CN202252113U

CN202252113U - Novel double-H valve for transmission case of commercial vehicle

Info

Publication number: CN202252113U
Application number: CN2011203319256U
Authority: CN
Inventors: 姜芝军
Original assignee: Zhejiang Keli Vehicle Control System Co Ltd
Current assignee: Zhejiang Keli Vehicle Control System Co Ltd
Priority date: 2011-09-06
Filing date: 2011-09-06
Publication date: 2012-05-30
Anticipated expiration: 2021-09-06

Abstract

The utility model provides a novel double-H valve for a transmission case of a commercial vehicle, and the novel double-H valve comprises a valve body, an ejection rod, valve cores, O-shaped sealing rings and spacer bushes, wherein the spacer bushes are arranged in the valve body and the valve cores are arranged in the spacer bushes; the spacer bushes are arranged by sections and the O-shaped sealing rings are arranged between the spacer bushes. According to the utility model, the spacer bushes are arranged by sections and one O-shaped sealing ring is arranged in each group of the spacer bushes, so that an air flow channel is enlarged, the air flow is increased, the dust cannot stay or accumulate in the valve cavity, the sealing effect is better and the service life is greatly prolonged.

Description

A kind of commercial car gearbox is used novel double H valve

Technical field

The utility model belongs to auto manufacturing's technical field, the double H valve that particularly a kind of automobile gearbox is used.

Background technique

High and low shift switches very frequently in the automobile running, and the residing position of gearbox work condition environment is relatively more abominable again.Traditional commercial car gearbox is used double H valve, and by valve body, push rod, spool, big O-ring seals, little O-ring seals and spacer, spacer is located in the valve body usually; Spool is located in the spacer; Spacer is global design, and the big O-ring seals of each group and little O-ring seals are located at respectively between corresponding spacer and spool and the valve body, similar each valve of the big O-ring seals of each group and little O-ring seals; Through the promotion of push rod to spool; Open or close corresponding inlet opening and delivery outlet,, realized that gearbox switches between top grade and low grade through the ventilation of control mouth and the switching of dying.Diameter 6 mm of common spool.The double H valve of this structure has adopted two O-ring seals for every group, makes air flue diminish, and throughput is little; The moment of exhaust when high and low shift switches; Dust is inhaled in the valve pocket from relief opening easily, with airway obstruction, causes spool hair fastener or throughput to reduce; Make high and low shift can't switch or put into gear difficulty, time-delay, cause the early failue of double H valve.

The model utility content

The purpose of the utility model is the deficiency to said structure, provides a kind of simple and reasonable, and air flue and throughput are big, and steering force is little, long service life, and commercial car gearbox stable and reliable for performance is used novel double H valve.

The technological scheme that technical problem adopted that the utility model solves is:

A kind of commercial car gearbox is used novel double H valve, comprises valve body, push rod, spool, O-ring seals and spacer, and spacer is located in the valve body, and spool is located in the spacer, it is characterized in that spacer segmentation setting, and above-mentioned O-ring seals is located between spacer.

The structure of the utility model has changed original each group and has adopted two O-ring seals to be located at respectively between corresponding spacer and spool and the valve body, adopts spacer segmentation setting; Each group is located between spacer with an O-ring seals; Increased air-flow path, strengthened throughput, dust can't be stopped or build up in valve pocket inside; Sealing effect is better, and prolong working life greatly.

Above-mentioned valve core diameter is 9mm, and the spool size is increased to diameter 9 mm by traditional diameter 6 mm, has further increased air-flow path.

The beneficial effect of the utility model is: the utility model adopts spacer segmentation setting, and each group is located between spacer with an O-ring seals, has increased air-flow path; Strengthened throughput; Dust can't be stopped or build up in valve pocket inside, and sealing effect is better, and prolong working life greatly.

Description of drawings

Below in conjunction with accompanying drawing and embodiment model utility is further specified.

Fig. 1 is the utility model embodiment original state structural representation.

Fig. 2 is that the utility model embodiment push rod is by the structural representation after heading into.

Among the figure: 1, push rod 2, lining 3, guide sleeve 4, spool 5, O-ring seals 6, spacer 7, valve body 8, return spring 9, end cap.

Embodiment

In Fig. 1 and Fig. 2; A kind of commercial car gearbox is used novel double H valve, comprises push rod 1, lining 2, guide sleeve 3, spool 4, O-ring seals 5, spacer 6, valve body 7, return spring 8, end cap 9, and spacer 6 is located in the valve body 7; Spool 4 is located in the spacer 6; Spacer 6 segmentation settings, O-ring seals 5 is located between each spacer, and spool 4 diameters are 9mm.The structure of the utility model has changed original each group and has adopted two O-ring seals to be located at respectively between corresponding spacer and spool and the valve body, adopts spacer segmentation setting; Each group is located between spacer with an O-ring seals; Increased air-flow path, strengthened throughput, dust can't be stopped or build up in valve pocket inside; Sealing effect is better, and prolong working life greatly.

When low-grade, as shown in Figure 1, pressurized air is from 11 mouthfuls of inputs, 21 mouthfuls of outputs.When handling shelves switching from low to high, push rod 1 is promoted spool 4 and moves to left by the cam extruding, cuts off 21 mouthfuls and connects 22 mouthfuls; Pressurized air is from 22 mouthfuls of outputs, and unnecessary gas enters atmosphere from 31 mouthfuls in 21 mouthfuls simultaneously, realizes gear shift; Form as shown in Figure 2 because a little O-ring seals on the spacer 6 has been cancelled in the increasing of spool 4 diameters simultaneously; Make air flue become bigger, throughput is strengthened greatly, and dust just is difficult for being stuck between spool and the O-ring seals or rests in the valve pocket; When by height when low grade is switched, push rod 1 is released, and under the effect of return spring 8, promotes spool 4 and moves to right, and then cuts off 22 mouthfuls and connects 21 mouthfuls, unnecessary gas enters atmosphere from 32 mouthfuls in 22 mouthfuls simultaneously, realizes switching, and forms as shown in Figure 1.Because after throughput strengthened, spool 4 catching phenomena solved, it will be more smooth and easy that high and low shift switches.

The foregoing description is the explanation to the utility model, is not the qualification to the utility model, and any structure after simple transformation on the utility model basis all belongs to the protection domain of the utility model.

Claims

1. a commercial car gearbox is used novel double H valve, comprises valve body, push rod, spool, O-ring seals and spacer, and spacer is located in the valve body, and spool is located in the spacer, it is characterized in that spacer segmentation setting, and above-mentioned O-ring seals is located between spacer.

2. a kind of commercial car gearbox according to claim 1 is used novel double H valve, it is characterized in that above-mentioned valve core diameter is 9mm.