Pushing type hydraulic nut

Abstract

The utility model relates to the technical field of hydraulic nuts, and discloses a pushing type hydraulic nut which is characterized in that a pushing base is installed on the lower portion of a nut top seat in a closed and embedded mode to form a closed oil cylinder structure, an oil pipe connecting seat is arranged on the side of the nut top seat, and a pushing opening type connector structure is adopted. A sealing ball block and a spring are arranged in the oil pipe connecting seat, the sealing ball block is embedded and sealed in the oil inlet opening side of the oil pipe connecting seat under pushing of the spring, the sealing ball block automatically moves backwards to be opened when oil liquid is injected in through punching, and the sealing ball block automatically moves forwards to seal the liquid inlet opening under pushing of the spring and inner side oil pressure after oil flushing work is completed. During pressure relief disassembly and assembly, automatic opening and communication of an oil port can be achieved only by connecting an oil unloading pipe and pushing a sealing ball block through a rotary knob, a connecting screw base is detachably installed in the middle of a nut top base, the connecting screw base can be selected and replaced according to installation requirements, and the device can be installed with bolts with different calibers in a matched mode; and the use flexibility and the universality of the device are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic nuts, in particular to a push-type hydraulic nut. Background Art

[0002] In some occasions in the machinery, metallurgy, petroleum, chemical and other industries, it is necessary to frequently disassemble and tighten bolts and nuts, especially the pre-tightening of high-strength nuts, which is usually achieved by using torque wrenches, hydraulic wrenches, etc. Not only is the tightening operation complicated, but it also requires special stretching tools for installation and pre-tightening. For the convenience of installation, hydraulic nuts are often used for the tightening and installation of such pre-tightened parts. Hydraulic nuts are driven by oil pressure to achieve the connection and tightening of the installation parts, and the tensioning installation of components can be achieved through their own structure. No stretching tools are required during the installation process, and it is easy to disassemble and use. It is widely used in machinery, metallurgy, petroleum, chemical and other industries.

[0003] The pushing part of the hydraulic nut relies on high-pressure oil to provide the pushing and tightening force. The liquid inlet end of traditional hydraulic nuts is mostly equipped with a simple quick-connect structure. After the oil stamping is completed, the interface needs to be manually tightened to close the interface, which is very inconvenient to operate. In addition, since the size of the screw hole on the upper part of the hydraulic nut is fixed, a single hydraulic nut can only be installed with a bolt of a specific size during use, which has high limitations. Therefore, a pushing hydraulic nut is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a push-type hydraulic nut to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a push-type hydraulic nut, comprising: a nut top seat, a push-type base, and a connecting screw seat, wherein the push-type base is sealed and embedded in the lower part of the nut top seat to form a closed oil cylinder structure, an oil pipe connector is provided on the side of the nut top seat, a sealing ball block and a spring are provided inside the oil pipe connector, and the sealing ball block is embedded and sealed in the oil inlet opening side of the oil pipe connector under the push of the spring;

[0006] A screw seat positioning groove is provided in the middle of the nut top seat, and the connecting screw seat is aligned, engaged, and fastened to the inner side of the screw seat positioning groove. A connecting screw hole is provided in the middle of the connecting screw seat.

[0007] Preferably, an annular oil chamber is provided at the lower portion of the nut top seat, the upper portion of the pushing base is movably fitted on the inner side of the annular oil chamber, and a sealing ring is provided on the contact side between the pushing base and the end of the annular oil chamber.

[0008] Preferably, a fitting base pad is provided at the bottom of the pushing base, and the fitting base pad is fixedly installed at the bottom of the pushing base.

[0009] Preferably, an oil supply hole is provided on the side of the annular oil chamber, the oil pipe connector is fixedly connected and installed on the inner side of the oil supply hole, the sealing ball block and the spring are both installed inside the oil pipe connector, and the sealing ball block is engaged with the hemispherical recessed hole inside the oil pipe connector.

[0010] Preferably, the rear of the spring is fixedly connected to a limit rotation block, the limit rotation block is threadedly installed on the inner side of the screw hole at the rear inner side of the oil pipe connector, and the front of the spring is installed in contact with the sealing ball block.

[0011] Preferably, the screw seat positioning groove is opened through the middle of the nut top seat, and positioning protrusions are evenly provided on the outer peripheral side of the connecting screw seat. The connecting screw seat is installed on the inner side of the screw seat positioning groove through the positioning protrusions. A fastening bolt is provided on the upper part of the connecting screw seat, and the connecting screw seat is fixed to the nut top seat through the fastening bolt.

[0012] Preferably, the connecting screw hole is opened through the middle of the connecting screw seat, and screw force holes are evenly arranged on the outer peripheral side of the nut top seat.

[0013] Compared with the prior art, the above technical solution adopted by the present invention has the following technical effects:

[0014] The nut is provided with a push-to-open interface structure. A sealing ball block and a spring are arranged inside the oil pipe joint. The sealing ball block is unidirectionally sealed at the inlet side of the oil pipe joint under the resistance of the spring. When the oil is pressed in, the sealing ball block automatically moves backward to open. After the oil flushing work is completed, the sealing ball block automatically moves forward to close the liquid inlet opening under the push of the spring and the inner oil pressure. When the pressure is relieved and disassembled, it is only necessary to connect the oil unloading pipe and push the sealing ball block by the knob to realize the automatic opening and connection of the oil port. The structure is simple and the operation is convenient. In addition, a split screw hole connection structure is adopted. The connecting screw seat can be detachably installed in the middle of the nut top seat. When in use, the connecting screw seat can be selected and replaced according to the installation needs, so that the device can be installed in conjunction with bolts of different calibers, which greatly improves the flexibility and versatility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 This is a schematic diagram of the overall upper three-dimensional structure of the utility model;

[0017] Figure 2This is a schematic diagram of the overall lower three-dimensional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the installation structure of the connecting screw seat and the nut top seat of the utility model;

[0019] Figure 4 This is a schematic diagram of the overall middle cross-sectional structure of the utility model;

[0020] Figure 5 For the utility model Figure 4 Schematic diagram of the structure of area A.

[0021] Explanation of the accompanying reference numerals: 1. Nut top seat; 2. Push base; 3. Connecting screw seat; 4. Sealing ring; 5. Fitting base gasket; 6. Screw force hole; 7. Oil pipe connector; 8. Sealing ball block; 9. Spring; 10. Limiting rotary block; 11. Connecting screw hole; 12. Screw seat positioning groove; 13. Fastening bolt. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0024] Example

[0025] See also Figure 1-5 The utility model provides a technical solution: a push-type hydraulic nut, comprising: a nut top seat 1, a push base 2 and a connecting screw seat 3, as shown in the attached Figure 4As shown, in order to connect and install with the pushing base 2, an annular oil chamber is provided at the lower part of the nut top seat 1, and the upper part of the pushing base 2 is movably fitted on the inner side of the annular oil chamber to form a closed oil cylinder structure. In order to improve the oil sealing on the connection side, a sealing ring 4 is provided on the contact side of the end of the pushing base 2 and the annular oil chamber. In order to improve the connection stability between the pushing base 2 and the clamping part to prevent the nut from loosening, a fitting bottom pad 5 is provided at the bottom of the pushing base 2. The fitting bottom pad 5 is made of rubber and is fixedly installed on the bottom of the pushing base 2.

[0026] In order to connect and install with external oil supply pipeline, as shown in the attached Figure 4 As shown, an oil pipe connector 7 is provided on the side of the nut top seat 1, and an oil supply hole is provided on the side of the annular oil chamber. The oil pipe connector 7 is fixedly connected and installed on the inner side of the oil supply hole. In order to achieve one-way communication, as shown in the attached Figure 5 As shown, a sealing ball block 8 and a spring 9 are provided inside the oil pipe connector 7. The sealing ball block 8 and the spring 9 are both installed inside the oil pipe connector 7. In order to facilitate the installation and limit of the spring 9, a limited rotary block 10 is fixedly connected to the rear part of the spring 9. The limited rotary block 10 is threadedly installed on the inner side of the screw hole at the rear part of the inner side of the oil pipe connector 7. The front part of the spring 9 is installed in contact with the sealing ball block 8. The sealing ball block 8 is engaged with the hemispherical concave hole inside the oil pipe connector 7 under the push of the spring 9, and adopts a push-to-open interface structure. When the oil is punched in, the sealing ball block 8 automatically moves backward to open. After the oil flushing work is completed, the sealing ball block 8 automatically moves forward to close the liquid inlet opening under the push of the spring 9 and the inner oil pressure. When disassembling and relieving pressure, you only need to connect the oil unloading pipe and push the sealing ball block 8 by the knob to realize the automatic opening and connection of the oil port. The structure is simple and the operation is convenient.

[0027] In order to facilitate the connection and installation of the screw seat 3, as shown in the attached Figure 3 As shown, a screw seat positioning groove 12 is provided in the middle of the nut top seat 1, and the screw seat positioning groove 12 is opened through the middle of the nut top seat 1. In order to facilitate the installation and positioning of the connecting screw seat 3, positioning protrusions are evenly provided on the outer peripheral side of the connecting screw seat 3. The connecting screw seat 3 is installed in the inner side of the screw seat positioning groove 12 through the positioning protrusions. In order to tighten and limit the connecting screw seat 3 after installation, a fastening bolt 13 is provided on the upper part of the connecting screw seat 3. The connecting screw seat 3 is fixed to the nut top seat 1 through the fastening bolt 13. A split screw hole connection structure is adopted, and the connecting screw seat 3 is detachably installed in the middle of the nut top seat 1. When in use, the connecting screw seat 3 can be selected and replaced according to installation needs, so that the device can be installed in conjunction with bolts of different calibers, which greatly improves the flexibility and versatility of the device.

[0028] In order to connect and install with bolts, as shown in the attached Figure 3As shown, a connecting screw hole 11 is provided in the middle of the connecting screw seat 3. The connecting screw hole 11 has various sizes and specifications. The connecting screw hole 11 is opened through the middle of the connecting screw seat 3. In order to facilitate the screwing and tightening of the nut structure, screwing force holes 6 are evenly provided on the outer peripheral side of the nut top seat 1.

[0029] Working principle or structural principle, during installation, first select the connecting screw seat 3 of the appropriate specification according to the bolt size of the fastening part, then fit the connecting screw seat 3 into the inner side of the screw seat positioning groove 12 in the middle of the nut top seat 1, then tighten the installed connecting screw seat 3 by tightening the bolt 13, and complete the selection and installation of the connecting screw seat 3, then use the connecting screw hole 11 to preliminarily screw and tighten the nut as a whole to the upper part of the bolt, then connect the pressurized oil pipe to the upper part of the oil pipe connector 7, and then use the external high-pressure oil pump to drive the pushing base 2 at the lower part of the nut top seat 1, and the oil enters through the open side of the oil pipe connector 7 and is The oil pushes the sealing ball block 8 to move backward and open, allowing the oil to enter the oil chamber inside the nut top seat 1. Driven by the high-pressure oil, the nut top seat 1 moves downward and pushes the lower component structure to pressurize and tighten it. After reaching the pre-tightening pressure, the oil supply is stopped. Without the push of the external oil, the sealing ball block 8 is automatically pushed forward by the spring 9 and the inner oil pressure to close the liquid inlet opening, thereby automatically closing the oil inlet end and completing the installation of the nut. When disassembling to relieve pressure, the end of the oil unloading pipe is screwed and installed on the upper part of the oil pipe connector 7. A push head column is provided inside the oil unloading pipe. After connection, the forward movement of the push head column pushes the sealing ball block 8 to move backward and open, thereby achieving oil pressure relief connection and completing the pressure relief operation.

[0030] In summary, the hydraulic nut adopts a push-to-open interface structure, and a sealing ball block 8 and a spring 9 are provided inside the oil pipe connector 7. The sealing ball block 8 is unidirectionally sealed on the inlet side of the oil pipe connector 7 under the resistance of the spring 9. When the oil is pressed in, the sealing ball block 8 automatically moves backward to open. After the oil flushing work is completed, the sealing ball block 8 is automatically pushed forward by the spring 9 and the inner oil pressure to close the liquid inlet opening. When disassembling and relieving pressure, it is only necessary to connect the oil unloading pipe and push the sealing ball block 8 by turning the knob to realize the automatic opening and connection of the oil port. The structure is simple and easy to operate, and a split screw hole connection structure is adopted. The connecting screw seat 3 can be detachably installed in the middle of the nut top seat 1. When in use, the connecting screw seat 3 can be selected and replaced according to the installation needs, so that the device can be installed in conjunction with bolts of different calibers, which greatly improves the flexibility and versatility of the device.

[0031] Those skilled in the art will appreciate that various combinations and / or combinations of features described in the various embodiments and / or claims of the present invention may be employed, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, various combinations and / or combinations of features described in the various embodiments and / or claims of the present invention may be employed without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. A push-type hydraulic nut, characterized in that: include: A nut top seat (1), a push base (2) and a connecting screw seat (3); the push base (2) is sealed and embedded in the lower part of the nut top seat (1) to form a closed oil cylinder structure; an oil pipe connector (7) is provided on the side of the nut top seat (1); a sealing ball block (8) and a spring (9) are provided inside the oil pipe connector (7); the sealing ball block (8) is embedded and sealed on the oil inlet opening side of the oil pipe connector (7) under the push of the spring (9); A screw seat positioning groove (12) is provided in the middle of the nut top seat (1), and the connecting screw seat (3) is aligned, engaged, and fastened to the inner side of the screw seat positioning groove (12), and a connecting screw hole (11) is provided in the middle of the connecting screw seat (3).

2. The push-type hydraulic nut according to claim 1, characterized in that: An annular oil cavity is provided at the lower portion of the nut top seat (1), and the upper portion of the push base (2) is movably fitted on the inner side of the annular oil cavity. A sealing ring (4) is provided on the contact side between the push base (2) and the end of the annular oil cavity.

3. The push-type hydraulic nut according to claim 2, characterized in that: The bottom of the pushing base (2) is provided with a fitting base pad (5), and the fitting base pad (5) is fixedly installed on the bottom of the pushing base (2).

4. The push-type hydraulic nut according to claim 2, characterized in that: An oil supply hole is provided on the side of the annular oil cavity, the oil pipe connector (7) is fixedly connected and installed on the inner side of the oil supply hole, the sealing ball block (8) and the spring (9) are both installed inside the oil pipe connector (7), and the sealing ball block (8) is engaged with the hemispherical concave hole inside the oil pipe connector (7).

5. The push-type hydraulic nut according to claim 4, characterized in that: The rear of the spring (9) is fixedly connected to a limit rotation block (10), and the limit rotation block (10) is threadedly installed on the inner side of the screw hole at the inner rear part of the oil pipe connector (7), and the front of the spring (9) is installed in contact with the sealing ball block (8).

6. The push-type hydraulic nut according to claim 1, characterized in that: The screw seat positioning groove (12) is opened through the middle of the nut top seat (1), and the outer peripheral side of the connecting screw seat (3) is evenly provided with positioning protrusions. The connecting screw seat (3) is mounted on the inner side of the screw seat positioning groove (12) through the positioning protrusions. The upper part of the connecting screw seat (3) is provided with a fastening bolt (13), and the connecting screw seat (3) is fixedly mounted with the nut top seat (1) through the fastening bolt (13).

7. The push-type hydraulic nut according to claim 6, characterized in that: The connecting screw hole (11) is opened through the middle of the connecting screw seat (3), and the outer peripheral side of the nut top seat (1) is evenly provided with screwing force holes (6).

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