CN113073694B - Pivot box, bogie frame and bulldozer - Google Patents

Abstract

The invention discloses a pivot box, a bogie frame and a bulldozer, and belongs to the technical field of engineering mechanical equipment. The outer layer is connected with the opposite two sides of the box body and is provided with a first mounting hole and a second mounting hole; the pivot cavity assembly comprises a first pivot bushing mounting piece, a pivot cavity and a second pivot bushing mounting piece, the first pivot bushing mounting piece and the second pivot bushing mounting piece are fixedly connected in the first mounting hole and the second mounting hole respectively, the pivot cavity is arranged in the outer layer connecting box body, one end of the pivot cavity is in sealing connection with the first pivot bushing mounting piece, and the other end of the pivot cavity is in sealing connection with the second pivot bushing mounting piece. The pivot box, the bogie frame and the bulldozer are easy to ensure the sealing performance, basically and completely eliminate the hidden danger of oil leakage, and reduce the later maintenance cost; and the strength is high.

Description

Pivot box, bogie frame and bulldozer

Technical Field

The invention relates to the technical field of engineering mechanical equipment, in particular to a pivot box, a bogie frame and a bulldozer.

Background

One end of a pivot in the bulldozer is fixedly installed on the frame through a bolt, and the other end of the pivot is in sliding fit with the mounting surfaces of the bushings on the inner side and the outer side of the pivot box, so that the bulldozer mainly plays a role in hanging the trolley frame. The pivot box is connected with the pivot in a matching mode, and the bulldozer is in working process because the ground is uneven, the trolley frame has a certain rotating angle along the pivot through the pivot box, the pivot and the pivot box generate sliding friction due to rotation, lubricating oil needs to be injected into the pivot box for reducing abrasion, and therefore the requirement on the sealing performance of the pivot box body is high, and the lubricating oil is prevented from being leaked.

After the installation bushings of the inner side bushing and the outer side bushing of the traditional pivot box are installed, the inner side installation surface and the outer side installation surface corresponding to the pivot are in sliding friction, the pivot box is sealed through the inner side end cover and the outer side end cover, a hollow structure is formed, the inner cavity is large in size, the traditional pivot box is integrally a casting part, the quality of the casting part is greatly restricted at present, even if a pressurizing process is carried out in the production process, the inner cavity does not have working pressure, the tiny leakage initial stage caused by casting defects is difficult to find, the follow-up oil leakage hidden danger exists, the oil leakage is found after part of bulldozers work for a long time, the trolley frame needs to be replaced or the weld repair and the pressurizing repair are needed, the market repair cost is high, and great loss is caused to enterprises and customers. Meanwhile, after casting, molding sand in the pivot box is extremely inconvenient to clean, the cleanliness is poor, and the quality is difficult to guarantee.

Therefore, a need exists for a pivot box, a bogie frame and a bulldozer with low post-maintenance cost, so as to solve the above technical problems in the prior art.

Disclosure of Invention

The invention aims to provide a pivot box, a bogie frame and a bulldozer, wherein the pivot box, the bogie frame and the bulldozer are easy to ensure the sealing performance, basically and completely eliminate the hidden danger of oil leakage and reduce the later maintenance cost; and the strength is high.

In order to achieve the purpose, the invention adopts the following technical scheme:

a pivot housing, comprising:

the outer layer connecting box body is used for being connected with a bent plate assembly of the trolley frame, a first mounting hole and a second mounting hole are formed in the two opposite sides of the outer layer connecting box body, and a first oil filling hole is further formed in the outer layer connecting box body;

the pivot cavity assembly comprises a first pivot bushing mounting piece, a pivot cavity and a second pivot bushing mounting piece, wherein the first pivot bushing mounting piece and the second pivot bushing mounting piece are fixedly connected in the first mounting hole and the second mounting hole respectively, the first pivot bushing mounting piece and the second pivot bushing mounting piece are used for mounting bushings, the pivot cavity is arranged inside the outer layer connecting box body, one end of the pivot cavity is in sealing connection with the first pivot bushing mounting piece, the other end of the pivot cavity is in sealing connection with the second pivot bushing mounting piece, the pivot cavity is used for accommodating a pivot, a second oil filling hole is formed in the pivot cavity, and the first oil filling hole is communicated with the second oil filling hole.

As a preferable technical scheme of the pivot box, the outer layer connecting box body is of a structure formed by welding a plurality of plates.

As a preferred embodiment of the pivot housing, the first pivot bushing mounting member is a first circular flange, the second pivot bushing mounting member is a second circular flange, the pivot cavity is a circular tube, and both ends of the circular tube are welded to the first circular flange and the second circular flange, respectively.

In order to achieve the above object, the present invention further provides a trolley frame, which includes a guide wheel mounting assembly, a bending plate assembly, a front tug bracket assembly, a rear tug bracket assembly and the pivot box, wherein the guide wheel mounting assembly and the pivot box are respectively disposed at two ends of the bending plate assembly, the front tug bracket assembly and the rear tug bracket assembly are disposed on the bending plate assembly, the front tug bracket assembly is disposed close to the guide wheel mounting assembly, and the rear tug bracket assembly is disposed close to the pivot box.

As an optimal technical scheme of the trolley frame, the guide wheel mounting assembly comprises a vertical plate mounting plate, a first bent plate, a second bent plate, a reinforcing bent plate, a first mud guard mounting plate and a second mud guard mounting plate, the vertical plate mounting plate is mounted on the bent plate assembly, the first bent plate and the second bent plate are respectively arranged on two sides of the vertical plate mounting plate, the reinforcing bent plate is connected to the first bent plate and the second bent plate, and the first mud guard mounting plate and the second mud guard mounting plate are respectively arranged on the lower portions of the first bent plate and the second bent plate.

As an optimal technical scheme of the bogie frame, the bogie frame further comprises a first mudguard and a second mudguard, and the first mudguard and the second mudguard are detachably connected to the first mudguard mounting plate and the second mudguard mounting plate respectively.

As a preferred technical scheme of a bogie frame, the bent plate subassembly includes bent plate, interior baffle, two lower panels and two interior plates, the bent plate includes integrated into one piece's bent plate portion and is located the riser portion of bent plate portion both sides, interior baffle is connected in two on the internal face of riser portion, two interior plates connect in the preset position department of interior baffle lower part both sides, two the panel is connected respectively in both sides the interior plate with between the riser portion.

As a preferred technical solution of the bogie frame, two ends of an assembly formed by connecting the inner partition, the two lower panels and the two inner side panels are all longer than the bent plate, so as to mount the guide wheel mounting assembly and the pivot box.

As a preferred technical scheme of the trolley frame, the front tug bracket assembly comprises a fixed plate assembly, a first mounting plate and a second mounting plate assembly, and the fixed plate assembly is fixedly connected to the bent plate assembly; the first mounting plate is connected to the fixed plate assembly and used for fixing a tug bracket; the second mounting plate group is connected to the fixed plate component and used for connecting the balance beam.

In order to achieve the purpose, the invention also provides a bulldozer which comprises the bogie frame.

The invention provides a pivot box, which comprises an outer layer connecting box body and a pivot cavity assembly positioned in the outer layer connecting box body, wherein the outer layer connecting box body is mainly used for being connected with a bent plate assembly of a trolley frame; the pivot cavity assembly is mainly used for accommodating and placing a pivot, the pivot cavity assembly comprises a first pivot bushing mounting piece, a pivot cavity and a second pivot bushing mounting piece, the pivot cavity assembly is fixed on the outer layer connecting box body through the first pivot bushing mounting piece and the second pivot bushing mounting piece, and two ends of the pivot cavity are respectively connected with the first pivot bushing mounting piece and the second pivot bushing mounting piece in a sealing mode. The hidden danger of oil leakage is basically and completely eliminated, so that the later maintenance cost is reduced; compared with the traditional hollow structure, the double-layer structure of the pivot box improves the integral structural strength of the pivot box.

The invention also provides a trolley frame which comprises a guide wheel mounting component, a bent plate component, a front tug bracket component, a rear tug bracket component and the pivot box, wherein the guide wheel mounting component, the bent plate component, the front tug bracket component, the rear tug bracket component and the pivot box can be assembled on different stations respectively, so that the production operation mode that all components are machined firstly and then assembled finally is convenient to realize, the productivity can be improved, and the trolley frame is suitable for mass production.

The invention also provides a bulldozer which comprises the trolley frame, has low later maintenance cost and is suitable for mass production.

Drawings

FIG. 1 is an isometric view of a pivot housing provided in accordance with an embodiment of the present invention;

FIG. 2 is a top view of a pivot housing provided in accordance with an embodiment of the present invention;

FIG. 3 is a front view of a pivot housing provided in accordance with an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3 according to one embodiment of the present invention;

FIG. 5 is a cross-sectional view of a pivot chamber body assembly according to one embodiment of the present invention;

FIG. 6 is an isometric view of a bogie frame provided in accordance with a second embodiment of the present invention;

FIG. 7 is a front view of a bogie frame according to a second embodiment of the present invention;

FIG. 8 is a top view of a bogie frame according to a second embodiment of the present invention;

FIG. 9 is a left side view of the bogie frame according to the second embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a guide wheel mounting assembly provided in accordance with a second embodiment of the present invention;

FIG. 11 is a schematic view of a first fender according to a second embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a flexural plate assembly provided in accordance with a second embodiment of this invention;

FIG. 13 is a cross-sectional view taken at B-B of FIG. 12 in accordance with a second embodiment of the present invention;

FIG. 14 is a first perspective structural view of a front tug bracket assembly in accordance with a second embodiment of the present invention;

FIG. 15 is a structural schematic diagram of a second perspective view of a front tug bracket assembly in accordance with a second embodiment of the invention;

fig. 16 is a schematic structural view of a rear tug bracket assembly according to a second embodiment of the invention.

Reference numerals:

1. the outer layer is connected with the box body; 11. a first filler hole; 12. a first connection side plate; 13. a second connecting side plate; 14. a third connecting side plate; 15. a fourth connecting side plate; 16. an upper plate; 17. a plugging plate; 2. a pivot cavity assembly; 21. a first pivot bushing mount; 22. a pivot cavity; 23. a second pivot bushing mount;

100. a guide wheel mounting assembly; 1001. mounting a vertical plate; 1002. a first bent plate; 1003. a second bent plate; 1004. reinforcing the bent plate; 1005. a first fender mounting plate; 1006. a second fender mounting plate; 200. a bent plate assembly; 2001. bending a plate; 2002. an inner partition plate; 2003. a lower panel; 2004. an inner side plate; 300. a front tug bracket assembly; 3001. a fixed plate assembly; 30011. reinforcing ribs; 30012. a seat plate; 3002. a first mounting plate; 3003. a second mounting plate; 3004. a rib plate; 400. a rear tug bracket assembly; 4001. a tug bracket mounting plate; 4002. a side support plate; 500. a pivot housing; 600. a first fender.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

As shown in fig. 1 to 5, the present embodiment provides a pivot box 500, where the pivot box 500 includes an outer layer connecting box 1 and a pivot cavity assembly 2, where the outer layer connecting box 1 is used for connecting with a bent plate assembly 200 of a bogie frame, two opposite sides of the outer layer connecting box 1 are provided with a first mounting hole and a second mounting hole, and the outer layer connecting box 1 is further provided with a first oil filling hole 11; the pivot cavity assembly 2 comprises a first pivot bushing mounting piece 21, a pivot cavity 22 and a second pivot bushing mounting piece 23, the first pivot bushing mounting piece 21 and the second pivot bushing mounting piece 23 are respectively and fixedly connected in a first mounting hole and a second mounting hole, the first pivot bushing mounting piece 21 and the second pivot bushing mounting piece 23 are both used for mounting bushings, the pivot cavity 22 is arranged inside the outer layer connecting box body 1, one end of the pivot cavity 22 is in sealing connection with the first pivot bushing mounting piece 21, the other end of the pivot cavity 22 is in sealing connection with the second pivot bushing mounting piece 23, the pivot cavity 22 is used for accommodating a pivot, a second oil filling hole is formed in the pivot cavity 22, and the first oil filling hole 11 is communicated with the second oil filling hole.

The pivot box 500 comprises an outer layer connecting box body 1 and a pivot cavity component 2 positioned in the outer layer connecting box body 1, wherein the outer layer connecting box body 1 is mainly used for being connected with a bent plate component 200 of the trolley frame; the pivot cavity assembly 2 is mainly used for accommodating and placing a pivot, the pivot cavity assembly 2 includes a first pivot bushing mounting member 21, a pivot cavity 22 and a second pivot bushing mounting member 23, the pivot cavity assembly 2 is fixed on the outer layer connecting box 1 through the first pivot bushing mounting member 21 and the second pivot bushing mounting member 23, and two ends of the pivot cavity 22 are respectively connected with the first pivot bushing mounting member 21 and the second pivot bushing mounting member 23 in a sealing manner, the pivot box 500 in this embodiment reduces the volume of the pivot cavity assembly 2 accommodating the pivot in the pivot box 500 through a functional partition manner, thereby reducing the space of the inner cavity to be sealed, compared with the conventional pivot box which needs to ensure the sealing of a larger inner cavity, the pivot box 500 in this embodiment is easier to ensure the sealing, and only needs to ensure the sealing of the connection between the first pivot bushing mounting member 21 and the second pivot bushing mounting member 23 and the pivot cavity 22, the operation is simple, the hidden danger of oil leakage is basically and completely eliminated, and the later maintenance cost is reduced; in addition, in the double-layer structure of the pivot box 500 in the embodiment, the pivot cavity assembly 2 is equivalent to a beam in the pivot box, and compared with the conventional hollow structure, the overall structural strength of the pivot box 500 is improved.

Preferably, in this embodiment, two ends of the pivot cavity 22 are respectively connected with the first pivot bushing mounting member 21 and the second pivot bushing mounting member 23 by welding, and only the compactness of two circular welds needs to be detected; further preferably, the outer connecting box body 1 is a multi-plate welded structure. Therefore, the pivot box 500 is integrally of a plate welding structure, the structure is simple, the manufacturability is good, investment on casting molds is not needed, the production period is short, the influence of casting resource shortage caused by casting quality and environmental protection pressure of castings is completely eliminated, the production cost is low, and the quality is convenient to control.

Specifically, as shown in fig. 1 to 3, the outer layer connecting box body 1 includes a first connecting side plate 12, a second connecting side plate 13, a third connecting side plate 14, a fourth connecting side plate 15 and an upper plate 16, wherein the first connecting side plate 12 and the second connecting side plate 13 are arranged opposite to each other, the third connecting side plate 14 and the fourth connecting side plate 15 are arranged opposite to each other, and two side edges of the third connecting side plate 14 and the fourth connecting side plate 15 are welded to the first connecting side plate 12 and the second connecting side plate 13; the upper plate 16 is located at the upper portions of the first, second, third, and fourth connecting side plates 12, 13, 14, and 15, and the upper plate 16 is welded to the first, second, third, and fourth connecting side plates 12, 13, 14, and 15. In this embodiment, the second connecting side plate 13 has an operating window, and the operating window is sealed by a sealing plate 17, and the sealing plate 17 is connected to the second connecting side plate 13.

Preferably, the first pivot bushing mount 21 is a first circular flange, the second pivot bushing mount 23 is a second circular flange, the pivot cavity 22 is a circular tube, and both ends of the circular tube are welded to the first circular flange and the second circular flange, respectively. Preferably, in this embodiment, the first circular flange and the second circular flange have the same specification. In this embodiment, the inner diameter of the circular tube is larger than the inner diameters of the first circular flange and the second circular flange, so that when the pivot shaft, the bush and the pivot shaft cavity assembly 2 are assembled, the pivot shaft and the inner wall of the circular tube form a small closed inner cavity which can contain lubricating oil, and lubricating oil can be injected into the inner cavity through the second oil filling hole and the first oil filling hole 11.

Preferably, in the present embodiment, in order to facilitate the later injection of the lubricating oil into the circular pipe, the axes of the first oil filling hole 11 and the second oil filling hole coincide.

Example two

As shown in fig. 6 to 9, the present embodiment provides a bogie frame, which includes a leading wheel mounting assembly 100, a bending plate assembly 200, a front tug carriage assembly 300, a rear tug carriage assembly 400, and a pivot box 500 according to the first embodiment, wherein the leading wheel mounting assembly 100 and the pivot box 500 are respectively disposed at two ends of the bending plate assembly 200, the front tug carriage assembly 300 and the rear tug carriage assembly 400 are disposed on the bending plate assembly 200, the front tug carriage assembly 300 is disposed near the leading wheel mounting assembly 100, and the rear tug carriage assembly 400 is disposed near the pivot box 500.

The guide wheel mounting assembly 100, the bent plate assembly 200, the front tug bracket assembly 300, the rear tug bracket assembly 400 and the pivot box 500 can be assembled on different stations respectively, so that the production operation mode that all parts are machined and manufactured firstly and then assembled is realized, the productivity can be improved, and the assembly method is suitable for mass production.

Preferably, in this embodiment, the leading wheel mounting assembly 100, the front tug bracket assembly 300, the rear tug bracket assembly 400 and the pivot housing 500 are all connected to the knee plate assembly 200 by welding. The whole welding structure of this bogie frame adoption has realized the modularization production, reduces total welding process man-hour, improves the productivity.

Preferably, as shown in fig. 10, the guide wheel mounting assembly 100 includes a vertical plate mounting plate 1001, a first bending plate 1002, a second bending plate 1003, a reinforcing bending plate 1004, a first mudguard mounting plate 1005 and a second mudguard mounting plate 1006, the vertical plate mounting plate 1001 is mounted on the bending plate assembly 200, the first bending plate 1002 and the second bending plate 1003 are respectively disposed at two sides of the vertical plate mounting plate 1001, the reinforcing bending plate 1004 is connected to the first bending plate 1002 and the second bending plate 1003, and the first mudguard mounting plate 1005 and the second mudguard mounting plate 1006 are respectively disposed at lower portions of the first bending plate 1002 and the second bending plate 1003. The guide wheel mounting assembly 100 is primarily for the fixed mounting of a front end guide wheel assembly in a bogie frame. The guide wheel mounting assembly 100 is simple in structure and mainly comprises bent plates such as a first bent plate 1002, a second bent plate 1003 and a reinforcing bent plate 1004, the bent plates can be subjected to work hardening in the bending process, the strength can be improved by 30-50%, and the overall structural strength is increased.

Preferably, in the present embodiment, in order to improve the overall strength of the guide wheel mounting assembly 100, a rib structure (not shown) is further provided inside the guide wheel mounting assembly.

Preferably, as shown in fig. 10 and 11, the bogie frame further comprises a first fender 600 and a second fender, and the first fender 600 and the second fender are detachably connected to the first fender mounting plate 1005 and the second fender mounting plate 1006, respectively. Further preferably, in this embodiment, a plurality of first mounting holes are formed in the first fender mounting plate 1005 and the second fender mounting plate 1006, a plurality of second mounting holes are formed in corresponding positions of the first fender 600 and the second fender, and the first fender 600 and the second fender are fixed to the first fender mounting plate 1005 and the second fender mounting plate 1006 by passing fasteners through the first mounting holes and the second mounting holes. Along with the extension of bull-dozer operating time, first fender 600 and second fender wear out the back that became invalid, can change the fender, the maintenance cost of market is low.

In this embodiment, first fender 600 and second fender are the veneer structure, for traditional panel beating welded structure, need not investment die mould, simple process, and manufacturing cycle is short, low in manufacturing cost.

Preferably, as shown in fig. 12 and 13, the bending plate assembly 200 includes a bending plate 2001, an inner partition 2002, two lower panels 2003 and two inner panels 2004, the bending plate 2001 includes a bending plate portion and riser portions located at both sides of the bending plate portion, the inner partition 2002 is connected to inner wall surfaces of the two riser portions, the two inner panels 2004 are connected to predetermined positions at both sides of a lower portion of the inner partition 2002, and the two lower panels 2003 are respectively connected between the inner panels 2004 and the riser portions at both sides. Preferably, in this embodiment, the bent plate 2001, the inner partition 2002, the two lower panels 2003 and the two inner panels 2004 are all welded. The curved plate 2001, the inner spacer 2002, the two lower plates 2003 and the two inner plates 2004 in this embodiment are joined to form an integral structure of "curved plate + two square boxes". The both sides of bent plate 2001 are vertical portion, compare in the inclined plane structure of traditional bent plate both sides, and the bent plate 2001 in this embodiment is convenient for the detection and the precision assurance of bent plate portion to take place to interfere or the gap is too big when avoiding follow-up and preceding tow boat bracket assembly 300 and rear tow boat bracket assembly 400 welding.

Preferably, the inner partition 2002, the two lower panels 2003 and the two inner panels 2004 are connected to form an assembly having both ends longer than the bent plate 2001 for mounting the guide wheel mounting assembly 100 and the pivot housing 500.

Preferably, as shown in fig. 14 and 15, the front tug bracket assembly 300 includes a fixed plate assembly 3001, a first mounting plate 3002 and a second mounting plate assembly 3003, the fixed plate assembly 3001 being fixedly connected to the bent plate assembly 200; the first mounting plate 3002 is connected to the fixing plate assembly 3001 and is used for fixing the tug bracket; a second mounting plate set 3003 is attached to the fixed plate assembly 3001 for attachment to a balance beam. The bogie frame has the advantages of avoiding the traditional bogie frame from having a balance beam frame and a tug bracket, along with simple structure, less material consumption, effective reduction of the whole weight and reduction of the manufacturing cost.

Specifically, fixed plate subassembly 3001 includes strengthening rib 30011 and bedplate 30012, second mounting plate group 3003 includes two risers, two riser homogeneous ends weld in strengthening rib 30011, the other end welds on bedplate 30012, it is used for installing the compensating beam to have seted up the third mounting hole on the riser, first mounting panel 3002 welds in the upper end of riser, and seted up the fourth mounting hole on first mounting panel 3002 and be used for installing fixed tow boat support, strengthening rib 30011 and bedplate 30012 all weld with bent plate 2001, bedplate 30012 area is big, it is big with bent plate 2001 welding area, thereby the joint strength of preceding tow boat support subassembly 300 and bent plate subassembly 200 has been improved. In this embodiment, to further improve the strength of the front tug bracket assembly 300, a plurality of rib plates 3004 are further disposed between the two vertical plates.

In this embodiment, the structures of the front tug bracket assembly 300 are connected by welding. The front tug bracket assembly 300 in the embodiment is formed by welding a plurality of plates, meets the requirements on function and strength, and is free from the restriction of the quality of castings and the shortage of casting resources, the manufacturing period is short, and the quality is convenient to control.

As shown in fig. 16, the rear tug bracket assembly 400 includes a tug bracket mounting plate 4001 and a plurality of side supporting plates 4002, wherein the rear tug bracket mounting plate 4001 is provided with a fifth mounting hole for mounting and fixing the tug bracket, one end of the side supporting plate 4002 is welded on the tug bracket mounting plate 4001, the other end is welded on the bent plate 2001, and after welding, processing is not required, and then the whole assembling and welding of the bogie frame is performed.

In summary, the bogie frame provided by the present embodiment includes a guide wheel mounting assembly 100, a bent plate assembly 200, a front tug bracket assembly 300, a rear tug bracket assembly 400 and a pivot box 500, the bogie frame main body is welded together by the guide wheel mounting assembly 100 at the front end, the bent plate assembly 200 in the middle and the pivot box 500 at the rear end, the front tug bracket assembly 300 and the rear tug bracket assembly 400 are respectively welded on the bogie frame main body, wherein the front tug bracket assembly 300 is used for both fixing and mounting the front tug and also for mounting the balance beam. The trolley frame has the following advantages:

1) this bogie frame's bent plate subassembly 200 adopts "bent plate + two square box shape" overall structure that "bent plate + two square box shape" that the bent plate 2001+ inner baffle 2002+ lower panel 2003+ interior plate 2004 formed, and the bent plate 2001 surrounds two square boxes, and the square box acts as two legs of bogie frame, and for hollow structure, the spaciousness nature is good, and the assembly manufacturability is good, and is provided with the reinforcing plate between two square boxes, overall structure intensity is high, and factor of safety is high, long service life.

2) This platform truck frame bent plate 2001 no longer runs through the front and back, and each part mutually independent design can realize that each part processes the preparation back alone, then assembly welding once, and each widget is assembly welding earlier, back assembly welding promptly, and the substep is implemented, reduces assembly welding's pressure, is convenient for realize automatic welding, and mass production operation can increase substantially the productivity. The bent plate 2001 does not penetrate through the front and the back, namely, the front and the back protrude, so that the material utilization rate is improved, and the manufacturing cost is reduced.

3) The trolley frame is of a plate welding structure, casting design is omitted, investment on a mold is not needed, the manufacturing period is short, the manufacturing cost is low, the problem that the manufacturing cost is high due to the fact that casting resources are short due to environmental protection pressure at present is solved, and the cost can be saved by at least 30%.

4) This pivot case 500 of bogie frame changes the seam piece into, only need require the leakproofness to the less inner chamber that pivot cavity body subassembly 2 formed, and no longer all require the leakproofness to whole cavity big chamber like traditional pivot case casting structure, only need to pivot cavity body subassembly 2 welding back suppress can, only need detect the compactness of two girth welds, because girth weld is external weld, moreover, the operation is simple, the welding seam quality is very easy to guarantee, can thoroughly eliminate the oil leak hidden danger, completely break away from the restriction that receives pivot case foundry goods casting quality, can thoroughly eliminate the oil leak hidden danger, enterprise and customer market cost of maintenance are reduced by a wide margin. Meanwhile, the pivot cavity assembly 2 may serve as a cross member (reinforcing rib) of the pivot housing 500, and may significantly improve the overall structural strength of the pivot housing 500 compared to a hollow structure of a conventional cast pivot housing. The inner cavity formed after the pivot cavity assembly 2 of the pivot box 500 is welded basically has no spatters such as welding slag, welding beans and the like, does not need to be cleaned, and has good cleanliness and easy quality guarantee compared with the traditional cast pivot box.

5) The bent plate 2001 structure of the trolley frame is optimized, the two side faces are changed into vertical structures from inclined faces, manufacturing accuracy is easy to guarantee, consistency is good, and the problems of difficult adjustment (interference or large gap) and long working hours existing in the welding process of the trolley frame and a towing wheel support are solved.

6) The fender of the bogie frame is changed into a detachable mounting structure from a traditional welding structure with a bogie frame main body, the fender can be replaced after being worn and failed, and the market maintenance cost is low; meanwhile, the fender is of a single-plate structure instead of a metal plate welding structure, the process is simple, the manufacturing cost is low, and the cost is saved by about 30%.

7) This front tow wheel bracket component 300 of bogie frame both has been used for the fixed mounting of front tow wheel, still is used for the installation of compensating beam, compares in the existing compensating beam frame of traditional bogie frame and has the front tow wheel support again, has practiced thrift the material and has reduced whole weight, great range saving manufacturing cost. When welding with the bogie frame main part, the existing strengthening rib 30011 of both sides, bedplate 30012 area ratio is bigger simultaneously, and is big with bogie frame main part periphery welding range, and joint strength is high, still need drill hole to carry out plug welding with the mode that increases joint strength when comparing in the welding of traditional balanced roof beam frame of foundry goods and bogie frame main part, and preceding tow boat bracket component 300 in this embodiment designs simple structure, and intensity is high, low in manufacturing cost.

8) The guide wheel mounting assembly 100 of the trolley frame is simple in structure and mainly composed of a first bent plate 1002, a second bent plate 1003 and a reinforcing bent plate 1004 on the inner side and the outer side, the bent plates can be machined and hardened in the bending process, the strength can be improved by 30-50%, the inner side and the outer side of the bent plates are connected together through the reinforcing bent plate 1004, the overall structural strength is high, and compared with the traditional trolley frame in the overall bottom plate structure form, the guide wheel mounting assembly 100 is greatly improved in strength.

EXAMPLE III

The present embodiment provides a bulldozer including the bogie frame of the second embodiment. The bulldozer has the advantages of low later maintenance cost, suitability for mass production and the like.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (10)

1. A pivot housing, comprising:

the outer layer connecting box body (1), the outer layer connecting box body (1) is used for being connected with a bent plate assembly of a trolley frame, a first mounting hole and a second mounting hole are formed in two opposite sides of the outer layer connecting box body (1), and a first oil filling hole (11) is further formed in the outer layer connecting box body (1);

a pivot chamber assembly (2) comprising a first pivot bushing mount (21), a pivot chamber (22) and a second pivot bushing mount (23), the first pivot bushing mount (21) and the second pivot bushing mount (23) being fixedly connected within the first mounting hole and the second mounting hole, respectively, the first pivot bushing mount (21) and the second pivot bushing mount (23) each for mounting a bushing, the pivot cavity (22) is arranged in the outer layer connecting box body (1), one end of the pivot cavity (22) is sealingly connected to the first pivot bushing mounting member (21) and the other end is sealingly connected to the second pivot bushing mounting member (23), the hinge cavity (22) is used for accommodating a hinge, a second oil filling hole is formed in the hinge cavity (22), and the first oil filling hole (11) is communicated with the second oil filling hole.

2. A pivot housing as claimed in claim 1, characterised in that the outer layer connecting housing (1) is a multi-sheet welded construction.

3. A pivot housing according to claim 1, characterized in that the first pivot bushing mount (21) is a first circular flange, the second pivot bushing mount (23) is a second circular flange, the pivot chamber (22) is a circular tube, both ends of which are welded to the first and second circular flanges, respectively.

4. A bogie frame comprising a leading wheel mounting assembly (100), a knee plate assembly (200), a front tug bracket assembly (300), a rear tug bracket assembly (400) and a pivot housing (500) according to any one of claims 1-3, wherein the leading wheel mounting assembly (100) and the pivot housing (500) are respectively disposed at two ends of the knee plate assembly (200), the front tug bracket assembly (300) and the rear tug bracket assembly (400) are disposed on the knee plate assembly (200), and the front tug bracket assembly (300) is disposed near the leading wheel mounting assembly (100), and the rear tug bracket assembly (400) is disposed near the pivot housing (500).

5. The bogie frame according to claim 4, wherein the guide wheel mounting assembly (100) comprises a vertical plate mounting plate (1001), a first bent plate (1002), a second bent plate (1003), a reinforced bent plate (1004), a first fender mounting plate (1005) and a second fender mounting plate (1006), wherein the vertical plate mounting plate (1001) is mounted on the bent plate assembly (200), the first bent plate (1002) and the second bent plate (1003) are respectively arranged at two sides of the vertical plate mounting plate (1001), the reinforced bent plate (1004) is connected to the first bent plate (1002) and the second bent plate (1003), and the first fender mounting plate (1005) and the second fender mounting plate (1006) are respectively arranged at lower parts of the first bent plate (1002) and the second bent plate (1003).

6. The bogie frame of claim 5, further comprising a first fender (600) and a second fender, wherein the first fender (600) and the second fender are removably attached to the first fender mounting plate (1005) and the second fender mounting plate (1006), respectively.

7. The bogie frame according to claim 4, wherein the bent plate assembly (200) comprises a bent plate (2001), an inner partition plate (2002), two lower panels (2003) and two inner side panels (2004), wherein the bent plate (2001) comprises a bent plate portion and vertical plate portions at both sides of the bent plate portion, the inner partition plate (2002) is connected to inner wall surfaces of the two vertical plate portions, the two inner side panels (2004) are connected at predetermined positions at both lower sides of the inner partition plate (2002), and the two lower panels (2003) are respectively connected between the inner side panels (2004) at both sides and the vertical plate portions.

8. The bogie frame according to claim 7, wherein the inner partition (2002), the two lower plates (2003) and the two inner plates (2004) are connected to form an assembly having both ends longer than the bent plate (2001) for mounting the leading wheel mounting assembly (100) and the pivot housing (500).

9. The bogie frame according to claim 4, wherein the front tug bracket assembly (300) comprises a fixed plate assembly (3001), a first mounting plate (3002) and a second mounting plate set (3003), the fixed plate assembly (3001) being fixedly connected to the bent plate assembly (200); the first mounting plate (3002) is connected to the fixing plate assembly (3001) and used for fixing a tug bracket; the second mounting plate group (3003) is connected to the fixed plate assembly (3001) and is used for connecting a balance beam.

10. A bulldozer, comprising the bogie frame according to any one of claims 4 to 9.

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