Falling sensing structure, wheel and mower

Abstract

The utility model discloses a drop induction structure, a wheel and a mower, which comprises a mounting seat, a central shell and an eccentric shaft with an eccentric shaft A and an eccentric shaft B. The shaft A of the eccentric shaft penetrates through the mounting seat and the central shell, and the shaft B of the eccentric shaft moves on one side of the central shell opposite to the mounting seat and is coaxial with the rotation center of a driven wheel. When the mounting seat bears the weight of the transportation device, the transportation device presses the shaft A downwards to drive the shaft B to swing upwards, so that the shaft B is kept in the tendency of abutting against the fixed abutting block; when the driven wheel leaves the ground, the gravity borne by the mounting seat is reduced, so that the shaft B swings downwards under the action of earth gravity to drive the shaft A to rotate, the shaft A and the shaft B move at the moment, and the sensing structure is arranged to sense the movement of the eccentric shaft, so that the situation that the wheel leaves the ground can be sensed.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mower accessories, and particularly relates to a fall induction structure, a wheel and a lawn mower. Background Art

[0002] During the operation of a lawn mower, natural or man-made obstacles such as ditches, stones, slopes, etc. are often encountered. These obstacles not only increase the difficulty of mowing work, but also may cause the wheels of the lawn mower to leave the ground, sink or be damaged, resulting in problems such as mowing interruption and damage to the equipment inside the lawn mower. If the equipment failure is not detected in time, it will affect the operation efficiency of the lawn mower. Summary of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a fall induction structure, a wheel and a lawn mower that can timely sense the fall of the lawn mower.

[0004] The first technical solution adopted by the utility model to solve its technical problems is:

[0005] A fall induction structure, comprising: a mounting seat, which is arranged on one side of the driven wheel of the transport device and can be used to bear the weight of the transport device body;

[0006] A central shell, which is fixedly connected to the mounting seat and rotatably connected to the driven wheel;

[0007] An eccentric shaft, which has an eccentric A-axis and B-axis. The A-axis passes through the mounting seat and the central shell, and the B-axis is coaxial with the rotation center on the driven wheel; the B-axis rotates around the A-axis and moves on the side of the central shell facing away from the mounting seat;

[0008] A fixed abutting block is arranged on the central shell within the swing radius of the B-axis;

[0009] An induction structure for sensing the movement of the eccentric shaft is arranged on the mounting seat and / or the central shell;

[0010] When the mounting seat bears the weight of the transport device, the B-axis remains in contact with the fixed abutting block; when the driven wheel leaves the ground, the B-axis disengages from the fixed abutting block.

[0011] For the fall induction structure as described above, a deviation abutting block is further arranged on the central shell within the swing radius of the B-axis. The deviation abutting block is arranged below the fixed abutting block, and the fixed abutting block and the deviation abutting block are arranged on the same side of the central shell;

[0012] When the driven wheel leaves the ground, the B-axis abuts against the deviation abutting block.

[0013] For the drop induction structure described above, the horizontal position of the fixed abutting block is higher than / equal to the horizontal position of the A-axis.

[0014] For the drop induction structure described above, the induction structure includes a magnetic field induction device fixedly arranged inside the mounting seat housing and a magnetic member arranged on the side wall of the A-axis.

[0015] For the drop induction structure described above, the magnetic field induction device is a Hall effect sensor.

[0016] For the drop induction structure described above, a groove is provided on the A-axis along the circumferential direction of the A-axis; a limiting member that can be embedded in the groove along the circumferential direction of the A-axis is provided on the mounting seat, and the A-axis can rotate relative to the limiting member.

[0017] For the drop induction structure described above, the mounting seat includes an upper box and a lower cover; the A-axis is arranged inside the upper box, and the lower cover is detachably connected to the upper box.

[0018] The second technical solution adopted by the present invention to solve its technical problems is:

[0019] A wheel includes the drop induction structure described above and a rim; the B-axis passes through the rotation center of the rim and is rotationally connected to the rim, and the central housing is rotationally connected to the rim.

[0020] For the wheel described above, it further includes a closing cover, the closing cover is arranged opposite to the central housing, and the closing cover is arranged on the side of the rim facing away from the drop induction structure.

[0021] The third technical solution adopted by the present invention to solve its technical problems is:

[0022] A lawn mower includes the wheel described above.

[0023] The beneficial effects of the present invention are:

[0024] This structure is a drop induction structure applied to a driven wheel. By setting an eccentric shaft, the A-axis of the eccentric shaft passes through the mounting seat and the central housing, and the B-axis of the eccentric shaft moves on the side of the central housing facing away from the mounting seat and is coaxial with the rotation center of the driven wheel; when the mounting seat bears the weight of the transportation device, the transportation device presses down the A-axis, driving the B-axis to swing upward, so as to keep the B-axis in a tendency to abut against the fixed abutting block; when the driven wheel leaves the ground, the gravity borne by the mounting seat decreases, so the B-axis swings downward under the action of gravity and drives the A-axis to rotate, at this time both the A-axis and the B-axis move, and an induction structure is set to sense the movement of the eccentric shaft, so as to sense that the wheel leaves the ground;

[0025] A wheel and a lawn mower are also provided. Since both of them have the above-mentioned drop sensing structure, they can also sense when the wheel leaves the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0027] Figure 1 is a three-dimensional structural schematic diagram of the wheel in the present utility model;

[0028] Figure 2 is an exploded view of the wheel in the present utility model;

[0029] Figure 3 is a three-dimensional structural schematic diagram of the wheel in the present utility model (the driven wheel is omitted);

[0030] Figure 4 is one of the schematic diagrams of the positional relationship between the fixed abutting block, the offset abutting block and the B axis in the present utility model;

[0031] Figure 5 is the second schematic diagram of the positional relationship between the fixed abutting block, the offset abutting block and the B axis in the present utility model;

[0032] Figure 6 is along Figure 2 the sectional view taken along the A-A line in

[0033] Figure 7 is an exploded view of the drop sensing structure in the present utility model;

[0034] The reference signs in these drawings are as follows:

[0035] 1 - mounting seat; 11 - upper box; 111 - limiting member; 12 - lower cover; 2 - central housing; 21 - fixed abutting block; 22 - offset abutting block; 3 - eccentric shaft; 31 - A axis; 311 - groove; 32 - B axis; 4 - sensing structure; 41 - magnetic field sensing device; 42 - magnetic member; 5 - driven wheel; 51 - rim; 52 - closing cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The concept, specific structure, and technical effects of the present utility model will be clearly and completely described below in conjunction with embodiments and the accompanying drawings to fully understand the purpose, features, and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts all fall within the scope of protection of the present utility model. In addition, all connection / connection relationships involved in the patent do not simply refer to direct connection of components, but refer to more optimal connection structures that can be formed by adding or reducing connection accessories according to specific implementation situations. Each technical feature in the creation of the present utility model can be interactively combined without conflicting with each other.

[0037] In this embodiment, the transportation device is a transportation structure with a driving wheel and a driven wheel; taking a lawn mower as an example, it includes a machine body, a driven wheel arranged in front of the machine body, a driving wheel arranged behind the machine body, and a driving device for driving the driving wheel to rotate; the driving device outputs power to drive the driving wheel to rotate, and the driving wheel pushes the driven wheel to rotate, so as to drive the machine body to move synchronously; in the existing structure, the rotation center of the driven wheel is generally used to connect a rotating shaft, and the rotating shaft is connected to the machine body to play a role in fixing the relative position of the driven wheel and the machine body;

[0038] Refer to Figures 1 to 7 , a drop sensing structure, including: a mounting seat 1, a central housing 2, and an eccentric shaft 3;

[0039] The mounting seat 1 is arranged on one side close to the driven wheel 5 and can be used to bear the weight of the transportation device body; the mounting seat 1 and the body can be connected through existing connection structures such as threads;

[0040] The central housing 2 is fixedly connected to the mounting seat 1 and rotatably connected to the driven wheel 5; under the push of the driving wheel, the driven wheel rotates, while the relative positions of the central housing 2 and the mounting seat 1 and the body remain unchanged;

[0041] The eccentric shaft 3 has an eccentric A-axis 31 and B-axis 32. The A-axis 31 passes through the mounting seat 1 and the central housing 2, and the A-axis 31 is rotatably connected to the mounting seat 1 and the central housing 2;

[0042] The B-axis 32 is coaxial with the rotation center on the driven wheel 5; that is, when the driven wheel 5 rotates, it rotates around the B-axis 32;

[0043] The B-axis 32 rotates around the A-axis 31 and moves on the side of the central housing 2 facing away from the mounting seat 1;

[0044] A fixed stop 21 is provided on the central housing 2 within the swing radius of the B-axis 32;

[0045] An induction structure 4 for sensing the movement of the eccentric shaft 3 is provided on the mounting base 1 and / or the central housing 2;

[0046] Referring to Figure 4 , when the mounting base 1 bears the weight of the transport device, the transport device presses down on the A-axis 31, driving the B-axis 32 to swing upward, so as to maintain the tendency of the B-axis 32 to move upward and abut against the lower part of the fixed abutting block 21; when the passive wheel 5 leaves the ground, the gravity borne by the mounting base 1 decreases. Therefore, the B-axis 32 swings downward under the action of gravity, driving the A-axis 31 to rotate self, referring to Figure 5 , at this time, both the A-axis 31 and the B-axis 32 move. The induction structure 4 is provided to sense the movement of the eccentric shaft 3, so as to sense when the wheel leaves the ground.

[0047] Specifically, the induction structure 4 can be used to sense the self-rotation of the A-axis or the swing of the B-axis;

[0048] In the above solution, it is possible that the B-axis 32 can rotate 360° around the A-axis 31 as the rotation center. For example, when the B-axis 32 rotates excessively and swings above the fixed abutting block 21, when the transport device presses down on the A-axis 31 and drives the B-axis 32 to swing upward, the B-axis 32 rotates above the fixed abutting block 21 and cannot abut against the lower part of the fixed abutting block 21. To avoid the occurrence of the above situation, referring to Figure 4 , Figure 5 , further, a deviation abutting block 22 is further provided on the central housing 2 and within the swing radius range of the B-axis 32. The deviation abutting block 22 is provided below the fixed abutting block 21, and the fixed abutting block 21 and the deviation abutting block 22 are provided on the same side of the central housing 2;

[0049] When the passive wheel 5 leaves the ground, the B-axis abuts against the deviation abutting block 22. The deviation abutting block 22 can control the swing amplitude of the B-axis 32, and can ensure that when the machine body presses down on the mounting base 1, the B-axis 32 always abuts against the lower part of the fixed abutting block 21;

[0050] Specifically, with the axis center of the A-axis 31 as the apex angle, the angle between the connection line between the axis center of the A-axis 31 and the fixed abutting block 21 and the connection line between the axis center of the A-axis 31 and the deviation abutting block 22 is an acute angle or a right angle;

[0051] Further, the horizontal position of the fixed abutting block 21 is higher than / equal to the horizontal position of the A-axis 31.

[0052] Specifically, the induction structure 4 includes a magnetic field induction device 41 fixedly arranged in the housing of the mounting base 1 and a magnetic member 42 arranged on the side wall of the A-axis 31.

[0053] More specifically, the magnetic field induction device 41 is a Hall effect sensor.

[0054] The magnetic member 42 can be any object with magnetism, such as a magnet. When the body presses down on the mounting base 1, the relative position between the magnetic member 42 on the A-axis 31 and the Hall effect sensor in the mounting base 1 remains unchanged, so the magnetic field strength and polarity sensed by the Hall effect sensor will not change; when the A-axis 31 rotates, the relative position between the magnetic member 42 and the Hall effect sensor changes, and the Hall effect sensor senses a change in the magnetic field strength, thereby transmitting a signal of the magnetic field change to the signal processing device on the lawn mower to inform the user that the wheels of the lawn mower are off the ground and a falling situation occurs.

[0055] Further, a groove 311 is provided along the circumferential direction of the A-axis 31 on the A-axis 31; a limiting member 111 is provided on the mounting base 1 and can be embedded in the groove 311 along the circumferential direction of the A-axis 31, and the A-axis 31 can rotate relative to the limiting member 111. The cooperation between the limiting member 111 and the groove 311 can limit the axial swing of the eccentric shaft 3 and prevent the eccentric shaft 3 from falling off during the driving process of the lawn mower.

[0056] Further, the mounting base 1 includes an upper box 11 and a lower cover 12. Specifically, the above-mentioned limiting member 111 is provided on the lower cover 12;

[0057] The A-axis 31 is arranged in the upper box 11, and the lower cover 12 is detachably connected to the upper box 11, which is convenient for assembling and repairing the falling induction structure.

[0058] A wheel includes the above-mentioned falling induction structure and a rim 51; the B-axis 32 passes through the rotation center of the rim 51 and is rotatably connected to the rim 51, and the central housing 2 is rotatably connected to the rim 51.

[0059] Specifically, a through groove is provided at the rotation center of the rim 51, and the B-axis 32 passes through the through groove and is rotatably connected to the rim 51;

[0060] Further, the wheel further includes a closing cover 52, the closing cover 52 is arranged opposite to the central housing 2, and the closing cover 52 is arranged on the side of the rim 51 facing away from the falling induction structure. The closing cover 52 and the central housing 2 cooperate with each other to fix the B-axis 32 in the through groove and prevent the B-axis 32 from falling out of the through groove during the rotation of the driven wheel 5.

[0061] A lawn mower includes the above-mentioned wheels, and when it encounters scenarios such as ditches and potholes, it can sense whether the driven wheels are off the ground.

[0062] The above is a specific description of the preferred embodiment of the present utility model. However, the present utility model is not limited to the described embodiment. Those skilled in the art can still make various equivalent deformations or substitutions without departing from the spirit of the present utility model, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A drop sensing structure, characterized in that, Comprising: A mounting base (1), which is arranged on one side of the passive wheel (5) of the transportation device and can be used to bear the weight of the body of the transportation device; A central housing (2), which is fixedly connected to the mounting base (1) and rotatably connected to the passive wheel (5); An eccentric shaft (3), which has an eccentric A-axis (31) and B-axis (32). The A-axis (31) passes through the mounting base (1) and the central housing (2). The B-axis (32) is coaxial with the rotation center on the passive wheel (5). The B-axis (32) rotates around the A-axis (31) and moves on the side of the central housing (2) facing away from the mounting base (1); A fixed stop block (21) is arranged on the central housing (2) within the swing radius of the B-axis (32); An induction structure (4) for sensing the movement of the eccentric shaft (3) is arranged on the mounting base (1) and / or the central housing (2); When the mounting base (1) bears the weight of the transportation device, the B-axis (32) remains in contact with the fixed stop block (21). When the passive wheel (5) leaves the ground, the B-axis (32) disengages from the fixed stop block (21).

2. The drop sensing structure according to claim 1, characterized in that: A deviation stop block (22) is also arranged on the central housing (2) within the swing radius of the B-axis (32). The deviation stop block (22) is arranged below the fixed stop block (21), and the fixed stop block (21) and the deviation stop block (22) are arranged on the same side of the central housing (2); When the passive wheel (5) leaves the ground, the B-axis abuts against the deviation stop block (22).

3. The drop sensing structure according to claim 1, wherein: The horizontal position of the fixed stop block (21) is higher than / equal to the horizontal position of the A-axis (31).

4. The drop sensing structure according to any one of claims 1-3, characterized in that: The induction structure (4) includes a magnetic field induction device (41) fixedly arranged inside the housing of the mounting base (1) and a magnetic member (42) arranged on the side wall of the A-axis (31).

5. The drop sensing structure according to claim 4, wherein: The magnetic field induction device (41) is a Hall effect sensor.

6. The drop sensing structure according to claim 1, wherein: A groove (311) is arranged along the circumferential direction of the A-axis (31) on the A-axis (31). A limiting member (111) that can be embedded in the groove (311) along the circumferential direction of the A-axis (31) is arranged on the mounting base (1). The A-axis (31) can rotate relative to the limiting member (111).

7. The drop sensing structure according to claim 1, wherein: The mounting base (1) includes an upper box (11) and a lower cover (12); The A-axis (31) is arranged inside the upper box (11), and the lower cover (12) is detachably connected to the upper box (11).

8. A wheel, characterized in that, Comprising the drop induction structure as described in any one of claims 1-7 above and a rim (51). The B-axis (32) passes through the rotation center of the rim (51) and is rotatably connected to the rim (51). The central housing (2) is rotatably connected to the rim (51).

9. The wheel according to claim 8, characterized in that, It further includes a closing cover (52). The closing cover (52) is arranged opposite to the central housing (2), and the closing cover (52) is arranged on the side of the rim (51) facing away from the drop induction structure.

10. A lawn mower, characterized in that: It includes a wheel as described in any one of claims 8-9 above.

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