Motor damping structure, rolling brush unit and transmission unit

Abstract

The utility model relates to the technical field of motor equipment, and provides a motor damping structure, a rolling brush unit and a transmission unit, the motor damping structure comprises a motor and a damper, the damper comprises an inner pipe, an outer pipe and a fastening mechanism, the outer pipe is movably sleeved outside the inner pipe, the fastening mechanism penetrates through the outer pipe to abut against the inner pipe, and the rolling brush unit is connected with the inner pipe. The outer pipe is fastened to the inner pipe, the inner pipe is connected to the output shaft of the motor in a sleeving mode, and when the resistance borne by the outer pipe is larger than a threshold value, the outer pipe rotates relative to the inner pipe. The utility model has the advantages that (1) through the arrangement of the damper, when a load part of the motor is clamped by a hand, the motor idles, the hand is prevented from being clamped, and the safety is improved; and (2) through the arrangement of the damper, when a load part of the motor is clamped, the motor idles, parts are prevented from being broken, the maintenance cost is reduced, the situation that the working efficiency of the underwater robot is low due to the fact that the parts are broken is also avoided, and meanwhile the service life of each part is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of motor equipment, and more specifically, to a motor damping structure, a roller brush unit and a transmission unit. Background Art

[0002] During use, swimming pools can be emptied of debris such as leaves, branches, sand, and household garbage, contaminating the pool and affecting water quality. Traditionally, pool cleaning is done manually, but this is time-consuming, labor-intensive, and costly. Currently, intelligent underwater robots (AUVs), also known as unmanned remotely operated vehicles (ROVs), are robots designed to operate underwater for extreme tasks. These robots utilize built-in filtration components and pumps to draw in pool water, filter out debris, and then drain the water, thereby cleaning the pool. Once cleaning is complete, the AUVs can return to the surface by climbing slopes or walls.

[0003] Pool robots usually use a drive motor to drive a roller brush for cleaning, or use a drive motor to drive gears and then drive other components to operate. The transmission between them is rigid. When your hand is stuck in the gap of the roller brush skin, the roller brush will still be forced to rotate with the motor drive, causing hand injuries and creating a safety hazard; and when the gear is stuck by foreign objects, the gear will also collapse under the forced drive of the motor, causing losses. Utility Model Content

[0004] The present invention aims to overcome at least one defect (shortcoming) of the above-mentioned prior art, and provides a motor damping structure, a roller brush unit and a transmission unit to improve safety.

[0005] The technical solution adopted by the present invention is to provide a motor damping structure, including a motor and a damper, the damper including an inner tube, an outer tube and a fastening mechanism, the outer tube is movably sleeved outside the inner tube, the fastening mechanism passes through the outer tube and abuts against the inner tube, fastening the outer tube to the inner tube, the inner tube is sleeved on the output shaft of the motor, and when the resistance experienced by the outer tube is greater than a threshold value, the outer tube rotates relative to the inner tube.

[0006] The motor is a conventional drive structure with an output shaft. The inner tube can be sleeved onto the output shaft in a variety of ways, as long as the two are securely connected. Preferably, the inner tube is installed on the motor's output shaft with an interference fit. The outer tube is used to connect to the load component driven by the motor.

[0007] The inner tube is rotatable relative to the outer tube. The fastening mechanism fixes the outer tube to the inner tube, and the fastening force of the outer tube on the inner tube is adjusted by adjusting the fastening mechanism. The threshold value described in this solution is affected by the fastening force.

[0008] Under normal circumstances, the outer tube and the inner tube are relatively stationary under the fastening of the fastening mechanism, the motor drives the damper to rotate, and the damper drives the load component driven by the motor to rotate. When the load component is stuck during rotation and encounters resistance, and the resistance is large, the outer tube rotates relative to the inner tube, causing the motor to drive the inner tube to idle. At this time, the load component is no longer forced to rotate. In this way, when the load component is stuck with a hand, the load component can be prevented from being forced to rotate and causing the hand to be pinched and injured; at the same time, it can also prevent the load component from being forced to rotate and causing itself to collapse and cause losses. Therefore, the motor damping structure of this solution can prevent the load component driven by the motor from pinching the hand, and even if the load component is accidentally touched, it will not be injured; in addition, the motor damping structure of this solution can reduce the probability of damage to the motor and its load component, save repair and maintenance costs, optimize the user experience, and extend its service life.

[0009] Furthermore, the outer wall of the outer tube is provided with a convex portion, the fastening mechanism passes through the convex portion and the outer wall of the outer tube to abut against the inner tube, and the fastening mechanism matches the convex portion.

[0010] The convex part and the wall of the outer tube are both provided with through holes for the fastening mechanism to pass through, and the number of fastening mechanisms matches that of convex parts. If the fastening mechanism is loose, the motor will run idle under normal circumstances, causing the load component to not be driven by the motor and affecting the operation. The length of the fastening mechanism is extended to increase the degree of fastening, and it is also convenient to adjust the degree of fastening of the outer tube on the inner tube. The provision of the convex part lengthens the length of the through hole, and with the extended fastening mechanism, the fastening mechanism is not easily affected by impact and interference from other objects when tightened, ensuring that it is not easy to loosen, so that the damper can operate normally. In addition, the provision of the convex part lengthens the length of the through hole without increasing the wall thickness of the outer tube, saving materials, reducing production costs, and reducing the weight of the damper, making it convenient for transportation and user movement.

[0011] Furthermore, the outer wall of the outer tube is provided with at least two convex portions, and a gap is provided between the inner tube and the outer tube.

[0012] The outer wall of the outer tube can include two, three, or four convex parts, etc., as long as the fastening mechanism can fasten the outer tube to the inner tube. The number of fastening mechanisms matches the number of convex parts. At the same time, due to the provision of multiple convex parts, the inner tube and the outer tube can be relatively fastened, and there is no need to increase the fastening force by friction between the inner tube and the outer tube. Therefore, a gap is provided between the inner tube and the outer tube to reduce the volume of the inner tube, reduce the overall weight, and make the overall structure compact. For manufacturers, it saves materials, saves production costs, and is more convenient for transportation; for users, the reduced weight makes it easier to move, optimizes the user experience, and because friction is avoided between the inner tube and the outer tube, the service life of the damper can be extended.

[0013] Furthermore, the outer wall of the outer tube is provided with a connecting piece, and the connecting piece is integrally connected to the outer wall of the outer tube.

[0014] The connecting piece is used to connect the load component. The connection through the connecting piece can increase the contact area between the outer tube and the load component, facilitate the installation of the load component, and improve the firmness of the connection. The integral connection of the connecting piece and the outer tube can further ensure the installation of the load component.

[0015] Furthermore, the upper portion of the inner tube protrudes from the outer tube.

[0016] The inner tube's upper portion protrudes beyond the outer tube, allowing it to be extended. This increases the contact area between the inner tube and the motor output shaft, making the connection more secure and preventing loosening of the inner tube and the motor from causing idling and affecting the normal operation of the motor damper. Furthermore, since only the inner tube needs to be extended, the outer tube does not need to be extended, thus saving material for the outer tube.

[0017] Furthermore, a gap is provided between the inner tube and the outer tube, and the outer wall of the inner tube has a convex ring, the top of the outer tube is provided with an inward convex edge, the convex edge overlaps the convex ring, and the fastening mechanism abuts against the outer wall of the inner tube.

[0018] The outer tube is overlapped with the convex ring through the convex edge, so that the outer tube and the inner tube are relatively fixed, which can facilitate the alignment of the holes when the fastening mechanism is installed, and also facilitate the removal of the fastening mechanism, thereby improving the installation efficiency. Specifically, the fastening mechanism abuts against the outer wall below the convex edge.

[0019] Furthermore, the cross section of the outer wall of the inner tube is circular, the convex ring is a circular ring, and the cross section of the inner wall of the outer tube is circular.

[0020] If the inner tube's outer wall were square, it would be caught by the fastening mechanism when rotating relative to the outer tube. However, the cylindrical outer wall allows the inner tube to rotate smoothly relative to the outer tube when the outer tube encounters significant resistance. This allows the motor to idle smoothly without getting stuck and causing damage, reducing maintenance costs and extending its service life. The circular shape of the raised ring and the cylindrical inner wall of the outer tube both match the shape of the inner tube's outer wall, allowing for smooth relative rotation between the inner and outer tubes.

[0021] Furthermore, the inner tube is made of stainless steel, and the outer tube is made of plastic.

[0022] The inner tube is directly connected to the motor output shaft. Stainless steel is stronger and more durable than plastic. Using stainless steel for the inner tube prevents it from breaking when the motor is idling. Using plastic for the outer tube can greatly reduce the overall weight, making the overall structure lighter.

[0023] Another object of the present utility model is to provide a roller brush unit, comprising a roller brush cylinder and a roller brush skin and also comprising any one of the above-mentioned motor damping structures, wherein the outer tube is connected to the roller brush cylinder, and the roller brush cylinder is externally connected to the roller brush skin.

[0024] In this technical solution, the roller brush barrel and roller brush cover are the load components of the motor. Under normal circumstances, the motor drives the inner tube, outer tube, roller brush barrel, and roller brush cover to rotate. When a hand touches the roller brush cover, it is stuck. The resistance on the outer tube exceeds a threshold, and the outer and inner tubes rotate relative to each other, causing the motor to drive the inner tube to idle. This prevents the roller brush cover from being forced to rotate by the motor, preventing hand pinching.

[0025] Another object of the present invention is to provide a transmission unit, comprising a driving gear and a driven gear, wherein the driving gear meshes with the driven gear, and is characterized in that it also comprises any one of the above-mentioned motor damping structures, wherein the driving gear is connected to the outer tube.

[0026] In this technical solution, the driving and driven gears are the load-bearing components of the motor. Under normal circumstances, the motor drives the inner tube, outer tube, driving gear, and driven gear to rotate together. If a foreign object gets stuck on the driven or driving gear, the resistance on the outer tube exceeds a threshold, causing the outer and inner tubes to rotate relative to each other, and the motor drives the inner tube to idle. This prevents the two gears from being forced to rotate by the motor, preventing gear or motor damage and reducing repair and maintenance costs.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] (1) By setting the damper, when the hand is stuck on the load component of the motor, the outer tube and the inner tube of the damper rotate relative to each other, and the motor drives the inner tube to rotate idly, preventing the load from being forced to rotate and causing the hand to be pinched, thereby improving safety.

[0029] (2) By setting the damper, when the load component of the motor is stuck, the motor will idle, preventing the parts from breaking, reducing the cost of repair and maintenance, and avoiding the low efficiency of the underwater robot caused by the breakage of the parts, while extending the service life of each part. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the overall structure of the damper of Example 1.

[0031] Figure 2 This is a cross-sectional view of the damper of Example 1.

[0032] Figure 3 Schematic diagram of the overall structure of the motor damping structure of Example 1.

[0033] Figure 4 This is a structural explosion diagram of the motor damping structure of Example 1.

[0034] Figure 5 This is a cross-sectional view of the motor damping structure of Example 1.

[0035] Figure 6 This is a schematic structural diagram of the inner tube convex ring of Example 1.

[0036] Figure 7 This is a schematic structural diagram of the outer tube flange of Example 1.

[0037] Figure 8 Schematic diagram of the motor damping structure with roller brush skin in Example 2.

[0038] Figure 9 It is a schematic diagram of the overall structure of the underwater robot in Example 4 and a schematic diagram of the structure of the roller brush skin in Example 2.

[0039] Reference numerals: motor 100 , output shaft 110 , inner tube 200 , convex ring 210 , outer tube 300 , convex portion 310 , connecting piece 320 , mounting hole 321 , convex edge 330 , fastening mechanism 400 , roller brush cylinder 500 , roller brush skin 510 . DETAILED DESCRIPTION

[0040] The drawings in this utility model are for illustrative purposes only and are not to be construed as limiting the scope of this utility model. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the products. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0041] Example 1

[0042] refer to Figures 1 to 5 This embodiment provides a motor damping structure, including a motor 100 and a damper, wherein the damper includes an inner tube 200, an outer tube 300 and a fastening mechanism 400, wherein the outer tube 300 is movably sleeved outside the inner tube 200, and the fastening mechanism 400 passes through the outer tube 300 and abuts against the inner tube 200, thereby fastening the outer tube 300 to the inner tube 200, and the inner tube 200 is sleeved on the output shaft 110 of the motor 100. When the resistance experienced by the outer tube 300 is greater than a threshold value, the outer tube 300 rotates relative to the inner tube 200.

[0043] Specifically, the inner wall of the inner tube 200 matches the shape of the output shaft 110 of the motor 100 , so that the output shaft 110 of the motor 100 can be connected and fixed to the inner tube 200 .

[0044] The motor 100 is a conventional drive structure including an output shaft 110. The inner tube 200 can be sleeved onto the output shaft 110 in a variety of ways, as long as the two are securely connected. Preferably, the inner tube 200 is installed on the output shaft 110 of the motor 100 with an interference fit. The outer tube 300 is used to connect to the load component driven by the motor 100.

[0045] The inner tube 200 can rotate relative to the outer tube 300. The fastening mechanism 400 fixes the outer tube 300 on the inner tube 200, and the fastening force of the outer tube 300 on the inner tube 200 is adjusted by adjusting the fastening mechanism 400. The resistance threshold described in this embodiment is affected by the fastening force.

[0046] Under normal circumstances, the outer tube 300 and the inner tube 200 are relatively stationary under the fastening of the fastening mechanism 400. The motor 100 drives the damper to rotate, and the damper drives the load component driven by the motor 100 to rotate. When the load component is stuck during rotation and encounters resistance, and the resistance is relatively large, the outer tube 300 rotates relative to the inner tube 200, causing the motor 100 to drive the inner tube 200 to idle. At this time, the load component is no longer forced to rotate. In this way, if the load component is stuck with a hand, the load component can be prevented from being forced to rotate and causing injury to the hand; at the same time, it can also prevent the load component from being forced to rotate and causing itself to collapse and cause damage. Therefore, the motor damping structure of this solution can prevent the load component driven by the motor 100 from pinching the hand, so that even if the load component is accidentally touched, it will not be injured. In addition, the motor damping structure of this solution can reduce the probability of damage to the motor 100 and its load component, save repair and maintenance costs, optimize the user experience, and at the same time extend its service life.

[0047] The outer wall of the outer tube 300 is provided with a protrusion 310. The fastening mechanism 400 passes through the protrusion 310 and the outer wall of the outer tube 300 to abut against the inner tube 200, and the fastening mechanism 400 matches the protrusion 310. The fastening mechanism 400 and the outer tube 300 can be connected by a threaded connection or an interference fit. Preferably, the fastening mechanism 400 and the outer tube 300 are connected by a threaded connection, the fastening mechanism 400 is a screw, and the inner wall of the through hole is provided with an internal thread that matches the screw.

[0048] Furthermore, the outer wall of the outer tube 300 is provided with at least two protrusions 310, and a gap is provided between the inner tube 200 and the outer tube 300. The number of protrusions 310 on the outer wall of the outer tube 300 can be two, three, or four, as long as the fastening mechanism 400 can secure the outer tube 300 to the inner tube 200. The number of fastening mechanisms 400 matches the number of protrusions 310. Preferably, there are two protrusions 310 and two fastening mechanisms 400, and the two protrusions 310 are arranged in a relative manner. This relative arrangement clamps the inner tube 200, thereby keeping it stationary relative to the outer tube 300. The provision of multiple protrusions 310 ensures that the inner tube 200 and the outer tube 300 are relatively fastened to each other, eliminating the need for friction between the inner tube 200 and the outer tube 300 to increase the fastening force. Therefore, the gap between the inner tube 200 and the outer tube 300 reduces the volume of the inner tube 200, reduces the overall weight, and makes the overall structure more compact. For manufacturers, it saves materials, reduces production costs, and is more convenient for transportation; for users, the reduced weight makes it easier to move, which optimizes the user experience, and since friction is avoided between the inner tube 200 and the outer tube 300, the service life of the damper can be extended.

[0049] The outer wall of the outer tube 300 is provided with a connecting piece 320, and the connecting piece 320 is integrally connected to the outer wall of the outer tube 300. The connecting piece 320 is used to connect the load component. The connection through the connecting piece 320 can increase the contact area between the outer tube 300 and the load component, facilitate the installation of the load component, and improve the firmness of the connection. The integral connection between the connecting piece 320 and the outer tube 300 can further make the installation of the load component more secure. Specifically, the connecting piece 320 is provided with a plurality of mounting holes 321 for mounting the load component. The connecting piece 320 can be one piece, two pieces or three pieces, preferably two pieces, and is arranged on the outer wall of the outer tube 300 avoiding the protrusion 310. The arrangement of two pieces can further increase the contact area between the outer tube 300 and the load component, and if one piece fails, the other piece can ensure that the load component is firmly connected, thereby ensuring the normal operation of the motor damping structure.

[0050] The upper portion of the inner tube 200 protrudes beyond the outer tube 300. This protrusion allows the inner tube 200 to be extended, thereby increasing the contact area between the inner tube 200 and the output shaft 110 of the motor 100. This strengthens the connection between the inner tube 200 and the output shaft 110 of the motor 100, preventing loosening of the inner tube 200 and the motor 100 from causing idling of the motor 100 and affecting the normal operation of the motor damper. Furthermore, since only the inner tube 200 needs to be extended, the outer tube 300 does not need to be extended, which also saves material for the outer tube 300.

[0051] refer to Figure 1 、 Figure 6 and Figure 7The outer wall of the inner tube 200 is provided with a convex ring 210, and the top of the outer tube 300 is provided with an inward convex edge 330. The convex edge 330 overlaps the convex ring 210, and the fastening mechanism 400 abuts against the outer wall of the inner tube 200. Specifically, the fastening mechanism 400 abuts against the outer wall below the convex edge 330. The outer tube 300 overlaps the convex ring 210 through the convex edge 330, so that the outer tube 300 and the inner tube 200 are relatively fixed. This facilitates the alignment of the holes during installation of the fastening mechanism 400 and also facilitates the removal of the fastening mechanism 400, thereby improving installation efficiency. The outer wall of the inner tube 200 has a circular cross-section, the convex ring 210 is a ring, and the inner wall of the outer tube 300 has a circular cross-section. The inner tube 200 is made of stainless steel, and the outer tube 300 is made of plastic.

[0052] If the outer wall of the inner tube 200 is a square cylinder, when the inner tube 200 rotates relative to the outer tube 300, the inner tube 200 will be stuck by the fastening mechanism 400. Therefore, the setting of the cylindrical outer wall allows the inner tube 200 to rotate smoothly relative to the outer tube 300 when the outer tube 300 is subjected to greater resistance, so that the motor 100 can smoothly idle and will not be stuck and cause damage, thereby reducing repair and maintenance costs and extending its service life. The convex ring 210 is a circular ring and the inner wall of the outer tube 300 is a cylindrical shape, which matches the shape of the outer wall of the inner tube 200, so that the relative rotation of the inner tube 200 and the outer tube 300 can proceed smoothly. Regarding the choice of material, the inner tube 200 is a structure directly connected to the output shaft 110 of the motor 100. Stainless steel is more durable than plastic. The use of stainless steel for the inner tube 200 can prevent the inner tube 200 from being easily damaged when the motor 100 drives the inner tube 200 to idle. The outer tube 300 is made of plastic, which can greatly reduce the overall weight and make the overall structure lighter.

[0053] Example 2

[0054] refer to Figure 8 and Figure 9 This embodiment provides a roller brush unit, including a roller brush cylinder 500 and a roller brush skin 510, and also includes the motor damping structure provided in Example 1. The outer tube 300 is connected to the roller brush cylinder 500, and the roller brush cylinder 500 is externally connected to the roller brush skin 510.

[0055] In this embodiment, the roller brush drum 500 and roller brush cover 510 are the load components of the motor 100. Under normal circumstances, the motor 100 drives the inner tube 200, outer tube 300, roller brush drum 500, and roller brush cover 510 to rotate. When a hand touches the roller brush cover 510, it is stuck, and the resistance on the outer tube 300 exceeds a threshold. The outer tube 300 and inner tube 200 rotate relative to each other, and the motor 100 drives the inner tube 200 to idle. This prevents the roller brush cover 510 from being forced to rotate by the motor 100, preventing hand pinching.

[0056] Example 3

[0057] This embodiment provides a transmission unit, including a driving gear and a driven gear, wherein the driving gear meshes with the driven gear, and further includes the motor damping structure provided in Example 1, wherein the driving gear is connected to the outer tube 300 .

[0058] In this embodiment, the driving gear and the driven gear are the load-bearing components of the motor 100. Under normal circumstances, the motor 100 drives the inner tube 200, the outer tube 300, the driving gear, and the driven gear to rotate together. If a foreign object becomes lodged in the driven gear or the driving gear, the resistance applied to the outer tube 300 exceeds a threshold, causing the outer tube 300 and the inner tube 200 to rotate relative to each other, and the motor 100 drives the inner tube 200 to idle. This prevents the two gears from being forced to rotate by the motor 100, preventing damage to the gears or the motor 100 and reducing repair and maintenance costs.

[0059] Example 4

[0060] refer to Figure 9 This embodiment provides an underwater robot, including an underwater robot body, the lower part of which is connected to the roller brush unit provided in Example 2 and / or the transmission unit provided in Example 3.

[0061] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A motor damping structure, characterized in that: The invention comprises a motor and a damper, wherein the damper comprises an inner tube, an outer tube and a fastening mechanism. The outer tube is movably sleeved on the outside of the inner tube. The fastening mechanism passes through the outer tube and abuts against the inner tube to fasten the outer tube to the inner tube. The inner tube is sleeved on the output shaft of the motor. When the resistance experienced by the outer tube is greater than a threshold value, the outer tube rotates relative to the inner tube.

2. The motor damping structure according to claim 1, characterized in that: The outer wall of the outer tube is provided with a convex portion, the fastening mechanism passes through the convex portion and the outer wall of the outer tube and abuts against the inner tube, and the fastening mechanism matches the convex portion.

3. The motor damping structure according to claim 2, characterized in that: The outer wall of the outer tube is provided with at least two convex parts, and a gap is provided between the inner tube and the outer tube.

4. The motor damping structure according to claim 1, characterized in that: The outer wall of the outer tube is provided with a connecting piece, and the connecting piece is integrally connected to the outer wall of the outer tube.

5. The motor damping structure according to claim 1, characterized in that: The upper portion of the inner tube protrudes from the outer tube.

6. The motor damping structure according to claim 1, characterized in that: A gap is provided between the inner tube and the outer tube, and the outer wall of the inner tube has a convex ring. The top of the outer tube is provided with an inward convex edge, the convex edge overlaps the convex ring, and the fastening mechanism abuts against the outer wall of the inner tube.

7. The motor damping structure according to claim 6, characterized in that: The cross section of the outer wall of the inner tube is circular, the convex ring is a circular ring, and the cross section of the inner wall of the outer tube is circular.

8. The motor damping structure according to any one of claims 1 to 7, characterized in that: The material of the inner tube is stainless steel, and the material of the outer tube is plastic.

9. A roller brush unit, comprising a roller brush barrel and a roller brush skin, characterized in that: It also includes the motor damping structure according to any one of claims 1 to 8, wherein the outer tube is connected to the roller brush cylinder, and the roller brush cylinder is externally connected to the roller brush skin.

10. A transmission unit comprising a driving gear and a driven gear, wherein the driving gear meshes with the driven gear, wherein: It also includes the motor damping structure according to any one of claims 1 to 8, wherein the driving gear is connected to the outer tube.

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