CN218907073U

CN218907073U - Linkage type cat ladder guardrail and trailer drags jar

Info

Publication number: CN218907073U
Application number: CN202222893274.0U
Authority: CN
Inventors: 于得成; 庄红美; 李志�
Original assignee: China Heavy Automobile Group Ji'nan Special Car Co ltd
Current assignee: China Heavy Automobile Group Ji'nan Special Car Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-04-25
Anticipated expiration: 2032-10-31

Abstract

The utility model relates to a linkage type cat ladder guardrail and a trailer towing tank, belonging to the field of tank car safety protection. Its technical scheme does, a linkage cat ladder guardrail, including guardrail subassembly and ladder subassembly, the guardrail subassembly includes two at least pendulum rods of horizontal pole, the upper end of a plurality of pendulum rods all articulates with the horizontal pole, the ladder subassembly includes the vice ladder that main ladder upset can be put down relatively, be connected through the gangbar subassembly between vice ladder and the pendulum rod, the gangbar subassembly includes pull rod and connecting piece, connecting piece rigid connection is on being close to the pendulum rod of ladder subassembly, the one end and the vice ladder of pull rod are articulated, the other end and the connecting piece of pull rod are articulated. The utility model has the beneficial effects that the motion mechanism is optimized, a three-connecting-rod structure is formed, the motion process is more stable, the extra degree of freedom is reduced, the vehicle-mounted vibration is greatly reduced, the driving noise is reduced, the loosening of parts is avoided, the structure is simplified, and the manufacturing and using cost is reduced.

Description

Linkage type cat ladder guardrail and trailer drags jar

Technical Field

The utility model relates to the field of tank car safety protection, in particular to a linkage type ladder stand guardrail and a trailer towing tank.

Background

The top of the tank body of the tank truck is generally provided with one or more manholes for workers to go in and out, and the manholes are used for loading and unloading oil, cleaning and maintaining the inside of the tank body and the like. The staff need climb to jar body top through the cat ladder, and manual guardrail at jar body top of pulling up again, and this kind of overhead operation often has brought certain potential safety hazard for people, has also increased staff's intensity of labour and labor time simultaneously, and secondly ordinary tank car is in order to ensure the trafficability characteristic of vehicle, and the cat ladder is all higher apart from ground, and is very inconvenient from top to bottom.

In this regard, the utility model patent with the application number 201821974690.0 provides a linkage lifting device for a ladder guard rail, in the device, a downward turned ladder is connected with the guard rail through a link mechanism, and the guard rail is driven to lift when the ladder is lowered, however, in the device, a vehicle body, a supporting part of the guard rail, a first rod piece and a second rod piece of the link mechanism, and a rotating part of the ladder are sequentially hinged, so that a four-bar mechanism taking the vehicle body as a frame is formed, when the mechanism moves, the ladder is taken as a unique driving piece, the number of degrees of freedom of the mechanism is not corresponding to the number of the driving pieces according to a mechanical principle, and the movement form cannot be uniquely determined, so that a limiting piece is additionally added in the device, and the structure is complicated; meanwhile, the four-bar mechanism has a limiting part, and because of the uncertainty of the movement of the four-bar mechanism, large vehicle-mounted vibration and noise are generated in the running process of a vehicle, the loose falling off of the hinged part is easy to cause potential safety hazards to road running.

Disclosure of Invention

Aiming at the problems that the existing linkage structure of the ladder stand guardrail is complex and large in vibration along with a vehicle, the utility model provides the linkage ladder stand guardrail which is optimized in structure and is more stable and reliable.

In order to solve the problems, the technical scheme includes that the linkage type cat ladder guardrail comprises a guardrail assembly and a ladder assembly, wherein the guardrail assembly comprises a cross rod and at least two swing rods, the upper ends of the swing rods are hinged with the cross rod, the ladder assembly comprises a main ladder and an auxiliary ladder capable of being turned and placed relative to the main ladder, the auxiliary ladder is connected with the swing rods through a linkage rod assembly, the linkage rod assembly comprises a pull rod and a connecting piece, the connecting piece is rigidly connected to the swing rod close to the ladder assembly, one end of the pull rod is hinged with the auxiliary ladder, and the other end of the pull rod is hinged with the connecting piece. The motion mechanism is optimized, the connecting piece is fixedly connected with the swing rod of the guardrail assembly into a whole, the auxiliary ladder, the pull rod and the swing rod form a three-connecting-rod structure, the motion process is more stable, no extra degree of freedom exists, the vibration on the vehicle is greatly reduced, the driving noise is reduced, the loosening of parts is avoided, the structure is simplified, and the manufacturing and use cost is reduced.

Preferably, the auxiliary ladder is provided with a pull rod connecting piece, the pull rod connecting piece is L-shaped and comprises a fixing part and a hinging part which are perpendicular to each other, the fixing part is connected with the auxiliary ladder, the hinging part is perpendicular to the plane where the auxiliary ladder is located, and the pull rod is hinged at one end of the hinging part far away from the fixing part. The arm of force is prolonged, so that linkage is more labor-saving, and meanwhile, the position of the pull rod is far away from the ladder, so that the action space of personnel during climbing the ladder is avoided.

Preferably, the connecting piece is a triangular plate, one side of the connecting piece is welded and fixed with a swing rod connected with the connecting piece, and the pull rod is hinged at the vertex opposite to the welding side of the connecting piece. The welding length of the connecting piece and the swing rod is improved, so that the connecting piece and the swing rod are fixed more stably, and the stress performance is stronger; the connecting piece cooperates with the pull rod connecting piece to enable the pull rod to avoid the vehicle body structure.

Preferably, the triangular plate is an obtuse triangle, one obtuse edge of the triangular plate is a welding edge, and when the swing rod is in a vertical state, the other obtuse edge is obliquely arranged downwards. The distance between the hinge point of the pull rod and the swing rod is increased, so that the labor is saved.

Preferably, the connector is provided with a number of lightening holes.

Preferably, the hinging point of the pull rod and the auxiliary ladder is set as a point A, the hinging point of the pull rod and the connecting piece is set as a point B, and the turning radius of the point A relative to the main ladder is equal to the turning radius of the point B relative to the lower end of the swing rod. The self angle is unchanged in the motion process of the pull rod, the sudden change of stress caused by the sudden acceleration of the components in the linkage process is avoided, and meanwhile, the motion dead point is avoided.

Preferably, the top of the main ladder is provided with handrails. The safety of personnel when climbing to the ladder assembly top is improved.

On the other hand, the utility model also provides a trailer towing tank, which comprises a tank body, wherein the tank body is provided with the linkage type climbing ladder guardrail, the lower ends of the swing rods are hinged at the top of the tank body, and the main ladder is arranged at the rear part of the tank body.

Preferably, the top of the trailer towing tank is provided with a safety frame, and the lower end of the swing rod is hinged with the safety frame. The guardrail assembly is convenient to install, and the connection strength is improved.

Preferably, a gas spring is arranged between at least one swing rod and the tank body. Stability of the guardrail assembly after lifting is improved.

According to the technical scheme, the utility model has the advantages that: the motion mechanism is optimized, a three-connecting-rod structure is formed, unnecessary degrees of freedom are reduced, the motion form of the mechanism in the linkage process is single, the structure maintainability is good in a fixed state, the vibration on a vehicle is avoided, the noise is reduced, and the loosening of parts is avoided; the connecting piece adopts a triangle plate structure, so that the connecting strength is improved, the length of a force arm is increased, the labor is saved, and the vehicle body structure is avoided; meanwhile, the trailer towing tank provided by the utility model is provided with the linkage type ladder stand guardrail, so that personnel can climb conveniently, and the safety is better.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a specific embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a second embodiment of the present utility model.

Figure 3 is a schematic view of the configuration of a ladder assembly in accordance with embodiments of the utility model.

In the figure: 1. the tank body 2, the cross rod 3, the swing rod 4, the connecting piece 5, the handrail 6, the pull rod 7, the main ladder 71, the main ladder pedal 8, the auxiliary ladder 81, the auxiliary ladder pedal 9, the pull rod connecting piece 10, the gas spring 11 and the safety frame.

Detailed Description

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.

As shown in fig. 1-3, a linkage type ladder stand guardrail comprises a guardrail assembly and a ladder assembly, wherein the ladder assembly and the guardrail assembly are connected through a linkage rod assembly:

the guardrail components are arranged on two sides of the top of an installation main body such as a trailer tank, each side comprises a cross rod 2 and at least two swing rods 3, the lower ends of the swing rods 3 are hinged on the installation main body, and the upper ends of the swing rods are hinged with the cross rod 2;

as shown in fig. 3, the ladder assembly comprises a main ladder 7 and an auxiliary ladder 8, wherein the main ladder 7 comprises two main ladder bars which are arranged in parallel, a plurality of main ladder pedals 71 are arranged between the two main ladder bars, the upper ends of the main ladder bars are fixedly connected with the rear part of the installation main body, handrails 5 are respectively arranged at the tops of the two main ladder bars, the auxiliary ladder comprises a U-shaped auxiliary ladder bar, two ends of the auxiliary ladder bar are respectively hinged to the lower parts of the two main ladder bars, and a plurality of auxiliary ladder pedals 82 are arranged between two vertical parts of the auxiliary ladder bar; the ladder assembly comprises a stowed condition in which the auxiliary ladder 8 is flipped up relative to the main ladder 7 and a deployed condition in which it is flipped down as shown in figure 1;

the linkage rod assembly comprises an auxiliary ladder 8 and a swinging rod 3 which are connected through the linkage rod assembly, the linkage rod assembly comprises a pull rod 6 and a connecting piece 4, the connecting piece 4 is fixedly arranged on the swinging rod 3 which is close to the ladder assembly in the guardrail assembly, a pull rod connecting piece 9 is arranged on one vertical portion of the auxiliary ladder 8, the pull rod connecting piece 9 is L-shaped and comprises a fixing portion and a hinging portion which are perpendicular to each other, the fixing portion is connected with the auxiliary ladder 8, the hinging portion is perpendicular to the plane where the auxiliary ladder 8 is located, one end of the pull rod 6 is hinged to one end of the hinging portion, which is far away from the fixing portion, of the hinging portion, and the other end of the pull rod 6 is hinged to the connecting piece 4.

As shown in fig. 1-3, the connecting piece 4 is an obtuse triangle plate, one obtuse angle side of the connecting piece 4 is welded and fixed with the corresponding swing rod 3, when the swing rod 3 is in a vertical state, the other obtuse angle side is arranged obliquely downwards, the pull rod 6 is hinged at the vertex position of the connecting piece 4 opposite to the welding side, a certain number of lightening holes are formed in the connecting piece 4, one lightening hole is formed in the obtuse angle side connected with the swing rod 3, so that the two ends of the side are welded with the swing rod 3, the middle part is hollowed out, the length of a welding seam is reduced while the total length of the connecting side is ensured, and the welding stress is reduced.

On the other hand, the utility model also provides a trailer towing tank, which comprises a tank body 1 (namely the installation main body), wherein the top of the tank body 1 is provided with a safety frame 11, the safety frame 11 is rectangular and surrounds all manholes at the top of the tank body 1, the tank body 1 is provided with the linkage type ladder rail, the lower ends of a plurality of swing rods 3 of the rail assembly are hinged on the safety frame 11, a main ladder 7 is installed at the rear part of the tank body 1, a gas spring 10 is arranged between one swing rod 3 and the safety frame, and two ends of the gas spring 10 are respectively hinged with the safety frame and the swing rods 3.

When the utility model is used, a worker only needs to turn over and pull down the auxiliary ladder 8 when climbing to drag the tank, the auxiliary ladder 8 pulls the connecting piece 4 and the swing rod 3 through the pull rod 6, the swing rod 3 is pulled up from a nearly horizontal state shown in fig. 1 to a vertical state shown in fig. 2, and then the cross rod 2 is driven to rise.

In the process, the hinge point of the pull rod 6 and the auxiliary ladder 8 is set as a point A, the hinge point of the pull rod 6 and the connecting piece 4 is set as a point B, the turning radius of the point A relative to the main ladder is equal to the turning radius of the point B relative to the lower end of the swing rod 3, namely, the angle of the pull rod 6 is always unchanged in the moving process, so that the movement of the linkage mechanism is stable.

According to the technical scheme, the three-link mechanism has the beneficial effects that the motion mechanism is optimized, a three-link structure is formed, unnecessary degrees of freedom are reduced, the motion form of the mechanism in the linkage process is single, the structure maintainability is good in a fixed state, the vibration along with a vehicle is avoided, the noise is reduced, and the loosening of parts is avoided; the connecting piece adopts a triangle plate structure, so that the connecting strength is improved, the length of a force arm is increased, the labor is saved, and the vehicle body structure is avoided; meanwhile, the trailer towing tank provided by the utility model is provided with the linkage type ladder stand guardrail, so that personnel can climb conveniently, and the safety is better.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a linkage cat ladder guardrail, includes guardrail subassembly and ladder subassembly, guardrail subassembly includes horizontal pole (2) and two at least pendulum rods (3), a plurality of the upper end of pendulum rods (3) all with horizontal pole (2) are articulated, the ladder subassembly includes main ladder (7) and can be relative vice ladder (8) that main ladder (7) upset was put down, vice ladder (8) with be connected through the gangbar subassembly between pendulum rods (3), a serial communication port, the gangbar subassembly includes pull rod (6) and connecting piece (4), connecting piece (4) rigid connection is being close to on pendulum rod (3) of ladder subassembly, the one end of pull rod (6) with vice ladder (8) are articulated, the other end of pull rod (6) with connecting piece (4) are articulated.

2. The linkage type cat ladder guardrail according to claim 1, characterized in that a pull rod connecting piece (9) is installed on the auxiliary ladder (8), the pull rod connecting piece (9) is L-shaped and comprises a fixing portion and a hinging portion which are perpendicular to each other, the fixing portion is connected with the auxiliary ladder (8), the hinging portion is perpendicular to a plane where the auxiliary ladder (8) is located, and the pull rod (6) is hinged to one end, away from the fixing portion, of the hinging portion.

3. The linkage type cat ladder guardrail according to claim 1, characterized in that the connecting piece (4) is a triangular plate, one side of the connecting piece (4) is welded and fixed with the swing rod (3) connected with the connecting piece, and the pull rod (6) is hinged at the vertex opposite to the welding side of the connecting piece (4).

4. A ganged ladder rail according to claim 3, characterized in that the triangular plate is an obtuse triangle, one obtuse side of the triangular plate is a welded side, and when the pendulum rod (3) is in a vertical state, the other obtuse side is inclined downwards.

5. A ganged-type cat ladder rail as claimed in claim 3, characterized in that the connecting piece (4) is provided with a number of lightening holes.

6. The linkage type ladder rail according to any one of claims 1-5, characterized in that a hinge point of the pull rod (6) and the auxiliary ladder (8) is set as a point a, a hinge point of the pull rod (6) and the connecting piece (4) is set as a point B, and a radius of gyration of the point a relative to the main ladder is equal to a radius of gyration of the point B relative to the lower end of the swing rod (3).

7. The ganged-type cat ladder rail of any one of claims 1-5, characterized in that the main ladder top is provided with handrails (5).

8. A trailer towing tank comprising a tank body (1), wherein the tank body (1) is provided with the linkage type ladder rail according to any one of claims 1-6, the lower end of each swing rod (3) is hinged at the top of the tank body (1), and the main ladder (7) is arranged at the rear part of the tank body (1).

9. The trailer tank according to claim 8, characterized in that the top of the trailer tank is provided with a safety frame (11), and the lower end of the swing link (3) is hinged to the safety frame (11).

10. Trailer tank according to claim 9, characterized in that a gas spring (10) is arranged between at least one of the pendulum rods (3) and the safety frame (11).