Lawn mower

Abstract

The utility model provides a mowing machine. The mowing machine comprises a machine frame, a walking assembly, a header assembly and a lifting assembly. The walking assembly is installed on the rack and used for driving the rack to walk. The header assembly is indirectly installed on the machine frame so as to conduct mowing operation. The lifting assembly comprises a locking component, the locking component comprises a movable part and a limiting part, the limiting part is installed on the rack, the header assembly is connected to the movable part, and the movable part can be locked at a first position and a second position through the limiting part; when the movable part is locked at the first position, the header assembly is locked at the first station, when the movable part is locked at the second position, the header assembly is locked at the second station, and the second station is higher than the first station. The technical problems that a header assembly is poor in stability and prone to being damaged under the uneven road condition can be solved.

Description

Technical Field

[0001] The utility model relates to the field of garden machinery, in particular to a lawn mower. Background Art

[0002] As a professional tool for mowing or trimming lawns, lawn mowers are widely used in farmlands, lawns, parks, golf courses, etc. When lawn mowers are exported or transported to other places, if the impact of wind and waves during sea transportation causes the hull to vibrate, the road surface to sink, and the terrain to be uneven, it will cause the cutting table assembly to jump and vibrate. In extreme cases, it may even cause the permanent bending and deformation of the height adjustment plate of the cutting table assembly, causing great economic losses.

[0003] Based on this, exploring a lawn mower that can adjust the height of the cutting table assembly and stably lock the cutting table assembly to improve the stability of the cutting table assembly under different working conditions is a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the utility model provides a lawn mower to improve the technical problem that the cutting table assembly has poor stability and is easily damaged under uneven road conditions.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a lawn mower, which includes: a frame, a walking assembly, a cutting table assembly and a lifting assembly; the walking assembly is installed on the frame to drive the frame to walk; the cutting table assembly is installed on the frame to perform mowing operations; the lifting assembly includes a locking component, the locking component includes a movable part and a limiting part, the limiting part is installed on the frame, the cutting table assembly is connected to the movable part, and the movable part can be locked in a first position and a second position by the limiting part; wherein, when the movable part is locked in the first position, the cutting table assembly is locked in a first position, and when the movable part is locked in the second position, the cutting table assembly is locked in a second position, and the height of the second position is higher than that of the first position.

[0006] In an example of the lawn mower of the present utility model, the movable part includes a connecting plate and a first pedal connected to the connecting plate, and the first pedal is located on a side of the connecting plate away from the frame.

[0007] In an example of the lawn mower of the utility model, the connecting plate includes a first limiting structure arranged at one end close to the limiting portion, the first limiting structure is located on the side of the connecting plate facing the frame, and when the first limiting structure is connected to the limiting portion, the movable portion is locked in the first position.

[0008] In an example of the lawn mower of the utility model, the connecting plate further comprises a second limiting structure, the second limiting structure is arranged on the vertical surface of the connecting plate facing the limiting portion, and when the second limiting structure is engaged with the limiting portion, the movable portion is locked in the second position.

[0009] In an example of the lawn mower of the present utility model, the locking component further includes a connecting shaft, and the movable part is installed on the connecting shaft.

[0010] In an example of the lawn mower of the utility model, the movable part further comprises a rotating sleeve, the rotating sleeve passes through the connecting plate and is fixedly connected to the connecting plate, and the rotating sleeve is sleeved on the connecting shaft.

[0011] In an example of the lawn mower of the present utility model, the locking component further includes a return spring, and the return spring is sleeved on the outside of the rotating sleeve, one end of the return spring is fixed, and the other end is connected to the connecting plate.

[0012] In an example of the lawn mower of the present utility model, the limiting part includes a limiting shaft and a fixing bracket for mounting the limiting shaft, and the fixing bracket is fixedly mounted on a side of the frame away from the cutting table assembly.

[0013] In an example of the lawn mower of the present utility model, the fixed bracket includes two fixed plates arranged opposite to each other, and the two ends of the limiting shaft are respectively connected to the two fixed plates.

[0014] In an example of the lawn mower of the present utility model, the lifting assembly further includes a connecting member and an operating member, the connecting member connects the operating member and the cutting table assembly, and the operating member drives the cutting table assembly to switch between the first station and the second station through the connecting member.

[0015] In one example of the lawn mower of the utility model, the connecting member includes a crank and a pull rod, the crank is hinged to the frame, the crank has a first end and a second end away from the hinge, the first end is rotatably connected to the pull rod, the end of the pull rod away from the crank is rotatably connected to the cutting table assembly, and the second end is connected to the connecting shaft.

[0016] In an example of the lawn mower of the present utility model, the operating member is fixedly connected to the crank and connected to the connecting shaft, and a second pedal is provided at one end of the operating member away from the connecting shaft.

[0017] In an example of the lawn mower of the present utility model, a shaft shoulder is arranged on the connecting shaft, the movable part is arranged on one side of the shaft shoulder, and the connecting member and the operating member are arranged on the other side of the shaft shoulder.

[0018] In an example of the lawn mower of the present utility model, the end of the operating member away from the second pedal is connected to the first end of the crank through a connecting rod, and the pull rod penetrates the connecting rod in a radial direction and is rotatably connected to the connecting rod.

[0019] In an example of the lawn mower of the utility model, there are four connecting members, namely a first connecting member, a second connecting member, a third connecting member and a fourth connecting member. Along the first direction, a first rotating shaft and a second rotating shaft arranged in parallel are rotatably connected on one side of the frame close to the cutting table assembly. The first connecting member and the second connecting member are arranged opposite to each other and are respectively fixedly connected to the two ends of the first rotating shaft. The third connecting member and the fourth connecting member are arranged opposite to each other and are respectively fixedly connected to the two ends of the second rotating shaft. Along the second direction, the first connecting member and the third connecting member are arranged in sequence, and the second connecting member and the fourth connecting member are arranged in sequence. A connecting rod is connected between the first connecting member and the third connecting member, one end of the connecting rod is connected in series to the connecting shaft, and the other end is connected to the reinforcing rib of the third connecting member.

[0020] The utility model lawn mower realizes the control of the lifting and lowering of the cutting table assembly by arranging a lifting assembly, and the movable part of the lifting assembly can be locked in the first position and the second position by the limit part, so that when the lifting assembly is locked in the first position, the cutting table assembly is locked in the first position, and when the lifting assembly is locked in the second position, the cutting table assembly is locked in the second position. Since the height of the second position is higher than the first position, when encountering uneven road conditions during transportation or transfer, the cutting table assembly can be locked in the higher second position, which is convenient for avoiding obstacles and reducing the impact on the cutting table assembly. At the same time, the lifting assembly can improve the stability of the fixing of the cutting table assembly and improve the problem of damage to the cutting table assembly due to jumping and vibration. In addition, the cutting table assembly has two first positions and second positions with different heights, which can adapt to the mowing of lawns of different heights and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the lawn mower of the utility model;

[0023] Figure 2It is a structural schematic diagram of a cutting table assembly, a frame and a lifting assembly in an embodiment of the lawn mower of the utility model;

[0024] Figure 3 It is a structural schematic diagram of a cutting table assembly, a frame and a lifting assembly from another perspective in one embodiment of the lawn mower of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of a lifting assembly in an embodiment of the lawn mower of the utility model;

[0026] Figure 5 It is a structural schematic diagram of a first connecting member, a locking member and an operating member in an embodiment of the lawn mower of the utility model;

[0027] Figure 6 for Figure 5 AA section view in;

[0028] Figure 7 It is a structural schematic diagram of an operating member and a first connecting member in an embodiment of the lawn mower of the utility model;

[0029] Figure 8 This is a structural schematic diagram of a locking component in an embodiment of the lawn mower of the utility model;

[0030] Fig. 9 This is a schematic diagram of the structure of the operating components in one embodiment of the lawn mower of the utility model;

[0031] Fig.10 It is a structural schematic diagram of a connecting plate crank in an embodiment of the lawn mower of the utility model;

[0032] Fig.11 It is a structural schematic diagram of a lifting assembly locked in the first position in an embodiment of the lawn mower of the utility model;

[0033] Fig.12 It is a structural schematic diagram of a lifting assembly locked in the second position in an embodiment of the lawn mower of the utility model.

[0034] Component number description

[0035] 100, frame; 200, walking assembly; 300, header assembly; 400, anti-roll cage; 800, battery; 900, lifting assembly; 910, first rotating shaft; 920, second rotating shaft; 921, elastic connector; 930, first connecting member; 931, crank; 9311, first end; 9312, second end; 9313, connecting rod; 932, pull rod; 9321, stopper; 9322, lifting ring; 9323, lifting ear; 940, second connecting member; 950, third connecting member Part; 960, fourth connecting member; 970, connecting rod; 980, operating member; 981, second pedal; 990, locking member; 991, movable part; 9911, connecting plate; 9912, first limiting structure; 9913, second limiting structure; 9914, first pedal; 9915, rotating sleeve; 9916, reinforcing rib; 9917, return spring; 992, limiting part; 9921, fixed bracket; 99211, fixed plate; 9922, limiting shaft; 993, connecting shaft; 9931, shaft shoulder. DETAILED DESCRIPTION

[0036] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0037] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are in accordance with the prior art mastery of those skilled in the art and the description of the present invention, and any prior art methods, equipment and materials similar or equivalent to the methods, equipment and materials in the embodiments of the present invention can also be used to implement the present invention.

[0038] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

[0039] See also Figures 1 to 12 The utility model provides a lawn mower, which includes a lifting component 900 movably mounted on the frame 100, and the lifting component 900 has a first position and a second position that can be locked; when the lifting component 900 is lifted and locked in the second position, the cutting table component 300 can be locked in a higher second position, which is convenient for avoiding obstacles and reducing the impact on the cutting table component 300. At the same time, the lifting component 900 can improve the stability of the fixing of the cutting table component 300 and improve the problem of damage to the cutting table component 300 due to jumping and vibration.

[0040] See also Figure 1 The lawn mower includes: a frame 100, a walking assembly 200, a lifting assembly 900 and a cutting table assembly 300.

[0041] The structural form of the frame 100 is not limited, and reference may be made to the structure of the existing lawn mower frame 100. In order to improve the riding experience of the lawn mower, a riding seat may be provided on the frame 100; in order to improve the problem that the existing lawn mower cannot achieve anti-rollover protection, the frame 100 is also provided with an anti-rollover frame 400 installed next to the riding seat 500. In addition, considering the problem that the anti-rollover frame 400 occupies space, the anti-rollover frame 400 may be configured to be foldable, so that the storage problem can be taken into account to save space; of course, in other embodiments, a riding seat may not be provided and the rider may ride in a standing manner, or the anti-rollover frame 400 may not be provided and the rider may be protected in other ways.

[0042] The walking assembly 200 is installed on the frame 100 and is used to drive the frame 100 to walk. The walking assembly 200 may include components such as a driving unit, a steering unit, and a power supply unit. The power supply unit provides energy for the driving unit. The power supply unit can use a battery 800 or an engine, but is not limited to this. The power supply unit in this embodiment uses a battery 800; the driving unit provides power for the rotation of the walking wheel. The driving unit can be driven by a motor or a motor acceleration and reduction machine, but is not limited to this; the walking assembly 200 performs corresponding walking movements under the control of the operating assembly; there are many control methods for the operating assembly, including manual control, foot control, and hand-foot integration. In one embodiment of the utility model, refer to Figure 1 The control component adopts the control method of joystick plus foot pedal.

[0043] The cutting table assembly 300 is installed on the frame 100 to perform mowing operations to obtain grass of appropriate height. The cutting table assembly 300 can have various structural forms and specifications. Different working environments require different cutting table assemblies 300. Cutting table assemblies 300 of different specifications, such as 48 inches, 52 inches, etc., require different assembly spaces. In one embodiment, the bottom of the frame 100 can adjust the wheelbase of the lawn mower, thereby obtaining different bottom assembly spaces to meet the adaptation needs of different cutting table assemblies 300.

[0044] The lifting assembly 900 includes a locking member 990, and the locking member 990 includes a movable portion 991 and a limiting portion 992. The limiting portion 992 is installed on the frame 100. The mechanism and shape of the limiting portion 992 are not limited, and can be a shaft, plate, rod or other irregularly shaped structure, as long as it can limit the six degrees of freedom of the movable portion 991. The mechanism and shape of the movable portion 991 are not limited, and can be a shaft, plate, rod or other irregularly shaped structure, as long as it can be locked with the limiting portion 992 at a preset position. The header assembly 300 and the movable portion 991 both move with the rotation of the connecting member, and the movable portion 991 can be locked in the first position and the second position by the limiting portion 992.

[0045] The cutting table assembly 300 can move with the movement of the lifting assembly 900, and when the movable part 991 is locked in the first position, the cutting table assembly 300 is locked in the first position, and when the movable part 991 is locked in the second position, the cutting table assembly 300 is locked in the second position, the height of the second position is higher than the first position, and the heights of the first position and the second position are different. During operation, the cutting table assembly 300 can adapt to mowing lawns of different heights. For example, when the lawn is high, the cutting table assembly 300 can be locked in the second position to work, which can replace the existing technology of replacing the cutting table assembly 300 to adapt to different working conditions and improve work efficiency. In addition, during transportation or transfer, when encountering uneven road conditions, the cutting table assembly 300 can be locked in the higher second position to avoid obstacles and reduce the impact on the cutting table assembly 300. At the same time, the lifting assembly 900 can improve the stability of the fixing of the cutting table assembly 300 and improve the problem of damage to the cutting table assembly 300 due to jumping and vibration.

[0046] See also Figure 5 , Figure 6 and Figure 8In an example of the lawn mower of the present utility model, the movable part 991 includes a connecting plate 9911 and a first pedal 9914 connected to the connecting plate 9911, and the first pedal 9914 is located on a side of the connecting plate 9911 away from the frame 100. The setting of the first pedal 9914 facilitates the operation of the movable part 991 by foot.

[0047] See also Fig.11 and Fig.12 In one example of the utility model lawn mower, the connecting plate 9911 includes a first limiting structure 9912 and a second limiting structure 9913 arranged at one end close to the limiting portion 992. The shape of the first limiting structure 9912 is not limited and can be a straight surface, a curved surface, a groove or a combination of multiple surfaces. In this embodiment, the first limiting surface is a straight surface. The first limiting structure 9912 is located on the side of the connecting plate 9911 facing the frame 100. When the first limiting structure 9912 is connected to the limiting portion 992, the movable portion 991 is locked in the first position, and the second limiting structure 9913 is locked in the first position. The shape is not limited and may be a straight surface, a curved surface, a groove or a combination of multiple surfaces. In this embodiment, the second limiting structure 9913 is a curved surface. The second limiting structure 9913 is arranged on the vertical surface of the connecting plate 9911 facing the limiting portion 992. When the second limiting structure 9913 is engaged with the limiting portion 992, the movable portion 991 is locked in the second position. This arrangement can realize the lifting and lowering of the lifting assembly 900 while driving the movable portion 991 to move and complete the locking. Compared with the method of stepping on the pedal with the foot and adjusting the limiting device with the hand in the prior art, it reduces the difficulty of work and saves manpower.

[0048] See also Figure 5 to Figure 6 In an example of the lawn mower of the present utility model, the locking member 990 also includes a connecting shaft 993, and the movable part 991 is connected to the connecting shaft 993, so that multiple parts can be connected through one connecting shaft 993. Furthermore, multiple parts are locked by setting fasteners at both ends of the connecting shaft 993, which reduces the difficulty of assembly and improves the compactness and linkage of the structure.

[0049] See also Figure 5 , Figure 6 and Figure 8In an example of the lawn mower of the present utility model, the rotating sleeve 9915 passes through the connecting plate 9911 and is fixedly connected to the connecting plate 9911. The rotating sleeve 9915 is mounted on the connecting shaft 993. The length of the rotating sleeve 9915 is not limited. The rotating sleeve 9915 can be set to different lengths to adjust and limit the distance between the connecting plate 9911 and other adjacent structures or parts, so as to achieve the effect of allowing other parts to avoid the frame 100. Furthermore, in order to improve the stability of the connection between the connecting plate 9911 and the rotating sleeve 9915, a reinforcing rib 9916 is also provided between the connecting plate 9911 and the rotating sleeve 9915.

[0050] See also Figure 5 to Figure 6 and Figure 11 to Figure 12 In an example of the lawn mower of the utility model, the locking member 990 also includes a return spring 9917, and the return spring 9917 is sleeved on the outside of the rotating sleeve 9915. One end of the return spring 9917 is fixed, and its fixed position is not limited. In this embodiment, it is fixed to the connecting member, and the other end is connected to the connecting plate 9911, specifically, fixed to the reinforcing rib 9916. The return spring 9917 adopts a torsion spring. The torsion spring is used as an elastic element to achieve locking and directional release of the locking member 990 through elastic deformation and energy storage.

[0051] See also Figure 5 and Figure 8 In an example of the lawn mower of the present utility model, the limiting portion 992 includes a limiting shaft 9922 and a fixed bracket 9921 for installing the limiting shaft 9922. The fixed bracket 9921 is fixedly installed on the side of the frame 100 away from the cutting table assembly 300. The fixed bracket 9921 can be in various forms as long as the limiting shaft 9922 can be stably installed.

[0052] See also Figure 5 and Figure 11 to Figure 12 In an example of the lawn mower of the utility model, the fixed bracket 9921 includes two fixed plates 99211 arranged opposite to each other, and the two ends of the limiting shaft 9922 are respectively connected to the two fixed plates 99211. In this embodiment, the first limiting structure 9912 and the second limiting structure 9913 of the connecting plate 9911 are both limited by the limiting portion 992. Further, there is a gap between the limiting shaft 9922 and the frame 100, and the distance between the limiting shaft 9922 and the frame 100 is equal to the distance between the second limiting structure 9913 and the first limiting structure 9912, so that the second limiting structure 9913 and the limiting shaft 9922 can cooperate to achieve locking while limiting the rotation of the connecting plate 9911 through the frame 100.

[0053] See also Figure 4 and Figure 7 In an example of the lawn mower of the utility model, the lifting assembly 900 further includes a connecting member and an operating member 980. The connecting member connects the operating member 980 and the cutting table assembly 300. The operating member 980 drives the cutting table assembly 300 to switch between the first station and the second station through the connecting member. Specifically, the connecting member is rotatably mounted on the frame 100 and connects the cutting table assembly 300 and the movable part 991. The connecting member has various forms, for example, it can be a cam mechanism, a straight plate or a curved plate, etc., all mechanisms or structures that can achieve position change by rotation. The operating member 980 is used to operate the rotation of the connecting member to achieve the position change of the connecting member. The structure and material of the operating member 980 are not limited, and it can be a rod, a plate or a combination of multiple ones, which is suitable for convenient operation.

[0054] See also Figure 4 and Figure 7 In an example of the lawn mower of the utility model, the connecting member includes a crank 931 and a pull rod 932. The crank 931 is hinged to the frame 100. There are many ways of hinge connection, which are not limited to this. For example, the crank 931 can be hinged to the frame 100 through a rotating shaft, and the rotating shaft is rotatably connected to the frame 100 and the crank 931 respectively, or it can be rotatably connected to the frame 100 and fixedly connected to the crank 931, or it can be fixedly connected to the frame 100 and rotatably connected to the crank 931. The crank 931 has a first end 9311 and a second end 9312 away from the hinge, that is, the hinge is located in the middle of the crank 931. The crank 931 can be a straight plate, a curved plate or a plate of other irregular shapes, which is not limited to this.

[0055] Furthermore, the first end 9311 is rotatably connected to the pull rod 932, and the end of the pull rod 932 away from the crank 931 is rotatably connected to the header assembly 300. The above two rotatable connections can ensure that no matter where the first end 9311 rotates to, the pull rod 932 can remain in a vertical state, so as to reduce the torsion of the header assembly 300 on the pull rod 932. The second end 9312 is connected to the connecting shaft 993 to achieve the connection between the crank 931 and the movable part 991. For details, please refer to Figure 6 It should be noted that the number of connecting components is not limited, and can be one, two, three, four or more, and is adaptively designed according to the size and weight of the header assembly 300.

[0056] See also Figures 4 to 7 and Fig. 9In an example of the lawn mower of the present utility model, the operating member 980 is fixedly connected to the crank 931 and connected to the connecting shaft 993. A second pedal 981 is provided at one end of the operating member 980 away from the connecting shaft 993, which can realize the control of the connecting member by stepping on it, so as to improve work efficiency and reduce labor intensity.

[0057] See also Figure 6 In an example of the lawn mower of the utility model, a shoulder 9931 is provided on the connecting shaft 993, the movable portion 991 is provided on one side of the shoulder 9931, and the connecting member and the operating member 980 are provided on the other side of the shoulder 9931. In this embodiment, the rotating sleeve 9915 abuts against one side of the shoulder 9931, and the shoulder 9931 can limit the rotating sleeve 9915 and the crank 931 and facilitate fixation. The crank 931 and the operating member 980 located on the other side of the shoulder 9931 can be provided with any one of them closer to the shoulder 9931, and there is no limitation on this.

[0058] See also Figure 2 In an example of the lawn mower of the present utility model, considering the force balance and stability of the cutting table assembly 300, there are four connecting members, namely a first connecting member 930, a second connecting member 940, a third connecting member 950 and a fourth connecting member 960. Along the first direction, a first rotating shaft 910 and a second rotating shaft 920 arranged in parallel are rotatably connected on one side of the frame 100 close to the cutting table assembly 300. The first connecting member 930 and the second connecting member 940 are arranged opposite to each other and are fixedly connected to the two ends of the first rotating shaft 910 respectively, so that the second connecting member 940 can be raised and lowered synchronously with the first connecting member 930, and only one of the first connecting member 930 or the second connecting member 940 needs to be manipulated. The third connecting member 950 and the fourth connecting member 960 are arranged opposite to each other and are fixedly connected to the two ends of the second rotating shaft 920 respectively, so that the fourth connecting member 960 can be raised and lowered synchronously with the rotation of the third connecting member 950. Only one of the third connecting member 950 or the fourth connecting member 960 needs to be manipulated. Along the second direction, the first connecting member 930 and the third connecting member 950 are arranged in sequence, and the second connecting member 940 and the fourth connecting member 960 are arranged in sequence. It should be noted that the second direction is parallel to the straight direction of the lawn mower. Figure 2 As shown in Y, the first direction is perpendicular to the second direction. Figure 2 As shown in the figure by X.

[0059] See also Figure 4A connecting rod 970 is connected between the first connecting member 930 and the third connecting member 950, one end of the connecting rod 970 is connected to the connecting shaft 993, and the other end is connected to the third connecting member 950. The connecting rod 970 is provided to realize the synchronous rotation of the first connecting member 930 and the third connecting member 950. Only one operating member 980 is provided to control one of the first connecting member 930 and the third connecting member 950, so as to realize the synchronous lifting and lowering of the first connecting member 930, the second connecting member 940, the third connecting member 950 and the fourth connecting member 960.

[0060] See also Figures 5 to 7 In an example of the lawn mower of the present utility model, the end of the operating member 980 away from the second pedal 981 is connected to the first end 9311 of the crank 931 through a connecting rod 9313, and the two ends of the connecting rod 9313 are respectively rotatably connected to the operating member 980 and the crank 931.

[0061] See also Figure 7 In an example of the lawn mower of the present utility model, the pull rod 932 penetrates radially along the connecting rod 9313 and is rotatably connected to the connecting rod 9313. A stopper 9321 is provided at one end of the pull rod 932 away from the cutting table assembly 300. The pull rod 932 is rotatably connected to the connecting rod 9313 by rotating around a rotary axis in the height direction of the lawn mower. A lifting ring 9322 is provided at one end of the pull rod 932 away from the connecting rod 9313. A lifting ear 9323 is provided on the cutting table assembly 300. The lifting ear 9323 is rotatably connected to the lifting ring 9322. The lifting ear 9323 is rotatably connected to the lifting ring 9322 by a rotary motion around a first direction. In order to improve the stability of the connection between the lifting ear 9323 and the lifting ring 9322, a nut and a gasket are provided at the outer end of the lifting ear 9323 to limit the relative movement between the lifting ring 9322 and the lifting ear 9323. The pull rod 932 has two degrees of freedom of rotation in different directions, which enhances the flexibility of the pull rod 932, simplifies the mechanical system structure, and further improves the stability of the header assembly 300. Figures 2 to 3 An elastic connector 921 is provided between the second rotating shaft 920 and the frame 100, and the elastic connector 921 allows the cutting table assembly 300 to be raised and lowered, and can also improve the stability of the cutting table assembly 300. The form of the elastic connector 921 is not limited, and it can be rubber, plastic or spring, etc., which can generate deformation to store energy when subjected to external force, and can release energy after the external force is removed. In this embodiment, two springs are used.

[0062] In an example of the lawn mower of the present utility model, the cutting table assembly 300 is in the first working position. Fig.11, the lifting assembly 900 is locked in the first position. Specifically, the first limiting structure 9912 of the connecting plate 9911 is pressed against the side of the limiting shaft 9922 away from the frame 100 under the action of the dead weight of the header assembly 300, and the connecting plate 9911 is limited from rotating in the direction away from the frame 100 by the torsion force of the torsion spring.

[0063] See also Figures 4 to 10 When the header assembly 300 switches from the first workstation to the second workstation, the second pedal 981 is stepped on, and the operating member 980 and the connecting plate 9911 rotate around the first rotating shaft 910. The connecting shaft 993 and the rotating sleeve 9915, the connecting rod 970, the connecting plate 9911 and the operating member 980 are all rotated around the first rotating shaft 910 with the connecting shaft 993. The rotation can be decomposed into two directions of movement, forward and downward. The first end 9311 drives the entire header assembly 300 to rise through the pull rod 932. At the same time, the first connecting member 930 drives the second connecting member 940 through the first rotating shaft 910, and drives the third connecting member 950 through the connecting rod 970. The third connecting member 950 drives the fourth connecting member 960 through the second rotating shaft 920. The first connecting member 930, the second connecting member 940, the third connecting member 950 and the fourth connecting member 960 work together to drive the entire header assembly 300 to rise. At the same time, the first limiting structure 9912 contacts the limiting shaft 9922 and slides forward with the connecting shaft 993 until the first limiting structure 9912 is disengaged from the limiting shaft 9922, and the elastic potential energy stored in the reset spring 9917 is released, so that the end of the connecting plate 9911 away from the connecting shaft 993 rotates around the connecting shaft 993 toward the frame 100 until the first limiting structure 9912 touches the frame 100 and stops. At this time, the second pedal 981 is released, and the connecting plate 9911 moves toward the limiting shaft 9922 under the dead weight of the cutting table assembly 300 until the second limiting structure 9913 is engaged with the limiting shaft 9922 and stops. At this time, the raising of the cutting table assembly 300 is completed and locked in the second working position, please refer to Fig.12 .

[0064] For further information, see Figures 4 to 10When the cutting table assembly 300 switches from the second workstation to the first workstation, the second pedal 981 is slightly stepped on with the foot, and the operating member 980 and the connecting plate 9911 rotate around the first rotating shaft 910. Similarly, the connecting shaft 993 drives the connecting plate 9911 to move forward along the frame 100. When the second limiting structure 9913 is separated from the limiting shaft 9922, the first pedal 9914 is stepped on with the heel, and the end of the connecting plate 9911 close to the limiting shaft 9922 overcomes the pulling force of the return spring 9917 and moves upward until the first limiting structure 9912 moves to the upper side of the limiting shaft 9922, and the second pedal 981 and the first pedal 9914 are released. Under the action of the deadweight of the cutting table assembly 300, the first limiting structure 9912 slides backward along the limiting shaft 9922 until the lifting assembly 900 is locked in the first position. At this time, the cutting table assembly 300 is locked in the first workstation.

[0065] The utility model lawn mower realizes the control of the lifting and lowering of the cutting table assembly by setting a lifting assembly, and the movable part in the lifting assembly can be locked in the first position and the second position by the limiting part, so that when the movable part is locked in the first position, the cutting table assembly is locked in the first position, and when the movable part is locked in the second position, the cutting table assembly is locked in the second position. Since the height of the second position is higher than the first position, during transportation or transfer, under uneven road conditions, the cutting table assembly can be locked in the higher second position, which is convenient for avoiding obstacles and reducing the impact on the cutting table assembly. At the same time, the lifting assembly can improve the stability of the fixing of the cutting table assembly and improve the problem of damage to the cutting table assembly due to jumping and vibration. In addition, the cutting table assembly has two first and second positions of different heights, which can adapt to the mowing of lawns of different heights and improve work efficiency. Therefore, the utility model effectively overcomes some practical problems in the prior art and has high utilization value and use significance. The above embodiments only illustrate the principle and effect of the utility model, and are not used to limit the utility model. Anyone familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A lawn mower, characterized in that: include: frame; A walking assembly, installed on the frame, and used to drive the frame to walk; A cutting table assembly is installed on the frame to perform mowing operations; A lifting assembly, comprising a locking member, wherein the locking member comprises a movable portion and a limiting portion, wherein the limiting portion is mounted on the frame, the header assembly is connected to the movable portion, and the movable portion can be locked in a first position and a second position by the limiting portion; Wherein, when the movable part is locked in the first position, the header assembly is locked in a first station, and when the movable part is locked in the second position, the header assembly is locked in a second station, and the height of the second station is higher than that of the first station.

2. The lawn mower according to claim 1, characterized in that The movable part comprises a connecting plate and a first pedal connected to the connecting plate, wherein the first pedal is located at a side of the connecting plate away from the frame.

3. The lawn mower according to claim 2, characterized in that The connecting plate includes a first limiting structure arranged at one end close to the limiting portion, the first limiting structure is located on a side of the connecting plate facing the frame, and when the first limiting structure is connected to the limiting portion, the movable portion is locked at the first position.

4. The lawn mower according to claim 2, characterized in that The connecting plate further comprises a second limiting structure, which is arranged on a vertical surface of the connecting plate facing the limiting portion, and when the second limiting structure is engaged with the limiting portion, the movable portion is locked in the second position.

5. The lawn mower according to claim 2, characterized in that: The locking member further comprises a connecting shaft, and the movable portion is mounted on the connecting shaft.

6. The lawn mower according to claim 5, characterized in that The movable part also includes a rotating sleeve, which passes through the connecting plate and is fixedly connected to the connecting plate, and the rotating sleeve is sleeved on the connecting shaft.

7. The lawn mower according to claim 6, characterized in that The locking component also includes a return spring, which is sleeved on the outside of the rotating sleeve. One end of the return spring is fixed, and the other end is connected to the connecting plate.

8. The lawn mower according to claim 1, characterized in that The limiting portion includes a limiting shaft and a fixing bracket for mounting the limiting shaft, and the fixing bracket is fixedly mounted on a side of the frame away from the header assembly.

9. The lawn mower according to claim 8, characterized in that The fixing bracket includes two fixing plates arranged opposite to each other, and the two ends of the limiting shaft are respectively connected to the two fixing plates.

10. The lawn mower according to claim 5, characterized in that The lifting assembly further includes a connecting member and an operating member, wherein the connecting member connects the operating member and the header assembly, and the operating member drives the header assembly to switch between the first workstation and the second workstation through the connecting member.

11. The lawn mower according to claim 10, characterized in that The connecting member includes a crank and a pull rod, the crank is hinged to the frame, the crank has a first end and a second end away from the hinge, the first end is rotatably connected to the pull rod, the end of the pull rod away from the crank is rotatably connected to the header assembly, and the second end is connected to the connecting shaft.

12. The lawn mower according to claim 11, characterized in that The operating member is fixedly connected to the crank and connected to the connecting shaft. A second pedal is provided at one end of the operating member away from the connecting shaft.

13. The lawn mower according to claim 10, characterized in that A shaft shoulder is arranged on the connecting shaft, the movable portion is arranged on one side of the shaft shoulder, and the connecting member and the operating member are arranged on the other side of the shaft shoulder.

14. The lawn mower according to claim 12, characterized in that One end of the operating member away from the second pedal is connected to the first end of the crank via a connecting rod, and the pull rod penetrates the connecting rod in a radial direction and is rotatably connected to the connecting rod.

15. The lawn mower according to claim 14, characterized in that There are four connecting members, namely the first connecting member, the second connecting member, the third connecting member and the fourth connecting member. Along the first direction, a first rotating shaft and a second rotating shaft arranged in parallel are rotatably connected on one side of the frame close to the header assembly. The first connecting member and the second connecting member are arranged opposite to each other and are respectively fixedly connected to the two ends of the first rotating shaft. The third connecting member and the fourth connecting member are arranged opposite to each other and are respectively fixedly connected to the two ends of the second rotating shaft. Along the second direction, the first connecting member and the third connecting member are arranged in sequence, and the second connecting member and the fourth connecting member are arranged in sequence. A connecting rod is connected between the first connecting member and the third connecting member, one end of the connecting rod is connected to the connecting shaft, and the other end is connected to the third connecting member.

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