mounting bushing

Abstract

The utility model relates to connecting piece technical field discloses a kind of installation bushings, installation bushings include: metal pipe, its one end is provided with the first step of outer convex, the other end is provided with the second step of outer convex;Rubber tube, it is set in the outside of metal pipe, the two ends of rubber tube respectively with the end face of first step and second step mutually close and abut, and the inner circumferential wall of rubber tube and the outer circumferential wall of metal pipe interference fit;The outer circumferential wall of rubber tube local area is concave and forms annular groove, annular groove is around the axis of rubber tube Setting, and being suitable for with second structural member clamping joint cooperation.The installation bushing provided by the utility model is set to installation bushing, so that bolt rod is not directly contacted with the communication hole of second structural member, and flexible buffering is realized by rubber tube set in the outside of metal pipe, so as to reduce the noise generated due to oil tank shaking, and the communication hole and bolt rod can be protected, which is beneficial to prolong the service life of bolt and communication hole.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, specifically to an mounting bushing. Background Technology

[0002] To securely attach the fuel tank to the vehicle's body structure, fuel tank straps are typically connected to mounting holes on the vehicle body via connecting holes at both ends and bolt assemblies. For example, prior art patent application CN202122324732.4 discloses a fuel tank strap assembly and a fuel tank, including straps, a reinforcing plate, and a connector. The reinforcing plate is fixedly connected to the fuel tank; the straps are used to bind the fuel tank; the connectors are used to connect the straps and the reinforcing plate to the vehicle body; the connectors include connecting bolts and connecting nuts; the straps have a first connecting hole, the reinforcing plate has a second connecting hole, and the connecting bolt passes through the first connecting hole, the second connecting hole, and a third connecting hole on the vehicle body before connecting to the connecting nut. However, because the fuel tank inevitably sways relative to the vehicle body during braking or acceleration / deceleration, and the bolt shank directly contacts the second connecting hole, noise is generated under impact and friction. Furthermore, over long-term use, the bolt shank itself wears down, leading to reduced connection reliability. Utility Model Content

[0003] In view of this, the present invention provides an installation bushing to solve the problem that the bolt rod directly contacts the second through hole, thereby generating noise under the action of collision and friction, and that the bolt rod body will wear down under long-term use, resulting in a decrease in connection reliability.

[0004] This utility model provides a mounting bushing for installation at the connecting hole of a second structural member, and for abutting against the first and third structural members disposed on both sides of the second structural member. The mounting bushing includes:

[0005] A metal tube, with a first protruding step at one end and a second protruding step at the other end;

[0006] A rubber tube is fitted over the outside of a metal tube. The two ends of the rubber tube abut against the end faces of the first step and the second step, which are close to each other. The inner circumferential wall of the rubber tube is interference-fitted with the outer circumferential wall of the metal tube.

[0007] A localized area of ​​the outer peripheral wall of the rubber tube is recessed to form an annular groove. The annular groove is arranged around the axis of the rubber tube and is suitable for snap-fitting with the second structural component.

[0008] In one alternative embodiment, a second groove is formed by a partial recess on the end face of the rubber tube near the second step. The second groove is used to accommodate the second step, and the end face of the second step and the end face of the rubber tube are spaced apart.

[0009] In one alternative implementation, the spacing is 1 mm to 5 mm.

[0010] In one alternative embodiment, a first groove is provided at the end of the rubber tube near the first step, and the first groove and the second groove are symmetrically arranged.

[0011] In one alternative embodiment, the junction between the first groove and the inner circumferential surface of the rubber tube is constructed as a second rounded corner surface.

[0012] The junction between the second groove and the inner circumference of the rubber tube is also constructed as a second rounded corner surface.

[0013] In one alternative embodiment, the metal tube includes a first sub-tube and a second sub-tube joined together. The first sub-tube includes a first step and a first tube body portion, and the second sub-tube includes a second step and a second tube body portion.

[0014] In one alternative embodiment, the metal tube is a single integral piece, the second step is annular, and the inner diameter of the annular groove is D, the outer diameter of the second step is d, wherein Dd ≥ 4.5 mm.

[0015] In one alternative embodiment, the edge of the outer peripheral surface of the second step away from the first step is provided with a first rounded corner surface.

[0016] In one alternative embodiment, the first step is annular, and the absolute value of the difference between the outer diameter of the first step and the outer diameter of the rubber tube is less than or equal to 1 mm.

[0017] The technical solution of this utility model has the following advantages:

[0018] 1. The mounting bushing provided by this utility model, by setting the mounting bushing, prevents the bolt rod from directly contacting the connecting hole of the second structural component, and achieves flexible buffering through the rubber tube sleeved outside the metal tube, thereby reducing the noise caused by the shaking of the oil tank, protecting the connecting hole and the bolt rod, and helping to extend the service life of the bolt and the connecting hole.

[0019] 2. The mounting bushing provided by this utility model provides deformation space for the rubber tube when it is squeezed along its axial direction by placing the end face of the second step inside the second groove. Thus, after the mounting bushing is installed, the rubber tube is pre-compressed, thereby giving the rubber tube a better axial vibration isolation effect.

[0020] 3. The mounting bushing provided by this utility model, by setting a first groove symmetrical to the second groove, enables the rubber tube to be installed in both directions during the installation process, thereby avoiding the risk of reverse installation and having a certain foolproof function.

[0021] 4. The mounting bushing provided by this utility model guides the metal tube into the rubber tube by setting a second rounded corner surface, so as to make the insertion of the metal tube into the rubber tube smoother and improve the installation efficiency.

[0022] 5. The mounting bushing provided by this utility model ensures that the second step can pass through the connecting hole of the second structural member by making the outer diameter of the second step smaller than the inner diameter of the annular groove.

[0023] 6. The mounting bushing provided by this utility model has a first rounded corner surface on the outer peripheral edge of the second step, which makes it smoother when the second step is pressed into the rubber tube, and at the same time avoids the sharp edge of the second step from scratching the inner wall of the rubber tube during assembly, thus protecting the rubber tube.

[0024] 7. The mounting bushing provided by this utility model makes the outer diameter of the first step match the outer diameter of the rubber tube, so that the appearance of one end of the mounting bushing is flatter and the contact between the first step and the rubber tube is more sufficient, which helps to improve the contact effect and aesthetics. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an installation bushing according to an embodiment of the present utility model;

[0027] Figure 2 for Figure 1 A schematic cross-sectional view of the mounting bushing is shown.

[0028] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the disassembled mounting bushing.

[0029] Figure 4 for Figure 1 The diagram shows the disassembled state of the mounting bushing. Figure 1 ;

[0030] Figure 5 for Figure 1 The diagram shows the disassembled state of the mounting bushing. Figure 2 ;

[0031] Figure 6 for Figure 1 The side view of the mounting bushing is shown.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Metal tube; 11. First step; 12. Second step; 121. First rounded corner surface; 2. Rubber tube; 21. First groove; 22. Second groove; 23. Annular groove; 3. Second rounded corner surface. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] The following is combined Figures 1 to 6 The following describes embodiments of the present invention.

[0036] According to an embodiment of the present invention, a mounting bushing is provided for installation at the communicating hole of a second structural member, and for abutting against the first and third structural members disposed on both sides of the second structural member. The mounting bushing includes:

[0037] The metal tube 1 has a first protruding step 11 at one end and a second protruding step 12 at the other end.

[0038] Rubber tube 2 is sleeved on the outside of metal tube 1. The two ends of rubber tube 2 abut against the end faces of the first step 11 and the second step 12 that are close to each other, and the inner peripheral wall of rubber tube 2 is interference-fitted with the outer peripheral wall of metal tube 1.

[0039] A local area of ​​the outer peripheral wall of the rubber tube 2 is recessed to form an annular groove 23. The annular groove 23 is arranged around the axis of the rubber tube 2 and is suitable for engaging with the second structural component.

[0040] The mounting bushing provided in this embodiment prevents the bolt rod from directly contacting the connecting hole of the second structural component. The rubber tube 2 sleeved outside the metal tube 1 provides flexible buffering, thereby reducing noise caused by the shaking of the oil tank and protecting the connecting hole and bolt rod, which helps to extend the service life of the bolt and connecting hole.

[0041] Specifically, taking an application in the automotive field as an example, the first structural component (e.g., the end of a strap) has a through hole, the second structural component (e.g., a fuel tank or a structure fixedly connected to the fuel tank) has a connecting hole corresponding to the through hole, and the third structural component (e.g., a vehicle body structure) has a mounting hole corresponding to the connecting hole. A mounting bushing is installed at the connecting hole and located between the first and third structural components. In the assembled state, the first step 11 and the second step 12 abut against the third structural component and the first structural component, respectively. The mounting hole can be a threaded hole, with the connecting bolt passing through the through hole and the mounting bushing in sequence and engaging with the threaded hole; the mounting hole can also be a through hole, with the connecting bolt passing through the through hole, the mounting bushing, and the mounting hole in sequence before connecting with the connecting nut.

[0042] The metal tube 1 has a first step 11 and a second step 12 that are integrally formed or separately connected at both ends along its axial direction and protrude radially outward. The first step 11 and the second step 12 are used to increase the contact area between the metal tube 1 and the first and third structural components, thereby reducing the pressure. When the fuel tank is fixed to the vehicle body by the straps, the interaction force between the metal tube 1 and the end of the straps and the vehicle body structure is about 55N. Without the first step 11 and the second step 12, the tube body of the metal tube 1 directly abuts against the end of the straps or the vehicle body structure. The force-bearing area is small and the pressure is large, which can easily cause the metal surface of the straps or the vehicle body structure to be crushed. In addition, the vehicle body is constantly vibrating during driving, and after long-term use, indentations will be produced on the end of the straps or the vehicle body structure, which may even lead to cracking in severe cases.

[0043] The two ends of the rubber tube 2 abut against the sides of the first step 11 and the second step 12, respectively, which restricts the axial movement of the rubber tube 2. The inner wall of the rubber tube 2 is also interference-fitted with the outer wall of the metal tube 1, which helps to further prevent the relative sliding between the rubber tube 2 and the metal tube 1, thereby improving the connection stability between the rubber tube 2 and the metal tube 1.

[0044] The annular groove 23 engages with the connecting hole of the second structural member, wherein, in the assembled state, all inner walls of the annular groove 23 abut against the second structural member. The rubber tube 2 is used to isolate vibration between the second structural member and the connecting bolts.

[0045] In one embodiment, combined Figure 2 and Figure 3 As shown, a second groove 22 is formed by a local depression on the end face of the rubber tube 2 near the second step 12. The second step 12 is located inside the second groove 22, and there is a gap between the end face of the second step 12 and the end face of the rubber tube 2.

[0046] The mounting bushing provided in this embodiment provides deformation space for the rubber tube 2 when it is compressed along its axial direction by placing the end face of the second step 12 inside the second groove 22. This allows the rubber tube 2 to be pre-compressed after the mounting bushing is installed, thereby giving the rubber tube 2 a better axial vibration isolation effect.

[0047] Specifically, the rubber tube 2 has a second groove 22 with a shape adapted to the end face of the second step 12 near the end face of the second step 12. The second step 12 falls into the second groove 22 along the axial direction of the bushing, and after the rubber tube 2 and the metal tube 1 are assembled, the entire area of ​​the second step 12 is located within the second groove 22. The end face of the rubber tube 2 is parallel to the end face of the second step 12.

[0048] In one embodiment, the spacing is 1 mm to 5 mm.

[0049] Specifically, the aforementioned interval refers to the distance between the end face of the rubber tube 2 near the second step 12 and the end face of the second step 12 away from the first step 11. For example, in some embodiments, the value of the aforementioned interval can be 1mm, 2mm, 3mm, 4mm, or 5mm, or it can be a range formed by any two of the above values.

[0050] In one embodiment, combined Figure 3 As shown, a first groove 21 is provided at one end of the rubber tube 2 near the first step 11, and the first groove 21 and the second groove 22 are symmetrically arranged.

[0051] The mounting bushing provided in this embodiment, by setting a first groove 21 symmetrical to the second groove 22, enables the rubber tube 2 to be installed in both directions during the installation process, thereby avoiding the risk of reverse installation and having a certain foolproof function.

[0052] Specifically, by making the first groove 21 and the second groove 22 axially symmetrically distributed on the rubber tube 2, the rubber tube 2 does not have a specific installation direction, which has a foolproof function, and the operator does not need to distinguish the direction during assembly.

[0053] In one embodiment, combined Figure 3 As shown, the junction between the first groove 21 and the inner circumferential surface of the rubber tube 2 is constructed as a second rounded corner surface 3;

[0054] The junction between the second groove 22 and the inner circumferential surface of the rubber tube 2 is also constructed as a second rounded corner surface 3.

[0055] The mounting bushing provided in this embodiment guides the metal tube 1 into the rubber tube 2 by setting the second rounded corner surface 3, so that the metal tube 1 can be inserted into the rubber tube 2 more smoothly, which helps to improve the installation efficiency.

[0056] Specifically, the second rounded corner surface 3 serves as an inlet surface, which guides the end of the metal tube 1 into the rubber tube 2 during the process of inserting the metal tube 1 into the rubber tube 2. This helps to reduce assembly difficulty and minimize damage to the rubber tube 2 that may result from forced insertion.

[0057] In one embodiment, the metal tube 1 includes a first sub-tube and a second sub-tube assembled together. The first sub-tube includes a first step 11 and a first tube body portion, and the second sub-tube includes a second step 12 and a second tube body portion.

[0058] Specifically, the first tube section and the second tube section together constitute the tube section of the metal tube 1. Since the outer diameters of the first tube section and the second tube section are smaller than the outer diameters of the first step 11 and the second step 12, during assembly, the first tube section and the second tube section can simply be inserted into the rubber tube 2 without needing to pass the first step 11 or the second step 12 through the rubber tube 2, thus facilitating assembly. Furthermore, a rubber pad is provided between the first tube section and the second tube section, thereby further improving the axial vibration damping effect of the mounting bushing.

[0059] Furthermore, the end edges of the first tube portion and the second tube portion are provided with a third rounded corner surface, which serves as an inlet surface to guide the ends of the first tube portion and the second tube portion into the rubber tube 2 during the insertion process.

[0060] In one embodiment, combined Figure 3 As shown, the metal tube 1 is an integral piece, the second step 12 is annular, and the inner diameter of the annular groove 23 is D, and the outer diameter of the second step 12 is d, where Dd ≥ 4.5 mm.

[0061] The mounting bushing provided in this embodiment ensures that the second step 12 can pass through the connecting hole of the second structural member by making the outer diameter of the second step 12 smaller than the inner diameter of the annular groove 23.

[0062] Specifically, since the inner diameter of the annular groove 23 is adapted to the diameter of the connecting hole of the second structural member, the outer diameter of the second step 12 is made smaller than the inner diameter of the annular groove 23 to avoid interference between the second step 12 and the connecting hole.

[0063] In one embodiment, combined Figure 4 As shown, the outer edge of the second step 12 away from the first step 11 is provided with a first rounded corner surface 121.

[0064] The mounting bushing provided in this embodiment has a first rounded corner surface 121 on the outer peripheral edge of the second step 12, which makes it smoother when the second step 12 is pressed into the rubber tube 2, and at the same time avoids the sharp edge of the second step 12 from scratching the inner wall of the rubber tube 2 during the assembly process, which helps to protect the rubber tube 2.

[0065] Specifically, the first rounded corner surface 121 serves as a guide surface, which guides the second step 12 when it is pressed into the rubber tube 2, and prevents the second step 12 from scratching the rubber tube 2.

[0066] In one embodiment, as shown in the figure, the first step 11 is annular, and the absolute value of the difference between the outer diameter of the first step 11 and the outer diameter of the rubber tube 2 is less than or equal to 1 mm.

[0067] The mounting bushing provided in this embodiment adapts the outer diameter of the first step 11 to the outer diameter of the rubber tube 2, making the appearance of one end of the mounting bushing smoother and the contact between the first step 11 and the rubber tube 2 more sufficient, which helps to improve the contact effect and aesthetics.

[0068] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A mounting bushing, characterized in that, The mounting bushing is used for installation at the connecting hole of the second structural member and abuts against the first and third structural members disposed on both sides of the second structural member. The mounting bushing includes: A metal tube (1) has a first protruding step (11) at one end and a second protruding step (12) at the other end. A rubber tube (2) is sleeved on the outside of the metal tube (1). The two ends of the rubber tube (2) abut against the end faces of the first step (11) and the second step (12) respectively, and the inner peripheral wall of the rubber tube (2) is interference-fitted with the outer peripheral wall of the metal tube (1). The outer peripheral wall of the rubber tube (2) is recessed in a local area to form an annular groove (23). The annular groove (23) is arranged around the axis of the rubber tube (2) and is adapted to be snapped into the second structural component.

2. The mounting bushing according to claim 1, characterized in that, The rubber tube (2) has a local area of ​​recessed end face near the second step (12) to form a second groove (22), the second groove (22) is used to accommodate the second step (12), and the end face of the second step (12) and the end face of the rubber tube (2) have a gap.

3. The mounting bushing according to claim 2, characterized in that, The interval is 1mm to 5mm.

4. The mounting bushing according to claim 2, characterized in that, The rubber tube (2) has a first groove (21) at one end near the first step (11), and the first groove (21) and the second groove (22) are symmetrically arranged.

5. The mounting bushing according to claim 4, characterized in that, The junction between the first groove (21) and the inner circumferential surface of the rubber tube (2) is constructed as a second rounded corner surface (3). The junction between the second groove (22) and the inner circumferential surface of the rubber tube (2) is also constructed as the second rounded corner surface (3).

6. The mounting bushing according to claim 1, characterized in that, The metal tube (1) includes a first sub-tube and a second sub-tube assembled together. The first sub-tube includes a first step (11) and a first tube body. The second sub-tube includes a second step (12) and a second tube body.

7. The mounting bushing according to claim 1, characterized in that, The metal tube (1) is an integral piece, the second step (12) is annular, and the inner diameter of the annular groove (23) is D, and the outer diameter of the second step (12) is d, wherein Dd ≥ 4.5 mm.

8. The mounting bushing according to claim 7, characterized in that, The outer edge of the second step (12) away from the first step (11) is provided with a first rounded corner surface (121).

9. The mounting bushing according to claim 1, characterized in that, The first step (11) is annular, and the absolute value of the difference between the outer diameter of the first step (11) and the outer diameter of the rubber tube (2) is less than or equal to 1 mm.

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