Loader and frame hinging device thereof

Abstract

The utility model provides a loader and a frame hinge device thereof, the frame hinge device comprises a first connecting part, a second connecting part, a pin shaft part and at least one group of self-aligning roller bearings, the first connecting part is used for being fixed on a front frame, a mounting hole is formed in the first connecting part, the second connecting part is used for being fixed on a rear frame, and the pin shaft part is used for being fixed on the rear frame. The pin shaft part is fixed with the second connecting part, the pin shaft part rotatably penetrates through the mounting hole and is fixed with the second connecting part, the self-aligning roller bearings are arranged in the mounting hole, the inner ring of each group of self-aligning roller bearings is sleeved and fixed on the pin shaft part, and the outer ring of each group of self-aligning roller bearings is fixed on the inner wall of the mounting hole. According to the frame hinge device, the self-aligning roller bearing is adopted, so that the frame hinge device has the advantages of being small in abrasion, longer in service life, relatively low in installation requirement and the like, and can adapt to relatively rough frame connection working conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering machinery, in particular to a loader and a frame hinging device thereof. BACKGROUND

[0002] The steering of the articulated loader is achieved by a pair of oil cylinders connecting the front and rear frames to push the front and rear frames to rotate relatively around the steering hinge. Since the relative rotation angle of the front and rear frames is large, the turning radius of the articulated vehicle is small, the maneuverability is flexible, and the productivity is high. The performance of the steering hinge will directly affect the flexibility and reliability of the loader steering, and the bearing in the steering hinge is a key component.

[0003] In the related art, the bearing in the steering hinge adopts a joint bearing or a tapered roller bearing, but the friction coefficient of the joint bearing is large, the structure of the tapered roller bearing is complex, and the machining precision of the seat hole is required to be high, so it is necessary to further improve the bearing. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a loader and a frame hinging device thereof, which adopts a self-aligning roller bearing and has the advantages of small wear, longer service life, and relatively low installation requirements, and can adapt to relatively rough frame connection working conditions.

[0005] In order to achieve the above-mentioned purpose, the following technical solutions are adopted in the present application:

[0006] In a first aspect, the present application provides a frame hinging device for hinging a front frame and a rear frame, which comprises: a first connecting part for fixing to the front frame, and the first connecting part is formed with a mounting hole; a second connecting part for fixing to the rear frame; a pin shaft part fixed with the second connecting part, the pin shaft part being rotatably arranged in the mounting hole and being fixed with the second connecting part; at least one set of self-aligning roller bearings, the self-aligning roller bearings being arranged in the mounting hole, and the inner ring of each set of self-aligning roller bearings being sleeved and fixed to the pin shaft part, and the outer ring of each set of self-aligning roller bearings being fixed to the inner wall of the mounting hole.

[0007] As an optional implementation, the self-aligning roller bearings are arranged in two sets, and the two sets of self-aligning roller bearings are arranged in an axial direction of the pin shaft part; and the frame hinging device further comprises: a spacer sleeve arranged in the mounting hole and located between the two sets of self-aligning roller bearings to separate the two sets of self-aligning roller bearings.

[0008] As an optional implementation, the second connecting part comprises an upper connecting plate and a lower connecting plate, the upper connecting plate and the lower connecting plate are arranged in a spaced manner; the pin shaft part is arranged in the upper connecting plate and the lower connecting plate; and the first connecting part is located between the upper connecting plate and the lower connecting plate.

[0009] As an optional implementation, the frame hinging device further comprises a bearing cover, the bearing cover covers the opening of the mounting hole on the side close to the upper connecting plate, and is used for covering the mounting hole; and a first sealing part, the first sealing part is arranged on the inner side of the bearing cover facing the mounting hole, and is used for sealing the mounting hole.

[0010] As an optional implementation, a first through hole is arranged on the bearing cover and is used for allowing the pin shaft part to pass through, and when the pin shaft part passes through the first through hole, the pin shaft part and the first through hole have a first gap; the frame hinging device further comprises a positioning sleeve, the positioning sleeve is sleeved on the pin shaft part and passes through the first gap, so that the first end of the positioning sleeve abuts against the inner ring of the self-aligning roller bearing close to the upper connecting plate, and the second end abuts against the upper connecting plate.

[0011] As an optional implementation, the lower connecting plate is provided with a second through hole for allowing the pin shaft part to pass through; the frame hinging device further comprises a fixing disc, the fixing disc is fixed to the side of the lower connecting plate away from the upper connecting plate, and the pin shaft part passes through the second through hole and abuts against and is fixed to the fixing disc.

[0012] As an optional implementation, when the pin shaft part passes through the second through hole, the pin shaft part and the second through hole have a second gap; the frame hinging device further comprises a pressing sleeve, the pressing sleeve is sleeved on the pin shaft part and passes through the second gap and the mounting hole, so that the first end of the pressing sleeve abuts against the inner ring of the self-aligning roller bearing close to the lower connecting plate, and the second end abuts against the fixing disc.

[0013] As an optional implementation, the first connecting part is provided with a sealing hole on the side close to the lower connecting plate, the sealing hole is connected with the mounting hole, the pressing sleeve passes through the second gap, the sealing hole and the mounting hole and abuts against the inner ring of the self-aligning roller bearing; the frame hinging device further comprises a second sealing part, the second sealing part is arranged in the sealing hole and is used for sealing the gap between the inner wall of the sealing hole and the pressing sleeve.

[0014] As an optional implementation, the frame hinging device further comprises a sealing gasket, the sealing gasket is arranged between the fixing disc and the lower connecting plate and is used for sealing the gap between the fixing disc and the lower connecting plate.

[0015] In a second aspect, the application further provides a loader, which comprises the frame hinging device according to any one of the above.

[0016] The frame hinge device of the application has the following advantages: the first connecting part is fixed to the front frame, the second connecting part is fixed to the rear frame, the first connecting part is formed with a mounting hole, the pin shaft part is rotatably arranged in the mounting hole, the pin shaft part is fixed to the second connecting part, at least one set of bearings is arranged between the front frame, the pin shaft part and the rotating hole of the first connecting part, the bearings are self-aligning roller bearings, compared with the joint bearing scheme, the self-aligning roller bearings have smaller friction coefficient, smaller wear and longer service life, compared with the conical roller bearing scheme, the self-aligning roller bearings have relatively low installation requirements and can adapt to relatively rough frame connection working conditions.

[0017] Further, the frame hinge device of the application has the following advantages: the mounting hole is formed in the first connecting part, the pin shaft part is rotatably arranged in the mounting hole, and the self-aligning roller bearings are arranged in the mounting hole, so that the first connecting part can bear part of the function of the bearing seat, thereby simplifying the structure of the bearing seat, reducing the number of parts and shortening the size of the bolts used to fasten the bearing seat. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0019] Figure 1 It is a top view of the frame hinge device in an embodiment of the application;

[0020] Figure 2 It is a schematic sectional view taken along the section line A-A in Figure 1

[0021] Figure 3 It is a schematic structural view of the loader in an embodiment of the application.

[0022] EXPLANATION OF REFERENCE NUMERALS:

[0023] 10, front frame; 20, rear frame; 100, first connecting part; 110, mounting hole; 120, sealing hole; 130, second sealing part; 140, oil injection channel; 150, grease nipple; 200, second connecting part; 210, upper connecting plate; 220, lower connecting plate; 222, second through hole; 224, second gap; 300, pin shaft part; 310, positioning pin; 400, self-aligning roller bearing; 500, spacer sleeve; 600, bearing cover; 610, first sealing part; 612, first through hole; 614, first gap; 700, positioning sleeve; 800, fixed disc; 810, sealing washer; 840, gasket; 900, compression sleeve.​ DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0025] The steering of the articulated loader is achieved by a pair of oil cylinders connected to the front and rear frames to push the front and rear frames to rotate relatively around the steering hinge. Since the relative rotation angle of the front and rear frames is large, the turning radius of the articulated vehicle is small, the maneuverability is flexible, and the productivity is high. The performance of the steering hinge will directly affect the flexibility and reliability of the loader steering, and the bearing in the steering hinge is a key component.

[0026] In the related art, the bearing in the steering hinge adopts a joint bearing or a tapered roller bearing, but the friction coefficient of the joint bearing is large, the structure of the tapered roller bearing is complex, and the machining precision requirement of the seat hole is high, so it is necessary to further improve the bearing.

[0027] In order to overcome the defects in the prior art, the present application provides a frame hinge device, in which the first connecting part is fixed to the front frame, the second connecting part is fixed to the rear frame, the first connecting part is formed with a mounting hole, the pin shaft part is rotatably provided in the mounting hole, and the pin shaft part is fixed to the second connecting part. Thus, at least one set of bearings is arranged between the front frame, the pin shaft part and the rotating hole of the first connecting part, and the bearing adopts a self-aligning roller bearing. Compared with the joint bearing scheme, the self-aligning roller bearing of the present embodiment has the advantages of smaller friction coefficient, less wear and longer service life. Compared with the tapered roller bearing scheme, the self-aligning roller bearing of the present embodiment has relatively low installation requirements and can adapt to relatively rough frame connection working conditions.

[0028] The following will be combined with Figure 1 and Figure 2 to describe the content of the present application in detail, so that those skilled in the art can more clearly and specifically understand the content of the present application.

[0029] The present application provides a frame hinge device for hinge connecting a front frame 10 and a rear frame 20. The frame hinge device can include a first connecting part 100, a second connecting part 200, a pin shaft part 300 and at least one set of self-aligning roller bearings 400.

[0030] The first connecting part 100 is used for fixing to the front frame 10, and the first connecting part 100 is formed with a mounting hole 110. The second connecting part 200 is used for fixing to the rear frame 20. The pin shaft part 300 is fixed with the second connecting part 200, the pin shaft part 300 is rotatably arranged in the mounting hole 110, and the pin shaft part 300 is fixed with the second connecting part 200. The self-aligning roller bearing 400 is arranged in the mounting hole 110, and the inner ring of each set of self-aligning roller bearings 400 is sleeved and fixed on the outer wall of the pin shaft part 300, and the outer ring of each set of self-aligning roller bearings 400 is fixed on the inner wall of the mounting hole 110.

[0031] In the embodiment, the first connecting part 100 can be integrally formed on or fixed on the front frame 10 by a fastener. The second connecting part 200 can be integrally formed on or fixed on the rear frame 20 by a fastener.

[0032] The first connecting part 100 is formed with a mounting hole 110, the pin shaft part 300 is rotatably arranged in the mounting hole 110, and the pin shaft part 300 is fixed with the second connecting part 200, so that when the front frame 10 and the rear frame 20 are found to rotate relative to each other, the pin shaft part 300 can rotate relative to the first connecting part 100.

[0033] At least one set of bearings is arranged between the pin shaft part 300 and the rotating hole of the first connecting part 100 to realize the rotary support of the pin shaft part 300. Specifically, the inner ring of the bearing is sleeved and fixed on the outer wall of the pin shaft part 300, and the outer ring of the bearing is fixed on the inner wall of the rotating hole, so that when the pin shaft part 300 rotates relative to the first connecting part 100, the inner ring and the outer ring of the bearing rotate relative to each other, realizing the rotary support of the pin shaft part 300 and the first connecting part 100.

[0034] In the embodiment, the bearing adopts the self-aligning roller bearing 400. The self-aligning roller bearing 400 has double-row rollers, the outer ring has one shared spherical roller way, and the inner ring has two ways and is inclined at an angle relative to the bearing axis. This structure makes it have the automatic self-aligning performance, so it is not easy to be affected by the angle error of the shaft and the bearing box seat or the shaft bending, and is suitable for the occasion where the installation error or the shaft bending causes the angle error. The bearing can not only bear the radial load, but also bear the bidirectional axial load.

[0035] In the engineering machinery (for example, the articulated loader), the front frame 10 and the rear frame 20 inevitably have a large relative rotation angle, the working road surface is uneven, and the load randomness is large, so the use of the self-aligning roller bearing 400 not only can effectively and timely bear the load from the radial direction and the bidirectional axial direction, but also can realize the automatic self-alignment, overcome the influence of the harsh work on the bearing, and better adapt to the working conditions of the loader.

[0036] In addition, for the scheme of adopting the joint bearing, since the joint bearing belongs to the non-liquid sliding bearing, the friction coefficient is large, the friction coefficient in the stable wear stage can reach between 0.05 to 0.1, the resistance torque is large when the inner and outer rings of the bearing rotate, in addition, the lubricating grease is easily squeezed out from both ends of the bearing, the bearing wears seriously, and the service life is short. In the embodiment, the friction coefficient of the self-aligning roller bearing 400 is generally between 0.005 to 0.01, and the lubrication is liquid, and the wear is small. Therefore, compared with the scheme of adopting the joint bearing, the embodiment has the advantages of smaller friction coefficient, smaller wear, longer service life and the like.

[0037] In addition, for the scheme of adopting the joint bearing, since the joint bearing belongs to the non-liquid sliding bearing, the friction coefficient is large, the friction coefficient in the stable wear stage can reach between 0.05 to 0.1, the resistance torque is large when the inner and outer rings of the bearing rotate, in addition, the lubricating grease is easily squeezed out from both ends of the bearing, the bearing wears seriously, and the service life is short. In the embodiment, the friction coefficient of the self-aligning roller bearing 400 is generally between 0.005 to 0.01, and the lubrication is liquid, and the wear is small. Therefore, compared with the scheme of adopting the joint bearing, the embodiment has the advantages of smaller friction coefficient, smaller wear, longer service life and the like.

[0038] Further, in the embodiment, since the mounting hole 110 is formed in the first connecting part 100, the pin shaft part 300 is rotatably penetrated in the mounting hole 110, and the self-aligning roller bearing 400 is arranged in the mounting hole 110, therefore, the first connecting part 100 can undertake part of the function of the bearing seat, which simplifies the structure of the bearing seat, reduces the number of parts, and shortens the size of the bolt 620 for fastening the bearing seat.

[0039] In some embodiments, the first connecting part 100 can be further provided with an oil injection channel 140 for injecting lubricating oil into the mounting hole 110. A grease nipple 150 can be arranged at the port of the oil injection channel 140 to be connected with an oil gun.

[0040] In some embodiments, the self-aligning roller bearings 400 are arranged in two groups, and the two groups of self-aligning roller bearings 400 are arranged in the axial direction of the pin shaft part 300; and the frame hinging device can further include a spacer sleeve 500 arranged in the mounting hole 110 and located between the two groups of self-aligning roller bearings 400 to separate the two groups of self-aligning roller bearings 400.

[0041] In the embodiment, the two groups of self-aligning roller bearings 400 are arranged in the axial direction of the pin shaft part 300, and the two groups of self-aligning roller bearings 400 respectively rotate to support the first connecting part 100 and the pin shaft part 300 in the axial direction of the pin shaft part 300, thereby improving the support effect.

[0042] The spacer sleeve 500 is arranged between the two groups of self-aligning roller bearings 400 to separate the two groups of self-aligning roller bearings 400, thereby avoiding interference between the two groups of self-aligning roller bearings 400. Specifically, the spacer sleeve 500 is sleeved and fastened on the pin shaft part 300, and in the axial direction of the pin shaft part 300, the two ends of the spacer sleeve 500 respectively abut against the inner rings of the two groups of self-aligning roller bearings 400, thereby avoiding the influence of the spacer sleeve 500 on the relative rotation of the inner ring and the outer ring.

[0043] In some embodiments, the second connecting part 200 comprises an upper connecting plate 210 and a lower connecting plate 220, and the upper connecting plate 210 is spaced apart from the lower connecting plate 220. The pin shaft part 300 is arranged through the upper connecting plate 210 and the lower connecting plate 220. The first connecting part 100 is arranged between the upper connecting plate 210 and the lower connecting plate 220.

[0044] In the present embodiment, the pin shaft part 300 is arranged through the upper connecting plate 210 and the lower connecting plate 220, and is fixed between the upper connecting plate 210 and the lower connecting plate 220, which further improves the stability of the pin shaft part 300 and the second connecting part 200. In addition, the first connecting part 100 is arranged between the upper connecting plate 210 and the lower connecting plate 220, which improves the balance of the pin shaft part 300 in the axial direction and improves the stability of the pin shaft part 300.

[0045] Further, the frame hinge device can further comprise a bearing cover 600 and a first sealing part 610. The bearing cover 600 is arranged to cover the opening of the mounting hole 110 on the side close to the upper connecting plate 210, and is used to cover the mounting hole 110. The first sealing part 610 is arranged on the inner side of the bearing cover 600 facing the mounting hole 110, and is used to seal the mounting hole 110.

[0046] As described above, since the two groups of bearings are arranged in the mounting hole 110 on the first connecting part 100, the first connecting part 100 can be used as part of the bearing seat, and the bearing seat needs to be additionally arranged. Only the opening of the mounting hole 110 close to the upper connecting plate 210 needs to be covered by the bearing cover 600 to protect the bearings. When the bearing cover 600 is installed, it can be fixed on the first connecting part 100 by using a plurality of bolts 620.

[0047] The first sealing part 610 can be a bearing sealing ring, and the first sealing part 610 is arranged on the inner side of the bearing cover 600 facing the mounting hole 110 to seal the lubricating cavity, prevent the lubricating oil from leaking, and prevent contaminants from entering the bearing and the lubricating cavity.

[0048] Further, the bearing cover 600 is provided with a first through hole 612 for the pin shaft part 300 to pass through, and when the pin shaft part 300 passes through the first through hole 612, the pin shaft part 300 and the first through hole 612 have a first gap 614. The frame hinge device can further comprise a positioning sleeve 700, which is sleeved on the pin shaft part 300 and arranged in the first gap 614, so that the first end of the positioning sleeve 700 abuts against the inner ring of the self-aligning roller bearing 400 close to the upper connecting plate 210, and the second end abuts against the upper connecting plate 210.

[0049] In the present embodiment, the positioning sleeve 700 is fixed with the pin shaft portion 300, and since the bearing cover 600 is fixed with the first connecting portion 100, a gap is required between the positioning sleeve 700 and the bearing cover 600 after the positioning sleeve 700 is inserted through the first gap 614 to allow relative rotation between the two. A sealing space is formed between the bearing cover 600 and the positioning sleeve 700, and the first sealing portion 610 can be arranged in the sealing space, so that the gap between the positioning sleeve 700 and the bearing is sealed to seal the opening of the mounting hole 110 close to the upper connecting plate 210.

[0050] In addition, since the first end of the positioning sleeve 700 abuts against the inner ring of the bearing and the second end abuts against the upper connecting plate 210 through the first gap 614 of the bearing cover 600, the positioning sleeve 700 can be used to isolate the bearing cover 600 (the first connecting portion 100) and the upper connecting plate 210 (the second connecting portion 200) to avoid rotation interference caused by contact between the two.

[0051] In some embodiments, the lower connecting plate 220 is provided with a second through hole 222 for the pin shaft portion 300 to pass through. The frame hinging device further comprises a fixing disc 800 fixed to the side of the lower connecting plate 220 away from the upper connecting plate 210, and the pin shaft portion 300 passes through the second through hole 222 and abuts against and is fixed to the fixing disc 800.

[0052] In the present embodiment, the fixing disc 800 can be a flange disc, which can protect the pin shaft portion 300. The fixing disc 800 can be fixed to the side of the lower connecting plate 220 away from the upper connecting plate 210 by a plurality of bolts 820. The pin shaft portion 300 passes through the second through hole 222 of the lower connecting plate 220 to reach the fixing disc 800, and then the pin shaft portion 300 is fixed to the fixing disc 800 by the bolts 830.

[0053] Further, when the pin shaft portion 300 passes through the second through hole 222, a second gap 224 is formed between the pin shaft portion 300 and the second through hole 222. The frame hinging device can further comprise a compression sleeve 900 sleeved on the pin shaft portion 300 and inserted through the second gap 224 and the mounting hole 110, so that the first end of the compression sleeve 900 abuts against the inner ring of the aligning roller bearing 400 close to the lower connecting plate 220 and the second end abuts against the fixing disc 800.

[0054] In the present embodiment, since the first end of the compression sleeve 900 abuts against the inner ring of the bearing close to the lower connecting plate 220 and then abuts against the surface of the fixing disc 800 through the second gap 224 on the second connecting plate, the compression sleeve 900 can be used to isolate the first connecting portion 100 and the lower connecting plate 220 (the second connecting portion 200) to avoid rotation interference caused by contact between the two.

[0055] Further, the first connecting part 100 is provided with a sealing hole 120 near one side of the lower connecting plate 220, the sealing hole 120 is connected with the mounting hole 110, the pressing sleeve 900 is arranged in the second gap 224, the sealing hole 120 and the mounting hole 110 to abut against the inner ring of the self-aligning roller bearing 400. The frame hinging device can further comprise a second sealing part 130, the second sealing part 130 is arranged in the sealing hole 120 to seal the gap between the inner wall of the sealing hole 120 and the pressing sleeve 900.

[0056] The second sealing part 130 can be a bearing sealing ring, the second sealing part 130 is arranged in the sealing hole 120 to seal the gap between the inner wall of the sealing hole 120 and the pressing sleeve 900, so as to seal the lubricating cavity, prevent the lubricating oil from leaking and prevent the pollutants from entering the bearing and the lubricating cavity.

[0057] In some embodiments, the frame hinging device can further comprise a sealing washer 810, the sealing washer 810 is arranged between the fixing disc 800 and the lower connecting plate 220 to seal the gap therebetween and prevent the sundries from entering the gap, in addition, the sealing washer 810 can also play a role in shock absorption to reduce the risk of the bolt 620 falling off.

[0058] The following will be described in combination with Figure 2 The mounting steps of the frame hinging device in one embodiment of the present application are as follows:

[0059] Step 1, arranging the second sealing part 130 in the sealing hole 120 of the first connecting part 100;

[0060] Step 2, sequentially arranging one of the self-aligning roller bearings 400, the spacer sleeve 500 and the other self-aligning roller bearing 400 in the mounting hole 110 of the first connecting part 100;

[0061] Step 3, arranging the first sealing part 610 on the bearing cover 600;

[0062] Step 4, arranging the bearing cover 600 on the first connecting part 100 by means of the bolt 620 to cover the mounting hole 110;

[0063] Step 5, arranging the positioning sleeve 700 in the first through hole 612 of the bearing cover 600;

[0064] Step 6, aligning the mounting hole 110 of the first mounting part with the second through hole 222 of the second mounting part;

[0065] Step 7, arranging the pin shaft part 300 in the mounting hole 110 and the second through hole 222 from top to bottom and aligning the groove on the upper end surface of the pin shaft part 300 with the positioning pin 310;

[0066] Step 8, pass the compression sleeve 900 through the second through hole 222 and the sealing hole 120 from bottom to top, and abut on the inner ring of the self-aligning roller bearing 400;

[0067] Step 9, measure the distance between the lower end surface of the lower connecting plate 220 and the lower end of the compression sleeve 900, and select a suitable sealing washer 810 to make the lower end surface of the lower connecting plate 220 flush with the lower end of the compression sleeve 900;

[0068] Step 10, install the fixing disc 800 to the side of the lower connecting plate 220 away from the upper connecting plate 210 by using the bolt 820;

[0069] Step 11, fix the pin shaft part 300 on the fixing disc 800 by using the washer 840 and the bolt 830.

[0070] It should be noted that the above installation steps are only to assist those skilled in the art to understand the structure of the frame hinging device of the present application, and do not mean that the frame hinging device of the present application must be strictly installed according to the above steps.

[0071] Referring to Figure 3 , the present application also provides a loader, which can be a wheel loader in particular, the loader having a front frame 10 and a rear frame 20 relatively rotatable.

[0072] Further, the loader can also include the frame hinging device in any of the above embodiments, wherein the first connecting part 100 is fixed to the front frame 10, the second connecting part 200 is fixed to the rear frame 20, and the rotation support between the front frame 10 and the rear frame 20 is realized by the pin shaft part 300 and the at least one set of self-aligning roller bearings 400.

[0073] It should be noted that the "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like mentioned in the specification represent that the described embodiment can include a specific feature, structure or characteristic, but not necessarily every embodiment includes the specific feature, structure or characteristic. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure or characteristic is described in connection with an embodiment, it is within the knowledge of those skilled in the art to realize such feature, structure or characteristic in connection with other embodiments described explicitly or implicitly.

[0074] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and such modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A frame articulation device for articulating a front frame (10) and a rear frame (20), characterized in that: The frame articulation device comprises: A first connecting portion (100), the first connecting portion (100) being used to be fixed to the front frame (10), and the first connecting portion (100) is formed with a mounting hole (110); a second connecting portion (200), the second connecting portion (200) being used to be fixed to the rear frame (20); A pin shaft portion (300), the pin shaft portion (300) being fixed to the second connecting portion (200), the pin shaft portion (300) being rotatably disposed through the mounting hole (110) and being fixed to the second connecting portion (200); At least one set of spherical roller bearings (400) is provided in the mounting hole (110), and the inner ring of each set of spherical roller bearings (400) is sleeved and fixed on the pin shaft (300), and the outer ring of each set of spherical roller bearings (400) is fixed on the inner wall of the mounting hole (110).

2. The frame hinge device according to claim 1, characterized in that: The spherical roller bearings (400) are provided in two groups, and the two groups of spherical roller bearings (400) are spaced apart along the axial direction of the pin shaft portion (300); and the frame articulation device further comprises: A spacer sleeve (500) is provided in the mounting hole (110) and is located between the two groups of spherical roller bearings (400) to separate the two groups of spherical roller bearings (400).

3. The frame hinge device according to claim 1, characterized in that: The second connecting portion (200) comprises an upper connecting plate (210) and a lower connecting plate (220), wherein the upper connecting plate (210) and the lower connecting plate (220) are spaced apart from each other; The pin shaft portion (300) is provided through the upper connecting plate (210) and the lower connecting plate (220); The first connecting portion (100) is located between the upper connecting plate (210) and the lower connecting plate (220).

4. The frame hinge device according to claim 3, characterized in that: Also includes: A bearing cover (600), the bearing cover (600) being arranged to cover an opening on one side of the mounting hole (110) close to the upper connecting plate (210) and used to seal the mounting hole (110); A first sealing portion (610) is provided on the inner side of the bearing cover (600) facing the mounting hole (110) and is used to seal the mounting hole (110).

5. The frame hinge device according to claim 4, characterized in that: The bearing cover (600) is provided with a first through hole (612) for the pin shaft portion (300) to pass through, and when the pin shaft portion (300) passes through the first through hole (612), a first gap (614) is provided between the pin shaft portion (300) and the first through hole (612); The frame articulation device further comprises: A positioning sleeve (700) is sleeved on the pin shaft portion (300) and passed through the first gap (614) so ​​that its first end contacts the inner ring of the spherical roller bearing (400) close to the upper connecting plate (210) and its second end contacts the upper connecting plate (210).

6. The frame articulation device according to any one of claims 3 to 5, characterized in that: The lower connecting plate (220) is provided with a second through hole (222) for the pin shaft portion (300) to pass through; The frame articulation device further comprises: A fixed plate (800) is fixed to a side of the lower connecting plate (220) facing away from the upper connecting plate (210), and the pin shaft portion (300) is passed through the second through hole (222) so that its end contacts and is fixed to the fixed plate (800).

7. The frame hinge device according to claim 6, characterized in that: When the pin shaft portion (300) is inserted into the second through hole (222), a second gap (224) is formed between the pin shaft portion (300) and the second through hole (222); the frame hinge device further comprises: A compression sleeve (900) is sleeved on the pin shaft portion (300) and penetrates the second gap (224) and the mounting hole (110), so that its first end contacts the inner ring of the spherical roller bearing (400) close to the lower connecting plate (220) and its second end contacts the fixed plate (800).

8. The frame articulation device according to claim 7, characterized in that: A sealing hole (120) is provided on one side of the first connecting portion (100) close to the lower connecting plate (220), the sealing hole (120) is connected to the mounting hole (110), and the compression sleeve (900) is inserted through the second gap (224), the sealing hole (120) and the mounting hole (110) to contact the inner ring of the spherical roller bearing (400); The frame articulation device further comprises: A second sealing portion (130) is provided in the sealing hole (120) and is used to seal the gap between the inner wall of the sealing hole (120) and the compression sleeve (900).

9. The frame hinge device according to claim 6, characterized in that: Also includes: A sealing gasket (810) is provided between the fixing plate (800) and the lower connecting plate (220) to seal the gap therebetween.

10. A loader, characterized in that A vehicle frame hinge device comprising the frame hinge device according to any one of claims 1 to 9.

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