阅读说明：本技术 拖挂车用车底架 (Vehicle bottom frame for trailer ) 是由 谢铁华 于 2019-09-10 设计创作，主要内容包括：本发明公开了一种拖挂车用车底架,属于挂车领域,用于解决。它包括两个平行设置的纵梁和设于两个纵梁之间的若干横梁,若干所述横梁两端分别于两个纵梁固定连接,若干所述横梁上均设置有弧形钢板弹簧,所述弧形钢板弹簧两端均设置有滑套,所述滑套滑动套设于横梁外；还包括纵向连接杆,所述纵向连接杆设于两个纵梁之间,且与两个纵梁平行设置,所述纵向连接杆依次与若干弧形钢板弹簧中部固定连接。本技术方案通过多个钢板弹簧同时通过形变,对瞬时牵引力进行有效缓冲,降低瞬时牵引力对万向节等连接结构造成损伤；同时,当主车停止前行后,车架在惯性作用下也将向主车靠拢,上述方案也能够对主车停止后,挂车的惯性冲击进行有效吸收。(The invention discloses a vehicle underframe for a trailer, belongs to the field of trailers and is used for solving the problem. The steel plate spring comprises two longitudinal beams arranged in parallel and a plurality of cross beams arranged between the two longitudinal beams, wherein two ends of the plurality of cross beams are respectively and fixedly connected with the two longitudinal beams, arc-shaped steel plate springs are arranged on the plurality of cross beams, sliding sleeves are arranged at two ends of the arc-shaped steel plate springs, and the sliding sleeves are sleeved outside the cross beams in a sliding manner; the longitudinal connecting rod is arranged between the two longitudinal beams and arranged in parallel with the two longitudinal beams, and the longitudinal connecting rod is fixedly connected with the middle parts of the plurality of arc-shaped steel plate springs in sequence. According to the technical scheme, the instantaneous traction force is effectively buffered through the simultaneous deformation of the plurality of steel plate springs, so that the damage of the instantaneous traction force to the construction of the universal joints and other connecting structures is reduced; simultaneously, when the main car stops to move ahead, the frame will also draw close to the main car under the inertia effect, and above-mentioned scheme also can be to the main car back that stops, and the inertia of trailer strikes effectively absorbs.)

1. The utility model provides a trailer chassis for trailer, includes two parallel arrangement's longeron and locates a plurality of crossbeams between two longerons, and is a plurality of the crossbeam both ends are respectively in two longeron fixed connection, its characterized in that: the plurality of cross beams are provided with arc-shaped steel plate springs, sliding sleeves are arranged at two ends of each arc-shaped steel plate spring, and the sliding sleeves are sleeved outside the cross beams in a sliding manner;

The longitudinal connecting rod is arranged between the two longitudinal beams and arranged in parallel with the two longitudinal beams, and the longitudinal connecting rod is fixedly connected with the middle parts of the plurality of arc-shaped steel plate springs in sequence.

2. The undercarriage for a trailer of claim 1 wherein: and the two adjacent arc-shaped steel plate springs are arranged in a mirror image mode.

3. The undercarriage for a trailer of claim 2 wherein: and a support sleeve is arranged between the two adjacent arc-shaped steel plate springs and sleeved outside the longitudinal connecting rod, and two ends of the support sleeve are respectively abutted against one side, opposite to the two adjacent arc-shaped steel plate springs.

4. The trailer chassis of claim 3, wherein: and the two arc-shaped steel plate springs positioned on the outer sides are provided with fastening nuts on the outward sides, and the fastening nuts are sleeved on the longitudinal connecting rod in a threaded fit manner.

5. The trailer chassis of claim 4, wherein: the longitudinal beam comprises a beam body and a supporting plate, wherein the beam body is a channel steel, the supporting plate is arranged in the channel steel, and the supporting plate is of a wave structure and is fixedly connected with the channel steel.

6. The trailer chassis of claim 5, wherein: be provided with the draw-in groove on the sliding sleeve, in arc leaf spring both ends embedding draw-in groove, and through round pin axle cooperation rotation connection with the draw-in groove.

Technical Field

The invention belongs to the field of trailers, and particularly relates to a vehicle underframe for a trailer.

Background

A trailer refers to a vehicle that is towed by a car without power drive per se. A combination of a car (truck or tractor, forklift) and one or more trailers. The truck and the tractor are driving sections of the automobile train and are called as main trains.

The slave node towed by the master is called a trailer. The method is an important vehicle type for road transportation, and the transportation by adopting the automobile train is the most effective and simple important means for improving the economic benefit. Has the advantages of rapidness, mobility, flexibility, safety and the like, and can conveniently realize regional transportation.

The total weight of the trailer is borne by itself and is called a full trailer, also referred to as a trailer for short. The vehicle trailer is an unpowered road vehicle which can be normally used only by being towed by an automobile according to the design and technical characteristics and is characterized by being unpowered and independently loaded, and being towed by other vehicles to run.

At present, the joint of a trailer and a vehicle head is usually and directly connected by adopting connecting structures such as universal joints, the instantaneous tension borne by the connecting structures is large when the vehicle head is started to move forwards, and the connecting structures are damaged in the long-time use process.

Disclosure of Invention

The invention aims to provide a trailer chassis for a trailer, which overcomes the defects in the prior art. In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

A vehicle underframe for a trailer comprises two longitudinal beams arranged in parallel and a plurality of cross beams arranged between the two longitudinal beams, wherein two ends of the plurality of cross beams are fixedly connected with the two longitudinal beams respectively;

The longitudinal connecting rod is arranged between the two longitudinal beams and arranged in parallel with the two longitudinal beams, and the longitudinal connecting rod is fixedly connected with the middle parts of the plurality of arc-shaped steel plate springs in sequence.

according to the technical scheme, the longitudinal connecting rod is connected with the main vehicle, the end part of the longitudinal connecting rod is pulled by the main vehicle to drive the main vehicle to move, when the main vehicle starts to move, the longitudinal connecting rod synchronously pulls the middle parts of the plurality of arc-shaped steel plate springs in the pulling process, so that the plurality of steel plate springs are deformed at the same time, and the plurality of steel plate springs are deformed at the same time, so that instantaneous traction force is effectively buffered, and damage of the instantaneous traction force to the universal joints and other connecting joints is reduced; simultaneously, when the main car stops to move ahead, the frame will also draw close to the main car under the inertia effect, and above-mentioned scheme also can be to the main car back that stops, and the inertia of trailer strikes effectively absorbs.

Further inject, it is adjacent two arc leaf spring mirror image settings can effectively cushion two-way atress through the mode of setting up of anti-bent structure.

further inject, it is adjacent be provided with between two arc leaf spring and support the cover, support the cover outside longitudinal tie rod, and both ends support respectively and lean on two adjacent arc leaf spring relative one side, support the cover and lean on two adjacent arc leaf spring, can fix the position between two arc leaf spring, reduce the atress of the tie point between arc leaf spring and the connecting axle when being strikeed, improve overall structure stability.

further inject, be located two in the outside one side of arc leaf spring all is equipped with fastening nut, fastening nut passes through screw-thread fit cover on longitudinal tie rod, and the connecting axle can adopt the screw shaft, can fix a plurality of arc leaf spring's overall arrangement structure through fastening nut.

further inject, the longeron includes roof beam body and backup pad, the roof beam body is the channel-section steel, in the channel-section steel was located to the backup pad, the backup pad is in wave structure and fixed connection and the channel-section steel, through the compound mode of channel-section steel and backup pad, can guarantee to reduce the whole weight of longeron under the structural performance's of longeron the prerequisite.

Further inject, be provided with the draw-in groove on the sliding sleeve, in arc leaf spring both ends embedding draw-in groove, and pass through round pin axle fit rotation with the draw-in groove and be connected, the assembly and disassembly of being convenient for utilizes the maintenance.

Compared with the prior art, the invention effectively buffers the instantaneous traction force by simultaneously deforming the plurality of steel plate springs, and reduces the damage of the instantaneous traction force to the construction of the universal joints and other connecting joints; simultaneously, when the main car stops to move ahead, the frame will also draw close to the main car under the inertia effect, and above-mentioned scheme also can be to the main car back that stops, and the inertia of trailer strikes effectively absorbs.

Drawings

The invention is further illustrated by the non-limiting examples given in the accompanying drawings;

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

the main element symbols are as follows:

Longeron 1, crossbeam 2, arc leaf spring 3, sliding sleeve 4, longitudinal tie rod 5, support cover 6, fastening nut 7, roof beam body 8, backup pad 9, draw-in groove 10.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, a vehicle underframe for a trailer comprises two longitudinal beams 1 arranged in parallel and a plurality of cross beams 2 arranged between the two longitudinal beams 1, wherein two ends of the plurality of cross beams 2 are respectively fixedly connected with the two longitudinal beams 1, the plurality of cross beams 2 are respectively provided with an arc-shaped steel plate spring 3, two ends of the arc-shaped steel plate spring 3 are respectively provided with a sliding sleeve 4, and the sliding sleeves 4 are slidably sleeved outside the cross beams 2; still include longitudinal tie rod 5, longitudinal tie rod 5 is located between two longerons 1, and with two longeron 1 parallel arrangement, longitudinal tie rod 5 in proper order with the 3 middle part fixed connection of a plurality of arc leaf spring.

In the embodiment, the longitudinal connecting rod 5 is connected with the main vehicle, the end part of the longitudinal connecting rod 5 is pulled by the main vehicle to drive the main vehicle to move, when the main vehicle starts to move, the longitudinal connecting rod 5 synchronously pulls the middle parts of the plurality of arc-shaped steel plate springs 3 in the pulling process, so that the plurality of steel plate springs are deformed simultaneously, and the plurality of steel plate springs are deformed simultaneously, so that instantaneous traction force is effectively buffered, and damage of the instantaneous traction force to the connection joints such as universal joints is reduced; simultaneously, when the main car stops to move ahead, the frame will also draw close to the main car under the inertia effect, and above-mentioned scheme also can be to the main car back that stops, and the inertia of trailer strikes effectively absorbs.

In this embodiment, it is adjacent two 3 mirror image settings of arc leaf spring through the mode of setting of anti-bent structure, can effectively cushion two-way atress.

in this embodiment, it is adjacent be provided with between two arc leaf spring 3 and support cover 6, support cover 6 and overlap outside longitudinal tie rod 5, and both ends support respectively and lean on two adjacent arc leaf spring 3 relative one sides, support cover 6 and support and lean on two adjacent arc leaf spring 3, can fix the position between two arc leaf spring 3, reduce the atress of the tie point between arc leaf spring 3 and the connecting axle when receiving the impact, improve overall structure stability.

In this embodiment, be located two in the outside one side of arc leaf spring 3 all is equipped with fastening nut 7, fastening nut 7 overlaps on longitudinal tie rod 5 through screw-thread fit, and the connecting axle can adopt the screw shaft, can fix a plurality of arc leaf spring 3's overall arrangement structure through fastening nut 7.

In this embodiment, longeron 1 includes roof beam body 8 and backup pad 9, roof beam body 8 is the channel-section steel, backup pad 9 is located in the channel-section steel, backup pad 9 is in wave structure and fixed connection and the channel-section steel, through the compound mode of channel-section steel and backup pad 9, can guarantee to reduce the whole weight of longeron 1 under the structural performance's of longeron 1 prerequisite.

In this embodiment, be provided with draw-in groove 10 on the sliding sleeve 4, 3 both ends of arc leaf spring imbed in draw-in groove 10, and through round pin axle fit rotation with draw-in groove 10 and be connected, the assembly and disassembly of being convenient for utilizes the maintenance.

The present invention provides a trailer chassis as described in detail above. The description of the specific embodiments is only intended to facilitate an understanding of the method of the invention and its core ideas. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.