Obstacle-clearing rake tooth assembly for lawn mowing machinery

Abstract

The present invention discloses an obstacle-clearing rake tooth assembly for a lawn mowing machine, comprising a mounting seat for mounting rake teeth; a rake tooth group for clearing obstacles and combing grass, the rake tooth group comprising a plurality of rake teeth, the plurality of rake teeth being arranged in parallel and side by side on the mounting seat, the end face shape of the rake tooth group on the side away from the mounting seat being one or more combinations of a circular arc surface, an inclined surface relative to the length direction of a single rake tooth, and a shape consisting of at least two inclined surfaces with a pointed end facing away from the mounting seat. The obstacle-clearing rake tooth assembly of the present invention is designed with respect to the shape of the front end face of the rake tooth group so that when a mobile vehicle is propelled, after the rake tooth group contacts an obstacle, the obstacle will move along the front end face of the rake tooth group toward the outside of the rake tooth group, and eventually the obstacle will detach from the rake tooth group from both sides of the rake tooth group, thereby preventing the obstacle from always being in front of the rake tooth group to hinder the propulsion of the mobile vehicle, and also preventing the rake teeth from being worn for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of lawn mowing, in particular to an obstacle-clearing rake tooth assembly of a lawn mowing machine. Background Art

[0002] Traditional lawn mowing machines have a mowing tool horizontally arranged at the bottom of a manual or electric mobile vehicle. The mowing tool rotates as the mobile vehicle moves to mow the grass that is higher than the mowing tool. Later, in order to protect the mowing tool and improve the mowing quality, obstacle clearing rake teeth were set below the mowing tool. The existing obstacle clearing rake teeth are placed horizontally below the mowing tool, and the rake teeth are horizontal and straight. The end surface of the entire front end of the rake tooth assembly is flush, which can not only push away larger obstacles such as stones, but also straighten some curved grass for easy mowing.

[0003] However, the defect of this equipment is that the front end of the rake tooth assembly is flat, and when the mobile vehicle moves forward, the rake tooth assembly can only push the obstacle forward, that is, the obstacle is always located in front of the rake tooth assembly. Although it can protect the pruning tool to a certain extent, the obstacle is always in front of the rake teeth and will always hinder the advancement of the mobile vehicle. When the number of obstacles increases during the forward process, the advancement of the mobile vehicle will be increasingly hindered, affecting the movement of the mobile vehicle. In addition, the front end of the rake teeth always collides or rubs with the obstacle, and the rake teeth are prone to damage due to long-term wear. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides an obstacle-clearing rake tooth assembly for a lawn mowing machine. The obstacle-clearing rake tooth assembly of the lawn mowing machine is designed with respect to the shape of the front end face of the rake tooth group, so that when the mobile vehicle is propelled, after the rake tooth group contacts an obstacle, the obstacle will move along the front end face of the rake tooth group toward the outside of the rake tooth group under the thrust of the rake tooth group, and eventually the obstacle will detach from the rake tooth group from the two side edges of the rake tooth group, thereby avoiding the obstacle always hindering the propulsion of the mobile vehicle in front of the rake tooth group, and also avoiding the rake teeth from being worn for a long time.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides an obstacle-clearing rake tooth assembly for a lawn mowing machine, comprising:

[0007] A mounting seat, the mounting seat being used for mounting the rake teeth;

[0008] A rake tooth group, which is used for clearing obstacles and combing grass. The rake tooth group includes multiple rake teeth, and the multiple rake teeth are arranged in parallel and side by side on a mounting seat. The end face shape of the rake tooth group on the side away from the mounting seat is one or more combinations of an arc surface, an inclined surface relative to the length direction of a single rake tooth, and a shape composed of at least two inclined surfaces with a pointed tip in a direction away from the mounting seat.

[0009] The obstacle-clearing rake tooth assembly of the lawn mowing machine of the present invention is designed with respect to the shape of the front end face of the rake tooth group, so that when the mobile vehicle is propelled, after the rake tooth group contacts an obstacle, the obstacle will move along the front end face of the rake tooth group toward the outside of the rake tooth group under the thrust of the rake tooth group, and eventually the obstacle will separate from the rake tooth group from the two side edges of the rake tooth group, thereby preventing the obstacle from always hindering the propulsion of the mobile vehicle in front of the rake tooth group, and also preventing the rake teeth from being worn for a long time.

[0010] In a further technical solution, a notch is provided at one end of the rake teeth away from the mounting seat to form the end face shape of the rake tooth group away from the mounting seat.

[0011] The notch at the end of the rake teeth makes the shape transition of the end surface of the rake tooth group smoother, which is more conducive to the obstacles sliding along the end surface to the two sides of the rake tooth group, and the obstacle removal effect is better.

[0012] In a further technical solution, the rake teeth include:

[0013] a fixing portion connected to the mounting seat and used to support the movable portion;

[0014] The movable part is detachably connected to an end of the fixed part away from the mounting seat.

[0015] The rake teeth are divided into a fixed part and a movable part. The movable part is detachable, so that the rake tooth group does not need to be replaced in the long-term use and maintenance process. Only the movable part that is severely worn needs to be replaced, which reduces the maintenance cost.

[0016] In a further technical solution, the movable portion includes:

[0017] A lower arc portion, wherein the lower arc portion is in a shape curved toward the ground and is used for clearing obstacles and combing low-lying grass;

[0018] The connecting portion is arranged at one end of the lower arc portion and is used to connect with the fixing portion.

[0019] The lower arc portion bends toward the ground, allowing the rake teeth to comb the grass over a wider range of heights and provide better trimming quality. At the same time, the curved lower arc portion can act as a buffer when colliding with an obstacle, reducing the impact on the fixed portion.

[0020] In a further technical solution, the movable part further includes:

[0021] The upper arc portion is in a curved shape facing in a direction opposite to the curvature of the lower arc portion, and is used to block obstacles lifted by the lower arc portion.

[0022] The setting of the upper arc portion can block obstacles lifted up by the curved lower arc portion, thereby preventing the obstacles from being lifted up toward the pruning tool, thereby providing good protection for the pruning tool.

[0023] In a further technical solution, the horizontal height of the top of the upper arc portion is higher than the horizontal height of the mowing tool of the lawn mowing machine.

[0024] The top of the upper arc goes around to the top of the trimming tool, and all obstacles flying from the front are blocked by the upper arc, which can maximize the protection of the trimming tool without affecting the combing effect of the rake teeth on the grass.

[0025] In a further technical solution, an upper arc mounting sleeve is provided at the bottom of the upper arc portion, a through cavity is provided inside the upper arc mounting sleeve, and the shape of the cavity matches the shape of the connecting portion.

[0026] By installing the upper arc part through the upper arc mounting sleeve, the instability problem caused by connecting two curved parts to the same connecting part can be avoided. At the same time, when the upper arc mounting sleeve, the connecting part and the nesting part are fixed together, the upper arc mounting sleeve can produce a squeezing effect on the connecting part, further enhancing the connection strength between the three.

[0027] In a further technical solution, the fixing portion is arranged tilted, and the horizontal height of one end of the fixing portion connected to the mounting seat is higher than the horizontal height of one end of the fixing portion away from the mounting seat.

[0028] The fixing portion is tilted so that in special circumstances, an obstacle entering between the fixing portion and the pruning tool can slide downward under the action of its own weight, avoiding continuous damage to the pruning tool, and the tilted fixing portion has a better supporting effect on the curved lower arc portion.

[0029] In a further technical solution, a nesting portion is provided at one end of the fixed portion away from the mounting seat and is connected to the movable portion through the nesting portion. A notch is provided on the nesting portion that matches the notch shape on the movable portion corresponding to the fixed portion, and the lengths of the movable portions of several of the rake teeth are equal.

[0030] By providing the nesting portion, the fixed portion and the movable portion are more closely connected. At the same time, the notch on the nesting portion allows the user to select or process the notch of the movable portion according to the shape of the notch of the nesting portion during maintenance, further facilitating maintenance.

[0031] In a further technical solution, the movable part is made of plastic.

[0032] The cost of movable parts made of plastic is lower, and it is easy to trim them to conform to standard shapes during maintenance. There is no need to stock movable parts of all shapes. When replacing, the new movable part can be trimmed according to the shape of the replaced movable part.

[0033] The beneficial effects are:

[0034] 1. The obstacle-clearing rake tooth assembly of the lawn mowing machine of the present invention is designed with respect to the shape of the front end surface of the rake tooth group, so that when the mobile vehicle is propelled, after the rake tooth group contacts an obstacle, the obstacle will move along the front end surface of the rake tooth group toward the outside of the rake tooth group under the thrust of the rake tooth group, and eventually the obstacle will detach from the rake tooth group from the two side edges of the rake tooth group, thereby preventing the obstacle from always being in front of the rake tooth group to hinder the propulsion of the mobile vehicle, and also preventing the rake teeth from being worn for a long time.

[0035] 2. The notch is opened at the end of the rake teeth to make the shape transition of the end surface of the rake tooth group smoother, which is more conducive to the obstacles sliding along the end surface to the two sides of the rake tooth group, and the obstacle removal effect is better.

[0036] 3. The rake teeth are divided into a fixed part and a movable part. The movable part is detachable, so that the rake teeth group does not need to be replaced during long-term maintenance. Only the movable part that is severely worn needs to be replaced, which reduces maintenance costs.

[0037] 4. The lower arc part is bent toward the ground, so that the rake teeth can comb the grass in a wider range of heights and the trimming quality is better. At the same time, the curved lower arc part can act as a buffer when colliding with obstacles, and the fixed part is less impacted.

[0038] 5. The setting of the upper arc part can block the obstacles picked up by the curved lower arc part, preventing the obstacles from being picked up towards the pruning tool, and having a good protective effect on the pruning tool.

[0039] 6. The top of the upper arc goes around to the top of the pruning tool, and all obstacles flying from the front are blocked by the upper arc, which can maximize the protection of the pruning tool without affecting the combing effect of the rake teeth on the grass.

[0040] 7. Installing the upper arc part through the upper arc mounting sleeve can avoid the instability problem caused by connecting two curved parts to the same connecting part. At the same time, when the upper arc mounting sleeve, the connecting part and the nesting part are fixed together, the upper arc mounting sleeve can produce an extrusion effect on the connecting part, further enhancing the connection strength between the three.

[0041] 8. The fixing part is tilted so that in special circumstances, obstacles between the fixing part and the pruning tool can slide downward under the action of their own weight, avoiding continuous damage to the pruning tool. The tilted fixing part also provides better support for the curved lower arc part.

[0042] 9. By setting up the nesting part, the fixed part and the movable part are more closely connected. At the same time, the notch opened on the nesting part makes it easier for the user to select or process the notch of the movable part according to the shape of the notch of the nesting part during maintenance, which further facilitates maintenance.

[0043] 10. The cost of plastic movable parts is lower, and it is easy to trim them to conform to the standard shape during maintenance. There is no need to stock movable parts of all shapes. When replacing, the new movable part can be trimmed according to the shape of the replaced movable part. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 1. It is a top view of the overall structure of the obstacle removal rake tooth assembly of the lawn mowing machine according to the first embodiment of the present invention;

[0045] Figure 2 2. It is a top view of the overall structure of the obstacle removal rake tooth assembly of the lawn mowing machine according to the second embodiment of the present invention;

[0046] Figure 3 1. It is a top view of the overall structure of the obstacle removal rake tooth assembly of the lawn mowing machine according to the third embodiment of the present invention;

[0047] Figure 4 1. It is a top view of the overall structure of the obstacle removal rake tooth assembly of the lawn mowing machine according to the fourth embodiment of the present invention;

[0048] Figure 5 1 is a top view of the overall structure of an obstacle removal rake tooth assembly of a lawn mowing machine according to a fifth embodiment of the present invention;

[0049] Figure 6 1 is a top view of the overall structure of an obstacle-clearing rake tooth assembly of a lawn mowing machine according to a sixth embodiment of the present invention;

[0050] Figure 7 1 is a top view of the overall structure of an obstacle-clearing rake tooth assembly of a lawn mowing machine according to a seventh embodiment of the present invention;

[0051] Figure 8 is a top view of the overall structure of an obstacle removal rake tooth assembly of a lawn mowing machine according to another embodiment of the present invention;

[0052] Figure 9 This is a schematic diagram of the disassembled structure of the rake teeth of the obstacle removal rake tooth assembly of the lawn mowing machine according to another embodiment of the present invention;

[0053] Figure 10 yes Figure 9 Schematic diagram of the local enlarged structure at A in the middle;

[0054] Figure 11 This is a schematic diagram of the disassembled structure of the movable portion and the fixed portion of the obstacle removal rake tooth assembly of a lawn mowing machine according to another embodiment of the present invention;

[0055] Figure 12 This is a schematic diagram of the installation state of the rake tooth group of the obstacle clearing rake tooth assembly of the lawn mowing machine according to another embodiment of the present invention;

[0056] Figure 13 Schematic diagram of the relative positional relationship between the rake tooth group and the mowing tool of the obstacle clearing rake tooth assembly of the lawn mowing machine according to another embodiment of the present invention;

[0057] Figure 14 This is a structural schematic diagram of the connection state of the movable part and the fixed part of the obstacle removal rake assembly of the lawn mowing machine according to another embodiment of the present invention;

[0058] Figure 15 It is a structural schematic diagram of the movable part and the fixed part of the obstacle clearing rake tooth assembly of the lawn mowing machine in another embodiment of the present invention in the disassembled state.

[0059] Reference numerals:

[0060] 10. Mounting seat; 20. Rake teeth; 21. Fixed portion; 211. Nesting portion; 22. Movable portion; 221. Connecting portion; 222. Lower arc portion; 223. Upper arc portion; 224. Upper arc mounting sleeve; 30. Pruning tool. DETAILED DESCRIPTION

[0061] The present invention will be further described below in conjunction with the accompanying drawings:

[0062] Example 1:

[0063] A lawn mowing machine obstacle removal rake tooth assembly, such as Figure 1 Shown, including:

[0064] A mounting base 10, the mounting base 10 is used to mount the rake teeth 20;

[0065] The rake tooth group is used for clearing obstacles and combing grass. The rake tooth group includes a plurality of rake teeth 20, which are arranged in parallel and side by side on the mounting seat 10. The end face shape of the rake tooth group on the side away from the mounting seat 10 is a circular arc surface, an inclined surface relative to the length direction of a single rake tooth 20, or a shape composed of at least two inclined surfaces with a pointed tip in the direction away from the mounting seat 10, or one or more combinations thereof.

[0066] In this embodiment, the end surface of the rake tooth group away from the mounting seat 10 is in the shape of a complete arc surface, and the shape of the rake teeth 20 is straight, and the end surface thereof is not processed.

[0067] The obstacle-clearing rake tooth assembly of the lawn mowing machine of the present invention is designed with respect to the shape of the front end face of the rake tooth group, so that when the mobile vehicle is propelled, after the rake tooth group contacts an obstacle, the obstacle will move along the front end face of the rake tooth group toward the outside of the rake tooth group under the thrust of the rake tooth group, and eventually the obstacle will separate from the rake tooth group from the two side edges of the rake tooth group, thereby preventing the obstacle from always hindering the propulsion of the mobile vehicle in front of the rake tooth group, and also preventing the rake teeth 20 from being worn for a long time.

[0068] Example 2:

[0069] like Figure 2 As shown, the difference between this embodiment and embodiment 1 is that the end of the rake teeth 20 away from the mounting seat 10 is provided with a notch to form the end surface shape of the rake tooth group away from the mounting seat 10.

[0070] The ends of the rake teeth 20 are provided with notches, so that the shape transition formed by the end faces of the rake tooth group is smoother, which is more conducive to the obstacles sliding along the end faces to the two sides of the rake tooth group, and the obstacle removal effect is better.

[0071] In this embodiment, the shape of the end face of the rake tooth group is still arc-shaped, but the end face of the rake tooth 20 is cut with an arc notch, the transition between the rake teeth 20 is smoother, and the arc surface has a stronger ability to withstand impact.

[0072] Example 3:

[0073] like Figure 3 As shown, the difference between this embodiment and embodiment 2 is that the shape of the end surface of the rake tooth group is a completely inclined slope.

[0074] In this embodiment, the end surface of the rake teeth 20 is also provided with a notch, and the notch of the end surface of the rake teeth 20 in this embodiment is also an inclined notch.

[0075] In this embodiment, when the rake tooth group is propelled by the mobile vehicle, all obstacles slide toward one side of the rake tooth group.

[0076] Example 4:

[0077] like Figure 4 As shown, the difference between this embodiment and embodiment 3 is that the shape of the end face of the rake tooth group is a shape composed of at least two inclined surfaces with a pointed end in a direction away from the mounting seat 10. In this embodiment, the shape of the end face of the rake tooth group is composed of two inclined surfaces, and the intersection point is in the middle of the end face of the rake tooth group.

[0078] In the process of the mobile vehicle propelling the rake tooth group in this embodiment, the obstacle can slide toward the left and right sides of the rake tooth group according to the position where the obstacle contacts the rake tooth group.

[0079] Example 5:

[0080] like Figure 5 As shown, the difference between this embodiment and embodiment 4 is that the shape of the end surface of the rake tooth group is composed of four inclined surfaces, and the intersection points are respectively in the middle of the end surface of the rake tooth group and on both sides of the middle. In this embodiment, the number of inclined surfaces is greater;

[0081] For the case where there are more inclined surfaces, it can be closer to the rotation trajectory of the trimming tool 30, such as Figure 5 As shown, Figure 5 The end face shape of the middle rake tooth group and the rotation trajectory of the pruning tool 30 are marked with dotted lines. The inclined surface formed at the front end of the rake tooth group is almost tangent to the rotation trajectory of the pruning tool 30. In actual application, in order to ensure safety, the rake teeth 20 are designed to be longer. However, when there are more inclined surfaces, the end faces of the rake tooth group can be closer to the rotation trajectory of the pruning tool 30. The length of the rake teeth 20 at the edges of both sides of the rake tooth group is shorter, the mounting seat 10 has better support for the rake teeth 20, and the rake teeth 20 are less likely to deform. At the same time, the angles of the inclined surfaces at the edges of both sides of the rake tooth group are larger, which makes it easier to cause obstacles to slide quickly out in front of the rake tooth group, and the obstacle removal effect is better.

[0082] Example 6:

[0083] like Figure 6 As shown, the difference between this embodiment and embodiment 5 is that the shape of the end surface of the rake tooth group is a combination of a circular arc surface located in the middle and inclined surfaces located on both sides of the circular arc surface. Figure 6 The end face shape of the middle rake tooth group and the rotation trajectory of the pruning tool 30 are also marked with dotted lines. The arc surface is located in the middle. When the middle part is facing an impact, the bearing capacity of the arc surface is greater than the bearing capacity at the tip of the rake tooth group. Therefore, the combined shape can not only ensure the ability to withstand impact, but also obtain a slope with a larger inclination angle at the edge of the rake tooth group, which can quickly clear obstacles. The mounting seat 10 has better support for the rake teeth 20, and the rake teeth 20 are also less likely to deform.

[0084] In the above embodiment, an arc surface, an inclined surface relative to the length direction of a single rake tooth 20, and a shape of a tip with a direction away from the mounting seat 10 composed of at least two inclined surfaces are respectively exemplified, and an example is also given for a combination of the three methods. However, it can be understood by those skilled in the art that the end face shape of the rake tooth group can be further combined on the basis of the above three single designs, and no further examples are given here.

[0085] Example 7:

[0086] like Figure 7 As shown, the difference between this embodiment and Example 4 is that the shape of the end face of the mounting seat 10 facing the rake tooth group is the same as the shape of the end face of the rake tooth group, and is also a shape with a pointed end composed of two inclined surfaces. This can further reduce the length of the rake teeth 20, and the mounting seat 10 provides better support for the rake teeth 20, and the rake teeth 20 are less likely to deform.

[0087] In another embodiment, Figure 8 、 Figure 9 and Figure 10 As shown, this embodiment can be implemented on the basis of any of the above embodiments. Here, it is taken as an example to implement it on the basis of embodiment 2.

[0088] The rake teeth 20 include:

[0089] The fixed portion 21 is connected to the mounting base 10 and is used to support the movable portion 22;

[0090] The movable portion 22 is detachably connected to an end of the fixed portion 21 away from the mounting seat 10 .

[0091] The rake teeth 20 are divided into a fixed part 21 and a movable part 22. The movable part 22 is detachable, so that the rake tooth group does not need to be replaced as a whole during long-term maintenance. Only the severely worn movable part 22 needs to be replaced, which reduces maintenance costs.

[0092] In another embodiment, Figure 10 As shown, a nesting portion 211 is provided at the end of the fixed portion 21 . The provision of the nesting portion 211 facilitates the installation of the movable portion 22 .

[0093] In another embodiment, Figure 11 As shown, the movable portion 22 includes:

[0094] The lower arc portion 222 is in a shape that is curved toward the ground and is used for clearing obstacles and combing low-lying grass;

[0095] The connecting portion 221 is provided at one end of the lower arc portion 222 , and is used to connect with the fixing portion 21 .

[0096] The lower arc portion 222 is bent toward the ground. For grass that is bent in the transverse direction relative to the forward direction of the rake tooth group, the downward-bent lower arc portion 222 can comb it vertically, which is convenient for the rake teeth 20 to trim. Therefore, the rake teeth 20 can comb the grass in a wider range of heights. In the prior art, in order to comb the bent grass vertically, it is necessary to set up power components. This embodiment can achieve similar technical effects through the structural design of the lower arc portion 222, and the trimming quality is better. At the same time, the bent lower arc portion 222 can play a buffering role when colliding with an obstacle, and the fixed portion 21 is less impacted.

[0097] In another embodiment, Figure 11 As shown, the movable portion 22 further includes:

[0098] The upper arc portion 223 is curved in a direction opposite to the curvature of the lower arc portion 222 , and is used to block obstacles lifted by the lower arc portion 222 .

[0099] The lower arc portion 222 is bent downward, and what may happen is that some smaller stones will be picked up by the rake tooth group while being pushed toward the outside of the rake tooth group. By providing the upper arc portion 223, a barrier is formed between the lower arc portion 222 and the pruning tool 30. The setting of the upper arc portion 223 can block the obstacles picked up by the bent lower arc portion 222, preventing the obstacles from being picked up toward the pruning tool 30, thereby providing good protection for the pruning tool 30.

[0100] In another embodiment, Figure 13 As shown, the top of the upper arc portion 223 is higher than the level of the trimming blade 30 of the lawn mowing machine.

[0101] The top of the upper arc portion 223 goes around to the top of the trimming tool 30, and all obstacles flying from the front are blocked by the upper arc portion 223, which can maximize the protection of the trimming tool 30 without affecting the combing effect of the rake teeth 20 on the grass.

[0102] In another embodiment, Figure 11 、 Figure 12 and Figure 13 As shown, the end of the upper arc portion 223 is fixedly connected to the connecting portion 221. In this embodiment, the upper arc portion 223, the lower arc portion 222 and the connecting portion 221 are an integrated structure. A cavity with the same shape as the nesting portion 211 is provided in the middle of the connecting portion 221, and a snap-fit structure is provided on the surface of the nesting portion 211 and the inner wall of the cavity in the middle of the connecting portion 221, respectively. The snap-fit structure is used to achieve the snap-fit between the connecting portion 221 and the nesting portion 211.

[0103] In another embodiment, Figure 14 and Figure 15As shown, an upper arc mounting sleeve 224 is provided at the bottom of the upper arc portion 223 , and a through cavity is provided inside the upper arc mounting sleeve 224 , and the shape of the cavity matches the shape of the connecting portion 221 .

[0104] When installing the upper arc portion 223, first insert the upper arc mounting sleeve 224 from one end of the lower arc portion 222, and make the upper arc mounting sleeve 224 and the connecting portion 221 face each other. Mounting holes are provided on both the upper arc mounting sleeve 224 and the connecting portion 221. The central cavity of the connecting portion 221 matches the shape of the nesting portion 211. The nesting portion 211 also has a mounting hole of the same size. After adjusting the position of the upper mounting sleeve and the connecting portion 221, insert the nesting portion 211 into the cavity in the middle of the connecting portion 221, and screw and nut are screwed in from both sides of the upper arc mounting sleeve 224 to fix them as one.

[0105] By installing the upper arc portion 223 through the upper arc mounting sleeve 224, the instability problem caused by connecting two curved components to the same connecting portion 221 can be avoided. At the same time, when the upper arc mounting sleeve 224, the connecting portion 221 and the nesting portion 211 are fixed together, the upper arc mounting sleeve 224 can produce a squeezing effect on the connecting portion 221, further enhancing the connection strength between the three.

[0106] In another embodiment, Figure 12 and Figure 13 As shown, the fixing portion 21 is tilted, and the horizontal height of the end of the fixing portion 21 connected to the mounting seat 10 is higher than the horizontal height of the end of the fixing portion 21 away from the mounting seat 10 .

[0107] The fixing portion 21 is tilted so that an obstacle entering between the fixing portion 21 and the pruning tool 30 can slide downward under the action of its own weight under special circumstances, thereby avoiding continuous damage to the pruning tool 30, and the tilted fixing portion 21 has a better supporting effect on the curved lower arc portion 222.

[0108] In actual application, although the pruning tool 30 passes over the fixing part 21 at a certain frequency interval, and there is a probability that small stones on the fixing part 21 will be directly swept out of the fixing part 21, there will always be some small stones on the fixing part 21 and constantly collide with the pruning tool 30. Therefore, when the fixing part 21 is set at an angle, combined with the horizontal sweeping of the pruning tool 30, even if small stones enter between the fixing part 21 and the pruning tool 30, they can be quickly discharged.

[0109] In another embodiment, Figure 10As shown, a nesting portion 211 is provided at one end of the fixed portion 21 away from the mounting seat 10 and is connected to the movable portion 22 through the nesting portion 211. A notch is provided on the nesting portion 211 that matches the notch shape on the movable portion 22 corresponding to the fixed portion 21. The lengths of the movable portions 22 of several rake teeth 20 are equal.

[0110] By providing the nesting portion 211, the fixed portion 21 and the movable portion 22 are more closely connected. At the same time, the notch provided on the nesting portion 211 allows the user to select or process the notch of the movable portion 22 according to the shape of the notch of the nesting portion 211 during maintenance. The lengths of the movable portions 22 of the rake teeth 20 are all equal, which is convenient for storage, transportation, and further convenient for maintenance.

[0111] In another embodiment, the movable portion 22 is entirely made of plastic.

[0112] The movable part 22 made of plastic has lower cost and is easy to trim to conform to the standard shape during maintenance. There is no need to stock movable parts 22 of all shapes. When replacing, the new movable part 22 can be trimmed according to the shape of the replaced movable part 22.

[0113] In another embodiment, the material of the lower arc portion 222 and the connecting portion 221 is plastic, and the material of the upper arc portion 223 and the upper arc mounting sleeve 224 is metal. The lower arc portion 222 wears out quickly, and the cost of using plastic is low. The upper arc portion 223 wears out slowly, and the service life of using metal is longer. In addition, the metal upper arc portion 223 has a stronger ability to withstand impact, which can prevent the upper arc portion 223 from bending when hit by a stone, moving toward the pruning tool 30, and hindering the rotational movement of the pruning tool 30. Therefore, the use of metal as the material of the upper arc portion 223 can better protect the pruning tool 30. Furthermore, the connecting portion 221 is made of plastic. When fastened with screws, the connecting portion 221 can further deform, so that the connecting portion 221 and the nesting portion 211, and the connecting portion 221 and the upper arc mounting sleeve 224 are closer, and the connection strength is higher.

[0114] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A rake tooth assembly for lawn mowing machinery, characterized in that: include: A mounting seat, the mounting seat being used for mounting the rake teeth; A rake tooth group, the rake tooth group is used for clearing obstacles and combing grass, the rake tooth group includes a plurality of rake teeth, the plurality of rake teeth are arranged in parallel and side by side on a mounting base, and the end surface of the rake tooth group on the side away from the mounting base is shaped as one or more combinations of a circular arc surface, an inclined surface relative to the length direction of a single rake tooth, and a shape consisting of at least two inclined surfaces with a pointed end facing away from the mounting base; The end of the rake teeth away from the mounting seat is provided with a notch to form the end face shape of the rake tooth group away from the mounting seat; The rake teeth include: a fixing portion connected to the mounting seat and used to support the movable portion; a movable portion, the movable portion being detachably connected to an end of the fixed portion away from the mounting seat; The activities include: A lower arc portion, wherein the lower arc portion is in a shape curved toward the ground and is used for clearing obstacles and combing low-lying grass; a connecting portion, the connecting portion being arranged at one end of the lower arc portion and being used to connect to the fixing portion; The activity section also includes: The upper arc portion is in a curved shape facing in a direction opposite to the curvature of the lower arc portion, and is used to block obstacles lifted by the lower arc portion.

2. The obstacle clearing rake tooth assembly of the lawn mowing machine according to claim 1, characterized in that: The top of the upper arc portion has a higher level than a trimming tool of the lawn mowing machine.

3. The obstacle clearing rake tooth assembly of the lawn mowing machine according to claim 1, characterized in that: An upper arc mounting sleeve is provided at the bottom of the upper arc portion, a through cavity is provided inside the upper arc mounting sleeve, and the shape of the cavity matches the shape of the connecting portion.

4. The obstacle clearing rake tooth assembly of the lawn mowing machine according to claim 1, characterized in that: The fixing portion is arranged obliquely, and a horizontal height of an end of the fixing portion connected to the mounting seat is higher than a horizontal height of an end of the fixing portion away from the mounting seat.

5. The obstacle clearing rake tooth assembly of the lawn mowing machine according to claim 1, characterized in that: The fixed portion is provided with a nesting portion at one end away from the mounting seat and is connected to the movable portion through the nesting portion. The nesting portion is provided with a notch that matches the notch shape on the movable portion corresponding to the fixed portion. The movable portions of several rake teeth have the same length.

6. The obstacle clearing rake tooth assembly of the lawn mowing machine according to claim 5, characterized in that: The movable part is made of plastic.

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