Sealing rubber sleeve and sealing structure

Abstract

The utility model discloses a sealing rubber sleeve and a sealing structure, in the sealing rubber sleeve, a main sealing strip and an abutting part are respectively arranged on one side wall of a sealing clamping groove, a limiting groove is arranged on the other side wall close to the bottom, and an auxiliary sealing strip is arranged at the bottom. The flange at the through hole of the dash panel is located in the sealing clamping groove, the free end of the flange abuts against the interior of the limiting groove, the main sealing strip, the auxiliary sealing strip and the abutting part abut against the flange in a sealed mode, and the control cable penetrates through the receding hole and the extending part and is in sealed fit with the receding hole and the extending part; the sealing structure comprises structural changes of the sealing rubber sleeve and the through hole of the dash panel, existing plane sealing is adjusted into integral wrapping type sealing, the abutting portion, the main sealing strip, the auxiliary sealing strip and the limiting groove are additionally arranged in the sealing clamping groove, more effective multiple sealing can be formed with the dash panel, clamping connection is reliable, and the sealing structure is simple in structure and convenient to use. The pressure caused by head-on wind and water can be borne, and the falling condition cannot occur.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing components in vehicles, and particularly relates to a sealing rubber sleeve and a sealing structure. Background Art

[0002] Since new energy vehicles do not have an internal combustion engine as a power device for generating heat, the HVAC air conditioning box of new energy vehicles is mostly provided with electric heaters such as heating wires, heating tubes or PTCs in the hot air channel to provide heat sources for functions such as defrosting and warm air of the vehicle. The HVAC air conditioning box is generally installed under the instrument panel. For some vehicle models, in order to reduce the pipeline length and improve efficiency, the HVAC air conditioning box is selected to be arranged in the engine compartment and close to the compressor; the control cable of the heater located in the engine compartment needs to pass through a through hole reserved on the front bulkhead and be connected to the control element on the instrument panel of the cab. To prevent air leakage and water leakage from the engine compartment to the cab through the through hole, the applicant designed a sealing rubber sleeve as shown in Figure 1 , Figure 2 and Figure 3 . The sealing rubber sleeve includes a plate-shaped sealing main body 1 in an oval shape. A relief hole 2 is penetrated through the middle of the sealing main body for the control cable to pass through and be in sealing fit. The two end faces of the sealing main body in the axial direction of the relief hole are respectively a convex surface 3 and a concave surface 4. A sealing groove 5 with a width slightly smaller than the thickness of the front bulkhead is formed in a circle on the side surface of the sealing main body, so that the sealing main body can be clamped and fixed at the through hole and be in sealing fit. The convex surface of the sealing main body faces forward, so as to deform and expand when bearing the oncoming pressure, making its connection with the front bulkhead more reliable. However, it is found after trial that since the sealing groove is a rectangular groove and the side wall for cooperating with the front bulkhead is a plane, it is not only easy to be lifted by defects such as pockmarks and burrs on the front bulkhead, resulting in a gap in the cooperation and poor sealing effect, but also easy to slip and loosen. When water splashes onto the convex surface, it is also easy to enter between the control cable and the relief hole. Therefore, further optimization of the design is needed. Summary of the Invention

[0003] Aiming at the above deficiencies of the prior art, the purpose of the utility model is to provide a sealing rubber sleeve and a sealing structure, solve the technical problem of poor sealing effect of the existing sealing rubber sleeve, and achieve the effects of improving the sealing performance and avoiding air leakage and water leakage.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A sealing rubber sleeve includes a sealing main body. A relief hole is penetrated through the middle of the sealing main body. A sealing groove surrounding the relief hole is formed on the sealing main body. The depth direction of the sealing groove corresponds to the radial direction of the relief hole. A main sealing strip surrounding the relief hole is formed by protruding on at least one side wall of the sealing groove.

[0006] Further, a secondary sealing strip surrounding the relief hole is formed by protruding at the bottom of the sealing groove.

[0007] Further, a main sealing strip is formed by protruding on only one side wall of the sealing card slot, and a limiting slot surrounding the relief hole is provided at the junction of the other side wall of the sealing card slot and the bottom.

[0008] Further, in the sealing card slot, the side wall where the main sealing strip is located is smoothly connected to the bottom through an arc surface.

[0009] Further, the main sealing strip and the auxiliary sealing strip are arranged close to the arc surface, and the free ends of the main sealing strip and the auxiliary sealing strip are both arc-shaped.

[0010] Further, a butting portion is formed by protruding on the side wall where the main sealing strip is located, and the butting portion is located on the side of the main sealing strip away from the relief hole.

[0011] Further, in the sealing card slot, the side wall where the butting portion is located is connected to the side of the butting portion close to the relief hole through an inclined surface.

[0012] Further, in the axial direction of the relief hole, one end face of the sealing body is recessed inward to form a concave surface, and the other end face correspondingly forms a convex surface. The concave surface has a taper and the radial dimension of the outer end is larger than that of the inner end. The side wall where the limiting slot is located is close to the convex surface.

[0013] Further, a cooperating extension portion in the shape of a cylinder and coaxial with the relief hole is formed by protruding on the convex surface.

[0014] The utility model further includes a sealing structure, which includes a front bulkhead and the sealing rubber sleeve as described above. The two sides of the front bulkhead are respectively an engine compartment and a driver's cab. A through hole is provided on the front bulkhead, and the front bulkhead has a flanging that bends towards the driver's cab at the through hole; the sealing rubber sleeve is arranged in the through hole with the concave surface facing the engine compartment, the flanging is located in the sealing card slot, the free end of the flanging abuts in the limiting slot, the dimension of the flanging in the axial direction of the relief hole is adapted to the width of the sealing card slot, so that the main sealing strip, the auxiliary sealing strip and the butting portion are respectively in sealing abutment with the flanging, and the control cable passes through the relief hole and the extension portion and is in sealing cooperation.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. For the sealing rubber sleeve of the utility model, a main sealing strip is formed by protruding on the side wall of the sealing card slot. When the sealing rubber sleeve is clamped into the through hole on the front bulkhead through the sealing card slot, the main sealing strip is compressed and deformed to tightly abut against the front bulkhead to form an effective seal. The free end of the main sealing strip forms a relatively small abutting surface with respect to the entire side wall, which not only helps to avoid defects on the front bulkhead, but also even if the defective part on the front bulkhead abuts against the free end of the main sealing strip, the main sealing strip will further deform under the action of pressure to surround the defect, thereby forming an effective seal.

[0017] 2. For the sealing rubber sleeve of the present utility model, a limiting groove is provided at the junction of the side wall and the bottom of the sealing card slot. When the sealing rubber sleeve is clamped into the through hole on the front apron through the sealing card slot, the free end of the flanging tightly abuts against the limiting groove. Not only do the limiting groove, the secondary sealing strip, and the primary sealing strip cooperate with the front apron to form triple sealing respectively, but also the axial movement of the sealing rubber sleeve can be restricted, making the clamping and installation of the sealing rubber sleeve on the front apron more stable and reliable.

[0018] 3. The sealing structure formed by installing the sealing rubber sleeve of the present utility model on the front apron includes the sealing rubber sleeve itself and the structural change at the through hole of the front apron, which is adjusted from the existing planar sealing to an overall wrapping type sealing. Moreover, an abutting part, a primary sealing strip, a secondary sealing strip, and a limiting groove are added in the sealing card slot. It can not only form more effective multiple sealing with the front apron, but also has reliable clamping, can withstand the pressure brought by the oncoming wind and water, and will not fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional view A of the sealing rubber sleeve described in the background art;

[0020] Figure 2 It is a three-dimensional view B of the sealing rubber sleeve described in the background art;

[0021] Figure 3 It is an axial sectional view of the sealing rubber sleeve described in the background art;

[0022] Figure 4 It is a three-dimensional view A of the sealing rubber sleeve described in the embodiment;

[0023] Figure 5 It is a three-dimensional view B of the sealing rubber sleeve described in the embodiment;

[0024] Figure 6 It is an axial sectional view of the sealing rubber sleeve described in the embodiment;

[0025] Figure 7 For Figure 6 The three-dimensional schematic view at position C in;

[0026] Figure 8 It is the overall schematic view of the sealing structure described in the embodiment;

[0027] Figure 9 It is the partial axial sectional view of the sealing structure described in the embodiment;

[0028] Among them, the sealing main body 1, the relief hole 2, the convex surface 3, the concave surface 4, the sealing card slot 5, the primary sealing strip 6, the secondary sealing strip 7, the limiting groove 8, the front apron 9, the flanging 10, the abutting part 11, the cockpit 12, the cooperating extension part 13, and the control cable 14. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0030] Embodiment:

[0031] Please refer to Figure 6 and Figure 7 , a sealing rubber sleeve, comprising a sealing body 1. A through hole 2 is provided through the middle of the sealing body 1. A sealing groove 5 surrounding the through hole 2 is formed on the sealing body 1. The depth direction of the sealing groove 5 corresponds to the radial direction of the through hole 2. A main sealing strip 6 surrounding the through hole 2 is formed by protrusion on at least one side wall of the sealing groove 5.

[0032] For the sealing rubber sleeve of the present utility model, the main sealing strip 6 is formed by protrusion on the side wall of the sealing groove 5. When the sealing rubber sleeve is clamped into the through hole on the front apron 9 through the sealing groove 5, the main sealing strip 6 is compressed and deformed to closely abut against the front apron 9 to form an effective seal. The free end of the main sealing strip 6 forms a relatively small abutting surface with respect to the entire side wall. This not only helps to avoid defects on the front apron 9, but also even if the defective part on the front apron 9 abuts against the free end of the main sealing strip 6, the main sealing strip 6 will further deform under the action of pressure to surround the defect, thereby forming an effective seal. The present utility model can effectively solve the problem of poor sealing effect of the existing sealing rubber sleeve and achieve the effects of improving the sealing performance and avoiding air leakage and water leakage.

[0033] Please refer to Figure 6 and Figure 7 , a secondary sealing strip 7 surrounding the through hole 2 is formed by protrusion at the bottom of the sealing groove 5. In this way, when the sealing rubber sleeve is clamped into the through hole on the front apron 9 through the sealing groove 5, the hole wall of the through hole on the front apron 9 abuts against the secondary sealing strip 7 to form an effective seal. The secondary sealing strip 7 and the main sealing strip 6 respectively cooperate with the front apron 9 to form a double seal, which is beneficial to improving the sealing performance of the sealing rubber sleeve and the front apron 9 in cooperation.

[0034] Please refer to Figure 6 and Figure 7 , the main sealing strip 6 is formed by protrusion on only one side wall of the sealing groove 5, and a limiting groove 8 surrounding the through hole 2 is provided at the connection between the other side wall of the sealing groove 5 and the bottom. In this way, as Figure 9As shown in the figure, a flange 10 is designed at the through hole of the front bulkhead 9, and the dimension of the flange 10 in the axial direction of the relief hole 2 is adapted to the width of the sealing groove 5. When the sealing rubber sleeve is snapped into the through hole on the front bulkhead 9 through the sealing groove 5, the free end of the flange 10 tightly abuts against the inside of the limiting groove 8. Not only do the limiting groove 8, the secondary sealing strip 7 and the primary sealing strip 6 cooperate with the front bulkhead 9 to form triple seals respectively, but also the axial movement of the sealing rubber sleeve can be restricted, making the snap-in installation of the sealing rubber sleeve on the front bulkhead 9 more stable and reliable.

[0035] Please refer to Figure 6 and Figure 7 , in the sealing groove 5, the side wall where the primary sealing strip 6 is located and the bottom are smoothly connected through an arc surface; in this way, the adaptability between the side wall and the bottom of the sealing groove 5 connected through the arc surface transition and the flange 10 is better.

[0036] Please refer to Figure 6 and Figure 7 , the primary sealing strip 6 and the secondary sealing strip 7 are arranged close to the arc surface, and the free ends of the primary sealing strip 6 and the secondary sealing strip 7 are both arc-shaped; in this way, in the radial direction of the relief hole 2, the dimensions of the free ends of the primary sealing strip 6 and the secondary sealing strip 7 are smaller, which is more conducive to being compressed and deformed to reduce the influence of defects on the front bulkhead 9 on the sealing performance.

[0037] Please refer to Figure 6 and Figure 7 , a butting portion 11 is formed by a protrusion on the side wall where the primary sealing strip 6 is located, and the butting portion 11 is located on the side of the primary sealing strip 6 away from the relief hole 2; in this way, when the sealing rubber sleeve is snapped into the through hole on the front bulkhead 9 through the sealing groove 5, the butting portion 11 is also compressed and deformed to tightly abut against the front bulkhead 9. The butting portion 11, the limiting groove 8, the secondary sealing strip 7 and the primary sealing strip 6 cooperate with the front bulkhead 9 to form quadruple seals respectively, which is beneficial to improving the sealing performance of the cooperation between the sealing rubber sleeve and the front bulkhead 9.

[0038] Please refer to Figure 6 and Figure 7 , in the sealing groove 5, the side wall where the butting portion 11 is located and the side of the butting portion 11 close to the relief hole 2 are connected through an inclined surface transition; in this way, when the sealing rubber sleeve is snapped into the through hole on the front bulkhead 9 through the sealing groove 5, the inclined surface causes the butting portion 11 to deform and deflect outward ( Figure 9 the deformed state is not shown in the figure), and the outer surface of the butting portion 11 forms an inclined water guide surface to guide the water falling on the side of the sealing rubber sleeve to flow outward in the radial direction of the relief hole 2, reducing the possibility of water flowing into the sealing groove 5.

[0039] Please refer to Figure 4 and Figure 5In the axial direction of the clearance hole 2, one end surface of the sealing body 1 is recessed inward to form a concave surface 4, and the other end surface forms a convex surface 3 accordingly. The concave surface 4 has a taper and the radial dimension of the outer end is larger than the radial dimension of the inner end. The side wall where the limiting groove 8 is located is close to the convex surface 3; in this way, when the sealing rubber sleeve is connected to the through hole on the front panel 9 through the sealing card groove 5, the convex surface 3 faces the cockpit 12, and the concave surface 4 faces the engine compartment. When water enters the concave surface 4 area head-on, the water droplets will flow out of the sealing rubber sleeve downward along the inclined surface of the concave surface 4 under the action of gravity to avoid water accumulation inside.

[0040] See also Figure 4 and Figure 5 A mating extension portion 13 which is cylindrical and coaxial with the easing hole 2 is formed on the convex surface 3; in this way, when in use, the control cable 14 passes through the easing hole 2 and the mating extension portion 13 and is sealed and fitted, thereby increasing the fitting length with the control cable 14, which is beneficial to improving the sealing effect of the sealing rubber sleeve and the control cable 14.

[0041] See also Figure 8 and Figure 9 When the sealing rubber sleeve of the utility model is installed on the front panel 9 to form a sealing structure, the two sides of the front panel 9 are the engine compartment and the cockpit 12 respectively, and a through hole is opened on the front panel 9. The front panel 9 has a flange 10 bent toward the cockpit 12 at the through hole; the sealing rubber sleeve is arranged in the through hole and the concave surface 4 faces the engine compartment, the flange 10 is located in the sealing groove 5, and the free end of the flange 10 abuts against the limiting groove 8. The axial size of the flange 10 in the clearance hole 2 is adapted to the width of the sealing groove 5, so that the main sealing strip 6 and the auxiliary sealing strip 6 are in contact with each other. The strip 7 and the abutment portion 11 are sealed and abutted with the flange 10 respectively, and the control cable 14 passes through the clearance hole 2 and the extension portion and is sealed and matched; the sealing structure includes structural changes in the sealing rubber sleeve itself and the through hole of the front panel 9, which is adjusted from the existing flat seal to an overall wrapped seal, and the abutment portion 11, the main sealing strip 6, the auxiliary sealing strip 7 and the limiting groove 8 are added in the sealing card groove 5, which can not only form a more effective multiple seal with the front panel 9, but also has a reliable card connection, can withstand the pressure brought by headwind and water, and will not fall off.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A sealing rubber sleeve, characterized in that: It includes a sealing body, a clearance hole is penetrated in the middle of the sealing body, a sealing groove is arranged on the sealing body and surrounds the clearance hole, the depth direction of the sealing groove corresponds to the radial direction of the clearance hole, and a main sealing strip surrounding the clearance hole is formed on at least one side wall of the sealing groove.

2. The sealing rubber sleeve according to claim 1, wherein: The bottom protrusion of the sealing groove forms a secondary sealing strip surrounding the clearance hole.

3. The seal rubber sleeve according to claim 1, characterized in that: Only one side wall of the sealing slot is convexly provided with a main sealing strip, and the other side wall of the sealing slot is connected with the bottom thereof by a limiting groove surrounding the clearance hole.

4. The sealing rubber sleeve according to claim 3, wherein: In the sealing groove, the side wall where the main sealing strip is located is connected with the bottom through a smooth transition of the arc surface.

5. The sealing rubber sleeve according to claim 4, characterized in that: The main sealing strip and the auxiliary sealing strip are arranged close to the arc surface, and the free ends of the main sealing strip and the auxiliary sealing strip are both in arc shape.

6. The sealing rubber sleeve according to claim 4, wherein: A butting portion is formed on a protrusion on the side wall where the main sealing strip is located, and the butting portion is located on a side of the main sealing strip away from the clearance hole.

7. The sealant sleeve according to claim 6, wherein: In the sealing slot, the side wall where the abutment portion is located is connected with a side of the abutment portion close to the clearance hole through an inclined transition.

8. The sealant sleeve according to claim 7, wherein: In the axial direction of the clearance hole, one end surface of the sealing body is recessed inward to form a concave surface, and the other end surface forms a convex surface accordingly. The concave surface is tapered and the radial dimension of the outer end is larger than the radial dimension of the inner end. The side wall where the limiting groove is located is close to the convex surface.

9. The sealant sleeve according to claim 8, wherein: The convex surface is convexly formed with a matching extension part which is cylindrical and coaxial with the clearance hole.

10. A sealing structure, characterized in that: It includes a front panel and a sealing rubber sleeve as described in claim 9, with an engine compartment and a cockpit on both sides of the front panel respectively, a through hole is opened on the front panel, and the front panel has a flange bent toward the cockpit at the through hole; the sealing rubber sleeve is arranged in the through hole with the concave surface facing the engine compartment, the flange is located in the sealing groove, the free end of the flange abuts in the limiting groove, the axial size of the flange in the clearance hole is adapted to the width of the sealing groove, so that the main sealing strip, the auxiliary sealing strip and the abutting part are respectively sealed and abutted with the flange, and the control cable passes through the clearance hole and the extension part and is sealed and matched.

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