Universal wheel lifting assembly of sweeper and sweeper

Abstract

The utility model provides a universal wheel lifting assembly of a sweeper and the sweeper. The universal wheel lifting assembly comprises a support and a lifting assembly, the universal wheel mechanism is elastically connected with the support, and the universal wheel mechanism has an extending state and a retracting state; the driving mechanism is in transmission connection with the universal wheel mechanism and can be switched between a linkage mode and a non-linkage mode; in the linkage mode, the driving mechanism is linked with the universal wheel mechanism, so that the universal wheel mechanism is driven to be switched from a retraction state to an extension state; in the non-linkage mode, linkage between the driving mechanism and the universal wheel mechanism is relieved, and therefore the universal wheel mechanism is switched from the extending state to the retracting state. Through the arrangement, when the driving mechanism is in the linkage mode, the driving mechanism can drive the universal wheel mechanism to be switched from the retraction state to the extension state; when the driving mechanism is in the non-linkage mode, the driving mechanism and the universal wheel mechanism are relatively free, the universal wheel mechanism can rapidly recover to the retraction state, and rapid lifting motion of the sweeper is achieved.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a universal wheel lifting assembly for a sweeper and the sweeper itself. Background Technology

[0002] Currently, sweeping machines are being used in an increasingly wide range of fields, bringing great convenience to people's lives and work.

[0003] Because the cleaning area may contain tall obstacles, the sweeper may become difficult to cross due to its own height limitations during its movement. This can cause the sweeper to get stuck in a certain area and be unable to move forward, affecting its normal use.

[0004] In related technologies, some sweeping machines have a lifting function, but after the sweeping machine rises relative to the ground, it is difficult to quickly return to the initial height, and it is easy to get stuck at higher obstacles, which affects the sweeping machine's cleaning efficiency. Utility Model Content

[0005] In view of this, this application provides a universal wheel lifting assembly for a sweeping machine and a sweeping machine, which enables the sweeping machine to quickly achieve lifting and lowering movements.

[0006] Specifically, the following technical solutions are included:

[0007] In a first aspect, this application provides a universal wheel lifting assembly for a sweeping robot, the universal wheel lifting assembly comprising:

[0008] The bracket is designed for connection to the casing of the sweeper.

[0009] The universal wheel mechanism is elastically connected to the bracket. The universal wheel mechanism has an extended state and a retracted state. The distance between the grounding end of the universal wheel mechanism and the bracket in the extended state is greater than the distance in the retracted state.

[0010] A drive mechanism is connected to the universal wheel mechanism, and the drive mechanism can switch between a linkage mode and a non-linkage mode. In the linkage mode, the drive mechanism is linked with the universal wheel mechanism, thereby driving the universal wheel mechanism to switch from the retracted state to the extended state. In the non-linkage mode, the drive mechanism is delinked from the universal wheel mechanism, thereby causing the universal wheel mechanism to switch from the extended state to the retracted state.

[0011] In an optional embodiment, the drive mechanism is provided with an adjusting member, which has a fixed state and a free state; in the fixed state, the drive mechanism is in the linkage mode; in the free state, the drive mechanism is in the non-linkage mode.

[0012] The universal wheel lifting assembly also includes a switching component, which can engage and disengage with the adjusting component, thereby allowing the adjusting component to switch between the fixed state and the free state.

[0013] In an optional embodiment, the drive mechanism includes a drive member and a reducer that are connected by transmission. The reducer includes a sun gear, a planet carrier, and a plurality of planetary gears. The sun gear is connected to the drive member, the planet carrier is connected by transmission to the universal wheel mechanism, and the plurality of planetary gears are mounted on the planet carrier and mesh with the sun gear respectively.

[0014] The adjusting member is a gear ring and is coaxially arranged with the sun gear and the planet carrier respectively. The adjusting member has an internal tooth portion and an external tooth portion. The internal tooth portion meshes with a plurality of planet gears respectively, and the external tooth portion is used to cooperate with the switching member.

[0015] In an optional embodiment, the external teeth are ratchet-shaped, and the switching element is pawl-shaped.

[0016] In an optional embodiment, the switching member and the external toothed portion are configured to allow the adjusting member to rotate in a first rotational direction and prevent the adjusting member from rotating in a second rotational direction; wherein, when the driving member drives the caster mechanism to switch from the retracted state to the extended state, the rotation direction of the sun gear is the first rotational direction, and the second rotational direction is opposite to the first rotational direction.

[0017] In an optional embodiment, the universal wheel lifting assembly further includes a transmission mechanism, which includes a first transmission member and a second transmission member that are connected by transmission. The first transmission member is connected to the planetary carrier, and the second transmission member is connected to the universal wheel mechanism. The second transmission member is capable of moving along a first direction Z under the drive of the first transmission member.

[0018] In an optional embodiment, the first transmission member has a first toothed surface and the second transmission member has a second toothed surface extending along the first direction Z, the first toothed surface and the second toothed surface meshing with each other.

[0019] In an optional embodiment, the caster wheel lifting assembly further includes an elastic element, the caster wheel mechanism includes a connected caster wheel body and a connecting shaft, the connecting shaft extends along the first direction Z, the connecting shaft is movably inserted through the bracket, and the elastic element is sleeved on the outer periphery of the connecting shaft.

[0020] In an optional embodiment, the first end of the second transmission member is connected to the end of the connecting shaft;

[0021] When the caster wheel mechanism is in the extended state, the second end of the second transmission member is used to abut against the bracket.

[0022] In an optional embodiment, the switching element is provided with a pivot and a torsion spring, the switching element being rotatable about the center line of the pivot, and the torsion spring being arranged around the pivot.

[0023] Secondly, this application provides a sweeping machine, which includes a housing and a universal wheel lifting assembly provided in any embodiment of the first aspect, wherein the bracket of the universal wheel lifting assembly is connected to the housing.

[0024] In an optional embodiment, the sweeper further includes a bumper assembly;

[0025] The drive mechanism of the universal wheel lifting assembly is equipped with an adjusting component, which has a fixed state and a free state; in the fixed state, the drive mechanism is in the linkage mode; in the free state, the drive mechanism is in the non-linkage mode.

[0026] The universal wheel lifting assembly also includes a switching component, which can engage and disengage with the adjusting component, thereby allowing the adjusting component to switch between the fixed state and the free state.

[0027] The switching component is equipped with a rotating shaft and a torsion spring. The switching component can rotate around the center line of the rotating shaft. The first end of the torsion spring is connected to the switching component, and the other end is connected to the impact plate assembly.

[0028] The beneficial effects of the technical solution provided in this application embodiment include at least the following: when the drive mechanism is in the linkage mode, the drive mechanism can transmit power to the universal wheel mechanism, causing the universal wheel mechanism to switch from the retracted state to the extended state, so that the universal wheel mechanism extends relative to the bracket and the casing of the sweeper, raising the casing of the sweeper; when the drive mechanism is in the non-linkage mode, the drive mechanism and the universal wheel mechanism are relatively free. Since the universal wheel mechanism is elastically connected to the bracket, the universal wheel mechanism can quickly return to the retracted state, causing the casing of the sweeper to descend to the initial position, thereby realizing the rapid lifting and lowering movement of the sweeper. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1This is a schematic diagram of the structure of the universal wheel lifting assembly provided in the embodiments of this application;

[0031] Figure 2 An exploded view of the caster wheel lifting assembly provided in an embodiment of this application;

[0032] Figure 3 A schematic diagram of the universal wheel lifting assembly provided in this application embodiment when the universal wheel mechanism is in the extended state;

[0033] Figure 4 This is a schematic diagram of the universal wheel lifting assembly provided in the embodiment of this application when the universal wheel mechanism is in the retracted state;

[0034] Figure 5 A perspective view of the universal wheel lifting assembly provided in an embodiment of this application;

[0035] Figure 6 This is a schematic diagram of the reducer provided in an embodiment of this application;

[0036] Figure 7 This is a schematic diagram illustrating the cooperation between the omnidirectional wheel lifting assembly and the impact plate assembly provided in an embodiment of this application.

[0037] The reference numerals in the figure indicate:

[0038] 1-Staff;

[0039] 2-Swivel wheel mechanism; 21-Swivel wheel body; 211-Swivel wheel housing; 2111-Mounting part; 212-Roller component; 22-Connecting shaft;

[0040] 3-Elastic element;

[0041] 4-Drive mechanism; 41-Drive component; 42-Reducer; 421-Adjusting component; 4211-Internal gear; 4212-External gear; 422-Sun gear; 423-Planet carrier; 424-Planet gear;

[0042] 5-Switching component; 51-Rotating shaft;

[0043] 6-Transmission mechanism; 61-First transmission component; 611-First toothed surface; 62-Second transmission component; 621-Second toothed surface;

[0044] 100 - Impact plate assembly; 101 - Impact plate linkage; 102 - Rocker arm.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] The directional terms used in the embodiments of this application, such as "up," "down," and "side," are generally based on the relative relationships shown in the figures. These directional terms are used merely to more clearly describe the relationships between structures, not to describe absolute directions. When the product is placed in different orientations, the orientation may change; for example, "up" and "down" may be interchanged.

[0048] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0049] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0050] like Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a universal wheel lifting assembly for a sweeping machine, including a bracket 1, a universal wheel mechanism 2, a drive mechanism 4, and a switching component 5.

[0051] The bracket 1 is adapted to be connected to the housing of the sweeper. Specifically, the bracket 1 is fixedly connected to the chassis area of ​​the sweeper housing.

[0052] The caster wheel mechanism 2 and the bracket 1 are elastically connected. The caster wheel mechanism 2 has an extended state and a retracted state. The distance between the ground end of the caster wheel mechanism 2 and the bracket 1 in the extended state is greater than the distance in the retracted state. Specifically, the caster wheel mechanism 2 can move relative to the bracket 1, thereby switching between the extended state and the retracted state.

[0053] It is understandable that, such as Figure 3 As shown, when the omnidirectional wheel mechanism 2 is in the extended state, the distance between the omnidirectional wheel mechanism 2 and the bracket 1 is relatively large, and the omnidirectional wheel mechanism 2 is relatively far away from the bracket 1. At this time, the distance between the sweeper's casing and the ground is large, making it easier to avoid high obstacles on the ground, so as to prevent obstacles from scratching the chassis or hindering movement; for example Figure 4 As shown, when the universal wheel mechanism 2 is in the retracted state, the distance between the universal wheel mechanism 2 and the bracket 1 is small, and the universal wheel mechanism 2 is relatively close to the bracket 1. At this time, the distance between the casing of the sweeper and the ground is small.

[0054] The universal wheel mechanism 2 is used to realize the movement function of the sweeper. The universal wheel mechanism 2 can rotate 360° relative to the machine casing, flexibly adjusting the movement direction of the sweeper.

[0055] The drive mechanism 4 is connected to the caster wheel mechanism 2 via a transmission, and the drive mechanism 4 can switch between a linkage mode and a non-linkage mode. In the linkage mode, the drive mechanism 4 is linked with the caster wheel mechanism 2, thereby driving the caster wheel mechanism 2 from the retracted state to the extended state; in the non-linkage mode, the drive mechanism 4 is dislinked from the caster wheel mechanism 2, thereby driving the caster wheel mechanism 2 from the extended state to the retracted state.

[0056] For example, the drive mechanism 4 is installed in the housing of the sweeper.

[0057] Specifically, when the drive mechanism 4 is in the linkage mode, the drive mechanism 4 and the universal wheel mechanism 2 form a power transmission path, and the drive mechanism 4 drives the universal wheel mechanism 2 to move, so that the universal wheel mechanism 2 switches from the retracted state to the extended state.

[0058] When the drive mechanism 4 is in the non-linkage mode, the universal wheel mechanism 2 is not constrained by the drive mechanism 4, and the linkage between the drive mechanism 4 and the universal wheel mechanism 2 is released. Since the universal wheel mechanism 2 and the bracket 1 are elastically connected, the universal wheel mechanism 2 can return to the retracted state under the action of elastic force.

[0059] Optionally, the drive mechanism 4 is electrically or communicatively connected to the sensor of the sweeper. Based on the signal sent by the sensor, the drive mechanism 4 flexibly switches between a linkage mode and a non-linkage mode. The sensor is used to detect the height of obstacles around the sweeper. When the sensor detects that the height of an obstacle is higher than a preset height, it sends a signal to the drive mechanism 4. After receiving the signal, the drive mechanism 4 drives the omnidirectional wheel mechanism 2 to switch from the retracted state to the extended state.

[0060] The universal wheel lifting assembly provided in this application embodiment allows the drive mechanism 4 to transmit power to the universal wheel mechanism 2 when the drive mechanism 4 is in the linkage mode, causing the universal wheel mechanism 2 to switch from the retracted state to the extended state, so that the universal wheel mechanism 2 extends relative to the bracket 1 and the sweeper's casing, raising the sweeper's casing. When the drive mechanism 4 is in the non-linkage mode, the drive mechanism 4 and the universal wheel mechanism 2 are relatively free. Since the universal wheel mechanism 2 is elastically connected to the bracket 1, the universal wheel mechanism 2 can quickly return to the retracted state, causing the sweeper's casing to descend to the initial position, thereby realizing the sweeper's rapid lifting movement.

[0061] In a further embodiment, the drive mechanism 4 is provided with an adjusting member 421, which has a fixed state and a free state.

[0062] In the fixed state, the adjusting member 421 is fixed, the driving mechanism 4 is in the linkage mode, the driving mechanism 4 is linked with the universal wheel mechanism 2, and the driving mechanism 4 can drive the universal wheel mechanism 2 from the retracted state to the extended state; in the free state, the adjusting member 421 can move, the driving mechanism 4 is in the non-linkage mode, the driving mechanism 4 is delinked from the universal wheel mechanism 2, and the universal wheel mechanism 2 can switch from the extended state to the retracted state.

[0063] The universal wheel lifting assembly also includes a switching element 5, which can engage and disengage with the adjusting element 421, thereby allowing the adjusting element 421 to switch between a fixed state and a free state.

[0064] Specifically, when the switching member 5 engages with the adjusting member 421, the adjusting member 421 is in a fixed state. At this time, the driving mechanism 4 and the roller mechanism 2 form a power transmission path. The driving mechanism 4 drives the roller mechanism 2 to move, so that the roller mechanism 2 switches from the retracted state to the extended state.

[0065] When the switching element 5 is separated from the adjusting element 421, the adjusting element 421 is in a free state. At this time, the roller mechanism 2 is not constrained by the driving mechanism 4, the linkage between the driving mechanism 4 and the roller mechanism 2 is released, and the roller mechanism 2 can return to the retracted state.

[0066] The switching component 5 is movably installed in the casing of the sweeper, and its movement enables it to engage and disengage with the adjusting component 421.

[0067] Optionally, the switching element 5 is connected to the collision plate assembly 100 of the sweeper, which is used to detect obstacles through physical collision; or, the switching element 5 is electrically / communicationally connected to the sensor of the sweeper, and changes the connection state between the switching element 5 and the adjusting element 421 according to the signal sent by the sensor.

[0068] In one embodiment, such as Figure 6 As shown, the drive mechanism 4 includes a drive member 41 and a reducer 42 connected by transmission. The reducer 42 includes a sun gear 422, a planet carrier 423 and a plurality of planetary gears 424. The sun gear 422 is connected to the drive member 41, and the planet carrier 423 is connected by transmission to the universal wheel mechanism 2. The plurality of planetary gears 424 are mounted on the planet carrier 423 and mesh with the sun gear 422 respectively. The adjusting member 421 is a gear ring and is coaxially arranged with the sun gear 422 and the planet carrier 423 respectively. The adjusting member 421 has an internal tooth portion 4211 and an external tooth portion 4212. The internal tooth portion 4211 meshes with the plurality of planetary gears 424 respectively, and the external tooth portion 4212 is used to cooperate with the switching member 5.

[0069] For example, the drive unit 41 is a motor, and the output shaft of the drive unit 41 is coaxially connected to the sun gear 422.

[0070] In this embodiment, the reducer 42 is a planetary gear reducer. When the adjusting member 421 is in a fixed state, the power transmission path of the reducer 42 is as follows: the adjusting member 421 is braked, and power is input from the sun gear 422—the planetary gear 424 rotates and revolves around the sun gear 422 along the internal tooth portion 4211—the planet carrier 423 rotates and outputs power.

[0071] In this embodiment, when the adjusting member 421 is in a fixed state, the adjusting member 421 participates in the power transmission path as the gear ring in the planetary gear reducer, so that the driving member 41 and the universal wheel mechanism 2 are linked, and the universal wheel mechanism 2 is switched to the extended state; when the adjusting member 421 is in a free state, the transmission relationship in the planetary gear reducer changes, and the universal wheel mechanism 2 can move without the driving member 41 being stationary, thereby switching from the extended state to the retracted state.

[0072] In a further embodiment, the external tooth 4212 is ratchet-shaped, and the switching member 5 is pawl-shaped.

[0073] like Figure 5 As shown, the extension direction of the external tooth 4212 from the tooth root to the tooth tip is inclined to the axial direction of the adjusting member 421. The external tooth 4212 and the switching member 5 are engaged by a ratchet-pawl structure, which can effectively prevent the adjusting member 421 from reversing in the fixed state and causing the universal wheel mechanism 2 to retract.

[0074] Furthermore, the switching member 5 and the external toothed portion 4212 are configured to allow the adjusting member 421 to rotate in a first rotational direction and prevent the adjusting member 421 from rotating in a second rotational direction. Specifically, when the driving member 41 drives the caster mechanism 2 from a retracted state to an extended state, the sun gear 422 rotates in the first rotational direction, and the second rotational direction is opposite to the first rotational direction.

[0075] like Figure 3 and Figure 4 As shown, when the drive member 41 drives the universal wheel mechanism 2 from the retracted state to the extended state, the rotation direction of the first transmission member 61 is counterclockwise. The output shaft of the drive member 41 and the sun gear 422 rotate counterclockwise. The planetary gear 424 meshing with the sun gear 422 has a tendency to rotate clockwise. The adjusting member 421 meshing with the planetary gear 424 through the internal tooth part 4211 also has a tendency to rotate clockwise. At this time, the first rotation direction is counterclockwise and the second rotation direction is clockwise. By preventing the adjusting member 421 from rotating in the second rotation direction, the adjusting member 421 is kept in a fixed state, preventing the adjusting member 421 from reversing during the drive process of the drive member 41 and causing the universal wheel mechanism 2 to retract.

[0076] In a further embodiment, such as Figure 2As shown, the universal wheel lifting assembly also includes a transmission mechanism 6. The transmission mechanism 6 includes a first transmission component 61 and a second transmission component 62 that are connected by transmission. The first transmission component 61 is connected to the planetary carrier 423, and the second transmission component 62 is connected to the universal wheel mechanism 2. The second transmission component 62 can move along the first direction Z under the drive of the first transmission component 61.

[0077] Specifically, in this embodiment, when the adjusting member 421 is in a fixed state, the power transmission path of the universal wheel lifting assembly is: drive member 41—reducer 42—first transmission member 61—second transmission member 62—universal wheel mechanism 2. For example... Figure 3 and Figure 4 As shown, the first direction Z is the vertical direction.

[0078] For example, the first transmission member 61 is a rotary motion member and the second transmission member 62 is a linear motion member. Through the transmission connection between the first transmission member 61 and the second transmission member 62, the rotary motion of the drive member 41 is converted into the linear motion of the universal wheel mechanism 2.

[0079] Furthermore, the first transmission member 61 has a first toothed surface 611, and the second transmission member 62 has a second toothed surface 621 extending along the first direction Z, and the first toothed surface 611 and the second toothed surface 621 mesh with each other.

[0080] like Figure 3 and Figure 4 As shown, the first transmission component 61 is a gear, and the first tooth surface 611 is continuously distributed around the central axis of the first transmission component 61. The second transmission component 62 is a rack, and the second tooth surface 621 extends along the length direction (i.e., the first direction Z) of the second transmission component 62.

[0081] In this embodiment, the first transmission member 61 and the second transmission member 62 constitute a gear and rack transmission structure, which converts the rotational motion of the drive member 41 into the linear motion of the universal wheel mechanism 2, and has the advantages of large power transmission, high transmission efficiency and compact structure.

[0082] In one embodiment, such as Figure 3 and Figure 4 As shown, the universal wheel lifting assembly also includes an elastic element 3. The universal wheel mechanism 2 includes a connected universal wheel body 21 and a connecting shaft 22. The connecting shaft 22 extends along the first direction Z and is movably inserted through the bracket 1. The elastic element 3 is sleeved on the outer periphery of the connecting shaft 22.

[0083] Specifically, the elastic element 3 can be a spring or other element with elastic deformation capability. In both the extended and retracted states of the universal wheel mechanism 2, the elastic element 3 is compressed, and the amount of compression of the elastic element 3 in the extended state of the universal wheel mechanism 2 is greater than the amount of compression in the retracted state of the universal wheel mechanism 2, thereby providing power for the universal wheel mechanism 2 to return from the extended state to the retracted state.

[0084] like Figure 2 As shown, the bracket 1 is roughly disc-shaped. A through hole is provided on the bracket 1, and a rod-shaped connecting shaft 22 passes through the through hole on the bracket 1. The connecting shaft 22 can move relative to the bracket 1 along a first direction Z. Furthermore, the connecting shaft 22 can rotate relative to the bracket 1 around its own central axis, thereby enabling the 360° rotation function of the universal wheel body 21.

[0085] like Figure 3 As shown, the caster wheel body 21 includes a caster wheel housing 211 and a roller component 212. A mounting portion 2111 is provided inside the caster wheel housing 211, and one end of the connecting shaft 22 is fixed to the mounting portion 2111. Figure 4 As shown, when the caster wheel mechanism 2 is in the retracted state, the bracket 1 abuts against the mounting part 2111, limiting the extreme position of the caster wheel mechanism 2 in the retracted state.

[0086] Furthermore, the first end of the second transmission member 62 is connected to the end of the connecting shaft 22, and when the universal wheel mechanism 2 is in the extended state, the second end of the second transmission member 62 is used to abut against the bracket 1.

[0087] like Figure 3 As shown, the upper end of the second transmission member 62 is the first end, and the lower end of the second transmission member 62 is the second end. The first end of the second transmission member 62 is rotatably connected to the connecting shaft 22, the connecting shaft 22 is rotatable relative to the second transmission member 62, and the connecting shaft 22 and the second transmission member 62 are able to move synchronously along the first direction Z.

[0088] like Figure 3 As shown, when the universal wheel mechanism 2 is in the extended state, the second end of the second transmission member 62 abuts against the bracket 1, limiting the extreme position of the universal wheel mechanism 2 in the extended state.

[0089] In one embodiment, the switching element 5 is provided with a rotating shaft 51 and a torsion spring (not shown in the figure). The switching element 5 is rotatable about the center line of the rotating shaft 51, and the torsion spring is arranged around the rotating shaft 51.

[0090] When the omnidirectional wheel mechanism 2 is extended, the switching member 5 remains engaged with the adjusting member 421 under the action of the torsion spring. When the sweeper's impact plate assembly 100 collides with a high obstacle, the impact plate assembly 100 drives the switching member 5 to rotate, thereby separating the switching member 5 from the adjusting member 421, disengaging the drive member 41 from the omnidirectional wheel mechanism 2, and causing the omnidirectional wheel mechanism 2 to switch to the retracted state under the action of the elastic member 3. Subsequently, the switching member 5 resets under the action of the torsion spring and re-engages with the adjusting member 421, maintaining the linkage between the drive member 41 and the omnidirectional wheel mechanism 2.

[0091] For example, such as Figure 7 As shown, the impact plate assembly 100 includes a connected impact plate link 101 and a rocker arm 102. The impact plate link 101 is rotatably connected to the housing of the sweeper, and the rocker arm 102 is fixed to the impact plate link 101. When the impact plate assembly 100 collides with an obstacle at a height, the impact plate link 101 rotates around its own central axis, causing the rocker arm 102 to rotate synchronously. The rocker arm 102 then actuates one end of the switching element 5, thereby separating the switching element 5 from the adjusting element 421.

[0092] This application also provides a sweeping machine, which includes a housing and a universal wheel lifting assembly provided in any of the above embodiments. The bracket 1 of the universal wheel lifting assembly is connected to the housing.

[0093] Furthermore, the sweeper also includes a bumper assembly 100, and the drive mechanism 4 of the omnidirectional wheel lifting assembly is provided with an adjusting member 421, which has a fixed state and a free state. In the fixed state, the drive mechanism 4 is in the linkage mode; in the free state, the drive mechanism 4 is in the non-linkage mode.

[0094] The caster wheel lifting assembly also includes a switching element 5, which can engage and disengage with the adjusting element 421, thereby allowing the adjusting element 421 to switch between a fixed state and a free state. The switching element 5 of the caster wheel lifting assembly is provided with a rotating shaft 51 and a torsion spring. The switching element 5 can rotate around the center line of the rotating shaft 51. The first end of the torsion spring is connected to the switching element 5, and the other end is connected to the impact plate assembly 100.

[0095] like Figure 7 As shown, the impact plate assembly 100 includes a connected impact plate link 101 and a rocker arm 102. The impact plate link 101 is rotatably connected to the housing of the sweeper, and the rocker arm 102 is fixed to the impact plate link 101. When the impact plate assembly 100 collides with an obstacle at a height, the impact plate link 101 rotates around its own central axis, causing the rocker arm 102 to rotate synchronously. The rocker arm 102 then actuates one end of the switching element 5, thereby separating the switching element 5 from the adjusting element 421.

[0096] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0097] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0098] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A universal wheel lifting assembly of a floor sweeping machine, characterized in that, The universal wheel lifting assembly includes: Bracket (1), suitable for connection to the casing of the sweeper; The universal wheel mechanism (2) is elastically connected to the bracket (1). The universal wheel mechanism (2) has an extended state and a retracted state. The distance between the ground end of the universal wheel mechanism (2) and the bracket (1) in the extended state is greater than the distance in the retracted state. A drive mechanism (4) is connected to the universal wheel mechanism (2) in a transmission manner. The drive mechanism (4) can switch between a linkage mode and a non-linkage mode. In the linkage mode, the drive mechanism (4) is linked with the universal wheel mechanism (2), thereby driving the universal wheel mechanism (2) to switch from the retracted state to the extended state. In the non-linkage mode, the drive mechanism (4) is delinked from the universal wheel mechanism (2), thereby causing the universal wheel mechanism (2) to switch from the extended state to the retracted state.

2. The caster wheel lift assembly of claim 1, wherein, The drive mechanism (4) is provided with an adjusting member (421), which has a fixed state and a free state; in the fixed state, the drive mechanism (4) is in the linkage mode; in the free state, the drive mechanism (4) is in the non-linkage mode. The universal wheel lifting assembly also includes a switching component (5), which can engage and disengage with the adjusting component (421) to allow the adjusting component (421) to switch between the fixed state and the free state.

3. The omni-wheel lift assembly of claim 2, wherein, The drive mechanism (4) includes a drive member (41) and a reducer (42) that are connected by transmission. The reducer includes a sun gear (422), a planet carrier (423) and a plurality of planetary gears (424). The sun gear (422) is connected to the drive member (41). The planet carrier (423) is connected by transmission to the universal wheel mechanism (2). The plurality of planetary gears (424) are mounted on the planet carrier (423) and mesh with the sun gear (422) respectively. The adjusting member (421) is a gear ring and is coaxially arranged with the sun gear (422) and the planet carrier (423). The adjusting member (421) has an internal toothed portion (4211) and an external toothed portion (4212). The internal toothed portion (4211) meshes with a plurality of planetary gears (424) respectively, and the external toothed portion (4212) is used to cooperate with the switching member (5).

4. The omni-wheel lift assembly of claim 3, wherein, The external toothed part (4212) is ratchet-shaped, and the switching part (5) is pawl-shaped.

5. The omni-wheel lift assembly of claim 3, wherein, The switching member (5) and the external tooth (4212) are configured to allow the adjusting member (421) to rotate in a first rotational direction and prevent the adjusting member (421) from rotating in a second rotational direction; wherein, when the driving member (41) drives the universal wheel mechanism (2) to switch from the retracted state to the extended state, the rotation direction of the sun gear (422) is the first rotational direction, and the second rotational direction is opposite to the first rotational direction.

6. The caster lift assembly of claim 3, wherein, The universal wheel lifting assembly also includes a transmission mechanism (6), which includes a first transmission member (61) and a second transmission member (62) that are connected by transmission. The first transmission member (61) is connected to the planetary carrier (423), and the second transmission member (62) is connected to the universal wheel mechanism (2). The second transmission member (62) can move along a first direction (Z) under the drive of the first transmission member (61).

7. The omni-wheel lift assembly of claim 6, wherein, The first transmission member (61) has a first toothed surface (611), and the second transmission member (62) has a second toothed surface (621) extending along the first direction (Z), and the first toothed surface (611) and the second toothed surface (621) mesh with each other.

8. The omni-wheel lift assembly of claim 6, wherein, The universal wheel lifting assembly also includes an elastic element (3). The universal wheel mechanism (2) includes a connected universal wheel body (21) and a connecting shaft (22). The connecting shaft (22) extends along the first direction (Z). The connecting shaft (22) is movably inserted through the bracket (1). The elastic element (3) is sleeved on the outer periphery of the connecting shaft (22).

9. The omni-wheel lift assembly of claim 8, wherein, The first end of the second transmission component (62) is connected to the end of the connecting shaft (22); When the universal wheel mechanism (2) is in the extended state, the second end of the second transmission member (62) is used to abut against the bracket (1).

10. The caster lift assembly of claim 2, wherein, The switching element (5) is provided with a rotating shaft (51) and a torsion spring. The switching element (5) is able to rotate around the center line of the rotating shaft (51), and the torsion spring is arranged around the rotating shaft (51).

11. A robot vacuum cleaner characterised in that, The sweeper includes a housing and a universal wheel lifting assembly as described in any one of claims 1 to 10, wherein the bracket (1) of the universal wheel lifting assembly is connected to the housing.

12. The robot of claim 11, wherein, The sweeper also includes a collision plate assembly (100); The drive mechanism (4) of the universal wheel lifting assembly is provided with an adjusting member (421), which has a fixed state and a free state; in the fixed state, the drive mechanism (4) is in the linkage mode; in the free state, the drive mechanism (4) is in the non-linkage mode. The universal wheel lifting assembly also includes a switching component (5), which can engage and disengage with the adjusting component (421) to allow the adjusting component (421) to switch between the fixed state and the free state. The switching element (5) is provided with a rotating shaft (51) and a torsion spring. The switching element (5) can rotate around the center line of the rotating shaft (51). The first end of the torsion spring is connected to the switching element (5), and the other end is connected to the impact plate assembly (100) for transmission.

Images