Reduction gearbox for side brush of sweeper

Abstract

The utility model relates to the technical field of sweepers, in particular to a reduction gearbox for a side brush of a sweeper. The output assembly comprises a cavity, a main gear arranged in the cavity, a first transmission assembly meshed with the main gear, a second transmission assembly in transmission connection with the first transmission assembly, an output piece arranged on the second transmission assembly and an inner gear ring arranged in the cavity and meshed with the first transmission assembly and the second transmission assembly. The first transmission assembly comprises a first planet carrier, a transmission gear arranged on one face of the first planet carrier, a first gear shaft arranged on the other face of the first planet carrier and a first planet wheel arranged on the first gear shaft. The second transmission assembly comprises a second planet carrier, an output shaft arranged on one face of the second planet carrier, a second gear shaft arranged on the other face of the second planet carrier and a second planet wheel arranged on the second gear shaft, the second planet wheel is in transmission connection with the transmission gear, and the main gear is in driving connection with the motor and is in transmission connection with the first planet wheel.

Description

Technical Field

[0001] This utility model relates to the field of sweeping machine technology, and in particular to a speed reduction gearbox for the side brush of a sweeping machine. Background Technology

[0002] A robotic vacuum cleaner is a smart cleaning appliance whose main function is to remove dust and debris from the floor through rotating brushes and a vacuum cleaner, effectively completing cleaning tasks such as sweeping, vacuuming, and mopping. It aims to reduce people's cleaning burden and improve their quality of life. The side brush is an important component of the robotic vacuum cleaner, usually installed at the front, lower part, or bottom of the machine. It is used to clean areas that the robot vacuum cleaner cannot directly reach, such as corners, edges of walls, and furniture edges. Its main function is to gather dust and debris to the suction port through rotation, thereby improving cleaning efficiency. The side brush gearbox, as a crucial component of the robotic vacuum cleaner, directly affects the cleaning effect due to its transmission efficiency. The gear set used in the side brush gearbox typically consists of an input gear, an intermediate gear set, and an output gear. Its complex structure and large footprint mean that improper assembly processes can lead to excessively large or small clearances between the gears, resulting in decreased transmission efficiency and affecting the normal operation of the side brush gearbox. This not only increases maintenance costs but also causes frequent malfunctions in the robotic vacuum cleaner. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing a gearbox for the side brush of a sweeping machine. It has a compact and reasonable structure, adopts a two-stage planetary structure, occupies little space, has a large torque capacity, and improves transmission efficiency and working performance.

[0004] To achieve the above objectives, this utility model provides a gearbox for a sweeper side brush, comprising an output assembly and a motor driven and connected to the output assembly. The output assembly includes a cavity, a main gear disposed in the cavity, a first transmission assembly meshing with the main gear, a second transmission assembly driven and connected to the first transmission assembly, an output component disposed in the second transmission assembly, and an internal gear ring disposed in the cavity and meshing with the first and second transmission assemblies. The first transmission assembly includes a first planetary carrier, a transmission gear disposed on one side of the first planetary carrier, a first gear shaft disposed on the other side of the first planetary carrier, and a first planetary gear disposed on the first gear shaft. The second transmission assembly includes a second planetary carrier, an output shaft disposed on one side of the second planetary carrier, a second gear shaft disposed on the other side of the second planetary carrier, and a second planetary gear disposed on the second gear shaft. The second planetary gear is driven and connected to the transmission gear. The main gear is driven and connected to the motor, and the main gear is driven and connected to the first planetary gear.

[0005] Preferably, the output component includes an output block, a locking screw disposed on the output block, and a spring plate disposed on the outside of the output block. The output shaft is provided with a screw hole. The locking screw passes through the spring plate and the output block in sequence and is threadedly connected to the screw hole. The output block is provided with a stop bar. The stop bar protrudes from the top wall and the bottom wall of the output block. The spring plate is sleeved on the outside of the output block so that the stop bar stops and abuts against the top wall and the bottom wall of the spring plate.

[0006] Preferably, the spring includes a first elastic arm and a second elastic arm integrally formed with the first elastic arm. A through hole is provided between the first elastic arm and the second elastic arm. The first elastic arm is provided with a first clamping head, and the second elastic arm is provided with a second clamping head. A first clamping groove and a second clamping groove are respectively provided on both sides of the output block. The first elastic arm is connected to the first clamping groove through the first clamping head, and the second elastic arm is connected to the second clamping groove through the second clamping head. A first limiting protrusion is provided on the outer wall of the first elastic arm, and a second limiting protrusion is provided on the outer wall of the second elastic arm.

[0007] Preferably, a bearing is provided at the connection between the cavity and the output shaft, and a retaining ring is provided between the bearing and the output shaft.

[0008] Preferably, the cavity is provided with an end cap for sealing the opening of the cavity. The end cap is provided with a connecting screw, the motor is provided with a connecting hole, the connecting screw passes through the end cap and connects to the connecting hole, the outer peripheral sidewall of the end cap is provided with a mounting screw, the outer wall of the cavity is provided with a mounting hole, and the mounting screw passes through the mounting hole and connects to the end cap.

[0009] Preferably, the cavity is provided with mounting ears, and there are three mounting ears arranged around the circumference of the cavity, with adjacent mounting ears arranged at an angle.

[0010] Preferably, both the first planetary gear and the second planetary gear are provided with an annular arc surface, which is arranged circumferentially around the end faces of the first planetary gear and the second planetary gear.

[0011] The beneficial effects of this utility model are: compact structure and reasonable design, adopting a two-stage planetary structure, occupying little space, bearing large torque, and improving transmission efficiency and working performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is an exploded structural diagram of the present invention.

[0014] Figure 3 This is a schematic diagram of the cavity structure of this utility model.

[0015] Figure 4 This is a schematic diagram of the first planetary gear structure of this utility model.

[0016] Figure 5 This is a schematic diagram of the output block structure of this utility model.

[0017] Figure 6 This is a schematic diagram of the spring sheet structure of this utility model.

[0018] The reference numerals in the figures include:

[0019] 1—Output Component; 11—Cavity; 12—Main Gear

[0020] 13—First transmission assembly; 131—First planetary carrier; 132—Transmission gear.

[0021] 133 – First gear shaft; 134 – First planetary gear

[0022] 14 – Second transmission assembly; 141 – Second planetary carrier; 142 – Output shaft

[0023] 143 – Second gear shaft; 144 – Second planetary gear; 145 – Screw hole

[0024] 15 - Output component; 151 - Output block; 1511 - Stop bar

[0025] 1512 – First clamping slot; 1513 – Second clamping slot

[0026] 152 - Locking screw

[0027] 153 – Shrapnel; 1531 – First Elastic Arm; 1532 – Second Elastic Arm

[0028] 1533 – Through hole; 1534 – First chuck mounting head; 1535 – Second chuck mounting head

[0029] 1536 - First limiting protrusion; 1537 - Second limiting protrusion

[0030] 16 – Internal gear ring; 17 – Bearing; 18 – Snap ring

[0031] 19—End cap; 191—Connecting screw; 192—Mounting screw

[0032] 110 – Mounting hole; 111 – Mounting lug; 112 – Annular arc surface

[0033] 2——Motor 21——Connection hole. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings.

[0035] like Figures 1 to 6 As shown, a reduction gearbox for a side brush of a sweeper according to this utility model includes an output component 1 and a motor 2 drivenly connected to the output component 1. The output component 1 includes a cavity 11, a main gear 12 disposed in the cavity 11, a first transmission component 13 meshing with the main gear 12, a second transmission component 14 drivingly connected to the first transmission component 13, an output component 15 disposed in the second transmission component 14, and an internal gear ring 16 disposed in the cavity 11 and meshing with the first transmission component 13 and the second transmission component 14. The first transmission component 13 includes a first planetary carrier 131 and a gear ring disposed on one side of the first planetary carrier 131. The transmission assembly 14 includes a second planetary carrier 141, an output shaft 142 on one side of the second planetary carrier 141, a second gear shaft 143 on the other side of the second planetary carrier 141, and a second planetary gear 144 on the second gear shaft 143. The second planetary gear 144 is connected to the transmission gear 132. The main gear 12 is connected to the motor 2 and is connected to the first planetary gear 134.

[0036] During operation, motor 2 drives main gear 12 to rotate. The rotating main gear 12 meshes with first planetary gear 134 for transmission. Since the first planetary gear 134 is mounted on the first gear shaft 133, it drives the first planetary carrier 131 to rotate. The rotating first planetary carrier 131 further drives the second planetary gear 144 to rotate via transmission gear 132. Since the second planetary gear 144 is mounted on the second gear shaft 143, it drives the second planetary carrier 141 to rotate. The rotating second planetary carrier 141 further drives the output component 15 via output shaft 142. The output component 15 rotates, connecting to the external side brush. Simultaneously, the first planetary gear 134 and the second planetary gear 144 mesh and rotate along the circumference of the internal gear ring 16. This, through the coordinated linkage between the first transmission component 13 and the second transmission component 14, drives the external side brush to rotate, providing a strong driving force. The side brush is typically made of nylon or rubber, and is elongated in shape, allowing it to flexibly conform to the edges of walls and furniture. Therefore, during operation, the side brush pushes dust and debris into the suction port of the dust box through its rotational motion. This utility model has a compact and reasonable structure, employing a two-stage planetary structure, occupying little space, bearing high torque, and improving transmission efficiency and working performance.

[0037] The output component 15 of this embodiment includes an output block 151, a locking screw 152 disposed on the output block 151, and a spring piece 153 disposed on the outside of the output block 151. The output shaft 142 is provided with a screw hole 145. The locking screw 152 passes through the spring piece 153 and the output block 151 in sequence and is threadedly connected to the screw hole 145. The output block 151 is provided with a stop bar 1511. The stop bar 1511 protrudes from the top wall and the bottom wall of the output block 151. The spring piece 153 is sleeved on the outside of the output block 151 so that the stop bar 1511 stops and abuts against the top wall and the bottom wall of the spring piece 153. Specifically, the output block 151 is made of plastic, which greatly reduces the manufacturing difficulty. At the same time, the use of plastic material reduces the weight and manufacturing cost of the output block 151, reduces the size and increases the service life. The locking screw 152 passes through the spring 153 and the output block 151 in sequence and is threaded into the screw hole 145, so that the output block 151 is connected and fixed on the output shaft 142. When the output shaft 142 rotates, it will drive the output block 151 to rotate together. The spring 153 is sleeved on the outside of the output block 151, so that the stop strip 1511 stops and abuts against the top and bottom walls of the spring 153, better engaging and fixing the spring 153 in the position of the output block 151. The elastic deformation of the spring 153 enhances the connection stability between the output block 151 and the external side brush.

[0038] The spring 153 in this embodiment includes a first elastic arm 1531 and a second elastic arm 1532 integrally formed with the first elastic arm 1531. A through hole 1533 is provided between the first elastic arm 1531 and the second elastic arm 1532. The first elastic arm 1531 is provided with a first clamping head 1534, and the second elastic arm 1532 is provided with a second clamping head 1535. A first clamping groove 1512 and a second clamping groove 1513 are respectively provided on both sides of the output block 151. The first elastic arm 1531 is connected to the first clamping groove 1512 through the first clamping head 1534, and the second elastic arm 1532 is connected to the second clamping groove 1513 through the second clamping head 1535. A first limiting protrusion 1536 is provided on the outer wall of the first elastic arm 1531, and a second limiting protrusion 1537 is provided on the outer wall of the second elastic arm 1532. Specifically, the first elastic arm 1531 and the second elastic arm 1532 are integrally formed into a C-shaped structure. The locking screw 152 passes through the through hole 1533. The first elastic arm 1531 is connected to the first clamping groove 1512 through the first clamping head 1534, and the second elastic arm 1532 is connected to the second clamping groove 1513 through the second clamping head 1535, thereby firmly engaging the spring piece 153 to the output block 151. The first limiting protrusion 1536 and the second limiting protrusion 1537 are used to stop the contact with the outer wall of the side brush, which has a good limiting effect and further improves the connection stability.

[0039] In this embodiment, a bearing 17 is provided at the connection between the cavity 11 and the output shaft 142, and a retaining spring 18 is provided between the bearing 17 and the output shaft 142. Specifically, the bearing 17 effectively supports the output shaft 142, reduces frictional resistance, and ensures the smooth rotation of the output shaft 142. The retaining spring 18 is fixed to the outside of the output shaft 142 by its own elastic force, preventing the output shaft 142 from accidentally falling off the bearing 17 due to axial movement during rotation, thus ensuring the working stability and reliability of the output shaft 142.

[0040] In this embodiment, the cavity 11 is provided with an end cap 19, which is used to seal the opening of the cavity 11. The end cap 19 is provided with a connecting screw 191, and the motor 2 is provided with a connecting hole 21. The connecting screw 191 passes through the end cap 19 and is connected to the connecting hole 21. The outer peripheral side wall of the end cap 19 is provided with a mounting screw 192, and the outer wall of the cavity 11 is provided with a mounting hole 110. The mounting screw 192 passes through the mounting hole 110 and is connected to the end cap 19. Specifically, the end cap 19 is connected to the opening of the cavity 11, and the connecting screw 191 passes through the end cap 19 and connects to the connecting hole 21, so that the end cap 19 is fixed to the motor 2. A sealing ring is provided between the output end of the motor 2 and the end cap 19, which greatly reduces the oil penetration of the gearbox into the interior of the motor 2, thereby reducing the failure rate of the motor 2. Preferably, four mounting holes 110 are provided, which are arranged circumferentially around the outer wall of the cavity 11. Four mounting screws 192 are provided, which pass through the four mounting holes 110 respectively and connect to the end cap 19, thereby realizing the connection and fixation of the end cap 19 to the cavity 11, and the connection is stable and reliable.

[0041] In this embodiment, the cavity 11 is provided with three mounting ears 111, which are arranged around the circumference of the cavity 11, with adjacent mounting ears 111 being inclined. Specifically, the three mounting ears 111 are arranged around the circumference of the cavity 11, with adjacent mounting ears 111 being inclined. This inclined structural design allows the side brush to form a certain angle with the bottom surface, achieving a more thorough cleaning effect.

[0042] In this embodiment, both the first planetary gear 134 and the second planetary gear 144 are provided with an annular arc surface 112, which is circumferentially arranged around the end faces of the first planetary gear 134 and the second planetary gear 144. Specifically, the annular arc surface 112 is circumferentially arranged around the end faces of the first planetary gear 134 and the second planetary gear 144. Due to the structural design of the annular arc surface 112, the traditional planar structure design and boss structure design are replaced, which greatly reduces the friction during rotation, improves transmission efficiency, and also reduces noise generation.

[0043] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A reduction gearbox for a sweeper side brush, characterized by: The output assembly comprises a cavity, a main gear arranged in the cavity, a first transmission assembly meshing with the main gear, a second transmission assembly in transmission connection with the first transmission assembly, an output member arranged in the second transmission assembly, and an inner ring gear arranged in the cavity and meshing with the first transmission assembly and the second transmission assembly, the first transmission assembly comprises a first planet carrier, a transmission gear arranged on one side of the first planet carrier, a first gear shaft arranged on the other side of the first planet carrier, and a first planet gear arranged on the first gear shaft, the second transmission assembly comprises a second planet carrier, an output shaft arranged on one side of the second planet carrier, a second gear shaft arranged on the other side of the second planet carrier, and a second planet gear arranged on the second gear shaft, the second planet gear is in transmission connection with the transmission gear, the main gear is in driving connection with the motor, and the main gear is in transmission connection with the first planet gear.

2. The reduction gearbox for side brush of a sweeping machine according to claim 1, characterized in that: The output member comprises an output block, a locking screw arranged on the output block, and a spring sheet arranged outside the output block, the output shaft is provided with a screw hole, the locking screw passes through the spring sheet, the output block and is in threaded connection with the screw hole in sequence, the output block is provided with a stop strip, the stop strip is protruded from the top wall and the bottom wall of the output block, and the spring sheet is sleeved outside the output block so that the stop strip abuts against the top wall and the bottom wall of the spring sheet.

3. The reduction gearbox for side brush of a sweeping machine according to claim 2, characterized in that: The spring sheet comprises a first elastic arm and a second elastic arm integrally formed with the first elastic arm, a through hole is arranged between the first elastic arm and the second elastic arm, the first elastic arm is provided with a first clamping head, the second elastic arm is provided with a second clamping head, the two sides of the output block are respectively provided with a first clamping groove and a second clamping groove, the first elastic arm is connected with the first clamping groove through the first clamping head, the second elastic arm is connected with the second clamping groove through the second clamping head, the outer wall of the first elastic arm is provided with a first limiting protrusion, and the outer wall of the second elastic arm is provided with a second limiting protrusion.

4. The reduction gearbox for side brush of a sweeping machine according to claim 1, characterized in that: A bearing is arranged at the connection between the cavity and the output shaft, and a circlip is arranged between the bearing and the output shaft.

5. The reduction gearbox for side brush of a sweeping machine according to claim 1, characterized in that: The cavity is provided with an end cover, the end cover is used for covering the opening of the cavity, the end cover is provided with a connecting screw, the motor is provided with a connecting hole, the connecting screw passes through the end cover and is connected with the connecting hole, the outer circumferential wall of the end cover is provided with a mounting screw, the outer wall of the cavity is provided with a mounting hole, and the mounting screw passes through the mounting hole and is connected with the end cover.

6. The reduction gearbox for side brushes of a sweeping machine according to claim 5, characterized in that: The cavity is provided with three mounting ears, the three mounting ears are arranged around the circumference of the cavity, and two adjacent mounting ears are arranged obliquely.

7. The reduction gearbox for side brush of a sweeping machine according to claim 1, characterized in that: The first planet gear and the second planet gear are both provided with an annular arc surface, and the annular arc surface is arranged around the end surface of the first planet gear and the second planet gear.

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