阅读说明：本技术 一种外置垫块式自动跟随的油缸机械止退机构及方法 (External cushion block type automatic following oil cylinder mechanical stopping mechanism and method ) 是由 庄筱凤 董新锐 李春柱 于 2020-05-09 设计创作，主要内容包括：本发明涉及机械止退自锁和液压油缸止退自锁领域,具体为一种外置垫块式自动跟随的油缸机械止退机构及方法。一种外置垫块式自动跟随的油缸机械止退机构主要包括油缸、止退框架、止退垫板、转轴和转动电机。油缸在加载伸出带压工作时,在油缸承受外部荷载压力的情况下,为了防止油缸由于内泄露或者液压动力系统失效导致油缸无法保持相应顶力而失效回缩,需要可靠的机械止退机构来防止油缸回缩。一种外置垫块式自动跟随的油缸机械止退机构可自动跟随油缸活塞杆的伸出而伸出,并且在油缸伸长的同时,止退垫板会自动弹出防止油缸失效后的过量回缩。当油缸完成工作后需要回缩前,可通过电机或者手动方式先收回弹出的止退垫板,再回缩油缸即可。(The invention relates to the field of mechanical backstop self-locking and hydraulic oil cylinder backstop self-locking, in particular to an external spacer block type automatic following oil cylinder mechanical backstop mechanism and method. An automatic following oil cylinder mechanical retaining mechanism with an external cushion block mainly comprises an oil cylinder, a retaining frame, a retaining cushion plate, a rotating shaft and a rotating motor. When the oil cylinder works under the condition of loading, extending and pressing, and the oil cylinder bears the external load pressure, in order to prevent the oil cylinder from failing to maintain corresponding jacking force and failing to retract due to internal leakage or failure of a hydraulic power system, a reliable mechanical retaining mechanism is needed to prevent the oil cylinder from retracting. An external spacer type automatic following oil cylinder mechanical stopping mechanism can automatically follow the extension of an oil cylinder piston rod to extend, and when an oil cylinder extends, a stopping spacer plate can automatically pop out to prevent excessive retraction after the oil cylinder fails. When the oil cylinder needs to retract after finishing work, the ejected backstop backing plate can be retracted firstly through a motor or in a manual mode, and then the oil cylinder is retracted.)

1. An external cushion block type automatic following oil cylinder mechanical stopping mechanism and a method thereof mainly comprise an oil cylinder (1), a stopping frame (2), a stopping cushion plate (41), a rotating shaft (42) and a rotating motor (43); two sides of the top end of an oil cylinder body (11) of the oil cylinder (1) are welded with limit door frames (14), and a bearing plate (13) is fixedly connected to the upper surface of an oil cylinder piston rod (12) of the oil cylinder (1); a plurality of retaining backing plates (41) are assembled on the retaining frame (41) through rotating shafts (42); the retaining frame (41) penetrates through the limiting portal frame (14) and is fixedly connected with the two sides of the bearing plate (13) through the fixing screw rod (21).

2. The invention adopts the stopping principle that an oil cylinder piston rod (12) of an oil cylinder (1) works stretches out, and a corresponding space is formed between a bearing plate (13) connected to the oil cylinder piston rod (12) and an oil cylinder body (11) of the oil cylinder (1); filling a space between the bearing plate (13) and the cylinder body (11) of the oil cylinder through a plurality of automatically following and popping retaining backing plates (41); when the oil cylinder is failed to retract and retreat, the filled bearing plates (13) are supported between the bearing plates (13) and the oil cylinder body (11), so that the oil cylinder piston rod (12) is prevented from excessively retracting and retreating.

3. In order to realize the functions of automatic following and automatic stopping, the invention is characterized in that an eccentric rotation design is adopted, and a stopping mechanism is automatically driven by an oil cylinder piston rod (12) when an oil cylinder (1) works and extends out; the automatic rotation and ejection of the retaining backing plate (41) is pushed by the elastic force of a plurality of torsion springs (422) sleeved between the rotating shaft (42) and the half shaft sleeve (421) after compression; when the ejected retaining backing plate (41) needs to be reset, the backing plate can be reset by being driven by a rotating motor (43) connected to one end of a rotating shaft (42) or manually rotated by a tool such as a wrench through a nut at the other end of the rotating shaft (42).

4. A circular groove is reserved at the position, corresponding to each backstop backing plate (41), of each rotating shaft (42) according to the thickness of the backstop backing plate (41), and a torsion spring (422) is mounted in each circular groove; then the half shaft sleeve (421) is fixedly connected with the rotating shaft (42); and a plurality of retaining backing plates (41) are sequentially sleeved on the rotating shaft (42) provided with the torsion spring (422) and the half shaft sleeve (421). Then the retaining frame (2) is assembled to form a complete set of backing plate type retaining mechanism.

The technical field is as follows: the invention relates to the field of mechanical backstop self-locking and hydraulic oil cylinder backstop self-locking, in particular to an external spacer block type automatic following oil cylinder mechanical backstop mechanism and method.

Background art:

the oil cylinder is a hydraulic device widely used in industries such as industry, engineering machinery and construction. In many specific working conditions of the oil cylinder application, the oil cylinder mostly needs to provide enough jacking force to realize corresponding action and action of the oil cylinder. Due to the structural characteristics of the oil cylinder and the characteristics of the matched hydraulic power equipment for providing hydraulic power for the oil cylinder, leakage in the oil cylinder caused by damage or failure of a sealing element inside the oil cylinder or incapability of maintaining pressure or leakage of the matched hydraulic power equipment, which results in incapability of providing required jacking force for the oil cylinder, occurs at times. In the working condition that most of oil cylinders are used, when the oil cylinders are loaded, extend out and work under pressure, and the oil cylinders bear external load pressure, the piston rods extending out of the oil cylinders are not allowed to excessively retract and retreat due to leakage in the oil cylinders or the reason of matching hydraulic power equipment.

Therefore, in order to prevent the cylinder from failing to maintain the corresponding jacking force and failing to retract due to internal leakage or failure of a hydraulic power system, a reliable mechanical retaining mechanism is needed to prevent the cylinder from retracting, and corresponding insurance and guarantee are provided. Thereby achieving the purposes of safety, reliability and controllable risk in the using process of the oil cylinder.

The invention content is as follows:

the invention discloses an external spacer type automatic following oil cylinder mechanical stopping mechanism and method in order to meet the requirements of actual working conditions and avoid potential safety hazards.

The invention achieves the purpose by the following technical scheme:

an external cushion block type automatic following oil cylinder mechanical stopping mechanism and a method mainly comprise an oil cylinder (1), a stopping frame (2), a stopping cushion plate (41), a rotating shaft (42) and a rotating motor (43). Two sides of the top end of an oil cylinder body (11) of the oil cylinder (1) are welded with limiting door frames (14), and a bearing plate (13) is fixedly connected to the upper surface of an oil cylinder piston rod (12) of the oil cylinder (1). A plurality of retaining backing plates (41) are assembled on the retaining frame (41) through rotating shafts (42). The retaining frame (41) penetrates through the limiting portal frame (14) and is fixedly connected with the two sides of the bearing plate (13) through the fixing screw rod (21).

The working principle of the invention is as follows:

the invention adopts the stopping principle that the piston rod (12) of the oil cylinder (1) is extended, and a corresponding space is formed between a bearing plate (13) connected to the piston rod (12) of the oil cylinder and the cylinder body (11) of the oil cylinder (1). The space between the bearing plate (13) and the cylinder body (11) of the oil cylinder is filled by a plurality of automatically following and ejecting retaining backing plates (41). When the oil cylinder is failed to retract and retreat, the filled bearing plates (13) are supported between the bearing plates (13) and the oil cylinder body (11), so that the oil cylinder piston rod (12) is prevented from excessively retracting and retreating.

In order to realize the functions of automatic following and automatic stopping, the invention adopts an eccentric rotation design, and a stopping mechanism is automatically driven by an oil cylinder piston rod (12) when an oil cylinder (1) extends out. The automatic rotation and ejection of the retaining backing plate (41) is pushed by the elastic force of a plurality of torsion springs (422) sleeved between the rotating shaft (42) and the half shaft sleeve (421) after compression. When the ejected retaining backing plate (41) needs to be reset, the backing plate can be reset by being driven by a rotating motor (43) connected to one end of a rotating shaft (42) or manually rotated by a tool such as a wrench through a nut at the other end of the rotating shaft (42).

According to the thickness of the retaining backing plate (41), a circular groove is reserved at the corresponding position of each retaining backing plate (41) on the rotating shaft (42), and a torsion spring (422) is installed in each circular groove. Then the half shaft sleeve (421) is connected and fixed with the rotating shaft (42). And a plurality of retaining backing plates (41) are sequentially sleeved on the rotating shaft (42) provided with the torsion spring (422) and the half shaft sleeve (421). Then the retaining frame (2) is assembled to form a complete set of backing plate type retaining mechanism.

The invention has the following beneficial effects:

the invention can effectively prevent the potential safety hazard and the risk caused by the failure retraction of the oil cylinder due to the failure of the oil cylinder to maintain the corresponding jacking force caused by the internal leakage or the failure of the hydraulic power system. The invention has the characteristics of simple structure, reliable stopping, high automation degree and the like, and can effectively ensure the purposes of safety, reliability and controllable risk in the use process of the oil cylinder.

Description of the drawings:

FIG. 1 is a flow chart of the mechanical stopping mechanism and method of an external spacer type automatic following oil cylinder;

FIG. 2 is a schematic view of the arrangement of the anti-backing plate and the rotating shaft.

The specific implementation mode is as follows:

the present invention will now be described in further detail with reference to the accompanying drawings and examples.

The method comprises the following specific implementation steps:

1) the main components and assembly relationship of the invention include a plurality of oil cylinders 1, a retaining frame 2, a retaining backing plate 41, a rotating shaft 42 and a rotating motor 43. Two sides of the top end of an oil cylinder body 11 of the oil cylinder 1 are welded with limit door frames 14, and a bearing plate 13 is fixedly connected to the upper surface of an oil cylinder piston rod 12 of the oil cylinder 1. A plurality of retaining pads 41 are assembled on the retaining frame 41 through a rotation shaft 42. The retaining frame 41 penetrates through the limiting portal 14 and is fixedly connected with the two sides of the bearing plate 13 through the fixing screw rod 21;

2) the retaining principle of the invention utilizes the extension of an oil cylinder piston rod 12 of the oil cylinder 1, and a corresponding space is formed between a bearing plate 13 connected on the oil cylinder piston rod 12 and an oil cylinder body 11 of the oil cylinder 1;

3) when the oil cylinder extends, the oil cylinder piston rod 12 of the oil cylinder 1 extends, the oil cylinder piston rod 12 drives the thrust mechanism to synchronously extend, and when the space between the bearing plate 13 and the oil cylinder body 11 exceeds the thickness of the retaining backing plate 41, the retaining backing plate 41 pushes the backing plate stopper 411 of the supporting leg backing plate 41 to rotate around the rotating shaft 42 to eject under the action of the torsion spring;

4) when the retaining backing plate 41 rotates around the rotating shaft 42 and pops up by 90 degrees, the popped retaining backing plate 41 forms effective mechanical structure support in the space between the bearing plate 13 and the cylinder body 11;

5) if the oil cylinder 1 fails to resist the pressure at the front end of the oil cylinder piston rod 12 due to pressure loss, the oil cylinder cannot generate excessive retraction displacement due to the existence of the plurality of backstop backing plates 41 which are already popped up in the space between the bearing plate 13 and the oil cylinder body 11;

6) in the normal working process of the oil cylinder, the thrust mechanism can automatically extend along with the extension of the oil cylinder and provide corresponding spaces for ejecting the plurality of backstop backing plates 41;

7) when the oil cylinder 1 needs to be decompressed and retracted after working is finished, the reset of the ejected retaining backing plate 41 is driven by a rotating motor (43) connected to one end of a rotating shaft (42) or the ejected retaining backing plate 41 is reset by a nut at the other end of the rotating shaft (42) manually rotated by a tool such as a wrench;

8) after the stopping cushion plate 41 is reset, the oil cylinder 1 is decompressed and retracted again to drive the thrust mechanism to retract, and the automatic following stopping and retracting follow-up actions of the oil cylinder 1 are completed.