Scram control assembly and automatic mower

Abstract

The utility model provides a sudden stop control assembly and an automatic mower, the sudden stop control assembly is used for controlling the automatic mower to stop suddenly, the automatic mower comprises a movable wheel, and the sudden stop control assembly comprises a support; the hanging assembly is installed on the support, the hanging assembly is provided with an inducted part and used for enabling the inducted part to move in the vertical direction, and the hanging assembly is connected with the movable wheel; the sensor is mounted on the bracket and is used for sensing the position of the sensed part; and the controller is connected with the sensor and is used for controlling the automatic mower to stop running under the condition that the sensor senses that the sensed part descends to the lowest position. The emergency stop control assembly can prevent a cutting knife of the automatic mower from accidentally injuring a user when the user lifts the automatic mower.

Description

Technical Field

[0001] The utility model relates to the field of automatic operating equipment, in particular to an emergency stop control component movable wheel and an automatic lawn mower. Background Art

[0002] With the continuous advancement of computer technology and artificial intelligence technology, mobile devices have entered people's lives, such as automatic lawn mowers similar to intelligent robots. Automatic lawn mowers can automatically mow grass in parks, gardens, communities, golf courses, etc. without manual operation, which greatly reduces manpower and improves work efficiency.

[0003] In the prior art, when the automatic lawn mower is in operation, its blade rotates at high speed. When the running lawn mower body needs to be lifted manually, if the blade is still in operation, it is easy to accidentally injure others, resulting in poor safety in the use of the lawn mower. Utility Model Content

[0004] The utility model provides an emergency stop control component and an automatic lawn mower to improve the use safety of the automatic lawn mower.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions.

[0006] In a first aspect, the utility model provides an emergency stop control assembly for controlling an automatic lawn mower to stop suddenly, wherein the automatic lawn mower includes a movable wheel and is characterized in that it includes:

[0007] Bracket;

[0008] A suspension assembly is installed on the bracket, the suspension assembly is equipped with a sensed component and is used to enable the sensed component to move in a vertical direction, and the suspension assembly is connected to the movable wheel;

[0009] A sensor, mounted on the bracket and used to sense the position of the sensed component;

[0010] The controller is connected to the sensor and is used to control the automatic lawn mower to stop running when the sensor senses that the sensed component has dropped to the lowest position.

[0011] In some embodiments, the suspension assembly comprises:

[0012] a first connecting plate connected to the movable wheel;

[0013] A guide column, one end of which is connected to the first connecting plate, and the sensed component is installed at one end of the guide column away from the first connecting plate;

[0014] The support assembly comprises a sliding sleeve and a fixed sleeve, wherein the fixed sleeve is vertically mounted on the bracket, and the sliding sleeve is fixed in the fixed sleeve and slidably sleeved on the guide column.

[0015] In some embodiments, a front reinforcement is provided on the front side of the first enclosure section, and the front reinforcement is a metal member. The support assembly also includes a mounting plate, which is mounted on an end of the guide column away from the first connecting plate, and the size of the mounting plate is larger than the inner diameter of the fixing sleeve.

[0016] In some embodiments, a stop protrusion is provided on the end surface of the fixing sleeve away from the first connecting plate, and a notch adapted to the stop protrusion is opened at the edge of the mounting plate. The stop protrusion is located at the notch, and the height of the stop protrusion is not less than the movable distance of the guide column.

[0017] In some embodiments, the mounting plate includes a bottom plate and a vertical plate perpendicular to the bottom plate, the bottom plate is mounted on the end surface of the guide column away from the first connecting plate, and the sensed member is mounted on the vertical plate.

[0018] In some embodiments, the support assembly further includes a sealing cover and a sealing ring, wherein the sealing cover is disposed on the fixing sleeve; the sealing ring is sleeved on the fixing sleeve and is disposed between the fixing sleeve and the bracket.

[0019] In some embodiments, a first surface of the first connecting plate is provided with a groove, a bottom surface of the groove is provided with a through hole, and the first surface of the first connecting plate is connected to the movable wheel;

[0020] The guide column comprises a guide portion and a connecting portion connected to the guide portion, the cross section of the connecting portion is adapted to the through hole, an end of the connecting portion away from the guide portion is provided with a flange, the connecting portion is provided at the through hole, the flange is located in the groove and contacts the first connecting plate;

[0021] The sliding sleeve can be slidably mounted on the guide portion.

[0022] In some embodiments, the second connecting plate of the movable wheel is connected to the first surface; the flange is clamped between the first connecting plate and the second connecting plate, and the thickness of the flange is greater than the depth of the groove.

[0023] In some embodiments, the thickness of the flange differs from the depth of the groove by 0.5-1.5 mm;

[0024] and / or,

[0025] The side of the flange facing the bottom surface of the groove contacts the bottom surface of the groove to form an annular contact surface, and the width of the annular contact surface is 1-1.5 times the thickness of the flange.

[0026] In some embodiments, the sensed member is a magnetic member, and the sensor is a magnetic sensor.

[0027] In a second aspect, the present invention further provides an automatic lawn mower, comprising the emergency stop control assembly described in any one of the above embodiments, wherein the lawn mowing mechanism is installed on the automatic moving device.

[0028] Beneficial effect: The utility model discloses an emergency stop control component and an automatic lawn mower, wherein the emergency stop control component is used to control the emergency stop of the automatic lawn mower. When the automatic lawn mower is traveling on the road, the sensed part on the suspension component is located at the highest position of the movable range. When the automatic lawn mower is in a suspended or lifted state, due to the gravity of the movable wheel, the sensed part is driven by the suspension component to slide vertically downward to the lowest position. When the sensor senses that the position of the sensed part moves, the controller controls the automatic lawn mower to stop running, thereby preventing the cutting knife of the automatic lawn mower from accidentally injuring the user when the user lifts the automatic lawn mower. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the implementation modes of the present invention, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of the structure of an emergency stop control assembly provided in an embodiment of the utility model is shown;

[0031] Figure 2 A front view of an emergency stop control assembly provided in an embodiment of the utility model is shown;

[0032] Figure 3 A top view of an emergency stop control assembly provided in an embodiment of the utility model is shown;

[0033] Figure 4 An exploded view of a suspension assembly and a movable wheel provided in an embodiment of the utility model is shown;

[0034] Figure 5 A schematic diagram of the structure of the suspension assembly and the movable wheel provided in an embodiment of the utility model is shown;

[0035] Figure 6 A cross-sectional view of an emergency stop control assembly provided by an embodiment of the utility model is shown;

[0036] Figure 7 A schematic structural diagram of a fixing sleeve provided in an embodiment of the utility model is shown;

[0037] Figure 8 A schematic diagram of the structure of the mounting plate provided in an embodiment of the utility model is shown;

[0038] Fig. 9 A schematic structural diagram of a first connecting plate and a guide column provided in an embodiment of the utility model is shown;

[0039] Fig.10 A schematic structural diagram of a first connecting plate and a guide column combination provided in an embodiment of the utility model is shown;

[0040] Fig.11 A structural schematic diagram showing another perspective of the combination of the first connecting plate and the guide column provided in an embodiment of the utility model;

[0041] Fig.12 A cross-sectional view of a first connecting plate and a guide column combination provided in an embodiment of the utility model is shown.

[0042] Description of Figure Numbers:

[0043] 10. Bracket; 20. Suspension assembly; 21. First connecting plate; 211. First surface; 212. Groove; 213. Through hole; 22. Guide column; 221. Guide portion; 222. Connecting portion; 223. Flange; 23. Support assembly; 231. Sliding sleeve; 232. Fixing sleeve; 2321. Anti-rotation protrusion; 233. Mounting plate; 2331. Notch; 2332. Bottom plate; 2333. Vertical plate; 25. Sealing cover; 26. Sealing ring; 30. Induced member 40. Sensor; 50. Controller; 60. Movable wheel; 61. Second connecting plate; 70. Threaded fastener; 80. Circlip DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0045] It should be noted that, in the present invention, unless otherwise clearly specified or limited, the terms "installation", "connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, or a transmission connection; it can be a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as specific or special structures. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present utility model, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present utility model and the features of different embodiments or examples without contradiction.

[0047] In addition, when a component is considered to be "disposed on" another component, it can be connected to or directly disposed on the other component, or there may be an intervening component at the same time; when a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component at the same time.

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0049] Reference Figure 1-Figure 6 In the first aspect, the utility model proposes an emergency stop control assembly for controlling an automatic lawn mower to stop suddenly, and the automatic lawn mower includes a movable wheel 60. The emergency stop control assembly includes: a bracket 10, a suspension assembly 20, a sensor 40 and a controller 50; the suspension assembly 20 is mounted on the bracket 10, the suspension assembly 20 is equipped with a sensed part 30 and is used to make the sensed part 30 movable in the vertical direction, and the suspension assembly 20 is connected to the movable wheel 60; the sensor 40 is mounted on the bracket 10 and is used to sense the position of the sensed part 30; the controller 50 is connected to the sensor 40 and is used to control the automatic lawn mower to stop running when the sensor 40 senses that the sensed part 30 has dropped to the lowest position.

[0050] Specifically, the suspension assembly 20 and the sensor 40 are both installed on the bracket 10. The suspension assembly 20 is used to connect the movable wheel 60 and the bracket 10. In order to detect the state of the movable wheel 60, the sensed part 30 is installed on the suspension assembly 20, and the sensed part 30 can be moved in the vertical direction through the suspension assembly 20. When the movable wheel is on the ground, the sensed part 30 is located at the highest position within the limited position range, and when the movable wheel is suspended, the sensed part 30 is located at the lowest position within the limited position range. Generally speaking, the suspension of the movable wheel is because the user lifts the lawn mower. Due to the gravity of the movable wheel, the suspension assembly 20 drives the sensed part 30 to move downward to the lowest position. At this time, the sensor 40 senses the change in the position of the sensed part 30 and generates a signal and sends it to the controller 50. After receiving the signal, the controller 50 controls the automatic lawn mower to stop running, thereby preventing the user from being accidentally injured by the blade. The sensed part 30 can be a magnetic part, a light transmitter or an ultrasonic transmitter, etc., and the corresponding sensor 40 can be a magnetic sensor, an optical position sensor, an ultrasonic sensor, etc.

[0051] In some embodiments, the suspension assembly 20 includes a first connecting plate 21, a guide column 22, and a support assembly 23. The first connecting plate 21 is connected to the movable wheel 60; one end of the guide column 22 is connected to the first connecting plate 21, and the sensed member 30 is installed at the end of the guide column 22 away from the first connecting plate 21; the support assembly 23 includes a sliding sleeve 231 and a fixed sleeve 232, the fixed sleeve 232 is vertically installed on the bracket 10, and the sliding sleeve 231 is fixed in the fixed sleeve 232 and slidably sleeved on the guide column 22.

[0052] Specifically, the first connecting plate 21, the guide column 22 and the support assembly 23 are usually made of metal. The guide column 22 can be an ordinary column, so that the column is vertically arranged on one side of the first connecting plate 21, one end of the column is fixed to the first connecting plate 21, and the other end is fixed to the sensed component 30. The guide column 22 can also be a column with a flange 223, so that the first connecting plate 21 is provided with a through hole 213 adapted to the size of the guide column 22, so that the guide column 22 passes through the through hole 213 until the flange 223 contacts the first connecting plate 21, and the guide column 22 is fixedly connected to the first connecting plate 21. Both methods form a structure in which the column is perpendicular to the first connecting plate 21.

[0053] The fixing sleeve 232 is mounted on the bracket 10 and can be fixed on the bracket 10 by a threaded fastener 70. A sliding sleeve 231 is fixed inside the fixing sleeve 232, and the sliding sleeve 231 is used to sleeve the guide column 22, that is, the guide column 22 is in sliding contact with the sliding sleeve 231, so that the guide column 22 can slide in the vertical direction. The fixing of the sliding sleeve 231 can be fixed by snap-fitting or by locking screws. In a specific embodiment, the lower part of the inner side surface of the fixing sleeve 232 has a limiting protrusion, and the limiting protrusion is used to limit the downward movement of the sliding sleeve 231 relative to the fixing sleeve 232. At the same time, an installation bayonet is opened on the upper part of the inner side surface, and a retaining spring 80 is clamped at the installation bayonet to limit the upward movement of the sliding sleeve 231 relative to the fixing sleeve 232, so that the sliding sleeve 231 is fixed in the fixing sleeve 232. The sliding sleeve 231 is sleeved on the guide portion 221 , and the guide portion 221 is slidable relative to the sliding sleeve 231 , so that the guide portion 221 slides in the vertical direction relative to the support assembly 23 , and then the sensed component 30 mounted on the guide column 22 can slide in the vertical direction.

[0054] In one embodiment, the sliding sleeve 231 is a self-lubricating graphite copper sleeve, which is formed by embedding graphite in brass and has a lower friction coefficient, so that the guide column 22 can slide more smoothly in the sliding sleeve 231 .

[0055] In some embodiments, the support assembly 23 further includes a mounting plate 233 , which is mounted on an end of the guide column 22 away from the first connecting plate 21 , and a size of the mounting plate 233 is larger than an inner diameter of the fixing sleeve 232 .

[0056] Specifically, the mounting plate 233 is used to limit the sliding distance of the guide column 22. Specifically, a screw hole can be opened on the end face of the guide column 22 away from the movable wheel 60, and a through hole 213 compatible with the screw hole is opened on the mounting plate 233. The mounting plate 233 is locked and fixed to the end face with a cup head screw. At the same time, the size of the mounting plate 233 is larger than the inner ring size of the fixing sleeve 232. In this way, when the guide column 22 moves downward, the fixing sleeve 232 can support the mounting plate 233, thereby limiting the sliding of the guide column 22.

[0057] Of course, there are other ways to limit the downward movement of the guide column 22. For example, a limiting protrusion can be set at one end of the guide column 22 away from the first connecting plate 21, so that when the guide column 22 moves downward, the limiting protrusion is supported by the fixing sleeve 132, thereby limiting the downward movement of the guide column 22.

[0058] See also Figure 5 , Figure 7 and Figure 8In some embodiments, a stop protrusion 2321 is provided on the end surface of the fixing sleeve 232 away from the first connecting plate 21, and a notch 2331 adapted to the stop protrusion 2321 is opened on the edge of the mounting plate 233. The stop protrusion 2321 is located at the notch 2331, and the height of the stop protrusion 2321 is not less than the movable distance of the guide column 22.

[0059] Specifically, the height of the stop protrusion 2321 refers to the length of the stop protrusion 2321 in the vertical direction, and the movable distance of the guide column 22 refers to the distance that the guide column 22 can slide in the vertical direction. The stop protrusion 2321 is located in the notch 2331 and the height of the stop protrusion 2321 is not less than the movable distance of the guide column 22. In this way, in the process of the guide column 22 moving up and down, the stop protrusion 2321 limits the rotation of the guide column 22, thereby not affecting the rotation of the movable wheel itself.

[0060] In some embodiments, the mounting plate 233 includes a bottom plate 2332 and a vertical plate perpendicular to the bottom plate 2332 , the bottom plate 2332 is mounted on the end surface of the guide column 22 away from the first connecting plate 21 , and the sensed component 30 is mounted on the vertical plate.

[0061] Specifically, the bottom plate 2332 is used to connect with the guide column 22, and the vertical plate is used to fix the sensed member 30. The magnetic sensed member 30 can be fixed on the vertical plate by bonding, clamping or bolting. The sensed member 30 can be used to be sensed by the sensor 40, so that the controller 50 can detect the position of the movable wheel 60 to control the blade of the automatic lawn mower to stop running.

[0062] In some embodiments, the support assembly further includes a sealing cover 25 and a sealing ring 26 . The sealing cover 25 is covered on the fixing sleeve 232 . The sealing ring 26 is sleeved on the fixing sleeve 232 and is disposed between the fixing sleeve 232 and the bracket 10 .

[0063] Specifically, the sealing cover 25 is used to cover the interior of the fixing sleeve 232, and the sealing ring 26 is used to seal the gap between the fixing sleeve 232 and the bracket 10, thereby forming a continuous sealing structure on the upper part of the bracket 10 to achieve a full range of internal and external water-proofing effects.

[0064] In some embodiments, a groove 212 is provided on the first surface 211 of the first connecting plate 21, a through hole 213 is opened on the bottom surface of the groove 212, and the first surface 211 of the first connecting plate 21 is connected to the movable wheel 60; the guide column 22 includes a guide portion 221 and a connecting portion 222 connected to the guide portion 221, the cross-section of the connecting portion 222 is adapted to the through hole 213, and a flange 223 is provided on the end of the connecting portion 222 away from the guide portion 221, the connecting portion 222 is arranged at the through hole 213, the flange 223 is located in the groove 212 and contacts the first connecting plate 21; the sliding sleeve 231 can be slidably mounted on the guide portion 221.

[0065] Specifically, a groove 212 is formed on the first surface 211 of the first connecting plate 21, that is, on the surface facing the movable wheel 60. The size of the groove 212 needs to be able to accommodate the entire flange 223. In the method of forming the groove 212 on the first surface 211, if the plate is thick, the groove can be directly dug on the first surface 211 of the first connecting plate 21. If the plate is thin, such as Fig.10 and, Fig.11 and Fig.12 As shown, a groove 212 can be pressed out of the first surface 211 , and a boss corresponding to the groove 212 can be formed on the other surface of the first connecting plate 21 , that is, the groove 212 is formed by deformation of the plate.

[0066] A through hole 213 is provided at the bottom of the groove 212, and the size of the through hole 213 is adapted to the cross section of the connecting portion 222 of the guide post 22, that is, the connecting portion 222 can just pass through the through hole 213. For example, if the through hole 213 is a circular hole and the cross section of the guide post 22 as a whole is circular, then the diameter of the circular hole is equal to the diameter of the cross section of the connecting portion 222 of the guide post 22.

[0067] The guide column 22 is designed to include two parts, one part is the guide part 221, and the guide part 221 is used to move in the vertical direction relative to the support assembly 23. It should be noted that the vertical direction refers to the direction perpendicular to the robot chassis during the use of the suspension assembly 20. The other part is the connecting part 222, and the connecting part 222 is used to connect with the first connecting plate 21. A flange 223 is provided at one end of the connecting part 222 away from the guide part 221. The shape of the flange 223 can be any shape such as a rectangle, a triangle, a trapezoid, etc. The flange 223 is located in the groove 212 and contacts with the bottom of the groove 212. In this way, the guide column 22 can be increased when subjected to a positive force. The force arm increases, thereby enhancing the strength of the entire guide column 22, and can resist the impact force received by the movable wheel, preventing the guide column 22 from breaking. At the same time, the connection between the suspension component 20 and the movable wheel 60 is usually achieved through a surface connection of two plates, that is, the connecting plate of the suspension component 20 and the connecting plate of the movable wheel 60 are stacked and fixed by threaded fasteners 70. Since the flange 223 needs to have a certain thickness to have a certain strength, if the groove 212 is not provided, a "seesaw" phenomenon is likely to occur when installing the suspension component 20 and the movable wheel 60, resulting in inconvenient installation. Therefore, the groove 212 can provide sufficient space to accommodate the flange 223, so that the thickness of the flange 223 can be adjusted as needed to achieve the desired strength while facilitating the installation of the suspension component 20 and the movable wheel 60.

[0068] In some embodiments, the second connecting plate 61 of the movable wheel 60 is connected to the first surface 211 ; the flange 223 is sandwiched between the first connecting plate 21 and the second connecting plate 61 , and the thickness of the flange 223 is greater than the depth of the groove 212 .

[0069] Specifically, the movable wheel 60 selected in this embodiment includes a universal wheel and a second connecting plate 61 rotatably connected to the universal wheel. The second connecting plate 61 is used to connect with the first connecting plate 21, so as to fix the movable wheel 60 to the suspension assembly 20. The flange 223 is sandwiched between the first surface 211 of the first connecting plate 21 and the surface of the second connecting plate 61 facing away from the universal wheel, so as to form a "sandwich" structure. At the same time, the thickness of the flange 223 needs to be slightly greater than the depth of the groove 212, that is, the end surface of the guide column 22 close to the movable wheel 60 slightly protrudes from the second surface of the first connecting plate 21, so as to increase the bending moment resistance of the suspension assembly 20 and further improve the strength of the suspension assembly 20.

[0070] In some embodiments, the thickness of the flange 223 differs from the depth of the groove 212 by 0.5-1.5 mm.

[0071] Specifically, after the first connecting plate 21 and the second connecting plate 61 are stacked and locked, there will be a slight bending deformation. Since the two plates are made of metal, the degree of deformation is generally small. The difference between the thickness of the flange 223 and the depth of the groove 212 is in the range of 0.5-1.5mm, that is, the height of the end face of the guide column 22 close to the movable wheel 60 protruding from the first connecting plate 21 is controlled to be 0.5-1.5mm, so that the stability of the connection structure between the suspension component 20 and the movable wheel 60 can be further improved. In one embodiment, the thickness of the flange 223 differs from the depth of the groove 212 by 0.8-1.2mm. Further, the thickness of the flange 223 differs from the depth of the groove 212 by 1mm. The specific difference can also be determined according to actual conditions.

[0072] In some embodiments, one side of the flange 223 facing the bottom surface of the groove 212 contacts the bottom surface of the groove 212 to form an annular contact surface, and the width of the annular contact surface is 1-1.5 times the thickness of the flange 223 .

[0073] Specifically, the side of the flange 223 facing the bottom of the groove 212 is in contact with the bottom surface of the groove 212 to form an annular contact surface, so that the force arm that can be formed can be maximized when the height of the flange 223 is determined, and the forces in all directions are equal, further improving the strength of the suspension component 20. The larger the width of the annular contact surface, the higher the connection strength between the guide column 22 and the first connecting plate 21, but the processing cost of the guide column 22 will be higher. The width of the annular contact surface is controlled to be 1-1.5 times the thickness of the flange 223, which can balance the required strength of the suspension component 20 and the processing cost of the guide column 22.

[0074] In some embodiments, the shape and size of the cross section of the guide portion 221 are the same as the shape and size of the connecting portion 222 , and the guide column 22 is connected to the first connecting plate 21 by welding.

[0075] Specifically, the guide column 22 is fixedly connected to the first connecting plate 21 by welding. The shape and size of the cross section of the guide portion 221 are the same as the shape and size of the connecting portion 222, that is, the guide portion 221 and the connecting portion 222 form a column with a constant cross section. During processing, the column passes through the through hole 213 of the first connecting plate 21 until the flange 223 abuts against the bottom surface of the groove 212, and then the first surface 211 of the first connecting plate 21 is welded to the guide column 22, and the flange 223 is welded to the bottom surface and / or side surface of the groove 212. The structure of this embodiment can be applied to welding processing, and the welding processing is suitable for small batch processing.

[0076] In some embodiments, there is a processing width between the flange 223 and the side of the groove 212, and / or the angle between the bottom of the groove 212 and the side of the groove 212 is an obtuse angle.

[0077] Specifically, the welding process needs to reserve a certain processing width to facilitate the welding operation. The size of the groove 212 can be set larger than the size of the flange 223, or the angle between the bottom and the side of the groove 212 is processed to be an obtuse angle. In this way, a certain width can be reserved to facilitate the welding and fixing of the guide column 22 and the first connecting plate 21.

[0078] In some embodiments, the cross-sectional dimension of the guide portion 221 is greater than the cross-sectional dimension of the connection portion 222 , and the guide post 22 is connected to the first connection plate 21 by cold heading.

[0079] Specifically, the guide column 22 and the connecting plate can also be fixedly connected by cold heading, and the cross-sectional dimension of the guide portion 221 is larger than the cross-sectional dimension of the connecting portion 222, that is, the guide portion 221 and the connecting portion 222 form a column with a constant cross-sectional shape but different dimensions. In other words, the structure formed by the cold heading method is: the guide portion 221 is pressed into a flange, the flange 223 serves as another flange, and the two flanges clamp the first connecting plate 21. Since cold heading requires the production of a mold, it will increase the cost for small-batch processing, but cold heading is more efficient and suitable for large-scale processing, so the cost of large-scale production is lower.

[0080] In some embodiments, the sensed member 30 is a magnetic member, and the sensor 40 is a magnetic sensor.

[0081] Specifically, the use of magnetic induction can make the structural design of the entire emergency stop control assembly simpler and more convenient to assemble. In one embodiment, the magnetic member 30 is an annular magnetic member, a through hole is provided on the vertical plate 2333, and the annular magnetic member is arranged at the through hole of the vertical plate 2333 by a threaded fastener 70.

[0082] In a second aspect, the utility model further provides an automatic lawn mower, comprising an emergency stop control assembly as described in any one of the above embodiments.

[0083] The above implementation modes are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various implementation modes of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An emergency stop control assembly for controlling an automatic lawn mower to stop suddenly, the automatic lawn mower comprising a movable wheel, characterized in that: include: Bracket; A suspension assembly is installed on the bracket, the suspension assembly is equipped with a sensed component and is used to enable the sensed component to move in a vertical direction, and the suspension assembly is connected to the movable wheel; A sensor, mounted on the bracket and used to sense the position of the sensed component; The controller is connected to the sensor and is used to control the automatic lawn mower to stop running when the sensor senses that the sensed component has dropped to the lowest position.

2. The emergency stop control assembly according to claim 1, characterized in that: The suspension assembly comprises: a first connecting plate connected to the movable wheel; A guide column, one end of which is connected to the first connecting plate, and the sensed component is installed at one end of the guide column away from the first connecting plate; The support assembly comprises a sliding sleeve and a fixed sleeve, wherein the fixed sleeve is vertically mounted on the bracket, and the sliding sleeve is fixed in the fixed sleeve and slidably sleeved on the guide column.

3. The emergency stop control assembly according to claim 2, characterized in that: The support assembly further comprises a mounting plate, which is mounted on an end of the guide column away from the first connecting plate, and a size of the mounting plate is larger than an inner diameter of the fixing sleeve.

4. The emergency stop control assembly according to claim 3, characterized in that: A stop protrusion is provided on the end face of the fixing sleeve away from the first connecting plate, and a notch adapted to the stop protrusion is opened at the edge of the mounting plate. The stop protrusion is located at the notch, and the height of the stop protrusion is not less than the movable distance of the guide column.

5. The emergency stop control assembly according to claim 3, characterized in that: The mounting plate comprises a bottom plate and a vertical plate perpendicular to the bottom plate. The bottom plate is mounted on the end surface of the guide column away from the first connecting plate, and the sensed component is mounted on the vertical plate.

6. The emergency stop control assembly according to claim 2, characterized in that: The support assembly further comprises a sealing cover and a sealing ring, wherein the sealing cover is arranged on the fixing sleeve; the sealing ring is sleeved on the fixing sleeve and is arranged between the fixing sleeve and the bracket.

7. The emergency stop control assembly according to claim 2, characterized in that: A groove is provided on the first surface of the first connecting plate, a through hole is provided on the bottom surface of the groove, and the first surface of the first connecting plate is connected to the movable wheel; The guide column comprises a guide portion and a connecting portion connected to the guide portion, the cross section of the connecting portion is adapted to the through hole, an end of the connecting portion away from the guide portion is provided with a flange, the connecting portion is provided at the through hole, the flange is located in the groove and contacts the first connecting plate; The sliding sleeve can be slidably mounted on the guide portion.

8. The emergency stop control assembly according to claim 7, characterized in that: The second connecting plate of the movable wheel is connected to the first surface; the flange is sandwiched between the first connecting plate and the second connecting plate, and the thickness of the flange is greater than the depth of the groove.

9. The emergency stop control assembly according to claim 8, characterized in that: The thickness of the flange differs from the depth of the groove by 0.5-1.5 mm; and / or, The side of the flange facing the bottom surface of the groove contacts the bottom surface of the groove to form an annular contact surface, and the width of the annular contact surface is 1-1.5 times the thickness of the flange.

10. The emergency stop control assembly according to any one of claims 1 to 9, characterized in that: The induced part is a magnetic part, and the sensor is a magnetic sensor.

11. An automatic lawn mower, characterized in that: Comprising the emergency stop control component as described in any one of claims 1-10.

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