Hinge structure of wheel type concentrated transportation machine

Abstract

The utility model discloses a hinge structure of a wheel type concentrated transportation machine, which comprises an upper hinge point structure and a lower hinge point structure which are connected with a front frame and a rear frame, each hinge point structure is provided with a hinge plate and lug plates arranged on the upper side and the lower side of the hinge plate, and an upper pin shaft penetrates through the position between the lug plate arranged on the rear frame and the hinge plate of the front frame. The two ends of the upper pin shaft are fixed to the first positioning piece through first conical sleeve pieces, and the middle section of the upper pin shaft is sleeved with a pair of upper bearings which are spaced through spacer bushes and located in hinge plate seat holes of the front frame. A lower pin shaft penetrates between the lug plate of the front frame and the hinged plate of the rear frame, the two ends of the lower pin shaft are fixed through a second conical sleeve piece and a second positioning piece, the middle section of the lower pin shaft is in clearance fit with a lower bearing located in a hinged plate seat hole of the rear frame, and bearing covers are arranged on the hinged plate of the front frame and the hinged plate of the rear frame. The front frame and the rear frame are connected through the upper set of hinge points and the lower set of hinge points, abrasion of the contact faces of the hinge holes of the lug plates and the pin shafts is avoided through the conical sleeves, and therefore the service life of the hinge mechanism is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of wheeled walking machinery and forestry machinery, and particularly relates to an articulated structure for a wheeled transport machine. Background Technology

[0002] Currently, most forestry machinery uses articulated joints to connect the front and rear frames, allowing the vehicle to steer by rotating around the hinge point. Compared to a solid frame, an articulated frame has the advantage of a smaller turning radius, and therefore enjoys widespread use in the forestry machinery field.

[0003] The existing forestry articulated frame frame hinge connection mainly uses two sets of tapered roller bearings or radial spherical plain bearings for connection. The bearing arrangement is poor and the load-bearing capacity is limited. In addition, due to the high frequency of reciprocating operation, the many slope operations, and the heavy working load, problems such as severe wear of the frame hinge holes, uneven wear of the frame intermediate hinge pin, and bearing breakage will occur within the service life under heavy load conditions. Figure 5 If the intermediate articulation of the chassis is damaged, the overall stability of the machine will be poor, and there is a risk of separation between the front and rear chassis, resulting in problems such as driver safety and lack of safety for on-site facilities. Therefore, it is necessary to invent a new combination method for the intermediate articulated loader chassis and bearings to improve the service life of the overall chassis, operational safety, and reduce the overall operating cost of the machine. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a hinge mechanism for a wheeled transport vehicle. The front and rear frames are connected through two sets of hinge points, and a tapered sleeve is used to prevent wear on the contact surface between the hinge hole of the ear plate and the pin shaft, thereby improving the service life of the hinge mechanism.

[0005] The technical solution provided by this utility model is as follows:

[0006] This utility model provides an articulated structure for a wheeled transport vehicle, including an upper hinge point structure and a lower hinge point structure connecting the front frame and the rear frame. Each hinge point structure is provided with a hinge plate and ear plates arranged on the upper and lower sides of the hinge plate. An upper pin shaft passes through between the ear plate of the rear frame and the hinge plate of the front frame. The two ends of the upper pin shaft are fixed to a first positioning member by a first conical fitting. A pair of upper bearings are sleeved in the middle section and are separated by a spacer and located in the hinge plate seat hole of the front frame. A lower pin shaft passes through between the ear plate of the front frame and the hinge plate of the rear frame. The two ends of the lower pin shaft are fixed by a second conical fitting and a second positioning member. A lower bearing is fitted in the middle section and is located in the hinge plate seat hole of the rear frame. Bearing caps are provided on the hinge plates of both the front frame and the rear frame.

[0007] Furthermore, the upper pin includes a cylindrical section located in the upper bearing and an upper conical section and a lower conical section located at both ends. The maximum bottom diameter of the lower conical section is greater than the bottom diameter of the cylindrical section. The first conical assembly includes a conical sleeve fitted onto the upper and lower conical sections, the outer wall of which is cylindrical and the inner wall of which is conical. The conical sleeve is disposed in the hole of the ear plate of the rear frame.

[0008] Furthermore, the first positioning component includes an upper pressure cover and a lower pressure cover pressed on the outer end of the conical sleeve. The upper pressure cover and the lower pressure cover are respectively positioned on the ear plate of the rear frame by fixing bolts and bolts. An anti-slip pad is also provided between the pressure cover and the fixing bolts.

[0009] Furthermore, it also includes a dustproof structure, which includes a first reinforcing ring that engages with the bearing cover on the hinge plate of the front frame in a stepped manner and a second reinforcing ring that abuts against the lower conical column section. Both the first and second reinforcing rings have grooves for installing dustproof rings.

[0010] Furthermore, the lower pin includes a cylindrical section located in the lower bearing and an upper conical section and a lower conical section located at both ends. The upper conical section also extends a connecting section with a bottom diameter smaller than that of the cylindrical section. The second conical kit includes a conical sleeve fitted onto the upper and lower conical sections, the outer wall of which is cylindrical and the inner wall of which is conical. The conical sleeve is disposed in the hole of the ear plate of the front frame.

[0011] Furthermore, the second positioning component includes a round nut and a pressure plate. The round nut and the connecting section are threaded together to press the tapered sleeve onto the ear plate of the front frame on the upper tapered section side. The pressure plate presses the tapered sleeve onto the ear plate of the front frame on the lower tapered section side via a bottom bolt.

[0012] Furthermore, an end cap mounted on the ear plate is provided below the pressure plate.

[0013] Furthermore, adjusting shims are provided inside the bearing covers on the hinge plates of both the front and rear frames.

[0014] Furthermore, the upper bearing is an angular contact spherical bearing, and the lower bearing is a radial spherical bearing.

[0015] Furthermore, it also includes a lubrication structure, which includes oil cups mounted on the hinge plate of the front frame and the top of the lower pin, with the two oil cups respectively connected to axial oil passages provided in the hinge plate of the front frame and the lower pin.

[0016] Beneficial effects

[0017] This invention transforms line contact into surface contact at the upper hinge point through a tapered surface fit, dispersing stress and reducing wear. The interference fit of the upper bearing and the spacer ensure concentric arrangement and improve load-bearing capacity. The lower hinge point uses a clearance fit lower bearing to provide vertical freedom and compensate for errors. Both the upper and lower hinge points are equipped with bearing caps for sealing, and the tapered sleeves self-lock to suppress movement and rotation, achieving freedom difference constraint, enhancing reliability and adaptability to working conditions, and extending service life.

[0018] This invention uses a tapered sleeve to optimize the pressure between the hinge hole of the ear plate and the pin from line contact to surface contact, distributing the force to the entire contact surface. This solves the wear problem of the hinge hole and the pin contact surface and improves the service life. The tapered sleeve eliminates the gap between the hinge hole and the pin, ensuring that the tapered sleeve, hinge hole and pin are in complete contact. During operation, the three parts have no relative movement, completely solving the problem of dynamic impact.

[0019] This invention uses an angular contact spherical bearing with a spacer to enable the mechanism to self-align while reducing bearing clearance and enhancing load-bearing capacity. It also uses a mechanical dustproof system with a dustproof ring to improve the mechanism's dustproof performance and extend its service life. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the hinge mechanism of this utility model;

[0021] Figure 2 This is a schematic diagram of the upper hinge point structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the mechanical dustproof structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the lower hinge point structure of this utility model;

[0024] Figure 5 This is a schematic diagram of an existing hinge structure.

[0025] Explanation of reference numerals in the attached drawings: 1. Fixing bolt; 2. Anti-slip pad; 3. Upper pressure cap; 4. Tapered sleeve I; 5. Rear frame; 6. Upper pin; 7. Angular contact spherical bearing; 8. Spacer; 9. Oil cup; 10. Dustproof ring; 11. Tapered sleeve II; 12. Lower pressure cap; 13. Bolt; 14. First reinforcing ring; 15. Front frame; 16. Adjusting shim; 17. Upper bearing end cap; 18. Second reinforcing ring; 19. Round nut; 20. Tapered sleeve III; 21. Lower pin; 22. Radial spherical bearing; 23. Lower bearing end cap; 24. Bottom bolt; 25. Pressure plate; 26. End cap. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be construed as limiting the scope of protection of the present invention.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Example 1

[0030] like Figure 1 As shown, this utility model provides an articulated structure for a wheeled transport machine, including an upper hinge point structure and a lower hinge point structure connecting the front frame 15 and the rear frame 5. Each hinge point structure is provided with a hinge plate and ear plates arranged on the upper and lower sides of the hinge plate. An upper pin 6 passes through between the ear plate of the rear frame 5 and the hinge plate of the front frame 15. The two ends of the upper pin 6 are fixed to the first positioning member by the first tapered fitting. A pair of upper bearings are sleeved in the middle section and are separated by spacers 8 and located in the hinge plate seat hole of the front frame 15. A lower pin 21 passes through between the ear plate of the front frame 15 and the hinge plate of the rear frame 5. The two ends of the lower pin 21 are fixed by the second tapered fitting and the second positioning member. A lower bearing 22 is fitted in the middle section and is located in the hinge plate seat hole of the rear frame 5. Bearing covers are provided on the hinge plates of the front frame 15 and the rear frame 5.

[0031] This invention utilizes an upper pin to engage with the conical surfaces of the first tapered assembly and the first positioning element at the upper hinge point, optimizing the line contact between the ear plate hinge hole and the pin to a surface contact. This effectively disperses contact stress and reduces wear on the ear plate hinge hole and the pin. A pair of upper bearings are interference-fitted with the upper pin, and a spacer is used to achieve concentric arrangement of the two bearings, ensuring self-aligning functionality while enhancing structural reliability. The lower hinge point is fixed with a lower pin to the conical surfaces of the second tapered assembly and the second positioning element. A clearance fit between the lower bearing and the pin creates a vertical degree of freedom, effectively compensating for machining and assembly errors. Both the upper and lower hinge points are equipped with bearing caps to form sealed cavities. Combined with the self-locking characteristics of the tapered assembly, these features jointly suppress axial movement and rotation, achieving single-degree-of-freedom constraint at the upper hinge point and dual-degree-of-freedom adjustment at the lower hinge point. This significantly improves the service life and adaptability of the hinge structure.

[0032] Example 2

[0033] like Figures 1-2 As shown, this utility model embodiment provides an articulated structure for a wheeled transport vehicle, including a front frame 15 and a rear frame 5. The front frame 15 and the rear frame 5 are connected by an upper hinge point structure and a lower hinge point structure. Both the upper and lower hinge point structures are provided with hinge plates and ear plates arranged on the upper and lower sides. In the upper hinge point structure, an upper pin 6 passes through the ear plate on the rear frame 5 and the hinge plate on the front frame 15. The two ends of the upper pin 6 are fixed to the first positioning member by a first tapered fitting. A pair of upper bearings separated by spacers 8 are sleeved in the middle section of the upper pin 6. Specifically, in this embodiment, angular contact joint bearings 7 are used. The pair of angular contact joint bearings 7 are located on the front frame. The hinge plate seat hole of frame 15; in the lower hinge point structure, a lower pin 21 is provided between the ear plate of the front frame 15 and the hinge plate of the rear frame 5. The two ends of the lower pin 21 are fixed by the second tapered kit and the second positioning piece. The middle section is fitted with a lower bearing. Specifically, in this embodiment, a radial spherical bearing 22 is used. The radial spherical bearing 22 is located in the hinge plate seat hole of the rear frame 5. Both the front frame 15 and the rear frame 5 are provided with bearing caps. The bearing end cap 17 is used to axially position a pair of angular contact spherical bearings 7 and spacers 8 in the seat hole of the front frame 15 hinge plate. The spacers 8 keep the two angular contact spherical bearings 7 in a concentric state, ensuring the self-aligning performance of the bearings. Figure 2 The bearing end cap 23 is used to axially position the radial spherical bearing 22 within the seat hole of the hinge plate of the rear frame 5, such as... Figure 4 The radial spherical bearing 22 and the lower pin 21 are clearance-fitted, allowing for a vertical degree of freedom at the lower hinge point between the rear frame 5 and the front frame 15, to compensate for machining and assembly errors. Figure 4 .

[0034] In this embodiment, the upper pin 6 includes a cylindrical section located in the angular contact spherical bearing 7 and an upper conical section and a lower conical section located at both ends. The maximum bottom diameter of the lower conical section is greater than the bottom diameter of the cylindrical section. The first conical kit includes a conical sleeve fitted on the upper and lower conical sections, the outer wall of which is cylindrical and the inner wall of which is conical. The conical sleeve is disposed in the hole of the ear plate of the rear frame 5.

[0035] In this embodiment, the first positioning component includes an upper pressure cover 3 and a lower pressure cover 12 pressed on the outer end of the conical sleeve. The upper pressure cover 3 and the lower pressure cover 12 are respectively pressed and positioned on the ear plate of the rear frame 5 by fixing bolts 1 and bolts 13.

[0036] Specifically, conical sleeves I4 and II11, via fixing bolts 1 and 13, and upper and lower pressure caps 3 and 12 respectively, position the two ends of the upper pin 6 onto the ear plate of the rear frame 5. An anti-slip pad 2 is also provided between the pressure cap and the fixing bolt 1. Figure 2 .

[0037] In this embodiment, a dustproof structure is also included. The dustproof structure includes a first reinforcing ring 14 that is steppedly engaged with the bearing cover on the hinge plate of the front frame 15 and a second reinforcing ring 18 that abuts against the lower cone column section. Both the first reinforcing ring 14 and the second reinforcing ring 18 have grooves for installing the dustproof ring 10.

[0038] Specifically, the first reinforcing ring 14 and the second reinforcing ring 18 provide axial positioning between the rear frame 5 and the front frame 15, such as... Figure 2 The second reinforcing ring 18 and the bearing end cover 17 form a stepped fit to create a mechanical dustproof structure, such as... Figure 3 The dustproof rings 10 are respectively installed on the first reinforcing ring 14 and the second reinforcing ring 18, forming a sealing structure with the angular contact spherical bearing 7, such as... Figure 3 .

[0039] In this embodiment, the lower pin 21 includes a cylindrical section located in the radial joint bearing 22 and an upper conical section and a lower conical section located at both ends. The upper conical section also extends a connecting section with a bottom diameter smaller than that of the cylindrical section. The second conical kit includes a conical sleeve fitted on the upper and lower conical sections, the outer wall of which is cylindrical and the inner wall of which is conical. The conical sleeve is disposed in the hole of the ear plate of the front frame 15.

[0040] In this embodiment, the second positioning component includes a round nut 19 and a pressure plate 25. The round nut 19 and the connecting section are threaded together to press the tapered sleeve onto the ear plate of the front frame 15 on the upper tapered section side. The pressure plate 25 presses the tapered sleeve onto the ear plate of the front frame 15 on the lower tapered section side through the bottom bolt 24.

[0041] Specifically, the tapered sleeve Ⅲ20 uses the round nut 19, pressure plate 25, and bottom bolt 24 to position both ends of the lower pin 21 onto the lugs of the front frame 15, as shown below. Figure 4 .

[0042] In this embodiment, an end cap 26 mounted on the ear plate is also provided below the pressure plate 25.

[0043] In this embodiment, adjusting shims 16 are provided inside the bearing covers on the hinge plates of the front frame 15 and the rear frame 5. The adjusting shims 16 are used to adjust the clearance of the angular contact spherical bearing 7 and the radial spherical bearing 22, ensuring smooth rotation of the angular contact spherical bearing 7 and the radial spherical bearing 22. Figure 2 and Figure 4 .

[0044] In this embodiment, a lubrication structure is also included, which includes oil cups 9 installed on the hinge plate of the front frame 15 and the top of the lower pin 21. The two oil cups 9 are respectively connected to axial oil passages provided in the hinge plate of the front frame 15 and the lower pin 21.

[0045] This invention consists of two hinge points, an upper hinge point (the "tight hinge point"), primarily composed of a pin, angular contact spherical bearings, a spacer, a dust seal, a reinforcing ring, and a tapered sleeve. The tapered sleeve tightly engages with the pin and the seat hole, positioning the pin and restricting its axial movement and rotation. Simultaneously, the tapered sleeve optimizes the pressure between the ear plate hinge hole and the upper pin from line contact to surface contact, distributing the force across the entire contact surface. This solves the wear problem of the hinge hole and pin contact surface, significantly improving service life. The upper hinge point uses a pair of angular contact spherical bearings with an interference fit to the upper pin, and the spacer ensures the two angular contact spherical bearings are concentric, guaranteeing self-aligning functionality. Compared to tapered roller bearings of the same specifications, this reduces clearance and significantly increases load-bearing capacity, ensuring the reliability of the mechanism. The reinforcing ring is positioned perpendicular to the rear frame and the hinge seat, leaving the upper hinge point with only one degree of rotational freedom. The upper hinge point uses a mechanical dustproof system with a dust seal and a lubrication device, improving the mechanism's dustproof performance and extending its service life. The hinge point is called the "loose hinge point". It mainly consists of a pin, a radial spherical bearing, a tapered sleeve, a round nut, and an end cap. Its structure is similar to that of the upper hinge point. The difference is that the radial spherical bearing and the pin are in clearance fit, which increases the vertical degree of freedom of the lower hinge point and compensates for machining and assembly errors.

[0046] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. An articulating structure for a wheeled straddle carrier, characterised in that, The system includes an upper hinge point structure and a lower hinge point structure connecting the front frame and the rear frame. Each hinge point structure is equipped with a hinge plate and ear plates arranged on the upper and lower sides of the hinge plate. An upper pin passes through between the ear plate of the rear frame and the hinge plate of the front frame. The two ends of the upper pin are fixed to the first positioning member by the first tapered fitting. A pair of upper bearings are sleeved in the middle section and are located in the hinge plate seat hole of the front frame, separated by a spacer. A lower pin passes through between the ear plate of the front frame and the hinge plate of the rear frame. The two ends of the lower pin are fixed by the second tapered fitting and the second positioning member. A lower bearing is fitted in the middle section with a clearance fit in the hinge plate seat hole of the rear frame. Bearing caps are provided on the hinge plates of both the front frame and the rear frame.

2. The articulated structure of the wheeled container as described in claim 1, characterized in that, The upper pin includes a cylindrical section located in the upper bearing and an upper conical section and a lower conical section located at both ends. The maximum bottom diameter of the lower conical section is greater than the bottom diameter of the cylindrical section. The first conical assembly includes a conical sleeve fitted onto the upper and lower conical sections. The outer wall of the conical sleeve is cylindrical and the inner wall is conical. The conical sleeve is set in the hole of the ear plate of the rear frame.

3. The articulated structure of a wheeled conveyor as claimed in claim 2, characterized in that, The first positioning component includes an upper pressure cover and a lower pressure cover pressed on the outer end of the tapered sleeve. The upper pressure cover and the lower pressure cover are respectively positioned on the ear plate of the rear frame by fixing bolts and bolts. An anti-slip pad is also provided between the pressure cover and the fixing bolts.

4. The articulated structure of a wheeled conveyor as claimed in claim 2, characterized in that, It also includes a dustproof structure, which includes a first reinforcing ring that engages with a bearing cover in a stepped manner on the hinge plate of the front frame and a second reinforcing ring that abuts against the lower conical column section. Both the first and second reinforcing rings have grooves for installing dustproof rings.

5. The articulated structure of a wheeled conveyor as claimed in claim 1, characterized in that, The lower pin includes a cylindrical section located in the lower bearing and an upper conical section and a lower conical section located at both ends. The upper conical section also extends a connecting section with a bottom diameter smaller than that of the cylindrical section. The second conical kit includes a conical sleeve fitted on the upper and lower conical sections, the outer wall of which is cylindrical and the inner wall of which is conical. The conical sleeve is set in the hole of the ear plate of the front frame.

6. The articulated structure of the wheeled transport machine according to claim 5, characterized in that, The second positioning component includes a round nut and a pressure plate. The round nut and the connecting section are threaded together to press the tapered sleeve onto the ear plate of the front frame on the side of the upper tapered section. The pressure plate presses the tapered sleeve onto the ear plate of the front frame on the side of the lower tapered section through a bottom bolt.

7. The articulated structure of a wheeled conveyor as claimed in claim 6, characterized in that, Below the pressure plate, there is also an end cap installed on the ear plate.

8. The articulated structure of a wheeled conveyor as claimed in claim 1, characterized in that, Adjustment shims are provided inside the bearing covers on the hinge plates of both the front and rear frames.

9. The articulated structure of a wheeled conveyor as claimed in claim 1, characterized in that, The upper bearing is an angular contact spherical bearing, and the lower bearing is a radial spherical bearing.

10. The articulated structure of a wheeled conveyor as claimed in claim 1, characterized in that, It also includes a lubrication structure, which includes oil cups mounted on the hinge plate of the front frame and the top of the lower pin, with the two oil cups respectively connected to axial oil passages provided in the hinge plate of the front frame and the lower pin.

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