A directional carrying device for star wheel pull tooth production of new energy vehicles

Abstract

The application discloses a new energy automobile inner star wheel gear pulling production directional carrying device and relates to the technical field of gear transportation. The bottom end surface of the guide chassis is provided with a moving sliding groove, and the bottom end surface of the guide chassis is provided with a limiting sliding groove. The inner clamping block is clamped by the rotating disc linkage, the electric telescopic rod is reset when the extension arm is turned to a specific angle, the size difference between the clamping arm and the moving frame is matched to realize gear stripping, the contact crawler is driven to rotate by the driving wheel, the gear after cleaning is pushed, and the defects that the prior art uses the lifting clamping crawler for transportation, the system depends on a complex mechanism, the beats between processes are difficult to coordinate, and the overall transportation efficiency is low are made up.

Description

Technical Field

[0001] This invention relates to the field of gear transportation technology, and in particular to a directional transport device for the production of internal star gears in new energy vehicles. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the inner star wheel, as a core precision component of the transmission system, directly affects the power performance and operational stability of the entire vehicle through its machining accuracy and production efficiency. In the broaching process of the inner star wheel, after the workpiece is cut by the broaching machine, it needs to be quickly moved from the machining station to the cleaning station for degreasing treatment, and finally oriented and stacked to enter the next assembly process.

[0003] In the manufacturing of internal gears for new energy vehicles, existing technologies typically employ a set of independent external mechanical grippers. These grippers are driven by pneumatics or electric motors to radially clamp the gear from its outer circumference. After acquiring the workpiece, a multi-axis robotic arm or reciprocating slide moves it out of the narrow gear-pulling channel and places it on a long-distance conveyor belt. The belt's cyclical rolling transports the pulled gear to the cleaning device at the rear. However, existing gear handling devices generally transport gears by lifting and clamping the belt. This approach reveals significant drawbacks in practical applications. Because the system relies on a complex lifting mechanism and a long-distance clamping belt for relay operations, not only is it difficult to precisely coordinate the pace of each process, resulting in low overall transportation efficiency, but the entire system also involves a large number of power sources and high-precision electrical control components, leading to high initial investment and subsequent maintenance costs. Furthermore, this non-forced linkage logic, which relies on sensor signal chains, is highly susceptible to misalignment or workpiece drops in high-speed production if signal delays or sensor contamination occur. This fails to meet the dual requirements of inherent safety and high cost-effectiveness for modern production lines.

[0004] To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0005] The purpose of this invention is to achieve a shutter-like inward-expanding gripping mechanism by driving the slide plate and turntable with an electric telescopic rod and cooperating with the ring array clamping blocks. By utilizing the phase pre-release logic of the extension arm during the flipping process and combining it with the spatial dimension difference between the extension arm and the moving frame, the workpiece can be transferred without damage by its own weight. Through the physical interference between the drive wheel and the contact track, the forced coordination of cleaning and directional stacking is achieved. This overcomes the shortcomings of the existing technology, which generally uses lifting and clamping tracks to transport gears. This mode leads to obvious drawbacks in the practical application of the existing transportation device. Because the system relies on a complex lifting mechanism and long-distance clamping tracks for relay operation, it is difficult to accurately coordinate the rhythm between each process, resulting in low overall transportation efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a directional conveying device for the production of internal star wheel gears in new energy vehicles, comprising a gear broaching machine and a rotating base. The rotating base is fixedly installed on the bottom surface of the inner wall of the gear broaching machine. A rotating shaft is installed on the inner wall of the rotating base. An extension arm is installed on the outer surface of the rotating shaft. A reduction motor is installed on one side surface of the rotating base. An electric telescopic rod is installed on the inner wall of the extension arm. A thrust connecting rod plate is installed at the end of the electric telescopic rod. A protective plate is installed on the top surface of the extension arm. A clamping and conveying assembly is installed on the inner wall of the extension arm. A cleaning mechanism is installed on one side surface of the gear broaching machine.

[0007] The clamping and handling assembly includes a guide chassis, which is fixedly mounted on the bottom surface of the extension arm. A movable groove is formed on the bottom surface of the guide chassis, and a limiting groove is formed on the bottom surface of the guide chassis. A clamping block is slidably mounted on the inner wall of the limiting groove. A contact rubber is fixedly mounted on the outer surface of the clamping block. A follower pin is provided on the top surface of the clamping block. A drive turntable is mounted on the top surface of the guide chassis, and a linkage shaft is mounted on the top surface of the drive turntable. An inclined drive groove is provided on the bottom surface of the drive turntable.

[0008] Furthermore, the rotating shaft is rotatably connected to the rotating base, one end of the rotating shaft extends from the inner wall of the rotating base to its outer surface, the output end of the geared motor is fixedly connected to one end of the rotating shaft, one end of the electric telescopic rod is rotatably connected to the inner wall of the extension arm, and the extended end of the electric telescopic rod is rotatably connected to the thrust connecting rod plate.

[0009] Furthermore, the movable slide groove is three equidistantly distributed in a circular array on the bottom surface of the guide chassis, the limiting slide groove is six equidistantly distributed in a circular array on the bottom surface of the guide chassis, and the clamping block is three equidistantly distributed in a circular array on the bottom surface of the guide chassis. The clamping block is slidably connected to the guide chassis through the limiting slide groove, and each clamping block has corresponding contact rubber distributed on its outer surface.

[0010] Furthermore, each of the clamping blocks has a corresponding follower pin on its top surface, and the follower pin corresponds to a sliding groove. The follower pin is slidably connected to the inner wall of the sliding groove. The inclined drive groove consists of three grooves arranged in a ring array and equidistantly distributed on the bottom surface of the drive turntable. The inclined drive groove corresponds to a follower pin and is slidably connected to the follower pin. The linkage shaft is rotatably connected to the thrust connecting rod plate.

[0011] Furthermore, the cleaning mechanism includes a pushing assembly and a cleaning assembly. The cleaning assembly includes a cleaning chamber, which is installed on one side surface of the gear broaching machine. A movable frame is installed on the inner wall of the cleaning chamber, and a steam pipe is installed on the top surface of the cleaning chamber.

[0012] Furthermore, the steam pipe extends from the top surface of the cleaning chamber into its interior, and there are two movable frames, which are equidistantly distributed on the inner wall of the cleaning chamber.

[0013] Furthermore, the pushing assembly includes a mounting groove disposed on one side surface of the movable frame, a drive wheel rotatably mounted on the inner wall of the mounting groove, an extension shaft mounted on the inner wall of the drive wheel, a drive motor mounted on the top surface of the cleaning tank, and a contact track driven on the outer surface of the drive wheel.

[0014] Furthermore, the mounting slots are two respectively distributed on one side surface of the two movable frames, and the inner wall of each mounting slot has two corresponding drive wheels. The extension shaft extends from the inside of the cleaning tank to its top surface. The drive motors are two equidistantly distributed on the top surface of the cleaning tank, and the output end of the drive motor is fixedly connected to one end of the extension shaft.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] The mechanical linkage between the electric telescopic rod driving the slide plate and the turntable, combined with the ring array clamping blocks, achieves shutter-like inward expansion gripping. Utilizing the phase pre-release logic of the extended arm during the flipping process, combined with the spatial dimensional difference between the extension arm and the moving frame, the workpiece is transferred without damage due to its own weight. Through the physical interference between the drive wheel and the contact track, forced coordination of cleaning and directional stacking is achieved. This overcomes the shortcomings of existing technologies that typically transport gears by lifting and clamping tracks. This mode leads to obvious drawbacks in practical applications of existing transportation devices. Because this system relies on a complex lifting mechanism and long-distance clamping tracks for relay operations, not only is it difficult to accurately coordinate the rhythm between each process, but it also results in low overall transportation efficiency. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall external structure of the present invention is shown;

[0018] Figure 2 This invention is shown as a schematic diagram of its overall external structure from another angle.

[0019] Figure 3 A schematic diagram of the internal structure of the cleaning tank of the present invention is shown;

[0020] Figure 4A schematic diagram of the clamping and conveying assembly structure of the present invention is shown;

[0021] Figure 5 A schematic diagram of the internal structure of the clamping and conveying assembly of the present invention is shown;

[0022] Figure 6 This diagram shows the internal structure of the clamping and conveying assembly of the present invention from another angle;

[0023] Figure 7 A schematic diagram of the extension arm structure of the present invention is shown;

[0024] Figure 8 A schematic diagram of the structure of the present invention from another angle is shown;

[0025] Figure 9 A schematic diagram of the internal structure of the extension arm of the present invention is shown;

[0026] Figure 10 The present invention is shown. Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0027] Explanation of reference numerals in the attached drawings: 1. Gear broaching machine; 101. Rotating base; 102. Rotating shaft; 103. Extension arm; 104. Gear reducer motor; 105. Electric telescopic rod; 106. Thrust linkage plate; 107. Protective plate; 2. Guide chassis; 201. Moving slide; 202. Limiting slide; 203. Clamping block; 204. Contact rubber; 205. Follower pin; 206. Linkage shaft; 207. Inclined drive groove; 208. Drive turntable; 3. Cleaning box; 301. Moving frame; 302. Steam pipe; 4. Mounting groove; 401. Drive wheel; 402. Extension shaft; 403. Drive motor; 404. Contact track. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that, in the description of this invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Example 1 like Figures 1-10 As shown, a directional transport device for the production of internal gears in new energy vehicles includes a gear broaching machine 1 and a rotating base 101. The rotating base 101 is fixedly installed on the bottom surface of the inner wall of the gear broaching machine 1. A rotating shaft 102 is installed on the inner wall of the rotating base 101. An extension arm 103 is installed on the outer surface of the rotating shaft 102. A reduction motor 104 is installed on one side surface of the rotating base 101. An electric telescopic rod 105 is installed on the inner wall of the extension arm 103. A thrust connecting rod plate 106 is installed at the end of the electric telescopic rod 105. A protective plate 107 is installed on the top surface of the extension arm 103. A clamping and transporting assembly is installed on the inner wall of the extension arm 103. A cleaning mechanism is installed on one side surface of the gear broaching machine 1.

[0031] The clamping and handling assembly includes a guide chassis 2, which is fixedly mounted on the bottom surface of the extension arm 103. The bottom surface of the guide chassis 2 has a movable slide groove 201 and a limiting slide groove 202. A clamping block 203 is slidably mounted on the inner wall of the limiting slide groove 202. A contact rubber 204 is fixedly mounted on the outer surface of the clamping block 203. A follower pin 205 is provided on the top surface of the clamping block 203. A drive turntable 208 is mounted on the top surface of the guide chassis 2. A linkage shaft 206 is mounted on the top surface of the drive turntable 208. An inclined drive groove 207 is provided on the bottom surface of the drive turntable 208.

[0032] The rotating shaft 102 is rotatably connected to the rotating base 101. One end of the rotating shaft 102 extends from the inner wall of the rotating base 101 to its outer surface. The output end of the reduction motor 104 is fixedly connected to one end of the rotating shaft 102. One end of the electric telescopic rod 105 is rotatably connected to the inner wall of the extension arm 103. The extended end of the electric telescopic rod 105 is rotatably connected to the thrust connecting rod plate 106.

[0033] Example 2

[0034] like Figures 1-10As shown, the movable slide groove 201 consists of three equidistantly distributed in a circular array on the bottom surface of the guide chassis 2, the limiting slide groove 202 consists of six equidistantly distributed in a circular array on the bottom surface of the guide chassis 2, and the clamping block 203 consists of three equidistantly distributed in a circular array on the bottom surface of the guide chassis 2. The clamping block 203 is slidably connected to the guide chassis 2 through the limiting slide groove 202, and each clamping block 203 has a corresponding contact rubber 204 distributed on its outer surface.

[0035] Each clamping block 203 has a corresponding follower pin 205 distributed on its top surface. The follower pin 205 corresponds one-to-one with the moving slide 201. The follower pin 205 is slidably connected to the inner wall of the moving slide 201. The inclined drive grooves 207 are three in a ring array and are equidistantly distributed on the bottom surface of the drive turntable 208. The inclined drive grooves 207 correspond one-to-one with the follower pins 205. The inclined drive grooves 207 are slidably connected to the follower pins 205. The linkage shaft 206 is rotatably connected to the thrust connecting rod plate 106.

[0036] Example 3

[0037] like Figures 1-10 As shown, the cleaning mechanism includes a pushing assembly and a cleaning assembly. The cleaning assembly includes a cleaning chamber 3, which is mounted on one side surface of the gear broaching machine 1. A movable frame 301 is installed on the inner wall of the cleaning chamber 3, and a steam pipe 302 is installed on the top surface of the cleaning chamber 3. The steam pipe 302 extends from the top surface of the cleaning chamber 3 into its interior. There are two movable frames 301, which are equidistantly distributed on the inner wall of the cleaning chamber 3.

[0038] The pushing assembly includes a mounting groove 4, which is disposed on one side surface of the moving frame 301. A drive wheel 401 is rotatably mounted on the inner wall of the mounting groove 4. An extension shaft 402 is mounted on the inner wall of the drive wheel 401. A drive motor 403 is mounted on the top surface of the cleaning box 3. A contact track 404 is driven on the outer surface of the drive wheel 401.

[0039] The mounting slots 4 are two respectively distributed on one side surface of the two movable frames 301. Each mounting slot 4 has two drive wheels 401 correspondingly distributed on its inner wall. The extension shaft 402 extends from the inside of the cleaning box 3 to its top surface. The drive motors 403 are two equally spaced on the top surface of the cleaning box 3. The output end of the drive motor 403 is fixedly connected to one end of the extension shaft 402.

[0040] Specific usage process: When performing broaching and directional handling of the internal star wheel of a new energy vehicle, the entire handling actuator is first securely supported by the rotating base 101 fixedly installed on the bottom surface of the inner wall of the broaching machine 1. Before the operation begins, the reduction motor 104 installed on one side surface of the rotating base 101 is started. Since the rotating shaft 102 is rotatably connected to the rotating base 101, and one end of the shaft extends from the inner wall of the rotating base 101 to the outside and is fixedly connected to the output end of the reduction motor 104, when the reduction motor 104 rotates, it will drive the extension arm 103 installed on the outer surface of the rotating shaft 102 to rotate 180 degrees or a specific angle around the rotating shaft 102 as the fulcrum. After the angle is rotated to the correct position, the protective plate 107 on the top surface of the extension arm 103 acts as a physical barrier to prevent metal chips or oil mist generated during the broaching process from entering and interfering with the electric telescopic rod 105. When preparing to grip, the inner star wheel workpiece is positioned at the gripping station and ready to be gripped. At this time, the electric telescopic rod 105 installed on the inner wall of the extension arm 103 is activated. Since one end of the electric telescopic rod 105 is rotatably connected to the inner wall of the extension arm 103 and its extended end is rotatably connected to the thrust connecting rod plate 106, when it extends, it will push the thrust connecting rod plate 106 to undergo angular displacement around the linkage shaft 206. One end of the linkage shaft 206 is rotatably connected to the thrust connecting rod plate 106 and the other end is fixedly connected to the drive turntable 208, thereby realizing the synchronous linkage between the thrust connecting rod plate 106 and the drive turntable 208.

[0041] During the gripping phase, the electric telescopic rod 105 continuously pushes the thrust connecting rod plate 106 and the drive turntable 208, causing the three oblique drive grooves 207 arranged in a circular array on the bottom surface of the drive turntable 208 to rotate accordingly. Since the oblique drive grooves 207 are slidably connected to the follower pins 205 at the top of the gripping block 203, and the follower pins 205 correspond one-to-one with and are slidably connected to the movable slide grooves 201 installed on the bottom surface of the guide chassis 2, the rotation of the drive turntable 208 forces the follower pins 205 to drive the gripping block 203 to expand outward along the inner wall of the movable slide groove 201 and the limiting slide groove 202. As the gripping block 203 moves, the contact rubber 204 fixedly installed on the outer surface of the gripping block 203 gradually adheres to the inner wall of the inner star wheel and radially compresses it, thereby forming a rigid mechanical locking grip. After the gripping is completed, the operator or an external mechanism can drive the extension arm 103 to rotate in the opposite direction via the geared motor 104, so that the gripped inner star wheel disengages from the toothed station and moves towards the cleaning mechanism.

[0042] After rotating to the preset tilt angle of 120 to 150 degrees, the electric telescopic rod 105 performs a reset and retraction action. As the electric telescopic rod 105 resets, the thrust connecting rod plate 106 and the drive turntable 208 reverse, driving the clamping block 203 to retract along the moving slide 201 via the inclined drive groove 207, thereby releasing the clamping force on the inner wall of the inner star wheel. After the clamping block 203 is fully retracted, the inner star wheel is stably supported on the surface of the three clamping blocks 203 only by gravity. As the extension arm 103 continues to rotate and passes through the gap between the two moving frames 301 in the cleaning assembly, since the diameter of the inner star wheel is larger than the gap and the width of the extension arm 103 is smaller than the gap, the inner star wheel is blocked and peeled off by one side surface of the two moving frames 301, and accurately falls into the mounting groove 4 on the surface of the moving frame 301, ready to receive the steam cleaning operation.

[0043] When cleaning officially begins, the external steam supply system is activated, and high-temperature steam is continuously delivered to the internal chamber of the cleaning chamber 3 through the steam pipe 302 on the top surface of the cleaning chamber 3. The steam pipe 302 extends from the top surface of the cleaning chamber 3 into its interior, and the steam acts directly on the surface of the inner star wheel located in the mounting groove 4. Due to the high-temperature and high-pressure scouring effect of the steam, the viscosity of the residual cutting oil on the surface of the inner star wheel decreases instantly and is stripped off. At the same time, the two drive motors 403 fixed to the top surface of the cleaning chamber 3 are activated, and the output torque is transmitted to the drive wheel 401, which is rotated and mounted on the inner wall of the mounting groove 4, through the extension shaft 402. Since the outer surface of the drive wheel 401 is equipped with a contact track 404, the rotation of the drive wheel 401 drives the contact track 404 to circulate, thereby generating a frictional thrust on the outer surface of the inner star wheel in the mounting groove 4.

[0044] As the inner star wheel is continuously pushed forward by the equipment, the contact track 404 will first contact the inner star wheel and make it slide smoothly on the moving frame 301, ensuring that the residual liquid after cleaning is naturally drained by gravity during the movement. After steam cleaning, the inner star wheel then exits the cleaning chamber 3. Since the mounting slots 4 are two respectively distributed on one side surface of the two moving frames 301, and each mounting slot 4 corresponds to two drive wheels 401, this dual-side drive ensures the posture stability of the inner star wheel during the discharge process. Finally, after internal expansion gripping, 180-degree phase flipping, double plate gap peeling, and steam spray cleaning, the inner star wheel slides smoothly out of the end of the cleaning chamber 3 in an extremely clean state and is accurately and vertically fitted into the center of the preset transfer shaft. This effectively prevents the inner star wheel from losing precision due to oil residue in subsequent assembly processes, and significantly improves the production cycle and manufacturing quality of core transmission components for new energy vehicles.

[0045] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A directional conveying device for the production of internal gear broaching in new energy vehicles, comprising a broaching machine (1) and a rotating base (101), wherein the rotating base (101) is fixedly installed on the bottom surface of the inner wall of the broaching machine (1), characterized in that: A rotating shaft (102) is installed on the inner wall of the rotating base (101), an extension arm (103) is installed on the outer surface of the rotating shaft (102), a geared motor (104) is installed on one side surface of the rotating base (101), an electric telescopic rod (105) is installed on the inner wall of the extension arm (103), a thrust connecting rod plate (106) is installed at the end of the electric telescopic rod (105), a protective plate (107) is installed on the top surface of the extension arm (103), a clamping and handling assembly is installed on the inner wall of the extension arm (103), and a cleaning mechanism is installed on one side surface of the tooth broaching machine (1). The clamping and handling assembly includes a guide chassis (2), which is fixedly mounted on the bottom surface of the extension arm (103). The bottom surface of the guide chassis (2) is provided with a moving groove (201) and a limiting groove (202). A clamping block (203) is slidably mounted on the inner wall of the limiting groove (202). A contact rubber (204) is fixedly mounted on the outer surface of the clamping block (203). A follower pin (205) is provided on the top surface of the clamping block (203). A drive turntable (208) is mounted on the top surface of the guide chassis (2). A linkage shaft (206) is mounted on the top surface of the drive turntable (208). An oblique drive groove (207) is provided on the bottom surface of the drive turntable (208).

2. The directional conveying device for the production of internal star gears in new energy vehicles according to claim 1, characterized in that, The rotating shaft (102) is rotatably connected to the rotating base (101). One end of the rotating shaft (102) extends from the inner wall of the rotating base (101) to its outer surface. The output end of the geared motor (104) is fixedly connected to one end of the rotating shaft (102). One end of the electric telescopic rod (105) is rotatably connected to the inner wall of the extension arm (103). The extended end of the electric telescopic rod (105) is rotatably connected to the thrust connecting rod plate (106).

3. The directional conveying device for the production of internal star gears in new energy vehicles according to claim 1, characterized in that, The movable slide groove (201) consists of three equidistantly distributed in a circular array on the bottom surface of the guide chassis (2). The limiting slide groove (202) consists of six equidistantly distributed in a circular array on the bottom surface of the guide chassis (2). The clamping block (203) consists of three equidistantly distributed in a circular array on the bottom surface of the guide chassis (2). The clamping block (203) is slidably connected to the guide chassis (2) through the limiting slide groove (202). Each clamping block (203) has a corresponding contact rubber (204) distributed on its outer surface.

4. The directional conveying device for the production of internal star gears in new energy vehicles according to claim 1, characterized in that, Each clamping block (203) has a corresponding follower pin (205) distributed on its top surface. The follower pin (205) corresponds one-to-one with the moving slide (201). The follower pin (205) is slidably connected to the inner wall of the moving slide (201). The inclined drive groove (207) consists of three grooves arranged in a ring array and equidistantly distributed on the bottom surface of the drive turntable (208). The inclined drive groove (207) corresponds one-to-one with the follower pin (205). The inclined drive groove (207) is slidably connected to the follower pin (205). The linkage shaft (206) is rotatably connected to the thrust connecting rod plate (106).

5. The directional conveying device for the production of internal star gears in new energy vehicles according to claim 1, characterized in that, The cleaning mechanism includes a pushing component and a cleaning component. The cleaning component includes a cleaning chamber (3), which is installed on one side surface of the gear broaching machine (1). A movable frame (301) is installed on the inner wall of the cleaning chamber (3), and a steam pipe (302) is installed on the top surface of the cleaning chamber (3).

6. The directional conveying device for the production of internal star gears in new energy vehicles according to claim 5, characterized in that, The steam pipe (302) extends from the top surface of the cleaning chamber (3) into its interior. There are two movable frames (301), which are equidistantly distributed on the inner wall of the cleaning chamber (3).

7. The directional conveying device for the production of internal star gears in new energy vehicles according to claim 5, characterized in that, The pushing assembly includes a mounting groove (4), which is disposed on one side surface of the moving frame (301). A drive wheel (401) is rotatably mounted on the inner wall of the mounting groove (4), and an extension shaft (402) is mounted on the inner wall of the drive wheel (401). A drive motor (403) is mounted on the top surface of the cleaning box (3), and a contact track (404) is driven on the outer surface of the drive wheel (401).

8. The directional conveying device for the production of internal star gears in new energy vehicles according to claim 7, characterized in that, The mounting slots (4) are two respectively distributed on one side surface of the two movable frames (301). The inner wall of each mounting slot (4) has two drive wheels (401) correspondingly distributed. The extension shaft (402) extends from the inside of the cleaning box (3) to its top surface. The drive motors (403) are two equidistantly distributed on the top surface of the cleaning box (3). The output end of the drive motor (403) is fixedly connected to one end of the extension shaft (402).

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