Working component lifting device and gardening tool

Abstract

The present invention provides a working component lifting device and a garden tool. The working component lifting device includes a pedal assembly and a connecting assembly for connecting the pedal assembly and the working component, the pedal assembly includes a pedal mechanism and a locking mechanism for limiting the locking position of the pedal mechanism, and the pedal mechanism can drive the working component to switch between a first position and a second position through the connecting assembly; the working component lifting device also includes an adjustment assembly, which is connected between the pedal assembly and the connecting assembly to adjust the height of the second position of the working component. The working component lifting device of the present invention can conveniently and quickly complete the adjustment of the first position and the second position of the working component through the reasonable cooperation of the connecting rod and the clamping structure; at the same time, the working component lifting device has a simple structure, low manufacturing cost, and is easy to install. It can be applied to a variety of garden tools, effectively improving the practicality of the garden tools using the working component lifting device.

Description

Technical Field

[0001] The invention relates to a working component lifting device, in particular to a working component lifting device suitable for gardening tools. Background Art

[0002] At present, garden maintenance work is mostly performed by using various tools and / or machines, and the garden tools and / or machines are configured into various structures to perform corresponding maintenance tasks. In fact, for garden tools for ground operation, since their working components are usually located below the tool machine, the working height of the working components often needs to be adjusted according to work needs.

[0003] In the prior art, the working height of the working component is usually adjusted by a height adjustment mechanism. However, during use, the height adjustment structure in the prior art needs to adjust the limit height of the working component by hand while stepping on the height adjustment pedal with the foot. In this way, the operator must use both hands and feet to complete the height adjustment operation of the working component, resulting in the height adjustment structure in the prior art having the defect of easily causing operator fatigue, which affects the safety of the use of garden tools.

[0004] In view of this, it is necessary to improve the height adjustment structure of existing garden tools to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a working component lifting device, which can conveniently and quickly complete the adjustment of the first position and the second position of the working component through the reasonable cooperation of the connecting rod and the clamping structure; at the same time, the working component lifting device has a simple structure, low manufacturing cost, simple and convenient installation, can be applied to a variety of garden tools, and effectively improves the practicality of the garden tools using the working component lifting device.

[0006] To achieve the above-mentioned purpose of the invention, the present invention provides a working component lifting device, including a pedal assembly and a connecting assembly for connecting the pedal assembly and the working component, the pedal assembly includes a pedal mechanism and a locking mechanism for limiting the locking position of the pedal mechanism, and the pedal mechanism can drive the working component to switch between a first position and a second position through the connecting assembly; the working component lifting device also includes an adjusting assembly, which is connected between the pedal assembly and the connecting assembly to adjust the height of the second position of the working component.

[0007] As a further improvement of the present invention, the adjustment assembly includes an adjustment rod connected to the pedal mechanism, an adjustment plate corresponding to the adjustment rod, and a positioning member detachably connected to the adjustment plate for limiting the relative position of the adjustment rod and the adjustment plate.

[0008] As a further improvement of the present invention, the adjusting rod comprises a fixed end rotatably fixed to the pedal mechanism and a free end arranged opposite to the fixed end, and the free end is provided with a clamping portion arranged corresponding to the positioning member.

[0009] As a further improvement of the present invention, the engaging portion is arranged in a stepped shape, including a plurality of staggered step surfaces.

[0010] As a further improvement of the present invention, the adjustment plate is provided with a positioning portion for fixing the installation position of the adjustment plate, and the adjustment plate is provided with a plurality of adjustment holes arranged in a row, and the positioning piece is clamped and accommodated in the adjustment hole to abut against the clamping portion.

[0011] As a further improvement of the present invention, the adjustment holes are arranged in multiple rows in parallel, and the multiple rows of adjustment holes are arranged in an inclined matrix.

[0012] As a further improvement of the present invention, the pedal mechanism includes a pedal bracket and a pedal body connected to the pedal bracket, one end of the pedal body is rotatably connected to the pedal bracket via a return spring, and the other end is provided with a clamping portion corresponding to the locking mechanism, and the locking mechanism is provided with a clamping protrusion corresponding to the clamping portion.

[0013] As a further improvement of the present invention, the connecting assembly includes a transverse rotation axis and a connecting mechanism connected at both ends of the transverse rotation axis, and the pedal mechanism is connected to one end of the transverse rotation axis to drive the working assembly connected to the connecting mechanism to move while driving the transverse rotation axis to rotate.

[0014] As a further improvement of the present invention, the working component lifting device also includes a power-assisting component, which is connected to the transverse rotation axis, and the power-assisting component and the pedal mechanism are respectively arranged on both sides of the radial direction of the transverse rotation axis to assist the pedal mechanism in driving the transverse rotation axis to rotate.

[0015] As a further improvement of the present invention, the working component lifting device includes at least two groups of the connecting components, and two adjacent groups of the connecting components are connected through an arc-shaped connecting rod transmission.

[0016] To achieve the above-mentioned purpose of the invention, the present invention also provides a garden tool, including a base, an operating device and a working component fixed on the base, and a lifting device for controlling the second and third positions of the working component, the lifting device is the aforementioned working component lifting device, the pedal assembly is fixedly installed on the base, the connecting assembly is arranged in two groups in parallel, the two groups of connecting assemblies are connected by at least one arc-shaped connecting rod, and the pedal assembly is connected to the connecting assembly located in front of the running direction of the garden tool.

[0017] The beneficial effects of the present invention are as follows: the working component lifting device of the present invention, by providing a pedal assembly composed of a clamping structure and a connecting assembly mechanically connected to the pedal assembly, enables the pedal mechanism to switch between a locked position and a free position, and the switching and adjustment of the first position and the second position of the working component can be completed without simultaneously controlling the pedal mechanism and the adjustment mechanism, thereby effectively improving the ease of use and safety of the working component lifting device, and the working component lifting device has a simple structure and is simple and convenient to install, thereby reducing the manufacturing cost of the working component lifting device and the gardening tool using the working component lifting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the combined structure of the working component lifting device and the working component of the present invention.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the lifting device of the working component in the figure.

[0020] Figure 3 for Figure 1 Exploded diagram of the middle pedal mechanism.

[0021] Figure 4 for Figure 1 Exploded diagram of the connected components.

[0022] Figures 5a to 5e for Figure 1 Schematic diagram of the coordination between the middle pedal mechanism and the adjustment mechanism.

[0023] Figure 6 It is a schematic diagram of the combined structure of the working component lifting device and the working component in another embodiment of the present invention.

[0024] Figure 7 It is a structural schematic diagram of the garden tool of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] See also Figure 1 As shown, a working component lifting device 100 provided by the present invention includes a pedal component 1, a connecting component 2 for connecting the pedal component 1 and the working component 200, and an adjusting component connected between the pedal component 1 and the connecting component 2.

[0027] See also Figure 1 to Figure 3As shown, the pedal assembly 1 includes a pedal mechanism 11 and a locking mechanism 12 for limiting the locking position of the pedal mechanism 11. The pedal mechanism 11 includes a pedal body 111 and a pedal bracket 112 for supporting the pedal body 111. In the present invention, one end of the pedal body 111 is rotatably connected to the end of the pedal bracket 112 through a rotating shaft 113; and the other end is provided with a clamping portion 114 corresponding to the locking mechanism 12.

[0028] In a preferred embodiment of the present invention, the clamping portion 114 and the pedal body 111 are separately provided, and a groove 1111 corresponding to the clamping portion 114 is provided on the pedal body 111, and the groove 1111 is formed by being recessed inward from the edge of the pedal body 111. Of course, in other embodiments of the present invention, the clamping portion 114 can also be integrally formed with the pedal body 111, and it is only necessary to ensure that the locking mechanism 12 and the pedal mechanism 11 are firmly clamped.

[0029] The pedal bracket 112 is provided with a limiting arm 115 for limiting the rotation direction of the pedal body 111. The pedal body 111 is rotatably connected to the end of the limiting arm 115 in the extension direction. The end of the limiting arm 115 is also provided with an inclined guide surface 1151 for limiting the rotation angle of the pedal body 111. The angle between the extension direction of the limiting arm 115 and the extension direction of the inclined guide surface 1151 is α. With such a configuration, when the pedal body 111 rotates around the rotating shaft 113 and abuts against the inclined guide surface 1151, an angle α is formed between the pedal body 111 and the limiting arm 115. Preferably, the angle α=12°.

[0030] Furthermore, a reset spring 116 is provided between the pedal body 111 and the pedal bracket 112 in the present invention. The reset spring 116 is sleeved on the rotating shaft 113 to reset the connection between the pedal body 111 and the pedal bracket 112. In this way, when the pedal body 111 is stepped on, the pedal body 111 compresses the reset spring 116 to form an angle α between the pedal body 111 and the limiting arm 115. When the external force is removed, the pedal body 111 rotates under the action of the restoring force of the reset spring 116 and is re-held on the limiting arm 115, so that the holding portion 114 is held on the locking mechanism 12 / detached from the self-locking mechanism 12.

[0031] The locking mechanism 12 includes a retaining portion 121 and an extending portion 122 extending outward from the retaining portion 121, and the extending portion 122 is provided with a retaining protrusion 123 corresponding to the retaining portion 114, and when the pedal mechanism 11 is positioned at the locking position, the retaining protrusion 123 passes through the groove 1111 and is retained on the retaining portion 114 to limit the position of the pedal mechanism 11.

[0032] The connecting assembly 2 is connected to the working assembly 200 and the pedal assembly 1 respectively, so that the pedal assembly 1 can drive the working assembly 200 to move through the connecting assembly 2. Specifically, it is defined that when the pedal mechanism 11 is positioned at the locking position through the locking mechanism 12, the working assembly 200 is in the first position; when the pedal mechanism 11 is disengaged from the locking mechanism 12, the working assembly 200 is in the second position; then the pedal mechanism 11 can drive the working assembly 200 to switch between the first position and the second position through the connecting assembly 2.

[0033] In the present invention, the connecting assembly 2 includes a transverse rotation axis 21 and a connecting mechanism 22 connected at both ends of the transverse rotation axis 21. The pedal mechanism 11 is fixedly connected to one end of the transverse rotation axis 21 through a pedal bracket 112, so that the transverse rotation axis 21 rotates driven by the pedal mechanism 11, and further drives the connecting mechanism 22 connected at both ends of the transverse rotation axis 21 to move around the transverse rotation axis 21.

[0034] Furthermore, the connecting mechanism 22 includes a fixing portion 221 for fixing the connecting mechanism 22 on the transverse axis 21 and a connecting rod 222 rotatably connected to the fixing portion 221. In a preferred embodiment of the present invention, the fixing portion 221 is a pair of splints, and the connecting rod 222 is rotatably fixed between the pair of splints through a connecting shaft 223. Such a configuration can facilitate the installation and replacement of the connecting rod 222 on the one hand, and can make the length of the connecting rod 222 adjustable on the other hand, so as to facilitate adjusting the height of the first position of the working component 200 by adjusting the length of the connecting rod 222.

[0035] Of course, in other embodiments of the present invention, the fixing portion 221 may also be other structures for connecting the connecting rod 222 and the transverse axis 21, and the connecting rod 222 may also be replaced by other structures for connecting the fixing portion 221 and the working component 200. It is only necessary to ensure that the connection between the connecting rod 222 and the connecting plate 213, and the fixing portion 221 and the working component 200 is firm.

[0036] See also Figure 4 Combined with Figure 1 and Figure 2 As shown, the working component lifting device 100 also includes an adjusting component 3 connected between the pedal component 1 and the connecting component 2. The adjusting component 3 is used to adjust the height of the second position of the working component 200, and includes an adjusting rod 31 connected to the pedal mechanism 11, an adjusting plate 32 corresponding to the adjusting rod 31, and a positioning member 33 detachably connected to the adjusting plate 32 for limiting the relative position of the adjusting rod 31 and the adjusting plate 32.

[0037] In the present invention, the adjustment rod 31 includes a fixed end (unnumbered) rotatably fixed to the pedal bracket 112 via a fixed shaft 310 and a free end (unnumbered) arranged opposite to the fixed end, and the free end is provided with a snap-fitting portion 311 arranged corresponding to the positioning member 33.

[0038] The adjusting plate 32 is provided with a positioning portion 321 for fixing the adjusting plate 32 in the use position. Furthermore, the adjusting plate 32 is also provided with a plurality of adjusting holes 322 arranged in a row. The positioning member 33 is clamped and accommodated in the adjusting hole 322 so that the clamping portion 311 can be held on the positioning member 33 and define the relative position of the adjusting rod 31 and the adjusting plate 32, and further define the height of the second position of the working assembly 200. In this way, when the working terrain of the working assembly 200 is uneven and the working assembly 200 is moved upward as a whole by collision with the ground or other objects, the adjusting rod 31 can slide to the side away from the positioning member 33, and when the working assembly 200 is under the action of gravity, the clamping portion 311 of the adjusting rod 31 re-matches with the positioning member 33, thereby fixing the height of the second position of the working assembly 200, effectively preventing the working assembly 200 from rigidly bumping against the ground or other objects during use or movement, so as to ensure the service life of the working assembly 200.

[0039] Preferably, each adjustment hole 322 is provided with a limiting groove 323, and the positioning member 33 is provided with a limiting protrusion 331 corresponding to the limiting groove 323. Such a configuration can effectively limit the protruding height of the positioning member 33 in the adjustment hole 322 and prevent the positioning member 33 and the adjustment hole 322 from relative rotation, thereby further ensuring the stable engagement between the engaging portion 311 and the positioning member 33.

[0040] Furthermore, a ruler is marked on the side of each adjustment hole 322 to indicate the height of the second position of the working component 200 (i.e., the working height of the working component 200) when the adjustment rod 31 is against the positioning piece 33 in the corresponding adjustment hole 322, further facilitating the operator to select and adjust the height of the second position of the working component 200.

[0041] In a preferred embodiment of the present invention, two adjustment plates 32 are arranged in parallel, and multiple rows of adjustment holes 322 on each adjustment plate 32 are arranged in parallel. The multiple rows of adjustment holes 322 are arranged in an inclined matrix. Further, the adjustment holes 322 on the two adjustment plates 22 are arranged one by one, and in this embodiment, the adjustment rod 31 is accommodated between the two adjustment plates 32 and can be supported on the positioning member 33 that passes through the two adjustment plates 32 at the same time. Further, the engaging portion 311 is arranged in a stepped shape, including multiple staggered step surfaces 312, and the number of step surfaces 312 corresponds to the number of columns of the adjustment holes 322. Such an arrangement, on the one hand, can effectively prevent the positioning member 33 from being deformed when the adjustment rod 31 is supported on the positioning member 33, thereby effectively improving the safety of the working component lifting device 100; on the other hand, while ensuring the stable engagement between the adjustment rod 31 and the positioning member 33, more options are provided for the height adjustment of the working component 200.

[0042] In particular, the adjustment component 3 also includes a connecting rope 34, and the positioning member 33 is connected to the adjustment component 3 via the connecting rope 34 to prevent the positioning member 33 from falling off / being lost from the adjustment component 3, thereby further improving the practicality of the working component lifting device 100.

[0043] Please also read Figure 5a to Figure 5e When the working assembly lifting device 100 of the present invention is used, the pedal body 111 is stepped on so that the pedal body 111 rotates around the rotating shaft 113 and forms an angle α with the limiting arm 115, and a space for accommodating the locking mechanism 12 to pass through a clearance space (such as Figure 5a to Figure 5b ), continue to step on the pedal body 111, drive the pedal bracket 112 to rotate around the transverse axis 21. When the pedal body 111 passes over the locking mechanism 12, stop stepping on the pedal body 111 so that the pedal body 111 returns to the initial position under the action of the reset spring 116. Further, the pedal mechanism 11 rotates in the opposite direction around the transverse axis 21 under the action of the gravity of the working component 200, so that the holding protrusion 123 at the end of the locking mechanism 12 passes through the groove 1111 and is held on the holding portion 114, so that the pedal mechanism 11 is fixed in the locking position, and the working component 200 is fixed in the first position (i.e., the maximum working height position).

[0044] Furthermore, the relative position between the positioning member 33 and the adjustment plate 32 in the adjustment component 3 is manually adjusted; after the relative position is determined, the pedal body 111 is stepped on so that the angle α is formed again between the pedal body 111 and the limit arm 115 and the clearance space for accommodating the passage of the locking mechanism 12, and the force of stepping on the pedal body 111 is controlled so that the pedal mechanism 11 passes over the locking mechanism 12 in the opposite direction under the combined action of the gravity of the working component 200 and / or the force of stepping on the pedal mechanism 11. At this time, the pedal mechanism 11 is stopped, and the adjustment rod 31 connected to the pedal bracket 112 slides on the surface of the adjustment plate 32 under the action of the gravity of the working component 200, and finally completes the positioning through the abutment of the locking member 33 with the engaging portion 311, so that the working component 200 is positioned at the second position at the corresponding height to complete the corresponding work task.

[0045] When the height of the second position of the working component 200 needs to be readjusted or transferred, the above steps are repeated to complete the switching of the first position and the second position of the working component 200 and the adjustment of the height of the second position through the cooperation between the pedal body 111 and the locking mechanism 12 and the cooperation between the various components in the adjustment component 3.

[0046] In the present invention, the working component lifting device 100 also includes a power-assisting component 4, which is connected to the transverse rotation axis 21, and the power-assisting component 4 and the pedal mechanism 11 are respectively arranged on both sides of the radial direction of the transverse rotation axis 21, and the power-assisting component 4 is in a stretched state. With such an arrangement, when the pedal mechanism 11 is stepped on, the power-assisting component 4 can assist the pedal mechanism 11 in driving the transverse rotation axis 21 to rotate, so as to facilitate the switching of the working component 200 between the first position and the second position through the pedal assembly 1, thereby further improving the ease of use of the working component lifting device 100 of the present invention.

[0047] It should be noted that the above description only uses the example that the working component lifting device 100 is provided with a group of pedal components 1, a group of connecting components 2 and a group of adjusting components 3. In the actual use of the working component lifting device 100 of the present invention, the working component lifting device 100 may be provided with two or more groups of connecting components 2, and the two adjacent groups of connecting components 2 are connected through an arc connecting rod 5.

[0048] Specifically, when the working component lifting device 100 is provided with two sets of connecting components 2, the working component lifting device 100 includes a first connecting component 2' located in front of the working direction of the working component 200 and a second connecting component 2" located behind the working direction of the working component 200, the first connecting component 2' and the second connecting component 2" are arranged in parallel, and the pedal component 1 and the adjustment component 3 are connected to the first connecting component 2' and are located at the same end of the transverse axis 21' of the first connecting component 2' (such as Figure 6 ).

[0049] Furthermore, one end of the arc-shaped connecting rod 5 is connected to the first connecting component 2′ / pedal component 1, and the other end is connected to the second connecting component 2″. Preferably, one end of the arc-shaped connecting rod 5 is connected to the pedal bracket 112, and the other end is connected to the transverse rotation axis 21″ of the second connecting component 2″. In this arrangement, when the pedal body 111 is stepped on, the pedal bracket 112 rotates accordingly to drive the transverse rotation axis 21′ to rotate while driving the arc-shaped connecting rod 5 connected to the pedal bracket 112 to move, further driving the transverse rotation axis 21″ of the second connecting component 2″ to rotate, so that the working component 200 connected to the first connecting component 2′ and the second connecting component 2″ can switch between the first position and the second position, and the height of the second position of the working component 200 is adjustable.

[0050] Furthermore, the power-assisting assembly 4 in this embodiment is connected to the transverse axis 21″ of the second connecting assembly 2″. Preferably, the power-assisting assembly 4 is arranged in pairs and symmetrically distributed on both sides of the center line of the working assembly 200 along a direction perpendicular to the transverse axis 21″, so as to assist the pedal mechanism 11 in driving the transverse axis 21′ and the transverse axis 21″ to rotate while ensuring that the transverse axis 21″ is subjected to uniform force, thereby preventing the transverse axis 21″ from being broken due to uneven force.

[0051] See also Figure 7 As shown, a garden tool 300 provided by the present invention comprises a base 301, an operating device 302 fixed on the base 301, a working component 200, and a lifting device for adjusting the second and third positions of the working component 200, and the lifting device is the aforementioned working component lifting device 100.

[0052] Specifically, the locking mechanism 12 is fixedly mounted on the base 301 through the retaining portion 121, and the adjusting plate 32 is fixedly mounted on the base 301 through the positioning portion 321, and the locking mechanism 12 and the adjusting plate 32 are staggered; further, the pedal assembly 1 is connected to the transverse shaft 21 and the pedal body 111 protrudes from the bottom of the base 301 through the pedal bracket 112 and is located at the front end of the garden tool 300, so that the adjusting rod 31 connected to the pedal bracket 112 is overlapped on the adjusting plate 32, which is convenient for the operator to control the connection assembly 2 to move up and down in a direction perpendicular to the horizontal plane by stepping on the pedal body 111 during the movement of the garden tool 300, so as to adjust the height of the second position of the working assembly 200.

[0053] Preferably, the working component lifting device 100 in this embodiment includes a first connecting component 2', a second connecting component 2" and a pair of power assist components 3 (such as Figure 6), further, one end of the power assist component 4 is detachably connected to the horizontal rotation axis 21″; the other end is detachably connected to the base 301, so as to facilitate timely replacement of the model of the power assist component 4 according to the type and weight of the working component 200, so as to further improve the practicality of the garden tool 300.

[0054] It should be noted that, in the present invention, only the garden tool 300 is a riding garden tool and the working component 200 is a cutting disc. In other embodiments of the present invention, the specific types of the garden tool 300 and the working component 200 can be selected and replaced according to actual conditions, that is, the specific types of the garden tool 300 and the working component 200 are not limited here.

[0055] In summary, the working assembly lifting device 100 of the present invention, by providing a pedal assembly 1 composed of a clamping structure and a connecting assembly 2 mechanically connected to the pedal assembly 1, enables the pedal mechanism 11 to switch between a locked position and a free position, and the switching and adjustment of the first position and the second position of the working assembly 200 can be completed without simultaneously controlling the pedal mechanism 11 and the adjusting assembly 3, which effectively improves the convenience and safety of the working assembly lifting device 100. At the same time, by providing a clamping mode of the adjusting assembly 3, the adjusting rod 31, the adjusting plate 32 and the positioning member 33 are movably connected, while ensuring that the height of the second position of the working assembly 200 is adjustable, the working assembly 200 has a degree of freedom perpendicular to the horizontal plane, further preventing the working assembly 200 from rigidly bumping against the working plane, so that the garden tool 300 using the working assembly lifting device 100 has a long service life, and the working assembly lifting device 100 has a simple structure and is simple and convenient to install, which reduces the manufacturing cost of the working assembly lifting device 100 and the garden tool 300 using the working assembly lifting device 100.

[0056] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A working component lifting device, comprising a pedal assembly and a connecting assembly for connecting the pedal assembly and the working component, characterized in that: The pedal assembly includes a pedal mechanism and a locking mechanism for limiting a locking position of the pedal mechanism, and the pedal mechanism can drive the working assembly to switch between a first position and a second position through the connecting assembly; the working assembly lifting device also includes an adjusting assembly, which is connected between the pedal assembly and the connecting assembly to adjust the height of the working assembly at the second position; The pedal mechanism comprises a pedal body and a pedal bracket for supporting the pedal body, one end of the pedal body is rotatably connected to the end of the pedal bracket through a rotating shaft, and the other end is provided with a clamping portion corresponding to the locking mechanism; The connecting assembly includes a transverse rotation shaft and a connecting mechanism connected to both ends of the transverse rotation shaft, and the pedal mechanism is connected to one end of the transverse rotation shaft; The connecting mechanism comprises a fixing part for fixing the connecting mechanism on the transverse axis and a connecting rod rotatably connected to the fixing part.

2. The working component lifting device according to claim 1, characterized in that: The adjustment assembly includes an adjustment rod connected to the pedal mechanism, an adjustment plate corresponding to the adjustment rod, and a positioning member detachably connected to the adjustment plate for limiting the relative position of the adjustment rod and the adjustment plate.

3. The working component lifting device according to claim 2, characterized in that: The adjusting rod comprises a fixed end rotatably fixed to the pedal mechanism and a free end arranged opposite to the fixed end, and the free end is provided with a clamping portion arranged corresponding to the positioning member.

4. The working component lifting device according to claim 3, characterized in that: The engaging portion is arranged in a stepped shape, including a plurality of staggered step surfaces.

5. The working component lifting device according to claim 3 or 4, characterized in that: The adjustment plate is provided with a positioning portion for fixing the installation position of the adjustment plate, and the adjustment plate is provided with a plurality of adjustment holes arranged in a row, and the positioning piece is clamped and accommodated in the adjustment hole to abut against the clamping portion.

6. The working component lifting device according to claim 5, characterized in that: The adjustment holes are arranged in multiple rows in parallel, and the adjustment holes in multiple rows are arranged in an inclined matrix.

7. The working component lifting device according to claim 1, characterized in that: The pedal mechanism includes a pedal bracket and a pedal body connected to the pedal bracket, one end of the pedal body is rotatably connected to the pedal bracket through a return spring, and the other end is provided with a clamping portion corresponding to the locking mechanism, and the locking mechanism is provided with a clamping protrusion corresponding to the clamping portion.

8. The working component lifting device according to claim 1, characterized in that: The working component lifting device also includes a power assist component, which is connected to the transverse rotation axis, and the power assist component and the pedal mechanism are respectively arranged on both sides of the transverse rotation axis in the radial direction to assist the pedal mechanism in driving the transverse rotation axis to rotate.

9. The working component lifting device according to claim 1, characterized in that: The working component lifting device comprises at least two groups of connecting components, and two adjacent groups of connecting components are connected through an arc connecting rod transmission.

10. A garden tool comprising a base, an operating device and a working component fixed to the base, and a lifting device for controlling the second and second positions of the working component, characterized in that: The lifting device is a working component lifting device according to any one of claims 1 to 9, the pedal assembly is fixedly mounted on the base, two groups of connecting assemblies are arranged in parallel, the two groups of connecting assemblies are connected by at least one arc-shaped connecting rod, and the pedal assembly is connected to the connecting assembly located in front of the running direction of the garden tool.

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