CN108891257A - A kind of fixation device for setting gas cylinder based on CNG car bottom - Google Patents

Abstract

The invention discloses a fixing device based on a gas cylinder installed at the bottom of a CNG passenger car, which comprises two to three crossbeams, the two ends of the crossbeams are fixedly connected to the grooved beams of the frame at the bottom of the passenger car, and are fixedly connected to the sides of the crossbeams There is a gas cylinder upper shelf, and a gas cylinder bottom frame is arranged directly under the gas cylinder upper shelf, and the gas cylinder upper shelf and the gas cylinder bottom frame are connected by three studs, and the gas cylinder is located between the gas cylinder upper shelf and the gas cylinder bottom frame. Optimize and improve the structure of the installation bracket. Through the adjustment of the installation structure of the gas cylinder, the effective and reliable fixing effect on the bottom gas cylinder can be achieved, and the gas cylinder can be effectively prevented from falling off due to a broken bracket, which improves safety and simplifies the production process. , It is convenient for later maintenance, and makes the whole vehicle more beautiful, and has achieved good results.

Description

A Fixing Device Based on CNG Bus Bottom Gas Cylinders

technical field

The invention relates to a gas cylinder installation structure, in particular to a fixing device based on a gas cylinder installed at the bottom of a CNG passenger car, and belongs to the technical field of automobile manufacturing.

Background technique

CNG vehicles refer to the fact that natural gas mainly composed of methane is stored in a gas cylinder similar to a fuel tank in the vehicle under a pressure of about 25MPa, and is used as a vehicle fuel. For passenger cars that use CNG as fuel, because CNG has the characteristics of high pressure, inflammability and explosion when stored on the passenger car, the requirements for the arrangement and installation reliability of CNG cylinders are relatively high, and the safety of the cylinders should be fully considered when arranging. ,reliability. At present, the gas cylinders of CNG buses are generally placed on the top and bottom. The top means that the gas cylinders are arranged on the top of the bus, and the bottom means that the gas cylinders are arranged on the chassis of the bus and fixed through the frame. Bottom-mounted gas cylinders have the advantage of lowering the center of gravity of the passenger car, and compared with the top-mounted gas cylinders, the process of roof work is reduced, which is more conducive to production safety. However, the placement of gas cylinders at the bottom will bring layout difficulties to the originally compact chassis layout. Since the upper side of the chassis frame is the floor and the body frame, the upper side is sealed by the wooden floor, and the gas cylinders cannot be fixed with bolts and nuts from the upper side. It cannot be fixed, and the mounting bolts are tightened from the underside of the gas cylinder unilaterally. The bolts are easy to slip and cannot be disassembled for later maintenance.

Contents of the invention

The technical problem to be solved by the present invention is: to provide a fixing device based on the bottom gas cylinder of a CNG bus, optimize and improve the structure of the mounting bracket, and achieve effective and reliable fixing of the bottom gas cylinder by adjusting the installation structure of the gas cylinder effect, and effectively prevent the gas cylinder from falling off due to a broken bracket, improve safety, simplify the production process, facilitate later maintenance, and make the whole vehicle more aesthetically pleasing, solving the above-mentioned technical problems.

The technical solution of the present invention is: a fixing device based on a gas cylinder mounted at the bottom of a CNG passenger car, which includes two to three crossbeams, the two ends of the crossbeams are fixedly connected to the grooved beams of the frame at the bottom of the passenger car, and on the side of the crossbeams The upper side of the gas cylinder is fixedly connected with the upper frame of the gas cylinder, and the lower frame of the gas cylinder is arranged directly below the upper rack of the gas cylinder. The connection between the upper rack of the gas cylinder and the lower frame of the gas cylinder is connected by three studs. between.

The upper rack of the gas cylinder includes U-shaped groove frame 1, U-shaped groove frame 2, flat plate and arc plate, and three U-shaped groove frames 1 are fixedly connected on the two ends and the middle of the flat plate, and above the middle of U-shaped groove frame 1 The second U-shaped groove frame is fixedly connected, and two upper arc plates are fixedly connected below the flat plate.

The upper arc plate has a W-shaped structure, and there is an arc-shaped concave surface that fits the shape of the gas cylinder below the middle of the upper arc plate. The two ends and the middle top of the upper arc plate are fixedly connected to the bottom surface of the flat plate, and the The top of the concave surface is positioned directly below the U-shaped groove frame two.

The sides of the U-shaped groove frame 1 and the U-shaped groove frame 2 are fixedly connected to the side edges of the beam.

A through hole 1 is provided in the middle of the bottom of the U-shaped groove frame 1, and the through hole 1 passes through the flat plate below, and the through hole 1 is an oblong hole.

The bottom frame of the gas cylinder includes three flat lugs and two lower arc plates, a lower arc plate is fixedly connected between the flat lugs, and two symmetrical rib plates are fixedly connected under the sides between the lower arc plates 1. Two symmetrical rib plates 2 are fixedly connected to the lower side of the lower arc plate and the flat lug, and a through hole 2 is provided in the middle of the flat lug.

The concave surface of the lower arc plate fits with the cylinder surface of the gas cylinder.

The top of the double-ended stud passes through the through hole 1, and three nuts are fixed on the top, one of which is located under the flat plate, and the other two nuts are located above the U-shaped groove frame 1, and the bottom of the double-ended stud passes through the hole 1. Through hole two, there are two nuts at the bottom to fix it.

The beneficial effects of the present invention are: 1. Simple structure and easy installation: this new structure only needs simple gas cylinder racks, gas cylinder underframes, mounting bolts and nuts to fix the gas cylinders on the vehicle frame, which is convenient for installation and solves the problem of Solve the problems of complex structure and cumbersome installation in the traditional installation method; 2. Reliable fixing and high safety: every two gas cylinders are fixed on the frame through 18 fixing points, and will not fail due to a certain fixing point This new structure can ensure that the gas cylinder is firmly installed and has the advantages of high safety; 3. Convenient maintenance in the later period: this new structure uses three nuts to fix the upper end of the double-ended stud, two of which are nuts On the upper side of the installation surface, a nut is on the lower side of the installation surface, which has the characteristics of preventing the bolt from slipping during assembly and disassembly, and facilitates later maintenance; 4. The entire installation structure is more beautiful: the new gas cylinder installation structure is easy to install, It is integrated, the overall effect of the chassis is simpler, more beautiful, and the use effect is very good.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a top view of the present invention;

Fig. 3 is a side view of the present invention;

Fig. 4 is three views of the gas cylinder on the shelf of the present invention;

Fig. 5 is a three-view view of the gas cylinder bottom frame of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings of this specification.

Embodiment 1: As shown in accompanying drawings 1 to 5, a fixing device based on gas cylinders installed at the bottom of a CNG bus includes two to three beams 2, and the two ends of the beams 2 are fixedly connected to the frame groove at the bottom of the bus On the profile beam 1, a gas cylinder upper frame 6 is fixedly connected to the side of the cross beam 2, and a gas cylinder underframe 7 is provided directly below the gas cylinder upper frame 6. Between the gas cylinder upper frame 6 and the gas cylinder underframe 7, three double The head stud 4 is connected, and the gas cylinder 3 is located between the gas cylinder upper frame 6 and the gas cylinder bottom frame 7.

Further, the cylinder upper frame 6 includes a U-shaped groove frame 1 61, a U-shaped groove frame 2 63, a flat plate 62 and an arc plate 65, and three U-shaped groove frames 61 are fixedly connected to the two ends and the middle of the flat plate 62. A U-shaped channel frame 2 63 is fixedly connected above the middle of the U-shaped channel frame 1 61 , and two upper arc plates 65 are fixedly connected below the flat plate 62 .

Further, the upper arc plate 65 has a W-shaped structure, and there is an arc-shaped concave surface 66 that fits the shape of the gas cylinder 3 below the middle of the upper arc plate 65. The two ends and the middle top of the upper arc plate 65 are in line with the flat plate. The bottom surface of 62 is fixedly connected, and the top of the arc-shaped concave surface 66 is positioned directly below the U-shaped groove frame 2 63.

Further, the sides of the first U-shaped channel frame 61 and the second U-shaped channel frame 63 are fixedly connected to the sides of the beam 2 .

Further, a through hole 64 is provided in the middle of the bottom of the U-shaped channel frame 1 61 , the through hole 1 64 passes through the lower plate 62 , and the through hole 1 64 is an oblong hole.

Further, the gas cylinder chassis 7 includes three flat lugs 71 and two lower arc plates 72, and the lower arc plates 72 are fixedly connected between the flat lugs 71, and are fixedly connected under the sides between the lower arc plates 72. There are two symmetrical rib plates 1 74, two symmetrical rib plates 2 73 are fixedly connected to the lower side of the lower arc plate 72 and the flat lug 71, and a through hole 2 75 is provided in the middle of the flat lug 71.

Further, the concave surface of the lower arc plate 72 fits with the cylinder surface of the gas cylinder 3 .

Further, the top of the double-ended stud 4 passes through the through hole 64, and three nuts 5 are fixed on the top, one of the nuts 5 is located below the flat plate 62, and the other two nuts 5 are located above the U-shaped groove frame 61, The bottom of double-ended stud 4 passes through hole 2 75, and two nuts 5 are fixed at the bottom.

The CNG gas cylinder is arranged on the chassis frame of the middle section of the passenger car, the crossbeam 2 is welded on the grooved beam 1 of the chassis frame, and the gas cylinder upper frame 6 is provided with a mounting hole, and the gas cylinder 3 is installed on the gas cylinder upper frame 6 and the cylinder bottom frame 7, the gas cylinder 3 is surrounded by the gas cylinder upper frame 6 and the gas cylinder bottom frame 7, the gas cylinder bottom frame 7 is provided with a mounting hole, and the installation stud 4 is passed through The first through hole 64 and the second through hole 75 of the gas cylinder upper frame 6 and the gas cylinder bottom frame 7 are tightened and fixed with nuts 5, and the upper ends of the studs 4 are fixed with three nuts 5, two of which are on the mounting surface. On the upper side, a nut 5 is on the lower side of the mounting surface, which has the characteristics of preventing the stud 4 from slipping during assembly and disassembly, and facilitates later maintenance.

The parts of the present invention that are not described in detail are known technologies of those skilled in the art. Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (8)

1. A fixing device based on a gas cylinder mounted at the bottom of a CNG bus, characterized in that it comprises two to three beams (2), and the two ends of the beams (2) are fixedly connected to the frame groove beam at the bottom of the bus ( 1), on the side of the crossbeam (2), there is a gas cylinder upper frame (6) fixedly connected, and a gas cylinder bottom frame (7) is provided directly below the gas cylinder upper frame (6), and the gas cylinder upper frame (6) and the gas cylinder The bottle bottom frames (7) are connected by three studs (4), and the gas cylinder (3) is located between the gas bottle upper frame (6) and the gas bottle bottom frame (7). 2. A fixing device based on a gas cylinder installed at the bottom of a CNG passenger car according to claim 1, characterized in that: the gas cylinder rack (6) includes U-shaped groove frame one (61), U-shaped groove frame two ( 63), the flat plate (62) and the arc plate (65), are fixedly connected with three U-shaped groove frames one (61) above the two ends and the middle of the flat plate (62), and above the middle of the U-shaped groove frame one (61) Two U-shaped groove frames (63) are fixedly connected, and two upper arc plates (65) are fixedly connected below the flat plate (62). 3. A fixing device based on a CNG bus bottom-mounted gas cylinder according to claim 2, characterized in that: the upper arc plate (65) is a W-shaped structure, and there is a The arc-shaped concave surface (66) fits the shape of the gas cylinder (3), the two ends and the middle top of the upper arc plate (65) are fixedly connected with the bottom surface of the flat plate (62), and the arc-shaped concave surface (66) The top is directly below the U-shaped groove frame two (63). 4. A fixing device based on a gas cylinder installed at the bottom of a CNG bus according to claim 2, characterized in that: the sides of the first U-shaped groove frame (61) and the second U-shaped groove frame (63) are fixedly connected on the side of the beam (2). 5. A fixing device based on a gas cylinder installed at the bottom of a CNG passenger car according to claim 2 or 4, characterized in that: a through hole (64) is provided in the middle of the bottom of the U-shaped groove frame (61), so that The first through hole (64) passes through the flat plate (62) below, and the first through hole (64) is an oblong hole. 6. A fixing device based on a CNG bus bottom-mounted gas cylinder according to claim 1, characterized in that: the gas cylinder chassis (7) includes three flat lugs (71) and two lower arc plates (72), the lower arc plate (72) is fixedly connected between the flat lugs (71), and two symmetrical rib plates one (74) are fixedly connected under the side between the lower arc plates (72). The arc plate (72) and the lower side of the flat lug (71) are fixedly connected with two symmetrical rib plates two (73), and a through hole two (75) is provided in the middle of the flat lug (71). 7. A fixing device based on a gas cylinder installed at the bottom of a CNG bus according to claim 6, characterized in that: the concave surface of the lower arc plate (72) fits the cylinder surface of the gas cylinder (3). 8. A fixing device based on a CNG bus bottom-mounted gas cylinder according to claim 1, characterized in that: the top of the stud (4) passes through hole one (64), and three studs are fixed on the top Nuts (5), wherein one nut (5) is located below the flat plate (62), and the other two nuts (5) are located above the U-shaped groove frame one (61), and the bottom end of the double-ended stud (4) passes through Through hole two (75), two nuts (5) are fixed at the bottom.