High-low gear pressure-adjustable gas circuit of heavy truck

Abstract

The utility model discloses a heavy truck high-low gear pressure-adjustable air channel which comprises an auxiliary box air cylinder and further comprises a high gear air pipe and a low gear air pipe which are connected to the auxiliary box air cylinder. One end of the high-baffle air pipe is communicated with one side cavity of the auxiliary box cylinder; one end of the low-baffle air pipe is communicated with the other side cavity of the auxiliary box cylinder; the other end of the air blocking pipe is communicated with the double-H valve; pressure regulating valves are respectively mounted on the high-gear air pipe and the low-gear air pipe; and the double-H valve is communicated with an air source. According to the heavy truck high-low gear pressure-adjustable air channel, the air pressure of the high-low gear air channel is controlled through the pressure adjusting valve, the air pressure of the high-low gear air channel can be adjusted independently according to the actual driving working condition, and therefore stable switching of the high gear and the low gear of an auxiliary box synchronizer is achieved; the problem that a traditional heavy truck gas circuit cannot independently adjust high / low gear gas inlet pressure is solved, the service life of an auxiliary box synchronizer is prolonged, and therefore better economic benefits are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox technical field, concretely relates to a heavy truck high low gear adjustable pressure gas circuit. BACKGROUND

[0002] Heavy truck as the main force of highway transportation shoulders the quite important responsibility in the logistics industry. The heavy truck often adopts the lock pin type synchronizer as the key part of the power transmission of the auxiliary gearbox, and the high low gear of the auxiliary gearbox synchronizer is switched through the pneumatic gear shifting to realize the multi-speed ratio transmission of the transmission, so that the transmission works in the relatively economic power interval. Due to the wear and tear of the friction pair of the auxiliary gearbox synchronizer, the high low gear tooth impact problem occurs in the process of switching the gear of the auxiliary gearbox. The frequent tooth impact accelerates the wear and tear of the parts of the auxiliary gearbox synchronizer, and finally causes the failure of the synchronizer, which directly affects the use effect and safety of the heavy truck, and causes the loss of the customers in the economic benefits and safety.

[0003] The traditional auxiliary gearbox gas circuit of the heavy truck cannot adjust the inlet gas circuit, so the auxiliary gearbox always uses the same cylinder thrust to shift gears when switching. After the friction material of the auxiliary gearbox synchronizer is worn for a period of time, the auxiliary gearbox shifting force is not changed accordingly, so the problem of relatively fast auxiliary gearbox shifting and high low gear switching tooth impact occurs. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a heavy truck high low gear adjustable pressure gas circuit to solve the problem of the traditional auxiliary gearbox gas circuit of the heavy truck in the prior art, which cannot adjust the inlet gas circuit and is prone to the problem of relatively fast auxiliary gearbox shifting and high low gear switching tooth impact.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme to realize it: a heavy truck high low gear adjustable pressure gas circuit, comprising an auxiliary gearbox cylinder, a high gear gas pipe and a low gear gas pipe connected to the auxiliary gearbox cylinder.

[0006] One end of the high gear gas pipe is communicated with one side cavity of the auxiliary gearbox cylinder, and one end of the low gear gas pipe is communicated with the other side cavity of the auxiliary gearbox cylinder.

[0007] The other end of the high gear gas pipe is communicated with a double H valve, the other end of the low gear gas pipe is communicated with the double H valve, a pressure regulating valve is installed on the high gear gas pipe and the low gear gas pipe respectively, and the double H valve is communicated with an air source.

[0008] The utility model also has the following technical features:

[0009] The air source comprises an air filter and a gas circuit control valve communicated with the air filter, and the air filter is communicated with the air inlet of the gas circuit control valve through an inlet gas pipe.

[0010] The gas source further comprises a pre-selection valve, the first gas outlet of the gas path control valve is communicated with the double H valve, the second gas outlet of the gas path control valve is communicated with the air inlet of the pre-selection valve, and the air outlet of the pre-selection valve is communicated with the control gas port of the double H valve.

[0011] The first gas outlet of the gas path control valve is communicated with the double H valve through a first gas outlet pipe.

[0012] The second gas outlet of the gas path control valve is communicated with the air inlet of the pre-selection valve through a second gas outlet pipe.

[0013] The air outlet of the pre-selection valve is communicated with the control gas port of the double H valve through a third gas outlet pipe.

[0014] Compared with the prior art, the utility model has the following technical effects:

[0015] (I) the utility model provides a kind of heavy truck high-low gear adjustable pressure gas path, and high-low gear gas pressure is respectively controlled by pressure regulating valve, and high / low gear gas pressure can be independently adjusted according to actual driving condition, to realize the smooth switching of auxiliary gearbox synchronizer high-low gear, solve the problem that traditional heavy truck gas path cannot independently adjust high / low gear inlet pressure, prolong the service life of auxiliary gearbox synchronizer, to realize better economic benefit.

[0016] (II) the utility model provides a kind of heavy truck high-low gear adjustable pressure gas path, and the structure is simple, easy to operate, safe and reliable, and strong adaptability. DRAWINGS

[0017] Figure 1 It is the installation position schematic view of a kind of heavy truck high-low gear adjustable pressure gas path of the utility model.

[0018] Meaning of each label in the drawing:

[0019] 1-auxiliary gearbox cylinder, 2-high gear gas pipe, 3-low gear gas pipe, 4-double H valve, 5-pressure regulating valve, 6-gas source.

[0020] 6-1-air filter, 6-2-gas path control valve, 6-3-air inlet gas pipe, 6-4-pre-selection valve, 6-5-first gas outlet pipe, 6-6-second gas outlet pipe, 6-7-third gas outlet pipe.

[0021] The specific content of the utility model is further explained and described in detail in combination with embodiments. DETAILED DESCRIPTION

[0022] All components in the utility model, if no special description, all adopt known components in prior art.

[0023] The following gives the specific embodiments of the present application, and it should be noted that the present application is not limited to the following specific embodiments, and any equivalent transformations made on the basis of the technical solutions of the present application all fall within the protection scope of the present application.

[0024] Embodiment 1:

[0025] The present embodiment gives a kind of heavy truck high-low gear adjustable pressure gas circuit, as shown in Figure Figure 1 It further includes high gear air pipe 2 and low gear air pipe 3 connected to auxiliary cylinder 1.

[0026] One end of high gear air pipe 2 is communicated with one side cavity of auxiliary cylinder 1, and one end of low gear air pipe 3 is communicated with the other side cavity of auxiliary cylinder 1.

[0027] The other end of high gear air pipe 2 is communicated with double H valve 4, and the other end of low gear air pipe 3 is communicated with double H valve 4.

[0028] Pressure regulating valve 5 is installed on high gear air pipe 2 and low gear air pipe 3 respectively.

[0029] Double H valve 4 is communicated with air source 6.

[0030] As a preferred embodiment of the present embodiment:

[0031] Air source 6 includes air filter 6-1 and air path control valve 6-2 communicated with air filter 6-1, air filter 6-1 is communicated with air inlet of air path control valve 6-2 through air inlet pipe 6-3, and in the present embodiment, air filter 6-1 is communicated with vehicle air pump.

[0032] Air source 6 further includes preselection valve 6-4, first air outlet of air path control valve 6-2 is communicated with double H valve 4, second air outlet of air path control valve 6-2 is communicated with air inlet of preselection valve 6-4, and air outlet of preselection valve 6-4 is communicated with control air port of double H valve 4.

[0033] As a preferred embodiment of the present embodiment:

[0034] First air outlet of air path control valve 6-2 is communicated with double H valve 4 through first air outlet pipe 6-5.

[0035] Second air outlet of air path control valve 6-2 is communicated with air inlet of preselection valve 6-4 through second air outlet pipe 6-6.

[0036] Air outlet of preselection valve 6-4 is communicated with control air port of double H valve 4 through third air outlet pipe 6-7.

[0037] The specific working process of the present application:

[0038] When the high gear of the auxiliary gearbox is switched, the compressed air output by the vehicle air pump enters the air inlet pipe 6-3 through the pressure regulation of the air filter 6-1, then passes through the air path control valve 6-2, the air path control valve 6-2 realizes the opening and closing of the air path in the movement of the gear shifting lever, and simultaneously serves as the air source of the pre-selection valve 6-4, and then the compressed air enters the double-H valve 4, the control air path of the pre-selection valve 6-4 is connected to the double-H valve 4, the compressed air enters the high gear air pipe 2 through the double-H valve 4 by rotating the handle of the pre-selection valve 6-4 to switch the high gear position, the compressed air in the high gear air pipe 2 enters the right cavity of the auxiliary gearbox cylinder 1 after the pressure regulation of the pressure regulating valve 5 installed in the air path thereof, drives the piston to move to the left, and the high gear of the auxiliary gearbox is switched, and simultaneously the residual gas in the left cavity of the piston of the auxiliary gearbox cylinder 1 flows back to the double-H valve 4 through the low gear air pipe 3 and is discharged through the exhaust hole.

[0039] When the low gear of the auxiliary gearbox is switched, the handle of the pre-selection valve 6-4 is rotated to switch the low gear position, so that the compressed air enters the low gear air pipe 3 through the double-H valve 4, the compressed air in the low gear air pipe 3 enters the left cavity of the piston of the auxiliary gearbox cylinder 1 after the pressure regulation of the pressure regulating valve 5 installed in the air path thereof, drives the piston to move to the right, and the low gear of the auxiliary gearbox is switched, and simultaneously the residual gas in the right cavity of the piston of the auxiliary gearbox cylinder 1 flows back to the double-H valve 4 through the high gear air pipe 2 and is discharged through the exhaust hole.

[0040] During the switching of the high gear and the low gear of the auxiliary gearbox, the two pressure regulating valves 5 installed in the air paths of the high gear and the low gear respectively can independently regulate the air pressure of the respective air paths according to the use requirement, so that the purpose of flexibly controlling the gear shifting air pressure of the auxiliary gearbox is realized, and the stable and smooth switching of the auxiliary gearbox is ensured.

[0041] In summary, the pressure regulating air path of the high gear and the low gear of the heavy truck transmission designed in the application has the advantage that the conventional auxiliary gearbox air path switching cannot realize the independent pressure regulation of the high gear and the low gear, and simultaneously ensures the function of the conventional auxiliary gearbox air path switching, is particularly suitable for the air path control of the auxiliary gearbox of a heavy truck, can prolong the service life of the synchronizer of the auxiliary gearbox by independently regulating the high gear inlet air pressure and the low gear inlet air pressure, and greatly improves the economic benefit of the user.

[0042] The above technical scheme is only a relatively optimal specific embodiment of the application, but the protection scope of the application is not limited thereto, any skilled person in the art can think of changes or replacements within the technical range disclosed in the application without creative labor, which are all covered in the protection scope of the application.

Claims

1. A heavy truck high-low gear adjustable pressure air path, comprising a sub-tank cylinder (1), characterized in that, The high gear air pipe (2) and the low gear air pipe (3) are connected to the auxiliary box cylinder (1); One end of the high gear air pipe (2) is communicated with one side cavity of the auxiliary box cylinder (1), and one end of the low gear air pipe (3) is communicated with the other side cavity of the auxiliary box cylinder (1); The other end of the high gear air pipe (2) is communicated with the double H valve (4), and the other end of the low gear air pipe (3) is communicated with the double H valve (4); The high gear air pipe (2) and the low gear air pipe (3) are respectively provided with pressure regulating valves (5); The double H valve (4) is communicated with the air source (6).

2. The heavy-duty truck high-low range adjustable pressure air path of claim 1, wherein, The air source (6) comprises an air filter (6-1) and an air path control valve (6-2) communicated with the air filter (6-1), and the air filter (6-1) is communicated with the air inlet of the air path control valve (6-2) through an air inlet pipe (6-3); The air source (6) further comprises a preselection valve (6-4), the first air outlet of the air path control valve (6-2) is communicated with the double H valve (4), the second air outlet of the air path control valve (6-2) is communicated with the air inlet of the preselection valve (6-4), and the air outlet of the preselection valve (6-4) is communicated with the control air port of the double H valve (4).

3. The heavy-duty truck high-low range adjustable pressure air path of claim 2, wherein, The first air outlet of the air path control valve (6-2) is communicated with the double H valve (4) through a first air outlet pipe (6-5), and the second air outlet of the air path control valve (6-2) is communicated with the air inlet of the preselection valve (6-4) through a second air outlet pipe (6-6); The air outlet of the preselection valve (6-4) is communicated with the control air port of the double H valve (4) through a third air outlet pipe (6-7).

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