A hinge device sealing structure and articulated dump truck

Abstract

The application discloses a kind of hinge device sealing structure and articulated dump truck, including hinge body, pipe shaft, bearing, thrust ring, O-ring, sealing ring;Pipe shaft extends from hinge body;Bearing is installed in the seat cylinder of trailer, and there is a bearing in front and back of seat cylinder, and pipe shaft is inserted into bearing, and can be relatively rotated with bearing;Thrust ring is connected with the end of pipe shaft, and can be relatively rotated with bearing;O-ring is installed on the groove formed by the end surface of hinge body and bearing and the groove formed by the end surface of thrust ring and bearing;Sealing ring is sleeved outside O-ring, one end is fixed on the outer diameter of hinge body or thrust ring, and the other end is tightly attached to the outer diameter of bearing end surface, and can be relatively rotated with bearing.The application can make the installation size precision requirement of hinge device sealing low, such as aperture, coaxiality, roughness, easy and convenient to install, and low in cost, can adapt to harsh working conditions, prevent external pollutants from invading, little affected by installation size error, good and stable sealing performance.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of hinge device sealing structure, in particular to a kind of hinge type self-unloading vehicle hinge device sealing structure. BACKGROUND

[0002] The hinge type self-unloading vehicle is composed of front tractor and rear trailer and is connected with hinge device.The hinge device rotates around nominal vertical axis, so that front tractor drives rear trailer at different angles, thereby effectively operating machine.The hinge device can also rotate around nominal horizontal axis parallel to machine long side, so that tractor and trailer can independently swing horizontally, and the self-unloading vehicle can better cross rough road section by the action of machine suspension.In order to facilitate the above operation, within the scope of design limitation, trailer must be able to freely swing around hinge device upper tube shaft.

[0003] The working environment of hinge type self-unloading vehicle is very harsh, and it is usually applied in non-ferrous metal mine or coal mine with more rainy season and muddy road.The rear trailer and tube shaft relatively rotate through bearing, and both ends are usually sealed with grease and prevented from external pollution in the form of skeleton oil seal, etc.The skeleton oil seal has high requirement for installation precision, is difficult to manufacture and has high cost, and sealing failure is always caused by various reasons in actual application process, such as large shaft runout and serious wear of sealing lip due to silt, etc.Sealing failure will lead to poor lubrication of bearing and greatly shorten the service life of bearing. SUMMARY

[0004] In order to solve the problems existing in the prior art, the present application provides a kind of hinge device sealing structure, which has low requirement for installation size precision such as hole diameter, coaxiality and roughness, is easy to install and has low cost.The sealing structure can adapt to harsh working condition environment, has small influence of installation size error on sealing property, good and stable sealing performance and long service life.

[0005] To achieve the above object, the technical scheme provided by the present application is as follows:

[0006] The first aspect of the present application discloses a kind of hinge device sealing structure, comprising:

[0007] hinge body;

[0008] tube shaft, which extends from the hinge body;

[0009] bearing, which is installed in the seat cylinder of rear trailer in walking machine, one bearing is arranged at the front end and rear end of the seat cylinder respectively, the tube shaft is inserted through the two bearings, and the tube shaft and the bearing can relatively rotate;

[0010] thrust ring, which is connected with the end of tube shaft located in the seat cylinder and can relatively rotate with the bearing in the seat cylinder;

[0011] Two O-rings are respectively installed on the grooves formed by the abutment of the hinge body and the bearing end face and the abutment of the thrust ring and the bearing end face;

[0012] Two sealing rings are respectively installed outside the two O-rings, one end of one of the sealing rings is fixed on the hinge body and the other end is tightly abutted on the outer diameter of the bearing end face and can rotate relative to the bearing, and one end of the other sealing ring is fixed on the outer diameter of the thrust ring and the other end is tightly abutted on the outer diameter of the bearing end face and can rotate relative to the bearing.

[0013] In some embodiments, the bearing end part is provided with a flange surface for use as a thrust surface, the bearing at the hinge body and the rear end surface of the hinge body form a first thrust surface, and the bearing at the thrust ring and the end surface of the thrust ring form a second thrust surface.

[0014] In some embodiments, a circumferential chamfer is provided on the outer end of the bearing end part flange, the rear end surface of the hinge body, and the end surface of the thrust ring, a circumferential V-shaped groove is formed on the first thrust surface and the second thrust surface, and an O-ring is installed in the groove.

[0015] In some embodiments, the thrust ring and the pipe shaft are connected by screwing the inner thread of the thrust ring and the outer thread at the end of the pipe shaft, the thrust ring is fastened by screwing, and is tightly abutted on the bearing flange surface, so as to clamp the hinge device on the trailer.

[0016] In some embodiments, the end of the pipe shaft can be directly provided with an outer thread on the outer diameter of the pipe shaft, or an axle seat with an outer thread is assembled at the end of the pipe shaft.

[0017] In some embodiments, the outer side circumferential surface of the sealing ring is provided with a clamp installation groove, one of the sealing rings is fixed on the rear end outer diameter of the hinge body by a clamp, and the other sealing ring is fixed on the outer diameter of the thrust ring by a clamp.

[0018] In some embodiments, the inner side circumferential surface of the sealing ring is provided with a circumferential protrusion, and the rear end of the hinge body and the thrust ring are provided with a matching groove, which are installed by matching to prevent axial movement of the sealing ring.

[0019] In some embodiments, a circumferential groove is provided on the outer side circumferential surface of the sealing ring for installing a circumferential spring, and the end of the sealing ring is tightly abutted on the outer diameter of the bearing flange by the clamping force of the spring.

[0020] In some embodiments, a cut is provided in the sealing ring to facilitate the installation and removal of the sealing ring.

[0021] In some embodiments, a concave-convex engagement groove is provided at the joint of the cut to facilitate connection and installation.

[0022] In some embodiments, a semicircular groove is provided on the inner side circumferential surface of the sealing ring and is sleeved outside the O-ring.

[0023] The second aspect of the present invention discloses an articulated dump truck equipped with the aforementioned articulated device sealing structure.

[0024] Based on the application of the above technical solutions, the beneficial effects of this invention compared with the prior art are as follows:

[0025] The hinged device sealing structure disclosed in this invention is a more reliable solution with lower requirements for installation dimensional accuracy such as bore diameter, coaxiality, and roughness. It is easy and convenient to install and inexpensive. This sealing structure can adapt to harsh working environments, its sealing performance is minimally affected by installation dimensional errors, it has good and stable sealing performance, and a long service life. Attached Figure Description

[0026] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0027] In the attached diagram:

[0028] Figure 1 This is a structural diagram of the walking machine described in this invention;

[0029] Figure 2 This is a cross-sectional view of the hinge device structure described in this invention;

[0030] Figure 3 This is an enlarged view of the sealing structure of the hinge device described in this invention (i.e.) Figure 2 (See enlarged view of Part I shown).

[0031] Figure 4 This is an enlarged view of the sealing structure of the hinge device described in this invention (i.e.) Figure 2 (Enlarged view of Part II shown).

[0032] Figure 5 This is a structural diagram of the sealing ring described in this invention.

[0033] Explanation of reference numerals in the attached drawings: 1. Walking machine; 2. Front tractor; 3. Rear trailer; 4. Articulation device; 5. Cab; 6. Engine hood; 7. Wheel; 8. Cargo box; 11. Articulation body; 12. Bearing; 13. Seat; 14. Tube shaft; 15. Sealing ring; 16. Bolt; 17. Thrust ring; 18. Locking plate; 19. Shaft seat; 20. Bolt; 31. Clamp; 32. Spring; 33. O-ring; 34. First thrust surface; 41. Second thrust surface; 51. Clamp mounting groove; 52. Circumferential groove; 53. Concave-convex meshing groove.

[0034] It is to be understood that the drawings and description are not intended to limit the concepts to the specific embodiments presented but are intended to provide illustrative discussions of the nature of the application. Embodiments

[0035] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments with reference to the drawings in the embodiments of the present application. The following embodiments are used to explain the present application but not to limit the scope of the present application.

[0036] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] Figure 1 A walking machine 1 is shown. In this case, it is a articulated dump truck that loads material at a first location, transports the material to a second location and then dumps the material. The walking machine 1 is an articulated dump truck that is made up of a front tractor 2 and a rear trailer 3 that are connected by an articulation 4. The front tractor 2 can be equipped with a cab 5 to facilitate control of the machine and various components underneath the hood 6, power the machine and drive the machine. The front tractor 2 can be supported and driven by a powertrain system equipped with one or more pairs of wheels or tires 7, although alternative powertrain systems such as track systems can also be used. The rear trailer 3 can be equipped with a cargo box 8 for loading material. The rear trailer 3 is supported by a powertrain system equipped with one or more pairs of wheels and tires 7. The walking machine 1 is configured to allow relative rotational movement of the front tractor 2 and the rear trailer 3 by the articulation 4.

[0039] Figure 2The sealing structure of the hinged device 4 is shown. The pipe shaft 14 extends from the hinged body 11, and is connected to the hinged body 11 by welding. The front end of the hinged body 11 is connected to the front tractor 2. The end face of the bearing 12 is provided with a flange face, which is installed in the seat cylinder 13 of the rear trailer 3. The seat cylinder 13 is provided with a bearing 12 at the front end and the rear end, respectively. The outer diameter of the bearing 12 is connected to the inner diameter of the seat cylinder 13 in an interference fit. The pipe shaft 14 is inserted through the two bearings 12. The pipe shaft 14 and the bearing 12 can rotate relative to each other, so that the rear trailer 3 and the front tractor 2 can rotate relative to each other. The shaft seat 19 is connected to the end of the pipe shaft 14 by the bolt 16. The thrust ring 17 is located at the end of the pipe shaft 14 opposite to the hinged body 11. The thrust ring 17 is connected to the outer thread of the shaft seat 19 by the inner thread of the thrust ring 17. The thrust ring 17 is fastened by screwing, so that the thrust ring 17 is tightly attached to the flange face of the bearing 12, so as to clamp the hinged device 4 on the rear trailer 3. The thrust ring 17 can rotate relative to the bearing 12. In an alternative design, the outer diameter of the end of the pipe shaft 14 is provided with an external thread, and the thrust ring 17 can be directly screwed onto the external thread of the pipe shaft 14.

[0040] As shown in Figure 3 , Figure 4 、 Figure 5 The flange face of the bearing 12 is attached to the rear end face of the hinged body 11 to form a first thrust face 34. The flange face of the bearing 12 is also attached to the end face of the thrust ring 17 to form a second thrust face 41. The outer end of the flange face of the bearing 12, the rear end face of the hinged body 11, and the end face of the thrust ring 17 are all provided with a circumferential chamfer. The first thrust face 34 and the second thrust face 41 are both provided with a circumferential V-shaped groove for installing an O-ring 33, which is used to retain lubricating grease and prevent external contaminants from entering. A sealing ring 15 is sleeved outside the O-ring 33. One end of the sealing ring 15 is fixed to the outer diameter of the hinged body 11 or the thrust ring 17, and the other end of the sealing ring 15 is tightly attached to the outer diameter of the end face of the bearing 12, and can rotate relative to the bearing. The sealing ring 15 is used to prevent external contaminants from entering. The outer diameter of the sealing ring 15 is provided with a clamping groove 51, which is fixed to the outer diameter of the rear end of the hinged body 11 by the clamp 31. Another sealing ring 15 is fixed to the outer diameter of the thrust ring 17 by the clamp 31. The inner side of the sealing ring 15 is provided with a circumferential protrusion, and the rear end of the hinged body 11 and the thrust ring 17 are provided with a matching groove. By matching and installing, the axial movement of the sealing ring 15 is prevented. The outer diameter of the sealing ring 15 is also provided with a circumferential groove 52 at one end, which is used to install a circumferential spring 32. The circumferential spring 32 applies a clamping force, so that the one end of the sealing ring 15 is tightly attached to the outer diameter of the flange face of the bearing 12, and prevents external contaminants from entering. The sealing ring 15 can be opened and expanded, which is convenient for installation or disassembly. A concave-convex engagement groove 53 is provided at the port joint, which is convenient for connection and installation. The inner side of the sealing ring 15 is also provided with a semicircular groove, which is sleeved outside the O-ring 33.

[0041] The application also discloses a hinged self-unloading vehicle, which is provided with the above-mentioned hinged device sealing structure.

[0042] In conclusion, the sealing structure of the hinge device is a more reliable solution, which has low requirements for installation size precision such as aperture, coaxiality and roughness, is simple and convenient to install and has low cost. The sealing structure can adapt to harsh working conditions, has small influence of installation size error on sealing performance, good and stable sealing performance and long service life.

[0043] In the description provided herein, a large number of specific details are explained. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of the present description.

[0044] In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features of different embodiments are also meant to be within the protection scope of the present application and form different embodiments. For example, in the above embodiments, those skilled in the art can use in a combined manner according to the known technical solutions and the technical problems to be solved by the present application.

[0045] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application, and any skilled person in the art can make some changes or modifications to the above-mentioned technical content as equivalent embodiments without departing from the scope of the technical solutions of the present application. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A seal structure for a hinged device, characterized by, It comprises: a hinged body; a pipe shaft extending from the hinged body; a bearing installed in the seat cylinder of the rear trailer of the walking machine, with a bearing at the front end and the rear end of the seat cylinder, and the pipe shaft inserted through the two bearings, with the pipe shaft and the bearings capable of relative rotation; a thrust ring connected to the end of the pipe shaft in the seat cylinder and capable of relative rotation with the bearing in the seat cylinder; two O-rings respectively installed in the grooves formed by the end faces of the hinged body and the bearing and the end faces of the thrust ring and the bearing; two sealing rings, each of which is sleeved outside the two O-rings, with one end of one of the sealing rings fixed on the hinged body and the other end tightly attached to the outer diameter of the end face of the bearing and capable of relative rotation with the bearing, and with one end of the other sealing ring fixed on the outer diameter of the thrust ring and the other end tightly attached to the outer diameter of the end face of the bearing and capable of relative rotation with the bearing; the end of the bearing is provided with a flange surface for use as a thrust surface, and the bearing at the hinged body is tightly attached to the rear end face of the hinged body to form a first thrust surface, and the bearing at the thrust ring is tightly attached to the end face of the thrust ring to form a second thrust surface; a circumferential chamfer is provided at the outer end of the flange of the end of the bearing, the rear end face of the hinged body and the end face of the thrust ring, and a circumferential V-shaped groove is formed at the first thrust surface and the second thrust surface for installing the O-rings; the outer circumferential surface of the sealing ring is provided with a clamping groove, and one of the sealing rings is fixed on the outer diameter of the rear end of the hinged body by a clamping ring, and the other sealing ring is fixed on the outer diameter of the thrust ring by a clamping ring; a circumferential groove is provided on the outer circumferential surface of the sealing ring for installing a circumferential spring, and the end of the sealing ring is tightly attached to the outer diameter of the flange of the bearing by the clamping force of the spring; the thrust ring and the pipe shaft are connected by screwing the inner thread of the thrust ring and the outer thread at the end of the pipe shaft, and the thrust ring is tightly attached to the flange surface of the bearing by screwing to clamp the hinged device on the rear trailer; the inner circumferential surface of the sealing ring is provided with a circumferential protrusion, and the rear end of the hinged body and the thrust ring are provided with matching grooves, which are matched and installed to prevent the axial movement of the sealing ring.

2. The sealing structure of the hinged device according to claim 1, characterized in that: the end of the pipe shaft is directly provided with an outer thread on the outer diameter of the pipe shaft, or a shaft seat with an outer thread is assembled at the end of the pipe shaft.

3. The sealing structure of the hinged device according to claim 1, characterized in that: a notch is provided in the sealing ring to facilitate the installation and removal of the sealing ring.

4. The sealing structure of the hinged device according to claim 3, characterized in that: a concave-convex engagement groove is provided at the joint of the notch to facilitate connection and installation.

5. The sealing structure of the hinged device according to claim 1, characterized in that: a semicircular groove is provided on the inner circumferential surface of the sealing ring to be sleeved outside the O-ring.

6. A hinged self-unloading truck, characterized in that: the sealing structure of the hinged device according to any one of claims 1 to 5 is installed.

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