Steel structure rust removal device

Abstract

A steel structure rust removal device comprises a sliding assembly and a polishing assembly, and the polishing assembly is movably connected to the upper portion of the sliding assembly. The grinding assembly is used for grinding an arc-shaped groove in a C-shaped steel groove and comprises a movable plate, a spring and a grinding wheel, the spring is fixedly connected to the front portion of the movable plate, the grinding wheel is arranged on the lower portion of the movable plate, a certain angle is formed between the central axis of the grinding wheel and the C-shaped steel groove, and the angle ranges from 120 degrees to 150 degrees. When the lower connecting plate moves forwards along with the rotating block, the grinding wheel is driven to move forwards, the grinding wheel is made to be attached to the arc-shaped groove, the grinding wheel is designed to be a conical wheel, and the grinding wheel can be attached to the arc-shaped groove more accurately; the grinding assembly is driven by external force to do reciprocating circulating motion on the C-shaped steel, the grinding wheel is driven to do front-back reciprocating circulating motion in the arc-shaped groove, and therefore the arc-shaped groove is ground.

Description

Technical Field

[0001] The invention belongs to the technical field of grinding and rust removal, and specifically refers to a steel structure rust removal device. Background Art

[0002] C-shaped Steel is a common form of steel, usually used in construction, bridges, mechanical equipment, automobiles and other fields. Its cross-sectional shape is similar to the letter "C", hence the name C-shaped steel; and C-shaped steel has two right-angled sides and a curved part in the middle. This shape provides better bending resistance.

[0003] C-shaped steel is mostly processed by forming machines or cold bending machines, that is, the steel plate is subjected to multiple rolling or cold bending processes to gradually form a C-shaped cross-section. During the above processing, it is inevitable that there is a curvature between the two right-angled sides of the C-shaped steel and the bottom plane, and the larger the C-shaped steel, the larger the curvature.

[0004] The curved arc is the connection between the right-angle side and the bottom plane. If this part is corroded, the bearing capacity of the C-shaped steel will inevitably be reduced. Also, since the arc at this part is concave inward, the traditional grinder cannot grind this part at one time. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a steel structure rust removal device, which at least partially solves the above problems.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a steel structure rust removal device, including a sliding component and a grinding component, wherein; The grinding assembly includes a movable plate, a spring and a grinding wheel, the front part of the movable plate is fixedly connected with a spring, the grinding wheel is arranged at the lower part of the movable plate, and a set angle is formed between the central axis of the grinding wheel and the C-shaped steel groove, and the range of the set angle is 120° to 150°; The sliding assembly includes a side mounting plate, a sliding platform and a mounting back plate. The side mounting plate is used to fix the two sides of the C-shaped steel. The sliding platform is arranged between the two groups of side mounting plates. The mounting back plate is fixed to the upper part of the sliding platform.

[0007] Furthermore, the grinding assembly also includes a driving motor, a motor shaft, a thread, a rotating table, a connecting plate, a horizontal platform, a vertical platform, a plug plate, a roller, a middle connecting table, a connecting rod, a rotating block and a lower connecting plate. The driving motor is fixedly connected to the upper part of the sliding assembly, and the front part of the driving motor is fixedly connected to the motor shaft.

[0008] Furthermore, a thread is provided in the middle of the motor shaft, and a connecting plate is rotatably connected to the lower part of the rotating table, a horizontal platform is fixedly connected to the lower part of the connecting plate, a vertical platform is fixedly connected to the lower part of the horizontal platform, and two groups of plug plates are movably connected to the middle part of the vertical platform, and rollers are movably connected between the two groups of plug plates, and a connecting rod is rotatably connected to the lower part of the middle connecting table, and a rotating block is rotatably connected to the front part of the connecting rod, and the lower part of the rotating block is detachably connected to two groups of lower connecting plates.

[0009] Furthermore, the movable plate is rotatably connected to the motor shaft via a thread, the front portion of the spring is fixedly connected to a rotating table, the lower portion of the movable plate is fixedly connected to a middle connecting table, and a grinding wheel is rotatably connected between the two groups of lower connecting plates.

[0010] Furthermore, the sliding assembly also includes a lower screw rod, an upper sliding rod, a rear motor, an intermediate fixing plate, a fastening plate, a tightening handle, a rotating fixing plate and a knob, and the lower screw rod is arranged at the lower part of the upper sliding rod.

[0011] Furthermore, the rear motor is detachably connected to one end of the lower screw, the fastening plate is arranged at the front of the middle fixed plate, the tightening handle is rotatably connected to the rear of the fastening plate, the tightening handle is movably connected to the middle fixed plate through a thread, and the rear of the rotating fixed plate is fixedly connected with a knob.

[0012] Furthermore, the lower screw is rotatably connected between the two groups of side mounting plates, the upper sliding rod is fixedly connected between the two groups of side mounting plates, the rear motor is fixedly connected to the rear of any one group of side mounting plates, the front of the two groups of side mounting plates are fixedly connected with an intermediate fixing plate, and the knob passes through the side mounting plate and is movably connected to the side mounting plate.

[0013] Furthermore, the lower part of the sliding platform is rotationally connected to the lower screw rod, and the upper part of the sliding platform is movably connected to the upper sliding rod through a sliding groove.

[0014] Furthermore, the driving motor is fixed to the mounting back plate.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: (1) When the lower connecting plate moves forward following the rotating block, the grinding wheel is driven to move forward and fits the arc-shaped groove. The grinding wheel adopts a conical wheel design, which can fit the arc-shaped groove more accurately. The grinding assembly is driven by external force to perform reciprocating cyclic motion on the C-shaped steel, which drives the grinding wheel to perform reciprocating cyclic motion back and forth in the arc-shaped groove, thereby grinding the arc-shaped groove.

[0016] (2) When the center axis of the grinding wheel is parallel to the C-shaped steel groove, if the arc of the arc groove is small but the radius of the grinding wheel is large, the grinding wheel will inevitably fit the vertical steel plate of the C-shaped steel at the same time, leaving a certain gap at the bottom of the horizontal steel plate of the C-shaped steel, and a part of the arc groove will inevitably not be ground by the grinding wheel; the above problem can be solved by designing a certain angle between the center axis of the grinding wheel and the C-shaped steel groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a steel structure rust removal device proposed in an embodiment of the present invention; Figure 2 A front view of a steel structure rust removal device proposed in an embodiment of the present invention; Figure 3 A three-dimensional diagram of a grinding assembly according to an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a grinding assembly proposed in an embodiment of the present invention; Figure 5 A front view of a sliding assembly provided in an embodiment of the present invention; Figure 6 It is a schematic structural diagram of a sliding assembly proposed in an embodiment of the present invention.

[0018] Among them, 1. C-shaped steel, 2. sliding assembly, 3. grinding assembly, 4. arc groove; 201, side mounting plate, 202, lower screw rod, 203, upper sliding rod, 204, rear motor, 205, middle fixing plate, 206, fastening plate, 207, rotating handle, 208, rotating fixing plate, 209, knob, 210, sliding platform, 211, mounting back plate; 301, driving motor, 302, motor shaft, 303, thread, 304, movable plate, 305, spring, 306, rotating table, 307, connecting plate, 308, horizontal platform, 309, vertical platform, 310, plug plate, 311, roller, 312, middle connecting table, 313, connecting rod, 314, rotating block, 315, lower connecting plate, 316, grinding wheel; A. Angle.

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention proposes a steel structure rust removal device, comprising a sliding component 2 and a grinding component 3, wherein; The grinding assembly 3 includes a movable plate 304, a spring 305 and a grinding wheel 316. The front portion of the movable plate 304 is fixedly connected to the spring 305. The grinding wheel 316 is disposed at the lower portion of the movable plate 304. A set angle A is formed between the central axis of the grinding wheel 316 and the groove of the C-shaped steel 1. The range of the set angle A is 120° to 150°. The sliding component 2 includes a side mounting plate 201, a sliding platform 210 and a mounting back plate 211. The side mounting plate 201 is used to fix the two sides of the C-shaped steel 1. The sliding platform 210 is arranged between the two groups of side mounting plates 201. The mounting back plate 211 is fixedly connected to the upper part of the sliding platform 210.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the grinding assembly 3 also includes a driving motor 301, a motor shaft 302, a thread 303, a rotating table 306, a connecting plate 307, a horizontal platform 308, a vertical platform 309, a plug plate 310, a roller 311, a middle connecting platform 312, a connecting rod 313, a rotating block 314 and a lower connecting plate 315. The driving motor 301 is fixedly connected to the upper part of the sliding assembly 2, and the front part of the driving motor 301 is fixedly connected to the motor shaft 302.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a thread 303 is provided in the middle of the motor shaft 302, a connecting plate 307 is rotatably connected to the lower part of the rotating platform 306, a horizontal platform 308 is fixedly connected to the lower part of the connecting plate 307, a vertical platform 309 is fixedly connected to the lower part of the horizontal platform 308, two groups of plug plates 310 are movably connected to the middle part of the vertical platform 309, rollers 311 are movably connected between the two groups of the plug plates 310, a connecting rod 313 is rotatably connected to the lower part of the middle connecting platform 312, a rotating block 314 is rotatably connected to the front part of the connecting rod 313, and two groups of lower connecting plates 315 are detachably connected to the lower part of the rotating block 314.

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the movable plate 304 is rotatably connected to the motor shaft 302 via a thread 303, a rotating table 306 is fixedly connected to the front of the spring 305, a middle connecting table 312 is fixedly connected to the lower portion of the movable plate 304, and a grinding wheel 316 is rotatably connected between the two groups of lower connecting plates 315.

[0026] In this embodiment, first, the C-shaped steel 1 is a flattened steel strip or coil placed into a C-shaped steel forming machine, and is processed into the shape of a C-shaped steel through the cold bending forming technology of the forming machine. Therefore, there are two vertical steel plates on both sides of the C-shaped steel 1, and then the vertical platform 309 is placed on the outside of the vertical steel plate on one side.

[0027] Two groups of plug plates 310 are movably connected in the middle of the vertical platform 309, and rollers 311 are movably connected between the two groups of plug plates 310. After the vertical platform 309 is placed on the vertical steel plate on one side, the rollers 311 can be made close to the vertical steel plate on one side; and when the grinding assembly 3 is made to perform reciprocating motion on the C-shaped steel 1 by external force, if there is no roller 311, the vertical platform 309 will always be in a working state of mutual friction with the vertical steel plate on one side, which will inevitably affect the grinding of the arc groove 4 by the grinding assembly 3. The rollers 311 can reduce the friction between the vertical platform 309 and the vertical steel plate on one side, so that the grinding assembly 3 can perform reciprocating motion on the C-shaped steel 1 more smoothly.

[0028] The front part of the driving motor 301 is fixedly connected to the motor shaft 302, and the middle part of the motor shaft 302 is provided with a thread 303. When the driving motor 301 starts to work, it will drive the motor shaft 302 to rotate. When the motor shaft 302 rotates, it will drive the thread 303 to rotate. At this time, the movable plate 304 and the motor shaft 302 are rotationally connected through the thread 303. When the thread 303 rotates and the net length of the motor shaft 302 does not change, the movable plate 304 will move forward or backward on the motor shaft 302.

[0029] The front part of the movable plate 304 is fixedly connected to a spring 305, and the front part of the spring 305 is fixedly connected to a rotating table 306. When the movable plate 304 moves forward or backward on the motor shaft 302, the spring 305 at the front part will accumulate or release elastic potential energy. When the spring 305 accumulates elastic potential energy, it will inevitably drive the rotating table 306 to follow the movement of the spring 305. The lower part of the rotating table 306 is rotatably connected to a connecting plate 307. When the rotating table 306 follows the movement of the spring 305, it will inevitably cause the connecting plate 307 to follow the movement.

[0030] A horizontal platform 308 is fixedly connected to the lower part of the connecting plate 307, and a vertical platform 309 is fixedly connected to the lower part of the horizontal platform 308. When the connecting plate 307 moves with the rotating table 306, the horizontal platform 308 and the vertical platform 309 at the lower part of the connecting plate 307 will also move with it, and finally drive the two sets of plug plates 310 and the roller 311 in the middle, and finally make the roller 311 close to the vertical steel plate on one side; when the roller 311 is close to the vertical steel plate on one side, the entire grinding assembly 3 can be firmly fixed on the C-shaped steel 1.

[0031] Because the lower part of the movable plate 304 is fixedly connected with the middle connecting platform 312, when the movable plate 304 moves forward on the motor shaft 302, it will inevitably drive the middle connecting platform 312 to move forward. When the middle connecting platform 312 moves forward, the connecting rod 313 connected to the middle connecting platform 312 will move forward.

[0032] The front part of the connecting rod 313 is rotatably connected to the rotating block 314. When the connecting rod 313 moves forward, it will inevitably drive the rotating block 314 to move forward. At this time, because the lower part of the rotating block 314 is detachably connected with two sets of lower connecting plates 315, when the rotating block 314 moves forward, the lower connecting plates 315 will also move forward with the rotating block 314.

[0033] A grinding wheel 316 is rotatably connected between the two groups of lower connecting plates 315. When the lower connecting plate 315 moves forward following the rotating block 314, the grinding wheel 316 is driven to move forward and fits the arc groove 4. The grinding wheel 316 has a conical shape and can fit the arc groove 4 more accurately. After the grinding assembly 3 is driven by external force to perform a reciprocating cyclic motion on the C-shaped steel 1, the grinding wheel 316 is driven to perform a reciprocating cyclic motion back and forth in the arc groove 4, thereby grinding the arc groove 4.

[0034] And as Figure 2As shown, the central axis of the grinding wheel 316 is not parallel to the groove of the C-shaped steel 1, but is obliquely pointed to the groove inside the C-shaped steel 1 at a certain angle, and the angle can be adjusted. It can be seen from the above movement process that when the motor shaft 302 drives the movable plate 304 forward, the angle A becomes larger, and the grinding wheel 316 fits the vertical steel plate of the C-shaped steel 1 more closely. When the motor shaft 302 drives the movable plate 304 backward, the angle A becomes smaller, and the grinding wheel 316 fits the horizontal steel plate of the C-shaped steel 1 more closely. According to the above principle, if the arc of the arc groove 4 is too large, the motor shaft 302 can be adjusted to drive the grinding wheel 316 to fit the arc of the upper half of the arc groove 4. When the arc of the upper half of the arc groove 4 is polished, it can be made to fit the arc of the lower half of the arc groove 4 and polish it.

[0035] When the center axis of the grinding wheel 316 is parallel to the groove of the C-shaped steel 1, if the arc groove 4 has a small curvature but the radius of the grinding wheel 316 is large, the grinding wheel 316 will inevitably fit the vertical steel plate of the C-shaped steel 1 at the same time, leaving a certain gap at the bottom of the horizontal steel plate of the C-shaped steel 1, and a part of the arc groove 4 will inevitably not be ground by the grinding wheel 316. The above problem can be solved by making the center axis of the grinding wheel 316 and the groove of the C-shaped steel 1 have a certain angle A, which can solve the above problem.

[0036] like Figure 5 and Figure 6 As shown, the sliding assembly 2 also includes a lower screw rod 202, an upper sliding rod 203, a rear motor 204, an intermediate fixing plate 205, a fastening plate 206, a tightening handle 207, a rotating fixing plate 208 and a knob 209, and the lower screw rod 202 is arranged at the lower part of the upper sliding rod 203.

[0037] like Figure 5 and Figure 6 As shown, the rear motor 204 is detachably connected to one end of the lower screw 202, the fastening plate 206 is arranged at the front of the middle fixed plate 205, the tightening handle 207 is rotatably connected to the rear of the fastening plate 206, the tightening handle 207 is movably connected to the middle fixed plate 205 through a thread, and the rear of the rotating fixed plate 208 is fixedly connected with a knob 209.

[0038] like Figure 5 and Figure 6 As shown, the lower screw rod 202 is rotatably connected between the two groups of side mounting plates 201, the upper sliding rod 203 is fixedly connected between the two groups of side mounting plates 201, the rear motor 204 is fixedly connected to the rear of any one group of side mounting plates 201, and the front of the two groups of side mounting plates 201 are fixedly connected with an intermediate fixing plate 205, and the knob 209 passes through the side mounting plate 201 and is movably connected to the side mounting plate 201.

[0039] like Figure 5 and Figure 6 As shown, the lower part of the sliding platform 210 is rotationally connected to the lower screw rod 202, and the upper part of the sliding platform 210 is movably connected to the upper sliding rod 203 through a sliding groove.

[0040] like Figure 5 and Figure 6 As shown, the driving motor 301 is fixed to the mounting back plate 211 .

[0041] In this embodiment, first, the rear motor 204 is detachably connected to one end of the lower screw 202. When the rear motor 204 rotates, it can drive the lower screw 202 to rotate. At this time, the sliding platform 210 connected to the lower screw 202 can be engaged with the threads to make the sliding platform 210 slide back and forth on the upper slide bar 203. Because the grinding component 3 is movably connected to the upper part of the sliding component 2, when the sliding platform 210 moves, it can drive the grinding component 3 to move, and make the grinding component 3 grind the arc groove 4.

[0042] When using the sliding assembly 2, the rotating fixed plate 208 should be first placed close to the vertical steel plate on the other side of the C-shaped steel 1. Sometimes the inner wall of the vertical steel plate has a certain inclination angle. At this time, the rotating fixed plate 208 can be adjusted by adjusting the knob 209 connected to the rotating fixed plate 208 to make it tightly fit the vertical steel plate on the other side of the C-shaped steel 1.

[0043] Then the tightening handle 207 can be continuously rotated, and the tightening handle 207 is movably connected with the middle fixed plate 205 through a thread. At this time, the fastening plate 206 in front of the tightening handle 207 will continue to move forward, and finally the fastening plate 206 will tightly fit the outer surface of the vertical steel plate on the other side of the C-shaped steel 1, and finally fix the sliding component 2 on the C-shaped steel 1.

[0044] When the sliding component 2 drives the grinding component 3 to grind the arc groove 4 on one side of the C-shaped steel 1, it is only necessary to remove the sliding component 2 and fix it on the side that has been grinded, and then repeat the above working process to grind the arc groove 4 on the other side of the C-shaped steel 1.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0047] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A steel structure rust removal device, characterized in that: It comprises a sliding component (2) and a grinding component (3), in,; The grinding assembly (3) comprises a movable plate (304), a spring (305) and a grinding wheel (316); the front portion of the movable plate (304) is fixedly connected to the spring (305); the grinding wheel (316) is arranged at the bottom portion of the movable plate (304); a set angle (A) is formed between the central axis of the grinding wheel (316) and the groove of the C-shaped steel (1); and the range of the set angle (A) is 120° to 150°; The sliding assembly (2) comprises a side mounting plate (201), a sliding platform (210) and a mounting back plate (211), wherein the side mounting plate (201) is used to fix two sides of the C-shaped steel (1), the sliding platform (210) is arranged between two groups of side mounting plates (201), and the mounting back plate (211) is fixedly connected to the upper part of the sliding platform (210).

2. The steel structure rust removal device according to claim 1, characterized in that: The grinding assembly (3) further comprises a driving motor (301), a motor shaft (302), a screw thread (303), a rotating platform (306), a connecting plate (307), a horizontal platform (308), a vertical platform (309), a plug plate (310), a roller (311), a middle connecting platform (312), a connecting rod (313), a rotating block (314) and a lower connecting plate (315); the driving motor (301) is fixedly connected to the upper part of the sliding assembly (2); and the front part of the driving motor (301) is fixedly connected to the motor shaft (302).

3. The steel structure rust removal device according to claim 2, characterized in that: A thread (303) is provided in the middle of the motor shaft (302); a connecting plate (307) is rotatably connected to the lower part of the rotating platform (306); a horizontal platform (308) is fixedly connected to the lower part of the connecting plate (307); a vertical platform (309) is fixedly connected to the lower part of the horizontal platform (308); two groups of plug plates (310) are movably connected to the middle part of the vertical platform (309); rollers (311) are movably connected between the two groups of plug plates (310); a connecting rod (313) is rotatably connected to the lower part of the middle connecting platform (312); a rotating block (314) is rotatably connected to the front part of the connecting rod (313); and two groups of lower connecting plates (315) are detachably connected to the lower part of the rotating block (314).

4. The steel structure rust removal device according to claim 2, characterized in that: The movable plate (304) is rotatably connected to the motor shaft (302) via a thread (303); a rotating platform (306) is fixedly connected to the front of the spring (305); a middle connecting platform (312) is fixedly connected to the lower part of the movable plate (304); and a grinding wheel (316) is rotatably connected between the two groups of lower connecting plates (315).

5. The steel structure rust removal device according to claim 1, characterized in that: The sliding assembly (2) further comprises a lower screw rod (202), an upper sliding rod (203), a rear motor (204), an intermediate fixing plate (205), a fastening plate (206), a tightening handle (207), a rotating fixing plate (208) and a knob (209), wherein the lower screw rod (202) is arranged at the bottom of the upper sliding rod (203).

6. The steel structure rust removal device according to claim 5, characterized in that: The rear motor (204) is detachably connected to one end of the lower screw rod (202); the fastening plate (206) is arranged at the front of the middle fixing plate (205); the tightening handle (207) is rotatably connected to the rear of the fastening plate (206); the tightening handle (207) is movably connected to the middle fixing plate (205) via a thread; and a knob (209) is fixedly connected to the rear of the rotating fixing plate (208).

7. The steel structure rust removal device according to claim 5, characterized in that: The lower screw rod (202) is rotatably connected between the two groups of side mounting plates (201), the upper sliding rod (203) is fixedly connected between the two groups of side mounting plates (201), the rear motor (204) is fixedly connected to the rear of any one group of side mounting plates (201), the front of the two groups of side mounting plates (201) are fixedly connected to the middle fixing plate (205), and the knob (209) passes through the side mounting plate (201) and is movably connected to the side mounting plate (201).

8. The steel structure rust removal device according to claim 5, characterized in that: The lower part of the sliding platform (210) is rotationally connected to the lower screw rod (202), and the upper part of the sliding platform (210) is movably connected to the upper sliding rod (203) via a sliding groove.

9. The steel structure rust removal device according to claim 2, characterized in that: The driving motor (301) is fixedly connected to the mounting back plate (211).

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