact of wind resistance on the sunshade and ensuring that the sunshade can always provide effective sun and rain protection for the operator.

[0044] It should be noted that the linear distance between the first support link 31 and the second support link 32 can also be adjusted by rotating them individually. The first and second supports 30 are only for easy distinction between the two ends of the sunshade rod 20. In other embodiments, the second end of the sunshade rod 20 can also be hinged to the mounting carrier 10.

[0045] Furthermore, an angle adjustment plate 40 is provided between the first support link 31 and the second support link 32. The angle adjustment plate 40 is provided with a first positioning hole 33 and a second positioning hole 34 arranged around the first positioning hole 33. The first support link 31 and the angle adjustment plate 40 are fixedly connected. The other side of the second support link 32 is provided with a third positioning hole 35 and a fourth positioning hole 36. The third positioning hole 35 and the first positioning hole 33 are hinged by a first fastener 50. After the first support link 31 and the second support link 32 rotate relative to each other, the second positioning hole 34 and the fourth positioning hole 36 are fixedly connected by a second fastener 51. The third positioning hole 35 and the first positioning hole 33 are hinged together by the first fastener 50, providing a stable initial connection foundation for the double support rod structure, while ensuring a certain degree of rotational flexibility. This allows the first support rod 31 and the second support rod 32 to remain relatively stable in the initial state. When adjusting the angle of the sunshade, the operator only needs to loosen the second fastener 51. Combining the multiple position selection of the second positioning hole 34 and the fourth positioning hole 36, the first fastener 50 is set as the fulcrum, providing the operator with convenient one-handed operation. The first support rod 31 and the second support rod 32 are rotated around the first fastener 50 to the appropriate position, and then fixed with the second fastener 51. The operation method is simple and easy to understand. The angle adjustment plate 40 is provided with a first positioning hole 33 and a second positioning hole 34 arranged around its circumference, providing clearer markings for adjusting the angle of the sunshade and making adjustment more convenient. Furthermore, the angle adjustment plate 40 connects the first support rod 31 and the second support rod 32, making the connection between the two support rods more stable. When the sunshade is subjected to external forces, the angle adjustment plate 40 can work with the connecting rods to disperse and transfer stress, further improving the mechanical stability of the entire sunshade mechanism in complex environments. Concentrating the positioning holes on the angle adjustment plate 40 reduces the machining difficulty of individual parts compared to machining a complex layout of positioning holes separately on the first support rod 31 and the second support rod 32. For the first support rod 31 and the second support rod 32, only the relatively simple third positioning hole 35 and fourth positioning hole 36 need to be machined, reducing machining steps and costs.

[0046] The second positioning hole 34 is a series of through holes arranged around the circumference of the first positioning hole 33. This provides a standardized preset angle for adjusting the angle of the sunshade. Operators do not need to rely on experience to make a rough angle estimate, but can directly adjust the sunshade to the appropriate angle according to the position of the second positioning hole 34 on the angle adjustment plate 40, which further improves the accuracy and convenience of angle adjustment.

[0047] Furthermore, the adjustable range of the sunshade rod 20 is between 45° and 90°. If the adjustable range of the sunshade rod 20 is less than 45°, it is difficult to effectively adjust the shading angle according to different sun positions. If the adjustable range of the sunshade rod 20 is greater than 90°, the large adjustment range will cause a significant shift in the center of gravity of the entire shading structure, potentially making it very unstable. The adjustable range of the sunshade rod 20 can be 50°, 60°, etc. By setting an appropriate adjustment range, effective shading can be achieved while ensuring the stability of the structure.

[0048] The mounting carrier 10 includes multiple liftable support frames, enabling the vertical lifting and lowering of the awning mechanism and adjusting the awning height.

[0049] In use, adjust the distance between the mutual support frames so that the mounting carrier 10 moves to the target height. Then, pull the reinforcing rod 60 upward to make the sunshade rod 20 rotate upward relative to the mounting carrier 10. At the same time, the first support link 31 rotates upward relative to the mounting carrier 10. Since the second support link 32 and the first support link 31 are fixedly connected by the second fastener 51, the second support link 32 and the first support link 31 rotate synchronously, and the sunshade is in the open state.

[0050] When the awning mechanism is in the folded state, by loosening the second fastener 51, the second support rod 32 can be pulled up or down to rotate around the first fastener 50 to the target position, and then re-secured with the second fastener 51 to achieve angle adjustment of the awning. When storing, by pulling down the reinforcing rod 60, the awning rod 20 rotates downward relative to the mounting carrier 10. Simultaneously, the first support rod 31 rotates downward relative to the mounting carrier 10. Since the second support rod 32 and the first support rod 31 are fixedly connected by the second fastener 51, they rotate synchronously until the awning rod 20 is in contact with the mounting carrier 10, at which point the awning is in the folded state.

[0051] It should be noted that when the sunshade is in the open state, when the axis of the first support link 31 and the axis of the second support link 32 are not on the same axis, the sunshade rod 20, the first support link 31 and the second support link 32, and at least a part of the mounting carrier 10 together form a quadrilateral link structure. When the axis of the first support link 31 and the axis of the second support link 32 are on the same axis, the sunshade rod 20, the first support link 31 and the second support link 32, and at least a part of the mounting carrier 10 together form a closed link structure.

[0052] It should be noted that when the sunshade is in the open state, the closed linkage structure tends to be a triangular structure. The three sides of the triangular structure support each other and can evenly distribute the external force, making the triangular structure less prone to deformation when subjected to external forces, thus making the sunshade more stable when it is in the open state.

[0053] It should be noted that the first fastener 50 can be a screw, the first positioning hole 33 and the third positioning hole 35 can be threaded holes, the second fastener 51 can be a pin, and the second positioning hole 34 and the fourth positioning hole 36 can be round holes, square holes, etc.

[0054] Understandably, in other embodiments, the second support link 32 and the angle adjustment plate 40 are fixedly connected, and the first support link 31 is provided with a third positioning hole 35 and a fourth positioning hole 36.

[0055] Understandably, in other embodiments, the second positioning hole 34 is an arc-shaped hole arranged around the circumference of the first positioning hole 33, which can achieve stepless adjustment and make the shading angle of the awning structure more.

[0056] Example 2:

[0057] like Figure 3 and Figure 4 As shown in this embodiment, a second fastener 51 is provided on both sides of the closed linkage structure. The sunshade mechanism also includes a synchronous adjustment structure connecting the second fasteners 51 on both sides, which is used to simultaneously drive the second fasteners 51 on both sides to move synchronously. This allows the operator to adjust the angle of the sunshade without having to operate the second fasteners 51 on both sides separately. With just one operation, the angle of the support units on both sides can be adjusted synchronously, further ensuring the stability and balance of the sunshade. For example, when the operator needs to adjust the angle of the sunshade to adapt to the direction of sunlight, the synchronous adjustment structure can ensure that the angle adjustment on both sides is consistent, avoiding the uncoordinated situation where one side of the sunshade is higher than the other.

[0058] Specifically, the synchronous adjustment structure includes two adjustment rods 70, each individually and fixedly connected to a second fastener 51 on both sides. A first elastic element 71 is provided between the two adjustment rods 70. The second fasteners 51 on both sides, under the elastic action of the first elastic element 71, tend to simultaneously enter the second positioning hole 34 and the fourth positioning hole 36. After the angle of the sunshade is adjusted, under the elastic action of the first elastic element 71, the second fasteners 51 on both sides always tend to simultaneously enter the second positioning hole 34 and the fourth positioning hole 36, minimizing the change in the angle of the sunshade due to external forces. When adjusting the angle of the sunshade, the operator only needs to overcome the elastic force of the first elastic element 71 to move the adjustment rod 70, move the second fastener 51 out of the current positioning hole and rotate it to the appropriate positioning hole position. After releasing the adjustment rod 70, the first elastic element 71 will automatically push the second fastener 51 back into the current positioning hole, completing the fixing.

[0059] To ensure smoother movement of the second fastener 51, the synchronous adjustment structure also includes a sleeve 72 fitted over the adjusting rod 70 and the first elastic element 71. The sleeve 72 is fixedly connected to the support unit 30, limiting the movement of the adjusting rod 70 and the first elastic element 71, thus ensuring smoother movement of the second fastener 51. The adjusting rod 70 has a gripping part 73 at the end near the first elastic element 71, extending beyond the sleeve 72. This gripping part 73 facilitates maintenance and repair, allowing maintenance personnel to easily operate the adjusting rod 70.

[0060] Other content not described in this embodiment can be referred to in the above embodiments.

[0061] Example 3:

[0062] In this embodiment, the first support link has a first positioning hole and a second positioning hole arranged circumferentially around the first positioning hole. The second support link has a third positioning hole and a fourth positioning hole. The third positioning hole and the first positioning hole are hinged together by a first fastener. After the first and second support links rotate relative to each other, the second positioning hole and the fourth positioning hole are fixedly connected by the second fastener. Hinging the third positioning hole and the first positioning hole together by the first fastener provides a stable initial connection foundation for the double support link structure, while ensuring a certain degree of rotational flexibility. This allows the first and second support links to remain relatively stable in the initial state. When adjusting the angle of the sunshade, the operator only needs to loosen the second fastener. Combining the multiple position selections of the second and fourth positioning holes, the first fastener is set as the fulcrum, providing the operator with convenient one-handed operation. The first and second support links are rotated around the first fastener to the appropriate position and then fixed with the second fastener. The operation method is simple and easy to understand. In practical use, the operator can hold the first or second support rod with one hand and rotate it with the first fastener as the fulcrum, while the other hand is ready to operate the second fastener for fixing, which further improves the convenience of operation and work efficiency.

[0063] Understandably, in other embodiments, the second support link is provided with a first positioning hole and a second positioning hole arranged circumferentially around the first positioning hole, and the first support link is provided with a third positioning hole and a fourth positioning hole. The third positioning hole and the first positioning hole are hinged by a first fastener. After the first support link and the second support link rotate relative to each other, the second positioning hole and the fourth positioning hole are fixedly connected by a second fastener.

[0064] Other content not described in this embodiment can be referred to in the above embodiments.

[0065] Example 4:

[0066] like Figure 5 and Figure 6 As shown, this embodiment discloses a sliding connection between the first support rod 31 and the second support rod 32 to adjust the linear distance between the front end and the rear end of the support unit 30. The sliding connection design makes operation more intuitive and convenient. The operator only needs to push or pull the first support rod 31 and the second support rod 32 to change the length of the support unit 30, thereby adjusting the angle of the sunshade.

[0067] It should be noted that the first support link 31 and the second support link 32 are provided with multiple positioning through holes 37 along their length in a rectangular shape, which can be used to fix the first support link 31 and the second support link 32 with pins.

[0068] To further enhance the stability of the sunshade mechanism, a second elastic element 80 is provided between the second support link 32 and the sunshade rod 20 to maintain tension between the sunshade rod 20 and the second support link 32. The presence of the second elastic element 80 ensures that the sunshade rod 20 and the second support link 32 remain taut, allowing the sunshade fabric to remain in a relatively flat state. The second elastic element 80 can be a spring.

[0069] Other content not described in this embodiment can be referred to in the above embodiments.

[0070] Example 5:

[0071] like Figure 7 As shown, this embodiment discloses a lawnmower, including a housing 90 and a blade assembly 91, and also includes a foldable and retractable sunshade mechanism of any of the above embodiments, providing better sunshade and rain protection for the operator. The sunshade angle can be adjusted, allowing the sunshade to more accurately adapt to different angles of direct sunlight, bringing better sunshade effect to the operator. The sunshade mechanism includes a mounting carrier 10 and a sunshade rod 20 and a support unit 30 disposed on the mounting carrier 10. The first end of the sunshade rod 20 and the first end of the support unit 30 are respectively hinged to different height positions of the mounting carrier 10, and the tail end of the sunshade rod 20 is hinged to the tail end of the support unit 30. The sunshade rod 20, the support unit 30 and the mounting carrier 10 together form a closed linkage structure, which can also make the sunshade mechanism more stable.

[0072] It should be noted that the portion of the housing 90 near the tail fin has reserved space for installing a foldable and retractable sunshade mechanism. The housing 90 has mounting holes, into which the mounting carrier 10 for the foldable and retractable sunshade mechanism can be inserted for installation.

[0073] Other content not described in this embodiment can be referred to in the above embodiments.

[0074] 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 foldable and retractable sunshade mechanism, characterized in that, The device includes a mounting carrier (10) and a sunshade rod (20) and a support unit (30) mounted on the mounting carrier (10). The sunshade rod (20) is used to support the sunshade cloth. The first end of the sunshade rod (20) and the first end of the support unit (30) are respectively hinged to different height positions of the mounting carrier (10). The tail end of the sunshade rod (20) is hinged to the tail end of the support unit (30). The sunshade rod (20), the support unit (30) and at least a part of the mounting carrier (10) together form a closed linkage structure. The shape of the support unit (30) is variable, and the angle of the sunshade rod (20) relative to the horizontal plane can be adjusted by rotating the support unit (30) about the hinge point between it and the mounting carrier (10).

2. The foldable and retractable sunshade mechanism according to claim 1, characterized in that, The support unit (30) includes a first support link (31) hinged to the mounting carrier (10) and a second support link (32) hinged to the sunshade rod (20). The first support link (31) and the second support link (32) are hinged together. The relative rotation of the first support link (31) and / or the second support link (32) about the hinge point between the first support link (31) and the second support link (32) is used to adjust the shape of the support unit (30).

3. The foldable and retractable sunshade mechanism according to claim 2, characterized in that, One of the first support link (31) and the second support link (32) is provided with a first positioning hole (33) and a second positioning hole (34) arranged around the first positioning hole (33). The other of the first support link (31) and the second support link (32) is provided with a third positioning hole (35) and a fourth positioning hole (36). The third positioning hole (35) and the first positioning hole (33) are hinged by a first fastener (50). After the first support link (31) and the second support link (32) rotate relative to each other, the second positioning hole (34) and the fourth positioning hole (36) are fixedly connected by a second fastener (51).

4. The foldable and retractable sunshade mechanism according to claim 2, characterized in that, An angle adjustment plate (40) is provided between the first support link (31) and the second support link (32). The angle adjustment plate (40) is provided with a first positioning hole (33) and a second positioning hole (34) arranged around the first positioning hole (33). One of the first support link (31) and the second support link (32) is fixedly connected to the angle adjustment plate (40). The other of the first support link (31) and the second support link (32) is provided with a third positioning hole (35) and a fourth positioning hole (36). The third positioning hole (35) and the first positioning hole (33) are hinged by a first fastener (50). After the first support link (31) and the second support link (32) rotate relative to each other, the second positioning hole (34) and the fourth positioning hole (36) are fixedly connected by a second fastener (51).

5. The foldable and retractable sunshade mechanism according to claim 3 or 4, characterized in that, The closed linkage structure is provided in two parts, and the two closed linkage structures are symmetrically arranged on both sides of the mounting carrier (10). The sunshade mechanism also includes a synchronous adjustment structure connecting the second fasteners (51) on both sides, which is used to drive the second fasteners (51) on both sides to move synchronously at the same time.

6. The foldable and retractable sunshade mechanism according to claim 5, characterized in that, The synchronous adjustment structure includes two separate adjustment links (70) that are fixedly connected to the second fasteners (51) on both sides. A first elastic element (71) is provided between the two adjustment links (70). The second fasteners (51) on both sides are subject to the elastic action of the first elastic element (71) and tend to enter the second positioning hole (34) and the fourth positioning hole (36) simultaneously.

7. The foldable and retractable sunshade mechanism according to claim 1, characterized in that, The sunshade rod (20) is adjustable from 45° to 90°.

8. The foldable and retractable sunshade mechanism according to claim 1, characterized in that, The support unit (30) includes a first support link (31) hinged to the mounting carrier (10) and a second support link (32) hinged to the sunshade rod (20). The first support link (31) and the second support link (32) are slidably connected to adjust the length of the support unit (30).

9. The foldable and retractable sunshade mechanism according to claim 8, characterized in that, The second support link (32) and the sunshade bar (20) have a second elastic element (80) that keeps the sunshade bar (20) and the second support link (32) tensioned.

10. A lawnmower, comprising a housing (90) and a blade assembly (91), characterized in that, The housing (90) is provided with a foldable and retractable sunshade mechanism as described in any one of claims 1 to 9.

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