Frame assembly structure of heavy gas tractor

Abstract

The utility model relates to a heavy gas tractor frame assembly structure which comprises a first longitudinal beam and a second longitudinal beam which are oppositely arranged, and a first cross beam assembly, a second cross beam assembly, a third cross beam assembly, a balance shaft cross beam and a tail cross beam assembly are arranged between the first longitudinal beam and the second longitudinal beam respectively. Each of the first cross beam assembly, the second cross beam assembly and the third cross beam assembly comprises an upper L-shaped reinforcing plate, a lower L-shaped reinforcing plate, an upper connecting plate, a middle cross beam and a lower connecting plate; a gas cylinder frame is vertically mounted on the side wall of the first longitudinal beam and the side wall of the second longitudinal beam through a rear gas cylinder mounting support, and one or more groups of natural gas cylinders are sequentially mounted on one side of the gas cylinder frame from top to bottom; a side-arranged gas cylinder mounting bracket is further mounted on one side of the first cross beam assembly, and a natural gas cylinder is fixedly mounted on the gas cylinder mounting bracket. According to the heavy gas tractor frame assembly structure, the strength of a frame is improved, and local stress is reduced; the overall torsional rigidity and bending rigidity of the frame are improved; the whole vehicle weight and cost are reduced, and the fuel economy is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of frame assembly structure, especially a heavy gas tractor frame assembly structure. BACKGROUND

[0002] With the increasingly stringent environmental regulations and the rise of oil prices, more and more vehicles use natural gas as fuel. Among them, the on-board liquefied natural gas becomes an important alternative energy source due to its high energy density and low emission characteristics. Compared with fuel oil tractors, gas tractors have a fuel cost of about 0.4-0.7 yuan per kilometer less than diesel vehicles under the same fuel consumption level due to the price difference between liquefied natural gas and diesel. Gas tractors have become the main models on the domestic market. Due to the number of local gas stations and the price difference of natural gas in different regions, customers have increasingly high requirements for the long endurance mileage of gas tractors. Compared with fuel oil tractors, the large capacity and multiple combination of gas cylinder arrangement increase the chassis weight by about 4 tons, which puts higher requirements on the strength and stiffness design of the frame.

[0003] The existing gas tractor frame assembly generally uses double-layer longitudinal beams and back-to-back cross beams to strengthen the frame assembly as a whole. Although this type of frame assembly structure can meet the strength and stiffness requirements of large capacity and multiple gas cylinder arrangements, the overall frame assembly uses double-layer longitudinal beams and back-to-back cross beam structure design, which increases the overall vehicle weight and cost, has poor fuel economy, and increases the customer's use cost. SUMMARY

[0004] The technical problem to be solved by the utility model is to solve the problems in the above background technology. The utility model provides a heavy gas tractor frame assembly structure. L-shaped reinforcing plates are added near the liquefied natural gas cylinder support installation position and the inner side of the frame longitudinal beam to improve the frame strength and reduce local stress. The L-shaped reinforcing plates are extended to the rear of the frame cross beam to improve the overall torsional stiffness and bending stiffness of the frame. According to the multiple gas cylinder arrangement structure, the frame cross beam position and the cross beam connecting plate length are reasonably adjusted. Through lightweight design of the frame assembly, the overall vehicle weight and cost are reduced, and the fuel economy is improved.

[0005] The utility model discloses a technical scheme that solves its technical problem is adopted: a heavy gas tractor frame assembly structure, including opposite first longitudinal beam and second longitudinal beam, first longitudinal beam with second longitudinal beam between respectively setting first crossbeam assembly, second crossbeam assembly, third crossbeam assembly, balance shaft crossbeam and tail crossbeam assembly, first crossbeam assembly, second crossbeam assembly and third crossbeam assembly all include upper L type reinforcing plate, lower L type reinforcing plate, upper connecting plate, intermediate crossbeam and lower connecting plate, first longitudinal beam section with second longitudinal beam section all are the groove structure of opening, upper L type reinforcing plate is installed respectively in first longitudinal beam inboard upper end with second longitudinal beam inboard upper end, and upper L type reinforcing plate installs upper connecting plate, lower L type reinforcing plate is installed respectively in first longitudinal beam inboard lower end with second longitudinal beam inboard lower end, and lower L type reinforcing plate installs lower connecting plate, and upper connecting plate with lower connecting plate are fixedly connected through intermediate crossbeam, first longitudinal beam side wall with second longitudinal beam side wall are vertically installed gas cylinder frame through rear gas cylinder mounting support, and one group or more groups of natural gas gas cylinder are installed in succession on one side of gas cylinder frame from top to bottom, and the side of first crossbeam assembly still installs side gas cylinder mounting bracket, and natural gas gas cylinder is fixedly installed through the band on gas cylinder mounting bracket.

[0006] Further limit, in the above technical scheme, the interval between the first longitudinal beam and the second longitudinal beam is large at one end and small at the other end.

[0007] Further limit, in the above technical scheme, the interval between the first longitudinal beam and the second longitudinal beam is large at one end and small at the other end.

[0008] Further limit, in the above technical scheme, the interval between the first longitudinal beam and the second longitudinal beam is large at one end and small at the other end.

[0009] Further limit, in the above technical scheme, the interval between the first longitudinal beam and the second longitudinal beam is large at one end and small at the other end.

[0010] Further limit, in the above technical scheme, the interval between the first longitudinal beam and the second longitudinal beam is large at one end and small at the other end.

[0011] Further limit, in the above technical scheme, the interval between the first longitudinal beam and the second longitudinal beam is large at one end and small at the other end.

[0012] Further limit, in the above technical scheme, the interval between the first longitudinal beam and the second longitudinal beam is large at one end and small at the other end.

[0013] The utility model discloses a heavy gas tractor frame assembly structure increases L type reinforcing plate in the vicinity of liquefied natural gas cylinder support installation position and the inside partial of car frame longitudinal beam, promotes the strength of car frame, reduces partial stress, extends L type reinforcing plate to the rear of car frame crossbeam, can promote the overall torsional rigidity and bending rigidity of car frame, according to multiple gas cylinder arrangement structure, reasonably adjusts car frame crossbeam position and crossbeam connecting plate length, reduces the whole car weight and cost through car frame assembly lightweight design, improves fuel economy. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description is only some embodiments recorded in the application, for ordinary skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0015] Figure 1 It is the structural schematic diagram of the utility model;

[0016] Figure 2 It is Figure 1 the structure schematic diagram of first longitudinal beam and second longitudinal beam in Figure 1 ;

[0017] Figure 3 It is Figure 2 the front structure schematic diagram of

[0018] Figure 4 It is Figure 2 the overhead structure schematic diagram of

[0019] Figure 5 It is Figure 1 the structure schematic diagram of upper L type reinforcing plate, lower L type reinforcing plate, upper connecting plate and lower connecting plate in

[0020] Figure 6 It is Figure 5 the structure schematic diagram of upper connecting plate, lower connecting plate and intermediate crossbeam in Figure 1 ;

[0021] Figure 7 It is Figure 5 the structure schematic diagram of upper connecting plate, lower connecting plate and intermediate crossbeam in Figure 2 ;

[0022] Figure 8 It is Figure 6 the front structure schematic diagram of or Figure 7 .

[0023] The reference signs in the drawings are as follows: 1, first longitudinal beam, 2, second longitudinal beam, 3, first cross beam assembly, 4, second longitudinal beam, 5, third cross beam assembly, 6, balance shaft cross beam, 7, tail cross beam assembly, 8, upper L-shaped reinforcing plate, 9, lower L-shaped reinforcing plate, 10, upper connecting plate, 11, lower connecting plate, 12, middle cross beam, 13, gas cylinder frame, 14, natural gas cylinder, 15, gas cylinder mounting bracket, 16, weight reduction hole, 17, front traction device, 18, saddle connecting plate, 19, balance shaft reinforcing plate. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clearly understood, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and do not limit the utility model.

[0025] In the present application, the front traction device 17 and the natural gas cylinder 14 are directly purchased from the market according to the specific model and then matched and installed for use. The natural gas cylinder 14 is fixedly installed on the gas cylinder mounting bracket 15 through a bandage; the gas cylinder mounting bracket 15 is provided with a bearing plate at intervals from top to bottom, and the bearing plate is provided with an arc-shaped clamping groove; the natural gas cylinder 14 is placed in the arc-shaped clamping groove to realize limiting and fixing, and then is secondarily fixed through the bandages at both ends; in this way, the natural gas cylinder 14 can be firmly fixed on the gas cylinder mounting bracket 15. The upper connecting plate 10 and the lower connecting plate 11 are both provided with a circular arc concave weight reduction design.

[0026] See Figure 1 In the rear double natural gas cylinder and side-hung natural gas cylinder installation area, the inner side of the frame longitudinal beam is changed from a traditional C-shaped groove lining plate to an upper and lower L-shaped reinforcing plate, and the weight is reduced by more than 20 kg. The rear cylinder fixing frame mounting support fixing bolt is arranged at the overlapping position of the longitudinal beam and the reinforcing plate, so as to reduce the stress concentration of the longitudinal beam and increase the reliability of the connection. The installation position of the side-hung cylinder bracket 15 is lengthened through the upper connecting plate 10 and the lower connecting plate 11 in the first cross beam assembly 3 of the frame, so as to improve the torsional stiffness of the frame and increase the installation reliability of the side-hung cylinder.

[0027] See Figures 2-3The heavy gas tractor frame assembly structure disclosed in the application comprises a first longitudinal beam 1, a second longitudinal beam 2, a first cross beam assembly 3, a second cross beam assembly 4, a third cross beam assembly 5, a balance shaft cross beam 6 and a tail cross beam assembly 7. The first longitudinal beam 1 and the second longitudinal beam 2 of the frame have a section height of 286 mm, a width of 80 mm, a thickness of 8 mm and are made of 610L; the upper L-shaped reinforcing plate 8 and the lower L-shaped reinforcing plate 9 in the two longitudinal beams each have a section of 70 mm X 70 mm, a thickness of 5 mm and are made of 610L. The mounting holes in the two longitudinal beams are standard holes with a hole diameter of 15 mm, a hole spacing of X = 50 mm and Z = 60 mm, and the two longitudinal beams are provided with a weight-reducing hole 16 with a diameter of 50-110 mm, which can be used for the pipeline bundle to pass through the longitudinal beam from the inside to the outside of the longitudinal beam. The application adopts a front wide and rear narrow structure, the front opening width is 940 mm, the rear opening width is 850 mm, the edge of the upper wing surface of the front end longitudinal beam of the frame is cut by 10-20 mm, and the large displacement engine is conveniently installed.

[0028] See Figure 5 The upper L-shaped reinforcing plate 8 and the lower L-shaped reinforcing plate 9 have a starting position at the end of the variable cross section of the frame longitudinal beam and a terminal position at the intermediate position of the second cross beam assembly 4 and the third cross beam assembly 5, which can improve the strength and rigidity of the frame. The third cross beam assembly 5 and the saddle connecting plate 18 share 3-5 fastener mounting holes, which can improve the torsional rigidity of the frame. The balance shaft cross beam 6 is made by casting process, and the balance shaft cross beam 6 and the two longitudinal beams are provided with a balance shaft reinforcing plate 19 therebetween.

[0029] See Figures 6-8 The first cross beam assembly 3, the second cross beam assembly 4 and the third cross beam assembly 5 each comprise two side upper connecting plates 10, two side lower connecting plates 11 and a middle cross beam 12. The upper connecting plate 10 and the lower connecting plate 11 each have a thickness of 8 mm and are made of 610L, and the middle cross beam 12 has a C-shaped structure, a thickness of 5 mm and is made of 610L, the upper wing surface of the middle cross beam 12 is horizontal, the lower wing surface is concave in the middle and inclined on both sides to avoid the transmission shaft jumping. The upper and lower connecting plates of the first cross beam assembly 3 are 100 mm longer than the upper and lower connecting plates of the second cross beam assembly 4, which improves the torsional rigidity of the frame. The second cross beam assembly 4 and the third cross beam assembly 5 have the same overall structure, the edges of the upper connecting plate 10 and the lower connecting plate 11 are provided with a concave arc transition, and the frame is designed to be lightweight by removing redundant materials.

[0030] See Figures 1-8The structure of the heavy gas tractor frame assembly is shown, which comprises oppositely arranged first and second longitudinal beams 1 and 2, first, second, third cross beam assemblies 3, 4 and 5, a balance shaft cross beam 6 and a tail cross beam assembly 7 arranged between the first and second longitudinal beams 1 and 2; the first, second and third cross beam assemblies 3, 4 and 5 each comprise an upper L-shaped reinforcing plate 8, a lower L-shaped reinforcing plate 9, an upper connecting plate 10, a middle cross beam 12 and a lower connecting plate 11; the first and second longitudinal beams 1 and 2 each have an open groove-shaped structure, the upper L-shaped reinforcing plates 8 are respectively arranged at the upper inner ends of the first and second longitudinal beams 1 and 2, the upper L-shaped reinforcing plates 8 are provided with the upper connecting plates 10, the lower L-shaped reinforcing plates 9 are respectively arranged at the lower inner ends of the first and second longitudinal beams 1 and 2, the lower L-shaped reinforcing plates 9 are provided with the lower connecting plates 11, the upper and lower connecting plates 10 and 11 are fixedly connected through the middle cross beam 12, and the side walls of the first and second longitudinal beams 1 and 2 are vertically provided with a gas cylinder frame 13 through a rear gas cylinder mounting support, one or more groups of natural gas cylinders 14 are sequentially arranged on one side of the gas cylinder frame 13 from top to bottom, and a side gas cylinder mounting bracket 15 is arranged on one side of the first cross beam assembly 3, and the natural gas cylinders 14 are fixedly arranged on the side gas cylinder mounting bracket 15 through a binding belt.

[0031] The distance between the first and second longitudinal beams 1 and 2 is large at one end and small at the other end, and the distance between the first and second longitudinal beams 1 and 2 is vertically provided with a weight-reducing hole 16 at the large end, one end of the upper L-shaped reinforcing plate 8 and one end of the lower L-shaped reinforcing plate 9 extend to the distance changing position between the first and second longitudinal beams 1 and 2, the other end of the upper L-shaped reinforcing plate 8 and the other end of the lower L-shaped reinforcing plate 9 extend to the positions between the second and third cross beam assemblies 4 and 5, one end of the first longitudinal beam 1 and one end of the second longitudinal beam 2 are provided with a front traction device 17, the side gas cylinder mounting bracket 15 is arranged at the opposite position of the first cross beam assembly 3, and the outer side walls of the first and second longitudinal beams 1 and 2 are each provided with a saddle connecting plate 18, and the balance shaft cross beam 6 is provided with a balance shaft position reinforcing plate 19 at both ends, which is arranged on the inner walls of the first and second longitudinal beams 1 and 2.

[0032] The heavy gas tractor frame assembly structure of the present application has the following advantages over the conventional frame assembly mechanism: the rear double gas cylinders and the side gas cylinders can be assembled, the structural design redundancy is removed under the premise of meeting the sufficient strength and appropriate rigidity of the frame, and the weight and cost of the frame assembly are optimized.

[0033] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A heavy gas tractor frame assembly structure, characterized by: The utility model provides a kind of natural gas vehicle, including oppositely arranged first longitudinal beam and second longitudinal beam, first longitudinal beam and second longitudinal beam between respectively are provided first crossbeam assembly, second crossbeam assembly, third crossbeam assembly, balance shaft crossbeam and tail crossbeam assembly;First crossbeam assembly, second crossbeam assembly and third crossbeam assembly all include upper L-shaped reinforcing plate, lower L-shaped reinforcing plate, upper connecting plate middle crossbeam and lower connecting plate;The section of first longitudinal beam and second longitudinal beam are all in the form of open channel structure, and the upper L-shaped reinforcing plate is respectively installed on the upper end of the inner side of first longitudinal beam and the upper end of the inner side of second longitudinal beam, and the upper L-shaped reinforcing plate is installed with upper connecting plate;Lower L-shaped reinforcing plate is respectively installed on the lower end of the inner side of first longitudinal beam and the lower end of the inner side of second longitudinal beam;Lower L-shaped reinforcing plate is installed with lower connecting plate;Upper connecting plate and lower connecting plate are fixedly connected by middle crossbeam;The sidewall of first longitudinal beam and the sidewall of second longitudinal beam are vertically installed gas cylinder frame through rear gas cylinder mounting support, and one side of gas cylinder frame is sequentially installed with one or more groups of natural gas cylinders from top to bottom;The side of first crossbeam assembly is also installed with side gas cylinder mounting bracket, and natural gas cylinder is fixedly installed on gas cylinder mounting bracket through binding belt.

2. A heavy gas-tumed vehicle frame assembly structure according to claim 1, characterized in that: The interval between the first longitudinal beam and the second longitudinal beam is large at one end and small at the other end.

3. A heavy-duty gas-towing vehicle frame assembly structure according to claim 2, characterized in that: The interval between the first longitudinal beam and the second longitudinal beam is large at one end and small at the other end.

4. A heavy-duty gas-towing vehicle frame assembly structure according to claim 2, characterized in that: The upper L-shaped reinforcing plate and the lower L-shaped reinforcing plate extend to the interval change between the first longitudinal beam and the second longitudinal beam at one end, and extend to the interval between the second crossbeam assembly and the third crossbeam assembly at the other end.

5. A heavy-duty gaseous-hauling tractor frame assembly structure according to claim 1, characterized by: The first longitudinal beam and the second longitudinal beam are provided with a front traction device at one end.

6. A heavy-duty gaseous-hauling tractor frame assembly structure according to claim 1, characterized by: The gas cylinder mounting bracket is installed at the opposite position of the first crossbeam assembly.

7. A heavy-duty gaseous-hauling tractor frame assembly structure as claimed in claim 1, wherein: The first longitudinal beam and the second longitudinal beam are provided with a saddle connecting plate on the outer sidewall.

8. A heavy-duty gaseous-hauling tractor frame assembly structure according to claim 1, characterized by: The balance shaft crossbeam is provided with a balance shaft reinforcing plate at both ends, which is installed on the inner wall of the first longitudinal beam and the second longitudinal beam respectively.

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