A noise suppression and vibration isolation structure for a swing platform of an excavator

Abstract

This utility model relates to the field of slewing platform structure technology, specifically to a noise suppression and vibration isolation structure for an excavator slewing platform. It includes an upper mounting frame, a lower support frame, and a ring frame assembly. The upper mounting frame is used to mount the vehicle body, and two boom mounting frames are mounted on it for mounting the boom. The lower support frame is located below the upper mounting frame, and a slewing bearing is detachably installed between the lower support frame and the upper mounting frame. In this utility model, through the ring frame assembly, when the vehicle body and chassis generate noise during operation, the sound waves generated will be transmitted outward along the upper mounting frame and the lower support frame. The ring-shaped airbag, under high pressure, compresses the upper mounting frame and the lower support frame, suppressing their vibration and reducing the impact of external vibration on the slewing bearing.

Description

Technical Field

[0001] This utility model relates to the field of slewing platform structure technology, specifically a noise suppression and vibration isolation structure for an excavator slewing platform. Background Technology

[0002] The slewing bearing is installed to the upper and lower frames with bolts. When the frame vibrates violently, it will accelerate the loosening of bolts and fatigue fracture. Continuous vibration and impact loads will be transmitted to key structural components such as the chassis and turntable, causing metal fatigue, weld cracking and even structural deformation, threatening the safety of the entire machine structure and reducing the failure rate of key components. Vibration is one of the main causes of pitting and spalling of raceways / rolling elements, gear tooth breakage and bearing damage in slewing bearings. Noise reduction and vibration isolation structures can effectively absorb impact and slow down vibration transmission, significantly extending the service life of core components such as slewing bearings, reducers, and motors. Therefore, a noise suppression and vibration isolation structure for excavator slewing platforms is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a noise suppression and vibration isolation structure for excavator slewing platforms to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A noise suppression and vibration isolation structure for an excavator slewing platform includes:

[0006] An upper mounting bracket is used to mount the vehicle body. Two boom mounting brackets are mounted on the upper mounting bracket, and the boom mounting brackets are used to mount the boom.

[0007] A lower support frame is located below the upper mounting frame. A slewing bearing is detachably installed between the lower support frame and the upper mounting frame. The lower support frame is used for installation with the chassis.

[0008] A ring frame assembly is installed between an upper mounting frame and a lower support frame. The ring frame assembly includes two annular airbags, which respectively contact the upper mounting frame and the slewing bearing. The annular airbags are used to reduce the vibration of the upper mounting frame and the slewing bearing.

[0009] Furthermore, the ring frame assembly also includes two sets of limiting ring frames, which are fixedly installed on the upper mounting frame and the lower support frame, respectively. The limiting ring frames are used to limit the two sides of the ring-shaped airbag, and a planar bearing is fixedly connected between the two ring-shaped airbags.

[0010] Furthermore, the inner side of the planar bearing is provided with a support ring frame, the inner side wall of the support ring frame is fixedly connected with multiple fixed seats, one end of the fixed seat is fixedly connected with multiple return springs, the bottom end of the return spring is fixedly connected to the adjacent limiting ring frame, the outer side of the support ring frame is provided with a platform, and the bottom ring of the planar bearing is sleeved with the support ring frame.

[0011] Furthermore, an air nozzle is installed on one side of the annular airbag, and a through hole is provided on the limiting ring frame, through which the air nozzle extends to the outside of the limiting ring frame.

[0012] Furthermore, the slewing bearing includes an outer ring and an inner ring, the outer ring and the inner ring are rotatably connected, the outer ring is fixedly installed with the upper mounting bracket, the inner ring is fixedly installed with the lower support bracket, and a mounting cavity is provided in the middle of the lower support bracket.

[0013] Furthermore, the upper mounting bracket is equipped with an abutment bracket, the middle position of the abutment bracket has a cross-shaped structure, a lower top bracket is installed below the abutment bracket, the lower top bracket abuts against the inner bottom surface of the mounting cavity, and a rubber strip is fixedly connected to the outer side of the bottom surface of the lower top bracket.

[0014] Furthermore, a sleeve is fixedly connected to the top of the lower top frame, the middle position of the abutment frame is slidably inserted into the sleeve, and a rubber block is placed at the bottom of the inner end of the sleeve.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. With the ring frame assembly, when the vehicle body and chassis generate noise during operation, the sound waves generated by the noise will be transmitted outward along the upper mounting frame and lower support frame. With the ring airbag, the ring airbag is under high pressure, which makes the ring airbag squeeze the upper mounting frame and lower support frame, suppressing the vibration of the upper mounting frame and lower support frame, thereby reducing the transmission of sound waves on the upper mounting frame and lower support frame, reducing the vibration and noise of the upper mounting frame and lower support frame, and thus reducing the impact of external vibration on the slewing bearing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the slewing bearing structure in this utility model;

[0019] Figure 3 This is a schematic diagram of the overall side view structure of this utility model;

[0020] Figure 4 yes Figure 3 Enlarged view of a portion at point A;

[0021] Figure 5 This is a schematic diagram of the support ring frame structure in this utility model.

[0022] In the diagram: 100, upper mounting bracket; 110, boom mounting bracket; 200, lower support bracket; 210, mounting cavity; 300, slewing bearing; 310, outer ring; 320, inner ring; 400, contact bracket; 410, sleeve; 420, lower top bracket; 500, ring frame assembly; 510, ring-shaped airbag; 511, air nozzle; 520, limiting ring frame; 530, flat bearing; 540, support ring frame; 541, fixed seat; 542, return spring; 543, edge platform. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 In this embodiment of the present invention, a noise suppression and vibration isolation structure for an excavator slewing platform includes an upper mounting frame 100, a lower support frame 200, and a ring frame assembly 500. The upper mounting frame 100 is used to mount the vehicle body, and two boom mounting frames 110 are mounted on the upper mounting frame 100 for mounting the boom. The lower support frame 200 is located below the upper mounting frame 100, and a slewing bearing 300 is detachably mounted between the lower support frame 200 and the upper mounting frame 100. The lower support frame 200 is used for mounting to the chassis. The ring frame assembly 500 is installed between the upper mounting frame 100 and the lower support frame 200. The ring frame assembly 500 includes two annular airbags 510, which respectively contact the upper mounting frame 100 and the slewing bearing 300. The annular airbags 510 are used to reduce the vibration of the upper mounting frame 100 and the slewing bearing 300.

[0025] The annular frame assembly 500 also includes two sets of limiting ring frames 520, which are fixedly mounted on the upper mounting frame 100 and the lower support frame 200, respectively. The limiting ring frames 520 are used to limit the two sides of the annular airbag 510. A plane bearing 530 is fixedly connected between the two annular airbags 510. A support ring frame 540 is provided on the inner side of the plane bearing 530. Multiple fixing seats 5 are fixedly connected to the inner wall of the support ring frame 540. 41. One end of the fixed base 541 is fixedly connected to a plurality of return springs 542. The bottom end of the return springs 542 is fixedly connected to the adjacent limiting ring frame 520. The outer side of the supporting ring frame 540 is provided with a platform 543. The bottom ring of the plane bearing 530 is sleeved with the supporting ring frame 540. An air nozzle 511 is installed on one side of the ring-shaped airbag 510. A through hole is opened on the limiting ring frame 520. The air nozzle 511 passes through the through hole to the outer side of the limiting ring frame 520.

[0026] Specifically, when the vehicle body and chassis generate noise during operation, the sound waves generated by the noise will be transmitted outward along the upper mounting frame 100 and the lower support frame 200. Through the setting of the annular airbag 510, the annular airbag 510 is under high pressure, thereby squeezing the upper mounting frame 100 and the lower support frame 200 by the annular airbag 510, suppressing the vibration of the upper mounting frame 100 and the lower support frame 200, thereby reducing the transmission of sound waves on the upper mounting frame 100 and the lower support frame 200, suppressing the noise generated by the slewing bearing 300, and reducing the vibration on the upper mounting frame 100 and the lower support frame 200. Through the setting of the plane bearing 530, direct contact between the two annular airbags 510 is avoided, reducing the friction between the two annular airbags 510. Through the setting of the return spring 542 and the support ring frame 540, the support ring frame 540 is used to support the plane bearing 530.

[0027] Example 1

[0028] like Figures 3-5 As shown, in this embodiment, the slewing bearing 300 includes an outer ring 310 and an inner ring 320. The outer ring 310 and the inner ring 320 are rotatably connected. The outer ring 310 is fixedly installed with the upper mounting frame 100, and the inner ring 320 is fixedly installed with the lower support frame 200. The lower support frame 200 has a mounting cavity 210 in the middle position. An abutment frame 400 is installed on the upper mounting frame 100. The middle position of the abutment frame 400 has a cross-shaped structure. A lower top frame 420 is installed below the abutment frame 400. The lower top frame 420 abuts against the inner bottom surface of the mounting cavity 210. A rubber strip is fixedly connected to the outer side of the bottom surface of the lower top frame 420. A sleeve 410 is fixedly connected to the top of the lower top frame 420. The middle position of the abutment frame 400 is slidably inserted into the sleeve 410. A rubber block is placed at the bottom of the inner part of the sleeve 410.

[0029] In this embodiment, the cross structure in the middle of the contact frame 400 facilitates the transmission connection between the vehicle body rotation drive shaft and the inner ring 320. The mounting cavity 210 is used to protect the slewing bearing 300, preventing dirt and debris from directly entering the slewing bearing 300. Since the mounting cavity 210 is hollow, when the slewing bearing 300 generates noise, the noise is transmitted to the mounting cavity 210 and causes vibration, which amplifies the noise. With the lower top frame 420, when the inner bottom surface of the mounting cavity 210 vibrates, the vibration is transmitted to the lower top frame 420 and the sleeve 410, and is then abraded by the rubber block inside the sleeve 410, thereby suppressing the vibration in the mounting cavity 210 and reducing the noise generated in the mounting cavity 210.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A noise suppression and vibration isolation structure for an excavator slewing platform, characterized in that, include: An upper mounting bracket (100) is used to mount the vehicle body. Two boom mounting brackets (110) are mounted on the upper mounting bracket (100). The boom mounting brackets (110) are used to mount the boom. A lower support frame (200) is located below the upper mounting frame (100). A slewing bearing (300) is detachably installed between the lower support frame (200) and the upper mounting frame (100). The lower support frame (200) is used for installation with the chassis. A ring frame assembly (500) is installed between an upper mounting frame (100) and a lower support frame (200). The ring frame assembly (500) includes two annular airbags (510). The two annular airbags (510) are in contact with the upper mounting frame (100) and the slewing bearing (300), respectively. The annular airbags (510) are used to reduce the vibration of the upper mounting frame (100) and the slewing bearing (300).

2. The excavator swing platform noise suppression and isolation structure of claim 1, wherein, The ring frame assembly (500) also includes two sets of limiting ring frames (520) in pairs, and the two sets of limiting ring frames (520) are fixedly installed on the upper mounting frame (100) and the lower support frame (200) respectively. The limiting ring frames (520) are used to limit the two sides of the ring-shaped airbag (510), and a plane bearing (530) is fixedly connected between the two ring-shaped airbags (510).

3. The excavator swing platform noise suppression and isolation structure of claim 2, wherein, The inner side of the planar bearing (530) is provided with a support ring frame (540). The inner side wall of the support ring frame (540) is fixedly connected with a plurality of fixed seats (541). One end of the fixed seat (541) is fixedly connected with a plurality of return springs (542). The bottom end of the return spring (542) is fixedly connected to the adjacent limiting ring frame (520). The outer side of the support ring frame (540) is provided with a platform (543). The bottom ring of the planar bearing (530) is sleeved with the support ring frame (540).

4. The excavator swing platform noise suppression and isolation structure of claim 2, wherein, An air nozzle (511) is installed on one side of the annular airbag (510), and a through hole is provided on the limiting ring frame (520). The air nozzle (511) passes through the through hole to the outside of the limiting ring frame (520).

5. The excavator swing platform noise suppression and isolation structure according to any one of claims 1 to 4, characterized in that, The slewing bearing (300) includes an outer ring (310) and an inner ring (320). The outer ring (310) and the inner ring (320) are rotatably connected. The outer ring (310) is fixedly installed with the upper mounting bracket (100). The inner ring (320) is fixedly installed with the lower support bracket (200). The lower support bracket (200) has a mounting cavity (210) in the middle position.

6. The excavator swing platform noise suppression and isolation structure of claim 5, wherein, An abutment frame (400) is installed on the upper mounting bracket (100). The middle position of the abutment frame (400) is cross-shaped. A lower top frame (420) is installed below the abutment frame (400). The lower top frame (420) abuts against the inner bottom surface of the mounting cavity (210). A rubber strip is fixed to the outer side of the bottom surface of the lower top frame (420).

7. The excavator swing platform noise suppression and isolation structure of claim 6, wherein, The top of the lower top frame (420) is fixedly connected to a sleeve (410), and the middle position of the abutment frame (400) is slidably inserted into the sleeve (410). A rubber block is placed at the bottom of the inner side of the sleeve (410).

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