Roller assembly for cleaning equipment and cleaning equipment

Abstract

The invention discloses a roller assembly for cleaning equipment and the cleaning equipment, the roller assembly for the cleaning equipment comprises a wheel shaft, a roller body, a first elastic structure and a friction structure, the roller body is rotatably mounted on the wheel shaft, one end of the first elastic structure is fixedly arranged with the roller body, and the other end of the first elastic structure is fixedly arranged with the friction structure; the friction structure comprises a first friction structure and a second friction structure, the first friction structure is rotatably mounted on the axle and is fixedly arranged with the other end of the first elastic structure, and the second friction structure is fixed on the axle and is pressed against the first friction structure; when the roller body rotates in the first direction, the other end of the first elastic structure is driven to rotate, the first friction structure and the second friction structure limit the movement of the other end of the first elastic structure under the action of mutual friction, and the first elastic structure generates elastic deformation.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning devices, and in particular relates to a roller assembly for cleaning equipment and the cleaning equipment. Background Art

[0002] With the development of science and technology, cleaning equipment has also developed rapidly. Cleaning equipment includes mopping robots, handheld mopping machines, handheld sweepers, and so on. Taking handheld cleaning equipment as an example, users will push forward or pull back to complete cleaning when using it. Handheld cleaning equipment is usually bulky, and it is more laborious for users to push or pull the machine forward or backward. Taking a handheld floor scrubber as an example, due to the large amount of interference between the roller brush of the floor scrubber and the ground, when the roller brush rotates, it will apply a relatively large driving force to the machine that is consistent with the direction of rotation of the roller brush. This driving force will cause the floor scrubber to have excessive traction or resistance on the operator, resulting in a poor user experience. Summary of the invention

[0003] Therefore, the present invention provides a roller assembly and a cleaning device for a cleaning device, aiming to solve the technical problem that in the prior art, the roller brush of the cleaning device has a large interference with the ground, and when the roller brush rotates, a relatively large driving force consistent with the rotation direction of the roller brush is applied to the machine. The driving force can cause the floor scrubber to exert excessive traction or resistance on the operator, resulting in a poor user experience.

[0004] In order to solve the above technical problems, the present invention provides a roller assembly for a cleaning device, the roller assembly for a cleaning device comprising:

[0005] axle;

[0006] A roller body rotatably mounted on the wheel axle;

[0007] A first elastic structure, one end of which is fixedly disposed on the roller body; and

[0008] The friction structure comprises a first friction structure and a second friction structure, wherein the first friction structure is rotatably mounted on the wheel axle and fixedly arranged with the other end of the first elastic structure, and the second friction structure is fixed on the wheel axle and pressed against the first friction structure;

[0009] Among them, when the roller body rotates along the first direction, it drives the other end of the first elastic structure to rotate, and the first friction structure and the second friction structure limit the movement of the other end of the first elastic structure under the action of mutual friction, so that the first elastic structure undergoes elastic deformation at least along the tangential direction of the roller body; when the roller body rotates in the opposite direction of the first direction, the elastic restoring force of the first elastic structure acts on the roller body, pushing the roller body to rotate in the opposite direction of the first direction.

[0010] Preferably, in the roller assembly for cleaning equipment, the first elastic structure is a spiral spring, the outer ring of the spiral spring is fixed to the inner wall of the roller body, and the inner ring of the spiral spring is fixed to the first friction structure.

[0011] Preferably, in the roller assembly for cleaning equipment, the first friction structure includes a first mounting seat and a dynamic friction plate, the first mounting seat is rotatably mounted on the wheel axle and is fixed to the other end of the first elastic structure, and the dynamic friction plate is mounted on the first mounting seat and pressed against the second friction structure.

[0012] Preferably, in the roller assembly for cleaning equipment, the dynamic friction plate is elastically pressed against the second friction structure.

[0013] Preferably, in the roller assembly for cleaning equipment, the roller assembly for cleaning equipment also includes a second elastic structure and a locking structure, the second elastic structure and the locking structure are located on the side opposite to the first mounting seat and the second friction structure, the second elastic structure is arranged between the first mounting seat and the locking structure, and the locking structure is installed on the wheel axle.

[0014] Preferably, in the roller assembly for cleaning equipment, a first end cover is installed on the end surface of the wheel shaft body opposite to the first friction structure, and the first end cover is arranged through the wheel shaft;

[0015] The second elastic structure is located between the first end cover and the locking structure.

[0016] Preferably, in the roller assembly for cleaning equipment, the second friction structure is unidirectionally rotatably mounted on the wheel axle, the second friction structure can rotate in the opposite direction to the first direction and cannot rotate in the first direction.

[0017] Preferably, in the roller assembly for cleaning equipment, the second friction structure is mounted on the wheel axle through a one-way ball bearing.

[0018] Preferably, in the roller assembly for cleaning equipment, the second friction structure includes a second mounting seat, and a static friction plate, the second mounting seat is mounted on the wheel axle, and the static friction plate is mounted on the second mounting seat and pressed against the first friction structure.

[0019] In order to achieve the above object, the present invention further provides a cleaning device, which includes the above roller assembly for cleaning device.

[0020] The technical solution provided by the present invention has the following advantages:

[0021] The roller assembly for cleaning equipment provided by the present invention takes a floor scrubber as an example. When the floor scrubber is pushed forward, the roller body rotates in a first direction. At this time, the first friction structure and the second friction structure are limited by the interaction of friction force to limit the movement of the first friction structure. One end of the first elastic structure rotates with the roller body, and the other end of the first elastic structure is fixed to the first friction structure without rotating. The first elastic structure undergoes elastic deformation. At this time, the first elastic structure stores force. When the floor scrubber is pushed backward, the roller body rotates in the opposite direction of the first direction. The elastic reset force of the first elastic structure acts on the roller body to push the roller body to rotate in the opposite direction of the first direction, providing a backward pull assist, thereby reducing the resistance of the floor scrubber when it is pulled backward, solving the problem that the interference between the roller brush of the cleaning equipment and the ground in the prior art is large, and a relatively large driving force consistent with the rotation direction of the roller brush is applied to the machine when the roller brush rotates. The driving force causes the floor scrubber to have excessive traction or resistance on the operator, resulting in a poor user experience.

[0022] Furthermore, due to the press-fit between the first friction structure and the second friction structure, when the roller body rotates along the first direction, the first friction structure and the second friction structure are restricted by the interaction of the friction force and the movement of the first friction structure is restricted; when the stored force of the first elastic structure is sufficient to overcome the friction force between the first friction structure and the second friction structure, the first friction structure and the first elastic structure rotate together with the roller body, and the first elastic structure stops storing force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A three-dimensional diagram of an embodiment of a cleaning device provided by the present invention;

[0025] Figure 2 for Figure 1 A perspective view of an embodiment of a roller assembly for a cleaning device;

[0026] Figure 3 for Figure 2 An exploded schematic diagram of a roller assembly for a cleaning device;

[0027] Figure 4 for Figure 2 A cross-sectional view of a roller assembly for a cleaning device.

[0028] Description of reference numerals:

[0029]

[0030]

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0034] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0035] Cleaning equipment includes mopping robots, handheld mops, handheld sweepers, etc. Taking handheld cleaning equipment as an example, users will push or pull forward to complete cleaning. Handheld cleaning equipment is usually bulky, and it is more laborious for users to push or pull the machine forward or backward. Taking a handheld floor scrubber as an example, due to the large amount of interference between the roller brush of the floor scrubber and the ground, when the roller brush rotates, it will apply a relatively large driving force to the machine in the same direction as the rotation of the roller brush. This driving force will cause the floor scrubber to have excessive traction or resistance on the operator, resulting in a poor user experience.

[0036] Usually, the above problems can be solved by adding motors, circuit boards, sensors and other components. However, the cost of adding drive motors is generally high. In addition, the motor needs reaction time when switching between forward pushing and backward pulling, and the action is delayed, causing frustration.

[0037] Example 1

[0038] In order to solve the above problems, the present invention provides a roller assembly for a cleaning device, see Figures 1 to 4The roller assembly 100 for cleaning equipment includes a wheel shaft 1, a roller body 2, a first elastic structure 3 and a friction structure. The roller body 2 is rotatably mounted on the wheel shaft 1. One end 3a of the first elastic structure 3 is fixedly arranged with the roller body 2. The friction structure includes a first friction structure 41 and a second friction structure 42. The first friction structure 41 is rotatably mounted on the wheel shaft 1 and is fixedly arranged with the other end 3b of the first elastic structure 3. The second friction structure 42 is fixed on the wheel shaft 1 and pressed against the first friction structure 41. When the roller body 2 rotates in a first direction, the other end 3b of the first elastic structure 3 is driven to rotate. The first friction structure 41 and the second friction structure 42 limit the movement of the other end 3b of the first elastic structure 3 under the action of mutual friction. The first elastic structure 3 is elastically deformed at least along the tangential direction of the roller body 2. When the roller body 2 rotates in the opposite direction of the first direction, the elastic reset force of the first elastic structure 3 acts on the roller body 2 to push the roller body 2 to rotate in the opposite direction of the first direction.

[0039] Among them, the first elastic structure 3 can be a torsion spring, a spiral spring, etc., so that the expansion and contraction in the rotation direction can be achieved. Of course, it can also include other structures, which are not limited here. One end 3a and the other end 3b of the first elastic structure 3 are different positions of the first elastic structure 3. For example, one end 3a and the other end 3b of the first elastic structure 3 can be different position points on the first elastic structure 3 that are relatively set along the radial direction or axial direction of the wheel axle 1; but one end 3a and the other end 3b of the first elastic structure 3 are not limited to the above-mentioned relatively set position points.

[0040] There is no specific limitation on the fixing method of the first friction structure 41 and the axle 1 , and the first friction structure 41 may be connected to the axle 1 via a bearing so that it can rotate relative to the axle 1 , or may be fixed via other methods.

[0041] The first elastic structure 3, the first friction structure 41, and the second friction structure 42 can be arranged in sequence along the axial direction of the wheel axle to improve the compactness of the overall structure and facilitate assembly. Of course, the first elastic structure 3, the first friction structure 41, and the second friction structure 42 can also be arranged in other ways, which are not specifically limited here.

[0042] During specific operation, since one end 3a of the first elastic structure 3 is fixedly arranged with the roller body 2, when the roller body 2 rotates along the first direction, the roller body 2 drives one end 3a of the first elastic structure 3 to rotate, and at this time, the other end 3b of the first elastic structure 3 is fixed with the first friction structure 41, and the first friction structure 41 and the second friction structure 42 limit the movement of the other end 3b of the first elastic structure 3 under the action of mutual friction, in this way, one end 3a of the first elastic structure 3 rotates, and the other end 3b does not rotate, and the first elastic structure 3 undergoes elastic deformation along the tangential direction of the roller body, and the first elastic structure begins to accumulate force; When the wheel body 2 rotates in the opposite direction of the first direction, the first elastic structure 3 begins to release the stored force. Since one end 3a of the first elastic structure 3 is fixed to the roller body 2, the elastic restoring force of the first elastic structure 3 acts on the roller body 2 to push the roller body 2 to rotate in the opposite direction of the first direction. In this way, when the roller body 2 is pushed in the first direction, a part of the forward driving force can be offset to avoid excessive traction of the driving force on the operator. When pushed in the opposite direction of the first direction, the first elastic structure 3 releases the stored force, providing assistance to the roller body 2 in the opposite direction of the first direction, which can avoid excessive resistance and reduce the user experience.

[0043] For the sake of convenience, the cleaning device 200 is taken as a floor scrubber as an example, but it does not mean that the cleaning device 200 is limited to floor scrubbers. In addition, since the roller brush of the floor scrubber has a large amount of interference with the ground, the roller brush will apply a relatively large driving force to the machine in the same direction as the rotation direction of the roller brush when rotating. In this embodiment, the first direction is the direction in which the roller body 2 rotates when pushing forward, so that a part of the forward driving force can be offset when accumulating force, and some assistance can be provided when pushing backward to release the accumulated force.

[0044] More specifically, when the floor scrubber is pushed forward, the roller body 2 rotates in the first direction. At this time, the first friction structure 41 and the second friction structure 42 are limited by the friction force between each other to limit the movement of the first friction structure 41, and one end of the first elastic structure 3 rotates with the roller body 2, and the other end 3b of the first elastic structure 3 is fixed to the first friction structure 41 without rotating. The first elastic structure 3 undergoes elastic deformation, and the first elastic structure 3 accumulates force at this time; when the floor scrubber is pushed backward, the roller body 2 rotates in the opposite direction of the first direction, and the elastic reset force of the first elastic structure 3 acts on the roller body 2, pushing the roller body 2 to rotate in the opposite direction of the first direction, providing a backward pull assist, thereby reducing the resistance of the floor scrubber when pulling backward, and using a low-cost mechanical structure to improve the problem that the interference between the roller brush of the floor scrubber and the ground is large, and when the roller brush rotates, a relatively large driving force consistent with the rotation direction of the roller brush is applied to the machine, and the driving force will cause the floor scrubber to have excessive traction or resistance on the operator, resulting in a poor user experience. Technical problems.

[0045] Furthermore, due to the press-fit between the first friction structure 41 and the second friction structure 42, when the roller body 2 rotates along the first direction, the first friction structure 41 and the second friction structure 42 are restricted by the interaction of the friction force and the movement of the first friction structure 41 is limited. When the stored force of the first elastic structure 3 is sufficient to overcome the friction force between the first friction structure 41 and the second friction structure 42, the first friction structure 41 and the first elastic structure 3 rotate together with the roller body 2, and the first elastic structure 3 stops storing force.

[0046] The wheel axle 1 is used for fixed installation in the cleaning device 200. When the floor scrubber is pushed, the roller body 2 rotates around the wheel axle 1. More specifically, the roller body 2 includes a wheel body and a second end cover 72. The wheel body is rotatably installed on the wheel axle 1. The second end cover 72 passes through the wheel axle 1 and is installed on the end face of the wheel body opposite to the first friction structure 41.

[0047] The first elastic structure 3 is a structure that can be elastically deformed along the tangential direction of the roller body 2, such as a torsion spring, so that the expansion and contraction in the rotation direction can be achieved. In this embodiment, the first elastic structure 3 is a spiral spring 31, the outer ring of the spiral spring 31 is fixed to the inner wall of the roller body 2, and the inner ring of the spiral spring 31 is fixed to the first friction structure 41, so that it is easier to control when the roller is elastically deformed in the tangential direction. In other embodiments, the inner ring of the spiral spring 31 can also be fixed to the roller body 2, and the outer ring of the spiral spring 31 can be fixed to the first friction structure 41. No specific restrictions are made here. At this time, no matter one of the outer ring or inner ring of the spiral spring 31 is fixed to the first friction structure 41, and the other is fixed to the roller body 2, the spiral spring can be elastically deformed and force can be stored. The specific fixing method of the spiral spring 31 can be set according to needs. For the convenience of explanation, the first elastic structure 3 is taken as a spiral spring 31 as an example, but it does not mean that the first elastic structure 3 is limited to the spiral spring 31.

[0048] The first friction structure 41 can be arranged in various forms, for example, it can be a friction block, see Figure 3 and Figure 4, it can also be that the first friction structure 41 includes a first mounting seat 411 and a dynamic friction plate 412, the first mounting seat 411 is rotatably mounted on the wheel axle 1 and fixedly arranged with the other end 3b of the first elastic structure 3, the dynamic friction plate 412 is mounted on the first mounting seat 411 and pressed against the second friction structure 42, so that the dynamic friction plate 412 can be easily replaced. In addition, the material of the friction surface of the first friction structure 41 and the second friction structure 42 is usually selected to be a more wear-resistant material, which will increase the cost relative to conventional materials. In the present invention, by arranging the dynamic friction plate 412 on the first mounting seat 411, it is only necessary to select a wear-resistant material for the material of the dynamic friction plate 412 without selecting a wear-resistant material as a whole, so that the cost can be reduced. Of course, the first friction structure 41 can also include a first mounting seat 411, the first mounting seat 411 has a dynamic friction surface facing the second friction structure 42, and the dynamic friction surface rubs against the second friction structure 42, so that the structure is relatively simple.

[0049] See also Figure 3 and Figure 4 , the first friction structure 41 is pressed against the second friction structure 42, so that the first friction structure 41 can be limited to rotate relative to the second friction structure 42 by the friction force between the first friction structure 41 and the second friction structure 42. In order to ensure that the first friction structure 41 and the second friction structure 42 are pressed against each other, the first elastic structure 3 is usually elastically pressed against the second elastic structure 5. In addition, the force storage size of the first elastic structure 3 can be controlled by adjusting the elastic contact force between the first friction structure 41 and the second friction structure 42. In this way, the force storage size is convenient to control and adjust. When the force storage is completed, the first friction structure 41 rotates relative to the second friction structure 42 and stops storing force. More specifically, the moving friction plate 412 is elastically pressed against the second friction structure 42. In the specific setting, the second elastic structure 5 can be set on the side opposite to the first friction structure 41 and the second friction structure 42, or on the side where the first friction structure 41 and the second friction structure 42 are the same. For example, when the second elastic structure 5 is arranged on the same side as the first friction structure 41 and the second friction structure 42, the second elastic structure 5 is in a stretched state, so that the first friction structure 41 is elastically pressed against the second elastic structure 5; when the second elastic structure 5 is arranged on the opposite side of the first friction structure 41 and the second friction structure 42, the second elastic structure 5 is in a compressed state, so that the first friction structure 41 is elastically pressed against the second elastic structure 5. There is no specific restriction on whether the second elastic structure 5 is arranged on the same or opposite side of the first friction structure 41 and the second friction structure 42. Of course, when the second elastic structure 5 is arranged on the second side of the first friction structure 41 and the opposite side of the friction structure 42, it can be arranged at any position along the axial direction of the wheel axle 1, so that the structure is more compact and easy to assemble.

[0050] In this example, see Figure 3 and Figure 4 The roller assembly 100 for cleaning equipment further includes a second elastic structure 5 and a locking structure 6, wherein the second elastic structure 5 and the locking structure 6 are located on the opposite side of the first mounting seat 411 and the second friction structure 42, the second elastic structure 5 is arranged between the first mounting seat 411 and the locking structure 6, and the locking structure 6 is installed on the wheel shaft 1. Specifically, a first end cover 71 is installed on the end face of the wheel shaft 1 body on the opposite side of the first friction structure 41, the first end cover 71 passes through the wheel shaft 1, and the second elastic structure 5 is located between the first end cover 71 and the locking structure 6; the second end cover 72 can also be installed on the first end cover 71, and the second elastic structure 5 is located between the second end cover 72 and the second locking structure 6, so that the first friction structure 41 can be elastically pressed against the second friction structure 42 by adjusting the locking structure 6 to move toward the first mounting seat 411, so as to limit the mutual movement between the first friction structure 41 and the second friction structure 42, and can be switched to a slipping state when the power storage is completed.

[0051] The second elastic structure 5 can be a compression spring or an elastic structure. The following description takes the second elastic structure 5 as an example of a compression spring, but it does not mean that the second elastic structure 5 is limited to a compression spring. During installation, after the second end cover 72 passes through the wheel axle 1, one side of the second end cover 72 abuts against the first mounting seat 411, and the compression spring abuts against the other side of the second end cover 72 after passing through the wheel axle 1, and then the locking structure 6 is used to press and lock the compression spring toward the first friction structure 41 on the side opposite to the second end cover 72. The locking structure 6 and the wheel axle 1 can be snap-fitted or threaded, which is not specifically limited here. In this embodiment, the locking structure 6 is a locking nut. The degree of compression between the first friction structure 41 and the second friction structure 42 is adjusted by tightening the locking nut toward the first friction structure 41 to adjust the magnitude of the friction between the first friction structure 41 and the second friction structure 42 that needs to be overcome when stopping the accumulation of force.

[0052] In addition, since the second end cover 72 is abutted against the first mounting seat 411, and the first mounting seat 411 is rotatably connected to the wheel axle 1, in order to reduce the friction between the second end cover 72 and the end surface of the first mounting seat 411, an end face bearing 82 can be installed between the first mounting seat 411 and the second end cover 72, and the end face bearing 82 is installed on the wheel axle 1.

[0053] The second friction structure 42 includes a second mounting seat 421 and a static friction plate 422. The second mounting seat 421 is mounted on the wheel axle 1. The static friction plate 422 is mounted on the second mounting seat 421 and is pressed against the first friction structure 41. More specifically, the dynamic friction plate 412 is pressed against the static friction plate 422. In addition, the material of the friction surface of the first friction structure 41 and the second friction structure 42 is usually selected to be a more wear-resistant material, which will increase the cost compared with conventional materials. The present invention sets the static friction plate 422 on the second mounting seat 421, and only needs to select a wear-resistant material for the material of the static friction plate 422 without using a wear-resistant material as a whole, which can reduce costs. Of course, the second friction structure 42 can also include a second mounting seat 421, and the second mounting seat 421 has a static friction surface facing the first friction structure 41, and the static friction surface rubs against the first friction structure 41, so that the structure is relatively simple.

[0054] Preferably, the second friction structure 42 can be mounted on the axle 1 in a unidirectional manner, and the second friction structure 42 can rotate in the opposite direction to the first direction, but cannot rotate in the first direction. When the floor scrubber is pushed forward, the second friction structure 42 cannot rotate relative to the axle 1. At this time, the dynamic friction plate 412 and the static friction plate 422 are pressed tightly and have friction to limit the rotation of the dynamic friction plate 412. The dynamic friction plate 412 has a tendency to rotate with the roller body 2 because it is fastened to the inner ring of the volute spring 31. Due to the existence of end surface pressure, the dynamic friction plate 412 or the second friction structure 42 can transmit torque, so that the second mounting seat 421 also has a tendency to rotate with the roller body 2. The second friction structure 42 is unidirectionally mounted on the axle 1, which makes the second mounting seat 421 unable to rotate; when the roller body 2 continues to roll forward, the volute spring 31 is pressed against the static friction plate 422 and has friction to limit the rotation of the dynamic friction plate 412. The spring 31 continues to accumulate force and applies a continuously increasing resistance to the scrubber to hinder its forward movement, thereby reducing the traction force of the scrubber on the operator; when the force accumulated in the volute spring 31 is sufficient to overcome the friction between the dynamic friction plate 412 and the static friction plate 422, the first mounting seat 411 and the dynamic friction plate 412 begin to rotate with the roller body 2 and rotate relative to the second mounting seat 421 and the static friction force, and the volute spring 31 stops accumulating force when the accumulated force reaches the maximum value; when the scrubber continues to be pushed forward (the roller body 2 rotates in the first direction), the volute spring 31 always maintains the maximum accumulated force state and applies a constant resistance to the scrubber to hinder its forward movement. At this time, when the scrubber is pulled back (the roller body 2 rotates in the opposite direction of the first direction), the forward resistance of the spiral spring 31 to it will be converted into a continuously decreasing backward assist. When the spiral spring 31 is reduced to below the maximum value of the friction force between the static friction plate 422 and the dynamic friction plate 412, the dynamic friction plate 412 and the static friction plate 422 return to a relatively static state, and the first friction structure 41 and the second friction structure 42 maintain a tendency to rotate forward; if the scrubber continues to be pulled back, the accumulated force of the spiral spring 31 is released, and the spiral spring 31 begins to have a tendency to accumulate force in the reverse direction. Since the second friction structure 42 can rotate in the opposite direction to the first direction, if the scrubber continues to be pulled back at this time, the second friction structure 42, the first friction structure 41 and the spiral spring 31 will rotate together with the roller body 2, and the spiral spring 31 will not accumulate force, that is, the spiral spring 31 will not bring resistance or assist.

[0055] Since the roller brush of the floor scrubber has a large interference with the ground, a relatively large driving force consistent with the rotation direction of the roller brush is applied to the machine when the roller brush rotates. In order to improve the user experience, force can be stored only when the roller body 2 rotates forward, and the stored force can be released when the roller body 2 rotates reversely. That is, when the roller body 2 rotates reversely and the stored force of the spiral spring 31 is released, force will not continue to be stored even if the roller body 2 continues to rotate reversely.

[0056] In this embodiment, the second friction structure 42 is mounted on the axle 1 via a one-way ball bearing 81. More specifically, the outer ring of the one-way ball bearing 81 is engaged and fastened with the first mounting seat 411, and the inner ring of the one-way ball bearing 81 is fastened with the axle 1 via a flat key. The one-way ball bearing 81 can be provided so that the second friction structure 42 can only rotate in one direction around the axle 1.

[0057] In addition, the roller assembly 100 for cleaning equipment further includes a roller rubber coating 9 and other structures, which are not listed here one by one. The roller rubber coating 9 is arranged on the outer wall of the roller body 2.

[0058] Example 2

[0059] See also Figure 1 The present invention further provides a cleaning device 200, which includes the above-mentioned roller assembly 100 for cleaning devices. An embodiment of the cleaning device 200 includes an embodiment of the above-mentioned roller assembly 100 for cleaning devices. The beneficial effects of the above-mentioned roller assembly 100 for cleaning devices are also applicable to the cleaning device 200.

[0060] The cleaning device 200 may be a handheld scrubber, a handheld mop, a handheld washer-mop all-in-one, etc. It may also be other cleaning devices 200 equipped with the above-mentioned roller assembly, which will not be illustrated one by one here.

[0061] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the present invention.

Claims

1. A roller assembly for a cleaning device, characterized in that: include: axle; A roller body rotatably mounted on the wheel axle; A first elastic structure, one end of which is fixedly disposed on the roller body; and The friction structure comprises a first friction structure and a second friction structure, wherein the first friction structure is rotatably mounted on the wheel axle and fixedly arranged with the other end of the first elastic structure, and the second friction structure is fixed on the wheel axle and pressed against the first friction structure; Among them, when the roller body rotates along the first direction, it drives the other end of the first elastic structure to rotate, and the first friction structure and the second friction structure limit the movement of the other end of the first elastic structure under the action of mutual friction, so that the first elastic structure undergoes elastic deformation at least along the tangential direction of the roller body; when the roller body rotates in the opposite direction of the first direction, the elastic restoring force of the first elastic structure acts on the roller body, pushing the roller body to rotate in the opposite direction of the first direction.

2. The roller assembly for cleaning equipment according to claim 1, characterized in that: The first elastic structure is a spiral spring, the outer ring of the spiral spring is fixed to the inner wall of the roller body, and the inner ring of the spiral spring is fixed to the first friction structure.

3. The roller assembly for cleaning equipment according to claim 1 or 2, characterized in that: The first friction structure includes a first mounting seat and a dynamic friction plate. The first mounting seat is rotatably mounted on the wheel axle and fixed to the other end of the first elastic structure. The dynamic friction plate is mounted on the first mounting seat and pressed against the second friction structure.

4. The roller assembly for cleaning equipment according to claim 3, characterized in that: The dynamic friction plate is elastically pressed against the second friction structure.

5. The roller assembly for cleaning equipment according to claim 4, characterized in that: The roller assembly for the cleaning device also includes a second elastic structure and a locking structure, the second elastic structure and the locking structure are located on the side opposite to the first mounting seat and the second friction structure, the second elastic structure is arranged between the first mounting seat and the locking structure, and the locking structure is installed on the wheel axle.

6. The roller assembly for cleaning equipment according to claim 5, characterized in that: A first end cover is installed on the end surface of the axle body on the side opposite to the first friction structure, and the first end cover passes through the axle; The second elastic structure is located between the first end cover and the locking structure.

7. The roller assembly for cleaning equipment according to claim 1 or 2, characterized in that: The second friction structure is unidirectionally rotatably mounted on the wheel shaft. The second friction structure can rotate in the opposite direction to the first direction but cannot rotate in the first direction.

8. The roller assembly for cleaning equipment according to claim 7, characterized in that: The second friction structure is mounted on the wheel axle via a one-way ball bearing.

9. The roller assembly for a cleaning device according to claim 1, characterized in that: The second friction structure includes a second mounting seat and a static friction plate. The second mounting seat is mounted on the wheel axle. The static friction plate is mounted on the second mounting seat and is pressed against the first friction structure.

10. A cleaning device, characterized in that: The invention comprises a roller assembly for a cleaning device as claimed in any one of claims 1 to 9.

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