Rear-mounted rigid fixing structure
By using a rear-mounted rigid fixing structure, and by utilizing the cooperation between the fixing shell and the threaded insert and the bolt, the problems of complex nut or stud settings and insufficient thread hole rigidity are solved, thus achieving efficient connection and enhanced safety.
Patent Information
- Application Number
- CN202520167507.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Nuts or studs in existing high-voltage distribution boxes are difficult to set precisely, injection molding is complex, the screw hole structure lacks rigidity, the connection is unstable, and there are safety risks.
It adopts a rear-mounted rigid fixing structure, including a fixing shell and a threaded insert. The threaded insert and bolts are used to ensure the stability of the threaded insert position through axial and radial limiting. Metal material is used to enhance rigidity.
This reduces the difficulty and time required for shell fabrication, improves connection efficiency, enhances fixation stability and overall integrity, and ensures safety.
Smart Images
Figure CN223754428U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to high -voltage distribution box technical field, and specifically relates to a rear -mounted rigid fixing structure. BACKGROUND
[0002] In new energy vehicles, the high-voltage distribution box in the battery pack usually contains numerous electronic components such as relays, resistors, current sensors and fuses, in order to ensure that the mechanical performance requirements such as vibration and impact are met, most of the electronic components are installed and fixed by threaded fastening, and threaded fastening positions for electrically connecting peripheral copper bars or wiring terminals need to be reserved on the distribution box, so that usually dozens or even thirty to forty nuts or studs need to be embedded on the plastic shell of the distribution box.
[0003] The numerous nuts or studs are difficult to set accurately, and if the numerous nuts or studs are all integrally formed by injection molding, the difficulty and cost of mold design will be increased, and the placement of numerous nuts or studs will lengthen the overall injection molding time, affecting the injection molding quality. The injection molding process is irreversible, and if the nuts and studs of different specifications are placed incorrectly, the entire shell will be scrapped, further increasing the difficulty and cost of preparation. On the other hand, the fastening tightness between the threaded hole structure and the bolt directly affects the stability of the connection between the parts. Due to the limitation of the material of the injection molding process, the rigidity of the threaded hole structure is usually limited, and the compatibility between the threaded hole structure and the bolt is generally poor, which causes the connection to be prone to gaps, and further prone to breakage under high vibration and high impact force, which is not conducive to the stability of the connection and poses a safety risk. SUMMARY
[0004] The utility model aims at overcoming the shortcomings of the prior art and provides a rear-mounted rigid fixing structure.
[0005] The utility model discloses a rear-mounted rigid fixing structure, which comprises a fixed shell, a threaded insert and a bolt.
[0006] The rear-mounted rigid fixing structure comprises a fixed shell, a threaded insert and a bolt, the fixed shell has a hollow inner cavity, the inner contour of the inner cavity matches the outer contour of the threaded insert, the threaded insert is embedded in the inner cavity from the bottom of the fixed shell, a threaded hole is axially arranged in the threaded insert, a through hole is formed in the top of the fixed shell and communicates with the threaded hole, and the bolt is screwed with the threaded hole to limit the to-be-fixed part between the top of the bolt and the top surface of the fixed shell.
[0007] Preferably, the threaded insert comprises an integrally formed cylinder and a base, the cylinder is coaxially fixed to the top of the base, the threaded hole extends along the axis of the cylinder and the base, the cylinder is embedded in the through hole, and the base is embedded in the inner cavity.
[0008] Preferably, the top of the barrel has an outer edge protruding outwardly from the outer peripheral wall thereof, an annular clamping groove is formed between the top surface of the base and the outer edge, a first limiting step surface protruding outwardly is formed on the inner wall of the through hole, a second limiting step surface is formed at the joint of the through hole and the inner cavity, the barrel is inserted into the through hole from the bottom of the through hole, the first limiting step surface abuts against the top of the annular clamping groove, and the second limiting step surface abuts against the bottom of the annular clamping groove, so as to axially limit the threaded insert.
[0009] Preferably, the inner diameter of the limiting ring gradually decreases from bottom to top, so that the inner peripheral wall of the limiting ring gradually contracts inwardly from bottom to top, and the outer peripheral wall of the outer edge matches the inner peripheral wall of the limiting ring.
[0010] Preferably, the top of the outer edge has a guide angle, and the top of the outer edge is not protruding outwardly from the through hole, and the top of the through hole is a plane.
[0011] Preferably, the base is square, and the inner cavity is square and matches the base.
[0012] Preferably, at least one axial limiting rib is arranged on each side inner wall of the inner cavity, the limiting rib protrudes outwardly from the inner wall of the inner cavity, and each limiting rib abuts against the side wall of the base to radially limit the base.
[0013] Preferably, the bottom of the limiting rib has a guide inclined surface obliquely arranged towards the opening of the bottom of the fixed shell.
[0014] Preferably, the top diameter of the bolt is greater than the rod portion, and a gasket is arranged on the rod portion of the bolt and abuts against the top of the bolt.
[0015] Preferably, the threaded insert is made of metal.
[0016] The beneficial effects of the utility model mainly include:
[0017] 1. The structure of the fixed shell and the threaded insert is embedded, which cooperates with the bolt to form a fixed structure that can fix the to-be-fixed part on the component shell, so that the fixed structure in the scheme can be in the form of being loaded later to cooperate with the component shell, and the component shell itself does not need to be integrally injection molded into the corresponding fixed structure, which greatly reduces the difficulty and time of preparing the component shell, and also facilitates the preparation of the fixed structure itself and improves the connection efficiency between the component shell and the fixed structure.
[0018] 2、The fixed shell is used to limit the position of the threaded insert from axial and radial directions respectively, ensure the constant of the position of the threaded insert, and make the part shell not limit the radial and axial position of the threaded insert, reduce the pressure of the part shell, and then make the part shell not interfere with the threaded insert, to ensure the integrity of the shell as much as possible, ensure the stability of the fixed part while the part shell is not easy to be broken due to the fixed connection between the part shell and the fixed part, ensure the integrity and safety of the whole.
[0019] 3、The fixed structure and the shell can be made respectively, so that the threaded hole composed of the threaded insert does not need to be made of the same material as the shell, so that the threaded insert can be made of metal material, to enhance the rigidity of the threaded hole, make the screw connection between the bolt and the threaded insert more stable, and then enhance the stability of the fixed connection between the part shell and the fixed part. BRIEF DESCRIPTION OF DRAWINGS
[0020] The technical scheme of the utility model will be further described below in combination with the drawings:
[0021] Figure 1 : The schematic view of the embodiment of the utility model;
[0022] Figure 2 : The sectional view of the embodiment of the utility model;
[0023] Figure 3 : Figure 2 : The enlarged schematic view of the A part of the embodiment of the utility model;
[0024] Figure 4 : The schematic view of another angle of the embodiment of the utility model;
[0025] Figure 5 : The schematic view of the threaded insert in the embodiment of the utility model. DETAILED DESCRIPTION
[0026] The utility model will be described in detail below in combination with the specific implementation mode shown in the drawings. But these implementation modes are not limited to the utility model, and the conversion of the structure, method or function made by the ordinary skilled in the art according to these implementation modes is also included in the protection scope of the utility model.
[0027] In the description of the scheme, it needs to be explained that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. And in the description of the scheme, the operator is taken as the reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.
[0028] As shown in Figures 1 to 5 The utility model discloses a rear -mounted rigid fixed structure, including fixed shell 1, threaded insert 2 and bolt 3, fixed shell 1 has the hollow inner chamber, the inner contour of inner chamber with the outer contour of threaded insert 2 is matched, threaded insert 2 is embedded in the inner chamber from the bottom of fixed shell 1, threaded insert 2 is axially arranged with a threaded hole 201, the top of fixed shell 1 is provided with the through -hole 101 that is linked with threaded hole 201, bolt 3 is screwed with threaded hole 201 to limit the fixed part 100 between the top of bolt 3 and the top surface of fixed shell 1.
[0029] The scheme uses the structure of the fixed shell 1 and the threaded insert 2 to embed, which cooperates with the bolt 3 to form a fixed structure that can fix the fixed part 100 on the component shell (here, the component shell refers to the shell of any component that needs to fix the fixed part 100, which is not shown in the figure, and the fixed part 100 refers to any element that needs to be fixed with the component shell, which is not unique and is not listed one by one). The fixed structure in the present scheme can be in the form of rear loading to cooperate with the component shell, so that the component shell itself does not need to be integrally injection molded with the corresponding fixed structure, which greatly reduces the difficulty and time of preparing the component shell, and also facilitates the preparation of the fixed structure itself and improves the connection efficiency between the component shell and the fixed structure.
[0030] On the other hand, the fixed shell 1 can be used to limit the position of the threaded insert 2 from the axial and radial directions respectively, to ensure the constant position of the threaded insert 2 itself, so that the component shell itself does not need to limit the position of the threaded insert 2, reducing the pressure on the component shell, and further preventing the component shell from interfering with the threaded insert 2, to ensure the integrity of the component shell as much as possible, while ensuring the stability of the fixed part 100, so that the component shell will not be broken due to the fixation between the fixed part 100, ensuring the integrity and safety of the whole.
[0031] The threaded insert 2 in the scheme is made of metal material, preferably made of carbon steel or stainless steel, so as to have higher rigidity and strength to ensure the stability and effectiveness of the connection between it and the bolt 3. The fixed shell 3 is made of plastic material by injection molding.
[0032] As shown in Figure 2 , Figure 3 , Figure 5 The threaded insert 2 includes an integrally formed barrel 202 and a base 203, the barrel 202 is coaxially fixed to the top of the base 203, the threaded hole 201 extends along the axis of the barrel 202 and the base 203, the barrel 202 is embedded in the through hole 101, and the base 203 is embedded in the inner cavity.
[0033] Specifically, the top of the barrel 202 has an outer edge 204 protruding outward from the outer peripheral wall thereof, and an annular clamping groove is formed between the outer edge 204 and the top surface of the base 203. An outer protruding first limiting step surface 103 is formed on the inner wall of the through hole 101, and a second limiting step surface 104 is formed at the connection between the through hole 101 and the inner cavity. The barrel 202 is inserted into the through hole 101 from the bottom of the through hole 101, the first limiting step surface 103 abuts against the top of the annular clamping groove (i.e. the bottom of the outer edge 204), and at the same time, the second limiting step surface 104 abuts against the bottom of the annular clamping groove (i.e. the top surface of the base 203), thereby axially limiting the threaded insert 2, avoiding the threaded insert 2 from sliding out of the top or bottom of the through hole 101.
[0034] Further, the inner diameter of the limiting ring 102 gradually decreases from bottom to top, so that the inner peripheral wall of the limiting ring 102 gradually shrinks inward from bottom to top, and the outer peripheral wall of the outer edge 204 matches the inner peripheral wall of the limiting ring 102. Such a structure can facilitate the quick insertion of the barrel 202 into the through hole 101, so that the first limiting step surface 103 quickly abuts against the top of the annular clamping groove.
[0035] The top of the outer edge 204 has a guide angle to facilitate the insertion of the barrel 202, and the top of the outer edge 204 is not protruding outward from the through hole 101, and the top of the through hole 101 is a flat surface to make the fixed part 100 fit with the fixed shell 1, thereby enhancing the stability of the fixed connection of the fixed part 100.
[0036] Preferably, the base 203 is square, and the inner cavity is square to match the base 203, so as to prevent the base 203 from rotating in the inner cavity, thereby avoiding displacement of the fixed part 100 caused by rotation.
[0037] Further, at least one axial extending limiting rib 105 is arranged on each side inner wall of the inner cavity, the limiting rib 105 is convex to the inner wall of the inner cavity, each limiting rib 105 abuts against the side wall of the base 203 to form radial limiting for the base 203. In the preferred embodiment, a plurality of limiting ribs 105 are arranged on each side inner wall of the inner cavity to respectively abut against the base 203, which enhances the radial limiting for the base 203, so that the threaded insert 2 keeps constant position without displacement in the front, back, left and right directions.
[0038] The bottom of the limiting rib 105 is provided with a guide inclined surface 106 inclined to the bottom opening of the fixed shell 1, which facilitates the sliding of the base 203 into the inner cavity.
[0039] The top of the bolt 3 has a larger diameter than the shank, and the shank of the bolt 3 is sleeved with a washer 301 abutting against the top, the washer 301 can be made of soft material such as rubber ring, which reduces the abrasion of the surface of the fixed part 100 and reduces the vibration in the vibration mode.
[0040] It should be understood that although the present specification is described in terms of embodiments, each embodiment does not contain only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments which can be understood by those skilled in the art.
[0041] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and they are not used to limit the protection scope of the present application, and any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.
Claims
1. A rear-mounted rigid fixing structure, characterized in that: The device includes a fixed shell (1), a threaded insert (2), and a bolt (3). The fixed shell (1) has a hollow inner cavity. The inner contour of the inner cavity matches the outer contour of the threaded insert (2). The threaded insert (2) is embedded in the inner cavity from the bottom of the fixed shell (1). A threaded hole (201) is axially provided in the threaded insert (2). A through hole (101) communicating with the threaded hole (201) is opened on the top of the fixed shell (1). The bolt (3) is screwed to the threaded hole (201) to limit the part to be fixed (100) between the top of the bolt (3) and the top surface of the fixed shell (1).
2. The rear-mounted rigid fixing structure according to claim 1, characterized in that: The threaded insert (2) includes an integrally formed cylindrical body (202) and a base (203). The cylindrical body (202) is coaxially fixed to the top of the base (203). The threaded hole (201) extends along the axis of the cylindrical body (202) and the base (203). The cylindrical body (202) is embedded in the through hole (101), and the base (203) is embedded in the inner cavity.
3. The rear-mounted rigid fixing structure according to claim 2, characterized in that: The top of the cylinder (202) has an outer edge (204) protruding from its outer peripheral wall. An annular groove is formed between the outer edge (204) and the top surface of the base (203). A first limiting step surface (103) protruding from the inner wall of the through hole (101) is formed. A second limiting step surface (104) is formed at the connection between the through hole (101) and the inner cavity. The cylinder (202) is inserted into the through hole (101) from the bottom. The first limiting step surface (103) abuts against the top of the annular groove, and the second limiting step surface (104) abuts against the bottom of the annular groove to form an axial limit on the threaded insert (2).
4. The rear-mounted rigid fixing structure according to claim 3, characterized in that: The inner diameter of the limiting ring (102) gradually decreases from bottom to top, so that the inner peripheral wall of the limiting ring (102) gradually contracts inward from bottom to top, and the outer peripheral wall of the outer edge (204) matches the inner peripheral wall of the limiting ring (102).
5. The rear-mounted rigid fixing structure according to claim 4, characterized in that: The top of the outer edge (204) has a chamfer, and the top of the outer edge (204) does not protrude outward from the through hole (101), and the top of the through hole (101) is a plane.
6. The rear-mounted rigid fixing structure according to claim 3, characterized in that: The base (203) is square, and the inner cavity is square to match the base (203).
7. The rear-mounted rigid fixing structure according to claim 6, characterized in that: At least one axially extending limiting rib (105) is provided on each side inner wall of the cavity. The limiting rib (105) protrudes outward from the inner wall of the cavity. Each limiting rib (105) abuts against the side wall of the base (203) to form a radial limit on the base (203).
8. The rear-mounted rigid fixing structure according to claim 7, characterized in that: The bottom of the limiting rib (105) has a guide slope (106) that is inclined toward the bottom opening of the fixed shell (1).
9. The rear-mounted rigid fixing structure according to claim 1, characterized in that: The top diameter of the bolt (3) is larger than its shank, and a washer (301) is fitted on the shank of the bolt (3) to abut against its top.
10. The rear-mounted rigid fixing structure according to any one of claims 1-9, characterized in that: The threaded insert (2) is made of metal.