CN218522915U - Improved hydraulic nut pressure adjusting device - Google Patents

Abstract

The utility model discloses an improved generation hydraulic nut pressure adjustment device, contain adjusting nut, adjusting screw, plunger and oil blanket, adjusting nut connects in hydraulic nut's piston hole soon, adjusting screw connects inside adjusting nut soon, inside adjusting nut is worn to establish by plunger one end, and with adjusting screw looks butt, other end dew is established at adjusting nut outside, and stretch into in the hydraulic pressure oil pocket that the piston hole bottom was equipped with, the oil blanket cover is established on the outer wall that the plunger exposes adjusting nut one end, and inlay in the annular seal groove that is equipped with bottom the piston hole, and inside and outside the oil blanket, the circle corresponds respectively with plunger outer wall and annular seal groove inner wall sealing contact. The utility model discloses the advantage has: the plunger is not required to be grooved to adapt to the assembly of an oil seal, so that the processing difficulty and the manufacturing cost of the plunger are reduced; the oil seal is assembled in the piston hole, so that the erosion effect of hydraulic oil on the oil seal is relieved; the oil seal does not move together with the plunger, so that the problems of poor sealing effect and oil leakage caused by frictional wear of the oil seal are avoided.

Description

Improved generation hydraulic nut pressure adjustment device

Technical Field

The utility model relates to a hydraulic nut technical field, specific saying so relates to an improved generation hydraulic nut pressure adjustment device.

Background

As a novel bolt assembling method, the hydraulic nut is often used for occasions such as bolts needing frequent disassembly and assembly, pre-tightening of oversized bolts, locking of large-sized workpieces and the like. The working principle is that the high-pressure oil pump is used for inputting ultra-high oil into the nut to generate force for pushing the piston, so that the shaft and the shaft sleeve are uniformly connected together under stress. The bearing assembling and disassembling device has the advantages of economy, high efficiency, high assembling precision, no labor consumption for assembling or disassembling the bearing, accuracy, safety, suitability for various vibration, quick rotation, large-capacity equipment, narrow space and the like. Although hydraulic nuts have many advantages, there are some disadvantages, such as: as shown in fig. 1 to 4, an adjusting screw 2 for adjusting the oil pressure of the hydraulic nut passes through the adjusting nut 1, and passes through the adjusting nut 1 and protrudes out of the hydraulic nut body during pressure relief, so that the appearance of the whole hydraulic nut is affected, and an operator may be collided or scratched. In view of this problem, the applicant proposed in 2021.08.30 a pressure adjusting device for a hydraulic nut, as shown in fig. 5 to 7, with the publication number CN215805657U, which ensures that an adjusting screw is always located inside the adjusting nut during the whole oil pressure adjusting process, so as to prevent the adjusting screw from protruding out of the hydraulic nut body, not affecting the appearance of the hydraulic nut, and at the same time, not damaging or scratching the operator.

Although the hydraulic nut pressure adjusting device (see fig. 5 to 7) proposed by the applicant in 2021.08.30 can solve the problems of the hydraulic nut pressure adjusting device shown in fig. 1 to 4 well, it has some other disadvantages, such as: 1) The oil seal installation groove 10 needs to be formed in the plunger 3 to assemble the oil seal 4, so that the plunger 3 is difficult to process and high in manufacturing cost; 2) The oil seal 4 is soaked in the hydraulic oil 9 for a long time, the hydraulic oil 9 can erode the oil seal 4, certain influence is caused on the sealing performance of the oil seal, the sealing effect of the oil seal is poor, and the oil leakage problem is caused; 3) In the pressure adjusting process, the oil seal 4 moves together with the plunger 3 in the hydraulic oil cavity 7, friction can occur between the oil seal 4 and the cavity wall of the hydraulic oil cavity 7, and the oil seal 4 can be worn and deteriorated in sealing effect and further has the oil leakage problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an improved generation hydraulic nut pressure adjustment device for solve the existence among the background art because of need fluting on the plunger assemble the oil blanket, lead to the processing cost to increase, and the oil blanket receive hydraulic oil soak the erosion and with the hydraulic oil chamber wall between the sealed effect variation scheduling problem that frictional wear leads to.

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

the utility model provides an improved generation hydraulic nut pressure adjustment device, contains adjusting nut, adjusting screw, plunger and oil blanket, adjusting nut connects in hydraulic nut's piston hole soon, adjusting screw connects inside adjusting nut soon, inside adjusting nut is worn to establish to plunger one end to with adjusting screw looks butt, the other end dew is established outside adjusting nut to in stretching into the hydraulic pressure oil pocket that piston hole bottom was equipped with, its the oil blanket cover is established the plunger exposes on the outer wall of adjusting nut one end, and inlays and establishes in the annular seal groove that piston hole bottom was equipped with, just inside and outside, circle of oil blanket respectively correspond with the outer wall of plunger reaches the inner wall sealing contact of annular seal groove.

Further, the annular sealing groove is located at the joint of the piston hole and the hydraulic oil cavity and communicated with the piston hole and the hydraulic oil cavity.

Further, the groove diameter D1 of the annular sealing groove close to one side of the plunger is larger than or equal to the cavity diameter D of the hydraulic oil cavity, the groove diameter D2 of the annular sealing groove far away from one side of the plunger is larger than the aperture D of the piston hole, and the aperture D of the piston hole is larger than the cavity diameter D of the hydraulic oil cavity.

Furthermore, the adjusting nut is a T-shaped threaded sleeve with a cross slotted hole at one end and external and internal threads at the other end, the caliber of the end, with the cross slotted hole, of the T-shaped threaded sleeve is smaller than the external diameter of the adjusting screw, and the caliber of the end with the external and internal threads is larger than the external diameter of the adjusting screw.

Furthermore, the adjusting screw is a cylinder with an inner hexagonal hole or an inner cross hole or an inner straight hole at one end and a boss at the other end.

Furthermore, the plunger is an equal-diameter cylinder with one end provided with a conical plug.

Further, the oil seal is a Y-shaped sealing ring which does not move along with the plunger.

Compared with the prior art, the utility model has the advantages that: 1) The plunger is not required to be provided with an oil seal groove to adapt to the assembly of an oil seal, so that the manufacturing process of the plunger is greatly simplified, and the processing difficulty and the manufacturing cost of the plunger are effectively reduced; 2) The oil seal is assembled in the piston hole and is not directly soaked in hydraulic oil, so that the erosion effect of the hydraulic oil on the oil seal can be effectively reduced, and the service life and the sealing effect of the oil seal are prolonged; 3) The oil seal does not move together with the plunger, so that the problems of poor sealing effect and oil leakage caused by frictional wear of the oil seal are avoided.

Drawings

Fig. 1 is a schematic structural view of a conventional first hydraulic nut pressure adjustment device;

FIG. 2 is a schematic illustration of the hydraulic nut pressure adjustment assembly of FIG. 1 without the oil seal;

fig. 3 is a schematic assembly diagram of a first conventional hydraulic nut pressure adjusting device and a hydraulic nut;

FIG. 4 is a schematic cross-sectional view of the piston bore and hydraulic oil chamber of FIG. 3;

FIG. 5 is a schematic structural diagram of a conventional second hydraulic nut pressure adjusting device;

FIG. 6 is a schematic view of the hydraulic nut pressure adjustment assembly of FIG. 5 without the oil seal;

fig. 7 is a schematic view illustrating an assembly of a conventional second hydraulic nut pressure adjusting device with a hydraulic nut;

FIG. 8 is a schematic cross-sectional view of the piston bore and hydraulic oil chamber of FIG. 7;

fig. 9 is a hydraulic nut pressure adjusting device of the present invention;

fig. 10 is an assembly schematic diagram of the hydraulic nut pressure adjusting device and the hydraulic nut according to the present invention;

FIG. 11 is a schematic cross-sectional view of the piston bore and hydraulic oil chamber of FIG. 10;

FIG. 12 is an enlarged view of a portion of FIG. 9;

description of reference numerals: 1. adjusting the nut; 2. adjusting screws; 3. a plunger; 4. oil sealing; 5. a hydraulic nut; 6. a piston bore; 7. a hydraulic oil chamber; 8. an annular seal groove; 9. hydraulic oil; 10. 10, oil seal mounting grooves; 11. and an oil hole.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, how to implement the present invention is further explained below with reference to the accompanying drawings and the detailed description.

Referring to fig. 7 to 10, the utility model provides a pair of improved generation hydraulic nut pressure adjustment device, contain adjusting nut 1, adjusting screw 2, plunger 3 and oil blanket 4, adjusting nut 1 connects soon in hydraulic nut 5's piston hole 6, adjusting screw 2 connects soon inside adjusting nut 1, 1 inside adjusting nut is worn to establish by 3 one end of plunger, and with 2 looks butt of adjusting screw, the other end dew is established in adjusting nut 1 outsidely, and stretch into in the hydraulic pressure oil pocket 7 that 6 bottoms of piston hole were equipped with, 4 covers of oil blanket are established on 3 outer walls that expose 1 one end of adjusting nut of plunger, and inlay in the annular seal groove 8 that is equipped with in 6 bottoms of piston hole, and inside and outside oil blanket 4, the circle corresponds the inner wall sealing contact with outer wall and annular seal groove 8 of plunger 3 respectively.

Specifically, in the present invention, referring to fig. 8 and 9, the annular seal groove 8 is located at the junction between the piston bore 6 and the hydraulic oil chamber 7, and is communicated with the piston bore 6 and the hydraulic oil chamber 7.

More specifically, in the present invention, referring to fig. 9 and 10, a groove diameter D1 of the annular seal groove 8 on the side close to the plunger 3 is greater than or equal to a cavity diameter D of the hydraulic oil cavity 7, a groove diameter D2 of the annular seal groove 8 on the side far from the plunger 3 is greater than a hole diameter D of the piston hole 6, and the hole diameter D of the piston hole 6 is greater than the cavity diameter D of the hydraulic oil cavity 7.

Specifically speaking, the utility model discloses in, adjusting nut 1 has cross slotted hole, the other end to have external screw thread and internal screw thread T type thread bush for one end, and this T type thread bush has the bore of cross slotted hole one end to be less than adjusting screw 2's external diameter, and the bore that has external screw thread and internal thread one end is greater than adjusting screw 2's external diameter. The aperture of one end of the adjusting nut 1 with the cross slotted hole is designed to be smaller than the outer diameter of the adjusting screw 2, so that the adjusting screw 2 is prevented from being screwed out of the adjusting nut 1 and protruding out of the adjusting nut 1 during pressure relief, the appearance of the hydraulic nut 5 is affected, and the body of an operator is threatened, namely the operator is bruised or scratched; the purpose of designing the caliber of the end of the T-shaped threaded sleeve with the external thread and the internal thread to be larger than the external diameter of the adjusting screw 2 is to facilitate the assembling of the adjusting screw 2 into the adjusting nut 1 or the extraction from the adjusting nut 1.

Specifically, the utility model discloses in, adjusting screw 2 can be the cylinder that one end has interior hexagonal hole, the other end has the boss, also can be the cylinder that one end has interior cross hole, the other end has the boss, still can be for one end has interior straight line hole, the other end has the boss. The specific form is selected and designed according to actual needs.

Specifically, in the present invention, the plunger 3 is an equal-diameter cylinder having a tapered plug at one end. During assembly, one end of the plunger 3 without the conical plug is used for abutting against the adjusting screw 2, and the end provided with the conical plug extends into the hydraulic oil cavity 7.

Specifically, in the utility model discloses in, oil blanket 4 is the Y type sealing washer that does not move along with plunger 3, and it specifically inlays to be established in the annular seal groove 8 that is equipped with in the piston bore 6 bottom.

The utility model provides an improved generation hydraulic nut pressure adjustment device's theory of operation is the same basically with current hydraulic nut pressure adjustment device's theory of operation, and the difference only in: when the hydraulic nut is pressurized or decompressed, the oil seal 4 moves in the hydraulic oil chamber 7 along with the plunger 3 in the existing hydraulic nut pressure adjusting device, while the oil seal 4 does not move in the hydraulic oil chamber 7 along with the plunger 3 in the improved hydraulic nut pressure adjusting device, and the design has the advantages that:

(1) The plunger is not required to be grooved (as shown in fig. 2 or fig. 6, an oil seal mounting groove 10 is formed in the plunger 3) so as to be suitable for the assembly of an oil seal, the manufacturing process of the plunger is greatly simplified, and the processing difficulty and the manufacturing cost of the plunger are effectively reduced;

(2) The oil seal is assembled in the piston hole and is not directly soaked in the hydraulic oil, so that the erosion effect of the hydraulic oil on the oil seal can be effectively reduced, and the service life and the sealing effect of the oil seal are prolonged;

(3) The oil seal does not move together with the plunger, so that the problems of poor sealing effect and oil leakage caused by frictional wear of the oil seal are avoided.

When the hydraulic nut is used, when the hydraulic nut needs to be pressurized, the adjusting screw 2 is twisted clockwise (or anticlockwise) through a wrench to be pushed towards the interior of the piston hole 6, hydraulic oil 9 in the hydraulic oil cavity 7 is injected into an annular oil groove of the hydraulic nut 5 through the oil hole 11, and then a pressurizing ring of the hydraulic nut is pushed outwards by the hydraulic oil injected into the annular oil groove, so that the workpiece needing to be fastened is pressed tightly;

when the pressure of the hydraulic nut needs to be relieved, the adjusting screw 2 is twisted anticlockwise (or clockwise) through the wrench to enable the adjusting screw to exit towards the outside of the piston hole 6, so that hydraulic oil 9 in the annular oil groove of the hydraulic nut 5 flows back into the hydraulic oil cavity 7 through the oil hole 11, and in the process that the hydraulic oil 9 in the annular oil groove flows back into the hydraulic oil cavity 7, the pressurizing ring pressed on the annular oil groove returns to the initial position, and the locking effect on a fastened workpiece is released.

Finally, the above description is only the embodiments of the present invention, and not the scope of the present invention is limited thereby, and all the equivalent structures or equivalent processes that are made by the contents of the specification and the drawings of the present invention can be used directly or indirectly in other related technical fields, and all the same principles are included in the scope of the present invention.

Claims (7)

1. The utility model provides an improved generation hydraulic nut pressure adjustment device, contains adjusting nut (1), adjusting screw (2), plunger (3) and oil blanket (4), adjusting nut (1) connects soon in piston hole (6) of hydraulic nut (5), adjusting screw (2) connect soon inside adjusting nut (1), inside adjusting nut (1) is worn to establish by plunger (3) one end to with adjusting screw (2) looks butt, the other end dew is established in adjusting nut (1) outside, and stretch into in hydraulic pressure oil pocket (7) that piston hole (6) bottom was equipped with, its characterized in that: the oil blanket (4) cover is established on plunger (3) exposes on the outer wall of adjusting nut (1) one end to inlay and establish in annular seal groove (8) that piston hole (6) bottom was equipped with, just inside and outside, the circle of oil blanket (4) correspond respectively with the outer wall of plunger (3) reaches the inner wall sealing contact of annular seal groove (8).

2. The improved hydraulic nut pressure adjustment device of claim 1, wherein: the annular sealing groove (8) is located at the joint of the piston hole (6) and the hydraulic oil cavity (7) and communicated with the piston hole (6) and the hydraulic oil cavity (7).

3. The improved hydraulic nut pressure regulating device according to claim 1 or 2, wherein: the groove diameter D1 of one side of the annular sealing groove (8) close to the plunger (3) is larger than or equal to the cavity diameter D of the hydraulic oil cavity (7), the groove diameter D2 of one side of the annular sealing groove (8) far away from the plunger (3) is larger than the aperture D of the piston hole (6), and the aperture D of the piston hole (6) is larger than the cavity diameter D of the hydraulic oil cavity (7).

4. The improved hydraulic nut pressure adjustment device of claim 3, wherein: the adjusting nut (1) is a T-shaped threaded sleeve with one end provided with a cross slotted hole and the other end provided with external threads and internal threads, the caliber of one end of the T-shaped threaded sleeve with the cross slotted hole is smaller than the external diameter of the adjusting screw (2), and the caliber of one end with the external threads and the internal threads is larger than the external diameter of the adjusting screw (2).

5. The improved hydraulic nut pressure adjustment device of claim 3, wherein: the adjusting screw (2) is a cylinder with one end provided with an inner hexagonal hole or an inner cross hole or an inner straight hole and the other end provided with a boss.

6. The improved hydraulic nut pressure adjustment device of claim 3, wherein: the plunger (3) is an equal-diameter cylinder with a conical plug head at one end.

7. The improved hydraulic nut pressure regulating device of claim 3, wherein: the oil seal (4) is a Y-shaped sealing ring which does not move along with the plunger (3).

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