Hollow shaft motor and cleaning water circulating filtration scrubber using same

Abstract

The invention discloses a hollow shaft motor and a cleaning water circulating filtration scrubber using the same, and belongs to the technical field of hollow shaft motors. Provided is a hollow shaft motor. A hollow shaft is driven by an output shaft of a motor body. A cover body is arranged outside; a first connecting part and a second connecting part are arranged at two ends of the hollow shaft; the first connecting part is of a mechanical fixed connecting structure; the second connecting part is of a split type connector structure comprising a static ring part, a movable ring part and a pressing device. According to the invention, the hollow shaft is externally arranged, and the hollow shaft and the hollow shaft are not coaxial, so that the motor cannot be damaged even if water leaks from the occlusion part of the hollow shaft, power loss is avoided, and maintenance is convenient; a split type connector structure is adopted, through the contact type sealing design of the static ring part and the movable ring part and the introduction of the pressing device, relative rotation between the hollow shaft and external connection can be achieved, the sealing requirement can be met, and water leakage is effectively avoided; in the cleaning water circulating filtration scrubber applying the motor, a connecting water pipe is effectively prevented from being wound.

Description

Technical Field

[0001] The invention relates to a hollow shaft motor, in particular to a hollow shaft motor and a cleaning water circulation filtering floor scrubber using the motor, belonging to the technical field of hollow shaft motors. Background Art

[0002] In the overall development of the floor scrubber industry, the use of clean water circulation has always been a problem that needs to be solved in the industry at home and abroad. At present, for floor scrubber products, the amount of water determines the cleanliness of the ground during the cleaning process. In order to increase the water output of floor scrubber products and reduce the number of times of adding and draining water, and improve work efficiency, manufacturers can only increase the volume of the water tank to meet the demand. Increasing the water tank is equivalent to increasing the deadweight, which will cause the risk of damage to the ground. At the same time, it requires the cooperation of other power sources, and it is even more impossible to save water. Especially with the increasing development of automation and intelligent technology, in the cleaning field such as floor scrubbers, whether it is traditional cleaning or the development of unmanned automated cleaning robots, the key issue is the realization of a clean water filtration circulation system. If the use of circulating water is not realized, the cleaning robot will need to return to the workstation to add and drain water after working for about 20 minutes, and its working ability will be greatly reduced. It is also necessary to frequently clean the filter element, which wastes time, and cleaning the filter element requires more water, which is time-consuming and labor-intensive.

[0003] Regarding the filtration circulation of clean water, the prior art, such as Chinese patent publication No. CN116850785A, discloses a cleaning sewage circulation filtration device and an automatic driving floor scrubber using the device, and proposes two methods of rotating the filter element device or forming a vortex through a rotating water disc to achieve self-cleaning of the filter element, thereby achieving the effect of long-term water circulation.

[0004] However, in practical applications, it is found that the filtering effect of the rotating filter element device is higher than that of the vortex type, and the effect is better when the filter element device is placed at the bottom of the water tank. If the filter element device is placed at the top of the water tank, when the water volume in the water tank decreases to a certain extent, the filter element will partially not contact the sewage, resulting in the failure of the filtering effect. When the filter element device is placed at the bottom of the water tank, it is reasonable to connect the clean water pipe from the bottom of the water tank. If it is connected at the top, it will cause problems such as entanglement with the filter element.

[0005] At this time, the structural design needs to consider both the function of rotating the filter element device and sealing the water pipe connection. Therefore, the hollow shaft motor becomes an inevitable choice.

[0006] The existing hollow shaft motors are mostly designed with a through-type central shaft, and the central shaft is used for a variety of purposes: For example, publication number CN113904492A discloses a hollow shaft motor, in which the hollow design is used for shaft heat dissipation; for example, publication number CN102005855A discloses a hollow shaft motor, which provides a motor with a hollow central shaft and power output at both ends, and when the motor rotor is to rotate, the wires passing through the interior of the central shaft do not rotate with the rotation of the external rotor.

[0007] If one end of the central shaft is a rotating body and the other end is a non-rotating body, a rotary joint is required on the non-rotating body end. However, with this through-type central shaft design, when water flows through the central shaft, if the rotary joint is aged or leaks due to malfunction, water will flow into the motor from the outside of the shaft, thereby damaging the motor.

[0008] Therefore, in the technical field, there is an urgent need for a motor structure that can retain the central axis structure and avoid motor damage due to water leakage, and a clean water circulating filtering floor scrubber using the structure. Summary of the invention

[0009] The present invention mainly solves the above-mentioned technical problems and provides a hollow shaft motor and a clean water circulating filtering floor scrubber using the motor, which can provide rotational force for the filter element device and drain water from the bottom of the water tank at the same time.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions: A hollow shaft motor comprises a motor body and a hollow shaft; the hollow shaft is driven by the output shaft of the motor body, and the axis of the hollow shaft is not parallel to the axis of the output shaft of the motor body; a cover is provided outside the output shaft of the motor body and the hollow shaft; a first connecting part and a second connecting part which can be connected to the outside are provided at both ends of the hollow shaft; the first connecting part is a mechanically fixed connecting structure for transmitting rotational power to the outside; the second connecting part is a split joint structure for connecting to an external non-rotating end; the split joint structure comprises a static ring part, a dynamic ring part and a clamping device.

[0011] Preferably, the cover body includes an upper cover body and a lower cover body; the upper cover body is provided with a protrusion along the axial direction of the hollow shaft, and a hollow shaft bearing support is provided in the protrusion; the hollow shaft is connected to the cover body through a bearing sleeve; the lower cover body is provided with a first groove; and the static ring part is arranged in the first groove.

[0012] Preferably, the hollow shaft is provided with a second slot at the second connecting portion end; The inner wall of the first slot is provided with an axial long groove, and a hollow boss block is provided inside the first slot; a convex block is provided on the outer wall of the hollow boss block; the convex block is inserted into the long groove to form a sliding structure; an annular groove is provided on the top of the hollow boss block; The stationary ring portion includes a stationary ring block; the stationary ring block is arranged in the annular groove of the hollow boss block; The dynamic ring portion includes a dynamic ring block; the dynamic ring block is sleeved in the second slot and fixed by a pin structure; The clamping device comprises a first clamping spring; the first clamping spring is sleeved on the hollow boss block and is clamped by the first slot bottom of the lower cover body.

[0013] Preferably, a plurality of second compression springs are provided between the upper cover body and the lower cover body.

[0014] Preferably, the hollow shaft is fixedly sleeved with a first bevel gear; the output shaft of the motor body is fixedly sleeved with a second bevel gear; and the first bevel gear is meshed with the second bevel gear.

[0015] Preferably, the first connecting portion is a hollow boss shaft structure, and its cross section is a regular polygon.

[0016] Preferably, an annular groove is provided at the contact surface of the stationary ring block and the dynamic ring block, and a butt sealing ring is provided in the annular groove; the butt sealing ring is made of ceramic, alloy steel or graphene.

[0017] The present invention also provides a clean water circulating filtering floor scrubber using the hollow shaft motor, specifically: the hollow shaft motor is placed at the bottom end of the outer side of the water tank of the floor scrubber, the first connecting part is fixedly connected to the filtering device placed at the bottom of the water tank, and the water outlet of the filtering device is connected to the hollow shaft; the second connecting part is provided with a water outlet joint connected thereto, and the water outlet joint is connected to an external return water pipe.

[0018] The present invention provides a hollow shaft motor and a clean water circulation filtering floor scrubber using the motor, which has the following beneficial effects: 1. The hollow shaft motor adopts the structure design that the hollow shaft is externalized and the motor shaft and the hollow shaft are not coaxial. Even if the hollow shaft bites water, the motor will not be damaged, thus avoiding power loss and facilitating maintenance. 2. The split joint structure of the hollow shaft motor can realize the relative rotation between the hollow shaft and the external connection and meet the sealing requirements, effectively avoiding water leakage, through the joint design of the static ring part and the dynamic ring part and the reference of the auxiliary and clamping device; 3. The clean water circulation filtering floor scrubber using the hollow shaft motor can realize that the filtering device is arranged at the bottom of the water tank, and is connected to the clean water return pipe through the downward drainage method, thus avoiding the problem of rotation and entanglement of the return pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation modes of the present invention or the technical solutions in the prior art, the drawings required for use in the description of the implementation modes or the prior art are briefly introduced below.

[0020] Figure 1A schematic diagram of the overall structure of the hollow shaft motor provided by the present invention; Figure 2 This is a schematic diagram of the disassembled structure of the hollow shaft motor of the present invention; Figure 3 This is a schematic diagram of the cover structure of the present invention; Figure 4 This is a schematic diagram of the hollow shaft structure of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the components in the lower cover of the present invention; Figure 6 This is a schematic diagram of the installation structure of the moving ring block and the hollow shaft of the present invention; Figure 7 A schematic diagram of the disassembled structure of a hollow shaft motor provided in Example 2 of the present invention; Figure 8 This is a schematic diagram of the application of the hollow shaft motor provided by the present invention in a clean water circulating filtering floor scrubber.

[0021] Legend: 1-motor body; 2-hollow shaft; 21-second slot; 3-cover; 31-upper cover; 32-lower cover; 321-first slot; 4-first connecting part; 6-protrusion; 11-static ring block; 12-dynamic ring block; 13-first clamping spring; 14-hollow boss block; 141-protrusion; 15-annular groove; 33-water outlet joint; 34-second clamping spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1, see Figure 1 A hollow shaft motor comprises a motor body 1 and a hollow shaft 2; the hollow shaft 2 is driven by the output shaft of the motor body 1, and the axis of the hollow shaft 2 and the output shaft of the motor body 1 are not parallel; the hollow shaft 2 is fixedly sleeved with a first bevel gear; the output shaft of the motor body 1 is fixedly sleeved with a second bevel gear; the first bevel gear is meshed with the second bevel gear, and the angle between the hollow shaft 2 and the axis of the output shaft of the motor body 1 is 90°; a cover 3 is provided outside the output shaft of the motor body 1 and the hollow shaft 2; See also Figure 2, a first connection part 4 and a second connection part which can be communicated with the outside are provided at both ends of the hollow shaft 2; the first connection part 4 is a mechanical fixed connection structure, specifically a hollow boss shaft structure with a regular quadrilateral cross section, which is used to transmit rotational power to the outside; the second connection part is a split joint structure, which is used to connect with the external non-rotating end, and the split joint structure includes a static ring part, a dynamic ring part and a clamping device; See also Figure 3 In this embodiment, the cover body 3 includes an upper cover body 31 and a lower cover body 32; the upper cover body 31 is provided with a protrusion 6 along the axial direction of the hollow shaft 2, and a hollow shaft bearing support is provided in the protrusion 6; the hollow shaft 2 is connected to the cover body 3 through a bearing sleeve; the lower cover body 32 is provided with a first groove 321; the static ring part is arranged in the first groove 321.

[0024] See also Figure 4 In this embodiment, the hollow shaft 2 is provided with a second slot 21 at the second connecting portion end; see Figure 5 The inner wall of the first slot 321 of the lower cover body 32 is provided with an axial long groove, and a hollow boss block 14 is provided inside the first slot 321; the outer wall of the hollow boss block 14 is provided with a boss 141; the boss 141 is inserted into the long groove to form a sliding structure; the top of the hollow boss block 14 is provided with an annular groove 15, and the bottom of the hollow boss block 14 can be connected to an external water pipe; The stationary ring portion includes a stationary ring block 11; the stationary ring block 11 is arranged in the annular groove 15 of the hollow boss block 14; See also Figure 6 The moving ring portion includes a moving ring block 12; the moving ring block 12 is sleeved in the second slot 21 and fixed by a pin structure to prevent the moving ring block 12 and the hollow shaft 2 from rotating relative to each other, thereby avoiding water leakage and air leakage; The clamping device comprises a first clamping spring 13 ; the first clamping spring 13 is sleeved on the hollow boss block 14 and is clamped by the bottom of the first slot 321 of the lower cover 32 .

[0025] Furthermore, annular grooves are provided at the contact surfaces of the stationary ring block 11 and the dynamic ring block 12, and butt sealing rings are provided in the annular grooves; the butt sealing rings are made of ceramic, alloy steel or graphene.

[0026] The working principle of the hollow shaft motor provided in this embodiment is as follows: Driven by the motor body 1, the hollow shaft 2 rotates, and the dynamic ring block 12 arranged at the second connecting part is non-fixedly connected with the static ring block 11 arranged in the hollow boss block 14. On the basis of ensuring the upper and lower connections, the first connecting part 4 outputs a rotating force while the second connecting part is stationary. In order to ensure the continuous contact between the dynamic ring block 12 and the static ring block 11, a clamping device is introduced. When the upper cover body 31 and the lower cover body 32 are bolted together, the first clamping spring 13 arranged in the lower cover body 32 provides a reverse clamping force for the static ring block 11, thereby avoiding water leakage caused by the loose contact between the dynamic ring block 12 and the static ring block 11.

[0027] Example 2, see Figure 7 This embodiment provides a hollow shaft motor, and a plurality of second compression springs 34 are further provided between the upper cover 31 and the lower cover 32. At this time, there is a gap between the upper cover 31 and the lower cover 32 connected by bolts, and the second compression springs 34 are in an incompletely compressed state during installation.

[0028] This embodiment is to prevent the hollow shaft motor from being worn out due to the dynamic ring block 12 and the static ring block 11 after long-term use, and the first compression spring 13 is underpressured, by continuing to tighten the connecting bolts between the upper and lower covers to compress the second compression spring 34, so that the lower cover 32 can continue to provide reverse pressure for the static ring block 11, thereby ensuring the seal between the dynamic ring block 12 and the static ring block 11. The direct function of the second compression spring 34 is to provide a compression stroke for the lower cover 32.

[0029] Example 3, see Figure 8 A clean water circulating filtering floor scrubber using a hollow shaft motor, specifically: any hollow shaft motor in the above embodiments is placed at the bottom end of the outer side of the water tank of the floor scrubber, the first connecting part 4 is fixedly connected to the filtering device placed at the bottom of the water tank, and the water outlet of the filtering device is connected to the hollow shaft 2; the hollow boss block 14 placed in the second connecting part is connected to the external return water pipe through the water outlet joint 33.

[0030] The working principle of this embodiment is as follows: the filter device is powered by the hollow shaft motor for forward and reverse rotation. Under the action of the water suction pump in the external water return pipe, the filtered clean water flows in from the first connection part 4, flows through the hollow shaft 2, and then flows out from the hollow boss block 14 in the second connection part through the water outlet joint 33 to the water return pipe, and finally flows back to the water tank. The hollow shaft motor provides power for the filter device while realizing the drainage function, and effectively avoids water leakage or damage to the motor caused by water leakage.

[0031] It should be noted that the hollow shaft motor provided by the present invention can be used not only in floor scrubbers, but also in car washes and other scenes where clean water needs to be filtered and circulated; it can also be used in other filtering non-circulation scenes to achieve residue and juice separation.

[0032] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hollow shaft motor, comprising a motor body (1), characterized in that: The invention also comprises a hollow shaft (2), wherein the hollow shaft (2) is driven by the output shaft of the motor body (1), and the axis of the hollow shaft (2) is not parallel to the axis of the output shaft of the motor body (1); a cover body (3) is provided outside the output shaft of the motor body (1) and the hollow shaft (2); a first connection part (4) and a second connection part which can be communicated with the outside are provided at both ends of the hollow shaft (2); the first connection part (4) is a mechanical fixed connection structure; the second connection part is a split joint structure; the split joint structure comprises a static ring part, a dynamic ring part and a clamping device.

2. A hollow shaft motor according to claim 1, characterized in that: The cover body (3) comprises an upper cover body (31) and a lower cover body (32); the upper cover body (31) is provided with a protrusion (6) along the axial direction of the hollow shaft (2), and a hollow shaft bearing support is provided in the protrusion (6); the hollow shaft (2) is sleeved in the cover body (3) via a bearing; the lower cover body (32) is provided with a first slot (321); and the stationary ring portion is arranged in the first slot (321).

3. A hollow shaft motor according to claim 2, characterized in that: The hollow shaft (2) is provided with a second slot (21) at the second connecting portion end; The inner wall of the first slot (321) is provided with an axial long groove, and a hollow boss block (14) is provided inside the first slot (321); the outer wall of the hollow boss block (14) is provided with a convex block (141); the convex block (141) is inserted into the long groove to form a sliding structure; the top of the hollow boss block (14) is provided with an annular groove (15); The stationary ring portion comprises a stationary ring block (11); the stationary ring block (11) is arranged in an annular groove (15) of the hollow boss block (14); The dynamic ring portion comprises a dynamic ring block (12); the dynamic ring block (12) is sleeved in the second slot (21) and fixed by a pin structure; The clamping device comprises a first clamping spring (13); the first clamping spring (13) is sleeved on the hollow boss block (14) and is clamped by the bottom of the first slot (321) of the lower cover body (32).

4. A hollow shaft motor according to claim 2, characterized in that: A plurality of second compression springs (34) are provided between the upper cover body (31) and the lower cover body (32).

5. The hollow shaft motor according to claim 1, characterized in that: The hollow shaft (2) is fixedly sleeved with a first bevel gear; the output shaft of the motor body (1) is fixedly sleeved with a second bevel gear; the first bevel gear is meshed with the second bevel gear.

6. The hollow shaft motor according to claim 1, characterized in that: The first connecting portion (4) is a hollow boss shaft structure, and its cross section is a regular polygon.

7. The hollow shaft motor according to claim 3, characterized in that: The contact surfaces of the stationary ring block (11) and the dynamic ring block (12) are both provided with an annular groove, and a butt sealing ring is provided in each of the annular grooves; the butt sealing ring is made of a material of ceramic, alloy steel or graphene.

8. A cleaning water circulation filtering floor scrubber using the hollow shaft motor according to any one of claims 1 to 7, characterized in that: The hollow shaft motor is placed at the bottom end of the outer side of the water tank of the floor scrubber; the first connection portion (4) is fixedly connected to a filter device placed at the bottom of the water tank; the water outlet of the filter device is connected to the hollow shaft (2); the second connection portion is provided with a water outlet joint (33) connected thereto; the water outlet joint (33) is connected to an external water return pipe.

Images