Connector mounting structure and vehicle-mounted electronic equipment

Abstract

The invention provides a connector mounting structure and vehicle-mounted electronic equipment, and belongs to the technical field of vehicle parts. The connector installation structure comprises an installation panel and a connector fixed on the installation panel through a screw, a flange plate of the connector is provided with a screw penetrating hole, the installation panel is provided with a threaded hole, and a screw rod portion comprises a threaded section connected with the threaded hole in a matched mode and a large-diameter section with the outer diameter larger than that of the threaded section. A step face abutting against the installation panel is formed between the large-diameter section and the threaded section, the distance between the end face of the head of the screw and the step face is larger than or equal to the thickness of the flange plate, a sealing ring is arranged between the flange plate and the installation panel, and the elasticity of the sealing ring meets the requirement that the end face of the flange plate abuts against the end face of the head. According to the invention, a forced bushing is omitted, a new-form screw is adopted, and the size of the screw is reasonably designed, so that the purpose of ensuring that the flange plate is not pressed and deformed without arranging the forced bushing is achieved, and a series of technical problems caused by adopting the forced bushing in the prior art are solved.

Description

Technical Field

[0001] The invention relates to a connector installation structure and a vehicle-mounted electronic device, belonging to the technical field of vehicle components. Background Art

[0002] The shell material of the new energy vehicle connector is usually plastic. The shell includes a flange. The connector is fixedly mounted on the mounting panel through the flange. The mounting panel is provided with threaded holes. The flange is provided with screw holes for screws to pass through. The screws pass through the flange and are fixedly connected to the mounting panel to fix the connector. Since the shell material is plastic and the strength is insufficient, in order to ensure the supporting strength of the flange and prevent the head of the screw from locally deforming the flange, a strong bushing is often used.

[0003] like Figure 1 and Figure 2 As shown, the connector 1 includes a flange 11, and a plurality of mounting holes are provided on the flange 11. A strong bushing 2 is interference-fitted in each mounting hole. Figure 3 As shown, the height of the forced bushing 2 is greater than the height of the flange 11, one end face of the forced bushing 2 is flush with the end face of the flange 11 facing the installation panel 3, and the other end face of the forced bushing 2 protrudes from the end face of the flange 11 facing away from the installation panel 3, and the inner hole size of the forced bushing 2 is greater than the rod diameter of the screw 4. When installing the connector, the screw 4 passes through the inner hole of the forced bushing 2 and is connected with the threaded hole 31 on the installation panel 3. After the screw 4 is tightened, its head is pressed against the end face of the forced bushing 2 to avoid direct pressing on the end face of the flange 11 and causing local deformation of the flange 11. In addition, in order to ensure air tightness, a sealing ring (not shown in the figure) is usually set between the flange 11 and the installation panel 3.

[0004] However, the use of interference fit of the forced bushing 2 in the mounting hole of the flange 11 not only increases the cost of parts and assembly costs, but also during the installation process, the forced bushing 2 will have severe friction contact with the hole wall of the mounting hole, which can easily scrape off the material on the hole wall. Some materials will form burrs on the flange 11, resulting in unqualified appearance quality. Deburring operations are required in the subsequent process. Some materials will fall off directly to form debris 5 ( Figure 1 As shown in the figure), once these debris 5 adhere to the sealing ring, it will cause airtight failure. At the same time, since it is assembled from multiple parts, the size and tolerance of the installation hole provided by the forced installation bushing 2 are determined by the size and tolerance of the installation hole of the flange 11 and the size and tolerance of the forced installation bushing 2 itself, so the tolerance of the connector installation hole is difficult to control. In addition, Figure 3As shown, since the chamfer 32 is processed at the hole mouth of the threaded hole 31 on the mounting panel 3, and there is a lack of precise positioning between the mounting panel 3 and the connector 1, when the connector 1 has a large offset, part of the end face of the forced bushing 2 will correspond to the chamfer 32, that is, this part of the end face faces a void rather than a solid object, which reduces the support surface of the forced bushing 2 and may cause the risk of support failure. Summary of the invention

[0005] The object of the present invention is to provide a connector mounting structure to solve the problems that the existing connector adopts a forced bushing to ensure the supporting strength of the flange, which leads to increased parts cost and assembly cost, and the material on the flange hole wall is easily scraped off when the forced bushing is installed, resulting in unqualified appearance quality, the need for deburring in the subsequent process, and even the detached debris sticking to the sealing ring causing airtight failure, and the tolerance of the connector mounting hole is determined by the size and tolerance of the flange and the forced bushing, resulting in the difficulty in controlling the tolerance of the connector mounting hole; the object of the present invention is also to provide a vehicle-mounted electronic device to solve the above problems.

[0006] To achieve the above purpose, the connector installation structure in the present invention adopts the following technical solution: A connector mounting structure comprises a mounting panel and a connector fixed to the mounting panel by screws, the connector comprising a flange, a screw through-hole is arranged on the flange, a threaded hole is arranged on the mounting panel, the screw comprises a head and a rod, the rod comprises a threaded section matched with the threaded hole and a large diameter section located in the screw through-hole and having an outer diameter greater than the outer diameter of the threaded section, a step surface abutting against the mounting panel is formed between the large diameter section and the threaded section, a distance between an end face of the head facing the side of the rod and the step surface is greater than or equal to the thickness of the flange, a sealing ring is arranged between the flange and the mounting panel, the elasticity of the sealing ring satisfies the requirement of maintaining sealing between the flange and the mounting panel while making the end face of the flange abut against the end face of the head.

[0007] The beneficial effect of the above technical solution is that the present invention belongs to an invention of element change. Specifically, the present invention omits the forced bushing in the prior art, and instead uses a screw to directly pass through the flange of the connector and cooperate with the threaded connection of the mounting panel. At the same time, the present invention changes the shape of the screw. The rod of the screw includes a threaded section and a large diameter section. The threaded section is cooperated with the threaded hole on the mounting panel. The outer diameter of the large diameter section is larger than the outer diameter of the threaded section, thereby forming a step surface between the large diameter section and the threaded section. The step surface abuts against the mounting panel, which can limit the installation limit of the screw and facilitate the installation of the screw. At the same time, the distance between the end face of the screw head facing the rod side and the step face is greater than or equal to the thickness of the flange, and a sealing ring is arranged between the flange and the mounting panel. The elasticity of the sealing ring satisfies the requirement of maintaining the sealing between the flange and the mounting panel while making the end face of the flange and the end face of the head press tightly. In this way, the screw will not cause great pressure on the flange during installation. The pressure of the screw only comes from the elastic force of the sealing ring. Compared with directly pressing the flange with screws of equal diameter on the rod to fix the flange on the mounting panel, this greatly reduces the force on the flange and can avoid local deformation of the flange, thereby achieving the purpose of ensuring that the flange is not deformed by pressure without setting a forced bushing, thereby solving a series of technical problems caused by the use of forced bushings in the prior art.

[0008] Furthermore, a chamfer is provided at the opening of the threaded hole, and the outer diameter of the large diameter section is such that the step surface can completely cover the chamfer.

[0009] Furthermore, the large diameter section extends to the end surface of the head, and the axial length of the large diameter section is greater than the thickness of the flange.

[0010] Furthermore, the outer peripheral surface of the large diameter section is a smooth surface.

[0011] Furthermore, there is a clearance fit between the large diameter section and the screw through hole.

[0012] To achieve the above purpose, the vehicle-mounted electronic device in the present invention adopts the following technical solutions: A vehicle-mounted electronic device comprises a shell and a connector, wherein a side wall of the shell constitutes a mounting panel, the connector is fixed to the mounting panel by screws, the connector comprises a flange, a screw through hole is arranged on the flange, a threaded hole is arranged on the mounting panel, the screw comprises a head and a rod, the rod comprises a threaded section matched with the threaded hole and a large diameter section located in the screw through hole and having an outer diameter greater than the outer diameter of the threaded section, a step surface abutting against the mounting panel is formed between the large diameter section and the threaded section, a distance between an end face of the head facing the side of the rod and the step surface is greater than or equal to the thickness of the flange, a sealing ring is arranged between the flange and the mounting panel, the elasticity of the sealing ring satisfies the requirement of maintaining sealing between the flange and the mounting panel while making the end face of the flange abut against the end face of the head.

[0013] The beneficial effect of the above technical solution is that the present invention belongs to an invention of element change. Specifically, the present invention omits the forced bushing in the prior art, and instead uses a screw to directly pass through the flange of the connector and cooperate with the threaded connection of the mounting panel. At the same time, the present invention changes the shape of the screw. The rod of the screw includes a threaded section and a large diameter section. The threaded section is cooperated with the threaded hole on the mounting panel. The outer diameter of the large diameter section is larger than the outer diameter of the threaded section, thereby forming a step surface between the large diameter section and the threaded section. The step surface abuts against the mounting panel, which can limit the installation limit of the screw and facilitate the installation of the screw. At the same time, the distance between the end face of the screw head facing the rod side and the step face is greater than or equal to the thickness of the flange, and a sealing ring is arranged between the flange and the mounting panel. The elasticity of the sealing ring satisfies the requirement of maintaining the sealing between the flange and the mounting panel while making the end face of the flange and the end face of the head press tightly. In this way, the screw will not cause great pressure on the flange during installation. The pressure of the screw only comes from the elastic force of the sealing ring. Compared with directly pressing the flange with screws of equal diameter on the rod to fix the flange on the mounting panel, this greatly reduces the force on the flange and can avoid local deformation of the flange, thereby achieving the purpose of ensuring that the flange is not deformed by pressure without setting a forced bushing, thereby solving a series of technical problems caused by the use of forced bushings in the prior art.

[0014] Furthermore, a chamfer is provided at the opening of the threaded hole, and the outer diameter of the large diameter section is such that the step surface can completely cover the chamfer.

[0015] Furthermore, the large diameter section extends to the end surface of the head, and the axial length of the large diameter section is greater than the thickness of the flange.

[0016] Furthermore, the outer peripheral surface of the large diameter section is a smooth surface.

[0017] Furthermore, there is a clearance fit between the large diameter section and the screw through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereogram of a connector in the prior art; Figure 2 It is a cross-sectional view of the installation of the connector in the prior art; Figure 3 for Figure 2 A partial enlarged view of the Figure 4 It is a cross-sectional view of Embodiment 1 of the connector mounting structure of the present invention; Figure 5 for Figure 4 A partial enlarged view of the Figure 6 It is an exploded view of Embodiment 1 of the connector installation structure of the present invention; Figure 7A three-dimensional diagram of a screw in Embodiment 1 of the connector mounting structure of the present invention from one viewing angle; Figure 8 A three-dimensional diagram of the screw in the connector installation structure embodiment 1 of the present invention from another perspective; Fig. 9 It is a partial cross-sectional view of embodiment 2 of the connector mounting structure of the present invention.

[0019] In the figure: 1, connector; 11, flange; 111, screw hole; 2, forced bushing; 3, mounting panel; 31, threaded hole; 32, chamfer; 4, screw; 41, head; 411, clamping end face; 42, large diameter section; 421, step surface; 43, threaded section; 44, small diameter section; 5, debris; 6, sealing ring. DETAILED DESCRIPTION

[0020] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0021] In view of the technical problems in the prior art, the technical concept of the present invention is to omit the forced bushing in the prior art, so that the screw can directly pass through the flange of the connector and be connected with the thread of the installation panel, and at the same time change the shape of the screw so that the rod of the screw includes a large diameter section whose outer diameter is larger than the outer diameter of the thread section, and utilize the step surface formed between the large diameter section and the thread section to press against the installation panel, so as to limit the installation limit of the screw; at the same time, the size of the screw is set so that the distance between the end face of the screw head facing the rod side and the step surface is greater than or equal to the thickness of the flange, and utilize the elasticity of the sealing ring between the flange and the installation panel to press the end face of the flange against the end face of the head, so as to avoid the screw head directly fixing the connector to the installation panel by pressing the flange, thereby achieving the purpose of ensuring that the flange is not deformed by pressure without providing a forced bushing.

[0022] Embodiment 1 of the connector mounting structure of the present invention: like Figure 4 , Figure 5 and Figure 6 As shown, the connector mounting structure includes a mounting panel 3 and a connector 1 fixed to the mounting panel 3 by screws 4. The mounting panel 3 may be a separate panel, and a mounting structure for mounting on a vehicle is provided on the panel. Of course, the mounting panel 3 may also be a side wall of a housing of an on-board electronic device, and the on-board electronic device may be a DC / DC device package or a PDU distribution device, etc. The connector 1 includes a housing, which is made of plastic, and includes a flange 11. The flange 11 is provided with a plurality of screw through holes 111 for screws 4 to pass through. The mounting panel 3 is provided with threaded holes 31 that are matched with the screws 4, and the opening of the threaded holes 31 is provided with chamfers 32.

[0023] Specific combination Figure 7 and Figure 8 As shown, the screw 4 includes a head 41 and a rod. The head in this embodiment is a spherical center column head, and a cross groove is formed on the spherical center column head. The rod includes a threaded section 43 that is connected to the threaded hole 31 and a large diameter section 42 that is located in the screw through hole 111 and has an outer diameter greater than the outer diameter of the threaded section 43. A step surface 421 is formed between the large diameter section 42 and the threaded section 43. The step surface 421 abuts against the mounting panel 3, which can limit the installation limit of the screw 4 and facilitate the installation of the screw 4. The large diameter section 42 extends to the end face of the head 41 facing the rod side (i.e., the clamping end face 411). The axial length of the large diameter section 42 is greater than the thickness of the flange 3, that is, the distance between the clamping end face 411 and the step surface 421 is greater than the thickness of the flange 3. A sealing ring 6 is arranged between the flange 11 and the mounting panel 3. Specifically, a sealing ring mounting groove is arranged on the end face of the flange 11. In order to ensure the sealing between the flange 11 and the mounting panel 3 and to ensure that the head 41 can press the flange 11, it is necessary to control the length of the large diameter section 42 and configure a suitable sealing ring 6. The elasticity of the sealing ring 6 must meet the requirements of maintaining the sealing between the flange 11 and the mounting panel 3 while making the end face of the flange 11 and the end face of the head (i.e., the pressing end face 411) press against each other.

[0024] In this way, after the connector 1 is installed, under the action of the static friction between the sealing ring 6 and the installation panel 3, and under the action of the static friction between the head 41 of the screw and the flange 11, the connector 1 will not move radially, ensuring the stable installation of the connector 1. At the same time, the installation limit of the screw 4 is limited by the step surface 421 during installation, and the head 41 of the screw will not cause a lot of pressure on the flange 11. The pressure of the screw 4 only comes from the elastic force of the sealing ring 6. Compared with directly pressing the flange with screws of equal diameter on the stem to fix the flange on the installation panel, this greatly reduces the force on the flange 11 and can avoid local deformation of the flange 11, thereby achieving the purpose of ensuring that the flange 11 is not deformed by pressure without setting a forced bushing.

[0025] Furthermore, the outer peripheral surface of the large diameter section 42 is smooth, which is convenient for processing and manufacturing. Figure 5As shown, there is a clearance fit between the large diameter section 42 and the screw through hole 111, which is convenient for installation. In addition, the outer diameter of the large diameter section 42 satisfies that the step surface 421 can completely cover the chamfer 32. Since the large diameter section 42 and the threaded section 43 are coaxial, the threaded section 43 is assembled and connected with the threaded hole 31, and the two are also coaxial, which ensures that once the screw 4 is assembled, the large diameter section 42 will be coaxial with the threaded hole 31, and the large diameter section 42 will not be offset. Therefore, as long as the outer diameter of the large diameter section 42 is larger than the chamfer 32, even if the connector 1 and the mounting panel 3 are misaligned, that is, the screw through hole 111 is not coaxial with the threaded hole 31, and the screw through hole 111 is offset, it can still be ensured that a whole circle of the step surface 421 can contact the end face of the mounting panel 3, and there will be no situation where the partial support function is lost due to the partial correspondence with the chamfer 32, thereby avoiding the risk of support failure.

[0026] In summary, the present invention not only realizes the installation and fixation of the connector, but also realizes that the flange of the connector is not deformed by pressure by eliminating the forced bushing, adopting a new form of screw, and reasonably designing the size of the screw, while the structure of the connector does not need to be changed at all, generally speaking, it only needs to change a screw. The present invention omits the forced bushing, solves the problem of increased parts cost and assembly cost due to the use of forced bushing in the prior art, and at the same time omits the assembly process of the forced bushing, solves the problem that the forced bushing easily scrapes off the material on the flange hole wall during installation, resulting in unqualified appearance quality, the need for deburring in the subsequent sequence, and even the problem that the fallen debris adheres to the sealing ring and causes airtight failure, thereby avoiding the generation of burrs and debris from the source. At the same time, the tolerance of the connector installation hole is determined by the size and tolerance of the screw perforation on the flange, avoiding the problem of increased tolerance due to the introduction of the forced bushing.

[0027] Embodiment 2 of the connector mounting structure of the present invention: Fig. 9 As shown, different from Example 1, the shank of the screw can be composed of a three-section structure, namely a small diameter section 44, a large diameter section 42 and a threaded section 43, the small diameter section 44 is located between the head 41 and the large diameter section 42, the outer diameter of the small diameter section 44 is smaller than the outer diameter of the large diameter section 42, although at this time the axial length of the large diameter section 42 is smaller than the thickness of the flange 11, but the distance from the step surface 421 between the large diameter section 42 and the threaded section 43 to the head end face (i.e., the clamping end face 411) is greater than the thickness of the flange 11, so it can achieve the same effect.

[0028] In other embodiments of the connector mounting structure: the distance between the head end face and the step surface can be exactly equal to the thickness of the flange. At this time, when the screw is tightened, the step surface presses against the mounting panel, and the head end face also presses against the flange. Since the sealing ring is compressed, its elastic force can still ensure that the head end face of the screw presses against the end face of the flange. Due to the existence of the step surface, the pressing force will not cause damage to the flange.

[0029] In other embodiments of the connector mounting structure: the outer diameter of the large diameter section may be equal to the inner diameter of the screw hole, with no gap between the two. In this case, the size of the screw hole is just enough for the large diameter section to fit in.

[0030] In other embodiments of the connector mounting structure: the outer peripheral surface of the large diameter section may also be provided with external threads, and in this case the shank of the screw includes two threaded sections.

[0031] In other embodiments of the connector mounting structure: the head of the screw may also be a hexagonal head or a round head.

[0032] The embodiment of the vehicle-mounted electronic device in the present invention: the vehicle-mounted electronic device includes a housing and a connector, a side wall of the housing constitutes a mounting panel, and the structure and assembly method of the connector and the mounting panel are the same as the connector mounting structure in any of the above embodiments, which will not be repeated here. The vehicle-mounted electronic device can be a DC / DC device package or a PDU distribution device, etc., which will not be exhaustively listed here. As long as it is used in a vehicle, has a housing, and a side wall of the housing can constitute a mounting panel for installing a connector, and the device that can transmit electrical energy and / or signals belongs to the vehicle-mounted electronic device protected by the present invention.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A connector mounting structure, characterized in that: The invention comprises a mounting panel (3) and a connector (1) fixed to the mounting panel (3) by means of screws (4), wherein the connector (1) comprises a flange (11), the flange (11) is provided with a screw through hole (111), the mounting panel (3) is provided with a threaded hole (31), the screw (4) comprises a head (41) and a rod, the rod comprises a threaded section (43) matched with the threaded hole (31) and a large diameter section (42) located in the screw through hole (111) and having an outer diameter greater than the outer diameter of the threaded section (43), the large diameter section A step surface (421) is formed between the threaded section (42) and the threaded section (43) to abut against the mounting panel (3); a distance between the end surface of the head (41) facing the rod portion and the step surface (421) is greater than or equal to the thickness of the flange (11); a sealing ring (6) is provided between the flange (11) and the mounting panel (3); the elasticity of the sealing ring (6) satisfies the requirement of maintaining sealing between the flange (11) and the mounting panel (3) while allowing the end surface of the flange (11) to abut against the end surface of the head (41).

2. The connector mounting structure according to claim 1, characterized in that: A chamfer (32) is provided at the opening of the threaded hole (31), and the outer diameter of the large diameter section (42) is such that the step surface (421) can completely cover the chamfer (32).

3. The connector mounting structure according to claim 1 or 2, characterized in that: The large diameter section (42) extends to the end surface of the head (41), and the axial length of the large diameter section (42) is greater than the thickness of the flange (11).

4. The connector mounting structure according to claim 1 or 2, characterized in that: The outer peripheral surface of the large diameter section (42) is a smooth surface.

5. The connector mounting structure according to claim 1 or 2, characterized in that: There is a clearance fit between the large diameter section (42) and the screw through hole (111).

6. A vehicle-mounted electronic device, characterized in that: The invention comprises a housing and a connector (1), wherein a side wall of the housing forms a mounting panel (3), the connector (1) is fixed to the mounting panel (3) by means of screws (4), the connector (1) comprises a flange (11), a screw through hole (111) is provided on the flange (11), a threaded hole (31) is provided on the mounting panel (3), the screw (4) comprises a head (41) and a rod, the rod comprising a threaded section (43) which is matched and connected to the threaded hole (31) and a large diameter section (43) which is located in the screw through hole (111) and has an outer diameter greater than the outer diameter of the threaded section (43). The large diameter section (42) and the threaded section (43) form a stepped surface (421) that abuts against the mounting panel (3); the distance between the end surface of the head (41) facing the rod portion and the stepped surface (421) is greater than or equal to the thickness of the flange (11); a sealing ring (6) is provided between the flange (11) and the mounting panel (3); the elasticity of the sealing ring (6) satisfies the requirement of maintaining sealing between the flange (11) and the mounting panel (3) while allowing the end surface of the flange (11) to abut against the end surface of the head (41).

7. The vehicle-mounted electronic device according to claim 6, characterized in that: A chamfer (32) is provided at the opening of the threaded hole (31), and the outer diameter of the large diameter section (42) is such that the step surface (421) can completely cover the chamfer (32).

8. The vehicle-mounted electronic device according to claim 6 or 7, characterized in that: The large diameter section (42) extends to the end surface of the head (41), and the axial length of the large diameter section (42) is greater than the thickness of the flange (11).

9. The vehicle-mounted electronic device according to claim 6 or 7, characterized in that: The outer peripheral surface of the large diameter section (42) is a smooth surface.

10. The vehicle-mounted electronic device according to claim 6 or 7, characterized in that: There is a clearance fit between the large diameter section (42) and the screw through hole (111).

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