Cutter head lifting assembly and mower

Abstract

The utility model discloses a cutterhead lifting assembly and a mower. The cutterhead lifting assembly comprises a lifting driving piece, a guiding piece, a flexible belt, a cutterhead, a shell and a cutterhead driving piece. The fixed end of the lifting driving piece is connected to the machine body; the rotating center of the guide piece is fixedly connected with the output end of the lifting driving piece; the fixed end of the cutterhead driving part is arranged on the shell, and the output end of the cutterhead driving part penetrates through the shell and is connected with the cutterhead; one end of the flexible belt is fixedly connected with the shell, and the other end of the flexible belt is connected with the guide piece; when meeting with a bumpy earth surface, the earth surface jacks up the cutterhead, the shell and the cutterhead driving piece upwards, and at the moment, the flexible belt is bent and deformed to adapt to the rapid change of the shape of a lawn; a lifting transmission structure of the cutter head adopts a guide piece and a flexible belt, the transmission structure is small in size, and the universality is higher than that of a lead screw transmission structure; the mower provided by the utility model can be suitable for the bumpy earth surface, and is smaller in occupied space and higher in integration level.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mower accessories, in particular to a cutter disc lifting component and a lawn mower. Background Art

[0002] A lawn mowing robot is a machine used to mow the lawn. It can be used to replace manual mowing, reduce the cost of manual mowing, and mow the lawn on a flat lawn with uniform height and strong ornamental value.

[0003] When the lawn mower robot encounters a pothole in the lawn, the relative height between the blade disc and the body cannot be adjusted, resulting in mowed lawn being mottled. In order to solve the above technical problems, the existing lawn mower robot commonly uses a screw transmission structure to drive the blade disc up and down, and adjusts the relative distance between the blade disc and the lawn in advance to keep the height of the mowed lawn consistent.

[0004] Household lawn mower robots have the advantage of being small in size. Therefore, when designing a household lawn mower robot, its size limitation should be taken into account, and a miniaturized lifting transmission structure should be adopted as much as possible. However, the screw transmission structure is complex, has a large adjustment stroke, and occupies a large space, and is not suitable for household lawn mower robots. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a cutter disc lifting assembly and a lawn mower, which have a high degree of ornamental value for trimmed lawns, are suitable for pothole lawns, and have a lifting transmission structure that occupies a small space.

[0006] The first technical solution adopted by the utility model to solve its technical problem is:

[0007] A cutter disc lifting assembly comprises a lifting drive member, a guide member, a flexible belt, a cutter disc, a housing and a cutter disc driving member;

[0008] The fixed end of the lifting drive member is connected to the machine body;

[0009] The rotation center of the guide member is fixedly connected to the output end of the lifting drive member;

[0010] The fixed end of the cutter disc driving member is arranged on the housing, and the output end of the cutter disc driving member passes through the housing and is connected to the cutter disc;

[0011] One end of the flexible belt is fixedly connected to the shell, and the other end of the flexible belt is connected to the guide member.

[0012] The cutter disc lifting assembly as described above, wherein the housing comprises a first shell connected to the flexible belt and a second shell surrounding the circumference of the cutter disc;

[0013] The output end of the lifting drive member passes through the first shell and the second shell, and is connected to the cutter head;

[0014] The second shell has an open installation cavity, and the cutter disc is installed in the installation cavity.

[0015] The cutter disc lifting assembly as described above, wherein the guide member comprises a guide wheel;

[0016] The guide wheel is provided with a guide groove for the flexible belt to be embedded along its circumference.

[0017] The cutter disc lifting assembly as described above, wherein the lifting drive member is a dual-axis motor;

[0018] The two output ends of the dual-axis motor are arranged on the same axis;

[0019] The guide members and the flexible belts are both in two groups;

[0020] The guide members are connected to the output ends of the dual-axis motors in a one-to-one correspondence;

[0021] The extending directions of the two flexible belts connected to the shell are both located on the same side of the guide member.

[0022] As described above, the cutter disc lifting assembly has a plurality of connection points between the single flexible belt and the outer shell, and each connection point is arranged along the length direction of the flexible belt.

[0023] The cutter disc lifting assembly as described above, wherein the housing further comprises a connecting block;

[0024] The connecting block is fixedly arranged on the inner side wall of the shell;

[0025] A side wall of the connection block is located below the guide member, and a contact point between the flexible belt and the guide member is located on the same vertical plane as the side wall of the connection block.

[0026] The cutter head lifting assembly as described above further comprises a body shell connected to the body;

[0027] The inner wall of the body shell is arranged adjacent to the outer wall of the first shell, and the body shell and / or the first shell are provided with a guide member for guiding the body shell and the first shell to slide relative to each other.

[0028] In the cutter disc lifting assembly as described above, a buffer is provided on the side wall of the machine body shell and the second shell body opposite to each other, and / or on the side wall of the second shell body and the machine body shell opposite to each other.

[0029] In the cutter disc lifting assembly as described above, the buffer member is fixedly arranged on the machine body shell, and one end of the buffer member is movably pressed against the outer wall of the first shell body.

[0030] As described above, the cutter disc lifting assembly, the housing further comprises a bottom shield disposed at the bottom of the cutter disc.

[0031] The second technical solution adopted by the utility model to solve its technical problem is:

[0032] A lawn mower comprises the above-mentioned cutter disc lifting assembly.

[0033] The beneficial effects of the utility model are:

[0034] The present application provides a cutter disc lifting group, in which the flexible belt is in a stretched state under the gravity of the cutter disc, the housing and the cutter disc driving member in the initial state; when encountering a pothole surface, the surface pushes up the cutter disc, the housing and the cutter disc driving member, and the flexible belt is bent and deformed at this time, so that the cutter disc has a floating function and can adapt to the rapid change of the lawn shape; and the lifting transmission structure of the cutter disc adopts a guide member and a flexible belt, and the lifting driving member drives the guide member to rotate, thereby retracting and releasing the flexible belt, driving the cutter disc, the housing and the cutter disc driving member to synchronously lift and lower relative to the machine body, and the transmission structure is small in size and more versatile than the screw transmission structure;

[0035] The present application also provides a lawn mower, which has the above-mentioned blade lifting group structure and is therefore suitable for mowing potholes on the ground, and occupies less space and has a higher degree of integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0037] Figure 1 It is one of the three-dimensional structural diagrams of the cutter head lifting assembly;

[0038] Figure 2 It is a schematic diagram of the three-dimensional structure of the cutter disc lifting assembly omitting the body shell and the first shell;

[0039] Figure 3 It is a top view of the cutter head lifting assembly;

[0040] Figure 4 is along Figure 3 Sectional view of the AA plane;

[0041] Figure 5 yes Figure 4 A magnified view of the structure of the middle A part;

[0042] Figure 6 This is the second schematic diagram of the three-dimensional structure of the cutter head lifting assembly;

[0043] Figure 7 is a side view of the cutterhead lifting assembly;

[0044] Figure 8 is along Figure 7 Sectional view of the middle BB plane;

[0045] The reference numerals in this embodiment are as follows:

[0046] 1-lifting drive member; 2-guide member; 211-guide groove; 3-flexible belt; 4-cutter disc; 5-housing; 51-first shell; 52-second shell; 521-oblique teeth; 511-installation cavity; 53-connecting block; 54-bottom shield; 6-cutter disc drive member; 7-body shell; 71-buffer member; 731-roller. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0048] Reference Figures 1 to 8 ,A cutter disc lifting assembly, comprising a lifting drive member 1, a guide member 2, a flexible belt 3, a cutter disc 4, a housing 5 and a cutter disc driving member 6;

[0049] The fixed end of the lifting drive member 1 is connected to the body; the body may refer to the body of the lawn mowing robot excluding the blade part;

[0050] The rotation center of the guide member 2 is fixedly connected to the output end of the lifting drive member 1;

[0051] The fixed end of the cutter disc driving member 6 is arranged on the housing 5, and the output end of the cutter disc driving member 6 passes through the housing 5 and is connected to the cutter disc 4;

[0052] One end of the flexible belt 3 is fixedly connected to the housing 5 , and the other end of the flexible belt 3 is connected to the guide member 2 .

[0053] In the initial state, the horizontal positions of the cutter disc 4, the housing 5 and the cutter disc drive 6 are higher than the ground surface, and under the gravity of the cutter disc 4, the housing 5 and the cutter disc drive 6, the flexible belt 3 is in a stretched state;

[0054] How does the cutter head lifting component achieve the floating function? Take the following scenario as an example:

[0055] When the machine body is a lawn mower robot, wheels are provided at the four corners of the lawn mower robot, and the blade lifting assembly in this embodiment is provided between the four wheels of the lawn mower robot;

[0056] When encountering a raised grass slope during the mowing process, and the width of the grass slope is smaller than the width between the two adjacent wheels of the mowing robot, as the mowing robot moves forward, the horizontal position of the wheels of the mowing robot remains unchanged, and the grass slope pushes up the cutter disc 4, the housing 5 and the cutter disc drive 6. At this time, the lifting drive 1 does not work. Since the relative distance between the housing 5 and the lifting drive 1 becomes shorter, the flexible belt 3 bends and deforms. This process is called "floating", so it can adapt to potholes and undulating lawns. If the screw transmission structure in the prior art is adopted, the screw slider on the screw is connected to the cutter disc 4. When encountering potholes and undulating lawns, the screw rotation motor must be adjusted in advance to drive the screw slider to rotate, so that the height of the cutter disc 4 relative to the grass slope can be adjusted. If the screw rotation motor is not adjusted in advance, the cutter disc 4 will collide with the grass slope, affecting the mowing effect.

[0057] In addition, the lifting transmission structure of the blade disc 4 in this embodiment adopts a guide member 2 and a flexible belt 3. The lifting drive member 1 drives the guide member 2 to rotate, and while retracting and extending the flexible belt 3, it drives the blade disc 4, the shell 5 and the blade disc drive member 6 to rise and fall synchronously relative to the body. The length of the retractable flexible belt 3 can be adjusted according to the required height of the lawn. The transmission structure in this embodiment is small in size and suitable for household lawn mowing robots. It is more versatile than the screw transmission structure.

[0058] Preferably, the tensile strength of the flexible belt 3 is greater than or equal to the sum of the gravity of the cutter disc 4, the outer casing 5 and the cutter disc drive 6, and the flexible belt 3 can be made of a material with high tensile strength such as a steel belt; the lifting drive 1 is a lifting motor in the prior art, and the cutter disc drive 6 is a motor with a rotatable output end in the prior art.

[0059] Furthermore, the housing 5 includes a first shell 51 connected to the flexible belt 3 and a second shell 52 surrounding the blade disc 4 circumferentially; the first shell 51 and the second shell 52 may be integrally formed;

[0060] The output end of the lifting drive member 1 passes through the first housing 51 and the second housing 52 and is connected to the cutter head 4;

[0061] The second housing 52 has an open installation cavity 511 , and the cutter disc 4 is installed in the installation cavity 511 .

[0062] When in use, a plurality of mowing blades are provided along the circumferential edge of the blade disc 4, and the design of the second housing 52 ensures that it completely covers these blades to prevent the user from accidentally touching the blades and causing injury;

[0063] Reference Figure 4 The opening direction of the installation cavity 511 faces away from the first shell 51, and the height of the second shell 52 is greater than the height of the blade disc 4. In this way, when encountering a pothole, the second shell 52 directly contacts the lawn ground, and the second shell 52 is lifted up, thereby driving the blade disc 4, the blade disc driving member 6 and the first shell 51 to move synchronously toward the machine body.

[0064] Reference Figure 6 More specifically, the second shell 52 is provided with a plurality of oblique teeth 521, and the oblique teeth 521 are arranged at an acute angle with the lawn ground; the oblique teeth 521 are arranged at the front end of the forward direction of the lawn mowing robot; when encountering a grass slope, the lawn mowing robot keeps moving forward, and the oblique teeth 521 can guide the second shell 52 to move smoothly to prevent the second shell 52 from flipping over.

[0065] Further, the guide member 2 includes a guide wheel;

[0066] The guide wheel is provided with a guide groove 211 along its circumference for the flexible belt 3 to be embedded.

[0067] The guide groove 211 has the function of determining the moving direction of the flexible belt 3, so as to prevent the flexible belt 3 from deviating from the predetermined direction during the winding and unwinding process, thereby affecting the lifting and lowering of the cutter disc.

[0068] Specifically, the lifting drive member 1 is a dual-axis motor;

[0069] The two output ends of the dual-axis motor are arranged on the same axis;

[0070] The guide members 2 are connected to the output ends of the dual-axis motors in a one-to-one correspondence; the two sets of guide members 2 and the flexible belts 3 can be synchronously driven to achieve coordinated retraction and extension actions;

[0071] The connection points between the two flexible belts 3 and the housing 5 are both located on the same side of the guide member 2. There are two connection points between the lifting drive member 1 and the housing 5. Compared with only one connection point, the two connection points drive the housing 5 to rise and fall, and the lifting process will be smoother;

[0072] Preferably, the lifting drive member 1 is arranged directly above the cutter disc drive member 6, and at this time, the connection points between the flexible belt 3 and the housing 5 are located on both sides of the cutter disc drive member 6;

[0073] More preferably, the output end of the cutter disc driving component 6 is connected to the center of gravity of the cutter disc 4 .

[0074] More specifically, there are multiple connection points between a single flexible belt 3 and the housing 5, and each connection point is arranged along the length direction of the flexible belt 3. Providing multiple connection points on a single flexible belt 3 can more evenly disperse the load on the flexible belt 3, reduce stress concentration at a single connection point, extend the service life of the flexible belt, and improve the stability of the housing 5 during lifting.

[0075] Furthermore, the housing 5 also includes a connecting block 53;

[0076] The connecting block 53 is fixedly arranged on the inner wall of the housing 5;

[0077] Reference Figure 2 , a side wall of the connecting block 53 is located below the guide member 2 , and the contact point between the flexible belt 3 and the guide member 2 is located on the same vertical plane as the side wall of the connecting block 53 .

[0078] If the connection point between the flexible belt 3 and the housing 5 is located on the bottom wall of the housing, the flexible belt 3 may be bent by 90 degrees due to the gravity of the cutter head 4, the housing 5 and the cutter head drive 6, resulting in stress concentration at the bend and increasing the risk of breakage;

[0079] In the present solution, the end of the flexible belt 3 connected to the housing 5 and the connecting block 53 is flat and has no bends, so the service life of the flexible belt 3 is longer.

[0080] Furthermore, it also includes a body shell 7 connected to the body;

[0081] The inner wall of the body shell 7 is disposed adjacent to the outer wall of the first shell 51; the body shell 7 encloses the first shell 51, and the first shell 51 can be raised and lowered relative to the body shell 7;

[0082] The body shell 7 and / or the first shell 51 are provided with a guide member for guiding the relative sliding of the body shell 7 and the first shell 51. The guide member can reduce the friction vibration caused by the relative sliding of the body shell 7 and the first shell 51, and improve the stability during lifting.

[0083] The design of the guide member can refer to Figure 8 , a plurality of rollers 731 are provided on the body shell 7, and the axis of each roller 731 is perpendicular to the moving direction of the cutter disc 4;

[0084] The guide member may also have a slide rail structure or a roller structure;

[0085] Reference Figure 2 , Figure 4Specifically, a buffer 71 is provided on the side wall of the machine body shell 7 opposite to the second shell 52, and / or on the side wall of the second shell 52 opposite to the machine body shell 7. When the machine body shell 7 encloses the first shell 51 and the second shell 52 rises relative to the machine body shell 7, if the lifting drive 1 outputs a large power or encounters a large grass slope, the second shell 52 will collide with the machine body shell 7, causing the blade lifting assembly to vibrate, affecting the operation of the lawn mower; the buffer 71 can buffer the impact force between the second shell 52 and the machine body shell 7, reducing the impact of lifting on the operation of the lawn mower.

[0086] More specifically, the buffer member 71 is fixed on the body shell 7, and one end of the buffer member 71 is movably pressed against the outer wall of the first shell 51. At this time, the buffer member 71 can be regarded as a damping structure, which can absorb the vibration between the body shell 7, the first shell 51 and the second shell 52;

[0087] More specifically, the buffer member 71 is a rubber strip. When the cutter disc is raised or lowered, the rubber strip will be compressed and deformed to a certain extent, thereby achieving a buffering effect.

[0088] Furthermore, the housing 5 also includes a bottom shield 54 disposed at the bottom of the blade disc 4 to prevent the lawn ground from directly colliding with the blade disc 4 and causing damage to the blade disc 4, thereby protecting the blade disc 4.

[0089] A lawn mower, characterized in that it comprises the above-mentioned cutter disc lifting assembly.

[0090] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A cutter head lifting assembly, characterized in that: It comprises a lifting drive member (1), a guide member (2), a flexible belt (3), a cutter disc (4), a housing (5) and a cutter disc drive member (6); The fixed end of the lifting drive member (1) is connected to the machine body; The rotation center of the guide member (2) is fixedly connected to the output end of the lifting drive member (1); The fixed end of the cutter disc driving component (6) is arranged on the outer shell (5), and the output end of the cutter disc driving component (6) passes through the outer shell (5) and is connected to the cutter disc (4); One end of the flexible belt (3) is fixedly connected to the housing (5), and the other end of the flexible belt (3) is connected to the guide member (2).

2. The cutter head lifting assembly according to claim 1, characterized in that: The housing (5) comprises a first shell (51) connected to the flexible belt (3) and a second shell (52) surrounding the circumference of the cutter disc (4); The output end of the lifting drive member (1) passes through the first shell (51) and the second shell (52), and is connected to the cutter disc (4); The second shell (52) has an open installation cavity (511), and the cutter disc (4) is installed in the installation cavity (511).

3. The cutter head lifting assembly according to claim 1, characterized in that: The guide member (2) comprises a guide wheel; The guide wheel is provided with a guide groove (211) along its circumference for the flexible belt (3) to be embedded.

4. The cutter head lifting assembly according to claim 3, characterized in that: The lifting drive member (1) is a double-axis motor; The two output ends of the dual-axis motor are arranged on the same axis; The guide member (2) and the flexible belt (3) are both in two groups; The guide member (2) is connected to the output end of the dual-axis motor in a one-to-one correspondence; The extending directions of the two flexible belts (3) connected to the housing (5) are both located on the same side of the guide member (2).

5. The cutter head lifting assembly according to claim 4, characterized in that: There are multiple connection points between the single flexible belt (3) and the outer shell (5), and each connection point is arranged along the length direction of the flexible belt (3).

6. The cutter head lifting assembly according to claim 1, characterized in that: The housing (5) further comprises a connecting block (53); The connecting block (53) is fixedly arranged on the inner side wall of the outer shell (5); A side wall of the connecting block (53) is located below the guide member (2), and the contact point between the flexible belt and the guide member (2) is located on the same vertical plane as the side wall of the connecting block (53).

7. The cutter head lifting assembly according to claim 2, characterized in that: It also includes a body shell (7) connected to the body; The inner wall of the machine body shell (7) is arranged adjacent to the outer wall of the first shell (51), and the machine body shell (7) and / or the first shell (51) are provided with a guide member for guiding the machine body shell (7) and the first shell (51) to slide relative to each other.

8. The cutter head lifting assembly according to claim 7, characterized in that: It also comprises a buffer component (71), wherein the buffer component (71) is arranged on a side wall of the machine body shell (7) opposite to the second shell body (52), and / or on a side wall of the second shell body (52) opposite to the machine body shell (7).

9. The cutter head lifting assembly according to claim 8, characterized in that: The buffer component (71) is fixedly mounted on the machine body shell (7), and one end of the buffer component (71) is movably pressed against the outer wall of the first shell body (51).

10. The cutter head lifting assembly according to claim 1, characterized in that: The housing (5) further comprises a bottom shield (54) arranged at the bottom of the blade disc (4).

11. A lawn mower, characterized in that: It comprises a cutter disc lifting assembly as described in any one of claims 1 to 10 above.

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