CN219013325U - Double damping hole and control valve for composite throttling of main and auxiliary oil ways - Google Patents

Abstract

The utility model discloses a control valve with double damping holes and a main oil way and auxiliary oil way composite throttling, which belongs to the technical field of hydraulic valve bodies. The control valve can solve the problems that after a throttle mechanism is arranged, the old control valve often causes slow pressure build-up in the valve body, so that gear shifting is slow or the pressure build-up is too fast, and the impact is large.

Description

Double damping hole and control valve for composite throttling of main and auxiliary oil ways

Technical Field

The utility model relates to the technical field of hydraulic valve bodies, in particular to an operating valve with double damping holes and composite throttling of main and auxiliary oil ways.

Background

The operating valve generally comprises a speed changing and shifting valve, a braking valve and a pressure reducing buffer valve, all valve bodies are communicated through an oil path, the operating valve is often provided with a throttling mechanism in the oil path for realizing slow pressure building so as to improve the stability of gear shifting, for example, a throttling part is arranged at an oil inlet of the pressure reducing buffer valve, but after the throttling mechanism is arranged, the old operating valve is often provided with the throttling mechanism, the whole process in the valve body is slowly built, so that the gear shifting is slow, and therefore, a novel operating valve is needed in the market to solve the defects in the prior art.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model aims to provide the control valve with double damping holes and composite throttling of the main oil way and the auxiliary oil way, which can solve the problems that the old control valve is slow in pressure establishment in the whole valve body after a throttling mechanism is arranged, so that gear shifting is slow.

The technical aim of the utility model is realized by the following technical scheme: the control valve comprises a valve body, wherein a speed changing and shifting valve, a braking valve and a pressure reducing buffer valve are arranged on the valve body, oil ways for communicating the speed changing and shifting valve, the braking valve and the pressure reducing buffer valve are also arranged on the valve body, the oil ways comprise a main oil way and an auxiliary oil way, the main oil way is communicated with the speed changing and shifting valve and the braking valve, the auxiliary oil way is a branch of the main oil way, and the auxiliary oil way is communicated with the speed changing and shifting valve and the pressure reducing buffer valve; the valve body is internally provided with an installation cavity for installing the pressure reducing buffer valve, the pressure reducing buffer valve comprises a valve rod, a spring sleeved on the valve rod and a sliding block capable of moving along the axial direction of the valve rod and elastically extruding with the spring, an oil cavity is arranged in the installation cavity, the sliding block can be pushed to move by filling oil into the oil cavity, and the oil cavity is communicated with the auxiliary oil path through a first damping hole and a second damping hole; the second damping hole is always communicated with the oil cavity, when oil is not filled into the oil cavity, the first damping hole is blocked by the sliding block, and along with the movement of the sliding block, the first damping hole is finally communicated with the oil cavity.

In some embodiments, the main oil circuit includes a main oil circuit front section and a main oil circuit rear section, the main oil circuit front section and the main oil circuit rear section being in communication through a through hole.

In some embodiments, a sealing paper pad is attached to one side of the valve body, on which the oil path is formed.

In some embodiments, the sliding block is in a cylindrical structure with two symmetrical ends, and a plurality of annular grooves are formed in the outer side wall of the sliding block.

In summary, the utility model has the following beneficial effects:

the control valve with the double damping holes and the combined throttling of the main oil way and the auxiliary oil way is characterized in that the control valve is independently filled with oil and built with pressure by means of the second damping hole, initial throttling and slow oil filling and build with pressure are realized, after the sliding block is pushed to a certain extent by the pressure of hydraulic oil, the pressure is built with the first damping hole and the second damping hole synchronously filled with oil, and the quick oil filling and build with pressure after the initial throttling is realized, so that the slow build with pressure is realized firstly, the stability of gear shifting can be improved by the slow build with pressure in the initial stage, and the situation of slow gear shifting can be avoided.

Drawings

Fig. 1 is a schematic view of the structure of an oil passage opening side of the present utility model;

FIG. 2 is a side view of the present utility model;

FIG. 3 is a schematic cross-sectional view of A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view of B-B of FIG. 3;

fig. 5 is an enlarged view at C of fig. 4.

In the figure: 1. a valve body; 2. a variable speed shift valve; 3. a brake valve; 4. a deceleration buffer valve; 401. an oil chamber; 402. a slide block; 403. a valve stem; 404. a spring; 5. a front section of the main oil way; 6. the rear section of the main oil way; 7. a through hole; 8. an auxiliary oil path; 9. a first damping hole; 10. and a second damping hole.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1-5, a double-damping hole and main and auxiliary oil way combined throttle control valve is matched with a clutch to use, and comprises a valve body 1, wherein a speed change gear shift valve 2, a brake valve 3 and a pressure reducing buffer valve 4 are arranged on the valve body 1, the pressure reducing buffer valve 4 is used for directly controlling contact and separation of friction plates of the clutch, an oil way which is communicated with the speed change gear shift valve 2, the brake valve 3 and the pressure reducing buffer valve 4 is also arranged on the valve body 1, a sealing paper gasket is stuck on one side of the valve body 1 where the oil way is arranged, and the sealing paper gasket is not adopted, so that the sealing paper gasket is not adopted, and oil leakage of the valve body 1 are easily caused under the condition that the oil temperature is too high, the paper gasket is free from the problems, the oil way in the valve body 1 comprises a main oil way and an auxiliary oil way 8, the main oil way is communicated with the speed change gear shift valve 2 and the brake valve 3, the auxiliary oil way 8 is a branch of the main oil way, the auxiliary oil way 8 is communicated with the speed change gear shift valve 2 and the pressure reducing buffer valve 4, and the main oil way 5 can be separated into a front section and a rear section of the main oil way 6 and a rear section 7 of the main oil way, and a front section 6 and a rear section of the main oil way is communicated with a rear section 7 of the main oil way.

The valve body 1 is internally provided with an installation cavity for installing the pressure reducing buffer valve 4, the pressure reducing buffer valve 4 comprises a valve rod 403, a spring 404 sleeved on the valve rod 403 and a sliding block 402 capable of moving along the axial direction of the valve rod 403 and elastically extruding with the spring 404, the sliding block 402 moves to drive the clutch friction plate to move, an oil cavity 401 is arranged in the installation cavity, the sliding block 402 can be pushed to move by filling oil into the oil cavity 401 so as to drive the clutch friction plate to move, in some embodiments, the sliding block 402 is of a cylindrical structure with symmetrical two ends, a plurality of annular grooves are formed in the outer side wall of the sliding block 402, hydraulic oil can enter the annular grooves when filled with oil, an oil pad is formed to support the sliding block 402, sliding friction generated by the sliding block 402 is reduced, so that the sliding block 402 is prevented from being blocked, the oil cavity 401 is communicated with an auxiliary oil path 8 through a first damping hole 9 and a second damping hole 10, the second damping hole 10 is always communicated with the oil cavity 401, and when the oil cavity 401 is not filled with oil, the first damping hole 9 is blocked by the sliding block 402, and the first damping hole 9 is finally communicated with the oil cavity 401.

The auxiliary oil path 8 is communicated with the oil cavity 401 of the deceleration buffer valve 4 through the first damping hole 9 and the second damping hole 10, wherein the second damping hole 10 is always communicated with the oil cavity 401, when the oil cavity 401 is not filled with oil, the first damping hole 9 is blocked by the sliding block 402, and along with the movement of the sliding block 402, the first damping hole 9 is communicated with the oil cavity 401, so that the initial throttling and slow pressure building (soft contact of a clutch friction plate during the period) are realized by filling the oil cavity 401 only through the second damping hole 10 at the initial stage of pressure building, and along with the continuous filling of hydraulic oil in the oil cavity 401, the sliding block 402 is pushed to move by the pressure generated by the hydraulic oil, and when the sliding block 402 moves to the state of not blocking the first damping hole 401, the first damping hole 9 and the second damping hole 10 are synchronously filled with the oil to realize quick pressure building (the quick and tight fit of the clutch friction plate in place during the period) until the hydraulic oil pressure in the valve body 1 reaches a specified pressure value.

In view of the above, the present utility model firstly uses the second damping hole 10 to independently fill oil and build pressure to realize initial throttle and slow oil filling and build pressure, and then uses the first damping hole 9 and the second damping hole 10 to synchronously fill oil and build pressure after the slider 402 is pushed to a certain extent by the pressure of hydraulic oil to realize fast oil filling and build pressure after initial throttle, so that the slow-first-second-fast build pressure mode can not only improve the stability of gear shifting by the slow-first build pressure, but also avoid the situation of slow gear shifting, thereby solving the problem that the old operating valve always causes slow overall build pressure in the valve body after the throttle mechanism is arranged, and thus causes slow gear shifting.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

Claims (4)

1. The utility model provides an operating valve of compound throttle of two damping holes and main, auxiliary oil circuit, includes valve body (1), install speed change gear shift valve (2), brake valve (3) and decompression cushion valve (4) on valve body (1), still offered the intercommunication on valve body (1) speed change gear shift valve (2) brake valve (3) and the oil circuit of decompression cushion valve (4), its characterized in that:

the oil circuit comprises a main oil circuit and an auxiliary oil circuit (8), the main oil circuit is communicated with the speed change gear shifting valve (2) and the brake valve (3), the auxiliary oil circuit (8) is a branch of the main oil circuit, and the auxiliary oil circuit (8) is communicated with the speed change gear shifting valve (2) and the pressure reducing buffer valve (4);

an installation cavity is formed in the valve body (1) for installation of the pressure reducing buffer valve (4), the pressure reducing buffer valve (4) comprises a valve rod (403), a spring (404) sleeved on the valve rod (403) and a sliding block (402) capable of moving along the axial direction of the valve rod (403) and elastically extruding with the spring (404), an oil cavity (401) is formed in the installation cavity, the sliding block (402) can be pushed to move by filling oil into the oil cavity (401), and the oil cavity (401) is communicated with the auxiliary oil way (8) through a first damping hole (9) and a second damping hole (10);

the second damping hole (10) is always communicated with the oil cavity (401), when oil is not filled into the oil cavity (401), the first damping hole (9) is blocked by the sliding block (402), and along with the movement of the sliding block (402), the first damping hole (9) is finally communicated with the oil cavity (401).

2. The control valve with double damping holes and composite throttling of main and auxiliary oil ways according to claim 1, which is characterized in that: the main oil way comprises a main oil way front section (5) and a main oil way rear section (6), and the main oil way front section (5) and the main oil way rear section (6) are communicated through a through hole (7).

3. The control valve with double damping holes and composite throttling of main and auxiliary oil ways according to claim 1, which is characterized in that: one side of the valve body (1) provided with an oil way is stuck with a sealing paper pad.

4. The control valve with double damping holes and composite throttling of main and auxiliary oil ways according to claim 1, which is characterized in that: the sliding block (402) is of a cylindrical structure with two symmetrical ends, and a plurality of annular grooves are formed in the outer side wall of the sliding block (402).

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