Hydraulic tensioner suitable for various specifications

Abstract

A hydraulic tensioner suitable for various specifications comprises a cylinder body, a supporting sleeve is connected to the lower portion of the cylinder body, a nut sleeve is arranged in the supporting sleeve, a cylinder sleeve is arranged in the cylinder body, a stretching sleeve is arranged in the cylinder sleeve, a connecting hole is machined in the stretching sleeve, and a replaceable bolt sleeve is arranged in the connecting hole. A circle of inwards-concave connecting groove is machined in the side wall of the upper end in the connecting hole, an avoiding opening is machined in the upper portion of the connecting groove, supporting columns are connected to the periphery of the upper portion of the bolt sleeve, and the supporting columns penetrate through the avoiding opening and are clamped into the connecting groove through rotation. Compared with the prior art, the tensioner is suitable for stretching bolts of different specifications by replacing the bolt sleeve, the bolt sleeve and the stretching sleeve are connected in the mode that the supporting column is clamped into the connecting groove, and replacement is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of stretchers, in particular to a hydraulic stretcher suitable for various specifications. Background Art

[0002] The hydraulic tensioner is used for the removal and installation of bolts of wind power equipment. A stretching sleeve is provided in the hydraulic tensioner, and the stretching sleeve is connected to the bolt. At present, the existing hydraulic tensioner can only be applied to the corresponding specifications and models. In order to improve the versatility of the hydraulic tensioner, the stretching sleeve is changed into a replaceable form, such as the Chinese patent with publication number CN206869429U, entitled "A new hydraulic tensioner adapted to bolts of various specifications", which includes a cylinder body, a piston is provided inside the cylinder body, and a stretching head is provided on the center hole of the piston. A threaded hole is machined at the bottom end of the center hole of the stretching head, and the threaded hole and the external thread of the plug are threadedly fixedly connected. A matching threaded hole is machined in the center of the plug, and the matching threaded hole is matched with the bolt to be stretched. By installing different plugs, the tensioner can adapt to the removal and installation of bolts of different specifications. Since the plug and the stretching head are connected by threads, it is not convenient to replace the plug. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a hydraulic tensioner applicable to various specifications in view of the deficiencies of the above-mentioned prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A hydraulic tensioner suitable for various specifications includes a cylinder body, a support sleeve connected to the bottom of the cylinder body, a nut sleeve arranged in the support sleeve, a cylinder sleeve arranged in the cylinder body, a stretching sleeve arranged in the cylinder sleeve, a connecting hole processed in the stretching sleeve, a replaceable bolt sleeve arranged in the connecting hole, a circle of inwardly concave connecting groove processed in the upper end side wall of the connecting hole, an avoidance opening processed above the connecting groove, a support column connected to the periphery above the bolt sleeve, the support column passes through the avoidance opening and is rotated to be clamped into the connecting groove.

[0006] Furthermore, an oil inlet hole is processed on the side surface of the cylinder liner.

[0007] Furthermore, the cylinder body and the cylinder liner are sealed by a sealing ring.

[0008] Furthermore, a cover plate is installed above the cylinder body to block the cylinder liner, and a return spring is provided around the cover plate and the cylinder liner.

[0009] Furthermore, the sides of the nut sleeve and the bolt sleeve are both processed with shifting holes.

[0010] Compared with the prior art, the present invention makes the stretcher suitable for stretching bolts of different specifications by replacing the bolt sleeve, and the bolt sleeve and the stretching sleeve are connected by a support column that is clamped into the connecting groove, which makes replacement easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 It is a top view of the stretch sleeve of the utility model;

[0013] Figure 3 It is a top view of the bolt sleeve of the utility model;

[0014] Among them, 1. cylinder body, 2. support sleeve, 3. nut sleeve, 4. shift hole 1, 5. cylinder liner, 6. oil inlet hole, 7. sealing ring, 8. stretching sleeve, 9. bolt sleeve, 10. connecting groove, 11. avoidance port, 12. support column, 13. shift hole 2, 14. cover plate, 15. reset spring. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below.

[0016] like Figure 1 As shown, a hydraulic tensioner suitable for various specifications includes a cylinder body 1, a support sleeve 2 is connected to the bottom of the cylinder body 1, a nut sleeve 3 is arranged in the support sleeve 2, the nut sleeve 3 is connected to the installed nut, and a shift hole 4 is processed on the side of the nut sleeve 3, and the shift hole 4 is used to screw the nut sleeve 3, a step hole is provided in the cylinder body 1, a cylinder sleeve 5 is installed in the step hole, an oil inlet hole 6 is processed on the side of the cylinder sleeve 5, and hydraulic oil is injected into the step of the step hole through the oil inlet hole 6 to make the cylinder sleeve 5 slide in the cylinder body 1, and the cylinder body 1 and the cylinder sleeve 5 are sealed by a sealing ring 7, one of the sealing rings 7 is installed on the cylinder body 1, and the other sealing ring 7 is installed on the cylinder sleeve 5, a stretching sleeve 8 is provided in the cylinder sleeve 5, a connecting hole is processed in the stretching sleeve 8, a replaceable bolt sleeve 9 is provided in the connecting hole, a threaded hole is processed in the bolt sleeve 9, and the threaded hole is connected to the bolt to be stretched.

[0017] A circle of concave connecting groove 10 is processed on the upper side wall of the connecting hole, and an avoidance opening 11 is processed above the connecting groove 10. A support column 12 is connected to the periphery above the bolt sleeve 9, and the end of the support column 12 is threadedly connected to the bolt sleeve 9. The support column 12 passes through the avoidance opening 11 and is rotated to be snapped into the connecting groove 10.

[0018] like Figure 2 and Figure 3As shown, in this embodiment, four avoidance openings 11 are evenly distributed on the stretching sleeve 8, and four support columns 12 are correspondingly connected to the periphery of the bolt sleeve 9. During the installation process, the support columns 12 pass through the avoidance openings 11 and are turned into the connecting grooves 10.

[0019] A through-hole second 13 is processed on the upper side of the bolt sleeve 8 , and the through-hole second 13 is used for screwing the bolt sleeve 9 .

[0020] A cover plate 14 is installed above the cylinder body 1 to block the cylinder sleeve 5. A return spring 15 is provided around the cover plate 14 and the cylinder sleeve 5. After the stretcher is stretched, the return spring 15 resets the cylinder sleeve 5.

[0021] The present invention is not limited to the embodiments described. Those skilled in the art may make some modifications or changes without departing from the spirit or scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A hydraulic tensioner suitable for various specifications, comprising a cylinder body, a support sleeve connected to the bottom of the cylinder body, a nut sleeve disposed in the support sleeve, a cylinder sleeve disposed in the cylinder body, a stretching sleeve disposed in the cylinder sleeve, a connecting hole machined in the stretching sleeve, and a replaceable bolt sleeve disposed in the connecting hole, characterized in that: A circle of inwardly concave connecting groove is processed on the upper side wall of the connecting hole, and an avoidance opening is processed above the connecting groove. A support column is connected to the periphery above the bolt sleeve, and the support column passes through the avoidance opening and is rotated to be inserted into the connecting groove.

2. The hydraulic tensioner applicable to various specifications according to claim 1, characterized in that: An oil inlet hole is processed on the side surface of the cylinder sleeve.

3. The hydraulic tensioner applicable to various specifications according to claim 1, characterized in that: The cylinder body and the cylinder sleeve are sealed by a sealing ring.

4. The hydraulic tensioner applicable to various specifications according to claim 1, characterized in that: A cover plate is installed above the cylinder body to block the cylinder sleeve, and a return spring is arranged around the cover plate and the cylinder sleeve.

5. The hydraulic tensioner applicable to various specifications according to claim 1, characterized in that: The sides of the nut sleeve and the bolt sleeve are both processed with shifting holes.

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