A cleaning device for an automotive sunroof

Abstract

This invention relates to the field of automotive sunroof cleaning technology and discloses a cleaning device for automotive sunroofs, including a support base and a movable base. Multiple rotary joints are fixedly mounted on the top of the movable base, and a hollow cleaning rod is rotatably mounted on the bottom of each rotary joint. A cleaning box that normally swings downwards is rotatably mounted on the bottom of the cleaning rod. The cleaning box has two cavities separated by a partition plate. This invention features an elastic hinge structure consisting of a rotating shaft and a torsion spring between the bottom of the cleaning rod and the cleaning box. Each cleaning box floats independently, and the contact pressure is automatically balanced by the torsion spring preload and the glass reaction force. When the sunroof glass is curved, each cleaning box automatically adjusts its swing angle according to the curvature of the glass surface. The cleaning box in the center has a smaller swing angle, while the cleaning boxes at the edges have a larger swing angle. All soft bristles are evenly adhered to the glass surface with constant pressure.

Description

Technical Field

[0001] This invention relates to the field of automotive sunroof cleaning technology, specifically a cleaning device for automotive sunroofs. Background Technology

[0002] As an important feature of modern passenger vehicles, the outer surface of the car sunroof is exposed to the outdoor environment for a long time, which easily accumulates pollutants such as dust, tree sap, bird droppings, oil film and industrial dust. The decrease in light transmittance not only affects the driver's and passengers' vision and lighting experience, but the long-term adhesion of pollutants can also corrode the sealing strips at the edge of the sunroof glass and shorten the life of the sunroof. Currently, car sunroofs are mainly cleaned manually by wiping with a wet towel or sponge, or by rinsing with a high-pressure water gun. However, these methods have the following problems in actual use: manual wiping requires operators to climb onto the roof or work with their arms outstretched for extended periods, which is labor-intensive and difficult to cover the front area of ​​the sunroof due to height limitations; during wiping, wastewater can easily flow down the arm onto the car body and the passenger compartment; the moisture content of the towel is difficult to control, as it is too dry and the cleaning is not thorough, while too wet and obvious water stains are left; high-pressure water gun rinsing requires the vehicle to be driven into a car wash bay, making it impossible to clean quickly at any time; the high-pressure water flow can easily break through the sunroof edge seals and enter the guide rail mechanism, diluting the lubricant and causing abnormal noises or even jamming when the sunroof opens and closes; after the water flows down the roof, the entire vehicle needs to be wiped, resulting in serious waste of water resources. Summary of the Invention

[0003] The purpose of this invention is to provide a cleaning device for car sunroofs that has the effect of self-adaptive fitting and preventing water splashing and leakage.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a cleaning device for a car sunroof, comprising a support base and a movable base, wherein a plurality of rotary joints are fixedly provided at the top of the movable base, a hollow cleaning rod is rotatably provided at the bottom of the rotary joints, a cleaning box that swings downward normally is rotatably provided at the bottom of the cleaning rod, the cleaning box has two cavities inside through a partition plate, and the surface of the partition plate is provided with water passage holes, a top cover is fixedly provided at the top of the cleaning box, and a water outlet hose communicating with the cleaning rod and the upper cavity is provided on the surface of the top cover, a capillary absorbent fiber bundle passes through the bottom of the cleaning box, and a rotary drive component is provided on one side of the movable base.

[0005] A further feature of the present invention is that: four support seats are provided, adjacent support seats are fixedly connected by reinforcing rods, a support column is fixedly provided at the bottom end of the support seat, and a suction cup is fixedly provided at the bottom end of the support column.

[0006] A further configuration of the present invention is as follows: a fixing plate is fixedly provided at the top of the support base; an adjusting screw is rotatably provided between two fixing plates on the same side; a guide rod is fixedly provided between two fixing plates on the other side; a connecting seat threadedly connected to the adjusting screw is fixedly provided on one side of the movable base; and a guide seat that slides with the guide rod is fixedly provided on the other side of the movable base.

[0007] A further configuration of the present invention is as follows: a motor frame is fixedly mounted on one side of one of the fixed plates, a drive motor is fixedly mounted on one side of the motor frame, and the transmission shaft of the drive motor is fixedly connected to one end of the adjusting screw.

[0008] A further feature of the present invention is that a branch pipe is installed on the top of the rotary joint, a water inlet pipe is fixedly provided at the top of the multiple branch pipes, and a water inlet hose is provided in the middle of one side of the water inlet pipe.

[0009] A further feature of the present invention is that: a mounting base is fixedly provided at the bottom end of the cleaning rod, and a rotating base is fixedly provided at the top end of the upper cover; the rotating base is rotatably connected to the mounting base via a rotating shaft; and a torsion spring is sleeved on the surface of the rotating shaft so that the cleaning box is normally in a downward swinging state.

[0010] A further configuration of the present invention is as follows: the rotary drive component includes a plurality of mounting plates corresponding to the cleaning rod; the bottom of the mounting plate is rotatably provided with a mounting shaft; one end of the mounting shaft is fixedly provided with a bevel gear two; the other end of the mounting shaft is fixedly provided with a bevel gear three; two mounting brackets are fixedly provided on one side of the movable seat; a fixed shaft is rotatably provided between the two mounting brackets; a bevel gear four is fixedly provided on the surface of the fixed shaft and meshes with bevel gear three; and a bevel gear one is fixedly provided at the bottom of the cleaning rod and meshes with bevel gear two.

[0011] A further configuration of the present invention is as follows: a motor frame two is fixedly provided on one side of one of the mounting brackets, a drive motor two is fixedly provided on one side of the motor frame two, and the transmission shaft of the drive motor two is connected to one end of the fixed shaft.

[0012] In summary, the present invention has the following beneficial effects: 1. An elastic hinge structure consisting of a rotating shaft and a torsion spring is set between the bottom of the cleaning rod and the cleaning box. Each cleaning box floats independently. The contact pressure is automatically balanced by the preload of the torsion spring and the reaction force of the glass. When the sunroof glass is curved, each cleaning box automatically adjusts its swing angle according to the curvature of the glass surface. The swing angle of the cleaning box in the center position is small and the swing angle of the cleaning box at the edge position is large. All soft bristles are evenly attached to the glass surface with constant pressure. 2. A capillary fiber bundle is installed through the bottom plate of the cleaning box. The capillary wicking effect of the fiber bundle slowly and evenly conducts water to the tip of the soft bristles. The water supply method is changed from "spraying and rinsing" to "penetrating wetting". The tip of the bristles is always saturated with moisture, but there is no free water. This completely prevents water from seeping into the cockpit and guide rail mechanism along the edge of the sunroof, protecting the sunroof lubrication system and interior parts. Attached Figure Description

[0013] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention; Figure 2 This is the second three-dimensional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the movable base of the present invention; Figure 4 This is a schematic diagram of the cleaning box and cleaning rod of the present invention; Figure 5 This is an exploded view of the cleaning box of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the cross-sectional structure.

[0014] In the diagram: 1. Support base; 101. Reinforcing rod; 102. Support column; 103. Suction cup; 104. Fixing plate; 105. Guide rod; 106. Adjusting screw; 107. Motor frame one; 108. Drive motor one; 2. Moving base; 201. Connecting base; 202. Guide base; 203. Rotary joint; 204. Water inlet pipe; 205. Branch pipe; 206. Water inlet hose; 3. Cleaning rod; 301. Mounting base; 302. Water outlet hose; 303. Cleaning box; 304. Top cover; 305. Rotating seat; 306. Rotating shaft; 307. Divider plate; 308. Water passage hole; 309. Capillary absorbent fiber bundle; 3010. Bevel gear one; 3011. Mounting plate; 3012. Mounting shaft; 3013. Bevel gear two; 3014. Bevel gear three; 3015. Mounting bracket; 3016. Fixed shaft; 3017. Bevel gear four; 3018. Motor frame two; 3019. Drive motor two. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0016] Please see Figures 1-6 In this embodiment of the invention, a cleaning device for a car sunroof includes a support base 1, a movable base 2, a cleaning rod 3, a cleaning box 303, and a rotation drive component.

[0017] Four support bases 1 are provided, arranged in a rectangular shape at the four corners. Adjacent support bases 1 are fixedly connected by reinforcing rods 101 to form a stable rectangular support frame. A support column 102 is fixedly provided at the bottom end of each support base 1, and a suction cup 103 is fixedly provided at the bottom end of each support column 102 for temporarily adsorbing and fixing the device to a flat part of the car roof or sunroof edge.

[0018] The movable seat 2 is located above the space enclosed by the support seat 1 and can reciprocate in the front-back direction under the action of the drive mechanism. The top of the movable seat 2 is fixedly provided with multiple rotary joints 203. The rotary joints 203 are arranged in a row at intervals along the length of the movable seat 2. The bottom of each rotary joint 203 is rotatably provided with a hollow cleaning rod 3. The bottom end of the cleaning rod 3 is rotatably provided with a cleaning box 303 through an elastic hinge structure. Under normal conditions, the cleaning box 303 maintains a downward swinging tendency under the action of the elastic element.

[0019] A fixing plate 104 is fixedly provided at the top of the support base 1, and an adjusting screw 106 is rotatably provided between the two fixing plates 104 on the same side; a guide rod 105 is fixedly provided between the two fixing plates 104 on the other side; that is, the adjusting screw 106 and the guide rod 105 are arranged in parallel and are located on both sides of the movable base 2 respectively.

[0020] One side of the movable seat 2 is fixedly provided with a connecting seat 201 that is threadedly connected to the adjusting screw 106, and the other side of the movable seat 2 is fixedly provided with a guide seat 202 that is slidably engaged with the guide rod 105; one side of one of the fixed plates 104 is fixedly provided with a motor frame 107, and a drive motor 108 is fixedly provided on the motor frame 107, and the transmission shaft of the drive motor 108 is fixedly connected to one end of the adjusting screw 106.

[0021] When the drive motor 108 starts, the adjusting screw 106 rotates, driving the connecting seat 201 and the moving seat 2 to move axially along the adjusting screw 106. At the same time, the guide seat 202 slides along the guide rod 105 to ensure that the moving seat 2 moves smoothly without tilting. The guide rod 105 also serves as a reinforcing member, enhancing the connection rigidity of the front and rear fixed plates 104.

[0022] The rotary joint 203 is a bidirectional flow-type rotary sealing joint. Its stator part is fixedly connected to the movable seat 2, and the lower end of the rotor part extends out of the bottom surface of the movable seat 2 and is fixedly connected to the upper end of the cleaning rod 3. The upper end is located above the movable seat 2. The rotary joint 203 allows the cleaning rod 3 to rotate around its own axis under the drive of the rotary drive component, while ensuring that the internal fluid channel is unobstructed.

[0023] The top of the rotary joint 203 is equipped with a branch pipe 205, and the top ends of multiple branch pipes 205 are fixedly connected to a water inlet pipe 204. The water inlet pipe 204 is arranged horizontally along the length of the movable seat 2, and a water inlet hose 206 is provided at one end or in the middle. The water inlet hose 206 is used to connect to an external water supply pump.

[0024] The cleaning rod 3 is a hollow tubular structure, with a mounting base 301 fixed at its bottom end and a coaxial pin hole.

[0025] The top of the cleaning box 303 is fixedly provided with a top cover 304, and a rotating seat 305 is fixedly provided on the top surface of the top cover 304. The rotating seat 305 is rotatably connected to the mounting base 301 through a rotating shaft 306. A torsion spring is sleeved on the rotating shaft 306. One end of the torsion spring abuts against the side wall of the mounting base 301, and the other end abuts against the top surface of the top cover 304, so that the cleaning box 303 always has a downward swinging tendency under normal conditions.

[0026] The surface of the upper cover 304 has a through hole, and a water outlet hose 302 is sealed and connected inside the through hole; the upper end of the water outlet hose 302 is sleeved on the lower outer wall of the cleaning rod 3 and fastened, and the lower end passes through the through hole of the upper cover 304 and extends into the interior of the cleaning box 303, so that the inner cavity of the cleaning rod 3 is connected to the interior of the cleaning box 303.

[0027] The interior of the cleaning box 303 is divided into two cavities by a partition plate 307: an upper buffer cavity and a lower capillary cavity. The partition plate 307 is integrally formed or fixedly connected to the cleaning box 303. A water passage hole 308 is provided on the surface of the partition plate 307, which connects the buffer cavity and the capillary cavity. The lower end outlet of the water outlet hose 302 is located in the buffer cavity.

[0028] The bottom end of the cleaning box 303 is permeated with multiple capillary absorbent fiber bundles 309. The upper end of the capillary absorbent fiber bundles 309 passes through the water passage 308 and extends into the capillary cavity, while the lower end extends out of the lower surface of the bottom plate of the cleaning box 303. The capillary absorbent fiber bundles 309 are made of high-density hydrophilic fibers twisted together, and have a capillary wicking effect, which can slowly and evenly conduct the liquid in the capillary cavity to the lower end.

[0029] The bottom surface of the cleaning box 303 is fixed with soft bristles, which are arranged in an array. The lower end of the capillary absorbent fiber bundle 309 extends into the soft bristle 310 layer, and its end is basically flush with or slightly lower than the tip of the soft bristle 310.

[0030] The movable seat 2 is provided with a rotation drive component on one side, which is used to drive all cleaning rods 3 and cleaning box 303 to rotate synchronously.

[0031] The rotary drive component includes multiple mounting plates 3011 corresponding to the cleaning rod 3. The mounting plates 3011 are fixedly mounted on the bottom surface of the movable seat 2 and located beside the cleaning rod 3. Each mounting plate 3011 has a mounting shaft 3012 rotatably mounted on its bottom. One end of the mounting shaft 3012 is fixedly provided with a second bevel gear 3013, and the other end is fixedly provided with a third bevel gear 3014.

[0032] The bottom of the cleaning rod 3 is fixedly fitted with a bevel gear 3010, which meshes with the bevel gear 3013.

[0033] Two mounting brackets 3015 are fixedly provided on one side of the movable seat 2. A fixed shaft 3016 is rotatably provided between the two mounting brackets 3015. The fixed shaft 3016 is arranged horizontally along the length of the movable seat 2. Multiple bevel gears 3017 are fixedly sleeved on its surface. The number of bevel gears 3017 corresponds to the number of cleaning rods 3, and each bevel gear 3017 is meshed with a bevel gear 3014 on the corresponding mounting shaft 3012.

[0034] One of the mounting brackets 3015 has a motor bracket 3018 fixedly mounted on one side, and a drive motor 3019 is fixedly mounted on the motor bracket 3018. The drive shaft of the drive motor 3019 is fixedly connected to one end of the fixed shaft 3016.

[0035] When the drive motor 3019 starts, the fixed shaft 3016 rotates, which drives each bevel gear 3017 to rotate synchronously, thereby driving each mounting shaft 3012 and bevel gears 3013 and 3014 to rotate. Bevel gear 3013 meshes with bevel gear 3010, thereby driving the cleaning rod 3 and the cleaning box 303 to rotate around their own axis.

[0036] In use, the entire device is placed above the sunroof of the car. The suction cups 103 at the bottom of the four support bases 1 contact and press against the flat surface of the car roof, causing air to escape from the suction cups 103 and creating negative pressure suction, temporarily fixing the entire device to the roof. At this time, since each cleaning box 303 is rotatably connected to the mounting base 301 via a rotating shaft 306, and a torsion spring is fitted on the rotating shaft 306, the elasticity of the torsion spring causes the cleaning box 303 to maintain a downward swinging tendency under normal conditions. When the soft bristles 310 at the bottom of the cleaning box 303 contact the sunroof surface, the glass exerts an upward reaction force on the cleaning box 303. To overcome part of the torque of the torsion spring, the cleaning box 303 swings upward at a certain angle around the rotation axis 306. Since each cleaning box 303 is independently set and has its own independent torsion spring and hinge structure, each cleaning box 303 can independently adjust the swing angle according to the height and curvature of the glass surface at the contact position. When the skylight glass is curved, the cleaning box 303 located in the center swings at a smaller angle, while the cleaning box 303 located at the edge swings at a larger angle. The soft bristles 310 of all cleaning boxes 303 can adhere to the glass surface with basically consistent contact pressure. When the drive motor 108 is started, its transmission shaft drives the adjusting screw 106 to rotate around its own axis. The adjusting screw 106 is threadedly connected to the connecting seat 201, which is fixed to one side of the movable seat 2. Due to the rotational movement of the adjusting screw 106, the connecting seat 201 and the movable seat 2 fixedly connected to it undergo linear displacement along the axial direction of the adjusting screw 106. A guide seat 202 is fixedly provided on the other side of the movable seat 2, and the guide seat 202 is slidably sleeved on the outer wall of the guide rod 105. 05 is fixed between the fixing plates 104 on the front and rear sides, and its axis is parallel to the axis of the adjusting screw 106; during the movement of the moving seat 2, the guide seat 202 slides along the guide rod 105, which guides and supports the moving seat 2, and prevents the moving seat 2 from deflecting or tilting due to unilateral drive; the forward and reverse rotation of the drive motor 108 controls the forward and backward movement of the moving seat 2, so that the moving seat 2 makes uniform reciprocating linear motion along the front and rear direction of the sunroof glass, driving all the cleaning boxes 303 on it to cover the entire surface of the sunroof glass; When the drive motor 2 3019 is started, its transmission shaft drives the fixed shaft 3016 to rotate around its own axis. Multiple bevel gears 4 3017 are fixedly sleeved on the surface of the fixed shaft 3016, rotating synchronously with it. Each bevel gear 4 3017 meshes with a bevel gear 3014 at one end of the corresponding mounting shaft 3012. When the bevel gear 4 3017 rotates, it drives the bevel gear 3014 and the mounting shaft 3012 to rotate around their own axis. A bevel gear 2 3013 is fixedly mounted at the other end of the mounting shaft 3012, and this bevel gear 2 3013 is fixedly sleeved with a bevel gear at the bottom of the cleaning rod 3. When the first gear 3010 meshes and the mounting shaft 3012 rotates, the second bevel gear 3013 drives the first bevel gear 3010 and the cleaning rod 3 to rotate around their own axis. The upper end of the cleaning rod 3 is rotatably connected to the moving seat 2 through the rotary joint 203, and the lower end is rotatably connected to the cleaning box 303 through the mounting seat 301. When the cleaning rod 3 rotates, it drives the cleaning box 303 and the soft bristles 310 at the bottom to rotate synchronously. Through the above-mentioned multi-stage bevel gear transmission system, a single drive motor 3019 can drive all the cleaning rods 3 and the cleaning box 303 to rotate synchronously at the same speed and in the same direction, without the need to set up a separate power source for each cleaning unit. The external water supply pump is started, and clean water enters the inlet pipe 204 through the inlet hose 206. The inlet pipe 204 is horizontally arranged along the length of the movable seat 2, and its internal channels are connected to multiple branch pipes 205. The clean water flows into the top inlet of each rotary joint 203 through the branch pipes 205. The rotary joint 203 is a bidirectional flow-type rotary sealing joint, with its stator fixedly connected to the movable seat 2 and its rotor fixedly connected to the cleaning rod 3. When the cleaning rod 3 rotates, the rotor rotates with the cleaning rod 3, while the stator remains stationary. The sealing structure inside the rotary joint 203 ensures that the fluid channel remains unobstructed and leak-free during relative rotation. The clean water flows into the hollow cavity of the cleaning rod 3 through the rotary joint 203, and then into the cleaning box 303 through the outlet hose 302 connected to the bottom of the cleaning rod 3. The lower outlet of the outlet hose 302 is located in the buffer cavity above the partition plate 307 inside the cleaning box 303. The clean water first enters the buffer cavity and flows through the surface of the partition plate 307. Water slowly flows into the capillary cavity below through the water inlet 308. Multiple capillary absorbent fiber bundles 309 are located within the capillary cavity. These bundles are made of high-density hydrophilic fibers twisted together, exhibiting a significant capillary wicking effect. The upper ends of the capillary absorbent fiber bundles 309 are immersed in the water within the capillary cavity, while the lower ends penetrate the bottom plate of the cleaning box 303 and extend into the soft bristle layer 310. Under capillary action, water within the capillary cavity is continuously absorbed by the fiber bundles and conducted downwards along the micro-channels within the fiber bundles, eventually reaching the ends of the fiber bundles and wetting the tips of the surrounding soft bristles 310. This water supply method eliminates the need for spray holes on the bottom plate of the cleaning box 303. Water is not directly sprayed onto the glass surface but rather slowly and evenly penetrates to the bristle tips through the capillary action of the fiber bundles. During the rotating wiping process of the cleaning box 303, the bristle tips always contain a suitable amount of water, providing a moist wiping effect on the sunroof glass surface without generating excess water droplets that flow or drip along the sunroof edge into the cockpit.

[0037] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A cleaning device for a car sunroof, comprising a support base (1) and a movable base (2), characterized in that, The top of the movable seat (2) is fixedly provided with multiple rotary joints (203). The bottom of the rotary joint (203) is provided with a hollow cleaning rod (3). The bottom of the cleaning rod (3) is provided with a cleaning box (303) that swings downward normally. The interior of the cleaning box (303) is divided into two cavities by a partition plate (307). The surface of the partition plate (307) is provided with a water passage hole (308). The top of the cleaning box (303) is fixedly provided with a top cover (304). The surface of the top cover (304) is provided with a water outlet hose (302) that communicates with the cleaning rod (3) and the upper cavity. The bottom of the cleaning box (303) is permeated with a capillary water-absorbing fiber bundle (309). A rotary drive component is provided on one side of the movable seat (2).

2. The cleaning device for automobile sunroofs according to claim 1, characterized in that: The support base (1) is provided in four parts. The adjacent support bases (1) are fixedly connected by a reinforcing rod (101). The bottom end of the support base (1) is fixedly provided with a support column (102), and the bottom end of the support column (102) is fixedly provided with a suction cup (103).

3. The cleaning device for automobile sunroofs according to claim 2, characterized in that: The top of the support base (1) is fixedly provided with a fixing plate (104), and an adjusting screw (106) is rotatably provided between the two fixing plates (104) on the same side. A guide rod (101) is fixedly provided between the two fixing plates (104) on the other side. A connecting seat (201) that is threadedly connected to the adjusting screw (106) is fixedly provided on one side of the movable base (2), and a guide seat (202) that slides with the guide rod (101) is fixedly provided on the other side of the movable base (2).

4. The cleaning device for automobile sunroofs according to claim 3, characterized in that: One of the fixed plates (104) is fixedly provided with a motor frame (107) on one side, and a drive motor (108) is fixedly provided with a drive motor (108) on one side. The drive shaft of the drive motor (108) is fixedly connected to one end of the adjusting screw (106).

5. The cleaning device for automotive sunroofs according to claim 1, characterized in that: The top of the rotary joint (203) is equipped with a branch pipe (205), and the top of the multiple branch pipes (205) is fixed with a water inlet pipe (204). A water inlet hose (206) is provided in the middle of one side of the water inlet pipe (204).

6. The cleaning device for automobile sunroofs according to claim 1, characterized in that: The bottom end of the cleaning rod (3) is fixedly provided with a mounting base (301), and the top end of the cover (304) is fixedly provided with a rotating base (305). The rotating base (305) is rotatably connected to the mounting base (301) through a rotating shaft (306). A torsion spring is sleeved on the surface of the rotating shaft (306) so that the cleaning box (303) is normally in a downward swinging state.

7. The cleaning device for automobile sunroofs according to claim 1, characterized in that: The rotary drive component includes multiple mounting plates (3011) corresponding to the cleaning rod (3). The bottom of the mounting plate (3011) is rotatably provided with a mounting shaft (3012). One end of the mounting shaft (3012) is fixedly provided with a bevel gear two (3013), and the other end of the mounting shaft (3012) is fixedly provided with a bevel gear three (3014). Two mounting brackets (3015) are fixedly provided on one side of the movable seat (2). A fixed shaft (3016) is rotatably provided between the two mounting brackets (3015). A bevel gear four (3017) that meshes with the bevel gear three (3014) is fixedly provided on the surface of the fixed shaft (3016). A bevel gear one (3010) that meshes with the bevel gear two (3013) is fixedly provided at the bottom of the cleaning rod (3).

8. The cleaning device for a car sunroof according to claim 7, characterized in that: One of the mounting brackets (3015) is fixedly provided with a motor bracket (3018) on one side, and a drive motor (3019) is fixedly provided with a drive motor (3019) on one side. The drive shaft of the drive motor (3019) is connected to one end of the fixed shaft (3016).

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