CN213981455U

CN213981455U - Split type piston

Info

Publication number: CN213981455U
Application number: CN202022290312.4U
Authority: CN
Inventors: 周玉东; 王印
Original assignee: Guizhou Xinan Aviation Machinery Co Ltd
Current assignee: Guizhou Xinan Aviation Machinery Co Ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-08-17
Anticipated expiration: 2030-10-14

Abstract

The utility model discloses a split type piston, the piston includes connecting rod, first spring, ejector pin, spring holder, casing, and the connecting rod is connected with the spring holder through the ejector pin, and the first spring sets up between ejector pin and spring holder, is equipped with the push rod in the one-level piston, and the push rod overcoat has the second spring, is equipped with the clearance between ejector pin and the push rod; the secondary piston is attached to the primary piston under the action of a second spring force and is fixedly connected with the push rod; the return spring is arranged on the outer side of the primary piston, one end of the return spring is abutted against the port of the primary piston, and the other end of the return spring is abutted against the port of the secondary piston; the first leather cup is arranged at one end of the primary piston; the second leather cup is arranged at one end of the second-stage piston. The split piston can effectively realize that the piston mechanism obtains force with a smaller idle stroke in the thrust transmission process, so that a person can sense the existence of self-applied force by the smaller idle stroke when transmitting thrust, and the person can be better fed back after applying thrust.

Description

Split type piston

Technical Field

The utility model belongs to hydraulic piston field especially relates to a split type piston.

Background

At present, the piston transmission thrust in the hydraulic design field is widely applied to various products in the mechanical field, each piston motion mechanism has the function of transmitting the thrust, the design types carried out by combining the man-machine function requirements are various, and the generated requirements are different. Because a person can sense the existence of self-applied force after desiring to transmit a small idle stroke when transmitting thrust, in order to better meet the requirement that the person can obtain better feedback after applying thrust, the design of transmitting thrust by the piston puts forward higher requirements. In order to solve the potential problem, the piston structure can be widely applied to the market in the future, and the design requirement of higher products is met, so that the limit structure needs to be optimally designed.

In order to solve the problem, the utility model provides a split type piston effectively realizes that piston mechanism just can perceive the existence of oneself exerting force with less idle stroke at the transmission thrust in-process to make the people can obtain the feedback better after exerting thrust.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a split type piston, the utility model discloses a can effectively realize that piston mechanism just can perceive the existence of oneself exerting force with less idle stroke in the transmission thrust in-process to make the people can obtain the feedback better after exerting thrust.

The purpose of the utility model is realized by adopting the following technical scheme:

the utility model provides a split type piston, includes connecting rod, first spring, ejector pin, spring holder, casing, the connecting rod pass through the ejector pin with the spring holder is connected, first spring sets up the ejector pin with between the spring holder, still include:

the piston rod is arranged in the primary piston, a second spring is sleeved outside the push rod, one end of the second spring is abutted against one end of the primary piston, the other end of the second spring is abutted against the end part of the push rod, and a gap of 0.5mm-1mm is formed between the push rod and the push rod;

the secondary piston is attached to the primary piston under the action of the second spring force, and the secondary piston is fixedly connected with the push rod;

the return spring is arranged on the outer side of the primary piston, one end of the return spring is abutted against the port of the primary piston, and the other end of the return spring is abutted against the port of the secondary piston;

the first leather cup is arranged at one end of the primary piston;

and the second leather cup is arranged at one end of the secondary piston.

Furthermore, the rigidity of the first spring is greater than that of the return spring, the return spring is pressed to deform due to the fact that the rigidity of the first spring is greater than that of the return spring, and the secondary piston and the primary piston are attached under the action of the second spring, so that the whole body starts to move downwards.

Furthermore, the primary piston is arranged in a hollow mode, the edge of one end of the primary piston extends outwards, the extending portion of the primary piston abuts against the spring seat, a groove is formed in the other end of the primary piston, and the first leather cup is arranged in the groove.

Furthermore, the cross section of the primary piston is convex.

Further, the secondary piston is connected with the push rod through threads.

Furthermore, the gap between the ejector rod and the push rod is 0.5mm, and due to the existence of the gap of 0.5mm between the ejector rod and the push rod, when the primary piston is limited, the gap between the ejector rod and the push rod exists, and after the primary piston stops moving, due to the effect of the thrust of the connecting rod, the ejector rod overcomes the idle stroke and is in contact with the push rod, so that the effect of transmitting the stress to the secondary piston is realized.

Further, still include the sealing washer, the sealing washer sets up in one-level piston.

Further, the sealing washer sets up the push rod with between the one-level piston, because the existence of sealing washer between push rod and the one-level piston, can not produce the effect to the effect of second grade piston at the fluid of transmission power one-level piston, the stress surface of transmission power is the area of second grade piston this moment, compares that one-level piston area is little, and the stroke of transmission is greater than one-level piston.

Furthermore, the connecting rod, the first spring, the ejector rod, the spring seat, the primary piston, the first leather cup, the secondary piston and the second leather cup are arranged in the shell.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the split piston can effectively realize that the piston mechanism obtains force with a smaller idle stroke in the thrust transmission process, so that a person can sense the existence of self-applied force by the smaller idle stroke when transmitting thrust, and the person can be better fed back after applying thrust.

Drawings

FIG. 1 is a schematic view of the installation structure of the present invention

Wherein: 1-connecting rod, 2-first spring, 3-ejector rod, 4-spring seat, 5-primary piston, 6-second spring, 7-return spring, 8-push rod, 9-first leather cup, 10-sealing ring, 11-secondary piston and 12-second leather cup.

Detailed Description

The present invention will be further described with reference to fig. 1 and the detailed description thereof, and it should be noted that, in the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

What figure 1 shows is a split type piston, including connecting rod 1, first spring 2, ejector pin 3, spring holder 4, casing, connecting rod 1 is connected with spring holder 4 through ejector pin 3, and first spring 2 sets up between ejector pin 3 and spring holder 4, still includes:

the one-level piston 5 is internally provided with a push rod 8 in the one-level piston 5, the push rod 8 is externally sleeved with a second spring 6, one end of the second spring 6 is abutted against one end of the one-level piston 5, the other end of the second spring is abutted against the end part of the push rod 8, a 0.5mm-1mm gap is arranged between the ejector rod 3 and the push rod 8, and preferably, the gap between the ejector rod 3 and the push rod 8 is 0.5 mm.

Second grade piston 11, second grade piston 11 and one-level piston 5 laminate under the effect of second spring 6 power, second grade piston 11 and push rod 8 fixed connection.

The second spring 6 is sleeved into the push rod 8, the first-stage piston 5 provided with the sealing ring 10 is installed, the second-stage piston 11 sleeved into the second leather cup 12 is screwed into the push rod 8 through threads until the requirement of the elasticity of the second spring 6 is met, the return spring 7 is sleeved into the first-stage piston 5, the whole piston is installed inside a shell of the piston installation, the spring seat 4, the first spring 2, the ejector rod 3 and the connecting rod 1 are sequentially installed from the installation opening of the shell, the fixing nut at the opening of the shell is installed in place, and the installation of the whole split piston structure is completed.

And the return spring 7 is arranged on the outer side of the primary piston 5, one end of the return spring 7 is abutted against the port of the primary piston 5, and the other end of the return spring is abutted against the port of the secondary piston 11. The stiffness of the first spring 2 is greater than the stiffness of the return spring 7. Through utilizing the rigidity of first spring 2 to be greater than the rigidity of return spring 7, realize when connecting rod 1 atress, two pole springs are pressurized respectively, and the spring that rigidity is little compresses earlier, and return spring 7 compresses earlier promptly, and the deformation of first spring 2 is little and makes whole present the effect of moving toward the atress direction.

Due to the movement of the return spring, the primary piston 5 and the first leather cup 9 move along the stress direction, and move together with the primary piston 5 and the secondary piston 11 under the action of the push rod 8 and the second spring 6 during installation, the stress surface of the whole transmission force is equivalent to the area of the primary piston 5, and then the effect of transmitting large thrust and small stroke at the initial stage is realized.

The motion of one-level piston 5 is only in the initial stage, so the inside spacing face of stroke that is provided with of casing makes one-level piston 5 and first leather cup 9 stop motion, at this moment owing to guarantee the existence of clearance 0.5mm between ejector pin 3 and the push rod 8 when beginning the installation, at one-level piston 5 when spacing, the clearance exists between ejector pin 3 and the push rod 8, after one-level piston 5 stop motion, because ejector pin 3 receives the effect of the thrust of connecting rod 1, overcome idle stroke, contact with push rod 8, realize the effect that the atress transmits to second piston 11.

The first leather cup 9, the first leather cup 9 is arranged at one end of the primary piston 5;

and a second cup 12, wherein the second cup 12 is arranged at one end of the secondary piston 11. Under the action of force after the ejector rod 3 is contacted with the push rod 8, the push rod 8 pushes the secondary piston 11 and the second leather cup 12 to move together in the stress direction, and the motion of the secondary piston is realized.

In a preferred embodiment, the primary piston 5 is hollow, and has one end edge extending outwards, the extending part of the primary piston abuts against the spring seat 4, the other end of the primary piston is provided with a groove, and the first leather cup 9 is arranged in the groove. The cross section of the primary piston 5 is convex.

In a preferred embodiment, the secondary piston 11 is connected to the push rod 8 by means of a screw thread.

In a preferred embodiment, the seal ring 10 is provided in the primary piston 5, and the presence of the seal ring 10 between the push rod 8 and the primary piston 5 prevents the oil of the primary piston 5 from acting on the secondary piston 11, and at this time, the force receiving surface for the transmitted force is the area of the secondary piston 11, and is smaller than the area of the primary piston 5, and the transmitted stroke is larger than that of the primary piston 5.

The working process is as follows: the connecting rod 1 is forced to push the first spring 2, the ejector rod 3 and the spring seat 4 to move downwards, the return spring 7 is pressed to deform because the rigidity of the first spring 2 is greater than that of the return spring 7, and the secondary piston 11 and the primary piston 5 are attached under the action of the second spring 6, so that the whole body starts to move downwards; after the first-stage piston 5 and the first packing cup 9 move to the inner stroke limit of the shell, the first spring 2 is pressed to overcome the stroke clearance of 0.5mm, so that the ejector rod 3 is jointed with the push rod 8, and the second spring 6 is compressed to jointly push the second-stage piston 11 to drive the second packing cup 12 to jointly move, thereby realizing the split movement function of the split piston.

The principle is as follows: the split type movement of the inner piston of the product is realized by utilizing the fact that the rigidity of the first spring 2 is larger than that of the return spring 7 and the existence of a gap (0.5mm) between the ejector rod 3 and the push rod 8.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a split type piston, includes connecting rod (1), first spring (2), ejector pin (3), spring holder (4), casing, connecting rod (1) through ejector pin (3) with spring holder (4) are connected, first spring (2) set up ejector pin (3) with between spring holder (4), its characterized in that: the split piston further includes:

the device comprises a primary piston (5), a push rod (8) is arranged in the primary piston (5), a second spring (6) is sleeved outside the push rod (8), one end of the second spring (6) abuts against one end of the primary piston (5), the other end of the second spring abuts against the end part of the push rod (8), and a gap is formed between the ejector rod (3) and the push rod (8);

the secondary piston (11) is attached to the primary piston (5) under the action of the second spring (6), and the secondary piston (11) is fixedly connected with the push rod (8);

the return spring (7) is arranged on the outer side of the primary piston (5), one end of the return spring (7) is abutted against the port of the primary piston (5), and the other end of the return spring is abutted against the port of the secondary piston (11);

the first leather cup (9), the first leather cup (9) is arranged at one end of the primary piston (5);

and the second packing cup (12), wherein the second packing cup (12) is arranged at one end of the secondary piston (11).

2. The split piston of claim 1, wherein: the rigidity of the first spring (2) is greater than that of the return spring (7).

3. The split piston of claim 2, wherein: the primary piston (5) is arranged in a hollow mode, the edge of one end of the primary piston extends outwards, the extending part of the primary piston is abutted to the spring seat (4), a groove is formed in the other end of the primary piston, and the first leather cup (9) is arranged in the groove.

4. The split piston of claim 1, wherein: the cross section of the primary piston (5) is convex.

5. The split piston of claim 4, wherein: the secondary piston (11) is connected with the push rod (8) through threads.

6. The split piston of any one of claims 1 to 5, wherein: the gap between the ejector rod (3) and the push rod (8) is 0.5mm-1 mm.

7. The split piston of claim 6, wherein: still include sealing washer (10), sealing washer (10) set up in one-level piston (5).

8. The split piston of claim 7, wherein: the sealing ring (10) is arranged between the push rod (8) and the primary piston (5).

9. The split piston of claim 8, wherein: the connecting rod (1), the first spring (2), the ejector rod (3), the spring seat (4), the primary piston (5), the first leather cup (9), the secondary piston (11) and the second leather cup (12) are arranged in the shell.