CN213541031U - Hydraulic nut - Google Patents

Abstract

The utility model discloses a hydraulic nut in the technical field of hydraulic nut, which comprises an upper pressure cap and a lower pressure cap, wherein the lower pressure cap is clamped at the bottom of the upper pressure cap, the right side of the top of the upper pressure cap is provided with a first screw hole, the inner cavity of the first screw hole is screwed with a quick coupling, the left side of the top of the upper pressure cap is provided with a second screw hole, a sealing ball is placed at the bottom of the inner cavity of the second screw hole, the inner cavity of the second screw hole is positioned at the upper side of the sealing ball and is screwed with an installation part, a clamping groove is arranged on the periphery of the bottom of the upper pressure cap, an outer clamping groove is arranged on the periphery of the outer side wall of the lower pressure cap, the hydraulic nut has reasonable structural design, the quick coupling on the right side of the top of the upper pressure cap is connected through an oil pipe, the upper pressure cap and the lower pressure cap carry out reverse motion through pressurization, thereby completing the pulling-up of, convenient to use, the security is high, has improved the tensile efficiency of the pretension of bolt and nut.

Description

Hydraulic nut

Technical Field

The utility model relates to a hydraulic nut technical field specifically is a hydraulic nut.

Background

Bolted joints are considered to be the predominant form of mechanical releasable joints, whereas the most significant failure of conventional bolted joints, particularly large bolted joints, is due to insufficient pretension.

Traditional bolt pretension instrument, the operation is too troublesome, uses inconveniently, and the security is end, and is too troublesome when the pretension of the tensile of bolt and nut is used, reduces work efficiency, for this reason we provide a hydraulic nut.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hydraulic nut to having proposed traditional bolt pretension instrument in solving above-mentioned background art, the operation is too troublesome, uses inconveniently, and at the bottom of the security, too troublesome problem when the pretension of the tensile of bolt and nut is used.

In order to achieve the above object, the utility model provides a following technical scheme: a hydraulic nut comprises an upper pressing cap and a lower pressing cap, wherein the lower pressing cap is clamped at the bottom of the upper pressing cap, a first screw hole is formed on the right side of the top of the upper pressure cap, a quick connector is screwed in the inner cavity of the first screw hole, a second screw hole is formed in the left side of the top of the upper pressing cap, a sealing ball is placed at the bottom of an inner cavity of the second screw hole, an installation part is screwed in the inner cavity of the second screw hole and positioned at the upper side of the sealing ball, a clamping groove is formed in the periphery of the bottom of the upper pressing cap, an outer clamping groove is formed on the periphery of the outer side wall of the lower pressing cap, an outer oil seal is sleeved at the bottom of an inner cavity of the outer clamping groove, an outer sealing ring is sleeved on the inner cavity of the outer clamping groove and positioned on the upper side of the outer oil seal, an inner clamping groove is formed in the periphery of the wall of the inner cavity of the lower pressing cap, an inner oil seal is sleeved at the bottom of an inner cavity of the inner clamping groove, and an inner sealing ring is sleeved on the upper side of the inner oil seal, which is located in the inner clamping groove.

Preferably, the inner cavity wall of the upper pressing cap is provided with internal threads.

Preferably, the mounting member is a hexagon socket head cap screw.

Preferably, the sealing ball is made of steel material.

Preferably, the outer sealing ring and the inner sealing ring are O-shaped.

Preferably, the inner parts of the outer oil seal and the inner oil seal are inlaid with steel wire ropes.

Compared with the prior art, the beneficial effects of the utility model are that: this hydraulic nut, the cooperation through last pressure cap and lower pressure cap is used, press the bottom of cap cover in through the piece down, will go up again and press on the cap installation screw rod, connect the quick-operation joint on last pressure cap top right side through oil pipe, upwards pressurize in the pressure cap, make through the pressurization and go up the pressure cap and carry out reverse motion with the lower pressure cap, thereby accomplish pulling up of screw rod and the pretension of nut, the operation is simple, high durability and convenient use, safety is high, the efficiency of the tensile of bolt and the pretension of nut has been improved.

Drawings

Fig. 1 is a schematic diagram of the explosion structure of the present invention;

FIG. 2 is a front cross-sectional view of the present invention;

fig. 3 is a top view of the present invention.

In the figure: 100. pressing the cap upwards; 110. a first screw hole; 111. a quick connector; 120. a second screw hole; 121. a sealing ball; 122. a mounting member; 130. a card slot; 200. pressing down the cap; 210. an outer clamping groove; 211. an outer oil seal; 212. an outer sealing ring; 220. an inner clamping groove; 221. an inner oil seal; 222. and an inner sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a hydraulic nut, which has the characteristics of simple operation, convenient use, high safety and the like, and please refer to fig. 1-3, comprising an upper pressing cap 100 and a lower pressing cap 200;

referring to fig. 1-3 again, the right side of the top of the upper pressing cap 100 is provided with a first screw hole 110, the inner cavity of the first screw hole 110 is screwed with a quick coupling 111, the left side of the top of the upper pressing cap 100 is provided with a second screw hole 120, the bottom of the inner cavity of the second screw hole 120 is provided with a sealing ball 121, the inner cavity of the second screw hole 120 and the upper side of the sealing ball 121 are screwed with a mounting member 122, the bottom of the upper pressing cap 100 is circumferentially provided with a clamping groove 130, the upper pressing cap 100 is used for mounting the lower pressing cap 200, the first screw hole 110 is used for screwing the quick coupling 111, the quick coupling 111 is used for connecting an oil pipe, the second screw hole 120 is used for screwing the mounting member 122 and the sealing ball 121 for sealing the second screw hole 120, the mounting member 122 is used for extruding the sealing ball 121;

referring to fig. 1-2, an outer clamping groove 210 is formed on a circumference of an outer side wall of a lower pressing cap 200, an outer oil seal 211 is sleeved on a bottom of an inner cavity of the outer clamping groove 210, an outer sealing ring 212 is sleeved on an inner cavity of the outer clamping groove 210 and positioned on an upper side of the outer oil seal 211, an inner clamping groove 220 is formed on a circumference of an inner cavity wall of the lower pressing cap 200, an inner oil seal 221 is sleeved on a bottom of an inner cavity of the inner clamping groove 220, an inner sealing ring 222 is sleeved on an inner cavity of the inner clamping groove 220 and positioned on an upper side of the inner oil seal 221, the lower pressing cap 200 is clamped on a bottom of the upper pressing cap 100, the lower pressing cap 200 is used for being pulled up in cooperation with the upper pressing cap 100, the outer clamping groove 210 is used for installing the outer oil seal 211 and the outer sealing ring 212, the outer oil seal 211 is used for preventing leakage of hydraulic oil outside the lower pressing cap 200, the outer sealing ring 212 is used for, the inner seal ring 222 is used for sealing the inner wall of the lower pressure cap 200.

When the screw rod is pulled up, the outer oil seal 211 and the outer sealing ring 212 are sleeved in the outer clamping groove 210 on the outer wall of the lower pressing cap 200, the inner oil seal 221 and the inner sealing ring 222 are sleeved in the inner clamping groove 220 on the inner wall of the lower pressing cap 200, after the installation is completed, the lower pressing cap 200 is sleeved in the clamping groove 130 at the bottom of the upper pressing cap 100, and then the upper pressing cap 100 is installed on the screw rod, the quick connector 111 on the right side of the top of the upper pressure cap 100 is connected through the oil pipe on the hydraulic device, the pressure is applied to the interior of the upper pressure cap 100, the upper and lower pressure caps 100 and 200 are reversely moved by pressurization, whereby the pulling up of the screw and the pre-tightening of the nut are completed, after the screw rod is pulled up, the mounting piece 122 in the second screw hole 120 on the left side of the top of the upper pressure cap 100 is screwed to relieve pressure, and after the pressure relief is finished, the upper pressure cap 100 is rotated from the screw rod, so that the screw rod is pulled up.

Referring to fig. 1-3, in order to facilitate the installation of the upper cap 100 on the screw, the inner cavity wall of the upper cap 100 is provided with internal threads.

Referring to fig. 1-3 again, in order to prevent rotation of the mounting member 122, the mounting member 122 is a socket head cap screw, and the socket head cap screw has good disassembling and assembling functions and a good assembling function.

Referring to fig. 1-2, in order to achieve a better sealing effect of the sealing ball 121, the sealing ball 121 is made of steel.

Referring to fig. 1-2 again, in order to achieve better sealing effect of the outer sealing ring 212 and the inner sealing ring 222, the outer sealing ring 212 and the inner sealing ring 222 are shaped like an O.

Referring to fig. 1-2 again, in order to prolong the service life of the outer oil seal 211 and the inner oil seal 221, steel cables are embedded inside the outer oil seal 211 and the inner oil seal 221.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (6)

1. A hydraulic nut is characterized in that: the sealing device comprises an upper pressing cap (100) and a lower pressing cap (200), wherein the lower pressing cap (200) is connected with the bottom of the upper pressing cap (100) in a clamped mode, a first screw hole (110) is formed in the right side of the top of the upper pressing cap (100), a quick connector (111) is screwed in an inner cavity of the first screw hole (110), a second screw hole (120) is formed in the left side of the top of the upper pressing cap (100), a sealing ball (121) is placed at the bottom of the inner cavity of the second screw hole (120), a mounting piece (122) is screwed on the upper side of the sealing ball (121) in an inner cavity of the second screw hole (120), a clamping groove (130) is formed in the periphery of the bottom of the upper pressing cap (100), an outer clamping groove (210) is formed in the periphery of the outer side wall of the lower pressing cap (200), an outer oil seal (211) is sleeved at the bottom of the outer clamping groove (210), an inner cavity of the outer clamping groove (210) is positioned on the upper, inner clamping groove (220) have been opened to the inner chamber wall a week of cap (200) down, inner oil blanket (221) have been cup jointed to the inner chamber bottom of inner clamping groove (220), the inner chamber of inner clamping groove (220) just is located inner sealing washer (222) have been cup jointed to the upside of inner oil blanket (221).

2. A hydraulic nut as defined in claim 1, wherein: the inner cavity wall of the upper pressing cap (100) is provided with internal threads.

3. A hydraulic nut as defined in claim 1, wherein: the mounting piece (122) is an inner hexagon bolt.

4. A hydraulic nut as defined in claim 1, wherein: the sealing ball (121) is made of steel materials.

5. A hydraulic nut as defined in claim 1, wherein: the outer sealing ring (212) and the inner sealing ring (222) are O-shaped.

6. A hydraulic nut as defined in claim 1, wherein: and steel wire ropes are embedded in the outer oil seal (211) and the inner oil seal (221).

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