Universal wheel assembly and lawn mower

Abstract

The embodiment of the utility model provides a kind of universal wheel assembly and mower, it is related to mower technical field.The utility model provides a kind of universal wheel assembly and mower, through being set on the elastic limiting piece of installation shell, the detachable connection between installation component and installation groove is realized;Still through being set on the limiting portion of elastic limiting piece, the effective limiting and fixing of universal wheel assembly and installation groove under installation state are realized, guarantee the normal rotation of universal wheel assembly;The universal wheel assembly thus arranged, without special tool, can realize the disassembly and maintenance between universal wheel assembly and pre-installation component, and the disassembly between the two is more quick and convenient, so that the disassembly efficiency of universal wheel assembly is higher, and replacement maintenance is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of lawnmower technology, and more specifically, to a caster wheel assembly and a lawnmower. Background Technology

[0002] Robots in related technologies all include at least one omnidirectional wheel assembly, which is fixed under the robot's body and performs functions such as steering.

[0003] Because the caster wheel assembly is fixed and is a wear part, it wears out quickly during operation and has a short lifespan. At the same time, the caster wheel assembly cannot be easily disassembled and requires special tools for disassembly and repair. Therefore, the caster wheel assembly has problems such as inconvenience in replacement and repair and difficulty in later maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a caster wheel assembly and a lawnmower that enables quick installation and quick disassembly of the caster wheel assembly.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, this utility model provides a caster wheel assembly, wherein the caster wheel assembly is detachably connected to the mounting groove of a pre-installed component;

[0007] The caster assembly includes a mounting assembly and a wheel system assembly connected to the mounting assembly;

[0008] The mounting assembly includes a mounting housing, which is elastically confined within the mounting groove. An elastic limiting member is provided on the outer wall of the mounting housing. One end of the elastic limiting member is connected to the mounting housing, and the other end extends from a first end to a second end of the mounting housing and is a free end. A limiting portion is provided on the elastic limiting member, and a limiting groove is provided in the mounting groove. The limiting portion is confined within the limiting groove.

[0009] In an optional embodiment, at least two elastic limiting members are provided on the outer wall of the mounting housing, and the at least two elastic limiting members are arranged at equal angles along the center of the mounting housing;

[0010] The limiting groove includes at least two, and the at least two limiting parts are respectively limited within the at least two limiting grooves.

[0011] In an optional embodiment, at least one positioning groove is provided on the outer wall of the mounting housing, the positioning groove penetrating the mounting housing and extending from the first end of the mounting housing to the second end;

[0012] The mounting groove of the pre-installed component is provided with at least one positioning protrusion, which is fitted and limited within the positioning groove.

[0013] In an optional embodiment, a limiting protrusion is provided on the outer wall of the second end of the mounting housing;

[0014] The bottom of the mounting slot of the pre-installed component is provided with a height limiting groove, and the limiting protrusion is fitted and limited within the height limiting groove.

[0015] In optional embodiments, the mounting housing includes at least a cylindrical mounting housing, a frustum-shaped cylindrical mounting housing, a rectangular mounting housing, and a polygonal mounting housing.

[0016] In an optional embodiment, the caster wheel assembly includes a connecting shaft, the wheel train assembly is located at the second end of the mounting assembly, the first end of the connecting shaft passes through the mounting assembly and is rotatably connected to the mounting housing, and the second end of the connecting shaft is drively connected to the wheel train assembly;

[0017] The mounting groove has a mating groove at its top, and the first end of the connecting shaft passes through the mounting assembly and is accommodated in the mating groove.

[0018] In an optional embodiment, the mounting assembly further includes a shaft retainer disposed within the mounting housing. The shaft retainer is fixedly connected to a first end of the connecting shaft. The first end of the connecting shaft is provided with a limiting step. The first end of the shaft retainer faces the inner top wall of the mounting housing, and the second end of the shaft retainer abuts against the limiting step.

[0019] The first end of the connecting shaft is also rotatably connected to the mounting housing.

[0020] In an optional embodiment, the mounting assembly further includes a height limiting member that penetrates the top wall of a first end of the mounting housing, the first end of the height limiting member being connected to the top wall of the mounting groove, and the second end of the height limiting member abutting against the first end of the shaft retainer;

[0021] And / or, a shaft limiting member is fixed on the first end of the connecting shaft.

[0022] In an optional embodiment, the mounting assembly further includes a shaft retainer disposed within the mounting housing, the shaft retainer being fixedly connected to a first end of the connecting shaft, and the first end of the connecting shaft being rotatably connected to the mounting housing;

[0023] The shaft retainer is provided with a magnetic element, and the pre-installed assembly is provided with a Hall sensor. The Hall sensor is located below the magnetic element and is used to sense the magnetic field generated by the magnetic element to determine the working status of the lawnmower.

[0024] Secondly, this utility model provides a lawnmower, including the universal wheel assembly described in any of the foregoing embodiments;

[0025] The pre-installed component includes a lawnmower body, the bottom of which is provided with the mounting groove, and the caster wheel assembly is detachably connected to the mounting groove.

[0026] The beneficial effects of the universal wheel assembly and lawnmower provided in this embodiment of the invention include:

[0027] The elastic limiting component on the mounting housing enables a detachable connection between the mounting assembly and the mounting slot. Furthermore, the limiting part on the elastic limiting component effectively limits and fixes the caster assembly and the mounting slot in the installed state, ensuring the normal rotation of the caster assembly. This design allows for easy disassembly and repair of the caster assembly and pre-installed components without the need for special tools. The disassembly and assembly are also faster and more convenient, resulting in higher efficiency and easier replacement and maintenance of the caster assembly.

[0028] Furthermore, the mounting housing adopts a circular design, which can better control the fitting gap between the mounting housing and the mounting groove, providing effective support for the mounting components. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the omnidirectional wheel assembly provided in this embodiment;

[0031] Figure 2 This is a side view of the caster wheel assembly provided in this embodiment;

[0032] Figure 3 This is a top view of the caster wheel assembly provided in this embodiment;

[0033] Figure 4 A cross-sectional view of the mounting housing provided in this embodiment installed in the mounting slot;

[0034] Figure 5 This is a cross-sectional view of the caster wheel assembly provided in this embodiment from a first-person perspective;

[0035] Figure 6 This is a cross-sectional view of the caster assembly provided in this embodiment assembled inside a lawnmower, viewed from a first perspective.

[0036] Figure 7 This is a cross-sectional view of the caster wheel assembly provided in this embodiment from a second perspective;

[0037] Figure 8 This is a cross-sectional view from a second perspective of the universal wheel assembly provided in this embodiment being assembled inside a lawnmower.

[0038] Icons: 010 - Lawn mower; 011 - Pre-installation component; 012 - Mounting slot; 0121 - Positioning protrusion; 0122 - Height limit slot; 0123 - Receiving slot; 013 - Limiting slot; 014 - Hall effect sensor; 020 - Caster wheel assembly; 100 - Mounting component; 110 - Mounting housing; 111 - Flexible limiting component; 1111 - Free end; 112 - Limiting part; 113 - Positioning 114 - Groove; 120 - Limiting protrusion; 121 - Shaft retainer; 122 - Bracket; 123 - Bushing; 124 - First washer; 125 - Second washer; 125 - Butterfly washer; 130 - Bearing; 140 - Magnetic component; 150 - Height limiting component; 200 - Gear train assembly; 210 - Gear train housing; 220 - Gear train bearing; 300 - Connecting shaft; 310 - Limiting step; 320 - Shaft limiting component. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0044] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0045] The following describes in detail the overall structure, working principle, and technical effects of the universal wheel assembly 020 and lawnmower 010 provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0046] Please refer to Figure 6 and Figure 8 The universal wheel assembly 020 provided by this utility model is applied inside the lawnmower 010 to provide auxiliary support and steering function for the lawnmower 010.

[0047] In some embodiments, the caster wheel assembly 020 can also be installed in the robot, in which case the pre-installation component 011 is the robot body, and the mounting slot 012 is located at the bottom of the robot body. The robot can be a cleaning robot, etc.

[0048] In some embodiments, the caster wheel assembly 020 can also be installed in a transport trolley, in which case the pre-installation component 011 is the trolley body, and the mounting slot 012 is located at the bottom of the trolley body.

[0049] It is understood that the application scenarios of the caster wheel assembly 020 are not limited to the above scenarios, and this application does not limit the application scenarios of the caster wheel assembly 020.

[0050] Please refer to Figure 6 and Figure 8 This utility model provides a lawnmower 010, including a caster wheel assembly 020;

[0051] The pre-installed component 011 includes a lawnmower 010 body, a mounting groove 012 is provided at the bottom of the lawnmower 010 body, and a caster wheel assembly 020 is detachably connected to the mounting groove 012.

[0052] In this embodiment, the lawnmower 010 is equipped with a caster wheel assembly 020, which is located at the front of the lawnmower 010 and is driven by the lawnmower 010 to roll as it moves. Of course, in other embodiments, the lawnmower 010 is equipped with two caster wheel assemblies 020, which are spaced apart and located at the front of the lawnmower 010.

[0053] Please refer to Figure 1 This utility model provides a universal wheel assembly 020, which is detachably connected to the mounting groove 012 of the pre-installation component 011;

[0054] The caster wheel assembly 020 includes a mounting assembly 100 and a wheel system assembly 200 connected to the mounting assembly 100;

[0055] The mounting assembly 100 includes a mounting housing 110, which is elastically confined within a mounting groove 012. An elastic limiting member 111 is provided on the outer wall of the mounting housing 110. One end of the elastic limiting member 111 is connected to the mounting housing 110, and the other end extends from the first end to the second end of the mounting housing 110 and becomes a free end 1111. A limiting part 112 is provided on the elastic limiting member 111, and a limiting groove 013 is provided in the mounting groove 012. The limiting part 112 is confined within the limiting groove 013.

[0056] Understandably, when installing the caster assembly 020, pressing the free end 1111 of the elastic limiting member 111 causes the elastic limiting member 111 to deform in the direction of the mounting housing 110, so that the mounting housing 110 can be inserted into the mounting groove 012. After the mounting housing 110 is inserted into the mounting groove 012, the mounting assembly 100 is pushed along the top wall of the mounting groove 012 until the top wall of the mounting assembly 100 abuts against the top wall of the mounting groove 012. At the same time, the free end 1111 of the elastic limiting member 111 is released, and the free end 1111 of the elastic limiting member 111 automatically and elastically resets, so that the limiting part 112 is limited in the limiting groove 013, thereby realizing the limiting connection between the mounting housing 110 and the mounting groove 012.

[0057] Of course, when removing the caster assembly 020, press the free end 1111 of the elastic limiting member 111 to release the restriction between the limiting part 112 and the limiting groove 013, thereby removing the housing 110 from the mounting groove 012.

[0058] Therefore, the elastic limiting member 111 provided on the mounting housing 110 enables a detachable connection between the mounting component 100 and the mounting groove 012; the limiting part 112 provided on the elastic limiting member 111 effectively limits and fixes the caster assembly 020 and the mounting groove 012 in the installed state, ensuring the normal rotation of the caster assembly 020; the caster assembly 020 configured in this way can be disassembled and repaired from the pre-installed component 011 without special tools, and the disassembly and assembly between the two are faster and more convenient, making the disassembly and assembly of the caster assembly 020 more efficient and the replacement, repair and maintenance more convenient.

[0059] In this embodiment, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 The mounting assembly 100 includes a mounting housing 110; the mounting housing 110 is elastically confined within the mounting groove 012, and an elastic limiting member 111 is provided on the outer wall of the mounting housing 110. One end of the elastic limiting member 111 is connected to the mounting housing 110, and the other end extends from the first end of the mounting housing 110 to the second end and extends to become a free end 1111; a limiting part 112 is provided on the elastic limiting member 111, and a limiting groove 013 is provided in the mounting groove 012, with the limiting part 112 confined within the limiting groove 013.

[0060] The top wall of the mounting slot 012 can limit the extreme positions where the installation can move along the axis.

[0061] Please refer to Figure 6 The mounting housing 110 has an elastic space relative to the elastic limiting member 111. The elastic space is used to provide a certain amount of movement space for the free end 1111 of the elastic limiting member 111 when the limiting part 112 and the limiting groove 013 are released, so as to facilitate the removal of the mounting assembly 100.

[0062] In this embodiment, the mounting housing 110 includes a detachably connected upper housing and a lower housing, with an elastic limiting member 111 disposed on the lower housing. The upper and lower housings can be detachably connected via a snap-fit ​​structure, threaded connection, or other means, further facilitating the disassembly and maintenance of the mounting housing 110 as a whole.

[0063] In this embodiment, please refer to Figures 1-4 The mounting housing 110 is a cylindrical mounting housing 110 with a cylindrical structure. The diameter of the second end of the cylindrical mounting housing 110 is larger than the diameter of the first end of the cylindrical mounting housing 110. At least two elastic limiting members 111 are set at equal angles along the center of the mounting housing 110.

[0064] The mounting housing 110 has a circular shape, and the mating surface between the mounting housing 110 and the mounting groove 012 is an arc-shaped mating surface. The arc-shaped mating surface can better control the mating gap between the mounting housing 110 and the mounting groove 012, providing effective support for the mounting assembly 100.

[0065] Of course, in other embodiments, the mounting housing 110 is a columnar mounting housing 110 with a frustum structure. The diameter of the second end of the columnar mounting housing 110 is equal to the diameter of the first end of the columnar mounting housing 110. At least two elastic limiting members 111 are set at equal angles along the center of the mounting housing 110. The mounting housing 110 adopts a circular design, which can better control the fitting gap between the mounting housing 110 and the mounting groove 012.

[0066] In another embodiment, the mounting housing 110 may also be a rectangular mounting housing 110 with a rectangular structure, in which case the multiple elastic limiting members 111 may be set at opposite ends or opposite four ends of the rectangular mounting housing 110.

[0067] In another embodiment, the mounting housing 110 may also be a polygonal mounting housing 110 with a polygonal structure, in which case a plurality of elastic limiting members 111 may be disposed on opposite ends of the polygonal mounting housing 110.

[0068] In this embodiment, please refer to Figures 3-4 The outer wall of the mounting housing 110 is also provided with at least one positioning groove 113, which penetrates the mounting housing 110 and extends from the first end of the mounting housing 110 to the second end; the mounting groove 012 of the pre-installed component 011 is provided with at least one positioning protrusion 0121, which is fitted and limited within the positioning groove 113.

[0069] Optionally, the positioning groove 113 can be a triangular, arc-shaped, or rectangular groove structure, and the corresponding positioning protrusion 0121 can also be a triangular, arc-shaped, or rectangular structure.

[0070] It is understandable that the positioning groove 113 and positioning protrusion 0121 provided together can restrict the rotational movement of the mounting housing 110 around the axis, so that the mounting housing 110 can only move along the axis; at the same time, the positioning groove 113 is also used for the installation positioning of the mounting component 100, which facilitates the positioning of the mounting component 100 and the mounting groove 012.

[0071] In this embodiment, please refer to Figures 7-8 The second end of the housing 110 is provided with a limiting protrusion 114; the bottom of the mounting groove 012 of the pre-installed component 011 is provided with a height limiting groove 0122, and the limiting protrusion 114 is fitted and limited within the height limiting groove 0122.

[0072] Optionally, the limiting protrusion 114 can be an annular limiting protrusion 114 extending outward from the outer edge of the second end of the mounting housing 110. At least two limiting protrusions 114 are provided on the outer wall of the second end of the mounting housing 110, and these at least two limiting protrusions 114 are angularly arranged along the center of the mounting housing 110. Correspondingly, the height limiting groove 0122 is also an annular height limiting groove 0122 extending outward from the bottom of the mounting groove 012. At least two height limiting grooves 0122 are provided at the bottom of the mounting groove 012, and these at least two height limiting grooves 0122 are angularly arranged along the center of the bottom of the mounting groove 012.

[0073] Understandably, the height limiting groove 0122 is used to limit the installation height of the mounting component 100, and can also restrict the rotation of the mounting housing 110 around the axis.

[0074] In this embodiment, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 The outer wall of the mounting housing 110 is provided with at least two elastic limiting members 111, which are arranged at equal angles along the center of the mounting housing 110; the limiting groove 013 includes at least two, and at least two limiting parts 112 are respectively limited within the at least two limiting grooves 013. The at least two elastic limiting members 111 can achieve optimal limiting.

[0075] Optionally, the number of elastic limiting members 111 can be one, two, three, or four, and the number of limiting grooves 013 can also be one, two, three, or four.

[0076] In this embodiment, please refer to Figure 1 The limiting part 112 on the limiting connector includes a first limiting block and two second limiting blocks. The first limiting block is arranged laterally along the limiting connector, and the two second limiting blocks are located at the first end of the first limiting block facing the mounting housing 110. The two second limiting blocks are spaced apart, and one side wall of the second limiting block is connected to the top side wall of the first limiting block, while the adjacent side wall is connected to the outer side wall of the limiting connector. The limiting part 112 configured in this way is relatively stable.

[0077] In this embodiment, the lower housing of the mounting housing 110, the limiting connector, and the limiting part 112 including the first limiting block and two second limiting blocks are integrally formed structures.

[0078] In this embodiment, please refer to Figure 1The omnidirectional wheel assembly 020 includes a connecting shaft 300, a mounting assembly 100, and a wheel system assembly 200 connected to the mounting assembly 100. The wheel system assembly 200 is located at the second end of the mounting assembly 100, the first end of the connecting shaft 300 passes through the mounting assembly 100 and is rotatably connected to the mounting housing 110, and the second end of the connecting shaft 300 is drive-connected to the wheel system assembly 200.

[0079] The top of the mounting groove 012 is provided with a mating groove, and the first end of the connecting shaft 300 passes through the mounting assembly 100 and is accommodated in the mating groove.

[0080] Optionally, the connecting shaft 300 can be a crankshaft structure. The first end and the second end of the connecting shaft 300 are vertically arranged.

[0081] It is understandable that when the wheel assembly 200 rotates, the wheel assembly 200 drives the connecting shaft 300 to rotate synchronously, and the connecting shaft 300 can rotate relative to the mounting housing 110, so as not to affect the steering function of the universal wheel assembly 020.

[0082] In this embodiment, please refer to Figures 5-8 The mounting assembly 100 also includes a shaft retainer 120, which is disposed within the mounting housing 110 and is fixedly connected to the first end of the connecting shaft 300; the first end of the connecting shaft 300 is also rotatably connected to the mounting housing 110.

[0083] The mounting housing 110 contains a bearing 130, which allows the first end of the connecting shaft 300 to be rotatably connected to the mounting housing 110. It is understood that the connecting shaft 300 is rotatably connected to the mounting assembly 100 via the bearing 130, thus not affecting the steering function of the caster wheel assembly 020.

[0084] In this embodiment, please refer to Figures 5-8 The first end of the connecting shaft 300 is provided with a limiting step 310, the first end of the shaft retainer 120 faces the inner top wall of the mounting housing 110, and the second end of the shaft retainer 120 abuts against the limiting step 310.

[0085] Understandably, the axle retainer 120, with this configuration, serves a supporting function and also limits the rising height of the wheel assembly 200 and the connecting shaft 300. Specifically, when the caster wheel assembly 020 is in operation, the connecting shaft 300 drives the axle retainer 120 to move upward until the axle retainer 120 abuts against the inner top wall of the mounting housing 110, thereby limiting the rising height of the wheel assembly 200 and the connecting shaft 300.

[0086] Alternatively, please refer to Figures 5-8The shaft retainer 120 includes a bracket 121, a bushing 122, a first washer 123, a second washer 124, and a butterfly washer 125. The first end of the bracket 121 has a slot and a mounting opening within the slot. The bushing 122 is disposed within the mounting opening and fitted onto the first end of the connecting shaft 300. The first end of the bracket 121 abuts against the inner top wall of the mounting housing 110, and the second end of the bracket 121 faces the limiting step 310. The first washer 123 is fitted onto the shaft retainer 120 and abuts against the top of the bushing 122; the butterfly washer 125 is fitted onto the shaft retainer 120 and is located above the first washer 123. The second end of the bracket 121 of the shaft retainer 120 has a groove, and the second washer 124 is disposed within the groove and fitted onto the shaft retainer 120. The first washer 123 is positioned between the bushing 122 and the limiting step 310.

[0087] Optionally, the first washer 123 and the second washer 124 can be flat washers.

[0088] Understandably, the shaft retainer 120 secures the bracket 121 to the connecting shaft 300 by providing a bushing 122, a first washer 123, a second washer 124, and a butterfly washer 125. The second washer 124 restricts the relative height movement of the bracket 121.

[0089] In this embodiment, please refer to Figures 7-8 A magnetic element 140 is provided on the shaft retainer 120, and a Hall sensor 014 is provided on the pre-installation assembly 011. The Hall sensor 014 is located below the magnetic element 140 and is used to sense the magnetic field generated by the magnetic element 140 to determine the working status of the lawnmower 010.

[0090] The bracket 121 has a mounting part on its circumferential outer wall, and the magnetic component 140 is disposed in the mounting part.

[0091] Optionally, the Hall sensor 014 can be a Hall sensor, and the magnetic element 140 can be a magnet or armature with magnetism.

[0092] Understandably, the shaft retainer 120, in this configuration, serves a supporting function and can also be used to mount the magnetic component 140, so that the Hall sensor 014 can determine the working status of the lawnmower 010 by sensing the magnetic field generated by the magnetic component 140, and the controller of the lawnmower 010 can determine whether the lawnmower 010 body has been lifted based on the Hall sensor 014.

[0093] When the lawnmower 010 is working normally, when the wheel assembly 200 is subjected to a deflection torque, the connecting shaft 300 drives the shaft retainer 120 to rotate together. At this time, the Hall sensor 014 cannot sense the magnetic flux signal of the magnetic component 140, and it is determined that the lawnmower 010 is in normal working condition.

[0094] When the lawnmower 010 is lifted, under the gravity of the wheel assembly 200, the wheel assembly 200 will drive the connecting shaft 300 and the shaft retainer 120 to move downwards together. As the distance between the magnetic component 140 and the Hall sensor 014 continuously decreases until the distance reaches a certain range, the Hall sensor 014 can sense the magnetic flux signal of the magnetic component 140, thereby determining that the lawnmower 010 is in a lifted state. Furthermore, when the lawnmower 010 is in a lifted state, the lawnmower 010 will perform corresponding operations.

[0095] In this embodiment, please refer to Figures 1-8 A shaft limiting member 320 is fixed to the first end of the connecting shaft 300; wherein, the shaft limiting member 320 is used to limit the connection with the top wall of the mounting housing 110, restricting the downward movement of the connecting shaft 300. Furthermore, the top of the mounting groove 012 is also provided with a receiving groove 0123 to accommodate the extended connecting shaft 300 and the shaft limiting member 320, and the receiving groove 0123 is used to accommodate the up and down movement of the first end of the connecting shaft 300 during operation.

[0096] Optionally, the shaft limiting member 320 can be a flat washer, which is fixed to the first end position of the connecting shaft 300 by screws or other connecting parts.

[0097] Understandably, when the lawnmower 010 is lifted, the wheel assembly 200 will drive the connecting shaft 300 and the shaft retainer 120 to move downward together. When the connecting shaft 300 falls to the point where the shaft limiter 320 contacts the top wall of the mounting housing 110, the shaft limiter 320 will restrict the wheel assembly 200 and prevent the wheel assembly 200 from continuing to fall and move.

[0098] In this embodiment, please refer to Figures 5-8 The mounting assembly 100 also includes a height limiting member 150, which penetrates the top wall of the first end of the mounting housing 110. The first end of the height limiting member 150 is connected to the top wall of the mounting groove 012, and the second end of the height limiting member 150 abuts against the first end of the shaft retainer 120.

[0099] Optionally, the height limiting component 150 is made of rubber.

[0100] Understandably, when the lawnmower 010 is working normally, the first end of the shaft limiting member 320 will always be in contact with the second end of the height limiting member 150, thereby limiting the rising height of the shaft retaining member 120.

[0101] In summary, the mounting assembly 100, which includes a mounting housing 110, a shaft retainer 120, a magnetic component 140, and a Hall sensor 014 in the above embodiments, can ensure the basic rotational support function of the caster wheel assembly 020, while also enabling the lifting detection function of the caster wheel assembly 020 and noise reduction of the overall mechanism.

[0102] In this embodiment, please refer to Figures 1-8 The gear train assembly 200 includes a gear train housing 210 and a gear train bearing 220. The second end of the connecting shaft 300 is limited and connected inside the gear train housing 210. The second end of the connecting shaft 300 is transversely connected to the gear train housing 210 and is connected to the gear train housing 210 through two spaced gear train bearings 220. The gear train bearings 220 are sleeved on the connecting shaft 300 and limited inside the gear train housing 210.

[0103] The second end of the connecting shaft 300 extends laterally through the gear train housing 210 and abuts against the right end cap of the gear train housing 210. A protrusion is provided at the second end of the connecting shaft 300 located outside the gear train housing 210, and this protrusion abuts against the left end cap of the gear train housing 210. This is understood to achieve a limiting connection between the second end of the connecting shaft 300 and the gear train housing 210.

[0104] The disassembly process of the caster wheel assembly 020 and lawnmower 010 provided in this embodiment of the present invention is as follows: When installing the caster wheel assembly 020, align the positioning groove 113 on the mounting housing 110 with the positioning protrusion 0121 in the mounting groove 012. At the same time, the operator presses the free end 1111 of the elastic limiting member 111, causing the elastic limiting member 111 to deform towards the mounting housing 110, thus inserting the mounting housing 110 into the mounting groove 012. Push the mounting component 100 along the top wall of the mounting groove 012 until the top wall of the mounting component 100 abuts against the top wall of the mounting groove 012. Simultaneously, release the free end 1111 of the elastic limiting member 111. The free end 1111 of the elastic limiting member 111 automatically and elastically resets, causing the limiting part 112 to engage with the limiting groove 013. The installation of the caster wheel assembly 020 and the lawnmower 010 is complete.

[0105] When removing the caster wheel assembly 020, the operator presses the free end 1111 of the elastic limiting member 111 to release the restriction between the limiting part 112 and the limiting groove 013, and removes the mounting housing 110 along the mounting groove 012, thereby removing the mounting housing 110 from the mounting groove 012. The removal of the caster wheel assembly 020 and the lawnmower 010 is then complete.

[0106] The working principle of the universal wheel assembly 020 and lawnmower 010 provided in this embodiment of the utility model is as follows:

[0107] When the lawnmower 010 is operating normally, when the wheel assembly 200 is subjected to a deflection torque, the connecting shaft 300 drives the shaft retainer 120 to rotate together. At this time, the Hall sensor 014 does not detect the magnetic flux signal of the magnetic component 140, thus determining that the lawnmower 010 is in normal operating condition. Furthermore, when the lawnmower 010 is in normal operating condition, it will perform corresponding operations, such as mowing.

[0108] When the lawnmower 010 is lifted, under the gravity of the wheel assembly 200, the wheel assembly 200 will drive the connecting shaft 300 and the shaft retainer 120 to move downwards together. As the distance between the magnetic component 140 and the Hall sensor 014 continuously decreases until the distance reaches a certain range, the Hall sensor 014 can sense the magnetic flux signal of the magnetic component 140, thereby determining that the lawnmower 010 is in a lifted state. Furthermore, when the lawnmower 010 is in a lifted state, the lawnmower 010 will perform corresponding operations, such as stopping the mowing action.

[0109] In summary, the universal wheel assembly 020 and lawnmower 010 provided in this embodiment of the present invention achieve a detachable connection between the mounting component 100 and the mounting groove 012 through the elastic limiting member 111 provided on the mounting housing 110; and through the limiting part 112 provided on the elastic limiting member 111, the universal wheel assembly 020 and the mounting groove 012 are effectively limited and fixed in the installed state, ensuring the normal rotation of the universal wheel assembly 020. The universal wheel assembly 020 with this configuration can be disassembled and repaired from the pre-installed component 011 without special tools, and the disassembly and assembly between the two are faster and more convenient, making the disassembly and assembly of the universal wheel assembly 020 more efficient and the replacement, repair and maintenance of the universal wheel assembly 020 more convenient.

[0110] Furthermore, the mounting housing 110 adopts a circular design, which can better control the fitting gap between the mounting housing 110 and the mounting groove 012.

[0111] Furthermore, on the one hand, by setting the limiting protrusion 114 and the height limiting groove 0122 that are configured to cooperate, as well as the positioning groove 113 and the positioning protrusion 0121 that are configured to cooperate, the rotational movement of the mounting housing 110 around the axis is restricted, so that the mounting housing 110 can only move along the axis. On the other hand, the top wall of the mounting groove 012 can limit the extreme position where the installation can move along the axis.

[0112] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A universal wheel assembly, characterized in that, The caster wheel assembly is detachably connected to the mounting slot of the pre-installed component; The caster assembly includes a mounting assembly and a wheel system assembly connected to the mounting assembly; The mounting assembly includes a mounting housing, which is elastically confined within the mounting groove. An elastic limiting member is provided on the outer wall of the mounting housing. One end of the elastic limiting member is connected to the mounting housing, and the other end extends from a first end to a second end of the mounting housing and is a free end. A limiting portion is provided on the elastic limiting member, and a limiting groove is provided in the mounting groove. The limiting portion is confined within the limiting groove.

2. The universal wheel assembly according to claim 1, characterized in that, At least two elastic limiting members are provided on the outer wall of the mounting housing, and the at least two elastic limiting members are arranged at equal angles along the center of the mounting housing; The limiting groove includes at least two, and the at least two limiting parts are respectively limited within the at least two limiting grooves.

3. The universal wheel assembly according to claim 1, characterized in that, The outer wall of the mounting housing is also provided with at least one positioning groove, which penetrates the mounting housing and extends from the first end of the mounting housing to the second end. The mounting groove of the pre-installed component is provided with at least one positioning protrusion, which is fitted and limited within the positioning groove.

4. The universal wheel assembly according to claim 1, characterized in that, A limiting protrusion is provided on the outer wall of the second end of the mounting housing; The bottom of the mounting slot of the pre-installed component is provided with a height limiting groove, and the limiting protrusion is fitted and limited within the height limiting groove.

5. The universal wheel assembly according to claim 1, characterized in that, The mounting housing includes at least a cylindrical mounting housing, a frustum-shaped cylindrical mounting housing, a rectangular mounting housing, and a polygonal mounting housing.

6. The universal wheel assembly according to claim 1, characterized in that, The universal wheel assembly includes a connecting shaft, the wheel system assembly is located at the second end of the mounting assembly, the first end of the connecting shaft passes through the mounting assembly and is rotatably connected to the mounting housing, and the second end of the connecting shaft is drive-connected to the wheel system assembly; The mounting groove has a mating groove at its top, and the first end of the connecting shaft passes through the mounting assembly and is accommodated in the mating groove.

7. The universal wheel assembly according to claim 6, characterized in that, The mounting assembly further includes a shaft retainer disposed within the mounting housing. The shaft retainer is fixedly connected to a first end of the connecting shaft. The first end of the connecting shaft is provided with a limiting step. The first end of the shaft retainer faces the inner top wall of the mounting housing, and the second end of the shaft retainer abuts against the limiting step. The first end of the connecting shaft is also rotatably connected to the mounting housing.

8. The universal wheel assembly according to claim 7, characterized in that, The mounting assembly further includes a height limiting member that penetrates the top wall of the first end of the mounting housing, the first end of the height limiting member being connected to the top wall of the mounting groove, and the second end of the height limiting member abutting against the first end of the shaft retainer; And / or, a shaft limiting member is fixed on the first end of the connecting shaft.

9. The universal wheel assembly according to claim 6, characterized in that, The mounting assembly further includes a shaft retainer disposed within the mounting housing. The shaft retainer is fixedly connected to a first end of the connecting shaft, and the first end of the connecting shaft is also rotatably connected to the mounting housing. The shaft retainer is provided with a magnetic element, and the pre-installed assembly is provided with a Hall sensor. The Hall sensor is located below the magnetic element and is used to sense the magnetic field generated by the magnetic element to determine the working status of the lawnmower.

10. A lawnmower, characterized in that, Includes the caster wheel assembly as described in any one of claims 1-9; The pre-installed component includes a lawnmower body, the bottom of which is provided with the mounting groove, and the caster wheel assembly is detachably connected to the mounting groove.

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