Stamping steel belt guiding device
By using a structure of rubber rollers and guide plates to guide the steel strip straight, the problems of straightness and adaptability of the steel strip guiding device are solved, and efficient waste collection is achieved, improving stamping quality and resource utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINXIANG ZHENGYUAN ELECTRONIC MATERIAL CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-05-12
AI Technical Summary
Existing stamping steel strip guiding devices cannot straighten the steel strip, cannot guide steel strips of different widths, and cannot effectively collect steel strip scrap, resulting in poor stamping quality, mold damage, and resource waste.
It adopts a structure of rubber rollers and guide plates. The steel strip is straightened by the squeezing action of the rubber rollers, and the gap of the guide plates can be adjusted to accommodate steel strips of different widths. It is combined with a winding machine to collect waste materials.
It achieves straight guidance of steel strip, adapts to steel strips of different widths, protects the mold, saves costs, effectively collects waste, and improves stamping quality and resource utilization.
Smart Images
Figure CN224222373U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of metal processing technology, and in particular relates to a stamping steel strip guide device. Background Technology
[0002] Stamped steel, also known as stamped forming steel, is an industrial steel material that is plastically formed by molds and pressure. It is widely used in the automotive, instrumentation, and home appliance manufacturing industries. It is supplied in the form of steel plates or strips. During the stamping process of steel strips, the strip may shift, making it difficult to continue the stamping operation and damaging the stamping mold. To prevent this shift, stamped steel strip guiding devices have been developed. However, the mainstream stamped steel strip guiding devices currently on the market still have the following problems in use:
[0003] 1. Since steel strips are generally stored in the form of steel coils, when guiding the steel strips, the mainstream stamping steel strip guiding device directly guides the steel strips to the stamping machine. The originally bent steel strips cannot be straightened. During the stamping process, due to inaccurate positioning and other reasons, the stamped products may be of poor quality. At the same time, the bent steel strips may damage the stamping dies.
[0004] 2. Currently, the mainstream stamping steel strip guiding devices on the market can only guide steel strips of a specific width. If steel strips of different widths need to be guided and stamped, stamping steel strip guiding devices of corresponding sizes are required, which increases the cost of stamping steel strip guiding work.
[0005] 3. After the steel strip is stamped, the remaining steel strip scrap can be reused, saving resources. However, the current mainstream stamping steel strip guiding device cannot effectively collect the steel strip scrap, resulting in a waste of resources.
[0006] To address these issues, we provide a stamped steel strip guide device. Utility Model Content
[0007] The purpose of this utility model is to provide a stamping steel strip guiding device. By setting up rubber roller 2, rubber roller 3, rubber roller 4, guide plate, limit strip, rubber roller 5 and winding machine, it solves the problems of existing stamping steel strip guiding devices being unable to make the steel strip into a straight state, unable to guide steel strips of different widths, and unable to collect steel strip waste.
[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0009] This utility model is a stamping steel strip guiding device, including a guiding machine, a stamping machine, and a winding machine; the stamping machine is located between the guiding machine and the winding machine.
[0010] The steel strip is first guided by a guide machine and then enters the stamping machine for stamping. After the stamping is completed, the coiler collects the steel strip scrap.
[0011] The guiding machine includes a guide platform. Two support plates are fixedly connected to the top two sides of the guide platform. Rubber roller 2 and rubber roller 3 are arranged above the guide platform between the two support plates, with rubber roller 2 located directly above rubber roller 3. Two rubber roller 4 are also arranged at the same height as rubber roller 2 and rubber roller 3 on the guide platform near the side of the press. The two ends of rubber roller 2, rubber roller 3, and rubber roller 4 are rotatably connected to the two support plates. Two limiting strips are also arranged above the guide platform between the two support plates. The two ends of the two limiting strips are fixedly connected to the two support plates. Grooves are opened on the lower part of the side of the two limiting strips that are close to each other. Two guide plates are arranged between the two limiting strips. Protrusions are provided on both sides of the ends of the two guide plates near the two limiting strips. The two guide plates are fixed by inserting the protrusions into the grooves of the two limiting strips.
[0012] The guide table provides the workspace for the entire guiding operation. The support plate provides support for rubber rollers two, three, and four. The arrangement of rubber rollers two, three, and four enables the vertical guidance of the steel strip. At the same time, when the steel strip passes through the gap between rubber rollers two and three, and the gap between the two sets of rubber rollers four, the steel strip is flattened under the squeezing action of these rubber rollers, preventing damage to the stamping die during the stamping operation. The guide plate enables the horizontal guidance of the steel strip. The steel strip can only enter the stamping machine by passing through the gap between the two guide plates. By adjusting the position of the guide plate along the groove of the limit bar, steel strips of different thicknesses can be guided.
[0013] The stamping machine includes a worktable, the side of the worktable near the guide machine is fixedly connected to the guide table, and the upper part of the side of the worktable away from the guide machine is fixedly connected to two support frames two. A rubber roller five is arranged between the two support frames two. The two ends of the rubber roller five are respectively rotatably connected to the two support frames two. The winding machine includes a rotating shaft, and four winding arc plates are fixedly connected in a ring array around the rotating shaft.
[0014] The workbench provides a working space for the stamping operation and also provides support for the stamping machine. After the stamping operation is completed, the steel strip is pressed by the rubber roller five and moves to the winding machine position. Then the rotating shaft drives the winding arc plate to rotate, completing the collection of steel strip waste.
[0015] Furthermore, the guide machine also includes two legs, the tops of which are fixedly connected to the guide table, and a support frame is fixedly connected to the upper part of the side of the two legs away from the press. A rubber roller is rotatably connected between the opposite surfaces of the two support frames.
[0016] With the combined support of the outriggers and the worktable, the guide machine remains stable. During the guiding operation, the steel belt moves to the guide machine position in a taut state after being pressed by the first rubber roller, and then is guided through the gap between the second and third rubber rollers.
[0017] Furthermore, one end of the rubber roller 2 is fixedly connected to a gear 1, and one end of the rubber roller 3 near the gear 1 is fixedly connected to a gear 2, with the gear 1 and gear 2 meshing. A motor 1 is fixedly connected to the outside of the support plate away from the gear 1, and the output end of the motor 1 extends into the support plate and is connected to the end of the rubber roller 2 away from the gear 1 in a transmission connection.
[0018] When performing the guiding work, start motor one. The output end of motor one rotates and drives rubber roller two to rotate. Since gear one and gear two mesh, rubber roller three will also rotate in the opposite direction. The relative rotation of rubber roller two and rubber roller three allows the steel belt to move through the guiding machine on the one hand, and flattens the steel belt on the other hand.
[0019] Furthermore, hydraulic cylinders are fixedly connected to the opposite sides of the two support plates, and hydraulic rods are movably connected to the telescopic ends of the hydraulic cylinders. The end of the hydraulic rod away from the hydraulic cylinder extends into the support plate and is fixedly connected to the guide plate.
[0020] Activating the hydraulic cylinder causes the hydraulic rod to extend and retract, which in turn moves the guide plate. Adjusting the gap between the two guide plates guides steel strips of different widths.
[0021] Furthermore, the stamping machine also includes an L-shaped body, an upper stamping assembly and a lower stamping assembly. The bottom end of the lower stamping assembly is fixedly connected to the top end of the worktable, the top end of the upper stamping assembly is fixed to the bottom surface of the horizontal part of the body, and the upper stamping assembly is located above the lower stamping assembly.
[0022] During the stamping process, the upper stamping assembly moves downward to the surface of the lower stamping assembly. When the upper and lower stamping assemblies are close together, the steel strip can be stamped.
[0023] Furthermore, the winding machine also includes a frame, which is rotatably connected to a rotating shaft. A second motor is fixedly connected to the side of the frame away from the rotating shaft, and the end of the rotating shaft near the frame extends out of the frame and is connected to the second motor for transmission.
[0024] Start motor two. The output of motor two rotates, which drives the shaft to rotate, and in turn drives the winding arc plate to rotate, collecting the steel strip scrap after stamping.
[0025] This utility model has the following beneficial effects:
[0026] This invention solves the problem of not being able to straighten the steel strip by setting up rubber rollers two, three, and four. When the steel strip passes through the guide machine, the gaps between rubber rollers two and three, and between the two sets of rubber rollers four are small. The steel strip will be flattened under the squeezing action of rubber rollers two, three, and four, thus achieving the purpose of flattening the steel strip to protect the stamping die.
[0027] This invention solves the problem of guiding steel strips of different widths by setting guide plates and limiting strips. The steel strip can only enter the stamping machine for stamping by passing through the gap between the two guide plates. By moving the two guide plates along the grooves of the two limiting strips, the gap between the two guide plates can be adjusted, thereby guiding steel strips of different widths. This achieves the goal of guiding steel strips of different widths with only one guiding device, saving the cost of guiding stamping steel strips.
[0028] This invention solves the problem of not being able to collect stamped steel strip scrap by setting up a rubber roller five and a winding machine. After being pressed by the rubber roller five, the stamped steel strip scrap is taut and moves to the winding machine. Then, the rotating shaft drives the winding arc plate to rotate, which can wind up the stamped steel strip scrap, thus achieving the purpose of collecting stamped steel strip scrap and saving resources.
[0029] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a schematic diagram of a stamped steel strip guide device.
[0032] Figure 2 This is a schematic diagram of the state when a stamped steel strip guide device guides the steel strip.
[0033] Figure 3 This is a schematic diagram of the guide machine.
[0034] Figure 4 This is a cross-sectional schematic diagram of the guide machine.
[0035] Figure 5 This is a schematic diagram of the connection structure between rubber roller two and rubber roller three.
[0036] Figure 6 This is a schematic diagram of the connection structure of the guide platform, support plate, hydraulic cylinder, hydraulic rod, limit bar, and guide plate.
[0037] Figure 7 This is a schematic diagram of the stamping machine.
[0038] Figure 8 This is a schematic diagram of the winding machine.
[0039] The attached diagram lists the components represented by each number as follows:
[0040] 1. Guide machine; 101. Support leg; 102. Guide table; 103. Support frame one; 1031. Rubber roller one; 104. Support plate; 105. Rubber roller two; 1051. Gear one; 1052. Motor one; 106. Rubber roller three; 1061. Gear two; 107. Rubber roller four; 108. Guide plate; 109. Limiting strip; 2. Stamping machine; 201. Workbench; 202. Machine body; 203. Upper stamping assembly; 204. Lower stamping assembly; 205. Support frame two; 2051. Rubber roller five; 3. Winding machine; 301. Frame; 302. Motor two; 303. Rotating shaft; 304. Winding arc plate; 4. Hydraulic cylinder; 401. Hydraulic rod. Detailed Implementation
[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1
[0042] Please see Figure 1-6 This utility model is a stamping steel strip guiding device, including a guiding machine 1, a stamping machine 2 and a winding machine 3; the stamping machine 2 is located between the guiding machine 1 and the winding machine 3;
[0043] The steel strip is first guided by the guide machine 1 and then enters the stamping machine 2, where it is stamped. After the stamping is completed, the coiler 3 collects the steel strip waste.
[0044] The guide machine 1 includes a guide table 102. Two support plates 104 are fixedly connected to the top two sides of the guide table 102. Rubber roller 2 105 and rubber roller 3 106 are arranged above the guide table 102 between the two support plates 104, with rubber roller 2 105 located directly above rubber roller 3 106. Two rubber roller 4 107 are also arranged at the same height as rubber roller 2 105 and rubber roller 3 106 on the guide table 102 on the side of the guide table 102 closest to the press 2. The two ends of 07 are rotatably connected to the two support plates 104 respectively. Two limiting strips 109 are also provided above the guide platform 102 between the two support plates 104. The two ends of the two limiting strips 109 are fixedly connected to the two support plates 104 respectively. The lower part of the side of the two limiting strips 109 that are close to each other is provided with a groove. Two guide plates 108 are provided between the two limiting strips 109. The two guide plates 108 are provided with protrusions on both sides of the ends of the two guide plates 108 that are close to the two limiting strips 109 respectively. The two guide plates 108 are respectively inserted and fixed into the grooves of the two limiting strips 109 through the protrusions.
[0045] The guide table 102 provides a working space for the guiding operation and supports the support plate 104. The support plate 104 supports rubber rollers 105, 106, and 107. The arrangement of rubber rollers 105, 106, and 107 ensures that the steel strip can only pass through the gaps between rubber rollers 105 and 106, and between the two sets of rubber rollers 107, thus guiding the steel strip vertically. Simultaneously, when passing through the gaps between rubber rollers 105 and 106, and between the two sets of rubber rollers 107, the steel strip can pass through the guide table 102. When there is a gap between the 6 and the gap between the two sets of rubber rollers 107, the steel strip is flattened by the squeezing action of these rubber rollers and enters the stamping machine 2 for stamping, preventing damage to the stamping die during the stamping process; the setting of the guide plate 108 ensures that the steel strip can only enter the stamping machine 2 through the gap between the two guide plates 108, realizing the horizontal guidance of the steel strip; by adjusting the position of the guide plate 108 along the groove of the limiting strip 109, the gap between the two guide plates 108 can be adjusted to achieve the purpose of guiding steel strips of different thicknesses.
[0046] Among them, such as Figure 1-4 As shown, the stamping machine 2 includes a worktable 201. The side of the worktable 201 closest to the guide machine 1 is fixedly connected to the guide table 102. The guide machine 1 also includes two support legs 101. The tops of the two support legs 101 are fixedly connected to the guide table 102. The upper part of the side of the two support legs 101 away from the stamping machine 2 is fixedly connected to a support frame 103. A rubber roller 1031 is rotatably connected between the opposite surfaces of the two support frames 103.
[0047] With the joint support of the outrigger 101 and the worktable 201, the guide machine 1 remains stable. When performing the guiding work, the steel belt first moves to the bottom of the rubber roller 1031. After being pressed by the rubber roller 1031, it moves to the top of the guide table 102 in a taut state. Then, it performs the guiding work under the action of the rubber roller 2 105, the rubber roller 3 106, the rubber roller 4 107 and the guide plate 108.
[0048] Among them, such as Figure 1-5 As shown, one end of rubber roller 2 105 is fixedly connected to gear 1051, and one end of rubber roller 3 106 near gear 1051 is fixedly connected to gear 2 1061, with gear 1051 and gear 2 1061 meshing. Motor 1052 is fixedly connected to the outside of support plate 104 away from gear 1051, and the output end of motor 1052 extends into support plate 104 and is connected to the end of rubber roller 2 105 away from gear 1051.
[0049] When performing the guiding work, start motor 1052. The output end of motor 1052 rotates, driving rubber roller 2 105 to rotate. Gear 1051 will also rotate. Since gear 1051 and gear 2 1061 mesh, gear 2 1061 will rotate in the opposite direction as gear 1051 rotates. The reverse rotation of gear 2 1061 drives rubber roller 3 106 to rotate in the opposite direction. The relative rotation of rubber roller 2 105 and rubber roller 3 106 pulls the steel belt so that it can move and pass through the guide machine 1. On the other hand, it makes the steel belt straight.
[0050] Among them, such as Figure 1-6 As shown, hydraulic cylinders 4 are fixedly connected to the sides of the two support plates 104 that are far apart. The telescopic end of the hydraulic cylinder 4 is movably connected to a hydraulic rod 401. The end of the hydraulic rod 401 that is far away from the hydraulic cylinder 4 extends into the support plate 104 and is fixedly connected to the guide plate 108.
[0051] When the hydraulic cylinder 4 is activated, the hydraulic rod 401 is stretched, which can drive the guide plate 108 to move closer to the other guide plate 108 along the limit bar 109. When the hydraulic rod 401 is retracted, it can drive the guide plate 108 to move away from the other guide plate 108 along the limit bar 109. By adjusting the position of the two guide plates 108, the purpose of guiding steel strips of different widths can be achieved.
[0052] The working principle of this embodiment is as follows: When guiding the stamped steel strip, two hydraulic cylinders 4 are activated, and two hydraulic rods 401 stretch or contract, causing two guide plates 108 to move closer or further apart along the limit strip 109. The position of the two guide plates 108 can be adjusted according to the width of the steel strip to guide steel strips of different widths. When the steel strip is added, it first moves to below rubber roller 1031, and after being pressed by rubber roller 1031, it moves taut and then between rubber roller 2 105 and rubber roller 3 106 above the guide table 102. Motor 1052 is then activated, and the output end of motor 1052... The rotation drives the second rubber roller 105 to rotate, and the first gear 1051 will also rotate accordingly. Since the first gear 1051 and the second gear 1061 mesh, the reverse rotation of the second gear 1061 drives the third rubber roller 106 to rotate in the opposite direction. Under the relative rotation of the second rubber roller 105 and the third rubber roller 106, the steel strip is pushed between the two sets of fourth rubber rollers 107. When passing through the gap between the second rubber roller 105 and the third rubber roller 106 and the gap between the two sets of fourth rubber rollers 107, under the squeezing action of these rubber rollers, the steel strip is flattened and then horizontally guided through the gap between the guide plates 108 before entering the stamping machine 2 for stamping. Specific Implementation Example 2
[0053] Please see Figure 1 , Figure 2 and Figure 7 Based on the first specific embodiment, two support frames 205 are fixedly connected to the upper part of the side of the workbench 201 away from the guide machine 1. A rubber roller 2051 is arranged between the two support frames 205. The two ends of the rubber roller 2051 are rotatably connected to the two support frames 205 respectively. The winding machine 3 includes a rotating shaft 303. Four winding arc plates 304 are fixedly connected in a ring array around the rotating shaft 303.
[0054] The workbench 201 provides a working space for the stamping operation and also provides support for the stamping machine 2. After the stamping operation is completed, the steel strip first moves to the bottom of the rubber roller 2051. Then, after being pressed by the rubber roller 2051 and becoming taut, it moves to the position of the winding machine 3. The rotating shaft 303 of the winding machine 3 drives the winding arc plate 304 to rotate, completing the winding of the steel strip scrap. Since the steel strip is wound in a taut state, the wound steel strip is more compact and occupies less space.
[0055] Among them, such as Figure 1 , Figure 2 and Figure 7As shown, the stamping machine 2 also includes an L-shaped body 202, an upper stamping assembly 203 and a lower stamping assembly 204. The bottom end of the lower stamping assembly 204 is fixedly connected to the top end of the worktable 201. The top end of the upper stamping assembly 203 is fixed to the bottom surface of the horizontal part of the body 202, and the upper stamping assembly 203 is located above the lower stamping assembly 204.
[0056] The machine body 202 is the main structure of the stamping machine 2. When stamping is performed, the upper stamping component 203 moves downward to the surface of the lower stamping component 204. When the upper stamping component 203 and the lower stamping component 204 are close together, the stamping work on the steel strip can be completed.
[0057] Among them, such as Figure 1 , Figure 2 and Figure 8 As shown, the winding machine 3 also includes a frame 301, which is rotatably connected to a rotating shaft 303. A second motor 302 is fixedly connected to the side of the frame 301 away from the rotating shaft 303. The end of the rotating shaft 303 near the frame 301 extends out of the frame 301 and is connected to the second motor 302 for transmission.
[0058] The frame 301 provides support for the entire winding machine 3, enabling the winding machine 3 to work normally and stably. When collecting steel strip scrap, the second motor 302 is started. The output end of the second motor 302 rotates, driving the rotating shaft 303 to rotate, which in turn drives the winding arc plate 304 to rotate, thus winding up the stamped steel strip scrap.
[0059] The working principle of this embodiment is as follows: After the steel strip is guided, it moves to the upper stamping assembly 204. When the stamping work is performed, the upper stamping assembly 203 moves downward to the surface of the lower stamping assembly 204. When the upper stamping assembly 203 and the lower stamping assembly 204 tend to be in a close fit, the stamping work on the steel strip can be completed. After the stamping work is completed, the steel strip moves to the lower part of the rubber roller 2051. After being pressed by the rubber roller 2051 and becoming taut, it moves to the position of the winding machine 3. The motor 302 is started. The output end of the motor 302 rotates, driving the rotating shaft 303 and the winding arc plate 304 to rotate and wind up the stamped steel strip waste.
[0060] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.
Claims
1. A stamping steel strip guiding device, comprising a guiding machine (1), a stamping machine (2), and a winding machine (3); characterized in that: The press (2) is located between the guide (1) and the winding machine (3); The guide machine (1) includes a guide platform (102). Two support plates (104) are fixedly connected to the top two sides of the guide platform (102). Rubber roller 2 (105) and rubber roller 3 (106) are arranged above the guide platform (102) between the two support plates (104). Rubber roller 2 (105) is located directly above rubber roller 3 (106). Two rubber roller 4 (107) are also arranged at the same height as rubber roller 2 (105) and rubber roller 3 (106) on the guide platform (102) on the side of the press (2) near the rubber roller 2 (105) and rubber roller 3 (106). The two ends of the rubber roller four (107) are rotatably connected to the two support plates (104) respectively. Two limiting strips (109) are also provided above the guide platform (102) between the two support plates (104). The two ends of the two limiting strips (109) are fixedly connected to the two support plates (104) respectively. The lower part of the side of the two limiting strips (109) that are close to each other is provided with a groove. Two guide plates (108) are provided between the two limiting strips (109). The two guide plates (108) are provided with protrusions on both sides of the ends of the two guide plates (108) that are close to the two limiting strips (109). The two guide plates (108) are respectively inserted and fixed into the grooves of the two limiting strips (109) through the protrusions. The press (2) includes a worktable (201), the side of the worktable (201) near the guide machine (1) is fixedly connected to the guide table (102), and the upper part of the side of the worktable (201) away from the guide machine (1) is fixedly connected to two support frames (205). A rubber roller (2051) is provided between the two support frames (205). The two ends of the rubber roller (2051) are rotatably connected to the two support frames (205). The winding machine (3) includes a rotating shaft (303), and four winding arc plates (304) are fixedly connected in a ring array around the rotating shaft (303).
2. The stamping steel strip guide device according to claim 1, characterized in that: The guide machine (1) also includes two legs (101), the top of the two legs (101) are fixedly connected to the guide table (102), and a support frame (103) is fixedly connected to the upper part of the side of the two legs (101) away from the press (2). A rubber roller (1031) is rotatably connected between the opposite surfaces of the two support frames (103).
3. The stamping steel strip guide device according to claim 1, characterized in that: One end of the second rubber roller (105) is fixedly connected to a gear (1051), and the end of the third rubber roller (106) near the gear (1051) is fixedly connected to a gear (1061). The gear (1051) and the gear (1061) mesh. The outside of the support plate (104) away from the gear (1051) is fixedly connected to a motor (1052). The output end of the motor (1052) extends into the support plate (104) and is connected to the end of the second rubber roller (105) away from the gear (1051).
4. The stamping steel strip guide device according to claim 1, characterized in that: Hydraulic cylinders (4) are fixedly connected to the two support plates (104) on opposite sides. A hydraulic rod (401) is movably connected to the telescopic end of the hydraulic cylinder (4). The end of the hydraulic rod (401) away from the hydraulic cylinder (4) extends into the support plate (104) and is fixedly connected to the guide plate (108).
5. The stamping steel strip guide device according to claim 1, characterized in that: The stamping machine (2) also includes an L-shaped body (202), an upper stamping assembly (203) and a lower stamping assembly (204). The bottom end of the lower stamping assembly (204) is fixedly connected to the top end of the worktable (201). The top end of the upper stamping assembly (203) is fixed to the bottom surface of the horizontal part of the body (202), and the upper stamping assembly (203) is located above the lower stamping assembly (204).
6. The stamping steel strip guide device according to claim 1, characterized in that: The winding machine (3) also includes a frame (301), which is rotatably connected to a rotating shaft (303). A motor (302) is fixedly connected to the side of the frame (301) away from the rotating shaft (303). The end of the rotating shaft (303) near the frame (301) extends out of the frame (301) and is connected to the motor (302) in a transmission connection.