Sealing structure of an automatic walking device

Abstract

The present invention discloses a sealing structure of an automatic walking device, comprising: a main cavity formed by the mating installation of an upper housing and a lower housing facing each other; a secondary cavity disposed inside the main cavity, where the secondary cavity is used to accommodate an outer motor wheel seat and an inner motor wheel seat. Among them, the outer motor wheel seat is installed at the upper part of the secondary cavity and is connected to the inner motor wheel seat installed at the lower part of the secondary cavity; a knob, the bottom of which is fixedly connected to the upper end of the outer motor wheel seat through a connecting column passing through the upper housing. By rotating the gear adjustment knob, the outer motor wheel seat is driven to rotate, and the rotation of the outer motor wheel seat drives the motor disposed in the motor fixing seat to move axially up and down. It further includes: a knob seal disposed between the outer wall of the connecting column and the upper housing, and the knob seal is used to achieve the seal between the knob and the main cavity, and the knob seal does not move with the insertion and extraction of the knob.

Description

Technical Field

[0001] The present invention relates to the field of structural waterproof sealing, and specifically to a sealing structure for an automatic walking device. Background Art

[0002] In existing intelligent lawn mowers, a mowing motor is installed in a motor barrel. The upper part of the motor barrel is connected to an adjusting member. By rotating the adjusting member, the user can adjust the height of the motor barrel, thereby adjusting the height of the mowing cutter head. The end of the cutting motor is connected to the cutting cutter head, which is used for cutting the lawn. The mowing motor and the cutting cutter head are usually in a dirty and humid environment, and puddles and other situations may also be encountered during mowing work. If water enters the motor, it is easy to cause motor damage and failures. Currently, only a sealing member is provided between the lower housing and the cutter head guard of the intelligent lawn mower, or a sealing member is provided at the motor output shaft, which is difficult to meet the high waterproof requirements of the motor. When the mowing cutter head needs to be cleaned, the mowing cutter head needs to be disassembled and cleaned, and the intelligent lawn mower cannot be directly rinsed with water. Summary of the Invention

[0003] In view of the above technical problems, the present invention provides a sealing structure that achieves a good sealing and waterproof effect for the whole machine, can adapt to the whole machine for rinsing, and is convenient for installation and disassembly.

[0004] To achieve the above technical objectives, the present invention adopts the following technical solutions:

[0005] A sealing structure for an automatic walking device, comprising:

[0006] A main cavity formed by the mutual cooperation and installation of an upper housing and a lower housing that face each other;

[0007] A secondary cavity disposed inside the main cavity, and the secondary cavity is used to accommodate an outer motor seat and an inner motor seat. Among them,

[0008] The outer motor seat is installed at the upper part of the secondary cavity and is connected to the inner motor seat installed at the lower part of the secondary cavity;

[0009] A knob, the bottom of which is connected to the upper end of the outer motor seat through a connecting column passing through the upper housing, and the knob can be inserted and pulled out relative to the upper housing. By rotating the gear adjustment knob, the outer motor seat is driven to rotate, and the rotation of the outer motor seat drives the motor disposed in the motor fixing seat to move up and down along the axis. Further included are:

[0010] A knob seal disposed between the outer wall of the connecting column and the upper housing, and the knob seal is used to achieve the seal between the knob and the main cavity, and the knob seal does not move with the insertion and extraction of the knob.

[0011] The knob seal is a double-layer annular structure with an H-shaped longitudinal section. A metal skeleton is provided inside the outer ring of the double-layer annular structure. The outer ring with the metal skeleton abuts against the upper housing, and the inner ring is sleeved outside the connecting column of the knob.

[0012] A motor is installed in the motor inner wheel seat. The bottom of the motor is connected to the motor fixing seat through a first fastening structure, and the motor fixing seat is connected to the bottom of the motor inner wheel seat through a second fastening structure. Seals are respectively provided on the first fastening structures between the motor fixing seat and the motor inner wheel seat and between the motor fixing seat and the motor.

[0013] Between the outer edges of the outer sides of the upper housing and the lower housing facing each other, a main cavity sealing strip is provided for sealing the main cavity formed by the upper housing and the lower housing.

[0014] 5. The sealing structure of the automatic walking device according to claim 3, wherein a rubber sheath is provided between the lower housing and the motor fixing seat. One end of the rubber sheath is fixedly connected to the lower housing, and the other end is press-fitted between the bottom of the motor inner wheel seat and the motor fixing seat.

[0015] The motor fixing seat includes a chassis main body, a chassis connecting portion provided in the middle of the chassis main body and protruding from the surface of the chassis main body, and a plurality of flanges provided on the outer periphery of the chassis. Among them, the chassis connecting portion is connected to the bottom of the motor through screws, a screw seal is sleeved on the screws, and a sealing ring is provided between the outer periphery of the chassis connecting portion and the motor inner wheel seat; the plurality of flanges are used to carry the rubber sheath to prevent the rubber sheath from directly contacting the rotating cutter head.

[0016] The motor output shaft of the motor extends out of the motor fixing seat and is connected to a cutting cutter head. A motor output shaft seal is provided between the motor output shaft and the motor fixing seat.

[0017] A through hole is opened at the top of the knob, and the inside of the knob connecting column is hollow.

[0018] A waterproof and breathable valve is installed on the through hole at the top of the knob.

[0019] The waterproof and breathable valve is communicated with the cavity where the motor is located through the through hole and the hollow inside of the knob connecting column in sequence. The heat generated when the motor works is discharged through the waterproof and breathable valve, and a dust cover is provided on the waterproof and breathable valve.

[0020] The motor is a double-output shaft motor, and a fan is connected to the upper rotating shaft of the double-output shaft motor.

[0021] The material of the motor fixing seat is made of a heat-conducting material.

[0022] On the upper surface of the cutting cutter head connected to the motor output shaft, a plurality of blades for dissipating heat from the motor fixing seat are provided.

[0023] The auxiliary cavity includes: an upper auxiliary cavity isolation wall, one end of which is connected to the inner wall of the upper shell, and the other end extends towards the main cavity;

[0024] a lower auxiliary cavity isolation wall, one end of which is connected to the inner wall of the lower shell, and the other end extends towards the main cavity;

[0025] A sealing strip installation groove is provided at the lower end of the upper auxiliary cavity isolation wall and / or the upper end of the lower auxiliary cavity isolation wall;

[0026] An auxiliary cavity sealing strip is arranged in the sealing strip installation groove between the mutually opposed upper auxiliary cavity isolation wall and lower auxiliary cavity isolation wall to seal the auxiliary cavity.

[0027] An automatic walking device includes the sealing structure described above.

[0028] Beneficial effects:

[0029] First. The present invention provides a knob seal at the knob. The knob seal can be fixed on the upper shell. Through the design of the metal skeleton, the seal does not move with the insertion and removal of the knob, facilitating the installation and removal of the knob, and having a simple structure.

[0030] Second. Through the design of the motor fixing seat, the motor can be directly taken out from below the machine, facilitating disassembly. Moreover, the lower part of the rubber sheath is installed between the lower shell and the motor fixing seat by press-fitting, with a simple structure and convenient disassembly.

[0031] Third. Seals are respectively provided on the fastening structures between the motor fixing seat and the motor inner wheel seat, and between the motor fixing seat and the motor. By providing sealing structures at multiple locations, the high waterproof requirements of the motor can be met, and the auxiliary cavity sealing structure and the lead sealing structure between the motor and the circuit board in the main cavity can be omitted, greatly simplifying the machine structure. The user can directly rinse the lawn mower.

[0032] Fourth. By combining the waterproof breathable valve and the fan, the motor can be effectively cooled.

[0033] Fifth. The motor fixing seat is made of metal material to improve the heat conductivity of the motor, and through the airflow generated by the rotation of the blades on the upper part of the cutter head, the motor can be effectively cooled. Description of the drawings

[0034] Figure 1 is a schematic assembly structure diagram of the intelligent lawn mower in Embodiment 1;

[0035] Among them, 1. Upper shell; 2. Lower shell; 5. Motor inner wheel seat; 6. Motor outer wheel seat; 7. Motor; 9. Knob; 10. Motor fixing seat; 11. Auxiliary cavity sealing strip; 12. Rubber sheath; 14. Knob seal; 20. Sealing ring;

[0036] Figure 2 It is a schematic cross-sectional structure diagram of the intelligent lawn mower in the first embodiment;

[0037] Among them, 3 is the upper auxiliary cavity isolation wall; 4 is the lower auxiliary cavity isolation wall; 8 is the motor output shaft; 13 is the motor output shaft seal; 19 is the screw;

[0038] Figure 3 It is a schematic installation structure diagram of the rubber sheath in the first embodiment;

[0039] Figure 4 It is a schematic cross-sectional structure diagram of the motor fixing seat in the first embodiment;

[0040] Among them, 101 is the chassis main body; 102 is the chassis connection part; 103 is the flange;

[0041] Figure 5 It is a schematic screw sealing structure diagram in the first embodiment;

[0042] Among them, 16 is the screw; 17 is the sealing ring; 18 is the screw seal installation groove;

[0043] Figure 6 It is a schematic motor output shaft sealing structure diagram in the first embodiment;

[0044] Figure 7 It is a schematic knob sealing structure diagram in the first embodiment;

[0045] Figure 8 It is a schematic cross-sectional view of the knob seal in the first embodiment;

[0046] Among them, 15 is the metal skeleton;

[0047] Figure 9 It is a schematic cross-sectional structure diagram of the intelligent lawn mower in the second embodiment;

[0048] Among them, 21 is the waterproof and breathable valve; 22 is the fan;

[0049] Figure 10 It is a schematic blade structure diagram in the second embodiment;

[0050] Among them, 23 is the heat dissipation blade. Specific embodiments

[0051] Embodiment 1

[0052] As Figure 1 shown, the lawn mowing robot is installed by the mutual cooperation of the upper shell 1 and the lower shell 2 to form a main cavity. The main cavity sealing device includes a main cavity sealing strip arranged on the outer edge of the lower shell 2, and the outer edge of the upper shell 1 presses the main cavity sealing strip.

[0053] As Figure 1-2As shown, a secondary cavity is also provided inside the main cavity. The specific structure of the secondary cavity seal is as follows: The upper housing 1 is provided with an upper secondary cavity isolation wall 3 facing the interior of the machine, and the lower housing 2 is provided with a lower secondary cavity isolation wall 4 facing the interior of the machine. An installation groove is provided on one side of the lower secondary cavity isolation wall 4. The installation groove of the upper secondary cavity isolation wall 3 and the lower secondary cavity isolation wall 4 are docked to form the secondary cavity. A secondary cavity sealing strip 11 is provided in the installation groove, and the lower end of the upper secondary cavity isolation wall 3 presses against the secondary cavity sealing strip 11.

[0054] The secondary cavity is used to accommodate the motor inner wheel seat 5 and the motor outer wheel seat 6. The outer side of the upper part of the motor inner wheel seat 5 is provided with an external thread, and the inner wall of the motor outer wheel seat 6 is provided with an internal thread. The motor inner wheel seat 5 and the motor outer wheel seat 6 are connected by threads. A motor 7 is installed inside the motor inner wheel seat 5. The bottom of the motor 7 is connected to the motor fixing seat 10 by screws, and the motor fixing seat 10 is connected to the bottom of the motor inner wheel seat 5 by screws.

[0055] In order to prevent water from entering the motor, multiple sealing structures are designed as follows:

[0056] As Figure 2 、 3 shown, a rubber sheath 12 is provided between the lower housing 2 and the motor fixing seat 10. One end of the rubber sheath 12 is fixedly connected to the lower housing 2, and the other end is press-fitted between the motor inner wheel seat 5 and the motor fixing seat 10. The rubber sheath is a corrugated and telescopic structure.

[0057] As Figure 2 、 4 shown, the motor fixing seat 10 includes a chassis main body 101, a chassis connecting part 102 provided in the middle of the chassis main body and protruding from the surface of the chassis main body, and a plurality of flanges 103 provided on the outer periphery of the chassis. The chassis connecting part is connected to the bottom of the motor 7 by screws 16, the chassis main body is connected to the motor inner wheel seat 5 by screws, and a sealing ring 20 is provided between the outer periphery of the chassis connecting part and the motor inner wheel seat 5 to prevent water entering from the gap between the screw 19 and the motor fixing seat 10 from entering the motor.

[0058] The sealing ring 20 is preferably an O-ring.

[0059] The plurality of flanges can be used to support the rubber sheath 12 to prevent the rubber sheath 12 from directly contacting the rotating cutter head, thereby damaging the rubber sheath and losing the waterproof function of the rubber sheath.

[0060] As Figure 2 、 5 shown, the chassis connecting part is connected to the bottom of the motor 7 by a plurality of screws 16. A screw seal 17 is sleeved on the screw 16 to prevent water from entering through the gap between the screw 16 and the motor fixing seat 10. A screw seal installation groove 18 is provided in the chassis connecting part of the motor fixing seat 10 to accommodate the screw seal 17 for a tightly fitting installation.

[0061] The screw seal is preferably an O-ring.

[0062] As Figure 2 , 6 shown, after the motor output shaft 8 of the motor 7 extends out of the motor fixing seat 10, it is connected to the cutting tool disc. An output shaft seal 13 is provided between the motor output shaft 8 and the motor fixing seat 10, for example, it is a felt.

[0063] As Figure 2 , 7 shown, the upper end of the outer motor seat 6 is fixedly connected to the knob 9. The knob 9 can be rotated by the user to drive the outer motor seat 6 to rotate, but it cannot move up and down, thereby driving the inner motor seat 5 to move up and down to adjust the height of the cutting tool disc. A knob seal 14 is provided between the connecting column of the knob 9 and the upper housing 1. As Figure 8 shown, the knob seal 14 is a double-layer annular structure with an H-shaped cross-sectional structure. A metal skeleton is provided inside the outer ring of the double-layer annular structure. The outer ring abuts against the upper housing 1, and the inner ring is sleeved outside the connecting column of the knob 9. The knob seal 14 is made of rubber. Through the design of the metal skeleton structure, when the knob 9 is installed and disassembled, the knob seal 14 can be well fixed on the upper housing 1 without displacement along with the knob 9, which is convenient for the assembly and disassembly of the knob.

[0064] When disassembling, replacing, and repairing the motor, only the screw 19 needs to be removed, and the motor fixing seat and the motor can be taken out from the bottom together.

[0065] Embodiment 2

[0066] Other structures are exactly the same as those in Embodiment 1. The differences are as Figures 9-10 shown. In this embodiment, a waterproof and breathable valve 21 is installed on the knob 9. The connecting column of the knob 9 is hollow inside. A through hole is provided in the upper part of the outer motor seat 6. The inside of the connecting column of the knob 9 is communicated with the cavity where the motor 7 is located through the through hole. The heat generated during the operation of the motor can be discharged through the waterproof and breathable valve 21. A dust-proof cover is provided on the waterproof and breathable valve 21, and the exhaust hole of the waterproof and breathable valve is arranged on the side, which can avoid pollution and blockage of the exhaust hole of the waterproof and breathable valve by dust, grass mud, etc. A fan 22 is provided on the upper part of the motor 7. The motor 7 drives the fan 22 to rotate to generate an air flow, and the air flow flows out from the waterproof and breathable valve 21, which can effectively dissipate heat from the motor 7 without the need to add an additional power device.

[0067] In order to further improve the heat dissipation effect of the motor, the motor fixing seat 10 is made of a metal material. Since the motor is also made of a metal material, the heat generated by the motor can be conducted to the outside through the metal motor fixing seat 10. A plurality of blades 23 are provided on the upper surface of the tool disc. When the tool disc rotates, the blades rotate simultaneously to generate an air flow to dissipate heat from the motor fixing seat 10.

[0068] Embodiment 3

[0069] The other structures are exactly the same as those in Embodiment 1, and the auxiliary cavity sealing structure is omitted in this embodiment. Since there is a main cavity sealing structure between the upper shell and the lower shell, a knob sealing structure is provided between the knob and the upper shell, and sealing structures are provided between the motor fixing seat and the lower shell, between the motor fixing seat and the motor inner wheel seat, and outside the motor output shaft, which can ensure a good waterproof effect. There is no need to provide an additional waterproof structure at the auxiliary cavity. Moreover, there is no need to provide an additional waterproof structure for the leads of the motor 7 in the auxiliary cavity and the circuit board in the main cavity, making the structure of the intelligent lawn mower simpler and having a good waterproof and sealing effect.

Claims

1. A sealing structure of an automatic walking device, comprising: A main cavity formed by the mating installation of an upper housing and a lower housing facing each other; A secondary cavity provided inside the main cavity, where the secondary cavity is used to accommodate an outer motor wheel seat and an inner motor wheel seat. Among them, the outer motor wheel seat is installed at the upper part of the secondary cavity and is connected to the inner motor wheel seat installed at the lower part of the secondary cavity; A knob, the bottom of which is connected to the upper end of the outer motor wheel seat through a connecting column passing through the upper housing, and the knob can be inserted into and pulled out relative to the upper housing. By rotating the gear adjustment knob, the outer motor wheel seat is driven to rotate, and the rotation of the outer motor wheel seat drives the motor arranged in the motor fixing seat to move up and down along the axis. It is characterized in that it further includes: a knob seal, arranged between the outer wall of the connecting column and the upper housing, and the knob seal is used to achieve the seal between the knob and the main cavity, and the knob seal does not move with the insertion and extraction of the knob; A through hole is opened at the top of the knob, and the inside of the knob connecting column is hollow; A waterproof and breathable valve is installed on the through hole at the top of the knob; The waterproof and breathable valve is communicated with the cavity where the motor is located through the through hole and the hollow inside of the knob connecting column in sequence. The heat generated when the motor works is discharged through the waterproof and breathable valve, and a dust-proof cover is provided on the waterproof and breathable valve.

2. The sealing structure of the automatic walking device according to claim 1, characterized in that, The knob seal is a double-layer annular structure with an H-shaped longitudinal section. A metal skeleton is provided inside the outer ring of the double-layer annular structure. The outer ring with the metal skeleton abuts against the upper housing, and the inner ring is sleeved outside the connecting column of the knob.

3. The sealing structure of the automatic walking device according to claim 1, characterized in that A motor is installed inside the inner motor wheel seat. The bottom of the motor is connected to the motor fixing seat through a first fastening structure, and the motor fixing seat is connected to the bottom of the inner motor wheel seat through a second fastening structure. Seals are respectively provided on the first fastening structures between the motor fixing seat and the inner motor wheel seat, and between the motor fixing seat and the motor.

4. The sealing structure of the automatic walking device according to claim 1, characterized in that, Between the outer edges of the outer sides of the upper housing and the lower housing facing each other, a main cavity sealing strip is provided for sealing the main cavity formed by the upper housing and the lower housing.

5. The sealing structure of the automatic walking device according to claim 3, characterized in that, A rubber sheath is provided between the lower housing and the motor fixing seat. One end of the rubber sheath is fixedly connected to the lower housing, and the other end is press-fitted between the bottom of the inner motor wheel seat and the motor fixing seat.

6. The sealing structure of the automatic walking device according to claim 5, characterized in that, The motor fixing seat includes a chassis main body, a chassis connecting part provided in the middle of the chassis main body and protruding from the surface of the chassis main body, and several flanges provided on the outer periphery of the chassis. Among them, the chassis connecting part is connected to the bottom of the motor through screws, and a screw seal is sleeved on the screws. A sealing ring is provided between the outer periphery of the chassis connecting part and the inner motor wheel seat; several of the flanges are used to carry the rubber sheath to prevent the rubber sheath from directly contacting the rotating cutter disc.

7. The sealing structure of the automatic walking device according to claim 1, characterized in that, After the motor output shaft of the motor extends out of the motor fixing seat, it is connected to a cutting cutter disc, and a motor output shaft seal is provided between the motor output shaft and the motor fixing seat.

8. The sealing structure of the automatic walking device according to claim 1, characterized in that The motor is a double-output shaft motor, and a fan is connected to the upper rotating shaft of the double-output shaft motor.

9. The sealing structure of the automatic walking device according to claim 1, characterized in that, The material of the motor fixing seat is made of a heat-conducting material.

10. The sealing structure of the automatic walking device according to claim 7, characterized in that, Several blades for dissipating heat from the motor fixing seat are provided on the upper surface of the cutting cutter disc connected to the motor output shaft.

11. The sealing structure of the automatic walking device according to claim 1, characterized in that, The auxiliary cavity includes: an upper auxiliary cavity isolation wall, one end of which is connected to the inner wall of the upper housing and the other end extends towards the main cavity; a lower auxiliary cavity isolation wall, one end of which is connected to the inner wall of the lower housing and the other end extends towards the main cavity; a sealing strip installation groove is provided at the lower end of the upper auxiliary cavity isolation wall and / or the upper end of the lower auxiliary cavity isolation wall; an auxiliary cavity sealing strip, which is arranged in the sealing strip installation groove between the mutually opposed upper auxiliary cavity isolation wall and the lower auxiliary cavity isolation wall to seal the auxiliary cavity.

12. An automatic walking device, comprising the sealing structure according to any one of claims 1-11.

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