1. The tensioning mechanism assembly comprises a cylinder body and a hydraulic power mechanism arranged on the cylinder body; two ends of the cylinder body are respectively provided with two earring assemblies, and movable joint bearing assemblies are arranged in the two earring assemblies;

the method is characterized in that:

an inner cylinder body is arranged in the cylinder body, and a first cavity is arranged between the cylinder body and the inner cylinder body; a second cavity is arranged in the inner cylinder body, and the end part of the first cavity is communicated with the second cavity; one end of the second cavity is provided with an inflation piston assembly, and the other end of the second cavity is provided with a damping piston assembly; the inflation piston assembly penetrates through the inner cylinder body and the cylinder body and is in transmission connection with the joint bearing assembly; the damping piston assembly is connected with the movable joint bearing assembly; the hydraulic power mechanism is communicated with the first cavity through the connecting pipe assembly.

2. The tensioning mechanism assembly of claim 1, wherein: the hydraulic power mechanism comprises an oil tank and a miniature electric hydraulic station, and the oil tank is communicated with the miniature electric hydraulic station; the connecting pipe assembly comprises a front oil pipe and a rear oil pipe which are connected between the miniature electric hydraulic station and the first cavity.

3. The tensioning mechanism assembly of claim 2, wherein: an oil filling port is formed in the oil tank; and the oil filling port is provided with an inflation port and an oil filling port screw plug.

4. The tensioning mechanism assembly of claim 3, wherein: the inflation piston assembly comprises an inflation piston and an inflation piston rod which are arranged on the inner wall of the inner cylinder body, and a guide sleeve and a lead ring are arranged between the inflation piston rod and the inner cylinder body; the inflation piston is provided with an inflation valve seat and an inflation valve; the second cavity is a compressed nitrogen cavity; the inflation piston rod is connected to an external earring assembly.

5. The tensioning mechanism assembly of claim 4, wherein: the damping piston assembly comprises a damping piston and a damping piston rod which are arranged on the inner wall of the inner cylinder body, and a guide sleeve and a lead ring are arranged between the damping piston rod and the inner cylinder body; the damping piston rod is connected to an external earring assembly.

6. The tensioning mechanism assembly of claim 4 or 5, wherein: all the guide sleeves are provided with shaft seals and hole seals.

Background

The most common tensioning mechanism for vehicle bearings at present is to hydraulically tension the bearing by a single hydraulic tensioner, however, this method has many disadvantages:

defect 1, uneven tension.

A single hydraulic stretcher is used for carrying out hydraulic tensioning on the bearing, the condition of uneven stress is inevitably caused, and potential safety hazards exist.

And 2, the installation is inconvenient.

The diameter of the bearing is thick, the tension force is large, the matched hydraulic stretcher is large in size and heavy in weight, the hydraulic station and the oil tank are installed in a split mode, the installation operation is complex, and more repeated labor is achieved.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a tensioning mechanism assembly, which solves the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

the tensioning mechanism assembly comprises a cylinder body and a hydraulic power mechanism arranged on the cylinder body; two ends of the cylinder body are respectively provided with two earring assemblies, and movable joint bearing assemblies are arranged in the two earring assemblies; the method is characterized in that: an inner cylinder body is arranged in the cylinder body, and a first cavity is arranged between the cylinder body and the inner cylinder body; a second cavity is arranged in the inner cylinder body, and the end part of the first cavity is communicated with the second cavity; one end of the second cavity is provided with an inflation piston assembly, and the other end of the second cavity is provided with a damping piston assembly; the inflation piston assembly penetrates through the inner cylinder body and the cylinder body and is in transmission connection with the joint bearing assembly; the damping piston assembly is connected with the movable joint bearing assembly; the hydraulic power mechanism is communicated with the first cavity through the connecting pipe assembly.

According to the optimized scheme, the hydraulic power mechanism comprises an oil tank and a miniature electric hydraulic station, wherein the oil tank is communicated with the miniature electric hydraulic station; the connecting pipe assembly comprises a front oil pipe and a rear oil pipe which are connected between the miniature electric hydraulic station and the first cavity.

According to the optimized scheme, an oil filling port is formed in the oil tank; and the oil filling port is provided with an inflation port and an oil filling port screw plug.

According to the optimized scheme, the inflation piston assembly comprises an inflation piston and an inflation piston rod which are arranged on the inner wall of the inner cylinder body, and a guide sleeve and a lead ring are arranged between the inflation piston rod and the inner cylinder body; the inflation piston is provided with an inflation valve seat and an inflation valve; the second cavity is a compressed nitrogen cavity; the inflation piston rod is connected to an external earring assembly.

According to the optimized scheme, the damping piston assembly comprises a damping piston and a damping piston rod which are arranged on the inner wall of the inner cylinder body, and a guide sleeve and a lead ring are arranged between the damping piston rod and the inner cylinder body; the damping piston rod is connected to an external earring assembly.

In an optimized scheme, shaft seals and hole seals are arranged on all the guide sleeves.

Due to the adoption of the technology, compared with the prior art, the invention has the beneficial effects that:

the invention has reasonable design, integrates the cylinder body, the oil tank and the hydraulic station into a whole, has convenient operation and improves the production labor efficiency, and meanwhile, the inside and the outside of the damping piston of the cavity are respectively provided with compressed nitrogen and hydraulic oil, thereby having good damping effect, no rigid connection and firm connection after fixation.

Drawings

Fig. 1 is an overall cross-sectional structural diagram of an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples

As shown in fig. 1, the tensioner assembly includes a cylinder 18 and a hydraulic power mechanism mounted on the cylinder 18. Two ends of the cylinder body 23 are respectively provided with two ear ring assemblies 7 and 18, and movable joint bearing assemblies 8 and 16 are arranged in the two ear ring assemblies 7 and 18. The hydraulic power mechanism comprises an oil tank 5 and a miniature electric hydraulic station 1, and the oil tank 5 is communicated with the miniature electric hydraulic station 1. The miniature electric hydraulic station is communicated with the first cavity 13 through the front oil pipe 6 and the rear oil pipe 2. The oil tank is provided with an oil filling port 4, and the oil filling port 4 is provided with an inflation port and an oil filling port plug screw.

An inner cylinder body 19 is arranged in the cylinder body 18, and a first cavity 13 is arranged between the cylinder body 18 and the inner cylinder body 19. The inner cylinder 19 is internally provided with a second cavity 12, and the end part of the first cavity 13 is communicated with the second cavity 12. And an inflation piston assembly is arranged at one end of the second cavity 12, and a damping piston assembly is arranged at the other end of the second cavity. The inflation piston assembly comprises an inflation piston 11 and an inflation piston rod 9 which are arranged on the inner wall of the inner cylinder body, and a guide sleeve and a lead ring are arranged between the inflation piston rod 9 and the inner cylinder body 19. The inflation piston is provided with an inflation valve seat 10 and an inflation valve. The second cavity is a compressed nitrogen cavity. The inflation piston rod is connected to an external earring assembly 7. The inflation piston assembly penetrates through the inner cylinder body and the cylinder body and is in transmission connection with the joint bearing assembly. The damping piston assembly comprises a damping piston 14 and a damping piston rod 15 which are arranged on the inner wall of the inner cylinder body, and a guide sleeve and a lead ring are arranged between the damping piston rod 15 and the inner cylinder body. The damping piston rod 15 is connected to an external earring assembly 17.

The damping piston assembly is connected to the articulating joint bearing assembly. The hydraulic power mechanism is communicated with the first cavity through the connecting pipe assembly.

All the guide sleeves are provided with shaft seals and hole seals. Both the damping piston assembly and the charge piston assembly have shaft seals and bore seals mounted on all of the guide sleeves. In addition, engineers may add O-rings and the like as needed for sealing.

The inside of interior cylinder body is gas filled cavity (pre-filled high pressure nitrogen gas), and the damping piston receives external force impact back under the straining device assembly used circumstances, and the damping piston produces the rebound in the second cavity, compresses its first cavity, and the mechanical energy that produces the displacement that receives the back damping piston of strikeing turns into internal energy storage, treats that the impact that receives turns into mechanical energy again after the internal energy, makes the damping piston move back, and the reciprocal process of energy absorption release just so makes "straining device assembly" possess buffer function. The design ensures that the equipment cannot directly act on the equipment body when being impacted, but is absorbed and converted by the tensioning mechanism assembly and the damping piston, so that the equipment body is better protected, and the whole equipment is more durable, more in function and stronger.

When the device is used, the radial spherical plain bearings are arranged in the earrings at the front end and the rear end, and certain angular deviation is allowed to exist in the installation positions at the two ends.

The invention has reasonable design, integrates the cylinder body, the oil tank and the hydraulic station into a whole, has convenient operation and improves the production labor efficiency, and meanwhile, the inside and the outside of the damping piston of the cavity are respectively provided with compressed nitrogen and hydraulic oil, thereby having good damping effect, no rigid connection and firm connection after fixation.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.