Swing type central rotary hinge structure and loader

Abstract

According to the swing type central rotation hinge structure and the loader, by arranging the rotation bearing, vibration of a rear frame is effectively reduced, the stability of the loader in the operation process is guaranteed, meanwhile, the hinge structure is optimized, and the abrasion speed of accessories is reduced; according to the technical scheme, the device comprises a rotary support, a main hinge frame and an auxiliary hinge frame; the rotary support comprises an outer rolling ring, an inner rolling ring and balls; a first U-shaped groove is formed in the outer circular surface of the inner rolling ring, a second U-shaped groove is formed in the inner circular surface of the outer rolling ring, the first U-shaped groove and the second U-shaped groove form a circular ring groove, an implanting hole is formed in the outer surface of the outer rolling ring, and balls are implanted into the circular ring groove through the implanting hole; a mounting plate is arranged on the plane of one end of the outer rolling ring, and a main hinge frame and an auxiliary hinge frame are arranged on the mounting plate; an inner ring flange hole is formed in the plane of one end of the inner rolling ring, and the mounting plate and the inner ring flange hole are arranged at the two ends of the slewing bearing respectively.

Description

Technical Field

[0001] The invention belongs to the technical field of loaders, and in particular relates to a swing type central rotary hinge structure and a loader. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In the field of engineering machinery and equipment, loaders are an important equipment widely used in various engineering construction scenarios. The articulated structure is a key component for the loader to achieve flexible steering and operation. The front and rear frames of the traditional loader articulated structure can only achieve left and right steering during operation. When the front wheel of the vehicle bounces or passes over an uneven road surface, the front wheel bounce will transmit the vibration to the rear frame. Since the loader, a special engineering vehicle, has no shock-absorbing damping structure, it is easy to cause vibration of the rear frame. On the one hand, it reduces the comfort of the cab and makes it difficult to ensure the stability of the vehicle. It is easy to become unstable under complex working conditions, which seriously threatens the safety of the operation. On the other hand, during shoveling operations, long-term and frequent severe vibrations will accelerate the fatigue damage of structural parts and shorten the overall service life of the loader.

[0004] The upper and lower hinge pins in the traditional structure have the same structure and the same size. Since the lower hinge structure is the main stress point, it is severely worn. Frequent parts replacement not only increases maintenance costs, but also prolongs equipment downtime, seriously affecting project progress. Summary of the invention

[0005] In view of the above problems, the present invention provides a swinging central rotary articulated structure and a loader. By setting a slewing support, the front wheel bouncing is effectively prevented from being transmitted to the rear frame, the vibration of the rear frame is reduced, and the rotation angle is limited. The stability of the loader during operation is ensured, and the articulated structure is optimized to reduce the wear rate of accessories.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In the first aspect, the present invention provides a swing-type central slewing hinge structure, comprising: a slewing support, a main hinge frame and a secondary hinge frame; the slewing support comprises an outer roller, an inner roller and a ball; a first U-shaped groove is provided on the outer circumferential surface of the inner roller, a second U-shaped groove is provided on the inner circumferential surface of the outer roller, the first U-shaped groove and the second U-shaped groove form a circular annular groove, an implantation hole is provided on the outer surface of the outer roller, and the implantation hole is used to implant the ball into the circular annular groove; a mounting plate is provided on the plane at one end of the outer roller, and the main hinge frame and the secondary hinge frame are provided on the mounting plate; an inner ring flange hole is provided on the plane at one end of the inner roller, and the mounting plate and the inner ring flange hole are respectively arranged at two ends of the slewing support;

[0008] The mounting plate is in a convex shape, the main articulated frame is arranged at the lower part of the mounting plate, the auxiliary articulated frame is arranged at the upper part of the mounting plate, and the main articulated frame and the auxiliary articulated frame are used to connect the upper articulated seat and the lower articulated seat of the front frame of the loader.

[0009] Furthermore, two limiting devices are symmetrically arranged on the outer circumferential surface of the outer roller ring and are fixedly arranged between the mounting plate and the rear frame for limiting the rotation angle between the slewing support and the rear frame.

[0010] Furthermore, the limiting device comprises a limiting groove and a limiting block, the limiting groove is fixedly arranged on the mounting plate, the limiting block is fixedly arranged on the rear frame, and the limiting groove and the limiting block are both located on the same circular rotation track.

[0011] Furthermore, the secondary articulated frame is fixedly arranged on the upper part of the mounting plate away from the slewing bearing side, and a shaft sleeve is arranged on the secondary articulated frame, and the shaft sleeve is connected to the upper articulated seat of the front frame through a secondary articulated pin shaft, and a lubricating oil filling port is arranged at the end of the secondary articulated pin shaft, and a lubricating oil channel is arranged at the core part for conveying the lubricating oil to the gap between the secondary articulated pin shaft and the shaft sleeve.

[0012] Furthermore, one end of the secondary hinge pin is fixedly connected to the upper hinge seat through a fastener.

[0013] Furthermore, the main articulated frame is fixedly arranged at the lower part of the mounting plate away from the slewing bearing; steering articulated seats are arranged at both ends of the main articulated frame, an articulated bearing is arranged in the middle part of the main articulated frame, and the articulated bearing is connected to the lower articulated seat of the front frame through the main articulated pin shaft; the inner ring of the articulated bearing is interference fit with the main articulated pin shaft, and the outer ring of the articulated bearing is interference fit with the main articulated frame.

[0014] Furthermore, the steering articulated seat has a support shaft, an auxiliary sleeve and a support seat; the support seat is arranged on a mounting plate on one side of the main articulated frame, and the support seat and the main articulated frame are coaxially provided with an auxiliary sleeve, the length of the auxiliary sleeve is greater than the thickness of the support seat and the main articulated frame, the support shaft is inserted into the support seat and the main articulated frame for articulation with the steering hydraulic rod, and one end of the support shaft is connected to the support seat by a fastener.

[0015] Furthermore, flange sleeves are arranged at both ends of the main hinge pin shaft, respectively. The flange sleeves are interference fit with the main hinge pin shaft and are fixedly connected to the upper hinge frame via fasteners.

[0016] Furthermore, the main hinge pin shaft and the secondary hinge pin shaft are coaxially arranged.

[0017] In a second aspect, the present invention further provides a loader, comprising a swing-type central rotary articulated structure as described above.

[0018] Compared with the prior art, the present invention has the following advantages and positive effects:

[0019] The present application arranges the limit devices symmetrically on the outer circumferential surface of the outer roller ring. When the slewing bearing rotates to the set limit angle, the limit block and the limit groove come into contact, thereby limiting the rotation angle between the slewing support and the rear frame, ensuring the stability of the loader during operation and reducing the risk of vehicle instability due to excessive rotation. At the same time, it effectively prevents the front wheel bouncing from being transmitted to the rear frame, reduces the vibration of the rear frame, improves the comfort of the cab, and also extends the service life of the structural parts.

[0020] The end of the secondary hinge pin shaft of the present application is provided with a lubricating oil filling port, and the core is provided with a lubricating oil channel, which can transport the lubricating oil to the gap between the secondary hinge pin shaft and the sleeve, thereby ensuring good lubrication of the hinged parts, reducing wear, and improving the working stability and service life of the secondary hinge structure; a lubricating oil filling hole is opened on the outer surface of the outer rolling ring and is connected to the circular ring groove, and a grease nozzle is provided at the filling hole, which effectively ensures the lubrication effect of the slewing bearing and avoids wear and fatigue caused by long-term excessive load; the inner ring of the articulated bearing in the middle of the main articulated frame is interference fit with the main articulated pin shaft, and the outer ring is interference fit with the main articulated frame, and bearing covers are provided on both sides, thereby ensuring the working stability and service life of the articulated bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1It is a plan view of the swing type central rotating hinge structure of the present invention;

[0023] Figure 2 This is a three-dimensional view of the swing-type central rotating hinge structure of the present invention.

[0024] In the figure: 1. slewing support; 2. main articulated frame; 3. secondary articulated frame; 4. mounting plate; 5. secondary articulated pin; 6. main articulated pin; 7. limiting groove; 8. limiting block; 9. support seat; 10. support shaft; 11. rear frame; 12. front frame; 13. inner roller; 14. outer roller; 15. oiling nozzle; 16. auxiliary sleeve. DETAILED DESCRIPTION

[0025] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0027] This embodiment provides a swing-type central rotating hinge structure, such as Figure 1-Figure 2 As shown, it comprises: a slewing support 1, a main articulated frame 2 and a secondary articulated frame 3; the slewing support 1 comprises an outer roller ring 14, an inner roller ring 13 and a ball; a first U-shaped groove is provided on the outer circumferential surface of the inner roller ring 13, a second U-shaped groove is provided on the inner circumferential surface of the outer roller ring 14, the first U-shaped groove and the second U-shaped groove form a circular annular groove, an implantation hole is provided on the outer surface of the outer roller ring 14, and the implantation hole is used to implant the ball into the circular annular groove; a lubricating oil injection hole is provided on the outer surface of the outer roller ring 14 The filling hole is connected with the circular ring groove, and a refueling nozzle 15 is arranged at the filling hole; a mounting plate 4 is arranged on the plane at one end of the outer roller ring 14, and a main articulated frame 2 and a secondary articulated frame 3 are arranged on the mounting plate 4; an inner ring flange hole is arranged on the plane at one end of the inner roller ring 13, and the mounting plate 4 and the inner ring flange hole are respectively arranged at two ends of the slewing bearing; the mounting plate 4 is connected to the outer roller ring 14 through a plurality of fasteners, and the inner ring flange hole is connected to the rear frame 11 through a plurality of fasteners.

[0028] The mounting plate 4 is in a convex shape, the main articulated frame 2 is arranged at the lower part of the mounting plate 4, the auxiliary articulated frame 3 is arranged at the upper part of the mounting plate 4, and the main articulated frame 2 and the auxiliary articulated frame 3 are used to connect the upper articulated seat and the lower articulated seat of the front frame 12 of the loader.

[0029] Two limiting devices are symmetrically arranged on the outer circumferential surface of the outer roller ring 14 and are fixedly disposed between the mounting plate 4 and the rear frame 11 to limit the rotation angle between the slewing support 1 and the rear frame 11 .

[0030] The limiting device includes a limiting groove 7 and a limiting block 8, wherein the limiting groove 7 is a U-shaped channel steel or a bent steel plate, and the limiting block 8 is a wedge-shaped steel plate. The limiting groove 7 is fixedly arranged on the mounting plate 4 and connected by welding, and the limiting block 8 is fixedly arranged on the rear frame 11 and connected by welding. The limiting groove 7 and the limiting block 8 are both on the same circular rotation trajectory. When the slewing bearing rotates, relative rotation will occur between the limiting groove 7 and the limiting block 8. When the relative rotation reaches the set limit angle, the limiting block 8 contacts the limiting groove 7, which effectively prevents the front frame 12 and the rear frame 11 of the loader from rotating too much, causing the vehicle to become unstable; at the same time, it can also be achieved that the bouncing of the front wheels during shoveling of the loader will not be transmitted to the rear frame 11, thereby improving the comfort of the cab and the life of the structural parts.

[0031] The auxiliary articulated frame 3 is fixedly arranged on the upper part of the mounting plate 4 away from the slewing bearing. A shaft sleeve is arranged on the auxiliary articulated frame 3. The shaft sleeve is connected to the upper articulated seat of the front frame 12 through the auxiliary articulated pin 5. A lubricating oil filling port is arranged at the end of the auxiliary articulated pin 5, and a lubricating oil channel is arranged at the core for conveying the lubricating oil to the gap between the auxiliary articulated pin 5 and the shaft sleeve.

[0032] One end of the secondary hinge pin 5 is fixedly connected to the upper hinge seat through a fastener

[0033] The main articulated frame 2 is fixedly arranged at the lower part of the mounting plate 4 away from the slewing bearing; steering articulated seats are arranged at both ends of the main articulated frame 2, and an articulated bearing is arranged in the middle part of the main articulated frame 2, and the articulated bearing is connected to the lower articulated seat of the front frame 12 through the main articulated pin shaft 6; the inner ring of the articulated bearing is interference fit with the main articulated pin shaft 6, and the outer ring of the articulated bearing is interference fit with the main articulated frame 2, and bearing covers are also arranged on both sides of the articulated bearing, and the bearing covers are respectively fixed to both sides of the main articulated frame 2 by fasteners to ensure the working stability and service life of the articulated bearing.

[0034] The steering articulated seat comprises a support shaft 10, an auxiliary sleeve 16 and a support seat 9; the support seat 9 is arranged on the mounting plate 4 on one side of the main articulated frame 2, and the support seat 9 and the main articulated frame 2 are coaxially provided with an auxiliary sleeve 16, the length of the auxiliary sleeve 16 is greater than the thickness of the support seat 9 and the main articulated frame 2, the support shaft 10 is inserted into the support seat 9 and the main articulated frame 2, and is used to be articulated with the steering hydraulic rod, and one end of the support shaft 10 is connected to the support seat 9 by a fastener; through the cooperation of the support shaft 10, the auxiliary sleeve 16 and the support seat 9, not only the steering of the loader is realized, but also the structural stability of the steering articulated seat is improved by optimizing the structure of the support shaft 10 and the auxiliary sleeve 16.

[0035] Flange sleeves are arranged at both ends of the main hinge pin 6 respectively. The flange sleeves are interference fit with the main hinge pin 6 and are fixedly connected to the upper hinge frame through fasteners.

[0036] The main hinge pin 6 is coaxially arranged with the secondary hinge pin 5, and the diameter of the main hinge pin 6 is larger than that of the secondary hinge pin 5. Since the position of the lower hinge frame is the main stress point, this part and the main hinge pin 6 wear too fast in the traditional structure. The present invention adopts a tight fit to effectively solve the problem of the lower hinge frame and the main hinge pin 6 wearing too fast.

[0037] The present invention also provides a loader, comprising a swing-type central rotary articulated structure as described above.

[0038] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A swing type central rotary hinge structure, characterized in that: It comprises: a slewing support, a main articulated frame and a secondary articulated frame; the slewing support comprises an outer roller, an inner roller and a ball; a first U-shaped groove is provided on the outer circumferential surface of the inner roller, a second U-shaped groove is provided on the inner circumferential surface of the outer roller, the first U-shaped groove and the second U-shaped groove form a circular annular groove, an implantation hole is provided on the outer surface of the outer roller, and the implantation hole is used to implant the ball into the circular annular groove; a mounting plate is provided on the plane at one end of the outer roller, and the main articulated frame and the secondary articulated frame are provided on the mounting plate; an inner ring flange hole is provided on the plane at one end of the inner roller, and the mounting plate and the inner ring flange hole are respectively arranged at two ends of the slewing support; The mounting plate is in a convex shape, the main articulated frame is arranged at the lower part of the mounting plate, the auxiliary articulated frame is arranged at the upper part of the mounting plate, and the main articulated frame and the auxiliary articulated frame are used to connect the upper articulated seat and the lower articulated seat of the front frame of the loader.

2. A swing type central rotating hinge structure as claimed in claim 1, characterized in that: Two limiting devices are symmetrically arranged on the outer circumferential surface of the outer roller ring and are fixedly arranged between the mounting plate and the rear frame to limit the rotation angle between the slewing support and the rear frame.

3. A swing type central rotating hinge structure as claimed in claim 1, characterized in that: The limiting device comprises a limiting groove and a limiting block, wherein the limiting groove is fixedly arranged on the mounting plate, and the limiting block is fixedly arranged on the rear frame, and the limiting groove and the limiting block are both located on the same circular rotation track.

4. A swing type central rotating hinge structure as claimed in claim 1, characterized in that: The secondary articulated frame is fixedly arranged on the upper part of the mounting plate away from the slewing bearing. A shaft sleeve is arranged on the secondary articulated frame. The shaft sleeve is connected to the upper articulated seat of the front frame through a secondary articulated pin shaft. A lubricating oil filling port is arranged at the end of the secondary articulated pin shaft, and a lubricating oil channel is arranged at the core part for conveying the lubricating oil to the gap between the secondary articulated pin shaft and the shaft sleeve.

5. A swing type central rotating hinge structure as claimed in claim 4, characterized in that: One end of the secondary hinge pin is fixedly connected to the upper hinge seat through a fastener.

6. A swing type central rotating hinge structure as claimed in claim 4, characterized in that: The main articulated frame is fixedly arranged at the lower part of the mounting plate away from the slewing bearing; steering articulated seats are arranged at both ends of the main articulated frame, an articulated bearing is arranged in the middle part of the main articulated frame, and the articulated bearing is connected to the lower articulated seat of the front frame through the main articulated pin shaft; the inner ring of the articulated bearing is interference fit with the main articulated pin shaft, and the outer ring of the articulated bearing is interference fit with the main articulated frame.

7. A swing type central rotating hinge structure as claimed in claim 6, characterized in that: The steering articulated seat comprises a support shaft, an auxiliary sleeve and a support seat; the support seat is arranged on a mounting plate on one side of the main articulated frame, and the support seat and the main articulated frame are coaxially provided with an auxiliary sleeve, the length of the auxiliary sleeve is greater than the thickness of the support seat and the main articulated frame, the support shaft is inserted into the support seat and the main articulated frame for articulation with the steering hydraulic rod, and one end of the support shaft is connected to the support seat by a fastener.

8. A swing type central rotating hinge structure as claimed in claim 7, characterized in that: Flange sleeves are arranged at both ends of the main hinge pin shaft respectively. The flange sleeves are interference fit with the main hinge pin shaft and are fixedly connected with the upper hinge frame through fasteners.

9. A swing type central rotating hinge structure as claimed in claim 8, characterized in that: The main hinge pin shaft and the secondary hinge pin shaft are coaxially arranged.

10. A loader, characterized in that: It comprises a swinging central rotating hinge structure as described in any one of claims 1 to 9.

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