Grass cutting and trimming machine capable of simultaneously achieving grass cutting and trimming and capable of multi-stage adjustment

Abstract

The application relates to a grass cutting and hedge cutting machine capable of simultaneously realizing grass cutting and hedge cutting and capable of multi-grade adjustment, and belongs to the technical field of grass cutting and hedge cutting machines. The grass cutting and hedge cutting machine comprises a machine head, a left wheel assembly and a right wheel assembly, the left wheel assembly and the right wheel assembly are symmetrical relative to the machine head, left and right supports are further arranged on the two sides of the machine head, the left wheel assembly comprises a left wheel frame, a left mounting groove is vertically arranged in the left support, and a left upper mounting groove is horizontally arranged in the left support, the left wheel frame is matched with the left mounting groove and the left upper mounting groove through T-shaped structures, the left support is provided with a left side unlocking mechanism and a left upper unlocking mechanism, the left side unlocking mechanism comprises a left unlocking button, a left locking block and a left spring, the left wheel frame is provided with a left height adjustment limiting groove, the left unlocking button is slidingly installed on the left support, the left unlocking button is pressed to slide and push the left locking block to compress the left spring and separate from the left height adjustment limiting groove, and the left upper unlocking mechanism is similar to the left side unlocking mechanism. The application has the effect of quickly switching states to adapt to different operation requirements.

Description

Technical Field

[0001] This application relates to the field of grass cutters and brush cutters, and in particular to grass cutters and brush cutters that can simultaneously cut grass and trim edges and have multiple adjustable speeds. Background Technology

[0002] A lawn mower is a tool used to trim lawns and vegetation. Most common lawn mowers with a mowing head are driven by a motor to rotate the mowing head, and the mowing rope extending from the mowing head rotates with the mowing head to perform the mowing operation.

[0003] Traditional lawn mowers typically consist of a main body and an extension bar with a handle attached to it. The main body is used to mount the mowing head, and the mowing operation is performed by holding the extension bar with the handle while the machine is suspended above the main body. This method is adaptable to various situations and provides better mowing results with fewer blind spots, but it is relatively strenuous to use. Therefore, some lawn mowers have wheels mounted on both sides of the main body. In this case, the extension bar mainly serves to move the main body, which is supported by the wheels, making mowing easier. However, since the wheels can flatten the lawn, some areas may not be properly mowed, or some areas of the lawn may not be suitable for the mower to flatten. To avoid damaging the lawn, the wheels of the lawn mower with wheels need to be removed and used while suspended above the lawn. In addition, during the actual mowing process, the grass at the edge of the lawn often extends into the road. Simply mowing the lawn from above is not enough to effectively cut the extended grass. It is often necessary to trim the lawn from the side, that is, to hold the mowing head horizontally and trim the lawn vertically.

[0004] The wheels on common lawn mowers are usually fixed with fasteners, making wheel removal very inconvenient. When the wheels need to be used again, installation is also inconvenient. The lawn mower cannot easily switch between the two states of having wheels and not having wheels. For edge trimming operations or when suspended operations are required, it is not convenient to switch the state of the lawn mower to adapt. Summary of the Invention

[0005] In order to simultaneously perform grass cutting, trimming, and overhead operations and switch quickly, this application provides a grass cutter and brush cutter that can simultaneously perform grass cutting and trimming and has multiple adjustable speeds.

[0006] The brush cutter and trimmer provided in this application, which can simultaneously perform mowing and trimming and has multiple adjustable speeds, adopts the following technical solution: A brush cutter capable of simultaneously mowing and trimming with multiple adjustable speeds includes a machine head and left and right wheel assemblies mounted on either side of the machine head. The structures of the left and right wheel assemblies are symmetrical with respect to the machine head. A left bracket for mounting the left wheel assembly and a right bracket for mounting the right wheel assembly are symmetrically arranged on both sides of the machine head. The left wheel assembly includes a left wheel frame and a left wheel rotatably mounted on the left wheel frame. The left bracket has a vertically opening left mounting groove for vertically sliding the left wheel frame, and a horizontally opening upper left mounting groove for horizontally sliding the left wheel frame. The left wheel frame and... Both the left mounting slot and the upper left mounting slot are fitted with a T-shaped structure. The left bracket is provided with a left unlocking mechanism and an upper left unlocking mechanism. The left unlocking mechanism includes a left unlocking button, a left locking block, and a left spring. The left wheel frame has a left height adjustment limit slot. The left locking block is slidably mounted on the left bracket. The left spring pushes the left locking block into the left height adjustment limit slot and restricts the vertical sliding of the left wheel frame. The left unlocking button is slidably mounted on the left bracket. The left unlocking button is pressed and slides, pushing the left locking block to compress the left spring and disengage from the left height adjustment limit slot. The upper left unlocking mechanism works similarly to the left unlocking mechanism.

[0007] By adopting the above technical solutions, the left wheel assembly can be installed in the left mounting slot of the left support, and the right wheel assembly can be installed in the right mounting slot of the right support, thus achieving easy mowing operations supported by both the left and right wheels. Alternatively, the left wheel assembly can be installed in the upper left mounting slot of the left support, and the right wheel assembly can be installed in the upper right mounting slot of the right support, thus achieving easy trimming operations supported by either the left or right wheel. During trimming operations, only the left wheel assembly supporting the machine head needs to be installed in the upper left mounting slot. The right wheel assembly can then be installed in either the right or upper right mounting slot. Installing the right wheel assembly in the right mounting slot allows for better wall support when there is a wall present, enabling more efficient trimming. For effortless trimming, the left and right wheel assemblies can be interchanged. The left and right wheel assemblies can be easily removed by pressing the left unlock button, allowing for hamming or trimming operations with the head suspended. Alternatively, the left wheel assembly can be installed in the left mounting slot, and the right wheel assembly in the upper right mounting slot for hamming. This is primarily suitable for lawns with walls or other supports along the edges, providing more effortless trimming. Various usage modes are available, allowing users to choose the mode that best suits their needs. Switching between modes is as simple as pressing the left and right unlock buttons, enabling quick mode switching.

[0008] Optionally, the upper left mounting slot is formed along the width direction of the left bracket on the upper side wall of the left bracket. The left unlocking mechanism also includes a left unlocking button cover. The left unlocking button cover has a left unlocking slide groove for mounting the left unlocking button. The left unlocking button is located between the left mounting slot and the upper left mounting slot. The bottom of the left bracket has a space for mounting the left unlocking button cover. The left unlocking button is fixed to the bottom of the left bracket with a screw, thus restricting the left unlocking button within the left unlocking slide groove. One end of the left unlocking button is located within the left unlocking slide groove and is equipped with the left spring. The other end of the left unlocking button is located outside the left bracket. The left locking block is positioned on the left unlocking button facing the upper left mounting slot. On one side of the left mounting slot, the upper left unlocking mechanism includes an upper left locking block. The upper left locking block is slidably installed in the left bracket, with one end of the upper left locking block located above the left unlocking button and the other end extending toward the upper left mounting slot. The sliding direction of the upper left locking block is perpendicular to the sliding direction of the left unlocking button. The upper left locking block has a connecting cylinder protruding toward the left unlocking button. The left unlocking button has a connecting oblong hole for mounting the connecting cylinder. The connecting oblong hole is inclined along the sliding direction and width direction of the left unlocking button. The left unlocking button slides under pressure and compresses the left spring, which in turn drives the connecting cylinder and thus drives the upper left locking block to disengage from the left height adjustment limit slot.

[0009] By adopting the above technical solution, the left unlocking mechanism and the upper left unlocking mechanism are combined together, so that the left wheel assembly can be removed and installed by the left unlocking button, whether it is installed in the left mounting slot or the upper left mounting slot. The structure is more compact and the operation is more convenient. The same applies to the right wheel assembly.

[0010] Optionally, the left mounting slot extends vertically through the left bracket, and there are multiple left height adjustment limiting slots, which are vertically spaced along the left wheel frame. The upper left mounting slot is located on the rear side of the machine head in the forward direction.

[0011] By adopting the above technical solution, the height of the left wheel assembly can be adjusted in multiple positions, allowing for grass cutting operations at different heights. Furthermore, since the left unlocking mechanism and the upper left unlocking mechanism share a common structural element, the trimming operation height can also be adjusted. Because the machine head tilts during trimming, the height of the machine head during trimming can be adjusted by changing the position of the left wheel assembly in the upper left mounting slot. The same applies to the right wheel assembly. The left mounting slot is vertically continuous, allowing the left wheel assembly to be installed from bottom to top. To remove it, the left unlocking buttons on both sides of the machine head can be pressed. The right unlock button allows the machine head to drop under gravity, detaching the left and right wheel assemblies. This makes changing positions easier and less strenuous. The upper left mounting slot is designed to slide in from the front of the machine head for a more secure fit, which is the common design. However, sliding in from the rear makes removal easier. Although the functions are contradictory, the vertical control of the upper left locking block via the left unlock button, due to the tangential force locking component, ensures a more secure lock on the left wheel assembly. This allows for rear sliding installation and a more secure installation of the left wheel assembly within the upper left mounting slot.

[0012] Optionally, it also includes a rotating sleeve mounted on the machine head, a handle, an aluminum tube for mounting the handle, and a two-stage adjustable connection structure. The rotating sleeve is used to mount the end of the aluminum tube away from the handle. The two-stage adjustable connection structure includes a limiting sleeve and a button sleeve. The limiting sleeve is rotatably mounted inside the rotating sleeve. The end of the aluminum tube slides through the rotating sleeve, and the aluminum tube is fixed to the limiting sleeve and rotates synchronously. The button sleeve is slidably mounted inside the rotating sleeve and is fitted onto the aluminum tube. The button sleeve is located at the position of the limiting sleeve facing... At one end of the handle, the limiting sleeve and the button sleeve are respectively provided with a positioning protrusion and a positioning groove that cooperate with each other. The positioning protrusion is inserted into the positioning groove along the sliding direction of the button sleeve. The outer wall of the button sleeve is provided with a limiting push knob. The rotating sleeve has an exposed waist-shaped hole for the limiting push knob to slide. There are two positioning protrusions, which are arranged 180 degrees apart around the circumference of the aluminum tube. There are four positioning grooves, which are arranged 90 degrees apart around the circumference of the aluminum tube.

[0013] By adopting the above technical solution, the aluminum tube is used for handle installation, and the aluminum tube is also fixed to the limiting sleeve. The limiting sleeve is rotatably installed inside the rotating sleeve, that is, one end of the aluminum tube is rotatably installed in the rotating sleeve through the limiting sleeve, while the button sleeve is slidably installed inside the rotating sleeve. By sliding the button sleeve away from the limiting sleeve, the positioning protrusion can be disengaged from the positioning groove, and the button sleeve releases the rotation lock on the limiting sleeve, ultimately allowing the aluminum tube to rotate relative to the rotating sleeve. When the button sleeve slides back to its original position, it can again complete the relative rotation restriction on the limiting sleeve, thereby restricting the rotation of the aluminum tube relative to the rotating sleeve. In this process, the four positioning grooves are divided into two groups, which are respectively used for the two positioning protrusions to be inserted into the two rotation positions of the aluminum tube relative to the rotating sleeve. That is, the aluminum tube can interchange and maintain its state relative to the rotating sleeve. Since the handle is installed on the aluminum tube and the rotating sleeve is installed on the machine head, the machine head can rotate relative to the handle while the handle is in its original state, so as to realize the conversion between the two working states of trimming and edge trimming. During this process, the handle is always in a convenient gripping state, thereby achieving the function of convenient edge trimming operation.

[0014] Optionally, it also includes a mounting bracket, which is mounted on the machine head and extends outwards on both sides of the machine head. The left bracket and the right bracket are detachably mounted on the extended portion of the mounting bracket.

[0015] By adopting the above technical solution, the left or right support can be removed separately for edge trimming with one-sided support, or both the left and right supports can be removed simultaneously for effortless suspended operation, which is suitable for users with less strength. Users with greater strength can use the machine without removing the supports, without having to consider the placement of the removed left and right wheel components. When operating in the air, the left and right wheels can also be placed on the lawnmower for immediate use. Alternatively, only the left and right wheel components can be removed without removing the left and right supports, which is suitable for different users.

[0016] Optionally, the left wheel assembly further includes a left sway block and a left sway spring. The left sway block is vertically slidably mounted on the left wheel frame. The left sway block is used for mounting the left wheel. The left sway spring is located above the left sway block and pushes the left sway block from top to bottom.

[0017] By adopting the above technical solution, the left wheel can also flexibly fluctuate in height relative to the left wheel frame itself, allowing for fine height adjustments at the edge of the lawn or at different heights, thus providing a better fit. The multi-level height adjustment of the left and right wheel assemblies, combined with the stepless adjustment of the left or right wheel itself, allows the left and right wheel assemblies to be adjusted to different height levels first, and then stepless adjustment can be made by applying force. Since the applied force generally changes very slightly, it needs to be combined with the multi-level adjustment itself to achieve a more precise adjustment to suit the required mowing conditions.

[0018] Optionally, the left wheel frame has a vertically formed left structural groove on its end face facing the left support. The left locking block is slidably installed on the left support along the width direction of the left mounting groove, and one end of the left locking block extends out of the left mounting groove. The left height adjustment limiting groove is formed on the groove wall of the left structural groove, and the left wheel frame has left height adjustment limiting grooves on both sides of the groove wall of the left structural groove. The outer wall of the left wheel frame has a left outer height adjustment groove. The left outer height adjustment groove and the left height adjustment limiting groove are staggered in the height direction of the left wheel frame, and adjacent left outer height adjustment grooves and left height adjustment limiting grooves are formed on the same solid, that is, the adjacent groove walls of adjacent left outer height adjustment grooves and left height adjustment limiting grooves are located on the same solid at the top and bottom.

[0019] By adopting the above technical solution, the left wheel assembly can be installed in the left mounting slot and the upper left mounting slot regardless of whether it is installed in the forward or reverse direction, and the right wheel assembly can also be installed in the left mounting slot and the upper left mounting slot. This simplifies the installation process, eliminating the need to differentiate between the left and right wheel assemblies, and installation does not require distinguishing between top and bottom. The process of switching states is more convenient, further facilitating state conversion and installation. The left outer height adjustment slot can also replace the left height adjustment limit slot. That is, the left unlocking mechanism and the upper left unlocking mechanism can be set to cooperate with the left outer height adjustment slot, or only the left unlocking mechanism cooperates with the left outer height adjustment slot, or only the upper left unlocking mechanism cooperates with the left outer height adjustment slot. The staggered arrangement of the left outer height adjustment slot and the left height adjustment limit slot improves the structural strength of the left wheel frame and reduces the overall weight.

[0020] Optionally, the axis of the left wheel is located at one-third of the height of the left wheel frame.

[0021] By adopting the above technical solution, the left wheel frame can be installed in both directions on the left bracket by rotating it up and down, thereby achieving six height adjustments. Without increasing the number of left height limit slots, the accuracy of multi-level adjustment is higher, and the height adjustment amount between each height level is approximately the same.

[0022] Optionally, an auxiliary handle is also included. The auxiliary handle is installed on the aluminum tube and is located between the handle and the machine head. The auxiliary handle has a gripping hole for holding, with the opening of the gripping hole facing the handle. The auxiliary handle includes a gripping part and a fixing part. The fixing part is installed on the aluminum tube, and the gripping part is rotatably installed on the fixing part. The rotation direction of the gripping part is consistent with the orientation of the gripping hole. A first limiting ring protrusion is provided on the inner wall of the rotating sleeve, and a second limiting ring protrusion is provided on the outer wall of the limiting sleeve. There are two second limiting ring protrusions, which are spaced apart. The space between the two second limiting ring protrusions is for the first limiting ring protrusion to be installed. A corner block is provided between the two second limiting ring protrusions. The first limiting ring protrusion abuts against the corner block to restrict the rotation of the limiting sleeve relative to the rotating sleeve, and the rotation stroke of the limiting sleeve relative to the rotating sleeve is 90 degrees.

[0023] By adopting the above technical solution, the auxiliary handle makes it easier to operate the lawn mower with both hands. One hand can hold the main handle and the other hand can hold the auxiliary handle, making the hand holding method more reasonable and comfortable. The auxiliary handle can also be flipped to adjust the angle, so as to better adapt to the comfortable grip of the user. The presence of the corner block can limit the rotation position of the aluminum tube relative to the machine head, and better complete the state switching between the machine head and the aluminum tube to adapt to lawn mowing and trimming operations.

[0024] Optionally, it also includes a trimming head, which is installed below the machine head. The trimming head includes a trimming head body, a hook, a trimming rope, and a locking assembly. The trimming head body is provided with a pin. The hook has a pin hole for inserting the pin. One end of the trimming rope is fixed to the hook, and the other end of the trimming rope extends outside the hook. The locking assembly includes a baffle, which includes a mounting part and a blocking part. The mounting part is rotatably mounted on the trimming head body. The blocking part extends out of the mounting part and rotates synchronously with the mounting part. The blocking part rotates to the position of the pin and prevents the hook from disengaging from the pin.

[0025] By adopting the above technical solution, the hook serves as the attachment for the hay trimming rope. The hay trimming rope is installed on the hay trimming head body through a pin insertion mechanism. This insertion method is more convenient and indirectly facilitates the installation of the hay trimming rope. Then, by rotating the baffle of the locking component, the baffle's blocking part can be rotated to the pin position, preventing the hook from detaching from the pin. The hook is mainly used to install the hay trimming rope onto the hay trimming head body, while the locking component mainly prevents the hook from detaching from the hay trimming head body, ultimately achieving simple installation of the hay trimming rope. When replacing the hay trimming rope, simply rotate the baffle to the state where it no longer restricts the hook to remove the hook and the hay trimming rope attached to it, and then reinstall a new hook and hay trimming rope. Maintenance and replacement are more convenient.

[0026] In summary, the left wheel assembly can be installed in the left mounting slot of the left support, and the right wheel assembly in the right mounting slot of the right support, thus enabling easy mowing operations supported by both the left and right wheels. Alternatively, the left wheel assembly can be installed in the upper left mounting slot of the left support, and the right wheel assembly in the upper right mounting slot of the right support, enabling easy trimming operations supported by either the left or right wheel. During trimming operations, only the left wheel assembly supporting the machine head needs to be installed in the upper left mounting slot. The right wheel assembly can then be installed in either the right or upper right mounting slot. Installing the right wheel assembly in the right mounting slot allows for more effortless wall support when there is a wall present. For edge trimming, the left and right wheel assemblies are interchanged in the same way. Then, the left wheel assembly can be easily removed by pressing the left unlock button, and the right wheel assembly can be removed in the same way, thus enabling grass cutting or edge trimming operations with the head suspended. Alternatively, the left wheel assembly can be installed in the left mounting slot, and the right wheel assembly can be installed in the upper right mounting slot for grass cutting operations. This is mainly suitable for situations where there are walls or other supports along the edge of the lawn to be trimmed, allowing for more effortless grass cutting operations. Various usage modes can be met, and you can freely choose the usage mode you need. The process of switching modes can be achieved simply by pressing the left and right unlock buttons, and the modes can be switched quickly. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of the grass trimmer in the grass trimming state in an embodiment of this application; Figure 2 This is a schematic diagram of the trimming state of the lawn mower in an embodiment of this application; Figure 3 This is an exploded view of the rotating structure in the embodiments of this application; Figure 4 This is a schematic diagram of the installation structure of the rotating sleeve and aluminum tube in the embodiments of this application; Figure 5 This is an exploded view of the two-stage adjustable connection structure in the embodiments of this application; Figure 6 This is a schematic diagram of the limiting sleeve in the embodiments of this application; Figure 7 This is a schematic diagram of half of the structure of the rotating sleeve in the embodiments of this application; Figure 8 This is an exploded view of the machine head and the left wheel assembly and the right wheel assembly in the embodiments of this application; Figure 9 This is an exploded view of the left wheel assembly and the left bracket in the embodiments of this application; Figure 10 This is a schematic diagram of the left support structure in an embodiment of this application. Figure 1 ; Figure 11 This is a schematic diagram of the structure of the left unlock button cover in an embodiment of this application; Figure 12 This is a partial structural diagram of the left support in an embodiment of this application; Figure 13 This is a schematic diagram of the installation structure of the left unlock button and the left wheel frame in an embodiment of this application; Figure 14 This is a schematic diagram of the left support structure in an embodiment of this application. Figure 2 ; Figure 15 This is a schematic diagram of another embodiment of the left wheel frame in this application; Figure 16 This is a schematic diagram of another embodiment of the left wheel frame in this application. Figure 17 This is a top view of the grass trimming head in the embodiments of this application; Figure 18 This is an exploded view of the grass-cutting head in the embodiments of this application; Figure 19 This is a top view of the hay-trimming head in the embodiments of this application after it has been rotated relative to the hay-trimming rope.

[0028] Explanation of reference numerals in the attached drawings: 1. Head; 12. Left wheel assembly; 121. Left wheel frame; 1211. Left structural groove; 1212. Left height adjustment limit groove; 1213. Left anti-foolproof groove; 1214. Left external height adjustment groove; 122. Left wheel; 123. Left cantilever column; 124. Left mounting protrusion; 125. Bearing; 13. Right wheel assembly; 14. Left bracket; 141. Left mounting groove; 142. Upper left cantilever block; 143. Guide column; 15. Right bracket; 161. Left unlock button cover; 1611. Left unlock slide; 1612. Restriction protrusion; 1613. Guide slide; 1614. Lower left cantilever block; 162. Left unlock button ; 1621, Guide rail; 1622, Spring abutment plate; 1623, Button block; 1624, Cross protrusion; 1625, Structural cover plate; 1626, Guide waist-shaped hole; 163, Left locking block; 164, Left spring; 17, Left structural block; 171, Left locking hole; 172, Left anti-foolproof boss; 21, Handle; 22, Auxiliary handle; 221, Grip part; 222, Fixing part; 223, Grip hole; 23, Aluminum tube; 231, Positioning plane; 232, Locking hole; 24, Rotating sleeve; 241, First limit ring protrusion; 242, Waist-shaped hole; 243, Annular abutment protrusion; 27, Rotating sleeve push button spring; 28, Limit push button; 281. Friction texture; 282. Force-applying protrusion; 29. ​​Positioning protrusion; 210. Limiting sleeve; 2101. Second limiting ring protrusion; 2102. U-shaped deformation groove; 2103. Locking plate; 2104. Release protrusion; 2105. Locking protrusion; 211. Positioning groove; 212. Covering sleeve; 213. Button sleeve; 214. Base plate; 3. Trimmer head; 31. Trimmer rope; 32. Hook; 321. Pin hole; 322. Structural hole; 323. Overhanging end face; 33. Trimmer head body; 331. Mounting hole; 332. Mounting groove; 333. Hook mounting groove; 334. Abutting surface; 335. Grooved structural surface; 337. Installation 3371. Waveplate stepped surface; 3372. Waveplate protrusion; 338. Structural rib; 3391. Rotating groove; 3392. Snap-fit ​​groove; 3393. Locking surface; 34. Pin; 35. Baffle; 351. Mounting part; 352. Covering part; 3521. Operating protrusion; 36. Wave-shaped pad; 37. Flat washer; 38. Self-tapping screw; 39. Positioning protrusion; 310. Positioning recess; 311. Replacement part; 4. Mounting bracket; 5. Corner block; 6. Upper left mounting groove; 61. Upper left structural block; 7. Upper left locking block; 71. Associated cylinder; 72. Locking protrusion; 73. Associated waist-shaped hole; 81. Left wave block; 82. Left wave spring. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-19 This application will be described in further detail.

[0030] This application discloses a brush cutter that can simultaneously perform grass cutting and trimming with multiple adjustable settings.

[0031] Reference Figure 1 and Figure 2 This is a brush cutter that can simultaneously perform mowing and trimming with multiple adjustable speeds. It includes a head 1, a rotating sleeve 24, an aluminum tube 23, a handle 21, a left wheel assembly 12, a right wheel assembly 13, and a mowing head 3. The rotating sleeve 24 is installed on the head 1 for mounting one end of the aluminum tube 23. The aluminum tube 23 extends out of the head 1 for mounting the handle 21. An auxiliary handle 22 is also installed on the aluminum tube 23. The auxiliary handle 22 is used to hold and operate the brush cutter in conjunction with the handle 21. The left wheel assembly 12 and the right wheel assembly 13 are respectively installed on both sides of the head 1 to support the head 1 for mowing operations. The left wheel assembly 12 and the right wheel assembly 13 can also be installed above the sides of the head 1 for suspended mowing or trimming operations. The mowing head 3 is installed below the head 1, and the grass is trimmed by rotating the mowing head 3.

[0032] The rotating sleeve 24 is rotatably mounted on the machine head 1 at one end, and open at the other end for the aluminum tube 23 to be installed. The aluminum tube 23 and the rotating sleeve 24 are connected through a two-stage adjustable connection structure. Specifically, the rotation axis of the rotating sleeve 24 extends in the left and right direction. The left wheel assembly 12 and the right wheel assembly 13 are respectively located on the left and right sides of the machine head 1. That is, the aluminum tube 23 with the rotating sleeve 24 can be rotated up and down relative to the machine head 1. At the same time, the axis of the rotating sleeve 24 is perpendicular to the rotation axis of the rotating sleeve 24, and the rotation axis of the rotating sleeve 24 is perpendicular to the rotation axis of the grass trimming head 3. The two-stage adjustable connection structure connects the aluminum tube 23 and the rotating sleeve 24. The aluminum tube 23 and the rotating sleeve 24 can rotate relative to each other and be fixed in two states. The stable state of the aluminum tube 23 is the state where the handle 21 is comfortably held. Then, the machine head 1 is rotated so that the grass trimming head 3 is facing down to perform the trimming operation. If the machine head 1 is rotated so that the grass trimming head 3 is facing the horizontal side, the edge trimming operation can be performed.

[0033] A handle 21 is installed at the end of the aluminum tube 23 away from the rotating sleeve 24. An auxiliary handle 22 is installed on the aluminum tube 23 near the handle 21. The auxiliary handle 22 includes a gripping part 221 and a fixing part 222. The fixing part 222 is fitted and fixed to the aluminum tube 23. The gripping part 221 is rotatably mounted on the fixing part 222. The gripping part 221 is frame-shaped and has a gripping hole 223 for gripping. The opening of the gripping hole 223 faces the handle 21. The rotation direction of the gripping part 221 is consistent with the orientation of the gripping hole 223. That is, the opening direction of the gripping hole 223 is always tangent to the rotation direction of the gripping part 221. The axis of gripping the gripping part 221 is perpendicular to the axis of gripping the handle 21. The rotation axis of the gripping part 221 is parallel to the rotation axis of the rotating sleeve 24.

[0034] The rotating sleeve 24 is provided with a cover sleeve 212. The cover sleeve 212 extends away from the aluminum tube 23 in the direction of the rotating sleeve 24. The cover sleeve 212 extends and separates the grass trimmer head 3 and the handle 21 on the grass trimmer. That is, when the grass trimmer head 3 is facing down, the cover sleeve 212 also extends downward.

[0035] Reference Figure 1 , Figure 3 and Figure 4 The rotating sleeve 24 is assembled from two parts, left and right, and fixed with screws. The two parts of the rotating sleeve 24 have protruding protrusions on their lower sides to form a whole and slide and cooperate with the shielding sleeve 212, so that the rotating sleeve 24 can be further reinforced after the shielding sleeve 212 is fixed on the rotating sleeve 24.

[0036] Reference Figure 3-7 The two-stage adjustable connection structure includes a limiting sleeve 210, a button sleeve 213, and a rotating sleeve push button spring 27. The rotating sleeve 24 is assembled from two parts on both sides of the aluminum tube 23 and fixed by self-tapping screws 38. The rotating sleeve push button spring 27 is a helical spring and is fitted onto the aluminum tube 23. The limiting sleeve 210 and the button sleeve 213 are also fitted onto the aluminum tube 23. At the same time, the limiting sleeve 210, the button sleeve 213, and the rotating sleeve push button spring 27 are also embedded inside the rotating sleeve 24. That is, the limiting sleeve 210, the button sleeve 213, and the rotating sleeve push button spring 27 are located between the outer wall of the aluminum tube 23 and the inner wall of the rotating sleeve 24. The rotating sleeve 24 has a first protruding part inside. The limiting ring protrusion 241 and the outer wall of the limiting sleeve 210 are provided with a second limiting ring protrusion 2101. There are two second limiting ring protrusions 2101, which are spaced apart. The space between the two second limiting ring protrusions 2101 allows the first limiting ring protrusion 241 to be inserted, so that the limiting sleeve 210 cannot move along the axial direction inside the rotating sleeve 24. In another embodiment, two first limiting ring protrusions 241 can also be provided, and the second limiting ring protrusion 2101 is located between the two first limiting ring protrusions 241 to form a limiting operation. In this embodiment, the method of using two second limiting ring protrusions 2101 is preferred.

[0037] Meanwhile, a corner block 5 is provided between the two second limiting ring protrusions 2101. The first limiting ring protrusion 241 abuts against the corner block 5 to restrict the limiting sleeve 210 from rotating relative to the rotating sleeve 24. The rotation stroke of the limiting sleeve 210 relative to the rotating sleeve 24 is 90 degrees. That is, during the rotation of the aluminum tube 23 with the limiting sleeve 210, when the corner block 5 abuts against the first limiting ring protrusion 241, the aluminum tube 23 reaches the corresponding position. Then, the aluminum tube 23 reverses to the corner block 5 and abuts against the first limiting ring protrusion 241 again to reach another position, corresponding to the grass-cutting state and the trimming state respectively. The rotation angle during this process is 90 degrees.

[0038] The aluminum tube 23 has a positioning plane 231 along its length. In this embodiment, there are two positioning planes 231, which are spaced 180 degrees apart around the circumference of the aluminum tube 23. The positioning planes 231 are formed together with the aluminum tube 23 during its forming process, meaning that the wall thickness of the aluminum tube 23 remains approximately consistent throughout. The inner wall of the limiting sleeve 210 is adapted to the aluminum tube 23. The limiting sleeve 210 has a U-shaped deformation groove 21 that runs through the inside and outside of the positioning plane 231. 02 A locking plate 2103 is formed. The locking plate 2103 protrudes from the plate surface opposite to the aluminum tube 23 and is provided with a release protrusion 2104. The locking plate 2103 protrudes from the plate surface facing the aluminum tube 23 and is provided with a locking protrusion 2105. The aluminum tube 23 has a locking hole 232 on the positioning plane 231 for the locking protrusion 2105 to be inserted. The connection between the aluminum tube 23 and the limiting sleeve 210 is achieved by the two locking protrusions 2105 being inserted into the locking hole 232.

[0039] The aforementioned release protrusion 2104 is part of the second limiting ring protrusion 2101 away from the button sleeve 213, that is, the U-shaped deformation groove 2102 also divides the second limiting ring protrusion 2101, and the locking plate 2103 is a flat plate with a thickness less than the wall thickness of the limiting sleeve 210, thereby improving the elastic deformation capability of the locking plate 2103.

[0040] The button sleeve 213 is slidably installed inside the rotating sleeve 24, and the button sleeve 213 is located at the end of the limiting sleeve 210 facing the handle 21. The limiting sleeve 210 and the button sleeve 213 are respectively provided with mutually cooperating positioning protrusions 29 and positioning grooves 211. The positioning protrusions 29 are matched with two positioning grooves 211 spaced 90 degrees apart. In this embodiment, there are two positioning protrusions 29. The two positioning protrusions 29 are arranged 180 degrees apart around the aluminum tube 23. There are four positioning grooves 211. Adjacent positioning grooves 211 are arranged 90 degrees apart around the aluminum tube 23. The positioning protrusions 29 are provided on the button sleeve 213, and the positioning grooves 211 are provided on the limiting sleeve 210. The positioning protrusions 29 are inserted into the positioning grooves 211 along the sliding direction of the button sleeve 213, so as to realize the mutual locking between the button sleeve 213 and the limiting sleeve 210.

[0041] The outer wall of the button sleeve 213 is provided with a base plate 214. The length of the base plate 214 is greater than the length of the button sleeve 213. The base plate 214 has a protruding limit push knob 28. The rotating sleeve 24 has an exposed waist-shaped hole 242 for the limit push knob 28 to slide. The limit push knob 28 is located in the waist-shaped hole 242 and can move in the waist-shaped hole 242 according to the sliding direction of the button sleeve 213 in the rotating sleeve 24. No matter how the limit push knob 28 slides in the waist-shaped hole 242, the base plate 214 always covers the waist-shaped hole 242. Thus, while operating the button sleeve 213 outside the rotating sleeve 24 through the limit push knob 28, the internal space of the rotating sleeve 24 is protected to a certain extent.

[0042] The aforementioned substrate 214 and limiting pusher 28 are provided in twos. The two limiting pushers 28 are arranged circumferentially around the aluminum tube 23 at 180-degree intervals. Two waist-shaped holes 242 are provided, and the two waist-shaped holes 242 correspond one to one of the two limiting pushers 28. In this embodiment, a waist-shaped hole 242 is provided at the middle position of the two parts of the rotating sleeve 24.

[0043] Meanwhile, the outer wall of the aforementioned limiting push knob 28 is also provided with friction texture 281 to improve friction. The outer wall of the limiting push knob 28 also has a force-applying protrusion 282 to further facilitate the application of force. In a further embodiment, the force-applying protrusion 282 can also be cylindrical, so that the button sleeve 213 can be slid and unlocked by hooking the cylindrical force-applying protrusion 282 with two fingers.

[0044] The inner wall of the rotating sleeve 24 is also provided with an annular abutting protrusion 243. The annular abutting protrusion 243 is located outside the end of the button sleeve 213 away from the limiting sleeve 210. The rotating sleeve push button spring 27 is clamped between the end of the button sleeve 213 and the annular abutting protrusion 243, so that the button sleeve 213 always has a tendency to move towards the limiting sleeve 210.

[0045] The aforementioned handle 21 is equipped with a switch to control the start and stop of the lawn mower and to provide a lithium battery for installation or external power supply, while the hollow aluminum tube 23 is used for power supply lines and control lines to pass through into the head 1 for power supply and operation.

[0046] Reference Figure 1 and Figure 8 The structures of the left wheel assembly 12 and the right wheel assembly 13 are symmetrical relative to the machine head 1. The machine head 1 also has symmetrically arranged left brackets 14 for mounting the left wheel assembly 12 and right brackets 15 for mounting the right wheel assembly 13 on both sides. The left wheel assembly 12 can be mounted on the side and top of the left bracket 14, and the right wheel assembly 13 can be mounted on the side and top of the right bracket 15. The left bracket 14 is equipped with a left unlocking mechanism, which, through its cooperation with the left wheel assembly 12, allows for quick mounting and dismounting of the left wheel assembly 12 on the side of the left bracket 14. The left bracket 14 also has an upper left unlocking mechanism, which, through its cooperation with the left wheel assembly 12, allows for quick mounting and dismounting of the left wheel assembly 12 on the side of the left bracket 14. The wheel assembly 12 is quickly mounted and dismounted on the left support 14. The right support 15 is equipped with a right unlocking mechanism. The right unlocking mechanism cooperates with the right wheel assembly 13 to achieve quick mounting and dismounting of the right wheel assembly 13 on the side of the right support 15. The right support 15 is also equipped with an upper right unlocking mechanism. The upper right unlocking mechanism cooperates with the right wheel assembly 13 to achieve quick mounting and dismounting of the right wheel assembly 13 on the right support 15. The left support 14 and the right support 15 have the same structure. The left unlocking mechanism has the same structure as the right unlocking mechanism. The upper left unlocking mechanism has the same structure as the upper right unlocking mechanism. The left wheel assembly 12 and the right wheel assembly 13 have the same structure. That is, the structures on both sides of the machine head 1 are completely symmetrical.

[0047] Reference Figure 8 and Figure 9 Taking the left bracket 14, the left unlocking mechanism, the upper left unlocking mechanism, and the left wheel assembly 12 as examples, the left wheel assembly 12 includes a left wheel frame 121 and a left wheel 122 rotatably mounted on the left wheel frame 121. The left wheel frame 121 is T-shaped slider in a vertical state. A left overhang post 123 is provided on the narrower end face of the left wheel frame 121. A left mounting post 124 is provided on the left overhang post 123 coaxially. A bearing 125 is installed in the middle of the hub of the left wheel 122 and is fitted onto the left mounting post 124 through the bearing 125. At the same time, a washer is installed on the left mounting post 124 and a self-tapping screw 38 is threaded into it to restrict the left wheel 122 from disengaging from the left mounting post 124, so as to realize the rotatable mounting of the left wheel 122 on the left wheel frame 121.

[0048] Reference Figure 8-10 The left bracket 14 extends outward from the outer side of the head 1 in the shape of a long plate. A left mounting groove 141 is vertically opened in the middle of the side of the left bracket 14 away from the head 1. The left mounting groove 141 allows the left wheel frame 121 to slide vertically and is fitted with a T-shaped structure to achieve the purpose of preventing the left wheel frame 121 from falling off the left bracket 14 in the horizontal direction. The left unlocking mechanism includes a left unlocking button cover 161, a left unlocking button 162, a left locking block 163 and a left spring 164. The bottom of the left bracket 14 with the left mounting groove 141 is open to form a space for the left unlocking button cover 161 to be installed. The lower side of the bottom wall of the left mounting groove 141 is open. The left unlocking button cover 161 is fixed to the left bracket 14 with screws and its side wall is part of the bottom wall of the left mounting groove 141. That is, the left unlocking button cover 161 is part of the left bracket 14 to form the left mounting groove 141.

[0049] Reference Figure 9 , Figure 11 and Figure 12The left unlock button cover 161 has a left unlock groove 1611 on its upper side wall facing the left bracket 14 for sliding installation of the left unlock button 162. The left unlock button 162 is in the shape of a long strip. The left unlock button cover 161 has protruding protrusions on both sides of the left unlock button 162 in the width direction, thereby forming the aforementioned left unlock groove 1611 between the two protrusions. A guide rail 1621 is provided with a downward protrusion in the middle of the bottom wall of the left unlock button 162. The guide rail 1621 extends along the length of the left unlock button 162. Extending outwards, the bottom of the left unlocking slide groove 1611 is provided with a limiting protrusion 1612. The limiting protrusion 1612 extends along the length direction of the left unlocking button cover 161. There are two limiting protrusions 1612, and a guide slide groove 1613 is formed between the two limiting protrusions 1612. When the left unlocking button 162 is installed on the left unlocking button cover 161, the guide slide rail 1621 at the bottom of the left unlocking button 162 is placed into the guide slide groove 1613 to realize the sliding guidance of the left unlocking button 162.

[0050] One end of the left unlock button 162 is located inside the left unlock slide groove 1611, and a spring abutment plate 1622 protrudes from its upper wall. The other end of the left unlock button 162 is located outside the component formed by the left unlock button cover 161 and the left bracket 14, and a button block 1623 protrudes from its upper wall. A hole is formed between the left unlock button cover 161 and the left bracket 14 for the button block 1623 to slide in and out. A cross protrusion 1624 protrudes from the surface of the spring abutment plate 1622 away from the surface of the button block 1623. The left spring 164... A helical spring is used. One end of the left spring 164 is fitted onto the cross protrusion 1624, and the other end extends out. After the left unlock button cover 161 is installed on the left bracket 14, the end of the left spring 164 away from the cross protrusion 1624 abuts against the inner wall of the left bracket 14. Thus, the left spring 164 pushes the button block 1623 on the left unlock button 162 to tend to extend out of the left bracket 14. Pressing the button block 1623 into the left bracket 14 can push the left unlock button 162 to squeeze the left spring 164 and move it.

[0051] Reference Figure 10-12A structural cover plate 1625 protrudes from the left unlock button 162 towards the left mounting groove 141. The top of the structural cover plate 1625 protrudes from the left locking block 163 towards the left mounting groove 141. The left locking block 163 extends into the left mounting groove 141. A lower left cantilever block 1614 extends from the left mounting groove 141. A higher left cantilever block 142 extends from the left mounting groove 141. The upper left cantilever block 142 and the lower left cantilever block 1614 abut against each other to form a left structural block 17. A left structural groove 1211 is vertically opened on the end face of the left wheel frame 121 facing the left bracket 14. The left structural block 17 slides and engages with the left structural groove 1211. The left locking block 163 is located between the lower left cantilever block 1614 and the upper left cantilever block 142. The left structural block 17 has a left locking hole 171 on the end face facing the button block 1623 for the left locking block 163 to slide out. In this embodiment, the left locking hole 171 is opened on the upper left cantilever block 142. The lower part of the left locking hole 171 is open and closed by the lower left cantilever block 1614. That is, the left locking block 163 is located above the lower left cantilever block 1614 and moves above the lower left cantilever block 1614. At the same time, the left bracket 14 has a notch at the bottom of the left mounting groove 141 that connects to the left locking hole 171, so that the left locking block 163 can extend from the left structural block 17 into the left mounting groove 141 from the left locking hole 171.

[0052] Reference Figure 9 , Figure 10 and Figure 13 The left wheel frame 121 has a left height adjustment limiting groove 1212 on the groove wall of the left structural groove 1211. The left height adjustment limiting groove 1212 faces the left locking hole 171. The left locking block 163 slides in the left bracket 14 along the width direction of the left mounting groove 141. The left spring 164 pushes the left unlock button 162, thereby engaging the left locking block 163 into the left height adjustment limiting groove 1212 and restricting the left wheel frame 121 from sliding vertically away from the left bracket 14. The left unlock button 162 slides under pressure and pushes the left locking block 163 to compress the left spring 164 and disengage from the left height adjustment limiting groove 1212. There are multiple left height adjustment limiting grooves 1212. In this embodiment, there are three. The three left height adjustment limiting grooves 1212 are vertically spaced along the left wheel frame 121.

[0053] The bottom of the left structural groove 1211 is vertically provided with a left anti-fooling groove 1213. The left bracket 14 is provided with a left anti-fooling boss 172 that slides and engages with the left anti-fooling groove 1213 on the end face of the left structural block 17. That is, the left anti-fooling boss 172 is located in a non-middle position of the left structural block 17, so that only the left wheel frame 121 can be installed on the left bracket 14 when the left height adjustment limit groove 1212 corresponds to the left locking block 163. The left anti-fooling boss 172 is partly located on the upper left cantilever block 142 and partly located on the lower left cantilever block 1614.

[0054] The mutual restraint between the left locking block 163 and the left bracket 14 restricts the left locking block 163 from extending a certain distance beyond the left locking hole 171, thereby preventing the left unlocking button 162 from detaching from the left bracket 14 and the left unlocking button cover 161. Furthermore, the left bracket 14 is provided with a guide post 143 protruding vertically toward the left unlocking button cover 161. The left unlocking button 162 has a guide waist-shaped hole 1626 through which the guide post 143 passes. The guide waist-shaped hole 1626 is opened along the sliding direction of the left unlocking button 162. The guide post 143 is also used to fix the left unlocking button cover 161 with screws. By restricting the left unlocking button 162 within the guide waist-shaped hole 1626, the left unlocking button 162 will not detach from the space between the left bracket 14 and the left unlocking button cover 161. Only the button block 1623 is located on the outside for operating the left unlocking button 162.

[0055] Reference Figure 9 , Figure 10 and Figure 14 The upper side wall of the left bracket 14 is also horizontally provided with an upper left mounting groove 6 for the horizontal sliding installation of the left wheel frame 121. The upper left mounting groove 6 is opened from the side where the rotating sleeve 24 is set on the machine head 1 along the width direction of the left bracket 14 to the other side, but does not penetrate the left bracket 14. The left wheel frame 121 and the upper left mounting groove 6 are also matched by a T-shaped structure. The upper left unlocking mechanism borrows most of the structure of the left unlocking mechanism, that is, the upper left unlocking mechanism and the left unlocking mechanism are used together. The upper left unlocking mechanism includes an upper left locking block 7. The upper left unlocking mechanism is obtained by replacing the left locking block 163 of the left unlocking mechanism with the upper left locking block 7. The upper left locking block 7 is slidably installed in the left bracket 14, and one end of the upper left locking block 7 is located above the left unlocking button 162, and the other end extends towards the upper left mounting groove 6. The sliding direction of the upper left locking block 7 is perpendicular to the sliding direction of the left unlocking button 162. The upper left locking block 7 has a related cylinder 71 protruding from the left unlocking button 162. 162 has an associated oblong hole 73 for mounting the associated cylinder 71. The associated oblong hole 73 is inclined along the sliding direction and width direction of the left unlock button 162. The left unlock button 162 slides under pressure and compresses the left spring 164, which in turn drives the associated cylinder 71 and causes the upper left locking block 7 to disengage from the left height adjustment limit groove 1212. The bottom of the upper left mounting groove 6 also has a protruding upper left structural block 61 to fit the left structural groove 1211 on the left wheel frame 121. The upper left structural block 61 also has a left anti-fooling boss 172 protruding out. The upper left locking block 7 has a locking protrusion 72 protruding from the upper side wall of one end of the upper left mounting groove 6. The upper left bracket 14 has a groove in the inner top wall for the upper left locking block 7 to slide and install. As the upper left locking block 7 slides, the locking protrusion 72 can extend out of the upper left structural block 61 and enter the upper left mounting groove 6. When the left wheel frame 121 is installed in the upper left mounting groove 6, the locking protrusion 72 can extend into the left height adjustment limit groove 1212 for locking.

[0056] Reference Figure 8 A mounting bracket 4 is fixed on the machine head 1. The mounting bracket 4 extends outwards from both sides of the machine head 1. The left bracket 14 and the right bracket 15 are detachably installed on the extended part of the mounting bracket 4. Specifically, one end of the left bracket 14 and the right bracket 15 is horizontally slid into the mounting bracket 4 and tightened with screws. When it is necessary to remove the left bracket 14 and the right bracket 15, the corresponding screws are removed to disassemble the left bracket 14 and the right bracket 15.

[0057] Reference Figure 15 and Figure 16 In a further embodiment, the left wheel assembly 12 also includes a left sway block 81 and a left sway spring 82. The left sway block 81 is vertically slidably mounted on the left wheel frame 121. The left sway block 81 is used for mounting the left wheel 122. The left sway spring 82 is located above the left sway block 81 and pushes the left sway block 81 from top to bottom. At this time, the left wheel assembly 12 can be infinitely adjusted in height by manually applying downward pressure. The right wheel assembly 13 can be equipped with an infinitely adjustable height function like the left wheel assembly 12, or the structure of the right wheel assembly 13 can remain unchanged, and only the infinitely adjustable height function of the left wheel assembly 12 can be added. At this time, in conjunction with the left wheel 122, fine height adjustment can be performed at the edge of the lawn or at different height boundaries for better adaptation. The multi-level adjustment, combined with the infinitely adjustable height of the left wheel assembly 12 itself, allows the left wheel 122 and the right wheel to be adjusted to different levels first, and then infinitely adjusted by applying force. Since the applied force generally changes very slightly, it needs to be combined with the multi-level adjustment itself to achieve this.

[0058] Furthermore, the left wheel frame 121 has left height adjustment limiting grooves 1212 on both sides of the groove wall of the left structural groove 1211, and a left outer height adjustment groove 1214 is formed on the outer wall of the left wheel frame 121. The left outer height adjustment groove 1214 and the left height adjustment limiting groove 1212 are staggered in the height direction of the left wheel frame 121, and adjacent left outer height adjustment grooves 1214 and left height adjustment limiting grooves 1212 are formed on the same solid piece. That is, the adjacent groove walls of adjacent left outer height adjustment grooves 1214 and left height adjustment limiting grooves 1212 are located on the same solid piece. The axis of the left wheel 122 is located at one-third of the height direction of the left wheel frame 121. At this time, the left structural block 17 and the upper left structure Block 61 and left structural groove 1211 no longer have matching left anti-foolproof boss 172 and left anti-foolproof groove 1213, so that the left wheel assembly 12 and right wheel assembly 13 can be used interchangeably. The left wheel assembly 12 can also be installed on the left bracket 14 in both directions. Correspondingly, there are two left wave springs 82, which are respectively set above and below the left wave block 81, so that the left wheel assembly 12 can be infinitely adjusted regardless of whether it is installed in the forward or reverse direction. In this case, it is preferable that the right wheel assembly 13 does not have the infinitely adjustable function. As needed, the left wheel assembly 12 and right wheel assembly 13 can be installed interchangeably to adapt to the side that needs infinitely adjustable height.

[0059] It should be noted that the aforementioned left outer height adjustment groove 1214 can also replace the function of the left height adjustment limit groove 1212. When both the left locking block 163 and the upper left locking block 7 are engaged with the left outer height adjustment groove 1214, the left structural block 17 and the left structural groove 1211 are no longer needed. The direction in which the left unlocking button 162 moves the upper left locking block 7 is also reversed. That is, when the left unlocking button 162 is pressed and moved, the upper left locking block 7 retracts towards the left unlocking button 162. It is only necessary to change the opening direction of the guide waist-shaped hole 1626. The position of the left locking block 163 is moved forward to adapt to the left outer height adjustment groove 1214. Similarly, the left height adjustment limit groove 1212 can be engaged with the left locking block 163, and the upper left locking block 7 can be engaged with the left outer height adjustment groove 1214, or the two can be engaged in opposite ways. All of these can achieve the function required by this embodiment.

[0060] Reference Figure 17-19 The hay trimmer 3 includes a hay trimmer body 33, a hook 32, a hay trimming rope 31, and a locking assembly. The hay trimmer body 33 is installed at the output end of the machine head 1. In this embodiment, the hay trimmer body 33 is disc-shaped and has a mounting hole 331 coaxially formed. An output shaft extends from the output end of the machine head 1. The output shaft passes through the mounting hole 331 and a nut is installed to install the hay trimmer body 33 on the machine head 1. Then, the rotation of the output shaft drives the hay trimmer body 33 to rotate together. The hay trimming rope 31 is installed on the hay trimmer body 33 through the hook 32. Then, the locking assembly secures the hook 32 to the hay trimmer body 33 and rotates together, ultimately achieving the rotation of the hay trimming rope 31 to trim the hay.

[0061] The hook 32 has a circular plate shape at one end and a square plate shape at the other end, with the two ends of the hook 32 connected by arcs, resulting in an overhanging end face 323 at one end and a cylindrical surface at the other end. The length of the overhanging end face 323 is less than the diameter of the circular plate portion of the hook 32. A pin hole 321 is coaxially formed on the circular plate portion of the hook 32. Simultaneously, a structural hole 322 is also formed between the pin hole 321 and the overhanging end face 323. In this embodiment, it is preferable that the diameter of the structural hole 322 is smaller than the diameter of the pin hole 321. There are two straw ropes 31, which are installed side-by-side and spaced apart on the hook 32. The cantilever end face 323, that is, the grass trimming rope 31 extends out from the cantilever end face 323 of the hook 32. Specifically, the two grass trimming ropes 31 are connected as one piece, that is, the two grass trimming ropes 31 are formed by bending the same grass trimming rope 31. The hook 32 is integrally injection molded to form a replacement part 311 in the bent part of the grass trimming rope 31. The two grass trimming ropes 31 are arranged in parallel. The part of the grass trimming rope 31 inside the hook 32 is curved, and the diameter of the arc of the grass trimming rope 31 extending inside the hook 32 is greater than the distance between the two grass trimming ropes 31. The end of the two grass trimming ropes 31 connected passes around the structural hole 322.

[0062] The hay trimmer body 33 is also coaxially provided with a circular mounting groove 332. The diameter of the mounting groove 332 is larger than the diameter of the mounting hole 331, that is, the mounting hole 331 is opened at the bottom of the mounting groove 332. The hay trimmer body 33 is also provided with a hook mounting groove 333 for the hook 32 to be installed. There are two hook mounting grooves 333, which are arranged 180 degrees apart around the hay trimmer body 33. Correspondingly, there are also two replacement parts 311 formed by the hook 32 and the hay trimming rope 31. The two replacement parts 311 are symmetrically installed in the two hook mounting grooves 333, so that the hay trimming rope 31 is suspended on both sides of the hay trimmer body 33.

[0063] The aforementioned hook mounting groove 333 penetrates the mounting groove 332 in the middle of the grass trimmer head body 33 and the outer wall, so that the hook mounting groove 333 has only two groove walls, which are respectively set as the abutment surface 334 and the slotted structure surface 335. The abutment surface 334 is located on the side opposite to the rotation direction of the grass trimmer head body 33 on the grass trimmer, while the slotted structure surface 335 is located on the other side. The slotted structure surface 335 extends towards the center of the mounting groove 332, while the extension direction of the abutment surface 334 is biased towards the tangential direction of the mounting groove 332.

[0064] The hay trimmer body 33 has a pin 34 protruding from the bottom of the hook mounting groove 333, which mates with the pin hole 321. The pin 34 can be integral with the hay trimmer body 33, or the bottom of the hook mounting groove 333 can have a hole for one end of the pin 34 to be inserted with an interference fit, and the other end to protrude. The pin hole 321 on the hook 32 allows the pin 34 to be inserted, so that the hook 32 rotates and fits onto the pin 34. Since the contact surface 334 is located on the side of the pin 34 opposite to the rotation direction of the hay trimmer body 33, when the hay trimmer body 33 rotates with the hay trimmer rope 31, if the hay trimmer rope 31 is obstructed by a hard object, the hay trimmer rope 31, along with the hook 32, rotates relative to the pin 34 and contacts the contact surface 334. At this time, the hay trimmer rope 31 can smoothly fit and contact the contact surface 334, and the contact surface 334 connects with the outer arc of the outer wall of the hay trimmer body 33.

[0065] When the hook 32 is installed on the pin 34, the pin 34 will not protrude from the surface of the hook 32.

[0066] The locking assembly includes a baffle 35, a wave-shaped washer 36, a flat washer 37, and a self-tapping screw 38. The baffle 35 includes a mounting part 351 and a blocking part 352. The mounting part 351 is rotatably mounted on the trimmer head body 33. Specifically, the trimmer head body 33 has a mounting post 337 protruding from the outer ring of the bottom of the mounting groove 332 for mounting part 351 to be fitted. The mounting post 337 is a stepped post, with the diameter of the bottom of the mounting post 337 being larger than the diameter of the top, and the stepped surface formed is connected to the bottom of the hook mounting groove 333 and located on the same plane. The lower part of the mounting post 337 integrally extends a structural rib 338. There are three structural ribs 338, which are spaced 90 degrees apart. The mounting post 337 is fitted with a mounting part 351. The mounting part 351 is cylindrical and has a stepped hole inside, forming a corrugated plate stepped surface 3371. The end of the mounting part 351 with a smaller hole diameter is fitted onto the mounting post 337. The top of the mounting post 337 has a corrugated plate protrusion 3372 with a smaller diameter, which is coaxially protruding. The corrugated plate pad 36 is fitted onto the corrugated plate protrusion 3372 and abuts against the corrugated plate stepped surface 3371. The flat washer 37 is located inside the mounting part 351 and above the corrugated plate pad 36. The self-tapping screw 38 passes through the flat washer 37 and the corrugated plate pad 36 in sequence and is driven into the mounting post 337, so that the baffle 35 is rotated and installed on the mounting post 337.

[0067] There are two mounting posts 337, and a locking assembly is installed on each of the two mounting posts 337. The two locking assemblies correspond one-to-one with the two replacement parts 311. The axes of the two mounting posts 337, the axes of the two pins 34, and the axes of the mounting holes 331 are located on the same plane.

[0068] The shielding part 352 is integrally suspended from the mounting part 351 and rotates synchronously with the mounting part 351. The shielding part 352 is fan-shaped and extends into the hook mounting groove 333. When the shielding part 352 rotates to the pin 34 position, the hook 32 is located between the shielding part 352 and the bottom of the hook mounting groove 333, thereby preventing the hook 32 from disengaging from the pin 34. The trimmer head body 33 has a rotating groove 3391 on one side of the slotted structure surface 335. The shielding part 352 can rotate through the rotating groove 3391 and enter the mounting groove 332, so that the shielding part 352 is in a state that no longer prevents the hook 32 from disengaging, and the trimmer head body 33 is in a state where the trimmer head body no longer obstructs the hook 32 from disengaging. The head body 33 also has a snap-fit ​​groove 3392 on one side of the contact surface 334. The bottom of the snap-fit ​​groove 3392 has a positioning protrusion 39. Only one wall of the snap-fit ​​groove 3392 is a locking surface 3393. The bottom surface of the blocking part 352 of the baffle 35 has a positioning recess 310. When the positioning protrusion 39 is engaged with the positioning recess 310, the blocking part 352 rotates to a state where the outer ring corresponds to the outer ring of the grass trimming head body 33. The blocking part 352 abuts against the locking surface 3393. At this time, the blocking part 352 is located above the pin 34. The depth of the rotating groove 3391 and the snap-fit ​​groove 3392 is less than the depth of the hook mounting groove 333.

[0069] An operation protrusion 3521 is provided on the surface of the shielding part 352 away from the grass trimmer body 33. The operation protrusion 3521 is located in the middle of the shielding part 352 and is connected to the mounting part 351, extending away from the mounting part 351.

[0070] In this embodiment, the grass trimmer 3 can also adopt other grass trimming ropes 31 that are easy to replace, in order to adapt to the situation where the grass trimming ropes 31 are more prone to breakage due to the diversification of functions and the possible changes in the usage scenarios.

[0071] The implementation principle of the brush cutter that can simultaneously perform mowing and trimming with multiple adjustable settings in this application embodiment is as follows: Depending on different needs, the left wheel assembly 12 and the right wheel assembly 13 can be removed by pressing the left unlock button 162 and the right unlock button, and then installed in the required vertical or horizontal position for mowing or trimming operations. Especially during trimming, to save effort, the right support 15 on one side can be removed along with the right wheel assembly 13. For users with greater strength, to facilitate the placement of the left wheel assembly 12 and the right wheel assembly 13, during suspended operation, the left wheel assembly 12 and the right wheel assembly 13 can still be stored above the left support 14 and the right support 15, respectively. For users with less strength, both the left support 14 and the right support 15 can be removed for even more effortless suspended operation. The overall brush cutter can adapt to various usage environments and users, offering greater versatility, simple operation, easy state switching, and multi-level, stepless height adjustment during use.

[0072] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A brush cutter capable of simultaneously mowing and trimming with multiple adjustable speeds, characterized in that: The machine includes a head (1) and a left wheel assembly (12) and a right wheel assembly (13) mounted on both sides of the head (1). The structures of the left wheel assembly (12) and the right wheel assembly (13) are symmetrical with respect to the head (1). The head (1) is also symmetrically provided with a left bracket (14) for mounting the left wheel assembly (12) and a right bracket (15) for mounting the right wheel assembly (13). The left wheel assembly (12) includes a left wheel frame (121) and a left wheel (122) rotatably mounted on the left wheel frame (121). The left bracket (14) is vertically provided with a left mounting groove (141) for vertically sliding the left wheel frame (121). The left bracket (14) is also horizontally provided with an upper left mounting groove (6) for horizontally sliding the left wheel frame (121). The left wheel frame (121), the left mounting groove (141), and the upper left mounting groove (6) are all connected. The mounting slots (6) are all fitted with T-shaped structures. The left bracket (14) is provided with a left unlocking mechanism and a left upper unlocking mechanism. The left unlocking mechanism includes a left unlocking button (162), a left locking block (163), and a left spring (164). The left wheel frame (121) is provided with a left height adjustment limit groove (1212). The left locking block (163) is slidably installed on the left bracket (14). The left spring (164) pushes the left locking block (163) to engage with the left height adjustment limit groove (1212) and restricts the vertical sliding of the left wheel frame (121). The left unlocking button (162) is slidably installed on the left bracket (14). The left unlocking button (162) is pressed and slides, pushing the left locking block (163) to compress the left spring (164) and disengage from the left height adjustment limit groove (1212). The left upper unlocking mechanism is similar in structure to the left unlocking mechanism and performs the same function.

2. The brush cutter and trimmer according to claim 1, which can simultaneously perform mowing and trimming and has multiple adjustable speeds, is characterized in that: The upper left mounting groove (6) is formed along the width direction of the left bracket (14) on the upper side wall of the left bracket (14). The left unlocking mechanism also includes a left unlocking button cover (161). The left unlocking button cover (161) has a left unlocking slide groove (1611) for mounting the left unlocking button (162). The left unlocking button (162) is located between the left mounting groove (141) and the upper left mounting groove (6). The bottom of the left bracket (14) is provided with a left unlocking button. The space for the button cover (161) is provided, and the left unlock button (162) is screwed to the bottom of the left bracket (14), thus restricting the left unlock button (162) within the left unlock slide groove (1611). One end of the left unlock button (162) is located within the left unlock slide groove (1611) and is provided with the left spring (164). The other end of the left unlock button (162) is located outside the left bracket (14). The left locking block (163) is provided on the left unlock button (162). 62) On the side facing the left mounting groove (141), the upper left unlocking mechanism includes an upper left locking block (7), which is slidably installed in the left bracket (14). One end of the upper left locking block (7) is located above the left unlocking button (162), and the other end extends toward the upper left mounting groove (6). The sliding direction of the upper left locking block (7) is perpendicular to the sliding direction of the left unlocking button (162). The upper left locking block (7) is positioned toward the left unlocking button (162). 62) A protruding associated cylinder (71) is provided. The left unlock button (162) has an associated waist-shaped hole (73) for the associated cylinder (71) to be installed. The associated waist-shaped hole (73) is inclined along the sliding direction and width direction of the left unlock button (162). The left unlock button (162) is pressed and slides, compressing the left spring (164), and drives the associated cylinder (71) to drive the upper left locking block (7) to disengage from the left height adjustment limit groove (1212).

3. The brush cutter and trimmer according to claim 2, which can simultaneously perform mowing and trimming and has multiple adjustable speeds, is characterized in that: The left mounting slot (141) extends vertically through the left bracket (14). There are multiple left height adjustment limit slots (1212). Multiple left height adjustment limit slots (1212) are vertically spaced along the left wheel frame (121). The upper left mounting slot (6) is located on the rear side of the machine head (1) in the forward direction.

4. The brush cutter and trimmer according to claim 1, which can simultaneously perform mowing and trimming and has multiple adjustable speeds, is characterized in that: It also includes a rotating sleeve (24) installed on the machine head (1), a handle (21), an aluminum tube (23) for mounting the handle (21), and a two-stage adjustable connection structure. The rotating sleeve (24) is for mounting the end of the aluminum tube (23) away from the handle (21). The two-stage adjustable connection structure includes a limiting sleeve (210) and a button sleeve (213). The limiting sleeve (210) is rotatably installed inside the rotating sleeve (24). The end of the aluminum tube (23) is slidably inserted into the rotating sleeve (24). The aluminum tube (23) is fixed to the limiting sleeve (210) and rotates synchronously. The button sleeve (213) is slidably installed inside the rotating sleeve (24) and is fitted onto the aluminum tube (23). The button sleeve (213) is located within the limiting sleeve (210). 0) At one end facing the handle (21), the limiting sleeve (210) and the button sleeve (213) are respectively provided with a positioning protrusion (29) and a positioning groove (211) that cooperate with each other. The positioning protrusion (29) is inserted into the positioning groove (211) along the sliding direction of the button sleeve (213). The outer wall of the button sleeve (213) is provided with a limiting pusher (28). The rotating sleeve (24) has an exposed waist-shaped hole (242) for the limiting pusher (28) to slide. There are two positioning protrusions (29). The two positioning protrusions (29) are arranged 180 degrees apart around the aluminum tube (23). There are four positioning grooves (211). The adjacent positioning grooves (211) are arranged 90 degrees apart around the aluminum tube (23).

5. The brush cutter and trimmer according to claim 1, which can simultaneously perform mowing and trimming and has multiple adjustable speeds, is characterized in that: It also includes a mounting bracket (4), which is mounted on the machine head (1). The mounting bracket (4) extends outwards on both sides of the machine head (1). The left bracket (14) and the right bracket (15) are detachably mounted on the extended portion of the mounting bracket (4).

6. The brush cutter and trimmer according to claim 1, which can simultaneously perform mowing and trimming and has multiple adjustable speeds, is characterized in that: The left wheel assembly (12) also includes a left wave block (81) and a left wave spring (82). The left wave block (81) is vertically slidably mounted on the left wheel frame (121). The left wave block (81) is for mounting the left wheel (122). The left wave spring (82) is located above the left wave block (81) and pushes the left wave block (81) from top to bottom.

7. The brush cutter and trimmer according to claim 3, which can simultaneously perform mowing and trimming and has multiple adjustable speeds, is characterized in that: The left wheel frame (121) has a vertically formed left structural groove (1211) on its end face facing the left bracket (14). The left locking block (163) is slidably mounted on the left bracket (14) along the width direction of the left mounting groove (141), and one end of the left locking block (163) extends out of the left mounting groove (141). The left height adjustment limit groove (1212) is formed on the groove wall of the left structural groove (1211), and the left wheel frame (121) has grooves on both sides of the groove wall of the left structural groove (1211). The left height adjustment limiting groove (1212) and the left outer height adjustment groove (1214) are provided on the outer side wall of the left wheel frame (121). The left outer height adjustment groove (1214) and the left height adjustment limiting groove (1212) are staggered in the height direction of the left wheel frame (121). The adjacent left outer height adjustment groove (1214) and the left height adjustment limiting groove (1212) are formed by sharing a single solid. That is, the adjacent groove walls of the adjacent left outer height adjustment groove (1214) and the left height adjustment limiting groove (1212) are located on the same solid at the top and bottom.

8. The brush cutter and trimmer according to claim 7, which can simultaneously perform mowing and trimming and has multiple adjustable speeds, is characterized in that: The axis of the left wheel (122) is located at one-third of the height of the left wheel frame (121).

9. The brush cutter and trimmer according to claim 4, which can simultaneously perform mowing and trimming and has multiple adjustable speeds, is characterized in that: It also includes an auxiliary handle (22), which is installed on the aluminum tube (23) and located between the handle (21) and the machine head (1). The auxiliary handle (22) is provided with a gripping hole (223) for holding, and the gripping hole (223) is set facing the handle (21). The auxiliary handle (22) includes a gripping part (221) and a fixing part (222). The fixing part (222) is installed on the aluminum tube (23), and the gripping part (221) is rotatably installed on the fixing part (222). The rotation direction of the gripping part (221) is consistent with the orientation of the gripping hole (223). The rotating sleeve (24) The inner wall is provided with a first limiting ring protrusion (241), and the outer wall of the limiting sleeve (210) is provided with a second limiting ring protrusion (2101). There are two second limiting ring protrusions (2101), which are spaced apart. The space between the two second limiting ring protrusions (2101) is for the first limiting ring protrusion (241) to be installed. A corner block (5) is provided between the two second limiting ring protrusions (2101). The first limiting ring protrusion (241) abuts against the corner block (5) to restrict the limiting sleeve (210) from rotating relative to the rotating sleeve (24), and the rotation stroke of the limiting sleeve (210) relative to the rotating sleeve (24) is 90 degrees.

10. The brush cutter and trimmer according to claim 1, which can simultaneously perform mowing and trimming and has multiple adjustable speeds, is characterized in that: It also includes a trimmer head (3), which is installed below the machine head (1). The trimmer head (3) includes a trimmer head body (33), a hook (32), a trimmer rope (31), and a locking assembly. The trimmer head body (33) is provided with a pin (34). The hook (32) has a pin hole (321) for inserting the pin (34). One end of the trimmer rope (31) is fixed to the hook (32), and the other end of the trimmer rope (31) extends into the machine head. In addition to the hook (32), the locking assembly includes a baffle (35), which includes a mounting part (351) and a blocking part (352). The mounting part (351) is rotatably mounted on the grass trimmer body (33). The blocking part (352) extends out of the mounting part (351) and rotates synchronously with the mounting part (351). The blocking part (352) rotates to the position of the pin (34) and restricts the hook (32) from disengaging from the pin (34).

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