Electric height adjusting structure and mower

Abstract

The utility model discloses an electric height adjusting structure and a mower. The electric height adjusting structure comprises a connecting rod assembly and an electric assembly; two ends of the connecting rod assembly are respectively connected with a front driving assembly and a rear driving assembly which are arranged at front and rear positions of the frame; and the connecting rod assembly is connected with an electric assembly mounted on the frame through the middle part, so that the connecting rod assembly is driven by the electric assembly to move so as to respectively pull the front driving assembly and the rear driving assembly to change the height relative to the frame. The mowing machine has the advantages that height adjustment is achieved through electric driving, manual bending operation is not needed to adjust the mowing height, height adjustment can be achieved only through forward and reverse toggle of the switch, and the labor intensity can be effectively reduced. And meanwhile, the electronic element is matched for adjusting and positioning, so that the height adjusting precision can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of garden machinery, and in particular to an electric height adjustment structure and a lawn mower. Background Art

[0002] A push lawn mower is a common gardening tool for mechanized lawn mowing. When using a lawn mower to mow the grass, different mowing heights need to be determined for different grass conditions.

[0003] At present, the mowing height adjustment device of the hand-push lawn mower is mostly a four-link structure, and the adjustment method is basically to manually pull the adjustment plate to the height limit. This structure requires manual bending operation, has the disadvantages of low operation efficiency, poor height adjustment accuracy, and discomfort, which will bring a poor user experience and has shortcomings. Utility Model Content

[0004] One of the purposes of the present application is to provide an electric height adjustment structure that can solve at least one defect in the above-mentioned background technology.

[0005] Another object of the present application is to provide a lawn mower that can solve at least one of the defects in the above-mentioned background technology.

[0006] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: an electric height adjustment structure, including a connecting rod assembly and an electric assembly; the connecting rod assembly is respectively connected to a front traveling assembly and a rear traveling assembly arranged at the front and rear positions of a frame; the connecting rod assembly is connected to the electric assembly installed on the frame, so that the connecting rod assembly is displaced under the drive of the electric assembly to respectively pull the front traveling assembly and the rear traveling assembly to change their height relative to the frame.

[0007] Preferably, the output end of the electric component is connected to the connecting rod component via a lifting component; the lifting component is suitable for vertical lifting under the drive of the electric component, thereby driving the connecting rod component to move vertically.

[0008] Preferably, the lifting assembly includes a first hinge plate and a second hinge plate; the first hinge plate and the second hinge plate are cross-arranged and rotatably connected through the middle; the lower end of the first hinge plate and / or the second hinge plate is cooperatively connected with the output end of the electric assembly, and the upper end of the first hinge plate and / or the second hinge plate is cooperatively connected with the connecting rod assembly; the first hinge plate and the second hinge plate are suitable for horizontal movement of the lower ends closer to or farther away under the drive of the electric assembly, thereby increasing or decreasing the vertical height of the upper ends of the first hinge plate and the second hinge plate.

[0009] Preferably, the lower end of the first hinge plate is rotatably connected to the vehicle frame, and the lower end of the second hinge plate is cooperatively connected to the output end of the electric component; the lower end of the second hinge plate is adapted to horizontally move closer to or away from the lower end of the first hinge plate under the drive of the electric component.

[0010] Preferably, the link assembly includes a connecting cross bar, both ends of the connecting cross bar are cooperatively connected to the front traveling assembly and the rear traveling assembly respectively, and the middle part of the connecting cross bar is cooperatively connected to the upper end of the first hinge plate and / or the second hinge plate.

[0011] Preferably, the middle part of the connecting cross bar is hinged to the upper end of the first hinge plate or the second hinge plate.

[0012] Preferably, a traction groove is extendedly provided in the middle part of the connecting cross bar, and the first hinge plate and / or the second hinge plate are in sliding fit with the traction groove through the upper end.

[0013] Preferably, the link assembly includes a front link assembly and a rear link assembly; the first position of the front link assembly is used for connecting and installing the front traveling assembly on the vehicle frame, and the first position of the rear link assembly is used for connecting and installing the rear traveling assembly on the vehicle frame; the second positions of the front link assembly and the rear link assembly are respectively hinged to the upper ends of the first hinge plate and the second hinge plate.

[0014] Preferably, the electric component includes a rotating device, a screw rod and a slider; the rotating device is fixedly provided, the screw rod is installed at the output end of the rotating device, the slider is in threaded fit with the screw rod and is rotatably connected to the lower end of the second hinge plate through one side, and thus the slider drives the lower end of the second hinge plate to horizontally move under the rotation drive of the screw rod.

[0015] Preferably, the output end of the electric component and the link assembly are connected through a lifting assembly; the lifting assembly is adapted to rotate in a vertical plane under the drive of the electric component, and thus drives the link assembly to displace in the circumferential direction of a vertical plane circle.

[0016] Preferably, the electric component includes a rotating device, and the lifting assembly includes a crank and a locking assembly; the first position of the crank is connected to the output end of the rotating device, and the link assembly is cooperatively connected to the second position of the crank; the crank drives the link assembly to rotate in a vertical plane under the drive of the rotating device; and when rotating to a set position, the locking assembly installed at the second position of the crank is adapted to be in locking fit with the vehicle frame.

[0017] Preferably, the connecting rod assembly includes a connecting cross bar, both ends of the connecting cross bar are respectively cooperatively connected with the front traveling assembly and the rear traveling assembly, and the connecting cross bar is cooperatively connected with the second position of the crank through the middle part.

[0018] Preferably, the connecting rod assembly includes a front connecting rod assembly and a rear connecting rod assembly; the first position of the front connecting rod assembly is used for connecting and installing the front traveling assembly on the frame, and the first position of the rear connecting rod assembly is used for connecting and installing the rear traveling assembly on the frame; the second positions of the front connecting rod assembly and the rear connecting rod assembly are respectively hinged to the second position of the crank.

[0019] Preferably, a gear shift plate is installed on one side of the rotating device on the frame, and a plurality of lock holes along the rotation path of the second position of the crank are arranged on the gear shift plate; the locking assembly includes a solenoid valve installed at the second position of the crank and a lock rod installed at the output end of the solenoid valve; when the crank rotates to a set position, the lock rod is adapted to be inserted into the corresponding lock hole; when the crank needs to rotate, the lock rod is separated from the lock hole under the drive of the solenoid valve.

[0020] Preferably, the connecting rod assembly further includes a pair of connecting seats; the connecting seats are rotatably installed on the frame, and the ends of the connecting cross bar and the corresponding wheels are eccentrically installed on the connecting seats.

[0021] Preferably, both the front connecting rod assembly and the rear connecting rod assembly include a connecting seat and a connecting rod; the connecting seats are rotatably installed on the frame, the first position of the connecting rod and the corresponding wheels are eccentrically installed on the connecting seats, and the second position of the connecting rod is cooperatively connected with the electric component; the connecting rod drives the connecting seat to rotate around the installation position under the drive of the electric component to drive the wheels to change in height relative to the frame.

[0022] A lawn mower includes a frame and a front traveling assembly and a rear traveling assembly installed in front of and behind the frame; the front traveling assembly and the rear traveling assembly are cooperatively connected with the frame through the above-mentioned electric height adjustment structure; a control switch for starting the electric component is installed at the handle position of the frame.

[0023] Compared with the prior art, the beneficial effects of the present application are as follows:

[0024] The height adjustment is realized by electric drive, without the need for manual bending operation to adjust the mowing height. Just toggle the switch forward and backward to realize the height adjustment, which can effectively reduce the labor intensity. At the same time, the electronic components are used for adjustment and positioning, which can effectively improve the accuracy of the adjustment height. Description of the Drawings

[0025] Figure 1Schematic diagram of the structure of Embodiment 1 of the present utility model.

[0026] Figure 2 Partial structural schematic diagram of the front and rear traveling components in Embodiment 1 of the present utility model respectively cooperating and connecting with the electric component.

[0027] Figure 3 Exploded state schematic diagram of the lifting component and the electric component in Embodiment 1 of the present utility model.

[0028] Figure 4 Partial state schematic diagram of the lifting component in Embodiment 1 of the present utility model driving one example of the link component to be at the lowest height.

[0029] Figure 5 Partial state schematic diagram of the lifting component in Embodiment 1 of the present utility model driving one example of the link component to increase in height.

[0030] Figure 6 Partial state schematic diagram of the lifting component in Embodiment 1 of the present utility model driving another example of the link component.

[0031] Figure 7 Partial state schematic diagram of the lifting component in Embodiment 1 of the present utility model driving yet another example of the link component.

[0032] Figure 8 Schematic diagram of the structure of Embodiment 2 of the present utility model.

[0033] Figure 9 Partial structural schematic diagram of the front and rear traveling components in Embodiment 2 of the present utility model respectively cooperating and connecting with the electric component.

[0034] Figure 10 Schematic diagram of the structure of the gear shift plate in Embodiment 2 of the present utility model.

[0035] Figure 11 Cooperating structural schematic diagram of the lifting component and the electric component in Embodiment 2 of the present utility model.

[0036] Figure 12 Partial state schematic diagram of the lifting component in Embodiment 2 of the present utility model driving one example of the link component.

[0037] Figure 13 Partial state schematic diagram of the lifting component in Embodiment 2 of the present utility model driving another example of the link component.

[0038] Figure 14 Partial state schematic diagram of the lifting component in Embodiment 2 of the present utility model driving yet another example of the link component.

[0039] In the figure: frame 100, front traveling assembly 110, front wheel 111, front support shaft 112, rear traveling assembly 120, rear wheel 121, rear support shaft 122, gear plate 130, lock hole 131, first travel switch 132, second travel switch 133, front link assembly 21, first connection seat 211, first link 212, rear link assembly 22, second connection seat 221, second link 222, connecting cross bar 200, traction groove 201, lifting assembly 3, rotating shaft 30, first hinge plate 31, second hinge plate 32, lower mounting seat 33, first sliding groove 330, upper mounting seat 34, second sliding groove 340, crank 35, support seat 351, hinge seat 352, solenoid valve 36, lock rod 361, third travel switch 37, electric assembly 4, rotating device 41, screw 42, slider 43. Detailed implementation manners

[0040] Next, in combination with the detailed implementation manners, the present application will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0041] In the description of the present application, it should be noted that for the orientation terms, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and position relationships indicated are based on the orientation or position relationships shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0042] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence.

[0043] The terms "comprising" and "having" and any variations thereof in the description and claims of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0044] One aspect of the present application provides a lawn mower, such as Figure 1 and Figure 8As shown, one preferred embodiment includes a frame 100, a front traveling assembly 110 and a rear traveling assembly 120 installed in front of and behind the frame 100. The front traveling assembly 110 and the rear traveling assembly 120 are cooperated with the frame 100 through an electric height adjustment structure. A control switch (not shown) for starting the electric height adjustment structure is installed at the handle position (not shown) of the frame 100. Thus, when it is necessary to determine different mowing heights according to different grass conditions, only by toggling the control switch forward and backward can the electric height adjustment structure be started to adjust the heights of the front traveling assembly 110 and the rear traveling assembly 120 relative to the frame 100.

[0045] It should be known that the specific structures and working principles of the front traveling assembly 110 and the rear traveling assembly 120 are well-known technologies to those skilled in the art, so a simple description is given here. Generally speaking, as Figure 1 and Figure 2 shown, the front traveling assembly 110 includes a pair of front wheels 111, and the front wheels 111 are symmetrically and rotatably installed on both sides of the front part of the frame 100; the rear traveling assembly 120 includes a pair of rear wheels 121, and the rear wheels 121 are symmetrically and rotatably installed on both sides of the rear part of the frame 100.

[0046] In this application, the electric drive of the electric height adjustment structure is used to replace the traditional manual adjustment. There is no need to bend down to adjust the mowing height. Only by toggling the control switch located at the handle position on the frame 100 can the height be adjusted, thus effectively reducing the labor intensity and improving the mowing efficiency.

[0047] Another aspect of this application provides an electric height adjustment structure. As Figure 2 and Figure 9 shown, one preferred embodiment includes a connecting rod assembly and an electric component 4. The connecting rod assembly can be respectively connected to the front traveling assembly 110 and the rear traveling assembly 120 arranged at the front and rear positions of the frame 100. The connecting rod assembly can also be connected to the electric component 4 installed on one side of the middle part of the frame 100. When adjusting the mowing height, by toggling the control switch, the start of the electric component 4 can be triggered. Furthermore, the connecting rod assembly can be displaced under the drive of the electric component 4. Thus, during the movement of the connecting rod assembly, the front traveling assembly 110 and the rear traveling assembly 120 can be respectively pulled to change their heights relative to the frame 100.

[0048] It should be noted that both the front traveling assembly 110 and the rear traveling assembly 120 are movably mounted on the frame 100 with adjustable positions, and are respectively connected to the electric assembly 4 at different positions of the link assembly. Thus, when adjusting the mowing height, the electric assembly 4 can drive the link assembly to respectively pull the front traveling assembly 110 and the rear traveling assembly 120 to move vertically relative to the frame 100, and then adjust the distance between the front traveling assembly 110 and the rear traveling assembly 120 and the frame 100.

[0049] Specifically, in this embodiment, the electric assembly 4 mainly drives the connection assembly to move, and then the front traveling assembly 110 and the rear traveling assembly 120 connected to the connection assembly will also undergo corresponding position changes to adapt to the movement state of the connection assembly. Furthermore, through a specific installation structure, the movement states of the front link assembly 21 and the rear link assembly 22 can be controlled to change the vertical distance relative to the frame 100 to meet the adjustment requirements of the mowing height.

[0050] In this embodiment, there are various ways for the electric assembly 4 to drive the link assembly. For the convenience of understanding, the following can be illustrated through two specific embodiments. It should be noted that the driving methods include but are not limited to the following two embodiments.

[0051] Embodiment 1:

[0052] The electric assembly 4 drives the connection assembly to move horizontally and / or vertically, and then the connection assembly can respectively pull the front traveling assembly 110 and the rear traveling assembly 120 to adjust the distance relative to the frame 100.

[0053] Specifically, the electric assembly 4 can drive the link assembly to move horizontally to achieve the corresponding distance adjustment. The electric assembly 4 can also drive the link assembly to move vertically to achieve the corresponding distance adjustment. The electric assembly 4 can also drive the link assembly to move horizontally and vertically simultaneously to achieve the corresponding distance adjustment. The link assembly can adopt any one or a combination of two of the above three methods to adjust the distance; the specific selection method can be selected according to the needs of those skilled in the art.

[0054] In this embodiment, as Figures 2 to 7 shown, the output end of the electric assembly 4 is connected to the front link assembly through the lifting assembly 3. The lifting assembly 3 can be lifted in the vertical direction under the drive of the electric assembly 4, and then the link assembly will move in the vertical direction along with the lifting assembly 3, or move in the combined motion of the vertical direction and the horizontal direction along with the lifting assembly 3.

[0055] Specifically, as Figures 3 to 7As shown, the lifting assembly 3 includes a first hinge plate 31 and a second hinge plate 32; the first hinge plate 31 and the second hinge plate 32 are cross - arranged and are rotatably connected to each other by a rotating shaft 30 in the middle. The lower end of the first hinge plate 31 and / or the second hinge plate 32 is cooperatively connected to the output end of the electric assembly 4, and the upper end of the first hinge plate 31 and / or the second hinge plate 32 is cooperatively connected to the link assembly.

[0056] When the electric assembly 4 is triggered to start, the first hinge plate 31 and the second hinge plate 32 can move horizontally closer to or away from each other at the lower end under the drive of the electric assembly 4. Then, the upper ends of the first hinge plate 31 and the second hinge plate 32 will increase or decrease in height vertically, and the link assembly will also move correspondingly with the upper end of the first hinge plate 31 and / or the second hinge plate 32.

[0057] It can be understood that there are mainly two ways for the lower ends of the first hinge plate 31 and the second hinge plate 32 to move horizontally closer to or away from each other under the drive of the electric assembly 4. The first way: the lower ends of the first hinge plate 31 and the second hinge plate 32 move towards or away from each other simultaneously. The second way: one of the hinge plates moves closer to or away from the lower end of the other hinge plate at the lower end under the drive of the electric assembly 4. Both of these ways can meet the requirements of this embodiment. For the convenience of understanding, a specific example of the second way will be described below.

[0058] Specifically, as Figures 3 to 7 shown, the lower end of the first hinge plate 31 is rotatably connected to the vehicle frame 100, and the lower end of the second hinge plate 32 is cooperatively connected to the output end of the electric assembly 4. Thus, the lower end of the second hinge plate 32 can move horizontally closer to or away from the lower end of the first hinge plate 31 under the drive of the electric assembly 4.

[0059] It should be noted that the number of the first hinge plate 31 and the second hinge plate 32 can be one; however, considering the installation position requirements of the first link 212 and the second link 222, the number of the first hinge plate 31 and the second hinge plate 32 can also be multiple. For example Figure 3 shown, both the first hinge plate 31 and the second hinge plate 32 are two symmetrically arranged ones, and the second positions of the first link 212 and the second link 222 are respectively connected to the upper ends of the first hinge plate 31 and the second hinge plate 32 on different sides.

[0060] In this embodiment, there are various specific structures of the link assembly that can be adjusted in mowing height by vertical movement under the drive of the lifting assembly 3, including but not limited to the following two examples.

[0061] Example 1: As Figures 2 to 5As shown in the figure, the connecting rod assembly includes a front connecting rod assembly 21 and a rear connecting rod assembly 22; the first position of the front connecting rod assembly 21 can be used to connect and install the front traveling assembly 110 at the front part of the vehicle frame 100, and the first position of the rear connecting rod assembly 21 can be used to connect and install the rear traveling assembly 120 at the rear part of the vehicle frame 100. The second positions of the front connecting rod assembly 21 and the rear connecting rod assembly 22 are respectively hinged to the upper ends of the first hinge plate 31 and the second hinge plate 32. Thus, when the upper ends of the first hinge plate 31 and the second hinge plate 32 move up and down in the vertical direction, the front traveling assembly 110 and the rear traveling assembly 120 can respectively change their heights relative to the vehicle frame 100 under the traction of the front connecting rod assembly 21 and the rear connecting rod assembly 22.

[0062] Example 2: As Figure 6 and Figure 7 shown in the figure, the connecting rod assembly includes a connecting cross bar 200. The connecting cross bar 200 is cooperatively connected to the front traveling assembly 110 and the rear traveling assembly 120 respectively through its two ends. At the same time, the connecting cross bar 200 can also be cooperatively connected to the upper ends of the first hinge plate 31 and / or the second hinge plate 32 through its middle part. Thus, when the upper ends of the first hinge plate 31 and / or the second hinge plate 32 move up and down in the vertical direction, the front traveling assembly 110 and the rear traveling assembly 120 can respectively change their heights relative to the vehicle frame 100 under the traction of the front connecting rod assembly 21 and the rear connecting rod assembly 22.

[0063] It can be understood that for the above Example 1, the first position and the second position of the front connecting rod assembly 21 and the rear connecting rod assembly 22 can be the two end positions of the front connecting rod assembly 21 and the rear connecting rod assembly 22, or any two positions at arbitrary intervals on the front connecting rod assembly 21 and the rear connecting rod assembly 22 that meet the installation conditions. For the above Example 2, there are various specific ways for the connecting cross bar 200 to cooperate with the lifting assembly 3, including but not limited to the following two specific examples.

[0064] Specific Example 1: As Figure 6 shown in the figure, the connecting cross bar 200 is hinged to the upper end of the first hinge plate 31 or the upper end of the second hinge plate 32 through its middle part. Furthermore, when the upper end of the first hinge plate 31 or the second hinge plate 32 moves up and down in the vertical direction, the connecting cross bar 200 will also move along with the movement of the first hinge plate 31 or the second hinge plate 32 to traction the front traveling assembly 110 and the rear traveling assembly 120 to change their heights relative to the vehicle frame 100.

[0065] It should be known that, as Figure 6As shown, taking the example that the connecting cross bar 200 is hinged to the upper end of the first hinge plate 31 through the middle, the length of the second hinge plate 32 can be equal to that of the first hinge plate 31; of course, the length of the second hinge plate 32 can also be less than that of the first hinge plate 31, so as to reduce or avoid the interference between the first hinge plate 31 and the connecting cross bar 200 during installation.

[0066] It should also be known that if the connecting cross bar 200 is hinged to the upper end of the first hinge plate 31 through the middle, the connecting cross bar 200 can perform a combined horizontal and vertical movement along with the upper end of the first hinge plate 31. If the connecting cross bar 200 is hinged to the upper end of the second hinge plate 32 through the middle, the connecting cross bar 200 can perform a vertical movement along with the upper end of the second hinge plate 32.

[0067] Specific Example 2: As Figure 7 shown, a traction groove 201 is extendedly provided in the middle of the connecting cross bar 200, and the first hinge plate 31 and / or the second hinge plate 32 can be in sliding fit with the traction groove 201 through the upper end.

[0068] It should be known that taking the example that the traction groove 201 is in sliding fit with the upper end of the first hinge plate 31, the upper end of the second hinge plate 32 can be not in contact with the traction groove 201; of course, the upper end of the second hinge plate 32 can also be hinged to the connecting cross bar 200. Thus, when the upper end of the first hinge plate 31 moves up and down in the vertical direction, through the sliding of the upper end of the first hinge plate 31 along the traction groove 201, the connecting cross bar 200 can only perform a vertical lifting movement.

[0069] Taking the example that the traction groove 201 is in sliding fit with the upper ends of both the first hinge plate 31 and the second hinge plate 32 at the same time; as Figure 7 shown, when the upper ends of the first hinge plate 31 and the second hinge plate 32 move up and down in the vertical direction, the upper ends of the first hinge plate 31 and the second hinge plate 32 can slide closer to or away from each other along the traction groove 201, so that the connecting cross bar 200 only performs a lifting movement in the vertical direction.

[0070] In this embodiment, there are various ways to adjust the spacing of the link assembly to respectively pull the front traveling assembly 110 and the rear traveling assembly 120 relative to the vehicle frame 100, including but not limited to the following two.

[0071] The first spacing adjustment method: For the above Example 1, as Figure 2 and Figure 9As shown, the front link assembly 21 includes a first connection seat 211 and a first link 212; the rear link assembly 22 includes a second connection seat 221 and a second link 222. The first connection seat 211 is rotatably mounted on the front side of the frame 100 through a front support shaft 112, and the second connection seat 221 is rotatably mounted on the rear side of the frame 100 through a rear support shaft 122. The first position of the first link 212 and the front wheel 111 are eccentrically mounted on the first connection seat 211, and the second position of the first link 212 cooperates with the electric component 4. The first position of the second link 222 and the rear wheel 121 are eccentrically mounted on the second connection seat 221, and the second position of the second link 222 cooperates with the electric component 4. When the mowing height needs to be adjusted, the first link 212 and the second link 222 are driven by the electric component 4 to respectively pull the first connection seat 211 and the second connection seat 221 to rotate relative to the installation position through the first position. Furthermore, the front wheel 111 and the rear wheel 121 eccentrically mounted on the first connection seat 211 and the second connection seat 221 will move with an increase or decrease in the distance relative to the frame 100.

[0072] For the above Example 2, the link assembly further includes a pair of connection seats, which can be respectively defined as the first connection seat 211 and the second connection seat 221; the first connection seat 211 is rotatably mounted on the front side of the frame 100 through a front support shaft 112, and the second connection seat 221 is rotatably mounted on the rear side of the frame 100 through a rear support shaft 122. The first position of the connecting crossbar 200 and the front wheel 111 are eccentrically mounted on the first connection seat 211, and the second position of the connecting crossbar 200 and the rear wheel 121 are eccentrically mounted on the second connection seat 221.

[0073] It can be understood that since the first connection seat 211 and the second connection seat 221 are rotatably mounted on the frame 100, and the front wheel 111 and the rear wheel 121 are respectively eccentrically mounted on the first connection seat 211 and the second connection seat 221. The function of the first link 212 and the second link 222 or the connecting crossbar 200 is to pull the first connection seat 211 and the second connection seat 221 to rotate relative to the frame 100. Then the installation positions of the corresponding front wheel 111 and rear wheel 121 will change in height in the vertical direction relative to the rotation positions of the first connection seat 211 and the second connection seat 221, that is, the distance between the front wheel 111 and the rear wheel 121 and the frame 100 has changed.

[0074] It should be noted that the first positions and the second positions of the first link 212 and the second link 222 can be the positions at both ends, or any two positions at arbitrary intervals on the first link 212 and the second link 222 that meet the installation conditions. The first position and the second position of the connecting crossbar 200 can be the two ends of the connecting crossbar 200, or any two spaced positions on the connecting crossbar 200 that meet the installation conditions.

[0075] The second method for adjusting the spacing: For the above Example 1, the front wheel 111 is slidably mounted on the front part of the vehicle frame 100 through the front support shaft 112, and the rear wheel 121 is slidably mounted on the rear part of the vehicle frame 100 through the rear support shaft 122. The front link assembly 21 includes the first link 212, and the rear link assembly 22 includes the second link 222; the first position of the first link 212 is rotatably connected to the front support shaft 112, the first position of the second link 222 is rotatably connected to the rear support shaft 122, and the second positions of the first link 212 and the second link 222 are both cooperatively connected to the electric component 4. Furthermore, the first link 212 and the second link 222 will drive the front support shaft 112 and the rear support seat 122 together with the front wheel 111 and the rear wheel 121 to slide along the vehicle frame 100 under the drive of the electric component 4, so as to realize the adjustment of the spacing between the front wheel 111 and the rear wheel 121 relative to the vehicle frame 100.

[0076] For the above Example 2, the front wheel 111 is slidably mounted on the front part of the vehicle frame 100 through the front support shaft 112, and the rear wheel 121 is slidably mounted on the rear part of the vehicle frame 100 through the rear support shaft 122. The connecting crossbar 200 is rotatably connected to the front support shaft 112 and the rear support shaft 122 respectively at both ends. Thus, the connecting crossbar 200 will drive the front support shaft 112 and the rear support seat 122 together with the front wheel 111 and the rear wheel 121 to slide along the vehicle frame 100 under the drive of the electric component 4, so as to realize the adjustment of the spacing between the front wheel 111 and the rear wheel 121 relative to the vehicle frame 100.

[0077] It should be noted that the above two methods for adjusting the spacing can both meet the requirements of this application; for the convenience of description, the following content will take the first method for adjusting the spacing as an example for illustration. At the same time, for the adjustment of the spacing between the front wheel 111 and the rear wheel 121 relative to the vehicle frame 100, it can be in the same direction, that is, the front wheel 111 and the rear wheel 121 are simultaneously spaced apart from or closer to the vehicle frame 100; or it can be in different directions, that is, one of the front wheel 111 and the rear wheel 121 is spaced apart from the vehicle frame 100, and the other is closer to the vehicle frame 100. Based on different requirements for spacing adjustment, in the first method for adjusting the spacing, the first position of the link and the installation position of the corresponding wheel can be coincident or non - coincident.

[0078] For the convenience of installing the first hinge plate 31 and the second hinge plate 32 and the transmission stability, as Figure 3 and Figure 5 shown, the lifting assembly 3 further includes an upper mounting seat 34 and a lower mounting seat 33. The lower mounting seat 33 is fixedly installed on the vehicle frame 100. The lower end of the first hinge plate 31 is hinged to one side of the lower mounting seat 33. A first sliding groove 330 is provided on the other side of the lower mounting seat 33. While the lower end of the second hinge plate 32 is connected to the electric component 4, it can also perform a sliding fit along the first sliding groove 330. One side of the upper mounting seat 34 is hinged to the upper end of the second hinge plate 32. A second sliding groove 340 is provided on the other side of the upper mounting seat 34. While the upper end of the first hinge plate 31 is hinged to the second position of the second connecting rod 222, it can also perform a sliding fit along the second sliding groove 340. Thus, when the lower end of the second hinge plate 32 slides along the first sliding groove 330 under the drive of the electric component 4, the upper mounting seat 34 will perform a vertical movement parallel to the lower mounting seat 33 under the drive of the upper ends of the first hinge plate 31 and the second hinge plate 32.

[0079] In this embodiment, in order to ensure the stability after the spacing between the front traveling assembly 110 and the rear traveling assembly 120 is adjusted relative to the vehicle frame 100, the electric component 4 can not only drive the lower end of the second hinge plate 32 to move horizontally, but also lock the lifting assembly 3 at any stop position. That is, the electric component 4 can achieve self-locking while performing stepless adjustment of the front traveling assembly 110 and the rear traveling assembly 120 relative to the vehicle frame 100. There are various specific structures of the electric component 4 that can implement the above functions, such as adopting a worm and worm gear drive structure, a screw drive structure, and a lead screw drive structure, etc.; considering the requirements of structural strength and design difficulty, it is preferably to adopt a screw drive structure; for the convenience of understanding, the electric component 4 adopting a screw drive structure will be specifically described below.

[0080] Specifically, as Figures 3 to 5 shown, the electric component 4 includes a rotating device 41, a screw 42, and a slider 43. The rotating device 41 is fixedly arranged on the vehicle frame 100 or the lower mounting seat 33; the screw 42 is installed at the output end of the rotating device 41, and the slider 43 is in threaded fit with the screw 42 and is rotationally connected to the lower end of the second hinge plate 32 through one side. Furthermore, the slider 43 drives the lower end of the second hinge plate 32 to move horizontally under the rotational drive of the screw 42.

[0081] It should be noted that by rotatably connecting the lower end of the second hinge plate 32 with the slider 43, the rotation of the slider 43 in the circumferential direction of the screw 42 can be restricted, so that the slider 43 moves axially under the drive of the screw 42. For the rotatable connection between the second hinge plate 32 and the slider 43, a pin shaft can be radially arranged on the side of the slider 43, and the pin shaft drives the first sliding groove 330 to be rotatably connected with the lower end of the second hinge plate 32. It can also be a radial threaded connection between the lower end of the second hinge plate 32 and the side of the slider 43 through a bolt passing through the first sliding groove 330; specifically, the smooth shaft section of the bolt is in fit connection with the first sliding groove 330 and the lower end of the second hinge plate 32.

[0082] It should also be noted that the specific structure and working principle of the rotating device 41 are well-known technologies to those skilled in the art. In this embodiment, a motor is preferably used, and the motor is powered by a storage battery (not shown), and the storage battery is installed in the vehicle frame 100.

[0083] Embodiment Two:

[0084] The difference between Embodiment Two and Embodiment One is that as Figures 8 to 14 shown, the output end of the electric component 4 is connected to the link component through the lifting component 3. The lifting component 3 can rotate in the vertical plane under the drive of the electric component 4, so as to drive the link component to perform displacement in the circumferential direction of the vertical plane.

[0085] Specifically, as Figures 11 to 14 shown, the electric component 4 includes a rotating device 41, and the lifting component 3 includes a crank 35 and a locking component. The first position of the crank 35 is connected to the output end of the rotating device 41, and the link component is cooperatively connected to the second position of the crank 35 away from the first position. The crank 35 drives the link component to rotate in the vertical plane under the drive of the rotating device 41. When the link component rotates to the set position, the locking component installed at the second position of the crank 35 can be locked and cooperated with the vehicle frame 100, so as to ensure the stability of the distance adjustment between the front traveling component 110 and the rear traveling component 120 being towed relative to the vehicle frame 100.

[0086] It should be noted that the first position and the second position of the crank 35 can be respectively the two ends of the crank 35; the first position and the second position of the crank 35 can also be respectively two positions spaced apart on the upper and lower parts of the crank 35.

[0087] In this embodiment, there are various specific structures of the link component that can adjust the mowing height by rotating in the vertical plane under the drive of the lifting component 3, including but not limited to the following two examples.

[0088] Example One: As Figure 9 、 Figure 11 andFigure 12 As shown in the figure, the connecting rod assembly includes a front connecting rod assembly 21 and a rear connecting rod assembly 22. The first position of the front connecting rod assembly 21 can be used to connect and mount the front traveling assembly 110 at the front part of the vehicle frame 100, and the first position of the rear connecting rod assembly 21 can be used to connect and mount the rear traveling assembly 120 at the rear part of the vehicle frame 100. The second positions of the front connecting rod assembly 21 and the rear connecting rod assembly 22 are both hinged to the second position of the crank 35. Thus, when the crank 35 rotates in the vertical plane driven by the rotating device 41, the front traveling assembly 110 and the rear traveling assembly 120 can respectively change their heights relative to the vehicle frame 100 under the traction of the front connecting rod assembly 21 and the rear connecting rod assembly 22.

[0089] It can be understood that the specific structures of the front connecting rod assembly 21 and the rear connecting rod assembly 22 can refer to the foregoing Embodiment 1; and the second positions of the first connecting rod 212 and the second connecting rod 222 are both hinged to the crank 35.

[0090] Example 2: As Figure 13 and Figure 14 shown in the figure, the connecting rod assembly includes a connecting cross bar 200. The connecting cross bar 200 is cooperatively connected to the front traveling assembly 110 and the rear traveling assembly 120 respectively through its two ends. At the same time, the connecting cross bar 200 can also be cooperatively connected to the second position of the crank 35 through its middle part. Thus, when the crank 35 rotates in the vertical plane driven by the rotating device 41, the front traveling assembly 110 and the rear traveling assembly 120 can change their heights relative to the vehicle frame 100 under the traction of the connecting cross bar 200.

[0091] It can be understood that for the above Example 2, as Figure 13 shown in the figure, the cooperative connection manner between the connecting cross bar 200 and the second position of the crank 35 is generally hinged. Thus, when the crank 35 rotates in the vertical plane, the connecting cross bar 200 will also rotate in the vertical plane with the crank 35 to traction the front traveling assembly 110 and the rear traveling assembly 120 to change their heights relative to the vehicle frame 100. Of course, the cooperative connection manner between the connecting cross bar 200 and the second position of the crank 35 can also adopt a sliding fit; as Figure 14 shown in the figure, a traction groove 201 is extendedly provided in the middle part of the connecting cross bar 200, and the crank 35 can be slidably fitted with the traction groove 201 through its second position. Thus, when the crank 35 rotates in the vertical plane, the connecting cross bar 200 will move vertically with the crank 35 to traction the front traveling assembly 110 and the rear traveling assembly 120 to change their heights relative to the vehicle frame 100. That is, the freedom of movement of the connecting cross bar 200 in the horizontal direction needs to be restricted by the vehicle frame 100, so that the connecting cross bar 200 can have a definite vertical movement path driven by the crank 35.

[0092] In this embodiment, there are multiple specific structures of the locking assembly that can achieve locking, one of which is as follows: Figures 10 to 14 As shown, the frame 100 is provided with a shift plate 130 on one side of the rotating device 41, and a plurality of lock holes 131 are provided on the shift plate 130 along the rotation path of the second position of the crank 35. The locking assembly includes a solenoid valve 36 installed at the second position of the crank 35 and a lock rod 361 installed at the output end of the solenoid valve 36; the solenoid valve 36 can drive the lock rod 361 at the output end to move horizontally under the control of power on and off. Thus, when the crank 35 rotates to the set position, the solenoid valve 36 can be powered off, and then the lock rod 361 is plugged into the corresponding lock hole 131 in a natural state to complete the locking; when the crank 35 needs to rotate, the solenoid valve 36 is powered on, and then the lock rod 361 is separated from the lock hole 131 under the adsorption of magnetic force to release the lock.

[0093] It should be known that the multiple lock holes 131 provided on the shift plate 130 are equivalent to the multi-stage adjustment setting for adjusting the spacing between the front travel component 110 and the rear travel component 120 relative to the frame 100. The specific number of the lock holes 131 can be selected according to actual needs. The spacing distances of the multiple lock holes 131 along the rotation path of the second position of the crank 35 can be equal spacing or non-equal spacing, which can be selected according to actual needs; for example Figure 8 As shown, there are seven locking holes 131 arranged on the shift plate 130 , and the intervals between the seven locking holes 131 along the clockwise rotation path of the crank 35 at the second position gradually increase.

[0094] It is understandable that the specific structure and working principle of the solenoid valve 36 are well known to those skilled in the art. In this embodiment, the solenoid valve 36 is in a natural locking state when the power is off, that is, the solenoid valve 36 can move away from the lock hole 131 by magnetic attraction of the lock rod 361 when the power is on. Specifically, after receiving the signal for adjusting the mowing height, the solenoid valve 36 is energized, so that the lock rod 361 is separated from the current lock hole 131 under the action of the magnetic force, and then the rotating device 41 is started to drive the crank 35 to rotate. After the set time of the rotation device 41 starting, the solenoid valve 36 can be de-energized, and then the lock rod 361 can be reset. At this time, the lock rod 361 may not be aligned with the lock hole 131, but can be against the shift plate 130; when the rotating device 41 drives the crank 35 to rotate to align with the next lock hole 131, the lock rod 361 can be automatically inserted to lock.

[0095] In this embodiment, Figure 11As shown in the figure, the solenoid valve 36 is installed on the support base 351 fixed to one side of the crank 35, and the locking rod 361 penetrates through the entire solenoid valve 36. To ensure the stable power-off time of the solenoid valve 36, a third travel switch 37 can be installed on the support base 351, and the third travel switch 37 is spaced from the side of the solenoid valve 36 away from the output end. Thus, when the solenoid valve 36 is energized to drive the locking rod 361 to retract until the end of the locking rod 361 away from the locking hole 131 contacts the third travel switch 37, the solenoid valve 36 will be powered off after a set time, such as 500 ms later. At the same time, the rotating device 41 is started to drive the crank 35 to rotate; that is, 500 ms after the rotating device 41 is started, the solenoid valve 36 is powered off. At this time, the locking rod 361 at the output end of the solenoid valve 36 abuts against the end face of the gear plate 130 and is not fully reset, and further the power-off switch of the solenoid valve 36 is still in the triggered state. When the rotating device 36 drives the crank 35 to rotate to the corresponding next locking hole 131, the locking rod 361 is automatically inserted and reset; at the same time, the power-off switch of the solenoid valve 36 is disconnected, and the rotating device 41 also stops operating.

[0096] In this embodiment, as Figure 10 , Figures 12 to 14 shown, to ensure the stability of multi-stage adjustment, a first travel switch 132 and a second travel switch 133 can be respectively installed on the side parts of the locking holes 131 corresponding to both ends of the rotation path of the crank 35 at the second position. Thus, when the crank 35 drives the solenoid valve 36 to rotate to two extreme positions, through the contact between the locking rod 361 at the output end of the solenoid valve 36 and the first travel switch 132 or the second travel switch 133, the rotation of the crank 35 is always controlled to rotate along the path between the first travel switch 132 and the second travel switch 133.

[0097] In this embodiment, for the above Example 1, the hinge positions of the second positions of the first connecting rod 212 and the second connecting rod 222 with the crank 35 can coincide with each other or not coincide with each other. At the same time, the hinge positions of the second positions of the first connecting rod 212 and / or the second connecting rod 222 can coincide with the axis of the locking rod 361 or not coincide. For example Figure 11 and Figure 12 shown, the first connecting rod 212 and the second connecting rod 222 are jointly hinged and installed on the hinge seat 352 provided at the second position of the crank 35; that is, the first connecting rod 212 and the second connecting rod 222 are successively hinged and installed on the hinge seat 352 of the crank 35; the hinge seat 352 can be located above or below the locking rod 361.

[0098] For the above Example 2, the matching position of the middle part of the connecting cross bar 200 with the crank 35 can coincide with the axis of the locking rod 361 or not coincide. For example Figure 11 , Figure 13 and Figure 14As shown, the crank 35 is hinged or slidably engaged with the middle part of the connecting cross bar 200 through the hinge seat 352 provided at the second position; the hinge seat 352 can be located above or below the locking bar 361.

[0099] The basic principle, main features and advantages of the present application have been described above. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements will occur to the present application, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. An electric height adjustment structure, characterized in that: include: Connecting rod assembly; The connecting rod assembly is respectively connected to the front travel assembly and the rear travel assembly which are arranged at the front and rear positions of the frame; as well as The connecting rod assembly is connected to the electric assembly mounted on the frame, so that the connecting rod assembly is displaced under the drive of the electric assembly to respectively pull the front travel assembly and the rear travel assembly to change the height relative to the frame.

2. The electric height adjustment structure according to claim 1, characterized in that: The output end of the electric assembly is connected to the connecting rod assembly via a lifting assembly; The lifting assembly is suitable for lifting and lowering in the vertical direction under the drive of the electric assembly, thereby driving the connecting rod assembly to move in the vertical direction.

3. The electric height adjustment structure according to claim 2, characterized in that: The lifting assembly includes a first hinge plate and a second hinge plate; The first hinge plate and the second hinge plate are cross-arranged and rotatably connected through the middle; the lower end of the first hinge plate and / or the second hinge plate is cooperatively connected with the output end of the electric component, and the upper end of the first hinge plate and / or the second hinge plate is cooperatively connected with the connecting rod component; The first hinge plate and the second hinge plate are suitable for horizontally moving the lower ends closer or farther under the drive of the electric assembly, thereby increasing or decreasing the upper ends of the first hinge plate and the second hinge plate vertically.

4. The electric height adjustment structure according to claim 3, characterized in that: The lower end of the first hinged plate is rotatably connected to the vehicle frame, and the lower end of the second hinged plate is cooperatively connected to the output end of the electric component; The lower end of the second hinge plate is suitable for horizontally moving toward or away from the lower end of the first hinge plate under the driving of the electric assembly.

5. The electric height adjustment structure according to claim 4, characterized in that: The connecting rod assembly includes a connecting cross bar, the two ends of which are respectively connected to the front travel assembly and the rear travel assembly, and the connecting cross bar is connected to the upper end of the first hinge plate and / or the second hinge plate through the middle.

6. The electric height adjustment structure according to claim 5, characterized in that: The connecting cross bar is hinged to the upper end of the first hinge plate or the second hinge plate through the middle portion.

7. The electric height adjustment structure according to claim 6, characterized in that: A traction groove is extended from the middle of the connecting cross bar, and the first hinge plate and / or the second hinge plate are slidably matched with the traction groove through the upper end.

8. The electric height adjustment structure according to claim 4, characterized in that: The connecting rod assembly includes a front connecting rod assembly and a rear connecting rod assembly; The first position of the front link assembly is used to connect to the front traveling assembly installed on the frame, and the first position of the rear link assembly is used to connect to the rear traveling assembly installed on the frame; the second positions of the front link assembly and the rear link assembly are respectively hinged to the upper ends of the first hinge plate and the second hinge plate.

9. The electric height adjustment structure according to any one of claims 4 to 8, characterized in that: The electric component comprises: A rotating device; the rotating device is fixedly arranged; A screw rod; the screw rod is mounted on the output end of the rotating device; and The slider is threadedly engaged with the screw and is rotationally connected to the lower end of the second hinge plate through one side, so that the slider drives the lower end of the second hinge plate to move horizontally under the rotation drive of the screw.

10. The electric height adjustment structure according to claim 1, characterized in that: The output end of the electric assembly is connected to the connecting rod assembly via a lifting assembly; The lifting assembly is suitable for rotating in a vertical plane under the drive of the electric assembly, thereby driving the connecting rod assembly to move in a circumferential direction of the vertical plane.

11. The electric height adjustment structure according to claim 10, characterized in that: The electric assembly includes a rotating device, and the lifting assembly includes a crank and a locking assembly; The first position of the crank is connected to the output end of the rotating device, and the connecting rod assembly is cooperatively connected to the second position of the crank; The crank drives the connecting rod assembly to rotate in a vertical plane under the drive of the rotating device; and when rotating to a set position, the locking assembly installed at the second position of the crank is suitable for locking with the frame.

12. The electric height adjustment structure according to claim 11, characterized in that: The connecting rod assembly includes a connecting cross bar, the two ends of which are respectively connected to the front travel assembly and the rear travel assembly, and the connecting cross bar is connected to the second position of the crank through the middle.

13. The electric height adjustment structure according to claim 11, characterized in that: The connecting rod assembly includes a front connecting rod assembly and a rear connecting rod assembly; The first position of the front connecting rod assembly is used to connect the front traveling assembly installed on the frame, and the first position of the rear connecting rod assembly is used to connect the rear traveling assembly installed on the frame; the second positions of the front connecting rod assembly and the rear connecting rod assembly are respectively hinged to the second position of the crank.

14. The electric height adjustment structure according to any one of claims 11 to 13, characterized in that: The frame is provided with a shift plate on one side of the rotating device, and the shift plate is provided with a plurality of lock holes along the rotation path of the second position of the crank; the locking assembly comprises a solenoid valve installed at the second position of the crank and a lock rod installed at the output end of the solenoid valve; When the crank rotates to a set position, the locking rod is adapted to be plugged into the corresponding locking hole; when the crank needs to be rotated, the locking rod is disengaged from the locking hole under the drive of the solenoid valve.

15. The electric height adjustment structure according to claim 5 or 12, characterized in that: The connecting rod assembly also includes a pair of connecting seats; the connecting seats are rotatably mounted on the frame, and the ends of the connecting crossbar and the corresponding wheels are eccentrically mounted on the connecting seats.

16. The electric height adjustment structure according to claim 8 or 13, characterized in that: The front connecting rod assembly and the rear connecting rod assembly both include a connecting seat and a connecting rod; The connecting seat is rotatably mounted on the vehicle frame, the first position of the connecting rod and the corresponding wheel are eccentrically mounted on the connecting seat, and the second position of the connecting rod is cooperatively connected with the electric assembly; The connecting rod drives the connecting seat to rotate around the installation position under the driving of the electric component to drive the wheel to change its height relative to the frame.

17. A lawn mower, comprising a frame and a front travel assembly and a rear travel assembly mounted at the front and rear of the frame; characterized in that: The front traveling assembly and the rear traveling assembly cooperate with the frame through the electric height adjustment structure described in any one of claims 1 to 16; a control switch for starting the electric assembly is installed at the handle position of the frame.

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