Ferrite magnetic stripe forming device

Abstract

The invention provides a ferrite magnetic stripe forming device, and belongs to the technical field of machinery. A ferrite magnetic stripe forming device comprises a first shell, the first shell is cylindrical, the axis of the first shell is horizontally arranged, a first cavity and a second cavity are formed in the first shell, the first cavity is located under the second cavity, a plurality of discharging ports communicated with the first cavity are formed in the first shell, and the discharging ports are communicated with the first cavity. A feeding hole communicated with the first cavity is formed in one side of the first shell; an inlet communicated with the second cavity is formed in the upper end of the first shell, an outlet communicated with the second cavity is formed in one side of the first shell, an inclined plane is arranged at the bottom of the second cavity, and the height of the inclined plane is gradually increased in the direction from the position close to the outlet to the position away from the outlet.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology, in particular to a ferrite magnetic strip forming device. Background Art

[0002] During processing, ferrite powder needs to be poured into a mold first, then pressed into shape by a press, and finally formed through a sintering process. However, traditional equipment can only press one part at a time during the pressing process. After the previous molded part is pushed out, powder must be added again before the next pressing can be performed, resulting in low molding efficiency. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems in the prior art and to provide a ferrite magnetic strip forming device, which has the characteristic of forming multiple pieces of ferrite at the same time.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A ferrite magnetic strip forming device, comprising:

[0006] A first shell, wherein the first shell is cylindrical and the axis of the first shell is arranged horizontally, wherein a first chamber and a second chamber are arranged in the first shell, wherein the first chamber is located directly below the second chamber, wherein a plurality of discharge ports communicating with the first chamber are provided on the first shell, and a feed port communicating with the first chamber is provided on one side of the first shell; an inlet communicating with the second chamber is provided on the upper end of the first shell, and an outlet communicating with the second chamber is provided on one side of the first shell, and an inclined surface is provided at the bottom of the second chamber, wherein the inclined surface gradually increases in height from close to the outlet toward away from the outlet;

[0007] A second shell capable of rotating relative to the first shell, the second shell being arranged outside the first shell, the second shell being cylindrical, and the first shell and the second shell being arranged coaxially; the inner wall of the first shell being in contact with the outer wall of the second shell; a plurality of receiving grooves along the axis of the second shell being provided on the inner wall of the second shell, a plurality of pressing blocks being slidably connected in each receiving groove, a receiving cavity for receiving powder being formed between adjacent pressing blocks, and the receiving cavity being able to communicate with the discharge port; a guide hole being provided on the second shell and being connected with the receiving groove, the pressing block being provided with a guide block, the guide block passing through the guide hole and being able to move in the guide hole, and the pressing block blocking the guide hole;

[0008] A press, the press is arranged on one side of the first shell, the press has a die, and when the accommodating cavity is not connected to the discharge port of the first shell, the die can extrude the pressing block in the accommodating groove to extrude and shape the powder in the accommodating cavity;

[0009] The positioning assembly is used to drive the guide block to move, so as to drive the pressing block to move and open the accommodating cavity to the maximum accommodating cavity.

[0010] In the above-mentioned ferrite magnetic strip forming device, the positioning assembly includes a first cylinder, a connecting rod and a plurality of push blocks, the connecting rod is fixed on the piston rod of the first cylinder, the push block is fixed on the connecting rod, and the push block can be abutted against the guide block to move the slider on the guide block and open the accommodating cavity to the maximum accommodating cavity.

[0011] In the above-mentioned ferrite magnetic strip forming device, the guide hole has a first limiting surface and a second limiting surface. When the guide block abuts against the first limiting surface, the accommodating cavity is maintained at the maximum capacity. When the guide block abuts against the second limiting surface, the accommodating cavity is maintained at the minimum capacity.

[0012] In the above-mentioned ferrite magnetic strip forming device, when the guide block abuts against the first limiting surface, the opening size of the accommodating cavity formed between the two pressing blocks is consistent with the size of the discharge port.

[0013] In the above-mentioned ferrite magnetic strip forming device, a feeding device is also included, and the feeding device is used to send the magnetic strip in the accommodating chamber into the second chamber; the feeding device includes a second cylinder, a pressure plate and a plurality of ejectors, and the second shell is provided with a plurality of through-hole structures, the through-hole structure includes a first through-hole and a second through-hole, the diameter of the first through-hole is larger than the second through-hole, and a limiting step is formed between the first through-hole and the second through-hole, the ejector includes a first section of needles and a second section of needles, the first section of needles is adapted to the first through-hole, and the second section of needles is adapted to the second through-hole, the ejector is arranged in the through-hole structure, and the second section of needles is against the limiting step, and the inner end of the first section of needles is kept flush with the bottom wall of the accommodating groove; the outer end of the second section of needles extends into the first through-hole, and a compression spring is fixed on the second section of needles, and the other end of the compression spring is against the outer wall of the second shell, and the compression spring is used to move the ejector toward a direction away from the accommodating groove, and the pressure plate is fixed on the piston rod of the second cylinder, and the pressure plate can squeeze the second section of needles so that the first end of the ejector extends into the accommodating groove.

[0014] In the above-mentioned ferrite magnetic strip forming device, an extrusion block is fixed to the outer end of the second section of needles.

[0015] The ferrite magnetic strip forming device further comprises a driving motor, a gear ring is fixed on the second shell, a gear is fixed on the output shaft of the driving motor, and the gear is meshed with the gear ring.

[0016] Compared with the prior art, this application has the following advantages:

[0017] The control of the guide block and the pressing block and the rotation of the second shell realize the automatic connection of powder filling, molding, discharging and other processes, which reduces manual intervention, reduces labor costs and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a cross-sectional structure in this application;

[0019] Figure 2 yes Figure 1 Structural diagram of the middle A direction;

[0020] Figure 3 It is a schematic diagram of the local structure after the ejector pin is removed in this application;

[0021] In the figure,

[0022] 2. first housing; 21. first chamber; 211. discharge port; 212. feed port; 22. second chamber; 221. inlet port; 222. outlet port; 223. inclined surface;

[0023] 3. Second housing; 33. Accommodating groove; 331. Accommodating cavity; 332. Guide hole; 3321. First limiting surface; 3322. Second limiting surface; 34. Press block; 341. Guide block; 35. Through hole structure; 351. First through hole; 352. Second through hole; 353. Limiting step;

[0024] 4. Press; 41. Die;

[0025] 5. Positioning assembly; 51. First cylinder; 52. Connecting rod; 53. Push block;

[0026] 6. Feeding device; 61. Second cylinder; 62. Pressing plate; 63. Ejector pin; 631. First needle section; 632. Second needle section; 633. Extrusion block; 64. Compression spring;

[0027] 7. Driving motor;

[0028] 8. Gear ring;

[0029] 9. Gears. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figures 1 to 3As shown, a ferrite magnetic strip forming device includes: a first shell 2, a second shell 3 that can rotate relative to the first shell 2, a press 4, and a positioning assembly 5. The first shell 2 is cylindrical and the axis of the first shell 2 is horizontally arranged. The first shell 2 has a first chamber 21 and a second chamber 22, and the first chamber 21 is located directly below the second chamber 22. The first shell 2 is provided with a plurality of discharge ports 211 connected to the first chamber 21, and one side of the first shell 2 is provided with a feed port 212 connected to the first chamber 21; the upper end of the first shell 2 has an inlet 221 connected to the second chamber 22, and the one side of the first shell 2 is provided with an outlet 222 connected to the second chamber 22, and the bottom of the second chamber 22 is provided with an inclined surface 223, and the inclined surface 223 has a height that gradually increases from close to the outlet 222 to away from the outlet 222; the second shell 3 is arranged on the outside of the first shell 2, the second shell 3 is cylindrical, and the first shell 2 and the second shell 3 is coaxially arranged; the inner wall of the first shell 2 contacts the outer wall of the second shell 3; a plurality of accommodating grooves 33 along the axis of the second shell 3 are provided on the inner wall of the second shell 3, a plurality of pressing blocks 34 are slidably connected in each accommodating groove 33, and a accommodating cavity 331 for accommodating powder is formed between adjacent pressing blocks 34, and the accommodating cavity 331 can be communicated with the discharge port 211; a guide hole 332 communicating with the accommodating groove 33 is provided on the second shell 3, and a guide block 341 is provided on the pressing block 34, and the guide block 341 passes through The pressing block 34 passes through the guide hole 332 and can move in the guide hole 332, and the pressing block 34 blocks the guide hole 332; the pressing machine 4 is arranged on one side of the first shell 2, and the pressing machine 4 has a pressing die 41. When the accommodating cavity 331 is not connected with the discharge port 211 of the first shell 2, the pressing die 41 can extrude the pressing block 34 in the accommodating groove 33 to extrude the powder in the accommodating cavity 331; the positioning assembly 5 is used to drive the guide block 341 to move, so as to drive the pressing block 34 to move and enable the accommodating cavity 331 to open to the maximum cavity.

[0032] Here’s how this application works:

[0033] The ferrite powder first enters the first chamber 21 smoothly through the feed port 212 on one side of the first shell 2. Subsequently, the positioning assembly 5 begins to function, driving the guide block 341 to move. Since the guide block 341 is connected to the pressing block 34, the pressing block 34 will slide accordingly in the receiving groove 33, causing the receiving cavity 331 formed between adjacent pressing blocks 34 to gradually expand to the maximum cavity state. During this process, the receiving cavity 331 is connected to the discharge port 211, and the powder in the first chamber 21 naturally flows into the receiving cavity 331 under the action of gravity or other driving force, thereby realizing quantitative filling of the powder.

[0034] Then the second shell 3 is rotated to disconnect the accommodating chamber 331 from the discharge port 211. Then, the die 41 of the press 4 moves quickly to apply a stable and uniform pressure to the pressing block 34 in the accommodating groove 33, so that the powder in the accommodating chamber 331 is tightly squeezed under the strong pressure and gradually formed into a magnetic strip with a specific shape and structure. When the forming process is successfully completed, the die 41 of the press 4 smoothly withdraws from the accommodating groove 33 to make room for subsequent steps.

[0035] At this time, the first shell 2 starts to perform precise rotational motion relative to the second shell 3 until the formed accommodating cavity 331 is precisely docked and connected with the inlet 221 of the second chamber 22. In this state, the formed magnetic strip smoothly enters the second chamber 22 from the inlet 221 due to its own gravity and possible slight external disturbances, and slowly flows out along the cleverly designed inclined surface 223 at the bottom of the second chamber 22, finally completing the entire forming and discharging process, realizing efficient, continuous and stable ferrite magnetic strip production operations.

[0036] The control of the guide block 341 and the pressing block 34 by the positioning assembly 5 and the rotation of the shell realizes the automatic connection of the powder filling, molding, discharging and other processes, reduces manual intervention, reduces labor costs and improves production efficiency.

[0037] Specifically, the positioning assembly 5 includes a first cylinder 51, a connecting rod 52 and a plurality of push blocks 53. The connecting rod 52 is fixed on the piston rod of the first cylinder 51, and the push blocks 53 are fixed on the connecting rod 52. The push blocks 53 can abut against the guide block 341 to move the slider on the guide block 341 and open the accommodating cavity 331 to the maximum accommodating cavity.

[0038] When it is necessary to open the accommodating chamber 331 to the maximum capacity, the first cylinder 51 is started, and its piston rod extends to drive the connecting rod 52 to move. Since the push block 53 is fixed on the connecting rod 52, the movement of the connecting rod 52 will cause the push block 53 to move synchronously and gradually approach the guide block 341. When the push block 53 abuts against the guide block 341, as the push block 53 continues to push, the slider on the guide block 341 starts to move, and the guide block 341 is connected to the pressing block 34, thereby driving the pressing block 34 to slide in the accommodating groove 33, so that the accommodating chamber 331 between adjacent pressing blocks 34 gradually becomes larger until it reaches the maximum capacity state, so that the powder in the first chamber 21 can be quantitatively and smoothly introduced into the accommodating chamber 331.

[0039] Specifically, the guide hole 332 has a first limiting surface 3321 and a second limiting surface 3322. When the guide block 341 abuts against the first limiting surface 3321, the accommodating cavity 331 is maintained at the maximum capacity. When the guide block 341 abuts against the second limiting surface 3322, the accommodating cavity 331 is maintained at the minimum capacity.

[0040] The first limit surface 3321 and the second limit surface 3322 of the guide hole 332 provide a clear limit position for the guide block 341, thereby ensuring that the accommodating chamber 331 can accurately switch between the maximum capacity and the minimum capacity. In the powder filling stage, the accommodating chamber 331 is in the maximum capacity, and the amount of powder entering can be accurately controlled to ensure that the amount of raw materials for each molded magnetic strip is consistent, which is beneficial to improving the uniformity and stability of product quality; in the molding stage, the accommodating chamber 331 switches to the minimum capacity, which can effectively compact the powder in a suitable space to ensure molding accuracy.

[0041] Specifically, when the guide block 341 abuts against the first limiting surface 3321 , the opening size of the accommodating cavity 331 formed between the two pressing blocks 34 is consistent with the size of the discharge port 211 .

[0042] When the guide block 341 abuts against the first limiting surface 3321 and the opening size of the accommodating cavity 331 is consistent with the size of the discharge port 211, it can ensure that the formed magnetic strip is not hindered during the discharge process and maintains a stable discharge posture, and will not cause problems such as jamming, deformation or poor discharge due to mismatch of the opening size.

[0043] Specifically, it also includes a feeding device 6, which is used to feed the magnetic strip in the accommodating cavity 331 into the second chamber 22; the feeding device 6 includes a second cylinder 61, a pressure plate 62 and a plurality of ejector pins 63, and a plurality of through-hole structures 35 are provided on the second shell 3, and the through-hole structure 35 includes a first through-hole 351 and a second through-hole 352, and the diameter of the first through-hole 351 is larger than that of the second through-hole 352, and a limiting step 353 is formed between the first through-hole 351 and the second through-hole 352, and the ejector pin 63 includes a first section needle 631 and a second section needle 632, and the first section needle 631 is adapted to the first through-hole 351, and the second section needle 632 is adapted to The second through hole 352, the ejector pin 63 is arranged in the through hole structure 35, and the second section needle 632 abuts against the limiting step 353, the inner end of the first section needle 631 is kept flush with the bottom wall of the accommodating groove 33; the outer end of the second section needle 632 extends into the first through hole 351, and a compression spring 64 is fixed on the second section needle 632, and the other end of the compression spring 64 abuts against the outer wall of the second shell 3, and the compression spring 64 is used to move the ejector pin 63 in the direction away from the accommodating groove 33, and the pressure plate 62 is fixed on the piston rod of the second cylinder 61, and the pressure plate 62 can squeeze the second section needle 632 so that the first end of the ejector pin 63 extends into the accommodating groove 33.

[0044] In the initial state, the ejector pin 63 is in a relatively balanced position under the action of the compression spring 64. Due to the elastic force of the compression spring 64, the second needle 632 of the ejector pin 63 abuts against the limiting step 353 formed between the first through hole 351 and the second through hole 352, and the inner end of the first needle 631 of the ejector pin 63 is kept flush with the bottom wall of the receiving groove 33. At this time, the ejector pin 63 does not exert force on the magnetic strip in the receiving cavity 331. When it is necessary to send the formed magnetic strip in the receiving cavity 331 into the second chamber 22, the second cylinder 61 starts to work, and the piston rod of the second cylinder 61 extends, driving the pressure plate 62 fixed thereon to move. The pressure plate 62 gradually approaches and squeezes the second needle 632 of the ejector pin 63, overcoming the elastic force of the compression spring 64, so that the ejector pin 63 moves toward the receiving groove 33, and the first needle 631 of the ejector pin 63 extends into the receiving groove 33. As the ejector pin 63 The first needle 631 continues to go deeper into the accommodating groove 33, and it will contact the magnetic strip that has been formed in the accommodating cavity 331, and exert an outward thrust on the magnetic strip, pushing the magnetic strip from the accommodating cavity 331 to the direction of the second chamber 22. Due to the positional relationship of the first shell 2 relative to the second shell 3 and the setting of the through-hole structure 35, the magnetic strip will eventually be smoothly sent into the second chamber 22 through the corresponding channel to complete the unloading operation. When the piston rod of the second cylinder 61 retracts, the pressure plate 62 no longer exerts an extruding force on the second needle 632 of the ejector pin 63. Under the elastic force of the compression spring 64, the ejector pin 63 moves in the direction away from the accommodating groove 33, returns to its initial position, and waits for the next unloading operation instruction. This cycle is repeated to achieve a continuous unloading process.

[0045] Specifically, an extrusion block 633 is fixed to the outer end of the second needle section 632 .

[0046] The presence of the squeeze block 633 increases the force area when in contact with the pressing plate 62. When the second cylinder 61 drives the pressing plate 62 to squeeze the ejector pin 63, the larger contact area can make the pressure more evenly distributed on the ejector pin 63, reducing the risk of deformation or damage of the ejector pin 63 due to local stress concentration.

[0047] Specifically, it also includes a driving motor 7 , a gear ring 8 is fixed on the second housing 3 , a gear 9 is fixed on the output shaft of the driving motor 7 , and the gear 9 is meshed with the gear ring 8 .

[0048] When the first shell 2 is required to rotate relative to the second shell 3, the drive motor 7 is started, and the output shaft of the drive motor 7 drives the gear 9 to rotate. Since the gear 9 is meshed with the toothed ring 8 fixed on the second shell 3, during the rotation of the gear 9, the toothed ring 8 will rotate accordingly with the meshing transmission of the gear 9, thereby driving the second shell 3 to rotate. This rotational movement can achieve functions such as connecting or disconnecting the formed accommodating cavity 331 with the discharge port 211 or other related structures, so as to complete the discharge of the magnetic strip, the cleaning of the accommodating cavity 331 or the relative movement requirements of the shells in other process steps.

[0049] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship and movement status of the components in a certain specific posture, as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0050] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is that it includes three schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0051] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0052] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A ferrite magnetic strip forming device, characterized in that: include: A first shell (2), the first shell (2) is cylindrical and the axis of the first shell (2) is arranged horizontally, the first shell (2) has a first chamber (21) and a second chamber (22), the first chamber (21) is located directly below the second chamber (22), the first shell (2) is provided with a plurality of discharge ports (211) connected to the first chamber (21), and one side of the first shell (2) is provided with a feed port (212) connected to the first chamber (21); the upper end of the first shell (2) has an inlet (221) connected to the second chamber (22), and one side of the first shell (2) is provided with an outlet (222) connected to the second chamber (22), and the bottom of the second chamber (22) is provided with an inclined surface (223), and the inclined surface (223) gradually increases in height from the direction close to the outlet (222) to the direction away from the outlet (222); A second shell (3) capable of rotating relative to the first shell (2), the second shell (3) being arranged outside the first shell (2), the second shell (3) being cylindrical, the first shell (2) and the second shell (3) being arranged coaxially; the inner wall of the first shell (2) is in contact with the outer wall of the second shell (3); the inner wall of the second shell (3) is provided with a plurality of accommodating grooves (33) along the axis of the second shell (3), each accommodating groove (33) being slidably connected with a plurality of pressure-sensitive adhesives (33) A pressing block (34) is provided, wherein a receiving cavity (331) for receiving powder is formed between adjacent pressing blocks (34), and the receiving cavity (331) can be communicated with the discharge port (211); a guide hole (332) communicated with the receiving groove (33) is opened on the second shell (3), and the pressing block (34) has a guide block (341), and the guide block (341) passes through the guide hole (332) and can move in the guide hole (332), and the pressing block (34) blocks the guide hole (332); A press (4), the press (4) being arranged on one side of the first shell (2), the press (4) having a pressing die (41), and when the accommodating cavity (331) is not connected to the discharge port (211) of the first shell (2), the pressing die (41) is capable of pressing the pressing block (34) in the accommodating groove (33) so as to extrude and shape the powder in the accommodating cavity (331); A positioning assembly (5), wherein the positioning assembly (5) is used to drive the guide block (341) to move, so as to drive the pressing block (34) to move and open the accommodating cavity (331) to a maximum accommodating cavity.

2. The ferrite magnetic strip forming device according to claim 1, characterized in that: The positioning assembly (5) comprises a first cylinder (51), a connecting rod (52) and a plurality of push blocks (53); the connecting rod (52) is fixed on the piston rod of the first cylinder (51); the push blocks (53) are fixed on the connecting rod (52); the push blocks (53) can abut against the guide block (341) to move the slider on the guide block (341) and open the accommodating cavity (331) to the maximum accommodating cavity.

3. The ferrite magnetic strip forming device according to claim 1, characterized in that: The guide hole (332) has a first limiting surface (3321) and a second limiting surface (3322); when the guide block (341) abuts against the first limiting surface (3321), the accommodating cavity (331) is maintained at a maximum accommodating cavity; when the guide block (341) abuts against the second limiting surface (3322), the accommodating cavity (331) is maintained at a minimum accommodating cavity.

4. The ferrite magnetic strip forming device according to claim 3, characterized in that: When the guide block (341) abuts against the first limiting surface (3321), the opening size of the accommodating cavity (331) formed between the two pressing blocks (34) is consistent with the size of the discharge port (211).

5. The ferrite magnetic strip forming device according to claim 1, characterized in that: The invention also comprises a feeding device (6), wherein the feeding device (6) is used for feeding the magnetic strip in the accommodating cavity (331) into the second cavity (22); the feeding device (6) comprises a second cylinder (61), a pressure plate (62) and a plurality of ejector pins (63); a plurality of through hole structures (35) are provided on the second shell (3); the through hole structures (35) comprise a first through hole (351) and a second through hole (352); the diameter of the first through hole (351) is larger than that of the second through hole (352); a limiting step (353) is formed between the first through hole (351) and the second through hole (352); the ejector pin (63) comprises a first section of needles (631) and a second section of needles (632); the first section of needles (631) is adapted to fit the first through hole (351); the second section of needles (632) is adapted to fit the first through hole (351); A second through hole (352), the ejector pin (63) is arranged in the through hole structure (35), and the second section needle (632) abuts against the limiting step (353), and the inner end of the first section needle (631) is kept flush with the bottom wall of the accommodating groove (33); the outer end of the second section needle (632) extends into the first through hole (351), and a compression spring (64) is fixed on the second section needle (632), and the other end of the compression spring (64) abuts against the outer wall of the second shell (3), and the compression spring (64) is used to move the ejector pin (63) in a direction away from the accommodating groove (33), and the pressure plate (62) is fixed on the piston rod of the second cylinder (61), and the pressure plate (62) can squeeze the second section needle (632) so that the first end of the ejector pin (63) extends into the accommodating groove (33).

6. The ferrite magnetic strip forming device according to claim 5, characterized in that: An extrusion block (633) is fixed to the outer end of the second needle section (632).

7. The ferrite magnetic strip forming device according to claim 1, characterized in that: It also comprises a driving motor (7), a gear ring (8) is fixed on the second housing (3), a gear (9) is fixed on the output shaft of the driving motor (7), and the gear (9) is meshed with the gear ring (8).

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