Swing hinge structure assembly and engineering vehicle

Abstract

The utility model relates to the technical field of vehicle frame hinge structures, in particular to a swing hinge structure assembly and an engineering vehicle, which comprises a body, the front end of the body comprises two opposite hinge plates, the two hinge plates are provided with hinge holes, the two hinge holes are coaxially arranged, the two hinge holes are provided with corresponding hinge bearings and hinge pins, and the hinge bearings and the hinge pins are connected with the body. The hinge pin shaft is rotationally connected into the hinge hole through a hinge bearing; the middle part of the hinge pin shaft in the axial direction comprises an assembly section, and the length of the assembly section in the axial direction is equal to the assembly length required by the corresponding hinge bearing; the two ends of the assembly section are coaxially connected with the first section and the second section of the hinge pin shaft respectively, the radial size of the first section is larger than that of the assembly section, and the radial size of the second section is smaller than that of the assembly section. The hinge pin shaft is of a three-section type design, the relative position of the hinge pin shaft and the hinge bearing can be conveniently controlled, and the hinge pin shaft can quickly penetrate through the bearing inner ring to reach the preset position.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle frame hinge structures, in particular to a swing hinge structure assembly and an engineering vehicle. Background Art

[0002] An articulated mining dump truck is an engineering vehicle developed to adapt to tough road conditions such as soft ground, potholes, and mud. The vehicle has a split frame consisting of two frames, front and rear. The front frame is equipped with a power traction unit, and the rear frame is equipped with a cargo unit. A swing hinge structure is provided between the front and rear frames for connection. Since the vehicle mainly travels on bad roads with potholes and bumps, the frame shakes greatly. The function of the swing hinge structure is, on the one hand, to enable the front frame to drag the rear frame and reduce the turning radius of the vehicle; on the other hand, it enables the front and rear frames to rotate a certain angle around a certain hinge point, thereby reducing the distortion caused by the shaking of the frame and reducing the chance of frame damage. In addition, when traveling on uneven roads, it can ensure that all wheels are in contact with the ground to maintain overall stability, passability and maximum productivity.

[0003] The patent document with announcement number CN218616862U discloses an articulated structure and an engineering vehicle, wherein the articulated structure includes a support plate, a front articulated plate and a rear articulated sleeve, a mounting block is provided on the support plate, a first articulated hole for articulating with a drive cylinder is provided on the mounting block, the front articulated plate is welded to one side of the support plate, a second articulated hole is provided on the front articulated plate in a vertical direction, the front frame is articulated with the second articulated hole through a first articulated member, the rear articulated sleeve is welded to the side of the support plate facing away from the front articulated plate in a horizontal direction, a third articulated hole is correspondingly provided on the rear frame, and the rear articulated sleeve is articulated with the rear frame through the third articulated hole.

[0004] However, the swing articulated structure assembly of the vehicle is complex, and the installation of the articulated parts and bearings in the articulated holes is difficult. The articulated parts are difficult to reach the preset position, which places high technical requirements on the operators, and the bearings are prone to uneven rotation. There are great risks to the reliability of the bearings and the installability of the vehicle, and the installation efficiency is low. Utility Model Content

[0005] In order to solve the technical problems in the prior art that it is difficult to install the hinge and the bearing in the swing hinge structure between the front frame and the rear frame, and the hinge is difficult to reach the preset position, the utility model provides a swing hinge structure assembly and an engineering vehicle.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by a swing hinge structure assembly in the utility model is:

[0007] A swing hinge structure assembly includes a body, the front end of the body includes two opposite hinge plates, the two hinge plates are provided with hinge holes, the two hinge holes are coaxially arranged, the rear end of the body includes a swing shaft, the two hinge holes are equipped with corresponding hinge bearings and hinge pins, the hinge pins are rotatably connected to the hinge holes through the hinge bearings; the hinge pin includes an assembly section in the middle of the axial direction, the length of the assembly section in the axial direction is equal to the assembly length required by the corresponding hinge bearing; the two ends of the assembly section are coaxially connected to the first section and the second section of the hinge pin respectively, the radial dimension of the first section is larger than the radial dimension of the assembly section, and the radial dimension of the second section is smaller than the radial dimension of the assembly section.

[0008] Adopting the above-mentioned structural scheme, the articulated pin in the present application adopts a three-section design, and the length of the assembly section in the axial direction is equal to the assembly length required by the corresponding articulated bearing, which is convenient for controlling the relative position of the articulated pin and the articulated bearing, and convenient for assembling the articulated pin and the articulated bearing into place, and the second section of the articulated pin can quickly pass through the inner ring of the bearing and quickly reach the preset position, which is convenient for assembly and helps to improve assembly efficiency.

[0009] As a preferred implementation of a swing hinge structure assembly, the inner diameter of one end of the hinge hole is equal to the outer diameter of the first section of the corresponding hinge pin, and the inner diameter of the other end is equal to the outer diameter of the second section of the corresponding hinge pin, so that the hinge pin and the hinge hole can be coaxially installed.

[0010] As a preferred implementation of a swing hinge structure assembly, the inner diameters of both ends of the hinge hole are equal to the outer diameters of the first section of the corresponding hinge pin, and a gasket is fixedly provided at one end of the hinge hole corresponding to the second section of the hinge pin, and the inner diameter of the gasket is equal to the outer diameter of the second section of the hinge pin, so as to facilitate the coaxial installation of the hinge pin and the hinge hole.

[0011] As a preferred implementation mode of a swing hinge structure assembly, the body is cast in one piece. The body is cast in one piece, which reduces the use of welds or bolted connectors, makes the structure simpler, and improves the overall strength.

[0012] As a preferred implementation method of a swing hinge structure assembly, the corresponding hinge bearing in each hinge hole is a double-row tapered roller bearing or a pair of tapered roller bearings, and a spacer sleeve is provided between the pair of tapered roller bearings. In the present application, the hinge bearing adopts a pair of tapered roller bearings or a double-row tapered roller bearing, which can reduce the use of gaskets, reduce repeated measurements during assembly, and reduce the difficulty of assembly. If a pair of tapered roller bearings are used, then the pair of tapered roller bearings are installed back to back and a spacer sleeve is provided between the pair of tapered roller bearings. The machining tolerance of the spacer sleeve is obtained by theoretical calculation. By controlling the tolerance of the spacer sleeve, the optimal clearance used by the hinge bearing can be controlled, which can reduce repeated measurements during assembly, reduce the difficulty of assembly, and is less likely to fail after installation, thereby improving reliability.

[0013] As a preferred implementation of a swing hinge structure assembly, the outer circumference of the swing shaft near the hinge plate is equipped with a front bearing, and the outer circumference of the swing shaft away from the hinge plate is equipped with a rear bearing, so as to facilitate hinged installation with the mounting tube of the rear frame.

[0014] As a preferred implementation of a swing hinge structure assembly, the front bearing and the rear bearing are both tapered roller bearings.

[0015] As a preferred implementation of a swing hinge structure assembly, a bearing cover plate is installed at the end of the swing shaft away from the hinge plate, and the bearing cover plate is installed on the swing shaft through a locking nut and a locking bolt. The bearing cover plate in the present application is not easy to loosen and has high reliability. At the same time, it reduces excessive drilling on the body and improves the overall strength of the body.

[0016] As a preferred implementation method of the swing hinge structure assembly, a circle of foam plastic is wrapped around the outer circumference of the swing shaft. Too much filling of lubricating grease is not conducive to the formation of oil film on the front bearing and the rear bearing, which will reduce the service life of the front bearing and the rear bearing. At the same time, too much filling will waste grease and increase manufacturing costs. Therefore, wrapping foam sponge around the outer circumference of the swing shaft can reduce the filling of grease and increase the service life and reliability of the front bearing and the rear bearing.

[0017] A technical solution adopted by an engineering vehicle in this application is:

[0018] An engineering vehicle comprises a front frame and a rear frame, wherein the front frame and the rear frame are connected via the swing hinge structure assembly described above.

[0019] The beneficial effects of the utility model include:

[0020] 1. The articulated pin in the present application adopts a three-section design, and the length of the assembly section in the axial direction is equal to the assembly length required by the corresponding articulated bearing, which is convenient for controlling the relative position of the articulated pin and the articulated bearing, and for assembling the articulated pin and the articulated bearing in place, and the second section of the articulated pin can quickly pass through the inner ring of the bearing, which is beneficial to improving assembly efficiency.

[0021] 2. The articulated bearing in this application uses a pair of tapered roller bearings or a double-row tapered roller bearing, which can reduce the use of gaskets, reduce repeated measurements during assembly, and reduce the difficulty of assembly. If a pair of tapered roller bearings are used, then the pair of tapered roller bearings are installed back to back and a spacer is provided between the pair of tapered roller bearings. The machining tolerance of the spacer is obtained through theoretical calculation. By controlling the tolerance of the spacer, the optimal clearance used by the articulated bearing can be controlled, which can reduce repeated measurements during assembly, reduce the difficulty of assembly, and is less likely to cause failures after installation, thereby improving reliability.

[0022] 3. The main body in this application adopts an integral casting type, which reduces the use of welds or bolt connectors, makes the structure simpler, and improves the overall strength.

[0023] 4. The bearing cover plate in this application is not easy to loosen and has high reliability.

[0024] 5. In the present application, excessive filling of lubricating grease is not conducive to the formation of oil film on the front bearing and the rear bearing, which will reduce the service life of the front bearing and the rear bearing. At the same time, excessive filling will waste grease and increase manufacturing costs. Therefore, wrapping foam sponge on the outer circumference of the swing shaft can reduce the filling of grease and improve the service life and reliability of the front bearing and the rear bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of a half-section structure of a swing hinge structure assembly in a specific implementation mode of the utility model;

[0027] Figure 2 It is a structural schematic diagram of the main body in a specific implementation mode of the utility model;

[0028] Figure 3 It is a structural schematic diagram of the hinged shaft in a specific implementation mode of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the upper hinge pin in a specific implementation manner of the utility model;

[0030] Figure 5 It is a schematic diagram of the structure of the lower hinge pin in a specific implementation manner of the utility model.

[0031] List of parts and reference numerals:

[0032] 1. Main body; 11. Articulated plate; 12. Swing shaft; 13. Articulated hole; 2. Articulated bearing; 21. Spacer; 3. Articulated pin; 31. First section; 32. Assembly section; 33. Second section; 4. Front bearing; 5. Rear bearing; 6. Mounting cylinder; 7. Bearing cover plate; 8. Front frame; 9. Foam plastic. DETAILED DESCRIPTION

[0033] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the utility model will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] Embodiment 1:

[0035] Reference Figure 1-5 The present embodiment provides a swing hinge structure assembly, including a body 1, the body 1 is integrally cast, the front end of the body 1 includes two opposite hinge plates 11, the two hinge plates 11 are provided with hinge holes 13, the two hinge holes 13 are coaxially arranged, the two hinge holes 13 are equipped with corresponding hinge bearings 2 and hinge pins 3, the hinge pins 3 are divided into an upper hinge pin 3 and a lower hinge pin 3, refer to Figure 1 , the upper hinge pin 3 is located at the top, and the lower hinge pin 3 is located at the bottom. The corresponding hinge bearing 2 in each hinge hole 13 is a pair of tapered roller bearings, and a spacer 21 is arranged between the pair of tapered roller bearings. The hinge pin 3 is rotatably connected to the hinge hole 13 through the hinge bearing 2, and the front frame 8 of the vehicle is connected to the swing hinge structure through two hinge pins 3; the hinge pin 3 includes an assembly section 32 in the middle of the axial direction, and the hinge bearing 2 is assembled on the assembly section 32, and the length of the assembly section 32 in the axial direction is equal to the assembly length required by the corresponding hinge bearing 2; the two ends of the assembly section 32 are coaxially connected with the first section 31 and the second section 33 of the hinge pin 3 respectively, and the radial dimension of the first section 31 is larger than the radial dimension of the assembly section 32, and the radial dimension of the second section 33 is smaller than the radial dimension of the assembly section 32. The inner diameter of one end of the hinge hole 13 is equal to the outer diameter of the first section 31 of the corresponding hinge pin 3, and the inner diameter of the other end is equal to the outer diameter of the second section 33 of the corresponding hinge pin 3.

[0036] The rear end of the body 1 includes a swing shaft 12, which is hingedly installed in the mounting tube 6 of the rear frame. The outer peripheral surface of the swing shaft 12 close to the hinge plate 11 is equipped with a front bearing 4, and the outer peripheral surface of the swing shaft 12 away from the hinge plate 11 is equipped with a rear bearing 5. The front bearing 4 and the rear bearing 5 are both tapered roller bearings, and the front bearing 4 and the rear bearing 5 are both installed in the mounting tube 6. The swing shaft 12 is wrapped with a circle of foam plastic 9 on the outer peripheral surface between the front bearing 4 and the rear bearing 5. The end of the swing shaft 12 away from the hinge plate 11 is equipped with a bearing cover plate 7, and the bearing cover plate 7 is installed on the swing shaft 12 through a locking nut and a locking bolt.

[0037] The articulated pin 3 in this embodiment adopts a three-section design, and the length of the assembly section 32 in the axial direction is equal to the assembly length required by the corresponding articulated bearing 2, which is convenient for controlling the relative positions of the articulated pin 3 and the articulated bearing 2, and for assembling the articulated pin 3 and the articulated bearing 2 in place, and the second section 33 of the articulated pin 3 can quickly pass through the inner ring of the bearing, which is beneficial to improving the assembly efficiency.

[0038] In this embodiment, the articulated bearing 2 adopts a pair of tapered roller bearings. The pair of tapered roller bearings are installed back to back and a spacer sleeve 21 is provided between the pair of tapered roller bearings to reduce the use of gaskets. The processing tolerance of the spacer sleeve 21 is obtained through theoretical calculation. By controlling the tolerance of the spacer sleeve 21, the optimal clearance used by the articulated bearing 2 can be controlled, which reduces repeated measurements during assembly, reduces the difficulty of assembly, is less likely to cause failures after installation, and improves reliability.

[0039] The body 1 is integrally cast, which reduces the use of welds or bolted connectors, makes the structure simpler, and improves the overall strength.

[0040] The bearing cover plate 7 in this embodiment is not easy to loosen and has high reliability.

[0041] In this embodiment, the articulated bearing 2 is installed in the articulated hole 13 by means of a locking bolt and a locking nut. The locking bolt is inserted into the articulated hole 13 from the side of the articulated plate 11. After the locking nut is pressed against the outer ring of the articulated bearing 2, the locking nut is fixed with the locking bolt, so that the articulated bearing 2 is fixedly installed in the articulated hole 13, thereby preventing the locking nut from loosening during the use of the vehicle, resulting in excessive clearance and damage to the articulated bearing 2. The locking nut and the locking bolt are standard parts.

[0042] In this embodiment, when installing the two articulation pins 3, the articulation pins 3 are first frozen at -80°C. Since the articulated part is connected to the front frame 8 through the two articulation pins 3, the coaxiality requirements of the two articulation pins 3 and the corresponding articulation holes 13 during assembly are relatively strict, and the assembly is difficult. The top diameters of the two articulation pins 3 are designed to be the smallest to ensure that the articulation pins 3 can smoothly pass through the articulation bearing 2. When the articulation pins 3 are coaxial with the articulation bearing 2, tooling tools are used to press the articulation pins 3 and the articulation bearing 2 to the designed position. This can effectively avoid damage to the bearings due to misalignment during assembly, reduce assembly difficulties, and prevent failures after installation.

[0043] In this embodiment, excessive filling of lubricating grease is not conducive to the formation of oil film on the front bearing 4 and the rear bearing 5, which will reduce the service life of the front bearing 4 and the rear bearing 5. At the same time, excessive filling will waste grease and increase manufacturing costs. Therefore, wrapping foam sponge on the outer peripheral surface of the swing shaft 12 can reduce the filling of grease and improve the service life and reliability of the front bearing 4 and the rear bearing 5.

[0044] In this embodiment, the connection method between the front frame 8 and the two hinge pins 3 belongs to the prior art.

[0045] In other embodiments, the corresponding hinge bearing 2 in each hinge hole 13 may also be a double-row tapered roller bearing.

[0046] In other embodiments, the inner diameters of both ends of the hinge hole 13 may also be equal to the outer diameter of the corresponding first section 31 of the hinge pin 3, and a gasket is fixedly provided at one end of the hinge hole 13 corresponding to the second section 33 of the hinge pin 3, and the inner diameter of the gasket is equal to the outer diameter of the second section 33 of the hinge pin 3.

[0047] Embodiment 2:

[0048] This embodiment provides an engineering vehicle, including a front frame 8 and a rear frame, and the front frame 8 and the rear frame are connected by the swing hinge structure assembly in Embodiment 1.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A swing hinge structure assembly, comprising a body (1), the front end of the body (1) comprising two opposite hinge plates (11), the two hinge plates (11) both having hinge holes (13), the two hinge holes (13) being coaxially arranged, the rear end of the body (1) comprising a swing shaft (12), characterized in that: The two hinge holes (13) are each equipped with a corresponding hinge bearing (2) and a hinge pin (3), and the hinge pin (3) is rotatably connected to the hinge hole (13) via the hinge bearing (2); the hinge pin (3) includes an assembly section (32) in the middle of the axial direction, and the length of the assembly section (32) in the axial direction is equal to the assembly length required by the corresponding hinge bearing (2); the two ends of the assembly section (32) are coaxially connected to the first section (31) and the second section (33) of the hinge pin (3), respectively, the radial dimension of the first section (31) is larger than the radial dimension of the assembly section (32), and the radial dimension of the second section (33) is smaller than the radial dimension of the assembly section (32).

2. The swing hinge structure assembly according to claim 1, characterized in that: The inner diameter of one end of the hinge hole (13) is equal to the outer diameter of the first section (31) of the corresponding hinge pin (3), and the inner diameter of the other end is equal to the outer diameter of the second section (33) of the corresponding hinge pin (3).

3. The swing hinge structure assembly according to claim 1, characterized in that: The inner diameters of both ends of the hinge hole (13) are equal to the outer diameters of the first section (31) of the corresponding hinge pin (3), and a gasket is fixedly provided at one end of the hinge hole (13) corresponding to the second section (33) of the hinge pin (3), and the inner diameter of the gasket is equal to the outer diameter of the second section (33) of the hinge pin (3).

4. The swing hinge structure assembly according to claim 1, characterized in that: The main body (1) is cast in one piece.

5. The swing hinge structure assembly according to claim 1, characterized in that: The corresponding hinge bearing (2) in each hinge hole (13) is a double-row tapered roller bearing or a pair of tapered roller bearings, and a spacer sleeve (21) is provided between the pair of tapered roller bearings.

6. The swing hinge structure assembly according to claim 1, characterized in that: A front bearing (4) is mounted on the outer circumference of one end of the swing shaft (12) close to the hinge plate (11), and a rear bearing (5) is mounted on the outer circumference of one end of the swing shaft (12) away from the hinge plate (11).

7. The swing hinge structure assembly according to claim 6, characterized in that: The front bearing (4) and the rear bearing (5) are both tapered roller bearings.

8. The swing hinge structure assembly according to claim 6, characterized in that: A bearing cover plate (7) is installed at the end of the swing shaft (12) away from the hinge plate (11), and the bearing cover plate (7) is installed on the swing shaft (12) via a locking nut and a locking bolt.

9. The swing hinge structure assembly according to claim 1, characterized in that: The outer peripheral surface of the swing shaft (12) is wrapped with a circle of foam plastic (9).

10. An engineering vehicle, characterized in that: The vehicle comprises a front frame (8) and a rear frame, wherein the front frame (8) and the rear frame are connected via a swing hinge structure assembly as described in any one of claims 1 to 9.

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