Water pump connecting device

Abstract

The invention relates to the technical field of water pumps, in particular to a water pump connecting device, which comprises a main body mechanism, a water pump main body and a connector arranged on the water pump main body, the connecting mechanism comprises a first connecting piece and a second connecting piece, the first connecting piece is connected with the connector, the second connecting piece is connected with the pipe body, the first connecting piece is connected with the second connecting piece in an inserted mode, and the second connecting piece is connected with the pipe body in an inserted mode. The first connecting piece comprises a first connecting shell, a second connecting shell arranged on the first connecting shell and a third connecting shell arranged on the second connecting shell; the first connecting shell and the second connecting shell are integrally formed and are matched with the first connecting piece through the fifth connecting shell and the second abutting rod, so that rapid insertion connection of the pipe body and the water pump is achieved; the connecting efficiency is improved, and meanwhile the problems that welding is not uniform possibly occurring in hot melting connection or dust adheres to mucilage glue in the gluing process, and viscidity is reduced are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of water pumps, and in particular to a water pump connecting device. Background Art

[0002] Traditional water pipes are mostly plastic pipes, which are hot-melt connected and glued to the water inlet of the water pump. However, the effect of hot-melt connection is not ideal and it is not easy to disassemble. During the gluing process, it is necessary to brush glue first and then put it on. In this process, the glue is not only easily contaminated with dust, but also the glue will be exposed for a period of time, which will cause the viscosity to decrease, and it is not easy to disassemble. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the problem that the water inlet of the above-mentioned existing water pump is connected by hot-melt connection and adhesive connection, and the effect of hot-melt connection is not ideal, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a water pump connection device.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a main body mechanism, including a water pump body and a connecting head arranged on the water pump body; a connecting mechanism, including a first connecting piece and a second connecting piece, the first connecting piece is connected to the connecting head, the second connecting piece is connected to the pipe body, and the first connecting piece and the second connecting piece are plugged into each other.

[0007] As a preferred solution of the water pump connecting device of the present invention, wherein: the first connecting member includes a first connecting shell, a second connecting shell arranged on the first connecting shell and a third connecting shell arranged on the second connecting shell; the first connecting shell and the second connecting shell are integrally formed.

[0008] As a preferred solution of the water pump connecting device of the present invention, wherein: the first connecting shell end is fixedly connected with a first interference rod, the side wall of the first interference rod is provided with an interference block, and the end of the first interference rod away from the first connecting shell end is an inner arc shape.

[0009] As a preferred solution of the water pump connecting device of the present invention, wherein: the first contact rods are provided in multiple groups, the first contact rods are evenly distributed with the central axis of the first connecting shell as the center of the circle, and the contact blocks are provided in multiple groups, and the contact blocks are arc-shaped.

[0010] As a preferred solution of the water pump connecting device of the present invention, a spring is arranged on the outer wall of the second connecting shell, the bottom end of the second connecting shell is fixedly connected to the third connecting shell, and the end of the third connecting shell away from the spring is fixedly connected to a limiting ring.

[0011] As a preferred solution of the water pump connecting device described in the present invention, wherein: the outer wall of the third connecting shell is fixedly connected to the fourth connecting shell, the fourth connecting shell includes a horizontal section and a raised section fixedly connected to the horizontal section, the convex surface of the raised section is in contact with the outer wall of the second connecting shell, and the end of the raised section away from the third connecting shell is provided with an arc surface; one end of the horizontal section is in contact with the outer wall of the third connecting shell, and the limiting ring is used to limit the fourth connecting shell; the end of the third connecting shell is connected to the connecting head.

[0012] As a preferred solution of the water pump connecting device of the present invention, the fourth connecting shell has a certain elasticity, and the raised section forms a receiving cavity with the ends of the third connecting shell and the second connecting shell.

[0013] As a preferred solution of the water pump connecting device of the present invention, the spring is arranged in the accommodating cavity, one end of the spring is connected to the raised section, and the other end of the spring is connected to the end of the third connecting shell.

[0014] As a preferred solution of the water pump connecting device described in the present invention, wherein: the second connecting member includes a fifth connecting shell and a second interference rod arranged on the first connecting shell, the diameter of the outer wall of the fifth connecting shell is the same as the diameter of the outer wall of the second connecting shell, the fifth connecting shell is provided with a through groove, the diameter of the through groove is the same as the diameter of the inner wall of the first connecting shell; a first plug-in space is formed between the fifth connecting shell and the second interference rod, and the first plug-in space is used for plugging with the tube body; the end of the second interference rod away from the fifth connecting shell is an inner arc shape, and the second interference rod has a certain elasticity.

[0015] As a preferred solution of the water pump connecting device of the present invention, wherein: the length of the first interference rod is greater than the length of the second interference rod, when the first connecting shell and the fifth connecting shell are plugged into each other through the first interference rod, the first interference rod and the second interference rod fit together.

[0016] The beneficial effects of the present invention are as follows: through the fifth connecting shell and the second abutment rod, in cooperation with the first connecting piece, quick plug-in of the pipe body and the water pump is achieved, the connection efficiency is improved, and the problems of uneven welding or dust contamination and reduced viscosity of the adhesive during the gluing process, which may occur in the hot-melt connection, are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 It is a schematic diagram of the connection state of the water pump connection device of the present invention.

[0019] Figure 2 The overall structure of the water pump connection device of the present invention is shown in FIG. Figure 1 .

[0020] Figure 3 It is a cross-sectional view of the overall structure of the water pump connecting device of the present invention.

[0021] Figure 4 The overall structure of the water pump connection device of the present invention is shown in FIG. Figure 2 .

[0022] In the figure: 100, main body; 101, water pump body; 102, connector; 200, connecting mechanism; 201, first connecting member; 201a, first connecting shell; 201b, second connecting shell; 201c, third connecting shell; 201d, fourth connecting shell; 201e, first interference rod; 201f, interference block; 201g, spring; 201h, limit ring; 201i, raised section; 202, second connecting member; 202a, fifth connecting shell; 202b, second interference rod; 202c, through groove; 202d, first plug-in space; X, tube body. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0027] Example 1, reference Figure 1 to Figure 2 , which is the first embodiment of the present invention, provides a water pump connecting device, including a main mechanism 100, including a water pump body 101 and a connecting head 102 arranged on the water pump body 101; a connecting mechanism 200, including a first connecting member 201 and a second connecting member 202, the first connecting member 201 is connected to the connecting head 102, the second connecting member 202 is connected to the pipe body X, and the first connecting member 201 and the second connecting member 202 are plugged into each other.

[0028] Specifically, the first connecting member 201 includes a first connecting shell 201a, a second connecting shell 201b disposed on the first connecting shell 201a, and a third connecting shell 201c disposed on the second connecting shell; the first connecting shell 201a and the second connecting shell 201b are integrally formed.

[0029] It should be noted that the main body 100 plays the role of the core framework in the present invention, which includes a water pump body 101 and a connecting head 102 arranged on the water pump body 101. The water pump body 101 is the fixed part of the connecting device, which is responsible for being directly connected to the water pump and providing support and positioning for the entire connecting device. The connecting head 102 is a specific structure on the water pump body 101, which is used to connect to the first connecting member 201 in the connecting mechanism 200. It is the key interface for realizing the connection between the water pump and the pipe body X.

[0030] The connecting mechanism 200 is an important component for realizing the connection between the water pump and the pipe body X, and includes a first connecting member 201 and a second connecting member 202. The first connecting member 201 is connected to the connector 102, and plays the role of connecting the water pump body 101 with the pipe body X. The second connecting member 202 is directly connected to the pipe body X, and through plug-in cooperation with the first connecting member 201, the pipe body X and the water pump are quickly connected and sealed.

[0031] Specifically speaking, the structure of the first connecting member 201 includes a first connecting shell 201a, a second connecting shell 201b and a third connecting shell 201c. This layered structural design enables the first connecting member 201 to have better strength and stability, while also providing multiple mating surfaces for the connection process, thereby enhancing the sealing and reliability of the connection. The one-piece molding design of the first connecting shell 201a and the second connecting shell 201b means that the two components are processed as a whole during the manufacturing process. Such a setting can reduce the number of assembled parts, improve the integrity of the structure and the stability of the connection. The one-piece molding also helps to reduce production costs and assembly time, while ensuring that the connecting parts are evenly distributed when subjected to force, avoiding stress concentration, thereby improving the durability and service life of the entire connecting device.

[0032] Example 2, reference Figures 1 to 4 This embodiment is different from the first embodiment in that a first resistance rod 201e is fixedly connected to the end of the first connecting shell 201a, a resistance block 201f is provided on the side wall of the first resistance rod 201e, and the end of the first resistance rod 201e away from the end of the first connecting shell 201a is in an inner arc shape.

[0033] Specifically, a plurality of first resisting rods 201e are provided, and the first resisting rods 201e are evenly distributed with the central axis of the first connecting shell 201a as the center of the circle. A plurality of resisting blocks 201f are provided, and the resisting blocks 201f are arc-shaped.

[0034] The outer wall of the second connection shell 201b is provided with a spring 201g, the bottom end of the second connection shell 201b is fixedly connected to the third connection shell 201c, and one end of the third connection shell 201c away from the spring 201g is fixedly connected to the limiting ring 201h.

[0035] Furthermore, the outer wall of the third connecting shell 201c is fixedly connected to the fourth connecting shell 201d, and the fourth connecting shell 201d includes a horizontal section and a raised section 201i fixedly connected to the horizontal section, the convex surface of the raised section 201i is in contact with the outer wall of the second connecting shell 201b, and an arc surface is provided at one end of the raised section 201i away from the third connecting shell 201c; one end of the horizontal section is in contact with the outer wall of the third connecting shell 201c, and the limiting ring 201h is used to limit the fourth connecting shell 201d; the end of the third connecting shell 201c is connected to the connecting head 102.

[0036] Furthermore, the fourth connecting shell 201d has a certain elasticity, and the protruding section 201i and the ends of the third connecting shell 201c and the second connecting shell 201b form a receiving cavity.

[0037] Furthermore, the spring 201g is disposed in the accommodating cavity, one end of the spring 201g is connected to the raised section 201i, and the other end of the spring 201g is connected to the end of the third connecting shell 201c.

[0038] It should be noted that the first abutment rod 201e fixedly connected to the end of the first connection shell 201a and the abutment block 201f on its side wall, as well as the inner arc design of the first abutment rod 201e away from the end of the first connection shell 201a, together constitute the key sealing and fixing components in the connection device. The multiple groups of the first abutment rods 201e and the uniform distribution with the central axis of the first connection shell 201a as the center of the circle ensure that the connection device is subjected to balanced forces when subjected to forces in different directions, and enhance the stability and sealing of the connection. The arc design of the abutment block 201f enables it to fit tightly with the second connection member 202 during the connection process, providing additional friction and preventing the connection part from loosening.

[0039] The spring 201g disposed on the outer wall of the second connection shell 201b provides elastic force for the connection device, which helps to buffer the impact force during the connection process and also helps to maintain a close fit between the first connection member 201 and the second connection member 202. The fixed connection between the bottom end of the second connection shell 201b and the third connection shell 201c, and the limiting ring 201h at one end of the third connection shell 201c away from the spring 201g, ensure the stability of the connection device in the axial direction and prevent excessive displacement.

[0040] The fourth connection shell 201d, which is fixedly connected to the outer wall of the third connection shell 201c, includes a horizontal section and a raised section 201i. The convex surface of the raised section 201i contacts the outer wall of the second connection shell 201b. This design enables the fourth connection shell 201d to fit tightly with the second connection shell 201b to form an effective seal. The arc surface design of the raised section 201i away from one end of the third connection shell 201c helps to make a smooth transition during the connection process and reduce wear. The horizontal section contacts the outer wall of the third connection shell 201c, and the limit ring 201h is used to limit the fourth connection shell 201d, ensuring the radial stability of the fourth connection shell 201d.

[0041] The fourth connection shell 201d has a certain elasticity, and the accommodating cavity formed by the protruding section 201i and the third connection shell 201c and the end of the second connection shell 201b provides an installation space for the spring 201g. The spring 201g is arranged in the accommodating cavity, one end of which is connected to the protruding section 201i, and the other end is connected to the end of the third connection shell 201c. This design enables the spring 201g to play its buffering and fastening role in the connection device, thereby enhancing the reliability and stability of the connection.

[0042] The rest of the structure is the same as that of Example 1.

[0043] Example 3, reference Figures 1 to 4, this embodiment is different from the above embodiments in that: the second connecting member 202 includes a fifth connecting shell 202a and a second interference rod 202b arranged on the first connecting shell 201a, the diameter of the outer wall of the fifth connecting shell 202a is the same as the diameter of the outer wall of the second connecting shell 201b, the fifth connecting shell 202a is provided with a through groove 202c, the diameter of the through groove 202c is the same as the diameter of the inner wall of the first connecting shell 201a; a first plug-in space 202d is formed between the fifth connecting shell 202a and the second interference rod 202b, and the first plug-in space 202d is used for plugging with the tube body X; the end of the second interference rod 202b away from the fifth connecting shell 202a is an inner arc shape, and the second interference rod 202b has a certain elasticity.

[0044] Specifically, the length of the first resisting rod 201e is greater than that of the second resisting rod 202b. When the first connecting shell 201a and the fifth connecting shell 202a are plugged together through the first resisting rod 201e, the first resisting rod 201e and the second resisting rod 202b are in close contact with each other.

[0045] It should be noted that the second connector 202 includes a fifth connector shell 202a and a second abutment rod 202b in order to achieve rapid and stable plugging with the tube body X. The diameter of the fifth connector shell 202a is the same as that of the second connector shell 201b. This design ensures the matching and sealing between the connectors, so that the second connector 202 can be closely matched with the first connector 201. The through groove 202c provided on the fifth connector shell 202a has a diameter that is the same as that of the inner wall of the first connector shell 201a. This arrangement allows the first abutment rod 201e of the first connector shell 201a to be smoothly inserted, thereby achieving mechanical plugging between the two connectors.

[0046] The second resisting rod 202b in the second connecting member 202 is arranged on the first connecting shell 201a, and its inner arc design and certain elasticity at one end away from the fifth connecting shell 202a enable the second resisting rod 202b to be elastically deformed when the first resisting rod 201e is inserted, so as to fit tightly with the first resisting rod 201e. This design not only provides an additional sealing effect, but also enhances the stability of the connection and prevents the connection from being loosened due to external force.

[0047] Specifically, the length of the first abutment rod 201e is greater than the length of the second abutment rod 202b. This design enables the first abutment rod 201e to penetrate into the inner arc-shaped end of the second abutment rod 202b when the first connection shell 201a and the fifth connection shell 202a are plugged together through the first abutment rod 201e, so that the two abutment rods can fit closely together. This plug-in method not only ensures the firmness of the connection, but also provides a self-locking mechanism through the elastic effect of the abutment rod, making the connection between the pipe body X and the water pump more reliable.

[0048] The rest of the structure is the same as that of Example 2.

[0049] Operation process: When the initial state is set, the first connecting member 201 is connected to the connecting shell of the water pump body through the end of the third connecting shell 201c. When the water pump needs to be connected to the pipe body X, the pipe body X is first inserted into the first insertion space 202d between the fifth connecting rod and the second contact rod 202b along the arc surface of the second contact rod 202b. At this time, the second contact rod 202b is tightly fitted with the inner wall of the pipe body X;

[0050] Next, the first abutting rod 201e at the end of the first connecting shell 201a is inserted from its inner arc end into the through slot 202c of the fifth connecting shell 202a. Since the length of the first abutting rod 201e is greater than the length of the second abutting rod 202b, when the first abutting rod 201e is fully inserted into the through hole, the first abutting rod 201e squeezes the inner arc of the end of the second abutting rod 202b, so that the second abutting rod 202b fits tightly with the tube body X. At the same time, the abutting block 201f at the end of the first abutting rod 201e tightly abuts the second abutting rod 202b, so that the second abutting rod 202b is slightly deformed in the direction of the tube body X by the squeezing force of the abutting block 201f, thereby increasing the squeezing force and friction between the tube body X and the second abutting rod 202b. At this time, the end of the fifth connecting shell 202a simultaneously abuts against the ends of the first connecting shell 201a and the second connecting shell 201b.

[0051] Finally, the raised section 201i on the fourth connecting shell 201d is moved along the outer wall of the second connecting shell 201b to the outer wall of the fifth connecting shell 202a, and finally the end of the raised section 201i on the fourth connecting shell 201d contacts the end of the fifth connecting shell 202a away from the through groove 202c. At this time, the outer walls of the first connecting member 201 and the second connecting member 202 are engaged with each other through the fourth connecting shell 201d and the fifth connecting shell 202a, and the inner walls of the first connecting member 201 and the second connecting member 202 are plugged into each other through the first resistance rod 201e and the second resistance rod 202b. At this point, the tube body X is tightly squeezed by the first resistance rod 201e and the second resistance rod 202b to fit with the inner wall of the fifth connecting shell 202a, and the connection between the tube body X and the water pump is completed.

[0052] Compared with the prior art which uses hot melting to connect the water pump to the pipe body X, the present invention is easy to operate as a whole and is convenient for assembly and disassembly.

[0053] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0054] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0055] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A water pump connection device, characterized in that: include, A main body mechanism (100) comprises a water pump body (101) and a connector (102) arranged on the water pump body (101); The connecting mechanism (200) comprises a first connecting member (201) and a second connecting member (202), wherein the first connecting member (201) is connected to the connecting head (102), the second connecting member (202) is connected to the tube body (X), and the first connecting member (201) and the second connecting member (202) are plugged into each other.

2. The water pump connection device according to claim 1, characterized in that: The first connecting member (201) comprises a first connecting shell (201a), a second connecting shell (201b) arranged on the first connecting shell (201a), and a third connecting shell (201c) arranged on the second connecting shell; The first connecting shell (201a) and the second connecting shell (201b) are integrally formed.

3. The water pump connection device according to claim 2, characterized in that: A first interference rod (201e) is fixedly connected to the end of the first connecting shell (201a), a side wall of the first interference rod (201e) is provided with an interference block (201f), and one end of the first interference rod (201e) away from the end of the first connecting shell (201a) is in an inner arc shape.

4. The water pump connection device according to claim 3, characterized in that: The first resistance rods (201e) are provided in multiple groups, and the first resistance rods (201e) are evenly distributed with the central axis of the first connection shell (201a) as the center of the circle. The resistance blocks (201f) are provided in multiple groups, and the resistance blocks (201f) are arc-shaped.

5. The water pump connection device according to claim 4, characterized in that: The outer wall of the second connecting shell (201b) is provided with a spring (201g), the bottom end of the second connecting shell (201b) is fixedly connected to the third connecting shell (201c), and one end of the third connecting shell (201c) away from the spring (201g) is fixedly connected to a limiting ring (201h).

6. The water pump connection device according to claim 5, characterized in that: The outer wall of the third connecting shell (201c) is fixedly connected to a fourth connecting shell (201d), the fourth connecting shell (201d) comprising a horizontal section and a raised section (201i) fixedly connected to the horizontal section, the convex surface of the raised section (201i) being in contact with the outer wall of the second connecting shell (201b), and an arc surface is provided at one end of the raised section (201i) away from the third connecting shell (201c); One end of the horizontal section is in contact with the outer wall of the third connecting shell (201c); the limiting ring (201h) is used to limit the fourth connecting shell (201d); and the end of the third connecting shell (201c) is connected to the connecting head (102).

7. The water pump connection device according to claim 6, characterized in that: The fourth connecting shell (201d) has a certain elasticity, and the protruding section (201i) forms a receiving cavity with the ends of the third connecting shell (201c) and the second connecting shell (201b).

8. The water pump connection device according to claim 7, characterized in that: The spring (201g) is arranged in the accommodating cavity, one end of the spring (201g) is connected to the raised section (201i), and the other end of the spring (201g) is connected to the end of the third connecting shell (201c).

9. The water pump connection device according to claim 8, characterized in that: The second connecting member (202) comprises a fifth connecting shell (202a) and a second abutting rod (202b) arranged on the first connecting shell (201a); the diameter of the outer wall of the fifth connecting shell (202a) is the same as the diameter of the outer wall of the second connecting shell (201b); the fifth connecting shell (202a) is provided with a through groove (202c); the diameter of the through groove (202c) is the same as the diameter of the inner wall of the first connecting shell (201a); A first plug-in space (202d) is formed between the fifth connecting shell (202a) and the second abutting rod (202b), and the first plug-in space (202d) is used for plugging with the tube body (X); One end of the second abutting rod (202b) away from the fifth connecting shell (202a) is in an inner arc shape, and the second abutting rod (202b) has a certain elasticity.

10. The water pump connection device according to claim 9, characterized in that: The length of the first interference rod (201e) is greater than the length of the second interference rod (202b), and when the first connecting shell (201a) and the fifth connecting shell (202a) are plugged together through the first interference rod (201e), the first interference rod (201e) and the second interference rod (202b) fit together.

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