A shock absorption device for a bus after-treatment system

Abstract

This utility model provides a shock absorption device for a bus aftertreatment system, belonging to the technical field of bus aftertreatment systems. It includes a fixed bracket and a clamp, which are connected to the fixed bracket by connecting bolts. A rubber shock-absorbing pad and a stainless steel shock-absorbing pad are sleeved on the outside of the connecting bolts. The rubber shock-absorbing pad is located above the fixed bracket, and the stainless steel shock-absorbing pad is located between the fixed bracket and the clamp. A nut is threaded onto the end of the connecting bolt away from the bolt head. This utility model can prevent the aftertreatment shock-absorbing pads from prematurely aging and losing their shock-absorbing function.

Description

Technical Field

[0001] This utility model belongs to the technical field of bus after-treatment systems, and particularly relates to a shock absorption device for bus after-treatment systems. Background Technology

[0002] The bus aftertreatment system refers to a series of devices installed downstream of the bus engine, mainly used to further reduce pollutants emitted by the engine and ensure that vehicle emissions meet national emission standards. Currently, the aftertreatment systems of large and medium-sized buses are becoming increasingly heavy due to emission upgrades. They are generally fixed to a fixed bracket using clamps, and then to the vehicle frame beam using the fixed bracket. To reduce vibration and impact, a soft pad assembly is usually installed between the clamps and the fixed bracket.

[0003] The existing soft pad assembly uses two rubber damping pads fitted on the connecting bolts between the clamp and the fixed bracket, and then tightened with nuts. One rubber damping pad is close to the clamp, and the other is close to the fixed bracket. The appropriate stiffness and damping of the rubber damping pads themselves can attenuate vibrations.

[0004] Because the rubber damping pads of this type of soft pad device are directly exposed to heat radiation near the clamp, and are more prone to fatigue when the nut is tightened, they are prone to premature aging and loss of damping effect. Utility Model Content

[0005] In view of the defects or deficiencies in the existing technology, this utility model provides a shock absorption device for a bus after-treatment system, which can prevent the after-treatment shock absorption pad from aging prematurely and losing its shock absorption function.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An embodiment of this utility model provides a shock absorption device for a bus after-treatment system, including a fixed bracket and a clamp. The clamp and the fixed bracket are connected by a connecting bolt. A rubber shock-absorbing pad and a stainless steel shock-absorbing pad are sleeved on the outside of the connecting bolt. The rubber shock-absorbing pad is located above the fixed bracket, and the stainless steel shock-absorbing pad is located between the fixed bracket and the clamp. A nut is threadedly connected to the end of the connecting bolt away from the bolt nut.

[0008] Furthermore, both the rubber damping pad and the stainless steel wire damping pad are cylindrical.

[0009] Furthermore, mounting holes are provided at the central axis of both the rubber damping pad and the stainless steel wire damping pad.

[0010] Furthermore, the rubber damping pad is positioned close to the bolt nut, and a gasket is provided between the rubber damping pad and the bolt nut.

[0011] Furthermore, the diameter of the gasket is the same as the diameter of the rubber damping pad, and the top surface of the rubber damping pad is in contact with the gasket.

[0012] Furthermore, a limiting hole is provided at the end of the connecting bolt away from the nut, and the axis of the limiting hole is perpendicular to the axis of the connecting bolt.

[0013] Furthermore, the lower surface of the nut is provided with multiple limiting grooves, which are adapted to the limiting holes on the connecting bolt.

[0014] Furthermore, multiple limiting grooves are formed on the lower surface of the nut, and the multiple limiting grooves are arranged in a ring array and are symmetrically arranged in pairs.

[0015] Furthermore, a cotter pin is inserted into the limiting hole, with both ends of the cotter pin located in the limiting grooves on the nut.

[0016] Furthermore, the nut is located below the clamp.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model uses rubber damping pads and stainless steel wire damping pads fitted onto the connecting bolts. The rubber damping pads have appropriate stiffness and damping to attenuate vibrations and ensure the damping effect. The stainless steel wire damping pads have high temperature resistance to prevent premature aging and loss of damping effect due to direct heat radiation.

[0019] 2. This utility model uses a limiting hole on the connecting bolt and a limiting groove on the lower surface of the nut. A cotter pin is inserted into the limiting hole, and both ends of the cotter pin are located in the limiting groove. The cotter pin is used to prevent the nut from loosening. The nut only needs to ensure that the upper and lower shock-absorbing pads are in contact with the bracket without gaps. It does not need to be tightened too much, which would cause the shock-absorbing pads to be over-compressed and lose their shock-absorbing function. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the post-processing shock absorption device in an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the installation of the post-treatment shock absorption device in an embodiment of this utility model;

[0022] The components include: 1. connecting bolts; 2. washers; 3. rubber shock-absorbing pads; 4. stainless steel wire shock-absorbing pads; 5. nuts; 6. limiting grooves; 7. cotter pins; 8. clamps; and 9. fixing brackets. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] A typical embodiment of this utility model is as follows: Figure 1 As shown, a vibration damping device for a bus after-treatment system includes a connecting bolt 1, a rubber damping pad 3, and a stainless steel wire damping pad 4. A limiting hole is provided at the end of the connecting bolt 1 away from the nut, and the axis of the limiting hole is perpendicular to the axis of the connecting bolt 1. Both the rubber damping pad 3 and the stainless steel wire damping pad 4 are sleeved on the outside of the connecting bolt. The rubber damping pad 3 attenuates vibration through its appropriate stiffness and damping, and can provide a good vibration damping effect. The stainless steel wire damping pad 4 has high temperature resistance and also has a certain vibration damping effect.

[0025] Both the rubber damping pad 3 and the stainless steel wire damping pad 4 are cylindrical, with mounting holes at their central axes. The rubber damping pad 3 and the stainless steel wire damping pad 4 are fitted onto the outside of the connecting bolt 1 through the mounting holes. The rubber damping pad 3 is positioned close to the nut of the bolt 1. A washer 2 is also placed between the rubber damping pad 3 and the nut of the bolt 1. The diameter of the washer 2 is the same as the diameter of the rubber damping pad 3. The top surface of the rubber damping pad 3 is in contact with the washer 2, thereby preventing the upper surface of the rubber damping pad 3 from directly contacting the nut of the bolt 1 and being damaged. At the same time, it also increases the force-bearing area of ​​the rubber damping pad 3, giving full play to the damping effect of the rubber damping pad 3.

[0026] The outer side wall of the connecting bolt 1 away from the nut is provided with an external thread, and a nut 5 is threaded onto the external thread. The nut 5 is used to lock the rubber shock-absorbing pad 3 and the stainless steel wire shock-absorbing pad 4. Multiple limiting grooves 6 are opened on the lower surface of the nut 5. The multiple limiting grooves 6 are arranged in a ring array and are symmetrically arranged in pairs.

[0027] The limiting groove 6 is adapted to the limiting hole on the connecting bolt 1. A cotter pin 7 is inserted into the limiting hole. The two ends of the cotter pin 7 are respectively located in the limiting groove 6 on the nut 5, thereby preventing the nut 5 from rotating and achieving the effect of preventing loosening.

[0028] When using, such as Figure 2As shown, the clamp 8 is fixed to the fixed bracket 9 using the aftertreatment damping device. The clamp 8 is annular, consisting of two semi-circular structures, which can be fitted onto the outside of the aftertreatment device and fixed. The top of the clamp 8 is provided with a connecting plate connected to the aftertreatment damping device. The fixed bracket 9 is a plate-shaped structure, welded to the bottom beam of the vehicle frame. Both the connecting plate and the fixed bracket 9 have bolt holes for fixing the aftertreatment damping device. Align the bolt holes on the fixed bracket 9 and the clamp 8, and place the rubber damping pad 3 and the gasket 2 on the fixed bracket. Above the bracket 9, place the stainless steel wire shock-absorbing pad 4 between the fixed bracket 9 and the clamp 8. Pass the connecting bolt through the washer 2, the rubber shock-absorbing pad 3, the fixed bracket 9, the stainless steel wire shock-absorbing pad 4 and the clamp 8 in sequence. Screw the nut 5 into the connecting bolt below the clamp 8. Insert the cotter pin 7 into the limiting hole. The two ends of the cotter pin 7 are located in the nut limiting groove 6 to prevent the nut 5 from loosening. The nut 5 only needs to ensure that the upper and lower shock-absorbing pads are in contact with the bracket without gaps. It does not need to be tightened too much, which would cause the shock-absorbing pads to be over-compressed and lose their shock-absorbing effect.

[0029] The rubber damping pad 3 is placed above the fixed bracket 9. During operation, the rubber damping pad 3 mainly bears the pressure deformation of the post-treatment system, giving full play to the damping effect of the rubber damping pad 3 and ensuring the damping effect of the post-treatment system. The stainless steel wire damping pad 4 is placed below the fixed bracket 9. During operation, the high temperature resistance of the stainless steel wire damping pad 4 can be fully utilized to avoid premature aging and loss of damping effect due to direct heat radiation. Moreover, the damping capacity of the stainless steel wire damping pad 4 can also meet the usage requirements under bumpy conditions.

[0030] This invention utilizes rubber damping pads and stainless steel wire damping pads fitted onto connecting bolts. The rubber damping pads, with their appropriate stiffness and damping, attenuate vibrations and ensure damping effect. The stainless steel wire damping pads, with their high-temperature resistance, prevent premature aging and loss of damping function due to direct heat radiation.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shock absorption device for a bus aftertreatment system, characterized in that, It includes a fixed bracket and a clamp, which are connected by a connecting bolt. A rubber damping pad and a stainless steel damping pad are fitted on the outside of the connecting bolt. The rubber damping pad is located above the fixed bracket, and the stainless steel damping pad is located between the fixed bracket and the clamp. A nut is threaded onto the end of the connecting bolt away from the bolt nut.

2. The shock absorption device for a bus aftertreatment system as described in claim 1, characterized in that, Both the rubber damping pads and the stainless steel wire damping pads are cylindrical.

3. The shock absorption device for a bus aftertreatment system as described in claim 1, characterized in that, Both the rubber damping pad and the stainless steel wire damping pad have mounting holes at the center axis.

4. The shock absorption device for a bus aftertreatment system as described in claim 1, characterized in that, The rubber shock-absorbing pad is positioned close to the bolt nut, and a gasket is placed between the rubber shock-absorbing pad and the bolt nut.

5. The shock absorption device for a bus aftertreatment system as described in claim 4, characterized in that, The diameter of the gasket is the same as the diameter of the rubber damping pad, and the top surface of the rubber damping pad is in contact with the gasket.

6. The shock absorption device for a bus aftertreatment system as described in claim 1, characterized in that, A limiting hole is provided at the end of the connecting bolt away from the nut, and the axis of the limiting hole is perpendicular to the axis of the connecting bolt.

7. A shock absorption device for a bus aftertreatment system as described in claim 6, characterized in that, The lower surface of the nut is provided with multiple limiting grooves, which are adapted to the limiting holes on the connecting bolt.

8. The shock absorption device for a bus aftertreatment system as described in claim 7, characterized in that, Multiple limiting slots are arranged in a ring array, and the multiple limiting slots are set symmetrically in pairs.

9. A shock absorption device for a bus aftertreatment system as described in claim 8, characterized in that, A cotter pin is inserted into the limiting hole, with both ends of the cotter pin located in the limiting grooves on the nut.

10. The shock absorption device for a bus aftertreatment system as described in claim 1, characterized in that, The nut is located below the clamp.

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