Mobile wheel mechanism and cleaning equipment

Abstract

This application relates to the technical field of cleaning equipment, and in particular to a moving wheel mechanism and a cleaning unit; the moving wheel mechanism comprises a set of moving wheels, a cam, and a drive assembly. The drive assembly is fixed to the first housing of the cleaning unit, and the drive assembly is connected to the cam. The cam engages with the set of moving wheels, and the set of moving wheels is connected by sliding motion to the second housing of the cleaning unit, with the direction of sliding motion being vertical. (Figure 1)

Description

Title of the invention: Mobile wheel mechanism and cleaning equipment Technical field

[0001] The present application relates to the technical field of cleaning equipment, and in particular to a mobile wheel mechanism and cleaning equipment.

[0002] Background technique

[0003] When moving the cleaning equipment, in order to maintain balance and normal operation, the distance between the bottom of the cleaning equipment and the ground should not be too large; but in some special cases, the distance between the bottom and the ground is too close, which affects the operation of the cleaning equipment; for example, when encountering obstacles, too low a bottom causes the obstacle crossing to fail; in the case of deep water, too low a bottom causes water to penetrate into the cleaning equipment and damage the cleaning equipment.

[0004] Content of the invention

[0005] In response to the above-mentioned problems of the prior art, the present application designs a movable wheel mechanism, more specifically, the movable wheel assembly is driven by the cam to slide relative to the second housing, thereby varying the height difference between the movable wheel assembly and the second housing, and thus the distance between the cleaning equipment body and the ground.

[0006] In order to solve the above-mentioned problem, the present application provides a movable wheel mechanism comprising a movable wheel assembly, a cam and a drive assembly.

[0007] Said drive assembly is fixedly connected to a first housing of a cleaning equipment, and said drive assembly is drivingly connected to the cam;

[0008] Said cam fits into said movable wheel assembly, which is slidably connected to a second housing of said cleaning equipment and the sliding direction is in the height direction.

[0009] Preferably, said drive assembly comprises a drive unit and a transmission shaft, said drive unit being fixed to said first housing, said drive unit being drivingly connected to one end of said transmission shaft, and another end of said transmission shaft being connected to said first housing via the rolling structure;

[0010] Said cam is fixedly connected to said transmission shaft.

[0011] Preferably, said movable wheel assembly comprises a nesting pressure plate, a sliding sleeve, a movable wheel mounting seat and a movable wheel, said movable wheel is mounted on the mounting seat of said movable wheel;

[0012] Said sliding sleeve is slidably connected to said second housing and said sliding sleeve is connected to the mounting seat of said movable wheel;

[0013] Said cam fits into said fitting pressure plate, said fitting pressure plate is fixed to said sliding sleeve.

[0014] Preferably, said movable wheel assembly further comprises an elastic element, one end of said elastic element is connected to the nesting pressure plate, the other end of said elastic element is connected to said second housing.

[0015] Preferably, an inclined plane and a horizontal plane are placed on said nesting pressure plate, said inclined plane is adjacent to said horizontal plane and said inclined plane is higher than said horizontal plane.

[0016] Preferably, a nesting pulley is placed on said cam, which nests into the nesting pressure plate via said nesting pulley.

[0017] Preferably, said cam comprises a distal central end remote from said transmission shaft and a proximal central end close to said transmission shaft, the nesting pulley is placed on said distal central end.

[0018] Preferably, said cam engages in said engagement pressure plate by the curvature surface of said cam.

[0019] Preferably, a universal rotating shaft is placed on the mounting seat of said movable wheel, and a mounting hole of the rotating shaft is placed in said sliding sleeve;

[0020] The mounting seat of said movable wheel is rotatably connected to said sliding sleeve via said universal rotating shaft and the mounting hole of said rotating shaft.

[0021] Preferably, an anti-stall locking structure is provided in the mounting hole of said rotary shaft and the mounting hole of said rotary shaft is fixed outside of said universal rotary shaft;

[0022] Said anti-unhooking locking structure fits into said universal rotating shaft.

[0023] On the other hand, the present application also provides cleaning equipment, said cleaning equipment comprises the movable wheel mechanism described above, a first housing and a second housing.

[0024] Thanks to the technical solution described above, the mobile wheel mechanism described in the present application has the following beneficial effects: By fixingly connecting the drive assembly to the first housing, the cam fits into the moving wheel assembly which is slidingly connected to the second housing in the height direction, so as to be able to rotate the cam under the driving of the drive assembly, so that the moving wheel assembly slides relative to the second housing under the action of the fitting force, varying the height difference between the moving wheel assembly and the second housing, and thus the distance between the cleaning equipment body and the ground to meet the needs of different operation scenarios of the cleaning equipment, in other words, to improve the flexibility of the moving wheel mechanism and the operation of the cleaning equipment.

[0025] The height difference between the moving wheel assembly and the second housing can be changed by placing the cam and the drive assembly, thereby avoiding the use of complex structures such as a lead screw, and thus simplifying the varied mechanical structure of the bottom of the cleaning equipment and reducing the manufacturing cost of the moving wheel mechanism.

[0026] Description of Accompanying Figures

[0027] In order to illustrate more clearly the technical solutions of the present application, a brief description of the accompanying Figures to be used in describing the embodiments or existing technique will be given below. It is obvious that the accompanying Figures in the description below are only some of the embodiments of the present application, and for those ordinary in the art, other accompanying Figures can be obtained based on these Figures without any creative work.

[0028] [Fig. 1] is a structural map of the moving wheel mechanism provided by the embodiment of the present application;

[0029] [Fig.2] is a structural map of the drive assembly in the moving wheel mechanism provided by the embodiment of the present application;

[0030] [Fig.3] is an assembly diagram of the bearing support in the moving wheel mechanism provided by the embodiment of the present application;

[0031] [Fig.4] is a structural map of the moving wheel assembly in the moving wheel mechanism provided by the embodiment of the present application;

[0032] [Fig.5] is a structural map of the nesting pressure plate in the moving wheel mechanism provided by the embodiment of the present application;

[0033] [Fig.6] is a structural map of the cam in the moving wheel mechanism provided by the embodiment of the present application;

[0034] [Fig.7] is a structural map of the cam in the moving wheel mechanism provided by another embodiment of the present application;

[0035] [Fig.8] is an assembly sectional view of the sliding sleeve and the movable wheel mounting seat in the movable wheel mechanism provided by the embodiment of the present application.

[0036] 1 - movable wheel assembly, 11 - nesting pressure plate, 111 - plane inclined, 112 - horizontal plane, 12 - sliding sleeve, 121 - rotating shaft mounting hole, 122 - anti-off locking structure, 13 - movable wheel mounting seat, 131 - universal rotating shaft, 14 - movable wheel, 15 - elastic element, 2 - cam, 21 - nesting pulley, 22 - pulley shaft, 3 - drive assembly, 31 - drive unit, 32 - transmission shaft, 33 - bearing assembly, 34 - coupling, 4 - first housing, 41 - servo motor mounting housing, 42 - bearing bracket, 5 - second housing.

[0037] Specific embodiments

[0038] The technical solutions of the embodiments of the present application will be described clearly and completely in the following, in connection with the accompanying Figures of the embodiments of the present application, and it is clear that the described embodiments represent only a part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in the field without resorting to any creative work fall within the scope of protection of the present application.

[0039] By "an embodiment" or "embodiments" is meant herein a feature, structure or characteristic that may be included in at least one embodiment of the present application. In the description of the present application, it is understood that the terms "top", "bottom", "left", "right", "top", "bottom", etc. indicate orientations or positional relationships based on those illustrated in the accompanying Figures, solely for the purpose of facilitating and simplifying the description of the present application, and are not intended to indicate or imply that the devices or elements mentioned must have a particular orientation and be constructed and operated in a particular orientation, which therefore cannot be construed as a limitation of the present application.Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Accordingly, a feature defined as "first" or "second" may expressly or implicitly include one or more such features. In addition, the terms "first" and "second", etc. are used to distinguish similar objects and need not be used to describe a particular sequence or order of priority. It is understood that the data so used may be interchangeable, where appropriate, so that the embodiments of the present application described herein may be implemented in a sequence other than those illustrated or described herein.

[0040] In combination with [Fig. 1], a movable wheel mechanism provided by the embodiment of the present application is described. The movable wheel mechanism comprises a movable wheel assembly 1, a cam 2 and a drive assembly 3, the drive assembly 3 is fixedly connected to the first housing 4 of the cleaning equipment, the drive assembly 3 is drivingly connected to the cam 2; the cam 2 fits into the movable wheel assembly 1, the movable wheel assembly 1 is slidingly connected to the second housing 5 of the cleaning equipment, and the sliding direction is in the height direction.

[0041] In the embodiment of the present application, the movable wheel assembly 1 is always in contact with the ground, and the second movable wheel assembly 1 is used to drive the cleaning equipment to move; the cam 2 is used to drive the second movable wheel assembly 1 to slide relative to the second housing 5 under the drive of the drive assembly 3; and the drive assembly 3 is used to drive the cam 2 to rotate.

[0042] In the specific embodiment of the present application, the first housing 4 and the second housing 5 refer to two different housing structures; preferably, the first housing 4 can be disassemblably connected to the second housing 5.

[0043] In another preferred embodiment of the present application, the first housing 4 is fixedly connected to the second housing 5; preferably, the first housing 4 is molded integrally with the second housing 5.

[0044] In another specific embodiment of the present application, in the case where the first housing 4 is molded integrally with the second housing 5, it is understood that the first housing 4 and the second housing 5 refer to two different parts of the same housing.

[0045] In the specific embodiment of the present application, the first housing 4 and the second housing 5 are both housings located at the bottom of the cleaning equipment, and the cleaning equipment body moves relative to the ground with the movement of the second housing 5. More specifically, in the case where the second housing 5 moves in the opposite direction to the moving wheel assembly 1, the cleaning equipment body moves in the opposite direction to the ground; and in the case where the second housing 5 approaches the moving wheel assembly 1, the cleaning equipment approaches the ground.

[0046] In the embodiment of the present application, by fixingly connecting the drive assembly 3 to the first housing 4, the cam 2 fits into the movable wheel assembly 1 and the movable wheel assembly 1 is slidably connected to the second housing 5 in the height direction, so as to be able to rotate the cam 2 under the driving of the drive assembly 3, so that the movable wheel assembly 1 slides relative to the second housing 5 under the action of the fitting force; by varying the height difference between the movable wheel assembly 1 and the second housing 5, and thus the distance between the cleaning equipment body and the ground to meet the needs of different operation scenarios of the cleaning equipment, in other words, to improve the flexibility of the movable wheel mechanism and the operation of the cleaning equipment.

[0047] In the embodiment of the present application, the height difference between the movable wheel assembly 1 and the second housing 5 can be changed by placing the cam 2 and the drive assembly 3, thereby avoiding the use of complex structures such as a lead screw, and thus simplifying the varied mechanical structure of the bottom of the cleaning equipment and reducing the manufacturing cost of the movable wheel mechanism.

[0048] Referring to Figures 1 and 2, in the embodiment of the present application, the drive assembly 3 comprises a drive unit 31 and a transmission shaft 32, the drive unit 31 is fixedly connected to the first housing 4, the drive unit 31 is drivingly connected to one end of the transmission shaft 32, and the other end of the transmission shaft 32 is connected to the first housing 4 via a rolling structure; and the cam 2 is fixedly connected to the transmission shaft 32.

[0049] In the embodiment of the present application, the drive unit 31 is used to drive the transmission shaft 32 to rotate, and the transmission shaft 32 is used to drive the cam 2 to move under the drive of the drive unit 31; the other end of the transmission shaft 32 is connected to the first housing 4 through a bearing structure to characterize the transmission shaft 32 to be able to rotate relative to the first housing 4; more specifically, the transmission shaft 32 is placed in the horizontal direction, and the cam 2 is mounted on the transmission shaft 32 and the corresponding bearing assemblies 33 are placed on both sides of the cam 2 respectively; more specifically, the bearing assembly 33 comprises two circlips and a bearing.

[0050] In the embodiment of the present application, by placing the drive assembly 3 as the drive unit 31 and the drive shaft 32 to drive the rotation of the cam 2 and realize the driving of the cam 2 via a simple structure, which in turn simplifies the varied mechanical structure of the bottom of the cleaning equipment and reduces the manufacturing cost of the moving wheel mechanism.

[0051] In the specific embodiment of the present application, the drive unit 31 is connected to the transmission shaft 32 via the coupling 34.

[0052] In the specific embodiment of the present application, the drive unit 31 may be a servo motor, and the servo motor may accurately control the drive position or angle; preferably, the height difference between the movable wheel assembly 1 and the second housing 5 may be set to a minimum when the drive angle is 0°; the height difference between the movable wheel assembly 1 and the second housing 5 may be set to a maximum when the drive angle is 90°.

[0053] In the specific embodiment of the present application, the first housing 4 comprises a servo motor mounting housing 41, the servo motor is fixed to the servo motor mounting housing 41.

[0054] In another specific embodiment of the present application, the cam 2 may be transformed into a camshaft, in which case the drive unit 31 may directly drive the rotation of the cam 2.

[0055] Referring to [Fig.3], in the specific embodiment of the present application, the first housing 4 further comprises a bearing support 42, wherein the other end of the transmission shaft 32 is connected to the bearing support 42 via the bearing structure; preferably, a placement space for the protection of the cam 2 is provided on the bearing support 42.

[0056] In another specific embodiment of the present application, the drive unit 31 may also be a drive motor.

[0057] Referring to [Fig.4], in the embodiment of the present application, the movable wheel assembly 1 comprises a nesting pressure plate 11, a sliding sleeve 12, a movable wheel mounting seat 13, and a movable wheel 14, the movable wheel 14 is mounted on the movable wheel mounting seat 13; the sliding sleeve 12 is slidably connected to the second housing 5, and the sliding sleeve 12 is connected to the movable wheel mounting seat 13; and the cam 2 nests into the nesting pressure plate 11, the nesting pressure plate 11 is fixed to the sliding sleeve 12.

[0058] In the embodiment of the present application, the nesting pressure plate 11 is used to transmit the nesting force of the cam 2 to the sliding sleeve 12 in order to slide the sliding sleeve 12 relative to the second housing 5.

[0059] In the specific embodiment of the present application, the cam 2 has a height greater than the ground clearance of the nesting pressure plate 11. In the case where the ground clearance height of the cam 2 is greater than that of the nesting pressure plate 11 and the cam 2 presses the nesting pressure plate 11 toward the ground, the sliding sleeve 12 slides relative to the second housing 5, and the moving wheel assembly 1 moves in the direction opposite to the second housing 5, and the cleaning equipment body moves in the direction opposite to the ground, raising the cleaning equipment.

[0060] In the specific embodiment of the present application, a sliding block is placed on one of the sliding sleeve 12 or the second housing 5, a sliding groove on the other, and the sliding block is cooperatively connected to the sliding groove; more specifically, the sliding block may be placed on the sliding sleeve 12, and the sliding groove may be placed on the second housing 5; alternatively, the sliding block may be placed on the second housing 5, and the sliding groove may be placed on the sliding sleeve 12.

[0061] In the specific embodiment of the present application, the nesting pressure plate 11 is integrally molded with the sliding sleeve 12.

[0062] In the specific embodiment of the present application, the mounting seat of the movable wheel 13 can rotate relative to the sliding sleeve 12, then at that time the movable wheel 14 is a universal wheel.

[0063] In another specific embodiment of the present application, the sliding sleeve 12 can also be fixedly connected to the mounting seat of the movable wheel 13, the movable wheel 14 is then a directional wheel.

[0064] In the embodiment of the present application, by placing the nesting pressure plate 11 and the sliding sleeve 12 in the moving wheel assembly 1, the cam 2 nests in the nesting pressure plate 11, and the sliding sleeve 12 is slidably connected to the second housing 5, so as to realize the change of the height difference between the moving wheel assembly 1 and the second housing 5 via a simple structure, thereby avoiding the use of complex structures such as a lead screw, and thus simplifying the various mechanical structure of the bottom of the cleaning equipment and reducing the manufacturing cost of the moving wheel mechanism.

[0065] In the embodiment of the present application, the movable wheel assembly 1 further comprises an elastic element 15, one end of the elastic element 15 is fixedly connected to the nesting pressure plate, the other end of the elastic element 15 is fixedly connected to the second housing 5.

[0066] In the embodiment of the present application, the elastic element 15 is used to provide a rebound force in the event of movement of the movable wheel assembly 1 near the first housing 4.

[0067] In the embodiment of the present application, the setting of an elastic member 15 in the movable wheel assembly 1 makes it possible, in the event of movement of the movable wheel assembly 1 near the first housing 4, to provide a rebound force in order to avoid relying on gravity alone for the cleaning equipment to fall back and mechanical wear in the process of its own fall back, and to improve the reliability of the movable wheel mechanism and the cleaning equipment.

[0068] Referring to [Fig.5], in the embodiment of the present application, an inclined plane 111 and a horizontal plane 112 are placed on the nesting pressure plate 11, the inclined plane 111 is adjacent to the horizontal plane 112, and the inclined plane 111 is higher than the horizontal plane 112.

[0069] In the specific embodiment of the present application, in the case where the cam 2 fits into the inclined plane 111, the height difference between the movable wheel assembly 1 and the second housing 5 is a first height difference; in the case where the cam 2 fits into the horizontal plane 112, the height difference between the movable wheel assembly 1 and the second housing 5 is a second height difference; it is provided that the first height difference is smaller than the second height difference; since the movable wheel assembly 1 is always in contact with the ground, if the ground clearance of the second movable wheel assembly 1 is set to zero, the first height difference as well as the second height difference can be equal to the ground clearance of the bottom of the cleaning equipment;in other words, in the case where the cam 2 fits into the inclined plane 111, the ground clearance of the bottom of the cleaning equipment is lower than that in the case where the cam 2 fits into the horizontal plane 112. ;

[0070] In the specific embodiment of the present application, the inclined plane 111 may be an inclined plane or an inclined curved surface.

[0071] In the embodiment of the present application, the inclined plane 111 is placed to utilize the height difference between the inclined plane 111 and the horizontal plane 112 to have an effect on the variation of the height difference between the moving wheel assembly 1 and the second housing 5, thereby avoiding the variation of the height difference depending solely on the variation of the curvature of the cam 2 themselves, and also being able to reduce the effect of the wear of the cam 2 causing the occurrence of an error in the variation of the height difference, and improving the reliability of the moving wheel mechanism and thus the cleaning equipment.

[0072] Referring to [Fig.6], in the embodiment of the present application, a pulley nesting plate is placed 21 on the cam 2, the cam 2 nests into the nesting pressure plate 11 via the nesting pulley 21.

[0073] In the embodiment of the present application, the nesting pulley 21 is arranged to reduce friction during rotation of the cam 2, reduce wear of the surface of the cam 2, and thus improve the reliability of the cleaning equipment; furthermore, the arrangement of the nesting pulley 21 can also reduce the driving force for driving the movement of the cam 2 on the nesting pressure plate 11.

[0074] In the specific embodiment of the present application, the nesting pulley 21 is mounted on the cam 2 via the pulley shaft 22.

[0075] In the embodiment of the present application, the cam 2 comprises a distal central end remote from the transmission shaft 32 and a proximal central end close to the transmission shaft 32, the nesting pulley 21 is placed on the distal central end.

[0076] In the specific embodiment of the present application, the distal central end of the cam 2 is a nesting plane, and in the case where the nesting pulley 21 moves to a predefined position, the cam 2 nests with the horizontal plane 112 through the nesting plane; by placing the nesting plane at the distal central end, it is thus possible to realize the self-locking of the cam 2 in the case of driving at the predefined angle to avoid continuous driving force output to reduce the energy loss of the cleaning equipment.

[0077] Referring to [Fig.7], in another embodiment of the present application, the cam 2 fits into the fitting pressure plate 11 by the curvature surface of the cam 2.

[0078] In another specific embodiment of the present application, it is possible to reduce the size of the movable wheel mechanism by having the bending surface of the cam 2 directly fitted into the fitting pressure plate 11, while the force arm is shorter, thereby reducing the load on the drive unit.

[0079] In another specific embodiment of the present application, in the case where the cam 2 engages in the engagement pressure plate 11 by the curvature surface of the cam 2, the engagement pressure plate 11 may have and have only a horizontal plane 112, which further reduces the size of the movable wheel mechanism.

[0080] In another specific embodiment of the present application, the height difference between the movable wheel assembly 1 and the second housing 5 is a third height difference in the case where the cam 2 fits into the plate of nesting pressure 11 through the bending surface of the cam 2, the nesting pressure plate 110 has and has only a horizontal plane 112, and the distal central end of the cam 2 nests in the nesting pressure plate 11; the height difference between the moving wheel assembly 1 and the second housing 5 is a fourth height difference in the case where the cam 2 nests in the nesting pressure plate 11 through the bending surface of the cam 2, the nesting pressure plate 110 has and has only a horizontal plane 112, and the proximal central end of the cam 2 nests in the nesting pressure plate 11; the third height difference is larger than the fourth height difference.

[0081] In another specific embodiment of the present application, in the case where the cam 2 fits into the fitting pressure plate 11 by the curvature surface of the cam 2, an inclined plane 111 and a horizontal plane 112 may be placed on the fitting pressure plate 11.

[0082] Referring to [Fig.8], in the embodiment of the present application, a universal rotating shaft 131 is placed on the movable wheel mounting seat 13, and a rotating shaft mounting hole 121 is placed on the sliding sleeve 12; the movable wheel mounting seat 13 is rotatably connected to the sliding sleeve 12 via the universal rotating shaft 131 and the rotating shaft mounting hole 121.

[0083] In the specific embodiment of the present application, the mounting hole of the rotating shaft 121 is placed in the height direction.

[0084] In the embodiment of the present application, by rotatably connecting the movable wheel mounting seat 13 to the sliding sleeve 12 via the universal rotating shaft 131 and the rotating shaft mounting hole 121, it is possible to realize the rotation of the movable wheel 14 relative to the first housing 4, and thus the universal rotation of the movable wheel 14, to improve the reliability of the movable wheel mechanism and the movement of the cleaning equipment.

[0085] In the specific embodiment of the present application, the sliding sleeve 12 comprises a sliding portion and a fixing portion, wherein the height of the sliding portion from the ground is greater than the height of the fixing portion from the ground; the sliding portion is fixedly connected to the fixing portion by means of fasteners, and the fixing portion is used for connecting to the mounting seat of the moving wheel 13; preferably, the fasteners are screws.

[0086] In the specific embodiment of the present application, the fixing portion comprises a rotary shaft mounting hole 121 and at least one fixing hole, and the sliding portion is fixed to the fixing portion via at least one fixing hole.

[0087] In the embodiment of the present application, an anti-stall locking structure 122 is placed in the rotary shaft mounting hole 121 and the rotary shaft mounting hole 121 is fixed outside the universal rotary shaft 131; the anti-stall locking structure 122 is snap-coupled with the universal rotary shaft 131.

[0088] In the embodiment of the present application, the reliability of the movable wheel mechanism is improved by setting an anti-drop locking structure 122 in the rotary shaft mounting hole 121, thereby preventing the universal rotary shaft 131 from being disengaged from the connection with the rotary shaft mounting hole 121, thereby improving the reliability of the movable wheel mechanism and the cleaning equipment.

[0089] The following paragraphs describe the specific operating principle of the movable wheel mechanism in the embodiments of the present application.

[0090] Normal operating state of the cleaning apparatus: in the case where the drive angle of the drive unit 31 (servomotor) is a first predefined angle and the nesting pulley 21 nests in the nesting pressure plate 11, the nesting pulley 21 on the distal central end of the cam 2 nests in the inclined plane 111 of the nesting pressure plate 11; in the case where the cam 2 nests in the nesting pressure plate 11 through the curvature surface of the cam 2 and the nesting pressure plate 110 and has only a horizontal plane 112, the proximal central end of the cam 2 nests in the nesting pressure plate 11; at this time, the height difference between the movable wheel assembly 1 and the second housing 5 is minimal to allow the cleaning equipment to be balanced and operate properly; preferably, the first preset angle is 0°.

[0091] High state of the bottom of the cleaning equipment: in the case where the drive angle of the drive unit 31 (servomotor) is a second predetermined angle and the nesting pulley 21 nests in the nesting pressure plate 11, the nesting plane of the distal central end of the cam 2 nests in the horizontal plane 112 of the nesting pressure plate 11; in the case where the cam 2 nests in the nesting pressure plate 11 through the curvature surface of the cam 2 and the nesting pressure plate 110 and has only a horizontal plane 112, the proximal central end of the cam 2 nests in the nesting pressure plate 11; at this time, the height difference between the second set of moving wheels 1 and the second housing 5 is maximum to facilitate the crossing of obstacles or other scenarios requiring the elevation of the bottom of the cleaning equipment; preferably, the second preset angle is 90°; more precisely, from the normal operating state to the raised state of the bottom, the cam 2 exerts pressure on the nesting pressure plate 11 towards the ground.

[0092] Furthermore, the height difference between the movable wheel assembly 1 and the second housing 5 can also be adjusted in the case where the drive angle of the drive unit 31 (servomotor) is a third predefined angle, the third predefined angle is located between the first predefined angle and the second predefined angle, so that the cleaning equipment can perform bottom lifting at different heights based on the drive angles of the different drive units 31; preferably, 0° < third predefined angle < 90°.

[0093] The movable wheel mechanism in the embodiments of the present application has the following beneficial effects: By fixingly connecting the drive assembly 3 to the first housing 4, the cam 2 fits into the movable wheel assembly 1 and the movable wheel assembly 1 is slidably connected to the second housing 5 in the height direction, so as to be able to rotate the cam 2 under the driving of the drive assembly 3, so that the movable wheel assembly 1 slides relative to the second housing 5 under the action of the fitting force by varying the height difference between the movable wheel assembly 1 and the second housing 5, and thus the distance between the cleaning equipment body and the ground to meet the needs of different operation scenarios of the cleaning equipment, in other words, to improve the flexibility of the movable wheel mechanism and the operation of the cleaning equipment.

[0094] The height difference between the moving wheel assembly 1 and the second housing 5 can be changed by placing the cam 2 and the drive assembly 3, thereby avoiding the use of complex structures such as a lead screw, and thus simplifying the varied mechanical structure of the bottom of the cleaning equipment and reducing the manufacturing cost of the second moving wheel mechanism.

[0095] The embodiment of the present application also provides cleaning equipment which comprises a movable wheel mechanism, a first housing 4 and a second housing 5 in the embodiment of the present application.

[0096] In the specific embodiment of the present application, the cleaning equipment may be cleaning equipment such as a sweeper or a sweeping robot.

[0097] The foregoing description has sufficiently disclosed the specific embodiments of the present application. It should be noted that any modifications made to the specific embodiments of the present application by the technicians familiar with the field does not depart from the scope of the claims of the present application. Therefore, the scope of the claims of the present application is not limited to the specific embodiments mentioned above.

Claims

Claims

1. A movable wheel mechanism characterized in that it comprises a movable wheel assembly (1), a cam (2) and a drive assembly (3), said drive assembly (3) is fixedly connected to a first housing (4) of a cleaning equipment, and said drive assembly (3) is drivingly connected to said cam (2); said cam (2) fits into the movable wheel assembly (1), said movable wheel assembly (1) is slidingly connected to a second housing (5) of said cleaning equipment and the sliding direction is in the height direction.

2. A movable wheel mechanism according to claim 1, characterized in that said drive assembly (3) comprises a drive unit (31) and a transmission shaft (32), said drive unit (31) being fixed to said first housing (4), said drive unit (31) is drivingly connected to one end of said transmission shaft (32), and another end of said transmission shaft (32) is connected to said first housing (4) via a rolling structure; said cam (2) is fixedly connected to said transmission shaft (32).

3. A movable wheel mechanism according to claim 1 or 2, characterized in that said movable wheel assembly (1) comprises a nesting pressure plate (11), a sliding sleeve (12), a movable wheel mounting seat (13) and a movable wheel (14), said movable wheel (14) being mounted on the mounting seat (13) of said movable wheel; said sliding sleeve (12) being slidably connected to said second housing (5) and said sliding sleeve (12) being connected to the mounting seat (13) of said movable wheel; said cam (2) nesting in said nesting pressure plate (11), said nesting pressure plate (11) being fixed to said sliding sleeve (12).

4. A movable wheel mechanism according to claim 3, characterized in that said movable wheel assembly (1) further comprises an elastic member (15), one end of said elastic member (15) is connected to the nesting pressure plate (11), the other end of said elastic member (15) is connected to said second housing (5).

5. A movable wheel mechanism according to claim 3, characterized in that an inclined plane (111) and a horizontal plane (112) are placed on said nesting pressure plate (11), said inclined plane (111) is adjacent to said horizontal plane (112), and said inclined plane (111) is higher than said horizontal plane (112).

6. A movable wheel mechanism according to claim 5, characterized in that a nesting pulley (21) is placed on said cam (2), said cam (2) nesting into the nesting pressure plate (11) via said nesting pulley (21).

7. A movable wheel mechanism according to claim 6, characterized in that said cam (2) comprises a distal central end remote from said transmission shaft (32) and a proximal central end close to said transmission shaft (32), the nesting pulley (21) being placed on said distal central end.

8. A movable wheel mechanism according to claim 3, characterized in that said cam (2) engages in said engagement pressure plate (11) by a curvature surface of said cam (2).

9. A movable wheel mechanism according to claim 3, characterized in that a universal rotating shaft (131) is placed on the mounting seat (13) of said movable wheel, and a mounting hole (121) of the rotating shaft is placed in said sliding sleeve (12); the mounting seat (13) of said movable wheel is rotatably connected to said sliding sleeve (12) via said universal rotating shaft (131) and the mounting hole (121) of said rotating shaft.

10. A mobile wheel mechanism according to claim 9, characterized in that an anti-drop locking structure (122) is placed in the mounting hole (121) of said rotary shaft and the mounting hole (121) of said rotary shaft is fixed outside said universal rotary shaft (131); said anti-drop locking structure (122) fits into said universal rotary shaft (131).

11. Cleaning equipment characterized in that it comprises a movable wheel mechanism, a first housing (4) and a second housing (5) according to any one of claims 1 to 10.

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