CN210586967U

CN210586967U - Hydraulic riveting tool

Info

Publication number: CN210586967U
Application number: CN201920915704.XU
Authority: CN
Inventors: 余涛; 赵祥云; 李伟; 郭龙; 杨林; 李坤; 张帅
Original assignee: Meishan CRRC Fastening System Co Ltd
Current assignee: Meishan CRRC Fastening System Co Ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-05-22
Anticipated expiration: 2029-06-18

Abstract

The utility model discloses a hydraulic pressure riveting tool. The riveting device comprises a shell and a riveting main shaft driven by hydraulic oil in the shell, wherein the main shaft is directly driven by two stages of oil cylinders connected in series; the two-stage oil cylinder is composed of an oil inlet cylinder and an oil return cylinder, the oil inlet cylinder is connected with a secondary progressive oil cylinder which is communicated in series, and the oil return cylinder is connected with a secondary oil return cylinder which is communicated in series. The utility model discloses riveting tool adopts little cylinder diameter double-cylinder structure, adopts the double-cylinder structure to reduce whole cylinder diameter, the narrow and small region in adaptable more space, like the riveting of interval narrow and small interval between the concave type steel. By adopting a double-cylinder structure, the actual driving pressure area is increased, the driving force can be further increased under the same input condition, and the better working state under the low input condition is ensured. The utility model discloses a serial-type double-cylinder structure to further optimize system architecture, under the same input or output condition, can reduce the whole volume of instrument by a great margin, improve efficiency.

Description

Hydraulic riveting tool

Technical Field

The utility model belongs to the technical field of the riveting tool design, especially, belong to a rivet nail riveting extracting tool for connecting composite sheet or metal sheet, belong to metal machining's riveting class (B21J) and fastener class (F16B).

Background

In the riveting process, the riveting tool inevitably encounters the problems of limited riveting space, insufficient working oil pressure supply and the like. Especially, when the riveting tool is needed to finish the riveting and disassembling of a narrow station, for example, the distance between the concave steel and a certain plane is smaller than the cylinder diameter of the normal riveting tool, the normal riveting tool cannot be used to finish the riveting and fixing of the concave steel and the plane, and the requirement cannot be met. In addition, when some working oil pressure is not supplied enough, in order to meet the normal output of the riveting force, the power output of an oil cylinder needs to be increased, and the existing riveting tool can not meet the requirement.

Disclosure of Invention

The utility model discloses a hydraulic riveting tool according to prior art's not enough. The to-be-solved problem of the utility model is to provide a change the total volume size of riveting tool on a small scale, further increase the hydraulic pressure riveting tool of hydro-cylinder output power. The utility model discloses can solve current riveting tool in narrow space, if the limited problem of concave type space riveting, can also solve the not enough problem of current riveting tool working oil pressure supply.

The utility model discloses a following technical scheme realizes:

hydraulic pressure riveting tool, including the casing with by hydraulic oil driven riveting main shaft in the casing, its characterized in that: the main shaft is directly driven by two-stage oil cylinders which are connected in series.

Two-stage hydro-cylinder comprises into hydro-cylinder and oil return cylinder, includes: the front oil cylinder and the secondary oil cylinder are connected in series.

The end part of the inner side of the main shaft is provided with a main piston, and the two sides of the main piston are respectively provided with a forward oil cylinder and a forward return oil cylinder which are formed with the shell; the middle part of the main shaft is provided with a secondary piston formed by an annular bulge, and a secondary oil cylinder and a secondary oil return cylinder which are formed by the secondary piston and the shell are respectively arranged at two sides of the secondary piston; an oil inlet channel is arranged in the main shaft structure body and is communicated with the advancing oil cylinder and the secondary grading oil cylinder in series, and an oil return channel is communicated with the advancing oil cylinder and the secondary returning oil cylinder in series.

The two-stage oil cylinders are separated by a partition plate fixed on the inner wall of the shell.

The oil inlet pipe is communicated with the advancing oil cylinder, and the oil return pipe is communicated with the secondary oil return cylinder.

And grooves for embedding sealing rings or sealing and storing oil are arranged on the contact surfaces of the main piston and the secondary piston and the inner part of the shell.

The outer end of the main shaft is provided with a riveting head for completing riveting operation and connecting a riveting gun head assembly.

The utility model discloses beneficial effect: the utility model discloses riveting tool adopts little cylinder diameter double-cylinder structure, adopts the double-cylinder structure to reduce whole cylinder diameter, the narrow and small region in adaptable more space, like the riveting of interval narrow and small interval between the concave type steel. By adopting a double-cylinder structure, the actual driving pressure area is increased, the driving force can be further increased under the same input condition, and the better working state under the low input condition is ensured. The utility model discloses a serial-type double-cylinder structure to further optimize system architecture, under the same input or output condition, can reduce the whole volume of instrument by a great margin, improve efficiency.

Drawings

FIG. 1 is a schematic cross-sectional view of a small-bore double-cylinder rivet tool;

fig. 2 is a broken sectional view of the main shaft of the small-cylinder-diameter double-cylinder rivet pulling tool.

In the figure, 1 is a rear end cover, 2 is a front return oil cylinder, 3 is a main piston, 4 is a forward oil cylinder, 5 is a partition plate, 6 is a secondary return oil cylinder, 7 is a support rod, 8 is a secondary oil cylinder, 9 is a front end cover, 10 is a connecting sleeve, 11 is a main shaft, 11.1 is an oil inlet channel, 11.2 is an oil return channel, 11.3 is a secondary piston, 11.4 is a rivet joint, 12 is a shell, 13 is a switch button, 14 is an oil return pipe, 15 is an oil inlet pipe, and 16 is a handle.

Detailed Description

The present invention will be further described with reference to the following embodiments, which are intended to illustrate the principles of the present invention without limiting the present invention in any way, and the present invention is not beyond the scope of the present invention.

With reference to the attached drawings.

A hydraulic riveting tool comprises a shell 12 and a riveting main shaft 11 driven by hydraulic oil in the shell 12, wherein the main shaft 11 is directly driven by two-stage oil cylinders connected in series.

Two-stage hydro-cylinder comprises into hydro-cylinder and oil return cylinder by, includes: the forward oil cylinder 4, the secondary progressive oil cylinder 8, the forward return oil cylinder 2 and the secondary return oil cylinder 6 are communicated in series.

The end part of the inner side of the main shaft 11 is a main piston 3, and the two sides of the main piston 3 are respectively a forward oil cylinder 4 and a forward return oil cylinder 2 which are formed with a shell 12; the middle part of the main shaft 11 is provided with a secondary piston 11.3 formed by an annular bulge, and two sides of the secondary piston 11.3 are respectively provided with a secondary oil inlet cylinder 8 and a secondary oil return cylinder 6 which are formed with the shell 12; an oil inlet channel 11.1 and an oil return channel 11.2 are arranged in the main shaft 11 structure body and are communicated with the advancing oil cylinder 4 and the secondary oil inlet cylinder 8 in series, and the advancing oil cylinder 2 and the secondary oil return cylinder 6 in series.

The two-stage cylinders are separated by a partition 5 fixed to the inner wall of the housing 12.

The oil inlet pipe 15 is communicated with the advancing oil cylinder 4, and the oil return pipe 14 is communicated with the secondary oil return cylinder 6.

The contact surfaces of the main piston 3 and the secondary piston 11.3 and the shell 12 are provided with grooves for embedding sealing rings or sealing oil storage.

The outer end of the main shaft 11 is provided with a riveting head 11.4 used for completing riveting operation and connecting a riveting gun head assembly.

The utility model discloses a double-cylinder series structure design is with the inside double-cylinder structure that divide into two feed cylinder and two return cylinder of riveting tool. The forward oil cylinder 4 and the secondary oil cylinder 8 in the double-cylinder structure are realized through a communicating oil path channel in the shaft of the main shaft 11. The utility model discloses a little cylinder diameter double-cylinder rivet tool reduces the cylinder diameter and provides double stress area simultaneously, according to the hydraulic drive principle: f (rated riveting force) ═ P (rated pressure) × S (riveter oil inlet end area), and S (riveter oil inlet end area) ═ 2 × S1 (effective area of cylinder body cross section); under the condition that the rated riveting force F of a riveting product is not changed, if the cylinder diameter is reduced by 16%, the effective area S1 of the corresponding cylinder section is reduced by 30%, S is increased by 40%, and P is reduced by 28.6%. When solving that the cylinder diameter reduces to satisfy that the riveting space is limited, the utility model discloses the instrument also can suitably solve the problem that the working pressure supply is not enough and can realize that pressure is not less than 71.4% of rated pressure in practical application.

As shown in fig. 1 and 2, the riveting tool is composed of a rear end cover 1, a front return oil cylinder 2, a main piston 3, a forward oil cylinder 4, a partition plate 5, a secondary return oil cylinder 6, a support rod 7, a secondary stage oil cylinder 8, a front end cover 9, a connecting sleeve 10, a main shaft 11, a shell 12, a switch button 13, an oil return pipe 14, an oil inlet pipe 15 and a handle 16.

As shown in fig. 1 and 2, the advancing oil cylinder 4 is communicated with the secondary oil cylinder 8 through an oil inlet channel 11.1 in the main shaft 11, and the secondary oil returning cylinder 6 is communicated with the front oil returning cylinder 2 through an oil returning channel 11.2 in the main shaft, so that the cylinder diameter is reduced, and the riveting pressure is ensured;

the utility model is not limited by space according to the riveting at the concave steel concave point; the newly designed and researched small-cylinder-diameter double-cylinder rivet tool has lower required working pressure than a hydraulic rivet tool with the same cylinder diameter, and the problem of insufficient working pressure supply is effectively solved.

When the tool of the utility model is applied, the main shaft 11 is driven by the two-stage oil cylinder directly to do the telescopic reciprocating motion; rivets are arranged on a rivet joint 11.4 gun head assembly of the main shaft 11, a rivet pulling tool is placed in a riveting station limited by space, and the rivet pulling tool needs a hydraulic pump station to provide hydraulic riveting power. Hydraulic oil enters the advancing oil cylinder 4 from the oil inlet pipeline 15, the hydraulic oil enters the secondary progressive oil cylinder 8 through the oil inlet channel 11.1 in the main shaft 11 while filling the advancing oil cylinder 4, and after the oil is filled in all the oil cylinders, the pressure of the advancing oil cylinder 4 and the pressure of the secondary oil cylinder 8 are increased, so that the main shaft 11 is pushed to move towards the rear end cover 1 side; the matched riveting gun head assembly completes riveting work along with the movement of the main shaft 11.

During the return operation, hydraulic oil enters the secondary oil return cylinder 6 from the oil return pipeline 14, the hydraulic oil enters the front oil return cylinder 2 through an oil return channel 11.2 in the main shaft 11 while filling the secondary oil return cylinder 6, and when the oil is filled in all the cylinders, the pressure of the secondary oil return cylinder 6 and the pressure of the front oil return cylinder 2 are increased to push the main shaft 11 to move towards the front end cover 9; the matched riveting gun head assembly finishes riveting withdrawing work along with the movement of the main shaft 11.

Claims

1. A hydraulic riveting tool, includes the casing and by hydraulic oil driven riveting main shaft in the casing, its characterized in that: the main shaft is directly driven by two-stage oil cylinders connected in series; two-stage hydro-cylinder comprises into hydro-cylinder and oil return cylinder, includes: the front oil cylinder and the secondary oil cylinder are connected in series.

2. The hydraulic riveting tool of claim 1, wherein: the end part of the inner side of the main shaft is provided with a main piston, and the two sides of the main piston are respectively provided with a forward oil cylinder and a forward return oil cylinder which are formed with the shell; the middle part of the main shaft is provided with a secondary piston formed by an annular bulge, and a secondary oil cylinder and a secondary oil return cylinder which are formed by the secondary piston and the shell are respectively arranged at two sides of the secondary piston; an oil inlet channel is arranged in the main shaft structure body and is communicated with the advancing oil cylinder and the secondary grading oil cylinder in series, and an oil return channel is communicated with the advancing oil cylinder and the secondary returning oil cylinder in series.

3. The hydraulic riveting tool of claim 2, wherein: the two-stage oil cylinders are separated by a partition plate fixed on the inner wall of the shell.

4. The hydraulic riveting tool of claim 3, wherein: the advancing oil cylinder is communicated with the oil inlet pipe, and the secondary oil return cylinder is communicated with the oil return pipe.

5. The hydraulic riveting tool of claim 3, wherein: and grooves for embedding sealing rings or sealing and storing oil are arranged on the contact surfaces of the main piston and the secondary piston and the inner part of the shell.

6. The hydraulic riveting tool of claim 3, wherein: the outer end of the main shaft is provided with a riveting head for completing riveting operation and connecting a riveting gun head assembly.