Mowing height floating structure and mower

Abstract

The utility model discloses a mowing height floating structure and a mowing machine, the mowing height floating structure comprises a lifting mechanism, the lifting mechanism is arranged on a mowing assembly and comprises a shear fork arm structure and a driving structure, the shear fork arm structure is connected between the mowing assembly and a machine body of the mowing machine, the driving structure is used for driving the shear fork arm structure to move in the vertical direction, and the lifting mechanism is arranged on the mowing assembly. And the mowing assembly is driven to lift relative to the machine body. According to the utility model, the scissor arm structure is adopted to ensure the smoothness of height adjustment of the mowing disc, an oval shape with a narrow end and a wide end is adopted as a height adjustment rotating cam, and the narrow end of the height adjustment rotating cam abuts against or is separated from the cam top block by a non-linear force, so that the cam top block drives a fulcrum on the scissor arm structure to slide in a preset sliding stroke, and the height of the mowing disc is adjusted. The lifting of the mowing disc relative to the machine body of the mowing machine is further driven, and the lifting of the terrain clearance of the mowing disc is realized through a simple structure.

Description

Technical Field

[0001] The present application relates to the technical field of height adjustment of mowing equipment, and in particular to a mowing height floating structure and a mowing machine. Background Art

[0002] The weeds in the lawn are high or low, so the lawn mower needs to adjust the mowing disc to different heights above the ground according to the different growth of weeds. The existing mowing disc height adjustment mechanism usually adopts a combination of a lifting motor and a lifting structure, and the lifting motor drives the lifting structure to perform the lifting action of the mowing disc. However, the electric lifting method driven by the lifting motor increases the production cost of the lawn mower. Therefore, for some non-high-end lawn mowers, it is still a common method to manually adjust the height of the mowing disc.

[0003] In the existing schemes, there are various types of artificial height adjustment structures for mowing discs. For users, the most important thing is how to achieve smooth height adjustment of the mowing disc, while for manufacturers, the main purpose is to use the simplest structure possible to achieve the height adjustment function of the mowing disc to reduce the manufacturing cost. Therefore, how to find a balance between simplifying the height adjustment structure of the mowing disc and ensuring the smoothness of the height adjustment of the mowing disc is a technical problem that needs to be solved in this field. Utility Model Content

[0004] The utility model aims to provide a mowing disc height adjustment mechanism with a simple structure and good height adjustment smoothness, and provides a mowing height floating structure and a mower.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A mowing height floating structure comprises: a lifting mechanism, which is arranged on a mowing component, and comprises a scissor arm structure and a driving structure. The scissor arm structure is connected between the mowing component and a body of the mower. The driving structure is used to drive the scissor arm structure to move in a vertical direction to drive the mowing component to rise and fall relative to the body, or the mowing component is driven by an upward external force or its own downward gravity to make the driving structure drive the scissor arm structure to slide freely within its preset sliding stroke, thereby driving the mowing component to float freely up and down relative to the body.

[0007] Preferably, the driving structure comprises a height-adjusting rotating cam, a cam top block and a return mechanism, the cam top block having a first sliding stroke in a second height-adjusting sliding groove on the top suspension bracket, the first scissor arm fulcrum of the scissor arm structure being arranged in the second height-adjusting sliding groove and connected to one end of the cam top block; when the height-adjusting rotating cam is rotated by an external force, its narrow head is pressed against or separated from the contact with the cam top block, so that the cam top block drives the first scissor arm fulcrum to slide in the second height-adjusting sliding groove, thereby driving the lifting and lowering of the mowing component relative to the machine body;

[0008] One end of the return mechanism is connected to the top suspension bracket, and the other end is connected to the cam top block. The return mechanism has a return force on the cam top block to drive the cam top block to slide in the second height adjustment sliding groove to drive the mowing assembly to return to the initial state of the lowest height above the ground.

[0009] Preferably, the return mechanism is a return tension spring.

[0010] Preferably, the scissor arm structure includes a first scissor arm assembly and a second scissor arm assembly arranged opposite to the first scissor arm assembly, the scissor arm assembly includes a rear rocker arm and a front rocker arm, and the center hole fulcrums of the rear rocker arm and the front rocker arm are pin-matched with each other to achieve a rotatable connection.

[0011] Preferably, the first scissor arm fulcrums of the rear rocker arms of the first scissor arm assembly and the second scissor arm assembly are respectively slidably arranged in the second height adjustment sliding grooves relatively arranged on the left and right sides of the top suspension bracket, and are respectively fixedly connected to one end of the cam top block; the second scissor arm fulcrums of the rear rocker arms of the two scissor arm assemblies are rotatably fixed on the housing of the mowing assembly;

[0012] The third scissor arm fulcrums of the front rocker arms of the two scissor arm assemblies are respectively slidably arranged in the first height adjustment sliding grooves relatively arranged on the left and right sides of the body of the mowing assembly; the fourth scissor arm fulcrums of the front rocker arms of the two scissor arm assemblies are respectively rotatably connected to the top suspension bracket.

[0013] Preferably, the scissor arm assembly is mounted on the casing of the mowing assembly via a fixing plate, the fixing plate comprises a limiting plate and a fixing block, the limiting plate is provided with the first height adjustment sliding groove, the third scissor arm fulcrum of the front rocker arm is slidably arranged in the first height adjustment sliding groove, and the fourth scissor arm fulcrum of the front rocker arm is rotatably arranged on the fixing block.

[0014] Preferably, the height-adjusting rotating cam is in an oval shape with one end being narrow and the other end being wide, and the height-adjusting rotating cam is fixedly mounted on the top suspension bracket.

[0015] Preferably, a cylindrical structure is installed on the upper surface of the height-adjusting rotating cam, and a knob for controlling the lifting and lowering of the mowing assembly is fixedly connected to the cylindrical structure. The knob is rotated by external force to drive the height-adjusting rotating cam to rotate, thereby making the narrow head of the height-adjusting rotating cam close to or away from the contact with the cam top block, and further making the first scissor arm fulcrum of the scissor arm structure connected to the end of the cam top block slide in the second height-adjusting sliding groove, thereby finally adjusting the lifting and lowering of the mowing assembly.

[0016] Preferably, the number of the return tension springs is two, and the left and right return tension springs are symmetrically arranged in the grooves provided on the top suspension bracket;

[0017] A ball is also arranged on the upper surface of the height-adjusting rotating cam. When the knob for rotating the height-adjusting rotating cam is rotated, the ball can be elastically embedded in a circular groove arranged on the knob.

[0018] The utility model also provides a lawn mower, in which the lawn mowing height floating structure is installed.

[0019] The utility model has the following beneficial effects:

[0020] The scissor arm structure is adopted to ensure the smoothness of adjusting the height of the mowing disc. An oval shape with one end narrow and the other end wide is adopted as a height-adjusting rotating cam. The narrow end thereof presses against or disengages from the cam top block with a nonlinear force, so that the cam top block drives the fulcrum on the scissor arm structure to slide within a preset sliding stroke, thereby driving the mowing disc to rise and fall relative to the body of the lawn mower. The mowing disc can be raised and lowered above the ground with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a side view schematic diagram of the mowing height floating structure disclosed in the embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the floating structure for mowing height disclosed in the embodiment of the utility model in the lowest gear position closest to the ground;

[0023] Figure 3 It is a schematic diagram of the structure of the floating structure for mowing height disclosed in the embodiment of the utility model in the highest gear adjustment position farthest from the ground;

[0024] Explanation of the numbers in the figure: 1. Mowing assembly; 2. Scissor arm assembly; 21. Rear rocker arm; 22. Front rocker arm; 23. Limiting plate; 24. First height adjustment sliding groove; 25. Fixed block; 3. Top hanging bracket; 31. Height adjustment rotating cam; 33. Cam top block; 34. Return spring; 35. Second height adjustment sliding groove; 211. First scissor arm fulcrum; 331. Narrow head; 212. Second scissor arm fulcrum; 221. Third scissor arm fulcrum; 222. Fourth scissor arm fulcrum; 4. Cylindrical structure; 5. Shifting ball; 6. Groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The mowing height floating structure provided by the embodiment of the utility model is as follows: Figure 1-Figure 3 As shown, it includes a lifting mechanism, which is arranged on a mowing component 1 (such as a mowing disc). The lifting mechanism includes a scissor arm structure and a driving component. The scissor arm structure is connected between the mowing component and the body of the lawn mower. The driving structure is used to drive the scissor arm structure to move in the vertical direction to drive the mowing component 1 to rise and fall relative to the body, or the mowing component 1 is driven by an upward external force or its own downward gravity to drive the scissor arm structure to slide freely within its preset sliding stroke, thereby driving the mowing component 1 to float freely up and down relative to the body.

[0027] Specifically, if Figure 2As shown, two fixing blocks 25 and limiting plates 23 are relatively arranged on the shell of the mowing component 1, and the tops of the two limiting plates 23 are both provided with a first height adjustment sliding groove 24, and the fixing blocks 25 and limiting plates 23 are respectively rotatably connected with the fourth scissor arm fulcrum 212 of the rear rocker arm 21 and the third scissor arm fulcrum 221 of the front rocker arm 22 in the scissor arm structure, and the third scissor arm fulcrum 221 of the front rocker arm 22 can slide in the first height adjustment sliding groove 24, and the central hole fulcrums of the rear rocker arm 21 and the front rocker arm 22 are pin-matched with each other, and the rear rocker arm 2 The first scissor arm fulcrum 211 of the front rocker arm 22 and the fourth scissor arm fulcrum 222 of the front rocker arm 22 are rotatably connected to the side of the top suspension bracket 3, the first scissor arm fulcrum 211 of the rear rocker arm 21 is slidably connected to the second height adjustment sliding groove 35, the second height adjustment sliding groove 35 is arranged at the symmetrical side of the top suspension bracket 3, the first scissor arm fulcrum 211 of the rear rocker arm 21 is fixedly connected to the end of the cam top block 33, and the cam top block 33 moves linearly in the sliding stroke limited by the second height adjustment sliding groove 35 under the drive of the first scissor arm fulcrum 211. One end of the return tension spring 34 is connected to the top suspension bracket 3, and the other end is connected to the cam top block 33. The return tension spring 34 has a restoring force on the cam top block 33 to drive the cam top block 33 to slide in the second height adjustment sliding groove 35 to drive the mowing assembly 1 to return to the initial state of the lowest height above the ground.

[0028] Figure 2 The mowing assembly 1 is shown in a schematic diagram when it is closest to the ground, that is, the mowing height floating structure provided in this embodiment lowers the mowing assembly 1 to the closest position to the ground. The adjustment principle is: turn the height adjustment rotating cam 31 clockwise, and the narrow head 331 ( Figure 3 ) slowly breaks away from the contact with the cam top block 33, and under the restoring force of the return spring 34, the cam top block 33 is pulled to Figure 2 The scissor arm structure is pulled to the position shown in the figure until it reaches the maximum sliding stroke provided by the second height adjustment sliding slot 35, at which time the scissor arm structure is fully stretched, so that the mowing assembly 1 has the shortest ground clearance. On the contrary, the height adjustment rotating cam 31 is rotated counterclockwise, and the narrow head 331 of the height adjustment rotating cam 31 slowly presses against the cam top block 33. When the pressing force is greater than the restoring force of the return tension spring 34, the scissor arm structure slowly contracts until it reaches the fully contracted state, so that the mowing assembly 1 has the maximum ground clearance.

[0029] In addition, when the mowing component 1 has an upward force, for example, when the mower passes through some areas with complex terrain, the obstacles such as stones in the area will lift up the mowing component, giving the mowing component an upward force. In order to prevent the obstacles from pushing up the mowing component and causing the mowing component to be damaged due to current overload or the blade cutting the obstacle, it is hoped that the mowing component can float upward freely when encountering the above force, and can return to its original position freely when the force disappears. The mowing height floating structure provided by the utility model also has the above function, and the technical principle for realizing this function is:

[0030] When the mowing assembly is subjected to an upward external force, the scissor arm structure slides freely within its preset sliding stroke, thereby driving the mowing assembly to float upward relative to the machine body. When the external force disappears, the mowing assembly, under the action of its own gravity, makes the scissor arm structure slide freely within its preset sliding stroke, thereby driving the mowing assembly to float downward relative to the machine body. It should be noted here that the preset sliding stroke for the scissor arm structure is not necessarily its full sliding stroke. For example, the full sliding stroke of the scissor arm structure is Figure 2 As shown in the second height adjustment sliding groove 35, assuming that the mowing height floating structure provided in this embodiment provides 5 up-shifting levels, each corresponding to one fifth of the length of the second height adjustment sliding groove 35, when the up-shifting level of the mowing assembly is set to level 1, the first scissor arm fulcrum 211 of the scissor arm assembly slides from the initial position of the up-shifting level at level 0 to one fifth of the length of the second height adjustment sliding groove 35. At this time, the height of the mowing assembly is locked to level 1. Under the height locking condition of level 1, the distance of the mowing assembly floating freely up and down is four fifths of the length of the second height adjustment sliding groove 35 from level 1 to level 5.

[0031] The following is a detailed description of the structure of the mowing height floating structure provided in this embodiment:

[0032] like Figure 1-Figure 3As shown, in this embodiment, the driving structure for driving the scissor arm structure to move in the vertical direction includes a height-adjusting rotating cam 31 (the height-adjusting rotating cam 31 is an oval shape with one end narrow and the other end wide, and the height-adjusting rotating cam 31 is fixedly mounted on the top suspension bracket 3), a cam top block 33 and a return mechanism (preferably a return tension spring 34, the number of which is two, which are symmetrically arranged in the groove 6 opened on the top suspension bracket 3 on the left and right), the cam top block 33 has a first sliding stroke in the second height-adjusting sliding groove 35 on the top suspension bracket 3, the first scissor arm fulcrum 211 of the scissor arm structure is arranged in the second height-adjusting sliding groove 35 and connected to one end of the cam top block 33; when the height-adjusting rotating cam 31 is rotated by an external force, its narrow head 331 is pressed against or separated from the contact with the cam top block 33, so that the cam top block 33 drives the first scissor arm fulcrum 211 to slide in the second height-adjusting sliding groove 35, thereby driving the grass cutting component 1 to rise and fall relative to the machine body;

[0033] One end of the return mechanism is connected to the top suspension bracket 3, and the other end is connected to the cam top block 33. The return mechanism has a return force on the cam top block 33 to drive the cam top block 33 to slide in the second height adjustment sliding groove 35 to drive the mowing assembly 1 to return to the initial state of the lowest height above the ground.

[0034] A cylindrical structure 4 is installed on the upper surface of the height-adjusting rotating cam 31, and a knob for controlling the lifting and lowering of the mowing component 1 is fixedly connected to the cylindrical structure 4. The knob is rotated by external force to drive the height-adjusting rotating cam 31 to rotate, thereby making the narrow head of the height-adjusting rotating cam 31 close to or away from the contact with the cam top block 33, and further making the first scissor arm fulcrum 211 of the scissor arm structure connected to the end of the cam top block 33 slide in the second height-adjusting sliding groove 35, finally adjusting the lifting and lowering of the mowing component 1.

[0035] The scissor arm structure includes a first scissor arm assembly and a second scissor arm assembly arranged opposite to the first scissor arm assembly. The scissor arm assembly includes a rear rocker arm 21 and a front rocker arm 22. The center hole fulcrums of the rear rocker arm 21 and the front rocker arm 22 are pin-matched with each other to achieve a rotatable connection.

[0036] The first scissor arm fulcrums 211 of the rear rocker arms 21 of the first scissor arm assembly and the second scissor arm assembly are respectively slidably arranged in the second height adjustment sliding grooves 35 on the left and right sides relatively arranged on the top suspension bracket 3, and are respectively fixedly connected to one end of the cam top block 33; the second scissor arm fulcrums 212 of the rear rocker arms 21 of the two scissor arm assemblies are rotatably fixed on the housing of the mowing assembly 1;

[0037] The third scissor arm fulcrums 221 of the front rocker arms 22 of the two scissor arm assemblies are respectively slidably arranged in the first height adjustment sliding grooves 24 on the left and right sides of the body of the mowing assembly 1; the fourth scissor arm fulcrums 222 of the front rocker arms 22 of the two scissor arm assemblies are respectively rotatably connected to the top suspension bracket 3.

[0038] The scissor arm assembly is installed on the casing of the mowing assembly 1 through a fixing plate, and the fixing plate includes a limiting plate 23 and a fixing block 25. A first height adjustment sliding groove 24 is opened in the limiting plate 23, and the third scissor arm fulcrum 221 of the front rocker arm 22 is slidably set in the first height adjustment sliding groove 24, and the fourth scissor arm fulcrum 222 of the front rocker arm 22 is rotatably set on the fixing block 25.

[0039] In addition, a bead 5 is also provided on the upper surface of the height-adjusting rotating cam 31. When the knob for rotating the height-adjusting rotating cam 31 is rotated, the bead 5 can be elastically embedded in a circular groove provided on the knob. Several circular grooves are evenly distributed in a ring shape with the rotating axis of the knob as the center. During the rotation process, the bead 5 is elastically embedded in the corresponding circular groove to increase the rotation damping and improve the rotation feel.

[0040] Although examples of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mowing height floating structure, characterized in that: include: A lifting mechanism is arranged on a mowing assembly (1), comprising a scissor arm structure and a driving structure, wherein the scissor arm structure is connected between the mowing assembly (1) and a body of the mower, and the driving structure is used to drive the scissor arm structure to move in a vertical direction, so as to drive the mowing assembly (1) to be lifted or lowered relative to the body, or the mowing assembly (1) is subjected to an upward external force or its own downward gravity, so that the scissor arm structure slides freely within a preset sliding stroke, thereby driving the mowing assembly (1) to float freely up or down relative to the body.

2. The mowing height floating structure according to claim 1, characterized in that: The driving structure comprises a height-adjusting rotating cam (31), a cam top block (33) and a return mechanism; the cam top block (33) has a first sliding stroke in a second height-adjusting sliding groove (35) on the top suspension bracket (3); a first scissor arm fulcrum (211) of the scissor arm structure is arranged in the second height-adjusting sliding groove (35) and connected to one end of the cam top block (33); when the height-adjusting rotating cam (31) is rotated by an external force, its narrow head (331) is pressed against or separated from the contact with the cam top block (33), so that the cam top block (33) drives the first scissor arm fulcrum (211) to slide in the second height-adjusting sliding groove (35), thereby driving the grass cutting component (1) to rise and fall relative to the machine body; One end of the return mechanism is connected to the top suspension bracket (3), and the other end is connected to the cam top block (33). The return mechanism has a return force on the cam top block (33) to drive the cam top block (33) to slide in the second height adjustment sliding groove (35) to drive the mowing component (1) to return to the initial state of the lowest height above the ground.

3. The mowing height floating structure according to claim 2, characterized in that: The return mechanism is a return tension spring (34).

4. The mowing height floating structure according to claim 2, characterized in that: The scissor arm structure comprises a first scissor arm assembly and a second scissor arm assembly arranged opposite to the first scissor arm assembly. The scissor arm assembly (2) comprises a rear rocker arm (21) and a front rocker arm (22). The central hole fulcrums of the rear rocker arm (21) and the front rocker arm (22) are rotatably connected by means of a pin.

5. The mowing height floating structure according to claim 4, characterized in that: The first scissor arm fulcrums (211) of the rear rocker arms (21) of the first scissor arm assembly and the second scissor arm assembly are respectively slidably arranged in the second height adjustment sliding grooves (35) relatively arranged on the left and right sides of the top suspension bracket (3), and are respectively fixedly connected to one end of the cam top block (33); the second scissor arm fulcrums (212) of the rear rocker arms (21) of the two scissor arm assemblies are rotatably fixed on the housing of the mowing assembly (1); The third scissor arm fulcrums (221) of the front rocker arms (22) of the two scissor arm assemblies are respectively slidably arranged in first height adjustment sliding grooves (24) relatively arranged on the left and right sides of the body of the mowing assembly (1); and the fourth scissor arm fulcrums (222) of the front rocker arms (22) of the two scissor arm assemblies are respectively rotatably connected to the top suspension bracket (3).

6. The mowing height floating structure according to claim 5, characterized in that: The scissor arm assembly is mounted on the housing of the mowing assembly (1) via a fixing plate, the fixing plate comprising a limit plate (23) and a fixing block (25), the limit plate (23) being provided with the first height adjustment sliding groove (24), the third scissor arm fulcrum (221) of the front rocker arm (22) being slidably disposed in the first height adjustment sliding groove (24), and the fourth scissor arm fulcrum (222) of the front rocker arm (22) being rotatably disposed on the fixing block (25).

7. The mowing height floating structure according to claim 2, characterized in that: The height-adjusting rotating cam (31) is in an oval shape with one end being narrow and the other end being wide. The height-adjusting rotating cam (31) is fixedly mounted on the top suspension bracket (3).

8. The mowing height floating structure according to claim 2 or 7, characterized in that: A cylindrical structure (4) is installed on the upper surface of the height-adjusting rotating cam (31); a knob for controlling the lifting and lowering of the mowing assembly (1) is fixedly connected to the cylindrical structure (4); the knob is rotated by an external force to drive the height-adjusting rotating cam (31) to rotate, thereby causing the narrow head of the height-adjusting rotating cam (31) to be pressed against or away from the contact with the cam top block (33), further causing the first scissor arm fulcrum (211) of the scissor arm structure connected to the end of the cam top block (33) to slide in the second height-adjusting sliding groove (35), thereby finally adjusting the lifting and lowering of the mowing assembly (1).

9. The mowing height floating structure according to claim 3, characterized in that: The number of the return tension springs (34) is two, which are symmetrically arranged on the left and right sides in a groove (6) provided on the top suspension bracket (3); A ball (5) is also provided on the upper surface of the height-adjusting rotating cam (31). When a knob for rotating the height-adjusting rotating cam (31) is rotated, the ball (5) can be elastically embedded in a circular groove provided on the knob.

10. A lawn mower, characterized in that: A mowing height floating structure as described in any one of claims 1 to 9 is installed inside.

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