Flexible fixing structure under vibration working condition and road roller thereof

Abstract

The utility model discloses a flexible fixing structure under a vibration working condition and a road roller thereof, and belongs to the technical field of engineering machinery. The defect that in the prior art, when rigid fixing is conducted on the middle portion of a traditional corrugated pipe, a weld joint of the corrugated pipe cracks is overcome. The main structure of the device comprises an exhaust corrugated pipe, a fixing support and an exhaust pipe mounting support which are matched with each other are arranged on the outer ring of the exhaust corrugated pipe, a buffering and damping mechanism is arranged between the fixing support and the exhaust pipe mounting support and comprises a tension spring, one end of the tension spring is connected with the exhaust pipe mounting support through an adjusting assembly, and the other end of the tension spring is connected with the exhaust pipe mounting support. The other end is connected with the fixing support through an adjusting assembly. The utility model is mainly applied to engineering machinery such as a road roller and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction machinery, and more specifically, it relates to a flexible fixing structure under vibration conditions and a road roller thereof. Background Art

[0002] The small double-drum road roller is equipped with a three-cylinder engine, which has a larger vibration at the idle speed compared with a four-cylinder engine. The muffler is fixed at the lower part of the frame. One end of the engine exhaust bellows is connected to the engine exhaust port, and the other end is connected to the muffler, with a length exceeding 1 m. It is a typical pipeline under long-distance vibration conditions.

[0003] The existing solution is to rigidly fix the middle part of the bellows. However, its disadvantages are as follows: If rigid fixation is adopted in the middle, the vibration will be isolated in the pipeline section from the vibration source to the fixed end. The vibration frequencies at both ends of this pipeline section are different, and the welds of the bellows are prone to cracking. If the middle part of the bellows is not fixed, the middle part of the bellows will bear a large vibration stress, and there is also a risk of weld cracking. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a flexible fixing structure under vibration conditions and a road roller thereof.

[0005] To achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0006] A flexible fixing structure under vibration conditions, including an exhaust bellows. A fixing bracket and an exhaust pipe mounting bracket that cooperate with each other are arranged on the outer circle of the exhaust bellows. A buffer and vibration damping mechanism is arranged between the fixing bracket and the exhaust pipe mounting bracket. The buffer and vibration damping mechanism includes a tension spring. One end of the tension spring is connected to the exhaust pipe mounting bracket through an adjusting component, and the other end is connected to the fixing bracket through an adjusting component.

[0007] Preferably, the adjusting component includes a bolt and two nuts. The end hook of the tension spring is hooked on the screw of the bolt and clamped by the two nuts.

[0008] Preferably, the fixing bracket is welded to the exhaust bellows.

[0009] Preferably, an arc-shaped plate for cooperating with the exhaust bellows for installation is arranged on one side surface of the exhaust pipe mounting bracket.

[0010] Preferably, an installation hole for fixing the exhaust bellows is arranged at the lower end of the exhaust pipe mounting bracket.

[0011] A road roller, on which the flexible fixing structure under vibration conditions as described above is installed.

[0012] Preferably, the exhaust bellows is fixedly connected to the hydraulic oil tank or the vehicle frame through the mounting holes on the exhaust pipe mounting bracket.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By arranging a fixed bracket and an exhaust pipe mounting bracket on the outer circle of the exhaust bellows and providing a buffer and shock absorption mechanism including a tension spring between the two, the impact force caused by engine vibration or other mechanical movements can be effectively absorbed and reduced, thereby protecting the exhaust system from damage and extending its service life;

[0015] 2. The design of the adjustment component including bolts and nuts allows users to adjust the tension of the tension spring according to actual needs, optimize the shock absorption effect according to different working environments and conditions, and also facilitate maintenance and adjustment;

[0016] 3. The welded connection between the fixed bracket and the exhaust bellows provides higher strength and reliability, preventing loosening or fracture under harsh working conditions and ensuring the stability and safety of the entire system;

[0017] 4. The arc-shaped plate design on the exhaust pipe mounting bracket can better fit the exhaust bellows, making the installation more stable, helping to evenly distribute stress, and reducing damage caused by local stress concentration;

[0018] 5. Fixing the exhaust bellows to the hydraulic oil tank or the vehicle frame through the mounting holes not only simplifies the installation process but also ensures the positioning accuracy of the exhaust system, reduces the position deviation caused by movement or vibration, and enhances the overall coordination and functionality of the system;

[0019] 6. Compared with rigid fixing, flexible fixing can not only support but also reduce the vibration stress of the pipeline. The present utility model can be applied to steel pipes with harsh vibration conditions;

[0020] 7. The flexible fixing of the pipeline is achieved through the tension of the tension spring. The tension spring can be stretched and allows a certain displacement of the fixed part. By changing the number of turns of different tension springs, the pre-tension of the tension spring can be set, resulting in different tightening effects;

[0021] In summary, the present utility model leads out the long-distance exhaust, realizes the flexible fixing of the exhaust bellows by tightening and fitting with a tension spring. On the one hand, it supports the middle part of the bellows to avoid the weld cracking caused by the long-term suspension of the middle part of the pipe; on the other hand, compared with rigid fixing, flexible fixing does not isolate vibration but buffers vibration, and the generated vibration stress is smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural schematic diagram of the present utility model;

[0023] Figure 2 is a schematic structural view of the present utility model;

[0024] Figure 3 is a schematic structural view of the present utility model in the installation and use state.

[0025] In the figure: 1, exhaust bellows; 2, bolt; 3, hydraulic oil tank; 4, nut; 5, exhaust pipe mounting bracket; 6, tension spring; 7, fixed bracket; 8, vehicle frame; 51, arc plate; 52, mounting hole; 61, hook. Specific embodiments

[0026] The present utility model will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0027] Embodiment 1:

[0028] As Figure 1-2 shown, a flexible fixing structure under vibration conditions includes an exhaust bellows 1. The upper end of the exhaust bellows 1 is connected to the exhaust gas outlet, and the lower end is connected to the intake port of the muffler. A mutually cooperating fixed bracket 7 and an exhaust pipe mounting bracket 5 are arranged on the outer ring of the exhaust bellows 1. A buffer and vibration damping mechanism is arranged between the fixed bracket 7 and the exhaust pipe mounting bracket 5. The buffer and vibration damping mechanism includes a tension spring 6. The exhaust bellows 1 is attached and fixed to the exhaust pipe mounting bracket 5 by the tension of the tension spring 6. One end of the tension spring 6 is connected to the exhaust pipe mounting bracket 5 through an adjusting component, and the other end is connected to the fixed bracket 7 through an adjusting component. Flexible fixing is adopted at the middle of the exhaust bellows 1, which can not only support the exhaust bellows 1 but also buffer the vibration. Different from the rigid fixing that completely isolates the vibration, therefore, the vibration stress received by the exhaust bellows 1 in this embodiment is small.

[0029] Embodiment 2:

[0030] A flexible fixing structure under vibration conditions is different from Embodiment 1 in that the adjusting component includes a bolt 2 and two nuts 4. The end hook 61 of the tension spring 6 is hooked on the screw of the bolt 2 and clamped by two nuts 4. The design of the adjusting component including the bolt 2 and the nut 4 allows the user to adjust the tension of the tension spring 6 according to actual needs, can optimize the vibration damping effect according to different working environments and conditions, and can also be conveniently maintained and adjusted.

[0031] In this embodiment, by setting the pre-tension of the tension spring 6, it can be realized that when the engine idles and shakes, the fixed end can not only support but also allow a certain displacement amount, so as to realize the buffering of vibration.

[0032] Furthermore, the fixed bracket 7 is welded to the exhaust bellows 1. The welded connection between the fixed bracket 7 and the exhaust bellows 1 provides higher strength and reliability, preventing loosening or breakage under harsh working conditions and ensuring the stability and safety of the entire system.

[0033] Furthermore, one side of the exhaust pipe mounting bracket 5 is provided with an arc-shaped plate 51 for mating installation with the exhaust bellows 1; the lower end of the exhaust pipe mounting bracket 5 is provided with a mounting hole 52 for fixing the exhaust bellows 1.

[0034] Embodiment 3:

[0035] As Figure 3 shown, a road roller is provided with a flexible fixing structure under the vibration condition as described in Embodiment 1 or Embodiment 2.

[0036] Furthermore, the exhaust bellows 1 is fixedly connected to the hydraulic oil tank 3 or the vehicle frame 8 through the mounting hole 52 on the exhaust pipe mounting bracket 5. Fixing the exhaust bellows 1 to the hydraulic oil tank 3 or the vehicle frame 8 through the mounting hole 52 not only simplifies the installation process but also ensures the positioning accuracy of the exhaust system, reduces the position deviation caused by movement or vibration, and enhances the overall coordination and functionality of the system.

Claims

1. A flexible fixed structure under vibration conditions, comprising an exhaust bellows (1), characterized in that: The outer ring of the exhaust bellows (1) is provided with a fixed bracket (7) and an exhaust pipe mounting bracket (5) that cooperate with each other, and a buffer vibration reduction mechanism is provided between the fixed bracket (7) and the exhaust pipe mounting bracket (5), and the buffer vibration reduction mechanism includes a tension spring (6), one end of the tension spring (6) is connected to the exhaust pipe mounting bracket (5) through an adjustment component, and the other end is connected to the fixed bracket (7) through an adjustment component.

2. The flexible fixing structure under vibration conditions according to claim 1, characterized in that: The adjustment assembly comprises a bolt (2) and two nuts (4); an end hook (61) of a tension spring (6) is hooked on the screw rod of the bolt (2) and is clamped by the two nuts (4).

3. The flexible fixing structure under vibration conditions according to claim 1, characterized in that: The fixing bracket (7) is connected to the exhaust bellows (1) by welding.

4. The flexible fixing structure under vibration conditions according to any one of claims 1 to 3, characterized in that: A curved plate (51) for matching and mounting with the exhaust bellows (1) is provided on one side of the exhaust pipe mounting bracket (5).

5. The flexible fixing structure under vibration conditions according to claim 4, characterized in that: The lower end of the exhaust pipe mounting bracket (5) is provided with a mounting hole (52) for fixing the exhaust bellows (1).

6. A road roller, characterized in that: The road roller is installed with a flexible fixing structure under vibration conditions as claimed in claim 5.

7. The road roller according to claim 6, characterized in that: The exhaust bellows (1) is fixedly connected to the hydraulic oil tank (3) or the vehicle frame (8) via a mounting hole (52) on an exhaust pipe mounting bracket (5).

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