Grinding driving device for neck pressing wheel of horizontal ampoule bottle-making machine

Abstract

The utility model provides a neck pressing wheel polishing driving device of a horizontal ampoule bottle-making machine, which comprises a fixed base movably arranged on a bracket of a forming machine; the supporting connecting plate is rotatably arranged on the fixed base, and a first strip-shaped groove is formed in the supporting connecting plate; the fixing plate is movably arranged on the supporting connecting plate along the first strip-shaped groove, and an adjusting handle is connected to the fixing plate; and the driving wheel and the driving motor are fixed on the fixed plate. The neck pressing wheel grinding device has the beneficial effects of being convenient to disassemble and move, stable, reliable and convenient to machine and manufacture, on one hand, the convenience of neck pressing wheel grinding can be improved, on the other hand, the grinding speed can be accurately controlled, the neck pressing wheel grinding efficiency is improved, and the neck pressing wheel grinding quality is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of ampoule bottle production, and in particular to a neck wheel grinding drive device of a horizontal ampoule bottle making machine. Background Art

[0002] Ampoules are glass containers for holding liquid medicines, with a capacity of 1 to 25 ml. They are often used to store injectable drugs, vaccines, serums, etc., and are also used to package oral liquids. Modern ampoules are fired with glass tubes and are widely used to hold injectable preparations and high-purity chemicals that must be isolated from the air. The nipple of the ampoule is sealed with an open flame to isolate the air, and the neck of the bottle is marked. When pressure is applied, the neck of the bottle will break to extract the liquid medicine.

[0003] Horizontal ampoule machines are often used to produce ampoule bottles. For example, the Chinese utility model patent with publication number CN209583980U discloses a neck pressing device for a horizontal ampoule production line, which includes a frame, a front support shaft, a front support plate, a rear support shaft, a rear support plate, a neck pressing frame, a neck pressing shaft, a neck pressing wheel, a cam, a cam rocker arm, a flame nozzle and a driving mechanism. During the production process, the working temperature of the neck pressing wheel is relatively high. After a period of use, carbon deposits will form on the surface of the neck pressing wheel and other impurities will adhere, making the surface of the neck pressing wheel rough, thereby affecting the molding quality of the ampoule bottle, forming defects such as numb neck and dirt. In order to clean the carbon deposits and other dirt on the surface of the neck pressing wheel and improve the product quality, the neck pressing wheel needs to be polished regularly. Two people are required to cooperate during the polishing operation, one person rotates the neck pressing wheel and the other person uses sandpaper to polish the surface of the neck pressing wheel. Because it is impossible to ensure uniform rotation speed when the neck pressing wheel is rotated manually.

[0004] Therefore, the above solution has the following disadvantages:

[0005] 1. It is time-consuming and laborious. It requires two people to cooperate, one person rotates the neck pressing wheel, and the other person uses sandpaper to grind the neck pressing wheel, which takes a long time;

[0006] 2. The grinding quality is low. It is difficult to ensure the consistency of the rotation speed and achieve the ideal rotation speed when rotating the neck wheel manually, which will cause uneven grinding on the surface of the neck wheel and affect the grinding quality. Utility Model Content

[0007] A technical problem to be solved by the present application is: how to improve the convenience of grinding the neck wheel, accurately control the grinding speed, improve the grinding efficiency of the neck wheel, and ensure the grinding quality of the neck wheel.

[0008] In order to solve the above technical problems, the embodiment of the present application provides a neck wheel grinding drive device for a horizontal ampoule bottle making machine, comprising:

[0009] A fixed base is movably arranged on a bracket of the molding machine;

[0010] A supporting connecting plate is rotatably arranged on the fixed base, and a first strip groove is arranged on the supporting connecting plate;

[0011] A fixed plate, movably disposed on the supporting connecting plate along the first strip groove, and an adjusting handle is connected to the fixed plate;

[0012] The driving wheel and the driving motor are fixed on the fixing plate.

[0013] In some embodiments, the fixed base includes a locking top plate adapted to the bracket of the forming machine and two rotating brackets for connecting the supporting connecting plate. The locking top plate is a U-shaped structure, in which a threaded hole is provided on one of the side plates, and a first locking bolt is connected to a clamping plate through the threaded hole. The clamping plate is located on the inner side of the U-shaped structure of the locking top plate.

[0014] In some embodiments, any of the rotating brackets comprises a rotating connector and two rotating legs disposed below the rotating connector;

[0015] The rotary connector is provided with through holes, and the second locking bolt passes through the two through holes in sequence and is locked by the second locking nut.

[0016] In some embodiments, the end of the supporting connecting plate away from the first strip groove is provided with a rotating end, and the rotating end is provided between the two rotating connectors;

[0017] The rotating end is provided with a reinforcing rib plate.

[0018] In some embodiments, a guide bolt is provided in the middle of the lower surface of the fixing plate, and the guide bolt is movable along the first strip groove.

[0019] In some embodiments, a third locking bolt is disposed at a lower portion of the lower surface of the fixing plate, and the third locking bolt passes through the first strip groove and is locked by a third locking nut.

[0020] In some embodiments, a protective cover is further included, on which a second strip groove for the adjustment handle to move and a third strip groove through which the guide bolt and / or the third locking bolt pass.

[0021] In some embodiments, the driving wheel is configured with a rotating shaft, one end of the rotating shaft is connected to the fixing plate, and the other end is connected to the protective cover, and the driving motor drives the driving wheel through the rotating shaft;

[0022] The driving wheel is a U-shaped structure with an outer circumference portion concave.

[0023] In some embodiments, the adjustment handle includes a handle, a first connecting plate and a second connecting plate, the second connecting plate is fixedly connected to the fixing plate, and the handle is fixedly connected to the second connecting plate through the first connecting plate.

[0024] In some embodiments, a reinforcing plate is further provided between the first connecting plate and the second connecting plate, and an angle a between the handle and the fixing plate satisfies:

[0025] 90°≤a≤150°.

[0026] Through the above-mentioned technical scheme, the neck wheel grinding drive device of the horizontal ampoule bottle making machine provided in the present application, by setting a driving wheel and a driving motor, uses the driving motor to drive the driving wheel to rotate, and the driving wheel is set in contact with the neck wheel, thereby driving the neck wheel to rotate to complete the grinding. At the same time, the position of the driving wheel is adjusted by adjusting the position of the fixed base and the position of the fixed plate by adjusting the adjustment handle. It has the characteristics of easy disassembly and movement, stability and reliability, and easy processing and manufacturing. On the one hand, it can improve the convenience of neck wheel grinding, and on the other hand, it can also accurately control the grinding speed, improve the neck wheel grinding efficiency, and ensure the neck wheel grinding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a three-dimensional diagram of a neck pressing wheel grinding drive device of a horizontal ampoule bottle making machine disclosed in an embodiment of the present application;

[0029] Figure 2 It is a schematic diagram of the installation of a neck pressing wheel grinding drive device of a horizontal ampoule bottle making machine disclosed in an embodiment of the present application;

[0030] Figure 3 It is a top view of the grinding drive device for the neck pressing wheel of the horizontal ampoule bottle making machine disclosed in the embodiment of the present application;

[0031] Figure 4 is a three-dimensional diagram of a fixed base disclosed in an embodiment of the present application;

[0032] Figure 5 It is a schematic diagram of assembling the supporting connecting plate and the fixing plate disclosed in the embodiment of the present application;

[0033] Figure 6 This is a schematic diagram of the assembly of the supporting connecting plate and the fixing plate from another angle disclosed in the embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. Fixed base; 2. Support connecting plate; 3. Fixed plate; 4. Adjustment handle; 5. Driving wheel; 6. Driving motor; 7. Protective cover; 101. Locking top plate; 102. Rotating bracket; 103. First locking bolt; 104. Second locking bolt; 201. First strip groove; 301. Guide bolt; 302. Third locking bolt; 401. Handle; 402. First connecting plate; 403. Second connecting plate; 404. Reinforcement plate; 701. Second strip groove; 702. Third strip groove. DETAILED DESCRIPTION

[0036] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0037] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0038] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0039] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0040] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0041] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0042] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0043] like Figures 1 to 6 As shown, the present application provides a neck wheel grinding drive device for a horizontal ampoule bottle making machine, comprising:

[0044] A fixed base 1 is movably arranged on a bracket of the molding machine;

[0045] The supporting connecting plate 2 is rotatably arranged on the fixed base 1, and a first strip groove 201 is arranged on the supporting connecting plate 2;

[0046] The fixing plate 3 is movably arranged on the supporting connecting plate 2 along the first strip groove 201, and the fixing plate 3 is connected with an adjusting handle 4;

[0047] The driving wheel 5 and the driving motor 6 are fixed on the fixing plate 3 .

[0048] like Figure 2As shown, the molding machine is used for the molding of the body of the ampoule bottle, and the post-processing machine is used for the processes of notching, dotting, bottle bottom molding, and stress relief annealing. The main dimensions of the ampoule bottle include the outer neck of the wire, the outer neck of the bubble, the outer neck of the neck, and the total height of the bottle. In the molding process of the ampoule bottle, the neck pressing wheel has an important influence on the molding of the wire, bubble, and neck. The neck pressing wheel grinding drive device of the horizontal ampoule bottle making machine is provided with a driving wheel 5 and a driving motor 6, and the driving motor 6 drives the driving wheel 5 to rotate. The driving wheel 5 is arranged in contact with the neck pressing wheel, thereby driving the neck pressing wheel to rotate and complete the grinding. At the same time, by adjusting the position of the fixed base 1 and adjusting the position of the fixed plate 3 by using the adjusting handle 4, the position of the driving wheel 5 is adjusted. It has the characteristics of easy disassembly and movement, stability and reliability, and is easy to process and manufacture. On the one hand, it can improve the convenience of grinding the neck pressing wheel, and on the other hand, it can also accurately control the grinding speed, improve the grinding efficiency of the neck pressing wheel, and ensure the grinding quality of the neck pressing wheel.

[0049] In some embodiments, the fixed base 1 includes a locking top plate 101 adapted to the bracket of the molding machine and two rotating brackets 102 for connecting the supporting connecting plate 2. The locking top plate 101 is a U-shaped structure, one of the side plates is provided with a threaded hole, and the first locking bolt 103 is connected with a clamping plate through the threaded hole. The clamping plate is located on the inner side of the U-shaped structure of the locking top plate 101. The opening direction of the locking top plate 101 of the U-shaped structure faces the bracket of the molding machine, and a clamping plate is provided on the inner side. The clamping plate is locked to the bracket of the molding machine by the first locking bolt 103 to complete the fixation of the grinding drive device.

[0050] As for the fixed base 1, its main function is to install and fix the neck wheel grinding drive device on the molding machine so as to perform the grinding work of the neck wheel. Since multiple neck wheels are installed on the molding machine, each neck wheel needs to be polished during the neck wheel grinding operation, and the grinding drive device needs to be shifted multiple times to complete one grinding work. After the grinding is completed, in order not to hinder the adjustment of the molding machine, the grinding drive device needs to be disassembled. Therefore, the present application adopts the structural form of the locking top plate 101 and the rotating bracket 102, which has a simple structure and is easy to operate, and can meet the use requirements of quick disassembly.

[0051] In some embodiments, any of the rotating brackets 102 includes a rotating connector and two rotating legs disposed below the rotating connector, and the two rotating legs and the horizontal portion of the locking top plate 101 form a triangular structure, which has strong stability;

[0052] A through hole is provided on the rotating connector, and the second locking bolt 104 passes through the two through holes in sequence and is locked by the second locking nut. When the second locking nut is locked, the support connecting plate 2 can be locked on the rotating connector; when the second locking nut is loosened, the position of the driving wheel 5 is adjusted by rotating the support connecting plate 2, so that the grinding drive device can adapt to neck wheels of more angles.

[0053] The second locking bolt 104 is a bolt which is smooth in the middle and has threads at the bottom.

[0054] In some embodiments, a rotating end is provided at one end of the supporting connecting plate 2 away from the first strip groove 201, and the rotating end is provided between two rotating connectors;

[0055] The rotating end is provided with a reinforcing rib plate, and the rotating end is a cylinder with a through hole. The second locking bolt 104 passes through the through hole of the rotating connector, the through hole of the cylinder and the through hole of another rotating connector in sequence, thereby connecting the support connecting plate 2 with the fixed base 1, so that the support connecting plate 2 can rotate on the fixed base 1.

[0056] In some embodiments, a guide bolt 301 is disposed in the middle of the lower surface of the fixing plate 3 , and the guide bolt 301 is movable along the first strip groove 201 .

[0057] The fixed plate 3, the driving wheel 5 and the driving motor 6 can be regarded as a whole. The lower surface of the fixed plate 3 refers to the surface in contact with the supporting connecting plate 2. A first strip groove 201 is provided on the supporting connecting plate 2. The fixed plate 3, the driving wheel 5 and the driving motor 6 are pulled along the first strip groove 201 by adjusting the handle 4.

[0058] In some embodiments, a third locking bolt 302 is provided at the lower portion of the lower surface of the fixing plate 3. The third locking bolt 302 passes through the first strip groove 201 and is locked by a third locking nut. By cooperating with the third locking bolt 302 and the third locking nut, the position of the fixing plate 3 can be fixed and locked.

[0059] like Figure 1 As shown, in some embodiments, a protective cover 7 is further included, on which a second strip groove 701 for the adjustment handle 4 to move and a third strip groove 702 through which the common guide bolt 301 and / or the third locking bolt 302 pass are provided.

[0060] In some embodiments, the driving wheel 5 is provided with a rotating shaft, one end of the rotating shaft is connected to the fixing plate 3, and the other end is connected to the protective cover 7, and the driving motor 6 drives the driving wheel 5 through the rotating shaft;

[0061] The driving wheel 5 is a U-shaped structure with an outer circumference portion concave.

[0062] The edge profile of the neck pressing wheel is a U-shaped structure. In order to ensure that there is a large contact area between the driving wheel 5 and the neck pressing wheel, and to generate a greater friction force so that the neck pressing wheel rotates more smoothly, the outer edge of the driving wheel 5 is designed as a concave U-shaped structure, so that the driving wheel 5 can wrap the neck pressing wheel to increase the friction force. In order to prevent the driving wheel 5 from scratching the surface of the neck pressing wheel, the driving wheel 5 can be made of rubber material, which can improve the friction force while protecting the neck pressing wheel. In addition, due to the small size of the neck pressing wheel, the space left for installing the grinding drive device is limited. It is necessary to reduce the size of the driving device as much as possible. The driving motor 6 and the driving wheel 5 are installed and placed in parallel, and the two are connected by a synchronous belt. Not only can the volume of the entire device be reduced, but also it can be ensured that the driving motor 6 and the driving wheel 5 bracket will not slip, resulting in a reduction in driving kinetic energy, and effectively ensure the grinding quality.

[0063] In some embodiments, the adjustment handle 4 includes a handle 401 , a first connecting plate 402 and a second connecting plate 403 , the second connecting plate 403 is fixedly connected to the fixing plate 3 , and the handle 401 is fixedly connected to the second connecting plate 403 via the first connecting plate 402 .

[0064] In some embodiments, a reinforcing plate 404 is further provided between the first connecting plate 402 and the second connecting plate 403, which can enhance the connection strength between the first connecting plate 402 and the second connecting plate 403. The angle a between the handle 401 and the fixing plate 3 satisfies: 90°≤a≤150°. At this angle, it is easier for the operator to adjust the position of the fixing plate 3.

[0065] In general, the main function of the supporting connecting plate 2, the fixing plate 3 and the adjusting handle 4 is to adjust the distance between the driving wheel 5 and the neck wheel. When the neck wheel grinding drive device of the present application is used, the driving wheel 5 and the neck wheel need to be in contact with each other, with the driving wheel 5 as the driving wheel and the neck wheel as the driven wheel, and the driving wheel 5 is used to drive the neck wheel to rotate, so as to meet the kinetic energy requirement of grinding the neck wheel. The driving wheel 5 and the neck wheel need to be in contact with each other to ensure that there is an appropriate distance between the driving wheel 5 and the neck wheel to ensure that there is an appropriate contact pressure between the two. If the distance between the driving wheel 5 and the neck wheel is too large, the contact pressure will be too small, resulting in slippage between the driving wheel 5 and the neck wheel during the grinding process, and the neck wheel cannot form an effective rotation, and the normal grinding process cannot be carried out. If the distance between the driving wheel 5 and the neck wheel is too small, the contact pressure between the two will be too large, resulting in excessive friction between the neck wheel and the neck wheel mounting shaft, resulting in the neck wheel being unable to rotate and being stuck, and the driving wheel 5 cannot be adjusted between the neck wheel and the fixed component and cannot work normally.

[0066] Therefore, the distance between the driving wheel 5 and the neck pressing wheel is adjusted by adjusting the handle 4, the rotatable supporting link plate 2 and the movably fixed plate 3, and the position of the adjusting assembly is fixed by the locking nut after being adjusted to a suitable position.

[0067] The working process of this application is as follows:

[0068] First, move the adjustment handle 4 toward the driving wheel 5, adjust the position of the fixing plate 3 to adjust the driving wheel 5 to the corresponding position of the neck pressing wheel, so that the neck pressing wheel grinding drive device is set between the fixing base 1 and the neck pressing wheel. After adjusting the installation position, pull the adjustment handle 44 toward the fixing base 1, so that the driving wheel 5 firmly presses the neck pressing wheel to form a good contact between the driving wheel 5 and the neck pressing wheel, and then fix the installation position of the entire grinding device by means of the locking nuts.

[0069] Then, the driving motor 6 is started, and the driving wheel 5 drives the neck pressing wheel to rotate synchronously under the driving action of the synchronous belt. At this time, the neck pressing wheel has the ability to rotate automatically, and the operator can grind the neck pressing wheel that needs to be polished by using a grinding tool such as sandpaper until it meets the practical requirements.

[0070] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0071] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A neck wheel grinding drive device for a horizontal ampoule bottle making machine, characterized in that: include: A fixed base (1) is movably arranged on a bracket of the molding machine; A supporting connecting plate (2) is rotatably arranged on the fixed base (1), and a first strip groove (201) is arranged on the supporting connecting plate (2); A fixed plate (3) is movably arranged on the supporting connecting plate (2) along the first strip groove (201), and an adjusting handle (4) is connected to the fixed plate (3); The driving wheel (5) and the driving motor (6) are fixed on the fixing plate (3).

2. The grinding drive device for the neck pressing wheel of the horizontal ampoule bottle making machine according to claim 1, characterized in that: The fixed base (1) comprises a locking top plate (101) adapted to the bracket of the molding machine and two rotating brackets (102) for connecting the supporting connecting plate (2), wherein the locking top plate (101) is a U-shaped structure, wherein a threaded hole is provided on one of the side plates, and a first locking bolt (103) passes through the threaded hole and is connected to a clamping plate, wherein the clamping plate is located on the inner side of the U-shaped structure of the locking top plate (101).

3. The grinding drive device for the neck pressing wheel of the horizontal ampoule bottle making machine according to claim 2, characterized in that: Any of the rotating brackets (102) comprises a rotating connector and two rotating legs arranged below the rotating connector; The rotary connector is provided with through holes, and the second locking bolt (104) passes through the two through holes in sequence and is locked by the second locking nut.

4. The grinding drive device for the neck pressing wheel of the horizontal ampoule bottle making machine according to claim 3 is characterized in that: The end of the supporting connecting plate (2) away from the first strip-shaped groove (201) is provided with a rotating end, and the rotating end is arranged between the two rotating connectors; The rotating end is provided with a reinforcing rib plate.

5. The grinding drive device for the neck pressing wheel of the horizontal ampoule bottle making machine according to claim 1, characterized in that: A guide bolt (301) is provided in the middle of the lower surface of the fixing plate (3), and the guide bolt (301) is movable along the first strip groove (201).

6. The grinding drive device for the neck pressing wheel of the horizontal ampoule bottle making machine according to claim 5, characterized in that: A third locking bolt (302) is provided at the lower portion of the lower surface of the fixing plate (3); the third locking bolt (302) passes through the first strip-shaped groove (201) and is locked by a third locking nut.

7. The grinding drive device for the neck pressing wheel of the horizontal ampoule bottle making machine according to claim 6, characterized in that: It also comprises a protective cover (7), on which a second strip groove (701) for the adjustment handle (4) to move and a third strip groove (702) through which the guide bolt (301) and / or the third locking bolt (302) pass are provided.

8. The grinding drive device for the neck pressing wheel of the horizontal ampoule bottle making machine according to claim 7, characterized in that: The driving wheel (5) is provided with a rotating shaft, one end of the rotating shaft is connected to the fixing plate (3), and the other end is connected to the protective cover (7), and the driving motor (6) drives the driving wheel (5) via the rotating shaft; The driving wheel (5) is a U-shaped structure with an outer circumference portion concave.

9. The grinding drive device for the neck pressing wheel of the horizontal ampoule bottle making machine according to claim 1, characterized in that: The adjustment handle (4) comprises a handle (401), a first connecting plate (402) and a second connecting plate (403); the second connecting plate (403) is fixedly connected to the fixing plate (3); and the handle (401) is fixedly connected to the second connecting plate (403) via the first connecting plate (402).

10. The grinding drive device for the neck pressing wheel of the horizontal ampoule bottle making machine according to claim 9, characterized in that: A reinforcing plate (404) is further provided between the first connecting plate (402) and the second connecting plate (403), and an angle a between the handle (401) and the fixing plate (3) satisfies: 90°≤a≤150°。

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