CN211343546U

CN211343546U - Big shaft with inner piston and outer piston control

Info

Publication number: CN211343546U
Application number: CN201921136385.9U
Authority: CN
Inventors: 俞培君; 徐国明; 庞立荣
Original assignee: Ningbo Peiyuan Corp ltd
Current assignee: Ningbo Peiyuan Corp ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-08-25
Anticipated expiration: 2029-07-19

Abstract

The utility model provides an inner and outer piston control main shaft, which comprises a body, wherein the lower end of the body is provided with a coaxially arranged bulge, and the lower end surface of the body is provided with a first chamfer; a second chamfer is arranged on the upper end face of the body, a coaxially arranged stepped hole is arranged at the upper end of the body, the aperture of the stepped hole is gradually reduced from top to bottom, a third chamfer is arranged at the upper end part of the stepped hole, a first rolling groove is arranged in the maximum diameter of the upper end of the stepped hole, an oil through hole is connected in the minimum diameter of the bottom of the stepped hole, the oil through hole penetrates through the body, and a fourth chamfer is arranged on the oil through hole; the shaft body of the body is provided with a second rolling groove, the upper end of the second rolling groove is provided with a first arc groove, the upper end of the first arc groove is provided with a groove, and the upper end of the groove is provided with a second arc groove. The utility model discloses inside and outside piston control main shaft, simple structure is convenient for process, long service life, the impact force that the reduction piston that can be better received, the life of extension piston.

Description

Big shaft with inner piston and outer piston control

Technical Field

The utility model relates to a piston rod, in particular to big axle of inside and outside piston control.

Background

The large shaft with the inner piston and the outer piston can be used in a hydraulic turnover system at the head of a truck, the inner piston and the outer piston are connected through the large shaft, and the oil through hole is formed in the joint of the large shaft and the inner piston, so that the oil can be dispersed, the impact force on the piston can be effectively reduced due to the dispersion of the oil, and the service life of the piston can be prolonged. The big axle of inside and outside piston control on the existing market is more kind, but some problems of ubiquitous: for example, structurally comparatively complicated, the processing of being not convenient for, because the design of oil outlet is improper to lead to the dispersion ability of fluid relatively poor, the impact force that can not disperse the piston effectively received, because the holistic structural strength of self is low to lead to life weak point.

SUMMERY OF THE UTILITY MODEL

【1】 Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a simple structure, long service life, the inside and outside piston control main shaft that can effectively disperse the piston and receive the impact force of fluid.

【2】 Technical scheme for solving problems

The utility model provides an inner and outer piston control main shaft, which comprises a body, wherein the lower end of the body is provided with a coaxially arranged bulge, and the lower end surface of the body is provided with a first chamfer; a second chamfer is arranged on the upper end face of the body, a coaxially arranged stepped hole is arranged at the upper end of the body, the aperture of the stepped hole is gradually reduced from top to bottom, a third chamfer is arranged at the upper end part of the stepped hole, a first rolling groove is arranged in the maximum diameter of the upper end of the stepped hole, an oil through hole is connected in the minimum diameter of the bottom of the stepped hole, the oil through hole penetrates through the body, and a fourth chamfer is arranged on the oil through hole; the oil-gas separator is characterized in that a second rolling groove is formed in the shaft body of the body, a first arc groove is formed in the upper end of the second rolling groove, the oil through hole is formed in the center of the first arc groove, a groove is formed in the upper end of the first arc groove, and a second arc groove is formed in the upper end of the groove.

Furthermore, the diameter of the oil through holes is 6mm, the diameter of the oil through holes is smaller than the minimum diameter of the bottom of the stepped hole, the number of the oil through holes is two, and the axes of the two oil through holes are perpendicular to each other.

Furthermore, the axis of the stepped hole and the axes of the two oil through holes are intersected at one point and are mutually perpendicular.

Further, first rolling groove includes fifth chamfer and sixth chamfer, the fifth chamfer is fillet and size and is R1.1mm, the sixth chamfer is chamfer angle and size and is 30.

Further, second rolling groove includes seventh chamfer and eighth chamfer, the seventh chamfer is fillet and size R1.3mm, the eighth chamfer is chamfer angle and size 30.

Further, the distance between the lower end face of the protrusion and the lower end face of the body is greater than or equal to 3mm and less than or equal to 5 mm.

Further, the shaft body of the piston rod body needs to be subjected to high-frequency quenching from the second rolling groove downwards, the depth of a hardening layer is more than or equal to 0.6mm and less than or equal to 1mm, and the hardness is more than or equal to 50HRC and less than or equal to 57 HRC.

【3】 Advantageous effects

The utility model discloses inside and outside piston control main shaft, simple structure is convenient for process, long service life, the impact force that the reduction piston that can be better received, the life of extension piston.

Drawings

FIG. 1 is a schematic structural view of the inner and outer piston control main shaft of the present invention;

FIG. 2 is a partial cross-sectional view of section A of FIG. 1;

FIG. 3 is a cross-sectional view of section B of FIG. 1;

fig. 4 is an enlarged view of a portion C of fig. 2.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the utility model provides an inner and outer piston control main shaft, which comprises a body 1, wherein the lower end of the body 1 is provided with a coaxially arranged bulge 2, the bulge 2 is used for connecting an outer piston, the lower end surface of the body 1 is provided with a first chamfer 3, and the first chamfer 3 is a chamfer angle and has a size of 40 degrees; a second chamfer 11 is arranged on the upper end face of the body 1, and the second chamfer 11 is a chamfer angle and has a size of 45 degrees; a coaxially arranged stepped hole 5 is formed in the upper end of the body 1, the aperture of the stepped hole 5 is gradually reduced from top to bottom, a third chamfer is arranged at the upper end of the stepped hole 5, the third chamfer is a chamfer angle and has a size of 30 degrees, in the example, chamfers are respectively arranged at the joints of different apertures in the stepped hole 5, and detailed description is not needed; a first rolling groove 12 is arranged in the maximum diameter of the upper end of the stepped hole 5, in the example, the first rolling groove 12 comprises a fifth chamfer and a sixth chamfer, the fifth chamfer is a fillet and has the size of R1.1mm, and the sixth chamfer is a chamfer and has the size of 30 degrees; an oil through hole 6 is connected in the minimum diameter of the bottom of the stepped hole 5, the oil through hole 6 penetrates through the outer wall of the body 1, and a fourth chamfer 7 is arranged on the oil through hole 6; a second rolling groove 4 is formed in the shaft body of the body 1, in this embodiment, the second rolling groove 4 includes a seventh chamfer and an eighth chamfer, the seventh chamfer is a fillet and has a size of r1.3mm, the eighth chamfer is a chamfer angle and has a size of 30 °, a first arc groove 8 is formed in the upper end of the second rolling groove 4, the oil through hole 6 is formed in the center of the first arc groove 8, and the distance from the axis of the oil through hole 6 to the upper end face of the body 1 is 38mm in this embodiment; the upper end of first circular arc groove 8 is equipped with recess 9, the upper end of recess 9 is equipped with second circular arc groove 10.

In order to facilitate connection of the outer piston, in this embodiment, the distance between the lower end surface of the protrusion 2 and the lower end surface of the body 1 is greater than or equal to 3mm and less than or equal to 5mm, and it is determined in more practical cases that a distance of 4mm is selected in this example, and the protrusion 2 is cylindrical.

In order to improve the oil outlet efficiency and reduce the impact of oil on an inner piston, in this embodiment, the diameter of the oil through hole 6 is 6mm, the fourth chamfer 7 is a chamfer with the depth of 1mm by using a drill bit with the diameter of 7.5mm and the angle of 90 °, the diameter of the oil through hole 6 is smaller than the minimum diameter of the bottom of the stepped hole 5, the minimum diameter of the bottom of the stepped hole 5 is 12mm, the number of the oil through holes 6 is two, the axes of the two oil through holes 6 are perpendicular to each other, and the axis of the stepped hole 5 and the axes of the two oil through holes 6 intersect at one point and are perpendicular to each other.

In order to prolong the service life, the shaft body of the piston rod body 1 is subjected to high-frequency quenching from the second rolling groove 4 downwards in the embodiment, the depth of a hardening layer is more than or equal to 0.6mm and less than or equal to 1mm, the hardness is more than or equal to 50HRC and less than or equal to 57HRC, and the depth of the hardening layer is 0.8mm and the hardness is 55HRC in the embodiment.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an inside and outside piston control staff which characterized in that: the device comprises a body (1), wherein the lower end of the body (1) is provided with a coaxially arranged bulge (2), and the lower end surface of the body (1) is provided with a first chamfer (3); a second chamfer (11) is arranged on the upper end face of the body (1), a step hole (5) which is coaxially arranged is arranged at the upper end of the body (1), the aperture of the step hole (5) is gradually reduced from top to bottom, a third chamfer is arranged at the upper end of the step hole (5), a first rolling groove (12) is arranged in the maximum diameter of the upper end of the step hole (5), an oil through hole (6) is connected in the minimum diameter of the bottom of the step hole (5), the oil through hole (6) penetrates through the body (1), and a fourth chamfer (7) is arranged on the oil through hole (6); the shaft body of the body (1) is provided with a second rolling groove (4), the upper end of the second rolling groove (4) is provided with a first arc groove (8), the oil through hole (6) is formed in the central position of the first arc groove (8), the upper end of the first arc groove (8) is provided with a groove (9), and the upper end of the groove (9) is provided with a second arc groove (10).

2. The inner and outer piston control macroaxis of claim 1, wherein: the diameter of the oil through holes (6) is 6mm, the diameter of the oil through holes (6) is smaller than the minimum diameter of the bottom of the stepped hole (5), the number of the oil through holes (6) is two, and the axes of the two oil through holes (6) are perpendicular to each other.

3. The inner and outer piston control macroaxis of claim 2, wherein: the axial line of the stepped hole (5) is intersected with the axial lines of the two oil through holes (6) at one point and is mutually vertical.

4. The inner and outer piston control macroaxis of claim 1, wherein: first rolling groove (12) include fifth chamfer and sixth chamfer, the fifth chamfer is fillet and size and is R1.1mm, the sixth chamfer is chamfer angle and size and is 30.

5. The inner and outer piston control macroaxis of claim 1, wherein: second rolling groove (4) include seventh chamfer and eighth chamfer, the seventh chamfer is fillet and size R1.3mm, the eighth chamfer is chamfer angle and size 30.

6. The inner and outer piston control macroaxis of claim 1, wherein: the distance between the lower end face of the protrusion (2) and the lower end face of the body (1) is greater than or equal to 3mm and less than or equal to 5 mm.

7. The inner and outer piston control macroaxis of claim 1, wherein: the shaft body of the body (1) needs to be subjected to high-frequency quenching from the second rolling groove (4) downwards, the depth of a hardening layer is more than or equal to 0.6mm and less than or equal to 1mm, and the hardness is more than or equal to 50HRC and less than or equal to 57 HRC.