CN201166041Y

CN201166041Y - Hydraulic nut

Info

Publication number: CN201166041Y
Application number: CNU200820065610XU
Authority: CN
Inventors: 徐鸣; 殷武咸; 谢国俊; 张正国; 陈云飞
Original assignee: WUHAN HUAHAN HYDRAULIC DRIVING MACHINERY Co Ltd
Current assignee: WUHAN HUAHAN HYDRAULIC DRIVING MACHINERY Co Ltd
Priority date: 2008-02-03
Filing date: 2008-02-03
Publication date: 2008-12-17
Anticipated expiration: 2018-02-03

Abstract

Disclosed is a fastening device, in particular to a hydraulic nut, which comprises a body, a plunger and a screw bolt. The hydraulic nut is characterized in that the bottom of the body is equipped with a locking ring, the locking ring is connected with the body via a connecting component, and the top of the body is equipped with 1-4 cavities which are arranged radially. The hydraulic nut has the advantages that the hydraulic nut not only is convenient in mounting, but also is fine in fastening effect.

Description

A kind of hydraulic nut

Technical field

The utility model relates to a kind of securing means, particularly a kind of hydraulic nut.

Background technique

Nut is the necessary part of scyewed joint, the slip of thread connector for the rigidity, tightness and the anti-loose ability that strengthen scyewed joint and when preventing to be subjected to lateral load, and conventional scyewed joint majority all needs pretension in assembly process.Its tightening tool is generally hand spanner, pneumatic spanner and comparatively advanced hydraulic pressure spanner; When the pretightening force requirement was strict relatively, most employing specific hydraulic were stretched drawbench in advance and are carried out scyewed joint locking.But in the occasion that the dismounting of scyewed joint degree of tightness frequently replaces, the occasion that is difficult for the occasion of installation or removal and does not have dedicated hydraulic to stretch drawbench in advance will reach the fastening locking value of setting for relatively more difficult.

The model utility content

The utility model relates to a kind of securing means, particularly a kind of hydraulic nut.It is not only easy for installation, and fastening effective.

Realize that the utility model purpose technological scheme is: a kind of hydraulic nut, comprise body, plunger and bolt, it is characterized in that: the body bottom is provided with clamp ring, and clamp ring is connected with body by connector element, and bodies top has 1～4 cavity volume of radially arranging.

And be provided with ring shaped oil passage in the body, and an end of seal ring is positioned at the oil duct bottom, and the other end is positioned at the top of clamp ring.

And cavity volume bottom has the hole and is communicated with oil duct, and the ingress is provided with two thread bushs, has push bolt to match with pair thread bushs, in screw-in chamber, cavity volume ingress, is provided with the plunger that is with round section joint ring between cavity volume and the push bolt.

And having at least two oil channel holes that are communicated with oil duct to be arranged on bodies top, countersunk screw is fixed on this aperture with steel ball, the sealing oil channel hole.

And described connector element is the bolt that is with spring, is provided with the return spring hole along the bodies top circumference, and the clamp ring that the bolt that is with spring passes this hole and is arranged on the body bottom is threaded.

And inner body wall has screw thread.

Advantage of the present utility model is: 1. easy for installation, do not need special tool or equipment.2. locking effect is good, can eliminate the gap between the fastening piece after installing.

Description of drawings

Fig. 1 is the sectional view of hydraulic nut plan view.

Fig. 2 is the sectional view at Figure 1A-A place.

Fig. 3 is the sectional view at Figure 1B-B place.

Fig. 4 is the sectional view at Fig. 1 C-C place.

Embodiment

Referring to Fig. 1～4, the utility model is described further below with reference to embodiment.

The utility model relates to a kind of securing means, particularly a kind of hydraulic nut comprises body 1, plunger 5 and push bolt 7, and its distinctive feature is: body 1 bottom is provided with clamp ring 3, clamp ring 3 is connected with body by connector element, and bodies top has 1～4 cavity volume of radially arranging 14.

In oil channel hole 13, inject grease during use, body 1 is spun on connects on the screw rod behind the applying coupling, rotation push bolt 7, push bolt 7 advances plunger 5 in cavity volume 14, with the area compression of cavity volume 14, make grease form high pressure, so the high pressure grease promotes seal ring 2 and clamp ring 3 is moved to the axial direction of nut work spiral shell mosquito, thereby make whole the engagement closely of nut realize fastening locking, eliminate the gap with coupling.

Under the prerequisite that the ultrahigh-pressure hydraulic pump is arranged, can install in the following ways.Body 1 is spun on connects on the screw rod behind the applying coupling, with the ultrahigh-pressure hydraulic pump oil channel hole 13 is carried out oiling, because the ultrahigh-pressure hydraulic pump has made hydraulic oil produce high pressure when oiling, promote clamp ring 3 and move to the axial direction of nut work spiral shell mosquito, therefore need not to rotate push bolt 7 reaches pressurized effect again.

And be provided with ring shaped oil passage 15 in the body 1, and an end of seal ring 2 is positioned at oil duct 15 bottoms, and the other end is positioned at the top of clamp ring 3.

Oil duct 15 is used to deposit grease, and seal ring 2 is arranged between oil duct 15 and the clamp ring 3, and grease is enclosed in the oil duct 15.

Further technological scheme can be that cavity volume 14 bottoms have the hole and are communicated with oil duct 15, the ingress is provided with two thread bushs 6, there is push bolt 7 to match, screws in the chamber, be provided with the plunger 5 that is with round section joint ring 4 between cavity volume 14 and the push bolt 7 from cavity volume 14 ingress with two thread bushs 6.

Adopt two thread bush structures, the precession that retreats and support push bolt 7 of restriction plunger 5.Push bolt 7 inwardly can be promoted plunger 5 advance, make grease produce high pressure, to inner rotary push bolt 7, plunger 5 is by the pressure pushed home of grease.Round section joint ring 4 plays seal action, prevents that grease from spilling between the gap of chamber wall and plunger 5.

And having at least two oil channel holes 13 that are communicated with oil duct 15 to be arranged on body 1 top, countersunk screw 12 is fixed on this aperture with steel ball 11, sealing oil channel hole 13.

Oil channel hole 13 is used for oiling in oil duct 15, during use, countersunk screw 12 is screwed out, and oiling again can stop oiling when the grease horizontal plane is near oil channel hole 13 two oil channel holes 13 in, again with countersunk screw 12 screw-ins.

Further technological scheme also can be that described connector element is the bolt 9 that is with spring 10, is provided with return spring hole 16 along the bodies top circumference, and the bolt 9 that is with spring 10 passes this hole and is threaded with the clamp ring 3 that is arranged on body 1 bottom.

Earlier push bolt 7 is revolved when releasing and move back, plunger 5 also retreats with push bolt 7 because of the dispensing that is subjected to grease pressure, and this moment, oil duct 15 interior greases just no longer were the high pressure greases.Because lose the effect of pressure, clamp ring 3 is moved to body 1 under the effect of spring 10 tension force, breaks away from coupling.

And body 1 inwall has screw thread.

On body 1 inwall screw thread be used for coupling on threads engaged.The shape of screw thread is processed according to the demand of coupling on body 1 inwall.

Claims

1. a hydraulic nut comprises body, plunger and bolt, it is characterized in that: the body bottom is provided with clamp ring, and clamp ring is connected with body by connector element, and bodies top has 1～4 cavity volume of radially arranging.

2. according to claim 1 described a kind of hydraulic nut, it is characterized in that: be provided with ring shaped oil passage in the body, an end of seal ring is positioned at the oil duct bottom, and the other end is positioned at the top of clamp ring.

3. according to claim 1 described a kind of hydraulic nut, it is characterized in that: the cavity volume bottom has the hole and is communicated with oil duct, the ingress is provided with two thread bushs, there is push bolt to match with two thread bushs, screw in the chamber from the cavity volume ingress, be provided with the plunger that is with round section joint ring between cavity volume and the push bolt.

4. according to claim 1 or 2 or 3 described a kind of hydraulic nuts, it is characterized in that: have at least two oil channel holes that are communicated with oil duct to be arranged on bodies top, countersunk screw is fixed on this aperture with steel ball, the sealing oil channel hole.

5. according to claim 1 or 2 or 3 described a kind of hydraulic nuts, it is characterized in that: described connector element is the bolt that is with spring, be provided with the return spring hole along the bodies top circumference, the bolt that is with spring passes this hole and is threaded with the clamp ring that is arranged on the body bottom.

6. according to claim 1 or 2 or 3 described a kind of hydraulic nuts, it is characterized in that: inner body wall has screw thread.