Plastic skeleton and rubber part

Abstract

The application discloses a plastic framework and a rubber part, and belongs to the technical field of automobile wiring harnesses. The plastic framework comprises a first framework and a second framework, and the first framework and the second framework are connected and surrounded to form a through hole. The first framework and the second framework are separately arranged, so that the wiring harness assembly passability is considered, the first matching surface of the first framework is matched with the second matching surface of the second framework, and the second assembly part of the second framework is in contact with the first assembly surface and the second assembly surface of the first framework, so that the stress transmission path between the second framework and the first framework is increased. Meanwhile, the second assembly surface forms a lateral limiting action on the second assembly part, the displacement of the second framework in the direction perpendicular to the first protrusion extension direction is limited, the cooperation of the first protrusion and the first limiting groove is coordinated, the constraint on the relative movement of the first framework and the second framework is further improved, and the stability of the overall structure is improved.

Description

Technical Field

[0001] This application relates to the field of automotive wiring harness technology, and more particularly to a plastic skeleton and rubber component. Background Technology

[0002] With the development of automotive technology, more and more rubber parts are used in automotive wiring harnesses. Rubber parts usually adopt a combination of rubber sheath and plastic skeleton. The structure of the plastic skeleton will limit the expansion ratio of the entire rubber part. If the plastic skeleton adopts a split structure, its connection position is not reliable and it is easy to detach or loosen, and the structural stability cannot be guaranteed. Utility Model Content

[0003] This application provides a plastic skeleton to solve the technical problem that the connection position of the split plastic skeleton is not reliable, it is easy to detach or loosen, and the structural stability cannot be guaranteed; this application also provides a rubber part.

[0004] Technical solution: This application provides a plastic skeleton, including a first skeleton and a second skeleton, wherein the first skeleton and the second skeleton are connected and enclosed to form a through hole;

[0005] The first frame has a first mating surface on the side facing the second frame. The first frame includes a first assembly part, which is disposed on the first mating surface. The first assembly part includes a first assembly surface, a second assembly surface, and a first protrusion. The first assembly surface is disposed away from the second frame relative to the first mating surface. The second assembly surface connects the first assembly surface and the first mating surface. The first protrusion is disposed on the first assembly surface.

[0006] The second frame has a second mating surface on the side facing the first frame. The second frame includes a second assembly part, which protrudes from the second mating surface and has a first limiting groove.

[0007] The first mating surface is in contact with the second mating surface, the second assembly part is in contact with the first assembly surface and the second assembly surface respectively, and the first protrusion is embedded in the first limiting groove.

[0008] Beneficial effects: By separating the first frame and the second frame, this application ensures the smooth assembly of the wire harness while increasing the stress transmission path between the second frame and the first frame through the fit between the first mating surface of the first frame and the second mating surface of the second frame, and the contact between the second assembly part and the first and second assembly surfaces respectively. At the same time, the cooperation between the first protrusion and the first limiting groove further improves the constraint on the relative movement of the first frame and the second frame, and enhances the stability of the overall structure.

[0009] The rubber component of this application includes the plastic skeleton as described in the above embodiments. Therefore, it can have all the technical features and effects of the plastic skeleton described above, which will not be repeated here. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a three-dimensional structural diagram of the plastic skeleton according to an embodiment of this application;

[0012] Figure 2 This is a top view of the plastic skeleton in the embodiments of this application when it is disassembled;

[0013] Figure 3 This is a top view of the plastic skeleton in an embodiment of this application;

[0014] Figure 4 This is a three-dimensional structural diagram of the first and second skeletons in the plastic skeleton of an embodiment of this application;

[0015] Figure 5 This is an exploded view of the rubber component according to an embodiment of this application, showing the plastic skeleton and the rubber body.

[0016] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle;

[0017] Figure 7 This is a top view of the rubber component according to an embodiment of this application;

[0018] Figure 8 for Figure 7 A magnified view of a portion of point B in the middle.

[0019] Explanation of reference numerals in the attached figures:

[0020] 10. Plastic skeleton; 11. First skeleton; 12. Second skeleton; 100. Through hole; 101. First mating surface; 110. First assembly part; 111. First assembly surface; 112. Second assembly surface; 113. First protrusion; 102. Second mating surface; 120. Second assembly part; 121. First limiting groove; X, first direction; Y, second direction; 114. Third assembly part; 115. Second limiting groove; 122. Fourth assembly part; 123. Third assembly surface; 124. Fourth assembly surface; 125. Second protrusion; Z, thickness direction; 116. First buckle; 117. Fourth limiting groove; 126. Third limiting groove; 127. Second buckle; 103. Wedge structure; 20. Rubber body. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] In the description of this application, it should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, "multiple" means two or more, and "at least one" can refer to one, two, or more, unless otherwise explicitly specified. The terms "first," "second," and "third," etc., are only for the convenience of description and are used to name parts or embodiments by number, and do not imply any order of importance between the parts or embodiments.

[0023] It should also be noted that in the accompanying drawings of this application, the arrow marked X indicates the first direction X or its opposite, the arrow marked Y indicates the second direction Y or its opposite, and the arrow marked Z indicates the thickness direction Z. The introduction of the first direction X, the second direction Y, and the thickness direction Z in the description of this application is to more clearly define the structure and relative positional relationships of the components in the plastic skeleton 10. In actual implementation, the first direction X, the second direction Y, and the thickness direction Z are perpendicular to each other to optimize the layout of the plastic skeleton 10. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular; for example, an angle between 80° and 100° is considered perpendicular.

[0024] It should be understood that the first direction X is one of the length direction and the width direction of the plastic skeleton 10, and the second direction Y is the other of the length direction and the width direction of the plastic skeleton 10.

[0025] As an introduction to the embodiments of this application, with the development of automotive technology, more and more rubber parts are used in automotive wiring harnesses. Rubber parts are usually made by combining a rubber sheath with a plastic skeleton 10. However, the structure of the plastic skeleton 10 will limit the expansion ratio of the entire rubber part. During the wiring harness manufacturing process, if the maximum size of the part that needs to pass through the rubber part exceeds the aperture of the plastic skeleton 10, the wiring harness and the part on it will not be able to pass through the plastic skeleton 10.

[0026] In view of this, embodiments of this application provide a plastic skeleton 10, which aims to solve at least one of the above-mentioned technical problems.

[0027] Please see Figure 1 and Figure 2 As shown, this application embodiment provides a plastic skeleton 10, including a first skeleton 11 and a second skeleton 12. The first skeleton 11 and the second skeleton 12 are connected and enclosed to form a through hole 100. The first skeleton 11 has a first mating surface 101 on the side facing the second skeleton 12. The first skeleton 11 includes a first mounting portion 110, which is disposed on the first mating surface 101. The first mounting portion 110 includes a first mounting surface 111, a second mounting surface 112, and a first protrusion 113. The first mounting surface 111 is opposite to... The first mating surface 101 is located away from the second frame 12. The second assembly surface 112 connects the first assembly surface 111 and the first mating surface 101. A first protrusion 113 is provided on the first assembly surface 111. The second frame 12 has a second mating surface 102 on the side facing the first frame 11. The second frame 12 includes a second assembly part 120, which protrudes from the second mating surface 102 and has a first limiting groove 121. The first mating surface 101 and the second mating surface 102 are in contact (e.g., ...). Figure 3 As shown, the second assembly part 120 contacts the first assembly surface 111 and the second assembly surface 112 respectively, and the first protrusion 113 is embedded in the first limiting groove 121.

[0028] It is important to understand that the plastic skeleton 10 adopts a split structure. During the assembly of the wire harness and the rubber parts, the first skeleton 11 and the second skeleton 12 can be separated, allowing larger parts on the wire harness to pass through smoothly. This solves the problem of parts being unable to pass through due to the fixed hole diameter in the plastic skeleton 10 in traditional structures. At the same time, after assembly, the normal shape and function of the through hole 100 can be ensured through the cooperation of each assembly structure, taking into account both passage and structural stability. The contact between the first mating surface 101 and the second mating surface 102 provides an assembly reference for the first skeleton 11 and the second skeleton 12. At the same time, a stress transmission path is formed between the first mating surface 101 and the second mating surface 102. With the second assembly part 120 contacting the first assembly surface 111, the stress transmission path between the second skeleton 12 and the first skeleton 11 is further increased, preventing structural deformation of either the first skeleton 11 or the second skeleton 12 due to excessive local stress. The second assembly part 120 contacts the second assembly surface 112. The second assembly surface 112 connects the first assembly surface 111 and the first mating surface 101, forming a lateral limiting effect on the second assembly part 120. This restricts the displacement of the second frame 12 in the direction perpendicular to the extension of the first protrusion 113. In conjunction with the cooperation of the first protrusion 113 and the first limiting groove 121, this further improves the constraint on the relative movement of the first frame 11 and the second frame 12, and enhances the stability of the overall structure.

[0029] Please see Figure 3 and Figure 4 As shown, in some embodiments, the first frame 11 and the second frame 12 are arranged along a first direction X; the first frame 11 further includes a third assembly part 114, the first assembly part 110 and the third assembly part 114 are arranged along a second direction Y, the first direction X and the second direction Y intersect, the third assembly part 114 protrudes from the first mating surface 101, and the third assembly part 114 has a second limiting groove 115; the second frame 12 further includes a fourth assembly part 122, the fourth assembly part 122 is disposed on the second mating surface 101. On 02, the fourth assembly part 122 includes a third assembly surface 123, a fourth assembly surface 124, and a second protrusion 125. The third assembly surface 123 is disposed away from the first frame 11 relative to the second mating surface 102. The fourth assembly surface 124 connects the third assembly surface 123 and the second mating surface 102. The second protrusion 125 is disposed on the third assembly surface 123. The third assembly part 114 contacts the third assembly surface 123 and the fourth assembly surface 124 respectively. The second protrusion 125 is embedded in the second limiting groove 115.

[0030] It is important to understand that the first assembly part 110 and the fourth assembly part 122 have the same structure, and the second assembly part 120 and the third assembly part 114 have the same structure. Through the mating relationship between the first assembly part 110 and the second assembly part 120, and the mating relationship between the third assembly part 114 and the fourth assembly part 122, a diagonally intersecting locking structure is formed between the first frame 11 and the second frame 12. This restricts the relative movement of the two frames from different dimensions, significantly reducing the risk of loosening due to unidirectional force and improving the overall structure's resistance to deformation. The contact between the third assembly surface 123 and the third assembly part 114 forms a stress transmission path. The fourth assembly surface 124 connects the third assembly surface 123 and the second mating surface 102, creating a lateral barrier for the third assembly part 114 and restricting its displacement along the direction perpendicular to the extension of the second protrusion 125. By engaging the second protrusion 125 with the second limiting groove 115, and coordinating the engagement of the first protrusion 113 with the first limiting groove 121, a double-locking engagement and multi-directional contact support is formed between the first frame 11 and the second frame 12, further enhancing the anti-detachment capability of the connection structure.

[0031] Through the contact forms of the first assembly part 110 and the second assembly part 120, and the third assembly part 114 and the fourth assembly part 122, a symmetrical support is ultimately formed. The first mating surface 101, the second assembly surface 112 and the first assembly surface 111 form a stepped stress transmission path, and the second mating surface 102, the fourth assembly surface 124 and the third assembly surface 123 form a stepped stress transmission path. The above two sets of stress transmission paths are distributed on different sides (first direction X and second direction Y). With the coordinated positioning and insertion of the protrusion and the limiting groove, a stable structural support is formed between the first frame 11 and the second frame 12, making the connection between the first frame 11 and the second frame 12 tighter and the stress more uniform, avoiding structural failure caused by local stress concentration, and reducing vibration and loosening caused by local gaps.

[0032] Please see Figure 3 As shown, in some embodiments, on a plane perpendicular to the second direction Y, the projections of the second assembly portion 120 and the third assembly portion 114 are located on opposite sides of the first mating surface 101 or the second mating surface 102. It should be understood that the stress points of the first assembly portion 110 and the second assembly portion 120, and the stress points of the third assembly portion 114 and the fourth assembly portion 122, are respectively distributed on opposite sides of the first mating surface 101 / second mating surface 102, forming a double-sided stress-bearing support structure. When the plastic frame 10 is subjected to pressure or tension generated by the wire harness or external vibration, the stress can be dispersed to the entire mating surface through the two assembly portions, avoiding local stress concentration, unilateral deformation under pressure, extending the service life of the plastic frame 10, and improving structural durability.

[0033] It is also important to understand that by forming cross constraints on both sides of the mating surface and in the second direction Y, the combination of the second assembly part 120 and the first assembly part 110 and the combination of the third assembly part 114 and the fourth assembly part 122 respectively provide reverse constraint forces, which enhance the overall torsional resistance, solve the loosening problem caused by the weak torsional resistance of the split frame, and ensure long-term stability of the connection.

[0034] Please see Figure 2 As shown, in some embodiments, the first protrusion 113 is flush with the second assembly portion 120 in the first direction X; or, the second protrusion 125 is flush with the third assembly portion 114 in the first direction X. It should be understood that by aligning the first protrusion 113 with the second assembly portion 120 in the first direction X, the engagement point of the first protrusion 113 and the first limiting groove 121, and the contact point between the second assembly portion 120 and the assembly surface, are collinear in the first direction X. Force can be transmitted along the same axis, reducing the risk of bending moment due to lever arm offset caused by misalignment, reducing stress concentration in local structures, and reducing the risk of fracture or deformation. Similarly, the effect of aligning the second protrusion 125 with the third assembly portion 114 in the first direction X is the same and will not be repeated here.

[0035] Please see Figure 2 As shown, in some embodiments, the first protrusion 113 is flush with the second assembly portion 120 in the first direction X, and the second protrusion 125 is flush with the third assembly portion 114 in the first direction X. It should be understood that by setting the second assembly portion 120 to be flush with the first protrusion 113 and the third assembly portion 114 to be flush with the second protrusion 125 in the first direction X, the stress points of the plastic skeleton 10 in the first direction X are symmetrically distributed. When the skeleton is subjected to torsional force (such as the bending of the wire harness causing the skeleton to rotate around the first direction X), the flush structure on both sides can form symmetrical reverse constraint forces, uniformly offsetting the torsional torque, avoiding separation of the mating surfaces or breakage of the protrusions due to excessive force on one side, and significantly improving the overall torsional resistance and structural rigidity.

[0036] Please see Figure 3As shown, in some embodiments, the second assembly part 120 and the third assembly part 114 are used to form a through hole 100. It should be understood that the second assembly part 120 and the third assembly part 114 integrate the through hole 100 structure with the connecting structure, improving space utilization. The second assembly part 120 and the third assembly part 114 form a rigid connection through the engagement of protrusions and limiting grooves (the first protrusion 113 is embedded in the first limiting groove 121, and the second protrusion 125 is embedded in the second limiting groove 115), and the through hole 100 enclosed by the two parts directly contacts the wire harness, strengthening the structural strength of the edge of the through hole 100 and resisting friction and compression of the wire harness. Combined with the fact that the second assembly part 120 and the third assembly part 114 are distributed in the second direction Y, they form a double-sided clamping structure when enclosing the through hole 100. When the through hole 100 is subjected to radial tension of the internal wire harness, the two side assembly parts can transmit the reaction force through the cooperation of the protrusion and the limiting groove, forming opposing support to resist the expansion deformation of the through hole 100.

[0037] Please see Figure 4 As shown, in some embodiments, the number of first protrusions 113 is at least two, and they are arranged Z-shaped along the thickness direction of the plastic skeleton 10; the number of first limiting grooves 121 is the same as the number of first protrusions 113, and they are arranged in a one-to-one correspondence; and / or, the number of second protrusions 125 is at least two, and they are arranged Z-shaped along the thickness direction of the plastic skeleton 10; the number of second limiting grooves 115 is the same as the number of second protrusions 125, and they are arranged in a one-to-one correspondence. It should be understood that by setting multiple first protrusions 113 in conjunction with multiple first limiting grooves 121, multiple locking is formed, improving the reliability of the connection. Multiple sets of protrusions arranged Z-shaped along the thickness direction can disperse the external force received to multiple contact points, reducing the risk of a single protrusion bearing excessive load and breaking. At the same time, the increased number of protrusions and limiting grooves makes the mechanical locking between the first skeleton 11 and the second skeleton 12 more reliable, and each set of engagement can effectively transmit force, enhancing the overall connection stability.

[0038] Please see Figure 2 and Figure 4As shown, in some embodiments, the first assembly portion 110 further includes a first latch 116, which is arranged along the second direction Y with the first protrusion 113; the second assembly portion 120 further includes a third limiting groove 126, in which the first latch 116 is engaged. And / or, the fourth assembly portion 122 further includes a second latch 127, which is arranged along the second direction Y with the second protrusion 125; the third assembly portion 114 further includes a fourth limiting groove 117, in which the second latch 127 is engaged. It is important to understand that the elastic locking structure formed by the snap-fit ​​and the limiting groove, combined with the rigid mechanical locking formed by the protrusion and the limiting groove, restricts the displacement of the first frame 11 and the second frame 12 through the rigid engagement of the protrusion and the limiting groove. The synergy between the snap-fit ​​and the protrusion restricts the lateral sliding of the first frame 11 and the second frame 12 along the second direction Y. The elastic preload of the snap-fit ​​prevents the separation of the first frame 11 and the second frame 12. The rigid protrusion ensures precise positioning of the frames, preventing large displacements, while the elastic snap-fit ​​generates a continuous preload through deformation, compensating for assembly tolerances and vibration gaps. The combined effect of these two structures ensures connection accuracy and eliminates gaps through elastic force, preventing vibration noise or structural wear caused by hard contact due to rigid fit, significantly improving connection stability during long-term use.

[0039] The second direction Y is the distribution direction of the first assembly part 110 and the third assembly part 114, and it is also a critical direction in which the plastic skeleton 10 is susceptible to external forces (such as lateral forces generated by wire harness twisting). The buckle and the protrusion form a double locking point along this direction. When subjected to the separation force in the second direction Y, the two locking points can share the load (such as the protrusion resisting the main shear force and the buckle resisting the residual tensile force), avoiding the breakage of a single locking point due to concentrated force, and significantly improving the anti-separation ability of the plastic skeleton 10 in the second direction Y. More importantly, when there are two protrusions arranged along the thickness direction Z, and the buckle and the protrusion are arranged along the second direction Y, the buckle and the protrusion form a triangular distribution, further increasing the stability of the connection between the first skeleton 11 and the second skeleton 12.

[0040] Please see Figure 4As shown, in some embodiments, both the first protrusion 113 and the second protrusion 125 are rod-shaped, and the head of the rod-shaped protrusion is a wedge-shaped structure 103. It should be understood that the inclined surface of the wedge-shaped head can play an automatic alignment role during assembly. When there is a slight misalignment between the protrusion and the limiting groove, the wedge-shaped surface will generate a lateral force through contact, guiding the protrusion to slide into the groove, reducing the alignment adjustment time during manual or mechanical assembly and improving assembly efficiency. During assembly, the wedge-shaped head is first easily inserted into the groove with its narrow end. As the protrusion goes deeper, the head width gradually increases and fits tightly against the groove wall, forming a gradually tightening interference fit. The interference generates radial preload, and the self-locking characteristic of the wedge-shaped surface can resist reverse pull-out force, solving the problem of gaps easily caused by vibration in traditional straight-head fits and improving locking reliability.

[0041] Please see Figure 3 As shown, in some embodiments, the first frame 11 and the second frame 12 have the same structure and are centrally symmetrically arranged around the central axis of the through hole 100. It should be understood that the first frame 11 and the second frame 12 share a single mold for production, eliminating the need to develop separate molds for different frames and significantly reducing mold design and manufacturing costs. Because the first frame 11 and the second frame 12 have the same structure and are centrally symmetrical, there is no need to distinguish the front / back or left / right sides of the first / second frame 12 during assembly; they only need to be aligned symmetrically, improving assembly efficiency and facilitating maintenance and replacement. When the plastic frame 10 is subjected to radial force from the wire harness, torque generated by vibration, or external pressure, the two sides of the structure can symmetrically distribute the load, avoiding force concentration on one side, ensuring force balance, and enhancing structural stability.

[0042] Please see Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, this application embodiment also provides a rubber component, including a rubber body 20 and a plastic skeleton 10 as described in the above embodiment, wherein the plastic skeleton 10 is detachably assembled onto the rubber body 20. The rubber component of this application embodiment can have all the technical features and effects of the plastic skeleton 10 described above, which will not be repeated here.

[0043] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0044] The above provides a detailed description of a plastic skeleton and rubber parts provided in the embodiments of this application, and uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A plastic skeleton, characterized in that, include: The first skeleton (11) and the second skeleton (12) are connected and enclosed to form a through hole (100); The first frame (11) has a first mating surface (101) on the side facing the second frame (12). The first frame (11) includes a first assembly part (110), which is disposed on the first mating surface (101). The first assembly part (110) includes a first assembly surface (111), a second assembly surface (112), and a first protrusion (113). The first assembly surface (111) is disposed away from the second frame (12) relative to the first mating surface (101). The second assembly surface (112) connects the first assembly surface (111) and the first mating surface (101). The first protrusion (113) is disposed on the first assembly surface (111). The second frame (12) has a second mating surface (102) on the side facing the first frame (11). The second frame (12) includes a second assembly part (120), which protrudes from the second mating surface (102) and has a first limiting groove (121). The first mating surface (101) is in contact with the second mating surface (102), the second assembly part (120) is in contact with the first assembly surface (111) and the second assembly surface (112) respectively, and the first protrusion (113) is embedded in the first limiting groove (121).

2. The plastic skeleton according to claim 1, characterized in that, The first skeleton (11) and the second skeleton (12) are arranged along the first direction (X); The first frame (11) further includes a third assembly part (114), the first assembly part (110) and the third assembly part (114) are arranged along the second direction (Y), the first direction (X) intersects with the second direction (Y), the third assembly part (114) protrudes on the first mating surface (101), and the third assembly part (114) has a second limiting groove (115); The second frame (12) further includes a fourth assembly part (122), which is disposed on the second mating surface (102). The fourth assembly part (122) includes a third assembly surface (123), a fourth assembly surface (124), and a second protrusion (125). The third assembly surface (123) is disposed away from the first frame (11) relative to the second mating surface (102). The fourth assembly surface (124) connects the third assembly surface (123) and the second mating surface (102). The second protrusion (125) is disposed on the third assembly surface (123). The third assembly part (114) contacts the third assembly surface (123) and the fourth assembly surface (124) respectively, and the second protrusion (125) is embedded in the second limiting groove (115).

3. The plastic skeleton according to claim 2, characterized in that, On a plane perpendicular to the second direction (Y), the projection of the second assembly part (120) and the projection of the third assembly part (114) are located on opposite sides of the first mating surface (101) or the second mating surface (102).

4. The plastic skeleton according to claim 2, characterized in that, The first protrusion (113) and the second assembly part (120) are flush in the first direction (X); And / or, the second protrusion (125) is flush with the third assembly portion (114) in the first direction (X).

5. The plastic skeleton according to claim 4, characterized in that, The second assembly part (120) and the third assembly part (114) are used to form the through hole (100).

6. The plastic skeleton according to claim 2, characterized in that, The number of the first protrusions (113) is at least two, and they are arranged along the thickness direction (Z) of the plastic skeleton (10); The number of the first limiting grooves (121) is the same as the number of the first protrusions (113), and they are set in a one-to-one correspondence; And / or, the number of the second protrusions (125) is at least two, and they are arranged along the thickness direction (Z) of the plastic skeleton (10); The number of the second limiting grooves (115) is the same as the number of the second protrusions (125), and they are set in a one-to-one correspondence.

7. The plastic skeleton according to claim 6, characterized in that, The first assembly part (110) further includes a first buckle (116), the first buckle (116) and the first protrusion (113) being arranged along the second direction (Y); The second assembly part (120) also has a third limiting groove (126), and the first buckle (116) is engaged in the third limiting groove (126); And / or, the fourth assembly part (122) further includes a second latch (127), the second latch (127) and the second protrusion (125) being arranged along the second direction (Y); The third assembly part (114) also has a fourth limiting groove (117), and the second buckle (127) is engaged in the fourth limiting groove (117).

8. The plastic skeleton according to claim 6, characterized in that, The first protrusion (113) and the second protrusion (125) are rod-shaped, and the head of the rod-shaped protrusion is a wedge-shaped structure (103).

9. The plastic skeleton according to any one of claims 1 to 8, characterized in that, The first skeleton (11) has the same structure as the second skeleton (12) and is arranged in a centrally symmetrical manner around the central axis () of the through hole (100).

10. A rubber component, characterized in that, include: Rubber body (20); The plastic frame (10) as described in any one of claims 1 to 9 is detachably mounted on the rubber body (20).

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