CN214837489U - Tensioning device - Google Patents

Abstract

The utility model discloses a tensioning device, which comprises a piston cylinder body, a piston rod, a top plate, a spring and a liquid injection head; the piston rod extends into the piston cylinder body to be connected in a sliding mode, the other end of the piston rod is fixedly connected with a mounting seat, and the spring is sleeved outside the piston rod body; structurally make the spring directly cup joint on the cylinder body with the cylinder body extension, and the one end processing activity cylinder of cylinder body, the liquid passageway has been processed to the cylinder body other end, pours into liquid into the activity intracavity through crossing the liquid passageway, and the drive piston rod removes, and overall structure is compacter, and the volume is littleer, and has replaced the connected mode of original piston rod for it is more stable when using.

Description

Tensioning device

Technical Field

The utility model relates to a tensioning part technical field that the brill car was used, concretely relates to overspeed device tensioner.

Background

A tensioning device is generally arranged on a frame of a drill rig, and the conventional tensioning device generally comprises a cylinder body A, a piston rod B which is slidably connected in the cylinder body A, a support C fixedly connected with the piston rod B, and a spring sleeved on the support, as shown in fig. 1; the tensioning device has large volume, and the piston rod and the bracket are connected to be easy to break to cause accidents; therefore, a stable tensioning device is needed.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a tensioning device to improve device's stability, hoisting device's the firm intensity of use.

In order to achieve the above object, the present invention provides a tensioner, comprising;

the piston cylinder body is provided with a movable cavity in one end, a liquid passing channel for injecting liquid is formed in the other end of the piston cylinder body, the liquid passing channel is communicated with the movable cavity, and a raised shaft shoulder is formed on the outer wall of the piston cylinder body at one end with the movable cavity;

one end of the piston rod is connected in the movable cavity in a sliding mode, so that the piston rod slides in the movable cavity, the other end of the piston rod freely extends out, and a mounting seat is fixedly connected to the freely extending end;

the top plate is sleeved on the piston cylinder body at one end far away from the shaft shoulder part, and a limiting plate for preventing the top plate from being separated is fixedly connected to the end face of the outer side of the top plate;

the spring is arranged between the shaft shoulder and the top plate and sleeved on the piston cylinder body;

and the liquid injection head is fixedly connected to the piston cylinder body close to one end of the top plate and communicated with the liquid passing channel.

Further, a conical surface is machined on one end, close to the mounting seat, of the shaft shoulder.

The beneficial effects of the utility model are embodied in: the utility model discloses structurally make the spring directly cup joint on the cylinder body with the cylinder body extension, and the one end processing activity cylinder of cylinder body, the liquid passageway has been processed to the cylinder body other end, injects liquid into the activity intracavity through passing the liquid passageway, and the drive piston rod removes, and overall structure is compacter, and the volume is littleer, and has replaced the connected mode of original piston rod for it is more stable when using.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a structural view of a conventional tensioner;

fig. 2 is a cross-sectional structural view of a tensioning device according to an embodiment of the present invention.

In the attached drawing, a liquid injection head 1, a top plate 2, a spring 3, a piston cylinder body 4, a piston rod 5, a mounting seat 6, a shaft shoulder 7, a movable cavity 8, a liquid passing channel 9 and a limiting ring 10.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

As shown in fig. 2, an embodiment of the present invention is: a tensioning device comprises a piston cylinder body 4, wherein a movable cavity 8 is formed in one end of the piston cylinder body 4, a liquid passing channel 9 for liquid injection is formed in the other end of the piston cylinder body 4, the liquid passing channel 9 is communicated with the movable cavity 8, and a raised shaft shoulder 7 is formed on the outer wall of the piston cylinder body 4 with one end of the movable cavity 8; a piston rod 5 is connected in the movable cavity 8 in a sliding manner, the piston rod 5 is in clearance fit with the movable cavity 8, one end of the piston rod 5 freely slides in the movable cavity 8, the other end of the piston rod 5 freely extends out, and a mounting seat 6 is fixedly connected to the freely extending end, wherein the mounting seat 6 is fixedly connected to a frame of the drill carriage; a top plate 2 is movably sleeved on the piston cylinder body 4 far away from one end of the shaft shoulder part 7, in order to prevent the top plate 2 from being separated from the piston cylinder body 4, a limiting ring 10 is connected to the end surface of the outer side of the top plate 2, the limiting ring 10 is fixedly connected to the piston cylinder body 4 to form a protruding part, the protruding part is used for blocking the separation of the top plate 2, an elastic area is formed between the top plate 2 and the shaft shoulder part 7, and a spring 3 is arranged in the elastic area; the tail end of the piston cylinder 4 is also fixedly connected with an injection head 1, and the injection head 1 is communicated with a liquid passing channel 9, so that the piston rod 5 is driven to move by injecting liquid through the injection head 1; therefore, the device has compact structure and smaller volume, and replaces the original connection mode of the piston rod 5, so that the device is more stable in use.

Furthermore, a conical surface is processed at one end of the shaft shoulder part 7 close to the mounting seat 6, and the structural strength of the shaft shoulder part 7 is ensured through the arrangement of the conical surface.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (2)

1. A tensioner, comprising:

the piston cylinder body is provided with a movable cavity in one end, a liquid passing channel for injecting liquid is formed in the other end of the piston cylinder body, the liquid passing channel is communicated with the movable cavity, and a raised shaft shoulder is formed on the outer wall of the piston cylinder body at one end with the movable cavity;

one end of the piston rod is connected in the movable cavity in a sliding mode, so that the piston rod slides in the movable cavity, the other end of the piston rod freely extends out, and a mounting seat is fixedly connected to the freely extending end;

the top plate is sleeved on the piston cylinder body at one end far away from the shaft shoulder part, and a limiting plate for preventing the top plate from being separated is fixedly connected to the end face of the outer side of the top plate;

the spring is arranged between the shaft shoulder and the top plate and sleeved on the piston cylinder body;

and the liquid injection head is fixedly connected to the piston cylinder body close to one end of the top plate and communicated with the liquid passing channel.

2. A tensioner as claimed in claim 1, wherein the shoulder portion has a tapered surface formed at an end thereof adjacent the mounting block.

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